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58048be78a93939cd8ab7b9828acef33912810f9
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2011, 2012 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 3 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 "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 struct elf_s390_link_hash_entry;
50 static void elf_s390_adjust_gotplt
51 PARAMS ((struct elf_s390_link_hash_entry *));
52 static bfd_boolean elf_s390_adjust_dynamic_symbol
53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
54 static bfd_boolean allocate_dynrelocs
55 PARAMS ((struct elf_link_hash_entry *, PTR));
56 static bfd_boolean readonly_dynrelocs
57 PARAMS ((struct elf_link_hash_entry *, PTR));
58 static bfd_boolean elf_s390_size_dynamic_sections
59 PARAMS ((bfd *, struct bfd_link_info *));
60 static bfd_boolean elf_s390_relocate_section
61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
63 static bfd_boolean elf_s390_finish_dynamic_symbol
64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
65 Elf_Internal_Sym *));
66 static enum elf_reloc_type_class elf_s390_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
68 static bfd_boolean elf_s390_finish_dynamic_sections
69 PARAMS ((bfd *, struct bfd_link_info *));
70 static bfd_boolean elf_s390_object_p
71 PARAMS ((bfd *));
72 static bfd_boolean elf_s390_grok_prstatus
73 PARAMS ((bfd *, Elf_Internal_Note *));
74 static int elf_s390_tls_transition
75 PARAMS ((struct bfd_link_info *, int, int));
76 static bfd_reloc_status_type s390_tls_reloc
77 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
78 static bfd_vma dtpoff_base
79 PARAMS ((struct bfd_link_info *));
80 static bfd_vma tpoff
81 PARAMS ((struct bfd_link_info *, bfd_vma));
82 static void invalid_tls_insn
83 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
84 static bfd_reloc_status_type s390_elf_ldisp_reloc
85 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
86
87 #include "elf/s390.h"
88
89 /* The relocation "howto" table. */
90
91 static reloc_howto_type elf_howto_table[] =
92 {
93 HOWTO (R_390_NONE, /* type */
94 0, /* rightshift */
95 0, /* size (0 = byte, 1 = short, 2 = long) */
96 0, /* bitsize */
97 FALSE, /* pc_relative */
98 0, /* bitpos */
99 complain_overflow_dont, /* complain_on_overflow */
100 bfd_elf_generic_reloc, /* special_function */
101 "R_390_NONE", /* name */
102 FALSE, /* partial_inplace */
103 0, /* src_mask */
104 0, /* dst_mask */
105 FALSE), /* pcrel_offset */
106
107 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
109 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
110 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
111 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
115 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
117 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
123 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
125 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
127 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
131 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
133 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
135 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
137 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
139 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
141 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
143 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
145 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
147 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
149 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
150 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
151 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
152 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
153 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
157 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
158 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
159 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
160 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
162 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
164 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
165 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
167 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
169 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
171 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
172 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
173 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
174 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
175 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
176 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
177 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
178 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
180 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
181 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
182 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
183 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
184 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
185 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
186 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
187 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
188 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
189 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
190 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
192 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
194 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
196 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
197 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
199 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
200 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
202 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
204 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
205 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
206 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
207 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
208 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
209 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
210 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
211 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
212 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
213 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
214 };
215
216 /* GNU extension to record C++ vtable hierarchy. */
217 static reloc_howto_type elf32_s390_vtinherit_howto =
218 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
219 static reloc_howto_type elf32_s390_vtentry_howto =
220 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);
221
222 static reloc_howto_type *
223 elf_s390_reloc_type_lookup (abfd, code)
224 bfd *abfd ATTRIBUTE_UNUSED;
225 bfd_reloc_code_real_type code;
226 {
227 switch (code)
228 {
229 case BFD_RELOC_NONE:
230 return &elf_howto_table[(int) R_390_NONE];
231 case BFD_RELOC_8:
232 return &elf_howto_table[(int) R_390_8];
233 case BFD_RELOC_390_12:
234 return &elf_howto_table[(int) R_390_12];
235 case BFD_RELOC_16:
236 return &elf_howto_table[(int) R_390_16];
237 case BFD_RELOC_32:
238 return &elf_howto_table[(int) R_390_32];
239 case BFD_RELOC_CTOR:
240 return &elf_howto_table[(int) R_390_32];
241 case BFD_RELOC_32_PCREL:
242 return &elf_howto_table[(int) R_390_PC32];
243 case BFD_RELOC_390_GOT12:
244 return &elf_howto_table[(int) R_390_GOT12];
245 case BFD_RELOC_32_GOT_PCREL:
246 return &elf_howto_table[(int) R_390_GOT32];
247 case BFD_RELOC_390_PLT32:
248 return &elf_howto_table[(int) R_390_PLT32];
249 case BFD_RELOC_390_COPY:
250 return &elf_howto_table[(int) R_390_COPY];
251 case BFD_RELOC_390_GLOB_DAT:
252 return &elf_howto_table[(int) R_390_GLOB_DAT];
253 case BFD_RELOC_390_JMP_SLOT:
254 return &elf_howto_table[(int) R_390_JMP_SLOT];
255 case BFD_RELOC_390_RELATIVE:
256 return &elf_howto_table[(int) R_390_RELATIVE];
257 case BFD_RELOC_32_GOTOFF:
258 return &elf_howto_table[(int) R_390_GOTOFF32];
259 case BFD_RELOC_390_GOTPC:
260 return &elf_howto_table[(int) R_390_GOTPC];
261 case BFD_RELOC_390_GOT16:
262 return &elf_howto_table[(int) R_390_GOT16];
263 case BFD_RELOC_16_PCREL:
264 return &elf_howto_table[(int) R_390_PC16];
265 case BFD_RELOC_390_PC16DBL:
266 return &elf_howto_table[(int) R_390_PC16DBL];
267 case BFD_RELOC_390_PLT16DBL:
268 return &elf_howto_table[(int) R_390_PLT16DBL];
269 case BFD_RELOC_390_PC32DBL:
270 return &elf_howto_table[(int) R_390_PC32DBL];
271 case BFD_RELOC_390_PLT32DBL:
272 return &elf_howto_table[(int) R_390_PLT32DBL];
273 case BFD_RELOC_390_GOTPCDBL:
274 return &elf_howto_table[(int) R_390_GOTPCDBL];
275 case BFD_RELOC_390_GOTENT:
276 return &elf_howto_table[(int) R_390_GOTENT];
277 case BFD_RELOC_16_GOTOFF:
278 return &elf_howto_table[(int) R_390_GOTOFF16];
279 case BFD_RELOC_390_GOTPLT12:
280 return &elf_howto_table[(int) R_390_GOTPLT12];
281 case BFD_RELOC_390_GOTPLT16:
282 return &elf_howto_table[(int) R_390_GOTPLT16];
283 case BFD_RELOC_390_GOTPLT32:
284 return &elf_howto_table[(int) R_390_GOTPLT32];
285 case BFD_RELOC_390_GOTPLTENT:
286 return &elf_howto_table[(int) R_390_GOTPLTENT];
287 case BFD_RELOC_390_PLTOFF16:
288 return &elf_howto_table[(int) R_390_PLTOFF16];
289 case BFD_RELOC_390_PLTOFF32:
290 return &elf_howto_table[(int) R_390_PLTOFF32];
291 case BFD_RELOC_390_TLS_LOAD:
292 return &elf_howto_table[(int) R_390_TLS_LOAD];
293 case BFD_RELOC_390_TLS_GDCALL:
294 return &elf_howto_table[(int) R_390_TLS_GDCALL];
295 case BFD_RELOC_390_TLS_LDCALL:
296 return &elf_howto_table[(int) R_390_TLS_LDCALL];
297 case BFD_RELOC_390_TLS_GD32:
298 return &elf_howto_table[(int) R_390_TLS_GD32];
299 case BFD_RELOC_390_TLS_GOTIE12:
300 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
301 case BFD_RELOC_390_TLS_GOTIE32:
302 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
303 case BFD_RELOC_390_TLS_LDM32:
304 return &elf_howto_table[(int) R_390_TLS_LDM32];
305 case BFD_RELOC_390_TLS_IE32:
306 return &elf_howto_table[(int) R_390_TLS_IE32];
307 case BFD_RELOC_390_TLS_IEENT:
308 return &elf_howto_table[(int) R_390_TLS_IEENT];
309 case BFD_RELOC_390_TLS_LE32:
310 return &elf_howto_table[(int) R_390_TLS_LE32];
311 case BFD_RELOC_390_TLS_LDO32:
312 return &elf_howto_table[(int) R_390_TLS_LDO32];
313 case BFD_RELOC_390_TLS_DTPMOD:
314 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
315 case BFD_RELOC_390_TLS_DTPOFF:
316 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
317 case BFD_RELOC_390_TLS_TPOFF:
318 return &elf_howto_table[(int) R_390_TLS_TPOFF];
319 case BFD_RELOC_390_20:
320 return &elf_howto_table[(int) R_390_20];
321 case BFD_RELOC_390_GOT20:
322 return &elf_howto_table[(int) R_390_GOT20];
323 case BFD_RELOC_390_GOTPLT20:
324 return &elf_howto_table[(int) R_390_GOTPLT20];
325 case BFD_RELOC_390_TLS_GOTIE20:
326 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
327 case BFD_RELOC_VTABLE_INHERIT:
328 return &elf32_s390_vtinherit_howto;
329 case BFD_RELOC_VTABLE_ENTRY:
330 return &elf32_s390_vtentry_howto;
331 default:
332 break;
333 }
334 return 0;
335 }
336
337 static reloc_howto_type *
338 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
339 const char *r_name)
340 {
341 unsigned int i;
342
343 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
344 if (elf_howto_table[i].name != NULL
345 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
346 return &elf_howto_table[i];
347
348 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
349 return &elf32_s390_vtinherit_howto;
350 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
351 return &elf32_s390_vtentry_howto;
352
353 return NULL;
354 }
355
356 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
357 and elf32-s390.c has its own copy. */
358
359 static void
360 elf_s390_info_to_howto (abfd, cache_ptr, dst)
361 bfd *abfd ATTRIBUTE_UNUSED;
362 arelent *cache_ptr;
363 Elf_Internal_Rela *dst;
364 {
365 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
366 switch (r_type)
367 {
368 case R_390_GNU_VTINHERIT:
369 cache_ptr->howto = &elf32_s390_vtinherit_howto;
370 break;
371
372 case R_390_GNU_VTENTRY:
373 cache_ptr->howto = &elf32_s390_vtentry_howto;
374 break;
375
376 default:
377 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
378 {
379 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
380 abfd, (int) r_type);
381 r_type = R_390_NONE;
382 }
383 cache_ptr->howto = &elf_howto_table[r_type];
384 }
385 }
386
387 /* A relocation function which doesn't do anything. */
388 static bfd_reloc_status_type
389 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
390 output_bfd, error_message)
391 bfd *abfd ATTRIBUTE_UNUSED;
392 arelent *reloc_entry;
393 asymbol *symbol ATTRIBUTE_UNUSED;
394 PTR data ATTRIBUTE_UNUSED;
395 asection *input_section;
396 bfd *output_bfd;
397 char **error_message ATTRIBUTE_UNUSED;
398 {
399 if (output_bfd)
400 reloc_entry->address += input_section->output_offset;
401 return bfd_reloc_ok;
402 }
403
404 /* Handle the large displacement relocs. */
405 static bfd_reloc_status_type
406 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
407 output_bfd, error_message)
408 bfd *abfd ATTRIBUTE_UNUSED;
409 arelent *reloc_entry;
410 asymbol *symbol;
411 PTR data ATTRIBUTE_UNUSED;
412 asection *input_section;
413 bfd *output_bfd;
414 char **error_message ATTRIBUTE_UNUSED;
415 {
416 reloc_howto_type *howto = reloc_entry->howto;
417 bfd_vma relocation;
418 bfd_vma insn;
419
420 if (output_bfd != (bfd *) NULL
421 && (symbol->flags & BSF_SECTION_SYM) == 0
422 && (! howto->partial_inplace
423 || reloc_entry->addend == 0))
424 {
425 reloc_entry->address += input_section->output_offset;
426 return bfd_reloc_ok;
427 }
428
429 if (output_bfd != NULL)
430 return bfd_reloc_continue;
431
432 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
433 return bfd_reloc_outofrange;
434
435 relocation = (symbol->value
436 + symbol->section->output_section->vma
437 + symbol->section->output_offset);
438 relocation += reloc_entry->addend;
439 if (howto->pc_relative)
440 {
441 relocation -= (input_section->output_section->vma
442 + input_section->output_offset);
443 relocation -= reloc_entry->address;
444 }
445
446 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
447 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
448 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
449
450 if ((bfd_signed_vma) relocation < - 0x80000
451 || (bfd_signed_vma) relocation > 0x7ffff)
452 return bfd_reloc_overflow;
453 else
454 return bfd_reloc_ok;
455 }
456
457 static bfd_boolean
458 elf_s390_is_local_label_name (abfd, name)
459 bfd *abfd;
460 const char *name;
461 {
462 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
463 return TRUE;
464
465 return _bfd_elf_is_local_label_name (abfd, name);
466 }
467
468 /* Functions for the 390 ELF linker. */
469
470 /* The name of the dynamic interpreter. This is put in the .interp
471 section. */
472
473 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
474
475 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
476 copying dynamic variables from a shared lib into an app's dynbss
477 section, and instead use a dynamic relocation to point into the
478 shared lib. */
479 #define ELIMINATE_COPY_RELOCS 1
480
481 /* The size in bytes of the first entry in the procedure linkage table. */
482 #define PLT_FIRST_ENTRY_SIZE 32
483 /* The size in bytes of an entry in the procedure linkage table. */
484 #define PLT_ENTRY_SIZE 32
485
486 #define GOT_ENTRY_SIZE 4
487
488 /* The first three entries in a procedure linkage table are reserved,
489 and the initial contents are unimportant (we zero them out).
