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[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
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 if (!htab->sgot || !htab->sgotplt)
780 abort ();
781
782 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
783 (SEC_ALLOC | SEC_LOAD
784 | SEC_HAS_CONTENTS
785 | SEC_IN_MEMORY
786 | SEC_LINKER_CREATED
787 | SEC_READONLY));
788 if (htab->srelgot == NULL
789 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
790 return FALSE;
791 return TRUE;
792 }
793
794 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
795 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
796 hash table. */
797
798 static bfd_boolean
799 elf_s390_create_dynamic_sections (dynobj, info)
800 bfd *dynobj;
801 struct bfd_link_info *info;
802 {
803 struct elf_s390_link_hash_table *htab;
804
805 htab = elf_s390_hash_table (info);
806 if (!htab->sgot && !create_got_section (dynobj, info))
807 return FALSE;
808
809 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
810 return FALSE;
811
812 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
813 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
814 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
815 if (!info->shared)
816 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
817
818 if (!htab->splt || !htab->srelplt || !htab->sdynbss
819 || (!info->shared && !htab->srelbss))
820 abort ();
821
822 return TRUE;
823 }
824
825 /* Copy the extra info we tack onto an elf_link_hash_entry. */
826
827 static void
828 elf_s390_copy_indirect_symbol (info, dir, ind)
829 struct bfd_link_info *info;
830 struct elf_link_hash_entry *dir, *ind;
831 {
832 struct elf_s390_link_hash_entry *edir, *eind;
833
834 edir = (struct elf_s390_link_hash_entry *) dir;
835 eind = (struct elf_s390_link_hash_entry *) ind;
836
837 if (eind->dyn_relocs != NULL)
838 {
839 if (edir->dyn_relocs != NULL)
840 {
841 struct elf_s390_dyn_relocs **pp;
842 struct elf_s390_dyn_relocs *p;
843
844 /* Add reloc counts against the indirect sym to the direct sym
845 list. Merge any entries against the same section. */
846 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
847 {
848 struct elf_s390_dyn_relocs *q;
849
850 for (q = edir->dyn_relocs; q != NULL; q = q->next)
851 if (q->sec == p->sec)
852 {
853 q->pc_count += p->pc_count;
854 q->count += p->count;
855 *pp = p->next;
856 break;
857 }
858 if (q == NULL)
859 pp = &p->next;
860 }
861 *pp = edir->dyn_relocs;
862 }
863
864 edir->dyn_relocs = eind->dyn_relocs;
865 eind->dyn_relocs = NULL;
866 }
867
868 if (ind->root.type == bfd_link_hash_indirect
869 && dir->got.refcount <= 0)
870 {
871 edir->tls_type = eind->tls_type;
872 eind->tls_type = GOT_UNKNOWN;
873 }
874
875 if (ELIMINATE_COPY_RELOCS
876 && ind->root.type != bfd_link_hash_indirect
877 && dir->dynamic_adjusted)
878 {
879 /* If called to transfer flags for a weakdef during processing
880 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
881 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
882 dir->ref_dynamic |= ind->ref_dynamic;
883 dir->ref_regular |= ind->ref_regular;
884 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
885 dir->needs_plt |= ind->needs_plt;
886 }
887 else
888 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
889 }
890
891 static int
892 elf_s390_tls_transition (info, r_type, is_local)
893 struct bfd_link_info *info;
894 int r_type;
895 int is_local;
896 {
897 if (info->shared)
898 return r_type;
899
900 switch (r_type)
901 {
902 case R_390_TLS_GD64:
903 case R_390_TLS_IE64:
904 if (is_local)
905 return R_390_TLS_LE64;
906 return R_390_TLS_IE64;
907 case R_390_TLS_GOTIE64:
908 if (is_local)
909 return R_390_TLS_LE64;
910 return R_390_TLS_GOTIE64;
911 case R_390_TLS_LDM64:
912 return R_390_TLS_LE64;
913 }
914
915 return r_type;
916 }
917
918 /* Look through the relocs for a section during the first phase, and
919 allocate space in the global offset table or procedure linkage
920 table. */
921
922 static bfd_boolean
923 elf_s390_check_relocs (abfd, info, sec, relocs)
924 bfd *abfd;
925 struct bfd_link_info *info;
926 asection *sec;
927 const Elf_Internal_Rela *relocs;
928 {
929 struct elf_s390_link_hash_table *htab;
930 Elf_Internal_Shdr *symtab_hdr;
931 struct elf_link_hash_entry **sym_hashes;
932 const Elf_Internal_Rela *rel;
933 const Elf_Internal_Rela *rel_end;
934 asection *sreloc;
935 bfd_signed_vma *local_got_refcounts;
936 int tls_type, old_tls_type;
937
938 if (info->relocatable)
939 return TRUE;
940
941 BFD_ASSERT (is_s390_elf (abfd));
942
943 htab = elf_s390_hash_table (info);
944 symtab_hdr = &elf_symtab_hdr (abfd);
945 sym_hashes = elf_sym_hashes (abfd);
946 local_got_refcounts = elf_local_got_refcounts (abfd);
947
948 sreloc = NULL;
949
950 rel_end = relocs + sec->reloc_count;
951 for (rel = relocs; rel < rel_end; rel++)
952 {
953 unsigned int r_type;
954 unsigned long r_symndx;
955 struct elf_link_hash_entry *h;
956
957 r_symndx = ELF64_R_SYM (rel->r_info);
958
959 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
960 {
961 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
962 abfd,
963 r_symndx);
964 return FALSE;
965 }
966
967 if (r_symndx < symtab_hdr->sh_info)
968 h = NULL;
969 else
970 {
971 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
972 while (h->root.type == bfd_link_hash_indirect
973 || h->root.type == bfd_link_hash_warning)
974 h = (struct elf_link_hash_entry *) h->root.u.i.link;
975 }
976
977 /* Create got section and local_got_refcounts array if they
978 are needed. */
979 r_type = elf_s390_tls_transition (info,
980 ELF64_R_TYPE (rel->r_info),
981 h == NULL);
982 switch (r_type)
983 {
984 case R_390_GOT12:
985 case R_390_GOT16:
986 case R_390_GOT20:
987 case R_390_GOT32:
988 case R_390_GOT64:
989 case R_390_GOTENT:
990 case R_390_GOTPLT12:
991 case R_390_GOTPLT16:
992 case R_390_GOTPLT20:
993 case R_390_GOTPLT32:
994 case R_390_GOTPLT64:
995 case R_390_GOTPLTENT:
996 case R_390_TLS_GD64:
997 case R_390_TLS_GOTIE12:
998 case R_390_TLS_GOTIE20:
999 case R_390_TLS_GOTIE64:
1000 case R_390_TLS_IEENT:
1001 case R_390_TLS_IE64:
1002 case R_390_TLS_LDM64:
1003 if (h == NULL
1004 && local_got_refcounts == NULL)
1005 {
1006 bfd_size_type size;
1007
1008 size = symtab_hdr->sh_info;
1009 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1010 local_got_refcounts = ((bfd_signed_vma *)
1011 bfd_zalloc (abfd, size));
1012 if (local_got_refcounts == NULL)
1013 return FALSE;
1014 elf_local_got_refcounts (abfd) = local_got_refcounts;
1015 elf_s390_local_got_tls_type (abfd)
1016 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1017 }
1018 /* Fall through. */
1019 case R_390_GOTOFF16:
1020 case R_390_GOTOFF32:
1021 case R_390_GOTOFF64:
1022 case R_390_GOTPC:
1023 case R_390_GOTPCDBL:
1024 if (htab->sgot == NULL)
1025 {
1026 if (htab->elf.dynobj == NULL)
1027 htab->elf.dynobj = abfd;
1028 if (!create_got_section (htab->elf.dynobj, info))
1029 return FALSE;
1030 }
1031 }
1032
1033 switch (r_type)
1034 {
1035 case R_390_GOTOFF16:
1036 case R_390_GOTOFF32:
1037 case R_390_GOTOFF64:
1038 case R_390_GOTPC:
1039 case R_390_GOTPCDBL:
1040 /* Got is created, nothing to be done. */
1041 break;
1042
1043 case R_390_PLT16DBL:
1044 case R_390_PLT32:
1045 case R_390_PLT32DBL:
1046 case R_390_PLT64:
1047 case R_390_PLTOFF16:
1048 case R_390_PLTOFF32:
1049 case R_390_PLTOFF64:
1050 /* This symbol requires a procedure linkage table entry. We
1051 actually build the entry in adjust_dynamic_symbol,
1052 because this might be a case of linking PIC code which is
1053 never referenced by a dynamic object, in which case we
1054 don't need to generate a procedure linkage table entry
1055 after all. */
1056
1057 /* If this is a local symbol, we resolve it directly without
1058 creating a procedure linkage table entry. */
1059 if (h != NULL)
1060 {
1061 h->needs_plt = 1;
1062 h->plt.refcount += 1;
1063 }
1064 break;
1065
1066 case R_390_GOTPLT12:
1067 case R_390_GOTPLT16:
1068 case R_390_GOTPLT20:
1069 case R_390_GOTPLT32:
1070 case R_390_GOTPLT64:
1071 case R_390_GOTPLTENT:
1072 /* This symbol requires either a procedure linkage table entry
1073 or an entry in the local got. We actually build the entry
1074 in adjust_dynamic_symbol because whether this is really a
1075 global reference can change and with it the fact if we have
1076 to create a plt entry or a local got entry. To be able to
1077 make a once global symbol a local one we have to keep track
1078 of the number of gotplt references that exist for this
1079 symbol. */
1080 if (h != NULL)
1081 {
1082 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1083 h->needs_plt = 1;
1084 h->plt.refcount += 1;
1085 }
1086 else
1087 local_got_refcounts[r_symndx] += 1;
1088 break;
1089
1090 case R_390_TLS_LDM64:
1091 htab->tls_ldm_got.refcount += 1;
1092 break;
1093
1094 case R_390_TLS_IE64:
1095 case R_390_TLS_GOTIE12:
1096 case R_390_TLS_GOTIE20:
1097 case R_390_TLS_GOTIE64:
1098 case R_390_TLS_IEENT:
1099 if (info->shared)
1100 info->flags |= DF_STATIC_TLS;
1101 /* Fall through */
1102
1103 case R_390_GOT12:
1104 case R_390_GOT16:
1105 case R_390_GOT20:
1106 case R_390_GOT32:
1107 case R_390_GOT64:
1108 case R_390_GOTENT:
1109 case R_390_TLS_GD64:
1110 /* This symbol requires a global offset table entry. */
1111 switch (r_type)
1112 {
1113 default:
1114 case R_390_GOT12:
1115 case R_390_GOT16:
1116 case R_390_GOT20:
1117 case R_390_GOT32:
1118 case R_390_GOTENT:
1119 tls_type = GOT_NORMAL;
1120 break;
1121 case R_390_TLS_GD64:
1122 tls_type = GOT_TLS_GD;
1123 break;
1124 case R_390_TLS_IE64:
1125 case R_390_TLS_GOTIE64:
1126 tls_type = GOT_TLS_IE;
1127 break;
1128 case R_390_TLS_GOTIE12:
1129 case R_390_TLS_GOTIE20:
1130 case R_390_TLS_IEENT:
1131 tls_type = GOT_TLS_IE_NLT;
1132 break;
1133 }
1134
1135 if (h != NULL)
1136 {
1137 h->got.refcount += 1;
1138 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1139 }
1140 else
1141 {
1142 local_got_refcounts[r_symndx] += 1;
1143 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1144 }
1145 /* If a TLS symbol is accessed using IE at least once,
1146 there is no point to use dynamic model for it. */
1147 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1148 {
1149 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1150 {
1151 (*_bfd_error_handler)
1152 (_("%B: `%s' accessed both as normal and thread local symbol"),
1153 abfd, h->root.root.string);
1154 return FALSE;
1155 }
1156 if (old_tls_type > tls_type)
1157 tls_type = old_tls_type;
1158 }
1159
1160 if (old_tls_type != tls_type)
1161 {
1162 if (h != NULL)
1163 elf_s390_hash_entry (h)->tls_type = tls_type;
1164 else
1165 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1166 }
1167
1168 if (r_type != R_390_TLS_IE64)
1169 break;
1170 /* Fall through */
1171
1172 case R_390_TLS_LE64:
1173 if (!info->shared)
1174 break;
1175 info->flags |= DF_STATIC_TLS;
1176 /* Fall through */
1177
1178 case R_390_8:
1179 case R_390_16:
1180 case R_390_32:
1181 case R_390_64:
1182 case R_390_PC16:
1183 case R_390_PC16DBL:
1184 case R_390_PC32:
1185 case R_390_PC32DBL:
1186 case R_390_PC64:
1187 if (h != NULL && !info->shared)
1188 {
1189 /* If this reloc is in a read-only section, we might
1190 need a copy reloc. We can't check reliably at this
1191 stage whether the section is read-only, as input
1192 sections have not yet been mapped to output sections.
