?  search:
summary | log | graphiclog1 | graphiclog2 | commit | commitdiff | tree | refs | edit | fork
blame | history | raw | HEAD
* config/mt-gnu (CXXFLAGS): Include SYSROOT_CFLAGS_FOR_TARGET.
[binutils.git] / bfd / elf32-s390.c
blob713ad66acde0613258c134bd05df570b69f75857
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 || s == htab->sdynbss)
2110 {
2111 /* Strip this section if we don't need it; see the
2112 comment below. */
2113 }
2114 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2115 {
2116 if (s->size != 0)
2117 relocs = TRUE;
2118
2119 /* We use the reloc_count field as a counter if we need
2120 to copy relocs into the output file. */
2121 s->reloc_count = 0;
2122 }
2123 else
2124 {
2125 /* It's not one of our sections, so don't allocate space. */
2126 continue;
2127 }
2128
2129 if (s->size == 0)
2130 {
2131 /* If we don't need this section, strip it from the
2132 output file. This is to handle .rela.bss and
2133 .rela.plt. We must create it in
2134 create_dynamic_sections, because it must be created
2135 before the linker maps input sections to output
2136 sections. The linker does that before
2137 adjust_dynamic_symbol is called, and it is that
2138 function which decides whether anything needs to go
2139 into these sections. */
2140
2141 s->flags |= SEC_EXCLUDE;
2142 continue;
2143 }
2144
2145 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2146 continue;
2147
2148 /* Allocate memory for the section contents. We use bfd_zalloc
2149 here in case unused entries are not reclaimed before the
2150 section's contents are written out. This should not happen,
2151 but this way if it does, we get a R_390_NONE reloc instead
2152 of garbage. */
2153 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2154 if (s->contents == NULL)
2155 return FALSE;
2156 }
2157
2158 if (htab->elf.dynamic_sections_created)
2159 {
2160 /* Add some entries to the .dynamic section. We fill in the
2161 values later, in elf_s390_finish_dynamic_sections, but we
2162 must add the entries now so that we get the correct size for
2163 the .dynamic section. The DT_DEBUG entry is filled in by the
2164 dynamic linker and used by the debugger. */
2165 #define add_dynamic_entry(TAG, VAL) \
2166 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2167
2168 if (info->executable)
2169 {
2170 if (!add_dynamic_entry (DT_DEBUG, 0))
2171 return FALSE;
2172 }
2173
2174 if (htab->splt->size != 0)
2175 {
2176 if (!add_dynamic_entry (DT_PLTGOT, 0)
2177 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2178 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2179 || !add_dynamic_entry (DT_JMPREL, 0))
2180 return FALSE;
2181 }
2182
2183 if (relocs)
2184 {
2185 if (!add_dynamic_entry (DT_RELA, 0)
2186 || !add_dynamic_entry (DT_RELASZ, 0)
2187 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2188 return FALSE;
2189
2190 /* If any dynamic relocs apply to a read-only section,
2191 then we need a DT_TEXTREL entry. */
2192 if ((info->flags & DF_TEXTREL) == 0)
2193 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2194 (PTR) info);
2195
2196 if ((info->flags & DF_TEXTREL) != 0)
2197 {
2198 if (!add_dynamic_entry (DT_TEXTREL, 0))
2199 return FALSE;
2200 }
2201 }
2202 }
2203 #undef add_dynamic_entry
2204
2205 return TRUE;
2206 }
2207
2208 /* Return the base VMA address which should be subtracted from real addresses
2209 when resolving @dtpoff relocation.
2210 This is PT_TLS segment p_vaddr. */
2211
2212 static bfd_vma
2213 dtpoff_base (info)
2214 struct bfd_link_info *info;
2215 {
2216 /* If tls_sec is NULL, we should have signalled an error already. */
2217 if (elf_hash_table (info)->tls_sec == NULL)
2218 return 0;
2219 return elf_hash_table (info)->tls_sec->vma;
2220 }
2221
2222 /* Return the relocation value for @tpoff relocation
2223 if STT_TLS virtual address is ADDRESS. */
2224
2225 static bfd_vma
2226 tpoff (info, address)
2227 struct bfd_link_info *info;
2228 bfd_vma address;
2229 {
2230 struct elf_link_hash_table *htab = elf_hash_table (info);
2231
2232 /* If tls_sec is NULL, we should have signalled an error already. */
2233 if (htab->tls_sec == NULL)
2234 return 0;
2235 return htab->tls_size + htab->tls_sec->vma - address;
2236 }
2237
2238 /* Complain if TLS instruction relocation is against an invalid
2239 instruction. */
2240
2241 static void
2242 invalid_tls_insn (input_bfd, input_section, rel)
2243 bfd *input_bfd;
2244 asection *input_section;
2245 Elf_Internal_Rela *rel;
2246 {
2247 reloc_howto_type *howto;
2248
2249 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2250 (*_bfd_error_handler)