490 Subsequent entries look like this. See the SVR4 ABI 386
491 supplement to see how this works. */
492
493 /* For the s390, simple addr offset can only be 0 - 4096.
494 To use the full 2 GB address space, several instructions
495 are needed to load an address in a register and execute
496 a branch( or just saving the address)
497
498 Furthermore, only r 0 and 1 are free to use!!! */
499
500 /* The first 3 words in the GOT are then reserved.
501 Word 0 is the address of the dynamic table.
502 Word 1 is a pointer to a structure describing the object
503 Word 2 is used to point to the loader entry address.
504
505 The code for position independent PLT entries looks like this:
506
507 r12 holds addr of the current GOT at entry to the PLT
508
509 The GOT holds the address in the PLT to be executed.
510 The loader then gets:
511 24(15) = Pointer to the structure describing the object.
512 28(15) = Offset in symbol table
513
514 The loader must then find the module where the function is
515 and insert the address in the GOT.
516
517 Note: 390 can only address +- 64 K relative.
518 We check if offset > 65536, then make a relative branch -64xxx
519 back to a previous defined branch
520
521 PLT1: BASR 1,0 # 2 bytes
522 L 1,22(1) # 4 bytes Load offset in GOT in r 1
523 L 1,(1,12) # 4 bytes Load address from GOT in r1
524 BCR 15,1 # 2 bytes Jump to address
525 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
526 L 1,14(1) # 4 bytes Load offset in symol table in r1
527 BRC 15,-x # 4 bytes Jump to start of PLT
528 .word 0 # 2 bytes filler
529 .long ? # 4 bytes offset in GOT
530 .long ? # 4 bytes offset into symbol table
531
532 This was the general case. There are two additional, optimizes PLT
533 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
534 First the one for GOT offsets < 4096:
535
536 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
537 BCR 15,1 # 2 bytes Jump to address
538 .word 0,0,0 # 6 bytes filler
539 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
540 L 1,14(1) # 4 bytes Load offset in symbol table in r1
541 BRC 15,-x # 4 bytes Jump to start of PLT
542 .word 0,0,0 # 6 bytes filler
543 .long ? # 4 bytes offset into symbol table
544
545 Second the one for GOT offsets < 32768:
546
547 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
548 L 1,(1,12) # 4 bytes Load address from GOT to r1
549 BCR 15,1 # 2 bytes Jump to address
550 .word 0 # 2 bytes filler
551 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
552 L 1,14(1) # 4 bytes Load offset in symbol table in r1
553 BRC 15,-x # 4 bytes Jump to start of PLT
554 .word 0,0,0 # 6 bytes filler
555 .long ? # 4 bytes offset into symbol table
556
557 Total = 32 bytes per PLT entry
558
559 The code for static build PLT entries looks like this:
560
561 PLT1: BASR 1,0 # 2 bytes
562 L 1,22(1) # 4 bytes Load address of GOT entry
563 L 1,0(0,1) # 4 bytes Load address from GOT in r1
564 BCR 15,1 # 2 bytes Jump to address
565 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
566 L 1,14(1) # 4 bytes Load offset in symbol table in r1
567 BRC 15,-x # 4 bytes Jump to start of PLT
568 .word 0 # 2 bytes filler
569 .long ? # 4 bytes address of GOT entry
570 .long ? # 4 bytes offset into symbol table */
571
572 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
573 {
574 0x0d, 0x10, /* basr %r1,%r0 */
575 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
576 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
577 0x07, 0xf1, /* br %r1 */
578 0x0d, 0x10, /* basr %r1,%r0 */
579 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
580 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
581 0x00, 0x00, /* padding */
582 0x00, 0x00, 0x00, 0x00, /* GOT offset */
583 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
584 };
585
586 /* Generic PLT pic entry. */
587 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
588 {
589 0x0d, 0x10, /* basr %r1,%r0 */
590 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
591 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
592 0x07, 0xf1, /* br %r1 */
593 0x0d, 0x10, /* basr %r1,%r0 */
594 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
595 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
596 0x00, 0x00, /* padding */
597 0x00, 0x00, 0x00, 0x00, /* GOT offset */
598 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
599 };
600
601 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
602 when generating the PLT slot with the GOT offset. */
603 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
604 {
605 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
606 0x07, 0xf1, /* br %r1 */
607 0x00, 0x00, 0x00, 0x00, /* padding */
608 0x00, 0x00,
609 0x0d, 0x10, /* basr %r1,%r0 */
610 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
611 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
612 0x00, 0x00, 0x00, 0x00,
613 0x00, 0x00, 0x00, 0x00
614 };
615
616 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
617 when generating the PLT slot with the GOT offset. */
618 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
619 {
620 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
621 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
622 0x07, 0xf1, /* br %r1 */
623 0x00, 0x00,
624 0x0d, 0x10, /* basr %r1,%r0 */
625 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
626 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
627 0x00, 0x00, 0x00, 0x00,
628 0x00, 0x00, 0x00, 0x00,
629 0x00, 0x00
630 };
631
632 /* The first PLT entry pushes the offset into the symbol table
633 from R1 onto the stack at 8(15) and the loader object info
634 at 12(15), loads the loader address in R1 and jumps to it. */
635
636 /* The first entry in the PLT for PIC code:
637
638 PLT0:
639 ST 1,28(15) # R1 has offset into symbol table
640 L 1,4(12) # Get loader ino(object struct address)
641 ST 1,24(15) # Store address
642 L 1,8(12) # Entry address of loader in R1
643 BR 1 # Jump to loader
644
645 The first entry in the PLT for static code:
646
647 PLT0:
648 ST 1,28(15) # R1 has offset into symbol table
649 BASR 1,0
650 L 1,18(0,1) # Get address of GOT
651 MVC 24(4,15),4(1) # Move loader ino to stack
652 L 1,8(1) # Get address of loader
653 BR 1 # Jump to loader
654 .word 0 # filler
655 .long got # address of GOT */
656
657 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
658 {
659 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
660 0x0d, 0x10, /* basr %r1,%r0 */
661 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
662 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
663 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
664 0x07, 0xf1, /* br %r1 */
665 0x00, 0x00, 0x00, 0x00,
666 0x00, 0x00, 0x00, 0x00,
667 0x00, 0x00
668 };
669
670 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
671 {
672 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
673 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
674 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
675 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
676 0x07, 0xf1, /* br %r1 */
677 0x00, 0x00, 0x00, 0x00,
678 0x00, 0x00, 0x00, 0x00,
679 0x00, 0x00, 0x00, 0x00,
680 0x00, 0x00
681 };
682
683
684 /* s390 ELF linker hash entry. */
685
686 struct elf_s390_link_hash_entry
687 {
688 struct elf_link_hash_entry elf;
689
690 /* Track dynamic relocs copied for this symbol. */
691 struct elf_dyn_relocs *dyn_relocs;
692
693 /* Number of GOTPLT references for a function. */
694 bfd_signed_vma gotplt_refcount;
695
696 #define GOT_UNKNOWN 0
697 #define GOT_NORMAL 1
698 #define GOT_TLS_GD 2
699 #define GOT_TLS_IE 3
700 #define GOT_TLS_IE_NLT 4
701 unsigned char tls_type;
702 };
703
704 #define elf_s390_hash_entry(ent) \
705 ((struct elf_s390_link_hash_entry *)(ent))
706
707 /* NOTE: Keep this structure in sync with
708 the one declared in elf64-s390.c. */
709 struct elf_s390_obj_tdata
710 {
711 struct elf_obj_tdata root;
712
713 /* TLS type for each local got entry. */
714 char *local_got_tls_type;
715 };
716
717 #define elf_s390_tdata(abfd) \
718 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
719
720 #define elf_s390_local_got_tls_type(abfd) \
721 (elf_s390_tdata (abfd)->local_got_tls_type)
722
723 #define is_s390_elf(bfd) \
724 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
725 && elf_tdata (bfd) != NULL \
726 && elf_object_id (bfd) == S390_ELF_DATA)
727
728 static bfd_boolean
729 elf_s390_mkobject (bfd *abfd)
730 {
731 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
732 S390_ELF_DATA);
733 }
734
735 static bfd_boolean
736 elf_s390_object_p (abfd)
737 bfd *abfd;
738 {
739 /* Set the right machine number for an s390 elf32 file. */
740 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
741 }
742
743 /* s390 ELF linker hash table. */
744
745 struct elf_s390_link_hash_table
746 {
747 struct elf_link_hash_table elf;
748
749 /* Short-cuts to get to dynamic linker sections. */
750 asection *sgot;
751 asection *sgotplt;
752 asection *srelgot;
753 asection *splt;
754 asection *srelplt;
755 asection *sdynbss;
756 asection *srelbss;
757
758 union {
759 bfd_signed_vma refcount;
760 bfd_vma offset;
761 } tls_ldm_got;
762
763 /* Small local sym cache. */
764 struct sym_cache sym_cache;
765 };
766
767 /* Get the s390 ELF linker hash table from a link_info structure. */
768
769 #define elf_s390_hash_table(p) \
770 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
771 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
772
773 /* Create an entry in an s390 ELF linker hash table. */
774
775 static struct bfd_hash_entry *
776 link_hash_newfunc (entry, table, string)
777 struct bfd_hash_entry *entry;
778 struct bfd_hash_table *table;
779 const char *string;
780 {
781 /* Allocate the structure if it has not already been allocated by a
782 subclass. */
783 if (entry == NULL)
784 {
785 entry = bfd_hash_allocate (table,
786 sizeof (struct elf_s390_link_hash_entry));
787 if (entry == NULL)
788 return entry;
789 }
790
791 /* Call the allocation method of the superclass. */
792 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
793 if (entry != NULL)
794 {
795 struct elf_s390_link_hash_entry *eh;
796
797 eh = (struct elf_s390_link_hash_entry *) entry;
798 eh->dyn_relocs = NULL;
799 eh->gotplt_refcount = 0;
800 eh->tls_type = GOT_UNKNOWN;
801 }
802
803 return entry;
804 }
805
806 /* Create an s390 ELF linker hash table. */
807
808 static struct bfd_link_hash_table *
809 elf_s390_link_hash_table_create (abfd)
810 bfd *abfd;
811 {
812 struct elf_s390_link_hash_table *ret;
813 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
814
815 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
816 if (ret == NULL)
817 return NULL;
818
819 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
820 sizeof (struct elf_s390_link_hash_entry),
821 S390_ELF_DATA))
822 {
823 free (ret);
824 return NULL;
825 }
826
827 ret->sgot = NULL;
828 ret->sgotplt = NULL;
829 ret->srelgot = NULL;
830 ret->splt = NULL;
831 ret->srelplt = NULL;
832 ret->sdynbss = NULL;
833 ret->srelbss = NULL;
834 ret->tls_ldm_got.refcount = 0;
835 ret->sym_cache.abfd = NULL;
836
837 return &ret->elf.root;
838 }
839
840 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
841 shortcuts to them in our hash table. */
842
843 static bfd_boolean
844 create_got_section (dynobj, info)
845 bfd *dynobj;
846 struct bfd_link_info *info;
847 {
848 struct elf_s390_link_hash_table *htab;
849
850 if (! _bfd_elf_create_got_section (dynobj, info))
851 return FALSE;
852
853 htab = elf_s390_hash_table (info);
854 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
855 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
856 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
857 if (!htab->sgot || !htab->sgotplt || !htab->srelgot)
858 abort ();
859
860 return TRUE;
861 }
862
863 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
864 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
865 hash table. */
866
867 static bfd_boolean
868 elf_s390_create_dynamic_sections (dynobj, info)
869 bfd *dynobj;
870 struct bfd_link_info *info;
871 {
872 struct elf_s390_link_hash_table *htab;
873
874 htab = elf_s390_hash_table (info);
875 if (!htab->sgot && !create_got_section (dynobj, info))
876 return FALSE;
877
878 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
879 return FALSE;
880
881 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
882 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
883 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
884 if (!info->shared)
885 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
886
887 if (!htab->splt || !htab->srelplt || !htab->sdynbss
888 || (!info->shared && !htab->srelbss))
889 abort ();
890
891 return TRUE;
892 }
893
894 /* Copy the extra info we tack onto an elf_link_hash_entry. */
895
896 static void
897 elf_s390_copy_indirect_symbol (info, dir, ind)
898 struct bfd_link_info *info;
899 struct elf_link_hash_entry *dir, *ind;
900 {
901 struct elf_s390_link_hash_entry *edir, *eind;
902
903 edir = (struct elf_s390_link_hash_entry *) dir;
904 eind = (struct elf_s390_link_hash_entry *) ind;
905
906 if (eind->dyn_relocs != NULL)
907 {
908 if (edir->dyn_relocs != NULL)
909 {
