1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "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 *
elf_s390_reloc_type_lookup(abfd,code)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 *
elf_s390_reloc_name_lookup(bfd * abfd ATTRIBUTE_UNUSED,const char * r_name)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
elf_s390_info_to_howto(abfd,cache_ptr,dst)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
s390_tls_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)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
s390_elf_ldisp_reloc(abfd,reloc_entry,symbol,data,input_section,output_bfd,error_message)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
elf_s390_is_local_label_name(abfd,name)458 elf_s390_is_local_label_name (abfd, name)
459 bfd *abfd;
460 const char *name;
461 {
462 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
463 return TRUE;
464
465 return _bfd_elf_is_local_label_name (abfd, name);
466 }
467
468 /* Functions for the 390 ELF linker. */
469
470 /* The name of the dynamic interpreter. This is put in the .interp
471 section. */
472
473 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
474
475 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
476 copying dynamic variables from a shared lib into an app's dynbss
477 section, and instead use a dynamic relocation to point into the
478 shared lib. */
479 #define ELIMINATE_COPY_RELOCS 1
480
481 /* The size in bytes of the first entry in the procedure linkage table. */
482 #define PLT_FIRST_ENTRY_SIZE 32
483 /* The size in bytes of an entry in the procedure linkage table. */
484 #define PLT_ENTRY_SIZE 32
485
486 #define GOT_ENTRY_SIZE 4
487
488 /* The first three entries in a procedure linkage table are reserved,
489 and the initial contents are unimportant (we zero them out).
490 Subsequent entries look like this. See the SVR4 ABI 386
491 supplement to see how this works. */
492
493 /* For the s390, simple addr offset can only be 0 - 4096.
494 To use the full 2 GB address space, several instructions
495 are needed to load an address in a register and execute
496 a branch( or just saving the address)
497
498 Furthermore, only r 0 and 1 are free to use!!! */
499
500 /* The first 3 words in the GOT are then reserved.
501 Word 0 is the address of the dynamic table.
502 Word 1 is a pointer to a structure describing the object
503 Word 2 is used to point to the loader entry address.
504
505 The code for position independent PLT entries looks like this:
506
507 r12 holds addr of the current GOT at entry to the PLT
508
509 The GOT holds the address in the PLT to be executed.
510 The loader then gets:
511 24(15) = Pointer to the structure describing the object.
512 28(15) = Offset in symbol table
513
514 The loader must then find the module where the function is
515 and insert the address in the GOT.
516
517 Note: 390 can only address +- 64 K relative.
518 We check if offset > 65536, then make a relative branch -64xxx
519 back to a previous defined branch
520
521 PLT1: BASR 1,0 # 2 bytes
522 L 1,22(1) # 4 bytes Load offset in GOT in r 1
523 L 1,(1,12) # 4 bytes Load address from GOT in r1
524 BCR 15,1 # 2 bytes Jump to address
525 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
526 L 1,14(1) # 4 bytes Load offset in symol table in r1
527 BRC 15,-x # 4 bytes Jump to start of PLT
528 .word 0 # 2 bytes filler
529 .long ? # 4 bytes offset in GOT
530 .long ? # 4 bytes offset into symbol table
531
532 This was the general case. There are two additional, optimizes PLT
533 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
534 First the one for GOT offsets < 4096:
535
536 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
537 BCR 15,1 # 2 bytes Jump to address
538 .word 0,0,0 # 6 bytes filler
539 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
540 L 1,14(1) # 4 bytes Load offset in symbol table in r1
541 BRC 15,-x # 4 bytes Jump to start of PLT
542 .word 0,0,0 # 6 bytes filler
543 .long ? # 4 bytes offset into symbol table
544
545 Second the one for GOT offsets < 32768:
546
547 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
548 L 1,(1,12) # 4 bytes Load address from GOT to r1
549 BCR 15,1 # 2 bytes Jump to address
550 .word 0 # 2 bytes filler
551 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
552 L 1,14(1) # 4 bytes Load offset in symbol table in r1
553 BRC 15,-x # 4 bytes Jump to start of PLT
554 .word 0,0,0 # 6 bytes filler
555 .long ? # 4 bytes offset into symbol table
556
557 Total = 32 bytes per PLT entry
558
559 The code for static build PLT entries looks like this:
560
561 PLT1: BASR 1,0 # 2 bytes
562 L 1,22(1) # 4 bytes Load address of GOT entry
563 L 1,0(0,1) # 4 bytes Load address from GOT in r1
564 BCR 15,1 # 2 bytes Jump to address
565 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
566 L 1,14(1) # 4 bytes Load offset in symbol table in r1
567 BRC 15,-x # 4 bytes Jump to start of PLT
568 .word 0 # 2 bytes filler
569 .long ? # 4 bytes address of GOT entry
570 .long ? # 4 bytes offset into symbol table */
571
572 #define PLT_PIC_ENTRY_WORD0 0x0d105810
573 #define PLT_PIC_ENTRY_WORD1 0x10165811
574 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
575 #define PLT_PIC_ENTRY_WORD3 0x0d105810
576 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
577
578 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
579 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
580 #define PLT_PIC12_ENTRY_WORD2 0x00000000
581 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
582 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
583
584 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
585 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
586 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
587 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
588 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
589
590 #define PLT_ENTRY_WORD0 0x0d105810
591 #define PLT_ENTRY_WORD1 0x10165810
592 #define PLT_ENTRY_WORD2 0x100007f1
593 #define PLT_ENTRY_WORD3 0x0d105810
594 #define PLT_ENTRY_WORD4 0x100ea7f4
595
596 /* The first PLT entry pushes the offset into the symbol table
597 from R1 onto the stack at 8(15) and the loader object info
598 at 12(15), loads the loader address in R1 and jumps to it. */
599
600 /* The first entry in the PLT for PIC code:
601
602 PLT0:
603 ST 1,28(15) # R1 has offset into symbol table
604 L 1,4(12) # Get loader ino(object struct address)
605 ST 1,24(15) # Store address
606 L 1,8(12) # Entry address of loader in R1
607 BR 1 # Jump to loader
608
609 The first entry in the PLT for static code:
610
611 PLT0:
612 ST 1,28(15) # R1 has offset into symbol table
613 BASR 1,0
614 L 1,18(0,1) # Get address of GOT
615 MVC 24(4,15),4(1) # Move loader ino to stack
616 L 1,8(1) # Get address of loader
617 BR 1 # Jump to loader
618 .word 0 # filler
619 .long got # address of GOT */
620
621 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
622 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
623 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
624 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
625 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
626
627 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
628 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
629 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
630 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
631 #define PLT_FIRST_ENTRY_WORD4 0x58101008
632 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
633
634 /* The s390 linker needs to keep track of the number of relocs that it
635 decides to copy as dynamic relocs in check_relocs for each symbol.
636 This is so that it can later discard them if they are found to be
637 unnecessary. We store the information in a field extending the
638 regular ELF linker hash table. */
639
640 struct elf_s390_dyn_relocs
641 {
642 struct elf_s390_dyn_relocs *next;
643
644 /* The input section of the reloc. */
645 asection *sec;
646
647 /* Total number of relocs copied for the input section. */
648 bfd_size_type count;
649
650 /* Number of pc-relative relocs copied for the input section. */
651 bfd_size_type pc_count;
652 };
653
654 /* s390 ELF linker hash entry. */
655
656 struct elf_s390_link_hash_entry
657 {
658 struct elf_link_hash_entry elf;
659
660 /* Track dynamic relocs copied for this symbol. */
661 struct elf_s390_dyn_relocs *dyn_relocs;
662
663 /* Number of GOTPLT references for a function. */
664 bfd_signed_vma gotplt_refcount;
665
666 #define GOT_UNKNOWN 0
667 #define GOT_NORMAL 1
668 #define GOT_TLS_GD 2
669 #define GOT_TLS_IE 3
670 #define GOT_TLS_IE_NLT 4
671 unsigned char tls_type;
672 };
673
674 #define elf_s390_hash_entry(ent) \
675 ((struct elf_s390_link_hash_entry *)(ent))
676
677 struct elf_s390_obj_tdata
678 {
679 struct elf_obj_tdata root;
680
681 /* tls_type for each local got entry. */
682 char *local_got_tls_type;
683 };
684
685 #define elf_s390_tdata(abfd) \
686 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
687
688 #define elf_s390_local_got_tls_type(abfd) \
689 (elf_s390_tdata (abfd)->local_got_tls_type)
690
691 static bfd_boolean
elf_s390_mkobject(bfd * abfd)692 elf_s390_mkobject (bfd *abfd)
693 {
694 if (abfd->tdata.any == NULL)
695 {
696 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
697 abfd->tdata.any = bfd_zalloc (abfd, amt);
698 if (abfd->tdata.any == NULL)
699 return FALSE;
700 }
701 return bfd_elf_mkobject (abfd);
702 }
703
704 static bfd_boolean
elf_s390_object_p(abfd)705 elf_s390_object_p (abfd)
706 bfd *abfd;
707 {
708 /* Set the right machine number for an s390 elf32 file. */
709 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
710 }
711
712 /* s390 ELF linker hash table. */
713
714 struct elf_s390_link_hash_table
715 {
716 struct elf_link_hash_table elf;
717
718 /* Short-cuts to get to dynamic linker sections. */
719 asection *sgot;
720 asection *sgotplt;
721 asection *srelgot;
722 asection *splt;
723 asection *srelplt;
724 asection *sdynbss;
725 asection *srelbss;
726
727 union {
728 bfd_signed_vma refcount;
729 bfd_vma offset;
730 } tls_ldm_got;
731
732 /* Small local sym to section mapping cache. */
733 struct sym_sec_cache sym_sec;
734 };
735
736 /* Get the s390 ELF linker hash table from a link_info structure. */
737
738 #define elf_s390_hash_table(p) \
739 ((struct elf_s390_link_hash_table *) ((p)->hash))
740
741 /* Create an entry in an s390 ELF linker hash table. */
742
743 static struct bfd_hash_entry *
link_hash_newfunc(entry,table,string)744 link_hash_newfunc (entry, table, string)
745 struct bfd_hash_entry *entry;
746 struct bfd_hash_table *table;
747 const char *string;
748 {
749 /* Allocate the structure if it has not already been allocated by a
750 subclass. */
751 if (entry == NULL)
752 {
753 entry = bfd_hash_allocate (table,
754 sizeof (struct elf_s390_link_hash_entry));
755 if (entry == NULL)
756 return entry;
757 }
758
759 /* Call the allocation method of the superclass. */
760 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
761 if (entry != NULL)
762 {
763 struct elf_s390_link_hash_entry *eh;
764
765 eh = (struct elf_s390_link_hash_entry *) entry;
766 eh->dyn_relocs = NULL;
767 eh->gotplt_refcount = 0;
768 eh->tls_type = GOT_UNKNOWN;
769 }
770
771 return entry;
772 }
773
774 /* Create an s390 ELF linker hash table. */
775
776 static struct bfd_link_hash_table *
elf_s390_link_hash_table_create(abfd)777 elf_s390_link_hash_table_create (abfd)
778 bfd *abfd;
779 {
780 struct elf_s390_link_hash_table *ret;
781 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
782
783 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
784 if (ret == NULL)
785 return NULL;
786
787 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
788 sizeof (struct elf_s390_link_hash_entry)))
789 {
790 free (ret);
791 return NULL;
792 }
793
794 ret->sgot = NULL;
795 ret->sgotplt = NULL;