2251 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2252 input_bfd,
2253 input_section,
2254 (long) rel->r_offset,
2255 howto->name);
2256 }
2257
2258 /* Relocate a 390 ELF section. */
2259
2260 static bfd_boolean
2261 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2262 contents, relocs, local_syms, local_sections)
2263 bfd *output_bfd;
2264 struct bfd_link_info *info;
2265 bfd *input_bfd;
2266 asection *input_section;
2267 bfd_byte *contents;
2268 Elf_Internal_Rela *relocs;
2269 Elf_Internal_Sym *local_syms;
2270 asection **local_sections;
2271 {
2272 struct elf_s390_link_hash_table *htab;
2273 Elf_Internal_Shdr *symtab_hdr;
2274 struct elf_link_hash_entry **sym_hashes;
2275 bfd_vma *local_got_offsets;
2276 Elf_Internal_Rela *rel;
2277 Elf_Internal_Rela *relend;
2278
2279 if (info->relocatable)
2280 return TRUE;
2281
2282 htab = elf_s390_hash_table (info);
2283 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2284 sym_hashes = elf_sym_hashes (input_bfd);
2285 local_got_offsets = elf_local_got_offsets (input_bfd);
2286
2287 rel = relocs;
2288 relend = relocs + input_section->reloc_count;
2289 for (; rel < relend; rel++)
2290 {
2291 unsigned int r_type;
2292 reloc_howto_type *howto;
2293 unsigned long r_symndx;
2294 struct elf_link_hash_entry *h;
2295 Elf_Internal_Sym *sym;
2296 asection *sec;
2297 bfd_vma off;
2298 bfd_vma relocation;
2299 bfd_boolean unresolved_reloc;
2300 bfd_reloc_status_type r;
2301 int tls_type;
2302
2303 r_type = ELF32_R_TYPE (rel->r_info);
2304 if (r_type == (int) R_390_GNU_VTINHERIT
2305 || r_type == (int) R_390_GNU_VTENTRY)
2306 continue;
2307 if (r_type >= (int) R_390_max)
2308 {
2309 bfd_set_error (bfd_error_bad_value);
2310 return FALSE;
2311 }
2312
2313 howto = elf_howto_table + r_type;
2314 r_symndx = ELF32_R_SYM (rel->r_info);
2315
2316 /* This is a final link. */
2317 h = NULL;
2318 sym = NULL;
2319 sec = NULL;
2320 unresolved_reloc = FALSE;
2321 if (r_symndx < symtab_hdr->sh_info)
2322 {
2323 sym = local_syms + r_symndx;
2324 sec = local_sections[r_symndx];
2325 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2326 }
2327 else
2328 {
2329 bfd_boolean warned ATTRIBUTE_UNUSED;
2330
2331 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2332 r_symndx, symtab_hdr, sym_hashes,
2333 h, sec, relocation,
2334 unresolved_reloc, warned);
2335 }
2336
2337 switch (r_type)
2338 {
2339 case R_390_GOTPLT12:
2340 case R_390_GOTPLT16:
2341 case R_390_GOTPLT20:
2342 case R_390_GOTPLT32:
2343 case R_390_GOTPLTENT:
2344 /* There are three cases for a GOTPLT relocation. 1) The
2345 relocation is against the jump slot entry of a plt that
2346 will get emitted to the output file. 2) The relocation
2347 is against the jump slot of a plt entry that has been
2348 removed. elf_s390_adjust_gotplt has created a GOT entry
2349 as replacement. 3) The relocation is against a local symbol.
2350 Cases 2) and 3) are the same as the GOT relocation code
2351 so we just have to test for case 1 and fall through for
2352 the other two. */
2353 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2354 {
2355 bfd_vma plt_index;
2356
2357 /* Calc. index no.
2358 Current offset - size first entry / entry size. */
2359 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2360 PLT_ENTRY_SIZE;
2361
2362 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2363 addr & GOT addr. */
2364 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2365 unresolved_reloc = FALSE;
2366
2367 if (r_type == R_390_GOTPLTENT)
2368 relocation += htab->sgot->output_section->vma;
2369 break;
2370 }
2371 /* Fall through. */
2372
2373 case R_390_GOT12:
2374 case R_390_GOT16:
2375 case R_390_GOT20:
2376 case R_390_GOT32:
2377 case R_390_GOTENT:
2378 /* Relocation is to the entry for this symbol in the global
2379 offset table. */
2380 if (htab->sgot == NULL)
2381 abort ();
2382
2383 if (h != NULL)
2384 {
2385 bfd_boolean dyn;
2386
2387 off = h->got.offset;
2388 dyn = htab->elf.dynamic_sections_created;
2389 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2390 || (info->shared
2391 && (info->symbolic
2392 || h->dynindx == -1
2393 || h->forced_local)
2394 && h->def_regular)
2395 || (ELF_ST_VISIBILITY (h->other)
2396 && h->root.type == bfd_link_hash_undefweak))
2397 {
2398 /* This is actually a static link, or it is a
2399 -Bsymbolic link and the symbol is defined
2400 locally, or the symbol was forced to be local
2401 because of a version file. We must initialize
2402 this entry in the global offset table. Since the
2403 offset must always be a multiple of 2, we use the
2404 least significant bit to record whether we have
2405 initialized it already.