910 struct elf_dyn_relocs **pp;
911 struct elf_dyn_relocs *p;
912
913 /* Add reloc counts against the indirect sym to the direct sym
914 list. Merge any entries against the same section. */
915 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
916 {
917 struct elf_dyn_relocs *q;
918
919 for (q = edir->dyn_relocs; q != NULL; q = q->next)
920 if (q->sec == p->sec)
921 {
922 q->pc_count += p->pc_count;
923 q->count += p->count;
924 *pp = p->next;
925 break;
926 }
927 if (q == NULL)
928 pp = &p->next;
929 }
930 *pp = edir->dyn_relocs;
931 }
932
933 edir->dyn_relocs = eind->dyn_relocs;
934 eind->dyn_relocs = NULL;
935 }
936
937 if (ind->root.type == bfd_link_hash_indirect
938 && dir->got.refcount <= 0)
939 {
940 edir->tls_type = eind->tls_type;
941 eind->tls_type = GOT_UNKNOWN;
942 }
943
944 if (ELIMINATE_COPY_RELOCS
945 && ind->root.type != bfd_link_hash_indirect
946 && dir->dynamic_adjusted)
947 {
948 /* If called to transfer flags for a weakdef during processing
949 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
950 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
951 dir->ref_dynamic |= ind->ref_dynamic;
952 dir->ref_regular |= ind->ref_regular;
953 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
954 dir->needs_plt |= ind->needs_plt;
955 }
956 else
957 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
958 }
959
960 static int
961 elf_s390_tls_transition (info, r_type, is_local)
962 struct bfd_link_info *info;
963 int r_type;
964 int is_local;
965 {
966 if (info->shared)
967 return r_type;
968
969 switch (r_type)
970 {
971 case R_390_TLS_GD32:
972 case R_390_TLS_IE32:
973 if (is_local)
974 return R_390_TLS_LE32;
975 return R_390_TLS_IE32;
976 case R_390_TLS_GOTIE32:
977 if (is_local)
978 return R_390_TLS_LE32;
979 return R_390_TLS_GOTIE32;
980 case R_390_TLS_LDM32:
981 return R_390_TLS_LE32;
982 }
983
984 return r_type;
985 }
986
987 /* Look through the relocs for a section during the first phase, and
988 allocate space in the global offset table or procedure linkage
989 table. */
990
991 static bfd_boolean
992 elf_s390_check_relocs (abfd, info, sec, relocs)
993 bfd *abfd;
994 struct bfd_link_info *info;
995 asection *sec;
996 const Elf_Internal_Rela *relocs;
997 {
998 struct elf_s390_link_hash_table *htab;
999 Elf_Internal_Shdr *symtab_hdr;
1000 struct elf_link_hash_entry **sym_hashes;
1001 const Elf_Internal_Rela *rel;
1002 const Elf_Internal_Rela *rel_end;
1003 asection *sreloc;
1004 bfd_signed_vma *local_got_refcounts;
1005 int tls_type, old_tls_type;
1006
1007 if (info->relocatable)
1008 return TRUE;
1009
1010 BFD_ASSERT (is_s390_elf (abfd));
1011
1012 htab = elf_s390_hash_table (info);
1013 symtab_hdr = &elf_symtab_hdr (abfd);
1014 sym_hashes = elf_sym_hashes (abfd);
1015 local_got_refcounts = elf_local_got_refcounts (abfd);
1016
1017 sreloc = NULL;
1018
1019 rel_end = relocs + sec->reloc_count;
1020 for (rel = relocs; rel < rel_end; rel++)
1021 {
1022 unsigned int r_type;
1023 unsigned long r_symndx;
1024 struct elf_link_hash_entry *h;
1025
1026 r_symndx = ELF32_R_SYM (rel->r_info);
1027
1028 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1029 {
1030 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1031 abfd, r_symndx);
1032 return FALSE;
1033 }
1034
1035 if (r_symndx < symtab_hdr->sh_info)
1036 h = NULL;
1037 else
1038 {
1039 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1040 while (h->root.type == bfd_link_hash_indirect
1041 || h->root.type == bfd_link_hash_warning)
1042 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1043 }
1044
1045 /* Create got section and local_got_refcounts array if they
1046 are needed. */
1047 r_type = elf_s390_tls_transition (info,
1048 ELF32_R_TYPE (rel->r_info),
1049 h == NULL);
1050 switch (r_type)
1051 {
1052 case R_390_GOT12:
1053 case R_390_GOT16:
1054 case R_390_GOT20:
1055 case R_390_GOT32:
1056 case R_390_GOTENT:
1057 case R_390_GOTPLT12:
1058 case R_390_GOTPLT16:
1059 case R_390_GOTPLT20:
1060 case R_390_GOTPLT32:
1061 case R_390_GOTPLTENT:
1062 case R_390_TLS_GD32:
1063 case R_390_TLS_GOTIE12:
1064 case R_390_TLS_GOTIE20:
1065 case R_390_TLS_GOTIE32:
1066 case R_390_TLS_IEENT:
1067 case R_390_TLS_IE32:
1068 case R_390_TLS_LDM32:
1069 if (h == NULL
1070 && local_got_refcounts == NULL)
1071 {
1072 bfd_size_type size;
1073
1074 size = symtab_hdr->sh_info;
1075 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1076 local_got_refcounts = ((bfd_signed_vma *)
1077 bfd_zalloc (abfd, size));
1078 if (local_got_refcounts == NULL)
1079 return FALSE;
1080 elf_local_got_refcounts (abfd) = local_got_refcounts;
1081 elf_s390_local_got_tls_type (abfd)
1082 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1083 }
1084 /* Fall through. */
1085 case R_390_GOTOFF16:
1086 case R_390_GOTOFF32:
1087 case R_390_GOTPC:
1088 case R_390_GOTPCDBL:
1089 if (htab->sgot == NULL)
1090 {
1091 if (htab->elf.dynobj == NULL)
1092 htab->elf.dynobj = abfd;
1093 if (!create_got_section (htab->elf.dynobj, info))
1094 return FALSE;
1095 }
1096 }
1097
1098 switch (r_type)
1099 {
1100 case R_390_GOTOFF16:
1101 case R_390_GOTOFF32:
1102 case R_390_GOTPC:
1103 case R_390_GOTPCDBL:
1104 /* Got is created, nothing to be done. */
1105 break;
1106
1107 case R_390_PLT16DBL:
1108 case R_390_PLT32DBL:
1109 case R_390_PLT32:
1110 case R_390_PLTOFF16:
1111 case R_390_PLTOFF32:
1112 /* This symbol requires a procedure linkage table entry. We
1113 actually build the entry in adjust_dynamic_symbol,
1114 because this might be a case of linking PIC code which is
1115 never referenced by a dynamic object, in which case we
1116 don't need to generate a procedure linkage table entry
1117 after all. */
1118
1119 /* If this is a local symbol, we resolve it directly without
1120 creating a procedure linkage table entry. */
1121 if (h != NULL)
1122 {
1123 h->needs_plt = 1;
1124 h->plt.refcount += 1;
1125 }
1126 break;
1127
1128 case R_390_GOTPLT12:
1129 case R_390_GOTPLT16:
1130 case R_390_GOTPLT20:
1131 case R_390_GOTPLT32:
1132 case R_390_GOTPLTENT:
1133 /* This symbol requires either a procedure linkage table entry
1134 or an entry in the local got. We actually build the entry
1135 in adjust_dynamic_symbol because whether this is really a
1136 global reference can change and with it the fact if we have
1137 to create a plt entry or a local got entry. To be able to
1138 make a once global symbol a local one we have to keep track
1139 of the number of gotplt references that exist for this
1140 symbol. */
1141 if (h != NULL)
1142 {
1143 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1144 h->needs_plt = 1;
1145 h->plt.refcount += 1;
1146 }
1147 else
1148 local_got_refcounts[r_symndx] += 1;
1149 break;
1150
1151 case R_390_TLS_LDM32:
1152 htab->tls_ldm_got.refcount += 1;
1153 break;
1154
1155 case R_390_TLS_IE32:
1156 case R_390_TLS_GOTIE12:
1157 case R_390_TLS_GOTIE20:
1158 case R_390_TLS_GOTIE32:
1159 case R_390_TLS_IEENT:
1160 if (info->shared)
1161 info->flags |= DF_STATIC_TLS;
1162 /* Fall through. */
1163
1164 case R_390_GOT12:
1165 case R_390_GOT16:
1166 case R_390_GOT20:
1167 case R_390_GOT32:
1168 case R_390_GOTENT:
1169 case R_390_TLS_GD32:
1170 /* This symbol requires a global offset table entry. */
1171 switch (r_type)
1172 {
1173 default:
1174 case R_390_GOT12:
1175 case R_390_GOT16:
1176 case R_390_GOT20:
1177 case R_390_GOT32:
1178 case R_390_GOTENT:
1179 tls_type = GOT_NORMAL;
1180 break;
1181 case R_390_TLS_GD32:
1182 tls_type = GOT_TLS_GD;
1183 break;
1184 case R_390_TLS_IE32:
1185 case R_390_TLS_GOTIE32:
1186 tls_type = GOT_TLS_IE;
1187 break;
1188 case R_390_TLS_GOTIE12:
1189 case R_390_TLS_GOTIE20:
1190 case R_390_TLS_IEENT:
1191 tls_type = GOT_TLS_IE_NLT;
1192 break;
1193 }
1194
1195 if (h != NULL)
1196 {
1197 h->got.refcount += 1;
1198 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1199 }
1200 else
1201 {
1202 local_got_refcounts[r_symndx] += 1;
1203 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1204 }
1205 /* If a TLS symbol is accessed using IE at least once,
1206 there is no point to use dynamic model for it. */
1207 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1208 {
1209 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1210 {
1211 (*_bfd_error_handler)
1212 (_("%B: `%s' accessed both as normal and thread local symbol"),
1213 abfd, h->root.root.string);
1214 return FALSE;
1215 }
1216 if (old_tls_type > tls_type)
1217 tls_type = old_tls_type;
1218 }
1219
1220 if (old_tls_type != tls_type)
1221 {
1222 if (h != NULL)
1223 elf_s390_hash_entry (h)->tls_type = tls_type;
1224 else
1225 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1226 }
1227
1228 if (r_type != R_390_TLS_IE32)
1229 break;
1230 /* Fall through. */
1231
1232 case R_390_TLS_LE32:
1233 if (!info->shared)
1234 break;
1235 info->flags |= DF_STATIC_TLS;
1236 /* Fall through. */
1237
1238 case R_390_8:
1239 case R_390_16:
1240 case R_390_32:
1241 case R_390_PC16:
1242 case R_390_PC16DBL:
1243 case R_390_PC32DBL:
1244 case R_390_PC32:
1245 if (h != NULL && !info->shared)
1246 {
1247 /* If this reloc is in a read-only section, we might
1248 need a copy reloc. We can't check reliably at this
1249 stage whether the section is read-only, as input
1250 sections have not yet been mapped to output sections.
1251 Tentatively set the flag for now, and correct in
1252 adjust_dynamic_symbol. */
1253 h->non_got_ref = 1;
1254
1255 /* We may need a .plt entry if the function this reloc
1256 refers to is in a shared lib. */
1257 h->plt.refcount += 1;
1258 }
1259
1260 /* If we are creating a shared library, and this is a reloc
1261 against a global symbol, or a non PC relative reloc
1262 against a local symbol, then we need to copy the reloc
1263 into the shared library. However, if we are linking with
1264 -Bsymbolic, we do not need to copy a reloc against a
1265 global symbol which is defined in an object we are
1266 including in the link (i.e., DEF_REGULAR is set). At
1267 this point we have not seen all the input files, so it is
1268 possible that DEF_REGULAR is not set now but will be set
1269 later (it is never cleared). In case of a weak definition,
1270 DEF_REGULAR may be cleared later by a strong definition in
1271 a shared library. We account for that possibility below by
1272 storing information in the relocs_copied field of the hash
1273 table entry. A similar situation occurs when creating
1274 shared libraries and symbol visibility changes render the
1275 symbol local.
1276
1277 If on the other hand, we are creating an executable, we
1278 may need to keep relocations for symbols satisfied by a
1279 dynamic library if we manage to avoid copy relocs for the
1280 symbol. */
1281 if ((info->shared
1282 && (sec->flags & SEC_ALLOC) != 0
1283 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1284 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1285 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1286 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1287 || (h != NULL
1288 && (! SYMBOLIC_BIND (info, h)
1289 || h->root.type == bfd_link_hash_defweak
1290 || !h->def_regular))))
1291 || (ELIMINATE_COPY_RELOCS
1292 && !info->shared
1293 && (sec->flags & SEC_ALLOC) != 0
1294 && h != NULL
1295 && (h->root.type == bfd_link_hash_defweak
1296 || !h->def_regular)))
1297 {
1298 struct elf_dyn_relocs *p;
1299 struct elf_dyn_relocs **head;
1300
1301 /* We must copy these reloc types into the output file.
1302 Create a reloc section in dynobj and make room for
1303 this reloc. */
1304 if (sreloc == NULL)
1305 {
1306 if (htab->elf.dynobj == NULL)
1307 htab->elf.dynobj = abfd;
1308
1309 sreloc = _bfd_elf_make_dynamic_reloc_section
1310 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1311
1312 if (sreloc == NULL)
1313 return FALSE;
1314 }
1315
1316 /* If this is a global symbol, we count the number of
1317 relocations we need for this symbol. */
1318 if (h != NULL)
1319 {
1320 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1321 }
1322 else
1323 {
1324 /* Track dynamic relocs needed for local syms too.
1325 We really need local syms available to do this
1326 easily. Oh well. */
1327 asection *s;
1328 void *vpp;
1329 Elf_Internal_Sym *isym;
1330
1331 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1332 abfd, r_symndx);
1333 if (isym == NULL)
1334 return FALSE;
1335
1336 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1337 if (s == NULL)
1338 s = sec;
1339
1340 vpp = &elf_section_data (s)->local_dynrel;
1341 head = (struct elf_dyn_relocs **) vpp;
1342 }
1343
1344 p = *head;
1345 if (p == NULL || p->sec != sec)
1346 {
1347 bfd_size_type amt = sizeof *p;
1348
1349 p = ((struct elf_dyn_relocs *)
1350 bfd_alloc (htab->elf.dynobj, amt));
1351 if (p == NULL)
1352 return FALSE;
1353 p->next = *head;
1354 *head = p;
1355 p->sec = sec;
1356 p->count = 0;
1357 p->pc_count = 0;
1358 }
1359
1360 p->count += 1;
1361 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1362 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1363 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1364 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1365 p->pc_count += 1;
1366 }
1367 break;
1368
1369 /* This relocation describes the C++ object vtable hierarchy.