796 ret->srelgot = NULL;
797 ret->splt = NULL;
798 ret->srelplt = NULL;
799 ret->sdynbss = NULL;
800 ret->srelbss = NULL;
801 ret->tls_ldm_got.refcount = 0;
802 ret->sym_sec.abfd = NULL;
803
804 return &ret->elf.root;
805 }
806
807 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
808 shortcuts to them in our hash table. */
809
810 static bfd_boolean
create_got_section(dynobj,info)811 create_got_section (dynobj, info)
812 bfd *dynobj;
813 struct bfd_link_info *info;
814 {
815 struct elf_s390_link_hash_table *htab;
816
817 if (! _bfd_elf_create_got_section (dynobj, info))
818 return FALSE;
819
820 htab = elf_s390_hash_table (info);
821 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
822 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
823 if (!htab->sgot || !htab->sgotplt)
824 abort ();
825
826 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
827 (SEC_ALLOC | SEC_LOAD
828 | SEC_HAS_CONTENTS
829 | SEC_IN_MEMORY
830 | SEC_LINKER_CREATED
831 | SEC_READONLY));
832 if (htab->srelgot == NULL
833 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
834 return FALSE;
835 return TRUE;
836 }
837
838 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
839 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
840 hash table. */
841
842 static bfd_boolean
elf_s390_create_dynamic_sections(dynobj,info)843 elf_s390_create_dynamic_sections (dynobj, info)
844 bfd *dynobj;
845 struct bfd_link_info *info;
846 {
847 struct elf_s390_link_hash_table *htab;
848
849 htab = elf_s390_hash_table (info);
850 if (!htab->sgot && !create_got_section (dynobj, info))
851 return FALSE;
852
853 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
854 return FALSE;
855
856 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
857 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
858 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
859 if (!info->shared)
860 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
861
862 if (!htab->splt || !htab->srelplt || !htab->sdynbss
863 || (!info->shared && !htab->srelbss))
864 abort ();
865
866 return TRUE;
867 }
868
869 /* Copy the extra info we tack onto an elf_link_hash_entry. */
870
871 static void
elf_s390_copy_indirect_symbol(info,dir,ind)872 elf_s390_copy_indirect_symbol (info, dir, ind)
873 struct bfd_link_info *info;
874 struct elf_link_hash_entry *dir, *ind;
875 {
876 struct elf_s390_link_hash_entry *edir, *eind;
877
878 edir = (struct elf_s390_link_hash_entry *) dir;
879 eind = (struct elf_s390_link_hash_entry *) ind;
880
881 if (eind->dyn_relocs != NULL)
882 {
883 if (edir->dyn_relocs != NULL)
884 {
885 struct elf_s390_dyn_relocs **pp;
886 struct elf_s390_dyn_relocs *p;
887
888 /* Add reloc counts against the indirect sym to the direct sym
889 list. Merge any entries against the same section. */
890 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
891 {
892 struct elf_s390_dyn_relocs *q;
893
894 for (q = edir->dyn_relocs; q != NULL; q = q->next)
895 if (q->sec == p->sec)
896 {
897 q->pc_count += p->pc_count;
898 q->count += p->count;
899 *pp = p->next;
900 break;
901 }
902 if (q == NULL)
903 pp = &p->next;
904 }
905 *pp = edir->dyn_relocs;
906 }
907
908 edir->dyn_relocs = eind->dyn_relocs;
909 eind->dyn_relocs = NULL;
910 }
911
912 if (ind->root.type == bfd_link_hash_indirect
913 && dir->got.refcount <= 0)
914 {
915 edir->tls_type = eind->tls_type;
916 eind->tls_type = GOT_UNKNOWN;
917 }
918
919 if (ELIMINATE_COPY_RELOCS
920 && ind->root.type != bfd_link_hash_indirect
921 && dir->dynamic_adjusted)
922 {
923 /* If called to transfer flags for a weakdef during processing
924 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
925 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
926 dir->ref_dynamic |= ind->ref_dynamic;
927 dir->ref_regular |= ind->ref_regular;
928 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
929 dir->needs_plt |= ind->needs_plt;
930 }
931 else
932 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
933 }
934
935 static int
elf_s390_tls_transition(info,r_type,is_local)936 elf_s390_tls_transition (info, r_type, is_local)
937 struct bfd_link_info *info;
938 int r_type;
939 int is_local;
940 {
941 if (info->shared)
942 return r_type;
943
944 switch (r_type)
945 {
946 case R_390_TLS_GD32:
947 case R_390_TLS_IE32:
948 if (is_local)
949 return R_390_TLS_LE32;
950 return R_390_TLS_IE32;
951 case R_390_TLS_GOTIE32:
952 if (is_local)
953 return R_390_TLS_LE32;
954 return R_390_TLS_GOTIE32;
955 case R_390_TLS_LDM32:
956 return R_390_TLS_LE32;
957 }
958
959 return r_type;
960 }
961
962 /* Look through the relocs for a section during the first phase, and
963 allocate space in the global offset table or procedure linkage
964 table. */
965
966 static bfd_boolean
elf_s390_check_relocs(abfd,info,sec,relocs)967 elf_s390_check_relocs (abfd, info, sec, relocs)
968 bfd *abfd;
969 struct bfd_link_info *info;
970 asection *sec;
971 const Elf_Internal_Rela *relocs;
972 {
973 struct elf_s390_link_hash_table *htab;
974 Elf_Internal_Shdr *symtab_hdr;
975 struct elf_link_hash_entry **sym_hashes;
976 const Elf_Internal_Rela *rel;
977 const Elf_Internal_Rela *rel_end;
978 asection *sreloc;
979 bfd_signed_vma *local_got_refcounts;
980 int tls_type, old_tls_type;
981
982 if (info->relocatable)
983 return TRUE;
984
985 htab = elf_s390_hash_table (info);
986 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
987 sym_hashes = elf_sym_hashes (abfd);
988 local_got_refcounts = elf_local_got_refcounts (abfd);
989
990 sreloc = NULL;
991
992 rel_end = relocs + sec->reloc_count;
993 for (rel = relocs; rel < rel_end; rel++)
994 {
995 unsigned int r_type;
996 unsigned long r_symndx;
997 struct elf_link_hash_entry *h;
998
999 r_symndx = ELF32_R_SYM (rel->r_info);
1000
1001 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
1002 {
1003 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
1004 abfd, r_symndx);
1005 return FALSE;
1006 }
1007
1008 if (r_symndx < symtab_hdr->sh_info)
1009 h = NULL;
1010 else
1011 {
1012 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1013 while (h->root.type == bfd_link_hash_indirect
1014 || h->root.type == bfd_link_hash_warning)
1015 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1016 }
1017
1018 /* Create got section and local_got_refcounts array if they
1019 are needed. */
1020 r_type = elf_s390_tls_transition (info,
1021 ELF32_R_TYPE (rel->r_info),
1022 h == NULL);
1023 switch (r_type)
1024 {
1025 case R_390_GOT12:
1026 case R_390_GOT16:
1027 case R_390_GOT20:
1028 case R_390_GOT32:
1029 case R_390_GOTENT:
1030 case R_390_GOTPLT12:
1031 case R_390_GOTPLT16:
1032 case R_390_GOTPLT20:
1033 case R_390_GOTPLT32:
1034 case R_390_GOTPLTENT:
1035 case R_390_TLS_GD32:
1036 case R_390_TLS_GOTIE12:
1037 case R_390_TLS_GOTIE20:
1038 case R_390_TLS_GOTIE32:
1039 case R_390_TLS_IEENT:
1040 case R_390_TLS_IE32:
1041 case R_390_TLS_LDM32:
1042 if (h == NULL
1043 && local_got_refcounts == NULL)
1044 {
1045 bfd_size_type size;
1046
1047 size = symtab_hdr->sh_info;
1048 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1049 local_got_refcounts = ((bfd_signed_vma *)
1050 bfd_zalloc (abfd, size));
1051 if (local_got_refcounts == NULL)
1052 return FALSE;
1053 elf_local_got_refcounts (abfd) = local_got_refcounts;
1054 elf_s390_local_got_tls_type (abfd)
1055 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1056 }
1057 /* Fall through. */
1058 case R_390_GOTOFF16:
1059 case R_390_GOTOFF32:
1060 case R_390_GOTPC:
1061 case R_390_GOTPCDBL:
1062 if (htab->sgot == NULL)
1063 {
1064 if (htab->elf.dynobj == NULL)
1065 htab->elf.dynobj = abfd;
1066 if (!create_got_section (htab->elf.dynobj, info))
1067 return FALSE;
1068 }
1069 }
1070
1071 switch (r_type)
1072 {
1073 case R_390_GOTOFF16:
1074 case R_390_GOTOFF32:
1075 case R_390_GOTPC:
1076 case R_390_GOTPCDBL:
1077 /* Got is created, nothing to be done. */
1078 break;
1079
1080 case R_390_PLT16DBL:
1081 case R_390_PLT32DBL:
1082 case R_390_PLT32:
1083 case R_390_PLTOFF16:
1084 case R_390_PLTOFF32:
1085 /* This symbol requires a procedure linkage table entry. We
1086 actually build the entry in adjust_dynamic_symbol,
1087 because this might be a case of linking PIC code which is
1088 never referenced by a dynamic object, in which case we
1089 don't need to generate a procedure linkage table entry
1090 after all. */
1091
1092 /* If this is a local symbol, we resolve it directly without
1093 creating a procedure linkage table entry. */
1094 if (h != NULL)
1095 {
1096 h->needs_plt = 1;
1097 h->plt.refcount += 1;
1098 }
1099 break;
1100
1101 case R_390_GOTPLT12:
1102 case R_390_GOTPLT16:
1103 case R_390_GOTPLT20:
1104 case R_390_GOTPLT32:
1105 case R_390_GOTPLTENT:
1106 /* This symbol requires either a procedure linkage table entry
1107 or an entry in the local got. We actually build the entry
1108 in adjust_dynamic_symbol because whether this is really a
1109 global reference can change and with it the fact if we have
1110 to create a plt entry or a local got entry. To be able to
1111 make a once global symbol a local one we have to keep track
1112 of the number of gotplt references that exist for this
1113 symbol. */
1114 if (h != NULL)
1115 {
1116 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1117 h->needs_plt = 1;
1118 h->plt.refcount += 1;
1119 }
1120 else
1121 local_got_refcounts[r_symndx] += 1;
1122 break;
1123
1124 case R_390_TLS_LDM32:
1125 htab->tls_ldm_got.refcount += 1;
1126 break;
1127
1128 case R_390_TLS_IE32:
1129 case R_390_TLS_GOTIE12:
1130 case R_390_TLS_GOTIE20:
1131 case R_390_TLS_GOTIE32:
1132 case R_390_TLS_IEENT:
1133 if (info->shared)
1134 info->flags |= DF_STATIC_TLS;
1135 /* Fall through. */
1136
1137 case R_390_GOT12:
1138 case R_390_GOT16:
1139 case R_390_GOT20:
1140 case R_390_GOT32:
1141 case R_390_GOTENT:
1142 case R_390_TLS_GD32:
1143 /* This symbol requires a global offset table entry. */
1144 switch (r_type)
1145 {
1146 default:
1147 case R_390_GOT12:
1148 case R_390_GOT16:
1149 case R_390_GOT20:
1150 case R_390_GOT32:
1151 case R_390_GOTENT:
1152 tls_type = GOT_NORMAL;
1153 break;
1154 case R_390_TLS_GD32:
1155 tls_type = GOT_TLS_GD;
1156 break;
1157 case R_390_TLS_IE32:
1158 case R_390_TLS_GOTIE32:
1159 tls_type = GOT_TLS_IE;
1160 break;
1161 case R_390_TLS_GOTIE12:
1162 case R_390_TLS_GOTIE20:
1163 case R_390_TLS_IEENT:
1164 tls_type = GOT_TLS_IE_NLT;
1165 break;
1166 }
1167
1168 if (h != NULL)
1169 {
1170 h->got.refcount += 1;
1171 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1172 }
1173 else
1174 {
1175 local_got_refcounts[r_symndx] += 1;
1176 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1177 }
1178 /* If a TLS symbol is accessed using IE at least once,
1179 there is no point to use dynamic model for it. */
1180 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1181 {
1182 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1183 {
1184 (*_bfd_error_handler)
1185 (_("%B: `%s' accessed both as normal and thread local symbol"),
1186 abfd, h->root.root.string);
1187 return FALSE;
1188 }
1189 if (old_tls_type > tls_type)
1190 tls_type = old_tls_type;
1191 }
1192
1193 if (old_tls_type != tls_type)
1194 {
1195 if (h != NULL)
1196 elf_s390_hash_entry (h)->tls_type = tls_type;
1197 else
1198 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1199 }
1200
1201 if (r_type != R_390_TLS_IE32)
1202 break;
1203 /* Fall through. */
1204
1205 case R_390_TLS_LE32:
1206 if (!info->shared)
1207 break;
1208 info->flags |= DF_STATIC_TLS;
1209 /* Fall through. */
1210
1211 case R_390_8:
1212 case R_390_16:
1213 case R_390_32:
1214 case R_390_PC16:
1215 case R_390_PC16DBL:
1216 case R_390_PC32DBL:
1217 case R_390_PC32:
1218 if (h != NULL && !info->shared)
1219 {
1220 /* If this reloc is in a read-only section, we might
1221 need a copy reloc. We can't check reliably at this
1222 stage whether the section is read-only, as input
1223 sections have not yet been mapped to output sections.
