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[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
4
5 This file is part of BFD, the Binary File Descriptor library.
6
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
11
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
16
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
20 02111-1307, USA. */
21
22 #include "bfd.h"
23 #include "sysdep.h"
24 #include "bfdlink.h"
25 #include "libbfd.h"
26 #include "elf-bfd.h"
27
28 static reloc_howto_type *elf_s390_reloc_type_lookup
29 PARAMS ((bfd *, bfd_reloc_code_real_type));
30 static void elf_s390_info_to_howto
31 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
32 static bfd_boolean elf_s390_is_local_label_name
33 PARAMS ((bfd *, const char *));
34 static struct bfd_hash_entry *link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
36 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
37 PARAMS ((bfd *));
38 static bfd_boolean create_got_section
39 PARAMS((bfd *, struct bfd_link_info *));
40 static bfd_boolean elf_s390_create_dynamic_sections
41 PARAMS((bfd *, struct bfd_link_info *));
42 static void elf_s390_copy_indirect_symbol
43 PARAMS ((const struct elf_backend_data *, struct elf_link_hash_entry *,
44 struct elf_link_hash_entry *));
45 static bfd_boolean elf_s390_check_relocs
46 PARAMS ((bfd *, struct bfd_link_info *, asection *,
47 const Elf_Internal_Rela *));
48 static asection *elf_s390_gc_mark_hook
49 PARAMS ((asection *, struct bfd_link_info *, Elf_Internal_Rela *,
50 struct elf_link_hash_entry *, Elf_Internal_Sym *));
51 static bfd_boolean elf_s390_gc_sweep_hook
52 PARAMS ((bfd *, struct bfd_link_info *, asection *,
53 const Elf_Internal_Rela *));
54 struct elf_s390_link_hash_entry;
55 static void elf_s390_adjust_gotplt
56 PARAMS ((struct elf_s390_link_hash_entry *));
57 static bfd_boolean elf_s390_adjust_dynamic_symbol
58 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
59 static bfd_boolean allocate_dynrelocs
60 PARAMS ((struct elf_link_hash_entry *, PTR));
61 static bfd_boolean readonly_dynrelocs
62 PARAMS ((struct elf_link_hash_entry *, PTR));
63 static bfd_boolean elf_s390_size_dynamic_sections
64 PARAMS ((bfd *, struct bfd_link_info *));
65 static bfd_boolean elf_s390_relocate_section
66 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
67 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
68 static bfd_boolean elf_s390_finish_dynamic_symbol
69 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
70 Elf_Internal_Sym *));
71 static enum elf_reloc_type_class elf_s390_reloc_type_class
72 PARAMS ((const Elf_Internal_Rela *));
73 static bfd_boolean elf_s390_finish_dynamic_sections
74 PARAMS ((bfd *, struct bfd_link_info *));
75 static bfd_boolean elf_s390_mkobject
76 PARAMS ((bfd *));
77 static bfd_boolean elf_s390_object_p
78 PARAMS ((bfd *));
79 static int elf_s390_tls_transition
80 PARAMS ((struct bfd_link_info *, int, int));
81 static bfd_reloc_status_type s390_tls_reloc
82 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
83 static bfd_vma dtpoff_base
84 PARAMS ((struct bfd_link_info *));
85 static bfd_vma tpoff
86 PARAMS ((struct bfd_link_info *, bfd_vma));
87 static void invalid_tls_insn
88 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
89 static bfd_reloc_status_type s390_elf_ldisp_reloc
90 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
91
92 #include "elf/s390.h"
93
94 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
95 from smaller values. Start with zero, widen, *then* decrement. */
96 #define MINUS_ONE (((bfd_vma)0) - 1)
97
98 /* The relocation "howto" table. */
99 static reloc_howto_type elf_howto_table[] =
100 {
101 HOWTO (R_390_NONE, /* type */
102 0, /* rightshift */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
104 0, /* bitsize */
105 FALSE, /* pc_relative */
106 0, /* bitpos */
107 complain_overflow_dont, /* complain_on_overflow */
108 bfd_elf_generic_reloc, /* special_function */
109 "R_390_NONE", /* name */
110 FALSE, /* partial_inplace */
111 0, /* src_mask */
112 0, /* dst_mask */
113 FALSE), /* pcrel_offset */
114
115 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
117 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
118 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
119 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
121 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
123 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
125 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
127 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
131 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
133 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
134 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
135 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
136 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
137 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
139 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
140 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
141 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
142 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
143 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
145 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
147 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
148 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
149 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
151 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
153 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
155 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
156 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
157 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
159 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
161 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
163 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
165 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
166 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
167 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
168 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
169 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
170 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
171 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
172 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
173 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
175 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
177 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
179 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
181 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
183 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
184 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
185 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
186 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
187 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
188 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
189 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
190 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
191 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
192 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
193 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
194 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
195 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
196 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
197 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
198 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
199 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
200 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
201 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
202 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
203 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
204 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
205 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
206 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
207 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
208 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
209 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
210 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
212 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
213 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
214 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
215 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
216 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
217 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
218 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
219 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
220 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
221 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
222 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
223 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
224 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
225 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
226 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
227 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
228 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
229 };
230
231 /* GNU extension to record C++ vtable hierarchy. */
232 static reloc_howto_type elf64_s390_vtinherit_howto =
233 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
234 static reloc_howto_type elf64_s390_vtentry_howto =
235 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);
236
237 static reloc_howto_type *
238 elf_s390_reloc_type_lookup (abfd, code)
239 bfd *abfd ATTRIBUTE_UNUSED;
240 bfd_reloc_code_real_type code;
241 {
242 switch (code)
243 {
244 case BFD_RELOC_NONE:
245 return &elf_howto_table[(int) R_390_NONE];
246 case BFD_RELOC_8:
247 return &elf_howto_table[(int) R_390_8];
248 case BFD_RELOC_390_12:
249 return &elf_howto_table[(int) R_390_12];
250 case BFD_RELOC_16:
251 return &elf_howto_table[(int) R_390_16];
252 case BFD_RELOC_32:
253 return &elf_howto_table[(int) R_390_32];
254 case BFD_RELOC_CTOR:
255 return &elf_howto_table[(int) R_390_32];
256 case BFD_RELOC_32_PCREL:
257 return &elf_howto_table[(int) R_390_PC32];
258 case BFD_RELOC_390_GOT12:
259 return &elf_howto_table[(int) R_390_GOT12];
260 case BFD_RELOC_32_GOT_PCREL:
261 return &elf_howto_table[(int) R_390_GOT32];
262 case BFD_RELOC_390_PLT32:
263 return &elf_howto_table[(int) R_390_PLT32];
264 case BFD_RELOC_390_COPY:
265 return &elf_howto_table[(int) R_390_COPY];
266 case BFD_RELOC_390_GLOB_DAT:
267 return &elf_howto_table[(int) R_390_GLOB_DAT];
268 case BFD_RELOC_390_JMP_SLOT:
269 return &elf_howto_table[(int) R_390_JMP_SLOT];
270 case BFD_RELOC_390_RELATIVE:
271 return &elf_howto_table[(int) R_390_RELATIVE];
272 case BFD_RELOC_32_GOTOFF:
273 return &elf_howto_table[(int) R_390_GOTOFF32];
274 case BFD_RELOC_390_GOTPC:
275 return &elf_howto_table[(int) R_390_GOTPC];
276 case BFD_RELOC_390_GOT16:
277 return &elf_howto_table[(int) R_390_GOT16];
278 case BFD_RELOC_16_PCREL:
279 return &elf_howto_table[(int) R_390_PC16];
280 case BFD_RELOC_390_PC16DBL:
281 return &elf_howto_table[(int) R_390_PC16DBL];
282 case BFD_RELOC_390_PLT16DBL:
283 return &elf_howto_table[(int) R_390_PLT16DBL];
284 case BFD_RELOC_390_PC32DBL:
285 return &elf_howto_table[(int) R_390_PC32DBL];
286 case BFD_RELOC_390_PLT32DBL:
287 return &elf_howto_table[(int) R_390_PLT32DBL];
288 case BFD_RELOC_390_GOTPCDBL:
289 return &elf_howto_table[(int) R_390_GOTPCDBL];
290 case BFD_RELOC_64:
291 return &elf_howto_table[(int) R_390_64];
292 case BFD_RELOC_64_PCREL:
293 return &elf_howto_table[(int) R_390_PC64];
294 case BFD_RELOC_390_GOT64:
295 return &elf_howto_table[(int) R_390_GOT64];
296 case BFD_RELOC_390_PLT64:
297 return &elf_howto_table[(int) R_390_PLT64];
298 case BFD_RELOC_390_GOTENT:
299 return &elf_howto_table[(int) R_390_GOTENT];
300 case BFD_RELOC_16_GOTOFF:
301 return &elf_howto_table[(int) R_390_GOTOFF16];
302 case BFD_RELOC_390_GOTOFF64:
303 return &elf_howto_table[(int) R_390_GOTOFF64];
304 case BFD_RELOC_390_GOTPLT12:
305 return &elf_howto_table[(int) R_390_GOTPLT12];
306 case BFD_RELOC_390_GOTPLT16:
307 return &elf_howto_table[(int) R_390_GOTPLT16];
308 case BFD_RELOC_390_GOTPLT32:
309 return &elf_howto_table[(int) R_390_GOTPLT32];
310 case BFD_RELOC_390_GOTPLT64:
311 return &elf_howto_table[(int) R_390_GOTPLT64];
312 case BFD_RELOC_390_GOTPLTENT:
313 return &elf_howto_table[(int) R_390_GOTPLTENT];
314 case BFD_RELOC_390_PLTOFF16:
315 return &elf_howto_table[(int) R_390_PLTOFF16];
316 case BFD_RELOC_390_PLTOFF32:
317 return &elf_howto_table[(int) R_390_PLTOFF32];
318 case BFD_RELOC_390_PLTOFF64:
319 return &elf_howto_table[(int) R_390_PLTOFF64];
320 case BFD_RELOC_390_TLS_LOAD:
321 return &elf_howto_table[(int) R_390_TLS_LOAD];
322 case BFD_RELOC_390_TLS_GDCALL:
323 return &elf_howto_table[(int) R_390_TLS_GDCALL];
324 case BFD_RELOC_390_TLS_LDCALL:
325 return &elf_howto_table[(int) R_390_TLS_LDCALL];
326 case BFD_RELOC_390_TLS_GD64:
327 return &elf_howto_table[(int) R_390_TLS_GD64];
328 case BFD_RELOC_390_TLS_GOTIE12:
329 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
330 case BFD_RELOC_390_TLS_GOTIE64:
331 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
332 case BFD_RELOC_390_TLS_LDM64:
333 return &elf_howto_table[(int) R_390_TLS_LDM64];
334 case BFD_RELOC_390_TLS_IE64:
335 return &elf_howto_table[(int) R_390_TLS_IE64];
336 case BFD_RELOC_390_TLS_IEENT:
337 return &elf_howto_table[(int) R_390_TLS_IEENT];
338 case BFD_RELOC_390_TLS_LE64:
339 return &elf_howto_table[(int) R_390_TLS_LE64];
340 case BFD_RELOC_390_TLS_LDO64:
341 return &elf_howto_table[(int) R_390_TLS_LDO64];
342 case BFD_RELOC_390_TLS_DTPMOD:
343 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
344 case BFD_RELOC_390_TLS_DTPOFF:
345 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
346 case BFD_RELOC_390_TLS_TPOFF:
347 return &elf_howto_table[(int) R_390_TLS_TPOFF];
348 case BFD_RELOC_390_20:
349 return &elf_howto_table[(int) R_390_20];
350 case BFD_RELOC_390_GOT20:
351 return &elf_howto_table[(int) R_390_GOT20];
352 case BFD_RELOC_390_GOTPLT20:
353 return &elf_howto_table[(int) R_390_GOTPLT20];
354 case BFD_RELOC_390_TLS_GOTIE20:
355 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
356 case BFD_RELOC_VTABLE_INHERIT:
357 return &elf64_s390_vtinherit_howto;
358 case BFD_RELOC_VTABLE_ENTRY:
359 return &elf64_s390_vtentry_howto;
360 default:
361 break;
362 }
363 return 0;
364 }
365
366 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
367 and elf64-s390.c has its own copy. */
368
369 static void
370 elf_s390_info_to_howto (abfd, cache_ptr, dst)
371 bfd *abfd ATTRIBUTE_UNUSED;
372 arelent *cache_ptr;
373 Elf_Internal_Rela *dst;
374 {
375 switch (ELF64_R_TYPE(dst->r_info))
376 {
377 case R_390_GNU_VTINHERIT:
378 cache_ptr->howto = &elf64_s390_vtinherit_howto;
379 break;
380
381 case R_390_GNU_VTENTRY:
382 cache_ptr->howto = &elf64_s390_vtentry_howto;
383 break;
384
385 default:
386 BFD_ASSERT (ELF64_R_TYPE(dst->r_info) < (unsigned int) R_390_max);
387 cache_ptr->howto = &elf_howto_table[ELF64_R_TYPE(dst->r_info)];
388 }
389 }
390
391 /* A relocation function which doesn't do anything. */
392 static bfd_reloc_status_type
393 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
394 output_bfd, error_message)
395 bfd *abfd ATTRIBUTE_UNUSED;
396 arelent *reloc_entry;
397 asymbol *symbol ATTRIBUTE_UNUSED;
398 PTR data ATTRIBUTE_UNUSED;
399 asection *input_section;
400 bfd *output_bfd;
401 char **error_message ATTRIBUTE_UNUSED;
402 {
403 if (output_bfd)
404 reloc_entry->address += input_section->output_offset;
405 return bfd_reloc_ok;
406 }
407
408 /* Handle the large displacement relocs. */
409 static bfd_reloc_status_type
410 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
411 output_bfd, error_message)
412 bfd *abfd;
413 arelent *reloc_entry;
414 asymbol *symbol;
415 PTR data;
416 asection *input_section;
417 bfd *output_bfd;
418 char **error_message ATTRIBUTE_UNUSED;
419 {
420 reloc_howto_type *howto = reloc_entry->howto;
421 bfd_vma relocation;
422 bfd_vma insn;
423
424 if (output_bfd != (bfd *) NULL
425 && (symbol->flags & BSF_SECTION_SYM) == 0
426 && (! howto->partial_inplace
427 || reloc_entry->addend == 0))
428 {
429 reloc_entry->address += input_section->output_offset;
430 return bfd_reloc_ok;
431 }
432 if (output_bfd != NULL)
433 return bfd_reloc_continue;
434
435 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
436 return bfd_reloc_outofrange;
437
438 relocation = (symbol->value
439 + symbol->section->output_section->vma
440 + symbol->section->output_offset);
441 relocation += reloc_entry->addend;
442 if (howto->pc_relative)
443 {
444 relocation -= (input_section->output_section->vma
445 + input_section->output_offset);
446 relocation -= reloc_entry->address;
447 }
448
449 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
450 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
451 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
452
453 if ((bfd_signed_vma) relocation < - 0x80000
454 || (bfd_signed_vma) relocation > 0x7ffff)
455 return bfd_reloc_overflow;
456 else
457 return bfd_reloc_ok;
458 }
459
460 static bfd_boolean
461 elf_s390_is_local_label_name (abfd, name)
462 bfd *abfd;
463 const char *name;
464 {
465 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
466 return TRUE;
467
468 return _bfd_elf_is_local_label_name (abfd, name);
469 }
470
471 /* Functions for the 390 ELF linker. */
472
473 /* The name of the dynamic interpreter. This is put in the .interp
474 section. */
475
476 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
477
478 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
479 copying dynamic variables from a shared lib into an app's dynbss
480 section, and instead use a dynamic relocation to point into the
481 shared lib. */
482 #define ELIMINATE_COPY_RELOCS 1
483
484 /* The size in bytes of the first entry in the procedure linkage table. */
485 #define PLT_FIRST_ENTRY_SIZE 32
486 /* The size in bytes of an entry in the procedure linkage table. */
487 #define PLT_ENTRY_SIZE 32
488
489 #define GOT_ENTRY_SIZE 8
490
491 /* The first three entries in a procedure linkage table are reserved,
492 and the initial contents are unimportant (we zero them out).
