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bfd/
[binutils.git] / bfd / elf32-s390.c
blob55090c6a0c0d4310337f6e94568867a04015268a
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 void *vpp;
1323
1324 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1325 sec, r_symndx);
1326 if (s == NULL)
1327 return FALSE;
1328
1329 vpp = &elf_section_data (s)->local_dynrel;
1330 head = (struct elf_s390_dyn_relocs **) vpp;
1331 }
1332
1333 p = *head;
1334 if (p == NULL || p->sec != sec)
1335 {
1336 bfd_size_type amt = sizeof *p;
1337
1338 p = ((struct elf_s390_dyn_relocs *)
1339 bfd_alloc (htab->elf.dynobj, amt));
1340 if (p == NULL)
1341 return FALSE;
1342 p->next = *head;
1343 *head = p;
1344 p->sec = sec;
1345 p->count = 0;
1346 p->pc_count = 0;
1347 }
1348
1349 p->count += 1;
1350 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1353 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1354 p->pc_count += 1;
1355 }
1356 break;
1357
1358 /* This relocation describes the C++ object vtable hierarchy.
1359 Reconstruct it for later use during GC. */
1360 case R_390_GNU_VTINHERIT:
1361 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1362 return FALSE;
1363 break;
1364
1365 /* This relocation describes which C++ vtable entries are actually
1366 used. Record for later use during GC. */
1367 case R_390_GNU_VTENTRY:
1368 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1369 return FALSE;
1370 break;
1371
1372 default:
1373 break;
1374 }
1375 }
1376
1377 return TRUE;
1378 }
1379
1380 /* Return the section that should be marked against GC for a given
1381 relocation. */
1382
1383 static asection *
1384 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1385 asection *sec;
1386 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1387 Elf_Internal_Rela *rel;
1388 struct elf_link_hash_entry *h;
1389 Elf_Internal_Sym *sym;
1390 {
1391 if (h != NULL)
1392 {
1393 switch (ELF32_R_TYPE (rel->r_info))
1394 {
1395 case R_390_GNU_VTINHERIT:
1396 case R_390_GNU_VTENTRY:
1397 break;
1398
1399 default:
1400 switch (h->root.type)
1401 {
1402 case bfd_link_hash_defined:
1403 case bfd_link_hash_defweak:
1404 return h->root.u.def.section;
1405
1406 case bfd_link_hash_common:
1407 return h->root.u.c.p->section;
1408
1409 default:
1410 break;
1411 }
1412 }
1413 }
1414 else
1415 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1416
1417 return NULL;
1418 }
1419
1420 /* Update the got entry reference counts for the section being removed. */
1421
1422 static bfd_boolean
1423 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1424 bfd *abfd;
1425 struct bfd_link_info *info;
1426 asection *sec;
1427 const Elf_Internal_Rela *relocs;
1428 {
1429 Elf_Internal_Shdr *symtab_hdr;
1430 struct elf_link_hash_entry **sym_hashes;
1431 bfd_signed_vma *local_got_refcounts;
1432 const Elf_Internal_Rela *rel, *relend;
1433
1434 elf_section_data (sec)->local_dynrel = NULL;
1435
1436 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1437 sym_hashes = elf_sym_hashes (abfd);
1438 local_got_refcounts = elf_local_got_refcounts (abfd);
1439
1440 relend = relocs + sec->reloc_count;
1441 for (rel = relocs; rel < relend; rel++)
1442 {
1443 unsigned long r_symndx;
1444 unsigned int r_type;
1445 struct elf_link_hash_entry *h = NULL;
1446
1447 r_symndx = ELF32_R_SYM (rel->r_info);
1448 if (r_symndx >= symtab_hdr->sh_info)
1449 {
1450 struct elf_s390_link_hash_entry *eh;
1451 struct elf_s390_dyn_relocs **pp;
1452 struct elf_s390_dyn_relocs *p;
1453
1454 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1455 while (h->root.type == bfd_link_hash_indirect
1456 || h->root.type == bfd_link_hash_warning)
1457 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1458 eh = (struct elf_s390_link_hash_entry *) h;
1459
1460 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1461 if (p->sec == sec)
1462 {
1463 /* Everything must go for SEC. */
1464 *pp = p->next;
1465 break;
1466 }
1467 }
1468
1469 r_type = ELF32_R_TYPE (rel->r_info);
1470 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1471 switch (r_type)
1472 {
1473 case R_390_TLS_LDM32:
1474 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1475 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1476 break;
1477
1478 case R_390_TLS_GD32:
1479 case R_390_TLS_IE32:
1480 case R_390_TLS_GOTIE12:
1481 case R_390_TLS_GOTIE20:
1482 case R_390_TLS_GOTIE32:
1483 case R_390_TLS_IEENT:
1484 case R_390_GOT12:
1485 case R_390_GOT16:
1486 case R_390_GOT20:
1487 case R_390_GOT32:
1488 case R_390_GOTOFF16:
1489 case R_390_GOTOFF32:
1490 case R_390_GOTPC:
1491 case R_390_GOTPCDBL:
1492 case R_390_GOTENT:
1493 if (h != NULL)
1494 {
1495 if (h->got.refcount > 0)
1496 h->got.refcount -= 1;
1497 }
1498 else if (local_got_refcounts != NULL)
1499 {
1500 if (local_got_refcounts[r_symndx] > 0)
1501 local_got_refcounts[r_symndx] -= 1;
1502 }
1503 break;
1504
1505 case R_390_8:
1506 case R_390_12:
1507 case R_390_16:
1508 case R_390_20:
1509 case R_390_32:
1510 case R_390_PC16:
1511 case R_390_PC16DBL:
1512 case R_390_PC32DBL:
1513 case R_390_PC32:
1514 if (info->shared)
1515 break;
1516 /* Fall through. */
1517
1518 case R_390_PLT16DBL:
1519 case R_390_PLT32DBL:
1520 case R_390_PLT32:
1521 case R_390_PLTOFF16:
1522 case R_390_PLTOFF32:
1523 if (h != NULL)
1524 {
1525 if (h->plt.refcount > 0)
1526 h->plt.refcount -= 1;
1527 }
1528 break;
1529
1530 case R_390_GOTPLT12:
1531 case R_390_GOTPLT16:
1532 case R_390_GOTPLT20:
1533 case R_390_GOTPLT32:
1534 case R_390_GOTPLTENT:
1535 if (h != NULL)
1536 {
1537 if (h->plt.refcount > 0)
1538 {
1539 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1540 h->plt.refcount -= 1;
1541 }
1542 }
1543 else if (local_got_refcounts != NULL)
1544 {
1545 if (local_got_refcounts[r_symndx] > 0)
1546 local_got_refcounts[r_symndx] -= 1;
1547 }
1548 break;
1549
1550 default:
1551 break;
1552 }
1553 }
1554
1555 return TRUE;
1556 }
1557
1558 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1559 entry but we found we will not create any. Called when we find we will
1560 not have any PLT for this symbol, by for example
1561 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1562 or elf_s390_size_dynamic_sections if no dynamic sections will be
1563 created (we're only linking static objects). */
1564
1565 static void
1566 elf_s390_adjust_gotplt (h)
1567 struct elf_s390_link_hash_entry *h;
1568 {
1569 if (h->elf.root.type == bfd_link_hash_warning)
1570 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1571
1572 if (h->gotplt_refcount <= 0)
1573 return;
1574
1575 /* We simply add the number of gotplt references to the number
1576 * of got references for this symbol. */
1577 h->elf.got.refcount += h->gotplt_refcount;
1578 h->gotplt_refcount = -1;
1579 }
1580
1581 /* Adjust a symbol defined by a dynamic object and referenced by a
1582 regular object. The current definition is in some section of the
1583 dynamic object, but we're not including those sections. We have to
1584 change the definition to something the rest of the link can
1585 understand. */
1586
1587 static bfd_boolean
1588 elf_s390_adjust_dynamic_symbol (info, h)
1589 struct bfd_link_info *info;
1590 struct elf_link_hash_entry *h;
1591 {
1592 struct elf_s390_link_hash_table *htab;
1593 asection *s;
1594 unsigned int power_of_two;
1595
1596 /* If this is a function, put it in the procedure linkage table. We
1597 will fill in the contents of the procedure linkage table later
1598 (although we could actually do it here). */
1599 if (h->type == STT_FUNC
1600 || h->needs_plt)
1601 {
1602 if (h->plt.refcount <= 0
1603 || (! info->shared
1604 && !h->def_dynamic
1605 && !h->ref_dynamic
1606 && h->root.type != bfd_link_hash_undefweak
1607 && h->root.type != bfd_link_hash_undefined))
1608 {
1609 /* This case can occur if we saw a PLT32 reloc in an input
1610 file, but the symbol was never referred to by a dynamic
1611 object, or if all references were garbage collected. In
1612 such a case, we don't actually need to build a procedure
1613 linkage table, and we can just do a PC32 reloc instead. */
1614 h->plt.offset = (bfd_vma) -1;
1615 h->needs_plt = 0;
1616 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1617 }
1618
1619 return TRUE;
1620 }
1621 else
1622 /* It's possible that we incorrectly decided a .plt reloc was
1623 needed for an R_390_PC32 reloc to a non-function sym in
1624 check_relocs. We can't decide accurately between function and
1625 non-function syms in check-relocs; Objects loaded later in
1626 the link may change h->type. So fix it now. */
1627 h->plt.offset = (bfd_vma) -1;
1628
1629 /* If this is a weak symbol, and there is a real definition, the
1630 processor independent code will have arranged for us to see the
1631 real definition first, and we can just use the same value. */
1632 if (h->u.weakdef != NULL)
1633 {
1634 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1635 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1636 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1637 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1638 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1639 h->non_got_ref = h->u.weakdef->non_got_ref;
1640 return TRUE;
1641 }
1642
1643 /* This is a reference to a symbol defined by a dynamic object which
1644 is not a function. */
1645
1646 /* If we are creating a shared library, we must presume that the
1647 only references to the symbol are via the global offset table.
