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* elf32-m32c.c (m32c_offset_for_reloc): Fix local symbol
[binutils.git] / bfd / elf64-s390.c
blob7beda9dcd00bf7cc5767735c01a86cb99dce86ec
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006
3 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
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 ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 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 int elf_s390_tls_transition
81 PARAMS ((struct bfd_link_info *, int, int));
82 static bfd_reloc_status_type s390_tls_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
84 static bfd_vma dtpoff_base
85 PARAMS ((struct bfd_link_info *));
86 static bfd_vma tpoff
87 PARAMS ((struct bfd_link_info *, bfd_vma));
88 static void invalid_tls_insn
89 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
90 static bfd_reloc_status_type s390_elf_ldisp_reloc
91 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
92
93 #include "elf/s390.h"
94
95 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
96 from smaller values. Start with zero, widen, *then* decrement. */
97 #define MINUS_ONE (((bfd_vma)0) - 1)
98
99 /* The relocation "howto" table. */
100 static reloc_howto_type elf_howto_table[] =
101 {
102 HOWTO (R_390_NONE, /* type */
103 0, /* rightshift */
104 0, /* size (0 = byte, 1 = short, 2 = long) */
105 0, /* bitsize */
106 FALSE, /* pc_relative */
107 0, /* bitpos */
108 complain_overflow_dont, /* complain_on_overflow */
109 bfd_elf_generic_reloc, /* special_function */
110 "R_390_NONE", /* name */
111 FALSE, /* partial_inplace */
112 0, /* src_mask */
113 0, /* dst_mask */
114 FALSE), /* pcrel_offset */
115
116 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
118 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
119 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
120 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
122 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
124 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
126 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
128 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
130 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
132 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
134 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
136 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
138 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
140 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
142 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
144 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
146 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
148 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
150 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
152 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
154 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
156 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
158 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
160 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
162 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
164 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
165 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
166 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
168 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
170 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
172 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
173 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
174 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
178 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
180 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
181 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
182 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
183 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
184 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
185 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
186 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
187 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
188 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
189 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
190 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
191 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
192 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
193 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
194 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
195 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
197 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
198 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
199 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
200 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
202 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
203 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
205 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
206 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
208 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
210 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
211 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
212 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
213 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
214 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
215 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
216 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
217 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
218 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
219 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
220 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
221 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
222 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
223 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
224 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
225 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
226 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
227 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
228 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
229 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
230 };
231
232 /* GNU extension to record C++ vtable hierarchy. */
233 static reloc_howto_type elf64_s390_vtinherit_howto =
234 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
235 static reloc_howto_type elf64_s390_vtentry_howto =
236 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
237
238 static reloc_howto_type *
239 elf_s390_reloc_type_lookup (abfd, code)
240 bfd *abfd ATTRIBUTE_UNUSED;
241 bfd_reloc_code_real_type code;
242 {
243 switch (code)
244 {
245 case BFD_RELOC_NONE:
246 return &elf_howto_table[(int) R_390_NONE];
247 case BFD_RELOC_8:
248 return &elf_howto_table[(int) R_390_8];
249 case BFD_RELOC_390_12:
250 return &elf_howto_table[(int) R_390_12];
251 case BFD_RELOC_16:
252 return &elf_howto_table[(int) R_390_16];
253 case BFD_RELOC_32:
254 return &elf_howto_table[(int) R_390_32];
255 case BFD_RELOC_CTOR:
256 return &elf_howto_table[(int) R_390_32];
257 case BFD_RELOC_32_PCREL:
258 return &elf_howto_table[(int) R_390_PC32];
259 case BFD_RELOC_390_GOT12:
260 return &elf_howto_table[(int) R_390_GOT12];
261 case BFD_RELOC_32_GOT_PCREL:
262 return &elf_howto_table[(int) R_390_GOT32];
263 case BFD_RELOC_390_PLT32:
264 return &elf_howto_table[(int) R_390_PLT32];
265 case BFD_RELOC_390_COPY:
266 return &elf_howto_table[(int) R_390_COPY];
267 case BFD_RELOC_390_GLOB_DAT:
268 return &elf_howto_table[(int) R_390_GLOB_DAT];
269 case BFD_RELOC_390_JMP_SLOT:
270 return &elf_howto_table[(int) R_390_JMP_SLOT];
271 case BFD_RELOC_390_RELATIVE:
272 return &elf_howto_table[(int) R_390_RELATIVE];
273 case BFD_RELOC_32_GOTOFF:
274 return &elf_howto_table[(int) R_390_GOTOFF32];
275 case BFD_RELOC_390_GOTPC:
276 return &elf_howto_table[(int) R_390_GOTPC];
277 case BFD_RELOC_390_GOT16:
278 return &elf_howto_table[(int) R_390_GOT16];
279 case BFD_RELOC_16_PCREL:
280 return &elf_howto_table[(int) R_390_PC16];
281 case BFD_RELOC_390_PC16DBL:
282 return &elf_howto_table[(int) R_390_PC16DBL];
283 case BFD_RELOC_390_PLT16DBL:
284 return &elf_howto_table[(int) R_390_PLT16DBL];
285 case BFD_RELOC_390_PC32DBL:
286 return &elf_howto_table[(int) R_390_PC32DBL];
287 case BFD_RELOC_390_PLT32DBL:
288 return &elf_howto_table[(int) R_390_PLT32DBL];
289 case BFD_RELOC_390_GOTPCDBL:
290 return &elf_howto_table[(int) R_390_GOTPCDBL];
291 case BFD_RELOC_64:
292 return &elf_howto_table[(int) R_390_64];
293 case BFD_RELOC_64_PCREL:
294 return &elf_howto_table[(int) R_390_PC64];
295 case BFD_RELOC_390_GOT64:
296 return &elf_howto_table[(int) R_390_GOT64];
297 case BFD_RELOC_390_PLT64:
298 return &elf_howto_table[(int) R_390_PLT64];
299 case BFD_RELOC_390_GOTENT:
300 return &elf_howto_table[(int) R_390_GOTENT];
301 case BFD_RELOC_16_GOTOFF:
302 return &elf_howto_table[(int) R_390_GOTOFF16];
303 case BFD_RELOC_390_GOTOFF64:
304 return &elf_howto_table[(int) R_390_GOTOFF64];
305 case BFD_RELOC_390_GOTPLT12:
306 return &elf_howto_table[(int) R_390_GOTPLT12];
307 case BFD_RELOC_390_GOTPLT16:
308 return &elf_howto_table[(int) R_390_GOTPLT16];
309 case BFD_RELOC_390_GOTPLT32:
310 return &elf_howto_table[(int) R_390_GOTPLT32];
311 case BFD_RELOC_390_GOTPLT64:
312 return &elf_howto_table[(int) R_390_GOTPLT64];
313 case BFD_RELOC_390_GOTPLTENT:
314 return &elf_howto_table[(int) R_390_GOTPLTENT];
315 case BFD_RELOC_390_PLTOFF16:
316 return &elf_howto_table[(int) R_390_PLTOFF16];
317 case BFD_RELOC_390_PLTOFF32:
318 return &elf_howto_table[(int) R_390_PLTOFF32];
319 case BFD_RELOC_390_PLTOFF64:
320 return &elf_howto_table[(int) R_390_PLTOFF64];
321 case BFD_RELOC_390_TLS_LOAD:
322 return &elf_howto_table[(int) R_390_TLS_LOAD];
323 case BFD_RELOC_390_TLS_GDCALL:
324 return &elf_howto_table[(int) R_390_TLS_GDCALL];
325 case BFD_RELOC_390_TLS_LDCALL:
326 return &elf_howto_table[(int) R_390_TLS_LDCALL];
327 case BFD_RELOC_390_TLS_GD64:
328 return &elf_howto_table[(int) R_390_TLS_GD64];
329 case BFD_RELOC_390_TLS_GOTIE12:
330 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
331 case BFD_RELOC_390_TLS_GOTIE64:
332 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
333 case BFD_RELOC_390_TLS_LDM64:
334 return &elf_howto_table[(int) R_390_TLS_LDM64];
335 case BFD_RELOC_390_TLS_IE64:
336 return &elf_howto_table[(int) R_390_TLS_IE64];
337 case BFD_RELOC_390_TLS_IEENT:
338 return &elf_howto_table[(int) R_390_TLS_IEENT];
339 case BFD_RELOC_390_TLS_LE64:
340 return &elf_howto_table[(int) R_390_TLS_LE64];
341 case BFD_RELOC_390_TLS_LDO64:
342 return &elf_howto_table[(int) R_390_TLS_LDO64];
343 case BFD_RELOC_390_TLS_DTPMOD:
344 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
345 case BFD_RELOC_390_TLS_DTPOFF:
346 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
347 case BFD_RELOC_390_TLS_TPOFF:
348 return &elf_howto_table[(int) R_390_TLS_TPOFF];
349 case BFD_RELOC_390_20:
350 return &elf_howto_table[(int) R_390_20];
351 case BFD_RELOC_390_GOT20:
352 return &elf_howto_table[(int) R_390_GOT20];
353 case BFD_RELOC_390_GOTPLT20:
354 return &elf_howto_table[(int) R_390_GOTPLT20];
355 case BFD_RELOC_390_TLS_GOTIE20:
356 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
357 case BFD_RELOC_VTABLE_INHERIT:
358 return &elf64_s390_vtinherit_howto;
359 case BFD_RELOC_VTABLE_ENTRY:
360 return &elf64_s390_vtentry_howto;
361 default:
362 break;
363 }
364 return 0;
365 }
366
367 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
368 and elf64-s390.c has its own copy. */
369
370 static void
371 elf_s390_info_to_howto (abfd, cache_ptr, dst)
372 bfd *abfd ATTRIBUTE_UNUSED;
373 arelent *cache_ptr;
374 Elf_Internal_Rela *dst;
375 {
376 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
377 switch (r_type)
378 {
379 case R_390_GNU_VTINHERIT:
380 cache_ptr->howto = &elf64_s390_vtinherit_howto;
381 break;
382
383 case R_390_GNU_VTENTRY:
384 cache_ptr->howto = &elf64_s390_vtentry_howto;
385 break;
386
387 default:
388 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
389 {
390 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
391 abfd, (int) r_type);
392 r_type = R_390_NONE;
393 }
394 cache_ptr->howto = &elf_howto_table[r_type];
395 }
396 }
397
398 /* A relocation function which doesn't do anything. */
399 static bfd_reloc_status_type
400 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
401 output_bfd, error_message)
402 bfd *abfd ATTRIBUTE_UNUSED;
403 arelent *reloc_entry;
404 asymbol *symbol ATTRIBUTE_UNUSED;
405 PTR data ATTRIBUTE_UNUSED;
406 asection *input_section;
407 bfd *output_bfd;
408 char **error_message ATTRIBUTE_UNUSED;
409 {
410 if (output_bfd)
411 reloc_entry->address += input_section->output_offset;
412 return bfd_reloc_ok;
413 }
414
415 /* Handle the large displacement relocs. */
416 static bfd_reloc_status_type
417 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
418 output_bfd, error_message)
419 bfd *abfd;
420 arelent *reloc_entry;
421 asymbol *symbol;
422 PTR data;
423 asection *input_section;
424 bfd *output_bfd;
425 char **error_message ATTRIBUTE_UNUSED;
426 {
427 reloc_howto_type *howto = reloc_entry->howto;
428 bfd_vma relocation;
429 bfd_vma insn;
430
431 if (output_bfd != (bfd *) NULL
432 && (symbol->flags & BSF_SECTION_SYM) == 0
433 && (! howto->partial_inplace
434 || reloc_entry->addend == 0))
435 {
436 reloc_entry->address += input_section->output_offset;
437 return bfd_reloc_ok;
438 }
439 if (output_bfd != NULL)
440 return bfd_reloc_continue;
441
442 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
443 return bfd_reloc_outofrange;
444
445 relocation = (symbol->value
446 + symbol->section->output_section->vma
447 + symbol->section->output_offset);
448 relocation += reloc_entry->addend;
449 if (howto->pc_relative)
450 {
451 relocation -= (input_section->output_section->vma
452 + input_section->output_offset);
453 relocation -= reloc_entry->address;
454 }
455
456 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
457 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
458 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
459
460 if ((bfd_signed_vma) relocation < - 0x80000
461 || (bfd_signed_vma) relocation > 0x7ffff)
462 return bfd_reloc_overflow;
463 else
464 return bfd_reloc_ok;
465 }
466
467 static bfd_boolean
468 elf_s390_is_local_label_name (abfd, name)
469 bfd *abfd;
470 const char *name;
471 {
472 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
473 return TRUE;
474
475 return _bfd_elf_is_local_label_name (abfd, name);
476 }
477
478 /* Functions for the 390 ELF linker. */
479
480 /* The name of the dynamic interpreter. This is put in the .interp
481 section. */
482
483 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
484
485 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
486 copying dynamic variables from a shared lib into an app's dynbss
487 section, and instead use a dynamic relocation to point into the
488 shared lib. */
489 #define ELIMINATE_COPY_RELOCS 1
490
491 /* The size in bytes of the first entry in the procedure linkage table. */
492 #define PLT_FIRST_ENTRY_SIZE 32
493 /* The size in bytes of an entry in the procedure linkage table. */
494 #define PLT_ENTRY_SIZE 32
495
496 #define GOT_ENTRY_SIZE 8
497
498 /* The first three entries in a procedure linkage table are reserved,
499 and the initial contents are unimportant (we zero them out).