493 Subsequent entries look like this. See the SVR4 ABI 386
494 supplement to see how this works. */
495
496 /* For the s390, simple addr offset can only be 0 - 4096.
497 To use the full 16777216 TB address space, several instructions
498 are needed to load an address in a register and execute
499 a branch( or just saving the address)
500
501 Furthermore, only r 0 and 1 are free to use!!! */
502
503 /* The first 3 words in the GOT are then reserved.
504 Word 0 is the address of the dynamic table.
505 Word 1 is a pointer to a structure describing the object
506 Word 2 is used to point to the loader entry address.
507
508 The code for PLT entries looks like this:
509
510 The GOT holds the address in the PLT to be executed.
511 The loader then gets:
512 24(15) = Pointer to the structure describing the object.
513 28(15) = Offset in symbol table
514 The loader must then find the module where the function is
515 and insert the address in the GOT.
516
517 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
518 LG 1,0(1) # 6 bytes Load address from GOT in r1
519 BCR 15,1 # 2 bytes Jump to address
520 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
521 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
522 BRCL 15,-x # 6 bytes Jump to start of PLT
523 .long ? # 4 bytes offset into symbol table
524
525 Total = 32 bytes per PLT entry
526 Fixup at offset 2: relative address to GOT entry
527 Fixup at offset 22: relative branch to PLT0
528 Fixup at offset 28: 32 bit offset into symbol table
529
530 A 32 bit offset into the symbol table is enough. It allows for symbol
531 tables up to a size of 2 gigabyte. A single dynamic object (the main
532 program, any shared library) is limited to 4GB in size and I want to see
533 the program that manages to have a symbol table of more than 2 GB with a
534 total size of at max 4 GB. */
535
536 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
537 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
538 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
539 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
540 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
541 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
542 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
543 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
544
545 /* The first PLT entry pushes the offset into the symbol table
546 from R1 onto the stack at 8(15) and the loader object info
547 at 12(15), loads the loader address in R1 and jumps to it. */
548
549 /* The first entry in the PLT:
550
551 PLT0:
552 STG 1,56(15) # r1 contains the offset into the symbol table
553 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
554 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
555 LG 1,16(1) # get entry address of loader
556 BCR 15,1 # jump to loader
557
558 Fixup at offset 8: relative address to start of GOT. */
559
560 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
561 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
562 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
563 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
564 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
565 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
566 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
567 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
568
569 /* The s390 linker needs to keep track of the number of relocs that it
570 decides to copy as dynamic relocs in check_relocs for each symbol.
571 This is so that it can later discard them if they are found to be
572 unnecessary. We store the information in a field extending the
573 regular ELF linker hash table. */
574
575 struct elf_s390_dyn_relocs
576 {
577 struct elf_s390_dyn_relocs *next;
578
579 /* The input section of the reloc. */
580 asection *sec;
581
582 /* Total number of relocs copied for the input section. */
583 bfd_size_type count;
584
585 /* Number of pc-relative relocs copied for the input section. */
586 bfd_size_type pc_count;
587 };
588
589 /* s390 ELF linker hash entry. */
590
591 struct elf_s390_link_hash_entry
592 {
593 struct elf_link_hash_entry elf;
594
595 /* Track dynamic relocs copied for this symbol. */
596 struct elf_s390_dyn_relocs *dyn_relocs;
597
598 /* Number of GOTPLT references for a function. */
599 bfd_signed_vma gotplt_refcount;
600
601 #define GOT_UNKNOWN 0
602 #define GOT_NORMAL 1
603 #define GOT_TLS_GD 2
604 #define GOT_TLS_IE 3
605 #define GOT_TLS_IE_NLT 3
606 unsigned char tls_type;
607 };
608
609 #define elf_s390_hash_entry(ent) \
610 ((struct elf_s390_link_hash_entry *)(ent))
611
612 struct elf_s390_obj_tdata
613 {
614 struct elf_obj_tdata root;
615
616 /* tls_type for each local got entry. */
617 char *local_got_tls_type;
618 };
619
620 #define elf_s390_tdata(abfd) \
621 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
622
623 #define elf_s390_local_got_tls_type(abfd) \
624 (elf_s390_tdata (abfd)->local_got_tls_type)
625
626 static bfd_boolean
627 elf_s390_mkobject (abfd)
628 bfd *abfd;
629 {
630 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
631 abfd->tdata.any = bfd_zalloc (abfd, amt);
632 if (abfd->tdata.any == NULL)
633 return FALSE;
634 return TRUE;
635 }
636
637 static bfd_boolean
638 elf_s390_object_p (abfd)
639 bfd *abfd;
640 {
641 /* Set the right machine number for an s390 elf32 file. */
642 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
643 }
644
645 /* s390 ELF linker hash table. */
646
647 struct elf_s390_link_hash_table
648 {
649 struct elf_link_hash_table elf;
650
651 /* Short-cuts to get to dynamic linker sections. */
652 asection *sgot;
653 asection *sgotplt;
654 asection *srelgot;
655 asection *splt;
656 asection *srelplt;
657 asection *sdynbss;
658 asection *srelbss;
659
660 union {
661 bfd_signed_vma refcount;
662 bfd_vma offset;
663 } tls_ldm_got;
664
665 /* Small local sym to section mapping cache. */
666 struct sym_sec_cache sym_sec;
667 };
668
669 /* Get the s390 ELF linker hash table from a link_info structure. */
670
671 #define elf_s390_hash_table(p) \
672 ((struct elf_s390_link_hash_table *) ((p)->hash))
673
674 /* Create an entry in an s390 ELF linker hash table. */
675
676 static struct bfd_hash_entry *
677 link_hash_newfunc (entry, table, string)
678 struct bfd_hash_entry *entry;
679 struct bfd_hash_table *table;
680 const char *string;
681 {
682 /* Allocate the structure if it has not already been allocated by a
683 subclass. */
684 if (entry == NULL)
685 {
686 entry = bfd_hash_allocate (table,
687 sizeof (struct elf_s390_link_hash_entry));
688 if (entry == NULL)
689 return entry;
690 }
691
692 /* Call the allocation method of the superclass. */
693 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
694 if (entry != NULL)
695 {
696 struct elf_s390_link_hash_entry *eh;
697
698 eh = (struct elf_s390_link_hash_entry *) entry;
699 eh->dyn_relocs = NULL;
700 eh->gotplt_refcount = 0;
701 eh->tls_type = GOT_UNKNOWN;
702 }
703
704 return entry;
705 }
706
707 /* Create an s390 ELF linker hash table. */
708
709 static struct bfd_link_hash_table *
710 elf_s390_link_hash_table_create (abfd)
711 bfd *abfd;
712 {
713 struct elf_s390_link_hash_table *ret;
714 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
715
716 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
717 if (ret == NULL)
718 return NULL;
719
720 if (! _bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc))
721 {
722 free (ret);
723 return NULL;
724 }
725
726 ret->sgot = NULL;
727 ret->sgotplt = NULL;
728 ret->srelgot = NULL;
729 ret->splt = NULL;
730 ret->srelplt = NULL;
731 ret->sdynbss = NULL;
732 ret->srelbss = NULL;
733 ret->tls_ldm_got.refcount = 0;
734 ret->sym_sec.abfd = NULL;
735
736 return &ret->elf.root;
737 }
738
739 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
740 shortcuts to them in our hash table. */
741
742 static bfd_boolean
743 create_got_section (dynobj, info)
744 bfd *dynobj;
745 struct bfd_link_info *info;
746 {
747 struct elf_s390_link_hash_table *htab;
748
749 if (! _bfd_elf_create_got_section (dynobj, info))
750 return FALSE;
751
752 htab = elf_s390_hash_table (info);
753 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
754 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
755 if (!htab->sgot || !htab->sgotplt)
756 abort ();
757
758 htab->srelgot = bfd_make_section (dynobj, ".rela.got");
759 if (htab->srelgot == NULL
760 || ! bfd_set_section_flags (dynobj, htab->srelgot,
761 (SEC_ALLOC | SEC_LOAD | SEC_HAS_CONTENTS
762 | SEC_IN_MEMORY | SEC_LINKER_CREATED
763 | SEC_READONLY))
764 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
765 return FALSE;
766 return TRUE;
767 }
768
769 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
770 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
771 hash table. */
772
773 static bfd_boolean
774 elf_s390_create_dynamic_sections (dynobj, info)
775 bfd *dynobj;
776 struct bfd_link_info *info;
777 {
778 struct elf_s390_link_hash_table *htab;
779
780 htab = elf_s390_hash_table (info);
781 if (!htab->sgot && !create_got_section (dynobj, info))
782 return FALSE;
783
784 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
785 return FALSE;
786
787 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
788 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
789 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
790 if (!info->shared)
791 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
792
793 if (!htab->splt || !htab->srelplt || !htab->sdynbss
794 || (!info->shared && !htab->srelbss))
795 abort ();
796
797 return TRUE;
798 }
799
800 /* Copy the extra info we tack onto an elf_link_hash_entry. */
801
802 static void
803 elf_s390_copy_indirect_symbol (bed, dir, ind)
804 const struct elf_backend_data *bed;
805 struct elf_link_hash_entry *dir, *ind;
806 {
807 struct elf_s390_link_hash_entry *edir, *eind;
808
809 edir = (struct elf_s390_link_hash_entry *) dir;
810 eind = (struct elf_s390_link_hash_entry *) ind;
811
812 if (eind->dyn_relocs != NULL)
813 {
814 if (edir->dyn_relocs != NULL)
815 {
816 struct elf_s390_dyn_relocs **pp;
817 struct elf_s390_dyn_relocs *p;
818
819 if (ind->root.type == bfd_link_hash_indirect)
820 abort ();
821
822 /* Add reloc counts against the weak sym to the strong sym
823 list. Merge any entries against the same section. */
824 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
825 {
826 struct elf_s390_dyn_relocs *q;
827
828 for (q = edir->dyn_relocs; q != NULL; q = q->next)
829 if (q->sec == p->sec)
830 {
831 q->pc_count += p->pc_count;
832 q->count += p->count;
833 *pp = p->next;
834 break;
835 }
836 if (q == NULL)
837 pp = &p->next;
838 }
839 *pp = edir->dyn_relocs;
840 }
841
842 edir->dyn_relocs = eind->dyn_relocs;
843 eind->dyn_relocs = NULL;
844 }
845
846 if (ind->root.type == bfd_link_hash_indirect
847 && dir->got.refcount <= 0)
848 {
849 edir->tls_type = eind->tls_type;
850 eind->tls_type = GOT_UNKNOWN;
851 }
852
853 if (ELIMINATE_COPY_RELOCS
854 && ind->root.type != bfd_link_hash_indirect
855 && dir->dynamic_adjusted)
856 {
857 /* If called to transfer flags for a weakdef during processing
858 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
859 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
860 dir->ref_dynamic |= ind->ref_dynamic;
861 dir->ref_regular |= ind->ref_regular;
862 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
863 dir->needs_plt |= ind->needs_plt;
864 }
865 else
866 _bfd_elf_link_hash_copy_indirect (bed, dir, ind);
867 }
868
869 static int
