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* config/tc-mips.c (append_insn): Correctly handle mips16 case
[binutils.git] / bfd / elf32-s390.c
bloba2433636ffc13a1740a30fd84de9a91c47477d67
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 static asection *elf_s390_gc_mark_hook
50 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
51 struct elf_link_hash_entry *, Elf_Internal_Sym *));
52 static bfd_boolean elf_s390_gc_sweep_hook
53 PARAMS ((bfd *, struct bfd_link_info *, asection *,
54 const Elf_Internal_Rela *));
55 struct elf_s390_link_hash_entry;
56 static void elf_s390_adjust_gotplt
57 PARAMS ((struct elf_s390_link_hash_entry *));
58 static bfd_boolean elf_s390_adjust_dynamic_symbol
59 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
60 static bfd_boolean allocate_dynrelocs
61 PARAMS ((struct elf_link_hash_entry *, PTR));
62 static bfd_boolean readonly_dynrelocs
63 PARAMS ((struct elf_link_hash_entry *, PTR));
64 static bfd_boolean elf_s390_size_dynamic_sections
65 PARAMS ((bfd *, struct bfd_link_info *));
66 static bfd_boolean elf_s390_relocate_section
67 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
68 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
69 static bfd_boolean elf_s390_finish_dynamic_symbol
70 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
71 Elf_Internal_Sym *));
72 static enum elf_reloc_type_class elf_s390_reloc_type_class
73 PARAMS ((const Elf_Internal_Rela *));
74 static bfd_boolean elf_s390_finish_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76 static bfd_boolean elf_s390_mkobject
77 PARAMS ((bfd *));
78 static bfd_boolean elf_s390_object_p
79 PARAMS ((bfd *));
80 static bfd_boolean elf_s390_grok_prstatus
81 PARAMS ((bfd *, Elf_Internal_Note *));
82 static int elf_s390_tls_transition
83 PARAMS ((struct bfd_link_info *, int, int));
84 static bfd_reloc_status_type s390_tls_reloc
85 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
86 static bfd_vma dtpoff_base
87 PARAMS ((struct bfd_link_info *));
88 static bfd_vma tpoff
89 PARAMS ((struct bfd_link_info *, bfd_vma));
90 static void invalid_tls_insn
91 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
92 static bfd_reloc_status_type s390_elf_ldisp_reloc
93 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
94
95 #include "elf/s390.h"
96
97 /* The relocation "howto" table. */
98
99 static reloc_howto_type elf_howto_table[] =
100 {
101 HOWTO (R_390_NONE, /* type */
102 0, /* rightshift */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
104 0, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_dont, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_390_NONE", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
117 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
118 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
121 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
123 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
125 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
127 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
131 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
133 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
135 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
137 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
139 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
141 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
143 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
145 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
151 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
157 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
158 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
159 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
160 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
161 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
163 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
165 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
166 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
167 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
168 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
170 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
172 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
173 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
175 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
177 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
179 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
180 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
185 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
186 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
187 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
188 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
189 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
191 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
192 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
193 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
194 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
196 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
197 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
199 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
200 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
202 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
204 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
205 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
207 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
208 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
214 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
220 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
221 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
222 };
223
224 /* GNU extension to record C++ vtable hierarchy. */
225 static reloc_howto_type elf32_s390_vtinherit_howto =
226 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
227 static reloc_howto_type elf32_s390_vtentry_howto =
228 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);
229
230 static reloc_howto_type *
231 elf_s390_reloc_type_lookup (abfd, code)
232 bfd *abfd ATTRIBUTE_UNUSED;
233 bfd_reloc_code_real_type code;
234 {
235 switch (code)
236 {
237 case BFD_RELOC_NONE:
238 return &elf_howto_table[(int) R_390_NONE];
239 case BFD_RELOC_8:
240 return &elf_howto_table[(int) R_390_8];
241 case BFD_RELOC_390_12:
242 return &elf_howto_table[(int) R_390_12];
243 case BFD_RELOC_16:
244 return &elf_howto_table[(int) R_390_16];
245 case BFD_RELOC_32:
246 return &elf_howto_table[(int) R_390_32];
247 case BFD_RELOC_CTOR:
248 return &elf_howto_table[(int) R_390_32];
249 case BFD_RELOC_32_PCREL:
250 return &elf_howto_table[(int) R_390_PC32];
251 case BFD_RELOC_390_GOT12:
252 return &elf_howto_table[(int) R_390_GOT12];
253 case BFD_RELOC_32_GOT_PCREL:
254 return &elf_howto_table[(int) R_390_GOT32];
255 case BFD_RELOC_390_PLT32:
256 return &elf_howto_table[(int) R_390_PLT32];
257 case BFD_RELOC_390_COPY:
258 return &elf_howto_table[(int) R_390_COPY];
259 case BFD_RELOC_390_GLOB_DAT:
260 return &elf_howto_table[(int) R_390_GLOB_DAT];
261 case BFD_RELOC_390_JMP_SLOT:
262 return &elf_howto_table[(int) R_390_JMP_SLOT];
263 case BFD_RELOC_390_RELATIVE:
264 return &elf_howto_table[(int) R_390_RELATIVE];
265 case BFD_RELOC_32_GOTOFF:
266 return &elf_howto_table[(int) R_390_GOTOFF32];
267 case BFD_RELOC_390_GOTPC:
268 return &elf_howto_table[(int) R_390_GOTPC];
269 case BFD_RELOC_390_GOT16:
270 return &elf_howto_table[(int) R_390_GOT16];
271 case BFD_RELOC_16_PCREL:
272 return &elf_howto_table[(int) R_390_PC16];
273 case BFD_RELOC_390_PC16DBL:
274 return &elf_howto_table[(int) R_390_PC16DBL];
275 case BFD_RELOC_390_PLT16DBL:
276 return &elf_howto_table[(int) R_390_PLT16DBL];
277 case BFD_RELOC_390_PC32DBL:
278 return &elf_howto_table[(int) R_390_PC32DBL];
279 case BFD_RELOC_390_PLT32DBL:
280 return &elf_howto_table[(int) R_390_PLT32DBL];
281 case BFD_RELOC_390_GOTPCDBL:
282 return &elf_howto_table[(int) R_390_GOTPCDBL];
283 case BFD_RELOC_390_GOTENT:
284 return &elf_howto_table[(int) R_390_GOTENT];
285 case BFD_RELOC_16_GOTOFF:
286 return &elf_howto_table[(int) R_390_GOTOFF16];
287 case BFD_RELOC_390_GOTPLT12:
288 return &elf_howto_table[(int) R_390_GOTPLT12];
289 case BFD_RELOC_390_GOTPLT16:
290 return &elf_howto_table[(int) R_390_GOTPLT16];
291 case BFD_RELOC_390_GOTPLT32:
292 return &elf_howto_table[(int) R_390_GOTPLT32];
293 case BFD_RELOC_390_GOTPLTENT:
294 return &elf_howto_table[(int) R_390_GOTPLTENT];
295 case BFD_RELOC_390_PLTOFF16:
296 return &elf_howto_table[(int) R_390_PLTOFF16];
297 case BFD_RELOC_390_PLTOFF32:
298 return &elf_howto_table[(int) R_390_PLTOFF32];
299 case BFD_RELOC_390_TLS_LOAD:
300 return &elf_howto_table[(int) R_390_TLS_LOAD];
301 case BFD_RELOC_390_TLS_GDCALL:
302 return &elf_howto_table[(int) R_390_TLS_GDCALL];
303 case BFD_RELOC_390_TLS_LDCALL:
304 return &elf_howto_table[(int) R_390_TLS_LDCALL];
305 case BFD_RELOC_390_TLS_GD32:
306 return &elf_howto_table[(int) R_390_TLS_GD32];
307 case BFD_RELOC_390_TLS_GOTIE12:
308 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
309 case BFD_RELOC_390_TLS_GOTIE32:
310 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
311 case BFD_RELOC_390_TLS_LDM32:
312 return &elf_howto_table[(int) R_390_TLS_LDM32];
313 case BFD_RELOC_390_TLS_IE32:
314 return &elf_howto_table[(int) R_390_TLS_IE32];
315 case BFD_RELOC_390_TLS_IEENT:
316 return &elf_howto_table[(int) R_390_TLS_IEENT];
317 case BFD_RELOC_390_TLS_LE32:
318 return &elf_howto_table[(int) R_390_TLS_LE32];
319 case BFD_RELOC_390_TLS_LDO32:
320 return &elf_howto_table[(int) R_390_TLS_LDO32];
321 case BFD_RELOC_390_TLS_DTPMOD:
322 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
323 case BFD_RELOC_390_TLS_DTPOFF:
324 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
325 case BFD_RELOC_390_TLS_TPOFF:
326 return &elf_howto_table[(int) R_390_TLS_TPOFF];
327 case BFD_RELOC_390_20:
328 return &elf_howto_table[(int) R_390_20];
329 case BFD_RELOC_390_GOT20:
330 return &elf_howto_table[(int) R_390_GOT20];
331 case BFD_RELOC_390_GOTPLT20:
332 return &elf_howto_table[(int) R_390_GOTPLT20];
333 case BFD_RELOC_390_TLS_GOTIE20:
334 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
335 case BFD_RELOC_VTABLE_INHERIT:
336 return &elf32_s390_vtinherit_howto;
337 case BFD_RELOC_VTABLE_ENTRY:
338 return &elf32_s390_vtentry_howto;
339 default:
340 break;
341 }
342 return 0;
343 }
344
345 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
346 and elf32-s390.c has its own copy. */
347
348 static void
349 elf_s390_info_to_howto (abfd, cache_ptr, dst)
350 bfd *abfd ATTRIBUTE_UNUSED;
351 arelent *cache_ptr;
352 Elf_Internal_Rela *dst;
353 {
354 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
355 switch (r_type)
356 {
357 case R_390_GNU_VTINHERIT:
358 cache_ptr->howto = &elf32_s390_vtinherit_howto;
359 break;
360
361 case R_390_GNU_VTENTRY:
362 cache_ptr->howto = &elf32_s390_vtentry_howto;
363 break;
364
365 default:
366 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
367 {
368 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
369 abfd, (int) r_type);
370 r_type = R_390_NONE;
371 }
372 cache_ptr->howto = &elf_howto_table[r_type];
373 }
374 }
375
376 /* A relocation function which doesn't do anything. */
377 static bfd_reloc_status_type
378 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
379 output_bfd, error_message)
380 bfd *abfd ATTRIBUTE_UNUSED;
381 arelent *reloc_entry;
382 asymbol *symbol ATTRIBUTE_UNUSED;
383 PTR data ATTRIBUTE_UNUSED;
384 asection *input_section;
385 bfd *output_bfd;
386 char **error_message ATTRIBUTE_UNUSED;
387 {
388 if (output_bfd)
389 reloc_entry->address += input_section->output_offset;
390 return bfd_reloc_ok;
391 }
392
393 /* Handle the large displacement relocs. */
394 static bfd_reloc_status_type
395 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
396 output_bfd, error_message)
397 bfd *abfd ATTRIBUTE_UNUSED;
398 arelent *reloc_entry;
399 asymbol *symbol;
400 PTR data ATTRIBUTE_UNUSED;
401 asection *input_section;
402 bfd *output_bfd;
403 char **error_message ATTRIBUTE_UNUSED;
404 {
405 reloc_howto_type *howto = reloc_entry->howto;
406 bfd_vma relocation;
407 bfd_vma insn;
408
409 if (output_bfd != (bfd *) NULL
410 && (symbol->flags & BSF_SECTION_SYM) == 0
411 && (! howto->partial_inplace
412 || reloc_entry->addend == 0))
413 {
414 reloc_entry->address += input_section->output_offset;
415 return bfd_reloc_ok;
416 }
417
418 if (output_bfd != NULL)
419 return bfd_reloc_continue;
420
421 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
422 return bfd_reloc_outofrange;
423
424 relocation = (symbol->value
425 + symbol->section->output_section->vma
426 + symbol->section->output_offset);
427 relocation += reloc_entry->addend;
428 if (howto->pc_relative)
429 {
430 relocation -= (input_section->output_section->vma
431 + input_section->output_offset);
432 relocation -= reloc_entry->address;
433 }
434
435 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
436 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
437 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
438
439 if ((bfd_signed_vma) relocation < - 0x80000
440 || (bfd_signed_vma) relocation > 0x7ffff)
441 return bfd_reloc_overflow;
442 else
443 return bfd_reloc_ok;
444 }
445
446 static bfd_boolean
447 elf_s390_is_local_label_name (abfd, name)
448 bfd *abfd;
449 const char *name;
450 {
451 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
452 return TRUE;
453
454 return _bfd_elf_is_local_label_name (abfd, name);
455 }
456
457 /* Functions for the 390 ELF linker. */
458
459 /* The name of the dynamic interpreter. This is put in the .interp
460 section. */
461
462 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
463
464 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
465 copying dynamic variables from a shared lib into an app's dynbss
466 section, and instead use a dynamic relocation to point into the
467 shared lib. */
468 #define ELIMINATE_COPY_RELOCS 1
469
470 /* The size in bytes of the first entry in the procedure linkage table. */
471 #define PLT_FIRST_ENTRY_SIZE 32
472 /* The size in bytes of an entry in the procedure linkage table. */
473 #define PLT_ENTRY_SIZE 32
474
475 #define GOT_ENTRY_SIZE 4
476
477 /* The first three entries in a procedure linkage table are reserved,
478 and the initial contents are unimportant (we zero them out).