1370 Reconstruct it for later use during GC. */
1371 case R_390_GNU_VTINHERIT:
1372 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1373 return FALSE;
1374 break;
1375
1376 /* This relocation describes which C++ vtable entries are actually
1377 used. Record for later use during GC. */
1378 case R_390_GNU_VTENTRY:
1379 BFD_ASSERT (h != NULL);
1380 if (h != NULL
1381 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1382 return FALSE;
1383 break;
1384
1385 default:
1386 break;
1387 }
1388 }
1389
1390 return TRUE;
1391 }
1392
1393 /* Return the section that should be marked against GC for a given
1394 relocation. */
1395
1396 static asection *
1397 elf_s390_gc_mark_hook (asection *sec,
1398 struct bfd_link_info *info,
1399 Elf_Internal_Rela *rel,
1400 struct elf_link_hash_entry *h,
1401 Elf_Internal_Sym *sym)
1402 {
1403 if (h != NULL)
1404 switch (ELF32_R_TYPE (rel->r_info))
1405 {
1406 case R_390_GNU_VTINHERIT:
1407 case R_390_GNU_VTENTRY:
1408 return NULL;
1409 }
1410 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1411
1412 }
1413
1414 /* Update the got entry reference counts for the section being removed. */
1415
1416 static bfd_boolean
1417 elf_s390_gc_sweep_hook (bfd *abfd,
1418 struct bfd_link_info *info,
1419 asection *sec,
1420 const Elf_Internal_Rela *relocs)
1421 {
1422 Elf_Internal_Shdr *symtab_hdr;
1423 struct elf_link_hash_entry **sym_hashes;
1424 bfd_signed_vma *local_got_refcounts;
1425 const Elf_Internal_Rela *rel, *relend;
1426
1427 if (info->relocatable)
1428 return TRUE;
1429
1430 elf_section_data (sec)->local_dynrel = NULL;
1431
1432 symtab_hdr = &elf_symtab_hdr (abfd);
1433 sym_hashes = elf_sym_hashes (abfd);
1434 local_got_refcounts = elf_local_got_refcounts (abfd);
1435
1436 relend = relocs + sec->reloc_count;
1437 for (rel = relocs; rel < relend; rel++)
1438 {
1439 unsigned long r_symndx;
1440 unsigned int r_type;
1441 struct elf_link_hash_entry *h = NULL;
1442
1443 r_symndx = ELF32_R_SYM (rel->r_info);
1444 if (r_symndx >= symtab_hdr->sh_info)
1445 {
1446 struct elf_s390_link_hash_entry *eh;
1447 struct elf_dyn_relocs **pp;
1448 struct elf_dyn_relocs *p;
1449
1450 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1451 while (h->root.type == bfd_link_hash_indirect
1452 || h->root.type == bfd_link_hash_warning)
1453 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1454 eh = (struct elf_s390_link_hash_entry *) h;
1455
1456 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1457 if (p->sec == sec)
1458 {
1459 /* Everything must go for SEC. */
1460 *pp = p->next;
1461 break;
1462 }
1463 }
1464
1465 r_type = ELF32_R_TYPE (rel->r_info);
1466 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1467 switch (r_type)
1468 {
1469 case R_390_TLS_LDM32:
1470 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1471 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1472 break;
1473
1474 case R_390_TLS_GD32:
1475 case R_390_TLS_IE32:
1476 case R_390_TLS_GOTIE12:
1477 case R_390_TLS_GOTIE20:
1478 case R_390_TLS_GOTIE32:
1479 case R_390_TLS_IEENT:
1480 case R_390_GOT12:
1481 case R_390_GOT16:
1482 case R_390_GOT20:
1483 case R_390_GOT32:
1484 case R_390_GOTOFF16:
1485 case R_390_GOTOFF32:
1486 case R_390_GOTPC:
1487 case R_390_GOTPCDBL:
1488 case R_390_GOTENT:
1489 if (h != NULL)
1490 {
1491 if (h->got.refcount > 0)
1492 h->got.refcount -= 1;
1493 }
1494 else if (local_got_refcounts != NULL)
1495 {
1496 if (local_got_refcounts[r_symndx] > 0)
1497 local_got_refcounts[r_symndx] -= 1;
1498 }
1499 break;
1500
1501 case R_390_8:
1502 case R_390_12:
1503 case R_390_16:
1504 case R_390_20:
1505 case R_390_32:
1506 case R_390_PC16:
1507 case R_390_PC16DBL:
1508 case R_390_PC32DBL:
1509 case R_390_PC32:
1510 if (info->shared)
1511 break;
1512 /* Fall through. */
1513
1514 case R_390_PLT16DBL:
1515 case R_390_PLT32DBL:
1516 case R_390_PLT32:
1517 case R_390_PLTOFF16:
1518 case R_390_PLTOFF32:
1519 if (h != NULL)
1520 {
1521 if (h->plt.refcount > 0)
1522 h->plt.refcount -= 1;
1523 }
1524 break;
1525
1526 case R_390_GOTPLT12:
1527 case R_390_GOTPLT16:
1528 case R_390_GOTPLT20:
1529 case R_390_GOTPLT32:
1530 case R_390_GOTPLTENT:
1531 if (h != NULL)
1532 {
1533 if (h->plt.refcount > 0)
1534 {
1535 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1536 h->plt.refcount -= 1;
1537 }
1538 }
1539 else if (local_got_refcounts != NULL)
1540 {
1541 if (local_got_refcounts[r_symndx] > 0)
1542 local_got_refcounts[r_symndx] -= 1;
1543 }
1544 break;
1545
1546 default:
1547 break;
1548 }
1549 }
1550
1551 return TRUE;
1552 }
1553
1554 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1555 entry but we found we will not create any. Called when we find we will
1556 not have any PLT for this symbol, by for example
1557 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1558 or elf_s390_size_dynamic_sections if no dynamic sections will be
1559 created (we're only linking static objects). */
1560
1561 static void
1562 elf_s390_adjust_gotplt (h)
1563 struct elf_s390_link_hash_entry *h;
1564 {
1565 if (h->elf.root.type == bfd_link_hash_warning)
1566 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1567
1568 if (h->gotplt_refcount <= 0)
1569 return;
1570
1571 /* We simply add the number of gotplt references to the number
1572 * of got references for this symbol. */
1573 h->elf.got.refcount += h->gotplt_refcount;
1574 h->gotplt_refcount = -1;
1575 }
1576
1577 /* Adjust a symbol defined by a dynamic object and referenced by a
1578 regular object. The current definition is in some section of the
1579 dynamic object, but we're not including those sections. We have to
1580 change the definition to something the rest of the link can
1581 understand. */
1582
1583 static bfd_boolean
1584 elf_s390_adjust_dynamic_symbol (info, h)
1585 struct bfd_link_info *info;
1586 struct elf_link_hash_entry *h;
1587 {
1588 struct elf_s390_link_hash_table *htab;
1589 asection *s;
1590
1591 /* If this is a function, put it in the procedure linkage table. We
1592 will fill in the contents of the procedure linkage table later
1593 (although we could actually do it here). */
1594 if (h->type == STT_FUNC
1595 || h->needs_plt)
1596 {
1597 if (h->plt.refcount <= 0
1598 || SYMBOL_CALLS_LOCAL (info, h)
1599 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1600 && h->root.type != bfd_link_hash_undefweak))
1601 {
1602 /* This case can occur if we saw a PLT32 reloc in an input
1603 file, but the symbol was never referred to by a dynamic
1604 object, or if all references were garbage collected. In
1605 such a case, we don't actually need to build a procedure
1606 linkage table, and we can just do a PC32 reloc instead. */
1607 h->plt.offset = (bfd_vma) -1;
1608 h->needs_plt = 0;
1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1610 }
1611
1612 return TRUE;
1613 }
1614 else
1615 /* It's possible that we incorrectly decided a .plt reloc was
1616 needed for an R_390_PC32 reloc to a non-function sym in
1617 check_relocs. We can't decide accurately between function and
1618 non-function syms in check-relocs; Objects loaded later in
1619 the link may change h->type. So fix it now. */
1620 h->plt.offset = (bfd_vma) -1;
1621
1622 /* If this is a weak symbol, and there is a real definition, the
1623 processor independent code will have arranged for us to see the
1624 real definition first, and we can just use the same value. */
1625 if (h->u.weakdef != NULL)
1626 {
1627 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1628 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1629 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1630 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1631 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1632 h->non_got_ref = h->u.weakdef->non_got_ref;
1633 return TRUE;
1634 }
1635
1636 /* This is a reference to a symbol defined by a dynamic object which
1637 is not a function. */
1638
1639 /* If we are creating a shared library, we must presume that the
1640 only references to the symbol are via the global offset table.
1641 For such cases we need not do anything here; the relocations will
1642 be handled correctly by relocate_section. */
1643 if (info->shared)
1644 return TRUE;
1645
1646 /* If there are no references to this symbol that do not use the
1647 GOT, we don't need to generate a copy reloc. */
1648 if (!h->non_got_ref)
1649 return TRUE;
1650
1651 /* If -z nocopyreloc was given, we won't generate them either. */
1652 if (info->nocopyreloc)
1653 {
1654 h->non_got_ref = 0;
1655 return TRUE;
1656 }
1657
1658 if (ELIMINATE_COPY_RELOCS)
1659 {
1660 struct elf_s390_link_hash_entry * eh;
1661 struct elf_dyn_relocs *p;
1662
1663 eh = (struct elf_s390_link_hash_entry *) h;
1664 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1665 {
1666 s = p->sec->output_section;
1667 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1668 break;
1669 }
1670
1671 /* If we didn't find any dynamic relocs in read-only sections, then
1672 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1673 if (p == NULL)
1674 {
1675 h->non_got_ref = 0;
1676 return TRUE;
1677 }
1678 }
1679
1680 /* We must allocate the symbol in our .dynbss section, which will
1681 become part of the .bss section of the executable. There will be
1682 an entry for this symbol in the .dynsym section. The dynamic
1683 object will contain position independent code, so all references
1684 from the dynamic object to this symbol will go through the global
1685 offset table. The dynamic linker will use the .dynsym entry to
1686 determine the address it must put in the global offset table, so
1687 both the dynamic object and the regular object will refer to the
1688 same memory location for the variable. */
1689
1690 htab = elf_s390_hash_table (info);
1691
1692 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1693 copy the initial value out of the dynamic object and into the
1694 runtime process image. */
1695 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1696 {
1697 htab->srelbss->size += sizeof (Elf32_External_Rela);
1698 h->needs_copy = 1;
1699 }
1700
1701 s = htab->sdynbss;
1702
1703 return _bfd_elf_adjust_dynamic_copy (h, s);
1704 }
1705
1706 /* Allocate space in .plt, .got and associated reloc sections for
1707 dynamic relocs. */
1708
1709 static bfd_boolean
1710 allocate_dynrelocs (h, inf)
1711 struct elf_link_hash_entry *h;
1712 PTR inf;
1713 {
1714 struct bfd_link_info *info;
1715 struct elf_s390_link_hash_table *htab;
1716 struct elf_s390_link_hash_entry *eh;
1717 struct elf_dyn_relocs *p;
1718
1719 if (h->root.type == bfd_link_hash_indirect)
1720 return TRUE;
1721
1722 info = (struct bfd_link_info *) inf;
1723 htab = elf_s390_hash_table (info);
1724
1725 if (htab->elf.dynamic_sections_created
1726 && h->plt.refcount > 0)
1727 {
1728 /* Make sure this symbol is output as a dynamic symbol.
1729 Undefined weak syms won't yet be marked as dynamic. */
1730 if (h->dynindx == -1
1731 && !h->forced_local)
1732 {
1733 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1734 return FALSE;
1735 }
1736
1737 if (info->shared
1738 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1739 {
1740 asection *s = htab->splt;
1741
1742 /* If this is the first .plt entry, make room for the special
1743 first entry. */
1744 if (s->size == 0)
1745 s->size += PLT_FIRST_ENTRY_SIZE;
1746
1747 h->plt.offset = s->size;
1748
1749 /* If this symbol is not defined in a regular file, and we are
1750 not generating a shared library, then set the symbol to this
1751 location in the .plt. This is required to make function
1752 pointers compare as equal between the normal executable and
1753 the shared library. */
1754 if (! info->shared
1755 && !h->def_regular)
1756 {
1757 h->root.u.def.section = s;
1758 h->root.u.def.value = h->plt.offset;
1759 }
1760
1761 /* Make room for this entry. */
1762 s->size += PLT_ENTRY_SIZE;
1763
1764 /* We also need to make an entry in the .got.plt section, which
1765 will be placed in the .got section by the linker script. */
1766 htab->sgotplt->size += GOT_ENTRY_SIZE;
1767
1768 /* We also need to make an entry in the .rela.plt section. */
1769 htab->srelplt->size += sizeof (Elf32_External_Rela);
1770 }
1771 else
1772 {
1773 h->plt.offset = (bfd_vma) -1;
1774 h->needs_plt = 0;
1775 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1776 }
1777 }
1778 else
1779 {
1780 h->plt.offset = (bfd_vma) -1;
1781 h->needs_plt = 0;
1782 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1783 }
1784
1785 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1786 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1787 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1788 we can save the dynamic TLS relocation. */
1789 if (h->got.refcount > 0
1790 && !info->shared
1791 && h->dynindx == -1
1792 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1793 {
1794 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1795 /* For the GOTIE access without a literal pool entry the offset has
1796 to be stored somewhere. The immediate value in the instruction
1797 is not bit enough so the value is stored in the got. */
1798 {
1799 h->got.offset = htab->sgot->size;
1800 htab->sgot->size += GOT_ENTRY_SIZE;
1801 }
1802 else
1803 h->got.offset = (bfd_vma) -1;
1804 }
1805 else if (h->got.refcount > 0)
1806 {
1807 asection *s;
1808 bfd_boolean dyn;
1809 int tls_type = elf_s390_hash_entry(h)->tls_type;
1810
1811 /* Make sure this symbol is output as a dynamic symbol.