500 Subsequent entries look like this. See the SVR4 ABI 386
501 supplement to see how this works. */
502
503 /* For the s390, simple addr offset can only be 0 - 4096.
504 To use the full 16777216 TB address space, several instructions
505 are needed to load an address in a register and execute
506 a branch( or just saving the address)
507
508 Furthermore, only r 0 and 1 are free to use!!! */
509
510 /* The first 3 words in the GOT are then reserved.
511 Word 0 is the address of the dynamic table.
512 Word 1 is a pointer to a structure describing the object
513 Word 2 is used to point to the loader entry address.
514
515 The code for PLT entries looks like this:
516
517 The GOT holds the address in the PLT to be executed.
518 The loader then gets:
519 24(15) = Pointer to the structure describing the object.
520 28(15) = Offset in symbol table
521 The loader must then find the module where the function is
522 and insert the address in the GOT.
523
524 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
525 LG 1,0(1) # 6 bytes Load address from GOT in r1
526 BCR 15,1 # 2 bytes Jump to address
527 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
528 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
529 BRCL 15,-x # 6 bytes Jump to start of PLT
530 .long ? # 4 bytes offset into symbol table
531
532 Total = 32 bytes per PLT entry
533 Fixup at offset 2: relative address to GOT entry
534 Fixup at offset 22: relative branch to PLT0
535 Fixup at offset 28: 32 bit offset into symbol table
536
537 A 32 bit offset into the symbol table is enough. It allows for symbol
538 tables up to a size of 2 gigabyte. A single dynamic object (the main
539 program, any shared library) is limited to 4GB in size and I want to see
540 the program that manages to have a symbol table of more than 2 GB with a
541 total size of at max 4 GB. */
542
543 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
544 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
545 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
546 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
547 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
548 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
549 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
550 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
551
552 /* The first PLT entry pushes the offset into the symbol table
553 from R1 onto the stack at 8(15) and the loader object info
554 at 12(15), loads the loader address in R1 and jumps to it. */
555
556 /* The first entry in the PLT:
557
558 PLT0:
559 STG 1,56(15) # r1 contains the offset into the symbol table
560 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
561 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
562 LG 1,16(1) # get entry address of loader
563 BCR 15,1 # jump to loader
564
565 Fixup at offset 8: relative address to start of GOT. */
566
567 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
568 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
569 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
570 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
571 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
572 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
573 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
574 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
575
576 /* The s390 linker needs to keep track of the number of relocs that it
577 decides to copy as dynamic relocs in check_relocs for each symbol.
578 This is so that it can later discard them if they are found to be
579 unnecessary. We store the information in a field extending the
580 regular ELF linker hash table. */
581
582 struct elf_s390_dyn_relocs
583 {
584 struct elf_s390_dyn_relocs *next;
585
586 /* The input section of the reloc. */
587 asection *sec;
588
589 /* Total number of relocs copied for the input section. */
590 bfd_size_type count;
591
592 /* Number of pc-relative relocs copied for the input section. */
593 bfd_size_type pc_count;
594 };
595
596 /* s390 ELF linker hash entry. */
597
598 struct elf_s390_link_hash_entry
599 {
600 struct elf_link_hash_entry elf;
601
602 /* Track dynamic relocs copied for this symbol. */
603 struct elf_s390_dyn_relocs *dyn_relocs;
604
605 /* Number of GOTPLT references for a function. */
606 bfd_signed_vma gotplt_refcount;
607
608 #define GOT_UNKNOWN 0
609 #define GOT_NORMAL 1
610 #define GOT_TLS_GD 2
611 #define GOT_TLS_IE 3
612 #define GOT_TLS_IE_NLT 3
613 unsigned char tls_type;
614 };
615
616 #define elf_s390_hash_entry(ent) \
617 ((struct elf_s390_link_hash_entry *)(ent))
618
619 struct elf_s390_obj_tdata
620 {
621 struct elf_obj_tdata root;
622
623 /* tls_type for each local got entry. */
624 char *local_got_tls_type;
625 };
626
627 #define elf_s390_tdata(abfd) \
628 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
629
630 #define elf_s390_local_got_tls_type(abfd) \
631 (elf_s390_tdata (abfd)->local_got_tls_type)
632
633 static bfd_boolean
634 elf_s390_mkobject (abfd)
635 bfd *abfd;
636 {
637 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
638 abfd->tdata.any = bfd_zalloc (abfd, amt);
639 if (abfd->tdata.any == NULL)
640 return FALSE;
641 return TRUE;
642 }
643
644 static bfd_boolean
645 elf_s390_object_p (abfd)
646 bfd *abfd;
647 {
648 /* Set the right machine number for an s390 elf32 file. */
649 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
650 }
651
652 /* s390 ELF linker hash table. */
653
654 struct elf_s390_link_hash_table
655 {
656 struct elf_link_hash_table elf;
657
658 /* Short-cuts to get to dynamic linker sections. */
659 asection *sgot;
660 asection *sgotplt;
661 asection *srelgot;
662 asection *splt;
663 asection *srelplt;
664 asection *sdynbss;
665 asection *srelbss;
666
667 union {
668 bfd_signed_vma refcount;
669 bfd_vma offset;
670 } tls_ldm_got;
671
672 /* Small local sym to section mapping cache. */
673 struct sym_sec_cache sym_sec;
674 };
675
676 /* Get the s390 ELF linker hash table from a link_info structure. */
677
678 #define elf_s390_hash_table(p) \
679 ((struct elf_s390_link_hash_table *) ((p)->hash))
680
681 /* Create an entry in an s390 ELF linker hash table. */
682
683 static struct bfd_hash_entry *
684 link_hash_newfunc (entry, table, string)
685 struct bfd_hash_entry *entry;
686 struct bfd_hash_table *table;
687 const char *string;
688 {
689 /* Allocate the structure if it has not already been allocated by a
690 subclass. */
691 if (entry == NULL)
692 {
693 entry = bfd_hash_allocate (table,
694 sizeof (struct elf_s390_link_hash_entry));
695 if (entry == NULL)
696 return entry;
697 }
698
699 /* Call the allocation method of the superclass. */
700 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
701 if (entry != NULL)
702 {
703 struct elf_s390_link_hash_entry *eh;
704
705 eh = (struct elf_s390_link_hash_entry *) entry;
706 eh->dyn_relocs = NULL;
707 eh->gotplt_refcount = 0;
708 eh->tls_type = GOT_UNKNOWN;
709 }
710
711 return entry;
712 }
713
714 /* Create an s390 ELF linker hash table. */
715
716 static struct bfd_link_hash_table *
717 elf_s390_link_hash_table_create (abfd)
718 bfd *abfd;
719 {
720 struct elf_s390_link_hash_table *ret;
721 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
722
723 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
724 if (ret == NULL)
725 return NULL;
726
727 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
728 {
729 free (ret);
730 return NULL;
731 }
732
733 ret->sgot = NULL;
734 ret->sgotplt = NULL;
735 ret->srelgot = NULL;
736 ret->splt = NULL;
737 ret->srelplt = NULL;
738 ret->sdynbss = NULL;
739 ret->srelbss = NULL;
740 ret->tls_ldm_got.refcount = 0;
741 ret->sym_sec.abfd = NULL;
742
743 return &ret->elf.root;
744 }
745
746 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
747 shortcuts to them in our hash table. */
748
749 static bfd_boolean
750 create_got_section (dynobj, info)
751 bfd *dynobj;
752 struct bfd_link_info *info;
753 {
754 struct elf_s390_link_hash_table *htab;
755
756 if (! _bfd_elf_create_got_section (dynobj, info))
757 return FALSE;
758
759 htab = elf_s390_hash_table (info);
760 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
761 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
762 if (!htab->sgot || !htab->sgotplt)
763 abort ();
764
765 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
766 (SEC_ALLOC | SEC_LOAD
767 | SEC_HAS_CONTENTS
768 | SEC_IN_MEMORY
769 | SEC_LINKER_CREATED
770 | SEC_READONLY));
771 if (htab->srelgot == NULL
772 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
773 return FALSE;
774 return TRUE;
775 }
776
777 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
778 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
779 hash table. */
780
781 static bfd_boolean
782 elf_s390_create_dynamic_sections (dynobj, info)
783 bfd *dynobj;
784 struct bfd_link_info *info;
785 {
786 struct elf_s390_link_hash_table *htab;
787
788 htab = elf_s390_hash_table (info);
789 if (!htab->sgot && !create_got_section (dynobj, info))
790 return FALSE;
791
792 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
793 return FALSE;
794
795 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
796 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
797 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
798 if (!info->shared)
799 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
800
801 if (!htab->splt || !htab->srelplt || !htab->sdynbss
802 || (!info->shared && !htab->srelbss))
803 abort ();
804
805 return TRUE;
806 }
807
808 /* Copy the extra info we tack onto an elf_link_hash_entry. */
809
810 static void
811 elf_s390_copy_indirect_symbol (info, dir, ind)
812 struct bfd_link_info *info;
813 struct elf_link_hash_entry *dir, *ind;
814 {
815 struct elf_s390_link_hash_entry *edir, *eind;
816
817 edir = (struct elf_s390_link_hash_entry *) dir;
818 eind = (struct elf_s390_link_hash_entry *) ind;
819
820 if (eind->dyn_relocs != NULL)
821 {
822 if (edir->dyn_relocs != NULL)
823 {
824 struct elf_s390_dyn_relocs **pp;
825 struct elf_s390_dyn_relocs *p;
826
827 /* Add reloc counts against the indirect sym to the direct sym
828 list. Merge any entries against the same section. */
829 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
830 {
831 struct elf_s390_dyn_relocs *q;
832
833 for (q = edir->dyn_relocs; q != NULL; q = q->next)
834 if (q->sec == p->sec)
835 {
836 q->pc_count += p->pc_count;
837 q->count += p->count;
838 *pp = p->next;
839 break;
840 }
841 if (q == NULL)
842 pp = &p->next;
843 }
844 *pp = edir->dyn_relocs;
845 }
846
847 edir->dyn_relocs = eind->dyn_relocs;
848 eind->dyn_relocs = NULL;
849 }
850
851 if (ind->root.type == bfd_link_hash_indirect
852 && dir->got.refcount <= 0)
853 {
854 edir->tls_type = eind->tls_type;
855 eind->tls_type = GOT_UNKNOWN;
856 }
857
858 if (ELIMINATE_COPY_RELOCS
859 && ind->root.type != bfd_link_hash_indirect
860 && dir->dynamic_adjusted)
861 {
862 /* If called to transfer flags for a weakdef during processing
863 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
864 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
865 dir->ref_dynamic |= ind->ref_dynamic;
866 dir->ref_regular |= ind->ref_regular;
867 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
868 dir->needs_plt |= ind->needs_plt;
869 }
870 else
871 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
872 }
873
874 static int
875 elf_s390_tls_transition (info, r_type, is_local)
876 struct bfd_link_info *info;
877 int r_type;
878 int is_local;
879 {
880 if (info->shared)
881 return r_type;
882
883 switch (r_type)
884 {
885 case R_390_TLS_GD64:
886 case R_390_TLS_IE64:
887 if (is_local)
888 return R_390_TLS_LE64;
889 return R_390_TLS_IE64;
890 case R_390_TLS_GOTIE64:
891 if (is_local)
892 return R_390_TLS_LE64;
893 return R_390_TLS_GOTIE64;
894 case R_390_TLS_LDM64:
895 return R_390_TLS_LE64;
896 }
897
898 return r_type;
899 }
900
901 /* Look through the relocs for a section during the first phase, and
902 allocate space in the global offset table or procedure linkage
903 table. */
904
