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* config/tc-mips.c (mips_dwarf2_addr_size): Use HAVE_64BIT_OBJECTS
[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 && (! SYMBOLIC_BIND (info, h)
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 || SYMBOL_CALLS_LOCAL (info, h)
1545 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1546 && h->root.type == bfd_link_hash_undefweak))
1547 {
1548 /* This case can occur if we saw a PLT32 reloc in an input
1549 file, but the symbol was never referred to by a dynamic
1550 object, or if all references were garbage collected. In
1551 such a case, we don't actually need to build a procedure
1552 linkage table, and we can just do a PC32 reloc instead. */
1553 h->plt.offset = (bfd_vma) -1;
1554 h->needs_plt = 0;
1555 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1556 }
1557
1558 return TRUE;
1559 }
1560 else
1561 /* It's possible that we incorrectly decided a .plt reloc was
1562 needed for an R_390_PC32 reloc to a non-function sym in
1563 check_relocs. We can't decide accurately between function and
1564 non-function syms in check-relocs; Objects loaded later in
1565 the link may change h->type. So fix it now. */
1566 h->plt.offset = (bfd_vma) -1;
1567
1568 /* If this is a weak symbol, and there is a real definition, the
1569 processor independent code will have arranged for us to see the
1570 real definition first, and we can just use the same value. */
1571 if (h->u.weakdef != NULL)
1572 {
1573 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1574 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1575 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1576 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1577 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1578 h->non_got_ref = h->u.weakdef->non_got_ref;
1579 return TRUE;
1580 }
1581
1582 /* This is a reference to a symbol defined by a dynamic object which
1583 is not a function. */
1584
1585 /* If we are creating a shared library, we must presume that the
1586 only references to the symbol are via the global offset table.
1587 For such cases we need not do anything here; the relocations will
1588 be handled correctly by relocate_section. */
1589 if (info->shared)
1590 return TRUE;
1591
1592 /* If there are no references to this symbol that do not use the
1593 GOT, we don't need to generate a copy reloc. */
1594 if (!h->non_got_ref)
1595 return TRUE;
1596
1597 /* If -z nocopyreloc was given, we won't generate them either. */
1598 if (info->nocopyreloc)
1599 {
1600 h->non_got_ref = 0;
1601 return TRUE;
1602 }
1603
1604 if (ELIMINATE_COPY_RELOCS)
1605 {
1606 struct elf_s390_link_hash_entry * eh;
1607 struct elf_s390_dyn_relocs *p;
1608
1609 eh = (struct elf_s390_link_hash_entry *) h;
1610 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1611 {
1612 s = p->sec->output_section;
1613 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1614 break;
1615 }
1616
1617 /* If we didn't find any dynamic relocs in read-only sections, then
1618 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1619 if (p == NULL)
1620 {
1621 h->non_got_ref = 0;
1622 return TRUE;
1623 }
1624 }
1625
1626 if (h->size == 0)
1627 {
1628 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1629 h->root.root.string);
1630 return TRUE;
1631 }
1632
1633 /* We must allocate the symbol in our .dynbss section, which will
1634 become part of the .bss section of the executable. There will be
1635 an entry for this symbol in the .dynsym section. The dynamic
1636 object will contain position independent code, so all references
1637 from the dynamic object to this symbol will go through the global
1638 offset table. The dynamic linker will use the .dynsym entry to
1639 determine the address it must put in the global offset table, so
1640 both the dynamic object and the regular object will refer to the
1641 same memory location for the variable. */
1642
1643 htab = elf_s390_hash_table (info);
1644
1645 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1646 copy the initial value out of the dynamic object and into the
1647 runtime process image. */
1648 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1649 {
1650 htab->srelbss->size += sizeof (Elf64_External_Rela);
1651 h->needs_copy = 1;
1652 }
1653
1654 s = htab->sdynbss;
1655
1656 return _bfd_elf_adjust_dynamic_copy (h, s);
1657 }
1658
1659 /* Allocate space in .plt, .got and associated reloc sections for
1660 dynamic relocs. */
1661
1662 static bfd_boolean
1663 allocate_dynrelocs (h, inf)
1664 struct elf_link_hash_entry *h;
1665 PTR inf;
1666 {
1667 struct bfd_link_info *info;
1668 struct elf_s390_link_hash_table *htab;
1669 struct elf_s390_link_hash_entry *eh;
1670 struct elf_s390_dyn_relocs *p;
1671
1672 if (h->root.type == bfd_link_hash_indirect)
1673 return TRUE;
1674
1675 if (h->root.type == bfd_link_hash_warning)
1676 /* When warning symbols are created, they **replace** the "real"
1677 entry in the hash table, thus we never get to see the real
1678 symbol in a hash traversal. So look at it now. */
1679 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1680
1681 info = (struct bfd_link_info *) inf;
1682 htab = elf_s390_hash_table (info);
1683
1684 if (htab->elf.dynamic_sections_created
1685 && h->plt.refcount > 0)
1686 {
1687 /* Make sure this symbol is output as a dynamic symbol.
1688 Undefined weak syms won't yet be marked as dynamic. */
1689 if (h->dynindx == -1
1690 && !h->forced_local)
1691 {
1692 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1693 return FALSE;
1694 }
1695
1696 if (info->shared
1697 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1698 {
1699 asection *s = htab->splt;
1700
1701 /* If this is the first .plt entry, make room for the special
1702 first entry. */
1703 if (s->size == 0)
1704 s->size += PLT_FIRST_ENTRY_SIZE;
1705
1706 h->plt.offset = s->size;
1707
1708 /* If this symbol is not defined in a regular file, and we are
1709 not generating a shared library, then set the symbol to this
1710 location in the .plt. This is required to make function
1711 pointers compare as equal between the normal executable and
1712 the shared library. */
1713 if (! info->shared
1714 && !h->def_regular)
1715 {
1716 h->root.u.def.section = s;
1717 h->root.u.def.value = h->plt.offset;
1718 }
1719
1720 /* Make room for this entry. */
1721 s->size += PLT_ENTRY_SIZE;
1722
1723 /* We also need to make an entry in the .got.plt section, which
1724 will be placed in the .got section by the linker script. */
1725 htab->sgotplt->size += GOT_ENTRY_SIZE;
1726
1727 /* We also need to make an entry in the .rela.plt section. */
1728 htab->srelplt->size += sizeof (Elf64_External_Rela);
1729 }
1730 else
1731 {
1732 h->plt.offset = (bfd_vma) -1;
1733 h->needs_plt = 0;
1734 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1735 }
1736 }
1737 else
1738 {
1739 h->plt.offset = (bfd_vma) -1;
1740 h->needs_plt = 0;
1741 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1742 }
1743
1744 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1745 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1746 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1747 we can save the dynamic TLS relocation. */
1748 if (h->got.refcount > 0
1749 && !info->shared
1750 && h->dynindx == -1
1751 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1752 {
1753 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1754 /* For the GOTIE access without a literal pool entry the offset has
1755 to be stored somewhere. The immediate value in the instruction
1756 is not bit enough so the value is stored in the got. */
1757 {
1758 h->got.offset = htab->sgot->size;
1759 htab->sgot->size += GOT_ENTRY_SIZE;
1760 }
1761 else
1762 h->got.offset = (bfd_vma) -1;
1763 }
1764 else if (h->got.refcount > 0)
1765 {
1766 asection *s;
1767 bfd_boolean dyn;
1768 int tls_type = elf_s390_hash_entry(h)->tls_type;
1769
1770 /* Make sure this symbol is output as a dynamic symbol.