1812 Undefined weak syms won't yet be marked as dynamic. */
1813 if (h->dynindx == -1
1814 && !h->forced_local)
1815 {
1816 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1817 return FALSE;
1818 }
1819
1820 s = htab->sgot;
1821 h->got.offset = s->size;
1822 s->size += GOT_ENTRY_SIZE;
1823 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1824 if (tls_type == GOT_TLS_GD)
1825 s->size += GOT_ENTRY_SIZE;
1826 dyn = htab->elf.dynamic_sections_created;
1827 /* R_390_TLS_IE32 needs one dynamic relocation,
1828 R_390_TLS_GD32 needs one if local symbol and two if global. */
1829 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1830 || tls_type >= GOT_TLS_IE)
1831 htab->srelgot->size += sizeof (Elf32_External_Rela);
1832 else if (tls_type == GOT_TLS_GD)
1833 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1834 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1835 || h->root.type != bfd_link_hash_undefweak)
1836 && (info->shared
1837 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1838 htab->srelgot->size += sizeof (Elf32_External_Rela);
1839 }
1840 else
1841 h->got.offset = (bfd_vma) -1;
1842
1843 eh = (struct elf_s390_link_hash_entry *) h;
1844 if (eh->dyn_relocs == NULL)
1845 return TRUE;
1846
1847 /* In the shared -Bsymbolic case, discard space allocated for
1848 dynamic pc-relative relocs against symbols which turn out to be
1849 defined in regular objects. For the normal shared case, discard
1850 space for pc-relative relocs that have become local due to symbol
1851 visibility changes. */
1852
1853 if (info->shared)
1854 {
1855 if (SYMBOL_CALLS_LOCAL (info, h))
1856 {
1857 struct elf_dyn_relocs **pp;
1858
1859 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1860 {
1861 p->count -= p->pc_count;
1862 p->pc_count = 0;
1863 if (p->count == 0)
1864 *pp = p->next;
1865 else
1866 pp = &p->next;
1867 }
1868 }
1869
1870 /* Also discard relocs on undefined weak syms with non-default
1871 visibility. */
1872 if (eh->dyn_relocs != NULL
1873 && h->root.type == bfd_link_hash_undefweak)
1874 {
1875 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1876 eh->dyn_relocs = NULL;
1877
1878 /* Make sure undefined weak symbols are output as a dynamic
1879 symbol in PIEs. */
1880 else if (h->dynindx == -1
1881 && !h->forced_local)
1882 {
1883 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1884 return FALSE;
1885 }
1886 }
1887 }
1888 else if (ELIMINATE_COPY_RELOCS)
1889 {
1890 /* For the non-shared case, discard space for relocs against
1891 symbols which turn out to need copy relocs or are not
1892 dynamic. */
1893
1894 if (!h->non_got_ref
1895 && ((h->def_dynamic
1896 && !h->def_regular)
1897 || (htab->elf.dynamic_sections_created
1898 && (h->root.type == bfd_link_hash_undefweak
1899 || h->root.type == bfd_link_hash_undefined))))
1900 {
1901 /* Make sure this symbol is output as a dynamic symbol.
1902 Undefined weak syms won't yet be marked as dynamic. */
1903 if (h->dynindx == -1
1904 && !h->forced_local)
1905 {
1906 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1907 return FALSE;
1908 }
1909
1910 /* If that succeeded, we know we'll be keeping all the
1911 relocs. */
1912 if (h->dynindx != -1)
1913 goto keep;
1914 }
1915
1916 eh->dyn_relocs = NULL;
1917
1918 keep: ;
1919 }
1920
1921 /* Finally, allocate space. */
1922 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1923 {
1924 asection *sreloc = elf_section_data (p->sec)->sreloc;
1925
1926 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1927 }
1928
1929 return TRUE;
1930 }
1931
1932 /* Find any dynamic relocs that apply to read-only sections. */
1933
1934 static bfd_boolean
1935 readonly_dynrelocs (h, inf)
1936 struct elf_link_hash_entry *h;
1937 PTR inf;
1938 {
1939 struct elf_s390_link_hash_entry *eh;
1940 struct elf_dyn_relocs *p;
1941
1942 eh = (struct elf_s390_link_hash_entry *) h;
1943 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1944 {
1945 asection *s = p->sec->output_section;
1946
1947 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1948 {
1949 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1950
1951 info->flags |= DF_TEXTREL;
1952
1953 /* Not an error, just cut short the traversal. */
1954 return FALSE;
1955 }
1956 }
1957 return TRUE;
1958 }
1959
1960 /* Set the sizes of the dynamic sections. */
1961
1962 static bfd_boolean
1963 elf_s390_size_dynamic_sections (output_bfd, info)
1964 bfd *output_bfd ATTRIBUTE_UNUSED;
1965 struct bfd_link_info *info;
1966 {
1967 struct elf_s390_link_hash_table *htab;
1968 bfd *dynobj;
1969 asection *s;
1970 bfd_boolean relocs;
1971 bfd *ibfd;
1972
1973 htab = elf_s390_hash_table (info);
1974 dynobj = htab->elf.dynobj;
1975 if (dynobj == NULL)
1976 abort ();
1977
1978 if (htab->elf.dynamic_sections_created)
1979 {
1980 /* Set the contents of the .interp section to the interpreter. */
1981 if (info->executable)
1982 {
1983 s = bfd_get_section_by_name (dynobj, ".interp");
1984 if (s == NULL)
1985 abort ();
1986 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1987 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1988 }
1989 }
1990
1991 /* Set up .got offsets for local syms, and space for local dynamic
1992 relocs. */
1993 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1994 {
1995 bfd_signed_vma *local_got;
1996 bfd_signed_vma *end_local_got;
1997 char *local_tls_type;
1998 bfd_size_type locsymcount;
1999 Elf_Internal_Shdr *symtab_hdr;
2000 asection *srela;
2001
2002 if (! is_s390_elf (ibfd))
2003 continue;
2004
2005 for (s = ibfd->sections; s != NULL; s = s->next)
2006 {
2007 struct elf_dyn_relocs *p;
2008
2009 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2010 {
2011 if (!bfd_is_abs_section (p->sec)
2012 && bfd_is_abs_section (p->sec->output_section))
2013 {
2014 /* Input section has been discarded, either because
2015 it is a copy of a linkonce section or due to
2016 linker script /DISCARD/, so we'll be discarding
2017 the relocs too. */
2018 }
2019 else if (p->count != 0)
2020 {
2021 srela = elf_section_data (p->sec)->sreloc;
2022 srela->size += p->count * sizeof (Elf32_External_Rela);
2023 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2024 info->flags |= DF_TEXTREL;
2025 }
2026 }
2027 }
2028
2029 local_got = elf_local_got_refcounts (ibfd);
2030 if (!local_got)
2031 continue;
2032
2033 symtab_hdr = &elf_symtab_hdr (ibfd);
2034 locsymcount = symtab_hdr->sh_info;
2035 end_local_got = local_got + locsymcount;
2036 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2037 s = htab->sgot;
2038 srela = htab->srelgot;
2039 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2040 {
2041 if (*local_got > 0)
2042 {
2043 *local_got = s->size;
2044 s->size += GOT_ENTRY_SIZE;
2045 if (*local_tls_type == GOT_TLS_GD)
2046 s->size += GOT_ENTRY_SIZE;
2047 if (info->shared)
2048 srela->size += sizeof (Elf32_External_Rela);
2049 }
2050 else
2051 *local_got = (bfd_vma) -1;
2052 }
2053 }
2054
2055 if (htab->tls_ldm_got.refcount > 0)
2056 {
2057 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2058 relocs. */
2059 htab->tls_ldm_got.offset = htab->sgot->size;
2060 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2061 htab->srelgot->size += sizeof (Elf32_External_Rela);
2062 }
2063 else
2064 htab->tls_ldm_got.offset = -1;
2065
2066 /* Allocate global sym .plt and .got entries, and space for global
2067 sym dynamic relocs. */
2068 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2069
2070 /* We now have determined the sizes of the various dynamic sections.
2071 Allocate memory for them. */
2072 relocs = FALSE;
2073 for (s = dynobj->sections; s != NULL; s = s->next)
2074 {
2075 if ((s->flags & SEC_LINKER_CREATED) == 0)
2076 continue;
2077
2078 if (s == htab->splt
2079 || s == htab->sgot
2080 || s == htab->sgotplt
2081 || s == htab->sdynbss)
2082 {
2083 /* Strip this section if we don't need it; see the
2084 comment below. */
2085 }
2086 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2087 {
2088 if (s->size != 0)
2089 relocs = TRUE;
2090
2091 /* We use the reloc_count field as a counter if we need
2092 to copy relocs into the output file. */
2093 s->reloc_count = 0;
2094 }
2095 else
2096 {
2097 /* It's not one of our sections, so don't allocate space. */
2098 continue;
2099 }
2100
2101 if (s->size == 0)
2102 {
2103 /* If we don't need this section, strip it from the
2104 output file. This is to handle .rela.bss and
2105 .rela.plt. We must create it in
2106 create_dynamic_sections, because it must be created
2107 before the linker maps input sections to output
2108 sections. The linker does that before
2109 adjust_dynamic_symbol is called, and it is that
2110 function which decides whether anything needs to go
2111 into these sections. */
2112
2113 s->flags |= SEC_EXCLUDE;
2114 continue;
2115 }
2116
2117 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2118 continue;
2119
2120 /* Allocate memory for the section contents. We use bfd_zalloc
2121 here in case unused entries are not reclaimed before the
2122 section's contents are written out. This should not happen,
2123 but this way if it does, we get a R_390_NONE reloc instead
2124 of garbage. */
2125 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2126 if (s->contents == NULL)
2127 return FALSE;
2128 }
2129
2130 if (htab->elf.dynamic_sections_created)
2131 {
2132 /* Add some entries to the .dynamic section. We fill in the
2133 values later, in elf_s390_finish_dynamic_sections, but we
2134 must add the entries now so that we get the correct size for
2135 the .dynamic section. The DT_DEBUG entry is filled in by the
2136 dynamic linker and used by the debugger. */
2137 #define add_dynamic_entry(TAG, VAL) \
2138 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2139
2140 if (info->executable)
2141 {
2142 if (!add_dynamic_entry (DT_DEBUG, 0))
2143 return FALSE;
2144 }
2145
2146 if (htab->splt->size != 0)
2147 {
2148 if (!add_dynamic_entry (DT_PLTGOT, 0)
2149 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2150 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2151 || !add_dynamic_entry (DT_JMPREL, 0))
2152 return FALSE;
2153 }
2154
2155 if (relocs)
2156 {
2157 if (!add_dynamic_entry (DT_RELA, 0)
2158 || !add_dynamic_entry (DT_RELASZ, 0)
2159 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2160 return FALSE;
2161
2162 /* If any dynamic relocs apply to a read-only section,
2163 then we need a DT_TEXTREL entry. */
2164 if ((info->flags & DF_TEXTREL) == 0)
2165 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2166 (PTR) info);
2167
2168 if ((info->flags & DF_TEXTREL) != 0)
2169 {
2170 if (!add_dynamic_entry (DT_TEXTREL, 0))
2171 return FALSE;
2172 }
2173 }
2174 }
2175 #undef add_dynamic_entry
2176
2177 return TRUE;
2178 }
2179
2180 /* Return the base VMA address which should be subtracted from real addresses
2181 when resolving @dtpoff relocation.