479 Subsequent entries look like this. See the SVR4 ABI 386
480 supplement to see how this works. */
481
482 /* For the s390, simple addr offset can only be 0 - 4096.
483 To use the full 2 GB address space, several instructions
484 are needed to load an address in a register and execute
485 a branch( or just saving the address)
486
487 Furthermore, only r 0 and 1 are free to use!!! */
488
489 /* The first 3 words in the GOT are then reserved.
490 Word 0 is the address of the dynamic table.
491 Word 1 is a pointer to a structure describing the object
492 Word 2 is used to point to the loader entry address.
493
494 The code for position independent PLT entries looks like this:
495
496 r12 holds addr of the current GOT at entry to the PLT
497
498 The GOT holds the address in the PLT to be executed.
499 The loader then gets:
500 24(15) = Pointer to the structure describing the object.
501 28(15) = Offset in symbol table
502
503 The loader must then find the module where the function is
504 and insert the address in the GOT.
505
506 Note: 390 can only address +- 64 K relative.
507 We check if offset > 65536, then make a relative branch -64xxx
508 back to a previous defined branch
509
510 PLT1: BASR 1,0 # 2 bytes
511 L 1,22(1) # 4 bytes Load offset in GOT in r 1
512 L 1,(1,12) # 4 bytes Load address from GOT in r1
513 BCR 15,1 # 2 bytes Jump to address
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in symol table in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0 # 2 bytes filler
518 .long ? # 4 bytes offset in GOT
519 .long ? # 4 bytes offset into symbol table
520
521 This was the general case. There are two additional, optimizes PLT
522 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
523 First the one for GOT offsets < 4096:
524
525 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
526 BCR 15,1 # 2 bytes Jump to address
527 .word 0,0,0 # 6 bytes filler
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0,0,0 # 6 bytes filler
532 .long ? # 4 bytes offset into symbol table
533
534 Second the one for GOT offsets < 32768:
535
536 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
537 L 1,(1,12) # 4 bytes Load address from GOT to r1
538 BCR 15,1 # 2 bytes Jump to address
539 .word 0 # 2 bytes filler
540 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
541 L 1,14(1) # 4 bytes Load offset in symbol table in r1
542 BRC 15,-x # 4 bytes Jump to start of PLT
543 .word 0,0,0 # 6 bytes filler
544 .long ? # 4 bytes offset into symbol table
545
546 Total = 32 bytes per PLT entry
547
548 The code for static build PLT entries looks like this:
549
550 PLT1: BASR 1,0 # 2 bytes
551 L 1,22(1) # 4 bytes Load address of GOT entry
552 L 1,0(0,1) # 4 bytes Load address from GOT in r1
553 BCR 15,1 # 2 bytes Jump to address
554 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
555 L 1,14(1) # 4 bytes Load offset in symbol table in r1
556 BRC 15,-x # 4 bytes Jump to start of PLT
557 .word 0 # 2 bytes filler
558 .long ? # 4 bytes address of GOT entry
559 .long ? # 4 bytes offset into symbol table */
560
561 #define PLT_PIC_ENTRY_WORD0 0x0d105810
562 #define PLT_PIC_ENTRY_WORD1 0x10165811
563 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
564 #define PLT_PIC_ENTRY_WORD3 0x0d105810
565 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
566
567 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
568 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
569 #define PLT_PIC12_ENTRY_WORD2 0x00000000
570 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
571 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
572
573 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
574 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
575 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
576 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
577 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
578
579 #define PLT_ENTRY_WORD0 0x0d105810
580 #define PLT_ENTRY_WORD1 0x10165810
581 #define PLT_ENTRY_WORD2 0x100007f1
582 #define PLT_ENTRY_WORD3 0x0d105810
583 #define PLT_ENTRY_WORD4 0x100ea7f4
584
585 /* The first PLT entry pushes the offset into the symbol table
586 from R1 onto the stack at 8(15) and the loader object info
587 at 12(15), loads the loader address in R1 and jumps to it. */
588
589 /* The first entry in the PLT for PIC code:
590
591 PLT0:
592 ST 1,28(15) # R1 has offset into symbol table
593 L 1,4(12) # Get loader ino(object struct address)
594 ST 1,24(15) # Store address
595 L 1,8(12) # Entry address of loader in R1
596 BR 1 # Jump to loader
597
598 The first entry in the PLT for static code:
599
600 PLT0:
601 ST 1,28(15) # R1 has offset into symbol table
602 BASR 1,0
603 L 1,18(0,1) # Get address of GOT
604 MVC 24(4,15),4(1) # Move loader ino to stack
605 L 1,8(1) # Get address of loader
606 BR 1 # Jump to loader
607 .word 0 # filler
608 .long got # address of GOT */
609
610 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
611 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
612 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
613 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
614 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
615
616 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
617 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
618 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
619 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
620 #define PLT_FIRST_ENTRY_WORD4 0x58101008
621 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
622
623 /* The s390 linker needs to keep track of the number of relocs that it
624 decides to copy as dynamic relocs in check_relocs for each symbol.
625 This is so that it can later discard them if they are found to be
626 unnecessary. We store the information in a field extending the
627 regular ELF linker hash table. */
628
629 struct elf_s390_dyn_relocs
630 {
631 struct elf_s390_dyn_relocs *next;
632
633 /* The input section of the reloc. */
634 asection *sec;
635
636 /* Total number of relocs copied for the input section. */
637 bfd_size_type count;
638
639 /* Number of pc-relative relocs copied for the input section. */
640 bfd_size_type pc_count;
641 };
642
643 /* s390 ELF linker hash entry. */
644
645 struct elf_s390_link_hash_entry
646 {
647 struct elf_link_hash_entry elf;
648
649 /* Track dynamic relocs copied for this symbol. */
650 struct elf_s390_dyn_relocs *dyn_relocs;
651
652 /* Number of GOTPLT references for a function. */
653 bfd_signed_vma gotplt_refcount;
654
655 #define GOT_UNKNOWN 0
656 #define GOT_NORMAL 1
657 #define GOT_TLS_GD 2
658 #define GOT_TLS_IE 3
659 #define GOT_TLS_IE_NLT 4
660 unsigned char tls_type;
661 };
662
663 #define elf_s390_hash_entry(ent) \
664 ((struct elf_s390_link_hash_entry *)(ent))
665
666 struct elf_s390_obj_tdata
667 {
668 struct elf_obj_tdata root;
669
670 /* tls_type for each local got entry. */
671 char *local_got_tls_type;
672 };
673
674 #define elf_s390_tdata(abfd) \
675 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
676
677 #define elf_s390_local_got_tls_type(abfd) \
678 (elf_s390_tdata (abfd)->local_got_tls_type)
679
680 static bfd_boolean
681 elf_s390_mkobject (abfd)
682 bfd *abfd;
683 {
684 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
685 abfd->tdata.any = bfd_zalloc (abfd, amt);
686 if (abfd->tdata.any == NULL)
687 return FALSE;
688 return TRUE;
689 }
690
691 static bfd_boolean
692 elf_s390_object_p (abfd)
693 bfd *abfd;
694 {
695 /* Set the right machine number for an s390 elf32 file. */
696 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
697 }
698
699 /* s390 ELF linker hash table. */
700
701 struct elf_s390_link_hash_table
702 {
703 struct elf_link_hash_table elf;
704
705 /* Short-cuts to get to dynamic linker sections. */
706 asection *sgot;
707 asection *sgotplt;
708 asection *srelgot;
709 asection *splt;
710 asection *srelplt;
711 asection *sdynbss;
712 asection *srelbss;
713
714 union {
715 bfd_signed_vma refcount;
716 bfd_vma offset;
717 } tls_ldm_got;
718
719 /* Small local sym to section mapping cache. */
720 struct sym_sec_cache sym_sec;
721 };
722
723 /* Get the s390 ELF linker hash table from a link_info structure. */
724
725 #define elf_s390_hash_table(p) \
726 ((struct elf_s390_link_hash_table *) ((p)->hash))
727
728 /* Create an entry in an s390 ELF linker hash table. */
729
730 static struct bfd_hash_entry *
731 link_hash_newfunc (entry, table, string)
732 struct bfd_hash_entry *entry;
733 struct bfd_hash_table *table;
734 const char *string;
735 {
736 /* Allocate the structure if it has not already been allocated by a
737 subclass. */
738 if (entry == NULL)
739 {
740 entry = bfd_hash_allocate (table,
741 sizeof (struct elf_s390_link_hash_entry));
742 if (entry == NULL)
743 return entry;
744 }
745
746 /* Call the allocation method of the superclass. */
747 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
748 if (entry != NULL)
749 {
750 struct elf_s390_link_hash_entry *eh;
751
752 eh = (struct elf_s390_link_hash_entry *) entry;
753 eh->dyn_relocs = NULL;
754 eh->gotplt_refcount = 0;
755 eh->tls_type = GOT_UNKNOWN;
756 }
757
758 return entry;
759 }
760
761 /* Create an s390 ELF linker hash table. */
762
763 static struct bfd_link_hash_table *
764 elf_s390_link_hash_table_create (abfd)
765 bfd *abfd;
766 {
767 struct elf_s390_link_hash_table *ret;
768 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
769
770 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
771 if (ret == NULL)
772 return NULL;
773
774 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
775 {
776 free (ret);
777 return NULL;
778 }
779
780 ret->sgot = NULL;
781 ret->sgotplt = NULL;
782 ret->srelgot = NULL;
783 ret->splt = NULL;
784 ret->srelplt = NULL;
785 ret->sdynbss = NULL;
786 ret->srelbss = NULL;
787 ret->tls_ldm_got.refcount = 0;
788 ret->sym_sec.abfd = NULL;
789
790 return &ret->elf.root;
791 }
792
793 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
794 shortcuts to them in our hash table. */
795
796 static bfd_boolean
797 create_got_section (dynobj, info)
798 bfd *dynobj;
799 struct bfd_link_info *info;
800 {
801 struct elf_s390_link_hash_table *htab;
802
803 if (! _bfd_elf_create_got_section (dynobj, info))
804 return FALSE;
805
806 htab = elf_s390_hash_table (info);
807 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
808 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
809 if (!htab->sgot || !htab->sgotplt)
810 abort ();
811
812 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
813 (SEC_ALLOC | SEC_LOAD
814 | SEC_HAS_CONTENTS
815 | SEC_IN_MEMORY
816 | SEC_LINKER_CREATED
817 | SEC_READONLY));
818 if (htab->srelgot == NULL
819 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
820 return FALSE;
821 return TRUE;
822 }
823
824 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
825 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
826 hash table. */
827
828 static bfd_boolean
829 elf_s390_create_dynamic_sections (dynobj, info)
830 bfd *dynobj;
831 struct bfd_link_info *info;
832 {
833 struct elf_s390_link_hash_table *htab;
834
835 htab = elf_s390_hash_table (info);
836 if (!htab->sgot && !create_got_section (dynobj, info))
837 return FALSE;
838
839 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
840 return FALSE;
841
842 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
843 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
844 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
845 if (!info->shared)
846 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
847
848 if (!htab->splt || !htab->srelplt || !htab->sdynbss
849 || (!info->shared && !htab->srelbss))
850 abort ();
851
852 return TRUE;
853 }
854
855 /* Copy the extra info we tack onto an elf_link_hash_entry. */
856
857 static void
858 elf_s390_copy_indirect_symbol (bed, dir, ind)
859 const struct elf_backend_data *bed;
860 struct elf_link_hash_entry *dir, *ind;
861 {
862 struct elf_s390_link_hash_entry *edir, *eind;
863
864 edir = (struct elf_s390_link_hash_entry *) dir;
865 eind = (struct elf_s390_link_hash_entry *) ind;
866
867 if (eind->dyn_relocs != NULL)
868 {
869 if (edir->dyn_relocs != NULL)
870 {
871 struct elf_s390_dyn_relocs **pp;
872 struct elf_s390_dyn_relocs *p;
873
874 if (ind->root.type == bfd_link_hash_indirect)
875 abort ();
876
877 /* Add reloc counts against the weak sym to the strong sym
878 list. Merge any entries against the same section. */
879 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
880 {
881 struct elf_s390_dyn_relocs *q;
882
