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