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2004-06-01 Paolo Bonzini <bonzini@gnu.org>
[binutils.git] / bfd / elf32-s390.c
blobfb8758b37ccc59098a40b2a3874577971430a4db
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
3 Contributed by Carl B. Pedersen and Martin Schwidefsky.
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27
28 static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30 static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
32 static bfd_boolean elf_s390_is_local_label_name
33 PARAMS ((bfd *, const char *));
34 static struct bfd_hash_entry *link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
37 PARAMS ((bfd *));
38 static bfd_boolean create_got_section
39 PARAMS((bfd *, struct bfd_link_info *));
40 static bfd_boolean elf_s390_create_dynamic_sections
41 PARAMS((bfd *, struct bfd_link_info *));
42 static void elf_s390_copy_indirect_symbol
43 PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *,
44 struct elf_link_hash_entry *));
45 static bfd_boolean elf_s390_check_relocs
46 PARAMS ((bfd *, struct bfd_link_info *, asection *,
47 const Elf_Internal_Rela *));
48 static asection *elf_s390_gc_mark_hook
49 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
50 struct elf_link_hash_entry *, Elf_Internal_Sym *));
51 static bfd_boolean elf_s390_gc_sweep_hook
52 PARAMS ((bfd *, struct bfd_link_info *, asection *,
53 const Elf_Internal_Rela *));
54 struct elf_s390_link_hash_entry;
55 static void elf_s390_adjust_gotplt
56 PARAMS ((struct elf_s390_link_hash_entry *));
57 static bfd_boolean elf_s390_adjust_dynamic_symbol
58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
59 static bfd_boolean allocate_dynrelocs
60 PARAMS ((struct elf_link_hash_entry *, PTR));
61 static bfd_boolean readonly_dynrelocs
62 PARAMS ((struct elf_link_hash_entry *, PTR));
63 static bfd_boolean elf_s390_size_dynamic_sections
64 PARAMS ((bfd *, struct bfd_link_info *));
65 static bfd_boolean elf_s390_relocate_section
66 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
67 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
68 static bfd_boolean elf_s390_finish_dynamic_symbol
69 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
70 Elf_Internal_Sym *));
71 static enum elf_reloc_type_class elf_s390_reloc_type_class
72 PARAMS ((const Elf_Internal_Rela *));
73 static bfd_boolean elf_s390_finish_dynamic_sections
74 PARAMS ((bfd *, struct bfd_link_info *));
75 static bfd_boolean elf_s390_mkobject
76 PARAMS ((bfd *));
77 static bfd_boolean elf_s390_object_p
78 PARAMS ((bfd *));
79 static bfd_boolean elf_s390_grok_prstatus
80 PARAMS ((bfd *, Elf_Internal_Note *));
81 static int elf_s390_tls_transition
82 PARAMS ((struct bfd_link_info *, int, int));
83 static bfd_reloc_status_type s390_tls_reloc
84 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
85 static bfd_vma dtpoff_base
86 PARAMS ((struct bfd_link_info *));
87 static bfd_vma tpoff
88 PARAMS ((struct bfd_link_info *, bfd_vma));
89 static void invalid_tls_insn
90 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
91 static bfd_reloc_status_type s390_elf_ldisp_reloc
92 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
93
94 #include "elf/s390.h"
95
96 /* The relocation "howto" table. */
97
98 static reloc_howto_type elf_howto_table[] =
99 {
100 HOWTO (R_390_NONE, /* type */
101 0, /* rightshift */
102 0, /* size (0 = byte, 1 = short, 2 = long) */
103 0, /* bitsize */
104 FALSE, /* pc_relative */
105 0, /* bitpos */
106 complain_overflow_dont, /* complain_on_overflow */
107 bfd_elf_generic_reloc, /* special_function */
108 "R_390_NONE", /* name */
109 FALSE, /* partial_inplace */
110 0, /* src_mask */
111 0, /* dst_mask */
112 FALSE), /* pcrel_offset */
113
114 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
116 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
117 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
118 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
120 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
122 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
124 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
126 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
128 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
130 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
132 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
134 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
136 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
138 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
140 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
142 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
144 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
146 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
148 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
150 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
152 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
154 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
156 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
157 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
158 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
159 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
160 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
162 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
164 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
165 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
166 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
167 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
169 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
171 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
178 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
179 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
180 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
181 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
182 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
183 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
184 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
185 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
186 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
187 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
188 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
189 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
190 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
191 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
192 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
193 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
194 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
195 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
196 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
197 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
198 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
199 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
200 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
201 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
202 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
203 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
204 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
206 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
207 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
208 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
209 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
210 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
211 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
212 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
213 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
214 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
215 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
216 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
217 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
218 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
219 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
220 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
221 };
222
223 /* GNU extension to record C++ vtable hierarchy. */
224 static reloc_howto_type elf32_s390_vtinherit_howto =
225 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
226 static reloc_howto_type elf32_s390_vtentry_howto =
227 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
228
229 static reloc_howto_type *
230 elf_s390_reloc_type_lookup (abfd, code)
231 bfd *abfd ATTRIBUTE_UNUSED;
232 bfd_reloc_code_real_type code;
233 {
234 switch (code)
235 {
236 case BFD_RELOC_NONE:
237 return &elf_howto_table[(int) R_390_NONE];
238 case BFD_RELOC_8:
239 return &elf_howto_table[(int) R_390_8];
240 case BFD_RELOC_390_12:
241 return &elf_howto_table[(int) R_390_12];
242 case BFD_RELOC_16:
243 return &elf_howto_table[(int) R_390_16];
244 case BFD_RELOC_32:
245 return &elf_howto_table[(int) R_390_32];
246 case BFD_RELOC_CTOR:
247 return &elf_howto_table[(int) R_390_32];
248 case BFD_RELOC_32_PCREL:
249 return &elf_howto_table[(int) R_390_PC32];
250 case BFD_RELOC_390_GOT12:
251 return &elf_howto_table[(int) R_390_GOT12];
252 case BFD_RELOC_32_GOT_PCREL:
253 return &elf_howto_table[(int) R_390_GOT32];
254 case BFD_RELOC_390_PLT32:
255 return &elf_howto_table[(int) R_390_PLT32];
256 case BFD_RELOC_390_COPY:
257 return &elf_howto_table[(int) R_390_COPY];
258 case BFD_RELOC_390_GLOB_DAT:
259 return &elf_howto_table[(int) R_390_GLOB_DAT];
260 case BFD_RELOC_390_JMP_SLOT:
261 return &elf_howto_table[(int) R_390_JMP_SLOT];
262 case BFD_RELOC_390_RELATIVE:
263 return &elf_howto_table[(int) R_390_RELATIVE];
264 case BFD_RELOC_32_GOTOFF:
265 return &elf_howto_table[(int) R_390_GOTOFF32];
266 case BFD_RELOC_390_GOTPC:
267 return &elf_howto_table[(int) R_390_GOTPC];
268 case BFD_RELOC_390_GOT16:
269 return &elf_howto_table[(int) R_390_GOT16];
270 case BFD_RELOC_16_PCREL:
271 return &elf_howto_table[(int) R_390_PC16];
272 case BFD_RELOC_390_PC16DBL:
273 return &elf_howto_table[(int) R_390_PC16DBL];
274 case BFD_RELOC_390_PLT16DBL:
275 return &elf_howto_table[(int) R_390_PLT16DBL];
276 case BFD_RELOC_390_PC32DBL:
277 return &elf_howto_table[(int) R_390_PC32DBL];
278 case BFD_RELOC_390_PLT32DBL:
279 return &elf_howto_table[(int) R_390_PLT32DBL];
280 case BFD_RELOC_390_GOTPCDBL:
281 return &elf_howto_table[(int) R_390_GOTPCDBL];
282 case BFD_RELOC_390_GOTENT:
283 return &elf_howto_table[(int) R_390_GOTENT];
284 case BFD_RELOC_16_GOTOFF:
285 return &elf_howto_table[(int) R_390_GOTOFF16];
286 case BFD_RELOC_390_GOTPLT12:
287 return &elf_howto_table[(int) R_390_GOTPLT12];
288 case BFD_RELOC_390_GOTPLT16:
289 return &elf_howto_table[(int) R_390_GOTPLT16];
290 case BFD_RELOC_390_GOTPLT32:
291 return &elf_howto_table[(int) R_390_GOTPLT32];
292 case BFD_RELOC_390_GOTPLTENT:
293 return &elf_howto_table[(int) R_390_GOTPLTENT];
294 case BFD_RELOC_390_PLTOFF16:
295 return &elf_howto_table[(int) R_390_PLTOFF16];
296 case BFD_RELOC_390_PLTOFF32:
297 return &elf_howto_table[(int) R_390_PLTOFF32];
298 case BFD_RELOC_390_TLS_LOAD:
299 return &elf_howto_table[(int) R_390_TLS_LOAD];
300 case BFD_RELOC_390_TLS_GDCALL:
301 return &elf_howto_table[(int) R_390_TLS_GDCALL];
302 case BFD_RELOC_390_TLS_LDCALL:
303 return &elf_howto_table[(int) R_390_TLS_LDCALL];
304 case BFD_RELOC_390_TLS_GD32:
305 return &elf_howto_table[(int) R_390_TLS_GD32];
306 case BFD_RELOC_390_TLS_GOTIE12:
307 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
308 case BFD_RELOC_390_TLS_GOTIE32:
309 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
310 case BFD_RELOC_390_TLS_LDM32:
311 return &elf_howto_table[(int) R_390_TLS_LDM32];
312 case BFD_RELOC_390_TLS_IE32:
313 return &elf_howto_table[(int) R_390_TLS_IE32];
314 case BFD_RELOC_390_TLS_IEENT:
315 return &elf_howto_table[(int) R_390_TLS_IEENT];
316 case BFD_RELOC_390_TLS_LE32:
317 return &elf_howto_table[(int) R_390_TLS_LE32];
318 case BFD_RELOC_390_TLS_LDO32:
319 return &elf_howto_table[(int) R_390_TLS_LDO32];
320 case BFD_RELOC_390_TLS_DTPMOD:
321 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
322 case BFD_RELOC_390_TLS_DTPOFF:
323 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
324 case BFD_RELOC_390_TLS_TPOFF:
325 return &elf_howto_table[(int) R_390_TLS_TPOFF];
326 case BFD_RELOC_390_20:
327 return &elf_howto_table[(int) R_390_20];
328 case BFD_RELOC_390_GOT20:
329 return &elf_howto_table[(int) R_390_GOT20];
330 case BFD_RELOC_390_GOTPLT20:
331 return &elf_howto_table[(int) R_390_GOTPLT20];
332 case BFD_RELOC_390_TLS_GOTIE20:
333 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
334 case BFD_RELOC_VTABLE_INHERIT:
335 return &elf32_s390_vtinherit_howto;
336 case BFD_RELOC_VTABLE_ENTRY:
337 return &elf32_s390_vtentry_howto;
338 default:
339 break;
340 }
341 return 0;
342 }
343
344 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
345 and elf32-s390.c has its own copy. */
346
347 static void
348 elf_s390_info_to_howto (abfd, cache_ptr, dst)
349 bfd *abfd ATTRIBUTE_UNUSED;
350 arelent *cache_ptr;
351 Elf_Internal_Rela *dst;
352 {
353 switch (ELF32_R_TYPE(dst->r_info))
354 {
355 case R_390_GNU_VTINHERIT:
356 cache_ptr->howto = &elf32_s390_vtinherit_howto;
357 break;
358
359 case R_390_GNU_VTENTRY:
360 cache_ptr->howto = &elf32_s390_vtentry_howto;
361 break;
362
363 default:
364 BFD_ASSERT (ELF32_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
365 cache_ptr->howto = &elf_howto_table[ELF32_R_TYPE(dst->r_info)];
366 }
367 }
368
369 /* A relocation function which doesn't do anything. */
370 static bfd_reloc_status_type
371 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
372 output_bfd, error_message)
373 bfd *abfd ATTRIBUTE_UNUSED;
374 arelent *reloc_entry;
375 asymbol *symbol ATTRIBUTE_UNUSED;
376 PTR data ATTRIBUTE_UNUSED;
377 asection *input_section;
378 bfd *output_bfd;
379 char **error_message ATTRIBUTE_UNUSED;
380 {
381 if (output_bfd)
382 reloc_entry->address += input_section->output_offset;
383 return bfd_reloc_ok;
384 }
385
386 /* Handle the large displacement relocs. */
387 static bfd_reloc_status_type
388 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
389 output_bfd, error_message)
390 bfd *abfd ATTRIBUTE_UNUSED;
391 arelent *reloc_entry;
392 asymbol *symbol;
393 PTR data ATTRIBUTE_UNUSED;
394 asection *input_section;
395 bfd *output_bfd;
396 char **error_message ATTRIBUTE_UNUSED;
397 {
398 reloc_howto_type *howto = reloc_entry->howto;
399 bfd_vma relocation;
400 bfd_vma insn;
401
402 if (output_bfd != (bfd *) NULL
403 && (symbol->flags & BSF_SECTION_SYM) == 0
404 && (! howto->partial_inplace
405 || reloc_entry->addend == 0))
406 {
407 reloc_entry->address += input_section->output_offset;
408 return bfd_reloc_ok;
409 }
410
411 if (output_bfd != NULL)
412 return bfd_reloc_continue;
413
414 if (reloc_entry->address > input_section->_cooked_size)
415 return bfd_reloc_outofrange;
416
417 relocation = (symbol->value
418 + symbol->section->output_section->vma
419 + symbol->section->output_offset);
420 relocation += reloc_entry->addend;
421 if (howto->pc_relative)
422 {
423 relocation -= (input_section->output_section->vma
424 + input_section->output_offset);
425 relocation -= reloc_entry->address;
426 }
427
428 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
429 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
430 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
431
432 if ((bfd_signed_vma) relocation < - 0x80000
433 || (bfd_signed_vma) relocation > 0x7ffff)
434 return bfd_reloc_overflow;
435 else
436 return bfd_reloc_ok;
437 }
438
439 static bfd_boolean
440 elf_s390_is_local_label_name (abfd, name)
441 bfd *abfd;
442 const char *name;
443 {
444 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
445 return TRUE;
446
447 return _bfd_elf_is_local_label_name (abfd, name);
448 }
449
450 /* Functions for the 390 ELF linker. */
451
452 /* The name of the dynamic interpreter. This is put in the .interp
453 section. */
454
455 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
456
457 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
458 copying dynamic variables from a shared lib into an app's dynbss
459 section, and instead use a dynamic relocation to point into the
460 shared lib. */
461 #define ELIMINATE_COPY_RELOCS 1
462
463 /* The size in bytes of the first entry in the procedure linkage table. */
464 #define PLT_FIRST_ENTRY_SIZE 32
465 /* The size in bytes of an entry in the procedure linkage table. */
466 #define PLT_ENTRY_SIZE 32
467
468 #define GOT_ENTRY_SIZE 4
469
470 /* The first three entries in a procedure linkage table are reserved,
471 and the initial contents are unimportant (we zero them out).