905 static bfd_boolean
906 elf_s390_check_relocs (abfd, info, sec, relocs)
907 bfd *abfd;
908 struct bfd_link_info *info;
909 asection *sec;
910 const Elf_Internal_Rela *relocs;
911 {
912 struct elf_s390_link_hash_table *htab;
913 Elf_Internal_Shdr *symtab_hdr;
914 struct elf_link_hash_entry **sym_hashes;
915 const Elf_Internal_Rela *rel;
916 const Elf_Internal_Rela *rel_end;
917 asection *sreloc;
918 bfd_signed_vma *local_got_refcounts;
919 int tls_type, old_tls_type;
920
921 if (info->relocatable)
922 return TRUE;
923
924 htab = elf_s390_hash_table (info);
925 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
926 sym_hashes = elf_sym_hashes (abfd);
927 local_got_refcounts = elf_local_got_refcounts (abfd);
928
929 sreloc = NULL;
930
931 rel_end = relocs + sec->reloc_count;
932 for (rel = relocs; rel < rel_end; rel++)
933 {
934 unsigned int r_type;
935 unsigned long r_symndx;
936 struct elf_link_hash_entry *h;
937
938 r_symndx = ELF64_R_SYM (rel->r_info);
939
940 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
941 {
942 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
943 abfd,
944 r_symndx);
945 return FALSE;
946 }
947
948 if (r_symndx < symtab_hdr->sh_info)
949 h = NULL;
950 else
951 {
952 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
953 while (h->root.type == bfd_link_hash_indirect
954 || h->root.type == bfd_link_hash_warning)
955 h = (struct elf_link_hash_entry *) h->root.u.i.link;
956 }
957
958 /* Create got section and local_got_refcounts array if they
959 are needed. */
960 r_type = elf_s390_tls_transition (info,
961 ELF64_R_TYPE (rel->r_info),
962 h == NULL);
963 switch (r_type)
964 {
965 case R_390_GOT12:
966 case R_390_GOT16:
967 case R_390_GOT20:
968 case R_390_GOT32:
969 case R_390_GOT64:
970 case R_390_GOTENT:
971 case R_390_GOTPLT12:
972 case R_390_GOTPLT16:
973 case R_390_GOTPLT20:
974 case R_390_GOTPLT32:
975 case R_390_GOTPLT64:
976 case R_390_GOTPLTENT:
977 case R_390_TLS_GD64:
978 case R_390_TLS_GOTIE12:
979 case R_390_TLS_GOTIE20:
980 case R_390_TLS_GOTIE64:
981 case R_390_TLS_IEENT:
982 case R_390_TLS_IE64:
983 case R_390_TLS_LDM64:
984 if (h == NULL
985 && local_got_refcounts == NULL)
986 {
987 bfd_size_type size;
988
989 size = symtab_hdr->sh_info;
990 size *= (sizeof (bfd_signed_vma) + sizeof(char));
991 local_got_refcounts = ((bfd_signed_vma *)
992 bfd_zalloc (abfd, size));
993 if (local_got_refcounts == NULL)
994 return FALSE;
995 elf_local_got_refcounts (abfd) = local_got_refcounts;
996 elf_s390_local_got_tls_type (abfd)
997 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
998 }
999 /* Fall through. */
1000 case R_390_GOTOFF16:
1001 case R_390_GOTOFF32:
1002 case R_390_GOTOFF64:
1003 case R_390_GOTPC:
1004 case R_390_GOTPCDBL:
1005 if (htab->sgot == NULL)
1006 {
1007 if (htab->elf.dynobj == NULL)
1008 htab->elf.dynobj = abfd;
1009 if (!create_got_section (htab->elf.dynobj, info))
1010 return FALSE;
1011 }
1012 }
1013
1014 switch (r_type)
1015 {
1016 case R_390_GOTOFF16:
1017 case R_390_GOTOFF32:
1018 case R_390_GOTOFF64:
1019 case R_390_GOTPC:
1020 case R_390_GOTPCDBL:
1021 /* Got is created, nothing to be done. */
1022 break;
1023
1024 case R_390_PLT16DBL:
1025 case R_390_PLT32:
1026 case R_390_PLT32DBL:
1027 case R_390_PLT64:
1028 case R_390_PLTOFF16:
1029 case R_390_PLTOFF32:
1030 case R_390_PLTOFF64:
1031 /* This symbol requires a procedure linkage table entry. We
1032 actually build the entry in adjust_dynamic_symbol,
1033 because this might be a case of linking PIC code which is
1034 never referenced by a dynamic object, in which case we
1035 don't need to generate a procedure linkage table entry
1036 after all. */
1037
1038 /* If this is a local symbol, we resolve it directly without
1039 creating a procedure linkage table entry. */
1040 if (h != NULL)
1041 {
1042 h->needs_plt = 1;
1043 h->plt.refcount += 1;
1044 }
1045 break;
1046
1047 case R_390_GOTPLT12:
1048 case R_390_GOTPLT16:
1049 case R_390_GOTPLT20:
1050 case R_390_GOTPLT32:
1051 case R_390_GOTPLT64:
1052 case R_390_GOTPLTENT:
1053 /* This symbol requires either a procedure linkage table entry
1054 or an entry in the local got. We actually build the entry
1055 in adjust_dynamic_symbol because whether this is really a
1056 global reference can change and with it the fact if we have
1057 to create a plt entry or a local got entry. To be able to
1058 make a once global symbol a local one we have to keep track
1059 of the number of gotplt references that exist for this
1060 symbol. */
1061 if (h != NULL)
1062 {
1063 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1064 h->needs_plt = 1;
1065 h->plt.refcount += 1;
1066 }
1067 else
1068 local_got_refcounts[r_symndx] += 1;
1069 break;
1070
1071 case R_390_TLS_LDM64:
1072 htab->tls_ldm_got.refcount += 1;
1073 break;
1074
1075 case R_390_TLS_IE64:
1076 case R_390_TLS_GOTIE12:
1077 case R_390_TLS_GOTIE20:
1078 case R_390_TLS_GOTIE64:
1079 case R_390_TLS_IEENT:
1080 if (info->shared)
1081 info->flags |= DF_STATIC_TLS;
1082 /* Fall through */
1083
1084 case R_390_GOT12:
1085 case R_390_GOT16:
1086 case R_390_GOT20:
1087 case R_390_GOT32:
1088 case R_390_GOT64:
1089 case R_390_GOTENT:
1090 case R_390_TLS_GD64:
1091 /* This symbol requires a global offset table entry. */
1092 switch (r_type)
1093 {
1094 default:
1095 case R_390_GOT12:
1096 case R_390_GOT16:
1097 case R_390_GOT20:
1098 case R_390_GOT32:
1099 case R_390_GOTENT:
1100 tls_type = GOT_NORMAL;
1101 break;
1102 case R_390_TLS_GD64:
1103 tls_type = GOT_TLS_GD;
1104 break;
1105 case R_390_TLS_IE64:
1106 case R_390_TLS_GOTIE64:
1107 tls_type = GOT_TLS_IE;
1108 break;
1109 case R_390_TLS_GOTIE12:
1110 case R_390_TLS_GOTIE20:
1111 case R_390_TLS_IEENT:
1112 tls_type = GOT_TLS_IE_NLT;
1113 break;
1114 }
1115
1116 if (h != NULL)
1117 {
1118 h->got.refcount += 1;
1119 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1120 }
1121 else
1122 {
1123 local_got_refcounts[r_symndx] += 1;
1124 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1125 }
1126 /* If a TLS symbol is accessed using IE at least once,
1127 there is no point to use dynamic model for it. */
1128 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1129 {
1130 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1131 {
1132 (*_bfd_error_handler)
1133 (_("%B: `%s' accessed both as normal and thread local symbol"),
1134 abfd, h->root.root.string);
1135 return FALSE;
1136 }
1137 if (old_tls_type > tls_type)
1138 tls_type = old_tls_type;
1139 }
1140
1141 if (old_tls_type != tls_type)
1142 {
1143 if (h != NULL)
1144 elf_s390_hash_entry (h)->tls_type = tls_type;
1145 else
1146 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1147 }
1148
1149 if (r_type != R_390_TLS_IE64)
1150 break;
1151 /* Fall through */
1152
1153 case R_390_TLS_LE64:
1154 if (!info->shared)
1155 break;
1156 info->flags |= DF_STATIC_TLS;
1157 /* Fall through */
1158
1159 case R_390_8:
1160 case R_390_16:
1161 case R_390_32:
1162 case R_390_64:
1163 case R_390_PC16:
1164 case R_390_PC16DBL:
1165 case R_390_PC32:
1166 case R_390_PC32DBL:
1167 case R_390_PC64:
1168 if (h != NULL && !info->shared)
1169 {
1170 /* If this reloc is in a read-only section, we might
1171 need a copy reloc. We can't check reliably at this
1172 stage whether the section is read-only, as input
1173 sections have not yet been mapped to output sections.
1174 Tentatively set the flag for now, and correct in
1175 adjust_dynamic_symbol. */
1176 h->non_got_ref = 1;
1177
1178 /* We may need a .plt entry if the function this reloc
1179 refers to is in a shared lib. */
1180 h->plt.refcount += 1;
1181 }
1182
1183 /* If we are creating a shared library, and this is a reloc
1184 against a global symbol, or a non PC relative reloc
1185 against a local symbol, then we need to copy the reloc
1186 into the shared library. However, if we are linking with
1187 -Bsymbolic, we do not need to copy a reloc against a
1188 global symbol which is defined in an object we are
1189 including in the link (i.e., DEF_REGULAR is set). At
1190 this point we have not seen all the input files, so it is
1191 possible that DEF_REGULAR is not set now but will be set
1192 later (it is never cleared). In case of a weak definition,
1193 DEF_REGULAR may be cleared later by a strong definition in
1194 a shared library. We account for that possibility below by
1195 storing information in the relocs_copied field of the hash
1196 table entry. A similar situation occurs when creating
1197 shared libraries and symbol visibility changes render the
1198 symbol local.
1199
1200 If on the other hand, we are creating an executable, we
1201 may need to keep relocations for symbols satisfied by a
1202 dynamic library if we manage to avoid copy relocs for the
1203 symbol. */
1204 if ((info->shared
1205 && (sec->flags & SEC_ALLOC) != 0
1206 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1208 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1209 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1210 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1211 || (h != NULL
1212 && (! info->symbolic
1213 || h->root.type == bfd_link_hash_defweak
1214 || !h->def_regular))))
1215 || (ELIMINATE_COPY_RELOCS
1216 && !info->shared
1217 && (sec->flags & SEC_ALLOC) != 0
1218 && h != NULL
1219 && (h->root.type == bfd_link_hash_defweak
1220 || !h->def_regular)))
1221 {
1222 struct elf_s390_dyn_relocs *p;
1223 struct elf_s390_dyn_relocs **head;
1224
1225 /* We must copy these reloc types into the output file.
1226 Create a reloc section in dynobj and make room for
1227 this reloc. */
1228 if (sreloc == NULL)
1229 {
1230 const char *name;
1231 bfd *dynobj;
1232
1233 name = (bfd_elf_string_from_elf_section
1234 (abfd,
1235 elf_elfheader (abfd)->e_shstrndx,
1236 elf_section_data (sec)->rel_hdr.sh_name));
1237 if (name == NULL)
1238 return FALSE;
1239
1240 if (strncmp (name, ".rela", 5) != 0
1241 || strcmp (bfd_get_section_name (abfd, sec),
1242 name + 5) != 0)
1243 {
1244 (*_bfd_error_handler)
1245 (_("%B: bad relocation section name `%s\'"),
1246 abfd, name);
1247 }
1248
1249 if (htab->elf.dynobj == NULL)
1250 htab->elf.dynobj = abfd;
1251
1252 dynobj = htab->elf.dynobj;
1253 sreloc = bfd_get_section_by_name (dynobj, name);
1254 if (sreloc == NULL)
1255 {
1256 flagword flags;
1257
1258 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1259 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1260 if ((sec->flags & SEC_ALLOC) != 0)
1261 flags |= SEC_ALLOC | SEC_LOAD;
1262 sreloc = bfd_make_section_with_flags (dynobj,
1263 name,
1264 flags);
1265 if (sreloc == NULL
1266 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1267 return FALSE;
1268 }
1269 elf_section_data (sec)->sreloc = sreloc;
1270 }
1271
1272 /* If this is a global symbol, we count the number of
1273 relocations we need for this symbol. */
1274 if (h != NULL)
1275 {
1276 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1277 }
1278 else
1279 {
1280 /* Track dynamic relocs needed for local syms too.
1281 We really need local syms available to do this
1282 easily. Oh well. */
1283
1284 asection *s;
1285 void *vpp;
1286
1287 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1288 sec, r_symndx);
1289 if (s == NULL)
1290 return FALSE;
1291
1292 vpp = &elf_section_data (s)->local_dynrel;
1293 head = (struct elf_s390_dyn_relocs **) vpp;
1294 }
1295
1296 p = *head;
1297 if (p == NULL || p->sec != sec)
1298 {
1299 bfd_size_type amt = sizeof *p;
1300 p = ((struct elf_s390_dyn_relocs *)
1301 bfd_alloc (htab->elf.dynobj, amt));
1302 if (p == NULL)
1303 return FALSE;
1304 p->next = *head;
1305 *head = p;
1306 p->sec = sec;
1307 p->count = 0;
1308 p->pc_count = 0;
1309 }
1310
1311 p->count += 1;
1312 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1313 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1314 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1315 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1316 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1317 p->pc_count += 1;
1318 }
1319 break;
1320
1321 /* This relocation describes the C++ object vtable hierarchy.