883 for (q = edir->dyn_relocs; q != NULL; q = q->next)
884 if (q->sec == p->sec)
885 {
886 q->pc_count += p->pc_count;
887 q->count += p->count;
888 *pp = p->next;
889 break;
890 }
891 if (q == NULL)
892 pp = &p->next;
893 }
894 *pp = edir->dyn_relocs;
895 }
896
897 edir->dyn_relocs = eind->dyn_relocs;
898 eind->dyn_relocs = NULL;
899 }
900
901 if (ind->root.type == bfd_link_hash_indirect
902 && dir->got.refcount <= 0)
903 {
904 edir->tls_type = eind->tls_type;
905 eind->tls_type = GOT_UNKNOWN;
906 }
907
908 if (ELIMINATE_COPY_RELOCS
909 && ind->root.type != bfd_link_hash_indirect
910 && dir->dynamic_adjusted)
911 {
912 /* If called to transfer flags for a weakdef during processing
913 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
914 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
915 dir->ref_dynamic |= ind->ref_dynamic;
916 dir->ref_regular |= ind->ref_regular;
917 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
918 dir->needs_plt |= ind->needs_plt;
919 }
920 else
921 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
922 }
923
924 static int
925 elf_s390_tls_transition (info, r_type, is_local)
926 struct bfd_link_info *info;
927 int r_type;
928 int is_local;
929 {
930 if (info->shared)
931 return r_type;
932
933 switch (r_type)
934 {
935 case R_390_TLS_GD32:
936 case R_390_TLS_IE32:
937 if (is_local)
938 return R_390_TLS_LE32;
939 return R_390_TLS_IE32;
940 case R_390_TLS_GOTIE32:
941 if (is_local)
942 return R_390_TLS_LE32;
943 return R_390_TLS_GOTIE32;
944 case R_390_TLS_LDM32:
945 return R_390_TLS_LE32;
946 }
947
948 return r_type;
949 }
950
951 /* Look through the relocs for a section during the first phase, and
952 allocate space in the global offset table or procedure linkage
953 table. */
954
955 static bfd_boolean
956 elf_s390_check_relocs (abfd, info, sec, relocs)
957 bfd *abfd;
958 struct bfd_link_info *info;
959 asection *sec;
960 const Elf_Internal_Rela *relocs;
961 {
962 struct elf_s390_link_hash_table *htab;
963 Elf_Internal_Shdr *symtab_hdr;
964 struct elf_link_hash_entry **sym_hashes;
965 const Elf_Internal_Rela *rel;
966 const Elf_Internal_Rela *rel_end;
967 asection *sreloc;
968 bfd_signed_vma *local_got_refcounts;
969 int tls_type, old_tls_type;
970
971 if (info->relocatable)
972 return TRUE;
973
974 htab = elf_s390_hash_table (info);
975 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
976 sym_hashes = elf_sym_hashes (abfd);
977 local_got_refcounts = elf_local_got_refcounts (abfd);
978
979 sreloc = NULL;
980
981 rel_end = relocs + sec->reloc_count;
982 for (rel = relocs; rel < rel_end; rel++)
983 {
984 unsigned int r_type;
985 unsigned long r_symndx;
986 struct elf_link_hash_entry *h;
987
988 r_symndx = ELF32_R_SYM (rel->r_info);
989
990 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
991 {
992 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
993 abfd, r_symndx);
994 return FALSE;
995 }
996
997 if (r_symndx < symtab_hdr->sh_info)
998 h = NULL;
999 else
1000 {
1001 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1002 while (h->root.type == bfd_link_hash_indirect
1003 || h->root.type == bfd_link_hash_warning)
1004 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1005 }
1006
1007 /* Create got section and local_got_refcounts array if they
1008 are needed. */
1009 r_type = elf_s390_tls_transition (info,
1010 ELF32_R_TYPE (rel->r_info),
1011 h == NULL);
1012 switch (r_type)
1013 {
1014 case R_390_GOT12:
1015 case R_390_GOT16:
1016 case R_390_GOT20:
1017 case R_390_GOT32:
1018 case R_390_GOTENT:
1019 case R_390_GOTPLT12:
1020 case R_390_GOTPLT16:
1021 case R_390_GOTPLT20:
1022 case R_390_GOTPLT32:
1023 case R_390_GOTPLTENT:
1024 case R_390_TLS_GD32:
1025 case R_390_TLS_GOTIE12:
1026 case R_390_TLS_GOTIE20:
1027 case R_390_TLS_GOTIE32:
1028 case R_390_TLS_IEENT:
1029 case R_390_TLS_IE32:
1030 case R_390_TLS_LDM32:
1031 if (h == NULL
1032 && local_got_refcounts == NULL)
1033 {
1034 bfd_size_type size;
1035
1036 size = symtab_hdr->sh_info;
1037 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1038 local_got_refcounts = ((bfd_signed_vma *)
1039 bfd_zalloc (abfd, size));
1040 if (local_got_refcounts == NULL)
1041 return FALSE;
1042 elf_local_got_refcounts (abfd) = local_got_refcounts;
1043 elf_s390_local_got_tls_type (abfd)
1044 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1045 }
1046 /* Fall through. */
1047 case R_390_GOTOFF16:
1048 case R_390_GOTOFF32:
1049 case R_390_GOTPC:
1050 case R_390_GOTPCDBL:
1051 if (htab->sgot == NULL)
1052 {
1053 if (htab->elf.dynobj == NULL)
1054 htab->elf.dynobj = abfd;
1055 if (!create_got_section (htab->elf.dynobj, info))
1056 return FALSE;
1057 }
1058 }
1059
1060 switch (r_type)
1061 {
1062 case R_390_GOTOFF16:
1063 case R_390_GOTOFF32:
1064 case R_390_GOTPC:
1065 case R_390_GOTPCDBL:
1066 /* Got is created, nothing to be done. */
1067 break;
1068
1069 case R_390_PLT16DBL:
1070 case R_390_PLT32DBL:
1071 case R_390_PLT32:
1072 case R_390_PLTOFF16:
1073 case R_390_PLTOFF32:
1074 /* This symbol requires a procedure linkage table entry. We
1075 actually build the entry in adjust_dynamic_symbol,
1076 because this might be a case of linking PIC code which is
1077 never referenced by a dynamic object, in which case we
1078 don't need to generate a procedure linkage table entry
1079 after all. */
1080
1081 /* If this is a local symbol, we resolve it directly without
1082 creating a procedure linkage table entry. */
1083 if (h != NULL)
1084 {
1085 h->needs_plt = 1;
1086 h->plt.refcount += 1;
1087 }
1088 break;
1089
1090 case R_390_GOTPLT12:
1091 case R_390_GOTPLT16:
1092 case R_390_GOTPLT20:
1093 case R_390_GOTPLT32:
1094 case R_390_GOTPLTENT:
1095 /* This symbol requires either a procedure linkage table entry
1096 or an entry in the local got. We actually build the entry
1097 in adjust_dynamic_symbol because whether this is really a
1098 global reference can change and with it the fact if we have
1099 to create a plt entry or a local got entry. To be able to
1100 make a once global symbol a local one we have to keep track
1101 of the number of gotplt references that exist for this
1102 symbol. */
1103 if (h != NULL)
1104 {
1105 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1106 h->needs_plt = 1;
1107 h->plt.refcount += 1;
1108 }
1109 else
1110 local_got_refcounts[r_symndx] += 1;
1111 break;
1112
1113 case R_390_TLS_LDM32:
1114 htab->tls_ldm_got.refcount += 1;
1115 break;
1116
1117 case R_390_TLS_IE32:
1118 case R_390_TLS_GOTIE12:
1119 case R_390_TLS_GOTIE20:
1120 case R_390_TLS_GOTIE32:
1121 case R_390_TLS_IEENT:
1122 if (info->shared)
1123 info->flags |= DF_STATIC_TLS;
1124 /* Fall through. */
1125
1126 case R_390_GOT12:
1127 case R_390_GOT16:
1128 case R_390_GOT20:
1129 case R_390_GOT32:
1130 case R_390_GOTENT:
1131 case R_390_TLS_GD32:
1132 /* This symbol requires a global offset table entry. */
1133 switch (r_type)
1134 {
1135 default:
1136 case R_390_GOT12:
1137 case R_390_GOT16:
1138 case R_390_GOT20:
1139 case R_390_GOT32:
1140 case R_390_GOTENT:
1141 tls_type = GOT_NORMAL;
1142 break;
1143 case R_390_TLS_GD32:
1144 tls_type = GOT_TLS_GD;
1145 break;
1146 case R_390_TLS_IE32:
1147 case R_390_TLS_GOTIE32:
1148 tls_type = GOT_TLS_IE;
1149 break;
1150 case R_390_TLS_GOTIE12:
1151 case R_390_TLS_GOTIE20:
1152 case R_390_TLS_IEENT:
1153 tls_type = GOT_TLS_IE_NLT;
1154 break;
1155 }
1156
1157 if (h != NULL)
1158 {
1159 h->got.refcount += 1;
1160 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1161 }
1162 else
1163 {
1164 local_got_refcounts[r_symndx] += 1;
1165 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1166 }
1167 /* If a TLS symbol is accessed using IE at least once,
1168 there is no point to use dynamic model for it. */
1169 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1170 {
1171 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1172 {
1173 (*_bfd_error_handler)
1174 (_("%B: `%s' accessed both as normal and thread local symbol"),
1175 abfd, h->root.root.string);
1176 return FALSE;
1177 }
1178 if (old_tls_type > tls_type)
1179 tls_type = old_tls_type;
1180 }
1181
1182 if (old_tls_type != tls_type)
1183 {
1184 if (h != NULL)
1185 elf_s390_hash_entry (h)->tls_type = tls_type;
1186 else
1187 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1188 }
1189
1190 if (r_type != R_390_TLS_IE32)
1191 break;
1192 /* Fall through. */
1193
1194 case R_390_TLS_LE32:
1195 if (!info->shared)
1196 break;
1197 info->flags |= DF_STATIC_TLS;
1198 /* Fall through. */
1199
1200 case R_390_8:
1201 case R_390_16:
1202 case R_390_32:
1203 case R_390_PC16:
1204 case R_390_PC16DBL:
1205 case R_390_PC32DBL:
1206 case R_390_PC32:
1207 if (h != NULL && !info->shared)
1208 {
1209 /* If this reloc is in a read-only section, we might
1210 need a copy reloc. We can't check reliably at this
1211 stage whether the section is read-only, as input
1212 sections have not yet been mapped to output sections.
1213 Tentatively set the flag for now, and correct in
1214 adjust_dynamic_symbol. */
1215 h->non_got_ref = 1;
1216
1217 /* We may need a .plt entry if the function this reloc
1218 refers to is in a shared lib. */
1219 h->plt.refcount += 1;
1220 }
1221
1222 /* If we are creating a shared library, and this is a reloc
1223 against a global symbol, or a non PC relative reloc
1224 against a local symbol, then we need to copy the reloc
1225 into the shared library. However, if we are linking with
1226 -Bsymbolic, we do not need to copy a reloc against a
1227 global symbol which is defined in an object we are
1228 including in the link (i.e., DEF_REGULAR is set). At
1229 this point we have not seen all the input files, so it is
1230 possible that DEF_REGULAR is not set now but will be set
1231 later (it is never cleared). In case of a weak definition,
1232 DEF_REGULAR may be cleared later by a strong definition in
1233 a shared library. We account for that possibility below by
1234 storing information in the relocs_copied field of the hash
1235 table entry. A similar situation occurs when creating
1236 shared libraries and symbol visibility changes render the
1237 symbol local.
1238
1239 If on the other hand, we are creating an executable, we
1240 may need to keep relocations for symbols satisfied by a
1241 dynamic library if we manage to avoid copy relocs for the
1242 symbol. */
1243 if ((info->shared
1244 && (sec->flags & SEC_ALLOC) != 0
1245 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1246 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1247 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1248 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1249 || (h != NULL
1250 && (! info->symbolic
1251 || h->root.type == bfd_link_hash_defweak
1252 || !h->def_regular))))
1253 || (ELIMINATE_COPY_RELOCS
1254 && !info->shared
1255 && (sec->flags & SEC_ALLOC) != 0
1256 && h != NULL
1257 && (h->root.type == bfd_link_hash_defweak
1258 || !h->def_regular)))
1259 {
1260 struct elf_s390_dyn_relocs *p;
1261 struct elf_s390_dyn_relocs **head;
1262
1263 /* We must copy these reloc types into the output file.
1264 Create a reloc section in dynobj and make room for
1265 this reloc. */
1266 if (sreloc == NULL)
1267 {
1268 const char *name;
1269 bfd *dynobj;
1270
1271 name = (bfd_elf_string_from_elf_section
1272 (abfd,
1273 elf_elfheader (abfd)->e_shstrndx,
1274 elf_section_data (sec)->rel_hdr.sh_name));
1275 if (name == NULL)
1276 return FALSE;
1277
1278 if (strncmp (name, ".rela", 5) != 0
1279 || strcmp (bfd_get_section_name (abfd, sec),
1280 name + 5) != 0)
1281 {
1282 (*_bfd_error_handler)
1283 (_("%B: bad relocation section name `%s\'"),
1284 abfd, name);
1285 }
1286
1287 if (htab->elf.dynobj == NULL)
1288 htab->elf.dynobj = abfd;
1289
1290 dynobj = htab->elf.dynobj;
1291 sreloc = bfd_get_section_by_name (dynobj, name);
1292 if (sreloc == NULL)
1293 {
1294 flagword flags;
1295
1296 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1297 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1298 if ((sec->flags & SEC_ALLOC) != 0)
1299 flags |= SEC_ALLOC | SEC_LOAD;
1300 sreloc = bfd_make_section_with_flags (dynobj,
1301 name,
1302 flags);
1303 if (sreloc == NULL
1304 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1305 return FALSE;
1306 }
1307 elf_section_data (sec)->sreloc = sreloc;
1308 }
1309
1310 /* If this is a global symbol, we count the number of
1311 relocations we need for this symbol. */
1312 if (h != NULL)
1313 {
1314 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1315 }
1316 else
1317 {
1318 /* Track dynamic relocs needed for local syms too.