472 Subsequent entries look like this. See the SVR4 ABI 386
473 supplement to see how this works. */
474
475 /* For the s390, simple addr offset can only be 0 - 4096.
476 To use the full 2 GB address space, several instructions
477 are needed to load an address in a register and execute
478 a branch( or just saving the address)
479
480 Furthermore, only r 0 and 1 are free to use!!! */
481
482 /* The first 3 words in the GOT are then reserved.
483 Word 0 is the address of the dynamic table.
484 Word 1 is a pointer to a structure describing the object
485 Word 2 is used to point to the loader entry address.
486
487 The code for position independent PLT entries looks like this:
488
489 r12 holds addr of the current GOT at entry to the PLT
490
491 The GOT holds the address in the PLT to be executed.
492 The loader then gets:
493 24(15) = Pointer to the structure describing the object.
494 28(15) = Offset in symbol table
495
496 The loader must then find the module where the function is
497 and insert the address in the GOT.
498
499 Note: 390 can only address +- 64 K relative.
500 We check if offset > 65536, then make a relative branch -64xxx
501 back to a previous defined branch
502
503 PLT1: BASR 1,0 # 2 bytes
504 L 1,22(1) # 4 bytes Load offset in GOT in r 1
505 L 1,(1,12) # 4 bytes Load address from GOT in r1
506 BCR 15,1 # 2 bytes Jump to address
507 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
508 L 1,14(1) # 4 bytes Load offset in symol table in r1
509 BRC 15,-x # 4 bytes Jump to start of PLT
510 .word 0 # 2 bytes filler
511 .long ? # 4 bytes offset in GOT
512 .long ? # 4 bytes offset into symbol table
513
514 This was the general case. There are two additional, optimizes PLT
515 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
516 First the one for GOT offsets < 4096:
517
518 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
519 BCR 15,1 # 2 bytes Jump to address
520 .word 0,0,0 # 6 bytes filler
521 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
522 L 1,14(1) # 4 bytes Load offset in symbol table in r1
523 BRC 15,-x # 4 bytes Jump to start of PLT
524 .word 0,0,0 # 6 bytes filler
525 .long ? # 4 bytes offset into symbol table
526
527 Second the one for GOT offsets < 32768:
528
529 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
530 L 1,(1,12) # 4 bytes Load address from GOT to r1
531 BCR 15,1 # 2 bytes Jump to address
532 .word 0 # 2 bytes filler
533 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
534 L 1,14(1) # 4 bytes Load offset in symbol table in r1
535 BRC 15,-x # 4 bytes Jump to start of PLT
536 .word 0,0,0 # 6 bytes filler
537 .long ? # 4 bytes offset into symbol table
538
539 Total = 32 bytes per PLT entry
540
541 The code for static build PLT entries looks like this:
542
543 PLT1: BASR 1,0 # 2 bytes
544 L 1,22(1) # 4 bytes Load address of GOT entry
545 L 1,0(0,1) # 4 bytes Load address from GOT in r1
546 BCR 15,1 # 2 bytes Jump to address
547 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
548 L 1,14(1) # 4 bytes Load offset in symbol table in r1
549 BRC 15,-x # 4 bytes Jump to start of PLT
550 .word 0 # 2 bytes filler
551 .long ? # 4 bytes address of GOT entry
552 .long ? # 4 bytes offset into symbol table */
553
554 #define PLT_PIC_ENTRY_WORD0 0x0d105810
555 #define PLT_PIC_ENTRY_WORD1 0x10165811
556 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
557 #define PLT_PIC_ENTRY_WORD3 0x0d105810
558 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
559
560 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
561 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
562 #define PLT_PIC12_ENTRY_WORD2 0x00000000
563 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
564 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
565
566 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
567 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
568 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
569 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
570 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
571
572 #define PLT_ENTRY_WORD0 0x0d105810
573 #define PLT_ENTRY_WORD1 0x10165810
574 #define PLT_ENTRY_WORD2 0x100007f1
575 #define PLT_ENTRY_WORD3 0x0d105810
576 #define PLT_ENTRY_WORD4 0x100ea7f4
577
578 /* The first PLT entry pushes the offset into the symbol table
579 from R1 onto the stack at 8(15) and the loader object info
580 at 12(15), loads the loader address in R1 and jumps to it. */
581
582 /* The first entry in the PLT for PIC code:
583
584 PLT0:
585 ST 1,28(15) # R1 has offset into symbol table
586 L 1,4(12) # Get loader ino(object struct address)
587 ST 1,24(15) # Store address
588 L 1,8(12) # Entry address of loader in R1
589 BR 1 # Jump to loader
590
591 The first entry in the PLT for static code:
592
593 PLT0:
594 ST 1,28(15) # R1 has offset into symbol table
595 BASR 1,0
596 L 1,18(0,1) # Get address of GOT
597 MVC 24(4,15),4(1) # Move loader ino to stack
598 L 1,8(1) # Get address of loader
599 BR 1 # Jump to loader
600 .word 0 # filler
601 .long got # address of GOT */
602
603 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
604 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
605 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
606 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
607 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
608
609 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
610 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
611 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
612 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
613 #define PLT_FIRST_ENTRY_WORD4 0x58101008
614 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
615
616 /* The s390 linker needs to keep track of the number of relocs that it
617 decides to copy as dynamic relocs in check_relocs for each symbol.
618 This is so that it can later discard them if they are found to be
619 unnecessary. We store the information in a field extending the
620 regular ELF linker hash table. */
621
622 struct elf_s390_dyn_relocs
623 {
624 struct elf_s390_dyn_relocs *next;
625
626 /* The input section of the reloc. */
627 asection *sec;
628
629 /* Total number of relocs copied for the input section. */
630 bfd_size_type count;
631
632 /* Number of pc-relative relocs copied for the input section. */
633 bfd_size_type pc_count;
634 };
635
636 /* s390 ELF linker hash entry. */
637
638 struct elf_s390_link_hash_entry
639 {
640 struct elf_link_hash_entry elf;
641
642 /* Track dynamic relocs copied for this symbol. */
643 struct elf_s390_dyn_relocs *dyn_relocs;
644
645 /* Number of GOTPLT references for a function. */
646 bfd_signed_vma gotplt_refcount;
647
648 #define GOT_UNKNOWN 0
649 #define GOT_NORMAL 1
650 #define GOT_TLS_GD 2
651 #define GOT_TLS_IE 3
652 #define GOT_TLS_IE_NLT 4
653 unsigned char tls_type;
654 };
655
656 #define elf_s390_hash_entry(ent) \
657 ((struct elf_s390_link_hash_entry *)(ent))
658
659 struct elf_s390_obj_tdata
660 {
661 struct elf_obj_tdata root;
662
663 /* tls_type for each local got entry. */
664 char *local_got_tls_type;
665 };
666
667 #define elf_s390_tdata(abfd) \
668 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
669
670 #define elf_s390_local_got_tls_type(abfd) \
671 (elf_s390_tdata (abfd)->local_got_tls_type)
672
673 static bfd_boolean
674 elf_s390_mkobject (abfd)
675 bfd *abfd;
676 {
677 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
678 abfd->tdata.any = bfd_zalloc (abfd, amt);
679 if (abfd->tdata.any == NULL)
680 return FALSE;
681 return TRUE;
682 }
683
684 static bfd_boolean
685 elf_s390_object_p (abfd)
686 bfd *abfd;
687 {
688 /* Set the right machine number for an s390 elf32 file. */
689 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
690 }
691
692 /* s390 ELF linker hash table. */
693
694 struct elf_s390_link_hash_table
695 {
696 struct elf_link_hash_table elf;
697
698 /* Short-cuts to get to dynamic linker sections. */
699 asection *sgot;
700 asection *sgotplt;
701 asection *srelgot;
702 asection *splt;
703 asection *srelplt;
704 asection *sdynbss;
705 asection *srelbss;
706
707 union {
708 bfd_signed_vma refcount;
709 bfd_vma offset;
710 } tls_ldm_got;
711
712 /* Small local sym to section mapping cache. */
713 struct sym_sec_cache sym_sec;
714 };
715
716 /* Get the s390 ELF linker hash table from a link_info structure. */
717
718 #define elf_s390_hash_table(p) \
719 ((struct elf_s390_link_hash_table *) ((p)->hash))
720
721 /* Create an entry in an s390 ELF linker hash table. */
722
723 static struct bfd_hash_entry *
724 link_hash_newfunc (entry, table, string)
725 struct bfd_hash_entry *entry;
726 struct bfd_hash_table *table;
727 const char *string;
728 {
729 /* Allocate the structure if it has not already been allocated by a
730 subclass. */
731 if (entry == NULL)
732 {
733 entry = bfd_hash_allocate (table,
734 sizeof (struct elf_s390_link_hash_entry));
735 if (entry == NULL)
736 return entry;
737 }
738
739 /* Call the allocation method of the superclass. */
740 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
741 if (entry != NULL)
742 {
743 struct elf_s390_link_hash_entry *eh;
744
745 eh = (struct elf_s390_link_hash_entry *) entry;
746 eh->dyn_relocs = NULL;
747 eh->gotplt_refcount = 0;
748 eh->tls_type = GOT_UNKNOWN;
749 }
750
751 return entry;
752 }
753
754 /* Create an s390 ELF linker hash table. */
755
756 static struct bfd_link_hash_table *
757 elf_s390_link_hash_table_create (abfd)
758 bfd *abfd;
759 {
760 struct elf_s390_link_hash_table *ret;
761 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
762
763 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
764 if (ret == NULL)
765 return NULL;
766
767 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
768 {
769 free (ret);
770 return NULL;
771 }
772
773 ret->sgot = NULL;
774 ret->sgotplt = NULL;
775 ret->srelgot = NULL;
776 ret->splt = NULL;
777 ret->srelplt = NULL;
778 ret->sdynbss = NULL;
779 ret->srelbss = NULL;
780 ret->tls_ldm_got.refcount = 0;
781 ret->sym_sec.abfd = NULL;
782
783 return &ret->elf.root;
784 }
785
786 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
787 shortcuts to them in our hash table. */
788
789 static bfd_boolean
790 create_got_section (dynobj, info)
791 bfd *dynobj;
792 struct bfd_link_info *info;
793 {
794 struct elf_s390_link_hash_table *htab;
795
796 if (! _bfd_elf_create_got_section (dynobj, info))
797 return FALSE;
798
799 htab = elf_s390_hash_table (info);
800 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
801 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
802 if (!htab->sgot || !htab->sgotplt)
803 abort ();
804
805 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
806 if (htab->srelgot == NULL
807 || ! bfd_set_section_flags (dynobj, htab->srelgot,
808 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
809 | SEC_IN_MEMORY | SEC_LINKER_CREATED
810 | SEC_READONLY))
811 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
812 return FALSE;
813 return TRUE;
814 }
815
816 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
817 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
818 hash table. */
819
820 static bfd_boolean
821 elf_s390_create_dynamic_sections (dynobj, info)
822 bfd *dynobj;
823 struct bfd_link_info *info;
824 {
825 struct elf_s390_link_hash_table *htab;
826
827 htab = elf_s390_hash_table (info);
828 if (!htab->sgot && !create_got_section (dynobj, info))
829 return FALSE;
830
831 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
832 return FALSE;
833
834 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
835 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
836 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
837 if (!info->shared)
838 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
839
840 if (!htab->splt || !htab->srelplt || !htab->sdynbss
841 || (!info->shared && !htab->srelbss))
842 abort ();
843
844 return TRUE;
845 }
846
847 /* Copy the extra info we tack onto an elf_link_hash_entry. */
848
849 static void
850 elf_s390_copy_indirect_symbol (bed, dir, ind)
851 const struct elf_backend_data *bed;
852 struct elf_link_hash_entry *dir, *ind;
853 {
854 struct elf_s390_link_hash_entry *edir, *eind;
855
856 edir = (struct elf_s390_link_hash_entry *) dir;
857 eind = (struct elf_s390_link_hash_entry *) ind;
858
859 if (eind->dyn_relocs != NULL)
860 {
861 if (edir->dyn_relocs != NULL)
862 {
863 struct elf_s390_dyn_relocs **pp;
864 struct elf_s390_dyn_relocs *p;
865
866 if (ind->root.type == bfd_link_hash_indirect)
867 abort ();
868
869 /* Add reloc counts against the weak sym to the strong sym
870 list. Merge any entries against the same section. */
871 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
872 {
873 struct elf_s390_dyn_relocs *q;