870 elf_s390_tls_transition (info, r_type, is_local)
871 struct bfd_link_info *info;
872 int r_type;
873 int is_local;
874 {
875 if (info->shared)
876 return r_type;
877
878 switch (r_type)
879 {
880 case R_390_TLS_GD64:
881 case R_390_TLS_IE64:
882 if (is_local)
883 return R_390_TLS_LE64;
884 return R_390_TLS_IE64;
885 case R_390_TLS_GOTIE64:
886 if (is_local)
887 return R_390_TLS_LE64;
888 return R_390_TLS_GOTIE64;
889 case R_390_TLS_LDM64:
890 return R_390_TLS_LE64;
891 }
892
893 return r_type;
894 }
895
896 /* Look through the relocs for a section during the first phase, and
897 allocate space in the global offset table or procedure linkage
898 table. */
899
900 static bfd_boolean
901 elf_s390_check_relocs (abfd, info, sec, relocs)
902 bfd *abfd;
903 struct bfd_link_info *info;
904 asection *sec;
905 const Elf_Internal_Rela *relocs;
906 {
907 struct elf_s390_link_hash_table *htab;
908 Elf_Internal_Shdr *symtab_hdr;
909 struct elf_link_hash_entry **sym_hashes;
910 const Elf_Internal_Rela *rel;
911 const Elf_Internal_Rela *rel_end;
912 asection *sreloc;
913 bfd_signed_vma *local_got_refcounts;
914 int tls_type, old_tls_type;
915
916 if (info->relocatable)
917 return TRUE;
918
919 htab = elf_s390_hash_table (info);
920 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
921 sym_hashes = elf_sym_hashes (abfd);
922 local_got_refcounts = elf_local_got_refcounts (abfd);
923
924 sreloc = NULL;
925
926 rel_end = relocs + sec->reloc_count;
927 for (rel = relocs; rel < rel_end; rel++)
928 {
929 unsigned int r_type;
930 unsigned long r_symndx;
931 struct elf_link_hash_entry *h;
932
933 r_symndx = ELF64_R_SYM (rel->r_info);
934
935 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
936 {
937 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
938 abfd,
939 r_symndx);
940 return FALSE;
941 }
942
943 if (r_symndx < symtab_hdr->sh_info)
944 h = NULL;
945 else
946 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
947
948 /* Create got section and local_got_refcounts array if they
949 are needed. */
950 r_type = elf_s390_tls_transition (info,
951 ELF64_R_TYPE (rel->r_info),
952 h == NULL);
953 switch (r_type)
954 {
955 case R_390_GOT12:
956 case R_390_GOT16:
957 case R_390_GOT20:
958 case R_390_GOT32:
959 case R_390_GOT64:
960 case R_390_GOTENT:
961 case R_390_GOTPLT12:
962 case R_390_GOTPLT16:
963 case R_390_GOTPLT20:
964 case R_390_GOTPLT32:
965 case R_390_GOTPLT64:
966 case R_390_GOTPLTENT:
967 case R_390_TLS_GD64:
968 case R_390_TLS_GOTIE12:
969 case R_390_TLS_GOTIE20:
970 case R_390_TLS_GOTIE64:
971 case R_390_TLS_IEENT:
972 case R_390_TLS_IE64:
973 case R_390_TLS_LDM64:
974 if (h == NULL
975 && local_got_refcounts == NULL)
976 {
977 bfd_size_type size;
978
979 size = symtab_hdr->sh_info;
980 size *= (sizeof (bfd_signed_vma) + sizeof(char));
981 local_got_refcounts = ((bfd_signed_vma *)
982 bfd_zalloc (abfd, size));
983 if (local_got_refcounts == NULL)
984 return FALSE;
985 elf_local_got_refcounts (abfd) = local_got_refcounts;
986 elf_s390_local_got_tls_type (abfd)
987 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
988 }
989 /* Fall through. */
990 case R_390_GOTOFF16:
991 case R_390_GOTOFF32:
992 case R_390_GOTOFF64:
993 case R_390_GOTPC:
994 case R_390_GOTPCDBL:
995 if (htab->sgot == NULL)
996 {
997 if (htab->elf.dynobj == NULL)
998 htab->elf.dynobj = abfd;
999 if (!create_got_section (htab->elf.dynobj, info))
1000 return FALSE;
1001 }
1002 }
1003
1004 switch (r_type)
1005 {
1006 case R_390_GOTOFF16:
1007 case R_390_GOTOFF32:
1008 case R_390_GOTOFF64:
1009 case R_390_GOTPC:
1010 case R_390_GOTPCDBL:
1011 /* Got is created, nothing to be done. */
1012 break;
1013
1014 case R_390_PLT16DBL:
1015 case R_390_PLT32:
1016 case R_390_PLT32DBL:
1017 case R_390_PLT64:
1018 case R_390_PLTOFF16:
1019 case R_390_PLTOFF32:
1020 case R_390_PLTOFF64:
1021 /* This symbol requires a procedure linkage table entry. We
1022 actually build the entry in adjust_dynamic_symbol,
1023 because this might be a case of linking PIC code which is
1024 never referenced by a dynamic object, in which case we
1025 don't need to generate a procedure linkage table entry
1026 after all. */
1027
1028 /* If this is a local symbol, we resolve it directly without
1029 creating a procedure linkage table entry. */
1030 if (h != NULL)
1031 {
1032 h->needs_plt = 1;
1033 h->plt.refcount += 1;
1034 }
1035 break;
1036
1037 case R_390_GOTPLT12:
1038 case R_390_GOTPLT16:
1039 case R_390_GOTPLT20:
1040 case R_390_GOTPLT32:
1041 case R_390_GOTPLT64:
1042 case R_390_GOTPLTENT:
1043 /* This symbol requires either a procedure linkage table entry
1044 or an entry in the local got. We actually build the entry
1045 in adjust_dynamic_symbol because whether this is really a
1046 global reference can change and with it the fact if we have
1047 to create a plt entry or a local got entry. To be able to
1048 make a once global symbol a local one we have to keep track
1049 of the number of gotplt references that exist for this
1050 symbol. */
1051 if (h != NULL)
1052 {
1053 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1054 h->needs_plt = 1;
1055 h->plt.refcount += 1;
1056 }
1057 else
1058 local_got_refcounts[r_symndx] += 1;
1059 break;
1060
1061 case R_390_TLS_LDM64:
1062 htab->tls_ldm_got.refcount += 1;
1063 break;
1064
1065 case R_390_TLS_IE64:
1066 case R_390_TLS_GOTIE12:
1067 case R_390_TLS_GOTIE20:
1068 case R_390_TLS_GOTIE64:
1069 case R_390_TLS_IEENT:
1070 if (info->shared)
1071 info->flags |= DF_STATIC_TLS;
1072 /* Fall through */
1073
1074 case R_390_GOT12:
1075 case R_390_GOT16:
1076 case R_390_GOT20:
1077 case R_390_GOT32:
1078 case R_390_GOT64:
1079 case R_390_GOTENT:
1080 case R_390_TLS_GD64:
1081 /* This symbol requires a global offset table entry. */
1082 switch (r_type)
1083 {
1084 default:
1085 case R_390_GOT12:
1086 case R_390_GOT16:
1087 case R_390_GOT20:
1088 case R_390_GOT32:
1089 case R_390_GOTENT:
1090 tls_type = GOT_NORMAL;
1091 break;
1092 case R_390_TLS_GD64:
1093 tls_type = GOT_TLS_GD;
1094 break;
1095 case R_390_TLS_IE64:
1096 case R_390_TLS_GOTIE64:
1097 tls_type = GOT_TLS_IE;
1098 break;
1099 case R_390_TLS_GOTIE12:
1100 case R_390_TLS_GOTIE20:
1101 case R_390_TLS_IEENT:
1102 tls_type = GOT_TLS_IE_NLT;
1103 break;
1104 }
1105
1106 if (h != NULL)
1107 {
1108 h->got.refcount += 1;
1109 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1110 }
1111 else
1112 {
1113 local_got_refcounts[r_symndx] += 1;
1114 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1115 }
1116 /* If a TLS symbol is accessed using IE at least once,
1117 there is no point to use dynamic model for it. */
1118 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1119 {
1120 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1121 {
1122 (*_bfd_error_handler)
1123 (_("%B: `%s' accessed both as normal and thread local symbol"),
1124 abfd, h->root.root.string);
1125 return FALSE;
1126 }
1127 if (old_tls_type > tls_type)
1128 tls_type = old_tls_type;
1129 }
1130
1131 if (old_tls_type != tls_type)
1132 {
1133 if (h != NULL)
1134 elf_s390_hash_entry (h)->tls_type = tls_type;
1135 else
1136 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1137 }
1138
1139 if (r_type != R_390_TLS_IE64)
1140 break;
1141 /* Fall through */
1142
1143 case R_390_TLS_LE64:
1144 if (!info->shared)
1145 break;
1146 info->flags |= DF_STATIC_TLS;
1147 /* Fall through */
1148
1149 case R_390_8:
1150 case R_390_16:
1151 case R_390_32:
1152 case R_390_64:
1153 case R_390_PC16:
1154 case R_390_PC16DBL:
1155 case R_390_PC32:
1156 case R_390_PC32DBL:
1157 case R_390_PC64:
1158 if (h != NULL && !info->shared)
1159 {
1160 /* If this reloc is in a read-only section, we might
1161 need a copy reloc. We can't check reliably at this
1162 stage whether the section is read-only, as input
1163 sections have not yet been mapped to output sections.
1164 Tentatively set the flag for now, and correct in
1165 adjust_dynamic_symbol. */
1166 h->non_got_ref = 1;
1167
1168 /* We may need a .plt entry if the function this reloc
1169 refers to is in a shared lib. */
1170 h->plt.refcount += 1;
1171 }
1172
1173 /* If we are creating a shared library, and this is a reloc
1174 against a global symbol, or a non PC relative reloc
1175 against a local symbol, then we need to copy the reloc
1176 into the shared library. However, if we are linking with
1177 -Bsymbolic, we do not need to copy a reloc against a
1178 global symbol which is defined in an object we are
1179 including in the link (i.e., DEF_REGULAR is set). At
1180 this point we have not seen all the input files, so it is
1181 possible that DEF_REGULAR is not set now but will be set
1182 later (it is never cleared). In case of a weak definition,
1183 DEF_REGULAR may be cleared later by a strong definition in
1184 a shared library. We account for that possibility below by
1185 storing information in the relocs_copied field of the hash
1186 table entry. A similar situation occurs when creating
1187 shared libraries and symbol visibility changes render the
1188 symbol local.
1189
1190 If on the other hand, we are creating an executable, we
1191 may need to keep relocations for symbols satisfied by a
1192 dynamic library if we manage to avoid copy relocs for the
1193 symbol. */
1194 if ((info->shared
1195 && (sec->flags & SEC_ALLOC) != 0
1196 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1197 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1198 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1199 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1200 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1201 || (h != NULL
1202 && (! info->symbolic
1203 || h->root.type == bfd_link_hash_defweak
1204 || !h->def_regular))))
1205 || (ELIMINATE_COPY_RELOCS
1206 && !info->shared
1207 && (sec->flags & SEC_ALLOC) != 0
1208 && h != NULL
1209 && (h->root.type == bfd_link_hash_defweak
1210 || !h->def_regular)))
1211 {
1212 struct elf_s390_dyn_relocs *p;
1213 struct elf_s390_dyn_relocs **head;
1214
1215 /* We must copy these reloc types into the output file.
1216 Create a reloc section in dynobj and make room for
1217 this reloc. */
1218 if (sreloc == NULL)
1219 {
1220 const char *name;
1221 bfd *dynobj;
1222
1223 name = (bfd_elf_string_from_elf_section
1224 (abfd,
1225 elf_elfheader (abfd)->e_shstrndx,
1226 elf_section_data (sec)->rel_hdr.sh_name));
1227 if (name == NULL)
1228 return FALSE;
1229
1230 if (strncmp (name, ".rela", 5) != 0
1231 || strcmp (bfd_get_section_name (abfd, sec),
1232 name + 5) != 0)
1233 {
1234 (*_bfd_error_handler)
1235 (_("%B: bad relocation section name `%s\'"),
1236 abfd, name);
1237 }
1238
1239 if (htab->elf.dynobj == NULL)
1240 htab->elf.dynobj = abfd;
1241
1242 dynobj = htab->elf.dynobj;
1243 sreloc = bfd_get_section_by_name (dynobj, name);
1244 if (sreloc == NULL)
1245 {
1246 flagword flags;
1247
1248 sreloc = bfd_make_section (dynobj, name);
1249 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1250 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1251 if ((sec->flags & SEC_ALLOC) != 0)
1252 flags |= SEC_ALLOC | SEC_LOAD;
1253 if (sreloc == NULL
1254 || ! bfd_set_section_flags (dynobj, sreloc, flags)
1255 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1256 return FALSE;
1257 }
1258 elf_section_data (sec)->sreloc = sreloc;
1259 }
1260
1261 /* If this is a global symbol, we count the number of
1262 relocations we need for this symbol. */
1263 if (h != NULL)
1264 {
1265 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1266 }
1267 else
1268 {
1269 /* Track dynamic relocs needed for local syms too.
