projects / deliverable / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* libbfd-in.h (bfd_malloc2, bfd_realloc2, bfd_zmalloc2, bfd_alloc2,
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005
3 Free Software Foundation, Inc.
4 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 static asection *elf_s390_gc_mark_hook
50 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
51 struct elf_link_hash_entry *, Elf_Internal_Sym *));
52 static bfd_boolean elf_s390_gc_sweep_hook
53 PARAMS ((bfd *, struct bfd_link_info *, asection *,
54 const Elf_Internal_Rela *));
55 struct elf_s390_link_hash_entry;
56 static void elf_s390_adjust_gotplt
57 PARAMS ((struct elf_s390_link_hash_entry *));
58 static bfd_boolean elf_s390_adjust_dynamic_symbol
59 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
60 static bfd_boolean allocate_dynrelocs
61 PARAMS ((struct elf_link_hash_entry *, PTR));
62 static bfd_boolean readonly_dynrelocs
63 PARAMS ((struct elf_link_hash_entry *, PTR));
64 static bfd_boolean elf_s390_size_dynamic_sections
65 PARAMS ((bfd *, struct bfd_link_info *));
66 static bfd_boolean elf_s390_relocate_section
67 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
68 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
69 static bfd_boolean elf_s390_finish_dynamic_symbol
70 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
71 Elf_Internal_Sym *));
72 static enum elf_reloc_type_class elf_s390_reloc_type_class
73 PARAMS ((const Elf_Internal_Rela *));
74 static bfd_boolean elf_s390_finish_dynamic_sections
75 PARAMS ((bfd *, struct bfd_link_info *));
76 static bfd_boolean elf_s390_mkobject
77 PARAMS ((bfd *));
78 static bfd_boolean elf_s390_object_p
79 PARAMS ((bfd *));
80 static bfd_boolean elf_s390_grok_prstatus
81 PARAMS ((bfd *, Elf_Internal_Note *));
82 static int elf_s390_tls_transition
83 PARAMS ((struct bfd_link_info *, int, int));
84 static bfd_reloc_status_type s390_tls_reloc
85 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
86 static bfd_vma dtpoff_base
87 PARAMS ((struct bfd_link_info *));
88 static bfd_vma tpoff
89 PARAMS ((struct bfd_link_info *, bfd_vma));
90 static void invalid_tls_insn
91 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
92 static bfd_reloc_status_type s390_elf_ldisp_reloc
93 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
94
95 #include "elf/s390.h"
96
97 /* The relocation "howto" table. */
98
99 static reloc_howto_type elf_howto_table[] =
100 {
101 HOWTO (R_390_NONE, /* type */
102 0, /* rightshift */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
104 0, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_dont, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_390_NONE", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
117 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
118 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
121 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
123 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
125 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
127 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
131 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
133 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
135 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
137 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
139 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
141 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
143 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
145 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
151 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
157 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
158 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
159 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
160 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
161 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
163 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
165 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
166 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
167 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
168 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
170 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
172 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
173 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
175 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
177 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
179 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
180 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
185 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
186 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
187 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
188 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
189 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
191 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
192 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
193 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
194 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
196 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
197 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
198 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
199 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
200 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
202 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
204 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
205 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
207 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
208 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
214 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
220 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
221 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
222 };
223
224 /* GNU extension to record C++ vtable hierarchy. */
225 static reloc_howto_type elf32_s390_vtinherit_howto =
226 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
227 static reloc_howto_type elf32_s390_vtentry_howto =
228 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
229
230 static reloc_howto_type *
231 elf_s390_reloc_type_lookup (abfd, code)
232 bfd *abfd ATTRIBUTE_UNUSED;
233 bfd_reloc_code_real_type code;
234 {
235 switch (code)
236 {
237 case BFD_RELOC_NONE:
238 return &elf_howto_table[(int) R_390_NONE];
239 case BFD_RELOC_8:
240 return &elf_howto_table[(int) R_390_8];
241 case BFD_RELOC_390_12:
242 return &elf_howto_table[(int) R_390_12];
243 case BFD_RELOC_16:
244 return &elf_howto_table[(int) R_390_16];
245 case BFD_RELOC_32:
246 return &elf_howto_table[(int) R_390_32];
247 case BFD_RELOC_CTOR:
248 return &elf_howto_table[(int) R_390_32];
249 case BFD_RELOC_32_PCREL:
250 return &elf_howto_table[(int) R_390_PC32];
251 case BFD_RELOC_390_GOT12:
252 return &elf_howto_table[(int) R_390_GOT12];
253 case BFD_RELOC_32_GOT_PCREL:
254 return &elf_howto_table[(int) R_390_GOT32];
255 case BFD_RELOC_390_PLT32:
256 return &elf_howto_table[(int) R_390_PLT32];
257 case BFD_RELOC_390_COPY:
258 return &elf_howto_table[(int) R_390_COPY];
259 case BFD_RELOC_390_GLOB_DAT:
260 return &elf_howto_table[(int) R_390_GLOB_DAT];
261 case BFD_RELOC_390_JMP_SLOT:
262 return &elf_howto_table[(int) R_390_JMP_SLOT];
263 case BFD_RELOC_390_RELATIVE:
264 return &elf_howto_table[(int) R_390_RELATIVE];
265 case BFD_RELOC_32_GOTOFF:
266 return &elf_howto_table[(int) R_390_GOTOFF32];
267 case BFD_RELOC_390_GOTPC:
268 return &elf_howto_table[(int) R_390_GOTPC];
269 case BFD_RELOC_390_GOT16:
270 return &elf_howto_table[(int) R_390_GOT16];
271 case BFD_RELOC_16_PCREL:
272 return &elf_howto_table[(int) R_390_PC16];
273 case BFD_RELOC_390_PC16DBL:
274 return &elf_howto_table[(int) R_390_PC16DBL];
275 case BFD_RELOC_390_PLT16DBL:
276 return &elf_howto_table[(int) R_390_PLT16DBL];
277 case BFD_RELOC_390_PC32DBL:
278 return &elf_howto_table[(int) R_390_PC32DBL];
279 case BFD_RELOC_390_PLT32DBL:
280 return &elf_howto_table[(int) R_390_PLT32DBL];
281 case BFD_RELOC_390_GOTPCDBL:
282 return &elf_howto_table[(int) R_390_GOTPCDBL];
283 case BFD_RELOC_390_GOTENT:
284 return &elf_howto_table[(int) R_390_GOTENT];
285 case BFD_RELOC_16_GOTOFF:
286 return &elf_howto_table[(int) R_390_GOTOFF16];
287 case BFD_RELOC_390_GOTPLT12:
288 return &elf_howto_table[(int) R_390_GOTPLT12];
289 case BFD_RELOC_390_GOTPLT16:
290 return &elf_howto_table[(int) R_390_GOTPLT16];
291 case BFD_RELOC_390_GOTPLT32:
292 return &elf_howto_table[(int) R_390_GOTPLT32];
293 case BFD_RELOC_390_GOTPLTENT:
294 return &elf_howto_table[(int) R_390_GOTPLTENT];
295 case BFD_RELOC_390_PLTOFF16:
296 return &elf_howto_table[(int) R_390_PLTOFF16];
297 case BFD_RELOC_390_PLTOFF32:
298 return &elf_howto_table[(int) R_390_PLTOFF32];
299 case BFD_RELOC_390_TLS_LOAD:
300 return &elf_howto_table[(int) R_390_TLS_LOAD];
301 case BFD_RELOC_390_TLS_GDCALL:
302 return &elf_howto_table[(int) R_390_TLS_GDCALL];
303 case BFD_RELOC_390_TLS_LDCALL:
304 return &elf_howto_table[(int) R_390_TLS_LDCALL];
305 case BFD_RELOC_390_TLS_GD32:
306 return &elf_howto_table[(int) R_390_TLS_GD32];
307 case BFD_RELOC_390_TLS_GOTIE12:
308 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
309 case BFD_RELOC_390_TLS_GOTIE32:
310 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
311 case BFD_RELOC_390_TLS_LDM32:
312 return &elf_howto_table[(int) R_390_TLS_LDM32];
313 case BFD_RELOC_390_TLS_IE32:
314 return &elf_howto_table[(int) R_390_TLS_IE32];
315 case BFD_RELOC_390_TLS_IEENT:
316 return &elf_howto_table[(int) R_390_TLS_IEENT];
317 case BFD_RELOC_390_TLS_LE32:
318 return &elf_howto_table[(int) R_390_TLS_LE32];
319 case BFD_RELOC_390_TLS_LDO32:
320 return &elf_howto_table[(int) R_390_TLS_LDO32];
321 case BFD_RELOC_390_TLS_DTPMOD:
322 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
323 case BFD_RELOC_390_TLS_DTPOFF:
324 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
325 case BFD_RELOC_390_TLS_TPOFF:
326 return &elf_howto_table[(int) R_390_TLS_TPOFF];
327 case BFD_RELOC_390_20:
328 return &elf_howto_table[(int) R_390_20];
329 case BFD_RELOC_390_GOT20:
330 return &elf_howto_table[(int) R_390_GOT20];
331 case BFD_RELOC_390_GOTPLT20:
332 return &elf_howto_table[(int) R_390_GOTPLT20];
333 case BFD_RELOC_390_TLS_GOTIE20:
334 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
335 case BFD_RELOC_VTABLE_INHERIT:
336 return &elf32_s390_vtinherit_howto;
337 case BFD_RELOC_VTABLE_ENTRY:
338 return &elf32_s390_vtentry_howto;
339 default:
340 break;
341 }
342 return 0;
343 }
344
345 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
346 and elf32-s390.c has its own copy. */
347
348 static void
349 elf_s390_info_to_howto (abfd, cache_ptr, dst)
350 bfd *abfd ATTRIBUTE_UNUSED;
351 arelent *cache_ptr;
352 Elf_Internal_Rela *dst;
353 {
354 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
355 switch (r_type)
356 {
357 case R_390_GNU_VTINHERIT:
358 cache_ptr->howto = &elf32_s390_vtinherit_howto;
359 break;
360
361 case R_390_GNU_VTENTRY:
362 cache_ptr->howto = &elf32_s390_vtentry_howto;
363 break;
364
365 default:
366 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
367 {
368 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
369 abfd, (int) r_type);
370 r_type = R_390_NONE;
371 }
372 cache_ptr->howto = &elf_howto_table[r_type];
373 }
374 }
375
376 /* A relocation function which doesn't do anything. */
377 static bfd_reloc_status_type
378 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
379 output_bfd, error_message)
380 bfd *abfd ATTRIBUTE_UNUSED;
381 arelent *reloc_entry;
382 asymbol *symbol ATTRIBUTE_UNUSED;
383 PTR data ATTRIBUTE_UNUSED;
384 asection *input_section;
385 bfd *output_bfd;
386 char **error_message ATTRIBUTE_UNUSED;
387 {
388 if (output_bfd)
389 reloc_entry->address += input_section->output_offset;
390 return bfd_reloc_ok;
391 }
392
393 /* Handle the large displacement relocs. */
394 static bfd_reloc_status_type
395 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
396 output_bfd, error_message)
397 bfd *abfd ATTRIBUTE_UNUSED;
398 arelent *reloc_entry;
399 asymbol *symbol;
400 PTR data ATTRIBUTE_UNUSED;
401 asection *input_section;
402 bfd *output_bfd;
403 char **error_message ATTRIBUTE_UNUSED;
404 {
405 reloc_howto_type *howto = reloc_entry->howto;
406 bfd_vma relocation;
407 bfd_vma insn;
408
409 if (output_bfd != (bfd *) NULL
410 && (symbol->flags & BSF_SECTION_SYM) == 0
411 && (! howto->partial_inplace
412 || reloc_entry->addend == 0))
413 {
414 reloc_entry->address += input_section->output_offset;
415 return bfd_reloc_ok;
416 }
417
418 if (output_bfd != NULL)
419 return bfd_reloc_continue;
420
421 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
422 return bfd_reloc_outofrange;
423
424 relocation = (symbol->value
425 + symbol->section->output_section->vma
426 + symbol->section->output_offset);
427 relocation += reloc_entry->addend;
428 if (howto->pc_relative)
429 {
430 relocation -= (input_section->output_section->vma
431 + input_section->output_offset);
432 relocation -= reloc_entry->address;
433 }
434
435 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
436 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
437 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
438
439 if ((bfd_signed_vma) relocation < - 0x80000
440 || (bfd_signed_vma) relocation > 0x7ffff)
441 return bfd_reloc_overflow;
442 else
443 return bfd_reloc_ok;
444 }
445
446 static bfd_boolean
447 elf_s390_is_local_label_name (abfd, name)
448 bfd *abfd;
449 const char *name;
450 {
451 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
452 return TRUE;
453
454 return _bfd_elf_is_local_label_name (abfd, name);
455 }
456
457 /* Functions for the 390 ELF linker. */
458
459 /* The name of the dynamic interpreter. This is put in the .interp
460 section. */
461
462 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
463
464 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
465 copying dynamic variables from a shared lib into an app's dynbss
466 section, and instead use a dynamic relocation to point into the
467 shared lib. */
468 #define ELIMINATE_COPY_RELOCS 1
469
470 /* The size in bytes of the first entry in the procedure linkage table. */
471 #define PLT_FIRST_ENTRY_SIZE 32
472 /* The size in bytes of an entry in the procedure linkage table. */
473 #define PLT_ENTRY_SIZE 32
474
475 #define GOT_ENTRY_SIZE 4
476
477 /* The first three entries in a procedure linkage table are reserved,
478 and the initial contents are unimportant (we zero them out).