1224 Tentatively set the flag for now, and correct in
1225 adjust_dynamic_symbol. */
1226 h->non_got_ref = 1;
1227
1228 /* We may need a .plt entry if the function this reloc
1229 refers to is in a shared lib. */
1230 h->plt.refcount += 1;
1231 }
1232
1233 /* If we are creating a shared library, and this is a reloc
1234 against a global symbol, or a non PC relative reloc
1235 against a local symbol, then we need to copy the reloc
1236 into the shared library. However, if we are linking with
1237 -Bsymbolic, we do not need to copy a reloc against a
1238 global symbol which is defined in an object we are
1239 including in the link (i.e., DEF_REGULAR is set). At
1240 this point we have not seen all the input files, so it is
1241 possible that DEF_REGULAR is not set now but will be set
1242 later (it is never cleared). In case of a weak definition,
1243 DEF_REGULAR may be cleared later by a strong definition in
1244 a shared library. We account for that possibility below by
1245 storing information in the relocs_copied field of the hash
1246 table entry. A similar situation occurs when creating
1247 shared libraries and symbol visibility changes render the
1248 symbol local.
1249
1250 If on the other hand, we are creating an executable, we
1251 may need to keep relocations for symbols satisfied by a
1252 dynamic library if we manage to avoid copy relocs for the
1253 symbol. */
1254 if ((info->shared
1255 && (sec->flags & SEC_ALLOC) != 0
1256 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1257 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1258 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1259 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1260 || (h != NULL
1261 && (! info->symbolic
1262 || h->root.type == bfd_link_hash_defweak
1263 || !h->def_regular))))
1264 || (ELIMINATE_COPY_RELOCS
1265 && !info->shared
1266 && (sec->flags & SEC_ALLOC) != 0
1267 && h != NULL
1268 && (h->root.type == bfd_link_hash_defweak
1269 || !h->def_regular)))
1270 {
1271 struct elf_s390_dyn_relocs *p;
1272 struct elf_s390_dyn_relocs **head;
1273
1274 /* We must copy these reloc types into the output file.
1275 Create a reloc section in dynobj and make room for
1276 this reloc. */
1277 if (sreloc == NULL)
1278 {
1279 const char *name;
1280 bfd *dynobj;
1281
1282 name = (bfd_elf_string_from_elf_section
1283 (abfd,
1284 elf_elfheader (abfd)->e_shstrndx,
1285 elf_section_data (sec)->rel_hdr.sh_name));
1286 if (name == NULL)
1287 return FALSE;
1288
1289 if (! CONST_STRNEQ (name, ".rela")
1290 || strcmp (bfd_get_section_name (abfd, sec),
1291 name + 5) != 0)
1292 {
1293 (*_bfd_error_handler)
1294 (_("%B: bad relocation section name `%s\'"),
1295 abfd, name);
1296 }
1297
1298 if (htab->elf.dynobj == NULL)
1299 htab->elf.dynobj = abfd;
1300
1301 dynobj = htab->elf.dynobj;
1302 sreloc = bfd_get_section_by_name (dynobj, name);
1303 if (sreloc == NULL)
1304 {
1305 flagword flags;
1306
1307 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1308 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1309 if ((sec->flags & SEC_ALLOC) != 0)
1310 flags |= SEC_ALLOC | SEC_LOAD;
1311 sreloc = bfd_make_section_with_flags (dynobj,
1312 name,
1313 flags);
1314 if (sreloc == NULL
1315 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1316 return FALSE;
1317 }
1318 elf_section_data (sec)->sreloc = sreloc;
1319 }
1320
1321 /* If this is a global symbol, we count the number of
1322 relocations we need for this symbol. */
1323 if (h != NULL)
1324 {
1325 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1326 }
1327 else
1328 {
1329 /* Track dynamic relocs needed for local syms too.
1330 We really need local syms available to do this
1331 easily. Oh well. */
1332 asection *s;
1333 void *vpp;
1334
1335 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1336 sec, r_symndx);
1337 if (s == NULL)
1338 return FALSE;
1339
1340 vpp = &elf_section_data (s)->local_dynrel;
1341 head = (struct elf_s390_dyn_relocs **) vpp;
1342 }
1343
1344 p = *head;
1345 if (p == NULL || p->sec != sec)
1346 {
1347 bfd_size_type amt = sizeof *p;
1348
1349 p = ((struct elf_s390_dyn_relocs *)
1350 bfd_alloc (htab->elf.dynobj, amt));
1351 if (p == NULL)
1352 return FALSE;
1353 p->next = *head;
1354 *head = p;
1355 p->sec = sec;
1356 p->count = 0;
1357 p->pc_count = 0;
1358 }
1359
1360 p->count += 1;
1361 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1362 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1363 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1364 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1365 p->pc_count += 1;
1366 }
1367 break;
1368
1369 /* This relocation describes the C++ object vtable hierarchy.
1370 Reconstruct it for later use during GC. */
1371 case R_390_GNU_VTINHERIT:
1372 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1373 return FALSE;
1374 break;
1375
1376 /* This relocation describes which C++ vtable entries are actually
1377 used. Record for later use during GC. */
1378 case R_390_GNU_VTENTRY:
1379 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1380 return FALSE;
1381 break;
1382
1383 default:
1384 break;
1385 }
1386 }
1387
1388 return TRUE;
1389 }
1390
1391 /* Return the section that should be marked against GC for a given
1392 relocation. */
1393
1394 static asection *
elf_s390_gc_mark_hook(asection * sec,struct bfd_link_info * info,Elf_Internal_Rela * rel,struct elf_link_hash_entry * h,Elf_Internal_Sym * sym)1395 elf_s390_gc_mark_hook (asection *sec,
1396 struct bfd_link_info *info,
1397 Elf_Internal_Rela *rel,
1398 struct elf_link_hash_entry *h,
1399 Elf_Internal_Sym *sym)
1400 {
1401 if (h != NULL)
1402 switch (ELF32_R_TYPE (rel->r_info))
1403 {
1404 case R_390_GNU_VTINHERIT:
1405 case R_390_GNU_VTENTRY:
1406 return NULL;
1407 }
1408 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1409
1410 }
1411
1412 /* Update the got entry reference counts for the section being removed. */
1413
1414 static bfd_boolean
elf_s390_gc_sweep_hook(bfd * abfd,struct bfd_link_info * info,asection * sec,const Elf_Internal_Rela * relocs)1415 elf_s390_gc_sweep_hook (bfd *abfd,
1416 struct bfd_link_info *info,
1417 asection *sec,
1418 const Elf_Internal_Rela *relocs)
1419 {
1420 Elf_Internal_Shdr *symtab_hdr;
1421 struct elf_link_hash_entry **sym_hashes;
1422 bfd_signed_vma *local_got_refcounts;
1423 const Elf_Internal_Rela *rel, *relend;
1424
1425 elf_section_data (sec)->local_dynrel = NULL;
1426
1427 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
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_s390_dyn_relocs **pp;
1443 struct elf_s390_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
elf_s390_adjust_gotplt(h)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
elf_s390_adjust_dynamic_symbol(info,h)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 || (! info->shared
1594 && !h->def_dynamic
1595 && !h->ref_dynamic
1596 && h->root.type != bfd_link_hash_undefweak
1597 && h->root.type != bfd_link_hash_undefined))
1598 {
1599 /* This case can occur if we saw a PLT32 reloc in an input
1600 file, but the symbol was never referred to by a dynamic
1601 object, or if all references were garbage collected. In
1602 such a case, we don't actually need to build a procedure
1603 linkage table, and we can just do a PC32 reloc instead. */
1604 h->plt.offset = (bfd_vma) -1;
1605 h->needs_plt = 0;
1606 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1607 }
1608
1609 return TRUE;
1610 }
1611 else
1612 /* It's possible that we incorrectly decided a .plt reloc was
1613 needed for an R_390_PC32 reloc to a non-function sym in
1614 check_relocs. We can't decide accurately between function and
1615 non-function syms in check-relocs; Objects loaded later in
1616 the link may change h->type. So fix it now. */
1617 h->plt.offset = (bfd_vma) -1;
1618
1619 /* If this is a weak symbol, and there is a real definition, the
1620 processor independent code will have arranged for us to see the
1621 real definition first, and we can just use the same value. */
1622 if (h->u.weakdef != NULL)
1623 {
1624 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1625 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1626 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1627 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1628 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1629 h->non_got_ref = h->u.weakdef->non_got_ref;
1630 return TRUE;
1631 }
1632
1633 /* This is a reference to a symbol defined by a dynamic object which
1634 is not a function. */
1635
1636 /* If we are creating a shared library, we must presume that the
1637 only references to the symbol are via the global offset table.