1648 For such cases we need not do anything here; the relocations will
1649 be handled correctly by relocate_section. */
1650 if (info->shared)
1651 return TRUE;
1652
1653 /* If there are no references to this symbol that do not use the
1654 GOT, we don't need to generate a copy reloc. */
1655 if (!h->non_got_ref)
1656 return TRUE;
1657
1658 /* If -z nocopyreloc was given, we won't generate them either. */
1659 if (info->nocopyreloc)
1660 {
1661 h->non_got_ref = 0;
1662 return TRUE;
1663 }
1664
1665 if (ELIMINATE_COPY_RELOCS)
1666 {
1667 struct elf_s390_link_hash_entry * eh;
1668 struct elf_s390_dyn_relocs *p;
1669
1670 eh = (struct elf_s390_link_hash_entry *) h;
1671 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1672 {
1673 s = p->sec->output_section;
1674 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1675 break;
1676 }
1677
1678 /* If we didn't find any dynamic relocs in read-only sections, then
1679 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1680 if (p == NULL)
1681 {
1682 h->non_got_ref = 0;
1683 return TRUE;
1684 }
1685 }
1686
1687 if (h->size == 0)
1688 {
1689 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1690 h->root.root.string);
1691 return TRUE;
1692 }
1693
1694 /* We must allocate the symbol in our .dynbss section, which will
1695 become part of the .bss section of the executable. There will be
1696 an entry for this symbol in the .dynsym section. The dynamic
1697 object will contain position independent code, so all references
1698 from the dynamic object to this symbol will go through the global
1699 offset table. The dynamic linker will use the .dynsym entry to
1700 determine the address it must put in the global offset table, so
1701 both the dynamic object and the regular object will refer to the
1702 same memory location for the variable. */
1703
1704 htab = elf_s390_hash_table (info);
1705
1706 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1707 copy the initial value out of the dynamic object and into the
1708 runtime process image. */
1709 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1710 {
1711 htab->srelbss->size += sizeof (Elf32_External_Rela);
1712 h->needs_copy = 1;
1713 }
1714
1715 /* We need to figure out the alignment required for this symbol. I
1716 have no idea how ELF linkers handle this. */
1717 power_of_two = bfd_log2 (h->size);
1718 if (power_of_two > 3)
1719 power_of_two = 3;
1720
1721 /* Apply the required alignment. */
1722 s = htab->sdynbss;
1723 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1724 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1725 {
1726 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1727 return FALSE;
1728 }
1729
1730 /* Define the symbol as being at this point in the section. */
1731 h->root.u.def.section = s;
1732 h->root.u.def.value = s->size;
1733
1734 /* Increment the section size to make room for the symbol. */
1735 s->size += h->size;
1736
1737 return TRUE;
1738 }
1739
1740 /* Allocate space in .plt, .got and associated reloc sections for
1741 dynamic relocs. */
1742
1743 static bfd_boolean
1744 allocate_dynrelocs (h, inf)
1745 struct elf_link_hash_entry *h;
1746 PTR inf;
1747 {
1748 struct bfd_link_info *info;
1749 struct elf_s390_link_hash_table *htab;
1750 struct elf_s390_link_hash_entry *eh;
1751 struct elf_s390_dyn_relocs *p;
1752
1753 if (h->root.type == bfd_link_hash_indirect)
1754 return TRUE;
1755
1756 if (h->root.type == bfd_link_hash_warning)
1757 /* When warning symbols are created, they **replace** the "real"
1758 entry in the hash table, thus we never get to see the real
1759 symbol in a hash traversal. So look at it now. */
1760 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1761
1762 info = (struct bfd_link_info *) inf;
1763 htab = elf_s390_hash_table (info);
1764
1765 if (htab->elf.dynamic_sections_created
1766 && h->plt.refcount > 0
1767 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1768 || h->root.type != bfd_link_hash_undefweak))
1769 {
1770 /* Make sure this symbol is output as a dynamic symbol.
1771 Undefined weak syms won't yet be marked as dynamic. */
1772 if (h->dynindx == -1
1773 && !h->forced_local)
1774 {
1775 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1776 return FALSE;
1777 }
1778
1779 if (info->shared
1780 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1781 {
1782 asection *s = htab->splt;
1783
1784 /* If this is the first .plt entry, make room for the special
1785 first entry. */
1786 if (s->size == 0)
1787 s->size += PLT_FIRST_ENTRY_SIZE;
1788
1789 h->plt.offset = s->size;
1790
1791 /* If this symbol is not defined in a regular file, and we are
1792 not generating a shared library, then set the symbol to this
1793 location in the .plt. This is required to make function
1794 pointers compare as equal between the normal executable and
1795 the shared library. */
1796 if (! info->shared
1797 && !h->def_regular)
1798 {
1799 h->root.u.def.section = s;
1800 h->root.u.def.value = h->plt.offset;
1801 }
1802
1803 /* Make room for this entry. */
1804 s->size += PLT_ENTRY_SIZE;
1805
1806 /* We also need to make an entry in the .got.plt section, which
1807 will be placed in the .got section by the linker script. */
1808 htab->sgotplt->size += GOT_ENTRY_SIZE;
1809
1810 /* We also need to make an entry in the .rela.plt section. */
1811 htab->srelplt->size += sizeof (Elf32_External_Rela);
1812 }
1813 else
1814 {
1815 h->plt.offset = (bfd_vma) -1;
1816 h->needs_plt = 0;
1817 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1818 }
1819 }
1820 else
1821 {
1822 h->plt.offset = (bfd_vma) -1;
1823 h->needs_plt = 0;
1824 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1825 }
1826
1827 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1828 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1829 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1830 we can save the dynamic TLS relocation. */
1831 if (h->got.refcount > 0
1832 && !info->shared
1833 && h->dynindx == -1
1834 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1835 {
1836 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1837 /* For the GOTIE access without a literal pool entry the offset has
1838 to be stored somewhere. The immediate value in the instruction
1839 is not bit enough so the value is stored in the got. */
1840 {
1841 h->got.offset = htab->sgot->size;
1842 htab->sgot->size += GOT_ENTRY_SIZE;
1843 }
1844 else
1845 h->got.offset = (bfd_vma) -1;
1846 }
1847 else if (h->got.refcount > 0)
1848 {
1849 asection *s;
1850 bfd_boolean dyn;
1851 int tls_type = elf_s390_hash_entry(h)->tls_type;
1852
1853 /* Make sure this symbol is output as a dynamic symbol.