1270 We really need local syms available to do this
1271 easily. Oh well. */
1272
1273 asection *s;
1274 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1275 sec, r_symndx);
1276 if (s == NULL)
1277 return FALSE;
1278
1279 head = ((struct elf_s390_dyn_relocs **)
1280 &elf_section_data (s)->local_dynrel);
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 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1319 return FALSE;
1320 break;
1321
1322 default:
1323 break;
1324 }
1325 }
1326
1327 return TRUE;
1328 }
1329
1330 /* Return the section that should be marked against GC for a given
1331 relocation. */
1332
1333 static asection *
1334 elf_s390_gc_mark_hook (sec, info, rel, h, sym)
1335 asection *sec;
1336 struct bfd_link_info *info ATTRIBUTE_UNUSED;
1337 Elf_Internal_Rela *rel;
1338 struct elf_link_hash_entry *h;
1339 Elf_Internal_Sym *sym;
1340 {
1341 if (h != NULL)
1342 {
1343 switch (ELF64_R_TYPE (rel->r_info))
1344 {
1345 case R_390_GNU_VTINHERIT:
1346 case R_390_GNU_VTENTRY:
1347 break;
1348
1349 default:
1350 switch (h->root.type)
1351 {
1352 case bfd_link_hash_defined:
1353 case bfd_link_hash_defweak:
1354 return h->root.u.def.section;
1355
1356 case bfd_link_hash_common:
1357 return h->root.u.c.p->section;
1358
1359 default:
1360 break;
1361 }
1362 }
1363 }
1364 else
1365 return bfd_section_from_elf_index (sec->owner, sym->st_shndx);
1366
1367 return NULL;
1368 }
1369
1370 /* Update the got entry reference counts for the section being removed. */
1371
1372 static bfd_boolean
1373 elf_s390_gc_sweep_hook (abfd, info, sec, relocs)
1374 bfd *abfd;
1375 struct bfd_link_info *info;
1376 asection *sec;
1377 const Elf_Internal_Rela *relocs;
1378 {
1379 Elf_Internal_Shdr *symtab_hdr;
1380 struct elf_link_hash_entry **sym_hashes;
1381 bfd_signed_vma *local_got_refcounts;
1382 const Elf_Internal_Rela *rel, *relend;
1383
1384 elf_section_data (sec)->local_dynrel = NULL;
1385
1386 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1387 sym_hashes = elf_sym_hashes (abfd);
1388 local_got_refcounts = elf_local_got_refcounts (abfd);
1389
1390 relend = relocs + sec->reloc_count;
1391 for (rel = relocs; rel < relend; rel++)
1392 {
1393 unsigned long r_symndx;
1394 unsigned int r_type;
1395 struct elf_link_hash_entry *h = NULL;
1396
1397 r_symndx = ELF64_R_SYM (rel->r_info);
1398 if (r_symndx >= symtab_hdr->sh_info)
1399 {
1400 struct elf_s390_link_hash_entry *eh;
1401 struct elf_s390_dyn_relocs **pp;
1402 struct elf_s390_dyn_relocs *p;
1403
1404 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1405 eh = (struct elf_s390_link_hash_entry *) h;
1406
1407 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1408 if (p->sec == sec)
1409 {
1410 /* Everything must go for SEC. */
1411 *pp = p->next;
1412 break;
1413 }
1414 }
1415
1416 r_type = ELF64_R_TYPE (rel->r_info);
1417 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1418 switch (r_type)
1419 {
1420 case R_390_TLS_LDM64:
1421 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1422 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1423 break;
1424
1425 case R_390_TLS_GD64:
1426 case R_390_TLS_IE64:
1427 case R_390_TLS_GOTIE12:
1428 case R_390_TLS_GOTIE20:
1429 case R_390_TLS_GOTIE64:
1430 case R_390_TLS_IEENT:
1431 case R_390_GOT12:
1432 case R_390_GOT16:
1433 case R_390_GOT20:
1434 case R_390_GOT32:
1435 case R_390_GOT64:
1436 case R_390_GOTOFF16:
1437 case R_390_GOTOFF32:
1438 case R_390_GOTOFF64:
1439 case R_390_GOTPC:
1440 case R_390_GOTPCDBL:
1441 case R_390_GOTENT:
1442 if (h != NULL)
1443 {
1444 if (h->got.refcount > 0)
1445 h->got.refcount -= 1;
1446 }
1447 else if (local_got_refcounts != NULL)
1448 {
1449 if (local_got_refcounts[r_symndx] > 0)
1450 local_got_refcounts[r_symndx] -= 1;
1451 }
1452 break;
1453
1454 case R_390_8:
1455 case R_390_12:
1456 case R_390_16:
1457 case R_390_20:
1458 case R_390_32:
1459 case R_390_64:
1460 case R_390_PC16:
1461 case R_390_PC16DBL:
1462 case R_390_PC32:
1463 case R_390_PC32DBL:
1464 case R_390_PC64:
1465 if (info->shared)
1466 break;
1467 /* Fall through */
1468
1469 case R_390_PLT16DBL:
1470 case R_390_PLT32:
1471 case R_390_PLT32DBL:
1472 case R_390_PLT64:
1473 case R_390_PLTOFF16:
1474 case R_390_PLTOFF32:
1475 case R_390_PLTOFF64:
1476 if (h != NULL)
1477 {
1478 if (h->plt.refcount > 0)
1479 h->plt.refcount -= 1;
1480 }
1481 break;
1482
1483 case R_390_GOTPLT12:
1484 case R_390_GOTPLT16:
1485 case R_390_GOTPLT20:
1486 case R_390_GOTPLT32:
1487 case R_390_GOTPLT64:
1488 case R_390_GOTPLTENT:
1489 if (h != NULL)
1490 {
1491 if (h->plt.refcount > 0)
1492 {
1493 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1494 h->plt.refcount -= 1;
1495 }
1496 }
1497 else if (local_got_refcounts != NULL)
1498 {
1499 if (local_got_refcounts[r_symndx] > 0)
1500 local_got_refcounts[r_symndx] -= 1;
1501 }
1502 break;
1503
1504 default:
1505 break;
1506 }
1507 }
1508
1509 return TRUE;
1510 }
1511
1512 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1513 entry but we found we will not create any. Called when we find we will
1514 not have any PLT for this symbol, by for example
1515 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1516 or elf_s390_size_dynamic_sections if no dynamic sections will be
1517 created (we're only linking static objects). */
1518
1519 static void
1520 elf_s390_adjust_gotplt (h)
1521 struct elf_s390_link_hash_entry *h;
1522 {
1523 if (h->elf.root.type == bfd_link_hash_warning)
1524 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1525
1526 if (h->gotplt_refcount <= 0)
1527 return;
1528
1529 /* We simply add the number of gotplt references to the number
1530 * of got references for this symbol. */
1531 h->elf.got.refcount += h->gotplt_refcount;
1532 h->gotplt_refcount = -1;
1533 }
1534
1535 /* Adjust a symbol defined by a dynamic object and referenced by a
1536 regular object. The current definition is in some section of the
1537 dynamic object, but we're not including those sections. We have to
1538 change the definition to something the rest of the link can
1539 understand. */
1540
1541 static bfd_boolean
1542 elf_s390_adjust_dynamic_symbol (info, h)
1543 struct bfd_link_info *info;
1544 struct elf_link_hash_entry *h;
1545 {
1546 struct elf_s390_link_hash_table *htab;
1547 asection *s;
1548 unsigned int power_of_two;
1549
1550 /* If this is a function, put it in the procedure linkage table. We
1551 will fill in the contents of the procedure linkage table later
1552 (although we could actually do it here). */
1553 if (h->type == STT_FUNC
1554 || h->needs_plt)
1555 {
1556 if (h->plt.refcount <= 0
1557 || (! info->shared
1558 && !h->def_dynamic
1559 && !h->ref_dynamic
1560 && h->root.type != bfd_link_hash_undefweak
1561 && h->root.type != bfd_link_hash_undefined))
1562 {
1563 /* This case can occur if we saw a PLT32 reloc in an input
1564 file, but the symbol was never referred to by a dynamic
1565 object, or if all references were garbage collected. In
1566 such a case, we don't actually need to build a procedure
1567 linkage table, and we can just do a PC32 reloc instead. */
1568 h->plt.offset = (bfd_vma) -1;
1569 h->needs_plt = 0;
1570 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1571 }
1572
1573 return TRUE;
1574 }
1575 else
1576 /* It's possible that we incorrectly decided a .plt reloc was
1577 needed for an R_390_PC32 reloc to a non-function sym in
1578 check_relocs. We can't decide accurately between function and
1579 non-function syms in check-relocs; Objects loaded later in
1580 the link may change h->type. So fix it now. */
1581 h->plt.offset = (bfd_vma) -1;
1582
1583 /* If this is a weak symbol, and there is a real definition, the
1584 processor independent code will have arranged for us to see the
1585 real definition first, and we can just use the same value. */
1586 if (h->u.weakdef != NULL)
1587 {
1588 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1589 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1590 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1591 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1592 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1593 h->non_got_ref = h->u.weakdef->non_got_ref;
1594 return TRUE;
1595 }
1596
1597 /* This is a reference to a symbol defined by a dynamic object which
1598 is not a function. */
1599
1600 /* If we are creating a shared library, we must presume that the
1601 only references to the symbol are via the global offset table.
1602 For such cases we need not do anything here; the relocations will
1603 be handled correctly by relocate_section. */
1604 if (info->shared)
1605 return TRUE;
1606
1607 /* If there are no references to this symbol that do not use the
1608 GOT, we don't need to generate a copy reloc. */
1609 if (!h->non_got_ref)
1610 return TRUE;
1611
1612 /* If -z nocopyreloc was given, we won't generate them either. */
1613 if (info->nocopyreloc)
1614 {
1615 h->non_got_ref = 0;
1616 return TRUE;
1617 }
1618
1619 if (ELIMINATE_COPY_RELOCS)
1620 {
1621 struct elf_s390_link_hash_entry * eh;
1622 struct elf_s390_dyn_relocs *p;
1623
1624 eh = (struct elf_s390_link_hash_entry *) h;
1625 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1626 {
1627 s = p->sec->output_section;
1628 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1629 break;
1630 }
1631
1632 /* If we didn't find any dynamic relocs in read-only sections, then
1633 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1634 if (p == NULL)
1635 {
1636 h->non_got_ref = 0;
1637 return TRUE;
1638 }
1639 }
1640
1641 /* We must allocate the symbol in our .dynbss section, which will
1642 become part of the .bss section of the executable. There will be
1643 an entry for this symbol in the .dynsym section. The dynamic
1644 object will contain position independent code, so all references
1645 from the dynamic object to this symbol will go through the global
1646 offset table. The dynamic linker will use the .dynsym entry to
1647 determine the address it must put in the global offset table, so
1648 both the dynamic object and the regular object will refer to the
1649 same memory location for the variable. */
1650
1651 htab = elf_s390_hash_table (info);
1652
1653 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1654 copy the initial value out of the dynamic object and into the
1655 runtime process image. */
1656 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1657 {
1658 htab->srelbss->size += sizeof (Elf64_External_Rela);
1659 h->needs_copy = 1;
1660 }
1661
1662 /* We need to figure out the alignment required for this symbol. I
1663 have no idea how ELF linkers handle this. */
1664 power_of_two = bfd_log2 (h->size);
1665 if (power_of_two > 3)
1666 power_of_two = 3;
1667
1668 /* Apply the required alignment. */
1669 s = htab->sdynbss;
1670 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1671 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1672 {
1673 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1674 return FALSE;
1675 }
1676
1677 /* Define the symbol as being at this point in the section. */
1678 h->root.u.def.section = s;
1679 h->root.u.def.value = s->size;
1680
1681 /* Increment the section size to make room for the symbol. */
1682 s->size += h->size;
1683
1684 return TRUE;
1685 }
1686
1687 /* Allocate space in .plt, .got and associated reloc sections for
1688 dynamic relocs. */
1689
1690 static bfd_boolean
1691 allocate_dynrelocs (h, inf)
1692 struct elf_link_hash_entry *h;
1693 PTR inf;
1694 {
1695 struct bfd_link_info *info;
1696 struct elf_s390_link_hash_table *htab;
1697 struct elf_s390_link_hash_entry *eh;
1698 struct elf_s390_dyn_relocs *p;
1699
1700 if (h->root.type == bfd_link_hash_indirect)
1701 return TRUE;
1702
1703 if (h->root.type == bfd_link_hash_warning)
1704 /* When warning symbols are created, they **replace** the "real"
1705 entry in the hash table, thus we never get to see the real
1706 symbol in a hash traversal. So look at it now. */
1707 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1708
1709 info = (struct bfd_link_info *) inf;
1710 htab = elf_s390_hash_table (info);
1711
1712 if (htab->elf.dynamic_sections_created
1713 && h->plt.refcount > 0
1714 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1715 || h->root.type != bfd_link_hash_undefweak))
1716 {
1717 /* Make sure this symbol is output as a dynamic symbol.
