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2009-06-18 Dave Korn <dave.korn.cygwin@gmail.com>
[binutils.git] / bfd / elf64-s390.c
blobc9bd764a44fbbb468b2599dd838001adb8fe41ce
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 struct elf_s390_link_hash_entry;
50 static void elf_s390_adjust_gotplt
51 PARAMS ((struct elf_s390_link_hash_entry *));
52 static bfd_boolean elf_s390_adjust_dynamic_symbol
53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
54 static bfd_boolean allocate_dynrelocs
55 PARAMS ((struct elf_link_hash_entry *, PTR));
56 static bfd_boolean readonly_dynrelocs
57 PARAMS ((struct elf_link_hash_entry *, PTR));
58 static bfd_boolean elf_s390_size_dynamic_sections
59 PARAMS ((bfd *, struct bfd_link_info *));
60 static bfd_boolean elf_s390_relocate_section
61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
63 static bfd_boolean elf_s390_finish_dynamic_symbol
64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
65 Elf_Internal_Sym *));
66 static enum elf_reloc_type_class elf_s390_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
68 static bfd_boolean elf_s390_finish_dynamic_sections
69 PARAMS ((bfd *, struct bfd_link_info *));
70 static bfd_boolean elf_s390_object_p
71 PARAMS ((bfd *));
72 static int elf_s390_tls_transition
73 PARAMS ((struct bfd_link_info *, int, int));
74 static bfd_reloc_status_type s390_tls_reloc
75 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
76 static bfd_vma dtpoff_base
77 PARAMS ((struct bfd_link_info *));
78 static bfd_vma tpoff
79 PARAMS ((struct bfd_link_info *, bfd_vma));
80 static void invalid_tls_insn
81 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
82 static bfd_reloc_status_type s390_elf_ldisp_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
84
85 #include "elf/s390.h"
86
87 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
88 from smaller values. Start with zero, widen, *then* decrement. */
89 #define MINUS_ONE (((bfd_vma)0) - 1)
90
91 /* The relocation "howto" table. */
92 static reloc_howto_type elf_howto_table[] =
93 {
94 HOWTO (R_390_NONE, /* type */
95 0, /* rightshift */
96 0, /* size (0 = byte, 1 = short, 2 = long) */
97 0, /* bitsize */
98 FALSE, /* pc_relative */
99 0, /* bitpos */
100 complain_overflow_dont, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_390_NONE", /* name */
103 FALSE, /* partial_inplace */
104 0, /* src_mask */
105 0, /* dst_mask */
106 FALSE), /* pcrel_offset */
107
108 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
110 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
111 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
112 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
114 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
116 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
118 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
120 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
122 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
124 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
126 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
128 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
132 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
134 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
136 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
138 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
140 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
142 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
144 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
146 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
148 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
150 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
152 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
154 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
156 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
158 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
160 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
162 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
164 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
165 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
166 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
168 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
170 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
178 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
180 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
185 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
186 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
187 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
188 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
189 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
192 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
194 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
195 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
197 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
198 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
199 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
200 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
202 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
203 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
205 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
206 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
208 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
214 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
220 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
221 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
222 };
223
224 /* GNU extension to record C++ vtable hierarchy. */
225 static reloc_howto_type elf64_s390_vtinherit_howto =
226 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
227 static reloc_howto_type elf64_s390_vtentry_howto =
228 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);
229
230 static reloc_howto_type *
231 elf_s390_reloc_type_lookup (abfd, code)
232 bfd *abfd ATTRIBUTE_UNUSED;
233 bfd_reloc_code_real_type code;
234 {
235 switch (code)
236 {
237 case BFD_RELOC_NONE:
238 return &elf_howto_table[(int) R_390_NONE];
239 case BFD_RELOC_8:
240 return &elf_howto_table[(int) R_390_8];
241 case BFD_RELOC_390_12:
242 return &elf_howto_table[(int) R_390_12];
243 case BFD_RELOC_16:
244 return &elf_howto_table[(int) R_390_16];
245 case BFD_RELOC_32:
246 return &elf_howto_table[(int) R_390_32];
247 case BFD_RELOC_CTOR:
248 return &elf_howto_table[(int) R_390_32];
249 case BFD_RELOC_32_PCREL:
250 return &elf_howto_table[(int) R_390_PC32];
251 case BFD_RELOC_390_GOT12:
252 return &elf_howto_table[(int) R_390_GOT12];
253 case BFD_RELOC_32_GOT_PCREL:
254 return &elf_howto_table[(int) R_390_GOT32];
255 case BFD_RELOC_390_PLT32:
256 return &elf_howto_table[(int) R_390_PLT32];
257 case BFD_RELOC_390_COPY:
258 return &elf_howto_table[(int) R_390_COPY];
259 case BFD_RELOC_390_GLOB_DAT:
260 return &elf_howto_table[(int) R_390_GLOB_DAT];
261 case BFD_RELOC_390_JMP_SLOT:
262 return &elf_howto_table[(int) R_390_JMP_SLOT];
263 case BFD_RELOC_390_RELATIVE:
264 return &elf_howto_table[(int) R_390_RELATIVE];
265 case BFD_RELOC_32_GOTOFF:
266 return &elf_howto_table[(int) R_390_GOTOFF32];
267 case BFD_RELOC_390_GOTPC:
268 return &elf_howto_table[(int) R_390_GOTPC];
269 case BFD_RELOC_390_GOT16:
270 return &elf_howto_table[(int) R_390_GOT16];
271 case BFD_RELOC_16_PCREL:
272 return &elf_howto_table[(int) R_390_PC16];
273 case BFD_RELOC_390_PC16DBL:
274 return &elf_howto_table[(int) R_390_PC16DBL];
275 case BFD_RELOC_390_PLT16DBL:
276 return &elf_howto_table[(int) R_390_PLT16DBL];
277 case BFD_RELOC_390_PC32DBL:
278 return &elf_howto_table[(int) R_390_PC32DBL];
279 case BFD_RELOC_390_PLT32DBL:
280 return &elf_howto_table[(int) R_390_PLT32DBL];
281 case BFD_RELOC_390_GOTPCDBL:
282 return &elf_howto_table[(int) R_390_GOTPCDBL];
283 case BFD_RELOC_64:
284 return &elf_howto_table[(int) R_390_64];
285 case BFD_RELOC_64_PCREL:
286 return &elf_howto_table[(int) R_390_PC64];
287 case BFD_RELOC_390_GOT64:
288 return &elf_howto_table[(int) R_390_GOT64];
289 case BFD_RELOC_390_PLT64:
290 return &elf_howto_table[(int) R_390_PLT64];
291 case BFD_RELOC_390_GOTENT:
292 return &elf_howto_table[(int) R_390_GOTENT];
293 case BFD_RELOC_16_GOTOFF:
294 return &elf_howto_table[(int) R_390_GOTOFF16];
295 case BFD_RELOC_390_GOTOFF64:
296 return &elf_howto_table[(int) R_390_GOTOFF64];
297 case BFD_RELOC_390_GOTPLT12:
298 return &elf_howto_table[(int) R_390_GOTPLT12];
299 case BFD_RELOC_390_GOTPLT16:
300 return &elf_howto_table[(int) R_390_GOTPLT16];
301 case BFD_RELOC_390_GOTPLT32:
302 return &elf_howto_table[(int) R_390_GOTPLT32];
303 case BFD_RELOC_390_GOTPLT64:
304 return &elf_howto_table[(int) R_390_GOTPLT64];
305 case BFD_RELOC_390_GOTPLTENT:
306 return &elf_howto_table[(int) R_390_GOTPLTENT];
307 case BFD_RELOC_390_PLTOFF16:
308 return &elf_howto_table[(int) R_390_PLTOFF16];
309 case BFD_RELOC_390_PLTOFF32:
310 return &elf_howto_table[(int) R_390_PLTOFF32];
311 case BFD_RELOC_390_PLTOFF64:
312 return &elf_howto_table[(int) R_390_PLTOFF64];
313 case BFD_RELOC_390_TLS_LOAD:
314 return &elf_howto_table[(int) R_390_TLS_LOAD];
315 case BFD_RELOC_390_TLS_GDCALL:
316 return &elf_howto_table[(int) R_390_TLS_GDCALL];
317 case BFD_RELOC_390_TLS_LDCALL:
318 return &elf_howto_table[(int) R_390_TLS_LDCALL];
319 case BFD_RELOC_390_TLS_GD64:
320 return &elf_howto_table[(int) R_390_TLS_GD64];
321 case BFD_RELOC_390_TLS_GOTIE12:
322 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
323 case BFD_RELOC_390_TLS_GOTIE64:
324 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
325 case BFD_RELOC_390_TLS_LDM64:
326 return &elf_howto_table[(int) R_390_TLS_LDM64];
327 case BFD_RELOC_390_TLS_IE64:
328 return &elf_howto_table[(int) R_390_TLS_IE64];
329 case BFD_RELOC_390_TLS_IEENT:
330 return &elf_howto_table[(int) R_390_TLS_IEENT];
331 case BFD_RELOC_390_TLS_LE64:
332 return &elf_howto_table[(int) R_390_TLS_LE64];
333 case BFD_RELOC_390_TLS_LDO64:
334 return &elf_howto_table[(int) R_390_TLS_LDO64];
335 case BFD_RELOC_390_TLS_DTPMOD:
336 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
337 case BFD_RELOC_390_TLS_DTPOFF:
338 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
339 case BFD_RELOC_390_TLS_TPOFF:
340 return &elf_howto_table[(int) R_390_TLS_TPOFF];
341 case BFD_RELOC_390_20:
342 return &elf_howto_table[(int) R_390_20];
343 case BFD_RELOC_390_GOT20:
344 return &elf_howto_table[(int) R_390_GOT20];
345 case BFD_RELOC_390_GOTPLT20:
346 return &elf_howto_table[(int) R_390_GOTPLT20];
347 case BFD_RELOC_390_TLS_GOTIE20:
348 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
349 case BFD_RELOC_VTABLE_INHERIT:
350 return &elf64_s390_vtinherit_howto;
351 case BFD_RELOC_VTABLE_ENTRY:
352 return &elf64_s390_vtentry_howto;
353 default:
354 break;
355 }
356 return 0;
357 }
358
359 static reloc_howto_type *
360 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
361 const char *r_name)
362 {
363 unsigned int i;
364
365 for (i = 0;
366 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
367 i++)
368 if (elf_howto_table[i].name != NULL
369 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
370 return &elf_howto_table[i];
371
372 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
373 return &elf64_s390_vtinherit_howto;
374 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
375 return &elf64_s390_vtentry_howto;
376
377 return NULL;
378 }
379
380 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
381 and elf64-s390.c has its own copy. */
382
383 static void
384 elf_s390_info_to_howto (abfd, cache_ptr, dst)
385 bfd *abfd ATTRIBUTE_UNUSED;
386 arelent *cache_ptr;
387 Elf_Internal_Rela *dst;
388 {
389 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
390 switch (r_type)
391 {
392 case R_390_GNU_VTINHERIT:
393 cache_ptr->howto = &elf64_s390_vtinherit_howto;
394 break;
395
396 case R_390_GNU_VTENTRY:
397 cache_ptr->howto = &elf64_s390_vtentry_howto;
398 break;
399
400 default:
401 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
402 {
403 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
404 abfd, (int) r_type);
405 r_type = R_390_NONE;
406 }
407 cache_ptr->howto = &elf_howto_table[r_type];
408 }
409 }
410
411 /* A relocation function which doesn't do anything. */
412 static bfd_reloc_status_type
413 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
414 output_bfd, error_message)
415 bfd *abfd ATTRIBUTE_UNUSED;
416 arelent *reloc_entry;
417 asymbol *symbol ATTRIBUTE_UNUSED;
418 PTR data ATTRIBUTE_UNUSED;
419 asection *input_section;
420 bfd *output_bfd;
421 char **error_message ATTRIBUTE_UNUSED;
422 {
423 if (output_bfd)
424 reloc_entry->address += input_section->output_offset;
425 return bfd_reloc_ok;
426 }
427
428 /* Handle the large displacement relocs. */
429 static bfd_reloc_status_type
430 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
431 output_bfd, error_message)
432 bfd *abfd;
433 arelent *reloc_entry;
434 asymbol *symbol;
435 PTR data;
436 asection *input_section;
437 bfd *output_bfd;
438 char **error_message ATTRIBUTE_UNUSED;
439 {
440 reloc_howto_type *howto = reloc_entry->howto;
441 bfd_vma relocation;
442 bfd_vma insn;
443
444 if (output_bfd != (bfd *) NULL
445 && (symbol->flags & BSF_SECTION_SYM) == 0
446 && (! howto->partial_inplace
447 || reloc_entry->addend == 0))
448 {
449 reloc_entry->address += input_section->output_offset;
450 return bfd_reloc_ok;
451 }
452 if (output_bfd != NULL)
453 return bfd_reloc_continue;
454
455 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
456 return bfd_reloc_outofrange;
457
458 relocation = (symbol->value
459 + symbol->section->output_section->vma
460 + symbol->section->output_offset);
461 relocation += reloc_entry->addend;
462 if (howto->pc_relative)
463 {
464 relocation -= (input_section->output_section->vma
465 + input_section->output_offset);
466 relocation -= reloc_entry->address;
467 }
468
469 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
470 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
471 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
472
473 if ((bfd_signed_vma) relocation < - 0x80000
474 || (bfd_signed_vma) relocation > 0x7ffff)
475 return bfd_reloc_overflow;
476 else
477 return bfd_reloc_ok;
478 }
479
480 static bfd_boolean
481 elf_s390_is_local_label_name (abfd, name)
482 bfd *abfd;
483 const char *name;
484 {
485 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
486 return TRUE;
487
488 return _bfd_elf_is_local_label_name (abfd, name);
489 }
490
491 /* Functions for the 390 ELF linker. */
492
493 /* The name of the dynamic interpreter. This is put in the .interp
494 section. */
495
496 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
497
498 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
499 copying dynamic variables from a shared lib into an app's dynbss
500 section, and instead use a dynamic relocation to point into the
501 shared lib. */
502 #define ELIMINATE_COPY_RELOCS 1
503
504 /* The size in bytes of the first entry in the procedure linkage table. */
505 #define PLT_FIRST_ENTRY_SIZE 32
506 /* The size in bytes of an entry in the procedure linkage table. */
507 #define PLT_ENTRY_SIZE 32
508
509 #define GOT_ENTRY_SIZE 8
510
511 /* The first three entries in a procedure linkage table are reserved,
512 and the initial contents are unimportant (we zero them out).