1638 For such cases we need not do anything here; the relocations will
1639 be handled correctly by relocate_section. */
1640 if (info->shared)
1641 return TRUE;
1642
1643 /* If there are no references to this symbol that do not use the
1644 GOT, we don't need to generate a copy reloc. */
1645 if (!h->non_got_ref)
1646 return TRUE;
1647
1648 /* If -z nocopyreloc was given, we won't generate them either. */
1649 if (info->nocopyreloc)
1650 {
1651 h->non_got_ref = 0;
1652 return TRUE;
1653 }
1654
1655 if (ELIMINATE_COPY_RELOCS)
1656 {
1657 struct elf_s390_link_hash_entry * eh;
1658 struct elf_s390_dyn_relocs *p;
1659
1660 eh = (struct elf_s390_link_hash_entry *) h;
1661 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1662 {
1663 s = p->sec->output_section;
1664 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1665 break;
1666 }
1667
1668 /* If we didn't find any dynamic relocs in read-only sections, then
1669 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1670 if (p == NULL)
1671 {
1672 h->non_got_ref = 0;
1673 return TRUE;
1674 }
1675 }
1676
1677 if (h->size == 0)
1678 {
1679 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1680 h->root.root.string);
1681 return TRUE;
1682 }
1683
1684 /* We must allocate the symbol in our .dynbss section, which will
1685 become part of the .bss section of the executable. There will be
1686 an entry for this symbol in the .dynsym section. The dynamic
1687 object will contain position independent code, so all references
1688 from the dynamic object to this symbol will go through the global
1689 offset table. The dynamic linker will use the .dynsym entry to
1690 determine the address it must put in the global offset table, so
1691 both the dynamic object and the regular object will refer to the
1692 same memory location for the variable. */
1693
1694 htab = elf_s390_hash_table (info);
1695
1696 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1697 copy the initial value out of the dynamic object and into the
1698 runtime process image. */
1699 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1700 {
1701 htab->srelbss->size += sizeof (Elf32_External_Rela);
1702 h->needs_copy = 1;
1703 }
1704
1705 s = htab->sdynbss;
1706
1707 return _bfd_elf_adjust_dynamic_copy (h, s);
1708 }
1709
1710 /* Allocate space in .plt, .got and associated reloc sections for
1711 dynamic relocs. */
1712
1713 static bfd_boolean
allocate_dynrelocs(h,inf)1714 allocate_dynrelocs (h, inf)
1715 struct elf_link_hash_entry *h;
1716 PTR inf;
1717 {
1718 struct bfd_link_info *info;
1719 struct elf_s390_link_hash_table *htab;
1720 struct elf_s390_link_hash_entry *eh;
1721 struct elf_s390_dyn_relocs *p;
1722
1723 if (h->root.type == bfd_link_hash_indirect)
1724 return TRUE;
1725
1726 if (h->root.type == bfd_link_hash_warning)
1727 /* When warning symbols are created, they **replace** the "real"
1728 entry in the hash table, thus we never get to see the real
1729 symbol in a hash traversal. So look at it now. */
1730 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1731
1732 info = (struct bfd_link_info *) inf;
1733 htab = elf_s390_hash_table (info);
1734
1735 if (htab->elf.dynamic_sections_created
1736 && h->plt.refcount > 0
1737 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1738 || h->root.type != bfd_link_hash_undefweak))
1739 {
1740 /* Make sure this symbol is output as a dynamic symbol.
1741 Undefined weak syms won't yet be marked as dynamic. */
1742 if (h->dynindx == -1
1743 && !h->forced_local)
1744 {
1745 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1746 return FALSE;
1747 }
1748
1749 if (info->shared
1750 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1751 {
1752 asection *s = htab->splt;
1753
1754 /* If this is the first .plt entry, make room for the special
1755 first entry. */
1756 if (s->size == 0)
1757 s->size += PLT_FIRST_ENTRY_SIZE;
1758
1759 h->plt.offset = s->size;
1760
1761 /* If this symbol is not defined in a regular file, and we are
1762 not generating a shared library, then set the symbol to this
1763 location in the .plt. This is required to make function
1764 pointers compare as equal between the normal executable and
1765 the shared library. */
1766 if (! info->shared
1767 && !h->def_regular)
1768 {
1769 h->root.u.def.section = s;
1770 h->root.u.def.value = h->plt.offset;
1771 }
1772
1773 /* Make room for this entry. */
1774 s->size += PLT_ENTRY_SIZE;
1775
1776 /* We also need to make an entry in the .got.plt section, which
1777 will be placed in the .got section by the linker script. */
1778 htab->sgotplt->size += GOT_ENTRY_SIZE;
1779
1780 /* We also need to make an entry in the .rela.plt section. */
1781 htab->srelplt->size += sizeof (Elf32_External_Rela);
1782 }
1783 else
1784 {
1785 h->plt.offset = (bfd_vma) -1;
1786 h->needs_plt = 0;
1787 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1788 }
1789 }
1790 else
1791 {
1792 h->plt.offset = (bfd_vma) -1;
1793 h->needs_plt = 0;
1794 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1795 }
1796
1797 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1798 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1799 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1800 we can save the dynamic TLS relocation. */
1801 if (h->got.refcount > 0
1802 && !info->shared
1803 && h->dynindx == -1
1804 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1805 {
1806 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1807 /* For the GOTIE access without a literal pool entry the offset has
1808 to be stored somewhere. The immediate value in the instruction
1809 is not bit enough so the value is stored in the got. */
1810 {
1811 h->got.offset = htab->sgot->size;
1812 htab->sgot->size += GOT_ENTRY_SIZE;
1813 }
1814 else
1815 h->got.offset = (bfd_vma) -1;
1816 }
1817 else if (h->got.refcount > 0)
1818 {
1819 asection *s;
1820 bfd_boolean dyn;
1821 int tls_type = elf_s390_hash_entry(h)->tls_type;
1822
1823 /* Make sure this symbol is output as a dynamic symbol.
1824 Undefined weak syms won't yet be marked as dynamic. */
1825 if (h->dynindx == -1
1826 && !h->forced_local)
1827 {
1828 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1829 return FALSE;
1830 }
1831
1832 s = htab->sgot;
1833 h->got.offset = s->size;
1834 s->size += GOT_ENTRY_SIZE;
1835 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1836 if (tls_type == GOT_TLS_GD)
1837 s->size += GOT_ENTRY_SIZE;
1838 dyn = htab->elf.dynamic_sections_created;
1839 /* R_390_TLS_IE32 needs one dynamic relocation,
1840 R_390_TLS_GD32 needs one if local symbol and two if global. */
1841 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1842 || tls_type >= GOT_TLS_IE)
1843 htab->srelgot->size += sizeof (Elf32_External_Rela);
1844 else if (tls_type == GOT_TLS_GD)
1845 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1846 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1847 || h->root.type != bfd_link_hash_undefweak)
1848 && (info->shared
1849 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1850 htab->srelgot->size += sizeof (Elf32_External_Rela);
1851 }
1852 else
1853 h->got.offset = (bfd_vma) -1;
1854
1855 eh = (struct elf_s390_link_hash_entry *) h;
1856 if (eh->dyn_relocs == NULL)
1857 return TRUE;
1858
1859 /* In the shared -Bsymbolic case, discard space allocated for
1860 dynamic pc-relative relocs against symbols which turn out to be
1861 defined in regular objects. For the normal shared case, discard
1862 space for pc-relative relocs that have become local due to symbol
1863 visibility changes. */
1864
1865 if (info->shared)
1866 {
1867 if (SYMBOL_REFERENCES_LOCAL (info, h))
1868 {
1869 struct elf_s390_dyn_relocs **pp;
1870
1871 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1872 {
1873 p->count -= p->pc_count;
1874 p->pc_count = 0;
1875 if (p->count == 0)
1876 *pp = p->next;
1877 else
1878 pp = &p->next;
1879 }
1880 }
1881
1882 /* Also discard relocs on undefined weak syms with non-default
1883 visibility. */
1884 if (eh->dyn_relocs != NULL
1885 && h->root.type == bfd_link_hash_undefweak)
1886 {
1887 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1888 eh->dyn_relocs = NULL;
1889
1890 /* Make sure undefined weak symbols are output as a dynamic
1891 symbol in PIEs. */
1892 else if (h->dynindx == -1
1893 && !h->forced_local)
1894 {
1895 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1896 return FALSE;
1897 }
1898 }
1899 }
1900 else if (ELIMINATE_COPY_RELOCS)
1901 {
1902 /* For the non-shared case, discard space for relocs against
1903 symbols which turn out to need copy relocs or are not
1904 dynamic. */
1905
1906 if (!h->non_got_ref
1907 && ((h->def_dynamic
1908 && !h->def_regular)
1909 || (htab->elf.dynamic_sections_created
1910 && (h->root.type == bfd_link_hash_undefweak
1911 || h->root.type == bfd_link_hash_undefined))))
1912 {
1913 /* Make sure this symbol is output as a dynamic symbol.
1914 Undefined weak syms won't yet be marked as dynamic. */
1915 if (h->dynindx == -1
1916 && !h->forced_local)
1917 {
1918 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1919 return FALSE;
1920 }
1921
1922 /* If that succeeded, we know we'll be keeping all the
1923 relocs. */
1924 if (h->dynindx != -1)
1925 goto keep;
1926 }
1927
1928 eh->dyn_relocs = NULL;
1929
1930 keep: ;
1931 }
1932
1933 /* Finally, allocate space. */
1934 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1935 {
1936 asection *sreloc = elf_section_data (p->sec)->sreloc;
1937
1938 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1939 }
1940
1941 return TRUE;
1942 }
1943
1944 /* Find any dynamic relocs that apply to read-only sections. */
1945
1946 static bfd_boolean
readonly_dynrelocs(h,inf)1947 readonly_dynrelocs (h, inf)
1948 struct elf_link_hash_entry *h;
1949 PTR inf;
1950 {
1951 struct elf_s390_link_hash_entry *eh;
1952 struct elf_s390_dyn_relocs *p;
1953
1954 if (h->root.type == bfd_link_hash_warning)
1955 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1956
1957 eh = (struct elf_s390_link_hash_entry *) h;
1958 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1959 {
1960 asection *s = p->sec->output_section;
1961
1962 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1963 {
1964 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1965
1966 info->flags |= DF_TEXTREL;
1967
1968 /* Not an error, just cut short the traversal. */
1969 return FALSE;
1970 }
1971 }
1972 return TRUE;
1973 }
1974
1975 /* Set the sizes of the dynamic sections. */
1976
1977 static bfd_boolean
elf_s390_size_dynamic_sections(output_bfd,info)1978 elf_s390_size_dynamic_sections (output_bfd, info)
1979 bfd *output_bfd ATTRIBUTE_UNUSED;
1980 struct bfd_link_info *info;
1981 {
1982 struct elf_s390_link_hash_table *htab;
1983 bfd *dynobj;
1984 asection *s;
1985 bfd_boolean relocs;
1986 bfd *ibfd;
1987
1988 htab = elf_s390_hash_table (info);
1989 dynobj = htab->elf.dynobj;
1990 if (dynobj == NULL)
1991 abort ();
1992
1993 if (htab->elf.dynamic_sections_created)
1994 {
1995 /* Set the contents of the .interp section to the interpreter. */
1996 if (info->executable)
1997 {
1998 s = bfd_get_section_by_name (dynobj, ".interp");
1999 if (s == NULL)
2000 abort ();
2001 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2002 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2003 }
2004 }
2005
2006 /* Set up .got offsets for local syms, and space for local dynamic
2007 relocs. */
2008 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2009 {
2010 bfd_signed_vma *local_got;
2011 bfd_signed_vma *end_local_got;
2012 char *local_tls_type;
2013 bfd_size_type locsymcount;
2014 Elf_Internal_Shdr *symtab_hdr;
2015 asection *srela;
2016
2017 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2018 continue;
2019
2020 for (s = ibfd->sections; s != NULL; s = s->next)
2021 {
2022 struct elf_s390_dyn_relocs *p;
2023
2024 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2025 {
2026 if (!bfd_is_abs_section (p->sec)
2027 && bfd_is_abs_section (p->sec->output_section))
2028 {
2029 /* Input section has been discarded, either because
2030 it is a copy of a linkonce section or due to
2031 linker script /DISCARD/, so we'll be discarding
2032 the relocs too. */
2033 }
2034 else if (p->count != 0)
2035 {
2036 srela = elf_section_data (p->sec)->sreloc;
2037 srela->size += p->count * sizeof (Elf32_External_Rela);
2038 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2039 info->flags |= DF_TEXTREL;
2040 }
2041 }
2042 }
2043
2044 local_got = elf_local_got_refcounts (ibfd);
2045 if (!local_got)
2046 continue;
2047
2048 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2049 locsymcount = symtab_hdr->sh_info;
2050 end_local_got = local_got + locsymcount;
2051 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2052 s = htab->sgot;
2053 srela = htab->srelgot;
2054 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2055 {
2056 if (*local_got > 0)
2057 {
2058 *local_got = s->size;
2059 s->size += GOT_ENTRY_SIZE;
2060 if (*local_tls_type == GOT_TLS_GD)
2061 s->size += GOT_ENTRY_SIZE;
2062 if (info->shared)
2063 srela->size += sizeof (Elf32_External_Rela);
2064 }
2065 else
2066 *local_got = (bfd_vma) -1;
2067 }
2068 }
2069
2070 if (htab->tls_ldm_got.refcount > 0)
2071 {
2072 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2073 relocs. */
2074 htab->tls_ldm_got.offset = htab->sgot->size;
2075 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2076 htab->srelgot->size += sizeof (Elf32_External_Rela);
2077 }
2078 else
2079 htab->tls_ldm_got.offset = -1;
2080
2081 /* Allocate global sym .plt and .got entries, and space for global
2082 sym dynamic relocs. */
2083 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2084
2085 /* We now have determined the sizes of the various dynamic sections.