479 Subsequent entries look like this. See the SVR4 ABI 386
480 supplement to see how this works. */
481
482 /* For the s390, simple addr offset can only be 0 - 4096.
483 To use the full 2 GB address space, several instructions
484 are needed to load an address in a register and execute
485 a branch( or just saving the address)
486
487 Furthermore, only r 0 and 1 are free to use!!! */
488
489 /* The first 3 words in the GOT are then reserved.
490 Word 0 is the address of the dynamic table.
491 Word 1 is a pointer to a structure describing the object
492 Word 2 is used to point to the loader entry address.
493
494 The code for position independent PLT entries looks like this:
495
496 r12 holds addr of the current GOT at entry to the PLT
497
498 The GOT holds the address in the PLT to be executed.
499 The loader then gets:
500 24(15) = Pointer to the structure describing the object.
501 28(15) = Offset in symbol table
502
503 The loader must then find the module where the function is
504 and insert the address in the GOT.
505
506 Note: 390 can only address +- 64 K relative.
507 We check if offset > 65536, then make a relative branch -64xxx
508 back to a previous defined branch
509
510 PLT1: BASR 1,0 # 2 bytes
511 L 1,22(1) # 4 bytes Load offset in GOT in r 1
512 L 1,(1,12) # 4 bytes Load address from GOT in r1
513 BCR 15,1 # 2 bytes Jump to address
514 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
515 L 1,14(1) # 4 bytes Load offset in symol table in r1
516 BRC 15,-x # 4 bytes Jump to start of PLT
517 .word 0 # 2 bytes filler
518 .long ? # 4 bytes offset in GOT
519 .long ? # 4 bytes offset into symbol table
520
521 This was the general case. There are two additional, optimizes PLT
522 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
523 First the one for GOT offsets < 4096:
524
525 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
526 BCR 15,1 # 2 bytes Jump to address
527 .word 0,0,0 # 6 bytes filler
528 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
529 L 1,14(1) # 4 bytes Load offset in symbol table in r1
530 BRC 15,-x # 4 bytes Jump to start of PLT
531 .word 0,0,0 # 6 bytes filler
532 .long ? # 4 bytes offset into symbol table
533
534 Second the one for GOT offsets < 32768:
535
536 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
537 L 1,(1,12) # 4 bytes Load address from GOT to r1
538 BCR 15,1 # 2 bytes Jump to address
539 .word 0 # 2 bytes filler
540 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
541 L 1,14(1) # 4 bytes Load offset in symbol table in r1
542 BRC 15,-x # 4 bytes Jump to start of PLT
543 .word 0,0,0 # 6 bytes filler
544 .long ? # 4 bytes offset into symbol table
545
546 Total = 32 bytes per PLT entry
547
548 The code for static build PLT entries looks like this:
549
550 PLT1: BASR 1,0 # 2 bytes
551 L 1,22(1) # 4 bytes Load address of GOT entry
552 L 1,0(0,1) # 4 bytes Load address from GOT in r1
553 BCR 15,1 # 2 bytes Jump to address
554 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
555 L 1,14(1) # 4 bytes Load offset in symbol table in r1
556 BRC 15,-x # 4 bytes Jump to start of PLT
557 .word 0 # 2 bytes filler
558 .long ? # 4 bytes address of GOT entry
559 .long ? # 4 bytes offset into symbol table */
560
561 #define PLT_PIC_ENTRY_WORD0 0x0d105810
562 #define PLT_PIC_ENTRY_WORD1 0x10165811
563 #define PLT_PIC_ENTRY_WORD2 0xc00007f1
564 #define PLT_PIC_ENTRY_WORD3 0x0d105810
565 #define PLT_PIC_ENTRY_WORD4 0x100ea7f4
566
567 #define PLT_PIC12_ENTRY_WORD0 0x5810c000
568 #define PLT_PIC12_ENTRY_WORD1 0x07f10000
569 #define PLT_PIC12_ENTRY_WORD2 0x00000000
570 #define PLT_PIC12_ENTRY_WORD3 0x0d105810
571 #define PLT_PIC12_ENTRY_WORD4 0x100ea7f4
572
573 #define PLT_PIC16_ENTRY_WORD0 0xa7180000
574 #define PLT_PIC16_ENTRY_WORD1 0x5811c000
575 #define PLT_PIC16_ENTRY_WORD2 0x07f10000
576 #define PLT_PIC16_ENTRY_WORD3 0x0d105810
577 #define PLT_PIC16_ENTRY_WORD4 0x100ea7f4
578
579 #define PLT_ENTRY_WORD0 0x0d105810
580 #define PLT_ENTRY_WORD1 0x10165810
581 #define PLT_ENTRY_WORD2 0x100007f1
582 #define PLT_ENTRY_WORD3 0x0d105810
583 #define PLT_ENTRY_WORD4 0x100ea7f4
584
585 /* The first PLT entry pushes the offset into the symbol table
586 from R1 onto the stack at 8(15) and the loader object info
587 at 12(15), loads the loader address in R1 and jumps to it. */
588
589 /* The first entry in the PLT for PIC code:
590
591 PLT0:
592 ST 1,28(15) # R1 has offset into symbol table
593 L 1,4(12) # Get loader ino(object struct address)
594 ST 1,24(15) # Store address
595 L 1,8(12) # Entry address of loader in R1
596 BR 1 # Jump to loader
597
598 The first entry in the PLT for static code:
599
600 PLT0:
601 ST 1,28(15) # R1 has offset into symbol table
602 BASR 1,0
603 L 1,18(0,1) # Get address of GOT
604 MVC 24(4,15),4(1) # Move loader ino to stack
605 L 1,8(1) # Get address of loader
606 BR 1 # Jump to loader
607 .word 0 # filler
608 .long got # address of GOT */
609
610 #define PLT_PIC_FIRST_ENTRY_WORD0 0x5010f01c
611 #define PLT_PIC_FIRST_ENTRY_WORD1 0x5810c004
612 #define PLT_PIC_FIRST_ENTRY_WORD2 0x5010f018
613 #define PLT_PIC_FIRST_ENTRY_WORD3 0x5810c008
614 #define PLT_PIC_FIRST_ENTRY_WORD4 0x07f10000
615
616 #define PLT_FIRST_ENTRY_WORD0 0x5010f01c
617 #define PLT_FIRST_ENTRY_WORD1 0x0d105810
618 #define PLT_FIRST_ENTRY_WORD2 0x1012D203
619 #define PLT_FIRST_ENTRY_WORD3 0xf0181004
620 #define PLT_FIRST_ENTRY_WORD4 0x58101008
621 #define PLT_FIRST_ENTRY_WORD5 0x07f10000
622
623 /* The s390 linker needs to keep track of the number of relocs that it
624 decides to copy as dynamic relocs in check_relocs for each symbol.
625 This is so that it can later discard them if they are found to be
626 unnecessary. We store the information in a field extending the
627 regular ELF linker hash table. */
628
629 struct elf_s390_dyn_relocs
630 {
631 struct elf_s390_dyn_relocs *next;
632
633 /* The input section of the reloc. */
634 asection *sec;
635
636 /* Total number of relocs copied for the input section. */
637 bfd_size_type count;
638
639 /* Number of pc-relative relocs copied for the input section. */
640 bfd_size_type pc_count;
641 };
642
643 /* s390 ELF linker hash entry. */
644
645 struct elf_s390_link_hash_entry
646 {
647 struct elf_link_hash_entry elf;
648
649 /* Track dynamic relocs copied for this symbol. */
650 struct elf_s390_dyn_relocs *dyn_relocs;
651
652 /* Number of GOTPLT references for a function. */
653 bfd_signed_vma gotplt_refcount;
654
655 #define GOT_UNKNOWN 0
656 #define GOT_NORMAL 1
657 #define GOT_TLS_GD 2
658 #define GOT_TLS_IE 3
659 #define GOT_TLS_IE_NLT 4
660 unsigned char tls_type;
661 };
662
663 #define elf_s390_hash_entry(ent) \
664 ((struct elf_s390_link_hash_entry *)(ent))
665
666 struct elf_s390_obj_tdata
667 {
668 struct elf_obj_tdata root;
669
670 /* tls_type for each local got entry. */
671 char *local_got_tls_type;
672 };
673
674 #define elf_s390_tdata(abfd) \
675 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
676
677 #define elf_s390_local_got_tls_type(abfd) \
678 (elf_s390_tdata (abfd)->local_got_tls_type)
679
680 static bfd_boolean
681 elf_s390_mkobject (abfd)
682 bfd *abfd;
683 {
684 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
685 abfd->tdata.any = bfd_zalloc (abfd, amt);
686 if (abfd->tdata.any == NULL)
687 return FALSE;
688 return TRUE;
689 }
690
691 static bfd_boolean
692 elf_s390_object_p (abfd)
693 bfd *abfd;
694 {
695 /* Set the right machine number for an s390 elf32 file. */
696 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
697 }
698
699 /* s390 ELF linker hash table. */
700
701 struct elf_s390_link_hash_table
702 {
703 struct elf_link_hash_table elf;
704
705 /* Short-cuts to get to dynamic linker sections. */
706 asection *sgot;
707 asection *sgotplt;
708 asection *srelgot;
709 asection *splt;
710 asection *srelplt;
711 asection *sdynbss;
712 asection *srelbss;
713
714 union {
715 bfd_signed_vma refcount;
716 bfd_vma offset;
717 } tls_ldm_got;
718
719 /* Small local sym to section mapping cache. */
720 struct sym_sec_cache sym_sec;
721 };
722
723 /* Get the s390 ELF linker hash table from a link_info structure. */
724
725 #define elf_s390_hash_table(p) \
726 ((struct elf_s390_link_hash_table *) ((p)->hash))
727
728 /* Create an entry in an s390 ELF linker hash table. */
729
730 static struct bfd_hash_entry *
731 link_hash_newfunc (entry, table, string)
732 struct bfd_hash_entry *entry;
733 struct bfd_hash_table *table;
734 const char *string;
735 {
736 /* Allocate the structure if it has not already been allocated by a
737 subclass. */
738 if (entry == NULL)
739 {
740 entry = bfd_hash_allocate (table,
741 sizeof (struct elf_s390_link_hash_entry));
742 if (entry == NULL)
743 return entry;
744 }
745
746 /* Call the allocation method of the superclass. */
747 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
748 if (entry != NULL)
749 {
750 struct elf_s390_link_hash_entry *eh;
751
752 eh = (struct elf_s390_link_hash_entry *) entry;
753 eh->dyn_relocs = NULL;
754 eh->gotplt_refcount = 0;
755 eh->tls_type = GOT_UNKNOWN;
756 }
757
758 return entry;
759 }
760
761 /* Create an s390 ELF linker hash table. */
762
763 static struct bfd_link_hash_table *
764 elf_s390_link_hash_table_create (abfd)
765 bfd *abfd;
766 {
767 struct elf_s390_link_hash_table *ret;
768 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
769
770 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
771 if (ret == NULL)
772 return NULL;
773
774 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
775 {
776 free (ret);
777 return NULL;
778 }
779
780 ret->sgot = NULL;
781 ret->sgotplt = NULL;
782 ret->srelgot = NULL;
783 ret->splt = NULL;
784 ret->srelplt = NULL;
785 ret->sdynbss = NULL;
786 ret->srelbss = NULL;
787 ret->tls_ldm_got.refcount = 0;
788 ret->sym_sec.abfd = NULL;
789
790 return &ret->elf.root;
791 }
792
793 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
794 shortcuts to them in our hash table. */
795
796 static bfd_boolean
797 create_got_section (dynobj, info)
798 bfd *dynobj;
799 struct bfd_link_info *info;
800 {
801 struct elf_s390_link_hash_table *htab;
802
803 if (! _bfd_elf_create_got_section (dynobj, info))
804 return FALSE;
805
806 htab = elf_s390_hash_table (info);
807 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
808 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
809 if (!htab->sgot || !htab->sgotplt)
810 abort ();
811
812 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
813 (SEC_ALLOC | SEC_LOAD
814 | SEC_HAS_CONTENTS
815 | SEC_IN_MEMORY
816 | SEC_LINKER_CREATED
817 | SEC_READONLY));
818 if (htab->srelgot == NULL
819 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2))
820 return FALSE;
821 return TRUE;
822 }
823
824 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
825 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
826 hash table. */
827
828 static bfd_boolean
829 elf_s390_create_dynamic_sections (dynobj, info)
830 bfd *dynobj;
831 struct bfd_link_info *info;
832 {
833 struct elf_s390_link_hash_table *htab;
834
835 htab = elf_s390_hash_table (info);
836 if (!htab->sgot && !create_got_section (dynobj, info))
837 return FALSE;
838
839 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
840 return FALSE;
841
842 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
843 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
844 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
845 if (!info->shared)
846 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
847
848 if (!htab->splt || !htab->srelplt || !htab->sdynbss
849 || (!info->shared && !htab->srelbss))
850 abort ();
851
852 return TRUE;
853 }
854
855 /* Copy the extra info we tack onto an elf_link_hash_entry. */
856
857 static void
858 elf_s390_copy_indirect_symbol (bed, dir, ind)
859 const struct elf_backend_data *bed;
860 struct elf_link_hash_entry *dir, *ind;
861 {
862 struct elf_s390_link_hash_entry *edir, *eind;
863
864 edir = (struct elf_s390_link_hash_entry *) dir;
865 eind = (struct elf_s390_link_hash_entry *) ind;
866
867 if (eind->dyn_relocs != NULL)
868 {
869 if (edir->dyn_relocs != NULL)
870 {
871 struct elf_s390_dyn_relocs **pp;
872 struct elf_s390_dyn_relocs *p;
873
874 if (ind->root.type == bfd_link_hash_indirect)
875 abort ();
876
877 /* Add reloc counts against the weak sym to the strong sym
878 list. Merge any entries against the same section. */
879 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
880 {
881 struct elf_s390_dyn_relocs *q;
882
883 for (q = edir->dyn_relocs; q != NULL; q = q->next)