513 Subsequent entries look like this. See the SVR4 ABI 386
514 supplement to see how this works. */
515
516 /* For the s390, simple addr offset can only be 0 - 4096.
517 To use the full 16777216 TB address space, several instructions
518 are needed to load an address in a register and execute
519 a branch( or just saving the address)
520
521 Furthermore, only r 0 and 1 are free to use!!! */
522
523 /* The first 3 words in the GOT are then reserved.
524 Word 0 is the address of the dynamic table.
525 Word 1 is a pointer to a structure describing the object
526 Word 2 is used to point to the loader entry address.
527
528 The code for PLT entries looks like this:
529
530 The GOT holds the address in the PLT to be executed.
531 The loader then gets:
532 24(15) = Pointer to the structure describing the object.
533 28(15) = Offset in symbol table
534 The loader must then find the module where the function is
535 and insert the address in the GOT.
536
537 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
538 LG 1,0(1) # 6 bytes Load address from GOT in r1
539 BCR 15,1 # 2 bytes Jump to address
540 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
541 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
542 BRCL 15,-x # 6 bytes Jump to start of PLT
543 .long ? # 4 bytes offset into symbol table
544
545 Total = 32 bytes per PLT entry
546 Fixup at offset 2: relative address to GOT entry
547 Fixup at offset 22: relative branch to PLT0
548 Fixup at offset 28: 32 bit offset into symbol table
549
550 A 32 bit offset into the symbol table is enough. It allows for symbol
551 tables up to a size of 2 gigabyte. A single dynamic object (the main
552 program, any shared library) is limited to 4GB in size and I want to see
553 the program that manages to have a symbol table of more than 2 GB with a
554 total size of at max 4 GB. */
555
556 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
557 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
558 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
559 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
560 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
561 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
562 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
563 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
564
565 /* The first PLT entry pushes the offset into the symbol table
566 from R1 onto the stack at 8(15) and the loader object info
567 at 12(15), loads the loader address in R1 and jumps to it. */
568
569 /* The first entry in the PLT:
570
571 PLT0:
572 STG 1,56(15) # r1 contains the offset into the symbol table
573 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
574 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
575 LG 1,16(1) # get entry address of loader
576 BCR 15,1 # jump to loader
577
578 Fixup at offset 8: relative address to start of GOT. */
579
580 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
581 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
582 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
583 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
584 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
585 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
586 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
587 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
588
589 /* The s390 linker needs to keep track of the number of relocs that it
590 decides to copy as dynamic relocs in check_relocs for each symbol.
591 This is so that it can later discard them if they are found to be
592 unnecessary. We store the information in a field extending the
593 regular ELF linker hash table. */
594
595 struct elf_s390_dyn_relocs
596 {
597 struct elf_s390_dyn_relocs *next;
598
599 /* The input section of the reloc. */
600 asection *sec;
601
602 /* Total number of relocs copied for the input section. */
603 bfd_size_type count;
604
605 /* Number of pc-relative relocs copied for the input section. */
606 bfd_size_type pc_count;
607 };
608
609 /* s390 ELF linker hash entry. */
610
611 struct elf_s390_link_hash_entry
612 {
613 struct elf_link_hash_entry elf;
614
615 /* Track dynamic relocs copied for this symbol. */
616 struct elf_s390_dyn_relocs *dyn_relocs;
617
618 /* Number of GOTPLT references for a function. */
619 bfd_signed_vma gotplt_refcount;
620
621 #define GOT_UNKNOWN 0
622 #define GOT_NORMAL 1
623 #define GOT_TLS_GD 2
624 #define GOT_TLS_IE 3
625 #define GOT_TLS_IE_NLT 3
626 unsigned char tls_type;
627 };
628
629 #define elf_s390_hash_entry(ent) \
630 ((struct elf_s390_link_hash_entry *)(ent))
631
632 /* NOTE: Keep this structure in sync with
633 the one declared in elf32-s390.c. */
634 struct elf_s390_obj_tdata
635 {
636 struct elf_obj_tdata root;
637
638 /* TLS type for each local got entry. */
639 char *local_got_tls_type;
640 };
641
642 #define elf_s390_tdata(abfd) \
643 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
644
645 #define elf_s390_local_got_tls_type(abfd) \
646 (elf_s390_tdata (abfd)->local_got_tls_type)
647
648 #define is_s390_elf(bfd) \
649 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
650 && elf_tdata (bfd) != NULL \
651 && elf_object_id (bfd) == S390_ELF_TDATA)
652
653 static bfd_boolean
654 elf_s390_mkobject (bfd *abfd)
655 {
656 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
657 S390_ELF_TDATA);
658 }
659
660 static bfd_boolean
661 elf_s390_object_p (abfd)
662 bfd *abfd;
663 {
664 /* Set the right machine number for an s390 elf32 file. */
665 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
666 }
667
668 /* s390 ELF linker hash table. */
669
670 struct elf_s390_link_hash_table
671 {
672 struct elf_link_hash_table elf;
673
674 /* Short-cuts to get to dynamic linker sections. */
675 asection *sgot;
676 asection *sgotplt;
677 asection *srelgot;
678 asection *splt;
679 asection *srelplt;
680 asection *sdynbss;
681 asection *srelbss;
682
683 union {
684 bfd_signed_vma refcount;
685 bfd_vma offset;
686 } tls_ldm_got;
687
688 /* Small local sym to section mapping cache. */
689 struct sym_sec_cache sym_sec;
690 };
691
692 /* Get the s390 ELF linker hash table from a link_info structure. */
693
694 #define elf_s390_hash_table(p) \
695 ((struct elf_s390_link_hash_table *) ((p)->hash))
696
697 /* Create an entry in an s390 ELF linker hash table. */
698
699 static struct bfd_hash_entry *
700 link_hash_newfunc (entry, table, string)
701 struct bfd_hash_entry *entry;
702 struct bfd_hash_table *table;
703 const char *string;
704 {
705 /* Allocate the structure if it has not already been allocated by a
706 subclass. */
707 if (entry == NULL)
708 {
709 entry = bfd_hash_allocate (table,
710 sizeof (struct elf_s390_link_hash_entry));
711 if (entry == NULL)
712 return entry;
713 }
714
715 /* Call the allocation method of the superclass. */
716 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
717 if (entry != NULL)
718 {
719 struct elf_s390_link_hash_entry *eh;
720
721 eh = (struct elf_s390_link_hash_entry *) entry;
722 eh->dyn_relocs = NULL;
723 eh->gotplt_refcount = 0;
724 eh->tls_type = GOT_UNKNOWN;
725 }
726
727 return entry;
728 }
729
730 /* Create an s390 ELF linker hash table. */
731
732 static struct bfd_link_hash_table *
733 elf_s390_link_hash_table_create (abfd)
734 bfd *abfd;
735 {
736 struct elf_s390_link_hash_table *ret;
737 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
738
739 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
740 if (ret == NULL)
741 return NULL;
742
743 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
744 sizeof (struct elf_s390_link_hash_entry)))
745 {
746 free (ret);
747 return NULL;
748 }
749
750 ret->sgot = NULL;
751 ret->sgotplt = NULL;
752 ret->srelgot = NULL;
753 ret->splt = NULL;
754 ret->srelplt = NULL;
755 ret->sdynbss = NULL;
756 ret->srelbss = NULL;
757 ret->tls_ldm_got.refcount = 0;
758 ret->sym_sec.abfd = NULL;
759
760 return &ret->elf.root;
761 }
762
763 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
764 shortcuts to them in our hash table. */
765
766 static bfd_boolean
767 create_got_section (dynobj, info)
768 bfd *dynobj;
769 struct bfd_link_info *info;
770 {
771 struct elf_s390_link_hash_table *htab;
772
773 if (! _bfd_elf_create_got_section (dynobj, info))
774 return FALSE;
775
776 htab = elf_s390_hash_table (info);
777 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
778 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
779 htab->srelgot = bfd_get_section_by_name (dynobj, ".rela.got");
780 if (!htab->sgot || !htab->sgotplt || !htab->srelgot)
781 abort ();
782 return TRUE;
783 }
784
785 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
786 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
787 hash table. */
788
789 static bfd_boolean
790 elf_s390_create_dynamic_sections (dynobj, info)
791 bfd *dynobj;
792 struct bfd_link_info *info;
793 {
794 struct elf_s390_link_hash_table *htab;
795
796 htab = elf_s390_hash_table (info);
797 if (!htab->sgot && !create_got_section (dynobj, info))
798 return FALSE;
799
800 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
801 return FALSE;
802
803 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
804 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
805 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
806 if (!info->shared)
807 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
808
809 if (!htab->splt || !htab->srelplt || !htab->sdynbss
810 || (!info->shared && !htab->srelbss))
811 abort ();
812
813 return TRUE;
814 }
815
816 /* Copy the extra info we tack onto an elf_link_hash_entry. */
817
818 static void
819 elf_s390_copy_indirect_symbol (info, dir, ind)
820 struct bfd_link_info *info;
821 struct elf_link_hash_entry *dir, *ind;
822 {
823 struct elf_s390_link_hash_entry *edir, *eind;
824
825 edir = (struct elf_s390_link_hash_entry *) dir;
826 eind = (struct elf_s390_link_hash_entry *) ind;
827
828 if (eind->dyn_relocs != NULL)
829 {
830 if (edir->dyn_relocs != NULL)
831 {
832 struct elf_s390_dyn_relocs **pp;
833 struct elf_s390_dyn_relocs *p;
834
835 /* Add reloc counts against the indirect sym to the direct sym
836 list. Merge any entries against the same section. */
837 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
838 {
839 struct elf_s390_dyn_relocs *q;
840
841 for (q = edir->dyn_relocs; q != NULL; q = q->next)
842 if (q->sec == p->sec)
843 {
844 q->pc_count += p->pc_count;
845 q->count += p->count;
846 *pp = p->next;
847 break;
848 }
849 if (q == NULL)
850 pp = &p->next;
851 }
852 *pp = edir->dyn_relocs;
853 }
854
855 edir->dyn_relocs = eind->dyn_relocs;
856 eind->dyn_relocs = NULL;
857 }
858
859 if (ind->root.type == bfd_link_hash_indirect
860 && dir->got.refcount <= 0)
861 {
862 edir->tls_type = eind->tls_type;
863 eind->tls_type = GOT_UNKNOWN;
864 }
865
866 if (ELIMINATE_COPY_RELOCS
867 && ind->root.type != bfd_link_hash_indirect
868 && dir->dynamic_adjusted)
869 {
870 /* If called to transfer flags for a weakdef during processing
871 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
872 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
873 dir->ref_dynamic |= ind->ref_dynamic;
874 dir->ref_regular |= ind->ref_regular;
875 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
876 dir->needs_plt |= ind->needs_plt;
877 }
878 else
879 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
880 }
881
882 static int
883 elf_s390_tls_transition (info, r_type, is_local)
884 struct bfd_link_info *info;
885 int r_type;
886 int is_local;
887 {
888 if (info->shared)
889 return r_type;
890
891 switch (r_type)
892 {
893 case R_390_TLS_GD64:
894 case R_390_TLS_IE64:
895 if (is_local)
896 return R_390_TLS_LE64;