1771 Undefined weak syms won't yet be marked as dynamic. */
1772 if (h->dynindx == -1
1773 && !h->forced_local)
1774 {
1775 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1776 return FALSE;
1777 }
1778
1779 s = htab->sgot;
1780 h->got.offset = s->size;
1781 s->size += GOT_ENTRY_SIZE;
1782 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1783 if (tls_type == GOT_TLS_GD)
1784 s->size += GOT_ENTRY_SIZE;
1785 dyn = htab->elf.dynamic_sections_created;
1786 /* R_390_TLS_IE64 needs one dynamic relocation,
1787 R_390_TLS_GD64 needs one if local symbol and two if global. */
1788 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1789 || tls_type >= GOT_TLS_IE)
1790 htab->srelgot->size += sizeof (Elf64_External_Rela);
1791 else if (tls_type == GOT_TLS_GD)
1792 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1793 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1794 || h->root.type != bfd_link_hash_undefweak)
1795 && (info->shared
1796 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1797 htab->srelgot->size += sizeof (Elf64_External_Rela);
1798 }
1799 else
1800 h->got.offset = (bfd_vma) -1;
1801
1802 eh = (struct elf_s390_link_hash_entry *) h;
1803 if (eh->dyn_relocs == NULL)
1804 return TRUE;
1805
1806 /* In the shared -Bsymbolic case, discard space allocated for
1807 dynamic pc-relative relocs against symbols which turn out to be
1808 defined in regular objects. For the normal shared case, discard
1809 space for pc-relative relocs that have become local due to symbol
1810 visibility changes. */
1811
1812 if (info->shared)
1813 {
1814 if (SYMBOL_CALLS_LOCAL (info, h))
1815 {
1816 struct elf_s390_dyn_relocs **pp;
1817
1818 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1819 {
1820 p->count -= p->pc_count;
1821 p->pc_count = 0;
1822 if (p->count == 0)
1823 *pp = p->next;
1824 else
1825 pp = &p->next;
1826 }
1827 }
1828
1829 /* Also discard relocs on undefined weak syms with non-default
1830 visibility. */
1831 if (eh->dyn_relocs != NULL
1832 && h->root.type == bfd_link_hash_undefweak)
1833 {
1834 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1835 eh->dyn_relocs = NULL;
1836
1837 /* Make sure undefined weak symbols are output as a dynamic
1838 symbol in PIEs. */
1839 else if (h->dynindx == -1
1840 && !h->forced_local)
1841 {
1842 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1843 return FALSE;
1844 }
1845 }
1846 }
1847 else if (ELIMINATE_COPY_RELOCS)
1848 {
1849 /* For the non-shared case, discard space for relocs against
1850 symbols which turn out to need copy relocs or are not
1851 dynamic. */
1852
1853 if (!h->non_got_ref
1854 && ((h->def_dynamic
1855 && !h->def_regular)
1856 || (htab->elf.dynamic_sections_created
1857 && (h->root.type == bfd_link_hash_undefweak
1858 || h->root.type == bfd_link_hash_undefined))))
1859 {
1860 /* Make sure this symbol is output as a dynamic symbol.
1861 Undefined weak syms won't yet be marked as dynamic. */
1862 if (h->dynindx == -1
1863 && !h->forced_local)
1864 {
1865 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1866 return FALSE;
1867 }
1868
1869 /* If that succeeded, we know we'll be keeping all the
1870 relocs. */
1871 if (h->dynindx != -1)
1872 goto keep;
1873 }
1874
1875 eh->dyn_relocs = NULL;
1876
1877 keep: ;
1878 }
1879
1880 /* Finally, allocate space. */
1881 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1882 {
1883 asection *sreloc = elf_section_data (p->sec)->sreloc;
1884 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1885 }
1886
1887 return TRUE;
1888 }
1889
1890 /* Find any dynamic relocs that apply to read-only sections. */
1891
1892 static bfd_boolean
1893 readonly_dynrelocs (h, inf)
1894 struct elf_link_hash_entry *h;
1895 PTR inf;
1896 {
1897 struct elf_s390_link_hash_entry *eh;
1898 struct elf_s390_dyn_relocs *p;
1899
1900 if (h->root.type == bfd_link_hash_warning)
1901 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1902
1903 eh = (struct elf_s390_link_hash_entry *) h;
1904 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1905 {
1906 asection *s = p->sec->output_section;
1907
1908 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1909 {
1910 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1911
1912 info->flags |= DF_TEXTREL;
1913
1914 /* Not an error, just cut short the traversal. */
1915 return FALSE;
1916 }
1917 }
1918 return TRUE;
1919 }
1920
1921 /* Set the sizes of the dynamic sections. */
1922
1923 static bfd_boolean
1924 elf_s390_size_dynamic_sections (output_bfd, info)
1925 bfd *output_bfd ATTRIBUTE_UNUSED;
1926 struct bfd_link_info *info;
1927 {
1928 struct elf_s390_link_hash_table *htab;
1929 bfd *dynobj;
1930 asection *s;
1931 bfd_boolean relocs;
1932 bfd *ibfd;
1933
1934 htab = elf_s390_hash_table (info);
1935 dynobj = htab->elf.dynobj;
1936 if (dynobj == NULL)
1937 abort ();
1938
1939 if (htab->elf.dynamic_sections_created)
1940 {
1941 /* Set the contents of the .interp section to the interpreter. */
1942 if (info->executable)
1943 {
1944 s = bfd_get_section_by_name (dynobj, ".interp");
1945 if (s == NULL)
1946 abort ();
1947 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1948 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1949 }
1950 }
1951
1952 /* Set up .got offsets for local syms, and space for local dynamic
1953 relocs. */
1954 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1955 {
1956 bfd_signed_vma *local_got;
1957 bfd_signed_vma *end_local_got;
1958 char *local_tls_type;
1959 bfd_size_type locsymcount;
1960 Elf_Internal_Shdr *symtab_hdr;
1961 asection *srela;
1962
1963 if (! is_s390_elf (ibfd))
1964 continue;
1965
1966 for (s = ibfd->sections; s != NULL; s = s->next)
1967 {
1968 struct elf_s390_dyn_relocs *p;
1969
1970 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1971 {
1972 if (!bfd_is_abs_section (p->sec)
1973 && bfd_is_abs_section (p->sec->output_section))
1974 {
1975 /* Input section has been discarded, either because
1976 it is a copy of a linkonce section or due to
1977 linker script /DISCARD/, so we'll be discarding
1978 the relocs too. */
1979 }
1980 else if (p->count != 0)
1981 {
1982 srela = elf_section_data (p->sec)->sreloc;
1983 srela->size += p->count * sizeof (Elf64_External_Rela);
1984 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1985 info->flags |= DF_TEXTREL;
1986 }
1987 }
1988 }
1989
1990 local_got = elf_local_got_refcounts (ibfd);
1991 if (!local_got)
1992 continue;
1993
1994 symtab_hdr = &elf_symtab_hdr (ibfd);
1995 locsymcount = symtab_hdr->sh_info;
1996 end_local_got = local_got + locsymcount;
1997 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1998 s = htab->sgot;
1999 srela = htab->srelgot;
2000 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2001 {
2002 if (*local_got > 0)
2003 {
2004 *local_got = s->size;
2005 s->size += GOT_ENTRY_SIZE;
2006 if (*local_tls_type == GOT_TLS_GD)
2007 s->size += GOT_ENTRY_SIZE;
2008 if (info->shared)
2009 srela->size += sizeof (Elf64_External_Rela);
2010 }
2011 else
2012 *local_got = (bfd_vma) -1;
2013 }
2014 }
2015
2016 if (htab->tls_ldm_got.refcount > 0)
2017 {
2018 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2019 relocs. */
2020 htab->tls_ldm_got.offset = htab->sgot->size;
2021 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2022 htab->srelgot->size += sizeof (Elf64_External_Rela);
2023 }
2024 else
2025 htab->tls_ldm_got.offset = -1;
2026
2027 /* Allocate global sym .plt and .got entries, and space for global
2028 sym dynamic relocs. */
2029 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2030
2031 /* We now have determined the sizes of the various dynamic sections.