1718 Undefined weak syms won't yet be marked as dynamic. */
1719 if (h->dynindx == -1
1720 && !h->forced_local)
1721 {
1722 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1723 return FALSE;
1724 }
1725
1726 if (info->shared
1727 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1728 {
1729 asection *s = htab->splt;
1730
1731 /* If this is the first .plt entry, make room for the special
1732 first entry. */
1733 if (s->size == 0)
1734 s->size += PLT_FIRST_ENTRY_SIZE;
1735
1736 h->plt.offset = s->size;
1737
1738 /* If this symbol is not defined in a regular file, and we are
1739 not generating a shared library, then set the symbol to this
1740 location in the .plt. This is required to make function
1741 pointers compare as equal between the normal executable and
1742 the shared library. */
1743 if (! info->shared
1744 && !h->def_regular)
1745 {
1746 h->root.u.def.section = s;
1747 h->root.u.def.value = h->plt.offset;
1748 }
1749
1750 /* Make room for this entry. */
1751 s->size += PLT_ENTRY_SIZE;
1752
1753 /* We also need to make an entry in the .got.plt section, which
1754 will be placed in the .got section by the linker script. */
1755 htab->sgotplt->size += GOT_ENTRY_SIZE;
1756
1757 /* We also need to make an entry in the .rela.plt section. */
1758 htab->srelplt->size += sizeof (Elf64_External_Rela);
1759 }
1760 else
1761 {
1762 h->plt.offset = (bfd_vma) -1;
1763 h->needs_plt = 0;
1764 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1765 }
1766 }
1767 else
1768 {
1769 h->plt.offset = (bfd_vma) -1;
1770 h->needs_plt = 0;
1771 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1772 }
1773
1774 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1775 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1776 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1777 we can save the dynamic TLS relocation. */
1778 if (h->got.refcount > 0
1779 && !info->shared
1780 && h->dynindx == -1
1781 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1782 {
1783 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1784 /* For the GOTIE access without a literal pool entry the offset has
1785 to be stored somewhere. The immediate value in the instruction
1786 is not bit enough so the value is stored in the got. */
1787 {
1788 h->got.offset = htab->sgot->size;
1789 htab->sgot->size += GOT_ENTRY_SIZE;
1790 }
1791 else
1792 h->got.offset = (bfd_vma) -1;
1793 }
1794 else if (h->got.refcount > 0)
1795 {
1796 asection *s;
1797 bfd_boolean dyn;
1798 int tls_type = elf_s390_hash_entry(h)->tls_type;
1799
1800 /* Make sure this symbol is output as a dynamic symbol.
1801 Undefined weak syms won't yet be marked as dynamic. */
1802 if (h->dynindx == -1
1803 && !h->forced_local)
1804 {
1805 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1806 return FALSE;
1807 }
1808
1809 s = htab->sgot;
1810 h->got.offset = s->size;
1811 s->size += GOT_ENTRY_SIZE;
1812 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1813 if (tls_type == GOT_TLS_GD)
1814 s->size += GOT_ENTRY_SIZE;
1815 dyn = htab->elf.dynamic_sections_created;
1816 /* R_390_TLS_IE64 needs one dynamic relocation,
1817 R_390_TLS_GD64 needs one if local symbol and two if global. */
1818 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1819 || tls_type >= GOT_TLS_IE)
1820 htab->srelgot->size += sizeof (Elf64_External_Rela);
1821 else if (tls_type == GOT_TLS_GD)
1822 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1823 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1824 || h->root.type != bfd_link_hash_undefweak)
1825 && (info->shared
1826 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1827 htab->srelgot->size += sizeof (Elf64_External_Rela);
1828 }
1829 else
1830 h->got.offset = (bfd_vma) -1;
1831
1832 eh = (struct elf_s390_link_hash_entry *) h;
1833 if (eh->dyn_relocs == NULL)
1834 return TRUE;
1835
1836 /* In the shared -Bsymbolic case, discard space allocated for
1837 dynamic pc-relative relocs against symbols which turn out to be
1838 defined in regular objects. For the normal shared case, discard
1839 space for pc-relative relocs that have become local due to symbol
1840 visibility changes. */
1841
1842 if (info->shared)
1843 {
1844 if (SYMBOL_REFERENCES_LOCAL (info, h))
1845 {
1846 struct elf_s390_dyn_relocs **pp;
1847
1848 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1849 {
1850 p->count -= p->pc_count;
1851 p->pc_count = 0;
1852 if (p->count == 0)
1853 *pp = p->next;
1854 else
1855 pp = &p->next;
1856 }
1857 }
1858
1859 /* Also discard relocs on undefined weak syms with non-default
1860 visibility. */
1861 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1862 && h->root.type == bfd_link_hash_undefweak)
1863 eh->dyn_relocs = NULL;
1864 }
1865 else if (ELIMINATE_COPY_RELOCS)
1866 {
1867 /* For the non-shared case, discard space for relocs against
1868 symbols which turn out to need copy relocs or are not
1869 dynamic. */
1870
1871 if (!h->non_got_ref
1872 && ((h->def_dynamic
1873 && !h->def_regular)
1874 || (htab->elf.dynamic_sections_created
1875 && (h->root.type == bfd_link_hash_undefweak
1876 || h->root.type == bfd_link_hash_undefined))))
1877 {
1878 /* Make sure this symbol is output as a dynamic symbol.
1879 Undefined weak syms won't yet be marked as dynamic. */
1880 if (h->dynindx == -1
1881 && !h->forced_local)
1882 {
1883 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1884 return FALSE;
1885 }
1886
1887 /* If that succeeded, we know we'll be keeping all the
1888 relocs. */
1889 if (h->dynindx != -1)
1890 goto keep;
1891 }
1892
1893 eh->dyn_relocs = NULL;
1894
1895 keep: ;
1896 }
1897
1898 /* Finally, allocate space. */
1899 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1900 {
1901 asection *sreloc = elf_section_data (p->sec)->sreloc;
1902 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1903 }
1904
1905 return TRUE;
1906 }
1907
1908 /* Find any dynamic relocs that apply to read-only sections. */
1909
1910 static bfd_boolean
1911 readonly_dynrelocs (h, inf)
1912 struct elf_link_hash_entry *h;
1913 PTR inf;
1914 {
1915 struct elf_s390_link_hash_entry *eh;
1916 struct elf_s390_dyn_relocs *p;
1917
1918 if (h->root.type == bfd_link_hash_warning)
1919 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1920
1921 eh = (struct elf_s390_link_hash_entry *) h;
1922 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1923 {
1924 asection *s = p->sec->output_section;
1925
1926 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1927 {
1928 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1929
1930 info->flags |= DF_TEXTREL;
1931
1932 /* Not an error, just cut short the traversal. */
1933 return FALSE;
1934 }
1935 }
1936 return TRUE;
1937 }
1938
1939 /* Set the sizes of the dynamic sections. */
1940
1941 static bfd_boolean
1942 elf_s390_size_dynamic_sections (output_bfd, info)
1943 bfd *output_bfd ATTRIBUTE_UNUSED;
1944 struct bfd_link_info *info;
1945 {
1946 struct elf_s390_link_hash_table *htab;
1947 bfd *dynobj;
1948 asection *s;
1949 bfd_boolean relocs;
1950 bfd *ibfd;
1951
1952 htab = elf_s390_hash_table (info);
1953 dynobj = htab->elf.dynobj;
1954 if (dynobj == NULL)
1955 abort ();
1956
1957 if (htab->elf.dynamic_sections_created)
1958 {
1959 /* Set the contents of the .interp section to the interpreter. */
1960 if (info->executable)
1961 {
1962 s = bfd_get_section_by_name (dynobj, ".interp");
1963 if (s == NULL)
1964 abort ();
1965 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1966 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1967 }
1968 }
1969
1970 /* Set up .got offsets for local syms, and space for local dynamic
1971 relocs. */
1972 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1973 {
1974 bfd_signed_vma *local_got;
1975 bfd_signed_vma *end_local_got;
1976 char *local_tls_type;
1977 bfd_size_type locsymcount;
1978 Elf_Internal_Shdr *symtab_hdr;
1979 asection *srela;
1980
1981 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
1982 continue;
1983
1984 for (s = ibfd->sections; s != NULL; s = s->next)
1985 {
1986 struct elf_s390_dyn_relocs *p;
1987
1988 for (p = *((struct elf_s390_dyn_relocs **)
1989 &elf_section_data (s)->local_dynrel);
1990 p != NULL;
1991 p = p->next)
1992 {
1993 if (!bfd_is_abs_section (p->sec)
1994 && bfd_is_abs_section (p->sec->output_section))
1995 {
1996 /* Input section has been discarded, either because
1997 it is a copy of a linkonce section or due to
1998 linker script /DISCARD/, so we'll be discarding
1999 the relocs too. */
2000 }
2001 else if (p->count != 0)
2002 {
2003 srela = elf_section_data (p->sec)->sreloc;
2004 srela->size += p->count * sizeof (Elf64_External_Rela);
2005 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2006 info->flags |= DF_TEXTREL;
2007 }
2008 }
2009 }
2010
2011 local_got = elf_local_got_refcounts (ibfd);
2012 if (!local_got)
2013 continue;
2014
2015 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2016 locsymcount = symtab_hdr->sh_info;
2017 end_local_got = local_got + locsymcount;
2018 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2019 s = htab->sgot;
2020 srela = htab->srelgot;
2021 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2022 {
2023 if (*local_got > 0)
2024 {
2025 *local_got = s->size;
2026 s->size += GOT_ENTRY_SIZE;
2027 if (*local_tls_type == GOT_TLS_GD)
2028 s->size += GOT_ENTRY_SIZE;
2029 if (info->shared)
2030 srela->size += sizeof (Elf64_External_Rela);
2031 }
2032 else
2033 *local_got = (bfd_vma) -1;
2034 }
2035 }
2036
2037 if (htab->tls_ldm_got.refcount > 0)
2038 {
2039 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2040 relocs. */
2041 htab->tls_ldm_got.offset = htab->sgot->size;
2042 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2043 htab->srelgot->size += sizeof (Elf64_External_Rela);
2044 }
2045 else
2046 htab->tls_ldm_got.offset = -1;
2047
2048 /* Allocate global sym .plt and .got entries, and space for global
2049 sym dynamic relocs. */
2050 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2051
2052 /* We now have determined the sizes of the various dynamic sections.
2053 Allocate memory for them. */
2054 relocs = FALSE;
2055 for (s = dynobj->sections; s != NULL; s = s->next)
2056 {
2057 if ((s->flags & SEC_LINKER_CREATED) == 0)
2058 continue;
2059
2060 if (s == htab->splt
2061 || s == htab->sgot
2062 || s == htab->sgotplt)
2063 {
2064 /* Strip this section if we don't need it; see the
2065 comment below. */
2066 }
2067 else if (strncmp (bfd_get_section_name (dynobj, s), ".rela", 5) == 0)
2068 {
2069 if (s->size != 0 && s != htab->srelplt)
2070 relocs = TRUE;
2071
2072 /* We use the reloc_count field as a counter if we need
2073 to copy relocs into the output file. */
2074 s->reloc_count = 0;
2075 }
2076 else
2077 {
2078 /* It's not one of our sections, so don't allocate space. */
2079 continue;
2080 }
2081
2082 if (s->size == 0)
2083 {
2084 /* If we don't need this section, strip it from the
2085 output file. This is to handle .rela.bss and
2086 .rela.plt. We must create it in
2087 create_dynamic_sections, because it must be created
2088 before the linker maps input sections to output
2089 sections. The linker does that before
2090 adjust_dynamic_symbol is called, and it is that
2091 function which decides whether anything needs to go
2092 into these sections. */
2093
2094 _bfd_strip_section_from_output (info, s);
2095 continue;
2096 }
2097
2098 /* Allocate memory for the section contents. We use bfd_zalloc
2099 here in case unused entries are not reclaimed before the
2100 section's contents are written out. This should not happen,
2101 but this way if it does, we get a R_390_NONE reloc instead
2102 of garbage. */
2103 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2104 if (s->contents == NULL)
2105 return FALSE;
2106 }
2107
2108 if (htab->elf.dynamic_sections_created)
2109 {
2110 /* Add some entries to the .dynamic section. We fill in the
2111 values later, in elf_s390_finish_dynamic_sections, but we
2112 must add the entries now so that we get the correct size for
2113 the .dynamic section. The DT_DEBUG entry is filled in by the
2114 dynamic linker and used by the debugger. */
2115 #define add_dynamic_entry(TAG, VAL) \
2116 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2117
2118 if (info->executable)
2119 {
2120 if (!add_dynamic_entry (DT_DEBUG, 0))
2121 return FALSE;
2122 }
2123
2124 if (htab->splt->size != 0)
2125 {
2126 if (!add_dynamic_entry (DT_PLTGOT, 0)
2127 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2128 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2129 || !add_dynamic_entry (DT_JMPREL, 0))
2130 return FALSE;
2131 }
2132
2133 if (relocs)
2134 {
2135 if (!add_dynamic_entry (DT_RELA, 0)
2136 || !add_dynamic_entry (DT_RELASZ, 0)
2137 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2138 return FALSE;
2139
2140 /* If any dynamic relocs apply to a read-only section,
2141 then we need a DT_TEXTREL entry. */
2142 if ((info->flags & DF_TEXTREL) == 0)
2143 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2144 (PTR) info);
2145
2146 if ((info->flags & DF_TEXTREL) != 0)
2147 {
2148 if (!add_dynamic_entry (DT_TEXTREL, 0))
2149 return FALSE;
2150 }
2151 }
2152 }
2153 #undef add_dynamic_entry
2154
2155 return TRUE;
2156 }
2157
2158 /* Return the base VMA address which should be subtracted from real addresses
2159 when resolving @dtpoff relocation.