2406
2407 When doing a dynamic link, we create a .rel.got
2408 relocation entry to initialize the value. This
2409 is done in the finish_dynamic_symbol routine. */
2410 if ((off & 1) != 0)
2411 off &= ~1;
2412 else
2413 {
2414 bfd_put_32 (output_bfd, relocation,
2415 htab->sgot->contents + off);
2416 h->got.offset |= 1;
2417 }
2418 }
2419 else
2420 unresolved_reloc = FALSE;
2421 }
2422 else
2423 {
2424 if (local_got_offsets == NULL)
2425 abort ();
2426
2427 off = local_got_offsets[r_symndx];
2428
2429 /* The offset must always be a multiple of 4. We use
2430 the least significant bit to record whether we have
2431 already generated the necessary reloc. */
2432 if ((off & 1) != 0)
2433 off &= ~1;
2434 else
2435 {
2436 bfd_put_32 (output_bfd, relocation,
2437 htab->sgot->contents + off);
2438
2439 if (info->shared)
2440 {
2441 asection *srelgot;
2442 Elf_Internal_Rela outrel;
2443 bfd_byte *loc;
2444
2445 srelgot = htab->srelgot;
2446 if (srelgot == NULL)
2447 abort ();
2448
2449 outrel.r_offset = (htab->sgot->output_section->vma
2450 + htab->sgot->output_offset
2451 + off);
2452 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2453 outrel.r_addend = relocation;
2454 loc = srelgot->contents;
2455 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2456 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2457 }
2458
2459 local_got_offsets[r_symndx] |= 1;
2460 }
2461 }
2462
2463 if (off >= (bfd_vma) -2)
2464 abort ();
2465
2466 relocation = htab->sgot->output_offset + off;
2467
2468 /* For @GOTENT the relocation is against the offset between
2469 the instruction and the symbols entry in the GOT and not
2470 between the start of the GOT and the symbols entry. We
2471 add the vma of the GOT to get the correct value. */
2472 if ( r_type == R_390_GOTENT
2473 || r_type == R_390_GOTPLTENT)
2474 relocation += htab->sgot->output_section->vma;
2475
2476 break;
2477
2478 case R_390_GOTOFF16:
2479 case R_390_GOTOFF32:
2480 /* Relocation is relative to the start of the global offset
2481 table. */
2482
2483 /* Note that sgot->output_offset is not involved in this
2484 calculation. We always want the start of .got. If we
2485 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2486 permitted by the ABI, we might have to change this
2487 calculation. */
2488 relocation -= htab->sgot->output_section->vma;
2489 break;
2490
2491 case R_390_GOTPC:
2492 case R_390_GOTPCDBL:
2493 /* Use global offset table as symbol value. */
2494 relocation = htab->sgot->output_section->vma;
2495 unresolved_reloc = FALSE;
2496 break;
2497
2498 case R_390_PLT16DBL:
2499 case R_390_PLT32DBL:
2500 case R_390_PLT32:
2501 /* Relocation is to the entry for this symbol in the
2502 procedure linkage table. */
2503
2504 /* Resolve a PLT32 reloc against a local symbol directly,
2505 without using the procedure linkage table. */
2506 if (h == NULL)
2507 break;
2508
2509 if (h->plt.offset == (bfd_vma) -1
2510 || htab->splt == NULL)
2511 {
2512 /* We didn't make a PLT entry for this symbol. This
2513 happens when statically linking PIC code, or when
2514 using -Bsymbolic. */
2515 break;
2516 }
2517
2518 relocation = (htab->splt->output_section->vma
2519 + htab->splt->output_offset
2520 + h->plt.offset);
2521 unresolved_reloc = FALSE;
2522 break;
2523
2524 case R_390_PLTOFF16:
2525 case R_390_PLTOFF32:
2526 /* Relocation is to the entry for this symbol in the
2527 procedure linkage table relative to the start of the GOT. */
2528
2529 /* For local symbols or if we didn't make a PLT entry for
2530 this symbol resolve the symbol directly. */
2531 if ( h == NULL
2532 || h->plt.offset == (bfd_vma) -1
2533 || htab->splt == NULL)
2534 {
2535 relocation -= htab->sgot->output_section->vma;
2536 break;
2537 }
2538
2539 relocation = (htab->splt->output_section->vma
2540 + htab->splt->output_offset
2541 + h->plt.offset
2542 - htab->sgot->output_section->vma);
2543 unresolved_reloc = FALSE;
2544 break;
2545
2546 case R_390_8:
2547 case R_390_16:
2548 case R_390_32:
2549 case R_390_PC16:
2550 case R_390_PC16DBL:
2551 case R_390_PC32DBL:
2552 case R_390_PC32:
2553 /* r_symndx will be zero only for relocs against symbols
2554 from removed linkonce sections, or sections discarded by
2555 a linker script. */
2556 if (r_symndx == 0
2557 || (input_section->flags & SEC_ALLOC) == 0)
2558 break;
2559
2560 if ((info->shared
2561 && (h == NULL
2562 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2563 || h->root.type != bfd_link_hash_undefweak)
2564 && ((r_type != R_390_PC16
2565 && r_type != R_390_PC16DBL
2566 && r_type != R_390_PC32DBL
2567 && r_type != R_390_PC32)
2568 || (h != NULL
2569 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2570 || (ELIMINATE_COPY_RELOCS
2571 && !info->shared
2572 && h != NULL
2573 && h->dynindx != -1
2574 && !h->non_got_ref
2575 && ((h->def_dynamic
2576 && !h->def_regular)
2577 || h->root.type == bfd_link_hash_undefweak
2578 || h->root.type == bfd_link_hash_undefined)))
2579 {
2580 Elf_Internal_Rela outrel;
2581 bfd_boolean skip, relocate;
2582 asection *sreloc;
2583 bfd_byte *loc;
2584
2585 /* When generating a shared object, these relocations
2586 are copied into the output file to be resolved at run
2587 time. */
2588
2589 skip = FALSE;
2590 relocate = FALSE;
2591
2592 outrel.r_offset =
2593 _bfd_elf_section_offset (output_bfd, info, input_section,
2594 rel->r_offset);
2595 if (outrel.r_offset == (bfd_vma) -1)
2596 skip = TRUE;