1193 Tentatively set the flag for now, and correct in
1194 adjust_dynamic_symbol. */
1195 h->non_got_ref = 1;
1196
1197 /* We may need a .plt entry if the function this reloc
1198 refers to is in a shared lib. */
1199 h->plt.refcount += 1;
1200 }
1201
1202 /* If we are creating a shared library, and this is a reloc
1203 against a global symbol, or a non PC relative reloc
1204 against a local symbol, then we need to copy the reloc
1205 into the shared library. However, if we are linking with
1206 -Bsymbolic, we do not need to copy a reloc against a
1207 global symbol which is defined in an object we are
1208 including in the link (i.e., DEF_REGULAR is set). At
1209 this point we have not seen all the input files, so it is
1210 possible that DEF_REGULAR is not set now but will be set
1211 later (it is never cleared). In case of a weak definition,
1212 DEF_REGULAR may be cleared later by a strong definition in
1213 a shared library. We account for that possibility below by
1214 storing information in the relocs_copied field of the hash
1215 table entry. A similar situation occurs when creating
1216 shared libraries and symbol visibility changes render the
1217 symbol local.
1218
1219 If on the other hand, we are creating an executable, we
1220 may need to keep relocations for symbols satisfied by a
1221 dynamic library if we manage to avoid copy relocs for the
1222 symbol. */
1223 if ((info->shared
1224 && (sec->flags & SEC_ALLOC) != 0
1225 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1226 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1227 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1228 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1229 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1230 || (h != NULL
1231 && (! info->symbolic
1232 || h->root.type == bfd_link_hash_defweak
1233 || !h->def_regular))))
1234 || (ELIMINATE_COPY_RELOCS
1235 && !info->shared
1236 && (sec->flags & SEC_ALLOC) != 0
1237 && h != NULL
1238 && (h->root.type == bfd_link_hash_defweak
1239 || !h->def_regular)))
1240 {
1241 struct elf_s390_dyn_relocs *p;
1242 struct elf_s390_dyn_relocs **head;
1243
1244 /* We must copy these reloc types into the output file.
1245 Create a reloc section in dynobj and make room for
1246 this reloc. */
1247 if (sreloc == NULL)
1248 {
1249 if (htab->elf.dynobj == NULL)
1250 htab->elf.dynobj = abfd;
1251
1252 sreloc = _bfd_elf_make_dynamic_reloc_section
1253 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1254
1255 if (sreloc == NULL)
1256 return FALSE;
1257 }
1258
1259 /* If this is a global symbol, we count the number of
1260 relocations we need for this symbol. */
1261 if (h != NULL)
1262 {
1263 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1264 }
1265 else
1266 {
1267 /* Track dynamic relocs needed for local syms too.
1268 We really need local syms available to do this
1269 easily. Oh well. */
1270
1271 asection *s;
1272 void *vpp;
1273
1274 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1275 sec, r_symndx);
1276 if (s == NULL)
1277 return FALSE;
1278
1279 vpp = &elf_section_data (s)->local_dynrel;
1280 head = (struct elf_s390_dyn_relocs **) vpp;
1281 }
1282
1283 p = *head;
1284 if (p == NULL || p->sec != sec)
1285 {
1286 bfd_size_type amt = sizeof *p;
1287 p = ((struct elf_s390_dyn_relocs *)
1288 bfd_alloc (htab->elf.dynobj, amt));
1289 if (p == NULL)
1290 return FALSE;
1291 p->next = *head;
1292 *head = p;
1293 p->sec = sec;
1294 p->count = 0;
1295 p->pc_count = 0;
1296 }
1297
1298 p->count += 1;
1299 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1300 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1301 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1302 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1303 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1304 p->pc_count += 1;
1305 }
1306 break;
1307
1308 /* This relocation describes the C++ object vtable hierarchy.
1309 Reconstruct it for later use during GC. */
1310 case R_390_GNU_VTINHERIT:
1311 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1312 return FALSE;
1313 break;
1314
1315 /* This relocation describes which C++ vtable entries are actually
1316 used. Record for later use during GC. */
1317 case R_390_GNU_VTENTRY:
1318 BFD_ASSERT (h != NULL);
1319 if (h != NULL
1320 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1321 return FALSE;
1322 break;
1323
1324 default:
1325 break;
1326 }
1327 }
1328
1329 return TRUE;
1330 }
1331
1332 /* Return the section that should be marked against GC for a given
1333 relocation. */
1334
1335 static asection *
1336 elf_s390_gc_mark_hook (asection *sec,
1337 struct bfd_link_info *info,
1338 Elf_Internal_Rela *rel,
1339 struct elf_link_hash_entry *h,
1340 Elf_Internal_Sym *sym)
1341 {
1342 if (h != NULL)
1343 switch (ELF64_R_TYPE (rel->r_info))
1344 {
1345 case R_390_GNU_VTINHERIT:
1346 case R_390_GNU_VTENTRY:
1347 return NULL;
1348 }
1349
1350 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1351 }
1352
1353 /* Update the got entry reference counts for the section being removed. */
1354
1355 static bfd_boolean
1356 elf_s390_gc_sweep_hook (bfd *abfd,
1357 struct bfd_link_info *info,
1358 asection *sec,
1359 const Elf_Internal_Rela *relocs)
1360 {
1361 Elf_Internal_Shdr *symtab_hdr;
1362 struct elf_link_hash_entry **sym_hashes;
1363 bfd_signed_vma *local_got_refcounts;
1364 const Elf_Internal_Rela *rel, *relend;
1365
1366 if (info->relocatable)
1367 return TRUE;
1368
1369 elf_section_data (sec)->local_dynrel = NULL;
1370
1371 symtab_hdr = &elf_symtab_hdr (abfd);
1372 sym_hashes = elf_sym_hashes (abfd);
1373 local_got_refcounts = elf_local_got_refcounts (abfd);
1374
1375 relend = relocs + sec->reloc_count;
1376 for (rel = relocs; rel < relend; rel++)
1377 {
1378 unsigned long r_symndx;
1379 unsigned int r_type;
1380 struct elf_link_hash_entry *h = NULL;
1381
1382 r_symndx = ELF64_R_SYM (rel->r_info);
1383 if (r_symndx >= symtab_hdr->sh_info)
1384 {
1385 struct elf_s390_link_hash_entry *eh;
1386 struct elf_s390_dyn_relocs **pp;
1387 struct elf_s390_dyn_relocs *p;
1388
1389 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1390 while (h->root.type == bfd_link_hash_indirect
1391 || h->root.type == bfd_link_hash_warning)
1392 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1393 eh = (struct elf_s390_link_hash_entry *) h;
1394
1395 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1396 if (p->sec == sec)
1397 {
1398 /* Everything must go for SEC. */
1399 *pp = p->next;
1400 break;
1401 }
1402 }
1403
1404 r_type = ELF64_R_TYPE (rel->r_info);
1405 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1406 switch (r_type)
1407 {
1408 case R_390_TLS_LDM64:
1409 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1410 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1411 break;
1412
1413 case R_390_TLS_GD64:
1414 case R_390_TLS_IE64:
1415 case R_390_TLS_GOTIE12:
1416 case R_390_TLS_GOTIE20:
1417 case R_390_TLS_GOTIE64:
1418 case R_390_TLS_IEENT:
1419 case R_390_GOT12:
1420 case R_390_GOT16:
1421 case R_390_GOT20:
1422 case R_390_GOT32:
1423 case R_390_GOT64:
1424 case R_390_GOTOFF16:
1425 case R_390_GOTOFF32:
1426 case R_390_GOTOFF64:
1427 case R_390_GOTPC:
1428 case R_390_GOTPCDBL:
1429 case R_390_GOTENT:
1430 if (h != NULL)
1431 {
1432 if (h->got.refcount > 0)
1433 h->got.refcount -= 1;
1434 }
1435 else if (local_got_refcounts != NULL)
1436 {
1437 if (local_got_refcounts[r_symndx] > 0)
1438 local_got_refcounts[r_symndx] -= 1;
1439 }
1440 break;
1441
1442 case R_390_8:
1443 case R_390_12:
1444 case R_390_16:
1445 case R_390_20:
1446 case R_390_32:
1447 case R_390_64:
1448 case R_390_PC16:
1449 case R_390_PC16DBL:
1450 case R_390_PC32:
1451 case R_390_PC32DBL:
1452 case R_390_PC64:
1453 if (info->shared)
1454 break;
1455 /* Fall through */
1456
1457 case R_390_PLT16DBL:
1458 case R_390_PLT32:
1459 case R_390_PLT32DBL:
1460 case R_390_PLT64:
1461 case R_390_PLTOFF16:
1462 case R_390_PLTOFF32:
1463 case R_390_PLTOFF64:
1464 if (h != NULL)
1465 {
1466 if (h->plt.refcount > 0)
1467 h->plt.refcount -= 1;
1468 }
1469 break;
1470
1471 case R_390_GOTPLT12:
1472 case R_390_GOTPLT16:
1473 case R_390_GOTPLT20:
1474 case R_390_GOTPLT32:
1475 case R_390_GOTPLT64:
1476 case R_390_GOTPLTENT:
1477 if (h != NULL)
1478 {
1479 if (h->plt.refcount > 0)
1480 {
1481 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1482 h->plt.refcount -= 1;
1483 }
1484 }
1485 else if (local_got_refcounts != NULL)
1486 {
1487 if (local_got_refcounts[r_symndx] > 0)
1488 local_got_refcounts[r_symndx] -= 1;
1489 }
1490 break;
1491
1492 default:
1493 break;
1494 }
1495 }
1496
1497 return TRUE;
1498 }
1499
1500 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1501 entry but we found we will not create any. Called when we find we will
1502 not have any PLT for this symbol, by for example
1503 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1504 or elf_s390_size_dynamic_sections if no dynamic sections will be
1505 created (we're only linking static objects). */
1506
1507 static void
1508 elf_s390_adjust_gotplt (h)