2160 This is PT_TLS segment p_vaddr. */
2161
2162 static bfd_vma
2163 dtpoff_base (info)
2164 struct bfd_link_info *info;
2165 {
2166 /* If tls_sec is NULL, we should have signalled an error already. */
2167 if (elf_hash_table (info)->tls_sec == NULL)
2168 return 0;
2169 return elf_hash_table (info)->tls_sec->vma;
2170 }
2171
2172 /* Return the relocation value for @tpoff relocation
2173 if STT_TLS virtual address is ADDRESS. */
2174
2175 static bfd_vma
2176 tpoff (info, address)
2177 struct bfd_link_info *info;
2178 bfd_vma address;
2179 {
2180 struct elf_link_hash_table *htab = elf_hash_table (info);
2181
2182 /* If tls_sec is NULL, we should have signalled an error already. */
2183 if (htab->tls_sec == NULL)
2184 return 0;
2185 return htab->tls_size + htab->tls_sec->vma - address;
2186 }
2187
2188 /* Complain if TLS instruction relocation is against an invalid
2189 instruction. */
2190
2191 static void
2192 invalid_tls_insn (input_bfd, input_section, rel)
2193 bfd *input_bfd;
2194 asection *input_section;
2195 Elf_Internal_Rela *rel;
2196 {
2197 reloc_howto_type *howto;
2198
2199 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2200 (*_bfd_error_handler)
2201 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2202 input_bfd,
2203 input_section,
2204 (long) rel->r_offset,
2205 howto->name);
2206 }
2207
2208 /* Relocate a 390 ELF section. */
2209
2210 static bfd_boolean
2211 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2212 contents, relocs, local_syms, local_sections)
2213 bfd *output_bfd;
2214 struct bfd_link_info *info;
2215 bfd *input_bfd;
2216 asection *input_section;
2217 bfd_byte *contents;
2218 Elf_Internal_Rela *relocs;
2219 Elf_Internal_Sym *local_syms;
2220 asection **local_sections;
2221 {
2222 struct elf_s390_link_hash_table *htab;
2223 Elf_Internal_Shdr *symtab_hdr;
2224 struct elf_link_hash_entry **sym_hashes;
2225 bfd_vma *local_got_offsets;
2226 Elf_Internal_Rela *rel;
2227 Elf_Internal_Rela *relend;
2228
2229 if (info->relocatable)
2230 return TRUE;
2231
2232 htab = elf_s390_hash_table (info);
2233 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2234 sym_hashes = elf_sym_hashes (input_bfd);
2235 local_got_offsets = elf_local_got_offsets (input_bfd);
2236
2237 rel = relocs;
2238 relend = relocs + input_section->reloc_count;
2239 for (; rel < relend; rel++)
2240 {
2241 unsigned int r_type;
2242 reloc_howto_type *howto;
2243 unsigned long r_symndx;
2244 struct elf_link_hash_entry *h;
2245 Elf_Internal_Sym *sym;
2246 asection *sec;
2247 bfd_vma off;
2248 bfd_vma relocation;
2249 bfd_boolean unresolved_reloc;
2250 bfd_reloc_status_type r;
2251 int tls_type;
2252
2253 r_type = ELF64_R_TYPE (rel->r_info);
2254 if (r_type == (int) R_390_GNU_VTINHERIT
2255 || r_type == (int) R_390_GNU_VTENTRY)
2256 continue;
2257 if (r_type >= (int) R_390_max)
2258 {
2259 bfd_set_error (bfd_error_bad_value);
2260 return FALSE;
2261 }
2262
2263 howto = elf_howto_table + r_type;
2264 r_symndx = ELF64_R_SYM (rel->r_info);
2265
2266 /* This is a final link. */
2267 h = NULL;
2268 sym = NULL;
2269 sec = NULL;
2270 unresolved_reloc = FALSE;
2271 if (r_symndx < symtab_hdr->sh_info)
2272 {
2273 sym = local_syms + r_symndx;
2274 sec = local_sections[r_symndx];
2275 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2276 }
2277 else
2278 {
2279 bfd_boolean warned ATTRIBUTE_UNUSED;
2280
2281 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2282 r_symndx, symtab_hdr, sym_hashes,
2283 h, sec, relocation,
2284 unresolved_reloc, warned);
2285 }
2286
2287 switch (r_type)
2288 {
2289 case R_390_GOTPLT12:
2290 case R_390_GOTPLT16:
2291 case R_390_GOTPLT20:
2292 case R_390_GOTPLT32:
2293 case R_390_GOTPLT64:
2294 case R_390_GOTPLTENT:
2295 /* There are three cases for a GOTPLT relocation. 1) The
2296 relocation is against the jump slot entry of a plt that
2297 will get emitted to the output file. 2) The relocation
2298 is against the jump slot of a plt entry that has been
2299 removed. elf_s390_adjust_gotplt has created a GOT entry
2300 as replacement. 3) The relocation is against a local symbol.
2301 Cases 2) and 3) are the same as the GOT relocation code
2302 so we just have to test for case 1 and fall through for
2303 the other two. */
2304 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2305 {
2306 bfd_vma plt_index;
2307
2308 /* Calc. index no.
2309 Current offset - size first entry / entry size. */
2310 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2311 PLT_ENTRY_SIZE;
2312
2313 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2314 addr & GOT addr. */
2315 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2316 unresolved_reloc = FALSE;
2317
2318 if (r_type == R_390_GOTPLTENT)
2319 relocation += htab->sgot->output_section->vma;
2320 break;
2321 }
2322 /* Fall through. */
2323
2324 case R_390_GOT12:
2325 case R_390_GOT16:
2326 case R_390_GOT20:
2327 case R_390_GOT32:
2328 case R_390_GOT64:
2329 case R_390_GOTENT:
2330 /* Relocation is to the entry for this symbol in the global
2331 offset table. */
2332 if (htab->sgot == NULL)
2333 abort ();
2334
2335 if (h != NULL)
2336 {
2337 bfd_boolean dyn;
2338
2339 off = h->got.offset;
2340 dyn = htab->elf.dynamic_sections_created;
2341 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2342 || (info->shared
2343 && (info->symbolic
2344 || h->dynindx == -1
2345 || h->forced_local)
2346 && h->def_regular)
2347 || (ELF_ST_VISIBILITY (h->other)
2348 && h->root.type == bfd_link_hash_undefweak))
2349 {
2350 /* This is actually a static link, or it is a
2351 -Bsymbolic link and the symbol is defined
2352 locally, or the symbol was forced to be local
2353 because of a version file. We must initialize
2354 this entry in the global offset table. Since the
2355 offset must always be a multiple of 2, we use the
2356 least significant bit to record whether we have
2357 initialized it already.
2358
2359 When doing a dynamic link, we create a .rel.got
2360 relocation entry to initialize the value. This
2361 is done in the finish_dynamic_symbol routine. */
2362 if ((off & 1) != 0)
2363 off &= ~1;
2364 else
2365 {
2366 bfd_put_64 (output_bfd, relocation,
2367 htab->sgot->contents + off);
2368 h->got.offset |= 1;
2369 }
2370 }
2371 else
2372 unresolved_reloc = FALSE;
2373 }
2374 else
2375 {
2376 if (local_got_offsets == NULL)
2377 abort ();
2378
2379 off = local_got_offsets[r_symndx];
2380
2381 /* The offset must always be a multiple of 8. We use
2382 the least significant bit to record whether we have
2383 already generated the necessary reloc. */
2384 if ((off & 1) != 0)
2385 off &= ~1;
2386 else
2387 {
2388 bfd_put_64 (output_bfd, relocation,
2389 htab->sgot->contents + off);
2390
2391 if (info->shared)
2392 {
2393 asection *s;
2394 Elf_Internal_Rela outrel;
2395 bfd_byte *loc;
2396
2397 s = htab->srelgot;
2398 if (s == NULL)
2399 abort ();
2400
2401 outrel.r_offset = (htab->sgot->output_section->vma
2402 + htab->sgot->output_offset
2403 + off);
2404 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2405 outrel.r_addend = relocation;
2406 loc = s->contents;
2407 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2408 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2409 }
2410
2411 local_got_offsets[r_symndx] |= 1;
2412 }
2413 }
2414
2415 if (off >= (bfd_vma) -2)
2416 abort ();
2417
2418 relocation = htab->sgot->output_offset + off;
2419
2420 /* For @GOTENT the relocation is against the offset between
2421 the instruction and the symbols entry in the GOT and not
2422 between the start of the GOT and the symbols entry. We
2423 add the vma of the GOT to get the correct value. */
2424 if ( r_type == R_390_GOTENT
2425 || r_type == R_390_GOTPLTENT)
2426 relocation += htab->sgot->output_section->vma;
2427
2428 break;
2429
2430 case R_390_GOTOFF16:
2431 case R_390_GOTOFF32:
2432 case R_390_GOTOFF64:
2433 /* Relocation is relative to the start of the global offset
2434 table. */
2435
2436 /* Note that sgot->output_offset is not involved in this
2437 calculation. We always want the start of .got. If we
2438 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2439 permitted by the ABI, we might have to change this
2440 calculation. */
2441 relocation -= htab->sgot->output_section->vma;
2442 break;
2443
2444 case R_390_GOTPC:
2445 case R_390_GOTPCDBL:
2446 /* Use global offset table as symbol value. */
2447 relocation = htab->sgot->output_section->vma;
2448 unresolved_reloc = FALSE;
2449 break;
2450
2451 case R_390_PLT16DBL:
2452 case R_390_PLT32:
2453 case R_390_PLT32DBL:
2454 case R_390_PLT64:
2455 /* Relocation is to the entry for this symbol in the
2456 procedure linkage table. */
2457
2458 /* Resolve a PLT32 reloc against a local symbol directly,
2459 without using the procedure linkage table. */
2460 if (h == NULL)
2461 break;
2462
2463 if (h->plt.offset == (bfd_vma) -1
2464 || htab->splt == NULL)
2465 {
2466 /* We didn't make a PLT entry for this symbol. This
2467 happens when statically linking PIC code, or when
2468 using -Bsymbolic. */
2469 break;
2470 }
2471
2472 relocation = (htab->splt->output_section->vma
2473 + htab->splt->output_offset
2474 + h->plt.offset);
2475 unresolved_reloc = FALSE;
2476 break;
2477
2478 case R_390_PLTOFF16:
2479 case R_390_PLTOFF32:
2480 case R_390_PLTOFF64:
2481 /* Relocation is to the entry for this symbol in the
2482 procedure linkage table relative to the start of the GOT. */
2483
2484 /* For local symbols or if we didn't make a PLT entry for
2485 this symbol resolve the symbol directly. */
2486 if ( h == NULL
2487 || h->plt.offset == (bfd_vma) -1
2488 || htab->splt == NULL)
2489 {
2490 relocation -= htab->sgot->output_section->vma;
2491 break;
2492 }
2493
2494 relocation = (htab->splt->output_section->vma
2495 + htab->splt->output_offset
2496 + h->plt.offset
2497 - htab->sgot->output_section->vma);
2498 unresolved_reloc = FALSE;
2499 break;
2500
2501 case R_390_8:
2502 case R_390_16:
2503 case R_390_32:
2504 case R_390_64:
2505 case R_390_PC16:
2506 case R_390_PC16DBL:
2507 case R_390_PC32:
2508 case R_390_PC32DBL:
2509 case R_390_PC64:
2510 /* r_symndx will be zero only for relocs against symbols
2511 from removed linkonce sections, or sections discarded by
2512 a linker script. */
2513 if (r_symndx == 0
2514 || (input_section->flags & SEC_ALLOC) == 0)
2515 break;
2516
2517 if ((info->shared
2518 && (h == NULL
2519 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2520 || h->root.type != bfd_link_hash_undefweak)
2521 && ((r_type != R_390_PC16
2522 && r_type != R_390_PC16DBL
2523 && r_type != R_390_PC32
2524 && r_type != R_390_PC32DBL
2525 && r_type != R_390_PC64)
2526 || (h != NULL
2527 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2528 || (ELIMINATE_COPY_RELOCS
2529 && !info->shared
2530 && h != NULL
2531 && h->dynindx != -1
2532 && !h->non_got_ref
2533 && ((h->def_dynamic
2534 && !h->def_regular)
2535 || h->root.type == bfd_link_hash_undefweak
2536 || h->root.type == bfd_link_hash_undefined)))
2537 {
2538 Elf_Internal_Rela outrel;
2539 bfd_boolean skip, relocate;
2540 asection *sreloc;
2541 bfd_byte *loc;
2542
2543 /* When generating a shared object, these relocations
2544 are copied into the output file to be resolved at run
2545 time. */
2546 skip = FALSE;
2547 relocate = FALSE;
2548
2549 outrel.r_offset =
2550 _bfd_elf_section_offset (output_bfd, info, input_section,
2551 rel->r_offset);
2552 if (outrel.r_offset == (bfd_vma) -1)
2553 skip = TRUE;
2554 else if (outrel.r_offset == (bfd_vma) -2)
2555 skip = TRUE, relocate = TRUE;
2556
2557 outrel.r_offset += (input_section->output_section->vma
2558 + input_section->output_offset);
2559
2560 if (skip)
2561 memset (&outrel, 0, sizeof outrel);
2562 else if (h != NULL
2563 && h->dynindx != -1
2564 && (r_type == R_390_PC16
2565 || r_type == R_390_PC16DBL
2566 || r_type == R_390_PC32
2567 || r_type == R_390_PC32DBL
2568 || r_type == R_390_PC64
2569 || !info->shared
2570 || !info->symbolic
2571 || !h->def_regular))
2572 {
2573 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2574 outrel.r_addend = rel->r_addend;
2575 }
2576 else
2577 {
2578 /* This symbol is local, or marked to become local. */
2579 outrel.r_addend = relocation + rel->r_addend;
2580 if (r_type == R_390_64)
2581 {
2582 relocate = TRUE;
2583 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2584 }
2585 else
2586 {
2587 long sindx;
2588
2589 if (bfd_is_abs_section (sec))
2590 sindx = 0;
2591 else if (sec == NULL || sec->owner == NULL)
2592 {
2593 bfd_set_error(bfd_error_bad_value);
2594 return FALSE;
2595 }
2596 else
2597 {
2598 asection *osec;
2599
2600 osec = sec->output_section;
2601 sindx = elf_section_data (osec)->dynindx;
2602 BFD_ASSERT (sindx > 0);
2603
2604 /* We are turning this relocation into one
2605 against a section symbol, so subtract out
2606 the output section's address but not the
2607 offset of the input section in the output
2608 section. */
2609
2610 outrel.r_addend -= osec->vma;
2611 }
2612 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2613 }
2614 }
2615
2616 sreloc = elf_section_data (input_section)->sreloc;
2617 if (sreloc == NULL)
2618 abort ();
2619
2620 loc = sreloc->contents;