2597 else if (outrel.r_offset == (bfd_vma) -2)
2598 skip = TRUE, relocate = TRUE;
2599 outrel.r_offset += (input_section->output_section->vma
2600 + input_section->output_offset);
2601
2602 if (skip)
2603 memset (&outrel, 0, sizeof outrel);
2604 else if (h != NULL
2605 && h->dynindx != -1
2606 && (r_type == R_390_PC16
2607 || r_type == R_390_PC16DBL
2608 || r_type == R_390_PC32DBL
2609 || r_type == R_390_PC32
2610 || !info->shared
2611 || !info->symbolic
2612 || !h->def_regular))
2613 {
2614 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2615 outrel.r_addend = rel->r_addend;
2616 }
2617 else
2618 {
2619 /* This symbol is local, or marked to become local. */
2620 outrel.r_addend = relocation + rel->r_addend;
2621 if (r_type == R_390_32)
2622 {
2623 relocate = TRUE;
2624 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2625 }
2626 else
2627 {
2628 long sindx;
2629
2630 if (bfd_is_abs_section (sec))
2631 sindx = 0;
2632 else if (sec == NULL || sec->owner == NULL)
2633 {
2634 bfd_set_error(bfd_error_bad_value);
2635 return FALSE;
2636 }
2637 else
2638 {
2639 asection *osec;
2640
2641 osec = sec->output_section;
2642 sindx = elf_section_data (osec)->dynindx;
2643 BFD_ASSERT (sindx > 0);
2644
2645 /* We are turning this relocation into one
2646 against a section symbol, so subtract out
2647 the output section's address but not the
2648 offset of the input section in the output
2649 section. */
2650
2651 outrel.r_addend -= osec->vma;
2652 }
2653 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2654 }
2655 }
2656
2657 sreloc = elf_section_data (input_section)->sreloc;
2658 if (sreloc == NULL)
2659 abort ();
2660
2661 loc = sreloc->contents;
2662 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2663 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2664
2665 /* If this reloc is against an external symbol, we do
2666 not want to fiddle with the addend. Otherwise, we
2667 need to include the symbol value so that it becomes
2668 an addend for the dynamic reloc. */
2669 if (! relocate)
2670 continue;
2671 }
2672 break;
2673
2674 /* Relocations for tls literal pool entries. */
2675 case R_390_TLS_IE32:
2676 if (info->shared)
2677 {
2678 Elf_Internal_Rela outrel;
2679 asection *sreloc;
2680 bfd_byte *loc;
2681
2682 outrel.r_offset = rel->r_offset
2683 + input_section->output_section->vma
2684 + input_section->output_offset;
2685 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2686 sreloc = elf_section_data (input_section)->sreloc;
2687 if (sreloc == NULL)
2688 abort ();
2689 loc = sreloc->contents;
2690 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2691 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2692 }
2693 /* Fall through. */
2694
2695 case R_390_TLS_GD32:
2696 case R_390_TLS_GOTIE32:
2697 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2698 tls_type = GOT_UNKNOWN;
2699 if (h == NULL && local_got_offsets)
2700 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2701 else if (h != NULL)
2702 {
2703 tls_type = elf_s390_hash_entry(h)->tls_type;
2704 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2705 r_type = R_390_TLS_LE32;
2706 }
2707 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2708 r_type = R_390_TLS_IE32;
2709
2710 if (r_type == R_390_TLS_LE32)
2711 {
2712 /* This relocation gets optimized away by the local exec
2713 access optimization. */
2714 BFD_ASSERT (! unresolved_reloc);
2715 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2716 contents + rel->r_offset);
2717 continue;
2718 }
2719
2720 if (htab->sgot == NULL)
2721 abort ();
2722
2723 if (h != NULL)
2724 off = h->got.offset;
2725 else
2726 {
2727 if (local_got_offsets == NULL)
2728 abort ();
2729
2730 off = local_got_offsets[r_symndx];
2731 }
2732
2733 emit_tls_relocs:
2734
2735 if ((off & 1) != 0)
2736 off &= ~1;
2737 else
2738 {
2739 Elf_Internal_Rela outrel;
2740 bfd_byte *loc;
2741 int dr_type, indx;
2742
2743 if (htab->srelgot == NULL)
2744 abort ();
2745
2746 outrel.r_offset = (htab->sgot->output_section->vma
2747 + htab->sgot->output_offset + off);
2748
2749 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2750 if (r_type == R_390_TLS_GD32)
2751 dr_type = R_390_TLS_DTPMOD;
2752 else
2753 dr_type = R_390_TLS_TPOFF;
2754 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2755 outrel.r_addend = relocation - dtpoff_base (info);
2756 else
2757 outrel.r_addend = 0;
2758 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2759 loc = htab->srelgot->contents;
2760 loc += htab->srelgot->reloc_count++
2761 * sizeof (Elf32_External_Rela);
2762 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2763
2764 if (r_type == R_390_TLS_GD32)
2765 {
2766 if (indx == 0)
2767 {
2768 BFD_ASSERT (! unresolved_reloc);
2769 bfd_put_32 (output_bfd,
2770 relocation - dtpoff_base (info),
2771 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2772 }
2773 else
2774 {
2775 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2776 outrel.r_offset += GOT_ENTRY_SIZE;
2777 outrel.r_addend = 0;
2778 htab->srelgot->reloc_count++;
2779 loc += sizeof (Elf32_External_Rela);
2780 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2781 }
2782 }
2783
2784 if (h != NULL)
2785 h->got.offset |= 1;
2786 else
2787 local_got_offsets[r_symndx] |= 1;
2788 }
2789
2790 if (off >= (bfd_vma) -2)
2791 abort ();
2792 if (r_type == ELF32_R_TYPE (rel->r_info))
2793 {
2794 relocation = htab->sgot->output_offset + off;