1319 We really need local syms available to do this
1320 easily. Oh well. */
1321 asection *s;
1322
1323 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1324 sec, r_symndx);
1325 if (s == NULL)
1326 return FALSE;
1327
1328 head = ((struct elf_s390_dyn_relocs **)
1329 &elf_section_data (s)->local_dynrel);
1330 }
1331
1332 p = *head;
1333 if (p == NULL || p->sec != sec)
1334 {
1335 bfd_size_type amt = sizeof *p;
1336
1337 p = ((struct elf_s390_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1339 if (p == NULL)
1340 return FALSE;
1341 p->next = *head;
1342 *head = p;
1343 p->sec = sec;
1344 p->count = 0;
1345 p->pc_count = 0;
1346 }
1347
1348 p->count += 1;
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1353 p->pc_count += 1;
1354 }
1355 break;
1356
1357 /* This relocation describes the C++ object vtable hierarchy.
1358 Reconstruct it for later use during GC. */
1359 case R_390_GNU_VTINHERIT:
1360 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1361 return FALSE;
1362 break;
1363
1364 /* This relocation describes which C++ vtable entries are actually
1365 used. Record for later use during GC. */
1366 case R_390_GNU_VTENTRY:
1367 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1368 return FALSE;
1369 break;
1370
1371 default:
1372 break;
1373 }
1374 }
1375
1376 return TRUE;
1377 }
1378
1379 /* Return the section that should be marked against GC for a given
1380 relocation. */
1381
1382 static asection *
1383 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1384 asection *sec;
1385 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1386 Elf_Internal_Rela *rel;
1387 struct elf_link_hash_entry *h;
1388 Elf_Internal_Sym *sym;
1389 {
1390 if (h != NULL)
1391 {
1392 switch (ELF32_R_TYPE (rel->r_info))
1393 {
1394 case R_390_GNU_VTINHERIT:
1395 case R_390_GNU_VTENTRY:
1396 break;
1397
1398 default:
1399 switch (h->root.type)
1400 {
1401 case bfd_link_hash_defined:
1402 case bfd_link_hash_defweak:
1403 return h->root.u.def.section;
1404
1405 case bfd_link_hash_common:
1406 return h->root.u.c.p->section;
1407
1408 default:
1409 break;
1410 }
1411 }
1412 }
1413 else
1414 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1415
1416 return NULL;
1417 }
1418
1419 /* Update the got entry reference counts for the section being removed. */
1420
1421 static bfd_boolean
1422 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1423 bfd *abfd;
1424 struct bfd_link_info *info;
1425 asection *sec;
1426 const Elf_Internal_Rela *relocs;
1427 {
1428 Elf_Internal_Shdr *symtab_hdr;
1429 struct elf_link_hash_entry **sym_hashes;
1430 bfd_signed_vma *local_got_refcounts;
1431 const Elf_Internal_Rela *rel, *relend;
1432
1433 elf_section_data (sec)->local_dynrel = NULL;
1434
1435 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1436 sym_hashes = elf_sym_hashes (abfd);
1437 local_got_refcounts = elf_local_got_refcounts (abfd);
1438
1439 relend = relocs + sec->reloc_count;
1440 for (rel = relocs; rel < relend; rel++)
1441 {
1442 unsigned long r_symndx;
1443 unsigned int r_type;
1444 struct elf_link_hash_entry *h = NULL;
1445
1446 r_symndx = ELF32_R_SYM (rel->r_info);
1447 if (r_symndx >= symtab_hdr->sh_info)
1448 {
1449 struct elf_s390_link_hash_entry *eh;
1450 struct elf_s390_dyn_relocs **pp;
1451 struct elf_s390_dyn_relocs *p;
1452
1453 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1454 while (h->root.type == bfd_link_hash_indirect
1455 || h->root.type == bfd_link_hash_warning)
1456 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1457 eh = (struct elf_s390_link_hash_entry *) h;
1458
1459 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1460 if (p->sec == sec)
1461 {
1462 /* Everything must go for SEC. */
1463 *pp = p->next;
1464 break;
1465 }
1466 }
1467
1468 r_type = ELF32_R_TYPE (rel->r_info);
1469 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1470 switch (r_type)
1471 {
1472 case R_390_TLS_LDM32:
1473 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1474 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1475 break;
1476
1477 case R_390_TLS_GD32:
1478 case R_390_TLS_IE32:
1479 case R_390_TLS_GOTIE12:
1480 case R_390_TLS_GOTIE20:
1481 case R_390_TLS_GOTIE32:
1482 case R_390_TLS_IEENT:
1483 case R_390_GOT12:
1484 case R_390_GOT16:
1485 case R_390_GOT20:
1486 case R_390_GOT32:
1487 case R_390_GOTOFF16:
1488 case R_390_GOTOFF32:
1489 case R_390_GOTPC:
1490 case R_390_GOTPCDBL:
1491 case R_390_GOTENT:
1492 if (h != NULL)
1493 {
1494 if (h->got.refcount > 0)
1495 h->got.refcount -= 1;
1496 }
1497 else if (local_got_refcounts != NULL)
1498 {
1499 if (local_got_refcounts[r_symndx] > 0)
1500 local_got_refcounts[r_symndx] -= 1;
1501 }
1502 break;
1503
1504 case R_390_8:
1505 case R_390_12:
1506 case R_390_16:
1507 case R_390_20:
1508 case R_390_32:
1509 case R_390_PC16:
1510 case R_390_PC16DBL:
1511 case R_390_PC32DBL:
1512 case R_390_PC32:
1513 if (info->shared)
1514 break;
1515 /* Fall through. */
1516
1517 case R_390_PLT16DBL:
1518 case R_390_PLT32DBL:
1519 case R_390_PLT32:
1520 case R_390_PLTOFF16:
1521 case R_390_PLTOFF32:
1522 if (h != NULL)
1523 {
1524 if (h->plt.refcount > 0)
1525 h->plt.refcount -= 1;
1526 }
1527 break;
1528
1529 case R_390_GOTPLT12:
1530 case R_390_GOTPLT16:
1531 case R_390_GOTPLT20:
1532 case R_390_GOTPLT32:
1533 case R_390_GOTPLTENT:
1534 if (h != NULL)
1535 {
1536 if (h->plt.refcount > 0)
1537 {
1538 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1539 h->plt.refcount -= 1;
1540 }
1541 }
1542 else if (local_got_refcounts != NULL)
1543 {
1544 if (local_got_refcounts[r_symndx] > 0)
1545 local_got_refcounts[r_symndx] -= 1;
1546 }
1547 break;
1548
1549 default:
1550 break;
1551 }
1552 }
1553
1554 return TRUE;
1555 }
1556
1557 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1558 entry but we found we will not create any. Called when we find we will
1559 not have any PLT for this symbol, by for example
1560 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1561 or elf_s390_size_dynamic_sections if no dynamic sections will be
1562 created (we're only linking static objects). */
1563
1564 static void
1565 elf_s390_adjust_gotplt (h)
1566 struct elf_s390_link_hash_entry *h;
1567 {
1568 if (h->elf.root.type == bfd_link_hash_warning)
1569 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1570
1571 if (h->gotplt_refcount <= 0)
1572 return;
1573
1574 /* We simply add the number of gotplt references to the number
1575 * of got references for this symbol. */
1576 h->elf.got.refcount += h->gotplt_refcount;
1577 h->gotplt_refcount = -1;
1578 }
1579
1580 /* Adjust a symbol defined by a dynamic object and referenced by a
1581 regular object. The current definition is in some section of the
1582 dynamic object, but we're not including those sections. We have to
1583 change the definition to something the rest of the link can
1584 understand. */
1585
1586 static bfd_boolean
1587 elf_s390_adjust_dynamic_symbol (info, h)
1588 struct bfd_link_info *info;
1589 struct elf_link_hash_entry *h;
1590 {
1591 struct elf_s390_link_hash_table *htab;
1592 asection *s;
1593 unsigned int power_of_two;
1594
1595 /* If this is a function, put it in the procedure linkage table. We
1596 will fill in the contents of the procedure linkage table later
1597 (although we could actually do it here). */
1598 if (h->type == STT_FUNC
1599 || h->needs_plt)
1600 {
1601 if (h->plt.refcount <= 0
1602 || (! info->shared
1603 && !h->def_dynamic
1604 && !h->ref_dynamic
1605 && h->root.type != bfd_link_hash_undefweak
1606 && h->root.type != bfd_link_hash_undefined))
1607 {
1608 /* This case can occur if we saw a PLT32 reloc in an input
1609 file, but the symbol was never referred to by a dynamic
1610 object, or if all references were garbage collected. In
1611 such a case, we don't actually need to build a procedure
1612 linkage table, and we can just do a PC32 reloc instead. */
1613 h->plt.offset = (bfd_vma) -1;
1614 h->needs_plt = 0;
1615 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1616 }
1617
1618 return TRUE;
1619 }
1620 else
1621 /* It's possible that we incorrectly decided a .plt reloc was
1622 needed for an R_390_PC32 reloc to a non-function sym in
1623 check_relocs. We can't decide accurately between function and
1624 non-function syms in check-relocs; Objects loaded later in
1625 the link may change h->type. So fix it now. */
1626 h->plt.offset = (bfd_vma) -1;
1627
1628 /* If this is a weak symbol, and there is a real definition, the
1629 processor independent code will have arranged for us to see the
1630 real definition first, and we can just use the same value. */
1631 if (h->u.weakdef != NULL)
1632 {
1633 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1634 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1635 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1636 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1637 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1638 h->non_got_ref = h->u.weakdef->non_got_ref;
1639 return TRUE;
1640 }
1641
1642 /* This is a reference to a symbol defined by a dynamic object which
1643 is not a function. */
1644
1645 /* If we are creating a shared library, we must presume that the
1646 only references to the symbol are via the global offset table.
1647 For such cases we need not do anything here; the relocations will
1648 be handled correctly by relocate_section. */
1649 if (info->shared)
1650 return TRUE;
1651
1652 /* If there are no references to this symbol that do not use the
1653 GOT, we don't need to generate a copy reloc. */
1654 if (!h->non_got_ref)
1655 return TRUE;
1656
1657 /* If -z nocopyreloc was given, we won't generate them either. */
1658 if (info->nocopyreloc)
1659 {
1660 h->non_got_ref = 0;
1661 return TRUE;
1662 }
1663
1664 if (ELIMINATE_COPY_RELOCS)
1665 {
1666 struct elf_s390_link_hash_entry * eh;
1667 struct elf_s390_dyn_relocs *p;
1668
1669 eh = (struct elf_s390_link_hash_entry *) h;
1670 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1671 {
1672 s = p->sec->output_section;
1673 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1674 break;
1675 }
1676
1677 /* If we didn't find any dynamic relocs in read-only sections, then
1678 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1679 if (p == NULL)
1680 {
1681 h->non_got_ref = 0;
1682 return TRUE;
1683 }
1684 }
1685
1686 if (h->size == 0)
1687 {
1688 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1689 h->root.root.string);
1690 return TRUE;
1691 }
1692
1693 /* We must allocate the symbol in our .dynbss section, which will
1694 become part of the .bss section of the executable. There will be
1695 an entry for this symbol in the .dynsym section. The dynamic
1696 object will contain position independent code, so all references
1697 from the dynamic object to this symbol will go through the global
1698 offset table. The dynamic linker will use the .dynsym entry to
1699 determine the address it must put in the global offset table, so
1700 both the dynamic object and the regular object will refer to the
1701 same memory location for the variable. */
1702
1703 htab = elf_s390_hash_table (info);
1704
1705 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1706 copy the initial value out of the dynamic object and into the
1707 runtime process image. */
1708 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1709 {
1710 htab->srelbss->size += sizeof (Elf32_External_Rela);
1711 h->needs_copy = 1;
1712 }
1713
1714 /* We need to figure out the alignment required for this symbol. I
1715 have no idea how ELF linkers handle this. */
1716 power_of_two = bfd_log2 (h->size);
1717 if (power_of_two > 3)
1718 power_of_two = 3;
1719
1720 /* Apply the required alignment. */
1721 s = htab->sdynbss;
1722 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1723 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1724 {
1725 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1726 return FALSE;
1727 }
1728
1729 /* Define the symbol as being at this point in the section. */
1730 h->root.u.def.section = s;
1731 h->root.u.def.value = s->size;
1732
1733 /* Increment the section size to make room for the symbol. */
1734 s->size += h->size;
1735
1736 return TRUE;
1737 }
1738
1739 /* Allocate space in .plt, .got and associated reloc sections for
1740 dynamic relocs. */
1741
1742 static bfd_boolean
1743 allocate_dynrelocs (h, inf)
1744 struct elf_link_hash_entry *h;
1745 PTR inf;
1746 {
1747 struct bfd_link_info *info;
1748 struct elf_s390_link_hash_table *htab;
1749 struct elf_s390_link_hash_entry *eh;
1750 struct elf_s390_dyn_relocs *p;
1751
1752 if (h->root.type == bfd_link_hash_indirect)
1753 return TRUE;
1754
1755 if (h->root.type == bfd_link_hash_warning)
1756 /* When warning symbols are created, they **replace** the "real"
1757 entry in the hash table, thus we never get to see the real
1758 symbol in a hash traversal. So look at it now. */
1759 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1760
1761 info = (struct bfd_link_info *) inf;
1762 htab = elf_s390_hash_table (info);
1763
1764 if (htab->elf.dynamic_sections_created
1765 && h->plt.refcount > 0
1766 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1767 || h->root.type != bfd_link_hash_undefweak))
1768 {
1769 /* Make sure this symbol is output as a dynamic symbol.