2032 Allocate memory for them. */
2033 relocs = FALSE;
2034 for (s = dynobj->sections; s != NULL; s = s->next)
2035 {
2036 if ((s->flags & SEC_LINKER_CREATED) == 0)
2037 continue;
2038
2039 if (s == htab->splt
2040 || s == htab->sgot
2041 || s == htab->sgotplt
2042 || s == htab->sdynbss)
2043 {
2044 /* Strip this section if we don't need it; see the
2045 comment below. */
2046 }
2047 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2048 {
2049 if (s->size != 0 && s != htab->srelplt)
2050 relocs = TRUE;
2051
2052 /* We use the reloc_count field as a counter if we need
2053 to copy relocs into the output file. */
2054 s->reloc_count = 0;
2055 }
2056 else
2057 {
2058 /* It's not one of our sections, so don't allocate space. */
2059 continue;
2060 }
2061
2062 if (s->size == 0)
2063 {
2064 /* If we don't need this section, strip it from the
2065 output file. This is to handle .rela.bss and
2066 .rela.plt. We must create it in
2067 create_dynamic_sections, because it must be created
2068 before the linker maps input sections to output
2069 sections. The linker does that before
2070 adjust_dynamic_symbol is called, and it is that
2071 function which decides whether anything needs to go
2072 into these sections. */
2073
2074 s->flags |= SEC_EXCLUDE;
2075 continue;
2076 }
2077
2078 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2079 continue;
2080
2081 /* Allocate memory for the section contents. We use bfd_zalloc
2082 here in case unused entries are not reclaimed before the
2083 section's contents are written out. This should not happen,
2084 but this way if it does, we get a R_390_NONE reloc instead
2085 of garbage. */
2086 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2087 if (s->contents == NULL)
2088 return FALSE;
2089 }
2090
2091 if (htab->elf.dynamic_sections_created)
2092 {
2093 /* Add some entries to the .dynamic section. We fill in the
2094 values later, in elf_s390_finish_dynamic_sections, but we
2095 must add the entries now so that we get the correct size for
2096 the .dynamic section. The DT_DEBUG entry is filled in by the
2097 dynamic linker and used by the debugger. */
2098 #define add_dynamic_entry(TAG, VAL) \
2099 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2100
2101 if (info->executable)
2102 {
2103 if (!add_dynamic_entry (DT_DEBUG, 0))
2104 return FALSE;
2105 }
2106
2107 if (htab->splt->size != 0)
2108 {
2109 if (!add_dynamic_entry (DT_PLTGOT, 0)
2110 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2111 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2112 || !add_dynamic_entry (DT_JMPREL, 0))
2113 return FALSE;
2114 }
2115
2116 if (relocs)
2117 {
2118 if (!add_dynamic_entry (DT_RELA, 0)
2119 || !add_dynamic_entry (DT_RELASZ, 0)
2120 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2121 return FALSE;
2122
2123 /* If any dynamic relocs apply to a read-only section,
2124 then we need a DT_TEXTREL entry. */
2125 if ((info->flags & DF_TEXTREL) == 0)
2126 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2127 (PTR) info);
2128
2129 if ((info->flags & DF_TEXTREL) != 0)
2130 {
2131 if (!add_dynamic_entry (DT_TEXTREL, 0))
2132 return FALSE;
2133 }
2134 }
2135 }
2136 #undef add_dynamic_entry
2137
2138 return TRUE;
2139 }
2140
2141 /* Return the base VMA address which should be subtracted from real addresses
2142 when resolving @dtpoff relocation.
2143 This is PT_TLS segment p_vaddr. */
2144
2145 static bfd_vma
2146 dtpoff_base (info)
2147 struct bfd_link_info *info;
2148 {
2149 /* If tls_sec is NULL, we should have signalled an error already. */
2150 if (elf_hash_table (info)->tls_sec == NULL)
2151 return 0;
2152 return elf_hash_table (info)->tls_sec->vma;
2153 }
2154
2155 /* Return the relocation value for @tpoff relocation
2156 if STT_TLS virtual address is ADDRESS. */
2157
2158 static bfd_vma
2159 tpoff (info, address)
2160 struct bfd_link_info *info;
2161 bfd_vma address;
2162 {
2163 struct elf_link_hash_table *htab = elf_hash_table (info);
2164
2165 /* If tls_sec is NULL, we should have signalled an error already. */
2166 if (htab->tls_sec == NULL)
2167 return 0;
2168 return htab->tls_size + htab->tls_sec->vma - address;
2169 }
2170
2171 /* Complain if TLS instruction relocation is against an invalid
2172 instruction. */
2173
2174 static void
2175 invalid_tls_insn (input_bfd, input_section, rel)
2176 bfd *input_bfd;
2177 asection *input_section;
2178 Elf_Internal_Rela *rel;
2179 {
2180 reloc_howto_type *howto;
2181
2182 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2183 (*_bfd_error_handler)
2184 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2185 input_bfd,
2186 input_section,
2187 (long) rel->r_offset,
2188 howto->name);
2189 bfd_set_error (bfd_error_bad_value);
2190 }
2191
2192 /* Relocate a 390 ELF section. */
2193
2194 static bfd_boolean
2195 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2196 contents, relocs, local_syms, local_sections)
2197 bfd *output_bfd;
2198 struct bfd_link_info *info;
2199 bfd *input_bfd;
2200 asection *input_section;
2201 bfd_byte *contents;
2202 Elf_Internal_Rela *relocs;
2203 Elf_Internal_Sym *local_syms;
2204 asection **local_sections;
2205 {
2206 struct elf_s390_link_hash_table *htab;
2207 Elf_Internal_Shdr *symtab_hdr;
2208 struct elf_link_hash_entry **sym_hashes;
2209 bfd_vma *local_got_offsets;
2210 Elf_Internal_Rela *rel;
2211 Elf_Internal_Rela *relend;
2212
2213 BFD_ASSERT (is_s390_elf (input_bfd));
2214
2215 htab = elf_s390_hash_table (info);
2216 symtab_hdr = &elf_symtab_hdr (input_bfd);
2217 sym_hashes = elf_sym_hashes (input_bfd);
2218 local_got_offsets = elf_local_got_offsets (input_bfd);
2219
2220 rel = relocs;
2221 relend = relocs + input_section->reloc_count;
2222 for (; rel < relend; rel++)
2223 {
2224 unsigned int r_type;
2225 reloc_howto_type *howto;
2226 unsigned long r_symndx;
2227 struct elf_link_hash_entry *h;
2228 Elf_Internal_Sym *sym;
2229 asection *sec;
2230 bfd_vma off;
2231 bfd_vma relocation;
2232 bfd_boolean unresolved_reloc;
2233 bfd_reloc_status_type r;
2234 int tls_type;
2235
2236 r_type = ELF64_R_TYPE (rel->r_info);
2237 if (r_type == (int) R_390_GNU_VTINHERIT
2238 || r_type == (int) R_390_GNU_VTENTRY)
2239 continue;
2240 if (r_type >= (int) R_390_max)
2241 {
2242 bfd_set_error (bfd_error_bad_value);
2243 return FALSE;
2244 }
2245
2246 howto = elf_howto_table + r_type;
2247 r_symndx = ELF64_R_SYM (rel->r_info);
2248
2249 h = NULL;
2250 sym = NULL;
2251 sec = NULL;
2252 unresolved_reloc = FALSE;
2253 if (r_symndx < symtab_hdr->sh_info)
2254 {
2255 sym = local_syms + r_symndx;
2256 sec = local_sections[r_symndx];
2257 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2258 }
2259 else
2260 {
2261 bfd_boolean warned ATTRIBUTE_UNUSED;
2262
2263 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2264 r_symndx, symtab_hdr, sym_hashes,
2265 h, sec, relocation,
2266 unresolved_reloc, warned);
2267 }
2268
2269 if (sec != NULL && elf_discarded_section (sec))
2270 {
2271 /* For relocs against symbols from removed linkonce sections,
2272 or sections discarded by a linker script, we just want the
2273 section contents zeroed. Avoid any special processing. */
2274 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2275 rel->r_info = 0;
2276 rel->r_addend = 0;
2277 continue;
2278 }
2279
2280 if (info->relocatable)
2281 continue;
2282
2283 switch (r_type)
2284 {
2285 case R_390_GOTPLT12:
2286 case R_390_GOTPLT16:
2287 case R_390_GOTPLT20:
2288 case R_390_GOTPLT32:
2289 case R_390_GOTPLT64:
2290 case R_390_GOTPLTENT:
2291 /* There are three cases for a GOTPLT relocation. 1) The
2292 relocation is against the jump slot entry of a plt that
2293 will get emitted to the output file. 2) The relocation
2294 is against the jump slot of a plt entry that has been
2295 removed. elf_s390_adjust_gotplt has created a GOT entry
2296 as replacement. 3) The relocation is against a local symbol.