2795 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2796 relocation += htab->sgot->output_section->vma;
2797 unresolved_reloc = FALSE;
2798 }
2799 else
2800 {
2801 bfd_put_32 (output_bfd, htab->sgot->output_offset + off,
2802 contents + rel->r_offset);
2803 continue;
2804 }
2805 break;
2806
2807 case R_390_TLS_GOTIE12:
2808 case R_390_TLS_GOTIE20:
2809 case R_390_TLS_IEENT:
2810 if (h == NULL)
2811 {
2812 if (local_got_offsets == NULL)
2813 abort();
2814 off = local_got_offsets[r_symndx];
2815 if (info->shared)
2816 goto emit_tls_relocs;
2817 }
2818 else
2819 {
2820 off = h->got.offset;
2821 tls_type = elf_s390_hash_entry(h)->tls_type;
2822 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2823 goto emit_tls_relocs;
2824 }
2825
2826 if (htab->sgot == NULL)
2827 abort ();
2828
2829 BFD_ASSERT (! unresolved_reloc);
2830 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2831 htab->sgot->contents + off);
2832 relocation = htab->sgot->output_offset + off;
2833 if (r_type == R_390_TLS_IEENT)
2834 relocation += htab->sgot->output_section->vma;
2835 unresolved_reloc = FALSE;
2836 break;
2837
2838 case R_390_TLS_LDM32:
2839 if (! info->shared)
2840 /* The literal pool entry this relocation refers to gets ignored
2841 by the optimized code of the local exec model. Do nothing
2842 and the value will turn out zero. */
2843 continue;
2844
2845 if (htab->sgot == NULL)
2846 abort ();
2847
2848 off = htab->tls_ldm_got.offset;
2849 if (off & 1)
2850 off &= ~1;
2851 else
2852 {
2853 Elf_Internal_Rela outrel;
2854 bfd_byte *loc;
2855
2856 if (htab->srelgot == NULL)
2857 abort ();
2858
2859 outrel.r_offset = (htab->sgot->output_section->vma
2860 + htab->sgot->output_offset + off);
2861
2862 bfd_put_32 (output_bfd, 0,
2863 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2864 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
2865 outrel.r_addend = 0;
2866 loc = htab->srelgot->contents;
2867 loc += htab->srelgot->reloc_count++
2868 * sizeof (Elf32_External_Rela);
2869 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2870 htab->tls_ldm_got.offset |= 1;
2871 }
2872 relocation = htab->sgot->output_offset + off;
2873 unresolved_reloc = FALSE;
2874 break;
2875
2876 case R_390_TLS_LE32:
2877 if (info->shared)
2878 {
2879 /* Linking a shared library with non-fpic code requires
2880 a R_390_TLS_TPOFF relocation. */
2881 Elf_Internal_Rela outrel;
2882 asection *sreloc;
2883 bfd_byte *loc;
2884 int indx;
2885
2886 outrel.r_offset = rel->r_offset
2887 + input_section->output_section->vma
2888 + input_section->output_offset;
2889 if (h != NULL && h->dynindx != -1)
2890 indx = h->dynindx;
2891 else
2892 indx = 0;
2893 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
2894 if (indx == 0)
2895 outrel.r_addend = relocation - dtpoff_base (info);
2896 else
2897 outrel.r_addend = 0;
2898 sreloc = elf_section_data (input_section)->sreloc;
2899 if (sreloc == NULL)
2900 abort ();
2901 loc = sreloc->contents;
2902 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2903 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2904 }
2905 else
2906 {
2907 BFD_ASSERT (! unresolved_reloc);
2908 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2909 contents + rel->r_offset);
2910 }
2911 continue;
2912
2913 case R_390_TLS_LDO32:
2914 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2915 relocation -= dtpoff_base (info);
2916 else
2917 /* When converting LDO to LE, we must negate. */
2918 relocation = -tpoff (info, relocation);
2919 break;
2920
2921 /* Relocations for tls instructions. */
2922 case R_390_TLS_LOAD:
2923 case R_390_TLS_GDCALL:
2924 case R_390_TLS_LDCALL:
2925 tls_type = GOT_UNKNOWN;
2926 if (h == NULL && local_got_offsets)
2927 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2928 else if (h != NULL)
2929 tls_type = elf_s390_hash_entry(h)->tls_type;
2930
2931 if (tls_type == GOT_TLS_GD)
2932 continue;
2933
2934 if (r_type == R_390_TLS_LOAD)
2935 {
2936 if (!info->shared && (h == NULL || h->dynindx == -1))
2937 {
2938 /* IE->LE transition. Four valid cases:
2939 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
2940 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
2941 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
2942 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2943 unsigned int insn, ry;
2944
2945 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2946 ry = 0;
2947 if ((insn & 0xff00f000) == 0x58000000)
2948 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
2949 ry = (insn & 0x000f0000);
2950 else if ((insn & 0xff0f0000) == 0x58000000)
2951 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
2952 ry = (insn & 0x0000f000) << 4;
2953 else if ((insn & 0xff00f000) == 0x5800c000)
2954 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
2955 ry = (insn & 0x000f0000);
2956 else if ((insn & 0xff0f0000) == 0x580c0000)
2957 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
2958 ry = (insn & 0x0000f000) << 4;
2959 else
2960 invalid_tls_insn (input_bfd, input_section, rel);
2961 insn = 0x18000700 | (insn & 0x00f00000) | ry;
2962 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2963 }
2964 }
2965 else if (r_type == R_390_TLS_GDCALL)
2966 {
2967 unsigned int insn;
2968
2969 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2970 if ((insn & 0xff000fff) != 0x4d000000)
2971 invalid_tls_insn (input_bfd, input_section, rel);
2972 if (!info->shared && (h == NULL || h->dynindx == -1))
2973 /* GD->LE transition.