1509 struct elf_s390_link_hash_entry *h;
1510 {
1511 if (h->elf.root.type == bfd_link_hash_warning)
1512 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1513
1514 if (h->gotplt_refcount <= 0)
1515 return;
1516
1517 /* We simply add the number of gotplt references to the number
1518 * of got references for this symbol. */
1519 h->elf.got.refcount += h->gotplt_refcount;
1520 h->gotplt_refcount = -1;
1521 }
1522
1523 /* Adjust a symbol defined by a dynamic object and referenced by a
1524 regular object. The current definition is in some section of the
1525 dynamic object, but we're not including those sections. We have to
1526 change the definition to something the rest of the link can
1527 understand. */
1528
1529 static bfd_boolean
1530 elf_s390_adjust_dynamic_symbol (info, h)
1531 struct bfd_link_info *info;
1532 struct elf_link_hash_entry *h;
1533 {
1534 struct elf_s390_link_hash_table *htab;
1535 asection *s;
1536
1537 /* If this is a function, put it in the procedure linkage table. We
1538 will fill in the contents of the procedure linkage table later
1539 (although we could actually do it here). */
1540 if (h->type == STT_FUNC
1541 || h->needs_plt)
1542 {
1543 if (h->plt.refcount <= 0
1544 || (! info->shared
1545 && !h->def_dynamic
1546 && !h->ref_dynamic
1547 && h->root.type != bfd_link_hash_undefweak
1548 && h->root.type != bfd_link_hash_undefined))
1549 {
1550 /* This case can occur if we saw a PLT32 reloc in an input
1551 file, but the symbol was never referred to by a dynamic
1552 object, or if all references were garbage collected. In
1553 such a case, we don't actually need to build a procedure
1554 linkage table, and we can just do a PC32 reloc instead. */
1555 h->plt.offset = (bfd_vma) -1;
1556 h->needs_plt = 0;
1557 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1558 }
1559
1560 return TRUE;
1561 }
1562 else
1563 /* It's possible that we incorrectly decided a .plt reloc was
1564 needed for an R_390_PC32 reloc to a non-function sym in
1565 check_relocs. We can't decide accurately between function and
1566 non-function syms in check-relocs; Objects loaded later in
1567 the link may change h->type. So fix it now. */
1568 h->plt.offset = (bfd_vma) -1;
1569
1570 /* If this is a weak symbol, and there is a real definition, the
1571 processor independent code will have arranged for us to see the
1572 real definition first, and we can just use the same value. */
1573 if (h->u.weakdef != NULL)
1574 {
1575 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1576 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1577 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1578 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1579 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1580 h->non_got_ref = h->u.weakdef->non_got_ref;
1581 return TRUE;
1582 }
1583
1584 /* This is a reference to a symbol defined by a dynamic object which
1585 is not a function. */
1586
1587 /* If we are creating a shared library, we must presume that the
1588 only references to the symbol are via the global offset table.
1589 For such cases we need not do anything here; the relocations will
1590 be handled correctly by relocate_section. */
1591 if (info->shared)
1592 return TRUE;
1593
1594 /* If there are no references to this symbol that do not use the
1595 GOT, we don't need to generate a copy reloc. */
1596 if (!h->non_got_ref)
1597 return TRUE;
1598
1599 /* If -z nocopyreloc was given, we won't generate them either. */
1600 if (info->nocopyreloc)
1601 {
1602 h->non_got_ref = 0;
1603 return TRUE;
1604 }
1605
1606 if (ELIMINATE_COPY_RELOCS)
1607 {
1608 struct elf_s390_link_hash_entry * eh;
1609 struct elf_s390_dyn_relocs *p;
1610
1611 eh = (struct elf_s390_link_hash_entry *) h;
1612 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1613 {
1614 s = p->sec->output_section;
1615 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1616 break;
1617 }
1618
1619 /* If we didn't find any dynamic relocs in read-only sections, then
1620 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1621 if (p == NULL)
1622 {
1623 h->non_got_ref = 0;
1624 return TRUE;
1625 }
1626 }
1627
1628 if (h->size == 0)
1629 {
1630 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1631 h->root.root.string);
1632 return TRUE;
1633 }
1634
1635 /* We must allocate the symbol in our .dynbss section, which will
1636 become part of the .bss section of the executable. There will be
1637 an entry for this symbol in the .dynsym section. The dynamic
1638 object will contain position independent code, so all references
1639 from the dynamic object to this symbol will go through the global
1640 offset table. The dynamic linker will use the .dynsym entry to
1641 determine the address it must put in the global offset table, so
1642 both the dynamic object and the regular object will refer to the
1643 same memory location for the variable. */
1644
1645 htab = elf_s390_hash_table (info);
1646
1647 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1648 copy the initial value out of the dynamic object and into the
1649 runtime process image. */
1650 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1651 {
1652 htab->srelbss->size += sizeof (Elf64_External_Rela);
1653 h->needs_copy = 1;
1654 }
1655
1656 s = htab->sdynbss;
1657
1658 return _bfd_elf_adjust_dynamic_copy (h, s);
1659 }
1660
1661 /* Allocate space in .plt, .got and associated reloc sections for
1662 dynamic relocs. */
1663
1664 static bfd_boolean
1665 allocate_dynrelocs (h, inf)
1666 struct elf_link_hash_entry *h;
1667 PTR inf;
1668 {
1669 struct bfd_link_info *info;
1670 struct elf_s390_link_hash_table *htab;
1671 struct elf_s390_link_hash_entry *eh;
1672 struct elf_s390_dyn_relocs *p;
1673
1674 if (h->root.type == bfd_link_hash_indirect)
1675 return TRUE;
1676
1677 if (h->root.type == bfd_link_hash_warning)
1678 /* When warning symbols are created, they **replace** the "real"
1679 entry in the hash table, thus we never get to see the real
1680 symbol in a hash traversal. So look at it now. */
1681 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1682
1683 info = (struct bfd_link_info *) inf;
1684 htab = elf_s390_hash_table (info);
1685
1686 if (htab->elf.dynamic_sections_created
1687 && h->plt.refcount > 0
1688 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1689 || h->root.type != bfd_link_hash_undefweak))
1690 {
1691 /* Make sure this symbol is output as a dynamic symbol.
1692 Undefined weak syms won't yet be marked as dynamic. */
1693 if (h->dynindx == -1
1694 && !h->forced_local)
1695 {
1696 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1697 return FALSE;
1698 }
1699
1700 if (info->shared
1701 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1702 {
1703 asection *s = htab->splt;
1704
1705 /* If this is the first .plt entry, make room for the special
1706 first entry. */
1707 if (s->size == 0)
1708 s->size += PLT_FIRST_ENTRY_SIZE;
1709
1710 h->plt.offset = s->size;
1711
1712 /* If this symbol is not defined in a regular file, and we are
1713 not generating a shared library, then set the symbol to this
1714 location in the .plt. This is required to make function
1715 pointers compare as equal between the normal executable and
1716 the shared library. */
1717 if (! info->shared
1718 && !h->def_regular)
1719 {
1720 h->root.u.def.section = s;
1721 h->root.u.def.value = h->plt.offset;
1722 }
1723
1724 /* Make room for this entry. */
1725 s->size += PLT_ENTRY_SIZE;
1726
1727 /* We also need to make an entry in the .got.plt section, which
1728 will be placed in the .got section by the linker script. */
1729 htab->sgotplt->size += GOT_ENTRY_SIZE;
1730
1731 /* We also need to make an entry in the .rela.plt section. */
1732 htab->srelplt->size += sizeof (Elf64_External_Rela);
1733 }
1734 else
1735 {
1736 h->plt.offset = (bfd_vma) -1;
1737 h->needs_plt = 0;
1738 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1739 }
1740 }
1741 else
1742 {
1743 h->plt.offset = (bfd_vma) -1;
1744 h->needs_plt = 0;
1745 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1746 }
1747
1748 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1749 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1750 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1751 we can save the dynamic TLS relocation. */
1752 if (h->got.refcount > 0
1753 && !info->shared
1754 && h->dynindx == -1
1755 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1756 {
1757 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1758 /* For the GOTIE access without a literal pool entry the offset has
1759 to be stored somewhere. The immediate value in the instruction
1760 is not bit enough so the value is stored in the got. */
1761 {
1762 h->got.offset = htab->sgot->size;
1763 htab->sgot->size += GOT_ENTRY_SIZE;
1764 }
1765 else
1766 h->got.offset = (bfd_vma) -1;
1767 }
1768 else if (h->got.refcount > 0)
1769 {
1770 asection *s;
1771 bfd_boolean dyn;
1772 int tls_type = elf_s390_hash_entry(h)->tls_type;
1773
1774 /* Make sure this symbol is output as a dynamic symbol.