897 return R_390_TLS_IE64;
898 case R_390_TLS_GOTIE64:
899 if (is_local)
900 return R_390_TLS_LE64;
901 return R_390_TLS_GOTIE64;
902 case R_390_TLS_LDM64:
903 return R_390_TLS_LE64;
904 }
905
906 return r_type;
907 }
908
909 /* Look through the relocs for a section during the first phase, and
910 allocate space in the global offset table or procedure linkage
911 table. */
912
913 static bfd_boolean
914 elf_s390_check_relocs (abfd, info, sec, relocs)
915 bfd *abfd;
916 struct bfd_link_info *info;
917 asection *sec;
918 const Elf_Internal_Rela *relocs;
919 {
920 struct elf_s390_link_hash_table *htab;
921 Elf_Internal_Shdr *symtab_hdr;
922 struct elf_link_hash_entry **sym_hashes;
923 const Elf_Internal_Rela *rel;
924 const Elf_Internal_Rela *rel_end;
925 asection *sreloc;
926 bfd_signed_vma *local_got_refcounts;
927 int tls_type, old_tls_type;
928
929 if (info->relocatable)
930 return TRUE;
931
932 BFD_ASSERT (is_s390_elf (abfd));
933
934 htab = elf_s390_hash_table (info);
935 symtab_hdr = &elf_symtab_hdr (abfd);
936 sym_hashes = elf_sym_hashes (abfd);
937 local_got_refcounts = elf_local_got_refcounts (abfd);
938
939 sreloc = NULL;
940
941 rel_end = relocs + sec->reloc_count;
942 for (rel = relocs; rel < rel_end; rel++)
943 {
944 unsigned int r_type;
945 unsigned long r_symndx;
946 struct elf_link_hash_entry *h;
947
948 r_symndx = ELF64_R_SYM (rel->r_info);
949
950 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
951 {
952 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
953 abfd,
954 r_symndx);
955 return FALSE;
956 }
957
958 if (r_symndx < symtab_hdr->sh_info)
959 h = NULL;
960 else
961 {
962 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
963 while (h->root.type == bfd_link_hash_indirect
964 || h->root.type == bfd_link_hash_warning)
965 h = (struct elf_link_hash_entry *) h->root.u.i.link;
966 }
967
968 /* Create got section and local_got_refcounts array if they
969 are needed. */
970 r_type = elf_s390_tls_transition (info,
971 ELF64_R_TYPE (rel->r_info),
972 h == NULL);
973 switch (r_type)
974 {
975 case R_390_GOT12:
976 case R_390_GOT16:
977 case R_390_GOT20:
978 case R_390_GOT32:
979 case R_390_GOT64:
980 case R_390_GOTENT:
981 case R_390_GOTPLT12:
982 case R_390_GOTPLT16:
983 case R_390_GOTPLT20:
984 case R_390_GOTPLT32:
985 case R_390_GOTPLT64:
986 case R_390_GOTPLTENT:
987 case R_390_TLS_GD64:
988 case R_390_TLS_GOTIE12:
989 case R_390_TLS_GOTIE20:
990 case R_390_TLS_GOTIE64:
991 case R_390_TLS_IEENT:
992 case R_390_TLS_IE64:
993 case R_390_TLS_LDM64:
994 if (h == NULL
995 && local_got_refcounts == NULL)
996 {
997 bfd_size_type size;
998
999 size = symtab_hdr->sh_info;
1000 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1001 local_got_refcounts = ((bfd_signed_vma *)
1002 bfd_zalloc (abfd, size));
1003 if (local_got_refcounts == NULL)
1004 return FALSE;
1005 elf_local_got_refcounts (abfd) = local_got_refcounts;
1006 elf_s390_local_got_tls_type (abfd)
1007 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1008 }
1009 /* Fall through. */
1010 case R_390_GOTOFF16:
1011 case R_390_GOTOFF32:
1012 case R_390_GOTOFF64:
1013 case R_390_GOTPC:
1014 case R_390_GOTPCDBL:
1015 if (htab->sgot == NULL)
1016 {
1017 if (htab->elf.dynobj == NULL)
1018 htab->elf.dynobj = abfd;
1019 if (!create_got_section (htab->elf.dynobj, info))
1020 return FALSE;
1021 }
1022 }
1023
1024 switch (r_type)
1025 {
1026 case R_390_GOTOFF16:
1027 case R_390_GOTOFF32:
1028 case R_390_GOTOFF64:
1029 case R_390_GOTPC:
1030 case R_390_GOTPCDBL:
1031 /* Got is created, nothing to be done. */
1032 break;
1033
1034 case R_390_PLT16DBL:
1035 case R_390_PLT32:
1036 case R_390_PLT32DBL:
1037 case R_390_PLT64:
1038 case R_390_PLTOFF16:
1039 case R_390_PLTOFF32:
1040 case R_390_PLTOFF64:
1041 /* This symbol requires a procedure linkage table entry. We
1042 actually build the entry in adjust_dynamic_symbol,
1043 because this might be a case of linking PIC code which is
1044 never referenced by a dynamic object, in which case we
1045 don't need to generate a procedure linkage table entry
1046 after all. */
1047
1048 /* If this is a local symbol, we resolve it directly without
1049 creating a procedure linkage table entry. */
1050 if (h != NULL)
1051 {
1052 h->needs_plt = 1;
1053 h->plt.refcount += 1;
1054 }
1055 break;
1056
1057 case R_390_GOTPLT12:
1058 case R_390_GOTPLT16:
1059 case R_390_GOTPLT20:
1060 case R_390_GOTPLT32:
1061 case R_390_GOTPLT64:
1062 case R_390_GOTPLTENT:
1063 /* This symbol requires either a procedure linkage table entry
1064 or an entry in the local got. We actually build the entry
1065 in adjust_dynamic_symbol because whether this is really a
1066 global reference can change and with it the fact if we have
1067 to create a plt entry or a local got entry. To be able to
1068 make a once global symbol a local one we have to keep track
1069 of the number of gotplt references that exist for this
1070 symbol. */
1071 if (h != NULL)
1072 {
1073 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1074 h->needs_plt = 1;
1075 h->plt.refcount += 1;
1076 }
1077 else
1078 local_got_refcounts[r_symndx] += 1;
1079 break;
1080
1081 case R_390_TLS_LDM64:
1082 htab->tls_ldm_got.refcount += 1;
1083 break;
1084
1085 case R_390_TLS_IE64:
1086 case R_390_TLS_GOTIE12:
1087 case R_390_TLS_GOTIE20:
1088 case R_390_TLS_GOTIE64:
1089 case R_390_TLS_IEENT:
1090 if (info->shared)
1091 info->flags |= DF_STATIC_TLS;
1092 /* Fall through */
1093
1094 case R_390_GOT12:
1095 case R_390_GOT16:
1096 case R_390_GOT20:
1097 case R_390_GOT32:
1098 case R_390_GOT64:
1099 case R_390_GOTENT:
1100 case R_390_TLS_GD64:
1101 /* This symbol requires a global offset table entry. */
1102 switch (r_type)
1103 {
1104 default:
1105 case R_390_GOT12:
1106 case R_390_GOT16:
1107 case R_390_GOT20:
1108 case R_390_GOT32:
1109 case R_390_GOTENT:
1110 tls_type = GOT_NORMAL;
1111 break;
1112 case R_390_TLS_GD64:
1113 tls_type = GOT_TLS_GD;
1114 break;
1115 case R_390_TLS_IE64:
1116 case R_390_TLS_GOTIE64:
1117 tls_type = GOT_TLS_IE;
1118 break;
1119 case R_390_TLS_GOTIE12:
1120 case R_390_TLS_GOTIE20:
1121 case R_390_TLS_IEENT:
1122 tls_type = GOT_TLS_IE_NLT;
1123 break;
1124 }
1125
1126 if (h != NULL)
1127 {
1128 h->got.refcount += 1;
1129 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1130 }
1131 else
1132 {
1133 local_got_refcounts[r_symndx] += 1;
1134 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1135 }
1136 /* If a TLS symbol is accessed using IE at least once,
1137 there is no point to use dynamic model for it. */
1138 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1139 {
1140 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1141 {
1142 (*_bfd_error_handler)
1143 (_("%B: `%s' accessed both as normal and thread local symbol"),
1144 abfd, h->root.root.string);
1145 return FALSE;
1146 }
1147 if (old_tls_type > tls_type)
1148 tls_type = old_tls_type;
1149 }
1150
1151 if (old_tls_type != tls_type)
1152 {
1153 if (h != NULL)
1154 elf_s390_hash_entry (h)->tls_type = tls_type;
1155 else
1156 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1157 }
1158
1159 if (r_type != R_390_TLS_IE64)
1160 break;
1161 /* Fall through */
1162
1163 case R_390_TLS_LE64:
1164 if (!info->shared)
1165 break;
1166 info->flags |= DF_STATIC_TLS;
1167 /* Fall through */
1168
1169 case R_390_8:
1170 case R_390_16:
1171 case R_390_32:
1172 case R_390_64:
1173 case R_390_PC16:
1174 case R_390_PC16DBL:
1175 case R_390_PC32:
1176 case R_390_PC32DBL:
1177 case R_390_PC64:
1178 if (h != NULL && !info->shared)
1179 {
1180 /* If this reloc is in a read-only section, we might
1181 need a copy reloc. We can't check reliably at this
1182 stage whether the section is read-only, as input
1183 sections have not yet been mapped to output sections.
1184 Tentatively set the flag for now, and correct in
1185 adjust_dynamic_symbol. */
1186 h->non_got_ref = 1;
1187
1188 /* We may need a .plt entry if the function this reloc
1189 refers to is in a shared lib. */
1190 h->plt.refcount += 1;
1191 }
1192
1193 /* If we are creating a shared library, and this is a reloc
1194 against a global symbol, or a non PC relative reloc
1195 against a local symbol, then we need to copy the reloc
1196 into the shared library. However, if we are linking with
1197 -Bsymbolic, we do not need to copy a reloc against a
1198 global symbol which is defined in an object we are
1199 including in the link (i.e., DEF_REGULAR is set). At
1200 this point we have not seen all the input files, so it is
1201 possible that DEF_REGULAR is not set now but will be set
1202 later (it is never cleared). In case of a weak definition,
1203 DEF_REGULAR may be cleared later by a strong definition in
1204 a shared library. We account for that possibility below by
1205 storing information in the relocs_copied field of the hash
1206 table entry. A similar situation occurs when creating
1207 shared libraries and symbol visibility changes render the
1208 symbol local.
1209
1210 If on the other hand, we are creating an executable, we
1211 may need to keep relocations for symbols satisfied by a
1212 dynamic library if we manage to avoid copy relocs for the
1213 symbol. */
1214 if ((info->shared
1215 && (sec->flags & SEC_ALLOC) != 0
1216 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1217 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1218 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1219 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1220 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1221 || (h != NULL
1222 && (! SYMBOLIC_BIND (info, h)
1223 || h->root.type == bfd_link_hash_defweak
1224 || !h->def_regular))))
1225 || (ELIMINATE_COPY_RELOCS
1226 && !info->shared
1227 && (sec->flags & SEC_ALLOC) != 0
1228 && h != NULL
1229 && (h->root.type == bfd_link_hash_defweak
1230 || !h->def_regular)))
1231 {
1232 struct elf_s390_dyn_relocs *p;
1233 struct elf_s390_dyn_relocs **head;
1234
1235 /* We must copy these reloc types into the output file.
1236 Create a reloc section in dynobj and make room for
1237 this reloc. */
1238 if (sreloc == NULL)
1239 {
1240 if (htab->elf.dynobj == NULL)
1241 htab->elf.dynobj = abfd;
1242
1243 sreloc = _bfd_elf_make_dynamic_reloc_section
1244 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1245
1246 if (sreloc == NULL)
1247 return FALSE;
1248 }
1249
1250 /* If this is a global symbol, we count the number of
1251 relocations we need for this symbol. */
1252 if (h != NULL)
1253 {
1254 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1255 }
1256 else
1257 {
1258 /* Track dynamic relocs needed for local syms too.
1259 We really need local syms available to do this
1260 easily. Oh well. */
1261
1262 asection *s;
1263 void *vpp;
1264
1265 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1266 sec, r_symndx);
1267 if (s == NULL)
1268 return FALSE;
1269
1270 vpp = &elf_section_data (s)->local_dynrel;
1271 head = (struct elf_s390_dyn_relocs **) vpp;
1272 }
1273
1274 p = *head;
1275 if (p == NULL || p->sec != sec)
1276 {
1277 bfd_size_type amt = sizeof *p;
1278 p = ((struct elf_s390_dyn_relocs *)
1279 bfd_alloc (htab->elf.dynobj, amt));
1280 if (p == NULL)
1281 return FALSE;
1282 p->next = *head;
1283 *head = p;
1284 p->sec = sec;
1285 p->count = 0;
1286 p->pc_count = 0;
1287 }
1288
1289 p->count += 1;
1290 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1291 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1292 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1293 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1294 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1295 p->pc_count += 1;
1296 }
1297 break;
1298
1299 /* This relocation describes the C++ object vtable hierarchy.