2297 Cases 2) and 3) are the same as the GOT relocation code
2298 so we just have to test for case 1 and fall through for
2299 the other two. */
2300 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2301 {
2302 bfd_vma plt_index;
2303
2304 /* Calc. index no.
2305 Current offset - size first entry / entry size. */
2306 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2307 PLT_ENTRY_SIZE;
2308
2309 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2310 addr & GOT addr. */
2311 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2312 unresolved_reloc = FALSE;
2313
2314 if (r_type == R_390_GOTPLTENT)
2315 relocation += htab->sgot->output_section->vma;
2316 break;
2317 }
2318 /* Fall through. */
2319
2320 case R_390_GOT12:
2321 case R_390_GOT16:
2322 case R_390_GOT20:
2323 case R_390_GOT32:
2324 case R_390_GOT64:
2325 case R_390_GOTENT:
2326 /* Relocation is to the entry for this symbol in the global
2327 offset table. */
2328 if (htab->sgot == NULL)
2329 abort ();
2330
2331 if (h != NULL)
2332 {
2333 bfd_boolean dyn;
2334
2335 off = h->got.offset;
2336 dyn = htab->elf.dynamic_sections_created;
2337 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2338 || (info->shared
2339 && SYMBOL_REFERENCES_LOCAL (info, h))
2340 || (ELF_ST_VISIBILITY (h->other)
2341 && h->root.type == bfd_link_hash_undefweak))
2342 {
2343 /* This is actually a static link, or it is a
2344 -Bsymbolic link and the symbol is defined
2345 locally, or the symbol was forced to be local
2346 because of a version file. We must initialize
2347 this entry in the global offset table. Since the
2348 offset must always be a multiple of 2, we use the
2349 least significant bit to record whether we have
2350 initialized it already.
2351
2352 When doing a dynamic link, we create a .rel.got
2353 relocation entry to initialize the value. This
2354 is done in the finish_dynamic_symbol routine. */
2355 if ((off & 1) != 0)
2356 off &= ~1;
2357 else
2358 {
2359 bfd_put_64 (output_bfd, relocation,
2360 htab->sgot->contents + off);
2361 h->got.offset |= 1;
2362 }
2363 }
2364 else
2365 unresolved_reloc = FALSE;
2366 }
2367 else
2368 {
2369 if (local_got_offsets == NULL)
2370 abort ();
2371
2372 off = local_got_offsets[r_symndx];
2373
2374 /* The offset must always be a multiple of 8. We use
2375 the least significant bit to record whether we have
2376 already generated the necessary reloc. */
2377 if ((off & 1) != 0)
2378 off &= ~1;
2379 else
2380 {
2381 bfd_put_64 (output_bfd, relocation,
2382 htab->sgot->contents + off);
2383
2384 if (info->shared)
2385 {
2386 asection *s;
2387 Elf_Internal_Rela outrel;
2388 bfd_byte *loc;
2389
2390 s = htab->srelgot;
2391 if (s == NULL)
2392 abort ();
2393
2394 outrel.r_offset = (htab->sgot->output_section->vma
2395 + htab->sgot->output_offset
2396 + off);
2397 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2398 outrel.r_addend = relocation;
2399 loc = s->contents;
2400 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2401 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2402 }
2403
2404 local_got_offsets[r_symndx] |= 1;
2405 }
2406 }
2407
2408 if (off >= (bfd_vma) -2)
2409 abort ();
2410
2411 relocation = htab->sgot->output_offset + off;
2412
2413 /* For @GOTENT the relocation is against the offset between
2414 the instruction and the symbols entry in the GOT and not
2415 between the start of the GOT and the symbols entry. We
2416 add the vma of the GOT to get the correct value. */
2417 if ( r_type == R_390_GOTENT
2418 || r_type == R_390_GOTPLTENT)
2419 relocation += htab->sgot->output_section->vma;
2420
2421 break;
2422
2423 case R_390_GOTOFF16:
2424 case R_390_GOTOFF32:
2425 case R_390_GOTOFF64:
2426 /* Relocation is relative to the start of the global offset
2427 table. */
2428
2429 /* Note that sgot->output_offset is not involved in this
2430 calculation. We always want the start of .got. If we
2431 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2432 permitted by the ABI, we might have to change this
2433 calculation. */
2434 relocation -= htab->sgot->output_section->vma;
2435 break;
2436
2437 case R_390_GOTPC:
2438 case R_390_GOTPCDBL:
2439 /* Use global offset table as symbol value. */
2440 relocation = htab->sgot->output_section->vma;
2441 unresolved_reloc = FALSE;
2442 break;
2443
2444 case R_390_PLT16DBL:
2445 case R_390_PLT32:
2446 case R_390_PLT32DBL:
2447 case R_390_PLT64:
2448 /* Relocation is to the entry for this symbol in the
2449 procedure linkage table. */
2450
2451 /* Resolve a PLT32 reloc against a local symbol directly,
2452 without using the procedure linkage table. */
2453 if (h == NULL)
2454 break;
2455
2456 if (h->plt.offset == (bfd_vma) -1
2457 || htab->splt == NULL)
2458 {
2459 /* We didn't make a PLT entry for this symbol. This
2460 happens when statically linking PIC code, or when
2461 using -Bsymbolic. */
2462 break;
2463 }
2464
2465 relocation = (htab->splt->output_section->vma
2466 + htab->splt->output_offset
2467 + h->plt.offset);
2468 unresolved_reloc = FALSE;
2469 break;
2470
2471 case R_390_PLTOFF16:
2472 case R_390_PLTOFF32:
2473 case R_390_PLTOFF64:
2474 /* Relocation is to the entry for this symbol in the
2475 procedure linkage table relative to the start of the GOT. */
2476
2477 /* For local symbols or if we didn't make a PLT entry for
2478 this symbol resolve the symbol directly. */
2479 if ( h == NULL
2480 || h->plt.offset == (bfd_vma) -1
2481 || htab->splt == NULL)
2482 {
2483 relocation -= htab->sgot->output_section->vma;
2484 break;
2485 }
2486
2487 relocation = (htab->splt->output_section->vma
2488 + htab->splt->output_offset
2489 + h->plt.offset
2490 - htab->sgot->output_section->vma);
2491 unresolved_reloc = FALSE;
2492 break;
2493
2494 case R_390_8:
2495 case R_390_16:
2496 case R_390_32:
2497 case R_390_64:
2498 case R_390_PC16:
2499 case R_390_PC16DBL:
2500 case R_390_PC32:
2501 case R_390_PC32DBL:
2502 case R_390_PC64:
2503 if ((input_section->flags & SEC_ALLOC) == 0)
2504 break;
2505
2506 if ((info->shared
2507 && (h == NULL
2508 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2509 || h->root.type != bfd_link_hash_undefweak)
2510 && ((r_type != R_390_PC16
2511 && r_type != R_390_PC16DBL
2512 && r_type != R_390_PC32
2513 && r_type != R_390_PC32DBL
2514 && r_type != R_390_PC64)
2515 || !SYMBOL_CALLS_LOCAL (info, h)))
2516 || (ELIMINATE_COPY_RELOCS
2517 && !info->shared