1854 Undefined weak syms won't yet be marked as dynamic. */
1855 if (h->dynindx == -1
1856 && !h->forced_local)
1857 {
1858 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1859 return FALSE;
1860 }
1861
1862 s = htab->sgot;
1863 h->got.offset = s->size;
1864 s->size += GOT_ENTRY_SIZE;
1865 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1866 if (tls_type == GOT_TLS_GD)
1867 s->size += GOT_ENTRY_SIZE;
1868 dyn = htab->elf.dynamic_sections_created;
1869 /* R_390_TLS_IE32 needs one dynamic relocation,
1870 R_390_TLS_GD32 needs one if local symbol and two if global. */
1871 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1872 || tls_type >= GOT_TLS_IE)
1873 htab->srelgot->size += sizeof (Elf32_External_Rela);
1874 else if (tls_type == GOT_TLS_GD)
1875 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1876 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1877 || h->root.type != bfd_link_hash_undefweak)
1878 && (info->shared
1879 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1880 htab->srelgot->size += sizeof (Elf32_External_Rela);
1881 }
1882 else
1883 h->got.offset = (bfd_vma) -1;
1884
1885 eh = (struct elf_s390_link_hash_entry *) h;
1886 if (eh->dyn_relocs == NULL)
1887 return TRUE;
1888
1889 /* In the shared -Bsymbolic case, discard space allocated for
1890 dynamic pc-relative relocs against symbols which turn out to be
1891 defined in regular objects. For the normal shared case, discard
1892 space for pc-relative relocs that have become local due to symbol
1893 visibility changes. */
1894
1895 if (info->shared)
1896 {
1897 if (SYMBOL_REFERENCES_LOCAL (info, h))
1898 {
1899 struct elf_s390_dyn_relocs **pp;
1900
1901 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1902 {
1903 p->count -= p->pc_count;
1904 p->pc_count = 0;
1905 if (p->count == 0)
1906 *pp = p->next;
1907 else
1908 pp = &p->next;
1909 }
1910 }
1911
1912 /* Also discard relocs on undefined weak syms with non-default
1913 visibility. */
1914 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1915 && h->root.type == bfd_link_hash_undefweak)
1916 eh->dyn_relocs = NULL;
1917 }
1918 else if (ELIMINATE_COPY_RELOCS)
1919 {
1920 /* For the non-shared case, discard space for relocs against
1921 symbols which turn out to need copy relocs or are not
1922 dynamic. */
1923
1924 if (!h->non_got_ref
1925 && ((h->def_dynamic
1926 && !h->def_regular)
1927 || (htab->elf.dynamic_sections_created
1928 && (h->root.type == bfd_link_hash_undefweak
1929 || h->root.type == bfd_link_hash_undefined))))
1930 {
1931 /* Make sure this symbol is output as a dynamic symbol.
1932 Undefined weak syms won't yet be marked as dynamic. */
1933 if (h->dynindx == -1
1934 && !h->forced_local)
1935 {
1936 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1937 return FALSE;
1938 }
1939
1940 /* If that succeeded, we know we'll be keeping all the
1941 relocs. */
1942 if (h->dynindx != -1)
1943 goto keep;
1944 }
1945
1946 eh->dyn_relocs = NULL;
1947
1948 keep: ;
1949 }
1950
1951 /* Finally, allocate space. */
1952 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1953 {
1954 asection *sreloc = elf_section_data (p->sec)->sreloc;
1955
1956 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1957 }
1958
1959 return TRUE;
1960 }
1961
1962 /* Find any dynamic relocs that apply to read-only sections. */
1963
1964 static bfd_boolean
1965 readonly_dynrelocs (h, inf)
1966 struct elf_link_hash_entry *h;
1967 PTR inf;
1968 {
1969 struct elf_s390_link_hash_entry *eh;
1970 struct elf_s390_dyn_relocs *p;
1971
1972 if (h->root.type == bfd_link_hash_warning)
1973 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1974
1975 eh = (struct elf_s390_link_hash_entry *) h;
1976 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1977 {
1978 asection *s = p->sec->output_section;
1979
1980 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1981 {
1982 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1983
1984 info->flags |= DF_TEXTREL;
1985
1986 /* Not an error, just cut short the traversal. */
1987 return FALSE;
1988 }
1989 }
1990 return TRUE;
1991 }
1992
1993 /* Set the sizes of the dynamic sections. */
1994
1995 static bfd_boolean
1996 elf_s390_size_dynamic_sections (output_bfd, info)
1997 bfd *output_bfd ATTRIBUTE_UNUSED;
1998 struct bfd_link_info *info;
1999 {
2000 struct elf_s390_link_hash_table *htab;
2001 bfd *dynobj;
2002 asection *s;
2003 bfd_boolean relocs;
2004 bfd *ibfd;
2005
2006 htab = elf_s390_hash_table (info);
2007 dynobj = htab->elf.dynobj;
2008 if (dynobj == NULL)
2009 abort ();
2010
2011 if (htab->elf.dynamic_sections_created)
2012 {
2013 /* Set the contents of the .interp section to the interpreter. */
2014 if (info->executable)
2015 {
2016 s = bfd_get_section_by_name (dynobj, ".interp");
2017 if (s == NULL)
2018 abort ();
2019 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2020 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2021 }
2022 }
2023
2024 /* Set up .got offsets for local syms, and space for local dynamic
2025 relocs. */
2026 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2027 {
2028 bfd_signed_vma *local_got;
2029 bfd_signed_vma *end_local_got;
2030 char *local_tls_type;
2031 bfd_size_type locsymcount;
2032 Elf_Internal_Shdr *symtab_hdr;
2033 asection *srela;
2034
2035 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2036 continue;
2037
2038 for (s = ibfd->sections; s != NULL; s = s->next)
2039 {
2040 struct elf_s390_dyn_relocs *p;
2041
2042 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2043 {
2044 if (!bfd_is_abs_section (p->sec)
2045 && bfd_is_abs_section (p->sec->output_section))
2046 {
2047 /* Input section has been discarded, either because
2048 it is a copy of a linkonce section or due to
2049 linker script /DISCARD/, so we'll be discarding
2050 the relocs too. */
2051 }
2052 else if (p->count != 0)
2053 {
2054 srela = elf_section_data (p->sec)->sreloc;
2055 srela->size += p->count * sizeof (Elf32_External_Rela);
2056 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2057 info->flags |= DF_TEXTREL;
2058 }
2059 }
2060 }
2061
2062 local_got = elf_local_got_refcounts (ibfd);
2063 if (!local_got)
2064 continue;
2065
2066 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2067 locsymcount = symtab_hdr->sh_info;
2068 end_local_got = local_got + locsymcount;
2069 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2070 s = htab->sgot;
2071 srela = htab->srelgot;
2072 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2073 {
2074 if (*local_got > 0)
2075 {
2076 *local_got = s->size;
2077 s->size += GOT_ENTRY_SIZE;
2078 if (*local_tls_type == GOT_TLS_GD)
2079 s->size += GOT_ENTRY_SIZE;
2080 if (info->shared)
2081 srela->size += sizeof (Elf32_External_Rela);
2082 }
2083 else
2084 *local_got = (bfd_vma) -1;
2085 }
2086 }
2087
2088 if (htab->tls_ldm_got.refcount > 0)
2089 {
2090 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2091 relocs. */
2092 htab->tls_ldm_got.offset = htab->sgot->size;
2093 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2094 htab->srelgot->size += sizeof (Elf32_External_Rela);
2095 }
2096 else
2097 htab->tls_ldm_got.offset = -1;
2098
2099 /* Allocate global sym .plt and .got entries, and space for global
2100 sym dynamic relocs. */
2101 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2102
2103 /* We now have determined the sizes of the various dynamic sections.