1300 Reconstruct it for later use during GC. */
1301 case R_390_GNU_VTINHERIT:
1302 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1303 return FALSE;
1304 break;
1305
1306 /* This relocation describes which C++ vtable entries are actually
1307 used. Record for later use during GC. */
1308 case R_390_GNU_VTENTRY:
1309 BFD_ASSERT (h != NULL);
1310 if (h != NULL
1311 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1312 return FALSE;
1313 break;
1314
1315 default:
1316 break;
1317 }
1318 }
1319
1320 return TRUE;
1321 }
1322
1323 /* Return the section that should be marked against GC for a given
1324 relocation. */
1325
1326 static asection *
1327 elf_s390_gc_mark_hook (asection *sec,
1328 struct bfd_link_info *info,
1329 Elf_Internal_Rela *rel,
1330 struct elf_link_hash_entry *h,
1331 Elf_Internal_Sym *sym)
1332 {
1333 if (h != NULL)
1334 switch (ELF64_R_TYPE (rel->r_info))
1335 {
1336 case R_390_GNU_VTINHERIT:
1337 case R_390_GNU_VTENTRY:
1338 return NULL;
1339 }
1340
1341 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1342 }
1343
1344 /* Update the got entry reference counts for the section being removed. */
1345
1346 static bfd_boolean
1347 elf_s390_gc_sweep_hook (bfd *abfd,
1348 struct bfd_link_info *info,
1349 asection *sec,
1350 const Elf_Internal_Rela *relocs)
1351 {
1352 Elf_Internal_Shdr *symtab_hdr;
1353 struct elf_link_hash_entry **sym_hashes;
1354 bfd_signed_vma *local_got_refcounts;
1355 const Elf_Internal_Rela *rel, *relend;
1356
1357 if (info->relocatable)
1358 return TRUE;
1359
1360 elf_section_data (sec)->local_dynrel = NULL;
1361
1362 symtab_hdr = &elf_symtab_hdr (abfd);
1363 sym_hashes = elf_sym_hashes (abfd);
1364 local_got_refcounts = elf_local_got_refcounts (abfd);
1365
1366 relend = relocs + sec->reloc_count;
1367 for (rel = relocs; rel < relend; rel++)
1368 {
1369 unsigned long r_symndx;
1370 unsigned int r_type;
1371 struct elf_link_hash_entry *h = NULL;
1372
1373 r_symndx = ELF64_R_SYM (rel->r_info);
1374 if (r_symndx >= symtab_hdr->sh_info)
1375 {
1376 struct elf_s390_link_hash_entry *eh;
1377 struct elf_s390_dyn_relocs **pp;
1378 struct elf_s390_dyn_relocs *p;
1379
1380 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1381 while (h->root.type == bfd_link_hash_indirect
1382 || h->root.type == bfd_link_hash_warning)
1383 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1384 eh = (struct elf_s390_link_hash_entry *) h;
1385
1386 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1387 if (p->sec == sec)
1388 {
1389 /* Everything must go for SEC. */
1390 *pp = p->next;
1391 break;
1392 }
1393 }
1394
1395 r_type = ELF64_R_TYPE (rel->r_info);
1396 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1397 switch (r_type)
1398 {
1399 case R_390_TLS_LDM64:
1400 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1401 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1402 break;
1403
1404 case R_390_TLS_GD64:
1405 case R_390_TLS_IE64:
1406 case R_390_TLS_GOTIE12:
1407 case R_390_TLS_GOTIE20:
1408 case R_390_TLS_GOTIE64:
1409 case R_390_TLS_IEENT:
1410 case R_390_GOT12:
1411 case R_390_GOT16:
1412 case R_390_GOT20:
1413 case R_390_GOT32:
1414 case R_390_GOT64:
1415 case R_390_GOTOFF16:
1416 case R_390_GOTOFF32:
1417 case R_390_GOTOFF64:
1418 case R_390_GOTPC:
1419 case R_390_GOTPCDBL:
1420 case R_390_GOTENT:
1421 if (h != NULL)
1422 {
1423 if (h->got.refcount > 0)
1424 h->got.refcount -= 1;
1425 }
1426 else if (local_got_refcounts != NULL)
1427 {
1428 if (local_got_refcounts[r_symndx] > 0)
1429 local_got_refcounts[r_symndx] -= 1;
1430 }
1431 break;
1432
1433 case R_390_8:
1434 case R_390_12:
1435 case R_390_16:
1436 case R_390_20:
1437 case R_390_32:
1438 case R_390_64:
1439 case R_390_PC16:
1440 case R_390_PC16DBL:
1441 case R_390_PC32:
1442 case R_390_PC32DBL:
1443 case R_390_PC64:
1444 if (info->shared)
1445 break;
1446 /* Fall through */
1447
1448 case R_390_PLT16DBL:
1449 case R_390_PLT32:
1450 case R_390_PLT32DBL:
1451 case R_390_PLT64:
1452 case R_390_PLTOFF16:
1453 case R_390_PLTOFF32:
1454 case R_390_PLTOFF64:
1455 if (h != NULL)
1456 {
1457 if (h->plt.refcount > 0)
1458 h->plt.refcount -= 1;
1459 }
1460 break;
1461
1462 case R_390_GOTPLT12:
1463 case R_390_GOTPLT16:
1464 case R_390_GOTPLT20:
1465 case R_390_GOTPLT32:
1466 case R_390_GOTPLT64:
1467 case R_390_GOTPLTENT:
1468 if (h != NULL)
1469 {
1470 if (h->plt.refcount > 0)
1471 {
1472 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1473 h->plt.refcount -= 1;
1474 }
1475 }
1476 else if (local_got_refcounts != NULL)
1477 {
1478 if (local_got_refcounts[r_symndx] > 0)
1479 local_got_refcounts[r_symndx] -= 1;
1480 }
1481 break;
1482
1483 default:
1484 break;
1485 }
1486 }
1487
1488 return TRUE;
1489 }
1490
1491 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1492 entry but we found we will not create any. Called when we find we will
1493 not have any PLT for this symbol, by for example
1494 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1495 or elf_s390_size_dynamic_sections if no dynamic sections will be
1496 created (we're only linking static objects). */
1497
1498 static void
1499 elf_s390_adjust_gotplt (h)
1500 struct elf_s390_link_hash_entry *h;
1501 {
1502 if (h->elf.root.type == bfd_link_hash_warning)
1503 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1504
1505 if (h->gotplt_refcount <= 0)
1506 return;
1507
1508 /* We simply add the number of gotplt references to the number
1509 * of got references for this symbol. */
1510 h->elf.got.refcount += h->gotplt_refcount;
1511 h->gotplt_refcount = -1;
1512 }
1513
1514 /* Adjust a symbol defined by a dynamic object and referenced by a
1515 regular object. The current definition is in some section of the
1516 dynamic object, but we're not including those sections. We have to
1517 change the definition to something the rest of the link can
1518 understand. */
1519
1520 static bfd_boolean
1521 elf_s390_adjust_dynamic_symbol (info, h)
1522 struct bfd_link_info *info;
1523 struct elf_link_hash_entry *h;
1524 {
1525 struct elf_s390_link_hash_table *htab;
1526 asection *s;
1527
1528 /* If this is a function, put it in the procedure linkage table. We
1529 will fill in the contents of the procedure linkage table later
1530 (although we could actually do it here). */
1531 if (h->type == STT_FUNC
1532 || h->needs_plt)
1533 {
1534 if (h->plt.refcount <= 0
1535 || SYMBOL_CALLS_LOCAL (info, h)
1536 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1537 && h->root.type == bfd_link_hash_undefweak))
1538 {
1539 /* This case can occur if we saw a PLT32 reloc in an input
1540 file, but the symbol was never referred to by a dynamic
1541 object, or if all references were garbage collected. In
1542 such a case, we don't actually need to build a procedure
1543 linkage table, and we can just do a PC32 reloc instead. */
1544 h->plt.offset = (bfd_vma) -1;
1545 h->needs_plt = 0;
1546 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1547 }
1548
1549 return TRUE;
1550 }
1551 else
1552 /* It's possible that we incorrectly decided a .plt reloc was
1553 needed for an R_390_PC32 reloc to a non-function sym in
1554 check_relocs. We can't decide accurately between function and
1555 non-function syms in check-relocs; Objects loaded later in
1556 the link may change h->type. So fix it now. */
1557 h->plt.offset = (bfd_vma) -1;
1558
1559 /* If this is a weak symbol, and there is a real definition, the
1560 processor independent code will have arranged for us to see the
1561 real definition first, and we can just use the same value. */
1562 if (h->u.weakdef != NULL)
1563 {
1564 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1565 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1566 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1567 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1568 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1569 h->non_got_ref = h->u.weakdef->non_got_ref;
1570 return TRUE;
1571 }
1572
1573 /* This is a reference to a symbol defined by a dynamic object which
1574 is not a function. */
1575
1576 /* If we are creating a shared library, we must presume that the
1577 only references to the symbol are via the global offset table.
1578 For such cases we need not do anything here; the relocations will
1579 be handled correctly by relocate_section. */
1580 if (info->shared)
1581 return TRUE;
1582
1583 /* If there are no references to this symbol that do not use the
1584 GOT, we don't need to generate a copy reloc. */
1585 if (!h->non_got_ref)
1586 return TRUE;
1587
1588 /* If -z nocopyreloc was given, we won't generate them either. */
1589 if (info->nocopyreloc)
1590 {
1591 h->non_got_ref = 0;
1592 return TRUE;
1593 }
1594
1595 if (ELIMINATE_COPY_RELOCS)
1596 {
1597 struct elf_s390_link_hash_entry * eh;
1598 struct elf_s390_dyn_relocs *p;
1599
1600 eh = (struct elf_s390_link_hash_entry *) h;
1601 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1602 {
1603 s = p->sec->output_section;
1604 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1605 break;
1606 }
1607
1608 /* If we didn't find any dynamic relocs in read-only sections, then
1609 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1610 if (p == NULL)
1611 {
1612 h->non_got_ref = 0;
1613 return TRUE;
1614 }
1615 }
1616
1617 if (h->size == 0)
1618 {
1619 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1620 h->root.root.string);
1621 return TRUE;
1622 }
1623
1624 /* We must allocate the symbol in our .dynbss section, which will
1625 become part of the .bss section of the executable. There will be
1626 an entry for this symbol in the .dynsym section. The dynamic
1627 object will contain position independent code, so all references
1628 from the dynamic object to this symbol will go through the global
1629 offset table. The dynamic linker will use the .dynsym entry to
1630 determine the address it must put in the global offset table, so
1631 both the dynamic object and the regular object will refer to the
1632 same memory location for the variable. */
1633
1634 htab = elf_s390_hash_table (info);
1635
1636 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1637 copy the initial value out of the dynamic object and into the
1638 runtime process image. */
1639 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1640 {
1641 htab->srelbss->size += sizeof (Elf64_External_Rela);
1642 h->needs_copy = 1;
1643 }
1644
1645 s = htab->sdynbss;
1646
1647 return _bfd_elf_adjust_dynamic_copy (h, s);
1648 }
1649
1650 /* Allocate space in .plt, .got and associated reloc sections for
1651 dynamic relocs. */
1652
1653 static bfd_boolean
1654 allocate_dynrelocs (h, inf)
1655 struct elf_link_hash_entry *h;
1656 PTR inf;
1657 {
1658 struct bfd_link_info *info;
1659 struct elf_s390_link_hash_table *htab;
1660 struct elf_s390_link_hash_entry *eh;
1661 struct elf_s390_dyn_relocs *p;
1662
1663 if (h->root.type == bfd_link_hash_indirect)
1664 return TRUE;
1665
1666 if (h->root.type == bfd_link_hash_warning)
1667 /* When warning symbols are created, they **replace** the "real"
1668 entry in the hash table, thus we never get to see the real
1669 symbol in a hash traversal. So look at it now. */
1670 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1671
1672 info = (struct bfd_link_info *) inf;
1673 htab = elf_s390_hash_table (info);
1674
1675 if (htab->elf.dynamic_sections_created
1676 && h->plt.refcount > 0)
1677 {
1678 /* Make sure this symbol is output as a dynamic symbol.
1679 Undefined weak syms won't yet be marked as dynamic. */
1680 if (h->dynindx == -1
1681 && !h->forced_local)
1682 {
1683 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1684 return FALSE;
1685 }
1686
1687 if (info->shared
1688 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1689 {
1690 asection *s = htab->splt;
1691
1692 /* If this is the first .plt entry, make room for the special
1693 first entry. */
1694 if (s->size == 0)
1695 s->size += PLT_FIRST_ENTRY_SIZE;
1696
1697 h->plt.offset = s->size;
1698
1699 /* If this symbol is not defined in a regular file, and we are
1700 not generating a shared library, then set the symbol to this
1701 location in the .plt. This is required to make function
1702 pointers compare as equal between the normal executable and
1703 the shared library. */
1704 if (! info->shared
1705 && !h->def_regular)
1706 {
1707 h->root.u.def.section = s;
1708 h->root.u.def.value = h->plt.offset;
1709 }
1710
1711 /* Make room for this entry. */
1712 s->size += PLT_ENTRY_SIZE;
1713
1714 /* We also need to make an entry in the .got.plt section, which
1715 will be placed in the .got section by the linker script. */
1716 htab->sgotplt->size += GOT_ENTRY_SIZE;
1717
1718 /* We also need to make an entry in the .rela.plt section. */
1719 htab->srelplt->size += sizeof (Elf64_External_Rela);
1720 }
1721 else
1722 {
1723 h->plt.offset = (bfd_vma) -1;
1724 h->needs_plt = 0;
1725 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1726 }
1727 }
1728 else
1729 {
1730 h->plt.offset = (bfd_vma) -1;
1731 h->needs_plt = 0;
1732 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1733 }
1734
1735 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1736 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1737 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1738 we can save the dynamic TLS relocation. */
1739 if (h->got.refcount > 0
1740 && !info->shared
1741 && h->dynindx == -1
1742 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1743 {
1744 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1745 /* For the GOTIE access without a literal pool entry the offset has
1746 to be stored somewhere. The immediate value in the instruction
1747 is not bit enough so the value is stored in the got. */
1748 {
1749 h->got.offset = htab->sgot->size;
1750 htab->sgot->size += GOT_ENTRY_SIZE;
1751 }
1752 else
1753 h->got.offset = (bfd_vma) -1;
1754 }
1755 else if (h->got.refcount > 0)
1756 {
1757 asection *s;
1758 bfd_boolean dyn;
1759 int tls_type = elf_s390_hash_entry(h)->tls_type;
1760
1761 /* Make sure this symbol is output as a dynamic symbol.