1322 Reconstruct it for later use during GC. */
1323 case R_390_GNU_VTINHERIT:
1324 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1325 return FALSE;
1326 break;
1327
1328 /* This relocation describes which C++ vtable entries are actually
1329 used. Record for later use during GC. */
1330 case R_390_GNU_VTENTRY:
1331 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1332 return FALSE;
1333 break;
1334
1335 default:
1336 break;
1337 }
1338 }
1339
1340 return TRUE;
1341 }
1342
1343 /* Return the section that should be marked against GC for a given
1344 relocation. */
1345
1346 static asection *
1347 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1348 asection *sec;
1349 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1350 Elf_Internal_Rela *rel;
1351 struct elf_link_hash_entry *h;
1352 Elf_Internal_Sym *sym;
1353 {
1354 if (h != NULL)
1355 {
1356 switch (ELF64_R_TYPE (rel->r_info))
1357 {
1358 case R_390_GNU_VTINHERIT:
1359 case R_390_GNU_VTENTRY:
1360 break;
1361
1362 default:
1363 switch (h->root.type)
1364 {
1365 case bfd_link_hash_defined:
1366 case bfd_link_hash_defweak:
1367 return h->root.u.def.section;
1368
1369 case bfd_link_hash_common:
1370 return h->root.u.c.p->section;
1371
1372 default:
1373 break;
1374 }
1375 }
1376 }
1377 else
1378 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1379
1380 return NULL;
1381 }
1382
1383 /* Update the got entry reference counts for the section being removed. */
1384
1385 static bfd_boolean
1386 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1387 bfd *abfd;
1388 struct bfd_link_info *info;
1389 asection *sec;
1390 const Elf_Internal_Rela *relocs;
1391 {
1392 Elf_Internal_Shdr *symtab_hdr;
1393 struct elf_link_hash_entry **sym_hashes;
1394 bfd_signed_vma *local_got_refcounts;
1395 const Elf_Internal_Rela *rel, *relend;
1396
1397 elf_section_data (sec)->local_dynrel = NULL;
1398
1399 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1400 sym_hashes = elf_sym_hashes (abfd);
1401 local_got_refcounts = elf_local_got_refcounts (abfd);
1402
1403 relend = relocs + sec->reloc_count;
1404 for (rel = relocs; rel < relend; rel++)
1405 {
1406 unsigned long r_symndx;
1407 unsigned int r_type;
1408 struct elf_link_hash_entry *h = NULL;
1409
1410 r_symndx = ELF64_R_SYM (rel->r_info);
1411 if (r_symndx >= symtab_hdr->sh_info)
1412 {
1413 struct elf_s390_link_hash_entry *eh;
1414 struct elf_s390_dyn_relocs **pp;
1415 struct elf_s390_dyn_relocs *p;
1416
1417 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1418 while (h->root.type == bfd_link_hash_indirect
1419 || h->root.type == bfd_link_hash_warning)
1420 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1421 eh = (struct elf_s390_link_hash_entry *) h;
1422
1423 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1424 if (p->sec == sec)
1425 {
1426 /* Everything must go for SEC. */
1427 *pp = p->next;
1428 break;
1429 }
1430 }
1431
1432 r_type = ELF64_R_TYPE (rel->r_info);
1433 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1434 switch (r_type)
1435 {
1436 case R_390_TLS_LDM64:
1437 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1438 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1439 break;
1440
1441 case R_390_TLS_GD64:
1442 case R_390_TLS_IE64:
1443 case R_390_TLS_GOTIE12:
1444 case R_390_TLS_GOTIE20:
1445 case R_390_TLS_GOTIE64:
1446 case R_390_TLS_IEENT:
1447 case R_390_GOT12:
1448 case R_390_GOT16:
1449 case R_390_GOT20:
1450 case R_390_GOT32:
1451 case R_390_GOT64:
1452 case R_390_GOTOFF16:
1453 case R_390_GOTOFF32:
1454 case R_390_GOTOFF64:
1455 case R_390_GOTPC:
1456 case R_390_GOTPCDBL:
1457 case R_390_GOTENT:
1458 if (h != NULL)
1459 {
1460 if (h->got.refcount > 0)
1461 h->got.refcount -= 1;
1462 }
1463 else if (local_got_refcounts != NULL)
1464 {
1465 if (local_got_refcounts[r_symndx] > 0)
1466 local_got_refcounts[r_symndx] -= 1;
1467 }
1468 break;
1469
1470 case R_390_8:
1471 case R_390_12:
1472 case R_390_16:
1473 case R_390_20:
1474 case R_390_32:
1475 case R_390_64:
1476 case R_390_PC16:
1477 case R_390_PC16DBL:
1478 case R_390_PC32:
1479 case R_390_PC32DBL:
1480 case R_390_PC64:
1481 if (info->shared)
1482 break;
1483 /* Fall through */
1484
1485 case R_390_PLT16DBL:
1486 case R_390_PLT32:
1487 case R_390_PLT32DBL:
1488 case R_390_PLT64:
1489 case R_390_PLTOFF16:
1490 case R_390_PLTOFF32:
1491 case R_390_PLTOFF64:
1492 if (h != NULL)
1493 {
1494 if (h->plt.refcount > 0)
1495 h->plt.refcount -= 1;
1496 }
1497 break;
1498
1499 case R_390_GOTPLT12:
1500 case R_390_GOTPLT16:
1501 case R_390_GOTPLT20:
1502 case R_390_GOTPLT32:
1503 case R_390_GOTPLT64:
1504 case R_390_GOTPLTENT:
1505 if (h != NULL)
1506 {
1507 if (h->plt.refcount > 0)
1508 {
1509 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1510 h->plt.refcount -= 1;
1511 }
1512 }
1513 else if (local_got_refcounts != NULL)
1514 {
1515 if (local_got_refcounts[r_symndx] > 0)
1516 local_got_refcounts[r_symndx] -= 1;
1517 }
1518 break;
1519
1520 default:
1521 break;
1522 }
1523 }
1524
1525 return TRUE;
1526 }
1527
1528 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1529 entry but we found we will not create any. Called when we find we will
1530 not have any PLT for this symbol, by for example
1531 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1532 or elf_s390_size_dynamic_sections if no dynamic sections will be
1533 created (we're only linking static objects). */
1534
1535 static void
1536 elf_s390_adjust_gotplt (h)
1537 struct elf_s390_link_hash_entry *h;
1538 {
1539 if (h->elf.root.type == bfd_link_hash_warning)
1540 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1541
1542 if (h->gotplt_refcount <= 0)
1543 return;
1544
1545 /* We simply add the number of gotplt references to the number
1546 * of got references for this symbol. */
1547 h->elf.got.refcount += h->gotplt_refcount;
1548 h->gotplt_refcount = -1;
1549 }
1550
1551 /* Adjust a symbol defined by a dynamic object and referenced by a
1552 regular object. The current definition is in some section of the
1553 dynamic object, but we're not including those sections. We have to
1554 change the definition to something the rest of the link can
1555 understand. */
1556
1557 static bfd_boolean
1558 elf_s390_adjust_dynamic_symbol (info, h)
1559 struct bfd_link_info *info;
1560 struct elf_link_hash_entry *h;
1561 {
1562 struct elf_s390_link_hash_table *htab;
1563 asection *s;
1564 unsigned int power_of_two;
1565
1566 /* If this is a function, put it in the procedure linkage table. We
1567 will fill in the contents of the procedure linkage table later
1568 (although we could actually do it here). */
1569 if (h->type == STT_FUNC
1570 || h->needs_plt)
1571 {
1572 if (h->plt.refcount <= 0
1573 || (! info->shared
1574 && !h->def_dynamic
1575 && !h->ref_dynamic
1576 && h->root.type != bfd_link_hash_undefweak
1577 && h->root.type != bfd_link_hash_undefined))
1578 {
1579 /* This case can occur if we saw a PLT32 reloc in an input
1580 file, but the symbol was never referred to by a dynamic
1581 object, or if all references were garbage collected. In
1582 such a case, we don't actually need to build a procedure
1583 linkage table, and we can just do a PC32 reloc instead. */
1584 h->plt.offset = (bfd_vma) -1;
1585 h->needs_plt = 0;
1586 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1587 }
1588
1589 return TRUE;
1590 }
1591 else
1592 /* It's possible that we incorrectly decided a .plt reloc was
1593 needed for an R_390_PC32 reloc to a non-function sym in
1594 check_relocs. We can't decide accurately between function and
1595 non-function syms in check-relocs; Objects loaded later in
1596 the link may change h->type. So fix it now. */
1597 h->plt.offset = (bfd_vma) -1;
1598
1599 /* If this is a weak symbol, and there is a real definition, the
1600 processor independent code will have arranged for us to see the
1601 real definition first, and we can just use the same value. */
1602 if (h->u.weakdef != NULL)
1603 {
1604 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1605 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1606 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1607 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1608 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1609 h->non_got_ref = h->u.weakdef->non_got_ref;
1610 return TRUE;
1611 }
1612
1613 /* This is a reference to a symbol defined by a dynamic object which
1614 is not a function. */
1615
1616 /* If we are creating a shared library, we must presume that the
1617 only references to the symbol are via the global offset table.
1618 For such cases we need not do anything here; the relocations will
1619 be handled correctly by relocate_section. */
1620 if (info->shared)
1621 return TRUE;
1622
1623 /* If there are no references to this symbol that do not use the
1624 GOT, we don't need to generate a copy reloc. */
1625 if (!h->non_got_ref)
1626 return TRUE;
1627
1628 /* If -z nocopyreloc was given, we won't generate them either. */
1629 if (info->nocopyreloc)
1630 {
1631 h->non_got_ref = 0;
1632 return TRUE;
1633 }
1634
1635 if (ELIMINATE_COPY_RELOCS)
1636 {
1637 struct elf_s390_link_hash_entry * eh;
1638 struct elf_s390_dyn_relocs *p;
1639
1640 eh = (struct elf_s390_link_hash_entry *) h;
1641 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1642 {
1643 s = p->sec->output_section;
1644 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1645 break;
1646 }
1647
1648 /* If we didn't find any dynamic relocs in read-only sections, then
1649 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1650 if (p == NULL)
1651 {
1652 h->non_got_ref = 0;
1653 return TRUE;
1654 }
1655 }
1656
1657 if (h->size == 0)
1658 {
1659 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1660 h->root.root.string);
1661 return TRUE;
1662 }
1663
1664 /* We must allocate the symbol in our .dynbss section, which will
1665 become part of the .bss section of the executable. There will be
1666 an entry for this symbol in the .dynsym section. The dynamic
1667 object will contain position independent code, so all references
1668 from the dynamic object to this symbol will go through the global
1669 offset table. The dynamic linker will use the .dynsym entry to
1670 determine the address it must put in the global offset table, so
1671 both the dynamic object and the regular object will refer to the
1672 same memory location for the variable. */
1673
1674 htab = elf_s390_hash_table (info);
1675
1676 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1677 copy the initial value out of the dynamic object and into the
1678 runtime process image. */
1679 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1680 {
1681 htab->srelbss->size += sizeof (Elf64_External_Rela);
1682 h->needs_copy = 1;
1683 }
1684
1685 /* We need to figure out the alignment required for this symbol. I
1686 have no idea how ELF linkers handle this. */
1687 power_of_two = bfd_log2 (h->size);
1688 if (power_of_two > 3)
1689 power_of_two = 3;
1690
1691 /* Apply the required alignment. */
1692 s = htab->sdynbss;
1693 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1694 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1695 {
1696 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1697 return FALSE;
1698 }
1699
1700 /* Define the symbol as being at this point in the section. */
1701 h->root.u.def.section = s;
1702 h->root.u.def.value = s->size;
1703
1704 /* Increment the section size to make room for the symbol. */
1705 s->size += h->size;
1706
1707 return TRUE;
1708 }
1709
1710 /* Allocate space in .plt, .got and associated reloc sections for
1711 dynamic relocs. */
1712
1713 static bfd_boolean
1714 allocate_dynrelocs (h, inf)
1715 struct elf_link_hash_entry *h;
1716 PTR inf;
1717 {
1718 struct bfd_link_info *info;
1719 struct elf_s390_link_hash_table *htab;
1720 struct elf_s390_link_hash_entry *eh;
1721 struct elf_s390_dyn_relocs *p;
1722
1723 if (h->root.type == bfd_link_hash_indirect)
1724 return TRUE;
1725
1726 if (h->root.type == bfd_link_hash_warning)
1727 /* When warning symbols are created, they **replace** the "real"
1728 entry in the hash table, thus we never get to see the real
1729 symbol in a hash traversal. So look at it now. */
1730 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1731
1732 info = (struct bfd_link_info *) inf;
1733 htab = elf_s390_hash_table (info);
1734
1735 if (htab->elf.dynamic_sections_created
1736 && h->plt.refcount > 0
1737 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1738 || h->root.type != bfd_link_hash_undefweak))
1739 {
1740 /* Make sure this symbol is output as a dynamic symbol.