2182 This is PT_TLS segment p_vaddr. */
2183
2184 static bfd_vma
2185 dtpoff_base (info)
2186 struct bfd_link_info *info;
2187 {
2188 /* If tls_sec is NULL, we should have signalled an error already. */
2189 if (elf_hash_table (info)->tls_sec == NULL)
2190 return 0;
2191 return elf_hash_table (info)->tls_sec->vma;
2192 }
2193
2194 /* Return the relocation value for @tpoff relocation
2195 if STT_TLS virtual address is ADDRESS. */
2196
2197 static bfd_vma
2198 tpoff (info, address)
2199 struct bfd_link_info *info;
2200 bfd_vma address;
2201 {
2202 struct elf_link_hash_table *htab = elf_hash_table (info);
2203
2204 /* If tls_sec is NULL, we should have signalled an error already. */
2205 if (htab->tls_sec == NULL)
2206 return 0;
2207 return htab->tls_size + htab->tls_sec->vma - address;
2208 }
2209
2210 /* Complain if TLS instruction relocation is against an invalid
2211 instruction. */
2212
2213 static void
2214 invalid_tls_insn (input_bfd, input_section, rel)
2215 bfd *input_bfd;
2216 asection *input_section;
2217 Elf_Internal_Rela *rel;
2218 {
2219 reloc_howto_type *howto;
2220
2221 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2222 (*_bfd_error_handler)
2223 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2224 input_bfd,
2225 input_section,
2226 (long) rel->r_offset,
2227 howto->name);
2228 bfd_set_error (bfd_error_bad_value);
2229 }
2230
2231 /* Relocate a 390 ELF section. */
2232
2233 static bfd_boolean
2234 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2235 contents, relocs, local_syms, local_sections)
2236 bfd *output_bfd;
2237 struct bfd_link_info *info;
2238 bfd *input_bfd;
2239 asection *input_section;
2240 bfd_byte *contents;
2241 Elf_Internal_Rela *relocs;
2242 Elf_Internal_Sym *local_syms;
2243 asection **local_sections;
2244 {
2245 struct elf_s390_link_hash_table *htab;
2246 Elf_Internal_Shdr *symtab_hdr;
2247 struct elf_link_hash_entry **sym_hashes;
2248 bfd_vma *local_got_offsets;
2249 Elf_Internal_Rela *rel;
2250 Elf_Internal_Rela *relend;
2251
2252 BFD_ASSERT (is_s390_elf (input_bfd));
2253
2254 htab = elf_s390_hash_table (info);
2255 symtab_hdr = &elf_symtab_hdr (input_bfd);
2256 sym_hashes = elf_sym_hashes (input_bfd);
2257 local_got_offsets = elf_local_got_offsets (input_bfd);
2258
2259 rel = relocs;
2260 relend = relocs + input_section->reloc_count;
2261 for (; rel < relend; rel++)
2262 {
2263 unsigned int r_type;
2264 reloc_howto_type *howto;
2265 unsigned long r_symndx;
2266 struct elf_link_hash_entry *h;
2267 Elf_Internal_Sym *sym;
2268 asection *sec;
2269 bfd_vma off;
2270 bfd_vma relocation;
2271 bfd_boolean unresolved_reloc;
2272 bfd_reloc_status_type r;
2273 int tls_type;
2274
2275 r_type = ELF32_R_TYPE (rel->r_info);
2276 if (r_type == (int) R_390_GNU_VTINHERIT
2277 || r_type == (int) R_390_GNU_VTENTRY)
2278 continue;
2279 if (r_type >= (int) R_390_max)
2280 {
2281 bfd_set_error (bfd_error_bad_value);
2282 return FALSE;
2283 }
2284
2285 howto = elf_howto_table + r_type;
2286 r_symndx = ELF32_R_SYM (rel->r_info);
2287
2288 h = NULL;
2289 sym = NULL;
2290 sec = NULL;
2291 unresolved_reloc = FALSE;
2292 if (r_symndx < symtab_hdr->sh_info)
2293 {
2294 sym = local_syms + r_symndx;
2295 sec = local_sections[r_symndx];
2296 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2297 }
2298 else
2299 {
2300 bfd_boolean warned ATTRIBUTE_UNUSED;
2301
2302 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2303 r_symndx, symtab_hdr, sym_hashes,
2304 h, sec, relocation,
2305 unresolved_reloc, warned);
2306 }
2307
2308 if (sec != NULL && elf_discarded_section (sec))
2309 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2310 rel, relend, howto, contents);
2311
2312 if (info->relocatable)
2313 continue;
2314
2315 switch (r_type)
2316 {
2317 case R_390_GOTPLT12:
2318 case R_390_GOTPLT16:
2319 case R_390_GOTPLT20:
2320 case R_390_GOTPLT32:
2321 case R_390_GOTPLTENT:
2322 /* There are three cases for a GOTPLT relocation. 1) The
2323 relocation is against the jump slot entry of a plt that
2324 will get emitted to the output file. 2) The relocation
2325 is against the jump slot of a plt entry that has been
2326 removed. elf_s390_adjust_gotplt has created a GOT entry
2327 as replacement. 3) The relocation is against a local symbol.
2328 Cases 2) and 3) are the same as the GOT relocation code
2329 so we just have to test for case 1 and fall through for
2330 the other two. */
2331 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2332 {
2333 bfd_vma plt_index;
2334
2335 /* Calc. index no.
2336 Current offset - size first entry / entry size. */
2337 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2338 PLT_ENTRY_SIZE;
2339
2340 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2341 addr & GOT addr. */
2342 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2343 unresolved_reloc = FALSE;
2344
2345 if (r_type == R_390_GOTPLTENT)
2346 relocation += htab->sgot->output_section->vma;
2347 break;
2348 }
2349 /* Fall through. */
2350
2351 case R_390_GOT12:
2352 case R_390_GOT16:
2353 case R_390_GOT20:
2354 case R_390_GOT32:
2355 case R_390_GOTENT:
2356 /* Relocation is to the entry for this symbol in the global
2357 offset table. */
2358 if (htab->sgot == NULL)
2359 abort ();
2360
2361 if (h != NULL)
2362 {
2363 bfd_boolean dyn;
2364
2365 off = h->got.offset;
2366 dyn = htab->elf.dynamic_sections_created;
2367 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2368 || (info->shared
2369 && SYMBOL_REFERENCES_LOCAL (info, h))
2370 || (ELF_ST_VISIBILITY (h->other)
2371 && h->root.type == bfd_link_hash_undefweak))
2372 {
2373 /* This is actually a static link, or it is a
2374 -Bsymbolic link and the symbol is defined
2375 locally, or the symbol was forced to be local
2376 because of a version file. We must initialize
2377 this entry in the global offset table. Since the
2378 offset must always be a multiple of 2, we use the
2379 least significant bit to record whether we have
2380 initialized it already.
2381
2382 When doing a dynamic link, we create a .rel.got
2383 relocation entry to initialize the value. This
2384 is done in the finish_dynamic_symbol routine. */
2385 if ((off & 1) != 0)
2386 off &= ~1;
2387 else
2388 {
2389 bfd_put_32 (output_bfd, relocation,
2390 htab->sgot->contents + off);
2391 h->got.offset |= 1;
2392 }
2393 }
2394 else
2395 unresolved_reloc = FALSE;
2396 }
2397 else
2398 {
2399 if (local_got_offsets == NULL)
2400 abort ();
2401
2402 off = local_got_offsets[r_symndx];
2403
2404 /* The offset must always be a multiple of 4. We use
2405 the least significant bit to record whether we have
2406 already generated the necessary reloc. */
2407 if ((off & 1) != 0)
2408 off &= ~1;
2409 else
2410 {
2411 bfd_put_32 (output_bfd, relocation,
2412 htab->sgot->contents + off);
2413
2414 if (info->shared)
2415 {
2416 asection *srelgot;
2417 Elf_Internal_Rela outrel;
2418 bfd_byte *loc;
2419
2420 srelgot = htab->srelgot;
2421 if (srelgot == NULL)
2422 abort ();
2423
2424 outrel.r_offset = (htab->sgot->output_section->vma
2425 + htab->sgot->output_offset
2426 + off);
2427 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2428 outrel.r_addend = relocation;
2429 loc = srelgot->contents;
2430 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2431 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2432 }
2433
2434 local_got_offsets[r_symndx] |= 1;
2435 }
2436 }
2437
2438 if (off >= (bfd_vma) -2)
2439 abort ();
2440
2441 relocation = htab->sgot->output_offset + off;
2442
2443 /* For @GOTENT the relocation is against the offset between
2444 the instruction and the symbols entry in the GOT and not
2445 between the start of the GOT and the symbols entry. We
2446 add the vma of the GOT to get the correct value. */
2447 if ( r_type == R_390_GOTENT
2448 || r_type == R_390_GOTPLTENT)
2449 relocation += htab->sgot->output_section->vma;
2450
2451 break;
2452
2453 case R_390_GOTOFF16:
2454 case R_390_GOTOFF32:
2455 /* Relocation is relative to the start of the global offset
2456 table. */
2457
2458 /* Note that sgot->output_offset is not involved in this
2459 calculation. We always want the start of .got. If we
2460 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2461 permitted by the ABI, we might have to change this
2462 calculation. */
2463 relocation -= htab->sgot->output_section->vma;
2464 break;
2465
2466 case R_390_GOTPC:
2467 case R_390_GOTPCDBL:
2468 /* Use global offset table as symbol value. */
2469 relocation = htab->sgot->output_section->vma;
2470 unresolved_reloc = FALSE;
2471 break;
2472
2473 case R_390_PLT16DBL:
2474 case R_390_PLT32DBL:
2475 case R_390_PLT32:
2476 /* Relocation is to the entry for this symbol in the
2477 procedure linkage table. */
2478
2479 /* Resolve a PLT32 reloc against a local symbol directly,
2480 without using the procedure linkage table. */
2481 if (h == NULL)
2482 break;
2483
2484 if (h->plt.offset == (bfd_vma) -1
2485 || htab->splt == NULL)
2486 {
2487 /* We didn't make a PLT entry for this symbol. This
2488 happens when statically linking PIC code, or when
2489 using -Bsymbolic. */
2490 break;
2491 }
2492
2493 relocation = (htab->splt->output_section->vma
2494 + htab->splt->output_offset
2495 + h->plt.offset);
2496 unresolved_reloc = FALSE;
2497 break;
2498
2499 case R_390_PLTOFF16:
2500 case R_390_PLTOFF32:
2501 /* Relocation is to the entry for this symbol in the
2502 procedure linkage table relative to the start of the GOT. */
2503
2504 /* For local symbols or if we didn't make a PLT entry for
2505 this symbol resolve the symbol directly. */
2506 if ( h == NULL
2507 || h->plt.offset == (bfd_vma) -1
2508 || htab->splt == NULL)
2509 {
2510 relocation -= htab->sgot->output_section->vma;
2511 break;
2512 }
2513
2514 relocation = (htab->splt->output_section->vma
2515 + htab->splt->output_offset
2516 + h->plt.offset
2517 - htab->sgot->output_section->vma);
2518 unresolved_reloc = FALSE;
2519 break;
2520
2521 case R_390_8:
2522 case R_390_16:
2523 case R_390_32:
2524 case R_390_PC16:
2525 case R_390_PC16DBL:
2526 case R_390_PC32DBL:
2527 case R_390_PC32:
2528 if ((input_section->flags & SEC_ALLOC) == 0)
2529 break;
2530
2531 if ((info->shared
2532 && (h == NULL
2533 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2534 || h->root.type != bfd_link_hash_undefweak)
2535 && ((r_type != R_390_PC16
2536 && r_type != R_390_PC16DBL
2537 && r_type != R_390_PC32DBL
2538 && r_type != R_390_PC32)
2539 || !SYMBOL_CALLS_LOCAL (info, h)))
2540 || (ELIMINATE_COPY_RELOCS
2541 && !info->shared
2542 && h != NULL
2543 && h->dynindx != -1
2544 && !h->non_got_ref
2545 && ((h->def_dynamic
2546 && !h->def_regular)
2547 || h->root.type == bfd_link_hash_undefweak
2548 || h->root.type == bfd_link_hash_undefined)))
2549 {
2550 Elf_Internal_Rela outrel;
2551 bfd_boolean skip, relocate;
2552 asection *sreloc;
2553 bfd_byte *loc;
2554
2555 /* When generating a shared object, these relocations
2556 are copied into the output file to be resolved at run
2557 time. */
2558
2559 skip = FALSE;
2560 relocate = FALSE;
2561
2562 outrel.r_offset =
2563 _bfd_elf_section_offset (output_bfd, info, input_section,
2564 rel->r_offset);
2565 if (outrel.r_offset == (bfd_vma) -1)
2566 skip = TRUE;
2567 else if (outrel.r_offset == (bfd_vma) -2)
2568 skip = TRUE, relocate = TRUE;
2569 outrel.r_offset += (input_section->output_section->vma
2570 + input_section->output_offset);
2571
2572 if (skip)
2573 memset (&outrel, 0, sizeof outrel);
2574 else if (h != NULL
2575 && h->dynindx != -1
2576 && (r_type == R_390_PC16
2577 || r_type == R_390_PC16DBL
2578 || r_type == R_390_PC32DBL
2579 || r_type == R_390_PC32
2580 || !info->shared
2581 || !SYMBOLIC_BIND (info, h)
2582 || !h->def_regular))
2583 {
2584 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2585 outrel.r_addend = rel->r_addend;
2586 }
2587 else
2588 {
2589 /* This symbol is local, or marked to become local. */
2590 outrel.r_addend = relocation + rel->r_addend;
2591 if (r_type == R_390_32)
2592 {
2593 relocate = TRUE;
2594 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2595 }
2596 else
2597 {
2598 long sindx;
2599
2600 if (bfd_is_abs_section (sec))
2601 sindx = 0;
2602 else if (sec == NULL || sec->owner == NULL)
2603 {
2604 bfd_set_error(bfd_error_bad_value);
2605 return FALSE;
2606 }
2607 else
2608 {
2609 asection *osec;
2610
2611 osec = sec->output_section;
2612 sindx = elf_section_data (osec)->dynindx;
2613 if (sindx == 0)
2614 {
2615 osec = htab->elf.text_index_section;
2616 sindx = elf_section_data (osec)->dynindx;
2617 }
2618 BFD_ASSERT (sindx != 0);
2619
2620 /* We are turning this relocation into one
2621 against a section symbol, so subtract out
2622 the output section's address but not the
2623 offset of the input section in the output
2624 section. */
2625 outrel.r_addend -= osec->vma;
2626 }
2627 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2628 }
2629 }
2630
2631 sreloc = elf_section_data (input_section)->sreloc;
2632 if (sreloc == NULL)
2633 abort ();
2634
2635 loc = sreloc->contents;
2636 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2637 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2638
2639 /* If this reloc is against an external symbol, we do
2640 not want to fiddle with the addend. Otherwise, we
2641 need to include the symbol value so that it becomes
2642 an addend for the dynamic reloc. */
2643 if (! relocate)
2644 continue;
2645 }
2646 break;
2647
2648 /* Relocations for tls literal pool entries. */
2649 case R_390_TLS_IE32:
2650 if (info->shared)
2651 {
2652 Elf_Internal_Rela outrel;
2653 asection *sreloc;
2654 bfd_byte *loc;
2655
2656 outrel.r_offset = rel->r_offset