2974 bas %r14,0(%rx,%r13) -> bc 0,0 */
2975 insn = 0x47000000;
2976 else
2977 /* GD->IE transition.
2978 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
2979 insn = 0x5822c000;
2980 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2981 }
2982 else if (r_type == R_390_TLS_LDCALL)
2983 {
2984 if (!info->shared)
2985 {
2986 unsigned int insn;
2987
2988 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
2989 if ((insn & 0xff000fff) != 0x4d000000)
2990 invalid_tls_insn (input_bfd, input_section, rel);
2991 /* LD->LE transition.
2992 bas %r14,0(%rx,%r13) -> bc 0,0 */
2993 insn = 0x47000000;
2994 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
2995 }
2996 }
2997 continue;
2998
2999 default:
3000 break;
3001 }
3002
3003 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3004 because such sections are not SEC_ALLOC and thus ld.so will
3005 not process them. */
3006 if (unresolved_reloc
3007 && !((input_section->flags & SEC_DEBUGGING) != 0
3008 && h->def_dynamic))
3009 (*_bfd_error_handler)
3010 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
3011 input_bfd,
3012 input_section,
3013 (long) rel->r_offset,
3014 h->root.root.string);
3015
3016 if (r_type == R_390_20
3017 || r_type == R_390_GOT20
3018 || r_type == R_390_GOTPLT20
3019 || r_type == R_390_TLS_GOTIE20)
3020 {
3021 relocation += rel->r_addend;
3022 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3023 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3024 contents, rel->r_offset,
3025 relocation, 0);
3026 }
3027 else
3028 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3029 contents, rel->r_offset,
3030 relocation, rel->r_addend);
3031
3032 if (r != bfd_reloc_ok)
3033 {
3034 const char *name;
3035
3036 if (h != NULL)
3037 name = h->root.root.string;
3038 else
3039 {
3040 name = bfd_elf_string_from_elf_section (input_bfd,
3041 symtab_hdr->sh_link,
3042 sym->st_name);
3043 if (name == NULL)
3044 return FALSE;
3045 if (*name == '\0')
3046 name = bfd_section_name (input_bfd, sec);
3047 }
3048
3049 if (r == bfd_reloc_overflow)
3050 {
3051
3052 if (! ((*info->callbacks->reloc_overflow)
3053 (info, (h ? &h->root : NULL), name, howto->name,
3054 (bfd_vma) 0, input_bfd, input_section,
3055 rel->r_offset)))
3056 return FALSE;
3057 }
3058 else
3059 {
3060 (*_bfd_error_handler)
3061 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3062 input_bfd, input_section,
3063 (long) rel->r_offset, name, (int) r);
3064 return FALSE;
3065 }
3066 }
3067 }
3068
3069 return TRUE;
3070 }
3071
3072 /* Finish up dynamic symbol handling. We set the contents of various
3073 dynamic sections here. */
3074
3075 static bfd_boolean
3076 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3077 bfd *output_bfd;
3078 struct bfd_link_info *info;
3079 struct elf_link_hash_entry *h;
3080 Elf_Internal_Sym *sym;
3081 {
3082 struct elf_s390_link_hash_table *htab;
3083
3084 htab = elf_s390_hash_table (info);
3085
3086 if (h->plt.offset != (bfd_vma) -1)
3087 {
3088 bfd_vma plt_index;
3089 bfd_vma got_offset;
3090 Elf_Internal_Rela rela;
3091 bfd_byte *loc;
3092 bfd_vma relative_offset;
3093
3094 /* This symbol has an entry in the procedure linkage table. Set
3095 it up. */
3096 if (h->dynindx == -1
3097 || htab->splt == NULL
3098 || htab->sgotplt == NULL
3099 || htab->srelplt == NULL)
3100 abort ();
3101
3102 /* Calc. index no.
3103 Current offset - size first entry / entry size. */
3104 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3105
3106 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3107 addr & GOT addr. */
3108 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3109
3110 /* S390 uses halfwords for relative branch calc! */
3111 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3112 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3113 /* If offset is > 32768, branch to a previous branch
3114 390 can only handle +-64 K jumps. */
3115 if ( -32768 > (int) relative_offset )
3116 relative_offset
3117 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3118
3119 /* Fill in the entry in the procedure linkage table. */
3120 if (!info->shared)
3121 {
3122 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3123 htab->splt->contents + h->plt.offset);
3124 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3125 htab->splt->contents + h->plt.offset + 4);
3126 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3127 htab->splt->contents + h->plt.offset + 8);
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3129 htab->splt->contents + h->plt.offset + 12);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3131 htab->splt->contents + h->plt.offset + 16);
3132 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3133 htab->splt->contents + h->plt.offset + 20);
3134 bfd_put_32 (output_bfd,
3135 (htab->sgotplt->output_section->vma
3136 + htab->sgotplt->output_offset
3137 + got_offset),
3138 htab->splt->contents + h->plt.offset + 24);
3139 }
3140 else if (got_offset < 4096)
3141 {
3142 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD0 + got_offset,
3143 htab->splt->contents + h->plt.offset);
3144 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD1,
3145 htab->splt->contents + h->plt.offset + 4);
3146 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD2,
3147 htab->splt->contents + h->plt.offset + 8);
3148 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD3,
3149 htab->splt->contents + h->plt.offset + 12);
3150 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC12_ENTRY_WORD4,
3151 htab->splt->contents + h->plt.offset + 16);
3152 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3153 htab->splt->contents + h->plt.offset + 20);
3154 bfd_put_32 (output_bfd, (bfd_vma) 0,
3155 htab->splt->contents + h->plt.offset + 24);
3156 }
3157 else if (got_offset < 32768)
3158 {
3159 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD0 + got_offset,
3160 htab->splt->contents + h->plt.offset);
3161 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD1,
3162 htab->splt->contents + h->plt.offset + 4);
3163 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD2,
3164 htab->splt->contents + h->plt.offset + 8);
3165 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD3,
3166 htab->splt->contents + h->plt.offset + 12);
3167 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC16_ENTRY_WORD4,
3168 htab->splt->contents + h->plt.offset + 16);
3169 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3170 htab->splt->contents + h->plt.offset + 20);
3171 bfd_put_32 (output_bfd, (bfd_vma) 0,
3172 htab->splt->contents + h->plt.offset + 24);
3173 }
3174 else
3175 {
3176 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD0,
3177 htab->splt->contents + h->plt.offset);
3178 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD1,
3179 htab->splt->contents + h->plt.offset + 4);
3180 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD2,
3181 htab->splt->contents + h->plt.offset + 8);
3182 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD3,
3183 htab->splt->contents + h->plt.offset + 12);
3184 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_ENTRY_WORD4,
3185 htab->splt->contents + h->plt.offset + 16);
3186 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3187 htab->splt->contents + h->plt.offset + 20);
3188 bfd_put_32 (output_bfd, got_offset,
3189 htab->splt->contents + h->plt.offset + 24);
3190 }
3191 /* Insert offset into reloc. table here. */
3192 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3193 htab->splt->contents + h->plt.offset + 28);
3194
3195 /* Fill in the entry in the global offset table.