884 if (q->sec == p->sec)
885 {
886 q->pc_count += p->pc_count;
887 q->count += p->count;
888 *pp = p->next;
889 break;
890 }
891 if (q == NULL)
892 pp = &p->next;
893 }
894 *pp = edir->dyn_relocs;
895 }
896
897 edir->dyn_relocs = eind->dyn_relocs;
898 eind->dyn_relocs = NULL;
899 }
900
901 if (ind->root.type == bfd_link_hash_indirect
902 && dir->got.refcount <= 0)
903 {
904 edir->tls_type = eind->tls_type;
905 eind->tls_type = GOT_UNKNOWN;
906 }
907
908 if (ELIMINATE_COPY_RELOCS
909 && ind->root.type != bfd_link_hash_indirect
910 && dir->dynamic_adjusted)
911 {
912 /* If called to transfer flags for a weakdef during processing
913 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
914 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
915 dir->ref_dynamic |= ind->ref_dynamic;
916 dir->ref_regular |= ind->ref_regular;
917 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
918 dir->needs_plt |= ind->needs_plt;
919 }
920 else
921 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
922 }
923
924 static int
925 elf_s390_tls_transition (info, r_type, is_local)
926 struct bfd_link_info *info;
927 int r_type;
928 int is_local;
929 {
930 if (info->shared)
931 return r_type;
932
933 switch (r_type)
934 {
935 case R_390_TLS_GD32:
936 case R_390_TLS_IE32:
937 if (is_local)
938 return R_390_TLS_LE32;
939 return R_390_TLS_IE32;
940 case R_390_TLS_GOTIE32:
941 if (is_local)
942 return R_390_TLS_LE32;
943 return R_390_TLS_GOTIE32;
944 case R_390_TLS_LDM32:
945 return R_390_TLS_LE32;
946 }
947
948 return r_type;
949 }
950
951 /* Look through the relocs for a section during the first phase, and
952 allocate space in the global offset table or procedure linkage
953 table. */
954
955 static bfd_boolean
956 elf_s390_check_relocs (abfd, info, sec, relocs)
957 bfd *abfd;
958 struct bfd_link_info *info;
959 asection *sec;
960 const Elf_Internal_Rela *relocs;
961 {
962 struct elf_s390_link_hash_table *htab;
963 Elf_Internal_Shdr *symtab_hdr;
964 struct elf_link_hash_entry **sym_hashes;
965 const Elf_Internal_Rela *rel;
966 const Elf_Internal_Rela *rel_end;
967 asection *sreloc;
968 bfd_signed_vma *local_got_refcounts;
969 int tls_type, old_tls_type;
970
971 if (info->relocatable)
972 return TRUE;
973
974 htab = elf_s390_hash_table (info);
975 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
976 sym_hashes = elf_sym_hashes (abfd);
977 local_got_refcounts = elf_local_got_refcounts (abfd);
978
979 sreloc = NULL;
980
981 rel_end = relocs + sec->reloc_count;
982 for (rel = relocs; rel < rel_end; rel++)
983 {
984 unsigned int r_type;
985 unsigned long r_symndx;
986 struct elf_link_hash_entry *h;
987
988 r_symndx = ELF32_R_SYM (rel->r_info);
989
990 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
991 {
992 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
993 abfd, r_symndx);
994 return FALSE;
995 }
996
997 if (r_symndx < symtab_hdr->sh_info)
998 h = NULL;
999 else
1000 {
1001 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1002 while (h->root.type == bfd_link_hash_indirect
1003 || h->root.type == bfd_link_hash_warning)
1004 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1005 }
1006
1007 /* Create got section and local_got_refcounts array if they
1008 are needed. */
1009 r_type = elf_s390_tls_transition (info,
1010 ELF32_R_TYPE (rel->r_info),
1011 h == NULL);
1012 switch (r_type)
1013 {
1014 case R_390_GOT12:
1015 case R_390_GOT16:
1016 case R_390_GOT20:
1017 case R_390_GOT32:
1018 case R_390_GOTENT:
1019 case R_390_GOTPLT12:
1020 case R_390_GOTPLT16:
1021 case R_390_GOTPLT20:
1022 case R_390_GOTPLT32:
1023 case R_390_GOTPLTENT:
1024 case R_390_TLS_GD32:
1025 case R_390_TLS_GOTIE12:
1026 case R_390_TLS_GOTIE20:
1027 case R_390_TLS_GOTIE32:
1028 case R_390_TLS_IEENT:
1029 case R_390_TLS_IE32:
1030 case R_390_TLS_LDM32:
1031 if (h == NULL
1032 && local_got_refcounts == NULL)
1033 {
1034 bfd_size_type size;
1035
1036 size = symtab_hdr->sh_info;
1037 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1038 local_got_refcounts = ((bfd_signed_vma *)
1039 bfd_zalloc (abfd, size));
1040 if (local_got_refcounts == NULL)
1041 return FALSE;
1042 elf_local_got_refcounts (abfd) = local_got_refcounts;
1043 elf_s390_local_got_tls_type (abfd)
1044 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1045 }
1046 /* Fall through. */
1047 case R_390_GOTOFF16:
1048 case R_390_GOTOFF32:
1049 case R_390_GOTPC:
1050 case R_390_GOTPCDBL:
1051 if (htab->sgot == NULL)
1052 {
1053 if (htab->elf.dynobj == NULL)
1054 htab->elf.dynobj = abfd;
1055 if (!create_got_section (htab->elf.dynobj, info))
1056 return FALSE;
1057 }
1058 }
1059
1060 switch (r_type)
1061 {
1062 case R_390_GOTOFF16:
1063 case R_390_GOTOFF32:
1064 case R_390_GOTPC:
1065 case R_390_GOTPCDBL:
1066 /* Got is created, nothing to be done. */
1067 break;
1068
1069 case R_390_PLT16DBL:
1070 case R_390_PLT32DBL:
1071 case R_390_PLT32:
1072 case R_390_PLTOFF16:
1073 case R_390_PLTOFF32:
1074 /* This symbol requires a procedure linkage table entry. We
1075 actually build the entry in adjust_dynamic_symbol,
1076 because this might be a case of linking PIC code which is
1077 never referenced by a dynamic object, in which case we
1078 don't need to generate a procedure linkage table entry
1079 after all. */
1080
1081 /* If this is a local symbol, we resolve it directly without
1082 creating a procedure linkage table entry. */
1083 if (h != NULL)
1084 {
1085 h->needs_plt = 1;
1086 h->plt.refcount += 1;
1087 }
1088 break;
1089
1090 case R_390_GOTPLT12:
1091 case R_390_GOTPLT16:
1092 case R_390_GOTPLT20:
1093 case R_390_GOTPLT32:
1094 case R_390_GOTPLTENT:
1095 /* This symbol requires either a procedure linkage table entry
1096 or an entry in the local got. We actually build the entry
1097 in adjust_dynamic_symbol because whether this is really a
1098 global reference can change and with it the fact if we have
1099 to create a plt entry or a local got entry. To be able to
1100 make a once global symbol a local one we have to keep track
1101 of the number of gotplt references that exist for this
1102 symbol. */
1103 if (h != NULL)
1104 {
1105 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1106 h->needs_plt = 1;
1107 h->plt.refcount += 1;
1108 }
1109 else
1110 local_got_refcounts[r_symndx] += 1;
1111 break;
1112
1113 case R_390_TLS_LDM32:
1114 htab->tls_ldm_got.refcount += 1;
1115 break;
1116
1117 case R_390_TLS_IE32:
1118 case R_390_TLS_GOTIE12:
1119 case R_390_TLS_GOTIE20:
1120 case R_390_TLS_GOTIE32:
1121 case R_390_TLS_IEENT:
1122 if (info->shared)
1123 info->flags |= DF_STATIC_TLS;
1124 /* Fall through. */
1125
1126 case R_390_GOT12:
1127 case R_390_GOT16:
1128 case R_390_GOT20:
1129 case R_390_GOT32:
1130 case R_390_GOTENT:
1131 case R_390_TLS_GD32:
1132 /* This symbol requires a global offset table entry. */
1133 switch (r_type)
1134 {
1135 default:
1136 case R_390_GOT12:
1137 case R_390_GOT16:
1138 case R_390_GOT20:
1139 case R_390_GOT32:
1140 case R_390_GOTENT:
1141 tls_type = GOT_NORMAL;
1142 break;
1143 case R_390_TLS_GD32:
1144 tls_type = GOT_TLS_GD;
1145 break;
1146 case R_390_TLS_IE32:
1147 case R_390_TLS_GOTIE32:
1148 tls_type = GOT_TLS_IE;
1149 break;
1150 case R_390_TLS_GOTIE12:
1151 case R_390_TLS_GOTIE20:
1152 case R_390_TLS_IEENT:
1153 tls_type = GOT_TLS_IE_NLT;
1154 break;
1155 }
1156
1157 if (h != NULL)
1158 {
1159 h->got.refcount += 1;
1160 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1161 }
1162 else
1163 {
1164 local_got_refcounts[r_symndx] += 1;
1165 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1166 }
1167 /* If a TLS symbol is accessed using IE at least once,
1168 there is no point to use dynamic model for it. */
1169 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1170 {
1171 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1172 {
1173 (*_bfd_error_handler)
1174 (_("%B: `%s' accessed both as normal and thread local symbol"),
1175 abfd, h->root.root.string);
1176 return FALSE;
1177 }
1178 if (old_tls_type > tls_type)
1179 tls_type = old_tls_type;
1180 }
1181
1182 if (old_tls_type != tls_type)
1183 {
1184 if (h != NULL)
1185 elf_s390_hash_entry (h)->tls_type = tls_type;
1186 else
1187 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1188 }
1189
1190 if (r_type != R_390_TLS_IE32)
1191 break;
1192 /* Fall through. */
1193
1194 case R_390_TLS_LE32:
1195 if (!info->shared)
1196 break;
1197 info->flags |= DF_STATIC_TLS;
1198 /* Fall through. */
1199
1200 case R_390_8:
1201 case R_390_16:
1202 case R_390_32:
1203 case R_390_PC16:
1204 case R_390_PC16DBL:
1205 case R_390_PC32DBL:
1206 case R_390_PC32:
1207 if (h != NULL && !info->shared)
1208 {
1209 /* If this reloc is in a read-only section, we might
1210 need a copy reloc. We can't check reliably at this
1211 stage whether the section is read-only, as input
1212 sections have not yet been mapped to output sections.
1213 Tentatively set the flag for now, and correct in
1214 adjust_dynamic_symbol. */
1215 h->non_got_ref = 1;
1216
1217 /* We may need a .plt entry if the function this reloc
1218 refers to is in a shared lib. */
1219 h->plt.refcount += 1;
1220 }
1221
1222 /* If we are creating a shared library, and this is a reloc
1223 against a global symbol, or a non PC relative reloc
1224 against a local symbol, then we need to copy the reloc
1225 into the shared library. However, if we are linking with
1226 -Bsymbolic, we do not need to copy a reloc against a
1227 global symbol which is defined in an object we are
1228 including in the link (i.e., DEF_REGULAR is set). At
1229 this point we have not seen all the input files, so it is
1230 possible that DEF_REGULAR is not set now but will be set
1231 later (it is never cleared). In case of a weak definition,
1232 DEF_REGULAR may be cleared later by a strong definition in
1233 a shared library. We account for that possibility below by
1234 storing information in the relocs_copied field of the hash
1235 table entry. A similar situation occurs when creating
1236 shared libraries and symbol visibility changes render the
1237 symbol local.
1238
1239 If on the other hand, we are creating an executable, we
1240 may need to keep relocations for symbols satisfied by a
1241 dynamic library if we manage to avoid copy relocs for the
1242 symbol. */
1243 if ((info->shared
1244 && (sec->flags & SEC_ALLOC) != 0
1245 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1246 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1247 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1248 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1249 || (h != NULL
1250 && (! info->symbolic
1251 || h->root.type == bfd_link_hash_defweak
1252 || !h->def_regular))))
1253 || (ELIMINATE_COPY_RELOCS
1254 && !info->shared
1255 && (sec->flags & SEC_ALLOC) != 0
1256 && h != NULL
1257 && (h->root.type == bfd_link_hash_defweak
1258 || !h->def_regular)))
1259 {
1260 struct elf_s390_dyn_relocs *p;
1261 struct elf_s390_dyn_relocs **head;
1262
1263 /* We must copy these reloc types into the output file.
1264 Create a reloc section in dynobj and make room for
1265 this reloc. */
1266 if (sreloc == NULL)
1267 {
1268 const char *name;
1269 bfd *dynobj;
1270
1271 name = (bfd_elf_string_from_elf_section
1272 (abfd,
1273 elf_elfheader (abfd)->e_shstrndx,
1274 elf_section_data (sec)->rel_hdr.sh_name));
1275 if (name == NULL)
1276 return FALSE;
1277
1278 if (strncmp (name, ".rela", 5) != 0
1279 || strcmp (bfd_get_section_name (abfd, sec),
1280 name + 5) != 0)
1281 {
1282 (*_bfd_error_handler)
1283 (_("%B: bad relocation section name `%s\'"),
1284 abfd, name);
1285 }
1286
1287 if (htab->elf.dynobj == NULL)
1288 htab->elf.dynobj = abfd;
1289
1290 dynobj = htab->elf.dynobj;
1291 sreloc = bfd_get_section_by_name (dynobj, name);
1292 if (sreloc == NULL)
1293 {
1294 flagword flags;
1295
1296 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1297 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1298 if ((sec->flags & SEC_ALLOC) != 0)
1299 flags |= SEC_ALLOC | SEC_LOAD;
1300 sreloc = bfd_make_section_with_flags (dynobj,
1301 name,
1302 flags);
1303 if (sreloc == NULL
1304 || ! bfd_set_section_alignment (dynobj, sreloc, 2))
1305 return FALSE;
1306 }
1307 elf_section_data (sec)->sreloc = sreloc;
1308 }
1309
1310 /* If this is a global symbol, we count the number of
1311 relocations we need for this symbol. */
1312 if (h != NULL)
1313 {
1314 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1315 }
1316 else
1317 {
1318 /* Track dynamic relocs needed for local syms too.