2657 + input_section->output_section->vma
2658 + input_section->output_offset;
2659 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2660 sreloc = elf_section_data (input_section)->sreloc;
2661 if (sreloc == NULL)
2662 abort ();
2663 loc = sreloc->contents;
2664 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2665 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2666 }
2667 /* Fall through. */
2668
2669 case R_390_TLS_GD32:
2670 case R_390_TLS_GOTIE32:
2671 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2672 tls_type = GOT_UNKNOWN;
2673 if (h == NULL && local_got_offsets)
2674 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2675 else if (h != NULL)
2676 {
2677 tls_type = elf_s390_hash_entry(h)->tls_type;
2678 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2679 r_type = R_390_TLS_LE32;
2680 }
2681 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2682 r_type = R_390_TLS_IE32;
2683
2684 if (r_type == R_390_TLS_LE32)
2685 {
2686 /* This relocation gets optimized away by the local exec
2687 access optimization. */
2688 BFD_ASSERT (! unresolved_reloc);
2689 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2690 contents + rel->r_offset);
2691 continue;
2692 }
2693
2694 if (htab->sgot == NULL)
2695 abort ();
2696
2697 if (h != NULL)
2698 off = h->got.offset;
2699 else
2700 {
2701 if (local_got_offsets == NULL)
2702 abort ();
2703
2704 off = local_got_offsets[r_symndx];
2705 }
2706
2707 emit_tls_relocs:
2708
2709 if ((off & 1) != 0)
2710 off &= ~1;
2711 else
2712 {
2713 Elf_Internal_Rela outrel;
2714 bfd_byte *loc;
2715 int dr_type, indx;
2716
2717 if (htab->srelgot == NULL)
2718 abort ();
2719
2720 outrel.r_offset = (htab->sgot->output_section->vma
2721 + htab->sgot->output_offset + off);
2722
2723 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2724 if (r_type == R_390_TLS_GD32)
2725 dr_type = R_390_TLS_DTPMOD;
2726 else
2727 dr_type = R_390_TLS_TPOFF;
2728 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2729 outrel.r_addend = relocation - dtpoff_base (info);
2730 else
2731 outrel.r_addend = 0;
2732 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2733 loc = htab->srelgot->contents;
2734 loc += htab->srelgot->reloc_count++
2735 * sizeof (Elf32_External_Rela);
2736 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2737
2738 if (r_type == R_390_TLS_GD32)
2739 {
2740 if (indx == 0)
2741 {
2742 BFD_ASSERT (! unresolved_reloc);
2743 bfd_put_32 (output_bfd,
2744 relocation - dtpoff_base (info),
2745 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2746 }
2747 else
2748 {
2749 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2750 outrel.r_offset += GOT_ENTRY_SIZE;
2751 outrel.r_addend = 0;
2752 htab->srelgot->reloc_count++;
2753 loc += sizeof (Elf32_External_Rela);
2754 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2755 }
2756 }
2757
2758 if (h != NULL)
2759 h->got.offset |= 1;
2760 else
2761 local_got_offsets[r_symndx] |= 1;
2762 }
2763
2764 if (off >= (bfd_vma) -2)
2765 abort ();
2766 if (r_type == ELF32_R_TYPE (rel->r_info))
2767 {
2768 relocation = htab->sgot->output_offset + off;
2769 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2770 relocation += htab->sgot->output_section->vma;
2771 unresolved_reloc = FALSE;
2772 }
2773 else
2774 {
2775 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2776 contents + rel->r_offset);
2777 continue;
2778 }
2779 break;
2780
2781 case R_390_TLS_GOTIE12:
2782 case R_390_TLS_GOTIE20:
2783 case R_390_TLS_IEENT:
2784 if (h == NULL)
2785 {
2786 if (local_got_offsets == NULL)
2787 abort();
2788 off = local_got_offsets[r_symndx];
2789 if (info->shared)
2790 goto emit_tls_relocs;
2791 }
2792 else
2793 {
2794 off = h->got.offset;
2795 tls_type = elf_s390_hash_entry(h)->tls_type;
2796 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2797 goto emit_tls_relocs;
2798 }
2799
2800 if (htab->sgot == NULL)
2801 abort ();
2802
2803 BFD_ASSERT (! unresolved_reloc);
2804 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2805 htab->sgot->contents + off);
2806 relocation = htab->sgot->output_offset + off;
2807 if (r_type == R_390_TLS_IEENT)
2808 relocation += htab->sgot->output_section->vma;
2809 unresolved_reloc = FALSE;
2810 break;
2811
2812 case R_390_TLS_LDM32:
2813 if (! info->shared)
2814 /* The literal pool entry this relocation refers to gets ignored
2815 by the optimized code of the local exec model. Do nothing
2816 and the value will turn out zero. */
2817 continue;
2818
2819 if (htab->sgot == NULL)
2820 abort ();
2821
2822 off = htab->tls_ldm_got.offset;
2823 if (off & 1)
2824 off &= ~1;
2825 else
2826 {
2827 Elf_Internal_Rela outrel;
2828 bfd_byte *loc;
2829
2830 if (htab->srelgot == NULL)
2831 abort ();
2832
2833 outrel.r_offset = (htab->sgot->output_section->vma
2834 + htab->sgot->output_offset + off);
2835
2836 bfd_put_32 (output_bfd, 0,
2837 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2838 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2839 outrel.r_addend = 0;
2840 loc = htab->srelgot->contents;
2841 loc += htab->srelgot->reloc_count++
2842 * sizeof (Elf32_External_Rela);
2843 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2844 htab->tls_ldm_got.offset |= 1;
2845 }
2846 relocation = htab->sgot->output_offset + off;
2847 unresolved_reloc = FALSE;
2848 break;
2849
2850 case R_390_TLS_LE32:
2851 if (info->shared)
2852 {
2853 /* Linking a shared library with non-fpic code requires
2854 a R_390_TLS_TPOFF relocation. */
2855 Elf_Internal_Rela outrel;
2856 asection *sreloc;
2857 bfd_byte *loc;
2858 int indx;
2859
2860 outrel.r_offset = rel->r_offset
2861 + input_section->output_section->vma
2862 + input_section->output_offset;
2863 if (h != NULL && h->dynindx != -1)
2864 indx = h->dynindx;
2865 else
2866 indx = 0;
2867 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2868 if (indx == 0)
2869 outrel.r_addend = relocation - dtpoff_base (info);
2870 else
2871 outrel.r_addend = 0;
2872 sreloc = elf_section_data (input_section)->sreloc;
2873 if (sreloc == NULL)
2874 abort ();
2875 loc = sreloc->contents;
2876 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2877 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2878 }
2879 else
2880 {
2881 BFD_ASSERT (! unresolved_reloc);
2882 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2883 contents + rel->r_offset);
2884 }
2885 continue;
2886
2887 case R_390_TLS_LDO32:
2888 if (info->shared || (input_section->flags & SEC_DEBUGGING))
2889 relocation -= dtpoff_base (info);
2890 else
2891 /* When converting LDO to LE, we must negate. */
2892 relocation = -tpoff (info, relocation);
2893 break;
2894
2895 /* Relocations for tls instructions. */
2896 case R_390_TLS_LOAD:
2897 case R_390_TLS_GDCALL:
2898 case R_390_TLS_LDCALL:
2899 tls_type = GOT_UNKNOWN;
2900 if (h == NULL && local_got_offsets)
2901 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2902 else if (h != NULL)
2903 tls_type = elf_s390_hash_entry(h)->tls_type;
2904
2905 if (tls_type == GOT_TLS_GD)
2906 continue;
2907
2908 if (r_type == R_390_TLS_LOAD)
2909 {
2910 if (!info->shared && (h == NULL || h->dynindx == -1))
2911 {
2912 /* IE->LE transition. Four valid cases:
2913 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2914 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2915 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2916 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2917 unsigned int insn, ry;
2918
2919 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2920 ry = 0;
2921 if ((insn & 0xff00f000) == 0x58000000)
2922 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2923 ry = (insn & 0x000f0000);
2924 else if ((insn & 0xff0f0000) == 0x58000000)
2925 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2926 ry = (insn & 0x0000f000) << 4;
2927 else if ((insn & 0xff00f000) == 0x5800c000)
2928 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2929 ry = (insn & 0x000f0000);
2930 else if ((insn & 0xff0f0000) == 0x580c0000)
2931 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2932 ry = (insn & 0x0000f000) << 4;
2933 else
2934 invalid_tls_insn (input_bfd, input_section, rel);
2935 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2936 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2937 }
2938 }
2939 else if (r_type == R_390_TLS_GDCALL)
2940 {
2941 unsigned int insn;
2942
2943 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2944 if ((insn & 0xff000fff) != 0x4d000000 &&
2945 (insn & 0xffff0000) != 0xc0e50000 &&
2946 (insn & 0xff000000) != 0x0d000000)
2947 invalid_tls_insn (input_bfd, input_section, rel);
2948 if (!info->shared && (h == NULL || h->dynindx == -1))
2949 {
2950 if ((insn & 0xff000000) == 0x0d000000)
2951 {
2952 /* GD->LE transition.
2953 basr rx, ry -> nopr r7 */
2954 insn = 0x07070000 | (insn & 0xffff);
2955 }
2956 else if ((insn & 0xff000000) == 0x4d000000)
2957 {
2958 /* GD->LE transition.
2959 bas %r14,0(%rx,%r13) -> bc 0,0 */
2960 insn = 0x47000000;
2961 }
2962 else
2963 {
2964 /* GD->LE transition.
2965 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
2966 insn = 0xc0040000;
2967 bfd_put_16 (output_bfd, 0x0000,
2968 contents + rel->r_offset + 4);
2969 }
2970 }
2971 else
2972 {
2973 /* If basr is used in the pic case to invoke
2974 _tls_get_offset, something went wrong before. */
2975 if ((insn & 0xff000000) == 0x0d000000)
2976 invalid_tls_insn (input_bfd, input_section, rel);
2977
2978 if ((insn & 0xff000000) == 0x4d000000)
2979 {
2980 /* GD->IE transition.
2981 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2982 insn = 0x5822c000;
2983 }
2984 else
2985 {
2986 /* GD->IE transition.
2987 brasl %r14,__tls_get_addr@plt ->
2988 l %r2,0(%r2,%r12) ; bcr 0,0 */
2989 insn = 0x5822c000;
2990 bfd_put_16 (output_bfd, 0x0700,
2991 contents + rel->r_offset + 4);
2992 }
2993 }
2994 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2995 }
2996 else if (r_type == R_390_TLS_LDCALL)
2997 {
2998 if (!info->shared)
2999 {
3000 unsigned int insn;
3001
3002 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3003 if ((insn & 0xff000fff) != 0x4d000000 &&
3004 (insn & 0xffff0000) != 0xc0e50000 &&
3005 (insn & 0xff000000) != 0x0d000000)
3006 invalid_tls_insn (input_bfd, input_section, rel);
3007
3008 if ((insn & 0xff000000) == 0x0d000000)
3009 {
3010 /* LD->LE transition.
3011 basr rx, ry -> nopr r7 */
3012 insn = 0x07070000 | (insn & 0xffff);
3013 }
3014 else if ((insn & 0xff000000) == 0x4d000000)
3015 {
3016 /* LD->LE transition.
3017 bas %r14,0(%rx,%r13) -> bc 0,0 */
3018 insn = 0x47000000;
3019 }
3020 else
3021 {
3022 /* LD->LE transition.
3023 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3024 insn = 0xc0040000;
3025 bfd_put_16 (output_bfd, 0x0000,
3026 contents + rel->r_offset + 4);
3027 }
3028 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3029 }
3030 }
3031 continue;
3032
3033 default:
3034 break;
3035 }
3036
3037 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3038 because such sections are not SEC_ALLOC and thus ld.so will
3039 not process them. */
3040 if (unresolved_reloc
3041 && !((input_section->flags & SEC_DEBUGGING) != 0
3042 && h->def_dynamic)
3043 && _bfd_elf_section_offset (output_bfd, info, input_section,
3044 rel->r_offset) != (bfd_vma) -1)
3045 (*_bfd_error_handler)
3046 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3047 input_bfd,
3048 input_section,
3049 (long) rel->r_offset,
3050 howto->name,
3051 h->root.root.string);
3052
3053 if (r_type == R_390_20
3054 || r_type == R_390_GOT20
3055 || r_type == R_390_GOTPLT20
3056 || r_type == R_390_TLS_GOTIE20)
3057 {
3058 relocation += rel->r_addend;
3059 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3060 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3061 contents, rel->r_offset,
3062 relocation, 0);
3063 }
3064 else
3065 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3066 contents, rel->r_offset,
3067 relocation, rel->r_addend);
3068
3069 if (r != bfd_reloc_ok)
3070 {
3071 const char *name;
3072
3073 if (h != NULL)
3074 name = h->root.root.string;
3075 else
3076 {
3077 name = bfd_elf_string_from_elf_section (input_bfd,
3078 symtab_hdr->sh_link,
3079 sym->st_name);
3080 if (name == NULL)
3081 return FALSE;
3082 if (*name == '\0')
3083 name = bfd_section_name (input_bfd, sec);
3084 }
3085
3086 if (r == bfd_reloc_overflow)
3087 {
3088
3089 if (! ((*info->callbacks->reloc_overflow)
3090 (info, (h ? &h->root : NULL), name, howto->name,
3091 (bfd_vma) 0, input_bfd, input_section,
3092 rel->r_offset)))
3093 return FALSE;
3094 }
3095 else
3096 {
3097 (*_bfd_error_handler)
3098 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3099 input_bfd, input_section,
3100 (long) rel->r_offset, name, (int) r);
3101 return FALSE;
3102 }
3103 }
3104 }
3105
3106 return TRUE;
3107 }
3108
3109 /* Finish up dynamic symbol handling. We set the contents of various
3110 dynamic sections here. */
3111
3112 static bfd_boolean
3113 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3114 bfd *output_bfd;
3115 struct bfd_link_info *info;
3116 struct elf_link_hash_entry *h;
3117 Elf_Internal_Sym *sym;
3118 {
3119 struct elf_s390_link_hash_table *htab;
3120
3121 htab = elf_s390_hash_table (info);
3122
3123 if (h->plt.offset != (bfd_vma) -1)
3124 {
3125 bfd_vma plt_index;
3126 bfd_vma got_offset;
3127 Elf_Internal_Rela rela;
3128 bfd_byte *loc;
3129 bfd_vma relative_offset;
3130
3131 /* This symbol has an entry in the procedure linkage table. Set
3132 it up. */
3133 if (h->dynindx == -1
3134 || htab->splt == NULL
3135 || htab->sgotplt == NULL
3136 || htab->srelplt == NULL)
3137 abort ();
3138
3139 /* Calc. index no.