2104 Allocate memory for them. */
2105 relocs = FALSE;
2106 for (s = dynobj->sections; s != NULL; s = s->next)
2107 {
2108 if ((s->flags & SEC_LINKER_CREATED) == 0)
2109 continue;
2110
2111 if (s == htab->splt
2112 || s == htab->sgot
2113 || s == htab->sgotplt
2114 || s == htab->sdynbss)
2115 {
2116 /* Strip this section if we don't need it; see the
2117 comment below. */
2118 }
2119 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2120 {
2121 if (s->size != 0)
2122 relocs = TRUE;
2123
2124 /* We use the reloc_count field as a counter if we need
2125 to copy relocs into the output file. */
2126 s->reloc_count = 0;
2127 }
2128 else
2129 {
2130 /* It's not one of our sections, so don't allocate space. */
2131 continue;
2132 }
2133
2134 if (s->size == 0)
2135 {
2136 /* If we don't need this section, strip it from the
2137 output file. This is to handle .rela.bss and
2138 .rela.plt. We must create it in
2139 create_dynamic_sections, because it must be created
2140 before the linker maps input sections to output
2141 sections. The linker does that before
2142 adjust_dynamic_symbol is called, and it is that
2143 function which decides whether anything needs to go
2144 into these sections. */
2145
2146 s->flags |= SEC_EXCLUDE;
2147 continue;
2148 }
2149
2150 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2151 continue;
2152
2153 /* Allocate memory for the section contents. We use bfd_zalloc
2154 here in case unused entries are not reclaimed before the
2155 section's contents are written out. This should not happen,
2156 but this way if it does, we get a R_390_NONE reloc instead
2157 of garbage. */
2158 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2159 if (s->contents == NULL)
2160 return FALSE;
2161 }
2162
2163 if (htab->elf.dynamic_sections_created)
2164 {
2165 /* Add some entries to the .dynamic section. We fill in the
2166 values later, in elf_s390_finish_dynamic_sections, but we
2167 must add the entries now so that we get the correct size for
2168 the .dynamic section. The DT_DEBUG entry is filled in by the
2169 dynamic linker and used by the debugger. */
2170 #define add_dynamic_entry(TAG, VAL) \
2171 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2172
2173 if (info->executable)
2174 {
2175 if (!add_dynamic_entry (DT_DEBUG, 0))
2176 return FALSE;
2177 }
2178
2179 if (htab->splt->size != 0)
2180 {
2181 if (!add_dynamic_entry (DT_PLTGOT, 0)
2182 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2183 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2184 || !add_dynamic_entry (DT_JMPREL, 0))
2185 return FALSE;
2186 }
2187
2188 if (relocs)
2189 {
2190 if (!add_dynamic_entry (DT_RELA, 0)
2191 || !add_dynamic_entry (DT_RELASZ, 0)
2192 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2193 return FALSE;
2194
2195 /* If any dynamic relocs apply to a read-only section,
2196 then we need a DT_TEXTREL entry. */
2197 if ((info->flags & DF_TEXTREL) == 0)
2198 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2199 (PTR) info);
2200
2201 if ((info->flags & DF_TEXTREL) != 0)
2202 {
2203 if (!add_dynamic_entry (DT_TEXTREL, 0))
2204 return FALSE;
2205 }
2206 }
2207 }
2208 #undef add_dynamic_entry
2209
2210 return TRUE;
2211 }
2212
2213 /* Return the base VMA address which should be subtracted from real addresses
2214 when resolving @dtpoff relocation.
2215 This is PT_TLS segment p_vaddr. */
2216
2217 static bfd_vma
2218 dtpoff_base (info)
2219 struct bfd_link_info *info;
2220 {
2221 /* If tls_sec is NULL, we should have signalled an error already. */
2222 if (elf_hash_table (info)->tls_sec == NULL)
2223 return 0;
2224 return elf_hash_table (info)->tls_sec->vma;
2225 }
2226
2227 /* Return the relocation value for @tpoff relocation
2228 if STT_TLS virtual address is ADDRESS. */
2229
2230 static bfd_vma
2231 tpoff (info, address)
2232 struct bfd_link_info *info;
2233 bfd_vma address;
2234 {
2235 struct elf_link_hash_table *htab = elf_hash_table (info);
2236
2237 /* If tls_sec is NULL, we should have signalled an error already. */
2238 if (htab->tls_sec == NULL)
2239 return 0;
2240 return htab->tls_size + htab->tls_sec->vma - address;
2241 }
2242
2243 /* Complain if TLS instruction relocation is against an invalid
2244 instruction. */
2245
2246 static void
2247 invalid_tls_insn (input_bfd, input_section, rel)
2248 bfd *input_bfd;
2249 asection *input_section;
2250 Elf_Internal_Rela *rel;
2251 {
2252 reloc_howto_type *howto;
2253
2254 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2255 (*_bfd_error_handler)
2256 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2257 input_bfd,
2258 input_section,
2259 (long) rel->r_offset,
2260 howto->name);
2261 }
2262
2263 /* Relocate a 390 ELF section. */
2264
2265 static bfd_boolean
2266 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2267 contents, relocs, local_syms, local_sections)
2268 bfd *output_bfd;
2269 struct bfd_link_info *info;
2270 bfd *input_bfd;
2271 asection *input_section;
2272 bfd_byte *contents;
2273 Elf_Internal_Rela *relocs;
2274 Elf_Internal_Sym *local_syms;
2275 asection **local_sections;
2276 {
2277 struct elf_s390_link_hash_table *htab;
2278 Elf_Internal_Shdr *symtab_hdr;
2279 struct elf_link_hash_entry **sym_hashes;
2280 bfd_vma *local_got_offsets;
2281 Elf_Internal_Rela *rel;
2282 Elf_Internal_Rela *relend;
2283
2284 if (info->relocatable)
2285 return TRUE;
2286
2287 htab = elf_s390_hash_table (info);
2288 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2289 sym_hashes = elf_sym_hashes (input_bfd);
2290 local_got_offsets = elf_local_got_offsets (input_bfd);
2291
2292 rel = relocs;
2293 relend = relocs + input_section->reloc_count;
2294 for (; rel < relend; rel++)
2295 {
2296 unsigned int r_type;
2297 reloc_howto_type *howto;
2298 unsigned long r_symndx;
2299 struct elf_link_hash_entry *h;
2300 Elf_Internal_Sym *sym;
2301 asection *sec;
2302 bfd_vma off;
2303 bfd_vma relocation;
2304 bfd_boolean unresolved_reloc;
2305 bfd_reloc_status_type r;
2306 int tls_type;
2307
2308 r_type = ELF32_R_TYPE (rel->r_info);
2309 if (r_type == (int) R_390_GNU_VTINHERIT
2310 || r_type == (int) R_390_GNU_VTENTRY)
2311 continue;
2312 if (r_type >= (int) R_390_max)
2313 {
2314 bfd_set_error (bfd_error_bad_value);
2315 return FALSE;
2316 }
2317
2318 howto = elf_howto_table + r_type;
2319 r_symndx = ELF32_R_SYM (rel->r_info);
2320
2321 /* This is a final link. */
2322 h = NULL;
2323 sym = NULL;
2324 sec = NULL;
2325 unresolved_reloc = FALSE;
2326 if (r_symndx < symtab_hdr->sh_info)
2327 {
2328 sym = local_syms + r_symndx;
2329 sec = local_sections[r_symndx];
2330 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2331 }
2332 else
2333 {
2334 bfd_boolean warned ATTRIBUTE_UNUSED;
2335
2336 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2337 r_symndx, symtab_hdr, sym_hashes,
2338 h, sec, relocation,
2339 unresolved_reloc, warned);
2340 }
2341
2342 switch (r_type)
2343 {
2344 case R_390_GOTPLT12:
2345 case R_390_GOTPLT16:
2346 case R_390_GOTPLT20:
2347 case R_390_GOTPLT32:
2348 case R_390_GOTPLTENT:
2349 /* There are three cases for a GOTPLT relocation. 1) The
2350 relocation is against the jump slot entry of a plt that
2351 will get emitted to the output file. 2) The relocation
2352 is against the jump slot of a plt entry that has been
2353 removed. elf_s390_adjust_gotplt has created a GOT entry
2354 as replacement. 3) The relocation is against a local symbol.
2355 Cases 2) and 3) are the same as the GOT relocation code
2356 so we just have to test for case 1 and fall through for
2357 the other two. */
2358 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2359 {
2360 bfd_vma plt_index;
2361
2362 /* Calc. index no.
2363 Current offset - size first entry / entry size. */
2364 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2365 PLT_ENTRY_SIZE;
2366
2367 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2368 addr & GOT addr. */
2369 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2370 unresolved_reloc = FALSE;
2371
2372 if (r_type == R_390_GOTPLTENT)
2373 relocation += htab->sgot->output_section->vma;
2374 break;
2375 }
2376 /* Fall through. */
2377
2378 case R_390_GOT12:
2379 case R_390_GOT16:
2380 case R_390_GOT20:
2381 case R_390_GOT32:
2382 case R_390_GOTENT:
2383 /* Relocation is to the entry for this symbol in the global
2384 offset table. */
2385 if (htab->sgot == NULL)
2386 abort ();
2387
2388 if (h != NULL)
2389 {
2390 bfd_boolean dyn;
2391
2392 off = h->got.offset;
2393 dyn = htab->elf.dynamic_sections_created;
2394 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2395 || (info->shared
2396 && (info->symbolic
2397 || h->dynindx == -1
2398 || h->forced_local)
2399 && h->def_regular)
2400 || (ELF_ST_VISIBILITY (h->other)
2401 && h->root.type == bfd_link_hash_undefweak))
2402 {
2403 /* This is actually a static link, or it is a
2404 -Bsymbolic link and the symbol is defined
2405 locally, or the symbol was forced to be local
2406 because of a version file. We must initialize
2407 this entry in the global offset table. Since the
2408 offset must always be a multiple of 2, we use the
2409 least significant bit to record whether we have
2410 initialized it already.