1770 Undefined weak syms won't yet be marked as dynamic. */
1771 if (h->dynindx == -1
1772 && !h->forced_local)
1773 {
1774 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1775 return FALSE;
1776 }
1777
1778 if (info->shared
1779 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1780 {
1781 asection *s = htab->splt;
1782
1783 /* If this is the first .plt entry, make room for the special
1784 first entry. */
1785 if (s->size == 0)
1786 s->size += PLT_FIRST_ENTRY_SIZE;
1787
1788 h->plt.offset = s->size;
1789
1790 /* If this symbol is not defined in a regular file, and we are
1791 not generating a shared library, then set the symbol to this
1792 location in the .plt. This is required to make function
1793 pointers compare as equal between the normal executable and
1794 the shared library. */
1795 if (! info->shared
1796 && !h->def_regular)
1797 {
1798 h->root.u.def.section = s;
1799 h->root.u.def.value = h->plt.offset;
1800 }
1801
1802 /* Make room for this entry. */
1803 s->size += PLT_ENTRY_SIZE;
1804
1805 /* We also need to make an entry in the .got.plt section, which
1806 will be placed in the .got section by the linker script. */
1807 htab->sgotplt->size += GOT_ENTRY_SIZE;
1808
1809 /* We also need to make an entry in the .rela.plt section. */
1810 htab->srelplt->size += sizeof (Elf32_External_Rela);
1811 }
1812 else
1813 {
1814 h->plt.offset = (bfd_vma) -1;
1815 h->needs_plt = 0;
1816 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1817 }
1818 }
1819 else
1820 {
1821 h->plt.offset = (bfd_vma) -1;
1822 h->needs_plt = 0;
1823 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1824 }
1825
1826 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1827 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1828 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1829 we can save the dynamic TLS relocation. */
1830 if (h->got.refcount > 0
1831 && !info->shared
1832 && h->dynindx == -1
1833 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1834 {
1835 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1836 /* For the GOTIE access without a literal pool entry the offset has
1837 to be stored somewhere. The immediate value in the instruction
1838 is not bit enough so the value is stored in the got. */
1839 {
1840 h->got.offset = htab->sgot->size;
1841 htab->sgot->size += GOT_ENTRY_SIZE;
1842 }
1843 else
1844 h->got.offset = (bfd_vma) -1;
1845 }
1846 else if (h->got.refcount > 0)
1847 {
1848 asection *s;
1849 bfd_boolean dyn;
1850 int tls_type = elf_s390_hash_entry(h)->tls_type;
1851
1852 /* Make sure this symbol is output as a dynamic symbol.
1853 Undefined weak syms won't yet be marked as dynamic. */
1854 if (h->dynindx == -1
1855 && !h->forced_local)
1856 {
1857 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1858 return FALSE;
1859 }
1860
1861 s = htab->sgot;
1862 h->got.offset = s->size;
1863 s->size += GOT_ENTRY_SIZE;
1864 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1865 if (tls_type == GOT_TLS_GD)
1866 s->size += GOT_ENTRY_SIZE;
1867 dyn = htab->elf.dynamic_sections_created;
1868 /* R_390_TLS_IE32 needs one dynamic relocation,
1869 R_390_TLS_GD32 needs one if local symbol and two if global. */
1870 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1871 || tls_type >= GOT_TLS_IE)
1872 htab->srelgot->size += sizeof (Elf32_External_Rela);
1873 else if (tls_type == GOT_TLS_GD)
1874 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1875 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1876 || h->root.type != bfd_link_hash_undefweak)
1877 && (info->shared
1878 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1879 htab->srelgot->size += sizeof (Elf32_External_Rela);
1880 }
1881 else
1882 h->got.offset = (bfd_vma) -1;
1883
1884 eh = (struct elf_s390_link_hash_entry *) h;
1885 if (eh->dyn_relocs == NULL)
1886 return TRUE;
1887
1888 /* In the shared -Bsymbolic case, discard space allocated for
1889 dynamic pc-relative relocs against symbols which turn out to be
1890 defined in regular objects. For the normal shared case, discard
1891 space for pc-relative relocs that have become local due to symbol
1892 visibility changes. */
1893
1894 if (info->shared)
1895 {
1896 if (SYMBOL_REFERENCES_LOCAL (info, h))
1897 {
1898 struct elf_s390_dyn_relocs **pp;
1899
1900 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1901 {
1902 p->count -= p->pc_count;
1903 p->pc_count = 0;
1904 if (p->count == 0)
1905 *pp = p->next;
1906 else
1907 pp = &p->next;
1908 }
1909 }
1910
1911 /* Also discard relocs on undefined weak syms with non-default
1912 visibility. */
1913 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1914 && h->root.type == bfd_link_hash_undefweak)
1915 eh->dyn_relocs = NULL;
1916 }
1917 else if (ELIMINATE_COPY_RELOCS)
1918 {
1919 /* For the non-shared case, discard space for relocs against
1920 symbols which turn out to need copy relocs or are not
1921 dynamic. */
1922
1923 if (!h->non_got_ref
1924 && ((h->def_dynamic
1925 && !h->def_regular)
1926 || (htab->elf.dynamic_sections_created
1927 && (h->root.type == bfd_link_hash_undefweak
1928 || h->root.type == bfd_link_hash_undefined))))
1929 {
1930 /* Make sure this symbol is output as a dynamic symbol.
1931 Undefined weak syms won't yet be marked as dynamic. */
1932 if (h->dynindx == -1
1933 && !h->forced_local)
1934 {
1935 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1936 return FALSE;
1937 }
1938
1939 /* If that succeeded, we know we'll be keeping all the
1940 relocs. */
1941 if (h->dynindx != -1)
1942 goto keep;
1943 }
1944
1945 eh->dyn_relocs = NULL;
1946
1947 keep: ;
1948 }
1949
1950 /* Finally, allocate space. */
1951 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1952 {
1953 asection *sreloc = elf_section_data (p->sec)->sreloc;
1954
1955 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1956 }
1957
1958 return TRUE;
1959 }
1960
1961 /* Find any dynamic relocs that apply to read-only sections. */
1962
1963 static bfd_boolean
1964 readonly_dynrelocs (h, inf)
1965 struct elf_link_hash_entry *h;
1966 PTR inf;
1967 {
1968 struct elf_s390_link_hash_entry *eh;
1969 struct elf_s390_dyn_relocs *p;
1970
1971 if (h->root.type == bfd_link_hash_warning)
1972 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1973
1974 eh = (struct elf_s390_link_hash_entry *) h;
1975 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1976 {
1977 asection *s = p->sec->output_section;
1978
1979 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1980 {
1981 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1982
1983 info->flags |= DF_TEXTREL;
1984
1985 /* Not an error, just cut short the traversal. */
1986 return FALSE;
1987 }
1988 }
1989 return TRUE;
1990 }
1991
1992 /* Set the sizes of the dynamic sections. */
1993
1994 static bfd_boolean
1995 elf_s390_size_dynamic_sections (output_bfd, info)
1996 bfd *output_bfd ATTRIBUTE_UNUSED;
1997 struct bfd_link_info *info;
1998 {
1999 struct elf_s390_link_hash_table *htab;
2000 bfd *dynobj;
2001 asection *s;
2002 bfd_boolean relocs;
2003 bfd *ibfd;
2004
2005 htab = elf_s390_hash_table (info);
2006 dynobj = htab->elf.dynobj;
2007 if (dynobj == NULL)
2008 abort ();
2009
2010 if (htab->elf.dynamic_sections_created)
2011 {
2012 /* Set the contents of the .interp section to the interpreter. */
2013 if (info->executable)
2014 {
2015 s = bfd_get_section_by_name (dynobj, ".interp");
2016 if (s == NULL)
2017 abort ();
2018 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2019 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2020 }
2021 }
2022
2023 /* Set up .got offsets for local syms, and space for local dynamic
2024 relocs. */
2025 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2026 {
2027 bfd_signed_vma *local_got;
2028 bfd_signed_vma *end_local_got;
2029 char *local_tls_type;
2030 bfd_size_type locsymcount;
2031 Elf_Internal_Shdr *symtab_hdr;
2032 asection *srela;
2033
2034 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2035 continue;
2036
2037 for (s = ibfd->sections; s != NULL; s = s->next)
2038 {
2039 struct elf_s390_dyn_relocs *p;
2040
2041 for (p = *((struct elf_s390_dyn_relocs **)
2042 &elf_section_data (s)->local_dynrel);
2043 p != NULL;
2044 p = p->next)
2045 {
2046 if (!bfd_is_abs_section (p->sec)
2047 && bfd_is_abs_section (p->sec->output_section))
2048 {
2049 /* Input section has been discarded, either because
2050 it is a copy of a linkonce section or due to
2051 linker script /DISCARD/, so we'll be discarding
2052 the relocs too. */
2053 }
2054 else if (p->count != 0)
2055 {
2056 srela = elf_section_data (p->sec)->sreloc;
2057 srela->size += p->count * sizeof (Elf32_External_Rela);
2058 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2059 info->flags |= DF_TEXTREL;
2060 }
2061 }
2062 }
2063
2064 local_got = elf_local_got_refcounts (ibfd);
2065 if (!local_got)
2066 continue;
2067
2068 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2069 locsymcount = symtab_hdr->sh_info;
2070 end_local_got = local_got + locsymcount;
2071 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2072 s = htab->sgot;
2073 srela = htab->srelgot;
2074 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2075 {
2076 if (*local_got > 0)
2077 {
2078 *local_got = s->size;
2079 s->size += GOT_ENTRY_SIZE;
2080 if (*local_tls_type == GOT_TLS_GD)
2081 s->size += GOT_ENTRY_SIZE;
2082 if (info->shared)
2083 srela->size += sizeof (Elf32_External_Rela);
2084 }
2085 else
2086 *local_got = (bfd_vma) -1;
2087 }
2088 }
2089
2090 if (htab->tls_ldm_got.refcount > 0)
2091 {
2092 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2093 relocs. */
2094 htab->tls_ldm_got.offset = htab->sgot->size;
2095 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2096 htab->srelgot->size += sizeof (Elf32_External_Rela);
2097 }
2098 else
2099 htab->tls_ldm_got.offset = -1;
2100
2101 /* Allocate global sym .plt and .got entries, and space for global
2102 sym dynamic relocs. */
2103 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2104
2105 /* We now have determined the sizes of the various dynamic sections.
2106 Allocate memory for them. */
2107 relocs = FALSE;
2108 for (s = dynobj->sections; s != NULL; s = s->next)
2109 {
2110 if ((s->flags & SEC_LINKER_CREATED) == 0)
2111 continue;
2112
2113 if (s == htab->splt
2114 || s == htab->sgot
2115 || s == htab->sgotplt
2116 || s == htab->sdynbss)
2117 {
2118 /* Strip this section if we don't need it; see the
2119 comment below. */
2120 }
2121 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2122 {
2123 if (s->size != 0)
2124 relocs = TRUE;
2125
2126 /* We use the reloc_count field as a counter if we need
2127 to copy relocs into the output file. */
2128 s->reloc_count = 0;
2129 }
2130 else
2131 {
2132 /* It's not one of our sections, so don't allocate space. */
2133 continue;
2134 }
2135
2136 if (s->size == 0)
2137 {
2138 /* If we don't need this section, strip it from the
2139 output file. This is to handle .rela.bss and
2140 .rela.plt. We must create it in
2141 create_dynamic_sections, because it must be created
2142 before the linker maps input sections to output
2143 sections. The linker does that before
2144 adjust_dynamic_symbol is called, and it is that
2145 function which decides whether anything needs to go
2146 into these sections. */
2147
2148 s->flags |= SEC_EXCLUDE;
2149 continue;
2150 }
2151
2152 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2153 continue;
2154
2155 /* Allocate memory for the section contents. We use bfd_zalloc
2156 here in case unused entries are not reclaimed before the
2157 section's contents are written out. This should not happen,
2158 but this way if it does, we get a R_390_NONE reloc instead
2159 of garbage. */
2160 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2161 if (s->contents == NULL)
2162 return FALSE;
2163 }
2164
2165 if (htab->elf.dynamic_sections_created)
2166 {
2167 /* Add some entries to the .dynamic section. We fill in the
2168 values later, in elf_s390_finish_dynamic_sections, but we
2169 must add the entries now so that we get the correct size for
2170 the .dynamic section. The DT_DEBUG entry is filled in by the
2171 dynamic linker and used by the debugger. */
2172 #define add_dynamic_entry(TAG, VAL) \
2173 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2174
2175 if (info->executable)
2176 {
2177 if (!add_dynamic_entry (DT_DEBUG, 0))
2178 return FALSE;
2179 }
2180
2181 if (htab->splt->size != 0)
2182 {
2183 if (!add_dynamic_entry (DT_PLTGOT, 0)
2184 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2185 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2186 || !add_dynamic_entry (DT_JMPREL, 0))
2187 return FALSE;
2188 }
2189
2190 if (relocs)
2191 {
2192 if (!add_dynamic_entry (DT_RELA, 0)
2193 || !add_dynamic_entry (DT_RELASZ, 0)
2194 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2195 return FALSE;
2196
2197 /* If any dynamic relocs apply to a read-only section,
2198 then we need a DT_TEXTREL entry. */
2199 if ((info->flags & DF_TEXTREL) == 0)
2200 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2201 (PTR) info);
2202
2203 if ((info->flags & DF_TEXTREL) != 0)
2204 {
2205 if (!add_dynamic_entry (DT_TEXTREL, 0))
2206 return FALSE;
2207 }
2208 }
2209 }
2210 #undef add_dynamic_entry
2211
2212 return TRUE;
2213 }
2214
2215 /* Return the base VMA address which should be subtracted from real addresses
2216 when resolving @dtpoff relocation.