2086 Allocate memory for them. */
2087 relocs = FALSE;
2088 for (s = dynobj->sections; s != NULL; s = s->next)
2089 {
2090 if ((s->flags & SEC_LINKER_CREATED) == 0)
2091 continue;
2092
2093 if (s == htab->splt
2094 || s == htab->sgot
2095 || s == htab->sgotplt
2096 || s == htab->sdynbss)
2097 {
2098 /* Strip this section if we don't need it; see the
2099 comment below. */
2100 }
2101 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2102 {
2103 if (s->size != 0)
2104 relocs = TRUE;
2105
2106 /* We use the reloc_count field as a counter if we need
2107 to copy relocs into the output file. */
2108 s->reloc_count = 0;
2109 }
2110 else
2111 {
2112 /* It's not one of our sections, so don't allocate space. */
2113 continue;
2114 }
2115
2116 if (s->size == 0)
2117 {
2118 /* If we don't need this section, strip it from the
2119 output file. This is to handle .rela.bss and
2120 .rela.plt. We must create it in
2121 create_dynamic_sections, because it must be created
2122 before the linker maps input sections to output
2123 sections. The linker does that before
2124 adjust_dynamic_symbol is called, and it is that
2125 function which decides whether anything needs to go
2126 into these sections. */
2127
2128 s->flags |= SEC_EXCLUDE;
2129 continue;
2130 }
2131
2132 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2133 continue;
2134
2135 /* Allocate memory for the section contents. We use bfd_zalloc
2136 here in case unused entries are not reclaimed before the
2137 section's contents are written out. This should not happen,
2138 but this way if it does, we get a R_390_NONE reloc instead
2139 of garbage. */
2140 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2141 if (s->contents == NULL)
2142 return FALSE;
2143 }
2144
2145 if (htab->elf.dynamic_sections_created)
2146 {
2147 /* Add some entries to the .dynamic section. We fill in the
2148 values later, in elf_s390_finish_dynamic_sections, but we
2149 must add the entries now so that we get the correct size for
2150 the .dynamic section. The DT_DEBUG entry is filled in by the
2151 dynamic linker and used by the debugger. */
2152 #define add_dynamic_entry(TAG, VAL) \
2153 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2154
2155 if (info->executable)
2156 {
2157 if (!add_dynamic_entry (DT_DEBUG, 0))
2158 return FALSE;
2159 }
2160
2161 if (htab->splt->size != 0)
2162 {
2163 if (!add_dynamic_entry (DT_PLTGOT, 0)
2164 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2165 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2166 || !add_dynamic_entry (DT_JMPREL, 0))
2167 return FALSE;
2168 }
2169
2170 if (relocs)
2171 {
2172 if (!add_dynamic_entry (DT_RELA, 0)
2173 || !add_dynamic_entry (DT_RELASZ, 0)
2174 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2175 return FALSE;
2176
2177 /* If any dynamic relocs apply to a read-only section,
2178 then we need a DT_TEXTREL entry. */
2179 if ((info->flags & DF_TEXTREL) == 0)
2180 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2181 (PTR) info);
2182
2183 if ((info->flags & DF_TEXTREL) != 0)
2184 {
2185 if (!add_dynamic_entry (DT_TEXTREL, 0))
2186 return FALSE;
2187 }
2188 }
2189 }
2190 #undef add_dynamic_entry
2191
2192 return TRUE;
2193 }
2194
2195 /* Return the base VMA address which should be subtracted from real addresses
2196 when resolving @dtpoff relocation.
2197 This is PT_TLS segment p_vaddr. */
2198
2199 static bfd_vma
dtpoff_base(info)2200 dtpoff_base (info)
2201 struct bfd_link_info *info;
2202 {
2203 /* If tls_sec is NULL, we should have signalled an error already. */
2204 if (elf_hash_table (info)->tls_sec == NULL)
2205 return 0;
2206 return elf_hash_table (info)->tls_sec->vma;
2207 }
2208
2209 /* Return the relocation value for @tpoff relocation
2210 if STT_TLS virtual address is ADDRESS. */
2211
2212 static bfd_vma
tpoff(info,address)2213 tpoff (info, address)
2214 struct bfd_link_info *info;
2215 bfd_vma address;
2216 {
2217 struct elf_link_hash_table *htab = elf_hash_table (info);
2218
2219 /* If tls_sec is NULL, we should have signalled an error already. */
2220 if (htab->tls_sec == NULL)
2221 return 0;
2222 return htab->tls_size + htab->tls_sec->vma - address;
2223 }
2224
2225 /* Complain if TLS instruction relocation is against an invalid
2226 instruction. */
2227
2228 static void
invalid_tls_insn(input_bfd,input_section,rel)2229 invalid_tls_insn (input_bfd, input_section, rel)
2230 bfd *input_bfd;
2231 asection *input_section;
2232 Elf_Internal_Rela *rel;
2233 {
2234 reloc_howto_type *howto;
2235
2236 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2237 (*_bfd_error_handler)
2238 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2239 input_bfd,
2240 input_section,
2241 (long) rel->r_offset,
2242 howto->name);
2243 bfd_set_error (bfd_error_bad_value);
2244 }
2245
2246 /* Relocate a 390 ELF section. */
2247
2248 static bfd_boolean
elf_s390_relocate_section(output_bfd,info,input_bfd,input_section,contents,relocs,local_syms,local_sections)2249 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2250 contents, relocs, local_syms, local_sections)
2251 bfd *output_bfd;
2252 struct bfd_link_info *info;
2253 bfd *input_bfd;
2254 asection *input_section;
2255 bfd_byte *contents;
2256 Elf_Internal_Rela *relocs;
2257 Elf_Internal_Sym *local_syms;
2258 asection **local_sections;
2259 {
2260 struct elf_s390_link_hash_table *htab;
2261 Elf_Internal_Shdr *symtab_hdr;
2262 struct elf_link_hash_entry **sym_hashes;
2263 bfd_vma *local_got_offsets;
2264 Elf_Internal_Rela *rel;
2265 Elf_Internal_Rela *relend;
2266
2267 htab = elf_s390_hash_table (info);
2268 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2269 sym_hashes = elf_sym_hashes (input_bfd);
2270 local_got_offsets = elf_local_got_offsets (input_bfd);
2271
2272 rel = relocs;
2273 relend = relocs + input_section->reloc_count;
2274 for (; rel < relend; rel++)
2275 {
2276 unsigned int r_type;
2277 reloc_howto_type *howto;
2278 unsigned long r_symndx;
2279 struct elf_link_hash_entry *h;
2280 Elf_Internal_Sym *sym;
2281 asection *sec;
2282 bfd_vma off;
2283 bfd_vma relocation;
2284 bfd_boolean unresolved_reloc;
2285 bfd_reloc_status_type r;
2286 int tls_type;
2287
2288 r_type = ELF32_R_TYPE (rel->r_info);
2289 if (r_type == (int) R_390_GNU_VTINHERIT
2290 || r_type == (int) R_390_GNU_VTENTRY)
2291 continue;
2292 if (r_type >= (int) R_390_max)
2293 {
2294 bfd_set_error (bfd_error_bad_value);
2295 return FALSE;
2296 }
2297
2298 howto = elf_howto_table + r_type;
2299 r_symndx = ELF32_R_SYM (rel->r_info);
2300
2301 h = NULL;
2302 sym = NULL;
2303 sec = NULL;
2304 unresolved_reloc = FALSE;
2305 if (r_symndx < symtab_hdr->sh_info)
2306 {
2307 sym = local_syms + r_symndx;
2308 sec = local_sections[r_symndx];
2309 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2310 }
2311 else
2312 {
2313 bfd_boolean warned ATTRIBUTE_UNUSED;
2314
2315 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2316 r_symndx, symtab_hdr, sym_hashes,
2317 h, sec, relocation,
2318 unresolved_reloc, warned);
2319 }
2320
2321 if (sec != NULL && elf_discarded_section (sec))
2322 {
2323 /* For relocs against symbols from removed linkonce sections,
2324 or sections discarded by a linker script, we just want the
2325 section contents zeroed. Avoid any special processing. */
2326 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2327 rel->r_info = 0;
2328 rel->r_addend = 0;
2329 continue;
2330 }
2331
2332 if (info->relocatable)
2333 continue;
2334
2335 switch (r_type)
2336 {
2337 case R_390_GOTPLT12:
2338 case R_390_GOTPLT16:
2339 case R_390_GOTPLT20:
2340 case R_390_GOTPLT32:
2341 case R_390_GOTPLTENT:
2342 /* There are three cases for a GOTPLT relocation. 1) The
2343 relocation is against the jump slot entry of a plt that
2344 will get emitted to the output file. 2) The relocation
2345 is against the jump slot of a plt entry that has been
2346 removed. elf_s390_adjust_gotplt has created a GOT entry
2347 as replacement. 3) The relocation is against a local symbol.
2348 Cases 2) and 3) are the same as the GOT relocation code
2349 so we just have to test for case 1 and fall through for
2350 the other two. */
2351 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2352 {
2353 bfd_vma plt_index;
2354
2355 /* Calc. index no.
2356 Current offset - size first entry / entry size. */
2357 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2358 PLT_ENTRY_SIZE;
2359
2360 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2361 addr & GOT addr. */
2362 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2363 unresolved_reloc = FALSE;
2364
2365 if (r_type == R_390_GOTPLTENT)
2366 relocation += htab->sgot->output_section->vma;
2367 break;
2368 }
2369 /* Fall through. */
2370
2371 case R_390_GOT12:
2372 case R_390_GOT16:
2373 case R_390_GOT20:
2374 case R_390_GOT32:
2375 case R_390_GOTENT:
2376 /* Relocation is to the entry for this symbol in the global
2377 offset table. */
2378 if (htab->sgot == NULL)
2379 abort ();
2380
2381 if (h != NULL)
2382 {
2383 bfd_boolean dyn;
2384
2385 off = h->got.offset;
2386 dyn = htab->elf.dynamic_sections_created;
2387 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2388 || (info->shared
2389 && (info->symbolic
2390 || h->dynindx == -1
2391 || h->forced_local)
2392 && h->def_regular)
2393 || (ELF_ST_VISIBILITY (h->other)
2394 && h->root.type == bfd_link_hash_undefweak))
2395 {
2396 /* This is actually a static link, or it is a
2397 -Bsymbolic link and the symbol is defined
2398 locally, or the symbol was forced to be local
2399 because of a version file. We must initialize
2400 this entry in the global offset table. Since the
2401 offset must always be a multiple of 2, we use the
2402 least significant bit to record whether we have
2403 initialized it already.