2411
2412 When doing a dynamic link, we create a .rel.got
2413 relocation entry to initialize the value. This
2414 is done in the finish_dynamic_symbol routine. */
2415 if ((off & 1) != 0)
2416 off &= ~1;
2417 else
2418 {
2419 bfd_put_32 (output_bfd, relocation,
2420 htab->sgot->contents + off);
2421 h->got.offset |= 1;
2422 }
2423 }
2424 else
2425 unresolved_reloc = FALSE;
2426 }
2427 else
2428 {
2429 if (local_got_offsets == NULL)
2430 abort ();
2431
2432 off = local_got_offsets[r_symndx];
2433
2434 /* The offset must always be a multiple of 4. We use
2435 the least significant bit to record whether we have
2436 already generated the necessary reloc. */
2437 if ((off & 1) != 0)
2438 off &= ~1;
2439 else
2440 {
2441 bfd_put_32 (output_bfd, relocation,
2442 htab->sgot->contents + off);
2443
2444 if (info->shared)
2445 {
2446 asection *srelgot;
2447 Elf_Internal_Rela outrel;
2448 bfd_byte *loc;
2449
2450 srelgot = htab->srelgot;
2451 if (srelgot == NULL)
2452 abort ();
2453
2454 outrel.r_offset = (htab->sgot->output_section->vma
2455 + htab->sgot->output_offset
2456 + off);
2457 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2458 outrel.r_addend = relocation;
2459 loc = srelgot->contents;
2460 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2461 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2462 }
2463
2464 local_got_offsets[r_symndx] |= 1;
2465 }
2466 }
2467
2468 if (off >= (bfd_vma) -2)
2469 abort ();
2470
2471 relocation = htab->sgot->output_offset + off;
2472
2473 /* For @GOTENT the relocation is against the offset between
2474 the instruction and the symbols entry in the GOT and not
2475 between the start of the GOT and the symbols entry. We
2476 add the vma of the GOT to get the correct value. */
2477 if ( r_type == R_390_GOTENT
2478 || r_type == R_390_GOTPLTENT)
2479 relocation += htab->sgot->output_section->vma;
2480
2481 break;
2482
2483 case R_390_GOTOFF16:
2484 case R_390_GOTOFF32:
2485 /* Relocation is relative to the start of the global offset
2486 table. */
2487
2488 /* Note that sgot->output_offset is not involved in this
2489 calculation. We always want the start of .got. If we
2490 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2491 permitted by the ABI, we might have to change this
2492 calculation. */
2493 relocation -= htab->sgot->output_section->vma;
2494 break;
2495
2496 case R_390_GOTPC:
2497 case R_390_GOTPCDBL:
2498 /* Use global offset table as symbol value. */
2499 relocation = htab->sgot->output_section->vma;
2500 unresolved_reloc = FALSE;
2501 break;
2502
2503 case R_390_PLT16DBL:
2504 case R_390_PLT32DBL:
2505 case R_390_PLT32:
2506 /* Relocation is to the entry for this symbol in the
2507 procedure linkage table. */
2508
2509 /* Resolve a PLT32 reloc against a local symbol directly,
2510 without using the procedure linkage table. */
2511 if (h == NULL)
2512 break;
2513
2514 if (h->plt.offset == (bfd_vma) -1
2515 || htab->splt == NULL)
2516 {
2517 /* We didn't make a PLT entry for this symbol. This
2518 happens when statically linking PIC code, or when
2519 using -Bsymbolic. */
2520 break;
2521 }
2522
2523 relocation = (htab->splt->output_section->vma
2524 + htab->splt->output_offset
2525 + h->plt.offset);
2526 unresolved_reloc = FALSE;
2527 break;
2528
2529 case R_390_PLTOFF16:
2530 case R_390_PLTOFF32:
2531 /* Relocation is to the entry for this symbol in the
2532 procedure linkage table relative to the start of the GOT. */
2533
2534 /* For local symbols or if we didn't make a PLT entry for
2535 this symbol resolve the symbol directly. */
2536 if ( h == NULL
2537 || h->plt.offset == (bfd_vma) -1
2538 || htab->splt == NULL)
2539 {
2540 relocation -= htab->sgot->output_section->vma;
2541 break;
2542 }
2543
2544 relocation = (htab->splt->output_section->vma
2545 + htab->splt->output_offset
2546 + h->plt.offset
2547 - htab->sgot->output_section->vma);
2548 unresolved_reloc = FALSE;
2549 break;
2550
2551 case R_390_8:
2552 case R_390_16:
2553 case R_390_32:
2554 case R_390_PC16:
2555 case R_390_PC16DBL:
2556 case R_390_PC32DBL:
2557 case R_390_PC32:
2558 /* r_symndx will be zero only for relocs against symbols
2559 from removed linkonce sections, or sections discarded by
2560 a linker script. */
2561 if (r_symndx == 0
2562 || (input_section->flags & SEC_ALLOC) == 0)
2563 break;
2564
2565 if ((info->shared
2566 && (h == NULL
2567 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2568 || h->root.type != bfd_link_hash_undefweak)
2569 && ((r_type != R_390_PC16
2570 && r_type != R_390_PC16DBL
2571 && r_type != R_390_PC32DBL
2572 && r_type != R_390_PC32)
2573 || (h != NULL
2574 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2575 || (ELIMINATE_COPY_RELOCS
2576 && !info->shared
2577 && h != NULL
2578 && h->dynindx != -1
2579 && !h->non_got_ref
2580 && ((h->def_dynamic
2581 && !h->def_regular)
2582 || h->root.type == bfd_link_hash_undefweak
2583 || h->root.type == bfd_link_hash_undefined)))
2584 {
2585 Elf_Internal_Rela outrel;
2586 bfd_boolean skip, relocate;
2587 asection *sreloc;
2588 bfd_byte *loc;
2589
2590 /* When generating a shared object, these relocations
2591 are copied into the output file to be resolved at run
2592 time. */
2593
2594 skip = FALSE;
2595 relocate = FALSE;
2596
2597 outrel.r_offset =
2598 _bfd_elf_section_offset (output_bfd, info, input_section,
2599 rel->r_offset);
2600 if (outrel.r_offset == (bfd_vma) -1)
2601 skip = TRUE;
2602 else if (outrel.r_offset == (bfd_vma) -2)
2603 skip = TRUE, relocate = TRUE;
2604 outrel.r_offset += (input_section->output_section->vma
2605 + input_section->output_offset);
2606
2607 if (skip)
2608 memset (&outrel, 0, sizeof outrel);
2609 else if (h != NULL
2610 && h->dynindx != -1
2611 && (r_type == R_390_PC16
2612 || r_type == R_390_PC16DBL
2613 || r_type == R_390_PC32DBL
2614 || r_type == R_390_PC32
2615 || !info->shared
2616 || !info->symbolic
2617 || !h->def_regular))
2618 {
2619 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2620 outrel.r_addend = rel->r_addend;
2621 }
2622 else
2623 {
2624 /* This symbol is local, or marked to become local. */
2625 outrel.r_addend = relocation + rel->r_addend;
2626 if (r_type == R_390_32)
2627 {
2628 relocate = TRUE;
2629 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2630 }
2631 else
2632 {
2633 long sindx;
2634
2635 if (bfd_is_abs_section (sec))
2636 sindx = 0;
2637 else if (sec == NULL || sec->owner == NULL)
2638 {
2639 bfd_set_error(bfd_error_bad_value);
2640 return FALSE;
2641 }
2642 else
2643 {
2644 asection *osec;
2645
2646 osec = sec->output_section;
2647 sindx = elf_section_data (osec)->dynindx;
2648 BFD_ASSERT (sindx > 0);
2649
2650 /* We are turning this relocation into one
2651 against a section symbol, so subtract out
2652 the output section's address but not the
2653 offset of the input section in the output
2654 section. */
2655
2656 outrel.r_addend -= osec->vma;
2657 }
2658 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2659 }
2660 }
2661
2662 sreloc = elf_section_data (input_section)->sreloc;
2663 if (sreloc == NULL)
2664 abort ();
2665
2666 loc = sreloc->contents;
2667 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2668 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2669
2670 /* If this reloc is against an external symbol, we do
2671 not want to fiddle with the addend. Otherwise, we
2672 need to include the symbol value so that it becomes
2673 an addend for the dynamic reloc. */
2674 if (! relocate)
2675 continue;
2676 }
2677 break;
2678
2679 /* Relocations for tls literal pool entries. */
2680 case R_390_TLS_IE32:
2681 if (info->shared)
2682 {
2683 Elf_Internal_Rela outrel;
2684 asection *sreloc;
2685 bfd_byte *loc;
2686
2687 outrel.r_offset = rel->r_offset
2688 + input_section->output_section->vma
2689 + input_section->output_offset;
2690 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2691 sreloc = elf_section_data (input_section)->sreloc;
2692 if (sreloc == NULL)
2693 abort ();
2694 loc = sreloc->contents;
2695 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2696 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2697 }
2698 /* Fall through. */
2699