2217 This is PT_TLS segment p_vaddr. */
2218
2219 static bfd_vma
2220 dtpoff_base (info)
2221 struct bfd_link_info *info;
2222 {
2223 /* If tls_sec is NULL, we should have signalled an error already. */
2224 if (elf_hash_table (info)->tls_sec == NULL)
2225 return 0;
2226 return elf_hash_table (info)->tls_sec->vma;
2227 }
2228
2229 /* Return the relocation value for @tpoff relocation
2230 if STT_TLS virtual address is ADDRESS. */
2231
2232 static bfd_vma
2233 tpoff (info, address)
2234 struct bfd_link_info *info;
2235 bfd_vma address;
2236 {
2237 struct elf_link_hash_table *htab = elf_hash_table (info);
2238
2239 /* If tls_sec is NULL, we should have signalled an error already. */
2240 if (htab->tls_sec == NULL)
2241 return 0;
2242 return htab->tls_size + htab->tls_sec->vma - address;
2243 }
2244
2245 /* Complain if TLS instruction relocation is against an invalid
2246 instruction. */
2247
2248 static void
2249 invalid_tls_insn (input_bfd, input_section, rel)
2250 bfd *input_bfd;
2251 asection *input_section;
2252 Elf_Internal_Rela *rel;
2253 {
2254 reloc_howto_type *howto;
2255
2256 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2257 (*_bfd_error_handler)
2258 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2259 input_bfd,
2260 input_section,
2261 (long) rel->r_offset,
2262 howto->name);
2263 }
2264
2265 /* Relocate a 390 ELF section. */
2266
2267 static bfd_boolean
2268 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2269 contents, relocs, local_syms, local_sections)
2270 bfd *output_bfd;
2271 struct bfd_link_info *info;
2272 bfd *input_bfd;
2273 asection *input_section;
2274 bfd_byte *contents;
2275 Elf_Internal_Rela *relocs;
2276 Elf_Internal_Sym *local_syms;
2277 asection **local_sections;
2278 {
2279 struct elf_s390_link_hash_table *htab;
2280 Elf_Internal_Shdr *symtab_hdr;
2281 struct elf_link_hash_entry **sym_hashes;
2282 bfd_vma *local_got_offsets;
2283 Elf_Internal_Rela *rel;
2284 Elf_Internal_Rela *relend;
2285
2286 if (info->relocatable)
2287 return TRUE;
2288
2289 htab = elf_s390_hash_table (info);
2290 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2291 sym_hashes = elf_sym_hashes (input_bfd);
2292 local_got_offsets = elf_local_got_offsets (input_bfd);
2293
2294 rel = relocs;
2295 relend = relocs + input_section->reloc_count;
2296 for (; rel < relend; rel++)
2297 {
2298 unsigned int r_type;
2299 reloc_howto_type *howto;
2300 unsigned long r_symndx;
2301 struct elf_link_hash_entry *h;
2302 Elf_Internal_Sym *sym;
2303 asection *sec;
2304 bfd_vma off;
2305 bfd_vma relocation;
2306 bfd_boolean unresolved_reloc;
2307 bfd_reloc_status_type r;
2308 int tls_type;
2309
2310 r_type = ELF32_R_TYPE (rel->r_info);
2311 if (r_type == (int) R_390_GNU_VTINHERIT
2312 || r_type == (int) R_390_GNU_VTENTRY)
2313 continue;
2314 if (r_type >= (int) R_390_max)
2315 {
2316 bfd_set_error (bfd_error_bad_value);
2317 return FALSE;
2318 }
2319
2320 howto = elf_howto_table + r_type;
2321 r_symndx = ELF32_R_SYM (rel->r_info);
2322
2323 /* This is a final link. */
2324 h = NULL;
2325 sym = NULL;
2326 sec = NULL;
2327 unresolved_reloc = FALSE;
2328 if (r_symndx < symtab_hdr->sh_info)
2329 {
2330 sym = local_syms + r_symndx;
2331 sec = local_sections[r_symndx];
2332 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2333 }
2334 else
2335 {
2336 bfd_boolean warned ATTRIBUTE_UNUSED;
2337
2338 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2339 r_symndx, symtab_hdr, sym_hashes,
2340 h, sec, relocation,
2341 unresolved_reloc, warned);
2342 }
2343
2344 switch (r_type)
2345 {
2346 case R_390_GOTPLT12:
2347 case R_390_GOTPLT16:
2348 case R_390_GOTPLT20:
2349 case R_390_GOTPLT32:
2350 case R_390_GOTPLTENT:
2351 /* There are three cases for a GOTPLT relocation. 1) The
2352 relocation is against the jump slot entry of a plt that
2353 will get emitted to the output file. 2) The relocation
2354 is against the jump slot of a plt entry that has been
2355 removed. elf_s390_adjust_gotplt has created a GOT entry
2356 as replacement. 3) The relocation is against a local symbol.
2357 Cases 2) and 3) are the same as the GOT relocation code
2358 so we just have to test for case 1 and fall through for
2359 the other two. */
2360 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2361 {
2362 bfd_vma plt_index;
2363
2364 /* Calc. index no.
2365 Current offset - size first entry / entry size. */
2366 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2367 PLT_ENTRY_SIZE;
2368
2369 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2370 addr & GOT addr. */
2371 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2372 unresolved_reloc = FALSE;
2373
2374 if (r_type == R_390_GOTPLTENT)
2375 relocation += htab->sgot->output_section->vma;
2376 break;
2377 }
2378 /* Fall through. */
2379
2380 case R_390_GOT12:
2381 case R_390_GOT16:
2382 case R_390_GOT20:
2383 case R_390_GOT32:
2384 case R_390_GOTENT:
2385 /* Relocation is to the entry for this symbol in the global
2386 offset table. */
2387 if (htab->sgot == NULL)
2388 abort ();
2389
2390 if (h != NULL)
2391 {
2392 bfd_boolean dyn;
2393
2394 off = h->got.offset;
2395 dyn = htab->elf.dynamic_sections_created;
2396 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2397 || (info->shared
2398 && (info->symbolic
2399 || h->dynindx == -1
2400 || h->forced_local)
2401 && h->def_regular)
2402 || (ELF_ST_VISIBILITY (h->other)
2403 && h->root.type == bfd_link_hash_undefweak))
2404 {
2405 /* This is actually a static link, or it is a
2406 -Bsymbolic link and the symbol is defined
2407 locally, or the symbol was forced to be local
2408 because of a version file. We must initialize
2409 this entry in the global offset table. Since the
2410 offset must always be a multiple of 2, we use the
2411 least significant bit to record whether we have
2412 initialized it already.
2413
2414 When doing a dynamic link, we create a .rel.got
2415 relocation entry to initialize the value. This
2416 is done in the finish_dynamic_symbol routine. */
2417 if ((off & 1) != 0)
2418 off &= ~1;
2419 else
2420 {
2421 bfd_put_32 (output_bfd, relocation,
2422 htab->sgot->contents + off);
2423 h->got.offset |= 1;
2424 }
2425 }
2426 else
2427 unresolved_reloc = FALSE;
2428 }
2429 else
2430 {
2431 if (local_got_offsets == NULL)
2432 abort ();
2433
2434 off = local_got_offsets[r_symndx];
2435
2436 /* The offset must always be a multiple of 4. We use
2437 the least significant bit to record whether we have
2438 already generated the necessary reloc. */
2439 if ((off & 1) != 0)
2440 off &= ~1;
2441 else
2442 {
2443 bfd_put_32 (output_bfd, relocation,
2444 htab->sgot->contents + off);
2445
2446 if (info->shared)
2447 {
2448 asection *srelgot;
2449 Elf_Internal_Rela outrel;
2450 bfd_byte *loc;
2451
2452 srelgot = htab->srelgot;
2453 if (srelgot == NULL)
2454 abort ();
2455
2456 outrel.r_offset = (htab->sgot->output_section->vma
2457 + htab->sgot->output_offset
2458 + off);
2459 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2460 outrel.r_addend = relocation;
2461 loc = srelgot->contents;
2462 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2463 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2464 }
2465
2466 local_got_offsets[r_symndx] |= 1;
2467 }
2468 }
2469
2470 if (off >= (bfd_vma) -2)
2471 abort ();
2472
2473 relocation = htab->sgot->output_offset + off;
2474
2475 /* For @GOTENT the relocation is against the offset between
2476 the instruction and the symbols entry in the GOT and not
2477 between the start of the GOT and the symbols entry. We
2478 add the vma of the GOT to get the correct value. */
2479 if ( r_type == R_390_GOTENT
2480 || r_type == R_390_GOTPLTENT)
2481 relocation += htab->sgot->output_section->vma;
2482
2483 break;
2484
2485 case R_390_GOTOFF16:
2486 case R_390_GOTOFF32:
2487 /* Relocation is relative to the start of the global offset
2488 table. */
2489
2490 /* Note that sgot->output_offset is not involved in this
2491 calculation. We always want the start of .got. If we
2492 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2493 permitted by the ABI, we might have to change this
2494 calculation. */
2495 relocation -= htab->sgot->output_section->vma;
2496 break;
2497
2498 case R_390_GOTPC:
2499 case R_390_GOTPCDBL:
2500 /* Use global offset table as symbol value. */
2501 relocation = htab->sgot->output_section->vma;
2502 unresolved_reloc = FALSE;
2503 break;
2504
2505 case R_390_PLT16DBL:
2506 case R_390_PLT32DBL:
2507 case R_390_PLT32:
2508 /* Relocation is to the entry for this symbol in the
2509 procedure linkage table. */
2510
2511 /* Resolve a PLT32 reloc against a local symbol directly,
2512 without using the procedure linkage table. */
2513 if (h == NULL)
2514 break;
2515
2516 if (h->plt.offset == (bfd_vma) -1
2517 || htab->splt == NULL)
2518 {
2519 /* We didn't make a PLT entry for this symbol. This
2520 happens when statically linking PIC code, or when
2521 using -Bsymbolic. */
2522 break;
2523 }
2524
2525 relocation = (htab->splt->output_section->vma
2526 + htab->splt->output_offset
2527 + h->plt.offset);
2528 unresolved_reloc = FALSE;
2529 break;
2530
2531 case R_390_PLTOFF16:
2532 case R_390_PLTOFF32:
2533 /* Relocation is to the entry for this symbol in the
2534 procedure linkage table relative to the start of the GOT. */
2535
2536 /* For local symbols or if we didn't make a PLT entry for
2537 this symbol resolve the symbol directly. */
2538 if ( h == NULL
2539 || h->plt.offset == (bfd_vma) -1
2540 || htab->splt == NULL)
2541 {
2542 relocation -= htab->sgot->output_section->vma;
2543 break;
2544 }
2545
2546 relocation = (htab->splt->output_section->vma
2547 + htab->splt->output_offset
2548 + h->plt.offset
2549 - htab->sgot->output_section->vma);
2550 unresolved_reloc = FALSE;
2551 break;
2552
2553 case R_390_8:
2554 case R_390_16:
2555 case R_390_32:
2556 case R_390_PC16:
2557 case R_390_PC16DBL:
2558 case R_390_PC32DBL:
2559 case R_390_PC32:
2560 /* r_symndx will be zero only for relocs against symbols
2561 from removed linkonce sections, or sections discarded by
2562 a linker script. */
2563 if (r_symndx == 0
2564 || (input_section->flags & SEC_ALLOC) == 0)
2565 break;
2566
2567 if ((info->shared
2568 && (h == NULL
2569 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2570 || h->root.type != bfd_link_hash_undefweak)
2571 && ((r_type != R_390_PC16
2572 && r_type != R_390_PC16DBL
2573 && r_type != R_390_PC32DBL
2574 && r_type != R_390_PC32)
2575 || (h != NULL
2576 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2577 || (ELIMINATE_COPY_RELOCS
2578 && !info->shared
2579 && h != NULL
2580 && h->dynindx != -1
2581 && !h->non_got_ref
2582 && ((h->def_dynamic
2583 && !h->def_regular)
2584 || h->root.type == bfd_link_hash_undefweak
2585 || h->root.type == bfd_link_hash_undefined)))
2586 {
2587 Elf_Internal_Rela outrel;
2588 bfd_boolean skip, relocate;
2589 asection *sreloc;
2590 bfd_byte *loc;
2591
2592 /* When generating a shared object, these relocations
2593 are copied into the output file to be resolved at run
2594 time. */
2595
2596 skip = FALSE;
2597 relocate = FALSE;
2598
2599 outrel.r_offset =
2600 _bfd_elf_section_offset (output_bfd, info, input_section,
2601 rel->r_offset);
2602 if (outrel.r_offset == (bfd_vma) -1)
2603 skip = TRUE;
2604 else if (outrel.r_offset == (bfd_vma) -2)
2605 skip = TRUE, relocate = TRUE;
2606 outrel.r_offset += (input_section->output_section->vma
2607 + input_section->output_offset);
2608
2609 if (skip)
2610 memset (&outrel, 0, sizeof outrel);
2611 else if (h != NULL
2612 && h->dynindx != -1
2613 && (r_type == R_390_PC16
2614 || r_type == R_390_PC16DBL
2615 || r_type == R_390_PC32DBL
2616 || r_type == R_390_PC32
2617 || !info->shared
2618 || !info->symbolic
2619 || !h->def_regular))
2620 {
2621 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2622 outrel.r_addend = rel->r_addend;
2623 }
2624 else
2625 {
2626 /* This symbol is local, or marked to become local. */
2627 outrel.r_addend = relocation + rel->r_addend;
2628 if (r_type == R_390_32)
2629 {
2630 relocate = TRUE;
2631 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2632 }
2633 else
2634 {
2635 long sindx;
2636
2637 if (bfd_is_abs_section (sec))
2638 sindx = 0;
2639 else if (sec == NULL || sec->owner == NULL)
2640 {
2641 bfd_set_error(bfd_error_bad_value);
2642 return FALSE;
2643 }
2644 else
2645 {
2646 asection *osec;
2647
2648 osec = sec->output_section;
2649 sindx = elf_section_data (osec)->dynindx;
2650 BFD_ASSERT (sindx > 0);
2651
2652 /* We are turning this relocation into one
2653 against a section symbol, so subtract out
2654 the output section's address but not the
2655 offset of the input section in the output
2656 section. */
2657
2658 outrel.r_addend -= osec->vma;
2659 }