3140 Current offset - size first entry / entry size. */
3141 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3142
3143 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3144 addr & GOT addr. */
3145 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3146
3147 /* S390 uses halfwords for relative branch calc! */
3148 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3149 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3150 /* If offset is > 32768, branch to a previous branch
3151 390 can only handle +-64 K jumps. */
3152 if ( -32768 > (int) relative_offset )
3153 relative_offset
3154 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3155
3156 /* Fill in the entry in the procedure linkage table. */
3157 if (!info->shared)
3158 {
3159 memcpy (htab->splt->contents + h->plt.offset, elf_s390_plt_entry,
3160 PLT_ENTRY_SIZE);
3161
3162 /* Adjust jump to the first plt entry. */
3163 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3164 htab->splt->contents + h->plt.offset + 20);
3165
3166 /* Push the GOT offset field. */
3167 bfd_put_32 (output_bfd,
3168 (htab->sgotplt->output_section->vma
3169 + htab->sgotplt->output_offset
3170 + got_offset),
3171 htab->splt->contents + h->plt.offset + 24);
3172 }
3173 else if (got_offset < 4096)
3174 {
3175 /* The GOT offset is small enough to be used directly as
3176 displacement. */
3177 memcpy (htab->splt->contents + h->plt.offset,
3178 elf_s390_plt_pic12_entry,
3179 PLT_ENTRY_SIZE);
3180
3181 /* Put in the GOT offset as displacement value. The 0xc000
3182 value comes from the first word of the plt entry. Look
3183 at the elf_s390_plt_pic16_entry content. */
3184 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3185 htab->splt->contents + h->plt.offset + 2);
3186
3187 /* Adjust the jump to the first plt entry. */
3188 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3189 htab->splt->contents + h->plt.offset + 20);
3190 }
3191 else if (got_offset < 32768)
3192 {
3193 /* The GOT offset is too big for a displacement but small
3194 enough to be a signed 16 bit immediate value as it can be
3195 used in an lhi instruction. */
3196 memcpy (htab->splt->contents + h->plt.offset,
3197 elf_s390_plt_pic16_entry,
3198 PLT_ENTRY_SIZE);
3199
3200 /* Put in the GOT offset for the lhi instruction. */
3201 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3202 htab->splt->contents + h->plt.offset + 2);
3203
3204 /* Adjust the jump to the first plt entry. */
3205 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3206 htab->splt->contents + h->plt.offset + 20);
3207 }
3208 else
3209 {
3210 memcpy (htab->splt->contents + h->plt.offset,
3211 elf_s390_plt_pic_entry,
3212 PLT_ENTRY_SIZE);
3213
3214 /* Adjust the jump to the first plt entry. */
3215 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3216 htab->splt->contents + h->plt.offset + 20);
3217
3218 /* Push the GOT offset field. */
3219 bfd_put_32 (output_bfd, got_offset,
3220 htab->splt->contents + h->plt.offset + 24);
3221 }
3222 /* Insert offset into reloc. table here. */
3223 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3224 htab->splt->contents + h->plt.offset + 28);
3225
3226 /* Fill in the entry in the global offset table.
3227 Points to instruction after GOT offset. */
3228 bfd_put_32 (output_bfd,
3229 (htab->splt->output_section->vma
3230 + htab->splt->output_offset
3231 + h->plt.offset
3232 + 12),
3233 htab->sgotplt->contents + got_offset);
3234
3235 /* Fill in the entry in the .rela.plt section. */
3236 rela.r_offset = (htab->sgotplt->output_section->vma
3237 + htab->sgotplt->output_offset
3238 + got_offset);
3239 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3240 rela.r_addend = 0;
3241 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3242 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3243
3244 if (!h->def_regular)
3245 {
3246 /* Mark the symbol as undefined, rather than as defined in
3247 the .plt section. Leave the value alone. This is a clue
3248 for the dynamic linker, to make function pointer
3249 comparisons work between an application and shared
3250 library. */
3251 sym->st_shndx = SHN_UNDEF;
3252 }
3253 }
3254
3255 if (h->got.offset != (bfd_vma) -1
3256 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3257 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3258 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3259 {
3260 Elf_Internal_Rela rela;
3261 bfd_byte *loc;
3262
3263 /* This symbol has an entry in the global offset table. Set it
3264 up. */
3265
3266 if (htab->sgot == NULL || htab->srelgot == NULL)
3267 abort ();
3268
3269 rela.r_offset = (htab->sgot->output_section->vma
3270 + htab->sgot->output_offset
3271 + (h->got.offset &~ (bfd_vma) 1));
3272
3273 /* If this is a static link, or it is a -Bsymbolic link and the
3274 symbol is defined locally or was forced to be local because
3275 of a version file, we just want to emit a RELATIVE reloc.
3276 The entry in the global offset table will already have been
3277 initialized in the relocate_section function. */
3278 if (info->shared
3279 && SYMBOL_REFERENCES_LOCAL (info, h))
3280 {
3281 if (!h->def_regular)
3282 return FALSE;
3283 BFD_ASSERT((h->got.offset & 1) != 0);
3284 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3285 rela.r_addend = (h->root.u.def.value
3286 + h->root.u.def.section->output_section->vma
3287 + h->root.u.def.section->output_offset);
3288 }
3289 else
3290 {
3291 BFD_ASSERT((h->got.offset & 1) == 0);
3292 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3293 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3294 rela.r_addend = 0;
3295 }
3296
3297 loc = htab->srelgot->contents;
3298 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3299 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3300 }
3301
3302 if (h->needs_copy)
3303 {
3304 Elf_Internal_Rela rela;
3305 bfd_byte *loc;
3306
3307 /* This symbols needs a copy reloc. Set it up. */
3308
3309 if (h->dynindx == -1
3310 || (h->root.type != bfd_link_hash_defined
3311 && h->root.type != bfd_link_hash_defweak)
3312 || htab->srelbss == NULL)
3313 abort ();
3314
3315 rela.r_offset = (h->root.u.def.value
3316 + h->root.u.def.section->output_section->vma
3317 + h->root.u.def.section->output_offset);
3318 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3319 rela.r_addend = 0;
3320 loc = htab->srelbss->contents;
3321 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3322 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3323 }
3324
3325 /* Mark some specially defined symbols as absolute. */
3326 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3327 || h == htab->elf.hgot
3328 || h == htab->elf.hplt)
3329 sym->st_shndx = SHN_ABS;
3330
3331 return TRUE;
3332 }
3333
3334 /* Used to decide how to sort relocs in an optimal manner for the
3335 dynamic linker, before writing them out. */
3336
3337 static enum elf_reloc_type_class
3338 elf_s390_reloc_type_class (rela)
3339 const Elf_Internal_Rela *rela;
3340 {
3341 switch ((int) ELF32_R_TYPE (rela->r_info))
3342 {
3343 case R_390_RELATIVE:
3344 return reloc_class_relative;
3345 case R_390_JMP_SLOT:
3346 return reloc_class_plt;
3347 case R_390_COPY:
3348 return reloc_class_copy;
3349 default:
3350 return reloc_class_normal;
3351 }
3352 }
3353
3354 /* Finish up the dynamic sections. */
3355
3356 static bfd_boolean
3357 elf_s390_finish_dynamic_sections (output_bfd, info)
3358 bfd *output_bfd;
3359 struct bfd_link_info *info;
3360 {
3361 struct elf_s390_link_hash_table *htab;
3362 bfd *dynobj;
3363 asection *sdyn;
3364
3365 htab = elf_s390_hash_table (info);
3366 dynobj = htab->elf.dynobj;
3367 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3368
3369 if (htab->elf.dynamic_sections_created)
3370 {
3371 Elf32_External_Dyn *dyncon, *dynconend;
3372
3373 if (sdyn == NULL || htab->sgot == NULL)
3374 abort ();
3375
3376 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3377 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3378 for (; dyncon < dynconend; dyncon++)
3379 {
3380 Elf_Internal_Dyn dyn;
3381 asection *s;
3382
3383 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3384
3385 switch (dyn.d_tag)
3386 {
3387 default:
3388 continue;
3389
3390 case DT_PLTGOT:
3391 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3392 break;
3393
3394 case DT_JMPREL:
3395 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3396 break;
3397
3398 case DT_PLTRELSZ:
3399 s = htab->srelplt->output_section;
3400 dyn.d_un.d_val = s->size;
3401 break;
3402 }
3403
3404 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3405 }
3406
3407 /* Fill in the special first entry in the procedure linkage table. */
3408 if (htab->splt && htab->splt->size > 0)
3409 {
3410 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3411 if (info->shared)
3412 {
3413 memcpy (htab->splt->contents, elf_s390_plt_pic_first_entry,
3414 PLT_FIRST_ENTRY_SIZE);
3415 }
3416 else
3417 {
3418 memcpy (htab->splt->contents, elf_s390_plt_first_entry,
3419 PLT_FIRST_ENTRY_SIZE);
3420 bfd_put_32 (output_bfd,
3421 htab->sgotplt->output_section->vma
3422 + htab->sgotplt->output_offset,
3423 htab->splt->contents + 24);
3424 }
3425 elf_section_data (htab->splt->output_section)
3426 ->this_hdr.sh_entsize = 4;
3427 }
3428
3429 }
3430
3431 if (htab->sgotplt)
3432 {
3433 /* Fill in the first three entries in the global offset table. */
3434 if (htab->sgotplt->size > 0)
3435 {
3436 bfd_put_32 (output_bfd,
3437 (sdyn == NULL ? (bfd_vma) 0
3438 : sdyn->output_section->vma + sdyn->output_offset),
3439 htab->sgotplt->contents);
3440 /* One entry for shared object struct ptr. */
3441 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3442 /* One entry for _dl_runtime_resolve. */
3443 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3444 }
3445
3446 elf_section_data (htab->sgotplt->output_section)
3447 ->this_hdr.sh_entsize = 4;
3448 }
3449 return TRUE;
3450 }
3451
3452 static bfd_boolean
3453 elf_s390_grok_prstatus (abfd, note)
3454 bfd * abfd;
3455 Elf_Internal_Note * note;
3456 {
3457 int offset;
3458 unsigned int size;
3459
3460 switch (note->descsz)
3461 {
3462 default:
3463 return FALSE;
3464
3465 case 224: /* S/390 Linux. */
3466 /* pr_cursig */
3467 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3468
3469 /* pr_pid */
3470 elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24);
3471
3472 /* pr_reg */
3473 offset = 72;
3474 size = 144;
3475 break;
3476 }
3477
3478 /* Make a ".reg/999" section. */
3479 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3480 size, note->descpos + offset);
3481 }
3482
3483 /* Return address for Ith PLT stub in section PLT, for relocation REL
3484 or (bfd_vma) -1 if it should not be included. */
3485
3486 static bfd_vma
3487 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3488 const arelent *rel ATTRIBUTE_UNUSED)
3489 {
3490 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3491 }
3492
3493 static bfd_boolean
3494 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3495 {
3496 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3497 return TRUE;
3498 }
3499
3500
3501 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3502 #define TARGET_BIG_NAME "elf32-s390"
3503 #define ELF_ARCH bfd_arch_s390
3504 #define ELF_TARGET_ID S390_ELF_DATA
3505 #define ELF_MACHINE_CODE EM_S390
3506 #define ELF_MACHINE_ALT1 EM_S390_OLD
3507 #define ELF_MAXPAGESIZE 0x1000
3508
3509 #define elf_backend_can_gc_sections 1
3510 #define elf_backend_can_refcount 1
3511 #define elf_backend_want_got_plt 1
3512 #define elf_backend_plt_readonly 1
3513 #define elf_backend_want_plt_sym 0
3514 #define elf_backend_got_header_size 12
3515 #define elf_backend_rela_normal 1
3516
3517 #define elf_info_to_howto elf_s390_info_to_howto
3518
3519 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3520 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3521 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3522 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3523
3524 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
3525
3526 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3527 #define elf_backend_check_relocs elf_s390_check_relocs
3528 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3529 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3530 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3531 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3532 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3533 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3534 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3535 #define elf_backend_relocate_section elf_s390_relocate_section
3536 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3537 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3538 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3539 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3540 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3541
3542 #define bfd_elf32_mkobject elf_s390_mkobject
3543 #define elf_backend_object_p elf_s390_object_p
3544
3545 #include "elf32-target.h"
GDB Binutils - Deliverables
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