1319 We really need local syms available to do this
1320 easily. Oh well. */
1321 asection *s;
1322
1323 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1324 sec, r_symndx);
1325 if (s == NULL)
1326 return FALSE;
1327
1328 head = ((struct elf_s390_dyn_relocs **)
1329 &elf_section_data (s)->local_dynrel);
1330 }
1331
1332 p = *head;
1333 if (p == NULL || p->sec != sec)
1334 {
1335 bfd_size_type amt = sizeof *p;
1336
1337 p = ((struct elf_s390_dyn_relocs *)
1338 bfd_alloc (htab->elf.dynobj, amt));
1339 if (p == NULL)
1340 return FALSE;
1341 p->next = *head;
1342 *head = p;
1343 p->sec = sec;
1344 p->count = 0;
1345 p->pc_count = 0;
1346 }
1347
1348 p->count += 1;
1349 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1350 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1351 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1352 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1353 p->pc_count += 1;
1354 }
1355 break;
1356
1357 /* This relocation describes the C++ object vtable hierarchy.
1358 Reconstruct it for later use during GC. */
1359 case R_390_GNU_VTINHERIT:
1360 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1361 return FALSE;
1362 break;
1363
1364 /* This relocation describes which C++ vtable entries are actually
1365 used. Record for later use during GC. */
1366 case R_390_GNU_VTENTRY:
1367 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1368 return FALSE;
1369 break;
1370
1371 default:
1372 break;
1373 }
1374 }
1375
1376 return TRUE;
1377 }
1378
1379 /* Return the section that should be marked against GC for a given
1380 relocation. */
1381
1382 static asection *
1383 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1384 asection *sec;
1385 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1386 Elf_Internal_Rela *rel;
1387 struct elf_link_hash_entry *h;
1388 Elf_Internal_Sym *sym;
1389 {
1390 if (h != NULL)
1391 {
1392 switch (ELF32_R_TYPE (rel->r_info))
1393 {
1394 case R_390_GNU_VTINHERIT:
1395 case R_390_GNU_VTENTRY:
1396 break;
1397
1398 default:
1399 switch (h->root.type)
1400 {
1401 case bfd_link_hash_defined:
1402 case bfd_link_hash_defweak:
1403 return h->root.u.def.section;
1404
1405 case bfd_link_hash_common:
1406 return h->root.u.c.p->section;
1407
1408 default:
1409 break;
1410 }
1411 }
1412 }
1413 else
1414 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1415
1416 return NULL;
1417 }
1418
1419 /* Update the got entry reference counts for the section being removed. */
1420
1421 static bfd_boolean
1422 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1423 bfd *abfd;
1424 struct bfd_link_info *info;
1425 asection *sec;
1426 const Elf_Internal_Rela *relocs;
1427 {
1428 Elf_Internal_Shdr *symtab_hdr;
1429 struct elf_link_hash_entry **sym_hashes;
1430 bfd_signed_vma *local_got_refcounts;
1431 const Elf_Internal_Rela *rel, *relend;
1432
1433 elf_section_data (sec)->local_dynrel = NULL;
1434
1435 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1436 sym_hashes = elf_sym_hashes (abfd);
1437 local_got_refcounts = elf_local_got_refcounts (abfd);
1438
1439 relend = relocs + sec->reloc_count;
1440 for (rel = relocs; rel < relend; rel++)
1441 {
1442 unsigned long r_symndx;
1443 unsigned int r_type;
1444 struct elf_link_hash_entry *h = NULL;
1445
1446 r_symndx = ELF32_R_SYM (rel->r_info);
1447 if (r_symndx >= symtab_hdr->sh_info)
1448 {
1449 struct elf_s390_link_hash_entry *eh;
1450 struct elf_s390_dyn_relocs **pp;
1451 struct elf_s390_dyn_relocs *p;
1452
1453 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1454 while (h->root.type == bfd_link_hash_indirect
1455 || h->root.type == bfd_link_hash_warning)
1456 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1457 eh = (struct elf_s390_link_hash_entry *) h;
1458
1459 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1460 if (p->sec == sec)
1461 {
1462 /* Everything must go for SEC. */
1463 *pp = p->next;
1464 break;
1465 }
1466 }
1467
1468 r_type = ELF32_R_TYPE (rel->r_info);
1469 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1470 switch (r_type)
1471 {
1472 case R_390_TLS_LDM32:
1473 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1474 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1475 break;
1476
1477 case R_390_TLS_GD32:
1478 case R_390_TLS_IE32:
1479 case R_390_TLS_GOTIE12:
1480 case R_390_TLS_GOTIE20:
1481 case R_390_TLS_GOTIE32:
1482 case R_390_TLS_IEENT:
1483 case R_390_GOT12:
1484 case R_390_GOT16:
1485 case R_390_GOT20:
1486 case R_390_GOT32:
1487 case R_390_GOTOFF16:
1488 case R_390_GOTOFF32:
1489 case R_390_GOTPC:
1490 case R_390_GOTPCDBL:
1491 case R_390_GOTENT:
1492 if (h != NULL)
1493 {
1494 if (h->got.refcount > 0)
1495 h->got.refcount -= 1;
1496 }
1497 else if (local_got_refcounts != NULL)
1498 {
1499 if (local_got_refcounts[r_symndx] > 0)
1500 local_got_refcounts[r_symndx] -= 1;
1501 }
1502 break;
1503
1504 case R_390_8:
1505 case R_390_12:
1506 case R_390_16:
1507 case R_390_20:
1508 case R_390_32:
1509 case R_390_PC16:
1510 case R_390_PC16DBL:
1511 case R_390_PC32DBL:
1512 case R_390_PC32:
1513 if (info->shared)
1514 break;
1515 /* Fall through. */
1516
1517 case R_390_PLT16DBL:
1518 case R_390_PLT32DBL:
1519 case R_390_PLT32:
1520 case R_390_PLTOFF16:
1521 case R_390_PLTOFF32:
1522 if (h != NULL)
1523 {
1524 if (h->plt.refcount > 0)
1525 h->plt.refcount -= 1;
1526 }
1527 break;
1528
1529 case R_390_GOTPLT12:
1530 case R_390_GOTPLT16:
1531 case R_390_GOTPLT20:
1532 case R_390_GOTPLT32:
1533 case R_390_GOTPLTENT:
1534 if (h != NULL)
1535 {
1536 if (h->plt.refcount > 0)
1537 {
1538 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1539 h->plt.refcount -= 1;
1540 }
1541 }
1542 else if (local_got_refcounts != NULL)
1543 {
1544 if (local_got_refcounts[r_symndx] > 0)
1545 local_got_refcounts[r_symndx] -= 1;
1546 }
1547 break;
1548
1549 default:
1550 break;
1551 }
1552 }
1553
1554 return TRUE;
1555 }
1556
1557 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1558 entry but we found we will not create any. Called when we find we will
1559 not have any PLT for this symbol, by for example
1560 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1561 or elf_s390_size_dynamic_sections if no dynamic sections will be
1562 created (we're only linking static objects). */
1563
1564 static void
1565 elf_s390_adjust_gotplt (h)
1566 struct elf_s390_link_hash_entry *h;
1567 {
1568 if (h->elf.root.type == bfd_link_hash_warning)
1569 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1570
1571 if (h->gotplt_refcount <= 0)
1572 return;
1573
1574 /* We simply add the number of gotplt references to the number
1575 * of got references for this symbol. */
1576 h->elf.got.refcount += h->gotplt_refcount;
1577 h->gotplt_refcount = -1;
1578 }
1579
1580 /* Adjust a symbol defined by a dynamic object and referenced by a
1581 regular object. The current definition is in some section of the
1582 dynamic object, but we're not including those sections. We have to
1583 change the definition to something the rest of the link can
1584 understand. */
1585
1586 static bfd_boolean
1587 elf_s390_adjust_dynamic_symbol (info, h)
1588 struct bfd_link_info *info;
1589 struct elf_link_hash_entry *h;
1590 {
1591 struct elf_s390_link_hash_table *htab;
1592 asection *s;
1593 unsigned int power_of_two;
1594
1595 /* If this is a function, put it in the procedure linkage table. We
1596 will fill in the contents of the procedure linkage table later
1597 (although we could actually do it here). */
1598 if (h->type == STT_FUNC
1599 || h->needs_plt)
1600 {
1601 if (h->plt.refcount <= 0
1602 || (! info->shared
1603 && !h->def_dynamic
1604 && !h->ref_dynamic
1605 && h->root.type != bfd_link_hash_undefweak
1606 && h->root.type != bfd_link_hash_undefined))
1607 {
1608 /* This case can occur if we saw a PLT32 reloc in an input
1609 file, but the symbol was never referred to by a dynamic
1610 object, or if all references were garbage collected. In
1611 such a case, we don't actually need to build a procedure
1612 linkage table, and we can just do a PC32 reloc instead. */
1613 h->plt.offset = (bfd_vma) -1;
1614 h->needs_plt = 0;
1615 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1616 }
1617
1618 return TRUE;
1619 }
1620 else
1621 /* It's possible that we incorrectly decided a .plt reloc was
1622 needed for an R_390_PC32 reloc to a non-function sym in
1623 check_relocs. We can't decide accurately between function and
1624 non-function syms in check-relocs; Objects loaded later in
1625 the link may change h->type. So fix it now. */
1626 h->plt.offset = (bfd_vma) -1;
1627
1628 /* If this is a weak symbol, and there is a real definition, the
1629 processor independent code will have arranged for us to see the
1630 real definition first, and we can just use the same value. */
1631 if (h->u.weakdef != NULL)
1632 {
1633 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1634 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1635 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1636 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1637 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1638 h->non_got_ref = h->u.weakdef->non_got_ref;
1639 return TRUE;
1640 }
1641
1642 /* This is a reference to a symbol defined by a dynamic object which
1643 is not a function. */
1644
1645 /* If we are creating a shared library, we must presume that the
1646 only references to the symbol are via the global offset table.
1647 For such cases we need not do anything here; the relocations will
1648 be handled correctly by relocate_section. */
1649 if (info->shared)
1650 return TRUE;
1651
1652 /* If there are no references to this symbol that do not use the
1653 GOT, we don't need to generate a copy reloc. */
1654 if (!h->non_got_ref)
1655 return TRUE;
1656
1657 /* If -z nocopyreloc was given, we won't generate them either. */
1658 if (info->nocopyreloc)
1659 {
1660 h->non_got_ref = 0;
1661 return TRUE;
1662 }
1663
1664 if (ELIMINATE_COPY_RELOCS)
1665 {
1666 struct elf_s390_link_hash_entry * eh;
1667 struct elf_s390_dyn_relocs *p;
1668
1669 eh = (struct elf_s390_link_hash_entry *) h;
1670 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1671 {
1672 s = p->sec->output_section;
1673 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1674 break;
1675 }
1676
1677 /* If we didn't find any dynamic relocs in read-only sections, then
1678 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1679 if (p == NULL)
1680 {
1681 h->non_got_ref = 0;
1682 return TRUE;
1683 }
1684 }
1685
1686 /* We must allocate the symbol in our .dynbss section, which will
1687 become part of the .bss section of the executable. There will be
1688 an entry for this symbol in the .dynsym section. The dynamic
1689 object will contain position independent code, so all references
1690 from the dynamic object to this symbol will go through the global
1691 offset table. The dynamic linker will use the .dynsym entry to
1692 determine the address it must put in the global offset table, so
1693 both the dynamic object and the regular object will refer to the
1694 same memory location for the variable. */
1695
1696 htab = elf_s390_hash_table (info);
1697
1698 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1699 copy the initial value out of the dynamic object and into the
1700 runtime process image. */
1701 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1702 {
1703 htab->srelbss->size += sizeof (Elf32_External_Rela);
1704 h->needs_copy = 1;
1705 }
1706
1707 /* We need to figure out the alignment required for this symbol. I
1708 have no idea how ELF linkers handle this. */
1709 power_of_two = bfd_log2 (h->size);
1710 if (power_of_two > 3)
1711 power_of_two = 3;
1712
1713 /* Apply the required alignment. */
1714 s = htab->sdynbss;
1715 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1716 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1717 {
1718 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1719 return FALSE;
1720 }
1721
1722 /* Define the symbol as being at this point in the section. */
1723 h->root.u.def.section = s;
1724 h->root.u.def.value = s->size;
1725
1726 /* Increment the section size to make room for the symbol. */
1727 s->size += h->size;
1728
1729 return TRUE;
1730 }
1731
1732 /* Allocate space in .plt, .got and associated reloc sections for
1733 dynamic relocs. */
1734
1735 static bfd_boolean
1736 allocate_dynrelocs (h, inf)
1737 struct elf_link_hash_entry *h;
1738 PTR inf;
1739 {
1740 struct bfd_link_info *info;
1741 struct elf_s390_link_hash_table *htab;
1742 struct elf_s390_link_hash_entry *eh;
1743 struct elf_s390_dyn_relocs *p;
1744
1745 if (h->root.type == bfd_link_hash_indirect)
1746 return TRUE;
1747
1748 if (h->root.type == bfd_link_hash_warning)
1749 /* When warning symbols are created, they **replace** the "real"
1750 entry in the hash table, thus we never get to see the real
1751 symbol in a hash traversal. So look at it now. */
1752 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1753
1754 info = (struct bfd_link_info *) inf;
1755 htab = elf_s390_hash_table (info);
1756
1757 if (htab->elf.dynamic_sections_created
1758 && h->plt.refcount > 0
1759 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1760 || h->root.type != bfd_link_hash_undefweak))
1761 {
1762 /* Make sure this symbol is output as a dynamic symbol.