874
875 for (q = edir->dyn_relocs; q != NULL; q = q->next)
876 if (q->sec == p->sec)
877 {
878 q->pc_count += p->pc_count;
879 q->count += p->count;
880 *pp = p->next;
881 break;
882 }
883 if (q == NULL)
884 pp = &p->next;
885 }
886 *pp = edir->dyn_relocs;
887 }
888
889 edir->dyn_relocs = eind->dyn_relocs;
890 eind->dyn_relocs = NULL;
891 }
892
893 if (ind->root.type == bfd_link_hash_indirect
894 && dir->got.refcount <= 0)
895 {
896 edir->tls_type = eind->tls_type;
897 eind->tls_type = GOT_UNKNOWN;
898 }
899
900 if (ELIMINATE_COPY_RELOCS
901 && ind->root.type != bfd_link_hash_indirect
902 && (dir->elf_link_hash_flags & ELF_LINK_HASH_DYNAMIC_ADJUSTED) != 0)
903 /* If called to transfer flags for a weakdef during processing
904 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
905 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
906 dir->elf_link_hash_flags |=
907 (ind->elf_link_hash_flags & (ELF_LINK_HASH_REF_DYNAMIC
908 | ELF_LINK_HASH_REF_REGULAR
909 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
910 | ELF_LINK_HASH_NEEDS_PLT));
911 else
912 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
913 }
914
915 static int
916 elf_s390_tls_transition (info, r_type, is_local)
917 struct bfd_link_info *info;
918 int r_type;
919 int is_local;
920 {
921 if (info->shared)
922 return r_type;
923
924 switch (r_type)
925 {
926 case R_390_TLS_GD32:
927 case R_390_TLS_IE32:
928 if (is_local)
929 return R_390_TLS_LE32;
930 return R_390_TLS_IE32;
931 case R_390_TLS_GOTIE32:
932 if (is_local)
933 return R_390_TLS_LE32;
934 return R_390_TLS_GOTIE32;
935 case R_390_TLS_LDM32:
936 return R_390_TLS_LE32;
937 }
938
939 return r_type;
940 }
941
942 /* Look through the relocs for a section during the first phase, and
943 allocate space in the global offset table or procedure linkage
944 table. */
945
946 static bfd_boolean
947 elf_s390_check_relocs (abfd, info, sec, relocs)
948 bfd *abfd;
949 struct bfd_link_info *info;
950 asection *sec;
951 const Elf_Internal_Rela *relocs;
952 {
953 struct elf_s390_link_hash_table *htab;
954 Elf_Internal_Shdr *symtab_hdr;
955 struct elf_link_hash_entry **sym_hashes;
956 const Elf_Internal_Rela *rel;
957 const Elf_Internal_Rela *rel_end;
958 asection *sreloc;
959 bfd_signed_vma *local_got_refcounts;
960 int tls_type, old_tls_type;
961
962 if (info->relocatable)
963 return TRUE;
964
965 htab = elf_s390_hash_table (info);
966 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
967 sym_hashes = elf_sym_hashes (abfd);
968 local_got_refcounts = elf_local_got_refcounts (abfd);
969
970 sreloc = NULL;
971
972 rel_end = relocs + sec->reloc_count;
973 for (rel = relocs; rel < rel_end; rel++)
974 {
975 unsigned int r_type;
976 unsigned long r_symndx;
977 struct elf_link_hash_entry *h;
978
979 r_symndx = ELF32_R_SYM (rel->r_info);
980
981 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
982 {
983 (*_bfd_error_handler) (_("%s: bad symbol index: %d"),
984 bfd_archive_filename (abfd),
985 r_symndx);
986 return FALSE;
987 }
988
989 if (r_symndx < symtab_hdr->sh_info)
990 h = NULL;
991 else
992 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
993
994 /* Create got section and local_got_refcounts array if they
995 are needed. */
996 r_type = elf_s390_tls_transition (info,
997 ELF32_R_TYPE (rel->r_info),
998 h == NULL);
999 switch (r_type)
1000 {
1001 case R_390_GOT12:
1002 case R_390_GOT16:
1003 case R_390_GOT20:
1004 case R_390_GOT32:
1005 case R_390_GOTENT:
1006 case R_390_GOTPLT12:
1007 case R_390_GOTPLT16:
1008 case R_390_GOTPLT20:
1009 case R_390_GOTPLT32:
1010 case R_390_GOTPLTENT:
1011 case R_390_TLS_GD32:
1012 case R_390_TLS_GOTIE12:
1013 case R_390_TLS_GOTIE20:
1014 case R_390_TLS_GOTIE32:
1015 case R_390_TLS_IEENT:
1016 case R_390_TLS_IE32:
1017 case R_390_TLS_LDM32:
1018 if (h == NULL
1019 && local_got_refcounts == NULL)
1020 {
1021 bfd_size_type size;
1022
1023 size = symtab_hdr->sh_info;
1024 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1025 local_got_refcounts = ((bfd_signed_vma *)
1026 bfd_zalloc (abfd, size));
1027 if (local_got_refcounts == NULL)
1028 return FALSE;
1029 elf_local_got_refcounts (abfd) = local_got_refcounts;
1030 elf_s390_local_got_tls_type (abfd)
1031 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1032 }
1033 /* Fall through. */
1034 case R_390_GOTOFF16:
1035 case R_390_GOTOFF32:
1036 case R_390_GOTPC:
1037 case R_390_GOTPCDBL:
1038 if (htab->sgot == NULL)
1039 {
1040 if (htab->elf.dynobj == NULL)
1041 htab->elf.dynobj = abfd;
1042 if (!create_got_section (htab->elf.dynobj, info))
1043 return FALSE;
1044 }
1045 }
1046
1047 switch (r_type)
1048 {
1049 case R_390_GOTOFF16:
1050 case R_390_GOTOFF32:
1051 case R_390_GOTPC:
1052 case R_390_GOTPCDBL:
1053 /* Got is created, nothing to be done. */
1054 break;
1055
1056 case R_390_PLT16DBL:
1057 case R_390_PLT32DBL:
1058 case R_390_PLT32:
1059 case R_390_PLTOFF16:
1060 case R_390_PLTOFF32:
1061 /* This symbol requires a procedure linkage table entry. We
1062 actually build the entry in adjust_dynamic_symbol,
1063 because this might be a case of linking PIC code which is
1064 never referenced by a dynamic object, in which case we
1065 don't need to generate a procedure linkage table entry
1066 after all. */
1067
1068 /* If this is a local symbol, we resolve it directly without
1069 creating a procedure linkage table entry. */
1070 if (h != NULL)
1071 {
1072 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1073 h->plt.refcount += 1;
1074 }
1075 break;
1076
1077 case R_390_GOTPLT12:
1078 case R_390_GOTPLT16:
1079 case R_390_GOTPLT20:
1080 case R_390_GOTPLT32:
1081 case R_390_GOTPLTENT:
1082 /* This symbol requires either a procedure linkage table entry
1083 or an entry in the local got. We actually build the entry
1084 in adjust_dynamic_symbol because whether this is really a
1085 global reference can change and with it the fact if we have
1086 to create a plt entry or a local got entry. To be able to
1087 make a once global symbol a local one we have to keep track
1088 of the number of gotplt references that exist for this
1089 symbol. */
1090 if (h != NULL)
1091 {
1092 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1093 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_PLT;
1094 h->plt.refcount += 1;
1095 }
1096 else
1097 local_got_refcounts[r_symndx] += 1;
1098 break;
1099
1100 case R_390_TLS_LDM32:
1101 htab->tls_ldm_got.refcount += 1;
1102 break;
1103
1104 case R_390_TLS_IE32:
1105 case R_390_TLS_GOTIE12:
1106 case R_390_TLS_GOTIE20:
1107 case R_390_TLS_GOTIE32:
1108 case R_390_TLS_IEENT:
1109 if (info->shared)
1110 info->flags |= DF_STATIC_TLS;
1111 /* Fall through. */
1112
1113 case R_390_GOT12:
1114 case R_390_GOT16:
1115 case R_390_GOT20:
1116 case R_390_GOT32:
1117 case R_390_GOTENT:
1118 case R_390_TLS_GD32:
1119 /* This symbol requires a global offset table entry. */
1120 switch (r_type)
1121 {
1122 default:
1123 case R_390_GOT12:
1124 case R_390_GOT16:
1125 case R_390_GOT20:
1126 case R_390_GOT32:
1127 case R_390_GOTENT:
1128 tls_type = GOT_NORMAL;
1129 break;
1130 case R_390_TLS_GD32:
1131 tls_type = GOT_TLS_GD;
1132 break;
1133 case R_390_TLS_IE32:
1134 case R_390_TLS_GOTIE32:
1135 tls_type = GOT_TLS_IE;
1136 break;
1137 case R_390_TLS_GOTIE12:
1138 case R_390_TLS_GOTIE20:
1139 case R_390_TLS_IEENT:
1140 tls_type = GOT_TLS_IE_NLT;
1141 break;
1142 }
1143
1144 if (h != NULL)
1145 {
1146 h->got.refcount += 1;
1147 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1148 }
1149 else
1150 {
1151 local_got_refcounts[r_symndx] += 1;
1152 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1153 }
1154 /* If a TLS symbol is accessed using IE at least once,
1155 there is no point to use dynamic model for it. */
1156 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1157 {
1158 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1159 {
1160 (*_bfd_error_handler)
1161 (_("%s: `%s' accessed both as normal and thread local symbol"),
1162 bfd_archive_filename (abfd), h->root.root.string);
1163 return FALSE;
1164 }
1165 if (old_tls_type > tls_type)
1166 tls_type = old_tls_type;
1167 }
1168
1169 if (old_tls_type != tls_type)
1170 {
1171 if (h != NULL)
1172 elf_s390_hash_entry (h)->tls_type = tls_type;
1173 else
1174 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1175 }
1176
1177 if (r_type != R_390_TLS_IE32)
1178 break;
1179 /* Fall through. */
1180
1181 case R_390_TLS_LE32:
1182 if (!info->shared)
1183 break;
1184 info->flags |= DF_STATIC_TLS;
1185 /* Fall through. */
1186
1187 case R_390_8:
1188 case R_390_16:
1189 case R_390_32:
1190 case R_390_PC16:
1191 case R_390_PC16DBL:
1192 case R_390_PC32DBL:
1193 case R_390_PC32:
1194 if (h != NULL && !info->shared)
1195 {
1196 /* If this reloc is in a read-only section, we might
1197 need a copy reloc. We can't check reliably at this
1198 stage whether the section is read-only, as input
1199 sections have not yet been mapped to output sections.
1200 Tentatively set the flag for now, and correct in
1201 adjust_dynamic_symbol. */
1202 h->elf_link_hash_flags |= ELF_LINK_NON_GOT_REF;
1203
1204 /* We may need a .plt entry if the function this reloc
1205 refers to is in a shared lib. */
1206 h->plt.refcount += 1;
1207 }
1208
1209 /* If we are creating a shared library, and this is a reloc
1210 against a global symbol, or a non PC relative reloc
1211 against a local symbol, then we need to copy the reloc
1212 into the shared library. However, if we are linking with
1213 -Bsymbolic, we do not need to copy a reloc against a
1214 global symbol which is defined in an object we are
1215 including in the link (i.e., DEF_REGULAR is set). At
1216 this point we have not seen all the input files, so it is
1217 possible that DEF_REGULAR is not set now but will be set
1218 later (it is never cleared). In case of a weak definition,
1219 DEF_REGULAR may be cleared later by a strong definition in
1220 a shared library. We account for that possibility below by
1221 storing information in the relocs_copied field of the hash
1222 table entry. A similar situation occurs when creating
1223 shared libraries and symbol visibility changes render the
1224 symbol local.
1225
1226 If on the other hand, we are creating an executable, we
1227 may need to keep relocations for symbols satisfied by a
1228 dynamic library if we manage to avoid copy relocs for the
1229 symbol. */
1230 if ((info->shared
1231 && (sec->flags & SEC_ALLOC) != 0
1232 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1233 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1234 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1235 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1236 || (h != NULL
1237 && (! info->symbolic
1238 || h->root.type == bfd_link_hash_defweak
1239 || (h->elf_link_hash_flags
1240 & ELF_LINK_HASH_DEF_REGULAR) == 0))))
1241 || (ELIMINATE_COPY_RELOCS
1242 && !info->shared
1243 && (sec->flags & SEC_ALLOC) != 0
1244 && h != NULL
1245 && (h->root.type == bfd_link_hash_defweak
1246 || (h->elf_link_hash_flags
1247 & ELF_LINK_HASH_DEF_REGULAR) == 0)))
1248 {
1249 struct elf_s390_dyn_relocs *p;
1250 struct elf_s390_dyn_relocs **head;
1251
1252 /* We must copy these reloc types into the output file.
1253 Create a reloc section in dynobj and make room for
1254 this reloc. */
1255 if (sreloc == NULL)
1256 {
1257 const char *name;
1258 bfd *dynobj;
1259
1260 name = (bfd_elf_string_from_elf_section
1261 (abfd,
1262 elf_elfheader (abfd)->e_shstrndx,
1263 elf_section_data (sec)->rel_hdr.sh_name));
1264 if (name == NULL)
1265 return FALSE;
1266
1267 if (strncmp (name, ".rela", 5) != 0
1268 || strcmp (bfd_get_section_name (abfd, sec),
1269 name + 5) != 0)
1270 {
1271 (*_bfd_error_handler)
1272 (_("%s: bad relocation section name `%s\'"),
1273 bfd_archive_filename (abfd), name);
1274 }
1275
1276 if (htab->elf.dynobj == NULL)
1277 htab->elf.dynobj = abfd;
1278
1279 dynobj = htab->elf.dynobj;
1280 sreloc = bfd_get_section_by_name (dynobj, name);
1281 if (sreloc == NULL)
1282 {
1283 flagword flags;
1284
1285 sreloc = bfd_make_section (dynobj, name);
1286 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1287 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1288 if ((sec->flags & SEC_ALLOC) != 0)
1289 flags |= SEC_ALLOC | SEC_LOAD;
1290 if (sreloc == NULL
1291 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1292 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1293 return FALSE;
1294 }
1295 elf_section_data (sec)->sreloc = sreloc;
1296 }
1297
1298 /* If this is a global symbol, we count the number of
1299 relocations we need for this symbol. */
1300 if (h != NULL)
1301 {
1302 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1303 }
1304 else
1305 {
1306 /* Track dynamic relocs needed for local syms too.