1741 Undefined weak syms won't yet be marked as dynamic. */
1742 if (h->dynindx == -1
1743 && !h->forced_local)
1744 {
1745 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1746 return FALSE;
1747 }
1748
1749 if (info->shared
1750 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1751 {
1752 asection *s = htab->splt;
1753
1754 /* If this is the first .plt entry, make room for the special
1755 first entry. */
1756 if (s->size == 0)
1757 s->size += PLT_FIRST_ENTRY_SIZE;
1758
1759 h->plt.offset = s->size;
1760
1761 /* If this symbol is not defined in a regular file, and we are
1762 not generating a shared library, then set the symbol to this
1763 location in the .plt. This is required to make function
1764 pointers compare as equal between the normal executable and
1765 the shared library. */
1766 if (! info->shared
1767 && !h->def_regular)
1768 {
1769 h->root.u.def.section = s;
1770 h->root.u.def.value = h->plt.offset;
1771 }
1772
1773 /* Make room for this entry. */
1774 s->size += PLT_ENTRY_SIZE;
1775
1776 /* We also need to make an entry in the .got.plt section, which
1777 will be placed in the .got section by the linker script. */
1778 htab->sgotplt->size += GOT_ENTRY_SIZE;
1779
1780 /* We also need to make an entry in the .rela.plt section. */
1781 htab->srelplt->size += sizeof (Elf64_External_Rela);
1782 }
1783 else
1784 {
1785 h->plt.offset = (bfd_vma) -1;
1786 h->needs_plt = 0;
1787 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1788 }
1789 }
1790 else
1791 {
1792 h->plt.offset = (bfd_vma) -1;
1793 h->needs_plt = 0;
1794 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1795 }
1796
1797 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1798 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1799 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1800 we can save the dynamic TLS relocation. */
1801 if (h->got.refcount > 0
1802 && !info->shared
1803 && h->dynindx == -1
1804 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1805 {
1806 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1807 /* For the GOTIE access without a literal pool entry the offset has
1808 to be stored somewhere. The immediate value in the instruction
1809 is not bit enough so the value is stored in the got. */
1810 {
1811 h->got.offset = htab->sgot->size;
1812 htab->sgot->size += GOT_ENTRY_SIZE;
1813 }
1814 else
1815 h->got.offset = (bfd_vma) -1;
1816 }
1817 else if (h->got.refcount > 0)
1818 {
1819 asection *s;
1820 bfd_boolean dyn;
1821 int tls_type = elf_s390_hash_entry(h)->tls_type;
1822
1823 /* Make sure this symbol is output as a dynamic symbol.
1824 Undefined weak syms won't yet be marked as dynamic. */
1825 if (h->dynindx == -1
1826 && !h->forced_local)
1827 {
1828 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1829 return FALSE;
1830 }
1831
1832 s = htab->sgot;
1833 h->got.offset = s->size;
1834 s->size += GOT_ENTRY_SIZE;
1835 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1836 if (tls_type == GOT_TLS_GD)
1837 s->size += GOT_ENTRY_SIZE;
1838 dyn = htab->elf.dynamic_sections_created;
1839 /* R_390_TLS_IE64 needs one dynamic relocation,
1840 R_390_TLS_GD64 needs one if local symbol and two if global. */
1841 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1842 || tls_type >= GOT_TLS_IE)
1843 htab->srelgot->size += sizeof (Elf64_External_Rela);
1844 else if (tls_type == GOT_TLS_GD)
1845 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1846 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1847 || h->root.type != bfd_link_hash_undefweak)
1848 && (info->shared
1849 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1850 htab->srelgot->size += sizeof (Elf64_External_Rela);
1851 }
1852 else
1853 h->got.offset = (bfd_vma) -1;
1854
1855 eh = (struct elf_s390_link_hash_entry *) h;
1856 if (eh->dyn_relocs == NULL)
1857 return TRUE;
1858
1859 /* In the shared -Bsymbolic case, discard space allocated for
1860 dynamic pc-relative relocs against symbols which turn out to be
1861 defined in regular objects. For the normal shared case, discard
1862 space for pc-relative relocs that have become local due to symbol
1863 visibility changes. */
1864
1865 if (info->shared)
1866 {
1867 if (SYMBOL_REFERENCES_LOCAL (info, h))
1868 {
1869 struct elf_s390_dyn_relocs **pp;
1870
1871 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1872 {
1873 p->count -= p->pc_count;
1874 p->pc_count = 0;
1875 if (p->count == 0)
1876 *pp = p->next;
1877 else
1878 pp = &p->next;
1879 }
1880 }
1881
1882 /* Also discard relocs on undefined weak syms with non-default
1883 visibility. */
1884 if (eh->dyn_relocs != NULL
1885 && h->root.type == bfd_link_hash_undefweak)
1886 {
1887 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1888 eh->dyn_relocs = NULL;
1889
1890 /* Make sure undefined weak symbols are output as a dynamic
1891 symbol in PIEs. */
1892 else if (h->dynindx == -1
1893 && !h->forced_local)
1894 {
1895 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1896 return FALSE;
1897 }
1898 }
1899 }
1900 else if (ELIMINATE_COPY_RELOCS)
1901 {
1902 /* For the non-shared case, discard space for relocs against
1903 symbols which turn out to need copy relocs or are not
1904 dynamic. */
1905
1906 if (!h->non_got_ref
1907 && ((h->def_dynamic
1908 && !h->def_regular)
1909 || (htab->elf.dynamic_sections_created
1910 && (h->root.type == bfd_link_hash_undefweak
1911 || h->root.type == bfd_link_hash_undefined))))
1912 {
1913 /* Make sure this symbol is output as a dynamic symbol.
1914 Undefined weak syms won't yet be marked as dynamic. */
1915 if (h->dynindx == -1
1916 && !h->forced_local)
1917 {
1918 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1919 return FALSE;
1920 }
1921
1922 /* If that succeeded, we know we'll be keeping all the
1923 relocs. */
1924 if (h->dynindx != -1)
1925 goto keep;
1926 }
1927
1928 eh->dyn_relocs = NULL;
1929
1930 keep: ;
1931 }
1932
1933 /* Finally, allocate space. */
1934 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1935 {
1936 asection *sreloc = elf_section_data (p->sec)->sreloc;
1937 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1938 }
1939
1940 return TRUE;
1941 }
1942
1943 /* Find any dynamic relocs that apply to read-only sections. */
1944
1945 static bfd_boolean
1946 readonly_dynrelocs (h, inf)
1947 struct elf_link_hash_entry *h;
1948 PTR inf;
1949 {
1950 struct elf_s390_link_hash_entry *eh;
1951 struct elf_s390_dyn_relocs *p;
1952
1953 if (h->root.type == bfd_link_hash_warning)
1954 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1955
1956 eh = (struct elf_s390_link_hash_entry *) h;
1957 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1958 {
1959 asection *s = p->sec->output_section;
1960
1961 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1962 {
1963 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1964
1965 info->flags |= DF_TEXTREL;
1966
1967 /* Not an error, just cut short the traversal. */
1968 return FALSE;
1969 }
1970 }
1971 return TRUE;
1972 }
1973
1974 /* Set the sizes of the dynamic sections. */
1975
1976 static bfd_boolean
1977 elf_s390_size_dynamic_sections (output_bfd, info)
1978 bfd *output_bfd ATTRIBUTE_UNUSED;
1979 struct bfd_link_info *info;
1980 {
1981 struct elf_s390_link_hash_table *htab;
1982 bfd *dynobj;
1983 asection *s;
1984 bfd_boolean relocs;
1985 bfd *ibfd;
1986
1987 htab = elf_s390_hash_table (info);
1988 dynobj = htab->elf.dynobj;
1989 if (dynobj == NULL)
1990 abort ();
1991
1992 if (htab->elf.dynamic_sections_created)
1993 {
1994 /* Set the contents of the .interp section to the interpreter. */
1995 if (info->executable)
1996 {
1997 s = bfd_get_section_by_name (dynobj, ".interp");
1998 if (s == NULL)
1999 abort ();
2000 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2001 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2002 }
2003 }
2004
2005 /* Set up .got offsets for local syms, and space for local dynamic
2006 relocs. */
2007 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2008 {
2009 bfd_signed_vma *local_got;
2010 bfd_signed_vma *end_local_got;
2011 char *local_tls_type;
2012 bfd_size_type locsymcount;
2013 Elf_Internal_Shdr *symtab_hdr;
2014 asection *srela;
2015
2016 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2017 continue;
2018
2019 for (s = ibfd->sections; s != NULL; s = s->next)
2020 {
2021 struct elf_s390_dyn_relocs *p;
2022
2023 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2024 {
2025 if (!bfd_is_abs_section (p->sec)
2026 && bfd_is_abs_section (p->sec->output_section))
2027 {
2028 /* Input section has been discarded, either because
2029 it is a copy of a linkonce section or due to
2030 linker script /DISCARD/, so we'll be discarding
2031 the relocs too. */
2032 }
2033 else if (p->count != 0)
2034 {
2035 srela = elf_section_data (p->sec)->sreloc;
2036 srela->size += p->count * sizeof (Elf64_External_Rela);
2037 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2038 info->flags |= DF_TEXTREL;
2039 }
2040 }
2041 }
2042
2043 local_got = elf_local_got_refcounts (ibfd);
2044 if (!local_got)
2045 continue;
2046
2047 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2048 locsymcount = symtab_hdr->sh_info;
2049 end_local_got = local_got + locsymcount;
2050 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2051 s = htab->sgot;
2052 srela = htab->srelgot;
2053 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2054 {
2055 if (*local_got > 0)
2056 {
2057 *local_got = s->size;
2058 s->size += GOT_ENTRY_SIZE;
2059 if (*local_tls_type == GOT_TLS_GD)
2060 s->size += GOT_ENTRY_SIZE;
2061 if (info->shared)
2062 srela->size += sizeof (Elf64_External_Rela);
2063 }
2064 else
2065 *local_got = (bfd_vma) -1;
2066 }
2067 }
2068
2069 if (htab->tls_ldm_got.refcount > 0)
2070 {
2071 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2072 relocs. */
2073 htab->tls_ldm_got.offset = htab->sgot->size;
2074 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2075 htab->srelgot->size += sizeof (Elf64_External_Rela);
2076 }
2077 else
2078 htab->tls_ldm_got.offset = -1;
2079
2080 /* Allocate global sym .plt and .got entries, and space for global
2081 sym dynamic relocs. */
2082 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2083
2084 /* We now have determined the sizes of the various dynamic sections.
2085 Allocate memory for them. */
2086 relocs = FALSE;
2087 for (s = dynobj->sections; s != NULL; s = s->next)
2088 {
2089 if ((s->flags & SEC_LINKER_CREATED) == 0)
2090 continue;
2091
2092 if (s == htab->splt
2093 || s == htab->sgot
2094 || s == htab->sgotplt
2095 || s == htab->sdynbss)
2096 {
2097 /* Strip this section if we don't need it; see the
2098 comment below. */
2099 }
2100 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2101 {
2102 if (s->size != 0 && s != htab->srelplt)
2103 relocs = TRUE;
2104
2105 /* We use the reloc_count field as a counter if we need
2106 to copy relocs into the output file. */
2107 s->reloc_count = 0;
2108 }
2109 else
2110 {
2111 /* It's not one of our sections, so don't allocate space. */
2112 continue;
2113 }
2114
2115 if (s->size == 0)
2116 {
2117 /* If we don't need this section, strip it from the
2118 output file. This is to handle .rela.bss and
2119 .rela.plt. We must create it in
2120 create_dynamic_sections, because it must be created
2121 before the linker maps input sections to output
2122 sections. The linker does that before
2123 adjust_dynamic_symbol is called, and it is that
2124 function which decides whether anything needs to go
2125 into these sections. */
2126
2127 s->flags |= SEC_EXCLUDE;
2128 continue;
2129 }
2130
2131 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2132 continue;
2133
2134 /* Allocate memory for the section contents. We use bfd_zalloc
2135 here in case unused entries are not reclaimed before the
2136 section's contents are written out. This should not happen,
2137 but this way if it does, we get a R_390_NONE reloc instead
2138 of garbage. */
2139 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2140 if (s->contents == NULL)
2141 return FALSE;
2142 }
2143
2144 if (htab->elf.dynamic_sections_created)
2145 {
2146 /* Add some entries to the .dynamic section. We fill in the
2147 values later, in elf_s390_finish_dynamic_sections, but we
2148 must add the entries now so that we get the correct size for
2149 the .dynamic section. The DT_DEBUG entry is filled in by the
2150 dynamic linker and used by the debugger. */
2151 #define add_dynamic_entry(TAG, VAL) \
2152 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2153
2154 if (info->executable)
2155 {
2156 if (!add_dynamic_entry (DT_DEBUG, 0))
2157 return FALSE;
2158 }
2159
2160 if (htab->splt->size != 0)
2161 {
2162 if (!add_dynamic_entry (DT_PLTGOT, 0)
2163 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2164 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2165 || !add_dynamic_entry (DT_JMPREL, 0))
2166 return FALSE;
2167 }
2168
2169 if (relocs)
2170 {
2171 if (!add_dynamic_entry (DT_RELA, 0)
2172 || !add_dynamic_entry (DT_RELASZ, 0)
2173 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2174 return FALSE;
2175
2176 /* If any dynamic relocs apply to a read-only section,
2177 then we need a DT_TEXTREL entry. */
2178 if ((info->flags & DF_TEXTREL) == 0)
2179 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2180 (PTR) info);
2181
2182 if ((info->flags & DF_TEXTREL) != 0)
2183 {
2184 if (!add_dynamic_entry (DT_TEXTREL, 0))
2185 return FALSE;
2186 }
2187 }
2188 }
2189 #undef add_dynamic_entry
2190
2191 return TRUE;
2192 }
2193
2194 /* Return the base VMA address which should be subtracted from real addresses
2195 when resolving @dtpoff relocation.