2404
2405 When doing a dynamic link, we create a .rel.got
2406 relocation entry to initialize the value. This
2407 is done in the finish_dynamic_symbol routine. */
2408 if ((off & 1) != 0)
2409 off &= ~1;
2410 else
2411 {
2412 bfd_put_32 (output_bfd, relocation,
2413 htab->sgot->contents + off);
2414 h->got.offset |= 1;
2415 }
2416 }
2417 else
2418 unresolved_reloc = FALSE;
2419 }
2420 else
2421 {
2422 if (local_got_offsets == NULL)
2423 abort ();
2424
2425 off = local_got_offsets[r_symndx];
2426
2427 /* The offset must always be a multiple of 4. We use
2428 the least significant bit to record whether we have
2429 already generated the necessary reloc. */
2430 if ((off & 1) != 0)
2431 off &= ~1;
2432 else
2433 {
2434 bfd_put_32 (output_bfd, relocation,
2435 htab->sgot->contents + off);
2436
2437 if (info->shared)
2438 {
2439 asection *srelgot;
2440 Elf_Internal_Rela outrel;
2441 bfd_byte *loc;
2442
2443 srelgot = htab->srelgot;
2444 if (srelgot == NULL)
2445 abort ();
2446
2447 outrel.r_offset = (htab->sgot->output_section->vma
2448 + htab->sgot->output_offset
2449 + off);
2450 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2451 outrel.r_addend = relocation;
2452 loc = srelgot->contents;
2453 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2454 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2455 }
2456
2457 local_got_offsets[r_symndx] |= 1;
2458 }
2459 }
2460
2461 if (off >= (bfd_vma) -2)
2462 abort ();
2463
2464 relocation = htab->sgot->output_offset + off;
2465
2466 /* For @GOTENT the relocation is against the offset between
2467 the instruction and the symbols entry in the GOT and not
2468 between the start of the GOT and the symbols entry. We
2469 add the vma of the GOT to get the correct value. */
2470 if ( r_type == R_390_GOTENT
2471 || r_type == R_390_GOTPLTENT)
2472 relocation += htab->sgot->output_section->vma;
2473
2474 break;
2475
2476 case R_390_GOTOFF16:
2477 case R_390_GOTOFF32:
2478 /* Relocation is relative to the start of the global offset
2479 table. */
2480
2481 /* Note that sgot->output_offset is not involved in this
2482 calculation. We always want the start of .got. If we
2483 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2484 permitted by the ABI, we might have to change this
2485 calculation. */
2486 relocation -= htab->sgot->output_section->vma;
2487 break;
2488
2489 case R_390_GOTPC:
2490 case R_390_GOTPCDBL:
2491 /* Use global offset table as symbol value. */
2492 relocation = htab->sgot->output_section->vma;
2493 unresolved_reloc = FALSE;
2494 break;
2495
2496 case R_390_PLT16DBL:
2497 case R_390_PLT32DBL:
2498 case R_390_PLT32:
2499 /* Relocation is to the entry for this symbol in the
2500 procedure linkage table. */
2501
2502 /* Resolve a PLT32 reloc against a local symbol directly,
2503 without using the procedure linkage table. */
2504 if (h == NULL)
2505 break;
2506
2507 if (h->plt.offset == (bfd_vma) -1
2508 || htab->splt == NULL)
2509 {
2510 /* We didn't make a PLT entry for this symbol. This
2511 happens when statically linking PIC code, or when
2512 using -Bsymbolic. */
2513 break;
2514 }
2515
2516 relocation = (htab->splt->output_section->vma
2517 + htab->splt->output_offset
2518 + h->plt.offset);
2519 unresolved_reloc = FALSE;
2520 break;
2521
2522 case R_390_PLTOFF16:
2523 case R_390_PLTOFF32:
2524 /* Relocation is to the entry for this symbol in the
2525 procedure linkage table relative to the start of the GOT. */
2526
2527 /* For local symbols or if we didn't make a PLT entry for
2528 this symbol resolve the symbol directly. */
2529 if ( h == NULL
2530 || h->plt.offset == (bfd_vma) -1
2531 || htab->splt == NULL)
2532 {
2533 relocation -= htab->sgot->output_section->vma;
2534 break;
2535 }
2536
2537 relocation = (htab->splt->output_section->vma
2538 + htab->splt->output_offset
2539 + h->plt.offset
2540 - htab->sgot->output_section->vma);
2541 unresolved_reloc = FALSE;
2542 break;
2543
2544 case R_390_8:
2545 case R_390_16:
2546 case R_390_32:
2547 case R_390_PC16:
2548 case R_390_PC16DBL:
2549 case R_390_PC32DBL:
2550 case R_390_PC32:
2551 if ((input_section->flags & SEC_ALLOC) == 0)
2552 break;
2553
2554 if ((info->shared
2555 && (h == NULL
2556 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2557 || h->root.type != bfd_link_hash_undefweak)
2558 && ((r_type != R_390_PC16
2559 && r_type != R_390_PC16DBL
2560 && r_type != R_390_PC32DBL
2561 && r_type != R_390_PC32)
2562 || (h != NULL
2563 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2564 || (ELIMINATE_COPY_RELOCS
2565 && !info->shared
2566 && h != NULL
2567 && h->dynindx != -1
2568 && !h->non_got_ref
2569 && ((h->def_dynamic
2570 && !h->def_regular)
2571 || h->root.type == bfd_link_hash_undefweak
2572 || h->root.type == bfd_link_hash_undefined)))
2573 {
2574 Elf_Internal_Rela outrel;
2575 bfd_boolean skip, relocate;
2576 asection *sreloc;
2577 bfd_byte *loc;
2578
2579 /* When generating a shared object, these relocations
2580 are copied into the output file to be resolved at run
2581 time. */
2582
2583 skip = FALSE;
2584 relocate = FALSE;
2585
2586 outrel.r_offset =
2587 _bfd_elf_section_offset (output_bfd, info, input_section,
2588 rel->r_offset);
2589 if (outrel.r_offset == (bfd_vma) -1)
2590 skip = TRUE;
2591 else if (outrel.r_offset == (bfd_vma) -2)
2592 skip = TRUE, relocate = TRUE;
2593 outrel.r_offset += (input_section->output_section->vma
2594 + input_section->output_offset);
2595
2596 if (skip)
2597 memset (&outrel, 0, sizeof outrel);
2598 else if (h != NULL
2599 && h->dynindx != -1
2600 && (r_type == R_390_PC16
2601 || r_type == R_390_PC16DBL
2602 || r_type == R_390_PC32DBL
2603 || r_type == R_390_PC32
2604 || !info->shared
2605 || !info->symbolic
2606 || !h->def_regular))
2607 {
2608 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2609 outrel.r_addend = rel->r_addend;
2610 }
2611 else
2612 {
2613 /* This symbol is local, or marked to become local. */
2614 outrel.r_addend = relocation + rel->r_addend;
2615 if (r_type == R_390_32)
2616 {
2617 relocate = TRUE;
2618 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2619 }
2620 else
2621 {
2622 long sindx;
2623
2624 if (bfd_is_abs_section (sec))
2625 sindx = 0;
2626 else if (sec == NULL || sec->owner == NULL)
2627 {
2628 bfd_set_error(bfd_error_bad_value);
2629 return FALSE;
2630 }
2631 else
2632 {
2633 asection *osec;
2634
2635 osec = sec->output_section;
2636 sindx = elf_section_data (osec)->dynindx;
2637 if (sindx == 0)
2638 {
2639 osec = htab->elf.text_index_section;
2640 sindx = elf_section_data (osec)->dynindx;
2641 }
2642 BFD_ASSERT (sindx != 0);
2643
2644 /* We are turning this relocation into one
2645 against a section symbol, so subtract out
2646 the output section's address but not the
2647 offset of the input section in the output
2648 section. */
2649 outrel.r_addend -= osec->vma;
2650 }
2651 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2652 }
2653 }
2654
2655 sreloc = elf_section_data (input_section)->sreloc;
2656 if (sreloc == NULL)
2657 abort ();
2658
2659 loc = sreloc->contents;
2660 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2661 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2662
2663 /* If this reloc is against an external symbol, we do
2664 not want to fiddle with the addend. Otherwise, we
2665 need to include the symbol value so that it becomes
2666 an addend for the dynamic reloc. */
2667 if (! relocate)
2668 continue;
2669 }
2670 break;
2671
2672 /* Relocations for tls literal pool entries. */
2673 case R_390_TLS_IE32:
2674 if (info->shared)
2675 {
2676 Elf_Internal_Rela outrel;
2677 asection *sreloc;
2678 bfd_byte *loc;
2679
2680 outrel.r_offset = rel->r_offset
2681 + input_section->output_section->vma
2682 + input_section->output_offset;
2683 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2684 sreloc = elf_section_data (input_section)->sreloc;
2685 if (sreloc == NULL)
2686 abort ();
2687 loc = sreloc->contents;
2688 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2689 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2690 }
2691 /* Fall through. */
2692
2693 case R_390_TLS_GD32:
2694 case R_390_TLS_GOTIE32:
2695 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2696 tls_type = GOT_UNKNOWN;
2697 if (h == NULL && local_got_offsets)
2698 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2699 else if (h != NULL)
2700 {
2701 tls_type = elf_s390_hash_entry(h)->tls_type;
2702 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2703 r_type = R_390_TLS_LE32;
2704 }
2705 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2706 r_type = R_390_TLS_IE32;
2707
2708 if (r_type == R_390_TLS_LE32)
2709 {
2710 /* This relocation gets optimized away by the local exec
2711 access optimization. */
2712 BFD_ASSERT (! unresolved_reloc);
2713 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2714 contents + rel->r_offset);
2715 continue;
2716 }
2717
2718 if (htab->sgot == NULL)
2719 abort ();
2720
2721 if (h != NULL)
2722 off = h->got.offset;
2723 else
2724 {
2725 if (local_got_offsets == NULL)
2726 abort ();
2727
2728 off = local_got_offsets[r_symndx];
2729 }
2730
2731 emit_tls_relocs:
2732
2733 if ((off & 1) != 0)
2734 off &= ~1;
2735 else
2736 {
2737 Elf_Internal_Rela outrel;
2738 bfd_byte *loc;
2739 int dr_type, indx;
2740
2741 if (htab->srelgot == NULL)
2742 abort ();
2743
2744 outrel.r_offset = (htab->sgot->output_section->vma
2745 + htab->sgot->output_offset + off);
2746
2747 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2748 if (r_type == R_390_TLS_GD32)
2749 dr_type = R_390_TLS_DTPMOD;
2750 else
2751 dr_type = R_390_TLS_TPOFF;
2752 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2753 outrel.r_addend = relocation - dtpoff_base (info);
2754 else
2755 outrel.r_addend = 0;
2756 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2757 loc = htab->srelgot->contents;
2758 loc += htab->srelgot->reloc_count++
2759 * sizeof (Elf32_External_Rela);
2760 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2761
2762 if (r_type == R_390_TLS_GD32)
2763 {
2764 if (indx == 0)
2765 {
2766 BFD_ASSERT (! unresolved_reloc);
2767 bfd_put_32 (output_bfd,
2768 relocation - dtpoff_base (info),
2769 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2770 }
2771 else
2772 {