2700 case R_390_TLS_GD32:
2701 case R_390_TLS_GOTIE32:
2702 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2703 tls_type = GOT_UNKNOWN;
2704 if (h == NULL && local_got_offsets)
2705 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2706 else if (h != NULL)
2707 {
2708 tls_type = elf_s390_hash_entry(h)->tls_type;
2709 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2710 r_type = R_390_TLS_LE32;
2711 }
2712 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2713 r_type = R_390_TLS_IE32;
2714
2715 if (r_type == R_390_TLS_LE32)
2716 {
2717 /* This relocation gets optimized away by the local exec
2718 access optimization. */
2719 BFD_ASSERT (! unresolved_reloc);
2720 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2721 contents + rel->r_offset);
2722 continue;
2723 }
2724
2725 if (htab->sgot == NULL)
2726 abort ();
2727
2728 if (h != NULL)
2729 off = h->got.offset;
2730 else
2731 {
2732 if (local_got_offsets == NULL)
2733 abort ();
2734
2735 off = local_got_offsets[r_symndx];
2736 }
2737
2738 emit_tls_relocs:
2739
2740 if ((off & 1) != 0)
2741 off &= ~1;
2742 else
2743 {
2744 Elf_Internal_Rela outrel;
2745 bfd_byte *loc;
2746 int dr_type, indx;
2747
2748 if (htab->srelgot == NULL)
2749 abort ();
2750
2751 outrel.r_offset = (htab->sgot->output_section->vma
2752 + htab->sgot->output_offset + off);
2753
2754 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2755 if (r_type == R_390_TLS_GD32)
2756 dr_type = R_390_TLS_DTPMOD;
2757 else
2758 dr_type = R_390_TLS_TPOFF;
2759 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2760 outrel.r_addend = relocation - dtpoff_base (info);
2761 else
2762 outrel.r_addend = 0;
2763 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2764 loc = htab->srelgot->contents;
2765 loc += htab->srelgot->reloc_count++
2766 * sizeof (Elf32_External_Rela);
2767 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2768
2769 if (r_type == R_390_TLS_GD32)
2770 {
2771 if (indx == 0)
2772 {
2773 BFD_ASSERT (! unresolved_reloc);
2774 bfd_put_32 (output_bfd,
2775 relocation - dtpoff_base (info),
2776 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2777 }
2778 else
2779 {
2780 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2781 outrel.r_offset += GOT_ENTRY_SIZE;
2782 outrel.r_addend = 0;
2783 htab->srelgot->reloc_count++;
2784 loc += sizeof (Elf32_External_Rela);
2785 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2786 }
2787 }
2788
2789 if (h != NULL)
2790 h->got.offset |= 1;
2791 else
2792 local_got_offsets[r_symndx] |= 1;
2793 }
2794
2795 if (off >= (bfd_vma) -2)
2796 abort ();
2797 if (r_type == ELF32_R_TYPE (rel->r_info))
2798 {
2799 relocation = htab->sgot->output_offset + off;
2800 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2801 relocation += htab->sgot->output_section->vma;
2802 unresolved_reloc = FALSE;
2803 }
2804 else
2805 {
2806 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2807 contents + rel->r_offset);
2808 continue;
2809 }
2810 break;
2811
2812 case R_390_TLS_GOTIE12:
2813 case R_390_TLS_GOTIE20:
2814 case R_390_TLS_IEENT:
2815 if (h == NULL)
2816 {
2817 if (local_got_offsets == NULL)
2818 abort();
2819 off = local_got_offsets[r_symndx];
2820 if (info->shared)
2821 goto emit_tls_relocs;
2822 }
2823 else
2824 {
2825 off = h->got.offset;
2826 tls_type = elf_s390_hash_entry(h)->tls_type;
2827 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2828 goto emit_tls_relocs;
2829 }
2830
2831 if (htab->sgot == NULL)
2832 abort ();
2833
2834 BFD_ASSERT (! unresolved_reloc);
2835 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2836 htab->sgot->contents + off);
2837 relocation = htab->sgot->output_offset + off;
2838 if (r_type == R_390_TLS_IEENT)
2839 relocation += htab->sgot->output_section->vma;
2840 unresolved_reloc = FALSE;
2841 break;
2842
2843 case R_390_TLS_LDM32:
2844 if (! info->shared)
2845 /* The literal pool entry this relocation refers to gets ignored
2846 by the optimized code of the local exec model. Do nothing
2847 and the value will turn out zero. */
2848 continue;
2849
2850 if (htab->sgot == NULL)
2851 abort ();
2852
2853 off = htab->tls_ldm_got.offset;
2854 if (off & 1)
2855 off &= ~1;
2856 else
2857 {
2858 Elf_Internal_Rela outrel;
2859 bfd_byte *loc;
2860
2861 if (htab->srelgot == NULL)
2862 abort ();
2863
2864 outrel.r_offset = (htab->sgot->output_section->vma
2865 + htab->sgot->output_offset + off);
2866
2867 bfd_put_32 (output_bfd, 0,
2868 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2869 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2870 outrel.r_addend = 0;
2871 loc = htab->srelgot->contents;
2872 loc += htab->srelgot->reloc_count++
2873 * sizeof (Elf32_External_Rela);
2874 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2875 htab->tls_ldm_got.offset |= 1;
2876 }
2877 relocation = htab->sgot->output_offset + off;
2878 unresolved_reloc = FALSE;
2879 break;
2880
2881 case R_390_TLS_LE32:
2882 if (info->shared)
2883 {
2884 /* Linking a shared library with non-fpic code requires
2885 a R_390_TLS_TPOFF relocation. */
2886 Elf_Internal_Rela outrel;
2887 asection *sreloc;
2888 bfd_byte *loc;
2889 int indx;
2890
2891 outrel.r_offset = rel->r_offset
2892 + input_section->output_section->vma
2893 + input_section->output_offset;
2894 if (h != NULL && h->dynindx != -1)
2895 indx = h->dynindx;
2896 else
2897 indx = 0;
2898 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2899 if (indx == 0)
2900 outrel.r_addend = relocation - dtpoff_base (info);
2901 else
2902 outrel.r_addend = 0;
2903 sreloc = elf_section_data (input_section)->sreloc;
2904 if (sreloc == NULL)
2905 abort ();
2906 loc = sreloc->contents;
2907 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2908 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2909 }
2910 else
2911 {
2912 BFD_ASSERT (! unresolved_reloc);
2913 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2914 contents + rel->r_offset);
2915 }
2916 continue;
2917
2918 case R_390_TLS_LDO32:
2919 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2920 relocation -= dtpoff_base (info);
2921 else
2922 /* When converting LDO to LE, we must negate. */
2923 relocation = -tpoff (info, relocation);
2924 break;
2925
2926 /* Relocations for tls instructions. */
2927 case R_390_TLS_LOAD:
2928 case R_390_TLS_GDCALL:
2929 case R_390_TLS_LDCALL:
2930 tls_type = GOT_UNKNOWN;
2931 if (h == NULL && local_got_offsets)
2932 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2933 else if (h != NULL)
2934 tls_type = elf_s390_hash_entry(h)->tls_type;
2935
2936 if (tls_type == GOT_TLS_GD)
2937 continue;
2938
2939 if (r_type == R_390_TLS_LOAD)
2940 {
2941 if (!info->shared && (h == NULL || h->dynindx == -1))
2942 {
2943 /* IE->LE transition. Four valid cases:
2944 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2945 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2946 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2947 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2948 unsigned int insn, ry;
2949
2950 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2951 ry = 0;
2952 if ((insn & 0xff00f000) == 0x58000000)
2953 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2954 ry = (insn & 0x000f0000);
2955 else if ((insn & 0xff0f0000) == 0x58000000)
2956 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2957 ry = (insn & 0x0000f000) << 4;
2958 else if ((insn & 0xff00f000) == 0x5800c000)
2959 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2960 ry = (insn & 0x000f0000);
2961 else if ((insn & 0xff0f0000) == 0x580c0000)
2962 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2963 ry = (insn & 0x0000f000) << 4;
2964 else
2965 invalid_tls_insn (input_bfd, input_section, rel);
2966 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2967 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2968 }
2969 }
2970 else if (r_type == R_390_TLS_GDCALL)
2971 {
2972 unsigned int insn;
2973
2974 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2975 if ((insn & 0xff000fff) != 0x4d000000)
2976 invalid_tls_insn (input_bfd, input_section, rel);
2977 if (!info->shared && (h == NULL || h->dynindx == -1))
2978 /* GD->LE transition.