3196 Points to instruction after GOT offset. */
3197 bfd_put_32 (output_bfd,
3198 (htab->splt->output_section->vma
3199 + htab->splt->output_offset
3200 + h->plt.offset
3201 + 12),
3202 htab->sgotplt->contents + got_offset);
3203
3204 /* Fill in the entry in the .rela.plt section. */
3205 rela.r_offset = (htab->sgotplt->output_section->vma
3206 + htab->sgotplt->output_offset
3207 + got_offset);
3208 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3209 rela.r_addend = 0;
3210 loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3211 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3212
3213 if (!h->def_regular)
3214 {
3215 /* Mark the symbol as undefined, rather than as defined in
3216 the .plt section. Leave the value alone. This is a clue
3217 for the dynamic linker, to make function pointer
3218 comparisons work between an application and shared
3219 library. */
3220 sym->st_shndx = SHN_UNDEF;
3221 }
3222 }
3223
3224 if (h->got.offset != (bfd_vma) -1
3225 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3226 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3227 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3228 {
3229 Elf_Internal_Rela rela;
3230 bfd_byte *loc;
3231
3232 /* This symbol has an entry in the global offset table. Set it
3233 up. */
3234
3235 if (htab->sgot == NULL || htab->srelgot == NULL)
3236 abort ();
3237
3238 rela.r_offset = (htab->sgot->output_section->vma
3239 + htab->sgot->output_offset
3240 + (h->got.offset &~ (bfd_vma) 1));
3241
3242 /* If this is a static link, or it is a -Bsymbolic link and the
3243 symbol is defined locally or was forced to be local because
3244 of a version file, we just want to emit a RELATIVE reloc.
3245 The entry in the global offset table will already have been
3246 initialized in the relocate_section function. */
3247 if (info->shared
3248 && (info->symbolic
3249 || h->dynindx == -1
3250 || h->forced_local)
3251 && h->def_regular)
3252 {
3253 BFD_ASSERT((h->got.offset & 1) != 0);
3254 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3255 rela.r_addend = (h->root.u.def.value
3256 + h->root.u.def.section->output_section->vma
3257 + h->root.u.def.section->output_offset);
3258 }
3259 else
3260 {
3261 BFD_ASSERT((h->got.offset & 1) == 0);
3262 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3263 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3264 rela.r_addend = 0;
3265 }
3266
3267 loc = htab->srelgot->contents;
3268 loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3269 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3270 }
3271
3272 if (h->needs_copy)
3273 {
3274 Elf_Internal_Rela rela;
3275 bfd_byte *loc;
3276
3277 /* This symbols needs a copy reloc. Set it up. */
3278
3279 if (h->dynindx == -1
3280 || (h->root.type != bfd_link_hash_defined
3281 && h->root.type != bfd_link_hash_defweak)
3282 || htab->srelbss == NULL)
3283 abort ();
3284
3285 rela.r_offset = (h->root.u.def.value
3286 + h->root.u.def.section->output_section->vma
3287 + h->root.u.def.section->output_offset);
3288 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3289 rela.r_addend = 0;
3290 loc = htab->srelbss->contents;
3291 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3292 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3293 }
3294
3295 /* Mark some specially defined symbols as absolute. */
3296 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3297 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3298 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3299 sym->st_shndx = SHN_ABS;
3300
3301 return TRUE;
3302 }
3303
3304 /* Used to decide how to sort relocs in an optimal manner for the
3305 dynamic linker, before writing them out. */
3306
3307 static enum elf_reloc_type_class
3308 elf_s390_reloc_type_class (rela)
3309 const Elf_Internal_Rela *rela;
3310 {
3311 switch ((int) ELF32_R_TYPE (rela->r_info))
3312 {
3313 case R_390_RELATIVE:
3314 return reloc_class_relative;
3315 case R_390_JMP_SLOT:
3316 return reloc_class_plt;
3317 case R_390_COPY:
3318 return reloc_class_copy;
3319 default:
3320 return reloc_class_normal;
3321 }
3322 }
3323
3324 /* Finish up the dynamic sections. */
3325
3326 static bfd_boolean
3327 elf_s390_finish_dynamic_sections (output_bfd, info)
3328 bfd *output_bfd;
3329 struct bfd_link_info *info;
3330 {
3331 struct elf_s390_link_hash_table *htab;
3332 bfd *dynobj;
3333 asection *sdyn;
3334
3335 htab = elf_s390_hash_table (info);
3336 dynobj = htab->elf.dynobj;
3337 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3338
3339 if (htab->elf.dynamic_sections_created)
3340 {
3341 Elf32_External_Dyn *dyncon, *dynconend;
3342
3343 if (sdyn == NULL || htab->sgot == NULL)
3344 abort ();
3345
3346 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3347 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3348 for (; dyncon < dynconend; dyncon++)
3349 {
3350 Elf_Internal_Dyn dyn;
3351 asection *s;
3352
3353 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3354
3355 switch (dyn.d_tag)
3356 {
3357 default:
3358 continue;
3359
3360 case DT_PLTGOT:
3361 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3362 break;
3363
3364 case DT_JMPREL:
3365 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3366 break;