2518 && h != NULL
2519 && h->dynindx != -1
2520 && !h->non_got_ref
2521 && ((h->def_dynamic
2522 && !h->def_regular)
2523 || h->root.type == bfd_link_hash_undefweak
2524 || h->root.type == bfd_link_hash_undefined)))
2525 {
2526 Elf_Internal_Rela outrel;
2527 bfd_boolean skip, relocate;
2528 asection *sreloc;
2529 bfd_byte *loc;
2530
2531 /* When generating a shared object, these relocations
2532 are copied into the output file to be resolved at run
2533 time. */
2534 skip = FALSE;
2535 relocate = FALSE;
2536
2537 outrel.r_offset =
2538 _bfd_elf_section_offset (output_bfd, info, input_section,
2539 rel->r_offset);
2540 if (outrel.r_offset == (bfd_vma) -1)
2541 skip = TRUE;
2542 else if (outrel.r_offset == (bfd_vma) -2)
2543 skip = TRUE, relocate = TRUE;
2544
2545 outrel.r_offset += (input_section->output_section->vma
2546 + input_section->output_offset);
2547
2548 if (skip)
2549 memset (&outrel, 0, sizeof outrel);
2550 else if (h != NULL
2551 && h->dynindx != -1
2552 && (r_type == R_390_PC16
2553 || r_type == R_390_PC16DBL
2554 || r_type == R_390_PC32
2555 || r_type == R_390_PC32DBL
2556 || r_type == R_390_PC64
2557 || !info->shared
2558 || !SYMBOLIC_BIND (info, h)
2559 || !h->def_regular))
2560 {
2561 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2562 outrel.r_addend = rel->r_addend;
2563 }
2564 else
2565 {
2566 /* This symbol is local, or marked to become local. */
2567 outrel.r_addend = relocation + rel->r_addend;
2568 if (r_type == R_390_64)
2569 {
2570 relocate = TRUE;
2571 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2572 }
2573 else
2574 {
2575 long sindx;
2576
2577 if (bfd_is_abs_section (sec))
2578 sindx = 0;
2579 else if (sec == NULL || sec->owner == NULL)
2580 {
2581 bfd_set_error(bfd_error_bad_value);
2582 return FALSE;
2583 }
2584 else
2585 {
2586 asection *osec;
2587
2588 osec = sec->output_section;
2589 sindx = elf_section_data (osec)->dynindx;
2590
2591 if (sindx == 0)
2592 {
2593 osec = htab->elf.text_index_section;
2594 sindx = elf_section_data (osec)->dynindx;
2595 }
2596 BFD_ASSERT (sindx != 0);
2597
2598 /* We are turning this relocation into one
2599 against a section symbol, so subtract out
2600 the output section's address but not the
2601 offset of the input section in the output
2602 section. */
2603 outrel.r_addend -= osec->vma;
2604 }
2605 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2606 }
2607 }
2608
2609 sreloc = elf_section_data (input_section)->sreloc;
2610 if (sreloc == NULL)
2611 abort ();
2612
2613 loc = sreloc->contents;
2614 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2615 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2616
2617 /* If this reloc is against an external symbol, we do
2618 not want to fiddle with the addend. Otherwise, we
2619 need to include the symbol value so that it becomes
2620 an addend for the dynamic reloc. */
2621 if (! relocate)
2622 continue;
2623 }
2624
2625 break;
2626
2627 /* Relocations for tls literal pool entries. */
2628 case R_390_TLS_IE64:
2629 if (info->shared)
2630 {
2631 Elf_Internal_Rela outrel;
2632 asection *sreloc;
2633 bfd_byte *loc;
2634
2635 outrel.r_offset = rel->r_offset
2636 + input_section->output_section->vma
2637 + input_section->output_offset;
2638 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2639 sreloc = elf_section_data (input_section)->sreloc;
2640 if (sreloc == NULL)
2641 abort ();
2642 loc = sreloc->contents;
2643 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2644 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2645 }
2646 /* Fall through. */
2647
2648 case R_390_TLS_GD64:
2649 case R_390_TLS_GOTIE64:
2650 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2651 tls_type = GOT_UNKNOWN;
2652 if (h == NULL && local_got_offsets)
2653 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2654 else if (h != NULL)
2655 {
2656 tls_type = elf_s390_hash_entry(h)->tls_type;
2657 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2658 r_type = R_390_TLS_LE64;
2659 }
2660 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2661 r_type = R_390_TLS_IE64;
2662
2663 if (r_type == R_390_TLS_LE64)
2664 {
2665 /* This relocation gets optimized away by the local exec
2666 access optimization. */
2667 BFD_ASSERT (! unresolved_reloc);
2668 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2669 contents + rel->r_offset);
2670 continue;
2671 }
2672
2673 if (htab->sgot == NULL)
2674 abort ();
2675
2676 if (h != NULL)
2677 off = h->got.offset;
2678 else
2679 {
2680 if (local_got_offsets == NULL)
2681 abort ();
2682
2683 off = local_got_offsets[r_symndx];
2684 }
2685
2686 emit_tls_relocs:
2687
2688 if ((off & 1) != 0)
2689 off &= ~1;
2690 else
2691 {
2692 Elf_Internal_Rela outrel;
2693 bfd_byte *loc;
2694 int dr_type, indx;
2695
2696 if (htab->srelgot == NULL)
2697 abort ();
2698
2699 outrel.r_offset = (htab->sgot->output_section->vma
2700 + htab->sgot->output_offset + off);
2701
2702 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2703 if (r_type == R_390_TLS_GD64)
2704 dr_type = R_390_TLS_DTPMOD;
2705 else
2706 dr_type = R_390_TLS_TPOFF;
2707 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2708 outrel.r_addend = relocation - dtpoff_base (info);
2709 else
2710 outrel.r_addend = 0;
2711 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2712 loc = htab->srelgot->contents;
2713 loc += htab->srelgot->reloc_count++
2714 * sizeof (Elf64_External_Rela);
2715 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2716
2717 if (r_type == R_390_TLS_GD64)
2718 {
2719 if (indx == 0)
2720 {
2721 BFD_ASSERT (! unresolved_reloc);
2722 bfd_put_64 (output_bfd,
2723 relocation - dtpoff_base (info),
2724 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2725 }
2726 else
2727 {
2728 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2729 outrel.r_offset += GOT_ENTRY_SIZE;
2730 outrel.r_addend = 0;
2731 htab->srelgot->reloc_count++;
2732 loc += sizeof (Elf64_External_Rela);
2733 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2734 }
2735 }
2736
2737 if (h != NULL)
2738 h->got.offset |= 1;
2739 else
2740 local_got_offsets[r_symndx] |= 1;
2741 }
2742
2743 if (off >= (bfd_vma) -2)
2744 abort ();
2745 if (r_type == ELF64_R_TYPE (rel->r_info))
2746 {
2747 relocation = htab->sgot->output_offset + off;
2748 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2749 relocation += htab->sgot->output_section->vma;