2979 bas %r14,0(%rx,%r13) -> bc 0,0 */
2980 insn = 0x47000000;
2981 else
2982 /* GD->IE transition.
2983 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2984 insn = 0x5822c000;
2985 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2986 }
2987 else if (r_type == R_390_TLS_LDCALL)
2988 {
2989 if (!info->shared)
2990 {
2991 unsigned int insn;
2992
2993 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2994 if ((insn & 0xff000fff) != 0x4d000000)
2995 invalid_tls_insn (input_bfd, input_section, rel);
2996 /* LD->LE transition.
2997 bas %r14,0(%rx,%r13) -> bc 0,0 */
2998 insn = 0x47000000;
2999 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3000 }
3001 }
3002 continue;
3003
3004 default:
3005 break;
3006 }
3007
3008 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3009 because such sections are not SEC_ALLOC and thus ld.so will
3010 not process them. */
3011 if (unresolved_reloc
3012 && !((input_section->flags & SEC_DEBUGGING) != 0
3013 && h->def_dynamic))
3014 (*_bfd_error_handler)
3015 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3016 input_bfd,
3017 input_section,
3018 (long) rel->r_offset,
3019 howto->name,
3020 h->root.root.string);
3021
3022 if (r_type == R_390_20
3023 || r_type == R_390_GOT20
3024 || r_type == R_390_GOTPLT20
3025 || r_type == R_390_TLS_GOTIE20)
3026 {
3027 relocation += rel->r_addend;
3028 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3029 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3030 contents, rel->r_offset,
3031 relocation, 0);
3032 }
3033 else
3034 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3035 contents, rel->r_offset,
3036 relocation, rel->r_addend);
3037
3038 if (r != bfd_reloc_ok)
3039 {
3040 const char *name;
3041
3042 if (h != NULL)
3043 name = h->root.root.string;
3044 else
3045 {
3046 name = bfd_elf_string_from_elf_section (input_bfd,
3047 symtab_hdr->sh_link,
3048 sym->st_name);
3049 if (name == NULL)
3050 return FALSE;
3051 if (*name == '\0')
3052 name = bfd_section_name (input_bfd, sec);
3053 }
3054
3055 if (r == bfd_reloc_overflow)
3056 {
3057
3058 if (! ((*info->callbacks->reloc_overflow)
3059 (info, (h ? &h->root : NULL), name, howto->name,
3060 (bfd_vma) 0, input_bfd, input_section,
3061 rel->r_offset)))
3062 return FALSE;
3063 }
3064 else
3065 {
3066 (*_bfd_error_handler)
3067 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3068 input_bfd, input_section,
3069 (long) rel->r_offset, name, (int) r);
3070 return FALSE;
3071 }
3072 }
3073 }
3074
3075 return TRUE;
3076 }
3077
3078 /* Finish up dynamic symbol handling. We set the contents of various
3079 dynamic sections here. */
3080
3081 static bfd_boolean
3082 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3083 bfd *output_bfd;
3084 struct bfd_link_info *info;
3085 struct elf_link_hash_entry *h;
3086 Elf_Internal_Sym *sym;
3087 {
3088 struct elf_s390_link_hash_table *htab;
3089
3090 htab = elf_s390_hash_table (info);
3091
3092 if (h->plt.offset != (bfd_vma) -1)
3093 {
3094 bfd_vma plt_index;
3095 bfd_vma got_offset;
3096 Elf_Internal_Rela rela;
3097 bfd_byte *loc;
3098 bfd_vma relative_offset;
3099
3100 /* This symbol has an entry in the procedure linkage table. Set
3101 it up. */
3102 if (h->dynindx == -1
3103 || htab->splt == NULL
3104 || htab->sgotplt == NULL
3105 || htab->srelplt == NULL)
3106 abort ();
3107
3108 /* Calc. index no.
3109 Current offset - size first entry / entry size. */
3110 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3111
3112 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3113 addr & GOT addr. */
3114 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3115
3116 /* S390 uses halfwords for relative branch calc! */
3117 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3118 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3119 /* If offset is > 32768, branch to a previous branch
3120 390 can only handle +-64 K jumps. */
3121 if ( -32768 > (int) relative_offset )
3122 relative_offset
3123 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3124
3125 /* Fill in the entry in the procedure linkage table. */
3126 if (!info->shared)
3127 {
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3129 htab->splt->contents + h->plt.offset);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3131 htab->splt->contents + h->plt.offset + 4);
3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3133 htab->splt->contents + h->plt.offset + 8);
3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3135 htab->splt->contents + h->plt.offset + 12);
3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3137 htab->splt->contents + h->plt.offset + 16);
3138 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3139 htab->splt->contents + h->plt.offset + 20);
3140 bfd_put_32 (output_bfd,
3141 (htab->sgotplt->output_section->vma
3142 + htab->sgotplt->output_offset
3143 + got_offset),
3144 htab->splt->contents + h->plt.offset + 24);
3145 }
3146 else if (got_offset < 4096)
3147 {
3148 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3149 htab->splt->contents + h->plt.offset);
3150 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3151 htab->splt->contents + h->plt.offset + 4);
3152 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3153 htab->splt->contents + h->plt.offset + 8);
3154 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3155 htab->splt->contents + h->plt.offset + 12);
3156 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3157 htab->splt->contents + h->plt.offset + 16);
3158 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3159 htab->splt->contents + h->plt.offset + 20);
3160 bfd_put_32 (output_bfd, (bfd_vma) 0,
3161 htab->splt->contents + h->plt.offset + 24);
3162 }
3163 else if (got_offset < 32768)
3164 {
3165 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3166 htab->splt->contents + h->plt.offset);
3167 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3168 htab->splt->contents + h->plt.offset + 4);
3169 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3170 htab->splt->contents + h->plt.offset + 8);
3171 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3172 htab->splt->contents + h->plt.offset + 12);
3173 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3174 htab->splt->contents + h->plt.offset + 16);
3175 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3176 htab->splt->contents + h->plt.offset + 20);
3177 bfd_put_32 (output_bfd, (bfd_vma) 0,
3178 htab->splt->contents + h->plt.offset + 24);
3179 }
3180 else
3181 {
3182 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3183 htab->splt->contents + h->plt.offset);
3184 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3185 htab->splt->contents + h->plt.offset + 4);
3186 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3187 htab->splt->contents + h->plt.offset + 8);
3188 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3189 htab->splt->contents + h->plt.offset + 12);
3190 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3191 htab->splt->contents + h->plt.offset + 16);
3192 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3193 htab->splt->contents + h->plt.offset + 20);
3194 bfd_put_32 (output_bfd, got_offset,
3195 htab->splt->contents + h->plt.offset + 24);
3196 }
3197 /* Insert offset into reloc. table here. */
3198 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3199 htab->splt->contents + h->plt.offset + 28);
3200
3201 /* Fill in the entry in the global offset table.