1307 We really need local syms available to do this
1308 easily. Oh well. */
1309 asection *s;
1310
1311 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1312 sec, r_symndx);
1313 if (s == NULL)
1314 return FALSE;
1315
1316 head = ((struct elf_s390_dyn_relocs **)
1317 &elf_section_data (s)->local_dynrel);
1318 }
1319
1320 p = *head;
1321 if (p == NULL || p->sec != sec)
1322 {
1323 bfd_size_type amt = sizeof *p;
1324
1325 p = ((struct elf_s390_dyn_relocs *)
1326 bfd_alloc (htab->elf.dynobj, amt));
1327 if (p == NULL)
1328 return FALSE;
1329 p->next = *head;
1330 *head = p;
1331 p->sec = sec;
1332 p->count = 0;
1333 p->pc_count = 0;
1334 }
1335
1336 p->count += 1;
1337 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1338 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1339 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1340 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1341 p->pc_count += 1;
1342 }
1343 break;
1344
1345 /* This relocation describes the C++ object vtable hierarchy.
1346 Reconstruct it for later use during GC. */
1347 case R_390_GNU_VTINHERIT:
1348 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1349 return FALSE;
1350 break;
1351
1352 /* This relocation describes which C++ vtable entries are actually
1353 used. Record for later use during GC. */
1354 case R_390_GNU_VTENTRY:
1355 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1356 return FALSE;
1357 break;
1358
1359 default:
1360 break;
1361 }
1362 }
1363
1364 return TRUE;
1365 }
1366
1367 /* Return the section that should be marked against GC for a given
1368 relocation. */
1369
1370 static asection *
1371 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1372 asection *sec;
1373 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1374 Elf_Internal_Rela *rel;
1375 struct elf_link_hash_entry *h;
1376 Elf_Internal_Sym *sym;
1377 {
1378 if (h != NULL)
1379 {
1380 switch (ELF32_R_TYPE (rel->r_info))
1381 {
1382 case R_390_GNU_VTINHERIT:
1383 case R_390_GNU_VTENTRY:
1384 break;
1385
1386 default:
1387 switch (h->root.type)
1388 {
1389 case bfd_link_hash_defined:
1390 case bfd_link_hash_defweak:
1391 return h->root.u.def.section;
1392
1393 case bfd_link_hash_common:
1394 return h->root.u.c.p->section;
1395
1396 default:
1397 break;
1398 }
1399 }
1400 }
1401 else
1402 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1403
1404 return NULL;
1405 }
1406
1407 /* Update the got entry reference counts for the section being removed. */
1408
1409 static bfd_boolean
1410 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1411 bfd *abfd;
1412 struct bfd_link_info *info;
1413 asection *sec;
1414 const Elf_Internal_Rela *relocs;
1415 {
1416 Elf_Internal_Shdr *symtab_hdr;
1417 struct elf_link_hash_entry **sym_hashes;
1418 bfd_signed_vma *local_got_refcounts;
1419 const Elf_Internal_Rela *rel, *relend;
1420
1421 elf_section_data (sec)->local_dynrel = NULL;
1422
1423 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1424 sym_hashes = elf_sym_hashes (abfd);
1425 local_got_refcounts = elf_local_got_refcounts (abfd);
1426
1427 relend = relocs + sec->reloc_count;
1428 for (rel = relocs; rel < relend; rel++)
1429 {
1430 unsigned long r_symndx;
1431 unsigned int r_type;
1432 struct elf_link_hash_entry *h = NULL;
1433
1434 r_symndx = ELF32_R_SYM (rel->r_info);
1435 if (r_symndx >= symtab_hdr->sh_info)
1436 {
1437 struct elf_s390_link_hash_entry *eh;
1438 struct elf_s390_dyn_relocs **pp;
1439 struct elf_s390_dyn_relocs *p;
1440
1441 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1442 eh = (struct elf_s390_link_hash_entry *) h;
1443
1444 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1445 if (p->sec == sec)
1446 {
1447 /* Everything must go for SEC. */
1448 *pp = p->next;
1449 break;
1450 }
1451 }
1452
1453 r_type = ELF32_R_TYPE (rel->r_info);
1454 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1455 switch (r_type)
1456 {
1457 case R_390_TLS_LDM32:
1458 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1459 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1460 break;
1461
1462 case R_390_TLS_GD32:
1463 case R_390_TLS_IE32:
1464 case R_390_TLS_GOTIE12:
1465 case R_390_TLS_GOTIE20:
1466 case R_390_TLS_GOTIE32:
1467 case R_390_TLS_IEENT:
1468 case R_390_GOT12:
1469 case R_390_GOT16:
1470 case R_390_GOT20:
1471 case R_390_GOT32:
1472 case R_390_GOTOFF16:
1473 case R_390_GOTOFF32:
1474 case R_390_GOTPC:
1475 case R_390_GOTPCDBL:
1476 case R_390_GOTENT:
1477 if (h != NULL)
1478 {
1479 if (h->got.refcount > 0)
1480 h->got.refcount -= 1;
1481 }
1482 else if (local_got_refcounts != NULL)
1483 {
1484 if (local_got_refcounts[r_symndx] > 0)
1485 local_got_refcounts[r_symndx] -= 1;
1486 }
1487 break;
1488
1489 case R_390_8:
1490 case R_390_12:
1491 case R_390_16:
1492 case R_390_20:
1493 case R_390_32:
1494 case R_390_PC16:
1495 case R_390_PC16DBL:
1496 case R_390_PC32DBL:
1497 case R_390_PC32:
1498 if (info->shared)
1499 break;
1500 /* Fall through. */
1501
1502 case R_390_PLT16DBL:
1503 case R_390_PLT32DBL:
1504 case R_390_PLT32:
1505 case R_390_PLTOFF16:
1506 case R_390_PLTOFF32:
1507 if (h != NULL)
1508 {
1509 if (h->plt.refcount > 0)
1510 h->plt.refcount -= 1;
1511 }
1512 break;
1513
1514 case R_390_GOTPLT12:
1515 case R_390_GOTPLT16:
1516 case R_390_GOTPLT20:
1517 case R_390_GOTPLT32:
1518 case R_390_GOTPLTENT:
1519 if (h != NULL)
1520 {
1521 if (h->plt.refcount > 0)
1522 {
1523 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1524 h->plt.refcount -= 1;
1525 }
1526 }
1527 else if (local_got_refcounts != NULL)
1528 {
1529 if (local_got_refcounts[r_symndx] > 0)
1530 local_got_refcounts[r_symndx] -= 1;
1531 }
1532 break;
1533
1534 default:
1535 break;
1536 }
1537 }
1538
1539 return TRUE;
1540 }
1541
1542 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1543 entry but we found we will not create any. Called when we find we will
1544 not have any PLT for this symbol, by for example
1545 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1546 or elf_s390_size_dynamic_sections if no dynamic sections will be
1547 created (we're only linking static objects). */
1548
1549 static void
1550 elf_s390_adjust_gotplt (h)
1551 struct elf_s390_link_hash_entry *h;
1552 {
1553 if (h->elf.root.type == bfd_link_hash_warning)
1554 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1555
1556 if (h->gotplt_refcount <= 0)
1557 return;
1558
1559 /* We simply add the number of gotplt references to the number
1560 * of got references for this symbol. */
1561 h->elf.got.refcount += h->gotplt_refcount;
1562 h->gotplt_refcount = -1;
1563 }
1564
1565 /* Adjust a symbol defined by a dynamic object and referenced by a
1566 regular object. The current definition is in some section of the
1567 dynamic object, but we're not including those sections. We have to
1568 change the definition to something the rest of the link can
1569 understand. */
1570
1571 static bfd_boolean
1572 elf_s390_adjust_dynamic_symbol (info, h)
1573 struct bfd_link_info *info;
1574 struct elf_link_hash_entry *h;
1575 {
1576 struct elf_s390_link_hash_table *htab;
1577 asection *s;
1578 unsigned int power_of_two;
1579
1580 /* If this is a function, put it in the procedure linkage table. We
1581 will fill in the contents of the procedure linkage table later
1582 (although we could actually do it here). */
1583 if (h->type == STT_FUNC
1584 || (h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_PLT) != 0)
1585 {
1586 if (h->plt.refcount <= 0
1587 || (! info->shared
1588 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) == 0
1589 && (h->elf_link_hash_flags & ELF_LINK_HASH_REF_DYNAMIC) == 0
1590 && h->root.type != bfd_link_hash_undefweak
1591 && h->root.type != bfd_link_hash_undefined))
1592 {
1593 /* This case can occur if we saw a PLT32 reloc in an input
1594 file, but the symbol was never referred to by a dynamic
1595 object, or if all references were garbage collected. In
1596 such a case, we don't actually need to build a procedure
1597 linkage table, and we can just do a PC32 reloc instead. */
1598 h->plt.offset = (bfd_vma) -1;
1599 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1600 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1601 }
1602
1603 return TRUE;
1604 }
1605 else
1606 /* It's possible that we incorrectly decided a .plt reloc was
1607 needed for an R_390_PC32 reloc to a non-function sym in
1608 check_relocs. We can't decide accurately between function and
1609 non-function syms in check-relocs; Objects loaded later in
1610 the link may change h->type. So fix it now. */
1611 h->plt.offset = (bfd_vma) -1;
1612
1613 /* If this is a weak symbol, and there is a real definition, the
1614 processor independent code will have arranged for us to see the
1615 real definition first, and we can just use the same value. */
1616 if (h->weakdef != NULL)
1617 {
1618 BFD_ASSERT (h->weakdef->root.type == bfd_link_hash_defined
1619 || h->weakdef->root.type == bfd_link_hash_defweak);
1620 h->root.u.def.section = h->weakdef->root.u.def.section;
1621 h->root.u.def.value = h->weakdef->root.u.def.value;
1622 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1623 h->elf_link_hash_flags
1624 = ((h->elf_link_hash_flags & ~ELF_LINK_NON_GOT_REF)
1625 | (h->weakdef->elf_link_hash_flags & ELF_LINK_NON_GOT_REF));
1626 return TRUE;
1627 }
1628
1629 /* This is a reference to a symbol defined by a dynamic object which
1630 is not a function. */
1631
1632 /* If we are creating a shared library, we must presume that the
1633 only references to the symbol are via the global offset table.
1634 For such cases we need not do anything here; the relocations will
1635 be handled correctly by relocate_section. */
1636 if (info->shared)
1637 return TRUE;
1638
1639 /* If there are no references to this symbol that do not use the
1640 GOT, we don't need to generate a copy reloc. */
1641 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0)
1642 return TRUE;
1643
1644 /* If -z nocopyreloc was given, we won't generate them either. */
1645 if (info->nocopyreloc)
1646 {
1647 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1648 return TRUE;
1649 }
1650
1651 if (ELIMINATE_COPY_RELOCS)
1652 {
1653 struct elf_s390_link_hash_entry * eh;
1654 struct elf_s390_dyn_relocs *p;
1655
1656 eh = (struct elf_s390_link_hash_entry *) h;
1657 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1658 {
1659 s = p->sec->output_section;
1660 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1661 break;
1662 }
1663
1664 /* If we didn't find any dynamic relocs in read-only sections, then
1665 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1666 if (p == NULL)
1667 {
1668 h->elf_link_hash_flags &= ~ELF_LINK_NON_GOT_REF;
1669 return TRUE;
1670 }
1671 }
1672
1673 /* We must allocate the symbol in our .dynbss section, which will
1674 become part of the .bss section of the executable. There will be
1675 an entry for this symbol in the .dynsym section. The dynamic
1676 object will contain position independent code, so all references
1677 from the dynamic object to this symbol will go through the global
1678 offset table. The dynamic linker will use the .dynsym entry to
1679 determine the address it must put in the global offset table, so
1680 both the dynamic object and the regular object will refer to the
1681 same memory location for the variable. */
1682
1683 htab = elf_s390_hash_table (info);
1684
1685 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1686 copy the initial value out of the dynamic object and into the
1687 runtime process image. */
1688 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1689 {
1690 htab->srelbss->_raw_size += sizeof (Elf32_External_Rela);
1691 h->elf_link_hash_flags |= ELF_LINK_HASH_NEEDS_COPY;
1692 }
1693
1694 /* We need to figure out the alignment required for this symbol. I
1695 have no idea how ELF linkers handle this. */
1696 power_of_two = bfd_log2 (h->size);
1697 if (power_of_two > 3)
1698 power_of_two = 3;
1699
1700 /* Apply the required alignment. */
1701 s = htab->sdynbss;
1702 s->_raw_size = BFD_ALIGN (s->_raw_size, (bfd_size_type) (1 << power_of_two));
1703 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1704 {
1705 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1706 return FALSE;
1707 }
1708
1709 /* Define the symbol as being at this point in the section. */
1710 h->root.u.def.section = s;
1711 h->root.u.def.value = s->_raw_size;
1712
1713 /* Increment the section size to make room for the symbol. */
1714 s->_raw_size += h->size;
1715
1716 return TRUE;
1717 }
1718
1719 /* Allocate space in .plt, .got and associated reloc sections for
1720 dynamic relocs. */
1721
1722 static bfd_boolean
1723 allocate_dynrelocs (h, inf)
1724 struct elf_link_hash_entry *h;
1725 PTR inf;
1726 {
1727 struct bfd_link_info *info;
1728 struct elf_s390_link_hash_table *htab;
1729 struct elf_s390_link_hash_entry *eh;
1730 struct elf_s390_dyn_relocs *p;
1731
1732 if (h->root.type == bfd_link_hash_indirect)
1733 return TRUE;
1734
1735 if (h->root.type == bfd_link_hash_warning)
1736 /* When warning symbols are created, they **replace** the "real"
1737 entry in the hash table, thus we never get to see the real
1738 symbol in a hash traversal. So look at it now. */
1739 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1740
1741 info = (struct bfd_link_info *) inf;
1742 htab = elf_s390_hash_table (info);
1743
1744 if (htab->elf.dynamic_sections_created
1745 && h->plt.refcount > 0
1746 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1747 || h->root.type != bfd_link_hash_undefweak))
1748 {
1749 /* Make sure this symbol is output as a dynamic symbol.