1763 Undefined weak syms won't yet be marked as dynamic. */
1764 if (h->dynindx == -1
1765 && !h->forced_local)
1766 {
1767 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1768 return FALSE;
1769 }
1770
1771 if (info->shared
1772 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1773 {
1774 asection *s = htab->splt;
1775
1776 /* If this is the first .plt entry, make room for the special
1777 first entry. */
1778 if (s->size == 0)
1779 s->size += PLT_FIRST_ENTRY_SIZE;
1780
1781 h->plt.offset = s->size;
1782
1783 /* If this symbol is not defined in a regular file, and we are
1784 not generating a shared library, then set the symbol to this
1785 location in the .plt. This is required to make function
1786 pointers compare as equal between the normal executable and
1787 the shared library. */
1788 if (! info->shared
1789 && !h->def_regular)
1790 {
1791 h->root.u.def.section = s;
1792 h->root.u.def.value = h->plt.offset;
1793 }
1794
1795 /* Make room for this entry. */
1796 s->size += PLT_ENTRY_SIZE;
1797
1798 /* We also need to make an entry in the .got.plt section, which
1799 will be placed in the .got section by the linker script. */
1800 htab->sgotplt->size += GOT_ENTRY_SIZE;
1801
1802 /* We also need to make an entry in the .rela.plt section. */
1803 htab->srelplt->size += sizeof (Elf32_External_Rela);
1804 }
1805 else
1806 {
1807 h->plt.offset = (bfd_vma) -1;
1808 h->needs_plt = 0;
1809 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1810 }
1811 }
1812 else
1813 {
1814 h->plt.offset = (bfd_vma) -1;
1815 h->needs_plt = 0;
1816 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1817 }
1818
1819 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1820 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1821 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1822 we can save the dynamic TLS relocation. */
1823 if (h->got.refcount > 0
1824 && !info->shared
1825 && h->dynindx == -1
1826 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1827 {
1828 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1829 /* For the GOTIE access without a literal pool entry the offset has
1830 to be stored somewhere. The immediate value in the instruction
1831 is not bit enough so the value is stored in the got. */
1832 {
1833 h->got.offset = htab->sgot->size;
1834 htab->sgot->size += GOT_ENTRY_SIZE;
1835 }
1836 else
1837 h->got.offset = (bfd_vma) -1;
1838 }
1839 else if (h->got.refcount > 0)
1840 {
1841 asection *s;
1842 bfd_boolean dyn;
1843 int tls_type = elf_s390_hash_entry(h)->tls_type;
1844
1845 /* Make sure this symbol is output as a dynamic symbol.
1846 Undefined weak syms won't yet be marked as dynamic. */
1847 if (h->dynindx == -1
1848 && !h->forced_local)
1849 {
1850 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1851 return FALSE;
1852 }
1853
1854 s = htab->sgot;
1855 h->got.offset = s->size;
1856 s->size += GOT_ENTRY_SIZE;
1857 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1858 if (tls_type == GOT_TLS_GD)
1859 s->size += GOT_ENTRY_SIZE;
1860 dyn = htab->elf.dynamic_sections_created;
1861 /* R_390_TLS_IE32 needs one dynamic relocation,
1862 R_390_TLS_GD32 needs one if local symbol and two if global. */
1863 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1864 || tls_type >= GOT_TLS_IE)
1865 htab->srelgot->size += sizeof (Elf32_External_Rela);
1866 else if (tls_type == GOT_TLS_GD)
1867 htab->srelgot->size += 2 * sizeof (Elf32_External_Rela);
1868 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1869 || h->root.type != bfd_link_hash_undefweak)
1870 && (info->shared
1871 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1872 htab->srelgot->size += sizeof (Elf32_External_Rela);
1873 }
1874 else
1875 h->got.offset = (bfd_vma) -1;
1876
1877 eh = (struct elf_s390_link_hash_entry *) h;
1878 if (eh->dyn_relocs == NULL)
1879 return TRUE;
1880
1881 /* In the shared -Bsymbolic case, discard space allocated for
1882 dynamic pc-relative relocs against symbols which turn out to be
1883 defined in regular objects. For the normal shared case, discard
1884 space for pc-relative relocs that have become local due to symbol
1885 visibility changes. */
1886
1887 if (info->shared)
1888 {
1889 if (SYMBOL_REFERENCES_LOCAL (info, h))
1890 {
1891 struct elf_s390_dyn_relocs **pp;
1892
1893 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1894 {
1895 p->count -= p->pc_count;
1896 p->pc_count = 0;
1897 if (p->count == 0)
1898 *pp = p->next;
1899 else
1900 pp = &p->next;
1901 }
1902 }
1903
1904 /* Also discard relocs on undefined weak syms with non-default
1905 visibility. */
1906 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1907 && h->root.type == bfd_link_hash_undefweak)
1908 eh->dyn_relocs = NULL;
1909 }
1910 else if (ELIMINATE_COPY_RELOCS)
1911 {
1912 /* For the non-shared case, discard space for relocs against
1913 symbols which turn out to need copy relocs or are not
1914 dynamic. */
1915
1916 if (!h->non_got_ref
1917 && ((h->def_dynamic
1918 && !h->def_regular)
1919 || (htab->elf.dynamic_sections_created
1920 && (h->root.type == bfd_link_hash_undefweak
1921 || h->root.type == bfd_link_hash_undefined))))
1922 {
1923 /* Make sure this symbol is output as a dynamic symbol.
1924 Undefined weak syms won't yet be marked as dynamic. */
1925 if (h->dynindx == -1
1926 && !h->forced_local)
1927 {
1928 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1929 return FALSE;
1930 }
1931
1932 /* If that succeeded, we know we'll be keeping all the
1933 relocs. */
1934 if (h->dynindx != -1)
1935 goto keep;
1936 }
1937
1938 eh->dyn_relocs = NULL;
1939
1940 keep: ;
1941 }
1942
1943 /* Finally, allocate space. */
1944 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1945 {
1946 asection *sreloc = elf_section_data (p->sec)->sreloc;
1947
1948 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1949 }
1950
1951 return TRUE;
1952 }
1953
1954 /* Find any dynamic relocs that apply to read-only sections. */
1955
1956 static bfd_boolean
1957 readonly_dynrelocs (h, inf)
1958 struct elf_link_hash_entry *h;
1959 PTR inf;
1960 {
1961 struct elf_s390_link_hash_entry *eh;
1962 struct elf_s390_dyn_relocs *p;
1963
1964 if (h->root.type == bfd_link_hash_warning)
1965 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1966
1967 eh = (struct elf_s390_link_hash_entry *) h;
1968 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1969 {
1970 asection *s = p->sec->output_section;
1971
1972 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1973 {
1974 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1975
1976 info->flags |= DF_TEXTREL;
1977
1978 /* Not an error, just cut short the traversal. */
1979 return FALSE;
1980 }
1981 }
1982 return TRUE;
1983 }
1984
1985 /* Set the sizes of the dynamic sections. */
1986
1987 static bfd_boolean
1988 elf_s390_size_dynamic_sections (output_bfd, info)
1989 bfd *output_bfd ATTRIBUTE_UNUSED;
1990 struct bfd_link_info *info;
1991 {
1992 struct elf_s390_link_hash_table *htab;
1993 bfd *dynobj;
1994 asection *s;
1995 bfd_boolean relocs;
1996 bfd *ibfd;
1997
1998 htab = elf_s390_hash_table (info);
1999 dynobj = htab->elf.dynobj;
2000 if (dynobj == NULL)
2001 abort ();
2002
2003 if (htab->elf.dynamic_sections_created)
2004 {
2005 /* Set the contents of the .interp section to the interpreter. */
2006 if (info->executable)
2007 {
2008 s = bfd_get_section_by_name (dynobj, ".interp");
2009 if (s == NULL)
2010 abort ();
2011 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2012 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2013 }
2014 }
2015
2016 /* Set up .got offsets for local syms, and space for local dynamic
2017 relocs. */
2018 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2019 {
2020 bfd_signed_vma *local_got;
2021 bfd_signed_vma *end_local_got;
2022 char *local_tls_type;
2023 bfd_size_type locsymcount;
2024 Elf_Internal_Shdr *symtab_hdr;
2025 asection *srela;
2026
2027 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2028 continue;
2029
2030 for (s = ibfd->sections; s != NULL; s = s->next)
2031 {
2032 struct elf_s390_dyn_relocs *p;
2033
2034 for (p = *((struct elf_s390_dyn_relocs **)
2035 &elf_section_data (s)->local_dynrel);
2036 p != NULL;
2037 p = p->next)
2038 {
2039 if (!bfd_is_abs_section (p->sec)
2040 && bfd_is_abs_section (p->sec->output_section))
2041 {
2042 /* Input section has been discarded, either because
2043 it is a copy of a linkonce section or due to
2044 linker script /DISCARD/, so we'll be discarding
2045 the relocs too. */
2046 }
2047 else if (p->count != 0)
2048 {
2049 srela = elf_section_data (p->sec)->sreloc;
2050 srela->size += p->count * sizeof (Elf32_External_Rela);
2051 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2052 info->flags |= DF_TEXTREL;
2053 }
2054 }
2055 }
2056
2057 local_got = elf_local_got_refcounts (ibfd);
2058 if (!local_got)
2059 continue;
2060
2061 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2062 locsymcount = symtab_hdr->sh_info;
2063 end_local_got = local_got + locsymcount;
2064 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2065 s = htab->sgot;
2066 srela = htab->srelgot;
2067 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2068 {
2069 if (*local_got > 0)
2070 {
2071 *local_got = s->size;
2072 s->size += GOT_ENTRY_SIZE;
2073 if (*local_tls_type == GOT_TLS_GD)
2074 s->size += GOT_ENTRY_SIZE;
2075 if (info->shared)
2076 srela->size += sizeof (Elf32_External_Rela);
2077 }
2078 else
2079 *local_got = (bfd_vma) -1;
2080 }
2081 }
2082
2083 if (htab->tls_ldm_got.refcount > 0)
2084 {
2085 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2086 relocs. */
2087 htab->tls_ldm_got.offset = htab->sgot->size;
2088 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2089 htab->srelgot->size += sizeof (Elf32_External_Rela);
2090 }
2091 else
2092 htab->tls_ldm_got.offset = -1;
2093
2094 /* Allocate global sym .plt and .got entries, and space for global
2095 sym dynamic relocs. */
2096 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2097
2098 /* We now have determined the sizes of the various dynamic sections.
2099 Allocate memory for them. */
2100 relocs = FALSE;
2101 for (s = dynobj->sections; s != NULL; s = s->next)
2102 {
2103 if ((s->flags & SEC_LINKER_CREATED) == 0)
2104 continue;
2105
2106 if (s == htab->splt
2107 || s == htab->sgot
2108 || s == htab->sgotplt)
2109 {
2110 /* Strip this section if we don't need it; see the
2111 comment below. */
2112 }
2113 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2114 {
2115 if (s->size != 0)
2116 relocs = TRUE;
2117
2118 /* We use the reloc_count field as a counter if we need
2119 to copy relocs into the output file. */
2120 s->reloc_count = 0;
2121 }
2122 else
2123 {
2124 /* It's not one of our sections, so don't allocate space. */
2125 continue;
2126 }
2127
2128 if (s->size == 0)
2129 {
2130 /* If we don't need this section, strip it from the
2131 output file. This is to handle .rela.bss and
2132 .rela.plt. We must create it in
2133 create_dynamic_sections, because it must be created
2134 before the linker maps input sections to output
2135 sections. The linker does that before
2136 adjust_dynamic_symbol is called, and it is that
2137 function which decides whether anything needs to go
2138 into these sections. */
2139
2140 s->flags |= SEC_EXCLUDE;
2141 continue;
2142 }
2143
2144 /* Allocate memory for the section contents. We use bfd_zalloc
2145 here in case unused entries are not reclaimed before the
2146 section's contents are written out. This should not happen,
2147 but this way if it does, we get a R_390_NONE reloc instead
2148 of garbage. */
2149 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2150 if (s->contents == NULL)
2151 return FALSE;
2152 }
2153
2154 if (htab->elf.dynamic_sections_created)
2155 {
2156 /* Add some entries to the .dynamic section. We fill in the
2157 values later, in elf_s390_finish_dynamic_sections, but we
2158 must add the entries now so that we get the correct size for
2159 the .dynamic section. The DT_DEBUG entry is filled in by the
2160 dynamic linker and used by the debugger. */
2161 #define add_dynamic_entry(TAG, VAL) \
2162 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2163
2164 if (info->executable)
2165 {
2166 if (!add_dynamic_entry (DT_DEBUG, 0))
2167 return FALSE;
2168 }
2169
2170 if (htab->splt->size != 0)
2171 {
2172 if (!add_dynamic_entry (DT_PLTGOT, 0)
2173 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2174 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2175 || !add_dynamic_entry (DT_JMPREL, 0))
2176 return FALSE;
2177 }
2178
2179 if (relocs)
2180 {
2181 if (!add_dynamic_entry (DT_RELA, 0)
2182 || !add_dynamic_entry (DT_RELASZ, 0)
2183 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2184 return FALSE;
2185
2186 /* If any dynamic relocs apply to a read-only section,
2187 then we need a DT_TEXTREL entry. */
2188 if ((info->flags & DF_TEXTREL) == 0)
2189 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2190 (PTR) info);
2191
2192 if ((info->flags & DF_TEXTREL) != 0)
2193 {
2194 if (!add_dynamic_entry (DT_TEXTREL, 0))
2195 return FALSE;
2196 }
2197 }
2198 }
2199 #undef add_dynamic_entry
2200
2201 return TRUE;
2202 }
2203
2204 /* Return the base VMA address which should be subtracted from real addresses
2205 when resolving @dtpoff relocation.