2621 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2622 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2623
2624 /* If this reloc is against an external symbol, we do
2625 not want to fiddle with the addend. Otherwise, we
2626 need to include the symbol value so that it becomes
2627 an addend for the dynamic reloc. */
2628 if (! relocate)
2629 continue;
2630 }
2631
2632 break;
2633
2634 /* Relocations for tls literal pool entries. */
2635 case R_390_TLS_IE64:
2636 if (info->shared)
2637 {
2638 Elf_Internal_Rela outrel;
2639 asection *sreloc;
2640 bfd_byte *loc;
2641
2642 outrel.r_offset = rel->r_offset
2643 + input_section->output_section->vma
2644 + input_section->output_offset;
2645 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2646 sreloc = elf_section_data (input_section)->sreloc;
2647 if (sreloc == NULL)
2648 abort ();
2649 loc = sreloc->contents;
2650 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2651 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2652 }
2653 /* Fall through. */
2654
2655 case R_390_TLS_GD64:
2656 case R_390_TLS_GOTIE64:
2657 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2658 tls_type = GOT_UNKNOWN;
2659 if (h == NULL && local_got_offsets)
2660 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2661 else if (h != NULL)
2662 {
2663 tls_type = elf_s390_hash_entry(h)->tls_type;
2664 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2665 r_type = R_390_TLS_LE64;
2666 }
2667 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2668 r_type = R_390_TLS_IE64;
2669
2670 if (r_type == R_390_TLS_LE64)
2671 {
2672 /* This relocation gets optimized away by the local exec
2673 access optimization. */
2674 BFD_ASSERT (! unresolved_reloc);
2675 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2676 contents + rel->r_offset);
2677 continue;
2678 }
2679
2680 if (htab->sgot == NULL)
2681 abort ();
2682
2683 if (h != NULL)
2684 off = h->got.offset;
2685 else
2686 {
2687 if (local_got_offsets == NULL)
2688 abort ();
2689
2690 off = local_got_offsets[r_symndx];
2691 }
2692
2693 emit_tls_relocs:
2694
2695 if ((off & 1) != 0)
2696 off &= ~1;
2697 else
2698 {
2699 Elf_Internal_Rela outrel;
2700 bfd_byte *loc;
2701 int dr_type, indx;
2702
2703 if (htab->srelgot == NULL)
2704 abort ();
2705
2706 outrel.r_offset = (htab->sgot->output_section->vma
2707 + htab->sgot->output_offset + off);
2708
2709 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2710 if (r_type == R_390_TLS_GD64)
2711 dr_type = R_390_TLS_DTPMOD;
2712 else
2713 dr_type = R_390_TLS_TPOFF;
2714 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2715 outrel.r_addend = relocation - dtpoff_base (info);
2716 else
2717 outrel.r_addend = 0;
2718 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2719 loc = htab->srelgot->contents;
2720 loc += htab->srelgot->reloc_count++
2721 * sizeof (Elf64_External_Rela);
2722 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2723
2724 if (r_type == R_390_TLS_GD64)
2725 {
2726 if (indx == 0)
2727 {
2728 BFD_ASSERT (! unresolved_reloc);
2729 bfd_put_64 (output_bfd,
2730 relocation - dtpoff_base (info),
2731 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2732 }
2733 else
2734 {
2735 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2736 outrel.r_offset += GOT_ENTRY_SIZE;
2737 outrel.r_addend = 0;
2738 htab->srelgot->reloc_count++;
2739 loc += sizeof (Elf64_External_Rela);
2740 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2741 }
2742 }
2743
2744 if (h != NULL)
2745 h->got.offset |= 1;
2746 else
2747 local_got_offsets[r_symndx] |= 1;
2748 }
2749
2750 if (off >= (bfd_vma) -2)
2751 abort ();
2752 if (r_type == ELF64_R_TYPE (rel->r_info))
2753 {
2754 relocation = htab->sgot->output_offset + off;
2755 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2756 relocation += htab->sgot->output_section->vma;
2757 unresolved_reloc = FALSE;
2758 }
2759 else
2760 {
2761 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2762 contents + rel->r_offset);
2763 continue;
2764 }
2765 break;
2766
2767 case R_390_TLS_GOTIE12:
2768 case R_390_TLS_GOTIE20:
2769 case R_390_TLS_IEENT:
2770 if (h == NULL)
2771 {
2772 if (local_got_offsets == NULL)
2773 abort();
2774 off = local_got_offsets[r_symndx];
2775 if (info->shared)
2776 goto emit_tls_relocs;
2777 }
2778 else
2779 {
2780 off = h->got.offset;
2781 tls_type = elf_s390_hash_entry(h)->tls_type;
2782 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2783 goto emit_tls_relocs;
2784 }
2785
2786 if (htab->sgot == NULL)
2787 abort ();
2788
2789 BFD_ASSERT (! unresolved_reloc);
2790 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2791 htab->sgot->contents + off);
2792 relocation = htab->sgot->output_offset + off;
2793 if (r_type == R_390_TLS_IEENT)
2794 relocation += htab->sgot->output_section->vma;
2795 unresolved_reloc = FALSE;
2796 break;
2797
2798 case R_390_TLS_LDM64:
2799 if (! info->shared)
2800 /* The literal pool entry this relocation refers to gets ignored
2801 by the optimized code of the local exec model. Do nothing
2802 and the value will turn out zero. */
2803 continue;
2804
2805 if (htab->sgot == NULL)
2806 abort ();
2807
2808 off = htab->tls_ldm_got.offset;
2809 if (off & 1)
2810 off &= ~1;
2811 else
2812 {
2813 Elf_Internal_Rela outrel;
2814 bfd_byte *loc;
2815
2816 if (htab->srelgot == NULL)
2817 abort ();
2818
2819 outrel.r_offset = (htab->sgot->output_section->vma
2820 + htab->sgot->output_offset + off);
2821
2822 bfd_put_64 (output_bfd, 0,
2823 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2824 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2825 outrel.r_addend = 0;
2826 loc = htab->srelgot->contents;
2827 loc += htab->srelgot->reloc_count++
2828 * sizeof (Elf64_External_Rela);
2829 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2830 htab->tls_ldm_got.offset |= 1;
2831 }
2832 relocation = htab->sgot->output_offset + off;
2833 unresolved_reloc = FALSE;
2834 break;
2835
2836 case R_390_TLS_LE64:
2837 if (info->shared)
2838 {
2839 /* Linking a shared library with non-fpic code requires
2840 a R_390_TLS_TPOFF relocation. */
2841 Elf_Internal_Rela outrel;
2842 asection *sreloc;
2843 bfd_byte *loc;
2844 int indx;
2845
2846 outrel.r_offset = rel->r_offset
2847 + input_section->output_section->vma
2848 + input_section->output_offset;
2849 if (h != NULL && h->dynindx != -1)
2850 indx = h->dynindx;
2851 else
2852 indx = 0;
2853 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2854 if (indx == 0)
2855 outrel.r_addend = relocation - dtpoff_base (info);
2856 else
2857 outrel.r_addend = 0;
2858 sreloc = elf_section_data (input_section)->sreloc;
2859 if (sreloc == NULL)
2860 abort ();
2861 loc = sreloc->contents;
2862 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2863 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2864 }
2865 else
2866 {
2867 BFD_ASSERT (! unresolved_reloc);
2868 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2869 contents + rel->r_offset);
2870 }
2871 continue;
2872
2873 case R_390_TLS_LDO64:
2874 if (info->shared || (input_section->flags & SEC_CODE) == 0)
2875 relocation -= dtpoff_base (info);
2876 else
2877 /* When converting LDO to LE, we must negate. */
2878 relocation = -tpoff (info, relocation);
2879 break;
2880
2881 /* Relocations for tls instructions. */
2882 case R_390_TLS_LOAD:
2883 case R_390_TLS_GDCALL:
2884 case R_390_TLS_LDCALL:
2885 tls_type = GOT_UNKNOWN;
2886 if (h == NULL && local_got_offsets)
2887 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2888 else if (h != NULL)
2889 tls_type = elf_s390_hash_entry(h)->tls_type;
2890
2891 if (tls_type == GOT_TLS_GD)
2892 continue;
2893
2894 if (r_type == R_390_TLS_LOAD)
2895 {
2896 if (!info->shared && (h == NULL || h->dynindx == -1))
2897 {
2898 /* IE->LE transition. Four valid cases:
2899 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2900 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2901 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2902 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2903 unsigned int insn0, insn1, ry;
2904
2905 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2906 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2907 if (insn1 != 0x0004)
2908 invalid_tls_insn (input_bfd, input_section, rel);
2909 ry = 0;
2910 if ((insn0 & 0xff00f000) == 0xe3000000)
2911 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2912 ry = (insn0 & 0x000f0000);
2913 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2914 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2915 ry = (insn0 & 0x0000f000) << 4;
2916 else if ((insn0 & 0xff00f000) == 0xe300c000)
2917 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2918 ry = (insn0 & 0x000f0000);
2919 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2920 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2921 ry = (insn0 & 0x0000f000) << 4;
2922 else
2923 invalid_tls_insn (input_bfd, input_section, rel);
2924 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2925 insn1 = 0x000d;
2926 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2927 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2928 }
2929 }
2930 else if (r_type == R_390_TLS_GDCALL)
2931 {
2932 unsigned int insn0, insn1;
2933
2934 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2935 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2936 if ((insn0 & 0xffff0000) != 0xc0e50000)
2937 invalid_tls_insn (input_bfd, input_section, rel);
2938 if (!info->shared && (h == NULL || h->dynindx == -1))
2939 {
2940 /* GD->LE transition.
2941 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2942 insn0 = 0xc0040000;
2943 insn1 = 0x0000;
2944 }
2945 else
2946 {
2947 /* GD->IE transition.
2948 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2949 insn0 = 0xe322c000;
2950 insn1 = 0x0004;
2951 }
2952 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2953 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2954 }
2955 else if (r_type == R_390_TLS_LDCALL)
2956 {
2957 if (!info->shared)
2958 {
2959 unsigned int insn0, insn1;
2960
2961 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2962 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2963 if ((insn0 & 0xffff0000) != 0xc0e50000)
2964 invalid_tls_insn (input_bfd, input_section, rel);
2965 /* LD->LE transition.
2966 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2967 insn0 = 0xc0040000;
2968 insn1 = 0x0000;
2969 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2970 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2971 }
2972 }
2973 continue;
2974
2975 default:
2976 break;
2977 }
2978
2979 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2980 because such sections are not SEC_ALLOC and thus ld.so will
2981 not process them. */
2982 if (unresolved_reloc
2983 && !((input_section->flags & SEC_DEBUGGING) != 0
2984 && h->def_dynamic))
2985 (*_bfd_error_handler)
2986 (_("%B(%A+0x%lx): unresolvable relocation against symbol `%s'"),
2987 input_bfd,
2988 input_section,
2989 (long) rel->r_offset,
2990 h->root.root.string);
2991
2992 if (r_type == R_390_20
2993 || r_type == R_390_GOT20
2994 || r_type == R_390_GOTPLT20
2995 || r_type == R_390_TLS_GOTIE20)
2996 {
2997 relocation += rel->r_addend;
2998 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
2999 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3000 contents, rel->r_offset,
3001 relocation, 0);
3002 }
3003 else
3004 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3005 contents, rel->r_offset,
3006 relocation, rel->r_addend);
3007
3008 if (r != bfd_reloc_ok)
3009 {
3010 const char *name;
3011
3012 if (h != NULL)
3013 name = h->root.root.string;
3014 else
3015 {
3016 name = bfd_elf_string_from_elf_section (input_bfd,
3017 symtab_hdr->sh_link,
3018 sym->st_name);
3019 if (name == NULL)
3020 return FALSE;
3021 if (*name == '\0')
3022 name = bfd_section_name (input_bfd, sec);
3023 }
3024
3025 if (r == bfd_reloc_overflow)
3026 {
3027
3028 if (! ((*info->callbacks->reloc_overflow)
3029 (info, (h ? &h->root : NULL), name, howto->name,
3030 (bfd_vma) 0, input_bfd, input_section,
3031 rel->r_offset)))
3032 return FALSE;
3033 }
3034 else
3035 {
3036 (*_bfd_error_handler)
3037 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3038 input_bfd, input_section,
3039 (long) rel->r_offset, name, (int) r);
3040 return FALSE;
3041 }
3042 }
3043 }
3044
3045 return TRUE;
3046 }
3047
3048 /* Finish up dynamic symbol handling. We set the contents of various
3049 dynamic sections here. */
3050
3051 static bfd_boolean
3052 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3053 bfd *output_bfd;
3054 struct bfd_link_info *info;
3055 struct elf_link_hash_entry *h;
3056 Elf_Internal_Sym *sym;
3057 {
3058 struct elf_s390_link_hash_table *htab;
3059
3060 htab = elf_s390_hash_table (info);
3061
3062 if (h->plt.offset != (bfd_vma) -1)
3063 {
3064 bfd_vma plt_index;
3065 bfd_vma got_offset;
3066 Elf_Internal_Rela rela;
3067 bfd_byte *loc;
3068
3069 /* This symbol has an entry in the procedure linkage table. Set
3070 it up. */
3071
3072 if (h->dynindx == -1
3073 || htab->splt == NULL
3074 || htab->sgotplt == NULL
3075 || htab->srelplt == NULL)
3076 abort ();
3077
3078 /* Calc. index no.