1750 Undefined weak syms won't yet be marked as dynamic. */
1751 if (h->dynindx == -1
1752 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1753 {
1754 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1755 return FALSE;
1756 }
1757
1758 if (info->shared
1759 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1760 {
1761 asection *s = htab->splt;
1762
1763 /* If this is the first .plt entry, make room for the special
1764 first entry. */
1765 if (s->_raw_size == 0)
1766 s->_raw_size += PLT_FIRST_ENTRY_SIZE;
1767
1768 h->plt.offset = s->_raw_size;
1769
1770 /* If this symbol is not defined in a regular file, and we are
1771 not generating a shared library, then set the symbol to this
1772 location in the .plt. This is required to make function
1773 pointers compare as equal between the normal executable and
1774 the shared library. */
1775 if (! info->shared
1776 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1777 {
1778 h->root.u.def.section = s;
1779 h->root.u.def.value = h->plt.offset;
1780 }
1781
1782 /* Make room for this entry. */
1783 s->_raw_size += PLT_ENTRY_SIZE;
1784
1785 /* We also need to make an entry in the .got.plt section, which
1786 will be placed in the .got section by the linker script. */
1787 htab->sgotplt->_raw_size += GOT_ENTRY_SIZE;
1788
1789 /* We also need to make an entry in the .rela.plt section. */
1790 htab->srelplt->_raw_size += sizeof (Elf32_External_Rela);
1791 }
1792 else
1793 {
1794 h->plt.offset = (bfd_vma) -1;
1795 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1796 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1797 }
1798 }
1799 else
1800 {
1801 h->plt.offset = (bfd_vma) -1;
1802 h->elf_link_hash_flags &= ~ELF_LINK_HASH_NEEDS_PLT;
1803 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1804 }
1805
1806 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1807 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1808 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1809 we can save the dynamic TLS relocation. */
1810 if (h->got.refcount > 0
1811 && !info->shared
1812 && h->dynindx == -1
1813 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1814 {
1815 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1816 /* For the GOTIE access without a literal pool entry the offset has
1817 to be stored somewhere. The immediate value in the instruction
1818 is not bit enough so the value is stored in the got. */
1819 {
1820 h->got.offset = htab->sgot->_raw_size;
1821 htab->sgot->_raw_size += GOT_ENTRY_SIZE;
1822 }
1823 else
1824 h->got.offset = (bfd_vma) -1;
1825 }
1826 else if (h->got.refcount > 0)
1827 {
1828 asection *s;
1829 bfd_boolean dyn;
1830 int tls_type = elf_s390_hash_entry(h)->tls_type;
1831
1832 /* Make sure this symbol is output as a dynamic symbol.
1833 Undefined weak syms won't yet be marked as dynamic. */
1834 if (h->dynindx == -1
1835 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1836 {
1837 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1838 return FALSE;
1839 }
1840
1841 s = htab->sgot;
1842 h->got.offset = s->_raw_size;
1843 s->_raw_size += GOT_ENTRY_SIZE;
1844 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1845 if (tls_type == GOT_TLS_GD)
1846 s->_raw_size += GOT_ENTRY_SIZE;
1847 dyn = htab->elf.dynamic_sections_created;
1848 /* R_390_TLS_IE32 needs one dynamic relocation,
1849 R_390_TLS_GD32 needs one if local symbol and two if global. */
1850 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1851 || tls_type >= GOT_TLS_IE)
1852 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1853 else if (tls_type == GOT_TLS_GD)
1854 htab->srelgot->_raw_size += 2 * sizeof (Elf32_External_Rela);
1855 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1856 || h->root.type != bfd_link_hash_undefweak)
1857 && (info->shared
1858 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1859 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
1860 }
1861 else
1862 h->got.offset = (bfd_vma) -1;
1863
1864 eh = (struct elf_s390_link_hash_entry *) h;
1865 if (eh->dyn_relocs == NULL)
1866 return TRUE;
1867
1868 /* In the shared -Bsymbolic case, discard space allocated for
1869 dynamic pc-relative relocs against symbols which turn out to be
1870 defined in regular objects. For the normal shared case, discard
1871 space for pc-relative relocs that have become local due to symbol
1872 visibility changes. */
1873
1874 if (info->shared)
1875 {
1876 if (SYMBOL_REFERENCES_LOCAL (info, h))
1877 {
1878 struct elf_s390_dyn_relocs **pp;
1879
1880 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1881 {
1882 p->count -= p->pc_count;
1883 p->pc_count = 0;
1884 if (p->count == 0)
1885 *pp = p->next;
1886 else
1887 pp = &p->next;
1888 }
1889 }
1890
1891 /* Also discard relocs on undefined weak syms with non-default
1892 visibility. */
1893 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1894 && h->root.type == bfd_link_hash_undefweak)
1895 eh->dyn_relocs = NULL;
1896 }
1897 else if (ELIMINATE_COPY_RELOCS)
1898 {
1899 /* For the non-shared case, discard space for relocs against
1900 symbols which turn out to need copy relocs or are not
1901 dynamic. */
1902
1903 if ((h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
1904 && (((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0
1905 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
1906 || (htab->elf.dynamic_sections_created
1907 && (h->root.type == bfd_link_hash_undefweak
1908 || h->root.type == bfd_link_hash_undefined))))
1909 {
1910 /* Make sure this symbol is output as a dynamic symbol.
1911 Undefined weak syms won't yet be marked as dynamic. */
1912 if (h->dynindx == -1
1913 && (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL) == 0)
1914 {
1915 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1916 return FALSE;
1917 }
1918
1919 /* If that succeeded, we know we'll be keeping all the
1920 relocs. */
1921 if (h->dynindx != -1)
1922 goto keep;
1923 }
1924
1925 eh->dyn_relocs = NULL;
1926
1927 keep: ;
1928 }
1929
1930 /* Finally, allocate space. */
1931 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1932 {
1933 asection *sreloc = elf_section_data (p->sec)->sreloc;
1934
1935 sreloc->_raw_size += p->count * sizeof (Elf32_External_Rela);
1936 }
1937
1938 return TRUE;
1939 }
1940
1941 /* Find any dynamic relocs that apply to read-only sections. */
1942
1943 static bfd_boolean
1944 readonly_dynrelocs (h, inf)
1945 struct elf_link_hash_entry *h;
1946 PTR inf;
1947 {
1948 struct elf_s390_link_hash_entry *eh;
1949 struct elf_s390_dyn_relocs *p;
1950
1951 if (h->root.type == bfd_link_hash_warning)
1952 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1953
1954 eh = (struct elf_s390_link_hash_entry *) h;
1955 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1956 {
1957 asection *s = p->sec->output_section;
1958
1959 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1960 {
1961 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1962
1963 info->flags |= DF_TEXTREL;
1964
1965 /* Not an error, just cut short the traversal. */
1966 return FALSE;
1967 }
1968 }
1969 return TRUE;
1970 }
1971
1972 /* Set the sizes of the dynamic sections. */
1973
1974 static bfd_boolean
1975 elf_s390_size_dynamic_sections (output_bfd, info)
1976 bfd *output_bfd ATTRIBUTE_UNUSED;
1977 struct bfd_link_info *info;
1978 {
1979 struct elf_s390_link_hash_table *htab;
1980 bfd *dynobj;
1981 asection *s;
1982 bfd_boolean relocs;
1983 bfd *ibfd;
1984
1985 htab = elf_s390_hash_table (info);
1986 dynobj = htab->elf.dynobj;
1987 if (dynobj == NULL)
1988 abort ();
1989
1990 if (htab->elf.dynamic_sections_created)
1991 {
1992 /* Set the contents of the .interp section to the interpreter. */
1993 if (info->executable)
1994 {
1995 s = bfd_get_section_by_name (dynobj, ".interp");
1996 if (s == NULL)
1997 abort ();
1998 s->_raw_size = sizeof ELF_DYNAMIC_INTERPRETER;
1999 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2000 }
2001 }
2002
2003 /* Set up .got offsets for local syms, and space for local dynamic
2004 relocs. */
2005 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2006 {
2007 bfd_signed_vma *local_got;
2008 bfd_signed_vma *end_local_got;
2009 char *local_tls_type;
2010 bfd_size_type locsymcount;
2011 Elf_Internal_Shdr *symtab_hdr;
2012 asection *srela;
2013
2014 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2015 continue;
2016
2017 for (s = ibfd->sections; s != NULL; s = s->next)
2018 {
2019 struct elf_s390_dyn_relocs *p;
2020
2021 for (p = *((struct elf_s390_dyn_relocs **)
2022 &elf_section_data (s)->local_dynrel);
2023 p != NULL;
2024 p = p->next)
2025 {
2026 if (!bfd_is_abs_section (p->sec)
2027 && bfd_is_abs_section (p->sec->output_section))
2028 {
2029 /* Input section has been discarded, either because
2030 it is a copy of a linkonce section or due to
2031 linker script /DISCARD/, so we'll be discarding
2032 the relocs too. */
2033 }
2034 else if (p->count != 0)
2035 {
2036 srela = elf_section_data (p->sec)->sreloc;
2037 srela->_raw_size += p->count * sizeof (Elf32_External_Rela);
2038 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2039 info->flags |= DF_TEXTREL;
2040 }
2041 }
2042 }
2043
2044 local_got = elf_local_got_refcounts (ibfd);
2045 if (!local_got)
2046 continue;
2047
2048 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2049 locsymcount = symtab_hdr->sh_info;
2050 end_local_got = local_got + locsymcount;
2051 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2052 s = htab->sgot;
2053 srela = htab->srelgot;
2054 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2055 {
2056 if (*local_got > 0)
2057 {
2058 *local_got = s->_raw_size;
2059 s->_raw_size += GOT_ENTRY_SIZE;
2060 if (*local_tls_type == GOT_TLS_GD)
2061 s->_raw_size += GOT_ENTRY_SIZE;
2062 if (info->shared)
2063 srela->_raw_size += sizeof (Elf32_External_Rela);
2064 }
2065 else
2066 *local_got = (bfd_vma) -1;
2067 }
2068 }
2069
2070 if (htab->tls_ldm_got.refcount > 0)
2071 {
2072 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2073 relocs. */
2074 htab->tls_ldm_got.offset = htab->sgot->_raw_size;
2075 htab->sgot->_raw_size += 2 * GOT_ENTRY_SIZE;
2076 htab->srelgot->_raw_size += sizeof (Elf32_External_Rela);
2077 }
2078 else
2079 htab->tls_ldm_got.offset = -1;
2080
2081 /* Allocate global sym .plt and .got entries, and space for global
2082 sym dynamic relocs. */
2083 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2084
2085 /* We now have determined the sizes of the various dynamic sections.
2086 Allocate memory for them. */
2087 relocs = FALSE;
2088 for (s = dynobj->sections; s != NULL; s = s->next)
2089 {
2090 if ((s->flags & SEC_LINKER_CREATED) == 0)
2091 continue;
2092
2093 if (s == htab->splt
2094 || s == htab->sgot
2095 || s == htab->sgotplt)
2096 {
2097 /* Strip this section if we don't need it; see the
2098 comment below. */
2099 }
2100 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2101 {
2102 if (s->_raw_size != 0)
2103 relocs = TRUE;
2104
2105 /* We use the reloc_count field as a counter if we need
2106 to copy relocs into the output file. */
2107 s->reloc_count = 0;
2108 }
2109 else
2110 {
2111 /* It's not one of our sections, so don't allocate space. */
2112 continue;
2113 }
2114
2115 if (s->_raw_size == 0)
2116 {
2117 /* If we don't need this section, strip it from the
2118 output file. This is to handle .rela.bss and
2119 .rela.plt. We must create it in
2120 create_dynamic_sections, because it must be created
2121 before the linker maps input sections to output
2122 sections. The linker does that before
2123 adjust_dynamic_symbol is called, and it is that
2124 function which decides whether anything needs to go
2125 into these sections. */
2126
2127 _bfd_strip_section_from_output (info, s);
2128 continue;
2129 }
2130
2131 /* Allocate memory for the section contents. We use bfd_zalloc
2132 here in case unused entries are not reclaimed before the
2133 section's contents are written out. This should not happen,
2134 but this way if it does, we get a R_390_NONE reloc instead
2135 of garbage. */
2136 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->_raw_size);
2137 if (s->contents == NULL)
2138 return FALSE;
2139 }
2140
2141 if (htab->elf.dynamic_sections_created)
2142 {
2143 /* Add some entries to the .dynamic section. We fill in the
2144 values later, in elf_s390_finish_dynamic_sections, but we
2145 must add the entries now so that we get the correct size for
2146 the .dynamic section. The DT_DEBUG entry is filled in by the
2147 dynamic linker and used by the debugger. */
2148 #define add_dynamic_entry(TAG, VAL) \
2149 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2150
2151 if (info->executable)
2152 {
2153 if (!add_dynamic_entry (DT_DEBUG, 0))
2154 return FALSE;
2155 }
2156
2157 if (htab->splt->_raw_size != 0)
2158 {
2159 if (!add_dynamic_entry (DT_PLTGOT, 0)
2160 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2161 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2162 || !add_dynamic_entry (DT_JMPREL, 0))
2163 return FALSE;
2164 }
2165
2166 if (relocs)
2167 {
2168 if (!add_dynamic_entry (DT_RELA, 0)
2169 || !add_dynamic_entry (DT_RELASZ, 0)
2170 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2171 return FALSE;
2172
2173 /* If any dynamic relocs apply to a read-only section,
2174 then we need a DT_TEXTREL entry. */
2175 if ((info->flags & DF_TEXTREL) == 0)
2176 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2177 (PTR) info);
2178
2179 if ((info->flags & DF_TEXTREL) != 0)
2180 {
2181 if (!add_dynamic_entry (DT_TEXTREL, 0))
2182 return FALSE;
2183 }
2184 }
2185 }
2186 #undef add_dynamic_entry
2187
2188 return TRUE;
2189 }
2190
2191 /* Return the base VMA address which should be subtracted from real addresses
2192 when resolving @dtpoff relocation.