2196 This is PT_TLS segment p_vaddr. */
2197
2198 static bfd_vma
2199 dtpoff_base (info)
2200 struct bfd_link_info *info;
2201 {
2202 /* If tls_sec is NULL, we should have signalled an error already. */
2203 if (elf_hash_table (info)->tls_sec == NULL)
2204 return 0;
2205 return elf_hash_table (info)->tls_sec->vma;
2206 }
2207
2208 /* Return the relocation value for @tpoff relocation
2209 if STT_TLS virtual address is ADDRESS. */
2210
2211 static bfd_vma
2212 tpoff (info, address)
2213 struct bfd_link_info *info;
2214 bfd_vma address;
2215 {
2216 struct elf_link_hash_table *htab = elf_hash_table (info);
2217
2218 /* If tls_sec is NULL, we should have signalled an error already. */
2219 if (htab->tls_sec == NULL)
2220 return 0;
2221 return htab->tls_size + htab->tls_sec->vma - address;
2222 }
2223
2224 /* Complain if TLS instruction relocation is against an invalid
2225 instruction. */
2226
2227 static void
2228 invalid_tls_insn (input_bfd, input_section, rel)
2229 bfd *input_bfd;
2230 asection *input_section;
2231 Elf_Internal_Rela *rel;
2232 {
2233 reloc_howto_type *howto;
2234
2235 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2236 (*_bfd_error_handler)
2237 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2238 input_bfd,
2239 input_section,
2240 (long) rel->r_offset,
2241 howto->name);
2242 }
2243
2244 /* Relocate a 390 ELF section. */
2245
2246 static bfd_boolean
2247 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2248 contents, relocs, local_syms, local_sections)
2249 bfd *output_bfd;
2250 struct bfd_link_info *info;
2251 bfd *input_bfd;
2252 asection *input_section;
2253 bfd_byte *contents;
2254 Elf_Internal_Rela *relocs;
2255 Elf_Internal_Sym *local_syms;
2256 asection **local_sections;
2257 {
2258 struct elf_s390_link_hash_table *htab;
2259 Elf_Internal_Shdr *symtab_hdr;
2260 struct elf_link_hash_entry **sym_hashes;
2261 bfd_vma *local_got_offsets;
2262 Elf_Internal_Rela *rel;
2263 Elf_Internal_Rela *relend;
2264
2265 if (info->relocatable)
2266 return TRUE;
2267
2268 htab = elf_s390_hash_table (info);
2269 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2270 sym_hashes = elf_sym_hashes (input_bfd);
2271 local_got_offsets = elf_local_got_offsets (input_bfd);
2272
2273 rel = relocs;
2274 relend = relocs + input_section->reloc_count;
2275 for (; rel < relend; rel++)
2276 {
2277 unsigned int r_type;
2278 reloc_howto_type *howto;
2279 unsigned long r_symndx;
2280 struct elf_link_hash_entry *h;
2281 Elf_Internal_Sym *sym;
2282 asection *sec;
2283 bfd_vma off;
2284 bfd_vma relocation;
2285 bfd_boolean unresolved_reloc;
2286 bfd_reloc_status_type r;
2287 int tls_type;
2288
2289 r_type = ELF64_R_TYPE (rel->r_info);
2290 if (r_type == (int) R_390_GNU_VTINHERIT
2291 || r_type == (int) R_390_GNU_VTENTRY)
2292 continue;
2293 if (r_type >= (int) R_390_max)
2294 {
2295 bfd_set_error (bfd_error_bad_value);
2296 return FALSE;
2297 }
2298
2299 howto = elf_howto_table + r_type;
2300 r_symndx = ELF64_R_SYM (rel->r_info);
2301
2302 /* This is a final link. */
2303 h = NULL;
2304 sym = NULL;
2305 sec = NULL;
2306 unresolved_reloc = FALSE;
2307 if (r_symndx < symtab_hdr->sh_info)
2308 {
2309 sym = local_syms + r_symndx;
2310 sec = local_sections[r_symndx];
2311 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2312 }
2313 else
2314 {
2315 bfd_boolean warned ATTRIBUTE_UNUSED;
2316
2317 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2318 r_symndx, symtab_hdr, sym_hashes,
2319 h, sec, relocation,
2320 unresolved_reloc, warned);
2321 }
2322
2323 switch (r_type)
2324 {
2325 case R_390_GOTPLT12:
2326 case R_390_GOTPLT16:
2327 case R_390_GOTPLT20:
2328 case R_390_GOTPLT32:
2329 case R_390_GOTPLT64:
2330 case R_390_GOTPLTENT:
2331 /* There are three cases for a GOTPLT relocation. 1) The
2332 relocation is against the jump slot entry of a plt that
2333 will get emitted to the output file. 2) The relocation
2334 is against the jump slot of a plt entry that has been
2335 removed. elf_s390_adjust_gotplt has created a GOT entry
2336 as replacement. 3) The relocation is against a local symbol.
2337 Cases 2) and 3) are the same as the GOT relocation code
2338 so we just have to test for case 1 and fall through for
2339 the other two. */
2340 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2341 {
2342 bfd_vma plt_index;
2343
2344 /* Calc. index no.
2345 Current offset - size first entry / entry size. */
2346 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2347 PLT_ENTRY_SIZE;
2348
2349 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2350 addr & GOT addr. */
2351 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2352 unresolved_reloc = FALSE;
2353
2354 if (r_type == R_390_GOTPLTENT)
2355 relocation += htab->sgot->output_section->vma;
2356 break;
2357 }
2358 /* Fall through. */
2359
2360 case R_390_GOT12:
2361 case R_390_GOT16:
2362 case R_390_GOT20:
2363 case R_390_GOT32:
2364 case R_390_GOT64:
2365 case R_390_GOTENT:
2366 /* Relocation is to the entry for this symbol in the global
2367 offset table. */
2368 if (htab->sgot == NULL)
2369 abort ();
2370
2371 if (h != NULL)
2372 {
2373 bfd_boolean dyn;
2374
2375 off = h->got.offset;
2376 dyn = htab->elf.dynamic_sections_created;
2377 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2378 || (info->shared
2379 && (info->symbolic
2380 || h->dynindx == -1
2381 || h->forced_local)
2382 && h->def_regular)
2383 || (ELF_ST_VISIBILITY (h->other)
2384 && h->root.type == bfd_link_hash_undefweak))
2385 {
2386 /* This is actually a static link, or it is a
2387 -Bsymbolic link and the symbol is defined
2388 locally, or the symbol was forced to be local
2389 because of a version file. We must initialize
2390 this entry in the global offset table. Since the
2391 offset must always be a multiple of 2, we use the
2392 least significant bit to record whether we have
2393 initialized it already.
2394
2395 When doing a dynamic link, we create a .rel.got
2396 relocation entry to initialize the value. This
2397 is done in the finish_dynamic_symbol routine. */
2398 if ((off & 1) != 0)
2399 off &= ~1;
2400 else
2401 {
2402 bfd_put_64 (output_bfd, relocation,
2403 htab->sgot->contents + off);
2404 h->got.offset |= 1;
2405 }
2406 }
2407 else
2408 unresolved_reloc = FALSE;
2409 }
2410 else
2411 {
2412 if (local_got_offsets == NULL)
2413 abort ();
2414
2415 off = local_got_offsets[r_symndx];
2416
2417 /* The offset must always be a multiple of 8. We use
2418 the least significant bit to record whether we have
2419 already generated the necessary reloc. */
2420 if ((off & 1) != 0)
2421 off &= ~1;
2422 else
2423 {
2424 bfd_put_64 (output_bfd, relocation,
2425 htab->sgot->contents + off);
2426
2427 if (info->shared)
2428 {
2429 asection *s;
2430 Elf_Internal_Rela outrel;
2431 bfd_byte *loc;
2432
2433 s = htab->srelgot;
2434 if (s == NULL)
2435 abort ();
2436
2437 outrel.r_offset = (htab->sgot->output_section->vma
2438 + htab->sgot->output_offset
2439 + off);
2440 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2441 outrel.r_addend = relocation;
2442 loc = s->contents;
2443 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2444 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2445 }
2446
2447 local_got_offsets[r_symndx] |= 1;
2448 }
2449 }
2450
2451 if (off >= (bfd_vma) -2)
2452 abort ();
2453
2454 relocation = htab->sgot->output_offset + off;
2455
2456 /* For @GOTENT the relocation is against the offset between
2457 the instruction and the symbols entry in the GOT and not
2458 between the start of the GOT and the symbols entry. We
2459 add the vma of the GOT to get the correct value. */
2460 if ( r_type == R_390_GOTENT
2461 || r_type == R_390_GOTPLTENT)
2462 relocation += htab->sgot->output_section->vma;
2463
2464 break;
2465
2466 case R_390_GOTOFF16:
2467 case R_390_GOTOFF32:
2468 case R_390_GOTOFF64:
2469 /* Relocation is relative to the start of the global offset
2470 table. */
2471
2472 /* Note that sgot->output_offset is not involved in this
2473 calculation. We always want the start of .got. If we
2474 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2475 permitted by the ABI, we might have to change this
2476 calculation. */
2477 relocation -= htab->sgot->output_section->vma;
2478 break;
2479
2480 case R_390_GOTPC:
2481 case R_390_GOTPCDBL:
2482 /* Use global offset table as symbol value. */
2483 relocation = htab->sgot->output_section->vma;
2484 unresolved_reloc = FALSE;
2485 break;
2486
2487 case R_390_PLT16DBL:
2488 case R_390_PLT32:
2489 case R_390_PLT32DBL:
2490 case R_390_PLT64:
2491 /* Relocation is to the entry for this symbol in the
2492 procedure linkage table. */
2493
2494 /* Resolve a PLT32 reloc against a local symbol directly,
2495 without using the procedure linkage table. */
2496 if (h == NULL)
2497 break;
2498
2499 if (h->plt.offset == (bfd_vma) -1
2500 || htab->splt == NULL)
2501 {
2502 /* We didn't make a PLT entry for this symbol. This
2503 happens when statically linking PIC code, or when
2504 using -Bsymbolic. */
2505 break;
2506 }
2507
2508 relocation = (htab->splt->output_section->vma
2509 + htab->splt->output_offset
2510 + h->plt.offset);
2511 unresolved_reloc = FALSE;
2512 break;
2513
2514 case R_390_PLTOFF16:
2515 case R_390_PLTOFF32:
2516 case R_390_PLTOFF64:
2517 /* Relocation is to the entry for this symbol in the
2518 procedure linkage table relative to the start of the GOT. */
2519
2520 /* For local symbols or if we didn't make a PLT entry for
2521 this symbol resolve the symbol directly. */
2522 if ( h == NULL
2523 || h->plt.offset == (bfd_vma) -1
2524 || htab->splt == NULL)
2525 {
2526 relocation -= htab->sgot->output_section->vma;
2527 break;
2528 }
2529
2530 relocation = (htab->splt->output_section->vma
2531 + htab->splt->output_offset
2532 + h->plt.offset
2533 - htab->sgot->output_section->vma);
2534 unresolved_reloc = FALSE;
2535 break;
2536
2537 case R_390_8:
2538 case R_390_16:
2539 case R_390_32:
2540 case R_390_64:
2541 case R_390_PC16:
2542 case R_390_PC16DBL:
2543 case R_390_PC32:
2544 case R_390_PC32DBL:
2545 case R_390_PC64:
2546 /* r_symndx will be zero only for relocs against symbols
2547 from removed linkonce sections, or sections discarded by
2548 a linker script. */
2549 if (r_symndx == 0
2550 || (input_section->flags & SEC_ALLOC) == 0)
2551 break;
2552
2553 if ((info->shared
2554 && (h == NULL
2555 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2556 || h->root.type != bfd_link_hash_undefweak)
2557 && ((r_type != R_390_PC16
2558 && r_type != R_390_PC16DBL
2559 && r_type != R_390_PC32
2560 && r_type != R_390_PC32DBL
2561 && r_type != R_390_PC64)
2562 || (h != NULL
2563 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2564 || (ELIMINATE_COPY_RELOCS
2565 && !info->shared
2566 && h != NULL
2567 && h->dynindx != -1
2568 && !h->non_got_ref
2569 && ((h->def_dynamic
2570 && !h->def_regular)
2571 || h->root.type == bfd_link_hash_undefweak
2572 || h->root.type == bfd_link_hash_undefined)))
2573 {
2574 Elf_Internal_Rela outrel;
2575 bfd_boolean skip, relocate;
2576 asection *sreloc;
2577 bfd_byte *loc;
2578
2579 /* When generating a shared object, these relocations
2580 are copied into the output file to be resolved at run
2581 time. */
2582 skip = FALSE;
2583 relocate = FALSE;
2584
2585 outrel.r_offset =
2586 _bfd_elf_section_offset (output_bfd, info, input_section,
2587 rel->r_offset);
2588 if (outrel.r_offset == (bfd_vma) -1)
2589 skip = TRUE;
2590 else if (outrel.r_offset == (bfd_vma) -2)
2591 skip = TRUE, relocate = TRUE;
2592
2593 outrel.r_offset += (input_section->output_section->vma
2594 + input_section->output_offset);
2595
2596 if (skip)
2597 memset (&outrel, 0, sizeof outrel);
2598 else if (h != NULL
2599 && h->dynindx != -1
2600 && (r_type == R_390_PC16
2601 || r_type == R_390_PC16DBL
2602 || r_type == R_390_PC32
2603 || r_type == R_390_PC32DBL
2604 || r_type == R_390_PC64
2605 || !info->shared
2606 || !info->symbolic
2607 || !h->def_regular))
2608 {
2609 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2610 outrel.r_addend = rel->r_addend;
2611 }
2612 else
2613 {
2614 /* This symbol is local, or marked to become local. */
2615 outrel.r_addend = relocation + rel->r_addend;
2616 if (r_type == R_390_64)
2617 {
2618 relocate = TRUE;
2619 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2620 }
2621 else
2622 {
2623 long sindx;
2624
2625 if (bfd_is_abs_section (sec))
2626 sindx = 0;
2627 else if (sec == NULL || sec->owner == NULL)
2628 {
2629 bfd_set_error(bfd_error_bad_value);
2630 return FALSE;
2631 }
2632 else
2633 {
2634 asection *osec;
2635
2636 osec = sec->output_section;
2637 sindx = elf_section_data (osec)->dynindx;
2638 BFD_ASSERT (sindx > 0);
2639
2640 /* We are turning this relocation into one
2641 against a section symbol, so subtract out
2642 the output section's address but not the
2643 offset of the input section in the output
2644 section. */
2645
2646 outrel.r_addend -= osec->vma;
2647 }
2648 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2649 }
2650 }
2651
2652 sreloc = elf_section_data (input_section)->sreloc;
2653 if (sreloc == NULL)
2654 abort ();
2655
2656 loc = sreloc->contents;