2750 unresolved_reloc = FALSE;
2751 }
2752 else
2753 {
2754 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2755 contents + rel->r_offset);
2756 continue;
2757 }
2758 break;
2759
2760 case R_390_TLS_GOTIE12:
2761 case R_390_TLS_GOTIE20:
2762 case R_390_TLS_IEENT:
2763 if (h == NULL)
2764 {
2765 if (local_got_offsets == NULL)
2766 abort();
2767 off = local_got_offsets[r_symndx];
2768 if (info->shared)
2769 goto emit_tls_relocs;
2770 }
2771 else
2772 {
2773 off = h->got.offset;
2774 tls_type = elf_s390_hash_entry(h)->tls_type;
2775 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2776 goto emit_tls_relocs;
2777 }
2778
2779 if (htab->sgot == NULL)
2780 abort ();
2781
2782 BFD_ASSERT (! unresolved_reloc);
2783 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2784 htab->sgot->contents + off);
2785 relocation = htab->sgot->output_offset + off;
2786 if (r_type == R_390_TLS_IEENT)
2787 relocation += htab->sgot->output_section->vma;
2788 unresolved_reloc = FALSE;
2789 break;
2790
2791 case R_390_TLS_LDM64:
2792 if (! info->shared)
2793 /* The literal pool entry this relocation refers to gets ignored
2794 by the optimized code of the local exec model. Do nothing
2795 and the value will turn out zero. */
2796 continue;
2797
2798 if (htab->sgot == NULL)
2799 abort ();
2800
2801 off = htab->tls_ldm_got.offset;
2802 if (off & 1)
2803 off &= ~1;
2804 else
2805 {
2806 Elf_Internal_Rela outrel;
2807 bfd_byte *loc;
2808
2809 if (htab->srelgot == NULL)
2810 abort ();
2811
2812 outrel.r_offset = (htab->sgot->output_section->vma
2813 + htab->sgot->output_offset + off);
2814
2815 bfd_put_64 (output_bfd, 0,
2816 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2817 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2818 outrel.r_addend = 0;
2819 loc = htab->srelgot->contents;
2820 loc += htab->srelgot->reloc_count++
2821 * sizeof (Elf64_External_Rela);
2822 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2823 htab->tls_ldm_got.offset |= 1;
2824 }
2825 relocation = htab->sgot->output_offset + off;
2826 unresolved_reloc = FALSE;
2827 break;
2828
2829 case R_390_TLS_LE64:
2830 if (info->shared)
2831 {
2832 /* Linking a shared library with non-fpic code requires
2833 a R_390_TLS_TPOFF relocation. */
2834 Elf_Internal_Rela outrel;
2835 asection *sreloc;
2836 bfd_byte *loc;
2837 int indx;
2838
2839 outrel.r_offset = rel->r_offset
2840 + input_section->output_section->vma
2841 + input_section->output_offset;
2842 if (h != NULL && h->dynindx != -1)
2843 indx = h->dynindx;
2844 else
2845 indx = 0;
2846 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2847 if (indx == 0)
2848 outrel.r_addend = relocation - dtpoff_base (info);
2849 else
2850 outrel.r_addend = 0;
2851 sreloc = elf_section_data (input_section)->sreloc;
2852 if (sreloc == NULL)
2853 abort ();
2854 loc = sreloc->contents;
2855 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2856 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2857 }
2858 else
2859 {
2860 BFD_ASSERT (! unresolved_reloc);
2861 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2862 contents + rel->r_offset);
2863 }
2864 continue;
2865
2866 case R_390_TLS_LDO64:
2867 if (info->shared)
2868 relocation -= dtpoff_base (info);
2869 else
2870 /* When converting LDO to LE, we must negate. */
2871 relocation = -tpoff (info, relocation);
2872 break;
2873
2874 /* Relocations for tls instructions. */
2875 case R_390_TLS_LOAD:
2876 case R_390_TLS_GDCALL:
2877 case R_390_TLS_LDCALL:
2878 tls_type = GOT_UNKNOWN;
2879 if (h == NULL && local_got_offsets)
2880 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2881 else if (h != NULL)
2882 tls_type = elf_s390_hash_entry(h)->tls_type;
2883
2884 if (tls_type == GOT_TLS_GD)
2885 continue;
2886
2887 if (r_type == R_390_TLS_LOAD)
2888 {
2889 if (!info->shared && (h == NULL || h->dynindx == -1))
2890 {
2891 /* IE->LE transition. Four valid cases:
2892 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2893 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2894 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2895 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2896 unsigned int insn0, insn1, ry;
2897
2898 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2899 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2900 if (insn1 != 0x0004)
2901 invalid_tls_insn (input_bfd, input_section, rel);
2902 ry = 0;
2903 if ((insn0 & 0xff00f000) == 0xe3000000)
2904 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2905 ry = (insn0 & 0x000f0000);
2906 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2907 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2908 ry = (insn0 & 0x0000f000) << 4;
2909 else if ((insn0 & 0xff00f000) == 0xe300c000)
2910 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2911 ry = (insn0 & 0x000f0000);
2912 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2913 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2914 ry = (insn0 & 0x0000f000) << 4;
2915 else
2916 invalid_tls_insn (input_bfd, input_section, rel);
2917 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2918 insn1 = 0x000d;
2919 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2920 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2921 }
2922 }
2923 else if (r_type == R_390_TLS_GDCALL)
2924 {
2925 unsigned int insn0, insn1;
2926
2927 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2928 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2929 if ((insn0 & 0xffff0000) != 0xc0e50000)
2930 invalid_tls_insn (input_bfd, input_section, rel);
2931 if (!info->shared && (h == NULL || h->dynindx == -1))
2932 {
2933 /* GD->LE transition.
2934 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2935 insn0 = 0xc0040000;
2936 insn1 = 0x0000;
2937 }
2938 else
2939 {
2940 /* GD->IE transition.
2941 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2942 insn0 = 0xe322c000;
2943 insn1 = 0x0004;
2944 }
2945 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2946 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2947 }
2948 else if (r_type == R_390_TLS_LDCALL)
2949 {
2950 if (!info->shared)
2951 {
2952 unsigned int insn0, insn1;
2953
2954 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2955 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2956 if ((insn0 & 0xffff0000) != 0xc0e50000)
2957 invalid_tls_insn (input_bfd, input_section, rel);
2958 /* LD->LE transition.