2193 This is PT_TLS segment p_vaddr. */
2194
2195 static bfd_vma
2196 dtpoff_base (info)
2197 struct bfd_link_info *info;
2198 {
2199 /* If tls_sec is NULL, we should have signalled an error already. */
2200 if (elf_hash_table (info)->tls_sec == NULL)
2201 return 0;
2202 return elf_hash_table (info)->tls_sec->vma;
2203 }
2204
2205 /* Return the relocation value for @tpoff relocation
2206 if STT_TLS virtual address is ADDRESS. */
2207
2208 static bfd_vma
2209 tpoff (info, address)
2210 struct bfd_link_info *info;
2211 bfd_vma address;
2212 {
2213 struct elf_link_hash_table *htab = elf_hash_table (info);
2214
2215 /* If tls_sec is NULL, we should have signalled an error already. */
2216 if (htab->tls_sec == NULL)
2217 return 0;
2218 return htab->tls_size + htab->tls_sec->vma - address;
2219 }
2220
2221 /* Complain if TLS instruction relocation is against an invalid
2222 instruction. */
2223
2224 static void
2225 invalid_tls_insn (input_bfd, input_section, rel)
2226 bfd *input_bfd;
2227 asection *input_section;
2228 Elf_Internal_Rela *rel;
2229 {
2230 reloc_howto_type *howto;
2231
2232 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2233 (*_bfd_error_handler)
2234 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
2235 bfd_archive_filename (input_bfd),
2236 bfd_get_section_name (input_bfd, input_section),
2237 (long) rel->r_offset,
2238 howto->name);
2239 }
2240
2241 /* Relocate a 390 ELF section. */
2242
2243 static bfd_boolean
2244 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2245 contents, relocs, local_syms, local_sections)
2246 bfd *output_bfd;
2247 struct bfd_link_info *info;
2248 bfd *input_bfd;
2249 asection *input_section;
2250 bfd_byte *contents;
2251 Elf_Internal_Rela *relocs;
2252 Elf_Internal_Sym *local_syms;
2253 asection **local_sections;
2254 {
2255 struct elf_s390_link_hash_table *htab;
2256 Elf_Internal_Shdr *symtab_hdr;
2257 struct elf_link_hash_entry **sym_hashes;
2258 bfd_vma *local_got_offsets;
2259 Elf_Internal_Rela *rel;
2260 Elf_Internal_Rela *relend;
2261
2262 if (info->relocatable)
2263 return TRUE;
2264
2265 htab = elf_s390_hash_table (info);
2266 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2267 sym_hashes = elf_sym_hashes (input_bfd);
2268 local_got_offsets = elf_local_got_offsets (input_bfd);
2269
2270 rel = relocs;
2271 relend = relocs + input_section->reloc_count;
2272 for (; rel < relend; rel++)
2273 {
2274 unsigned int r_type;
2275 reloc_howto_type *howto;
2276 unsigned long r_symndx;
2277 struct elf_link_hash_entry *h;
2278 Elf_Internal_Sym *sym;
2279 asection *sec;
2280 bfd_vma off;
2281 bfd_vma relocation;
2282 bfd_boolean unresolved_reloc;
2283 bfd_reloc_status_type r;
2284 int tls_type;
2285
2286 r_type = ELF32_R_TYPE (rel->r_info);
2287 if (r_type == (int) R_390_GNU_VTINHERIT
2288 || r_type == (int) R_390_GNU_VTENTRY)
2289 continue;
2290 if (r_type >= (int) R_390_max)
2291 {
2292 bfd_set_error (bfd_error_bad_value);
2293 return FALSE;
2294 }
2295
2296 howto = elf_howto_table + r_type;
2297 r_symndx = ELF32_R_SYM (rel->r_info);
2298
2299 /* This is a final link. */
2300 h = NULL;
2301 sym = NULL;
2302 sec = NULL;
2303 unresolved_reloc = FALSE;
2304 if (r_symndx < symtab_hdr->sh_info)
2305 {
2306 sym = local_syms + r_symndx;
2307 sec = local_sections[r_symndx];
2308 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2309 }
2310 else
2311 {
2312 bfd_boolean warned ATTRIBUTE_UNUSED;
2313
2314 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2315 r_symndx, symtab_hdr, sym_hashes,
2316 h, sec, relocation,
2317 unresolved_reloc, warned);
2318 }
2319
2320 switch (r_type)
2321 {
2322 case R_390_GOTPLT12:
2323 case R_390_GOTPLT16:
2324 case R_390_GOTPLT20:
2325 case R_390_GOTPLT32:
2326 case R_390_GOTPLTENT:
2327 /* There are three cases for a GOTPLT relocation. 1) The
2328 relocation is against the jump slot entry of a plt that
2329 will get emitted to the output file. 2) The relocation
2330 is against the jump slot of a plt entry that has been
2331 removed. elf_s390_adjust_gotplt has created a GOT entry
2332 as replacement. 3) The relocation is against a local symbol.
2333 Cases 2) and 3) are the same as the GOT relocation code
2334 so we just have to test for case 1 and fall through for
2335 the other two. */
2336 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2337 {
2338 bfd_vma plt_index;
2339
2340 /* Calc. index no.
2341 Current offset - size first entry / entry size. */
2342 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2343 PLT_ENTRY_SIZE;
2344
2345 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2346 addr & GOT addr. */
2347 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2348 unresolved_reloc = FALSE;
2349
2350 if (r_type == R_390_GOTPLTENT)
2351 relocation += htab->sgot->output_section->vma;
2352 break;
2353 }
2354 /* Fall through. */
2355
2356 case R_390_GOT12:
2357 case R_390_GOT16:
2358 case R_390_GOT20:
2359 case R_390_GOT32:
2360 case R_390_GOTENT:
2361 /* Relocation is to the entry for this symbol in the global
2362 offset table. */
2363 if (htab->sgot == NULL)
2364 abort ();
2365
2366 if (h != NULL)
2367 {
2368 bfd_boolean dyn;
2369
2370 off = h->got.offset;
2371 dyn = htab->elf.dynamic_sections_created;
2372 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2373 || (info->shared
2374 && (info->symbolic
2375 || h->dynindx == -1
2376 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
2377 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
2378 || (ELF_ST_VISIBILITY (h->other)
2379 && h->root.type == bfd_link_hash_undefweak))
2380 {
2381 /* This is actually a static link, or it is a
2382 -Bsymbolic link and the symbol is defined
2383 locally, or the symbol was forced to be local
2384 because of a version file. We must initialize
2385 this entry in the global offset table. Since the
2386 offset must always be a multiple of 2, we use the
2387 least significant bit to record whether we have
2388 initialized it already.
2389
2390 When doing a dynamic link, we create a .rel.got
2391 relocation entry to initialize the value. This
2392 is done in the finish_dynamic_symbol routine. */
2393 if ((off & 1) != 0)
2394 off &= ~1;
2395 else
2396 {
2397 bfd_put_32 (output_bfd, relocation,
2398 htab->sgot->contents + off);
2399 h->got.offset |= 1;
2400 }
2401 }
2402 else
2403 unresolved_reloc = FALSE;
2404 }
2405 else
2406 {
2407 if (local_got_offsets == NULL)
2408 abort ();
2409
2410 off = local_got_offsets[r_symndx];
2411
2412 /* The offset must always be a multiple of 4. We use
2413 the least significant bit to record whether we have
2414 already generated the necessary reloc. */
2415 if ((off & 1) != 0)
2416 off &= ~1;
2417 else
2418 {
2419 bfd_put_32 (output_bfd, relocation,
2420 htab->sgot->contents + off);
2421
2422 if (info->shared)
2423 {
2424 asection *srelgot;
2425 Elf_Internal_Rela outrel;
2426 bfd_byte *loc;
2427
2428 srelgot = htab->srelgot;
2429 if (srelgot == NULL)
2430 abort ();
2431
2432 outrel.r_offset = (htab->sgot->output_section->vma
2433 + htab->sgot->output_offset
2434 + off);
2435 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2436 outrel.r_addend = relocation;
2437 loc = srelgot->contents;
2438 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2439 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2440 }
2441
2442 local_got_offsets[r_symndx] |= 1;
2443 }
2444 }
2445
2446 if (off >= (bfd_vma) -2)
2447 abort ();
2448
2449 relocation = htab->sgot->output_offset + off;
2450
2451 /* For @GOTENT the relocation is against the offset between
2452 the instruction and the symbols entry in the GOT and not
2453 between the start of the GOT and the symbols entry. We
2454 add the vma of the GOT to get the correct value. */
2455 if ( r_type == R_390_GOTENT
2456 || r_type == R_390_GOTPLTENT)
2457 relocation += htab->sgot->output_section->vma;
2458
2459 break;
2460
2461 case R_390_GOTOFF16:
2462 case R_390_GOTOFF32:
2463 /* Relocation is relative to the start of the global offset
2464 table. */
2465
2466 /* Note that sgot->output_offset is not involved in this
2467 calculation. We always want the start of .got. If we
2468 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2469 permitted by the ABI, we might have to change this
2470 calculation. */
2471 relocation -= htab->sgot->output_section->vma;
2472 break;
2473
2474 case R_390_GOTPC:
2475 case R_390_GOTPCDBL:
2476 /* Use global offset table as symbol value. */
2477 relocation = htab->sgot->output_section->vma;
2478 unresolved_reloc = FALSE;
2479 break;
2480
2481 case R_390_PLT16DBL:
2482 case R_390_PLT32DBL:
2483 case R_390_PLT32:
2484 /* Relocation is to the entry for this symbol in the
2485 procedure linkage table. */
2486
2487 /* Resolve a PLT32 reloc against a local symbol directly,
2488 without using the procedure linkage table. */
2489 if (h == NULL)
2490 break;
2491
2492 if (h->plt.offset == (bfd_vma) -1
2493 || htab->splt == NULL)
2494 {
2495 /* We didn't make a PLT entry for this symbol. This
2496 happens when statically linking PIC code, or when
2497 using -Bsymbolic. */
2498 break;
2499 }
2500
2501 relocation = (htab->splt->output_section->vma
2502 + htab->splt->output_offset
2503 + h->plt.offset);
2504 unresolved_reloc = FALSE;
2505 break;
2506
2507 case R_390_PLTOFF16:
2508 case R_390_PLTOFF32:
2509 /* Relocation is to the entry for this symbol in the
2510 procedure linkage table relative to the start of the GOT. */
2511
2512 /* For local symbols or if we didn't make a PLT entry for
2513 this symbol resolve the symbol directly. */
2514 if ( h == NULL
2515 || h->plt.offset == (bfd_vma) -1
2516 || htab->splt == NULL)
2517 {
2518 relocation -= htab->sgot->output_section->vma;
2519 break;
2520 }
2521
2522 relocation = (htab->splt->output_section->vma
2523 + htab->splt->output_offset
2524 + h->plt.offset
2525 - htab->sgot->output_section->vma);
2526 unresolved_reloc = FALSE;
2527 break;
2528
2529 case R_390_8:
2530 case R_390_16:
2531 case R_390_32:
2532 case R_390_PC16:
2533 case R_390_PC16DBL:
2534 case R_390_PC32DBL:
2535 case R_390_PC32:
2536 /* r_symndx will be zero only for relocs against symbols
2537 from removed linkonce sections, or sections discarded by
2538 a linker script. */
2539 if (r_symndx == 0
2540 || (input_section->flags & SEC_ALLOC) == 0)
2541 break;
2542
2543 if ((info->shared
2544 && (h == NULL
2545 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2546 || h->root.type != bfd_link_hash_undefweak)
2547 && ((r_type != R_390_PC16
2548 && r_type != R_390_PC16DBL
2549 && r_type != R_390_PC32DBL
2550 && r_type != R_390_PC32)
2551 || (h != NULL
2552 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2553 || (ELIMINATE_COPY_RELOCS
2554 && !info->shared
2555 && h != NULL
2556 && h->dynindx != -1
2557 && (h->elf_link_hash_flags & ELF_LINK_NON_GOT_REF) == 0
2558 && (((h->elf_link_hash_flags
2559 & ELF_LINK_HASH_DEF_DYNAMIC) != 0
2560 && (h->elf_link_hash_flags
2561 & ELF_LINK_HASH_DEF_REGULAR) == 0)
2562 || h->root.type == bfd_link_hash_undefweak
2563 || h->root.type == bfd_link_hash_undefined)))
2564 {
2565 Elf_Internal_Rela outrel;
2566 bfd_boolean skip, relocate;
2567 asection *sreloc;
2568 bfd_byte *loc;
2569
2570 /* When generating a shared object, these relocations
2571 are copied into the output file to be resolved at run
2572 time. */
2573
2574 skip = FALSE;
2575 relocate = FALSE;
2576
2577 outrel.r_offset =
2578 _bfd_elf_section_offset (output_bfd, info, input_section,
2579 rel->r_offset);
2580 if (outrel.r_offset == (bfd_vma) -1)
2581 skip = TRUE;
2582 else if (outrel.r_offset == (bfd_vma) -2)
2583 skip = TRUE, relocate = TRUE;
2584 outrel.r_offset += (input_section->output_section->vma
2585 + input_section->output_offset);
2586
2587 if (skip)
2588 memset (&outrel, 0, sizeof outrel);
2589 else if (h != NULL
2590 && h->dynindx != -1
2591 && (r_type == R_390_PC16
2592 || r_type == R_390_PC16DBL
2593 || r_type == R_390_PC32DBL
2594 || r_type == R_390_PC32
2595 || !info->shared
2596 || !info->symbolic
2597 || (h->elf_link_hash_flags
2598 & ELF_LINK_HASH_DEF_REGULAR) == 0))
2599 {
2600 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2601 outrel.r_addend = rel->r_addend;
2602 }
2603 else
2604 {
2605 /* This symbol is local, or marked to become local. */
2606 outrel.r_addend = relocation + rel->r_addend;
2607 if (r_type == R_390_32)
2608 {
2609 relocate = TRUE;
2610 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2611 }
2612 else
2613 {
2614 long sindx;
2615
2616 if (bfd_is_abs_section (sec))
2617 sindx = 0;
2618 else if (sec == NULL || sec->owner == NULL)
2619 {
2620 bfd_set_error(bfd_error_bad_value);
2621 return FALSE;
2622 }
2623 else
2624 {
2625 asection *osec;
2626
2627 osec = sec->output_section;
2628 sindx = elf_section_data (osec)->dynindx;
2629 BFD_ASSERT (sindx > 0);
2630
2631 /* We are turning this relocation into one
2632 against a section symbol, so subtract out
2633 the output section's address but not the
2634 offset of the input section in the output