2206 This is PT_TLS segment p_vaddr. */
2207
2208 static bfd_vma
2209 dtpoff_base (info)
2210 struct bfd_link_info *info;
2211 {
2212 /* If tls_sec is NULL, we should have signalled an error already. */
2213 if (elf_hash_table (info)->tls_sec == NULL)
2214 return 0;
2215 return elf_hash_table (info)->tls_sec->vma;
2216 }
2217
2218 /* Return the relocation value for @tpoff relocation
2219 if STT_TLS virtual address is ADDRESS. */
2220
2221 static bfd_vma
2222 tpoff (info, address)
2223 struct bfd_link_info *info;
2224 bfd_vma address;
2225 {
2226 struct elf_link_hash_table *htab = elf_hash_table (info);
2227
2228 /* If tls_sec is NULL, we should have signalled an error already. */
2229 if (htab->tls_sec == NULL)
2230 return 0;
2231 return htab->tls_size + htab->tls_sec->vma - address;
2232 }
2233
2234 /* Complain if TLS instruction relocation is against an invalid
2235 instruction. */
2236
2237 static void
2238 invalid_tls_insn (input_bfd, input_section, rel)
2239 bfd *input_bfd;
2240 asection *input_section;
2241 Elf_Internal_Rela *rel;
2242 {
2243 reloc_howto_type *howto;
2244
2245 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2246 (*_bfd_error_handler)
2247 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2248 input_bfd,
2249 input_section,
2250 (long) rel->r_offset,
2251 howto->name);
2252 }
2253
2254 /* Relocate a 390 ELF section. */
2255
2256 static bfd_boolean
2257 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2258 contents, relocs, local_syms, local_sections)
2259 bfd *output_bfd;
2260 struct bfd_link_info *info;
2261 bfd *input_bfd;
2262 asection *input_section;
2263 bfd_byte *contents;
2264 Elf_Internal_Rela *relocs;
2265 Elf_Internal_Sym *local_syms;
2266 asection **local_sections;
2267 {
2268 struct elf_s390_link_hash_table *htab;
2269 Elf_Internal_Shdr *symtab_hdr;
2270 struct elf_link_hash_entry **sym_hashes;
2271 bfd_vma *local_got_offsets;
2272 Elf_Internal_Rela *rel;
2273 Elf_Internal_Rela *relend;
2274
2275 if (info->relocatable)
2276 return TRUE;
2277
2278 htab = elf_s390_hash_table (info);
2279 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2280 sym_hashes = elf_sym_hashes (input_bfd);
2281 local_got_offsets = elf_local_got_offsets (input_bfd);
2282
2283 rel = relocs;
2284 relend = relocs + input_section->reloc_count;
2285 for (; rel < relend; rel++)
2286 {
2287 unsigned int r_type;
2288 reloc_howto_type *howto;
2289 unsigned long r_symndx;
2290 struct elf_link_hash_entry *h;
2291 Elf_Internal_Sym *sym;
2292 asection *sec;
2293 bfd_vma off;
2294 bfd_vma relocation;
2295 bfd_boolean unresolved_reloc;
2296 bfd_reloc_status_type r;
2297 int tls_type;
2298
2299 r_type = ELF32_R_TYPE (rel->r_info);
2300 if (r_type == (int) R_390_GNU_VTINHERIT
2301 || r_type == (int) R_390_GNU_VTENTRY)
2302 continue;
2303 if (r_type >= (int) R_390_max)
2304 {
2305 bfd_set_error (bfd_error_bad_value);
2306 return FALSE;
2307 }
2308
2309 howto = elf_howto_table + r_type;
2310 r_symndx = ELF32_R_SYM (rel->r_info);
2311
2312 /* This is a final link. */
2313 h = NULL;
2314 sym = NULL;
2315 sec = NULL;
2316 unresolved_reloc = FALSE;
2317 if (r_symndx < symtab_hdr->sh_info)
2318 {
2319 sym = local_syms + r_symndx;
2320 sec = local_sections[r_symndx];
2321 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2322 }
2323 else
2324 {
2325 bfd_boolean warned ATTRIBUTE_UNUSED;
2326
2327 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2328 r_symndx, symtab_hdr, sym_hashes,
2329 h, sec, relocation,
2330 unresolved_reloc, warned);
2331 }
2332
2333 switch (r_type)
2334 {
2335 case R_390_GOTPLT12:
2336 case R_390_GOTPLT16:
2337 case R_390_GOTPLT20:
2338 case R_390_GOTPLT32:
2339 case R_390_GOTPLTENT:
2340 /* There are three cases for a GOTPLT relocation. 1) The
2341 relocation is against the jump slot entry of a plt that
2342 will get emitted to the output file. 2) The relocation
2343 is against the jump slot of a plt entry that has been
2344 removed. elf_s390_adjust_gotplt has created a GOT entry
2345 as replacement. 3) The relocation is against a local symbol.
2346 Cases 2) and 3) are the same as the GOT relocation code
2347 so we just have to test for case 1 and fall through for
2348 the other two. */
2349 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2350 {
2351 bfd_vma plt_index;
2352
2353 /* Calc. index no.
2354 Current offset - size first entry / entry size. */
2355 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2356 PLT_ENTRY_SIZE;
2357
2358 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2359 addr & GOT addr. */
2360 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2361 unresolved_reloc = FALSE;
2362
2363 if (r_type == R_390_GOTPLTENT)
2364 relocation += htab->sgot->output_section->vma;
2365 break;
2366 }
2367 /* Fall through. */
2368
2369 case R_390_GOT12:
2370 case R_390_GOT16:
2371 case R_390_GOT20:
2372 case R_390_GOT32:
2373 case R_390_GOTENT:
2374 /* Relocation is to the entry for this symbol in the global
2375 offset table. */
2376 if (htab->sgot == NULL)
2377 abort ();
2378
2379 if (h != NULL)
2380 {
2381 bfd_boolean dyn;
2382
2383 off = h->got.offset;
2384 dyn = htab->elf.dynamic_sections_created;
2385 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2386 || (info->shared
2387 && (info->symbolic
2388 || h->dynindx == -1
2389 || h->forced_local)
2390 && h->def_regular)
2391 || (ELF_ST_VISIBILITY (h->other)
2392 && h->root.type == bfd_link_hash_undefweak))
2393 {
2394 /* This is actually a static link, or it is a
2395 -Bsymbolic link and the symbol is defined
2396 locally, or the symbol was forced to be local
2397 because of a version file. We must initialize
2398 this entry in the global offset table. Since the
2399 offset must always be a multiple of 2, we use the
2400 least significant bit to record whether we have
2401 initialized it already.
2402
2403 When doing a dynamic link, we create a .rel.got
2404 relocation entry to initialize the value. This
2405 is done in the finish_dynamic_symbol routine. */
2406 if ((off & 1) != 0)
2407 off &= ~1;
2408 else
2409 {
2410 bfd_put_32 (output_bfd, relocation,
2411 htab->sgot->contents + off);
2412 h->got.offset |= 1;
2413 }
2414 }
2415 else
2416 unresolved_reloc = FALSE;
2417 }
2418 else
2419 {
2420 if (local_got_offsets == NULL)
2421 abort ();
2422
2423 off = local_got_offsets[r_symndx];
2424
2425 /* The offset must always be a multiple of 4. We use
2426 the least significant bit to record whether we have
2427 already generated the necessary reloc. */
2428 if ((off & 1) != 0)
2429 off &= ~1;
2430 else
2431 {
2432 bfd_put_32 (output_bfd, relocation,
2433 htab->sgot->contents + off);
2434
2435 if (info->shared)
2436 {
2437 asection *srelgot;
2438 Elf_Internal_Rela outrel;
2439 bfd_byte *loc;
2440
2441 srelgot = htab->srelgot;
2442 if (srelgot == NULL)
2443 abort ();
2444
2445 outrel.r_offset = (htab->sgot->output_section->vma
2446 + htab->sgot->output_offset
2447 + off);
2448 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2449 outrel.r_addend = relocation;
2450 loc = srelgot->contents;
2451 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2452 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2453 }
2454
2455 local_got_offsets[r_symndx] |= 1;
2456 }
2457 }
2458
2459 if (off >= (bfd_vma) -2)
2460 abort ();
2461
2462 relocation = htab->sgot->output_offset + off;
2463
2464 /* For @GOTENT the relocation is against the offset between
2465 the instruction and the symbols entry in the GOT and not
2466 between the start of the GOT and the symbols entry. We
2467 add the vma of the GOT to get the correct value. */
2468 if ( r_type == R_390_GOTENT
2469 || r_type == R_390_GOTPLTENT)
2470 relocation += htab->sgot->output_section->vma;
2471
2472 break;
2473
2474 case R_390_GOTOFF16:
2475 case R_390_GOTOFF32:
2476 /* Relocation is relative to the start of the global offset
2477 table. */
2478
2479 /* Note that sgot->output_offset is not involved in this
2480 calculation. We always want the start of .got. If we
2481 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2482 permitted by the ABI, we might have to change this
2483 calculation. */
2484 relocation -= htab->sgot->output_section->vma;
2485 break;
2486
2487 case R_390_GOTPC:
2488 case R_390_GOTPCDBL:
2489 /* Use global offset table as symbol value. */
2490 relocation = htab->sgot->output_section->vma;
2491 unresolved_reloc = FALSE;
2492 break;
2493
2494 case R_390_PLT16DBL:
2495 case R_390_PLT32DBL:
2496 case R_390_PLT32:
2497 /* Relocation is to the entry for this symbol in the
2498 procedure linkage table. */
2499
2500 /* Resolve a PLT32 reloc against a local symbol directly,
2501 without using the procedure linkage table. */
2502 if (h == NULL)
2503 break;
2504
2505 if (h->plt.offset == (bfd_vma) -1
2506 || htab->splt == NULL)
2507 {
2508 /* We didn't make a PLT entry for this symbol. This
2509 happens when statically linking PIC code, or when
2510 using -Bsymbolic. */
2511 break;
2512 }
2513
2514 relocation = (htab->splt->output_section->vma
2515 + htab->splt->output_offset
2516 + h->plt.offset);
2517 unresolved_reloc = FALSE;
2518 break;
2519
2520 case R_390_PLTOFF16:
2521 case R_390_PLTOFF32:
2522 /* Relocation is to the entry for this symbol in the
2523 procedure linkage table relative to the start of the GOT. */
2524
2525 /* For local symbols or if we didn't make a PLT entry for
2526 this symbol resolve the symbol directly. */
2527 if ( h == NULL
2528 || h->plt.offset == (bfd_vma) -1
2529 || htab->splt == NULL)
2530 {
2531 relocation -= htab->sgot->output_section->vma;
2532 break;
2533 }
2534
2535 relocation = (htab->splt->output_section->vma
2536 + htab->splt->output_offset
2537 + h->plt.offset
2538 - htab->sgot->output_section->vma);
2539 unresolved_reloc = FALSE;
2540 break;
2541
2542 case R_390_8:
2543 case R_390_16:
2544 case R_390_32:
2545 case R_390_PC16:
2546 case R_390_PC16DBL:
2547 case R_390_PC32DBL:
2548 case R_390_PC32:
2549 /* r_symndx will be zero only for relocs against symbols
2550 from removed linkonce sections, or sections discarded by
2551 a linker script. */
2552 if (r_symndx == 0
2553 || (input_section->flags & SEC_ALLOC) == 0)
2554 break;
2555
2556 if ((info->shared
2557 && (h == NULL
2558 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2559 || h->root.type != bfd_link_hash_undefweak)
2560 && ((r_type != R_390_PC16
2561 && r_type != R_390_PC16DBL
2562 && r_type != R_390_PC32DBL
2563 && r_type != R_390_PC32)
2564 || (h != NULL
2565 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2566 || (ELIMINATE_COPY_RELOCS
2567 && !info->shared
2568 && h != NULL
2569 && h->dynindx != -1
2570 && !h->non_got_ref
2571 && ((h->def_dynamic
2572 && !h->def_regular)
2573 || h->root.type == bfd_link_hash_undefweak
2574 || h->root.type == bfd_link_hash_undefined)))
2575 {
2576 Elf_Internal_Rela outrel;
2577 bfd_boolean skip, relocate;
2578 asection *sreloc;
2579 bfd_byte *loc;
2580
2581 /* When generating a shared object, these relocations
2582 are copied into the output file to be resolved at run
2583 time. */
2584
2585 skip = FALSE;
2586 relocate = FALSE;
2587
2588 outrel.r_offset =
2589 _bfd_elf_section_offset (output_bfd, info, input_section,
2590 rel->r_offset);
2591 if (outrel.r_offset == (bfd_vma) -1)
2592 skip = TRUE;
2593 else if (outrel.r_offset == (bfd_vma) -2)
2594 skip = TRUE, relocate = TRUE;
2595 outrel.r_offset += (input_section->output_section->vma
2596 + input_section->output_offset);
2597
2598 if (skip)
2599 memset (&outrel, 0, sizeof outrel);
2600 else if (h != NULL
2601 && h->dynindx != -1
2602 && (r_type == R_390_PC16
2603 || r_type == R_390_PC16DBL
2604 || r_type == R_390_PC32DBL
2605 || r_type == R_390_PC32
2606 || !info->shared
2607 || !info->symbolic
2608 || !h->def_regular))
2609 {
2610 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2611 outrel.r_addend = rel->r_addend;
2612 }
2613 else
2614 {
2615 /* This symbol is local, or marked to become local. */
2616 outrel.r_addend = relocation + rel->r_addend;
2617 if (r_type == R_390_32)
2618 {
2619 relocate = TRUE;
2620 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2621 }
2622 else
2623 {
2624 long sindx;
2625
2626 if (bfd_is_abs_section (sec))
2627 sindx = 0;
2628 else if (sec == NULL || sec->owner == NULL)
2629 {
2630 bfd_set_error(bfd_error_bad_value);
2631 return FALSE;
2632 }
2633 else
2634 {
2635 asection *osec;
2636
2637 osec = sec->output_section;
2638 sindx = elf_section_data (osec)->dynindx;
2639 BFD_ASSERT (sindx > 0);
2640
2641 /* We are turning this relocation into one
2642 against a section symbol, so subtract out
2643 the output section's address but not the
2644 offset of the input section in the output
2645 section. */
2646
2647 outrel.r_addend -= osec->vma;
2648 }