1775 Undefined weak syms won't yet be marked as dynamic. */
1776 if (h->dynindx == -1
1777 && !h->forced_local)
1778 {
1779 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1780 return FALSE;
1781 }
1782
1783 s = htab->sgot;
1784 h->got.offset = s->size;
1785 s->size += GOT_ENTRY_SIZE;
1786 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1787 if (tls_type == GOT_TLS_GD)
1788 s->size += GOT_ENTRY_SIZE;
1789 dyn = htab->elf.dynamic_sections_created;
1790 /* R_390_TLS_IE64 needs one dynamic relocation,
1791 R_390_TLS_GD64 needs one if local symbol and two if global. */
1792 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1793 || tls_type >= GOT_TLS_IE)
1794 htab->srelgot->size += sizeof (Elf64_External_Rela);
1795 else if (tls_type == GOT_TLS_GD)
1796 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1797 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1798 || h->root.type != bfd_link_hash_undefweak)
1799 && (info->shared
1800 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1801 htab->srelgot->size += sizeof (Elf64_External_Rela);
1802 }
1803 else
1804 h->got.offset = (bfd_vma) -1;
1805
1806 eh = (struct elf_s390_link_hash_entry *) h;
1807 if (eh->dyn_relocs == NULL)
1808 return TRUE;
1809
1810 /* In the shared -Bsymbolic case, discard space allocated for
1811 dynamic pc-relative relocs against symbols which turn out to be
1812 defined in regular objects. For the normal shared case, discard
1813 space for pc-relative relocs that have become local due to symbol
1814 visibility changes. */
1815
1816 if (info->shared)
1817 {
1818 if (SYMBOL_REFERENCES_LOCAL (info, h))
1819 {
1820 struct elf_s390_dyn_relocs **pp;
1821
1822 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1823 {
1824 p->count -= p->pc_count;
1825 p->pc_count = 0;
1826 if (p->count == 0)
1827 *pp = p->next;
1828 else
1829 pp = &p->next;
1830 }
1831 }
1832
1833 /* Also discard relocs on undefined weak syms with non-default
1834 visibility. */
1835 if (eh->dyn_relocs != NULL
1836 && h->root.type == bfd_link_hash_undefweak)
1837 {
1838 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1839 eh->dyn_relocs = NULL;
1840
1841 /* Make sure undefined weak symbols are output as a dynamic
1842 symbol in PIEs. */
1843 else if (h->dynindx == -1
1844 && !h->forced_local)
1845 {
1846 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1847 return FALSE;
1848 }
1849 }
1850 }
1851 else if (ELIMINATE_COPY_RELOCS)
1852 {
1853 /* For the non-shared case, discard space for relocs against
1854 symbols which turn out to need copy relocs or are not
1855 dynamic. */
1856
1857 if (!h->non_got_ref
1858 && ((h->def_dynamic
1859 && !h->def_regular)
1860 || (htab->elf.dynamic_sections_created
1861 && (h->root.type == bfd_link_hash_undefweak
1862 || h->root.type == bfd_link_hash_undefined))))
1863 {
1864 /* Make sure this symbol is output as a dynamic symbol.
1865 Undefined weak syms won't yet be marked as dynamic. */
1866 if (h->dynindx == -1
1867 && !h->forced_local)
1868 {
1869 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1870 return FALSE;
1871 }
1872
1873 /* If that succeeded, we know we'll be keeping all the
1874 relocs. */
1875 if (h->dynindx != -1)
1876 goto keep;
1877 }
1878
1879 eh->dyn_relocs = NULL;
1880
1881 keep: ;
1882 }
1883
1884 /* Finally, allocate space. */
1885 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1886 {
1887 asection *sreloc = elf_section_data (p->sec)->sreloc;
1888 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1889 }
1890
1891 return TRUE;
1892 }
1893
1894 /* Find any dynamic relocs that apply to read-only sections. */
1895
1896 static bfd_boolean
1897 readonly_dynrelocs (h, inf)
1898 struct elf_link_hash_entry *h;
1899 PTR inf;
1900 {
1901 struct elf_s390_link_hash_entry *eh;
1902 struct elf_s390_dyn_relocs *p;
1903
1904 if (h->root.type == bfd_link_hash_warning)
1905 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1906
1907 eh = (struct elf_s390_link_hash_entry *) h;
1908 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1909 {
1910 asection *s = p->sec->output_section;
1911
1912 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1913 {
1914 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1915
1916 info->flags |= DF_TEXTREL;
1917
1918 /* Not an error, just cut short the traversal. */
1919 return FALSE;
1920 }
1921 }
1922 return TRUE;
1923 }
1924
1925 /* Set the sizes of the dynamic sections. */
1926
1927 static bfd_boolean
1928 elf_s390_size_dynamic_sections (output_bfd, info)
1929 bfd *output_bfd ATTRIBUTE_UNUSED;
1930 struct bfd_link_info *info;
1931 {
1932 struct elf_s390_link_hash_table *htab;
1933 bfd *dynobj;
1934 asection *s;
1935 bfd_boolean relocs;
1936 bfd *ibfd;
1937
1938 htab = elf_s390_hash_table (info);
1939 dynobj = htab->elf.dynobj;
1940 if (dynobj == NULL)
1941 abort ();
1942
1943 if (htab->elf.dynamic_sections_created)
1944 {
1945 /* Set the contents of the .interp section to the interpreter. */
1946 if (info->executable)
1947 {
1948 s = bfd_get_section_by_name (dynobj, ".interp");
1949 if (s == NULL)
1950 abort ();
1951 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1952 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1953 }
1954 }
1955
1956 /* Set up .got offsets for local syms, and space for local dynamic
1957 relocs. */
1958 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1959 {
1960 bfd_signed_vma *local_got;
1961 bfd_signed_vma *end_local_got;
1962 char *local_tls_type;
1963 bfd_size_type locsymcount;
1964 Elf_Internal_Shdr *symtab_hdr;
1965 asection *srela;
1966
1967 if (! is_s390_elf (ibfd))
1968 continue;
1969
1970 for (s = ibfd->sections; s != NULL; s = s->next)
1971 {
1972 struct elf_s390_dyn_relocs *p;
1973
1974 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1975 {
1976 if (!bfd_is_abs_section (p->sec)
1977 && bfd_is_abs_section (p->sec->output_section))
1978 {
1979 /* Input section has been discarded, either because
1980 it is a copy of a linkonce section or due to
1981 linker script /DISCARD/, so we'll be discarding
1982 the relocs too. */
1983 }
1984 else if (p->count != 0)
1985 {
1986 srela = elf_section_data (p->sec)->sreloc;
1987 srela->size += p->count * sizeof (Elf64_External_Rela);
1988 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1989 info->flags |= DF_TEXTREL;
1990 }
1991 }
1992 }
1993
1994 local_got = elf_local_got_refcounts (ibfd);
1995 if (!local_got)
1996 continue;
1997
1998 symtab_hdr = &elf_symtab_hdr (ibfd);
1999 locsymcount = symtab_hdr->sh_info;
2000 end_local_got = local_got + locsymcount;
2001 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2002 s = htab->sgot;
2003 srela = htab->srelgot;
2004 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2005 {
2006 if (*local_got > 0)
2007 {
2008 *local_got = s->size;
2009 s->size += GOT_ENTRY_SIZE;
2010 if (*local_tls_type == GOT_TLS_GD)
2011 s->size += GOT_ENTRY_SIZE;
2012 if (info->shared)
2013 srela->size += sizeof (Elf64_External_Rela);
2014 }
2015 else
2016 *local_got = (bfd_vma) -1;
2017 }
2018 }
2019
2020 if (htab->tls_ldm_got.refcount > 0)
2021 {
2022 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2023 relocs. */
2024 htab->tls_ldm_got.offset = htab->sgot->size;
2025 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2026 htab->srelgot->size += sizeof (Elf64_External_Rela);
2027 }
2028 else
2029 htab->tls_ldm_got.offset = -1;
2030
2031 /* Allocate global sym .plt and .got entries, and space for global
2032 sym dynamic relocs. */
2033 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2034
2035 /* We now have determined the sizes of the various dynamic sections.
2036 Allocate memory for them. */
2037 relocs = FALSE;
2038 for (s = dynobj->sections; s != NULL; s = s->next)
2039 {
2040 if ((s->flags & SEC_LINKER_CREATED) == 0)
2041 continue;
2042
2043 if (s == htab->splt
2044 || s == htab->sgot
2045 || s == htab->sgotplt
2046 || s == htab->sdynbss)
2047 {
2048 /* Strip this section if we don't need it; see the
2049 comment below. */
2050 }
2051 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2052 {
2053 if (s->size != 0 && s != htab->srelplt)
2054 relocs = TRUE;
2055
2056 /* We use the reloc_count field as a counter if we need
2057 to copy relocs into the output file. */
2058 s->reloc_count = 0;
2059 }
2060 else
2061 {
2062 /* It's not one of our sections, so don't allocate space. */
2063 continue;
2064 }
2065
2066 if (s->size == 0)
2067 {
2068 /* If we don't need this section, strip it from the
2069 output file. This is to handle .rela.bss and
2070 .rela.plt. We must create it in
2071 create_dynamic_sections, because it must be created
2072 before the linker maps input sections to output
2073 sections. The linker does that before
2074 adjust_dynamic_symbol is called, and it is that
2075 function which decides whether anything needs to go
2076 into these sections. */
2077
2078 s->flags |= SEC_EXCLUDE;
2079 continue;
2080 }
2081
2082 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2083 continue;
2084
2085 /* Allocate memory for the section contents. We use bfd_zalloc
2086 here in case unused entries are not reclaimed before the
2087 section's contents are written out. This should not happen,
2088 but this way if it does, we get a R_390_NONE reloc instead
2089 of garbage. */
2090 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2091 if (s->contents == NULL)
2092 return FALSE;
2093 }
2094
2095 if (htab->elf.dynamic_sections_created)
2096 {
2097 /* Add some entries to the .dynamic section. We fill in the
2098 values later, in elf_s390_finish_dynamic_sections, but we
2099 must add the entries now so that we get the correct size for
2100 the .dynamic section. The DT_DEBUG entry is filled in by the
2101 dynamic linker and used by the debugger. */
2102 #define add_dynamic_entry(TAG, VAL) \
2103 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2104
2105 if (info->executable)
2106 {
2107 if (!add_dynamic_entry (DT_DEBUG, 0))
2108 return FALSE;
2109 }
2110
2111 if (htab->splt->size != 0)
2112 {
2113 if (!add_dynamic_entry (DT_PLTGOT, 0)
2114 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2115 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2116 || !add_dynamic_entry (DT_JMPREL, 0))
2117 return FALSE;
2118 }
2119
2120 if (relocs)
2121 {
2122 if (!add_dynamic_entry (DT_RELA, 0)
2123 || !add_dynamic_entry (DT_RELASZ, 0)
2124 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2125 return FALSE;
2126
2127 /* If any dynamic relocs apply to a read-only section,
2128 then we need a DT_TEXTREL entry. */
2129 if ((info->flags & DF_TEXTREL) == 0)
2130 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2131 (PTR) info);
2132
2133 if ((info->flags & DF_TEXTREL) != 0)
2134 {
2135 if (!add_dynamic_entry (DT_TEXTREL, 0))
2136 return FALSE;
2137 }
2138 }
2139 }
2140 #undef add_dynamic_entry
2141
2142 return TRUE;
2143 }
2144
2145 /* Return the base VMA address which should be subtracted from real addresses
2146 when resolving @dtpoff relocation.