2635 section. */
2636
2637 outrel.r_addend -= osec->vma;
2638 }
2639 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2640 }
2641 }
2642
2643 sreloc = elf_section_data (input_section)->sreloc;
2644 if (sreloc == NULL)
2645 abort ();
2646
2647 loc = sreloc->contents;
2648 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2649 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2650
2651 /* If this reloc is against an external symbol, we do
2652 not want to fiddle with the addend. Otherwise, we
2653 need to include the symbol value so that it becomes
2654 an addend for the dynamic reloc. */
2655 if (! relocate)
2656 continue;
2657 }
2658 break;
2659
2660 /* Relocations for tls literal pool entries. */
2661 case R_390_TLS_IE32:
2662 if (info->shared)
2663 {
2664 Elf_Internal_Rela outrel;
2665 asection *sreloc;
2666 bfd_byte *loc;
2667
2668 outrel.r_offset = rel->r_offset
2669 + input_section->output_section->vma
2670 + input_section->output_offset;
2671 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2672 sreloc = elf_section_data (input_section)->sreloc;
2673 if (sreloc == NULL)
2674 abort ();
2675 loc = sreloc->contents;
2676 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2677 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2678 }
2679 /* Fall through. */
2680
2681 case R_390_TLS_GD32:
2682 case R_390_TLS_GOTIE32:
2683 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2684 tls_type = GOT_UNKNOWN;
2685 if (h == NULL && local_got_offsets)
2686 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2687 else if (h != NULL)
2688 {
2689 tls_type = elf_s390_hash_entry(h)->tls_type;
2690 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2691 r_type = R_390_TLS_LE32;
2692 }
2693 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2694 r_type = R_390_TLS_IE32;
2695
2696 if (r_type == R_390_TLS_LE32)
2697 {
2698 /* This relocation gets optimized away by the local exec
2699 access optimization. */
2700 BFD_ASSERT (! unresolved_reloc);
2701 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2702 contents + rel->r_offset);
2703 continue;
2704 }
2705
2706 if (htab->sgot == NULL)
2707 abort ();
2708
2709 if (h != NULL)
2710 off = h->got.offset;
2711 else
2712 {
2713 if (local_got_offsets == NULL)
2714 abort ();
2715
2716 off = local_got_offsets[r_symndx];
2717 }
2718
2719 emit_tls_relocs:
2720
2721 if ((off & 1) != 0)
2722 off &= ~1;
2723 else
2724 {
2725 Elf_Internal_Rela outrel;
2726 bfd_byte *loc;
2727 int dr_type, indx;
2728
2729 if (htab->srelgot == NULL)
2730 abort ();
2731
2732 outrel.r_offset = (htab->sgot->output_section->vma
2733 + htab->sgot->output_offset + off);
2734
2735 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2736 if (r_type == R_390_TLS_GD32)
2737 dr_type = R_390_TLS_DTPMOD;
2738 else
2739 dr_type = R_390_TLS_TPOFF;
2740 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2741 outrel.r_addend = relocation - dtpoff_base (info);
2742 else
2743 outrel.r_addend = 0;
2744 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2745 loc = htab->srelgot->contents;
2746 loc += htab->srelgot->reloc_count++
2747 * sizeof (Elf32_External_Rela);
2748 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2749
2750 if (r_type == R_390_TLS_GD32)
2751 {
2752 if (indx == 0)
2753 {
2754 BFD_ASSERT (! unresolved_reloc);
2755 bfd_put_32 (output_bfd,
2756 relocation - dtpoff_base (info),
2757 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2758 }
2759 else
2760 {
2761 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2762 outrel.r_offset += GOT_ENTRY_SIZE;
2763 outrel.r_addend = 0;
2764 htab->srelgot->reloc_count++;
2765 loc += sizeof (Elf32_External_Rela);
2766 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2767 }
2768 }
2769
2770 if (h != NULL)
2771 h->got.offset |= 1;
2772 else
2773 local_got_offsets[r_symndx] |= 1;
2774 }
2775
2776 if (off >= (bfd_vma) -2)
2777 abort ();
2778 if (r_type == ELF32_R_TYPE (rel->r_info))
2779 {
2780 relocation = htab->sgot->output_offset + off;
2781 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2782 relocation += htab->sgot->output_section->vma;
2783 unresolved_reloc = FALSE;
2784 }
2785 else
2786 {
2787 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2788 contents + rel->r_offset);
2789 continue;
2790 }
2791 break;
2792
2793 case R_390_TLS_GOTIE12:
2794 case R_390_TLS_GOTIE20:
2795 case R_390_TLS_IEENT:
2796 if (h == NULL)
2797 {
2798 if (local_got_offsets == NULL)
2799 abort();
2800 off = local_got_offsets[r_symndx];
2801 if (info->shared)
2802 goto emit_tls_relocs;
2803 }
2804 else
2805 {
2806 off = h->got.offset;
2807 tls_type = elf_s390_hash_entry(h)->tls_type;
2808 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2809 goto emit_tls_relocs;
2810 }
2811
2812 if (htab->sgot == NULL)
2813 abort ();
2814
2815 BFD_ASSERT (! unresolved_reloc);
2816 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2817 htab->sgot->contents + off);
2818 relocation = htab->sgot->output_offset + off;
2819 if (r_type == R_390_TLS_IEENT)
2820 relocation += htab->sgot->output_section->vma;
2821 unresolved_reloc = FALSE;
2822 break;
2823
2824 case R_390_TLS_LDM32:
2825 if (! info->shared)
2826 /* The literal pool entry this relocation refers to gets ignored
2827 by the optimized code of the local exec model. Do nothing
2828 and the value will turn out zero. */
2829 continue;
2830
2831 if (htab->sgot == NULL)
2832 abort ();
2833
2834 off = htab->tls_ldm_got.offset;
2835 if (off & 1)
2836 off &= ~1;
2837 else
2838 {
2839 Elf_Internal_Rela outrel;
2840 bfd_byte *loc;
2841
2842 if (htab->srelgot == NULL)
2843 abort ();
2844
2845 outrel.r_offset = (htab->sgot->output_section->vma
2846 + htab->sgot->output_offset + off);
2847
2848 bfd_put_32 (output_bfd, 0,
2849 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2850 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2851 outrel.r_addend = 0;
2852 loc = htab->srelgot->contents;
2853 loc += htab->srelgot->reloc_count++
2854 * sizeof (Elf32_External_Rela);
2855 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2856 htab->tls_ldm_got.offset |= 1;
2857 }
2858 relocation = htab->sgot->output_offset + off;
2859 unresolved_reloc = FALSE;
2860 break;
2861
2862 case R_390_TLS_LE32:
2863 if (info->shared)
2864 {
2865 /* Linking a shared library with non-fpic code requires
2866 a R_390_TLS_TPOFF relocation. */
2867 Elf_Internal_Rela outrel;
2868 asection *sreloc;
2869 bfd_byte *loc;
2870 int indx;
2871
2872 outrel.r_offset = rel->r_offset
2873 + input_section->output_section->vma
2874 + input_section->output_offset;
2875 if (h != NULL && h->dynindx != -1)
2876 indx = h->dynindx;
2877 else
2878 indx = 0;
2879 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2880 if (indx == 0)
2881 outrel.r_addend = relocation - dtpoff_base (info);
2882 else
2883 outrel.r_addend = 0;
2884 sreloc = elf_section_data (input_section)->sreloc;
2885 if (sreloc == NULL)
2886 abort ();
2887 loc = sreloc->contents;
2888 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2889 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2890 }
2891 else
2892 {
2893 BFD_ASSERT (! unresolved_reloc);
2894 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2895 contents + rel->r_offset);
2896 }
2897 continue;
2898
2899 case R_390_TLS_LDO32:
2900 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2901 relocation -= dtpoff_base (info);
2902 else
2903 /* When converting LDO to LE, we must negate. */
2904 relocation = -tpoff (info, relocation);
2905 break;
2906
2907 /* Relocations for tls instructions. */
2908 case R_390_TLS_LOAD:
2909 case R_390_TLS_GDCALL:
2910 case R_390_TLS_LDCALL:
2911 tls_type = GOT_UNKNOWN;
2912 if (h == NULL && local_got_offsets)
2913 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2914 else if (h != NULL)
2915 tls_type = elf_s390_hash_entry(h)->tls_type;
2916
2917 if (tls_type == GOT_TLS_GD)
2918 continue;
2919
2920 if (r_type == R_390_TLS_LOAD)
2921 {
2922 if (!info->shared && (h == NULL || h->dynindx == -1))
2923 {
2924 /* IE->LE transition. Four valid cases:
2925 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2926 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2927 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2928 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2929 unsigned int insn, ry;
2930
2931 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2932 ry = 0;
2933 if ((insn & 0xff00f000) == 0x58000000)
2934 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2935 ry = (insn & 0x000f0000);
2936 else if ((insn & 0xff0f0000) == 0x58000000)
2937 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2938 ry = (insn & 0x0000f000) << 4;
2939 else if ((insn & 0xff00f000) == 0x5800c000)
2940 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2941 ry = (insn & 0x000f0000);
2942 else if ((insn & 0xff0f0000) == 0x580c0000)
2943 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2944 ry = (insn & 0x0000f000) << 4;
2945 else
2946 invalid_tls_insn (input_bfd, input_section, rel);
2947 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2948 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2949 }
2950 }
2951 else if (r_type == R_390_TLS_GDCALL)
2952 {
2953 unsigned int insn;
2954
2955 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2956 if ((insn & 0xff000fff) != 0x4d000000)
2957 invalid_tls_insn (input_bfd, input_section, rel);
2958 if (!info->shared && (h == NULL || h->dynindx == -1))
2959 /* GD->LE transition.
2960 bas %r14,0(%rx,%r13) -> bc 0,0 */
2961 insn = 0x47000000;
2962 else
2963 /* GD->IE transition.
2964 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2965 insn = 0x5822c000;
2966 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2967 }
2968 else if (r_type == R_390_TLS_LDCALL)
2969 {
2970 if (!info->shared)
2971 {
2972 unsigned int insn;
2973
2974 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2975 if ((insn & 0xff000fff) != 0x4d000000)
2976 invalid_tls_insn (input_bfd, input_section, rel);
2977 /* LD->LE transition.
2978 bas %r14,0(%rx,%r13) -> bc 0,0 */
2979 insn = 0x47000000;
2980 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2981 }
2982 }
2983 continue;
2984
2985 default:
2986 break;
2987 }
2988
2989 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2990 because such sections are not SEC_ALLOC and thus ld.so will
2991 not process them. */
2992 if (unresolved_reloc
2993 && !((input_section->flags & SEC_DEBUGGING) != 0
2994 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_DYNAMIC) != 0))
2995 (*_bfd_error_handler)
2996 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2997 bfd_archive_filename (input_bfd),
2998 bfd_get_section_name (input_bfd, input_section),
2999 (long) rel->r_offset,
3000 h->root.root.string);
3001
3002 if (r_type == R_390_20
3003 || r_type == R_390_GOT20
3004 || r_type == R_390_GOTPLT20
3005 || r_type == R_390_TLS_GOTIE20)
3006 {
3007 relocation += rel->r_addend;
3008 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3009 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3010 contents, rel->r_offset,
3011 relocation, 0);
3012 }
3013 else
3014 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3015 contents, rel->r_offset,
3016 relocation, rel->r_addend);
3017
3018 if (r != bfd_reloc_ok)
3019 {
3020 const char *name;
3021
3022 if (h != NULL)
3023 name = h->root.root.string;
3024 else
3025 {
3026 name = bfd_elf_string_from_elf_section (input_bfd,
3027 symtab_hdr->sh_link,
3028 sym->st_name);
3029 if (name == NULL)
3030 return FALSE;
3031 if (*name == '\0')
3032 name = bfd_section_name (input_bfd, sec);
3033 }
3034
3035 if (r == bfd_reloc_overflow)
3036 {
3037
3038 if (! ((*info->callbacks->reloc_overflow)
3039 (info, name, howto->name, (bfd_vma) 0,
3040 input_bfd, input_section, rel->r_offset)))
3041 return FALSE;
3042 }
3043 else
3044 {
3045 (*_bfd_error_handler)
3046 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
3047 bfd_archive_filename (input_bfd),
3048 bfd_get_section_name (input_bfd, input_section),
3049 (long) rel->r_offset, name, (int) r);
3050 return FALSE;
3051 }
3052 }
3053 }
3054
3055 return TRUE;
3056 }
3057
3058 /* Finish up dynamic symbol handling. We set the contents of various
3059 dynamic sections here. */
3060
3061 static bfd_boolean
3062 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3063 bfd *output_bfd;
3064 struct bfd_link_info *info;
3065 struct elf_link_hash_entry *h;
3066 Elf_Internal_Sym *sym;
3067 {
3068 struct elf_s390_link_hash_table *htab;
3069
3070 htab = elf_s390_hash_table (info);
3071
3072 if (h->plt.offset != (bfd_vma) -1)
3073 {
3074 bfd_vma plt_index;
3075 bfd_vma got_offset;
3076 Elf_Internal_Rela rela;
3077 bfd_byte *loc;
3078 bfd_vma relative_offset;
3079
3080 /* This symbol has an entry in the procedure linkage table. Set
3081 it up. */
3082 if (h->dynindx == -1
3083 || htab->splt == NULL
3084 || htab->sgotplt == NULL
3085 || htab->srelplt == NULL)
3086 abort ();
3087
3088 /* Calc. index no.