1762 Undefined weak syms won't yet be marked as dynamic. */
1763 if (h->dynindx == -1
1764 && !h->forced_local)
1765 {
1766 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1767 return FALSE;
1768 }
1769
1770 s = htab->sgot;
1771 h->got.offset = s->size;
1772 s->size += GOT_ENTRY_SIZE;
1773 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1774 if (tls_type == GOT_TLS_GD)
1775 s->size += GOT_ENTRY_SIZE;
1776 dyn = htab->elf.dynamic_sections_created;
1777 /* R_390_TLS_IE64 needs one dynamic relocation,
1778 R_390_TLS_GD64 needs one if local symbol and two if global. */
1779 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1780 || tls_type >= GOT_TLS_IE)
1781 htab->srelgot->size += sizeof (Elf64_External_Rela);
1782 else if (tls_type == GOT_TLS_GD)
1783 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1784 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1785 || h->root.type != bfd_link_hash_undefweak)
1786 && (info->shared
1787 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1788 htab->srelgot->size += sizeof (Elf64_External_Rela);
1789 }
1790 else
1791 h->got.offset = (bfd_vma) -1;
1792
1793 eh = (struct elf_s390_link_hash_entry *) h;
1794 if (eh->dyn_relocs == NULL)
1795 return TRUE;
1796
1797 /* In the shared -Bsymbolic case, discard space allocated for
1798 dynamic pc-relative relocs against symbols which turn out to be
1799 defined in regular objects. For the normal shared case, discard
1800 space for pc-relative relocs that have become local due to symbol
1801 visibility changes. */
1802
1803 if (info->shared)
1804 {
1805 if (SYMBOL_CALLS_LOCAL (info, h))
1806 {
1807 struct elf_s390_dyn_relocs **pp;
1808
1809 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1810 {
1811 p->count -= p->pc_count;
1812 p->pc_count = 0;
1813 if (p->count == 0)
1814 *pp = p->next;
1815 else
1816 pp = &p->next;
1817 }
1818 }
1819
1820 /* Also discard relocs on undefined weak syms with non-default
1821 visibility. */
1822 if (eh->dyn_relocs != NULL
1823 && h->root.type == bfd_link_hash_undefweak)
1824 {
1825 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1826 eh->dyn_relocs = NULL;
1827
1828 /* Make sure undefined weak symbols are output as a dynamic
1829 symbol in PIEs. */
1830 else if (h->dynindx == -1
1831 && !h->forced_local)
1832 {
1833 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1834 return FALSE;
1835 }
1836 }
1837 }
1838 else if (ELIMINATE_COPY_RELOCS)
1839 {
1840 /* For the non-shared case, discard space for relocs against
1841 symbols which turn out to need copy relocs or are not
1842 dynamic. */
1843
1844 if (!h->non_got_ref
1845 && ((h->def_dynamic
1846 && !h->def_regular)
1847 || (htab->elf.dynamic_sections_created
1848 && (h->root.type == bfd_link_hash_undefweak
1849 || h->root.type == bfd_link_hash_undefined))))
1850 {
1851 /* Make sure this symbol is output as a dynamic symbol.
1852 Undefined weak syms won't yet be marked as dynamic. */
1853 if (h->dynindx == -1
1854 && !h->forced_local)
1855 {
1856 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1857 return FALSE;
1858 }
1859
1860 /* If that succeeded, we know we'll be keeping all the
1861 relocs. */
1862 if (h->dynindx != -1)
1863 goto keep;
1864 }
1865
1866 eh->dyn_relocs = NULL;
1867
1868 keep: ;
1869 }
1870
1871 /* Finally, allocate space. */
1872 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1873 {
1874 asection *sreloc = elf_section_data (p->sec)->sreloc;
1875 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1876 }
1877
1878 return TRUE;
1879 }
1880
1881 /* Find any dynamic relocs that apply to read-only sections. */
1882
1883 static bfd_boolean
1884 readonly_dynrelocs (h, inf)
1885 struct elf_link_hash_entry *h;
1886 PTR inf;
1887 {
1888 struct elf_s390_link_hash_entry *eh;
1889 struct elf_s390_dyn_relocs *p;
1890
1891 if (h->root.type == bfd_link_hash_warning)
1892 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1893
1894 eh = (struct elf_s390_link_hash_entry *) h;
1895 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1896 {
1897 asection *s = p->sec->output_section;
1898
1899 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1900 {
1901 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1902
1903 info->flags |= DF_TEXTREL;
1904
1905 /* Not an error, just cut short the traversal. */
1906 return FALSE;
1907 }
1908 }
1909 return TRUE;
1910 }
1911
1912 /* Set the sizes of the dynamic sections. */
1913
1914 static bfd_boolean
1915 elf_s390_size_dynamic_sections (output_bfd, info)
1916 bfd *output_bfd ATTRIBUTE_UNUSED;
1917 struct bfd_link_info *info;
1918 {
1919 struct elf_s390_link_hash_table *htab;
1920 bfd *dynobj;
1921 asection *s;
1922 bfd_boolean relocs;
1923 bfd *ibfd;
1924
1925 htab = elf_s390_hash_table (info);
1926 dynobj = htab->elf.dynobj;
1927 if (dynobj == NULL)
1928 abort ();
1929
1930 if (htab->elf.dynamic_sections_created)
1931 {
1932 /* Set the contents of the .interp section to the interpreter. */
1933 if (info->executable)
1934 {
1935 s = bfd_get_section_by_name (dynobj, ".interp");
1936 if (s == NULL)
1937 abort ();
1938 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1939 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1940 }
1941 }
1942
1943 /* Set up .got offsets for local syms, and space for local dynamic
1944 relocs. */
1945 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1946 {
1947 bfd_signed_vma *local_got;
1948 bfd_signed_vma *end_local_got;
1949 char *local_tls_type;
1950 bfd_size_type locsymcount;
1951 Elf_Internal_Shdr *symtab_hdr;
1952 asection *srela;
1953
1954 if (! is_s390_elf (ibfd))
1955 continue;
1956
1957 for (s = ibfd->sections; s != NULL; s = s->next)
1958 {
1959 struct elf_s390_dyn_relocs *p;
1960
1961 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1962 {
1963 if (!bfd_is_abs_section (p->sec)
1964 && bfd_is_abs_section (p->sec->output_section))
1965 {
1966 /* Input section has been discarded, either because
1967 it is a copy of a linkonce section or due to
1968 linker script /DISCARD/, so we'll be discarding
1969 the relocs too. */
1970 }
1971 else if (p->count != 0)
1972 {
1973 srela = elf_section_data (p->sec)->sreloc;
1974 srela->size += p->count * sizeof (Elf64_External_Rela);
1975 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1976 info->flags |= DF_TEXTREL;
1977 }
1978 }
1979 }
1980
1981 local_got = elf_local_got_refcounts (ibfd);
1982 if (!local_got)
1983 continue;
1984
1985 symtab_hdr = &elf_symtab_hdr (ibfd);
1986 locsymcount = symtab_hdr->sh_info;
1987 end_local_got = local_got + locsymcount;
1988 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1989 s = htab->sgot;
1990 srela = htab->srelgot;
1991 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1992 {
1993 if (*local_got > 0)
1994 {
1995 *local_got = s->size;
1996 s->size += GOT_ENTRY_SIZE;
1997 if (*local_tls_type == GOT_TLS_GD)
1998 s->size += GOT_ENTRY_SIZE;
1999 if (info->shared)
2000 srela->size += sizeof (Elf64_External_Rela);
2001 }
2002 else
2003 *local_got = (bfd_vma) -1;
2004 }
2005 }
2006
2007 if (htab->tls_ldm_got.refcount > 0)
2008 {
2009 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2010 relocs. */
2011 htab->tls_ldm_got.offset = htab->sgot->size;
2012 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2013 htab->srelgot->size += sizeof (Elf64_External_Rela);
2014 }
2015 else
2016 htab->tls_ldm_got.offset = -1;
2017
2018 /* Allocate global sym .plt and .got entries, and space for global
2019 sym dynamic relocs. */
2020 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2021
2022 /* We now have determined the sizes of the various dynamic sections.
2023 Allocate memory for them. */
2024 relocs = FALSE;
2025 for (s = dynobj->sections; s != NULL; s = s->next)
2026 {
2027 if ((s->flags & SEC_LINKER_CREATED) == 0)
2028 continue;
2029
2030 if (s == htab->splt
2031 || s == htab->sgot
2032 || s == htab->sgotplt
2033 || s == htab->sdynbss)
2034 {
2035 /* Strip this section if we don't need it; see the
2036 comment below. */
2037 }
2038 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2039 {
2040 if (s->size != 0 && s != htab->srelplt)
2041 relocs = TRUE;
2042
2043 /* We use the reloc_count field as a counter if we need
2044 to copy relocs into the output file. */
2045 s->reloc_count = 0;
2046 }
2047 else
2048 {
2049 /* It's not one of our sections, so don't allocate space. */
2050 continue;
2051 }
2052
2053 if (s->size == 0)
2054 {
2055 /* If we don't need this section, strip it from the
2056 output file. This is to handle .rela.bss and
2057 .rela.plt. We must create it in
2058 create_dynamic_sections, because it must be created
2059 before the linker maps input sections to output
2060 sections. The linker does that before
2061 adjust_dynamic_symbol is called, and it is that
2062 function which decides whether anything needs to go
2063 into these sections. */
2064
2065 s->flags |= SEC_EXCLUDE;
2066 continue;
2067 }
2068
2069 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2070 continue;
2071
2072 /* Allocate memory for the section contents. We use bfd_zalloc
2073 here in case unused entries are not reclaimed before the
2074 section's contents are written out. This should not happen,
2075 but this way if it does, we get a R_390_NONE reloc instead
2076 of garbage. */
2077 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2078 if (s->contents == NULL)
2079 return FALSE;
2080 }
2081
2082 if (htab->elf.dynamic_sections_created)
2083 {
2084 /* Add some entries to the .dynamic section. We fill in the
2085 values later, in elf_s390_finish_dynamic_sections, but we
2086 must add the entries now so that we get the correct size for
2087 the .dynamic section. The DT_DEBUG entry is filled in by the
2088 dynamic linker and used by the debugger. */
2089 #define add_dynamic_entry(TAG, VAL) \
2090 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2091
2092 if (info->executable)
2093 {
2094 if (!add_dynamic_entry (DT_DEBUG, 0))
2095 return FALSE;
2096 }
2097
2098 if (htab->splt->size != 0)
2099 {
2100 if (!add_dynamic_entry (DT_PLTGOT, 0)
2101 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2102 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2103 || !add_dynamic_entry (DT_JMPREL, 0))
2104 return FALSE;
2105 }
2106
2107 if (relocs)
2108 {
2109 if (!add_dynamic_entry (DT_RELA, 0)
2110 || !add_dynamic_entry (DT_RELASZ, 0)
2111 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2112 return FALSE;
2113
2114 /* If any dynamic relocs apply to a read-only section,
2115 then we need a DT_TEXTREL entry. */
2116 if ((info->flags & DF_TEXTREL) == 0)
2117 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2118 (PTR) info);
2119
2120 if ((info->flags & DF_TEXTREL) != 0)
2121 {
2122 if (!add_dynamic_entry (DT_TEXTREL, 0))
2123 return FALSE;
2124 }
2125 }
2126 }
2127 #undef add_dynamic_entry
2128
2129 return TRUE;
2130 }
2131
2132 /* Return the base VMA address which should be subtracted from real addresses
2133 when resolving @dtpoff relocation.