2660 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2661 }
2662 }
2663
2664 sreloc = elf_section_data (input_section)->sreloc;
2665 if (sreloc == NULL)
2666 abort ();
2667
2668 loc = sreloc->contents;
2669 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2670 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2671
2672 /* If this reloc is against an external symbol, we do
2673 not want to fiddle with the addend. Otherwise, we
2674 need to include the symbol value so that it becomes
2675 an addend for the dynamic reloc. */
2676 if (! relocate)
2677 continue;
2678 }
2679 break;
2680
2681 /* Relocations for tls literal pool entries. */
2682 case R_390_TLS_IE32:
2683 if (info->shared)
2684 {
2685 Elf_Internal_Rela outrel;
2686 asection *sreloc;
2687 bfd_byte *loc;
2688
2689 outrel.r_offset = rel->r_offset
2690 + input_section->output_section->vma
2691 + input_section->output_offset;
2692 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2693 sreloc = elf_section_data (input_section)->sreloc;
2694 if (sreloc == NULL)
2695 abort ();
2696 loc = sreloc->contents;
2697 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2698 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2699 }
2700 /* Fall through. */
2701
2702 case R_390_TLS_GD32:
2703 case R_390_TLS_GOTIE32:
2704 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2705 tls_type = GOT_UNKNOWN;
2706 if (h == NULL && local_got_offsets)
2707 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2708 else if (h != NULL)
2709 {
2710 tls_type = elf_s390_hash_entry(h)->tls_type;
2711 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2712 r_type = R_390_TLS_LE32;
2713 }
2714 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2715 r_type = R_390_TLS_IE32;
2716
2717 if (r_type == R_390_TLS_LE32)
2718 {
2719 /* This relocation gets optimized away by the local exec
2720 access optimization. */
2721 BFD_ASSERT (! unresolved_reloc);
2722 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2723 contents + rel->r_offset);
2724 continue;
2725 }
2726
2727 if (htab->sgot == NULL)
2728 abort ();
2729
2730 if (h != NULL)
2731 off = h->got.offset;
2732 else
2733 {
2734 if (local_got_offsets == NULL)
2735 abort ();
2736
2737 off = local_got_offsets[r_symndx];
2738 }
2739
2740 emit_tls_relocs:
2741
2742 if ((off & 1) != 0)
2743 off &= ~1;
2744 else
2745 {
2746 Elf_Internal_Rela outrel;
2747 bfd_byte *loc;
2748 int dr_type, indx;
2749
2750 if (htab->srelgot == NULL)
2751 abort ();
2752
2753 outrel.r_offset = (htab->sgot->output_section->vma
2754 + htab->sgot->output_offset + off);
2755
2756 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2757 if (r_type == R_390_TLS_GD32)
2758 dr_type = R_390_TLS_DTPMOD;
2759 else
2760 dr_type = R_390_TLS_TPOFF;
2761 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2762 outrel.r_addend = relocation - dtpoff_base (info);
2763 else
2764 outrel.r_addend = 0;
2765 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2766 loc = htab->srelgot->contents;
2767 loc += htab->srelgot->reloc_count++
2768 * sizeof (Elf32_External_Rela);
2769 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2770
2771 if (r_type == R_390_TLS_GD32)
2772 {
2773 if (indx == 0)
2774 {
2775 BFD_ASSERT (! unresolved_reloc);
2776 bfd_put_32 (output_bfd,
2777 relocation - dtpoff_base (info),
2778 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2779 }
2780 else
2781 {
2782 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2783 outrel.r_offset += GOT_ENTRY_SIZE;
2784 outrel.r_addend = 0;
2785 htab->srelgot->reloc_count++;
2786 loc += sizeof (Elf32_External_Rela);
2787 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2788 }
2789 }
2790
2791 if (h != NULL)
2792 h->got.offset |= 1;
2793 else
2794 local_got_offsets[r_symndx] |= 1;
2795 }
2796
2797 if (off >= (bfd_vma) -2)
2798 abort ();
2799 if (r_type == ELF32_R_TYPE (rel->r_info))
2800 {
2801 relocation = htab->sgot->output_offset + off;
2802 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2803 relocation += htab->sgot->output_section->vma;
2804 unresolved_reloc = FALSE;
2805 }
2806 else
2807 {
2808 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2809 contents + rel->r_offset);
2810 continue;
2811 }
2812 break;
2813
2814 case R_390_TLS_GOTIE12:
2815 case R_390_TLS_GOTIE20:
2816 case R_390_TLS_IEENT:
2817 if (h == NULL)
2818 {
2819 if (local_got_offsets == NULL)
2820 abort();
2821 off = local_got_offsets[r_symndx];
2822 if (info->shared)
2823 goto emit_tls_relocs;
2824 }
2825 else
2826 {
2827 off = h->got.offset;
2828 tls_type = elf_s390_hash_entry(h)->tls_type;
2829 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2830 goto emit_tls_relocs;
2831 }
2832
2833 if (htab->sgot == NULL)
2834 abort ();
2835
2836 BFD_ASSERT (! unresolved_reloc);
2837 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2838 htab->sgot->contents + off);
2839 relocation = htab->sgot->output_offset + off;
2840 if (r_type == R_390_TLS_IEENT)
2841 relocation += htab->sgot->output_section->vma;
2842 unresolved_reloc = FALSE;
2843 break;
2844
2845 case R_390_TLS_LDM32:
2846 if (! info->shared)
2847 /* The literal pool entry this relocation refers to gets ignored
2848 by the optimized code of the local exec model. Do nothing
2849 and the value will turn out zero. */
2850 continue;
2851
2852 if (htab->sgot == NULL)
2853 abort ();
2854
2855 off = htab->tls_ldm_got.offset;
2856 if (off & 1)
2857 off &= ~1;
2858 else
2859 {
2860 Elf_Internal_Rela outrel;
2861 bfd_byte *loc;
2862
2863 if (htab->srelgot == NULL)
2864 abort ();
2865
2866 outrel.r_offset = (htab->sgot->output_section->vma
2867 + htab->sgot->output_offset + off);
2868
2869 bfd_put_32 (output_bfd, 0,
2870 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2871 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2872 outrel.r_addend = 0;
2873 loc = htab->srelgot->contents;
2874 loc += htab->srelgot->reloc_count++
2875 * sizeof (Elf32_External_Rela);
2876 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2877 htab->tls_ldm_got.offset |= 1;
2878 }
2879 relocation = htab->sgot->output_offset + off;
2880 unresolved_reloc = FALSE;
2881 break;
2882
2883 case R_390_TLS_LE32:
2884 if (info->shared)
2885 {
2886 /* Linking a shared library with non-fpic code requires
2887 a R_390_TLS_TPOFF relocation. */
2888 Elf_Internal_Rela outrel;
2889 asection *sreloc;
2890 bfd_byte *loc;
2891 int indx;
2892
2893 outrel.r_offset = rel->r_offset
2894 + input_section->output_section->vma
2895 + input_section->output_offset;
2896 if (h != NULL && h->dynindx != -1)
2897 indx = h->dynindx;
2898 else
2899 indx = 0;
2900 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2901 if (indx == 0)
2902 outrel.r_addend = relocation - dtpoff_base (info);
2903 else
2904 outrel.r_addend = 0;
2905 sreloc = elf_section_data (input_section)->sreloc;
2906 if (sreloc == NULL)
2907 abort ();
2908 loc = sreloc->contents;
2909 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2910 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2911 }
2912 else
2913 {
2914 BFD_ASSERT (! unresolved_reloc);
2915 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2916 contents + rel->r_offset);
2917 }
2918 continue;
2919
2920 case R_390_TLS_LDO32:
2921 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2922 relocation -= dtpoff_base (info);
2923 else
2924 /* When converting LDO to LE, we must negate. */
2925 relocation = -tpoff (info, relocation);
2926 break;
2927
2928 /* Relocations for tls instructions. */
2929 case R_390_TLS_LOAD:
2930 case R_390_TLS_GDCALL:
2931 case R_390_TLS_LDCALL:
2932 tls_type = GOT_UNKNOWN;
2933 if (h == NULL && local_got_offsets)
2934 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2935 else if (h != NULL)
2936 tls_type = elf_s390_hash_entry(h)->tls_type;
2937
2938 if (tls_type == GOT_TLS_GD)
2939 continue;
2940
2941 if (r_type == R_390_TLS_LOAD)
2942 {
2943 if (!info->shared && (h == NULL || h->dynindx == -1))
2944 {
2945 /* IE->LE transition. Four valid cases:
2946 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2947 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2948 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2949 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2950 unsigned int insn, ry;
2951
2952 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2953 ry = 0;
2954 if ((insn & 0xff00f000) == 0x58000000)
2955 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2956 ry = (insn & 0x000f0000);
2957 else if ((insn & 0xff0f0000) == 0x58000000)
2958 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2959 ry = (insn & 0x0000f000) << 4;
2960 else if ((insn & 0xff00f000) == 0x5800c000)
2961 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2962 ry = (insn & 0x000f0000);
2963 else if ((insn & 0xff0f0000) == 0x580c0000)
2964 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2965 ry = (insn & 0x0000f000) << 4;
2966 else
2967 invalid_tls_insn (input_bfd, input_section, rel);
2968 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2969 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2970 }
2971 }
2972 else if (r_type == R_390_TLS_GDCALL)
2973 {
2974 unsigned int insn;
2975
2976 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2977 if ((insn & 0xff000fff) != 0x4d000000)
2978 invalid_tls_insn (input_bfd, input_section, rel);
2979 if (!info->shared && (h == NULL || h->dynindx == -1))
2980 /* GD->LE transition.
2981 bas %r14,0(%rx,%r13) -> bc 0,0 */
2982 insn = 0x47000000;
2983 else
2984 /* GD->IE transition.
2985 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2986 insn = 0x5822c000;
2987 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2988 }
2989 else if (r_type == R_390_TLS_LDCALL)
2990 {
2991 if (!info->shared)
2992 {
2993 unsigned int insn;
2994
2995 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2996 if ((insn & 0xff000fff) != 0x4d000000)
2997 invalid_tls_insn (input_bfd, input_section, rel);
2998 /* LD->LE transition.
2999 bas %r14,0(%rx,%r13) -> bc 0,0 */
3000 insn = 0x47000000;
3001 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3002 }
3003 }
3004 continue;
3005
3006 default:
3007 break;
3008 }
3009
3010 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3011 because such sections are not SEC_ALLOC and thus ld.so will
3012 not process them. */
3013 if (unresolved_reloc
3014 && !((input_section->flags & SEC_DEBUGGING) != 0
3015 && h->def_dynamic))
3016 (*_bfd_error_handler)
3017 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3018 input_bfd,
3019 input_section,
3020 (long) rel->r_offset,
3021 howto->name,
3022 h->root.root.string);
3023
3024 if (r_type == R_390_20
3025 || r_type == R_390_GOT20
3026 || r_type == R_390_GOTPLT20
3027 || r_type == R_390_TLS_GOTIE20)
3028 {
3029 relocation += rel->r_addend;
3030 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3031 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3032 contents, rel->r_offset,
3033 relocation, 0);
3034 }
3035 else
3036 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3037 contents, rel->r_offset,
3038 relocation, rel->r_addend);
3039
3040 if (r != bfd_reloc_ok)
3041 {
3042 const char *name;
3043
3044 if (h != NULL)
3045 name = h->root.root.string;
3046 else
3047 {
3048 name = bfd_elf_string_from_elf_section (input_bfd,
3049 symtab_hdr->sh_link,
3050 sym->st_name);
3051 if (name == NULL)
3052 return FALSE;
3053 if (*name == '\0')
3054 name = bfd_section_name (input_bfd, sec);
3055 }
3056
3057 if (r == bfd_reloc_overflow)
3058 {
3059
3060 if (! ((*info->callbacks->reloc_overflow)
3061 (info, (h ? &h->root : NULL), name, howto->name,
3062 (bfd_vma) 0, input_bfd, input_section,
3063 rel->r_offset)))
3064 return FALSE;
3065 }
3066 else
3067 {
3068 (*_bfd_error_handler)
3069 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3070 input_bfd, input_section,
3071 (long) rel->r_offset, name, (int) r);
3072 return FALSE;
3073 }
3074 }
3075 }
3076
3077 return TRUE;
3078 }
3079
3080 /* Finish up dynamic symbol handling. We set the contents of various
3081 dynamic sections here. */
3082
3083 static bfd_boolean
3084 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3085 bfd *output_bfd;
3086 struct bfd_link_info *info;
3087 struct elf_link_hash_entry *h;
3088 Elf_Internal_Sym *sym;
3089 {
3090 struct elf_s390_link_hash_table *htab;
3091
3092 htab = elf_s390_hash_table (info);
3093
3094 if (h->plt.offset != (bfd_vma) -1)
3095 {
3096 bfd_vma plt_index;
3097 bfd_vma got_offset;
3098 Elf_Internal_Rela rela;
3099 bfd_byte *loc;
3100 bfd_vma relative_offset;
3101
3102 /* This symbol has an entry in the procedure linkage table. Set
3103 it up. */
3104 if (h->dynindx == -1
3105 || htab->splt == NULL
3106 || htab->sgotplt == NULL
3107 || htab->srelplt == NULL)
3108 abort ();
3109
3110 /* Calc. index no.