2649 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2650 }
2651 }
2652
2653 sreloc = elf_section_data (input_section)->sreloc;
2654 if (sreloc == NULL)
2655 abort ();
2656
2657 loc = sreloc->contents;
2658 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2659 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2660
2661 /* If this reloc is against an external symbol, we do
2662 not want to fiddle with the addend. Otherwise, we
2663 need to include the symbol value so that it becomes
2664 an addend for the dynamic reloc. */
2665 if (! relocate)
2666 continue;
2667 }
2668 break;
2669
2670 /* Relocations for tls literal pool entries. */
2671 case R_390_TLS_IE32:
2672 if (info->shared)
2673 {
2674 Elf_Internal_Rela outrel;
2675 asection *sreloc;
2676 bfd_byte *loc;
2677
2678 outrel.r_offset = rel->r_offset
2679 + input_section->output_section->vma
2680 + input_section->output_offset;
2681 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2682 sreloc = elf_section_data (input_section)->sreloc;
2683 if (sreloc == NULL)
2684 abort ();
2685 loc = sreloc->contents;
2686 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2687 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2688 }
2689 /* Fall through. */
2690
2691 case R_390_TLS_GD32:
2692 case R_390_TLS_GOTIE32:
2693 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2694 tls_type = GOT_UNKNOWN;
2695 if (h == NULL && local_got_offsets)
2696 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2697 else if (h != NULL)
2698 {
2699 tls_type = elf_s390_hash_entry(h)->tls_type;
2700 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2701 r_type = R_390_TLS_LE32;
2702 }
2703 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2704 r_type = R_390_TLS_IE32;
2705
2706 if (r_type == R_390_TLS_LE32)
2707 {
2708 /* This relocation gets optimized away by the local exec
2709 access optimization. */
2710 BFD_ASSERT (! unresolved_reloc);
2711 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2712 contents + rel->r_offset);
2713 continue;
2714 }
2715
2716 if (htab->sgot == NULL)
2717 abort ();
2718
2719 if (h != NULL)
2720 off = h->got.offset;
2721 else
2722 {
2723 if (local_got_offsets == NULL)
2724 abort ();
2725
2726 off = local_got_offsets[r_symndx];
2727 }
2728
2729 emit_tls_relocs:
2730
2731 if ((off & 1) != 0)
2732 off &= ~1;
2733 else
2734 {
2735 Elf_Internal_Rela outrel;
2736 bfd_byte *loc;
2737 int dr_type, indx;
2738
2739 if (htab->srelgot == NULL)
2740 abort ();
2741
2742 outrel.r_offset = (htab->sgot->output_section->vma
2743 + htab->sgot->output_offset + off);
2744
2745 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2746 if (r_type == R_390_TLS_GD32)
2747 dr_type = R_390_TLS_DTPMOD;
2748 else
2749 dr_type = R_390_TLS_TPOFF;
2750 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2751 outrel.r_addend = relocation - dtpoff_base (info);
2752 else
2753 outrel.r_addend = 0;
2754 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2755 loc = htab->srelgot->contents;
2756 loc += htab->srelgot->reloc_count++
2757 * sizeof (Elf32_External_Rela);
2758 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2759
2760 if (r_type == R_390_TLS_GD32)
2761 {
2762 if (indx == 0)
2763 {
2764 BFD_ASSERT (! unresolved_reloc);
2765 bfd_put_32 (output_bfd,
2766 relocation - dtpoff_base (info),
2767 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2768 }
2769 else
2770 {
2771 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2772 outrel.r_offset += GOT_ENTRY_SIZE;
2773 outrel.r_addend = 0;
2774 htab->srelgot->reloc_count++;
2775 loc += sizeof (Elf32_External_Rela);
2776 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2777 }
2778 }
2779
2780 if (h != NULL)
2781 h->got.offset |= 1;
2782 else
2783 local_got_offsets[r_symndx] |= 1;
2784 }
2785
2786 if (off >= (bfd_vma) -2)
2787 abort ();
2788 if (r_type == ELF32_R_TYPE (rel->r_info))
2789 {
2790 relocation = htab->sgot->output_offset + off;
2791 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2792 relocation += htab->sgot->output_section->vma;
2793 unresolved_reloc = FALSE;
2794 }
2795 else
2796 {
2797 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2798 contents + rel->r_offset);
2799 continue;
2800 }
2801 break;
2802
2803 case R_390_TLS_GOTIE12:
2804 case R_390_TLS_GOTIE20:
2805 case R_390_TLS_IEENT:
2806 if (h == NULL)
2807 {
2808 if (local_got_offsets == NULL)
2809 abort();
2810 off = local_got_offsets[r_symndx];
2811 if (info->shared)
2812 goto emit_tls_relocs;
2813 }
2814 else
2815 {
2816 off = h->got.offset;
2817 tls_type = elf_s390_hash_entry(h)->tls_type;
2818 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2819 goto emit_tls_relocs;
2820 }
2821
2822 if (htab->sgot == NULL)
2823 abort ();
2824
2825 BFD_ASSERT (! unresolved_reloc);
2826 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2827 htab->sgot->contents + off);
2828 relocation = htab->sgot->output_offset + off;
2829 if (r_type == R_390_TLS_IEENT)
2830 relocation += htab->sgot->output_section->vma;
2831 unresolved_reloc = FALSE;
2832 break;
2833
2834 case R_390_TLS_LDM32:
2835 if (! info->shared)
2836 /* The literal pool entry this relocation refers to gets ignored
2837 by the optimized code of the local exec model. Do nothing
2838 and the value will turn out zero. */
2839 continue;
2840
2841 if (htab->sgot == NULL)
2842 abort ();
2843
2844 off = htab->tls_ldm_got.offset;
2845 if (off & 1)
2846 off &= ~1;
2847 else
2848 {
2849 Elf_Internal_Rela outrel;
2850 bfd_byte *loc;
2851
2852 if (htab->srelgot == NULL)
2853 abort ();
2854
2855 outrel.r_offset = (htab->sgot->output_section->vma
2856 + htab->sgot->output_offset + off);
2857
2858 bfd_put_32 (output_bfd, 0,
2859 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2860 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2861 outrel.r_addend = 0;
2862 loc = htab->srelgot->contents;
2863 loc += htab->srelgot->reloc_count++
2864 * sizeof (Elf32_External_Rela);
2865 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2866 htab->tls_ldm_got.offset |= 1;
2867 }
2868 relocation = htab->sgot->output_offset + off;
2869 unresolved_reloc = FALSE;
2870 break;
2871
2872 case R_390_TLS_LE32:
2873 if (info->shared)
2874 {
2875 /* Linking a shared library with non-fpic code requires
2876 a R_390_TLS_TPOFF relocation. */
2877 Elf_Internal_Rela outrel;
2878 asection *sreloc;
2879 bfd_byte *loc;
2880 int indx;
2881
2882 outrel.r_offset = rel->r_offset
2883 + input_section->output_section->vma
2884 + input_section->output_offset;
2885 if (h != NULL && h->dynindx != -1)
2886 indx = h->dynindx;
2887 else
2888 indx = 0;
2889 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2890 if (indx == 0)
2891 outrel.r_addend = relocation - dtpoff_base (info);
2892 else
2893 outrel.r_addend = 0;
2894 sreloc = elf_section_data (input_section)->sreloc;
2895 if (sreloc == NULL)
2896 abort ();
2897 loc = sreloc->contents;
2898 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2899 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2900 }
2901 else
2902 {
2903 BFD_ASSERT (! unresolved_reloc);
2904 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2905 contents + rel->r_offset);
2906 }
2907 continue;
2908
2909 case R_390_TLS_LDO32:
2910 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2911 relocation -= dtpoff_base (info);
2912 else
2913 /* When converting LDO to LE, we must negate. */
2914 relocation = -tpoff (info, relocation);
2915 break;
2916
2917 /* Relocations for tls instructions. */
2918 case R_390_TLS_LOAD:
2919 case R_390_TLS_GDCALL:
2920 case R_390_TLS_LDCALL:
2921 tls_type = GOT_UNKNOWN;
2922 if (h == NULL && local_got_offsets)
2923 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2924 else if (h != NULL)
2925 tls_type = elf_s390_hash_entry(h)->tls_type;
2926
2927 if (tls_type == GOT_TLS_GD)
2928 continue;
2929
2930 if (r_type == R_390_TLS_LOAD)
2931 {
2932 if (!info->shared && (h == NULL || h->dynindx == -1))
2933 {
2934 /* IE->LE transition. Four valid cases:
2935 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2936 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2937 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2938 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2939 unsigned int insn, ry;
2940
2941 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2942 ry = 0;
2943 if ((insn & 0xff00f000) == 0x58000000)
2944 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2945 ry = (insn & 0x000f0000);
2946 else if ((insn & 0xff0f0000) == 0x58000000)
2947 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2948 ry = (insn & 0x0000f000) << 4;
2949 else if ((insn & 0xff00f000) == 0x5800c000)
2950 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2951 ry = (insn & 0x000f0000);
2952 else if ((insn & 0xff0f0000) == 0x580c0000)
2953 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2954 ry = (insn & 0x0000f000) << 4;
2955 else
2956 invalid_tls_insn (input_bfd, input_section, rel);
2957 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2958 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2959 }
2960 }
2961 else if (r_type == R_390_TLS_GDCALL)
2962 {
2963 unsigned int insn;
2964
2965 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2966 if ((insn & 0xff000fff) != 0x4d000000)
2967 invalid_tls_insn (input_bfd, input_section, rel);
2968 if (!info->shared && (h == NULL || h->dynindx == -1))
2969 /* GD->LE transition.
2970 bas %r14,0(%rx,%r13) -> bc 0,0 */
2971 insn = 0x47000000;
2972 else
2973 /* GD->IE transition.
2974 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2975 insn = 0x5822c000;
2976 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2977 }
2978 else if (r_type == R_390_TLS_LDCALL)
2979 {
2980 if (!info->shared)
2981 {
2982 unsigned int insn;
2983
2984 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2985 if ((insn & 0xff000fff) != 0x4d000000)
2986 invalid_tls_insn (input_bfd, input_section, rel);
2987 /* LD->LE transition.
2988 bas %r14,0(%rx,%r13) -> bc 0,0 */
2989 insn = 0x47000000;
2990 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2991 }
2992 }
2993 continue;
2994
2995 default:
2996 break;
2997 }
2998
2999 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3000 because such sections are not SEC_ALLOC and thus ld.so will
3001 not process them. */
3002 if (unresolved_reloc
3003 && !((input_section->flags & SEC_DEBUGGING) != 0
3004 && h->def_dynamic))
3005 (*_bfd_error_handler)
3006 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3007 input_bfd,
3008 input_section,
3009 (long) rel->r_offset,
3010 h->root.root.string);
3011
3012 if (r_type == R_390_20
3013 || r_type == R_390_GOT20
3014 || r_type == R_390_GOTPLT20
3015 || r_type == R_390_TLS_GOTIE20)
3016 {
3017 relocation += rel->r_addend;
3018 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3019 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3020 contents, rel->r_offset,
3021 relocation, 0);
3022 }
3023 else
3024 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3025 contents, rel->r_offset,
3026 relocation, rel->r_addend);
3027
3028 if (r != bfd_reloc_ok)
3029 {
3030 const char *name;
3031
3032 if (h != NULL)
3033 name = h->root.root.string;
3034 else
3035 {
3036 name = bfd_elf_string_from_elf_section (input_bfd,
3037 symtab_hdr->sh_link,
3038 sym->st_name);
3039 if (name == NULL)
3040 return FALSE;
3041 if (*name == '\0')
3042 name = bfd_section_name (input_bfd, sec);
3043 }
3044
3045 if (r == bfd_reloc_overflow)
3046 {
3047
3048 if (! ((*info->callbacks->reloc_overflow)
3049 (info, (h ? &h->root : NULL), name, howto->name,
3050 (bfd_vma) 0, input_bfd, input_section,
3051 rel->r_offset)))
3052 return FALSE;
3053 }
3054 else
3055 {
3056 (*_bfd_error_handler)
3057 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3058 input_bfd, input_section,
3059 (long) rel->r_offset, name, (int) r);
3060 return FALSE;
3061 }
3062 }
3063 }
3064
3065 return TRUE;
3066 }
3067
3068 /* Finish up dynamic symbol handling. We set the contents of various
3069 dynamic sections here. */
3070
3071 static bfd_boolean
3072 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3073 bfd *output_bfd;
3074 struct bfd_link_info *info;
3075 struct elf_link_hash_entry *h;
3076 Elf_Internal_Sym *sym;
3077 {
3078 struct elf_s390_link_hash_table *htab;
3079
3080 htab = elf_s390_hash_table (info);
3081
3082 if (h->plt.offset != (bfd_vma) -1)
3083 {
3084 bfd_vma plt_index;
3085 bfd_vma got_offset;
3086 Elf_Internal_Rela rela;
3087 bfd_byte *loc;
3088 bfd_vma relative_offset;
3089
3090 /* This symbol has an entry in the procedure linkage table. Set
3091 it up. */
3092 if (h->dynindx == -1
3093 || htab->splt == NULL
3094 || htab->sgotplt == NULL
3095 || htab->srelplt == NULL)
3096 abort ();
3097
3098 /* Calc. index no.