2147 This is PT_TLS segment p_vaddr. */
2148
2149 static bfd_vma
2150 dtpoff_base (info)
2151 struct bfd_link_info *info;
2152 {
2153 /* If tls_sec is NULL, we should have signalled an error already. */
2154 if (elf_hash_table (info)->tls_sec == NULL)
2155 return 0;
2156 return elf_hash_table (info)->tls_sec->vma;
2157 }
2158
2159 /* Return the relocation value for @tpoff relocation
2160 if STT_TLS virtual address is ADDRESS. */
2161
2162 static bfd_vma
2163 tpoff (info, address)
2164 struct bfd_link_info *info;
2165 bfd_vma address;
2166 {
2167 struct elf_link_hash_table *htab = elf_hash_table (info);
2168
2169 /* If tls_sec is NULL, we should have signalled an error already. */
2170 if (htab->tls_sec == NULL)
2171 return 0;
2172 return htab->tls_size + htab->tls_sec->vma - address;
2173 }
2174
2175 /* Complain if TLS instruction relocation is against an invalid
2176 instruction. */
2177
2178 static void
2179 invalid_tls_insn (input_bfd, input_section, rel)
2180 bfd *input_bfd;
2181 asection *input_section;
2182 Elf_Internal_Rela *rel;
2183 {
2184 reloc_howto_type *howto;
2185
2186 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2187 (*_bfd_error_handler)
2188 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2189 input_bfd,
2190 input_section,
2191 (long) rel->r_offset,
2192 howto->name);
2193 bfd_set_error (bfd_error_bad_value);
2194 }
2195
2196 /* Relocate a 390 ELF section. */
2197
2198 static bfd_boolean
2199 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2200 contents, relocs, local_syms, local_sections)
2201 bfd *output_bfd;
2202 struct bfd_link_info *info;
2203 bfd *input_bfd;
2204 asection *input_section;
2205 bfd_byte *contents;
2206 Elf_Internal_Rela *relocs;
2207 Elf_Internal_Sym *local_syms;
2208 asection **local_sections;
2209 {
2210 struct elf_s390_link_hash_table *htab;
2211 Elf_Internal_Shdr *symtab_hdr;
2212 struct elf_link_hash_entry **sym_hashes;
2213 bfd_vma *local_got_offsets;
2214 Elf_Internal_Rela *rel;
2215 Elf_Internal_Rela *relend;
2216
2217 BFD_ASSERT (is_s390_elf (input_bfd));
2218
2219 htab = elf_s390_hash_table (info);
2220 symtab_hdr = &elf_symtab_hdr (input_bfd);
2221 sym_hashes = elf_sym_hashes (input_bfd);
2222 local_got_offsets = elf_local_got_offsets (input_bfd);
2223
2224 rel = relocs;
2225 relend = relocs + input_section->reloc_count;
2226 for (; rel < relend; rel++)
2227 {
2228 unsigned int r_type;
2229 reloc_howto_type *howto;
2230 unsigned long r_symndx;
2231 struct elf_link_hash_entry *h;
2232 Elf_Internal_Sym *sym;
2233 asection *sec;
2234 bfd_vma off;
2235 bfd_vma relocation;
2236 bfd_boolean unresolved_reloc;
2237 bfd_reloc_status_type r;
2238 int tls_type;
2239
2240 r_type = ELF64_R_TYPE (rel->r_info);
2241 if (r_type == (int) R_390_GNU_VTINHERIT
2242 || r_type == (int) R_390_GNU_VTENTRY)
2243 continue;
2244 if (r_type >= (int) R_390_max)
2245 {
2246 bfd_set_error (bfd_error_bad_value);
2247 return FALSE;
2248 }
2249
2250 howto = elf_howto_table + r_type;
2251 r_symndx = ELF64_R_SYM (rel->r_info);
2252
2253 h = NULL;
2254 sym = NULL;
2255 sec = NULL;
2256 unresolved_reloc = FALSE;
2257 if (r_symndx < symtab_hdr->sh_info)
2258 {
2259 sym = local_syms + r_symndx;
2260 sec = local_sections[r_symndx];
2261 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2262 }
2263 else
2264 {
2265 bfd_boolean warned ATTRIBUTE_UNUSED;
2266
2267 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2268 r_symndx, symtab_hdr, sym_hashes,
2269 h, sec, relocation,
2270 unresolved_reloc, warned);
2271 }
2272
2273 if (sec != NULL && elf_discarded_section (sec))
2274 {
2275 /* For relocs against symbols from removed linkonce sections,
2276 or sections discarded by a linker script, we just want the
2277 section contents zeroed. Avoid any special processing. */
2278 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2279 rel->r_info = 0;
2280 rel->r_addend = 0;
2281 continue;
2282 }
2283
2284 if (info->relocatable)
2285 continue;
2286
2287 switch (r_type)
2288 {
2289 case R_390_GOTPLT12:
2290 case R_390_GOTPLT16:
2291 case R_390_GOTPLT20:
2292 case R_390_GOTPLT32:
2293 case R_390_GOTPLT64:
2294 case R_390_GOTPLTENT:
2295 /* There are three cases for a GOTPLT relocation. 1) The
2296 relocation is against the jump slot entry of a plt that
2297 will get emitted to the output file. 2) The relocation
2298 is against the jump slot of a plt entry that has been
2299 removed. elf_s390_adjust_gotplt has created a GOT entry
2300 as replacement. 3) The relocation is against a local symbol.
2301 Cases 2) and 3) are the same as the GOT relocation code
2302 so we just have to test for case 1 and fall through for
2303 the other two. */
2304 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2305 {
2306 bfd_vma plt_index;
2307
2308 /* Calc. index no.
2309 Current offset - size first entry / entry size. */
2310 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2311 PLT_ENTRY_SIZE;
2312
2313 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2314 addr & GOT addr. */
2315 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2316 unresolved_reloc = FALSE;
2317
2318 if (r_type == R_390_GOTPLTENT)
2319 relocation += htab->sgot->output_section->vma;
2320 break;
2321 }
2322 /* Fall through. */
2323
2324 case R_390_GOT12:
2325 case R_390_GOT16:
2326 case R_390_GOT20:
2327 case R_390_GOT32:
2328 case R_390_GOT64:
2329 case R_390_GOTENT:
2330 /* Relocation is to the entry for this symbol in the global
2331 offset table. */
2332 if (htab->sgot == NULL)
2333 abort ();
2334
2335 if (h != NULL)
2336 {
2337 bfd_boolean dyn;
2338
2339 off = h->got.offset;
2340 dyn = htab->elf.dynamic_sections_created;
2341 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2342 || (info->shared
2343 && (info->symbolic
2344 || h->dynindx == -1
2345 || h->forced_local)
2346 && h->def_regular)
2347 || (ELF_ST_VISIBILITY (h->other)
2348 && h->root.type == bfd_link_hash_undefweak))
2349 {
2350 /* This is actually a static link, or it is a
2351 -Bsymbolic link and the symbol is defined
2352 locally, or the symbol was forced to be local
2353 because of a version file. We must initialize
2354 this entry in the global offset table. Since the
2355 offset must always be a multiple of 2, we use the
2356 least significant bit to record whether we have
2357 initialized it already.