3367
3368 case DT_PLTRELSZ:
3369 s = htab->srelplt->output_section;
3370 dyn.d_un.d_val = s->size;
3371 break;
3372 }
3373
3374 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3375 }
3376
3377 /* Fill in the special first entry in the procedure linkage table. */
3378 if (htab->splt && htab->splt->size > 0)
3379 {
3380 memset (htab->splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3381 if (info->shared)
3382 {
3383 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD0,
3384 htab->splt->contents );
3385 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD1,
3386 htab->splt->contents +4 );
3387 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD2,
3388 htab->splt->contents +8 );
3389 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD3,
3390 htab->splt->contents +12 );
3391 bfd_put_32 (output_bfd, (bfd_vma) PLT_PIC_FIRST_ENTRY_WORD4,
3392 htab->splt->contents +16 );
3393 }
3394 else
3395 {
3396 bfd_put_32 (output_bfd, (bfd_vma)PLT_FIRST_ENTRY_WORD0,
3397 htab->splt->contents );
3398 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3399 htab->splt->contents +4 );
3400 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD2,
3401 htab->splt->contents +8 );
3402 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3403 htab->splt->contents +12 );
3404 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3405 htab->splt->contents +16 );
3406 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3407 htab->splt->contents +20 );
3408 bfd_put_32 (output_bfd,
3409 htab->sgotplt->output_section->vma
3410 + htab->sgotplt->output_offset,
3411 htab->splt->contents + 24);
3412 }
3413 elf_section_data (htab->splt->output_section)
3414 ->this_hdr.sh_entsize = 4;
3415 }
3416
3417 }
3418
3419 if (htab->sgotplt)
3420 {
3421 /* Fill in the first three entries in the global offset table. */
3422 if (htab->sgotplt->size > 0)
3423 {
3424 bfd_put_32 (output_bfd,
3425 (sdyn == NULL ? (bfd_vma) 0
3426 : sdyn->output_section->vma + sdyn->output_offset),
3427 htab->sgotplt->contents);
3428 /* One entry for shared object struct ptr. */
3429 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 4);
3430 /* One entry for _dl_runtime_resolve. */
3431 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3432 }
3433
3434 elf_section_data (htab->sgotplt->output_section)
3435 ->this_hdr.sh_entsize = 4;
3436 }
3437 return TRUE;
3438 }
3439
3440 static bfd_boolean
3441 elf_s390_grok_prstatus (abfd, note)
3442 bfd * abfd;
3443 Elf_Internal_Note * note;
3444 {
3445 int offset;
3446 unsigned int size;
3447
3448 switch (note->descsz)
3449 {
3450 default:
3451 return FALSE;
3452
3453 case 224: /* S/390 Linux. */
3454 /* pr_cursig */
3455 elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12);
3456
3457 /* pr_pid */
3458 elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24);
3459
3460 /* pr_reg */
3461 offset = 72;
3462 size = 144;
3463 break;
3464 }
3465
3466 /* Make a ".reg/999" section. */
3467 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3468 size, note->descpos + offset);
3469 }
3470
3471 /* Return address for Ith PLT stub in section PLT, for relocation REL
3472 or (bfd_vma) -1 if it should not be included. */
3473
3474 static bfd_vma
3475 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3476 const arelent *rel ATTRIBUTE_UNUSED)
3477 {
3478 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3479 }
3480
3481
3482 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3483 #define TARGET_BIG_NAME "elf32-s390"
3484 #define ELF_ARCH bfd_arch_s390
3485 #define ELF_MACHINE_CODE EM_S390
3486 #define ELF_MACHINE_ALT1 EM_S390_OLD
3487 #define ELF_MAXPAGESIZE 0x1000
3488
3489 #define elf_backend_can_gc_sections 1
3490 #define elf_backend_can_refcount 1
3491 #define elf_backend_want_got_plt 1
3492 #define elf_backend_plt_readonly 1
3493 #define elf_backend_want_plt_sym 0
3494 #define elf_backend_got_header_size 12
3495 #define elf_backend_rela_normal 1
3496
3497 #define elf_info_to_howto elf_s390_info_to_howto
3498
3499 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3500 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3501 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3502
3503 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3504 #define elf_backend_check_relocs elf_s390_check_relocs
3505 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3506 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3507 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3508 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3509 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3510 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3511 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3512 #define elf_backend_relocate_section elf_s390_relocate_section
3513 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3514 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3515 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3516 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3517
3518 #define bfd_elf32_mkobject elf_s390_mkobject
3519 #define elf_backend_object_p elf_s390_object_p
3520
3521 #include "elf32-target.h"
git-cvsimport of binutils cvsroot