2657 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2658 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2659
2660 /* If this reloc is against an external symbol, we do
2661 not want to fiddle with the addend. Otherwise, we
2662 need to include the symbol value so that it becomes
2663 an addend for the dynamic reloc. */
2664 if (! relocate)
2665 continue;
2666 }
2667
2668 break;
2669
2670 /* Relocations for tls literal pool entries. */
2671 case R_390_TLS_IE64:
2672 if (info->shared)
2673 {
2674 Elf_Internal_Rela outrel;
2675 asection *sreloc;
2676 bfd_byte *loc;
2677
2678 outrel.r_offset = rel->r_offset
2679 + input_section->output_section->vma
2680 + input_section->output_offset;
2681 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2682 sreloc = elf_section_data (input_section)->sreloc;
2683 if (sreloc == NULL)
2684 abort ();
2685 loc = sreloc->contents;
2686 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2687 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2688 }
2689 /* Fall through. */
2690
2691 case R_390_TLS_GD64:
2692 case R_390_TLS_GOTIE64:
2693 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2694 tls_type = GOT_UNKNOWN;
2695 if (h == NULL && local_got_offsets)
2696 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2697 else if (h != NULL)
2698 {
2699 tls_type = elf_s390_hash_entry(h)->tls_type;
2700 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2701 r_type = R_390_TLS_LE64;
2702 }
2703 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2704 r_type = R_390_TLS_IE64;
2705
2706 if (r_type == R_390_TLS_LE64)
2707 {
2708 /* This relocation gets optimized away by the local exec
2709 access optimization. */
2710 BFD_ASSERT (! unresolved_reloc);
2711 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2712 contents + rel->r_offset);
2713 continue;
2714 }
2715
2716 if (htab->sgot == NULL)
2717 abort ();
2718
2719 if (h != NULL)
2720 off = h->got.offset;
2721 else
2722 {
2723 if (local_got_offsets == NULL)
2724 abort ();
2725
2726 off = local_got_offsets[r_symndx];
2727 }
2728
2729 emit_tls_relocs:
2730
2731 if ((off & 1) != 0)
2732 off &= ~1;
2733 else
2734 {
2735 Elf_Internal_Rela outrel;
2736 bfd_byte *loc;
2737 int dr_type, indx;
2738
2739 if (htab->srelgot == NULL)
2740 abort ();
2741
2742 outrel.r_offset = (htab->sgot->output_section->vma
2743 + htab->sgot->output_offset + off);
2744
2745 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2746 if (r_type == R_390_TLS_GD64)
2747 dr_type = R_390_TLS_DTPMOD;
2748 else
2749 dr_type = R_390_TLS_TPOFF;
2750 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2751 outrel.r_addend = relocation - dtpoff_base (info);
2752 else
2753 outrel.r_addend = 0;
2754 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2755 loc = htab->srelgot->contents;
2756 loc += htab->srelgot->reloc_count++
2757 * sizeof (Elf64_External_Rela);
2758 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2759
2760 if (r_type == R_390_TLS_GD64)
2761 {
2762 if (indx == 0)
2763 {
2764 BFD_ASSERT (! unresolved_reloc);
2765 bfd_put_64 (output_bfd,
2766 relocation - dtpoff_base (info),
2767 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2768 }
2769 else
2770 {
2771 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2772 outrel.r_offset += GOT_ENTRY_SIZE;
2773 outrel.r_addend = 0;
2774 htab->srelgot->reloc_count++;
2775 loc += sizeof (Elf64_External_Rela);
2776 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2777 }
2778 }
2779
2780 if (h != NULL)
2781 h->got.offset |= 1;
2782 else
2783 local_got_offsets[r_symndx] |= 1;
2784 }
2785
2786 if (off >= (bfd_vma) -2)
2787 abort ();
2788 if (r_type == ELF64_R_TYPE (rel->r_info))
2789 {
2790 relocation = htab->sgot->output_offset + off;
2791 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2792 relocation += htab->sgot->output_section->vma;
2793 unresolved_reloc = FALSE;
2794 }
2795 else
2796 {
2797 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2798 contents + rel->r_offset);
2799 continue;
2800 }
2801 break;
2802
2803 case R_390_TLS_GOTIE12:
2804 case R_390_TLS_GOTIE20:
2805 case R_390_TLS_IEENT:
2806 if (h == NULL)
2807 {
2808 if (local_got_offsets == NULL)
2809 abort();
2810 off = local_got_offsets[r_symndx];
2811 if (info->shared)
2812 goto emit_tls_relocs;
2813 }
2814 else
2815 {
2816 off = h->got.offset;
2817 tls_type = elf_s390_hash_entry(h)->tls_type;
2818 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2819 goto emit_tls_relocs;
2820 }
2821
2822 if (htab->sgot == NULL)
2823 abort ();
2824
2825 BFD_ASSERT (! unresolved_reloc);
2826 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2827 htab->sgot->contents + off);
2828 relocation = htab->sgot->output_offset + off;
2829 if (r_type == R_390_TLS_IEENT)
2830 relocation += htab->sgot->output_section->vma;
2831 unresolved_reloc = FALSE;
2832 break;
2833
2834 case R_390_TLS_LDM64:
2835 if (! info->shared)
2836 /* The literal pool entry this relocation refers to gets ignored
2837 by the optimized code of the local exec model. Do nothing
2838 and the value will turn out zero. */
2839 continue;
2840
2841 if (htab->sgot == NULL)
2842 abort ();
2843
2844 off = htab->tls_ldm_got.offset;
2845 if (off & 1)
2846 off &= ~1;
2847 else
2848 {
2849 Elf_Internal_Rela outrel;
2850 bfd_byte *loc;
2851
2852 if (htab->srelgot == NULL)
2853 abort ();
2854
2855 outrel.r_offset = (htab->sgot->output_section->vma
2856 + htab->sgot->output_offset + off);
2857
2858 bfd_put_64 (output_bfd, 0,
2859 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2860 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2861 outrel.r_addend = 0;
2862 loc = htab->srelgot->contents;
2863 loc += htab->srelgot->reloc_count++
2864 * sizeof (Elf64_External_Rela);
2865 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2866 htab->tls_ldm_got.offset |= 1;
2867 }
2868 relocation = htab->sgot->output_offset + off;
2869 unresolved_reloc = FALSE;
2870 break;
2871
2872 case R_390_TLS_LE64:
2873 if (info->shared)
2874 {
2875 /* Linking a shared library with non-fpic code requires
2876 a R_390_TLS_TPOFF relocation. */
2877 Elf_Internal_Rela outrel;
2878 asection *sreloc;
2879 bfd_byte *loc;
2880 int indx;
2881
2882 outrel.r_offset = rel->r_offset
2883 + input_section->output_section->vma
2884 + input_section->output_offset;
2885 if (h != NULL && h->dynindx != -1)
2886 indx = h->dynindx;
2887 else
2888 indx = 0;
2889 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2890 if (indx == 0)
2891 outrel.r_addend = relocation - dtpoff_base (info);
2892 else
2893 outrel.r_addend = 0;
2894 sreloc = elf_section_data (input_section)->sreloc;
2895 if (sreloc == NULL)
2896 abort ();
2897 loc = sreloc->contents;
2898 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2899 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2900 }
2901 else
2902 {
2903 BFD_ASSERT (! unresolved_reloc);
2904 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2905 contents + rel->r_offset);
2906 }
2907 continue;
2908
2909 case R_390_TLS_LDO64:
2910 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2911 relocation -= dtpoff_base (info);
2912 else
2913 /* When converting LDO to LE, we must negate. */
2914 relocation = -tpoff (info, relocation);
2915 break;
2916
2917 /* Relocations for tls instructions. */
2918 case R_390_TLS_LOAD:
2919 case R_390_TLS_GDCALL:
2920 case R_390_TLS_LDCALL:
2921 tls_type = GOT_UNKNOWN;
2922 if (h == NULL && local_got_offsets)
2923 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2924 else if (h != NULL)
2925 tls_type = elf_s390_hash_entry(h)->tls_type;
2926
2927 if (tls_type == GOT_TLS_GD)
2928 continue;
2929
2930 if (r_type == R_390_TLS_LOAD)
2931 {
2932 if (!info->shared && (h == NULL || h->dynindx == -1))
2933 {
2934 /* IE->LE transition. Four valid cases:
2935 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2936 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2937 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2938 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2939 unsigned int insn0, insn1, ry;
2940
2941 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2942 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2943 if (insn1 != 0x0004)
2944 invalid_tls_insn (input_bfd, input_section, rel);
2945 ry = 0;
2946 if ((insn0 & 0xff00f000) == 0xe3000000)
2947 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2948 ry = (insn0 & 0x000f0000);
2949 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2950 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2951 ry = (insn0 & 0x0000f000) << 4;
2952 else if ((insn0 & 0xff00f000) == 0xe300c000)
2953 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2954 ry = (insn0 & 0x000f0000);
2955 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2956 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2957 ry = (insn0 & 0x0000f000) << 4;
2958 else
2959 invalid_tls_insn (input_bfd, input_section, rel);
2960 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2961 insn1 = 0x000d;
2962 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2963 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2964 }
2965 }
2966 else if (r_type == R_390_TLS_GDCALL)
2967 {
2968 unsigned int insn0, insn1;
2969
2970 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2971 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2972 if ((insn0 & 0xffff0000) != 0xc0e50000)
2973 invalid_tls_insn (input_bfd, input_section, rel);
2974 if (!info->shared && (h == NULL || h->dynindx == -1))
2975 {
2976 /* GD->LE transition.
2977 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2978 insn0 = 0xc0040000;
2979 insn1 = 0x0000;
2980 }
2981 else
2982 {
2983 /* GD->IE transition.
2984 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2985 insn0 = 0xe322c000;
2986 insn1 = 0x0004;
2987 }
2988 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2989 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2990 }
2991 else if (r_type == R_390_TLS_LDCALL)
2992 {
2993 if (!info->shared)
2994 {
2995 unsigned int insn0, insn1;
2996
2997 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2998 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2999 if ((insn0 & 0xffff0000) != 0xc0e50000)
3000 invalid_tls_insn (input_bfd, input_section, rel);
3001 /* LD->LE transition.
3002 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3003 insn0 = 0xc0040000;
3004 insn1 = 0x0000;
3005 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3006 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3007 }
3008 }
3009 continue;
3010
3011 default:
3012 break;
3013 }
3014
3015 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3016 because such sections are not SEC_ALLOC and thus ld.so will
3017 not process them. */
3018 if (unresolved_reloc
3019 && !((input_section->flags & SEC_DEBUGGING) != 0
3020 && h->def_dynamic))
3021 (*_bfd_error_handler)
3022 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3023 input_bfd,
3024 input_section,
3025 (long) rel->r_offset,
3026 howto->name,
3027 h->root.root.string);
3028
3029 if (r_type == R_390_20
3030 || r_type == R_390_GOT20
3031 || r_type == R_390_GOTPLT20
3032 || r_type == R_390_TLS_GOTIE20)
3033 {
3034 relocation += rel->r_addend;
3035 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3036 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3037 contents, rel->r_offset,
3038 relocation, 0);
3039 }
3040 else
3041 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3042 contents, rel->r_offset,
3043 relocation, rel->r_addend);
3044
3045 if (r != bfd_reloc_ok)
3046 {
3047 const char *name;
3048
3049 if (h != NULL)
3050 name = h->root.root.string;
3051 else
3052 {
3053 name = bfd_elf_string_from_elf_section (input_bfd,
3054 symtab_hdr->sh_link,
3055 sym->st_name);
3056 if (name == NULL)
3057 return FALSE;
3058 if (*name == '\0')
3059 name = bfd_section_name (input_bfd, sec);
3060 }
3061
3062 if (r == bfd_reloc_overflow)
3063 {
3064
3065 if (! ((*info->callbacks->reloc_overflow)
3066 (info, (h ? &h->root : NULL), name, howto->name,
3067 (bfd_vma) 0, input_bfd, input_section,
3068 rel->r_offset)))
3069 return FALSE;
3070 }
3071 else
3072 {
3073 (*_bfd_error_handler)
3074 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3075 input_bfd, input_section,
3076 (long) rel->r_offset, name, (int) r);
3077 return FALSE;
3078 }
3079 }
3080 }
3081
3082 return TRUE;
3083 }
3084
3085 /* Finish up dynamic symbol handling. We set the contents of various
3086 dynamic sections here. */
3087
3088 static bfd_boolean
3089 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3090 bfd *output_bfd;
3091 struct bfd_link_info *info;
3092 struct elf_link_hash_entry *h;
3093 Elf_Internal_Sym *sym;
3094 {
3095 struct elf_s390_link_hash_table *htab;
3096
3097 htab = elf_s390_hash_table (info);
3098
3099 if (h->plt.offset != (bfd_vma) -1)
3100 {
3101 bfd_vma plt_index;
3102 bfd_vma got_offset;
3103 Elf_Internal_Rela rela;
3104 bfd_byte *loc;
3105
3106 /* This symbol has an entry in the procedure linkage table. Set
3107 it up. */
3108
3109 if (h->dynindx == -1
3110 || htab->splt == NULL
3111 || htab->sgotplt == NULL
3112 || htab->srelplt == NULL)
3113 abort ();
3114
3115 /* Calc. index no.