2773 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2774 outrel.r_offset += GOT_ENTRY_SIZE;
2775 outrel.r_addend = 0;
2776 htab->srelgot->reloc_count++;
2777 loc += sizeof (Elf32_External_Rela);
2778 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2779 }
2780 }
2781
2782 if (h != NULL)
2783 h->got.offset |= 1;
2784 else
2785 local_got_offsets[r_symndx] |= 1;
2786 }
2787
2788 if (off >= (bfd_vma) -2)
2789 abort ();
2790 if (r_type == ELF32_R_TYPE (rel->r_info))
2791 {
2792 relocation = htab->sgot->output_offset + off;
2793 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2794 relocation += htab->sgot->output_section->vma;
2795 unresolved_reloc = FALSE;
2796 }
2797 else
2798 {
2799 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2800 contents + rel->r_offset);
2801 continue;
2802 }
2803 break;
2804
2805 case R_390_TLS_GOTIE12:
2806 case R_390_TLS_GOTIE20:
2807 case R_390_TLS_IEENT:
2808 if (h == NULL)
2809 {
2810 if (local_got_offsets == NULL)
2811 abort();
2812 off = local_got_offsets[r_symndx];
2813 if (info->shared)
2814 goto emit_tls_relocs;
2815 }
2816 else
2817 {
2818 off = h->got.offset;
2819 tls_type = elf_s390_hash_entry(h)->tls_type;
2820 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2821 goto emit_tls_relocs;
2822 }
2823
2824 if (htab->sgot == NULL)
2825 abort ();
2826
2827 BFD_ASSERT (! unresolved_reloc);
2828 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2829 htab->sgot->contents + off);
2830 relocation = htab->sgot->output_offset + off;
2831 if (r_type == R_390_TLS_IEENT)
2832 relocation += htab->sgot->output_section->vma;
2833 unresolved_reloc = FALSE;
2834 break;
2835
2836 case R_390_TLS_LDM32:
2837 if (! info->shared)
2838 /* The literal pool entry this relocation refers to gets ignored
2839 by the optimized code of the local exec model. Do nothing
2840 and the value will turn out zero. */
2841 continue;
2842
2843 if (htab->sgot == NULL)
2844 abort ();
2845
2846 off = htab->tls_ldm_got.offset;
2847 if (off & 1)
2848 off &= ~1;
2849 else
2850 {
2851 Elf_Internal_Rela outrel;
2852 bfd_byte *loc;
2853
2854 if (htab->srelgot == NULL)
2855 abort ();
2856
2857 outrel.r_offset = (htab->sgot->output_section->vma
2858 + htab->sgot->output_offset + off);
2859
2860 bfd_put_32 (output_bfd, 0,
2861 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2862 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2863 outrel.r_addend = 0;
2864 loc = htab->srelgot->contents;
2865 loc += htab->srelgot->reloc_count++
2866 * sizeof (Elf32_External_Rela);
2867 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2868 htab->tls_ldm_got.offset |= 1;
2869 }
2870 relocation = htab->sgot->output_offset + off;
2871 unresolved_reloc = FALSE;
2872 break;
2873
2874 case R_390_TLS_LE32:
2875 if (info->shared)
2876 {
2877 /* Linking a shared library with non-fpic code requires
2878 a R_390_TLS_TPOFF relocation. */
2879 Elf_Internal_Rela outrel;
2880 asection *sreloc;
2881 bfd_byte *loc;
2882 int indx;
2883
2884 outrel.r_offset = rel->r_offset
2885 + input_section->output_section->vma
2886 + input_section->output_offset;
2887 if (h != NULL && h->dynindx != -1)
2888 indx = h->dynindx;
2889 else
2890 indx = 0;
2891 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2892 if (indx == 0)
2893 outrel.r_addend = relocation - dtpoff_base (info);
2894 else
2895 outrel.r_addend = 0;
2896 sreloc = elf_section_data (input_section)->sreloc;
2897 if (sreloc == NULL)
2898 abort ();
2899 loc = sreloc->contents;
2900 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2901 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2902 }
2903 else
2904 {
2905 BFD_ASSERT (! unresolved_reloc);
2906 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2907 contents + rel->r_offset);
2908 }
2909 continue;
2910
2911 case R_390_TLS_LDO32:
2912 if (info->shared)
2913 relocation -= dtpoff_base (info);
2914 else
2915 /* When converting LDO to LE, we must negate. */
2916 relocation = -tpoff (info, relocation);
2917 break;
2918
2919 /* Relocations for tls instructions. */
2920 case R_390_TLS_LOAD:
2921 case R_390_TLS_GDCALL:
2922 case R_390_TLS_LDCALL:
2923 tls_type = GOT_UNKNOWN;
2924 if (h == NULL && local_got_offsets)
2925 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2926 else if (h != NULL)
2927 tls_type = elf_s390_hash_entry(h)->tls_type;
2928
2929 if (tls_type == GOT_TLS_GD)
2930 continue;
2931
2932 if (r_type == R_390_TLS_LOAD)
2933 {
2934 if (!info->shared && (h == NULL || h->dynindx == -1))
2935 {
2936 /* IE->LE transition. Four valid cases:
2937 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2938 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2939 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2940 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2941 unsigned int insn, ry;
2942
2943 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2944 ry = 0;
2945 if ((insn & 0xff00f000) == 0x58000000)
2946 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2947 ry = (insn & 0x000f0000);
2948 else if ((insn & 0xff0f0000) == 0x58000000)
2949 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2950 ry = (insn & 0x0000f000) << 4;
2951 else if ((insn & 0xff00f000) == 0x5800c000)
2952 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2953 ry = (insn & 0x000f0000);
2954 else if ((insn & 0xff0f0000) == 0x580c0000)
2955 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2956 ry = (insn & 0x0000f000) << 4;
2957 else
2958 invalid_tls_insn (input_bfd, input_section, rel);
2959 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2960 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2961 }
2962 }
2963 else if (r_type == R_390_TLS_GDCALL)
2964 {
2965 unsigned int insn;
2966
2967 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2968 if ((insn & 0xff000fff) != 0x4d000000 &&
2969 (insn & 0xffff0000) != 0xc0e50000)
2970 invalid_tls_insn (input_bfd, input_section, rel);
2971 if (!info->shared && (h == NULL || h->dynindx == -1))
2972 {
2973 if ((insn & 0xff000000) == 0x4d000000)
2974 {
2975 /* GD->LE transition.
2976 bas %r14,0(%rx,%r13) -> bc 0,0 */
2977 insn = 0x47000000;
2978 }
2979 else
2980 {
2981 /* GD->LE transition.
2982 brasl %r14,_tls_get_addr@plt -> brcl 0,. */
2983 insn = 0xc0040000;
2984 bfd_put_16 (output_bfd, 0x0000,
2985 contents + rel->r_offset + 4);
2986 }
2987 }
2988 else
2989 {
2990 if ((insn & 0xff000000) == 0x4d000000)
2991 {
2992 /* GD->IE transition.
2993 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2994 insn = 0x5822c000;
2995 }
2996 else
2997 {
2998 /* GD->IE transition.
2999 brasl %r14,__tls_get_addr@plt ->
3000 l %r2,0(%r2,%r12) ; bcr 0,0 */
3001 insn = 0x5822c000;
3002 bfd_put_16 (output_bfd, 0x0700,
3003 contents + rel->r_offset + 4);
3004 }
3005 }
3006 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3007 }
3008 else if (r_type == R_390_TLS_LDCALL)
3009 {
3010 if (!info->shared)
3011 {
3012 unsigned int insn;
3013
3014 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3015 if ((insn & 0xff000fff) != 0x4d000000 &&
3016 (insn & 0xffff0000) != 0xc0e50000)
3017 invalid_tls_insn (input_bfd, input_section, rel);
3018 if ((insn & 0xff000000) == 0x4d000000)
3019 {
3020 /* LD->LE transition.
3021 bas %r14,0(%rx,%r13) -> bc 0,0 */
3022 insn = 0x47000000;
3023 }
3024 else
3025 {
3026 /* LD->LE transition.
3027 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3028 insn = 0xc0040000;
3029 bfd_put_16 (output_bfd, 0x0000,
3030 contents + rel->r_offset + 4);
3031 }
3032 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3033 }
3034 }
3035 continue;
3036
3037 default:
3038 break;
3039 }
3040
3041 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3042 because such sections are not SEC_ALLOC and thus ld.so will
3043 not process them. */
3044 if (unresolved_reloc
3045 && !((input_section->flags & SEC_DEBUGGING) != 0
3046 && h->def_dynamic))
3047 (*_bfd_error_handler)
3048 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3049 input_bfd,
3050 input_section,
3051 (long) rel->r_offset,
3052 howto->name,
3053 h->root.root.string);
3054
3055 if (r_type == R_390_20
3056 || r_type == R_390_GOT20
3057 || r_type == R_390_GOTPLT20
3058 || r_type == R_390_TLS_GOTIE20)
3059 {
3060 relocation += rel->r_addend;
3061 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3062 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3063 contents, rel->r_offset,
3064 relocation, 0);
3065 }
3066 else
3067 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3068 contents, rel->r_offset,
3069 relocation, rel->r_addend);
3070
3071 if (r != bfd_reloc_ok)
3072 {
3073 const char *name;
3074
3075 if (h != NULL)
3076 name = h->root.root.string;
3077 else
3078 {
3079 name = bfd_elf_string_from_elf_section (input_bfd,
3080 symtab_hdr->sh_link,
3081 sym->st_name);
3082 if (name == NULL)
3083 return FALSE;
3084 if (*name == '\0')
3085 name = bfd_section_name (input_bfd, sec);
3086 }
3087
3088 if (r == bfd_reloc_overflow)
3089 {
3090
3091 if (! ((*info->callbacks->reloc_overflow)
3092 (info, (h ? &h->root : NULL), name, howto->name,
3093 (bfd_vma) 0, input_bfd, input_section,
3094 rel->r_offset)))
3095 return FALSE;
3096 }
3097 else
3098 {
3099 (*_bfd_error_handler)
3100 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3101 input_bfd, input_section,
3102 (long) rel->r_offset, name, (int) r);
3103 return FALSE;
3104 }
3105 }
3106 }
3107
3108 return TRUE;
3109 }
3110
3111 /* Finish up dynamic symbol handling. We set the contents of various
3112 dynamic sections here. */
3113
3114 static bfd_boolean
elf_s390_finish_dynamic_symbol(output_bfd,info,h,sym)3115 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3116 bfd *output_bfd;
3117 struct bfd_link_info *info;
3118 struct elf_link_hash_entry *h;
3119 Elf_Internal_Sym *sym;
3120 {
3121 struct elf_s390_link_hash_table *htab;
3122
3123 htab = elf_s390_hash_table (info);
3124
3125 if (h->plt.offset != (bfd_vma) -1)
3126 {
3127 bfd_vma plt_index;
3128 bfd_vma got_offset;
3129 Elf_Internal_Rela rela;
3130 bfd_byte *loc;
3131 bfd_vma relative_offset;
3132
3133 /* This symbol has an entry in the procedure linkage table. Set
3134 it up. */
3135 if (h->dynindx == -1
3136 || htab->splt == NULL
3137 || htab->sgotplt == NULL
3138 || htab->srelplt == NULL)
3139 abort ();
3140
3141 /* Calc. index no.