3099 Current offset - size first entry / entry size. */
3100 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3101
3102 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3103 addr & GOT addr. */
3104 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3105
3106 /* S390 uses halfwords for relative branch calc! */
3107 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3108 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3109 /* If offset is > 32768, branch to a previous branch
3110 390 can only handle +-64 K jumps. */
3111 if ( -32768 > (int) relative_offset )
3112 relative_offset
3113 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3114
3115 /* Fill in the entry in the procedure linkage table. */
3116 if (!info->shared)
3117 {
3118 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3119 htab->splt->contents + h->plt.offset);
3120 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3121 htab->splt->contents + h->plt.offset + 4);
3122 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3123 htab->splt->contents + h->plt.offset + 8);
3124 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3125 htab->splt->contents + h->plt.offset + 12);
3126 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3127 htab->splt->contents + h->plt.offset + 16);
3128 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3129 htab->splt->contents + h->plt.offset + 20);
3130 bfd_put_32 (output_bfd,
3131 (htab->sgotplt->output_section->vma
3132 + htab->sgotplt->output_offset
3133 + got_offset),
3134 htab->splt->contents + h->plt.offset + 24);
3135 }
3136 else if (got_offset < 4096)
3137 {
3138 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3139 htab->splt->contents + h->plt.offset);
3140 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3141 htab->splt->contents + h->plt.offset + 4);
3142 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3143 htab->splt->contents + h->plt.offset + 8);
3144 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3145 htab->splt->contents + h->plt.offset + 12);
3146 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3147 htab->splt->contents + h->plt.offset + 16);
3148 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3149 htab->splt->contents + h->plt.offset + 20);
3150 bfd_put_32 (output_bfd, (bfd_vma) 0,
3151 htab->splt->contents + h->plt.offset + 24);
3152 }
3153 else if (got_offset < 32768)
3154 {
3155 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3156 htab->splt->contents + h->plt.offset);
3157 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3158 htab->splt->contents + h->plt.offset + 4);
3159 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3160 htab->splt->contents + h->plt.offset + 8);
3161 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3162 htab->splt->contents + h->plt.offset + 12);
3163 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3164 htab->splt->contents + h->plt.offset + 16);
3165 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3166 htab->splt->contents + h->plt.offset + 20);
3167 bfd_put_32 (output_bfd, (bfd_vma) 0,
3168 htab->splt->contents + h->plt.offset + 24);
3169 }
3170 else
3171 {
3172 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3173 htab->splt->contents + h->plt.offset);
3174 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3175 htab->splt->contents + h->plt.offset + 4);
3176 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3177 htab->splt->contents + h->plt.offset + 8);
3178 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3179 htab->splt->contents + h->plt.offset + 12);
3180 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3181 htab->splt->contents + h->plt.offset + 16);
3182 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3183 htab->splt->contents + h->plt.offset + 20);
3184 bfd_put_32 (output_bfd, got_offset,
3185 htab->splt->contents + h->plt.offset + 24);
3186 }
3187 /* Insert offset into reloc. table here. */
3188 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3189 htab->splt->contents + h->plt.offset + 28);
3190
3191 /* Fill in the entry in the global offset table.
3192 Points to instruction after GOT offset. */
3193 bfd_put_32 (output_bfd,
3194 (htab->splt->output_section->vma
3195 + htab->splt->output_offset
3196 + h->plt.offset
3197 + 12),
3198 htab->sgotplt->contents + got_offset);
3199
3200 /* Fill in the entry in the .rela.plt section. */
3201 rela.r_offset = (htab->sgotplt->output_section->vma
3202 + htab->sgotplt->output_offset
3203 + got_offset);
3204 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3205 rela.r_addend = 0;
3206 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3207 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3208
3209 if (!h->def_regular)
3210 {
3211 /* Mark the symbol as undefined, rather than as defined in
3212 the .plt section. Leave the value alone. This is a clue
3213 for the dynamic linker, to make function pointer
3214 comparisons work between an application and shared
3215 library. */
3216 sym->st_shndx = SHN_UNDEF;
3217 }
3218 }
3219
3220 if (h->got.offset != (bfd_vma) -1
3221 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3222 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3223 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3224 {
3225 Elf_Internal_Rela rela;
3226 bfd_byte *loc;
3227
3228 /* This symbol has an entry in the global offset table. Set it
3229 up. */
3230
3231 if (htab->sgot == NULL || htab->srelgot == NULL)
3232 abort ();
3233
3234 rela.r_offset = (htab->sgot->output_section->vma
3235 + htab->sgot->output_offset
3236 + (h->got.offset &~ (bfd_vma) 1));
3237
3238 /* If this is a static link, or it is a -Bsymbolic link and the
3239 symbol is defined locally or was forced to be local because
3240 of a version file, we just want to emit a RELATIVE reloc.
3241 The entry in the global offset table will already have been
3242 initialized in the relocate_section function. */
3243 if (info->shared
3244 && (info->symbolic
3245 || h->dynindx == -1
3246 || h->forced_local)
3247 && h->def_regular)
3248 {
3249 BFD_ASSERT((h->got.offset & 1) != 0);
3250 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3251 rela.r_addend = (h->root.u.def.value
3252 + h->root.u.def.section->output_section->vma
3253 + h->root.u.def.section->output_offset);
3254 }
3255 else
3256 {
3257 BFD_ASSERT((h->got.offset & 1) == 0);
3258 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3259 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3260 rela.r_addend = 0;
3261 }
3262
3263 loc = htab->srelgot->contents;
3264 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3265 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3266 }
3267
3268 if (h->needs_copy)
3269 {
3270 Elf_Internal_Rela rela;
3271 bfd_byte *loc;
3272
3273 /* This symbols needs a copy reloc. Set it up. */
3274
3275 if (h->dynindx == -1
3276 || (h->root.type != bfd_link_hash_defined
3277 && h->root.type != bfd_link_hash_defweak)
3278 || htab->srelbss == NULL)
3279 abort ();
3280
3281 rela.r_offset = (h->root.u.def.value
3282 + h->root.u.def.section->output_section->vma
3283 + h->root.u.def.section->output_offset);
3284 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3285 rela.r_addend = 0;
3286 loc = htab->srelbss->contents;
3287 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3288 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3289 }
3290
3291 /* Mark some specially defined symbols as absolute. */
3292 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3293 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3294 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3295 sym->st_shndx = SHN_ABS;
3296
3297 return TRUE;
3298 }
3299
3300 /* Used to decide how to sort relocs in an optimal manner for the
3301 dynamic linker, before writing them out. */
3302
3303 static enum elf_reloc_type_class
3304 elf_s390_reloc_type_class (rela)
3305 const Elf_Internal_Rela *rela;
3306 {
3307 switch ((int) ELF32_R_TYPE (rela->r_info))
3308 {
3309 case R_390_RELATIVE:
3310 return reloc_class_relative;
3311 case R_390_JMP_SLOT:
3312 return reloc_class_plt;
3313 case R_390_COPY:
3314 return reloc_class_copy;
3315 default:
3316 return reloc_class_normal;
3317 }
3318 }
3319
3320 /* Finish up the dynamic sections. */
3321
3322 static bfd_boolean
3323 elf_s390_finish_dynamic_sections (output_bfd, info)
3324 bfd *output_bfd;
3325 struct bfd_link_info *info;
3326 {
3327 struct elf_s390_link_hash_table *htab;
3328 bfd *dynobj;
3329 asection *sdyn;
3330
3331 htab = elf_s390_hash_table (info);
3332 dynobj = htab->elf.dynobj;
3333 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3334
3335 if (htab->elf.dynamic_sections_created)
3336 {
3337 Elf32_External_Dyn *dyncon, *dynconend;
3338
3339 if (sdyn == NULL || htab->sgot == NULL)
3340 abort ();
3341
3342 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3343 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3344 for (; dyncon < dynconend; dyncon++)
3345 {
3346 Elf_Internal_Dyn dyn;
3347 asection *s;
3348
3349 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3350
3351 switch (dyn.d_tag)
3352 {
3353 default:
3354 continue;
3355
3356 case DT_PLTGOT:
3357 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3358 break;
3359
3360 case DT_JMPREL:
3361 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3362 break;
3363
3364 case DT_PLTRELSZ:
3365 s = htab->srelplt->output_section;
3366 dyn.d_un.d_val = s->size;
3367 break;
3368 }
3369
3370 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3371 }
3372
3373 /* Fill in the special first entry in the procedure linkage table. */
3374 if (htab->splt && htab->splt->size > 0)
3375 {
3376 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3377 if (info->shared)
3378 {
3379 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3380 htab->splt->contents );
3381 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3382 htab->splt->contents +4 );
3383 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3384 htab->splt->contents +8 );
3385 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3386 htab->splt->contents +12 );
3387 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3388 htab->splt->contents +16 );
3389 }
3390 else
3391 {
3392 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3393 htab->splt->contents );
3394 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3395 htab->splt->contents +4 );
3396 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3397 htab->splt->contents +8 );
3398 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3399 htab->splt->contents +12 );
3400 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3401 htab->splt->contents +16 );
3402 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3403 htab->splt->contents +20 );
3404 bfd_put_32 (output_bfd,
3405 htab->sgotplt->output_section->vma
3406 + htab->sgotplt->output_offset,
3407 htab->splt->contents + 24);
3408 }
3409 elf_section_data (htab->splt->output_section)
3410 ->this_hdr.sh_entsize = 4;
3411 }
3412
3413 }
3414
3415 if (htab->sgotplt)
3416 {
3417 /* Fill in the first three entries in the global offset table. */
3418 if (htab->sgotplt->size > 0)
3419 {
3420 bfd_put_32 (output_bfd,
3421 (sdyn == NULL ? (bfd_vma) 0
3422 : sdyn->output_section->vma + sdyn->output_offset),
3423 htab->sgotplt->contents);
3424 /* One entry for shared object struct ptr. */
3425 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3426 /* One entry for _dl_runtime_resolve. */
3427 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3428 }
3429
3430 elf_section_data (htab->sgotplt->output_section)
3431 ->this_hdr.sh_entsize = 4;
3432 }
3433 return TRUE;
3434 }
3435
3436 static bfd_boolean
3437 elf_s390_grok_prstatus (abfd, note)
3438 bfd * abfd;
3439 Elf_Internal_Note * note;
3440 {
3441 int offset;
3442 unsigned int size;
3443
3444 switch (note->descsz)
3445 {
3446 default:
3447 return FALSE;
3448
3449 case 224: /* S/390 Linux. */
3450 /* pr_cursig */
3451 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3452
3453 /* pr_pid */
3454 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3455
3456 /* pr_reg */
3457 offset = 72;
3458 size = 144;
3459 break;
3460 }
3461
3462 /* Make a ".reg/999" section. */
3463 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3464 size, note->descpos + offset);
3465 }
3466
3467 /* Return address for Ith PLT stub in section PLT, for relocation REL
3468 or (bfd_vma) -1 if it should not be included. */
3469
3470 static bfd_vma
3471 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3472 const arelent *rel ATTRIBUTE_UNUSED)
3473 {
3474 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3475 }
3476
3477
3478 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3479 #define TARGET_BIG_NAME "elf32-s390"
3480 #define ELF_ARCH bfd_arch_s390
3481 #define ELF_MACHINE_CODE EM_S390
3482 #define ELF_MACHINE_ALT1 EM_S390_OLD
3483 #define ELF_MAXPAGESIZE 0x1000
3484
3485 #define elf_backend_can_gc_sections 1
3486 #define elf_backend_can_refcount 1
3487 #define elf_backend_want_got_plt 1
3488 #define elf_backend_plt_readonly 1
3489 #define elf_backend_want_plt_sym 0
3490 #define elf_backend_got_header_size 12
3491 #define elf_backend_rela_normal 1
3492
3493 #define elf_info_to_howto elf_s390_info_to_howto
3494
3495 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3496 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3497 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3498
3499 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3500 #define elf_backend_check_relocs elf_s390_check_relocs
3501 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3502 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3503 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3504 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3505 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3506 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3507 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3508 #define elf_backend_relocate_section elf_s390_relocate_section
3509 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3510 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3511 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3512 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3513
3514 #define bfd_elf32_mkobject elf_s390_mkobject
3515 #define elf_backend_object_p elf_s390_object_p
3516
3517 #include "elf32-target.h"
GDB Binutils - Deliverables
This page took 0.126928 seconds and 4 git commands to generate.