3116 Current offset - size first entry / entry size. */
3117 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3118
3119 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3120 addr & GOT addr. */
3121 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3122
3123 /* Fill in the blueprint of a PLT. */
3124 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3125 htab->splt->contents + h->plt.offset);
3126 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3127 htab->splt->contents + h->plt.offset + 4);
3128 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3129 htab->splt->contents + h->plt.offset + 8);
3130 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3131 htab->splt->contents + h->plt.offset + 12);
3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3133 htab->splt->contents + h->plt.offset + 16);
3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3135 htab->splt->contents + h->plt.offset + 20);
3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3137 htab->splt->contents + h->plt.offset + 24);
3138 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3139 htab->splt->contents + h->plt.offset + 28);
3140 /* Fixup the relative address to the GOT entry */
3141 bfd_put_32 (output_bfd,
3142 (htab->sgotplt->output_section->vma +
3143 htab->sgotplt->output_offset + got_offset
3144 - (htab->splt->output_section->vma + h->plt.offset))/2,
3145 htab->splt->contents + h->plt.offset + 2);
3146 /* Fixup the relative branch to PLT 0 */
3147 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3148 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3149 htab->splt->contents + h->plt.offset + 24);
3150 /* Fixup offset into symbol table */
3151 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3152 htab->splt->contents + h->plt.offset + 28);
3153
3154 /* Fill in the entry in the global offset table.
3155 Points to instruction after GOT offset. */
3156 bfd_put_64 (output_bfd,
3157 (htab->splt->output_section->vma
3158 + htab->splt->output_offset
3159 + h->plt.offset
3160 + 14),
3161 htab->sgotplt->contents + got_offset);
3162
3163 /* Fill in the entry in the .rela.plt section. */
3164 rela.r_offset = (htab->sgotplt->output_section->vma
3165 + htab->sgotplt->output_offset
3166 + got_offset);
3167 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3168 rela.r_addend = 0;
3169 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3170 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3171
3172 if (!h->def_regular)
3173 {
3174 /* Mark the symbol as undefined, rather than as defined in
3175 the .plt section. Leave the value alone. This is a clue
3176 for the dynamic linker, to make function pointer
3177 comparisons work between an application and shared
3178 library. */
3179 sym->st_shndx = SHN_UNDEF;
3180 }
3181 }
3182
3183 if (h->got.offset != (bfd_vma) -1
3184 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3185 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3186 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3187 {
3188 Elf_Internal_Rela rela;
3189 bfd_byte *loc;
3190
3191 /* This symbol has an entry in the global offset table. Set it
3192 up. */
3193 if (htab->sgot == NULL || htab->srelgot == NULL)
3194 abort ();
3195
3196 rela.r_offset = (htab->sgot->output_section->vma
3197 + htab->sgot->output_offset
3198 + (h->got.offset &~ (bfd_vma) 1));
3199
3200 /* If this is a static link, or it is a -Bsymbolic link and the
3201 symbol is defined locally or was forced to be local because
3202 of a version file, we just want to emit a RELATIVE reloc.
3203 The entry in the global offset table will already have been
3204 initialized in the relocate_section function. */
3205 if (info->shared
3206 && (info->symbolic
3207 || h->dynindx == -1
3208 || h->forced_local)
3209 && h->def_regular)
3210 {
3211 BFD_ASSERT((h->got.offset & 1) != 0);
3212 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3213 rela.r_addend = (h->root.u.def.value
3214 + h->root.u.def.section->output_section->vma
3215 + h->root.u.def.section->output_offset);
3216 }
3217 else
3218 {
3219 BFD_ASSERT((h->got.offset & 1) == 0);
3220 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3221 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3222 rela.r_addend = 0;
3223 }
3224
3225 loc = htab->srelgot->contents;
3226 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3227 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3228 }
3229
3230 if (h->needs_copy)
3231 {
3232 Elf_Internal_Rela rela;
3233 bfd_byte *loc;
3234
3235 /* This symbols needs a copy reloc. Set it up. */
3236
3237 if (h->dynindx == -1
3238 || (h->root.type != bfd_link_hash_defined
3239 && h->root.type != bfd_link_hash_defweak)
3240 || htab->srelbss == NULL)
3241 abort ();
3242
3243 rela.r_offset = (h->root.u.def.value
3244 + h->root.u.def.section->output_section->vma
3245 + h->root.u.def.section->output_offset);
3246 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3247 rela.r_addend = 0;
3248 loc = htab->srelbss->contents;
3249 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3250 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3251 }
3252
3253 /* Mark some specially defined symbols as absolute. */
3254 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3255 || h == htab->elf.hgot
3256 || h == htab->elf.hplt)
3257 sym->st_shndx = SHN_ABS;
3258
3259 return TRUE;
3260 }
3261
3262 /* Used to decide how to sort relocs in an optimal manner for the
3263 dynamic linker, before writing them out. */
3264
3265 static enum elf_reloc_type_class
3266 elf_s390_reloc_type_class (rela)
3267 const Elf_Internal_Rela *rela;
3268 {
3269 switch ((int) ELF64_R_TYPE (rela->r_info))
3270 {
3271 case R_390_RELATIVE:
3272 return reloc_class_relative;
3273 case R_390_JMP_SLOT:
3274 return reloc_class_plt;
3275 case R_390_COPY:
3276 return reloc_class_copy;
3277 default:
3278 return reloc_class_normal;
3279 }
3280 }
3281
3282 /* Finish up the dynamic sections. */
3283
3284 static bfd_boolean
3285 elf_s390_finish_dynamic_sections (output_bfd, info)
3286 bfd *output_bfd;
3287 struct bfd_link_info *info;
3288 {
3289 struct elf_s390_link_hash_table *htab;
3290 bfd *dynobj;
3291 asection *sdyn;
3292
3293 htab = elf_s390_hash_table (info);
3294 dynobj = htab->elf.dynobj;
3295 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3296
3297 if (htab->elf.dynamic_sections_created)
3298 {
3299 Elf64_External_Dyn *dyncon, *dynconend;
3300
3301 if (sdyn == NULL || htab->sgot == NULL)
3302 abort ();
3303
3304 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3305 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3306 for (; dyncon < dynconend; dyncon++)
3307 {
3308 Elf_Internal_Dyn dyn;
3309 asection *s;
3310
3311 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3312
3313 switch (dyn.d_tag)
3314 {
3315 default:
3316 continue;
3317
3318 case DT_PLTGOT:
3319 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3320 break;
3321
3322 case DT_JMPREL:
3323 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3324 break;
3325
3326 case DT_PLTRELSZ:
3327 s = htab->srelplt->output_section;
3328 dyn.d_un.d_val = s->size;
3329 break;
3330
3331 case DT_RELASZ:
3332 /* The procedure linkage table relocs (DT_JMPREL) should
3333 not be included in the overall relocs (DT_RELA).
3334 Therefore, we override the DT_RELASZ entry here to
3335 make it not include the JMPREL relocs. Since the
3336 linker script arranges for .rela.plt to follow all
3337 other relocation sections, we don't have to worry
3338 about changing the DT_RELA entry. */
3339 s = htab->srelplt->output_section;
3340 dyn.d_un.d_val -= s->size;
3341 break;
3342 }
3343
3344 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3345 }
3346
3347 /* Fill in the special first entry in the procedure linkage table. */
3348 if (htab->splt && htab->splt->size > 0)
3349 {
3350 /* fill in blueprint for plt 0 entry */
3351 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3352 htab->splt->contents );
3353 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3354 htab->splt->contents +4 );
3355 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3356 htab->splt->contents +12 );
3357 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3358 htab->splt->contents +16 );
3359 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3360 htab->splt->contents +20 );
3361 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3362 htab->splt->contents + 24);
3363 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3364 htab->splt->contents + 28 );
3365 /* Fixup relative address to start of GOT */
3366 bfd_put_32 (output_bfd,
3367 (htab->sgotplt->output_section->vma +
3368 htab->sgotplt->output_offset
3369 - htab->splt->output_section->vma - 6)/2,
3370 htab->splt->contents + 8);
3371 }
3372 elf_section_data (htab->splt->output_section)
3373 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3374 }
3375
3376 if (htab->sgotplt)
3377 {
3378 /* Fill in the first three entries in the global offset table. */
3379 if (htab->sgotplt->size > 0)
3380 {
3381 bfd_put_64 (output_bfd,
3382 (sdyn == NULL ? (bfd_vma) 0
3383 : sdyn->output_section->vma + sdyn->output_offset),
3384 htab->sgotplt->contents);
3385 /* One entry for shared object struct ptr. */
3386 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3387 /* One entry for _dl_runtime_resolve. */
3388 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3389 }
3390
3391 elf_section_data (htab->sgot->output_section)
3392 ->this_hdr.sh_entsize = 8;
3393 }
3394 return TRUE;
3395 }
3396
3397 /* Return address for Ith PLT stub in section PLT, for relocation REL
3398 or (bfd_vma) -1 if it should not be included. */
3399
3400 static bfd_vma
3401 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3402 const arelent *rel ATTRIBUTE_UNUSED)
3403 {
3404 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3405 }
3406
3407
3408 /* Why was the hash table entry size definition changed from
3409 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3410 this is the only reason for the s390_elf64_size_info structure. */
3411
3412 const struct elf_size_info s390_elf64_size_info =
3413 {
3414 sizeof (Elf64_External_Ehdr),
3415 sizeof (Elf64_External_Phdr),
3416 sizeof (Elf64_External_Shdr),
3417 sizeof (Elf64_External_Rel),
3418 sizeof (Elf64_External_Rela),
3419 sizeof (Elf64_External_Sym),
3420 sizeof (Elf64_External_Dyn),
3421 sizeof (Elf_External_Note),
3422 8, /* hash-table entry size. */
3423 1, /* internal relocations per external relocations. */
3424 64, /* arch_size. */
3425 3, /* log_file_align. */
3426 ELFCLASS64, EV_CURRENT,
3427 bfd_elf64_write_out_phdrs,
3428 bfd_elf64_write_shdrs_and_ehdr,
3429 bfd_elf64_write_relocs,
3430 bfd_elf64_swap_symbol_in,
3431 bfd_elf64_swap_symbol_out,
3432 bfd_elf64_slurp_reloc_table,
3433 bfd_elf64_slurp_symbol_table,
3434 bfd_elf64_swap_dyn_in,
3435 bfd_elf64_swap_dyn_out,
3436 bfd_elf64_swap_reloc_in,
3437 bfd_elf64_swap_reloc_out,
3438 bfd_elf64_swap_reloca_in,
3439 bfd_elf64_swap_reloca_out
3440 };
3441
3442 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3443 #define TARGET_BIG_NAME "elf64-s390"
3444 #define ELF_ARCH bfd_arch_s390
3445 #define ELF_MACHINE_CODE EM_S390
3446 #define ELF_MACHINE_ALT1 EM_S390_OLD
3447 #define ELF_MAXPAGESIZE 0x1000
3448
3449 #define elf_backend_size_info s390_elf64_size_info
3450
3451 #define elf_backend_can_gc_sections 1
3452 #define elf_backend_can_refcount 1
3453 #define elf_backend_want_got_plt 1
3454 #define elf_backend_plt_readonly 1
3455 #define elf_backend_want_plt_sym 0
3456 #define elf_backend_got_header_size 24
3457 #define elf_backend_rela_normal 1
3458
3459 #define elf_info_to_howto elf_s390_info_to_howto
3460
3461 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3462 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3463 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3464
3465 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3466 #define elf_backend_check_relocs elf_s390_check_relocs
3467 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3468 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3469 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3470 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3471 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3472 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3473 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3474 #define elf_backend_relocate_section elf_s390_relocate_section
3475 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3476 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3477 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3478
3479 #define bfd_elf64_mkobject elf_s390_mkobject
3480 #define elf_backend_object_p elf_s390_object_p
3481
3482 #include "elf64-target.h"
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