2959 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2960 insn0 = 0xc0040000;
2961 insn1 = 0x0000;
2962 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2963 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2964 }
2965 }
2966 continue;
2967
2968 default:
2969 break;
2970 }
2971
2972 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2973 because such sections are not SEC_ALLOC and thus ld.so will
2974 not process them. */
2975 if (unresolved_reloc
2976 && !((input_section->flags & SEC_DEBUGGING) != 0
2977 && h->def_dynamic))
2978 (*_bfd_error_handler)
2979 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
2980 input_bfd,
2981 input_section,
2982 (long) rel->r_offset,
2983 howto->name,
2984 h->root.root.string);
2985
2986 if (r_type == R_390_20
2987 || r_type == R_390_GOT20
2988 || r_type == R_390_GOTPLT20
2989 || r_type == R_390_TLS_GOTIE20)
2990 {
2991 relocation += rel->r_addend;
2992 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2993 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2994 contents, rel->r_offset,
2995 relocation, 0);
2996 }
2997 else
2998 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
2999 contents, rel->r_offset,
3000 relocation, rel->r_addend);
3001
3002 if (r != bfd_reloc_ok)
3003 {
3004 const char *name;
3005
3006 if (h != NULL)
3007 name = h->root.root.string;
3008 else
3009 {
3010 name = bfd_elf_string_from_elf_section (input_bfd,
3011 symtab_hdr->sh_link,
3012 sym->st_name);
3013 if (name == NULL)
3014 return FALSE;
3015 if (*name == '\0')
3016 name = bfd_section_name (input_bfd, sec);
3017 }
3018
3019 if (r == bfd_reloc_overflow)
3020 {
3021
3022 if (! ((*info->callbacks->reloc_overflow)
3023 (info, (h ? &h->root : NULL), name, howto->name,
3024 (bfd_vma) 0, input_bfd, input_section,
3025 rel->r_offset)))
3026 return FALSE;
3027 }
3028 else
3029 {
3030 (*_bfd_error_handler)
3031 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3032 input_bfd, input_section,
3033 (long) rel->r_offset, name, (int) r);
3034 return FALSE;
3035 }
3036 }
3037 }
3038
3039 return TRUE;
3040 }
3041
3042 /* Finish up dynamic symbol handling. We set the contents of various
3043 dynamic sections here. */
3044
3045 static bfd_boolean
3046 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3047 bfd *output_bfd;
3048 struct bfd_link_info *info;
3049 struct elf_link_hash_entry *h;
3050 Elf_Internal_Sym *sym;
3051 {
3052 struct elf_s390_link_hash_table *htab;
3053
3054 htab = elf_s390_hash_table (info);
3055
3056 if (h->plt.offset != (bfd_vma) -1)
3057 {
3058 bfd_vma plt_index;
3059 bfd_vma got_offset;
3060 Elf_Internal_Rela rela;
3061 bfd_byte *loc;
3062
3063 /* This symbol has an entry in the procedure linkage table. Set
3064 it up. */
3065
3066 if (h->dynindx == -1
3067 || htab->splt == NULL
3068 || htab->sgotplt == NULL
3069 || htab->srelplt == NULL)
3070 abort ();
3071
3072 /* Calc. index no.
3073 Current offset - size first entry / entry size. */
3074 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3075
3076 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3077 addr & GOT addr. */
3078 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3079
3080 /* Fill in the blueprint of a PLT. */
3081 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3082 htab->splt->contents + h->plt.offset);
3083 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3084 htab->splt->contents + h->plt.offset + 4);
3085 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3086 htab->splt->contents + h->plt.offset + 8);
3087 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3088 htab->splt->contents + h->plt.offset + 12);
3089 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3090 htab->splt->contents + h->plt.offset + 16);
3091 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3092 htab->splt->contents + h->plt.offset + 20);
3093 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3094 htab->splt->contents + h->plt.offset + 24);
3095 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3096 htab->splt->contents + h->plt.offset + 28);
3097 /* Fixup the relative address to the GOT entry */
3098 bfd_put_32 (output_bfd,
3099 (htab->sgotplt->output_section->vma +
3100 htab->sgotplt->output_offset + got_offset
3101 - (htab->splt->output_section->vma + h->plt.offset))/2,
3102 htab->splt->contents + h->plt.offset + 2);
3103 /* Fixup the relative branch to PLT 0 */
3104 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3105 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3106 htab->splt->contents + h->plt.offset + 24);
3107 /* Fixup offset into symbol table */
3108 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3109 htab->splt->contents + h->plt.offset + 28);
3110
3111 /* Fill in the entry in the global offset table.
3112 Points to instruction after GOT offset. */
3113 bfd_put_64 (output_bfd,
3114 (htab->splt->output_section->vma
3115 + htab->splt->output_offset
3116 + h->plt.offset
3117 + 14),
3118 htab->sgotplt->contents + got_offset);
3119
3120 /* Fill in the entry in the .rela.plt section. */
3121 rela.r_offset = (htab->sgotplt->output_section->vma
3122 + htab->sgotplt->output_offset
3123 + got_offset);
3124 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3125 rela.r_addend = 0;
3126 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3127 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3128
3129 if (!h->def_regular)
3130 {
3131 /* Mark the symbol as undefined, rather than as defined in
3132 the .plt section. Leave the value alone. This is a clue
3133 for the dynamic linker, to make function pointer
3134 comparisons work between an application and shared
3135 library. */
3136 sym->st_shndx = SHN_UNDEF;
3137 }
3138 }
3139
3140 if (h->got.offset != (bfd_vma) -1
3141 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3142 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3143 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3144 {
3145 Elf_Internal_Rela rela;
3146 bfd_byte *loc;
3147
3148 /* This symbol has an entry in the global offset table. Set it
3149 up. */
3150 if (htab->sgot == NULL || htab->srelgot == NULL)
3151 abort ();
3152
3153 rela.r_offset = (htab->sgot->output_section->vma
3154 + htab->sgot->output_offset
3155 + (h->got.offset &~ (bfd_vma) 1));
3156
3157 /* If this is a static link, or it is a -Bsymbolic link and the
3158 symbol is defined locally or was forced to be local because
3159 of a version file, we just want to emit a RELATIVE reloc.