2134 This is PT_TLS segment p_vaddr. */
2135
2136 static bfd_vma
2137 dtpoff_base (info)
2138 struct bfd_link_info *info;
2139 {
2140 /* If tls_sec is NULL, we should have signalled an error already. */
2141 if (elf_hash_table (info)->tls_sec == NULL)
2142 return 0;
2143 return elf_hash_table (info)->tls_sec->vma;
2144 }
2145
2146 /* Return the relocation value for @tpoff relocation
2147 if STT_TLS virtual address is ADDRESS. */
2148
2149 static bfd_vma
2150 tpoff (info, address)
2151 struct bfd_link_info *info;
2152 bfd_vma address;
2153 {
2154 struct elf_link_hash_table *htab = elf_hash_table (info);
2155
2156 /* If tls_sec is NULL, we should have signalled an error already. */
2157 if (htab->tls_sec == NULL)
2158 return 0;
2159 return htab->tls_size + htab->tls_sec->vma - address;
2160 }
2161
2162 /* Complain if TLS instruction relocation is against an invalid
2163 instruction. */
2164
2165 static void
2166 invalid_tls_insn (input_bfd, input_section, rel)
2167 bfd *input_bfd;
2168 asection *input_section;
2169 Elf_Internal_Rela *rel;
2170 {
2171 reloc_howto_type *howto;
2172
2173 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2174 (*_bfd_error_handler)
2175 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2176 input_bfd,
2177 input_section,
2178 (long) rel->r_offset,
2179 howto->name);
2180 bfd_set_error (bfd_error_bad_value);
2181 }
2182
2183 /* Relocate a 390 ELF section. */
2184
2185 static bfd_boolean
2186 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2187 contents, relocs, local_syms, local_sections)
2188 bfd *output_bfd;
2189 struct bfd_link_info *info;
2190 bfd *input_bfd;
2191 asection *input_section;
2192 bfd_byte *contents;
2193 Elf_Internal_Rela *relocs;
2194 Elf_Internal_Sym *local_syms;
2195 asection **local_sections;
2196 {
2197 struct elf_s390_link_hash_table *htab;
2198 Elf_Internal_Shdr *symtab_hdr;
2199 struct elf_link_hash_entry **sym_hashes;
2200 bfd_vma *local_got_offsets;
2201 Elf_Internal_Rela *rel;
2202 Elf_Internal_Rela *relend;
2203
2204 BFD_ASSERT (is_s390_elf (input_bfd));
2205
2206 htab = elf_s390_hash_table (info);
2207 symtab_hdr = &elf_symtab_hdr (input_bfd);
2208 sym_hashes = elf_sym_hashes (input_bfd);
2209 local_got_offsets = elf_local_got_offsets (input_bfd);
2210
2211 rel = relocs;
2212 relend = relocs + input_section->reloc_count;
2213 for (; rel < relend; rel++)
2214 {
2215 unsigned int r_type;
2216 reloc_howto_type *howto;
2217 unsigned long r_symndx;
2218 struct elf_link_hash_entry *h;
2219 Elf_Internal_Sym *sym;
2220 asection *sec;
2221 bfd_vma off;
2222 bfd_vma relocation;
2223 bfd_boolean unresolved_reloc;
2224 bfd_reloc_status_type r;
2225 int tls_type;
2226
2227 r_type = ELF64_R_TYPE (rel->r_info);
2228 if (r_type == (int) R_390_GNU_VTINHERIT
2229 || r_type == (int) R_390_GNU_VTENTRY)
2230 continue;
2231 if (r_type >= (int) R_390_max)
2232 {
2233 bfd_set_error (bfd_error_bad_value);
2234 return FALSE;
2235 }
2236
2237 howto = elf_howto_table + r_type;
2238 r_symndx = ELF64_R_SYM (rel->r_info);
2239
2240 h = NULL;
2241 sym = NULL;
2242 sec = NULL;
2243 unresolved_reloc = FALSE;
2244 if (r_symndx < symtab_hdr->sh_info)
2245 {
2246 sym = local_syms + r_symndx;
2247 sec = local_sections[r_symndx];
2248 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2249 }
2250 else
2251 {
2252 bfd_boolean warned ATTRIBUTE_UNUSED;
2253
2254 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2255 r_symndx, symtab_hdr, sym_hashes,
2256 h, sec, relocation,
2257 unresolved_reloc, warned);
2258 }
2259
2260 if (sec != NULL && elf_discarded_section (sec))
2261 {
2262 /* For relocs against symbols from removed linkonce sections,
2263 or sections discarded by a linker script, we just want the
2264 section contents zeroed. Avoid any special processing. */
2265 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2266 rel->r_info = 0;
2267 rel->r_addend = 0;
2268 continue;
2269 }
2270
2271 if (info->relocatable)
2272 continue;
2273
2274 switch (r_type)
2275 {
2276 case R_390_GOTPLT12:
2277 case R_390_GOTPLT16:
2278 case R_390_GOTPLT20:
2279 case R_390_GOTPLT32:
2280 case R_390_GOTPLT64:
2281 case R_390_GOTPLTENT:
2282 /* There are three cases for a GOTPLT relocation. 1) The
2283 relocation is against the jump slot entry of a plt that
2284 will get emitted to the output file. 2) The relocation
2285 is against the jump slot of a plt entry that has been
2286 removed. elf_s390_adjust_gotplt has created a GOT entry
2287 as replacement. 3) The relocation is against a local symbol.
2288 Cases 2) and 3) are the same as the GOT relocation code
2289 so we just have to test for case 1 and fall through for
2290 the other two. */
2291 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2292 {
2293 bfd_vma plt_index;
2294
2295 /* Calc. index no.
2296 Current offset - size first entry / entry size. */
2297 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2298 PLT_ENTRY_SIZE;
2299
2300 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2301 addr & GOT addr. */
2302 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2303 unresolved_reloc = FALSE;
2304
2305 if (r_type == R_390_GOTPLTENT)
2306 relocation += htab->sgot->output_section->vma;
2307 break;
2308 }
2309 /* Fall through. */
2310
2311 case R_390_GOT12:
2312 case R_390_GOT16:
2313 case R_390_GOT20:
2314 case R_390_GOT32:
2315 case R_390_GOT64:
2316 case R_390_GOTENT:
2317 /* Relocation is to the entry for this symbol in the global
2318 offset table. */
2319 if (htab->sgot == NULL)
2320 abort ();
2321
2322 if (h != NULL)
2323 {
2324 bfd_boolean dyn;
2325
2326 off = h->got.offset;
2327 dyn = htab->elf.dynamic_sections_created;
2328 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2329 || (info->shared
2330 && SYMBOL_REFERENCES_LOCAL (info, h))
2331 || (ELF_ST_VISIBILITY (h->other)
2332 && h->root.type == bfd_link_hash_undefweak))
2333 {
2334 /* This is actually a static link, or it is a
2335 -Bsymbolic link and the symbol is defined
2336 locally, or the symbol was forced to be local
2337 because of a version file. We must initialize
2338 this entry in the global offset table. Since the
2339 offset must always be a multiple of 2, we use the
2340 least significant bit to record whether we have
2341 initialized it already.
2342
2343 When doing a dynamic link, we create a .rel.got
2344 relocation entry to initialize the value. This
2345 is done in the finish_dynamic_symbol routine. */
2346 if ((off & 1) != 0)
2347 off &= ~1;
2348 else
2349 {
2350 bfd_put_64 (output_bfd, relocation,
2351 htab->sgot->contents + off);
2352 h->got.offset |= 1;
2353 }
2354 }
2355 else
2356 unresolved_reloc = FALSE;
2357 }
2358 else
2359 {
2360 if (local_got_offsets == NULL)
2361 abort ();
2362
2363 off = local_got_offsets[r_symndx];
2364
2365 /* The offset must always be a multiple of 8. We use
2366 the least significant bit to record whether we have
2367 already generated the necessary reloc. */
2368 if ((off & 1) != 0)
2369 off &= ~1;
2370 else
2371 {
2372 bfd_put_64 (output_bfd, relocation,
2373 htab->sgot->contents + off);
2374
2375 if (info->shared)
2376 {
2377 asection *s;
2378 Elf_Internal_Rela outrel;
2379 bfd_byte *loc;
2380
2381 s = htab->srelgot;
2382 if (s == NULL)
2383 abort ();
2384
2385 outrel.r_offset = (htab->sgot->output_section->vma
2386 + htab->sgot->output_offset
2387 + off);
2388 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2389 outrel.r_addend = relocation;
2390 loc = s->contents;
2391 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2392 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2393 }
2394
2395 local_got_offsets[r_symndx] |= 1;
2396 }
2397 }
2398
2399 if (off >= (bfd_vma) -2)
2400 abort ();
2401
2402 relocation = htab->sgot->output_offset + off;
2403
2404 /* For @GOTENT the relocation is against the offset between
2405 the instruction and the symbols entry in the GOT and not
2406 between the start of the GOT and the symbols entry. We
2407 add the vma of the GOT to get the correct value. */
2408 if ( r_type == R_390_GOTENT
2409 || r_type == R_390_GOTPLTENT)
2410 relocation += htab->sgot->output_section->vma;
2411
2412 break;
2413
2414 case R_390_GOTOFF16:
2415 case R_390_GOTOFF32:
2416 case R_390_GOTOFF64:
2417 /* Relocation is relative to the start of the global offset
2418 table. */
2419
2420 /* Note that sgot->output_offset is not involved in this
2421 calculation. We always want the start of .got. If we
2422 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2423 permitted by the ABI, we might have to change this
2424 calculation. */
2425 relocation -= htab->sgot->output_section->vma;
2426 break;
2427
2428 case R_390_GOTPC:
2429 case R_390_GOTPCDBL:
2430 /* Use global offset table as symbol value. */
2431 relocation = htab->sgot->output_section->vma;
2432 unresolved_reloc = FALSE;
2433 break;
2434
2435 case R_390_PLT16DBL:
2436 case R_390_PLT32:
2437 case R_390_PLT32DBL:
2438 case R_390_PLT64:
2439 /* Relocation is to the entry for this symbol in the
2440 procedure linkage table. */
2441
2442 /* Resolve a PLT32 reloc against a local symbol directly,
2443 without using the procedure linkage table. */
2444 if (h == NULL)
2445 break;
2446
2447 if (h->plt.offset == (bfd_vma) -1
2448 || htab->splt == NULL)
2449 {
2450 /* We didn't make a PLT entry for this symbol. This
2451 happens when statically linking PIC code, or when
2452 using -Bsymbolic. */
2453 break;
2454 }
2455
2456 relocation = (htab->splt->output_section->vma
2457 + htab->splt->output_offset
2458 + h->plt.offset);
2459 unresolved_reloc = FALSE;
2460 break;
2461
2462 case R_390_PLTOFF16:
2463 case R_390_PLTOFF32:
2464 case R_390_PLTOFF64:
2465 /* Relocation is to the entry for this symbol in the
2466 procedure linkage table relative to the start of the GOT. */
2467
2468 /* For local symbols or if we didn't make a PLT entry for
2469 this symbol resolve the symbol directly. */
2470 if ( h == NULL
2471 || h->plt.offset == (bfd_vma) -1
2472 || htab->splt == NULL)
2473 {
2474 relocation -= htab->sgot->output_section->vma;
2475 break;
2476 }
2477
2478 relocation = (htab->splt->output_section->vma
2479 + htab->splt->output_offset
2480 + h->plt.offset
2481 - htab->sgot->output_section->vma);
2482 unresolved_reloc = FALSE;
2483 break;
2484
2485 case R_390_8:
2486 case R_390_16:
2487 case R_390_32:
2488 case R_390_64:
2489 case R_390_PC16:
2490 case R_390_PC16DBL:
2491 case R_390_PC32:
2492 case R_390_PC32DBL:
2493 case R_390_PC64:
2494 if ((input_section->flags & SEC_ALLOC) == 0)
2495 break;
2496
2497 if ((info->shared
2498 && (h == NULL
2499 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2500 || h->root.type != bfd_link_hash_undefweak)
2501 && ((r_type != R_390_PC16
2502 && r_type != R_390_PC16DBL
2503 && r_type != R_390_PC32
2504 && r_type != R_390_PC32DBL
2505 && r_type != R_390_PC64)
2506 || !SYMBOL_CALLS_LOCAL (info, h)))
2507 || (ELIMINATE_COPY_RELOCS
2508 && !info->shared
2509 && h != NULL
2510 && h->dynindx != -1
2511 && !h->non_got_ref
2512 && ((h->def_dynamic
2513 && !h->def_regular)
2514 || h->root.type == bfd_link_hash_undefweak
2515 || h->root.type == bfd_link_hash_undefined)))
2516 {
2517 Elf_Internal_Rela outrel;
2518 bfd_boolean skip, relocate;
2519 asection *sreloc;
2520 bfd_byte *loc;
2521
2522 /* When generating a shared object, these relocations
2523 are copied into the output file to be resolved at run
2524 time. */
2525 skip = FALSE;
2526 relocate = FALSE;
2527
2528 outrel.r_offset =
2529 _bfd_elf_section_offset (output_bfd, info, input_section,
2530 rel->r_offset);
2531 if (outrel.r_offset == (bfd_vma) -1)
2532 skip = TRUE;
2533 else if (outrel.r_offset == (bfd_vma) -2)
2534 skip = TRUE, relocate = TRUE;
2535
2536 outrel.r_offset += (input_section->output_section->vma
2537 + input_section->output_offset);
2538
2539 if (skip)
2540 memset (&outrel, 0, sizeof outrel);
2541 else if (h != NULL
2542 && h->dynindx != -1
2543 && (r_type == R_390_PC16
2544 || r_type == R_390_PC16DBL
2545 || r_type == R_390_PC32
2546 || r_type == R_390_PC32DBL
2547 || r_type == R_390_PC64
2548 || !info->shared
2549 || !SYMBOLIC_BIND (info, h)
2550 || !h->def_regular))
2551 {
2552 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2553 outrel.r_addend = rel->r_addend;
2554 }
2555 else
2556 {
2557 /* This symbol is local, or marked to become local. */
2558 outrel.r_addend = relocation + rel->r_addend;
2559 if (r_type == R_390_64)
2560 {
2561 relocate = TRUE;
2562 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2563 }
2564 else
2565 {
2566 long sindx;
2567
2568 if (bfd_is_abs_section (sec))
2569 sindx = 0;
2570 else if (sec == NULL || sec->owner == NULL)
2571 {
2572 bfd_set_error(bfd_error_bad_value);
2573 return FALSE;
2574 }
2575 else
2576 {
2577 asection *osec;
2578
2579 osec = sec->output_section;
2580 sindx = elf_section_data (osec)->dynindx;
2581
2582 if (sindx == 0)
2583 {
2584 osec = htab->elf.text_index_section;
2585 sindx = elf_section_data (osec)->dynindx;
2586 }
2587 BFD_ASSERT (sindx != 0);
2588
2589 /* We are turning this relocation into one
2590 against a section symbol, so subtract out
2591 the output section's address but not the
2592 offset of the input section in the output
2593 section. */
2594 outrel.r_addend -= osec->vma;
2595 }
2596 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2597 }