3142 Current offset - size first entry / entry size. */
3143 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3144
3145 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3146 addr & GOT addr. */
3147 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3148
3149 /* S390 uses halfwords for relative branch calc! */
3150 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3151 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3152 /* If offset is > 32768, branch to a previous branch
3153 390 can only handle +-64 K jumps. */
3154 if ( -32768 > (int) relative_offset )
3155 relative_offset
3156 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3157
3158 /* Fill in the entry in the procedure linkage table. */
3159 if (!info->shared)
3160 {
3161 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3162 htab->splt->contents + h->plt.offset);
3163 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3164 htab->splt->contents + h->plt.offset + 4);
3165 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3166 htab->splt->contents + h->plt.offset + 8);
3167 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3168 htab->splt->contents + h->plt.offset + 12);
3169 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3170 htab->splt->contents + h->plt.offset + 16);
3171 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3172 htab->splt->contents + h->plt.offset + 20);
3173 bfd_put_32 (output_bfd,
3174 (htab->sgotplt->output_section->vma
3175 + htab->sgotplt->output_offset
3176 + got_offset),
3177 htab->splt->contents + h->plt.offset + 24);
3178 }
3179 else if (got_offset < 4096)
3180 {
3181 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3182 htab->splt->contents + h->plt.offset);
3183 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3184 htab->splt->contents + h->plt.offset + 4);
3185 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3186 htab->splt->contents + h->plt.offset + 8);
3187 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3188 htab->splt->contents + h->plt.offset + 12);
3189 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3190 htab->splt->contents + h->plt.offset + 16);
3191 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3192 htab->splt->contents + h->plt.offset + 20);
3193 bfd_put_32 (output_bfd, (bfd_vma) 0,
3194 htab->splt->contents + h->plt.offset + 24);
3195 }
3196 else if (got_offset < 32768)
3197 {
3198 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3199 htab->splt->contents + h->plt.offset);
3200 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3201 htab->splt->contents + h->plt.offset + 4);
3202 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3203 htab->splt->contents + h->plt.offset + 8);
3204 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3205 htab->splt->contents + h->plt.offset + 12);
3206 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3207 htab->splt->contents + h->plt.offset + 16);
3208 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3209 htab->splt->contents + h->plt.offset + 20);
3210 bfd_put_32 (output_bfd, (bfd_vma) 0,
3211 htab->splt->contents + h->plt.offset + 24);
3212 }
3213 else
3214 {
3215 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3216 htab->splt->contents + h->plt.offset);
3217 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3218 htab->splt->contents + h->plt.offset + 4);
3219 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3220 htab->splt->contents + h->plt.offset + 8);
3221 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3222 htab->splt->contents + h->plt.offset + 12);
3223 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3224 htab->splt->contents + h->plt.offset + 16);
3225 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3226 htab->splt->contents + h->plt.offset + 20);
3227 bfd_put_32 (output_bfd, got_offset,
3228 htab->splt->contents + h->plt.offset + 24);
3229 }
3230 /* Insert offset into reloc. table here. */
3231 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3232 htab->splt->contents + h->plt.offset + 28);
3233
3234 /* Fill in the entry in the global offset table.
3235 Points to instruction after GOT offset. */
3236 bfd_put_32 (output_bfd,
3237 (htab->splt->output_section->vma
3238 + htab->splt->output_offset
3239 + h->plt.offset
3240 + 12),
3241 htab->sgotplt->contents + got_offset);
3242
3243 /* Fill in the entry in the .rela.plt section. */
3244 rela.r_offset = (htab->sgotplt->output_section->vma
3245 + htab->sgotplt->output_offset
3246 + got_offset);
3247 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3248 rela.r_addend = 0;
3249 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3250 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3251
3252 if (!h->def_regular)
3253 {
3254 /* Mark the symbol as undefined, rather than as defined in
3255 the .plt section. Leave the value alone. This is a clue
3256 for the dynamic linker, to make function pointer
3257 comparisons work between an application and shared
3258 library. */
3259 sym->st_shndx = SHN_UNDEF;
3260 }
3261 }
3262
3263 if (h->got.offset != (bfd_vma) -1
3264 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3265 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3266 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3267 {
3268 Elf_Internal_Rela rela;
3269 bfd_byte *loc;
3270
3271 /* This symbol has an entry in the global offset table. Set it
3272 up. */
3273
3274 if (htab->sgot == NULL || htab->srelgot == NULL)
3275 abort ();
3276
3277 rela.r_offset = (htab->sgot->output_section->vma
3278 + htab->sgot->output_offset
3279 + (h->got.offset &~ (bfd_vma) 1));
3280
3281 /* If this is a static link, or it is a -Bsymbolic link and the
3282 symbol is defined locally or was forced to be local because
3283 of a version file, we just want to emit a RELATIVE reloc.
3284 The entry in the global offset table will already have been
3285 initialized in the relocate_section function. */
3286 if (info->shared
3287 && (info->symbolic
3288 || h->dynindx == -1
3289 || h->forced_local)
3290 && h->def_regular)
3291 {
3292 BFD_ASSERT((h->got.offset & 1) != 0);
3293 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3294 rela.r_addend = (h->root.u.def.value
3295 + h->root.u.def.section->output_section->vma
3296 + h->root.u.def.section->output_offset);
3297 }
3298 else
3299 {
3300 BFD_ASSERT((h->got.offset & 1) == 0);
3301 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3302 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3303 rela.r_addend = 0;
3304 }
3305
3306 loc = htab->srelgot->contents;
3307 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3308 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3309 }
3310
3311 if (h->needs_copy)
3312 {
3313 Elf_Internal_Rela rela;
3314 bfd_byte *loc;
3315
3316 /* This symbols needs a copy reloc. Set it up. */
3317
3318 if (h->dynindx == -1
3319 || (h->root.type != bfd_link_hash_defined
3320 && h->root.type != bfd_link_hash_defweak)
3321 || htab->srelbss == NULL)
3322 abort ();
3323
3324 rela.r_offset = (h->root.u.def.value
3325 + h->root.u.def.section->output_section->vma
3326 + h->root.u.def.section->output_offset);
3327 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3328 rela.r_addend = 0;
3329 loc = htab->srelbss->contents;
3330 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3331 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3332 }
3333
3334 /* Mark some specially defined symbols as absolute. */
3335 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3336 || h == htab->elf.hgot
3337 || h == htab->elf.hplt)
3338 sym->st_shndx = SHN_ABS;
3339
3340 return TRUE;
3341 }
3342
3343 /* Used to decide how to sort relocs in an optimal manner for the
3344 dynamic linker, before writing them out. */
3345
3346 static enum elf_reloc_type_class
elf_s390_reloc_type_class(rela)3347 elf_s390_reloc_type_class (rela)
3348 const Elf_Internal_Rela *rela;
3349 {
3350 switch ((int) ELF32_R_TYPE (rela->r_info))
3351 {
3352 case R_390_RELATIVE:
3353 return reloc_class_relative;
3354 case R_390_JMP_SLOT:
3355 return reloc_class_plt;
3356 case R_390_COPY:
3357 return reloc_class_copy;
3358 default:
3359 return reloc_class_normal;
3360 }
3361 }
3362
3363 /* Finish up the dynamic sections. */
3364
3365 static bfd_boolean
elf_s390_finish_dynamic_sections(output_bfd,info)3366 elf_s390_finish_dynamic_sections (output_bfd, info)
3367 bfd *output_bfd;
3368 struct bfd_link_info *info;
3369 {
3370 struct elf_s390_link_hash_table *htab;
3371 bfd *dynobj;
3372 asection *sdyn;
3373
3374 htab = elf_s390_hash_table (info);
3375 dynobj = htab->elf.dynobj;
3376 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3377
3378 if (htab->elf.dynamic_sections_created)
3379 {
3380 Elf32_External_Dyn *dyncon, *dynconend;
3381
3382 if (sdyn == NULL || htab->sgot == NULL)
3383 abort ();
3384
3385 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3386 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3387 for (; dyncon < dynconend; dyncon++)
3388 {
3389 Elf_Internal_Dyn dyn;
3390 asection *s;
3391
3392 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3393
3394 switch (dyn.d_tag)
3395 {
3396 default:
3397 continue;
3398
3399 case DT_PLTGOT:
3400 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3401 break;
3402
3403 case DT_JMPREL:
3404 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3405 break;
3406
3407 case DT_PLTRELSZ:
3408 s = htab->srelplt->output_section;
3409 dyn.d_un.d_val = s->size;
3410 break;
3411 }
3412
3413 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3414 }
3415
3416 /* Fill in the special first entry in the procedure linkage table. */
3417 if (htab->splt && htab->splt->size > 0)
3418 {
3419 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3420 if (info->shared)
3421 {
3422 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3423 htab->splt->contents );
3424 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3425 htab->splt->contents +4 );
3426 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3427 htab->splt->contents +8 );
3428 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3429 htab->splt->contents +12 );
3430 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3431 htab->splt->contents +16 );
3432 }
3433 else
3434 {
3435 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3436 htab->splt->contents );
3437 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3438 htab->splt->contents +4 );
3439 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3440 htab->splt->contents +8 );
3441 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3442 htab->splt->contents +12 );
3443 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3444 htab->splt->contents +16 );
3445 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3446 htab->splt->contents +20 );
3447 bfd_put_32 (output_bfd,
3448 htab->sgotplt->output_section->vma
3449 + htab->sgotplt->output_offset,
3450 htab->splt->contents + 24);
3451 }
3452 elf_section_data (htab->splt->output_section)
3453 ->this_hdr.sh_entsize = 4;
3454 }
3455
3456 }
3457
3458 if (htab->sgotplt)
3459 {
3460 /* Fill in the first three entries in the global offset table. */
3461 if (htab->sgotplt->size > 0)
3462 {
3463 bfd_put_32 (output_bfd,
3464 (sdyn == NULL ? (bfd_vma) 0
3465 : sdyn->output_section->vma + sdyn->output_offset),
3466 htab->sgotplt->contents);
3467 /* One entry for shared object struct ptr. */
3468 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3469 /* One entry for _dl_runtime_resolve. */
3470 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3471 }
3472
3473 elf_section_data (htab->sgotplt->output_section)
3474 ->this_hdr.sh_entsize = 4;
3475 }
3476 return TRUE;
3477 }
3478
3479 static bfd_boolean
elf_s390_grok_prstatus(abfd,note)3480 elf_s390_grok_prstatus (abfd, note)
3481 bfd * abfd;
3482 Elf_Internal_Note * note;
3483 {
3484 int offset;
3485 unsigned int size;
3486
3487 switch (note->descsz)
3488 {
3489 default:
3490 return FALSE;
3491
3492 case 224: /* S/390 Linux. */
3493 /* pr_cursig */
3494 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3495
3496 /* pr_pid */
3497 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3498
3499 /* pr_reg */
3500 offset = 72;
3501 size = 144;
3502 break;
3503 }
3504
3505 /* Make a ".reg/999" section. */
3506 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3507 size, note->descpos + offset);
3508 }
3509
3510 /* Return address for Ith PLT stub in section PLT, for relocation REL
3511 or (bfd_vma) -1 if it should not be included. */
3512
3513 static bfd_vma
elf_s390_plt_sym_val(bfd_vma i,const asection * plt,const arelent * rel ATTRIBUTE_UNUSED)3514 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3515 const arelent *rel ATTRIBUTE_UNUSED)
3516 {
3517 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3518 }
3519
3520
3521 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3522 #define TARGET_BIG_NAME "elf32-s390"
3523 #define ELF_ARCH bfd_arch_s390
3524 #define ELF_MACHINE_CODE EM_S390
3525 #define ELF_MACHINE_ALT1 EM_S390_OLD
3526 #define ELF_MAXPAGESIZE 0x1000
3527
3528 #define elf_backend_can_gc_sections 1
3529 #define elf_backend_can_refcount 1
3530 #define elf_backend_want_got_plt 1
3531 #define elf_backend_plt_readonly 1
3532 #define elf_backend_want_plt_sym 0
3533 #define elf_backend_got_header_size 12
3534 #define elf_backend_rela_normal 1
3535
3536 #define elf_info_to_howto elf_s390_info_to_howto
3537
3538 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3539 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3540 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3541 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3542
3543 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3544 #define elf_backend_check_relocs elf_s390_check_relocs
3545 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3546 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3547 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3548 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3549 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3550 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3551 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3552 #define elf_backend_relocate_section elf_s390_relocate_section
3553 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3554 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3555 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3556 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3557 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3558
3559 #define bfd_elf32_mkobject elf_s390_mkobject
3560 #define elf_backend_object_p elf_s390_object_p
3561
3562 #include "elf32-target.h"
3563