3160 The entry in the global offset table will already have been
3161 initialized in the relocate_section function. */
3162 if (info->shared
3163 && SYMBOL_REFERENCES_LOCAL (info, h))
3164 {
3165 if (!h->def_regular)
3166 return FALSE;
3167 BFD_ASSERT((h->got.offset & 1) != 0);
3168 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3169 rela.r_addend = (h->root.u.def.value
3170 + h->root.u.def.section->output_section->vma
3171 + h->root.u.def.section->output_offset);
3172 }
3173 else
3174 {
3175 BFD_ASSERT((h->got.offset & 1) == 0);
3176 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3177 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3178 rela.r_addend = 0;
3179 }
3180
3181 loc = htab->srelgot->contents;
3182 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3183 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3184 }
3185
3186 if (h->needs_copy)
3187 {
3188 Elf_Internal_Rela rela;
3189 bfd_byte *loc;
3190
3191 /* This symbols needs a copy reloc. Set it up. */
3192
3193 if (h->dynindx == -1
3194 || (h->root.type != bfd_link_hash_defined
3195 && h->root.type != bfd_link_hash_defweak)
3196 || htab->srelbss == NULL)
3197 abort ();
3198
3199 rela.r_offset = (h->root.u.def.value
3200 + h->root.u.def.section->output_section->vma
3201 + h->root.u.def.section->output_offset);
3202 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3203 rela.r_addend = 0;
3204 loc = htab->srelbss->contents;
3205 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3206 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3207 }
3208
3209 /* Mark some specially defined symbols as absolute. */
3210 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3211 || h == htab->elf.hgot
3212 || h == htab->elf.hplt)
3213 sym->st_shndx = SHN_ABS;
3214
3215 return TRUE;
3216 }
3217
3218 /* Used to decide how to sort relocs in an optimal manner for the
3219 dynamic linker, before writing them out. */
3220
3221 static enum elf_reloc_type_class
3222 elf_s390_reloc_type_class (rela)
3223 const Elf_Internal_Rela *rela;
3224 {
3225 switch ((int) ELF64_R_TYPE (rela->r_info))
3226 {
3227 case R_390_RELATIVE:
3228 return reloc_class_relative;
3229 case R_390_JMP_SLOT:
3230 return reloc_class_plt;
3231 case R_390_COPY:
3232 return reloc_class_copy;
3233 default:
3234 return reloc_class_normal;
3235 }
3236 }
3237
3238 /* Finish up the dynamic sections. */
3239
3240 static bfd_boolean
3241 elf_s390_finish_dynamic_sections (output_bfd, info)
3242 bfd *output_bfd;
3243 struct bfd_link_info *info;
3244 {
3245 struct elf_s390_link_hash_table *htab;
3246 bfd *dynobj;
3247 asection *sdyn;
3248
3249 htab = elf_s390_hash_table (info);
3250 dynobj = htab->elf.dynobj;
3251 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3252
3253 if (htab->elf.dynamic_sections_created)
3254 {
3255 Elf64_External_Dyn *dyncon, *dynconend;
3256
3257 if (sdyn == NULL || htab->sgot == NULL)
3258 abort ();
3259
3260 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3261 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3262 for (; dyncon < dynconend; dyncon++)
3263 {
3264 Elf_Internal_Dyn dyn;
3265 asection *s;
3266
3267 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3268
3269 switch (dyn.d_tag)
3270 {
3271 default:
3272 continue;
3273
3274 case DT_PLTGOT:
3275 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3276 break;
3277
3278 case DT_JMPREL:
3279 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3280 break;
3281
3282 case DT_PLTRELSZ:
3283 s = htab->srelplt->output_section;
3284 dyn.d_un.d_val = s->size;
3285 break;
3286
3287 case DT_RELASZ:
3288 /* The procedure linkage table relocs (DT_JMPREL) should
3289 not be included in the overall relocs (DT_RELA).
3290 Therefore, we override the DT_RELASZ entry here to
3291 make it not include the JMPREL relocs. Since the
3292 linker script arranges for .rela.plt to follow all
3293 other relocation sections, we don't have to worry
3294 about changing the DT_RELA entry. */
3295 s = htab->srelplt->output_section;
3296 dyn.d_un.d_val -= s->size;
3297 break;
3298 }
3299
3300 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3301 }
3302
3303 /* Fill in the special first entry in the procedure linkage table. */
3304 if (htab->splt && htab->splt->size > 0)
3305 {
3306 /* fill in blueprint for plt 0 entry */
3307 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3308 htab->splt->contents );
3309 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3310 htab->splt->contents +4 );
3311 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3312 htab->splt->contents +12 );
3313 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3314 htab->splt->contents +16 );
3315 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3316 htab->splt->contents +20 );
3317 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3318 htab->splt->contents + 24);
3319 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3320 htab->splt->contents + 28 );
3321 /* Fixup relative address to start of GOT */
3322 bfd_put_32 (output_bfd,
3323 (htab->sgotplt->output_section->vma +
3324 htab->sgotplt->output_offset
3325 - htab->splt->output_section->vma - 6)/2,
3326 htab->splt->contents + 8);
3327 }
3328 elf_section_data (htab->splt->output_section)
3329 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3330 }
3331
3332 if (htab->sgotplt)
3333 {
3334 /* Fill in the first three entries in the global offset table. */
3335 if (htab->sgotplt->size > 0)
3336 {
3337 bfd_put_64 (output_bfd,
3338 (sdyn == NULL ? (bfd_vma) 0
3339 : sdyn->output_section->vma + sdyn->output_offset),
3340 htab->sgotplt->contents);
3341 /* One entry for shared object struct ptr. */
3342 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3343 /* One entry for _dl_runtime_resolve. */
3344 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3345 }
3346
3347 elf_section_data (htab->sgot->output_section)
3348 ->this_hdr.sh_entsize = 8;
3349 }
3350 return TRUE;
3351 }
3352
3353 /* Return address for Ith PLT stub in section PLT, for relocation REL
3354 or (bfd_vma) -1 if it should not be included. */
3355
3356 static bfd_vma
3357 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3358 const arelent *rel ATTRIBUTE_UNUSED)
3359 {
3360 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3361 }
3362
3363
3364 /* Why was the hash table entry size definition changed from
3365 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3366 this is the only reason for the s390_elf64_size_info structure. */
3367
3368 const struct elf_size_info s390_elf64_size_info =
3369 {
3370 sizeof (Elf64_External_Ehdr),
3371 sizeof (Elf64_External_Phdr),
3372 sizeof (Elf64_External_Shdr),
3373 sizeof (Elf64_External_Rel),
3374 sizeof (Elf64_External_Rela),
3375 sizeof (Elf64_External_Sym),
3376 sizeof (Elf64_External_Dyn),
3377 sizeof (Elf_External_Note),
3378 8, /* hash-table entry size. */
3379 1, /* internal relocations per external relocations. */
3380 64, /* arch_size. */
3381 3, /* log_file_align. */
3382 ELFCLASS64, EV_CURRENT,
3383 bfd_elf64_write_out_phdrs,
3384 bfd_elf64_write_shdrs_and_ehdr,
3385 bfd_elf64_checksum_contents,
3386 bfd_elf64_write_relocs,
3387 bfd_elf64_swap_symbol_in,
3388 bfd_elf64_swap_symbol_out,
3389 bfd_elf64_slurp_reloc_table,
3390 bfd_elf64_slurp_symbol_table,
3391 bfd_elf64_swap_dyn_in,
3392 bfd_elf64_swap_dyn_out,
3393 bfd_elf64_swap_reloc_in,
3394 bfd_elf64_swap_reloc_out,
3395 bfd_elf64_swap_reloca_in,
3396 bfd_elf64_swap_reloca_out
3397 };
3398
3399 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3400 #define TARGET_BIG_NAME "elf64-s390"
3401 #define ELF_ARCH bfd_arch_s390
3402 #define ELF_MACHINE_CODE EM_S390
3403 #define ELF_MACHINE_ALT1 EM_S390_OLD
3404 #define ELF_MAXPAGESIZE 0x1000
3405
3406 #define elf_backend_size_info s390_elf64_size_info
3407
3408 #define elf_backend_can_gc_sections 1
3409 #define elf_backend_can_refcount 1
3410 #define elf_backend_want_got_plt 1
3411 #define elf_backend_plt_readonly 1
3412 #define elf_backend_want_plt_sym 0
3413 #define elf_backend_got_header_size 24
3414 #define elf_backend_rela_normal 1
3415
3416 #define elf_info_to_howto elf_s390_info_to_howto
3417
3418 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3419 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3420 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3421 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3422
3423 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3424 #define elf_backend_check_relocs elf_s390_check_relocs
3425 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3426 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3427 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3428 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3429 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3430 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3431 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3432 #define elf_backend_relocate_section elf_s390_relocate_section
3433 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3434 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3435 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3436 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3437
3438 #define bfd_elf64_mkobject elf_s390_mkobject
3439 #define elf_backend_object_p elf_s390_object_p
3440
3441 #include "elf64-target.h"
GDB Binutils - Deliverables
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