3202 Points to instruction after GOT offset. */
3203 bfd_put_32 (output_bfd,
3204 (htab->splt->output_section->vma
3205 + htab->splt->output_offset
3206 + h->plt.offset
3207 + 12),
3208 htab->sgotplt->contents + got_offset);
3209
3210 /* Fill in the entry in the .rela.plt section. */
3211 rela.r_offset = (htab->sgotplt->output_section->vma
3212 + htab->sgotplt->output_offset
3213 + got_offset);
3214 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3215 rela.r_addend = 0;
3216 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3217 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3218
3219 if (!h->def_regular)
3220 {
3221 /* Mark the symbol as undefined, rather than as defined in
3222 the .plt section. Leave the value alone. This is a clue
3223 for the dynamic linker, to make function pointer
3224 comparisons work between an application and shared
3225 library. */
3226 sym->st_shndx = SHN_UNDEF;
3227 }
3228 }
3229
3230 if (h->got.offset != (bfd_vma) -1
3231 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3232 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3233 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3234 {
3235 Elf_Internal_Rela rela;
3236 bfd_byte *loc;
3237
3238 /* This symbol has an entry in the global offset table. Set it
3239 up. */
3240
3241 if (htab->sgot == NULL || htab->srelgot == NULL)
3242 abort ();
3243
3244 rela.r_offset = (htab->sgot->output_section->vma
3245 + htab->sgot->output_offset
3246 + (h->got.offset &~ (bfd_vma) 1));
3247
3248 /* If this is a static link, or it is a -Bsymbolic link and the
3249 symbol is defined locally or was forced to be local because
3250 of a version file, we just want to emit a RELATIVE reloc.
3251 The entry in the global offset table will already have been
3252 initialized in the relocate_section function. */
3253 if (info->shared
3254 && (info->symbolic
3255 || h->dynindx == -1
3256 || h->forced_local)
3257 && h->def_regular)
3258 {
3259 BFD_ASSERT((h->got.offset & 1) != 0);
3260 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3261 rela.r_addend = (h->root.u.def.value
3262 + h->root.u.def.section->output_section->vma
3263 + h->root.u.def.section->output_offset);
3264 }
3265 else
3266 {
3267 BFD_ASSERT((h->got.offset & 1) == 0);
3268 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3269 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3270 rela.r_addend = 0;
3271 }
3272
3273 loc = htab->srelgot->contents;
3274 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3275 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3276 }
3277
3278 if (h->needs_copy)
3279 {
3280 Elf_Internal_Rela rela;
3281 bfd_byte *loc;
3282
3283 /* This symbols needs a copy reloc. Set it up. */
3284
3285 if (h->dynindx == -1
3286 || (h->root.type != bfd_link_hash_defined
3287 && h->root.type != bfd_link_hash_defweak)
3288 || htab->srelbss == NULL)
3289 abort ();
3290
3291 rela.r_offset = (h->root.u.def.value
3292 + h->root.u.def.section->output_section->vma
3293 + h->root.u.def.section->output_offset);
3294 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3295 rela.r_addend = 0;
3296 loc = htab->srelbss->contents;
3297 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3298 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3299 }
3300
3301 /* Mark some specially defined symbols as absolute. */
3302 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3303 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3304 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3305 sym->st_shndx = SHN_ABS;
3306
3307 return TRUE;
3308 }
3309
3310 /* Used to decide how to sort relocs in an optimal manner for the
3311 dynamic linker, before writing them out. */
3312
3313 static enum elf_reloc_type_class
3314 elf_s390_reloc_type_class (rela)
3315 const Elf_Internal_Rela *rela;
3316 {
3317 switch ((int) ELF32_R_TYPE (rela->r_info))
3318 {
3319 case R_390_RELATIVE:
3320 return reloc_class_relative;
3321 case R_390_JMP_SLOT:
3322 return reloc_class_plt;
3323 case R_390_COPY:
3324 return reloc_class_copy;
3325 default:
3326 return reloc_class_normal;
3327 }
3328 }
3329
3330 /* Finish up the dynamic sections. */
3331
3332 static bfd_boolean
3333 elf_s390_finish_dynamic_sections (output_bfd, info)
3334 bfd *output_bfd;
3335 struct bfd_link_info *info;
3336 {
3337 struct elf_s390_link_hash_table *htab;
3338 bfd *dynobj;
3339 asection *sdyn;
3340
3341 htab = elf_s390_hash_table (info);
3342 dynobj = htab->elf.dynobj;
3343 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3344
3345 if (htab->elf.dynamic_sections_created)
3346 {
3347 Elf32_External_Dyn *dyncon, *dynconend;
3348
3349 if (sdyn == NULL || htab->sgot == NULL)
3350 abort ();
3351
3352 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3353 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3354 for (; dyncon < dynconend; dyncon++)
3355 {
3356 Elf_Internal_Dyn dyn;
3357 asection *s;
3358
3359 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3360
3361 switch (dyn.d_tag)
3362 {
3363 default:
3364 continue;
3365
3366 case DT_PLTGOT:
3367 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3368 break;
3369
3370 case DT_JMPREL:
3371 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3372 break;
3373
3374 case DT_PLTRELSZ:
3375 s = htab->srelplt->output_section;
3376 dyn.d_un.d_val = s->size;
3377 break;
3378 }
3379
3380 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3381 }
3382
3383 /* Fill in the special first entry in the procedure linkage table. */
3384 if (htab->splt && htab->splt->size > 0)
3385 {
3386 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3387 if (info->shared)
3388 {
3389 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3390 htab->splt->contents );
3391 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3392 htab->splt->contents +4 );
3393 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3394 htab->splt->contents +8 );
3395 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3396 htab->splt->contents +12 );
3397 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3398 htab->splt->contents +16 );
3399 }
3400 else
3401 {
3402 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3403 htab->splt->contents );
3404 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3405 htab->splt->contents +4 );
3406 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3407 htab->splt->contents +8 );
3408 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3409 htab->splt->contents +12 );
3410 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3411 htab->splt->contents +16 );
3412 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3413 htab->splt->contents +20 );
3414 bfd_put_32 (output_bfd,
3415 htab->sgotplt->output_section->vma
3416 + htab->sgotplt->output_offset,
3417 htab->splt->contents + 24);
3418 }
3419 elf_section_data (htab->splt->output_section)
3420 ->this_hdr.sh_entsize = 4;
3421 }
3422
3423 }
3424
3425 if (htab->sgotplt)
3426 {
3427 /* Fill in the first three entries in the global offset table. */
3428 if (htab->sgotplt->size > 0)
3429 {
3430 bfd_put_32 (output_bfd,
3431 (sdyn == NULL ? (bfd_vma) 0
3432 : sdyn->output_section->vma + sdyn->output_offset),
3433 htab->sgotplt->contents);
3434 /* One entry for shared object struct ptr. */
3435 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3436 /* One entry for _dl_runtime_resolve. */
3437 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3438 }
3439
3440 elf_section_data (htab->sgotplt->output_section)
3441 ->this_hdr.sh_entsize = 4;
3442 }
3443 return TRUE;
3444 }
3445
3446 static bfd_boolean
3447 elf_s390_grok_prstatus (abfd, note)
3448 bfd * abfd;
3449 Elf_Internal_Note * note;
3450 {
3451 int offset;
3452 unsigned int size;
3453
3454 switch (note->descsz)
3455 {
3456 default:
3457 return FALSE;
3458
3459 case 224: /* S/390 Linux. */
3460 /* pr_cursig */
3461 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3462
3463 /* pr_pid */
3464 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3465
3466 /* pr_reg */
3467 offset = 72;
3468 size = 144;
3469 break;
3470 }
3471
3472 /* Make a ".reg/999" section. */
3473 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3474 size, note->descpos + offset);
3475 }
3476
3477 /* Return address for Ith PLT stub in section PLT, for relocation REL
3478 or (bfd_vma) -1 if it should not be included. */
3479
3480 static bfd_vma
3481 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3482 const arelent *rel ATTRIBUTE_UNUSED)
3483 {
3484 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3485 }
3486
3487
3488 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3489 #define TARGET_BIG_NAME "elf32-s390"
3490 #define ELF_ARCH bfd_arch_s390
3491 #define ELF_MACHINE_CODE EM_S390
3492 #define ELF_MACHINE_ALT1 EM_S390_OLD
3493 #define ELF_MAXPAGESIZE 0x1000
3494
3495 #define elf_backend_can_gc_sections 1
3496 #define elf_backend_can_refcount 1
3497 #define elf_backend_want_got_plt 1
3498 #define elf_backend_plt_readonly 1
3499 #define elf_backend_want_plt_sym 0
3500 #define elf_backend_got_header_size 12
3501 #define elf_backend_rela_normal 1
3502
3503 #define elf_info_to_howto elf_s390_info_to_howto
3504
3505 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3506 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3507 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3508
3509 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3510 #define elf_backend_check_relocs elf_s390_check_relocs
3511 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3512 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3513 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3514 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3515 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3516 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3517 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3518 #define elf_backend_relocate_section elf_s390_relocate_section
3519 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3520 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3521 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3522 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3523
3524 #define bfd_elf32_mkobject elf_s390_mkobject
3525 #define elf_backend_object_p elf_s390_object_p
3526
3527 #include "elf32-target.h"
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