3079 Current offset - size first entry / entry size. */
3080 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3081
3082 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3083 addr & GOT addr. */
3084 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3085
3086 /* Fill in the blueprint of a PLT. */
3087 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3088 htab->splt->contents + h->plt.offset);
3089 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3090 htab->splt->contents + h->plt.offset + 4);
3091 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3092 htab->splt->contents + h->plt.offset + 8);
3093 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3094 htab->splt->contents + h->plt.offset + 12);
3095 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3096 htab->splt->contents + h->plt.offset + 16);
3097 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3098 htab->splt->contents + h->plt.offset + 20);
3099 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3100 htab->splt->contents + h->plt.offset + 24);
3101 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3102 htab->splt->contents + h->plt.offset + 28);
3103 /* Fixup the relative address to the GOT entry */
3104 bfd_put_32 (output_bfd,
3105 (htab->sgotplt->output_section->vma +
3106 htab->sgotplt->output_offset + got_offset
3107 - (htab->splt->output_section->vma + h->plt.offset))/2,
3108 htab->splt->contents + h->plt.offset + 2);
3109 /* Fixup the relative branch to PLT 0 */
3110 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3111 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3112 htab->splt->contents + h->plt.offset + 24);
3113 /* Fixup offset into symbol table */
3114 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3115 htab->splt->contents + h->plt.offset + 28);
3116
3117 /* Fill in the entry in the global offset table.
3118 Points to instruction after GOT offset. */
3119 bfd_put_64 (output_bfd,
3120 (htab->splt->output_section->vma
3121 + htab->splt->output_offset
3122 + h->plt.offset
3123 + 14),
3124 htab->sgotplt->contents + got_offset);
3125
3126 /* Fill in the entry in the .rela.plt section. */
3127 rela.r_offset = (htab->sgotplt->output_section->vma
3128 + htab->sgotplt->output_offset
3129 + got_offset);
3130 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3131 rela.r_addend = 0;
3132 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3133 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3134
3135 if (!h->def_regular)
3136 {
3137 /* Mark the symbol as undefined, rather than as defined in
3138 the .plt section. Leave the value alone. This is a clue
3139 for the dynamic linker, to make function pointer
3140 comparisons work between an application and shared
3141 library. */
3142 sym->st_shndx = SHN_UNDEF;
3143 }
3144 }
3145
3146 if (h->got.offset != (bfd_vma) -1
3147 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3148 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3149 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3150 {
3151 Elf_Internal_Rela rela;
3152 bfd_byte *loc;
3153
3154 /* This symbol has an entry in the global offset table. Set it
3155 up. */
3156 if (htab->sgot == NULL || htab->srelgot == NULL)
3157 abort ();
3158
3159 rela.r_offset = (htab->sgot->output_section->vma
3160 + htab->sgot->output_offset
3161 + (h->got.offset &~ (bfd_vma) 1));
3162
3163 /* If this is a static link, or it is a -Bsymbolic link and the
3164 symbol is defined locally or was forced to be local because
3165 of a version file, we just want to emit a RELATIVE reloc.
3166 The entry in the global offset table will already have been
3167 initialized in the relocate_section function. */
3168 if (info->shared
3169 && (info->symbolic
3170 || h->dynindx == -1
3171 || h->forced_local)
3172 && h->def_regular)
3173 {
3174 BFD_ASSERT((h->got.offset & 1) != 0);
3175 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3176 rela.r_addend = (h->root.u.def.value
3177 + h->root.u.def.section->output_section->vma
3178 + h->root.u.def.section->output_offset);
3179 }
3180 else
3181 {
3182 BFD_ASSERT((h->got.offset & 1) == 0);
3183 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3184 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3185 rela.r_addend = 0;
3186 }
3187
3188 loc = htab->srelgot->contents;
3189 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3190 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3191 }
3192
3193 if (h->needs_copy)
3194 {
3195 Elf_Internal_Rela rela;
3196 bfd_byte *loc;
3197
3198 /* This symbols needs a copy reloc. Set it up. */
3199
3200 if (h->dynindx == -1
3201 || (h->root.type != bfd_link_hash_defined
3202 && h->root.type != bfd_link_hash_defweak)
3203 || htab->srelbss == NULL)
3204 abort ();
3205
3206 rela.r_offset = (h->root.u.def.value
3207 + h->root.u.def.section->output_section->vma
3208 + h->root.u.def.section->output_offset);
3209 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3210 rela.r_addend = 0;
3211 loc = htab->srelbss->contents;
3212 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3213 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3214 }
3215
3216 /* Mark some specially defined symbols as absolute. */
3217 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3218 || strcmp (h->root.root.string, "_GLOBAL_OFFSET_TABLE_") == 0
3219 || strcmp (h->root.root.string, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3220 sym->st_shndx = SHN_ABS;
3221
3222 return TRUE;
3223 }
3224
3225 /* Used to decide how to sort relocs in an optimal manner for the
3226 dynamic linker, before writing them out. */
3227
3228 static enum elf_reloc_type_class
3229 elf_s390_reloc_type_class (rela)
3230 const Elf_Internal_Rela *rela;
3231 {
3232 switch ((int) ELF64_R_TYPE (rela->r_info))
3233 {
3234 case R_390_RELATIVE:
3235 return reloc_class_relative;
3236 case R_390_JMP_SLOT:
3237 return reloc_class_plt;
3238 case R_390_COPY:
3239 return reloc_class_copy;
3240 default:
3241 return reloc_class_normal;
3242 }
3243 }
3244
3245 /* Finish up the dynamic sections. */
3246
3247 static bfd_boolean
3248 elf_s390_finish_dynamic_sections (output_bfd, info)
3249 bfd *output_bfd;
3250 struct bfd_link_info *info;
3251 {
3252 struct elf_s390_link_hash_table *htab;
3253 bfd *dynobj;
3254 asection *sdyn;
3255
3256 htab = elf_s390_hash_table (info);
3257 dynobj = htab->elf.dynobj;
3258 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3259
3260 if (htab->elf.dynamic_sections_created)
3261 {
3262 Elf64_External_Dyn *dyncon, *dynconend;
3263
3264 if (sdyn == NULL || htab->sgot == NULL)
3265 abort ();
3266
3267 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3268 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3269 for (; dyncon < dynconend; dyncon++)
3270 {
3271 Elf_Internal_Dyn dyn;
3272 asection *s;
3273
3274 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3275
3276 switch (dyn.d_tag)
3277 {
3278 default:
3279 continue;
3280
3281 case DT_PLTGOT:
3282 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3283 break;
3284
3285 case DT_JMPREL:
3286 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3287 break;
3288
3289 case DT_PLTRELSZ:
3290 s = htab->srelplt->output_section;
3291 dyn.d_un.d_val = s->size;
3292 break;
3293
3294 case DT_RELASZ:
3295 /* The procedure linkage table relocs (DT_JMPREL) should
3296 not be included in the overall relocs (DT_RELA).
3297 Therefore, we override the DT_RELASZ entry here to
3298 make it not include the JMPREL relocs. Since the
3299 linker script arranges for .rela.plt to follow all
3300 other relocation sections, we don't have to worry
3301 about changing the DT_RELA entry. */
3302 s = htab->srelplt->output_section;
3303 dyn.d_un.d_val -= s->size;
3304 break;
3305 }
3306
3307 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3308 }
3309
3310 /* Fill in the special first entry in the procedure linkage table. */
3311 if (htab->splt && htab->splt->size > 0)
3312 {
3313 /* fill in blueprint for plt 0 entry */
3314 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3315 htab->splt->contents );
3316 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3317 htab->splt->contents +4 );
3318 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3319 htab->splt->contents +12 );
3320 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3321 htab->splt->contents +16 );
3322 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3323 htab->splt->contents +20 );
3324 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3325 htab->splt->contents + 24);
3326 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3327 htab->splt->contents + 28 );
3328 /* Fixup relative address to start of GOT */
3329 bfd_put_32 (output_bfd,
3330 (htab->sgotplt->output_section->vma +
3331 htab->sgotplt->output_offset
3332 - htab->splt->output_section->vma - 6)/2,
3333 htab->splt->contents + 8);
3334 }
3335 elf_section_data (htab->splt->output_section)
3336 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3337 }
3338
3339 if (htab->sgotplt)
3340 {
3341 /* Fill in the first three entries in the global offset table. */
3342 if (htab->sgotplt->size > 0)
3343 {
3344 bfd_put_64 (output_bfd,
3345 (sdyn == NULL ? (bfd_vma) 0
3346 : sdyn->output_section->vma + sdyn->output_offset),
3347 htab->sgotplt->contents);
3348 /* One entry for shared object struct ptr. */
3349 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3350 /* One entry for _dl_runtime_resolve. */
3351 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3352 }
3353
3354 elf_section_data (htab->sgot->output_section)
3355 ->this_hdr.sh_entsize = 8;
3356 }
3357 return TRUE;
3358 }
3359
3360 /* Return address for Ith PLT stub in section PLT, for relocation REL
3361 or (bfd_vma) -1 if it should not be included. */
3362
3363 static bfd_vma
3364 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3365 const arelent *rel ATTRIBUTE_UNUSED)
3366 {
3367 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3368 }
3369
3370
3371 /* Why was the hash table entry size definition changed from
3372 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3373 this is the only reason for the s390_elf64_size_info structure. */
3374
3375 const struct elf_size_info s390_elf64_size_info =
3376 {
3377 sizeof (Elf64_External_Ehdr),
3378 sizeof (Elf64_External_Phdr),
3379 sizeof (Elf64_External_Shdr),
3380 sizeof (Elf64_External_Rel),
3381 sizeof (Elf64_External_Rela),
3382 sizeof (Elf64_External_Sym),
3383 sizeof (Elf64_External_Dyn),
3384 sizeof (Elf_External_Note),
3385 8, /* hash-table entry size. */
3386 1, /* internal relocations per external relocations. */
3387 64, /* arch_size. */
3388 3, /* log_file_align. */
3389 ELFCLASS64, EV_CURRENT,
3390 bfd_elf64_write_out_phdrs,
3391 bfd_elf64_write_shdrs_and_ehdr,
3392 bfd_elf64_write_relocs,
3393 bfd_elf64_swap_symbol_in,
3394 bfd_elf64_swap_symbol_out,
3395 bfd_elf64_slurp_reloc_table,
3396 bfd_elf64_slurp_symbol_table,
3397 bfd_elf64_swap_dyn_in,
3398 bfd_elf64_swap_dyn_out,
3399 bfd_elf64_swap_reloc_in,
3400 bfd_elf64_swap_reloc_out,
3401 bfd_elf64_swap_reloca_in,
3402 bfd_elf64_swap_reloca_out
3403 };
3404
3405 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3406 #define TARGET_BIG_NAME "elf64-s390"
3407 #define ELF_ARCH bfd_arch_s390
3408 #define ELF_MACHINE_CODE EM_S390
3409 #define ELF_MACHINE_ALT1 EM_S390_OLD
3410 #define ELF_MAXPAGESIZE 0x1000
3411
3412 #define elf_backend_size_info s390_elf64_size_info
3413
3414 #define elf_backend_can_gc_sections 1
3415 #define elf_backend_can_refcount 1
3416 #define elf_backend_want_got_plt 1
3417 #define elf_backend_plt_readonly 1
3418 #define elf_backend_want_plt_sym 0
3419 #define elf_backend_got_header_size 24
3420 #define elf_backend_rela_normal 1
3421
3422 #define elf_info_to_howto elf_s390_info_to_howto
3423
3424 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3425 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3426 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3427
3428 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3429 #define elf_backend_check_relocs elf_s390_check_relocs
3430 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3431 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3432 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3433 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3434 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3435 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3436 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3437 #define elf_backend_relocate_section elf_s390_relocate_section
3438 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3439 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3440 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3441
3442 #define bfd_elf64_mkobject elf_s390_mkobject
3443 #define elf_backend_object_p elf_s390_object_p
3444
3445 #include "elf64-target.h"
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