2358
2359 When doing a dynamic link, we create a .rel.got
2360 relocation entry to initialize the value. This
2361 is done in the finish_dynamic_symbol routine. */
2362 if ((off & 1) != 0)
2363 off &= ~1;
2364 else
2365 {
2366 bfd_put_64 (output_bfd, relocation,
2367 htab->sgot->contents + off);
2368 h->got.offset |= 1;
2369 }
2370 }
2371 else
2372 unresolved_reloc = FALSE;
2373 }
2374 else
2375 {
2376 if (local_got_offsets == NULL)
2377 abort ();
2378
2379 off = local_got_offsets[r_symndx];
2380
2381 /* The offset must always be a multiple of 8. We use
2382 the least significant bit to record whether we have
2383 already generated the necessary reloc. */
2384 if ((off & 1) != 0)
2385 off &= ~1;
2386 else
2387 {
2388 bfd_put_64 (output_bfd, relocation,
2389 htab->sgot->contents + off);
2390
2391 if (info->shared)
2392 {
2393 asection *s;
2394 Elf_Internal_Rela outrel;
2395 bfd_byte *loc;
2396
2397 s = htab->srelgot;
2398 if (s == NULL)
2399 abort ();
2400
2401 outrel.r_offset = (htab->sgot->output_section->vma
2402 + htab->sgot->output_offset
2403 + off);
2404 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2405 outrel.r_addend = relocation;
2406 loc = s->contents;
2407 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2408 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2409 }
2410
2411 local_got_offsets[r_symndx] |= 1;
2412 }
2413 }
2414
2415 if (off >= (bfd_vma) -2)
2416 abort ();
2417
2418 relocation = htab->sgot->output_offset + off;
2419
2420 /* For @GOTENT the relocation is against the offset between
2421 the instruction and the symbols entry in the GOT and not
2422 between the start of the GOT and the symbols entry. We
2423 add the vma of the GOT to get the correct value. */
2424 if ( r_type == R_390_GOTENT
2425 || r_type == R_390_GOTPLTENT)
2426 relocation += htab->sgot->output_section->vma;
2427
2428 break;
2429
2430 case R_390_GOTOFF16:
2431 case R_390_GOTOFF32:
2432 case R_390_GOTOFF64:
2433 /* Relocation is relative to the start of the global offset
2434 table. */
2435
2436 /* Note that sgot->output_offset is not involved in this
2437 calculation. We always want the start of .got. If we
2438 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2439 permitted by the ABI, we might have to change this
2440 calculation. */
2441 relocation -= htab->sgot->output_section->vma;
2442 break;
2443
2444 case R_390_GOTPC:
2445 case R_390_GOTPCDBL:
2446 /* Use global offset table as symbol value. */
2447 relocation = htab->sgot->output_section->vma;
2448 unresolved_reloc = FALSE;
2449 break;
2450
2451 case R_390_PLT16DBL:
2452 case R_390_PLT32:
2453 case R_390_PLT32DBL:
2454 case R_390_PLT64:
2455 /* Relocation is to the entry for this symbol in the
2456 procedure linkage table. */
2457
2458 /* Resolve a PLT32 reloc against a local symbol directly,
2459 without using the procedure linkage table. */
2460 if (h == NULL)
2461 break;
2462
2463 if (h->plt.offset == (bfd_vma) -1
2464 || htab->splt == NULL)
2465 {
2466 /* We didn't make a PLT entry for this symbol. This
2467 happens when statically linking PIC code, or when
2468 using -Bsymbolic. */
2469 break;
2470 }
2471
2472 relocation = (htab->splt->output_section->vma
2473 + htab->splt->output_offset
2474 + h->plt.offset);
2475 unresolved_reloc = FALSE;
2476 break;
2477
2478 case R_390_PLTOFF16:
2479 case R_390_PLTOFF32:
2480 case R_390_PLTOFF64:
2481 /* Relocation is to the entry for this symbol in the
2482 procedure linkage table relative to the start of the GOT. */
2483
2484 /* For local symbols or if we didn't make a PLT entry for
2485 this symbol resolve the symbol directly. */
2486 if ( h == NULL
2487 || h->plt.offset == (bfd_vma) -1
2488 || htab->splt == NULL)
2489 {
2490 relocation -= htab->sgot->output_section->vma;
2491 break;
2492 }
2493
2494 relocation = (htab->splt->output_section->vma
2495 + htab->splt->output_offset
2496 + h->plt.offset
2497 - htab->sgot->output_section->vma);
2498 unresolved_reloc = FALSE;
2499 break;
2500
2501 case R_390_8:
2502 case R_390_16:
2503 case R_390_32:
2504 case R_390_64:
2505 case R_390_PC16:
2506 case R_390_PC16DBL:
2507 case R_390_PC32:
2508 case R_390_PC32DBL:
2509 case R_390_PC64:
2510 if ((input_section->flags & SEC_ALLOC) == 0)
2511 break;
2512
2513 if ((info->shared
2514 && (h == NULL
2515 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2516 || h->root.type != bfd_link_hash_undefweak)
2517 && ((r_type != R_390_PC16
2518 && r_type != R_390_PC16DBL
2519 && r_type != R_390_PC32
2520 && r_type != R_390_PC32DBL
2521 && r_type != R_390_PC64)
2522 || (h != NULL
2523 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2524 || (ELIMINATE_COPY_RELOCS
2525 && !info->shared
2526 && h != NULL
2527 && h->dynindx != -1
2528 && !h->non_got_ref
2529 && ((h->def_dynamic
2530 && !h->def_regular)
2531 || h->root.type == bfd_link_hash_undefweak
2532 || h->root.type == bfd_link_hash_undefined)))
2533 {
2534 Elf_Internal_Rela outrel;
2535 bfd_boolean skip, relocate;
2536 asection *sreloc;
2537 bfd_byte *loc;
2538
2539 /* When generating a shared object, these relocations
2540 are copied into the output file to be resolved at run
2541 time. */
2542 skip = FALSE;
2543 relocate = FALSE;
2544
2545 outrel.r_offset =
2546 _bfd_elf_section_offset (output_bfd, info, input_section,
2547 rel->r_offset);
2548 if (outrel.r_offset == (bfd_vma) -1)
2549 skip = TRUE;
2550 else if (outrel.r_offset == (bfd_vma) -2)
2551 skip = TRUE, relocate = TRUE;
2552
2553 outrel.r_offset += (input_section->output_section->vma
2554 + input_section->output_offset);
2555
2556 if (skip)
2557 memset (&outrel, 0, sizeof outrel);
2558 else if (h != NULL
2559 && h->dynindx != -1
2560 && (r_type == R_390_PC16
2561 || r_type == R_390_PC16DBL
2562 || r_type == R_390_PC32
2563 || r_type == R_390_PC32DBL
2564 || r_type == R_390_PC64
2565 || !info->shared
2566 || !info->symbolic
2567 || !h->def_regular))
2568 {
2569 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2570 outrel.r_addend = rel->r_addend;
2571 }
2572 else
2573 {
2574 /* This symbol is local, or marked to become local. */
2575 outrel.r_addend = relocation + rel->r_addend;
2576 if (r_type == R_390_64)
2577 {
2578 relocate = TRUE;
2579 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2580 }
2581 else
2582 {
2583 long sindx;
2584
2585 if (bfd_is_abs_section (sec))
2586 sindx = 0;
2587 else if (sec == NULL || sec->owner == NULL)
2588 {
2589 bfd_set_error(bfd_error_bad_value);
2590 return FALSE;
2591 }
2592 else
2593 {
2594 asection *osec;
2595
2596 osec = sec->output_section;
2597 sindx = elf_section_data (osec)->dynindx;
2598
2599 if (sindx == 0)
2600 {
2601 osec = htab->elf.text_index_section;
2602 sindx = elf_section_data (osec)->dynindx;
2603 }
2604 BFD_ASSERT (sindx != 0);
2605
2606 /* We are turning this relocation into one
2607 against a section symbol, so subtract out
2608 the output section's address but not the
2609 offset of the input section in the output
2610 section. */
2611 outrel.r_addend -= osec->vma;
2612 }
2613 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2614 }
2615 }
2616
2617 sreloc = elf_section_data (input_section)->sreloc;
2618 if (sreloc == NULL)
2619 abort ();
2620
2621 loc = sreloc->contents;
2622 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2623 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2624
2625 /* If this reloc is against an external symbol, we do
2626 not want to fiddle with the addend. Otherwise, we
2627 need to include the symbol value so that it becomes
2628 an addend for the dynamic reloc. */
2629 if (! relocate)
2630 continue;
2631 }
2632
2633 break;
2634
2635 /* Relocations for tls literal pool entries. */
2636 case R_390_TLS_IE64:
2637 if (info->shared)
2638 {
2639 Elf_Internal_Rela outrel;
2640 asection *sreloc;
2641 bfd_byte *loc;
2642
2643 outrel.r_offset = rel->r_offset
2644 + input_section->output_section->vma
2645 + input_section->output_offset;
2646 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2647 sreloc = elf_section_data (input_section)->sreloc;
2648 if (sreloc == NULL)
2649 abort ();
2650 loc = sreloc->contents;
2651 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2652 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2653 }
2654 /* Fall through. */
2655
2656 case R_390_TLS_GD64:
2657 case R_390_TLS_GOTIE64:
2658 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2659 tls_type = GOT_UNKNOWN;
2660 if (h == NULL && local_got_offsets)
2661 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2662 else if (h != NULL)
2663 {
2664 tls_type = elf_s390_hash_entry(h)->tls_type;
2665 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2666 r_type = R_390_TLS_LE64;
2667 }
2668 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2669 r_type = R_390_TLS_IE64;
2670
2671 if (r_type == R_390_TLS_LE64)
2672 {
2673 /* This relocation gets optimized away by the local exec
2674 access optimization. */
2675 BFD_ASSERT (! unresolved_reloc);
2676 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2677 contents + rel->r_offset);
2678 continue;
2679 }
2680
2681 if (htab->sgot == NULL)
2682 abort ();
2683
2684 if (h != NULL)
2685 off = h->got.offset;
2686 else
2687 {
2688 if (local_got_offsets == NULL)
2689 abort ();
2690
2691 off = local_got_offsets[r_symndx];
2692 }
2693
2694 emit_tls_relocs:
2695
2696 if ((off & 1) != 0)
2697 off &= ~1;
2698 else
2699 {
2700 Elf_Internal_Rela outrel;
2701 bfd_byte *loc;
2702 int dr_type, indx;
2703
2704 if (htab->srelgot == NULL)
2705 abort ();
2706
2707 outrel.r_offset = (htab->sgot->output_section->vma
2708 + htab->sgot->output_offset + off);
2709
2710 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2711 if (r_type == R_390_TLS_GD64)
2712 dr_type = R_390_TLS_DTPMOD;
2713 else
2714 dr_type = R_390_TLS_TPOFF;
2715 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2716 outrel.r_addend = relocation - dtpoff_base (info);
2717 else
2718 outrel.r_addend = 0;
2719 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2720 loc = htab->srelgot->contents;
2721 loc += htab->srelgot->reloc_count++
2722 * sizeof (Elf64_External_Rela);
2723 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2724
2725 if (r_type == R_390_TLS_GD64)
2726 {
2727 if (indx == 0)
2728 {
2729 BFD_ASSERT (! unresolved_reloc);
2730 bfd_put_64 (output_bfd,
2731 relocation - dtpoff_base (info),
2732 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2733 }
2734 else
2735 {
2736 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2737 outrel.r_offset += GOT_ENTRY_SIZE;
2738 outrel.r_addend = 0;
2739 htab->srelgot->reloc_count++;
2740 loc += sizeof (Elf64_External_Rela);
2741 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2742 }
2743 }
2744
2745 if (h != NULL)
2746 h->got.offset |= 1;
2747 else
2748 local_got_offsets[r_symndx] |= 1;
2749 }
2750
2751 if (off >= (bfd_vma) -2)
2752 abort ();
2753 if (r_type == ELF64_R_TYPE (rel->r_info))
2754 {
2755 relocation = htab->sgot->output_offset + off;
2756 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2757 relocation += htab->sgot->output_section->vma;