3089 Current offset - size first entry / entry size. */
3090 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3091
3092 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3093 addr & GOT addr. */
3094 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3095
3096 /* S390 uses halfwords for relative branch calc! */
3097 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3098 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3099 /* If offset is > 32768, branch to a previous branch
3100 390 can only handle +-64 K jumps. */
3101 if ( -32768 > (int) relative_offset )
3102 relative_offset
3103 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3104
3105 /* Fill in the entry in the procedure linkage table. */
3106 if (!info->shared)
3107 {
3108 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3109 htab->splt->contents + h->plt.offset);
3110 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3111 htab->splt->contents + h->plt.offset + 4);
3112 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3113 htab->splt->contents + h->plt.offset + 8);
3114 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3115 htab->splt->contents + h->plt.offset + 12);
3116 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3117 htab->splt->contents + h->plt.offset + 16);
3118 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3119 htab->splt->contents + h->plt.offset + 20);
3120 bfd_put_32 (output_bfd,
3121 (htab->sgotplt->output_section->vma
3122 + htab->sgotplt->output_offset
3123 + got_offset),
3124 htab->splt->contents + h->plt.offset + 24);
3125 }
3126 else if (got_offset < 4096)
3127 {
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3129 htab->splt->contents + h->plt.offset);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3131 htab->splt->contents + h->plt.offset + 4);
3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3133 htab->splt->contents + h->plt.offset + 8);
3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3135 htab->splt->contents + h->plt.offset + 12);
3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3137 htab->splt->contents + h->plt.offset + 16);
3138 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3139 htab->splt->contents + h->plt.offset + 20);
3140 bfd_put_32 (output_bfd, (bfd_vma) 0,
3141 htab->splt->contents + h->plt.offset + 24);
3142 }
3143 else if (got_offset < 32768)
3144 {
3145 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3146 htab->splt->contents + h->plt.offset);
3147 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3148 htab->splt->contents + h->plt.offset + 4);
3149 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3150 htab->splt->contents + h->plt.offset + 8);
3151 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3152 htab->splt->contents + h->plt.offset + 12);
3153 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3154 htab->splt->contents + h->plt.offset + 16);
3155 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3156 htab->splt->contents + h->plt.offset + 20);
3157 bfd_put_32 (output_bfd, (bfd_vma) 0,
3158 htab->splt->contents + h->plt.offset + 24);
3159 }
3160 else
3161 {
3162 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3163 htab->splt->contents + h->plt.offset);
3164 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3165 htab->splt->contents + h->plt.offset + 4);
3166 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3167 htab->splt->contents + h->plt.offset + 8);
3168 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3169 htab->splt->contents + h->plt.offset + 12);
3170 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3171 htab->splt->contents + h->plt.offset + 16);
3172 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3173 htab->splt->contents + h->plt.offset + 20);
3174 bfd_put_32 (output_bfd, got_offset,
3175 htab->splt->contents + h->plt.offset + 24);
3176 }
3177 /* Insert offset into reloc. table here. */
3178 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3179 htab->splt->contents + h->plt.offset + 28);
3180
3181 /* Fill in the entry in the global offset table.
3182 Points to instruction after GOT offset. */
3183 bfd_put_32 (output_bfd,
3184 (htab->splt->output_section->vma
3185 + htab->splt->output_offset
3186 + h->plt.offset
3187 + 12),
3188 htab->sgotplt->contents + got_offset);
3189
3190 /* Fill in the entry in the .rela.plt section. */
3191 rela.r_offset = (htab->sgotplt->output_section->vma
3192 + htab->sgotplt->output_offset
3193 + got_offset);
3194 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3195 rela.r_addend = 0;
3196 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3197 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3198
3199 if ((h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR) == 0)
3200 {
3201 /* Mark the symbol as undefined, rather than as defined in
3202 the .plt section. Leave the value alone. This is a clue
3203 for the dynamic linker, to make function pointer
3204 comparisons work between an application and shared
3205 library. */
3206 sym->st_shndx = SHN_UNDEF;
3207 }
3208 }
3209
3210 if (h->got.offset != (bfd_vma) -1
3211 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3212 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3213 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3214 {
3215 Elf_Internal_Rela rela;
3216 bfd_byte *loc;
3217
3218 /* This symbol has an entry in the global offset table. Set it
3219 up. */
3220
3221 if (htab->sgot == NULL || htab->srelgot == NULL)
3222 abort ();
3223
3224 rela.r_offset = (htab->sgot->output_section->vma
3225 + htab->sgot->output_offset
3226 + (h->got.offset &~ (bfd_vma) 1));
3227
3228 /* If this is a static link, or it is a -Bsymbolic link and the
3229 symbol is defined locally or was forced to be local because
3230 of a version file, we just want to emit a RELATIVE reloc.
3231 The entry in the global offset table will already have been
3232 initialized in the relocate_section function. */
3233 if (info->shared
3234 && (info->symbolic
3235 || h->dynindx == -1
3236 || (h->elf_link_hash_flags & ELF_LINK_FORCED_LOCAL))
3237 && (h->elf_link_hash_flags & ELF_LINK_HASH_DEF_REGULAR))
3238 {
3239 BFD_ASSERT((h->got.offset & 1) != 0);
3240 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3241 rela.r_addend = (h->root.u.def.value
3242 + h->root.u.def.section->output_section->vma
3243 + h->root.u.def.section->output_offset);
3244 }
3245 else
3246 {
3247 BFD_ASSERT((h->got.offset & 1) == 0);
3248 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3249 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3250 rela.r_addend = 0;
3251 }
3252
3253 loc = htab->srelgot->contents;
3254 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3255 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3256 }
3257
3258 if ((h->elf_link_hash_flags & ELF_LINK_HASH_NEEDS_COPY) != 0)
3259 {
3260 Elf_Internal_Rela rela;
3261 bfd_byte *loc;
3262
3263 /* This symbols needs a copy reloc. Set it up. */
3264
3265 if (h->dynindx == -1
3266 || (h->root.type != bfd_link_hash_defined
3267 && h->root.type != bfd_link_hash_defweak)
3268 || htab->srelbss == NULL)
3269 abort ();
3270
3271 rela.r_offset = (h->root.u.def.value
3272 + h->root.u.def.section->output_section->vma
3273 + h->root.u.def.section->output_offset);
3274 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3275 rela.r_addend = 0;
3276 loc = htab->srelbss->contents;
3277 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3278 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3279 }
3280
3281 /* Mark some specially defined symbols as absolute. */
3282 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3283 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3284 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3285 sym->st_shndx = SHN_ABS;
3286
3287 return TRUE;
3288 }
3289
3290 /* Used to decide how to sort relocs in an optimal manner for the
3291 dynamic linker, before writing them out. */
3292
3293 static enum elf_reloc_type_class
3294 elf_s390_reloc_type_class (rela)
3295 const Elf_Internal_Rela *rela;
3296 {
3297 switch ((int) ELF32_R_TYPE (rela->r_info))
3298 {
3299 case R_390_RELATIVE:
3300 return reloc_class_relative;
3301 case R_390_JMP_SLOT:
3302 return reloc_class_plt;
3303 case R_390_COPY:
3304 return reloc_class_copy;
3305 default:
3306 return reloc_class_normal;
3307 }
3308 }
3309
3310 /* Finish up the dynamic sections. */
3311
3312 static bfd_boolean
3313 elf_s390_finish_dynamic_sections (output_bfd, info)
3314 bfd *output_bfd;
3315 struct bfd_link_info *info;
3316 {
3317 struct elf_s390_link_hash_table *htab;
3318 bfd *dynobj;
3319 asection *sdyn;
3320
3321 htab = elf_s390_hash_table (info);
3322 dynobj = htab->elf.dynobj;
3323 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3324
3325 if (htab->elf.dynamic_sections_created)
3326 {
3327 Elf32_External_Dyn *dyncon, *dynconend;
3328
3329 if (sdyn == NULL || htab->sgot == NULL)
3330 abort ();
3331
3332 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3333 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->_raw_size);
3334 for (; dyncon < dynconend; dyncon++)
3335 {
3336 Elf_Internal_Dyn dyn;
3337 asection *s;
3338
3339 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3340
3341 switch (dyn.d_tag)
3342 {
3343 default:
3344 continue;
3345
3346 case DT_PLTGOT:
3347 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3348 break;
3349
3350 case DT_JMPREL:
3351 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3352 break;
3353
3354 case DT_PLTRELSZ:
3355 s = htab->srelplt->output_section;
3356 if (s->_cooked_size != 0)
3357 dyn.d_un.d_val = s->_cooked_size;
3358 else
3359 dyn.d_un.d_val = s->_raw_size;
3360 break;
3361 }
3362
3363 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3364 }
3365
3366 /* Fill in the special first entry in the procedure linkage table. */
3367 if (htab->splt && htab->splt->_raw_size > 0)
3368 {
3369 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3370 if (info->shared)
3371 {
3372 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3373 htab->splt->contents );
3374 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3375 htab->splt->contents +4 );
3376 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3377 htab->splt->contents +8 );
3378 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3379 htab->splt->contents +12 );
3380 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3381 htab->splt->contents +16 );
3382 }
3383 else
3384 {
3385 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3386 htab->splt->contents );
3387 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3388 htab->splt->contents +4 );
3389 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3390 htab->splt->contents +8 );
3391 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3392 htab->splt->contents +12 );
3393 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3394 htab->splt->contents +16 );
3395 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3396 htab->splt->contents +20 );
3397 bfd_put_32 (output_bfd,
3398 htab->sgotplt->output_section->vma
3399 + htab->sgotplt->output_offset,
3400 htab->splt->contents + 24);
3401 }
3402 elf_section_data (htab->splt->output_section)
3403 ->this_hdr.sh_entsize = 4;
3404 }
3405
3406 }
3407
3408 if (htab->sgotplt)
3409 {
3410 /* Fill in the first three entries in the global offset table. */
3411 if (htab->sgotplt->_raw_size > 0)
3412 {
3413 bfd_put_32 (output_bfd,
3414 (sdyn == NULL ? (bfd_vma) 0
3415 : sdyn->output_section->vma + sdyn->output_offset),
3416 htab->sgotplt->contents);
3417 /* One entry for shared object struct ptr. */
3418 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3419 /* One entry for _dl_runtime_resolve. */
3420 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3421 }
3422
3423 elf_section_data (htab->sgotplt->output_section)
3424 ->this_hdr.sh_entsize = 4;
3425 }
3426 return TRUE;
3427 }
3428
3429 static bfd_boolean
3430 elf_s390_grok_prstatus (abfd, note)
3431 bfd * abfd;
3432 Elf_Internal_Note * note;
3433 {
3434 int offset;
3435 unsigned int raw_size;
3436
3437 switch (note->descsz)
3438 {
3439 default:
3440 return FALSE;
3441
3442 case 224: /* S/390 Linux. */
3443 /* pr_cursig */
3444 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3445
3446 /* pr_pid */
3447 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3448
3449 /* pr_reg */
3450 offset = 72;
3451 raw_size = 144;
3452 break;
3453 }
3454
3455 /* Make a ".reg/999" section. */
3456 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3457 raw_size, note->descpos + offset);
3458 }
3459
3460 /* Return address for Ith PLT stub in section PLT, for relocation REL
3461 or (bfd_vma) -1 if it should not be included. */
3462
3463 static bfd_vma
3464 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3465 const arelent *rel ATTRIBUTE_UNUSED)
3466 {
3467 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3468 }
3469
3470
3471 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3472 #define TARGET_BIG_NAME "elf32-s390"
3473 #define ELF_ARCH bfd_arch_s390
3474 #define ELF_MACHINE_CODE EM_S390
3475 #define ELF_MACHINE_ALT1 EM_S390_OLD
3476 #define ELF_MAXPAGESIZE 0x1000
3477
3478 #define elf_backend_can_gc_sections 1
3479 #define elf_backend_can_refcount 1
3480 #define elf_backend_want_got_plt 1
3481 #define elf_backend_plt_readonly 1
3482 #define elf_backend_want_plt_sym 0
3483 #define elf_backend_got_header_size 12
3484 #define elf_backend_rela_normal 1
3485
3486 #define elf_info_to_howto elf_s390_info_to_howto
3487
3488 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3489 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3490 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3491
3492 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3493 #define elf_backend_check_relocs elf_s390_check_relocs
3494 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3495 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3496 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3497 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3498 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3499 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3500 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3501 #define elf_backend_relocate_section elf_s390_relocate_section
3502 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3503 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3504 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3505 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3506
3507 #define bfd_elf32_mkobject elf_s390_mkobject
3508 #define elf_backend_object_p elf_s390_object_p
3509
3510 #include "elf32-target.h"
git-cvsimport of binutils cvsroot