2598 }
2599
2600 sreloc = elf_section_data (input_section)->sreloc;
2601 if (sreloc == NULL)
2602 abort ();
2603
2604 loc = sreloc->contents;
2605 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2606 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2607
2608 /* If this reloc is against an external symbol, we do
2609 not want to fiddle with the addend. Otherwise, we
2610 need to include the symbol value so that it becomes
2611 an addend for the dynamic reloc. */
2612 if (! relocate)
2613 continue;
2614 }
2615
2616 break;
2617
2618 /* Relocations for tls literal pool entries. */
2619 case R_390_TLS_IE64:
2620 if (info->shared)
2621 {
2622 Elf_Internal_Rela outrel;
2623 asection *sreloc;
2624 bfd_byte *loc;
2625
2626 outrel.r_offset = rel->r_offset
2627 + input_section->output_section->vma
2628 + input_section->output_offset;
2629 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2630 sreloc = elf_section_data (input_section)->sreloc;
2631 if (sreloc == NULL)
2632 abort ();
2633 loc = sreloc->contents;
2634 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2635 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2636 }
2637 /* Fall through. */
2638
2639 case R_390_TLS_GD64:
2640 case R_390_TLS_GOTIE64:
2641 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2642 tls_type = GOT_UNKNOWN;
2643 if (h == NULL && local_got_offsets)
2644 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2645 else if (h != NULL)
2646 {
2647 tls_type = elf_s390_hash_entry(h)->tls_type;
2648 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2649 r_type = R_390_TLS_LE64;
2650 }
2651 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2652 r_type = R_390_TLS_IE64;
2653
2654 if (r_type == R_390_TLS_LE64)
2655 {
2656 /* This relocation gets optimized away by the local exec
2657 access optimization. */
2658 BFD_ASSERT (! unresolved_reloc);
2659 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2660 contents + rel->r_offset);
2661 continue;
2662 }
2663
2664 if (htab->sgot == NULL)
2665 abort ();
2666
2667 if (h != NULL)
2668 off = h->got.offset;
2669 else
2670 {
2671 if (local_got_offsets == NULL)
2672 abort ();
2673
2674 off = local_got_offsets[r_symndx];
2675 }
2676
2677 emit_tls_relocs:
2678
2679 if ((off & 1) != 0)
2680 off &= ~1;
2681 else
2682 {
2683 Elf_Internal_Rela outrel;
2684 bfd_byte *loc;
2685 int dr_type, indx;
2686
2687 if (htab->srelgot == NULL)
2688 abort ();
2689
2690 outrel.r_offset = (htab->sgot->output_section->vma
2691 + htab->sgot->output_offset + off);
2692
2693 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2694 if (r_type == R_390_TLS_GD64)
2695 dr_type = R_390_TLS_DTPMOD;
2696 else
2697 dr_type = R_390_TLS_TPOFF;
2698 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2699 outrel.r_addend = relocation - dtpoff_base (info);
2700 else
2701 outrel.r_addend = 0;
2702 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2703 loc = htab->srelgot->contents;
2704 loc += htab->srelgot->reloc_count++
2705 * sizeof (Elf64_External_Rela);
2706 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2707
2708 if (r_type == R_390_TLS_GD64)
2709 {
2710 if (indx == 0)
2711 {
2712 BFD_ASSERT (! unresolved_reloc);
2713 bfd_put_64 (output_bfd,
2714 relocation - dtpoff_base (info),
2715 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2716 }
2717 else
2718 {
2719 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2720 outrel.r_offset += GOT_ENTRY_SIZE;
2721 outrel.r_addend = 0;
2722 htab->srelgot->reloc_count++;
2723 loc += sizeof (Elf64_External_Rela);
2724 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2725 }
2726 }
2727
2728 if (h != NULL)
2729 h->got.offset |= 1;
2730 else
2731 local_got_offsets[r_symndx] |= 1;
2732 }
2733
2734 if (off >= (bfd_vma) -2)
2735 abort ();
2736 if (r_type == ELF64_R_TYPE (rel->r_info))
2737 {
2738 relocation = htab->sgot->output_offset + off;
2739 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2740 relocation += htab->sgot->output_section->vma;
2741 unresolved_reloc = FALSE;
2742 }
2743 else
2744 {
2745 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2746 contents + rel->r_offset);
2747 continue;
2748 }
2749 break;
2750
2751 case R_390_TLS_GOTIE12:
2752 case R_390_TLS_GOTIE20:
2753 case R_390_TLS_IEENT:
2754 if (h == NULL)
2755 {
2756 if (local_got_offsets == NULL)
2757 abort();
2758 off = local_got_offsets[r_symndx];
2759 if (info->shared)
2760 goto emit_tls_relocs;
2761 }
2762 else
2763 {
2764 off = h->got.offset;
2765 tls_type = elf_s390_hash_entry(h)->tls_type;
2766 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2767 goto emit_tls_relocs;
2768 }
2769
2770 if (htab->sgot == NULL)
2771 abort ();
2772
2773 BFD_ASSERT (! unresolved_reloc);
2774 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2775 htab->sgot->contents + off);
2776 relocation = htab->sgot->output_offset + off;
2777 if (r_type == R_390_TLS_IEENT)
2778 relocation += htab->sgot->output_section->vma;
2779 unresolved_reloc = FALSE;
2780 break;
2781
2782 case R_390_TLS_LDM64:
2783 if (! info->shared)
2784 /* The literal pool entry this relocation refers to gets ignored
2785 by the optimized code of the local exec model. Do nothing
2786 and the value will turn out zero. */
2787 continue;
2788
2789 if (htab->sgot == NULL)
2790 abort ();
2791
2792 off = htab->tls_ldm_got.offset;
2793 if (off & 1)
2794 off &= ~1;
2795 else
2796 {
2797 Elf_Internal_Rela outrel;
2798 bfd_byte *loc;
2799
2800 if (htab->srelgot == NULL)
2801 abort ();
2802
2803 outrel.r_offset = (htab->sgot->output_section->vma
2804 + htab->sgot->output_offset + off);
2805
2806 bfd_put_64 (output_bfd, 0,
2807 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2808 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2809 outrel.r_addend = 0;
2810 loc = htab->srelgot->contents;
2811 loc += htab->srelgot->reloc_count++
2812 * sizeof (Elf64_External_Rela);
2813 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2814 htab->tls_ldm_got.offset |= 1;
2815 }
2816 relocation = htab->sgot->output_offset + off;
2817 unresolved_reloc = FALSE;
2818 break;
2819
2820 case R_390_TLS_LE64:
2821 if (info->shared)
2822 {
2823 /* Linking a shared library with non-fpic code requires
2824 a R_390_TLS_TPOFF relocation. */
2825 Elf_Internal_Rela outrel;
2826 asection *sreloc;
2827 bfd_byte *loc;
2828 int indx;
2829
2830 outrel.r_offset = rel->r_offset
2831 + input_section->output_section->vma
2832 + input_section->output_offset;
2833 if (h != NULL && h->dynindx != -1)
2834 indx = h->dynindx;
2835 else
2836 indx = 0;
2837 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2838 if (indx == 0)
2839 outrel.r_addend = relocation - dtpoff_base (info);
2840 else
2841 outrel.r_addend = 0;
2842 sreloc = elf_section_data (input_section)->sreloc;
2843 if (sreloc == NULL)
2844 abort ();
2845 loc = sreloc->contents;
2846 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2847 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2848 }
2849 else
2850 {
2851 BFD_ASSERT (! unresolved_reloc);
2852 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2853 contents + rel->r_offset);
2854 }
2855 continue;
2856
2857 case R_390_TLS_LDO64:
2858 if (info->shared)
2859 relocation -= dtpoff_base (info);
2860 else
2861 /* When converting LDO to LE, we must negate. */
2862 relocation = -tpoff (info, relocation);
2863 break;
2864
2865 /* Relocations for tls instructions. */
2866 case R_390_TLS_LOAD:
2867 case R_390_TLS_GDCALL:
2868 case R_390_TLS_LDCALL:
2869 tls_type = GOT_UNKNOWN;
2870 if (h == NULL && local_got_offsets)
2871 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2872 else if (h != NULL)
2873 tls_type = elf_s390_hash_entry(h)->tls_type;
2874
2875 if (tls_type == GOT_TLS_GD)
2876 continue;
2877
2878 if (r_type == R_390_TLS_LOAD)
2879 {
2880 if (!info->shared && (h == NULL || h->dynindx == -1))
2881 {
2882 /* IE->LE transition. Four valid cases:
2883 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2884 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2885 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2886 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2887 unsigned int insn0, insn1, ry;
2888
2889 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2890 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2891 if (insn1 != 0x0004)
2892 invalid_tls_insn (input_bfd, input_section, rel);
2893 ry = 0;
2894 if ((insn0 & 0xff00f000) == 0xe3000000)
2895 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2896 ry = (insn0 & 0x000f0000);
2897 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2898 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2899 ry = (insn0 & 0x0000f000) << 4;
2900 else if ((insn0 & 0xff00f000) == 0xe300c000)
2901 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2902 ry = (insn0 & 0x000f0000);
2903 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2904 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2905 ry = (insn0 & 0x0000f000) << 4;
2906 else
2907 invalid_tls_insn (input_bfd, input_section, rel);
2908 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2909 insn1 = 0x000d;
2910 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2911 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2912 }
2913 }
2914 else if (r_type == R_390_TLS_GDCALL)
2915 {
2916 unsigned int insn0, insn1;
2917
2918 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2919 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2920 if ((insn0 & 0xffff0000) != 0xc0e50000)
2921 invalid_tls_insn (input_bfd, input_section, rel);
2922 if (!info->shared && (h == NULL || h->dynindx == -1))
2923 {
2924 /* GD->LE transition.
2925 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2926 insn0 = 0xc0040000;
2927 insn1 = 0x0000;
2928 }
2929 else
2930 {
2931 /* GD->IE transition.
2932 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2933 insn0 = 0xe322c000;
2934 insn1 = 0x0004;
2935 }
2936 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2937 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2938 }
2939 else if (r_type == R_390_TLS_LDCALL)
2940 {
2941 if (!info->shared)
2942 {
2943 unsigned int insn0, insn1;
2944
2945 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2946 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2947 if ((insn0 & 0xffff0000) != 0xc0e50000)
2948 invalid_tls_insn (input_bfd, input_section, rel);
2949 /* LD->LE transition.
2950 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2951 insn0 = 0xc0040000;
2952 insn1 = 0x0000;
2953 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2954 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2955 }
2956 }
2957 continue;
2958
2959 default:
2960 break;
2961 }
2962
2963 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2964 because such sections are not SEC_ALLOC and thus ld.so will
2965 not process them. */
2966 if (unresolved_reloc
2967 && !((input_section->flags & SEC_DEBUGGING) != 0
2968 && h->def_dynamic))
2969 (*_bfd_error_handler)
2970 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2971 input_bfd,
2972 input_section,
2973 (long) rel->r_offset,
2974 howto->name,
2975 h->root.root.string);
2976
2977 if (r_type == R_390_20
2978 || r_type == R_390_GOT20
2979 || r_type == R_390_GOTPLT20
2980 || r_type == R_390_TLS_GOTIE20)
2981 {
2982 relocation += rel->r_addend;
2983 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2984 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2985 contents, rel->r_offset,
2986 relocation, 0);
2987 }
2988 else
2989 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2990 contents, rel->r_offset,
2991 relocation, rel->r_addend);
2992
2993 if (r != bfd_reloc_ok)
2994 {
2995 const char *name;
2996
2997 if (h != NULL)
2998 name = h->root.root.string;
2999 else
3000 {
3001 name = bfd_elf_string_from_elf_section (input_bfd,
3002 symtab_hdr->sh_link,
3003 sym->st_name);
3004 if (name == NULL)
3005 return FALSE;
3006 if (*name == '\0')
3007 name = bfd_section_name (input_bfd, sec);
3008 }
3009
3010 if (r == bfd_reloc_overflow)
3011 {
3012
3013 if (! ((*info->callbacks->reloc_overflow)
3014 (info, (h ? &h->root : NULL), name, howto->name,
3015 (bfd_vma) 0, input_bfd, input_section,
3016 rel->r_offset)))
3017 return FALSE;
3018 }
3019 else
3020 {
3021 (*_bfd_error_handler)
3022 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3023 input_bfd, input_section,
3024 (long) rel->r_offset, name, (int) r);
3025 return FALSE;
3026 }
3027 }
3028 }
3029
3030 return TRUE;
3031 }
3032
3033 /* Finish up dynamic symbol handling. We set the contents of various
3034 dynamic sections here. */
3035
3036 static bfd_boolean
3037 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3038 bfd *output_bfd;
3039 struct bfd_link_info *info;
3040 struct elf_link_hash_entry *h;
3041 Elf_Internal_Sym *sym;
3042 {
3043 struct elf_s390_link_hash_table *htab;
3044
3045 htab = elf_s390_hash_table (info);
3046
3047 if (h->plt.offset != (bfd_vma) -1)
3048 {
3049 bfd_vma plt_index;
3050 bfd_vma got_offset;
3051 Elf_Internal_Rela rela;
3052 bfd_byte *loc;
3053
3054 /* This symbol has an entry in the procedure linkage table. Set
3055 it up. */
3056
3057 if (h->dynindx == -1
3058 || htab->splt == NULL
3059 || htab->sgotplt == NULL
3060 || htab->srelplt == NULL)
3061 abort ();
3062
3063 /* Calc. index no.