2758 unresolved_reloc = FALSE;
2759 }
2760 else
2761 {
2762 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2763 contents + rel->r_offset);
2764 continue;
2765 }
2766 break;
2767
2768 case R_390_TLS_GOTIE12:
2769 case R_390_TLS_GOTIE20:
2770 case R_390_TLS_IEENT:
2771 if (h == NULL)
2772 {
2773 if (local_got_offsets == NULL)
2774 abort();
2775 off = local_got_offsets[r_symndx];
2776 if (info->shared)
2777 goto emit_tls_relocs;
2778 }
2779 else
2780 {
2781 off = h->got.offset;
2782 tls_type = elf_s390_hash_entry(h)->tls_type;
2783 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2784 goto emit_tls_relocs;
2785 }
2786
2787 if (htab->sgot == NULL)
2788 abort ();
2789
2790 BFD_ASSERT (! unresolved_reloc);
2791 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2792 htab->sgot->contents + off);
2793 relocation = htab->sgot->output_offset + off;
2794 if (r_type == R_390_TLS_IEENT)
2795 relocation += htab->sgot->output_section->vma;
2796 unresolved_reloc = FALSE;
2797 break;
2798
2799 case R_390_TLS_LDM64:
2800 if (! info->shared)
2801 /* The literal pool entry this relocation refers to gets ignored
2802 by the optimized code of the local exec model. Do nothing
2803 and the value will turn out zero. */
2804 continue;
2805
2806 if (htab->sgot == NULL)
2807 abort ();
2808
2809 off = htab->tls_ldm_got.offset;
2810 if (off & 1)
2811 off &= ~1;
2812 else
2813 {
2814 Elf_Internal_Rela outrel;
2815 bfd_byte *loc;
2816
2817 if (htab->srelgot == NULL)
2818 abort ();
2819
2820 outrel.r_offset = (htab->sgot->output_section->vma
2821 + htab->sgot->output_offset + off);
2822
2823 bfd_put_64 (output_bfd, 0,
2824 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2825 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2826 outrel.r_addend = 0;
2827 loc = htab->srelgot->contents;
2828 loc += htab->srelgot->reloc_count++
2829 * sizeof (Elf64_External_Rela);
2830 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2831 htab->tls_ldm_got.offset |= 1;
2832 }
2833 relocation = htab->sgot->output_offset + off;
2834 unresolved_reloc = FALSE;
2835 break;
2836
2837 case R_390_TLS_LE64:
2838 if (info->shared)
2839 {
2840 /* Linking a shared library with non-fpic code requires
2841 a R_390_TLS_TPOFF relocation. */
2842 Elf_Internal_Rela outrel;
2843 asection *sreloc;
2844 bfd_byte *loc;
2845 int indx;
2846
2847 outrel.r_offset = rel->r_offset
2848 + input_section->output_section->vma
2849 + input_section->output_offset;
2850 if (h != NULL && h->dynindx != -1)
2851 indx = h->dynindx;
2852 else
2853 indx = 0;
2854 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2855 if (indx == 0)
2856 outrel.r_addend = relocation - dtpoff_base (info);
2857 else
2858 outrel.r_addend = 0;
2859 sreloc = elf_section_data (input_section)->sreloc;
2860 if (sreloc == NULL)
2861 abort ();
2862 loc = sreloc->contents;
2863 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2864 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2865 }
2866 else
2867 {
2868 BFD_ASSERT (! unresolved_reloc);
2869 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2870 contents + rel->r_offset);
2871 }
2872 continue;
2873
2874 case R_390_TLS_LDO64:
2875 if (info->shared)
2876 relocation -= dtpoff_base (info);
2877 else
2878 /* When converting LDO to LE, we must negate. */
2879 relocation = -tpoff (info, relocation);
2880 break;
2881
2882 /* Relocations for tls instructions. */
2883 case R_390_TLS_LOAD:
2884 case R_390_TLS_GDCALL:
2885 case R_390_TLS_LDCALL:
2886 tls_type = GOT_UNKNOWN;
2887 if (h == NULL && local_got_offsets)
2888 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2889 else if (h != NULL)
2890 tls_type = elf_s390_hash_entry(h)->tls_type;
2891
2892 if (tls_type == GOT_TLS_GD)
2893 continue;
2894
2895 if (r_type == R_390_TLS_LOAD)
2896 {
2897 if (!info->shared && (h == NULL || h->dynindx == -1))
2898 {
2899 /* IE->LE transition. Four valid cases:
2900 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2901 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2902 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2903 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2904 unsigned int insn0, insn1, ry;
2905
2906 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2907 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2908 if (insn1 != 0x0004)
2909 invalid_tls_insn (input_bfd, input_section, rel);
2910 ry = 0;
2911 if ((insn0 & 0xff00f000) == 0xe3000000)
2912 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2913 ry = (insn0 & 0x000f0000);
2914 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2915 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2916 ry = (insn0 & 0x0000f000) << 4;
2917 else if ((insn0 & 0xff00f000) == 0xe300c000)
2918 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2919 ry = (insn0 & 0x000f0000);
2920 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2921 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2922 ry = (insn0 & 0x0000f000) << 4;
2923 else
2924 invalid_tls_insn (input_bfd, input_section, rel);
2925 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2926 insn1 = 0x000d;
2927 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2928 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2929 }
2930 }
2931 else if (r_type == R_390_TLS_GDCALL)
2932 {
2933 unsigned int insn0, insn1;
2934
2935 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2936 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2937 if ((insn0 & 0xffff0000) != 0xc0e50000)
2938 invalid_tls_insn (input_bfd, input_section, rel);
2939 if (!info->shared && (h == NULL || h->dynindx == -1))
2940 {
2941 /* GD->LE transition.
2942 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2943 insn0 = 0xc0040000;
2944 insn1 = 0x0000;
2945 }
2946 else
2947 {
2948 /* GD->IE transition.
2949 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2950 insn0 = 0xe322c000;
2951 insn1 = 0x0004;
2952 }
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 else if (r_type == R_390_TLS_LDCALL)
2957 {
2958 if (!info->shared)
2959 {
2960 unsigned int insn0, insn1;
2961
2962 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2963 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2964 if ((insn0 & 0xffff0000) != 0xc0e50000)
2965 invalid_tls_insn (input_bfd, input_section, rel);
2966 /* LD->LE transition.
2967 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2968 insn0 = 0xc0040000;
2969 insn1 = 0x0000;
2970 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2971 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2972 }
2973 }
2974 continue;
2975
2976 default:
2977 break;
2978 }
2979
2980 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2981 because such sections are not SEC_ALLOC and thus ld.so will
2982 not process them. */
2983 if (unresolved_reloc
2984 && !((input_section->flags & SEC_DEBUGGING) != 0
2985 && h->def_dynamic))
2986 (*_bfd_error_handler)
2987 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2988 input_bfd,
2989 input_section,
2990 (long) rel->r_offset,
2991 howto->name,
2992 h->root.root.string);
2993
2994 if (r_type == R_390_20
2995 || r_type == R_390_GOT20
2996 || r_type == R_390_GOTPLT20
2997 || r_type == R_390_TLS_GOTIE20)
2998 {
2999 relocation += rel->r_addend;
3000 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3001 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3002 contents, rel->r_offset,
3003 relocation, 0);
3004 }
3005 else
3006 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3007 contents, rel->r_offset,
3008 relocation, rel->r_addend);
3009
3010 if (r != bfd_reloc_ok)
3011 {
3012 const char *name;
3013
3014 if (h != NULL)
3015 name = h->root.root.string;
3016 else
3017 {
3018 name = bfd_elf_string_from_elf_section (input_bfd,
3019 symtab_hdr->sh_link,
3020 sym->st_name);
3021 if (name == NULL)
3022 return FALSE;
3023 if (*name == '\0')
3024 name = bfd_section_name (input_bfd, sec);
3025 }
3026
3027 if (r == bfd_reloc_overflow)
3028 {
3029
3030 if (! ((*info->callbacks->reloc_overflow)
3031 (info, (h ? &h->root : NULL), name, howto->name,
3032 (bfd_vma) 0, input_bfd, input_section,
3033 rel->r_offset)))
3034 return FALSE;
3035 }
3036 else
3037 {
3038 (*_bfd_error_handler)
3039 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3040 input_bfd, input_section,
3041 (long) rel->r_offset, name, (int) r);
3042 return FALSE;
3043 }
3044 }
3045 }
3046
3047 return TRUE;
3048 }
3049
3050 /* Finish up dynamic symbol handling. We set the contents of various
3051 dynamic sections here. */
3052
3053 static bfd_boolean
3054 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3055 bfd *output_bfd;
3056 struct bfd_link_info *info;
3057 struct elf_link_hash_entry *h;
3058 Elf_Internal_Sym *sym;
3059 {
3060 struct elf_s390_link_hash_table *htab;
3061
3062 htab = elf_s390_hash_table (info);
3063
3064 if (h->plt.offset != (bfd_vma) -1)
3065 {
3066 bfd_vma plt_index;
3067 bfd_vma got_offset;
3068 Elf_Internal_Rela rela;
3069 bfd_byte *loc;
3070
3071 /* This symbol has an entry in the procedure linkage table. Set
3072 it up. */
3073
3074 if (h->dynindx == -1
3075 || htab->splt == NULL
3076 || htab->sgotplt == NULL
3077 || htab->srelplt == NULL)
3078 abort ();
3079
3080 /* Calc. index no.
3081 Current offset - size first entry / entry size. */
3082 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3083
3084 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3085 addr & GOT addr. */
3086 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3087
3088 /* Fill in the blueprint of a PLT. */
3089 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3090 htab->splt->contents + h->plt.offset);
3091 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3092 htab->splt->contents + h->plt.offset + 4);
3093 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3094 htab->splt->contents + h->plt.offset + 8);
3095 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3096 htab->splt->contents + h->plt.offset + 12);
3097 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3098 htab->splt->contents + h->plt.offset + 16);
3099 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3100 htab->splt->contents + h->plt.offset + 20);
3101 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3102 htab->splt->contents + h->plt.offset + 24);
3103 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3104 htab->splt->contents + h->plt.offset + 28);
3105 /* Fixup the relative address to the GOT entry */
3106 bfd_put_32 (output_bfd,
3107 (htab->sgotplt->output_section->vma +
3108 htab->sgotplt->output_offset + got_offset
3109 - (htab->splt->output_section->vma + h->plt.offset))/2,
3110 htab->splt->contents + h->plt.offset + 2);
3111 /* Fixup the relative branch to PLT 0 */
3112 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3113 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3114 htab->splt->contents + h->plt.offset + 24);
3115 /* Fixup offset into symbol table */
3116 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3117 htab->splt->contents + h->plt.offset + 28);
3118
3119 /* Fill in the entry in the global offset table.