3111 Current offset - size first entry / entry size. */
3112 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3113
3114 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3115 addr & GOT addr. */
3116 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3117
3118 /* S390 uses halfwords for relative branch calc! */
3119 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3120 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3121 /* If offset is > 32768, branch to a previous branch
3122 390 can only handle +-64 K jumps. */
3123 if ( -32768 > (int) relative_offset )
3124 relative_offset
3125 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3126
3127 /* Fill in the entry in the procedure linkage table. */
3128 if (!info->shared)
3129 {
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3131 htab->splt->contents + h->plt.offset);
3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3133 htab->splt->contents + h->plt.offset + 4);
3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3135 htab->splt->contents + h->plt.offset + 8);
3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3137 htab->splt->contents + h->plt.offset + 12);
3138 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3139 htab->splt->contents + h->plt.offset + 16);
3140 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3141 htab->splt->contents + h->plt.offset + 20);
3142 bfd_put_32 (output_bfd,
3143 (htab->sgotplt->output_section->vma
3144 + htab->sgotplt->output_offset
3145 + got_offset),
3146 htab->splt->contents + h->plt.offset + 24);
3147 }
3148 else if (got_offset < 4096)
3149 {
3150 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3151 htab->splt->contents + h->plt.offset);
3152 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3153 htab->splt->contents + h->plt.offset + 4);
3154 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3155 htab->splt->contents + h->plt.offset + 8);
3156 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3157 htab->splt->contents + h->plt.offset + 12);
3158 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3159 htab->splt->contents + h->plt.offset + 16);
3160 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3161 htab->splt->contents + h->plt.offset + 20);
3162 bfd_put_32 (output_bfd, (bfd_vma) 0,
3163 htab->splt->contents + h->plt.offset + 24);
3164 }
3165 else if (got_offset < 32768)
3166 {
3167 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3168 htab->splt->contents + h->plt.offset);
3169 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3170 htab->splt->contents + h->plt.offset + 4);
3171 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3172 htab->splt->contents + h->plt.offset + 8);
3173 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3174 htab->splt->contents + h->plt.offset + 12);
3175 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3176 htab->splt->contents + h->plt.offset + 16);
3177 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3178 htab->splt->contents + h->plt.offset + 20);
3179 bfd_put_32 (output_bfd, (bfd_vma) 0,
3180 htab->splt->contents + h->plt.offset + 24);
3181 }
3182 else
3183 {
3184 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3185 htab->splt->contents + h->plt.offset);
3186 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3187 htab->splt->contents + h->plt.offset + 4);
3188 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3189 htab->splt->contents + h->plt.offset + 8);
3190 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3191 htab->splt->contents + h->plt.offset + 12);
3192 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3193 htab->splt->contents + h->plt.offset + 16);
3194 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3195 htab->splt->contents + h->plt.offset + 20);
3196 bfd_put_32 (output_bfd, got_offset,
3197 htab->splt->contents + h->plt.offset + 24);
3198 }
3199 /* Insert offset into reloc. table here. */
3200 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3201 htab->splt->contents + h->plt.offset + 28);
3202
3203 /* Fill in the entry in the global offset table.
3204 Points to instruction after GOT offset. */
3205 bfd_put_32 (output_bfd,
3206 (htab->splt->output_section->vma
3207 + htab->splt->output_offset
3208 + h->plt.offset
3209 + 12),
3210 htab->sgotplt->contents + got_offset);
3211
3212 /* Fill in the entry in the .rela.plt section. */
3213 rela.r_offset = (htab->sgotplt->output_section->vma
3214 + htab->sgotplt->output_offset
3215 + got_offset);
3216 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3217 rela.r_addend = 0;
3218 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3219 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3220
3221 if (!h->def_regular)
3222 {
3223 /* Mark the symbol as undefined, rather than as defined in
3224 the .plt section. Leave the value alone. This is a clue
3225 for the dynamic linker, to make function pointer
3226 comparisons work between an application and shared
3227 library. */
3228 sym->st_shndx = SHN_UNDEF;
3229 }
3230 }
3231
3232 if (h->got.offset != (bfd_vma) -1
3233 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3234 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3235 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3236 {
3237 Elf_Internal_Rela rela;
3238 bfd_byte *loc;
3239
3240 /* This symbol has an entry in the global offset table. Set it
3241 up. */
3242
3243 if (htab->sgot == NULL || htab->srelgot == NULL)
3244 abort ();
3245
3246 rela.r_offset = (htab->sgot->output_section->vma
3247 + htab->sgot->output_offset
3248 + (h->got.offset &~ (bfd_vma) 1));
3249
3250 /* If this is a static link, or it is a -Bsymbolic link and the
3251 symbol is defined locally or was forced to be local because
3252 of a version file, we just want to emit a RELATIVE reloc.
3253 The entry in the global offset table will already have been
3254 initialized in the relocate_section function. */
3255 if (info->shared
3256 && (info->symbolic
3257 || h->dynindx == -1
3258 || h->forced_local)
3259 && h->def_regular)
3260 {
3261 BFD_ASSERT((h->got.offset & 1) != 0);
3262 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3263 rela.r_addend = (h->root.u.def.value
3264 + h->root.u.def.section->output_section->vma
3265 + h->root.u.def.section->output_offset);
3266 }
3267 else
3268 {
3269 BFD_ASSERT((h->got.offset & 1) == 0);
3270 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3271 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3272 rela.r_addend = 0;
3273 }
3274
3275 loc = htab->srelgot->contents;
3276 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3277 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3278 }
3279
3280 if (h->needs_copy)
3281 {
3282 Elf_Internal_Rela rela;
3283 bfd_byte *loc;
3284
3285 /* This symbols needs a copy reloc. Set it up. */
3286
3287 if (h->dynindx == -1
3288 || (h->root.type != bfd_link_hash_defined
3289 && h->root.type != bfd_link_hash_defweak)
3290 || htab->srelbss == NULL)
3291 abort ();
3292
3293 rela.r_offset = (h->root.u.def.value
3294 + h->root.u.def.section->output_section->vma
3295 + h->root.u.def.section->output_offset);
3296 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3297 rela.r_addend = 0;
3298 loc = htab->srelbss->contents;
3299 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3300 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3301 }
3302
3303 /* Mark some specially defined symbols as absolute. */
3304 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3305 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3306 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3307 sym->st_shndx = SHN_ABS;
3308
3309 return TRUE;
3310 }
3311
3312 /* Used to decide how to sort relocs in an optimal manner for the
3313 dynamic linker, before writing them out. */
3314
3315 static enum elf_reloc_type_class
3316 elf_s390_reloc_type_class (rela)
3317 const Elf_Internal_Rela *rela;
3318 {
3319 switch ((int) ELF32_R_TYPE (rela->r_info))
3320 {
3321 case R_390_RELATIVE:
3322 return reloc_class_relative;
3323 case R_390_JMP_SLOT:
3324 return reloc_class_plt;
3325 case R_390_COPY:
3326 return reloc_class_copy;
3327 default:
3328 return reloc_class_normal;
3329 }
3330 }
3331
3332 /* Finish up the dynamic sections. */
3333
3334 static bfd_boolean
3335 elf_s390_finish_dynamic_sections (output_bfd, info)
3336 bfd *output_bfd;
3337 struct bfd_link_info *info;
3338 {
3339 struct elf_s390_link_hash_table *htab;
3340 bfd *dynobj;
3341 asection *sdyn;
3342
3343 htab = elf_s390_hash_table (info);
3344 dynobj = htab->elf.dynobj;
3345 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3346
3347 if (htab->elf.dynamic_sections_created)
3348 {
3349 Elf32_External_Dyn *dyncon, *dynconend;
3350
3351 if (sdyn == NULL || htab->sgot == NULL)
3352 abort ();
3353
3354 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3355 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3356 for (; dyncon < dynconend; dyncon++)
3357 {
3358 Elf_Internal_Dyn dyn;
3359 asection *s;
3360
3361 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3362
3363 switch (dyn.d_tag)
3364 {
3365 default:
3366 continue;
3367
3368 case DT_PLTGOT:
3369 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3370 break;
3371
3372 case DT_JMPREL:
3373 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3374 break;
3375
3376 case DT_PLTRELSZ:
3377 s = htab->srelplt->output_section;
3378 dyn.d_un.d_val = s->size;
3379 break;
3380 }
3381
3382 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3383 }
3384
3385 /* Fill in the special first entry in the procedure linkage table. */
3386 if (htab->splt && htab->splt->size > 0)
3387 {
3388 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3389 if (info->shared)
3390 {
3391 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3392 htab->splt->contents );
3393 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3394 htab->splt->contents +4 );
3395 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3396 htab->splt->contents +8 );
3397 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3398 htab->splt->contents +12 );
3399 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3400 htab->splt->contents +16 );
3401 }
3402 else
3403 {
3404 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3405 htab->splt->contents );
3406 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3407 htab->splt->contents +4 );
3408 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3409 htab->splt->contents +8 );
3410 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3411 htab->splt->contents +12 );
3412 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3413 htab->splt->contents +16 );
3414 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3415 htab->splt->contents +20 );
3416 bfd_put_32 (output_bfd,
3417 htab->sgotplt->output_section->vma
3418 + htab->sgotplt->output_offset,
3419 htab->splt->contents + 24);
3420 }
3421 elf_section_data (htab->splt->output_section)
3422 ->this_hdr.sh_entsize = 4;
3423 }
3424
3425 }
3426
3427 if (htab->sgotplt)
3428 {
3429 /* Fill in the first three entries in the global offset table. */
3430 if (htab->sgotplt->size > 0)
3431 {
3432 bfd_put_32 (output_bfd,
3433 (sdyn == NULL ? (bfd_vma) 0
3434 : sdyn->output_section->vma + sdyn->output_offset),
3435 htab->sgotplt->contents);
3436 /* One entry for shared object struct ptr. */
3437 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3438 /* One entry for _dl_runtime_resolve. */
3439 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3440 }
3441
3442 elf_section_data (htab->sgotplt->output_section)
3443 ->this_hdr.sh_entsize = 4;
3444 }
3445 return TRUE;
3446 }
3447
3448 static bfd_boolean
3449 elf_s390_grok_prstatus (abfd, note)
3450 bfd * abfd;
3451 Elf_Internal_Note * note;
3452 {
3453 int offset;
3454 unsigned int size;
3455
3456 switch (note->descsz)
3457 {
3458 default:
3459 return FALSE;
3460
3461 case 224: /* S/390 Linux. */
3462 /* pr_cursig */
3463 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3464
3465 /* pr_pid */
3466 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3467
3468 /* pr_reg */
3469 offset = 72;
3470 size = 144;
3471 break;
3472 }
3473
3474 /* Make a ".reg/999" section. */
3475 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3476 size, note->descpos + offset);
3477 }
3478
3479 /* Return address for Ith PLT stub in section PLT, for relocation REL
3480 or (bfd_vma) -1 if it should not be included. */
3481
3482 static bfd_vma
3483 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3484 const arelent *rel ATTRIBUTE_UNUSED)
3485 {
3486 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3487 }
3488
3489
3490 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3491 #define TARGET_BIG_NAME "elf32-s390"
3492 #define ELF_ARCH bfd_arch_s390
3493 #define ELF_MACHINE_CODE EM_S390
3494 #define ELF_MACHINE_ALT1 EM_S390_OLD
3495 #define ELF_MAXPAGESIZE 0x1000
3496
3497 #define elf_backend_can_gc_sections 1
3498 #define elf_backend_can_refcount 1
3499 #define elf_backend_want_got_plt 1
3500 #define elf_backend_plt_readonly 1
3501 #define elf_backend_want_plt_sym 0
3502 #define elf_backend_got_header_size 12
3503 #define elf_backend_rela_normal 1
3504
3505 #define elf_info_to_howto elf_s390_info_to_howto
3506
3507 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3508 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3509 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3510
3511 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3512 #define elf_backend_check_relocs elf_s390_check_relocs
3513 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3514 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3515 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3516 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3517 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3518 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3519 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3520 #define elf_backend_relocate_section elf_s390_relocate_section
3521 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3522 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3523 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3524 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3525
3526 #define bfd_elf32_mkobject elf_s390_mkobject
3527 #define elf_backend_object_p elf_s390_object_p
3528
3529 #include "elf32-target.h"
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