3064 Current offset - size first entry / entry size. */
3065 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3066
3067 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3068 addr & GOT addr. */
3069 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3070
3071 /* Fill in the blueprint of a PLT. */
3072 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3073 htab->splt->contents + h->plt.offset);
3074 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3075 htab->splt->contents + h->plt.offset + 4);
3076 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3077 htab->splt->contents + h->plt.offset + 8);
3078 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3079 htab->splt->contents + h->plt.offset + 12);
3080 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3081 htab->splt->contents + h->plt.offset + 16);
3082 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3083 htab->splt->contents + h->plt.offset + 20);
3084 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3085 htab->splt->contents + h->plt.offset + 24);
3086 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3087 htab->splt->contents + h->plt.offset + 28);
3088 /* Fixup the relative address to the GOT entry */
3089 bfd_put_32 (output_bfd,
3090 (htab->sgotplt->output_section->vma +
3091 htab->sgotplt->output_offset + got_offset
3092 - (htab->splt->output_section->vma + h->plt.offset))/2,
3093 htab->splt->contents + h->plt.offset + 2);
3094 /* Fixup the relative branch to PLT 0 */
3095 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3096 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3097 htab->splt->contents + h->plt.offset + 24);
3098 /* Fixup offset into symbol table */
3099 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3100 htab->splt->contents + h->plt.offset + 28);
3101
3102 /* Fill in the entry in the global offset table.
3103 Points to instruction after GOT offset. */
3104 bfd_put_64 (output_bfd,
3105 (htab->splt->output_section->vma
3106 + htab->splt->output_offset
3107 + h->plt.offset
3108 + 14),
3109 htab->sgotplt->contents + got_offset);
3110
3111 /* Fill in the entry in the .rela.plt section. */
3112 rela.r_offset = (htab->sgotplt->output_section->vma
3113 + htab->sgotplt->output_offset
3114 + got_offset);
3115 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3116 rela.r_addend = 0;
3117 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3118 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3119
3120 if (!h->def_regular)
3121 {
3122 /* Mark the symbol as undefined, rather than as defined in
3123 the .plt section. Leave the value alone. This is a clue
3124 for the dynamic linker, to make function pointer
3125 comparisons work between an application and shared
3126 library. */
3127 sym->st_shndx = SHN_UNDEF;
3128 }
3129 }
3130
3131 if (h->got.offset != (bfd_vma) -1
3132 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3133 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3134 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3135 {
3136 Elf_Internal_Rela rela;
3137 bfd_byte *loc;
3138
3139 /* This symbol has an entry in the global offset table. Set it
3140 up. */
3141 if (htab->sgot == NULL || htab->srelgot == NULL)
3142 abort ();
3143
3144 rela.r_offset = (htab->sgot->output_section->vma
3145 + htab->sgot->output_offset
3146 + (h->got.offset &~ (bfd_vma) 1));
3147
3148 /* If this is a static link, or it is a -Bsymbolic link and the
3149 symbol is defined locally or was forced to be local because
3150 of a version file, we just want to emit a RELATIVE reloc.
3151 The entry in the global offset table will already have been
3152 initialized in the relocate_section function. */
3153 if (info->shared
3154 && SYMBOL_REFERENCES_LOCAL (info, h))
3155 {
3156 if (!h->def_regular)
3157 return FALSE;
3158 BFD_ASSERT((h->got.offset & 1) != 0);
3159 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3160 rela.r_addend = (h->root.u.def.value
3161 + h->root.u.def.section->output_section->vma
3162 + h->root.u.def.section->output_offset);
3163 }
3164 else
3165 {
3166 BFD_ASSERT((h->got.offset & 1) == 0);
3167 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3168 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3169 rela.r_addend = 0;
3170 }
3171
3172 loc = htab->srelgot->contents;
3173 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3174 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3175 }
3176
3177 if (h->needs_copy)
3178 {
3179 Elf_Internal_Rela rela;
3180 bfd_byte *loc;
3181
3182 /* This symbols needs a copy reloc. Set it up. */
3183
3184 if (h->dynindx == -1
3185 || (h->root.type != bfd_link_hash_defined
3186 && h->root.type != bfd_link_hash_defweak)
3187 || htab->srelbss == NULL)
3188 abort ();
3189
3190 rela.r_offset = (h->root.u.def.value
3191 + h->root.u.def.section->output_section->vma
3192 + h->root.u.def.section->output_offset);
3193 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3194 rela.r_addend = 0;
3195 loc = htab->srelbss->contents;
3196 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3197 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3198 }
3199
3200 /* Mark some specially defined symbols as absolute. */
3201 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3202 || h == htab->elf.hgot
3203 || h == htab->elf.hplt)
3204 sym->st_shndx = SHN_ABS;
3205
3206 return TRUE;
3207 }
3208
3209 /* Used to decide how to sort relocs in an optimal manner for the
3210 dynamic linker, before writing them out. */
3211
3212 static enum elf_reloc_type_class
3213 elf_s390_reloc_type_class (rela)
3214 const Elf_Internal_Rela *rela;
3215 {
3216 switch ((int) ELF64_R_TYPE (rela->r_info))
3217 {
3218 case R_390_RELATIVE:
3219 return reloc_class_relative;
3220 case R_390_JMP_SLOT:
3221 return reloc_class_plt;
3222 case R_390_COPY:
3223 return reloc_class_copy;
3224 default:
3225 return reloc_class_normal;
3226 }
3227 }
3228
3229 /* Finish up the dynamic sections. */
3230
3231 static bfd_boolean
3232 elf_s390_finish_dynamic_sections (output_bfd, info)
3233 bfd *output_bfd;
3234 struct bfd_link_info *info;
3235 {
3236 struct elf_s390_link_hash_table *htab;
3237 bfd *dynobj;
3238 asection *sdyn;
3239
3240 htab = elf_s390_hash_table (info);
3241 dynobj = htab->elf.dynobj;
3242 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3243
3244 if (htab->elf.dynamic_sections_created)
3245 {
3246 Elf64_External_Dyn *dyncon, *dynconend;
3247
3248 if (sdyn == NULL || htab->sgot == NULL)
3249 abort ();
3250
3251 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3252 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3253 for (; dyncon < dynconend; dyncon++)
3254 {
3255 Elf_Internal_Dyn dyn;
3256 asection *s;
3257
3258 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3259
3260 switch (dyn.d_tag)
3261 {
3262 default:
3263 continue;
3264
3265 case DT_PLTGOT:
3266 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3267 break;
3268
3269 case DT_JMPREL:
3270 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3271 break;
3272
3273 case DT_PLTRELSZ:
3274 s = htab->srelplt->output_section;
3275 dyn.d_un.d_val = s->size;
3276 break;
3277
3278 case DT_RELASZ:
3279 /* The procedure linkage table relocs (DT_JMPREL) should
3280 not be included in the overall relocs (DT_RELA).
3281 Therefore, we override the DT_RELASZ entry here to
3282 make it not include the JMPREL relocs. Since the
3283 linker script arranges for .rela.plt to follow all
3284 other relocation sections, we don't have to worry
3285 about changing the DT_RELA entry. */
3286 s = htab->srelplt->output_section;
3287 dyn.d_un.d_val -= s->size;
3288 break;
3289 }
3290
3291 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3292 }
3293
3294 /* Fill in the special first entry in the procedure linkage table. */
3295 if (htab->splt && htab->splt->size > 0)
3296 {
3297 /* fill in blueprint for plt 0 entry */
3298 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3299 htab->splt->contents );
3300 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3301 htab->splt->contents +4 );
3302 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3303 htab->splt->contents +12 );
3304 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3305 htab->splt->contents +16 );
3306 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3307 htab->splt->contents +20 );
3308 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3309 htab->splt->contents + 24);
3310 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3311 htab->splt->contents + 28 );
3312 /* Fixup relative address to start of GOT */
3313 bfd_put_32 (output_bfd,
3314 (htab->sgotplt->output_section->vma +
3315 htab->sgotplt->output_offset
3316 - htab->splt->output_section->vma - 6)/2,
3317 htab->splt->contents + 8);
3318 }
3319 elf_section_data (htab->splt->output_section)
3320 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3321 }
3322
3323 if (htab->sgotplt)
3324 {
3325 /* Fill in the first three entries in the global offset table. */
3326 if (htab->sgotplt->size > 0)
3327 {
3328 bfd_put_64 (output_bfd,
3329 (sdyn == NULL ? (bfd_vma) 0
3330 : sdyn->output_section->vma + sdyn->output_offset),
3331 htab->sgotplt->contents);
3332 /* One entry for shared object struct ptr. */
3333 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3334 /* One entry for _dl_runtime_resolve. */
3335 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3336 }
3337
3338 elf_section_data (htab->sgot->output_section)
3339 ->this_hdr.sh_entsize = 8;
3340 }
3341 return TRUE;
3342 }
3343
3344 /* Return address for Ith PLT stub in section PLT, for relocation REL
3345 or (bfd_vma) -1 if it should not be included. */
3346
3347 static bfd_vma
3348 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3349 const arelent *rel ATTRIBUTE_UNUSED)
3350 {
3351 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3352 }
3353
3354
3355 /* Why was the hash table entry size definition changed from
3356 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3357 this is the only reason for the s390_elf64_size_info structure. */
3358
3359 const struct elf_size_info s390_elf64_size_info =
3360 {
3361 sizeof (Elf64_External_Ehdr),
3362 sizeof (Elf64_External_Phdr),
3363 sizeof (Elf64_External_Shdr),
3364 sizeof (Elf64_External_Rel),
3365 sizeof (Elf64_External_Rela),
3366 sizeof (Elf64_External_Sym),
3367 sizeof (Elf64_External_Dyn),
3368 sizeof (Elf_External_Note),
3369 8, /* hash-table entry size. */
3370 1, /* internal relocations per external relocations. */
3371 64, /* arch_size. */
3372 3, /* log_file_align. */
3373 ELFCLASS64, EV_CURRENT,
3374 bfd_elf64_write_out_phdrs,
3375 bfd_elf64_write_shdrs_and_ehdr,
3376 bfd_elf64_checksum_contents,
3377 bfd_elf64_write_relocs,
3378 bfd_elf64_swap_symbol_in,
3379 bfd_elf64_swap_symbol_out,
3380 bfd_elf64_slurp_reloc_table,
3381 bfd_elf64_slurp_symbol_table,
3382 bfd_elf64_swap_dyn_in,
3383 bfd_elf64_swap_dyn_out,
3384 bfd_elf64_swap_reloc_in,
3385 bfd_elf64_swap_reloc_out,
3386 bfd_elf64_swap_reloca_in,
3387 bfd_elf64_swap_reloca_out
3388 };
3389
3390 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3391 #define TARGET_BIG_NAME "elf64-s390"
3392 #define ELF_ARCH bfd_arch_s390
3393 #define ELF_MACHINE_CODE EM_S390
3394 #define ELF_MACHINE_ALT1 EM_S390_OLD
3395 #define ELF_MAXPAGESIZE 0x1000
3396
3397 #define elf_backend_size_info s390_elf64_size_info
3398
3399 #define elf_backend_can_gc_sections 1
3400 #define elf_backend_can_refcount 1
3401 #define elf_backend_want_got_plt 1
3402 #define elf_backend_plt_readonly 1
3403 #define elf_backend_want_plt_sym 0
3404 #define elf_backend_got_header_size 24
3405 #define elf_backend_rela_normal 1
3406
3407 #define elf_info_to_howto elf_s390_info_to_howto
3408
3409 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3410 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3411 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3412 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3413
3414 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3415 #define elf_backend_check_relocs elf_s390_check_relocs
3416 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3417 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3418 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3419 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3420 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3421 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3422 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3423 #define elf_backend_relocate_section elf_s390_relocate_section
3424 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3425 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3426 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3427 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3428
3429 #define bfd_elf64_mkobject elf_s390_mkobject
3430 #define elf_backend_object_p elf_s390_object_p
3431
3432 #include "elf64-target.h"
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