3120 Points to instruction after GOT offset. */
3121 bfd_put_64 (output_bfd,
3122 (htab->splt->output_section->vma
3123 + htab->splt->output_offset
3124 + h->plt.offset
3125 + 14),
3126 htab->sgotplt->contents + got_offset);
3127
3128 /* Fill in the entry in the .rela.plt section. */
3129 rela.r_offset = (htab->sgotplt->output_section->vma
3130 + htab->sgotplt->output_offset
3131 + got_offset);
3132 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3133 rela.r_addend = 0;
3134 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3135 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3136
3137 if (!h->def_regular)
3138 {
3139 /* Mark the symbol as undefined, rather than as defined in
3140 the .plt section. Leave the value alone. This is a clue
3141 for the dynamic linker, to make function pointer
3142 comparisons work between an application and shared
3143 library. */
3144 sym->st_shndx = SHN_UNDEF;
3145 }
3146 }
3147
3148 if (h->got.offset != (bfd_vma) -1
3149 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3150 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3151 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3152 {
3153 Elf_Internal_Rela rela;
3154 bfd_byte *loc;
3155
3156 /* This symbol has an entry in the global offset table. Set it
3157 up. */
3158 if (htab->sgot == NULL || htab->srelgot == NULL)
3159 abort ();
3160
3161 rela.r_offset = (htab->sgot->output_section->vma
3162 + htab->sgot->output_offset
3163 + (h->got.offset &~ (bfd_vma) 1));
3164
3165 /* If this is a static link, or it is a -Bsymbolic link and the
3166 symbol is defined locally or was forced to be local because
3167 of a version file, we just want to emit a RELATIVE reloc.
3168 The entry in the global offset table will already have been
3169 initialized in the relocate_section function. */
3170 if (info->shared
3171 && (info->symbolic
3172 || h->dynindx == -1
3173 || h->forced_local)
3174 && h->def_regular)
3175 {
3176 BFD_ASSERT((h->got.offset & 1) != 0);
3177 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3178 rela.r_addend = (h->root.u.def.value
3179 + h->root.u.def.section->output_section->vma
3180 + h->root.u.def.section->output_offset);
3181 }
3182 else
3183 {
3184 BFD_ASSERT((h->got.offset & 1) == 0);
3185 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3186 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3187 rela.r_addend = 0;
3188 }
3189
3190 loc = htab->srelgot->contents;
3191 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3192 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3193 }
3194
3195 if (h->needs_copy)
3196 {
3197 Elf_Internal_Rela rela;
3198 bfd_byte *loc;
3199
3200 /* This symbols needs a copy reloc. Set it up. */
3201
3202 if (h->dynindx == -1
3203 || (h->root.type != bfd_link_hash_defined
3204 && h->root.type != bfd_link_hash_defweak)
3205 || htab->srelbss == NULL)
3206 abort ();
3207
3208 rela.r_offset = (h->root.u.def.value
3209 + h->root.u.def.section->output_section->vma
3210 + h->root.u.def.section->output_offset);
3211 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3212 rela.r_addend = 0;
3213 loc = htab->srelbss->contents;
3214 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3215 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3216 }
3217
3218 /* Mark some specially defined symbols as absolute. */
3219 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3220 || h == htab->elf.hgot
3221 || h == htab->elf.hplt)
3222 sym->st_shndx = SHN_ABS;
3223
3224 return TRUE;
3225 }
3226
3227 /* Used to decide how to sort relocs in an optimal manner for the
3228 dynamic linker, before writing them out. */
3229
3230 static enum elf_reloc_type_class
3231 elf_s390_reloc_type_class (rela)
3232 const Elf_Internal_Rela *rela;
3233 {
3234 switch ((int) ELF64_R_TYPE (rela->r_info))
3235 {
3236 case R_390_RELATIVE:
3237 return reloc_class_relative;
3238 case R_390_JMP_SLOT:
3239 return reloc_class_plt;
3240 case R_390_COPY:
3241 return reloc_class_copy;
3242 default:
3243 return reloc_class_normal;
3244 }
3245 }
3246
3247 /* Finish up the dynamic sections. */
3248
3249 static bfd_boolean
3250 elf_s390_finish_dynamic_sections (output_bfd, info)
3251 bfd *output_bfd;
3252 struct bfd_link_info *info;
3253 {
3254 struct elf_s390_link_hash_table *htab;
3255 bfd *dynobj;
3256 asection *sdyn;
3257
3258 htab = elf_s390_hash_table (info);
3259 dynobj = htab->elf.dynobj;
3260 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3261
3262 if (htab->elf.dynamic_sections_created)
3263 {
3264 Elf64_External_Dyn *dyncon, *dynconend;
3265
3266 if (sdyn == NULL || htab->sgot == NULL)
3267 abort ();
3268
3269 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3270 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3271 for (; dyncon < dynconend; dyncon++)
3272 {
3273 Elf_Internal_Dyn dyn;
3274 asection *s;
3275
3276 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3277
3278 switch (dyn.d_tag)
3279 {
3280 default:
3281 continue;
3282
3283 case DT_PLTGOT:
3284 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3285 break;
3286
3287 case DT_JMPREL:
3288 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3289 break;
3290
3291 case DT_PLTRELSZ:
3292 s = htab->srelplt->output_section;
3293 dyn.d_un.d_val = s->size;
3294 break;
3295
3296 case DT_RELASZ:
3297 /* The procedure linkage table relocs (DT_JMPREL) should
3298 not be included in the overall relocs (DT_RELA).
3299 Therefore, we override the DT_RELASZ entry here to
3300 make it not include the JMPREL relocs. Since the
3301 linker script arranges for .rela.plt to follow all
3302 other relocation sections, we don't have to worry
3303 about changing the DT_RELA entry. */
3304 s = htab->srelplt->output_section;
3305 dyn.d_un.d_val -= s->size;
3306 break;
3307 }
3308
3309 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3310 }
3311
3312 /* Fill in the special first entry in the procedure linkage table. */
3313 if (htab->splt && htab->splt->size > 0)
3314 {
3315 /* fill in blueprint for plt 0 entry */
3316 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3317 htab->splt->contents );
3318 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3319 htab->splt->contents +4 );
3320 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3321 htab->splt->contents +12 );
3322 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3323 htab->splt->contents +16 );
3324 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3325 htab->splt->contents +20 );
3326 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3327 htab->splt->contents + 24);
3328 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3329 htab->splt->contents + 28 );
3330 /* Fixup relative address to start of GOT */
3331 bfd_put_32 (output_bfd,
3332 (htab->sgotplt->output_section->vma +
3333 htab->sgotplt->output_offset
3334 - htab->splt->output_section->vma - 6)/2,
3335 htab->splt->contents + 8);
3336 }
3337 elf_section_data (htab->splt->output_section)
3338 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3339 }
3340
3341 if (htab->sgotplt)
3342 {
3343 /* Fill in the first three entries in the global offset table. */
3344 if (htab->sgotplt->size > 0)
3345 {
3346 bfd_put_64 (output_bfd,
3347 (sdyn == NULL ? (bfd_vma) 0
3348 : sdyn->output_section->vma + sdyn->output_offset),
3349 htab->sgotplt->contents);
3350 /* One entry for shared object struct ptr. */
3351 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3352 /* One entry for _dl_runtime_resolve. */
3353 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3354 }
3355
3356 elf_section_data (htab->sgot->output_section)
3357 ->this_hdr.sh_entsize = 8;
3358 }
3359 return TRUE;
3360 }
3361
3362 /* Return address for Ith PLT stub in section PLT, for relocation REL
3363 or (bfd_vma) -1 if it should not be included. */
3364
3365 static bfd_vma
3366 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3367 const arelent *rel ATTRIBUTE_UNUSED)
3368 {
3369 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3370 }
3371
3372
3373 /* Why was the hash table entry size definition changed from
3374 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3375 this is the only reason for the s390_elf64_size_info structure. */
3376
3377 const struct elf_size_info s390_elf64_size_info =
3378 {
3379 sizeof (Elf64_External_Ehdr),
3380 sizeof (Elf64_External_Phdr),
3381 sizeof (Elf64_External_Shdr),
3382 sizeof (Elf64_External_Rel),
3383 sizeof (Elf64_External_Rela),
3384 sizeof (Elf64_External_Sym),
3385 sizeof (Elf64_External_Dyn),
3386 sizeof (Elf_External_Note),
3387 8, /* hash-table entry size. */
3388 1, /* internal relocations per external relocations. */
3389 64, /* arch_size. */
3390 3, /* log_file_align. */
3391 ELFCLASS64, EV_CURRENT,
3392 bfd_elf64_write_out_phdrs,
3393 bfd_elf64_write_shdrs_and_ehdr,
3394 bfd_elf64_checksum_contents,
3395 bfd_elf64_write_relocs,
3396 bfd_elf64_swap_symbol_in,
3397 bfd_elf64_swap_symbol_out,
3398 bfd_elf64_slurp_reloc_table,
3399 bfd_elf64_slurp_symbol_table,
3400 bfd_elf64_swap_dyn_in,
3401 bfd_elf64_swap_dyn_out,
3402 bfd_elf64_swap_reloc_in,
3403 bfd_elf64_swap_reloc_out,
3404 bfd_elf64_swap_reloca_in,
3405 bfd_elf64_swap_reloca_out
3406 };
3407
3408 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3409 #define TARGET_BIG_NAME "elf64-s390"
3410 #define ELF_ARCH bfd_arch_s390
3411 #define ELF_MACHINE_CODE EM_S390
3412 #define ELF_MACHINE_ALT1 EM_S390_OLD
3413 #define ELF_MAXPAGESIZE 0x1000
3414
3415 #define elf_backend_size_info s390_elf64_size_info
3416
3417 #define elf_backend_can_gc_sections 1
3418 #define elf_backend_can_refcount 1
3419 #define elf_backend_want_got_plt 1
3420 #define elf_backend_plt_readonly 1
3421 #define elf_backend_want_plt_sym 0
3422 #define elf_backend_got_header_size 24
3423 #define elf_backend_rela_normal 1
3424
3425 #define elf_info_to_howto elf_s390_info_to_howto
3426
3427 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3428 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3429 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3430 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3431
3432 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3433 #define elf_backend_check_relocs elf_s390_check_relocs
3434 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3435 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3436 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3437 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3438 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3439 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3440 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3441 #define elf_backend_relocate_section elf_s390_relocate_section
3442 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3443 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3444 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3445 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3446
3447 #define bfd_elf64_mkobject elf_s390_mkobject
3448 #define elf_backend_object_p elf_s390_object_p
3449
3450 #include "elf64-target.h"
GDB Binutils - Deliverables
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