]> git.ipfire.org Git - thirdparty/binutils-gdb.git/blob - bfd/elf64-s390.c
projects / thirdparty / binutils-gdb.git / blob
? search:
summary | shortlog | log | commit | commitdiff | tree
blame | history | raw | HEAD
* aout-adobe.c (aout_32_bfd_reloc_name_lookup): Define.
[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, 2005, 2006, 2007
3 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 2 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "bfd.h"
24 #include "sysdep.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28
29 static reloc_howto_type *elf_s390_reloc_type_lookup
30 PARAMS ((bfd *, bfd_reloc_code_real_type));
31 static void elf_s390_info_to_howto
32 PARAMS ((bfd *, arelent *, Elf_Internal_Rela *));
33 static bfd_boolean elf_s390_is_local_label_name
34 PARAMS ((bfd *, const char *));
35 static struct bfd_hash_entry *link_hash_newfunc
36 PARAMS ((struct bfd_hash_entry *, struct bfd_hash_table *, const char *));
37 static struct bfd_link_hash_table *elf_s390_link_hash_table_create
38 PARAMS ((bfd *));
39 static bfd_boolean create_got_section
40 PARAMS((bfd *, struct bfd_link_info *));
41 static bfd_boolean elf_s390_create_dynamic_sections
42 PARAMS((bfd *, struct bfd_link_info *));
43 static void elf_s390_copy_indirect_symbol
44 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *,
45 struct elf_link_hash_entry *));
46 static bfd_boolean elf_s390_check_relocs
47 PARAMS ((bfd *, struct bfd_link_info *, asection *,
48 const Elf_Internal_Rela *));
49 struct elf_s390_link_hash_entry;
50 static void elf_s390_adjust_gotplt
51 PARAMS ((struct elf_s390_link_hash_entry *));
52 static bfd_boolean elf_s390_adjust_dynamic_symbol
53 PARAMS ((struct bfd_link_info *, struct elf_link_hash_entry *));
54 static bfd_boolean allocate_dynrelocs
55 PARAMS ((struct elf_link_hash_entry *, PTR));
56 static bfd_boolean readonly_dynrelocs
57 PARAMS ((struct elf_link_hash_entry *, PTR));
58 static bfd_boolean elf_s390_size_dynamic_sections
59 PARAMS ((bfd *, struct bfd_link_info *));
60 static bfd_boolean elf_s390_relocate_section
61 PARAMS ((bfd *, struct bfd_link_info *, bfd *, asection *, bfd_byte *,
62 Elf_Internal_Rela *, Elf_Internal_Sym *, asection **));
63 static bfd_boolean elf_s390_finish_dynamic_symbol
64 PARAMS ((bfd *, struct bfd_link_info *, struct elf_link_hash_entry *,
65 Elf_Internal_Sym *));
66 static enum elf_reloc_type_class elf_s390_reloc_type_class
67 PARAMS ((const Elf_Internal_Rela *));
68 static bfd_boolean elf_s390_finish_dynamic_sections
69 PARAMS ((bfd *, struct bfd_link_info *));
70 static bfd_boolean elf_s390_object_p
71 PARAMS ((bfd *));
72 static int elf_s390_tls_transition
73 PARAMS ((struct bfd_link_info *, int, int));
74 static bfd_reloc_status_type s390_tls_reloc
75 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
76 static bfd_vma dtpoff_base
77 PARAMS ((struct bfd_link_info *));
78 static bfd_vma tpoff
79 PARAMS ((struct bfd_link_info *, bfd_vma));
80 static void invalid_tls_insn
81 PARAMS ((bfd *, asection *, Elf_Internal_Rela *));
82 static bfd_reloc_status_type s390_elf_ldisp_reloc
83 PARAMS ((bfd *, arelent *, asymbol *, PTR, asection *, bfd *, char **));
84
85 #include "elf/s390.h"
86
87 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
88 from smaller values. Start with zero, widen, *then* decrement. */
89 #define MINUS_ONE (((bfd_vma)0) - 1)
90
91 /* The relocation "howto" table. */
92 static reloc_howto_type elf_howto_table[] =
93 {
94 HOWTO (R_390_NONE, /* type */
95 0, /* rightshift */
96 0, /* size (0 = byte, 1 = short, 2 = long) */
97 0, /* bitsize */
98 FALSE, /* pc_relative */
99 0, /* bitpos */
100 complain_overflow_dont, /* complain_on_overflow */
101 bfd_elf_generic_reloc, /* special_function */
102 "R_390_NONE", /* name */
103 FALSE, /* partial_inplace */
104 0, /* src_mask */
105 0, /* dst_mask */
106 FALSE), /* pcrel_offset */
107
108 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
110 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
111 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
112 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
114 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
115 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
116 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
118 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
120 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
122 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
124 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
126 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
128 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
131 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
132 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
133 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
134 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
136 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
137 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
138 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
140 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
142 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
144 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
145 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
146 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
148 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
150 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
152 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
154 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
156 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
158 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
160 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
162 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
164 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
165 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
166 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
167 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
168 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
169 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
170 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
171 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
172 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
174 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
176 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
178 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
180 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
181 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
182 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
183 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
184 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
185 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
186 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
187 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
188 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
189 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
190 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
191 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
192 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
193 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
194 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
195 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
196 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
197 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
198 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
199 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
200 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
201 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
202 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
203 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
204 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
205 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
206 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
207 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
208 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
209 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
210 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
211 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
212 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
213 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
214 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
215 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
216 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
217 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
218 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
219 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
220 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
221 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
222 };
223
224 /* GNU extension to record C++ vtable hierarchy. */
225 static reloc_howto_type elf64_s390_vtinherit_howto =
226 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
227 static reloc_howto_type elf64_s390_vtentry_howto =
228 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
229
230 static reloc_howto_type *
231 elf_s390_reloc_type_lookup (abfd, code)
232 bfd *abfd ATTRIBUTE_UNUSED;
233 bfd_reloc_code_real_type code;
234 {
235 switch (code)
236 {
237 case BFD_RELOC_NONE:
238 return &elf_howto_table[(int) R_390_NONE];
239 case BFD_RELOC_8:
240 return &elf_howto_table[(int) R_390_8];
241 case BFD_RELOC_390_12:
242 return &elf_howto_table[(int) R_390_12];
243 case BFD_RELOC_16:
244 return &elf_howto_table[(int) R_390_16];
245 case BFD_RELOC_32:
246 return &elf_howto_table[(int) R_390_32];
247 case BFD_RELOC_CTOR:
248 return &elf_howto_table[(int) R_390_32];
249 case BFD_RELOC_32_PCREL:
250 return &elf_howto_table[(int) R_390_PC32];
251 case BFD_RELOC_390_GOT12:
252 return &elf_howto_table[(int) R_390_GOT12];
253 case BFD_RELOC_32_GOT_PCREL:
254 return &elf_howto_table[(int) R_390_GOT32];
255 case BFD_RELOC_390_PLT32:
256 return &elf_howto_table[(int) R_390_PLT32];
257 case BFD_RELOC_390_COPY:
258 return &elf_howto_table[(int) R_390_COPY];
259 case BFD_RELOC_390_GLOB_DAT:
260 return &elf_howto_table[(int) R_390_GLOB_DAT];
261 case BFD_RELOC_390_JMP_SLOT:
262 return &elf_howto_table[(int) R_390_JMP_SLOT];
263 case BFD_RELOC_390_RELATIVE:
264 return &elf_howto_table[(int) R_390_RELATIVE];
265 case BFD_RELOC_32_GOTOFF:
266 return &elf_howto_table[(int) R_390_GOTOFF32];
267 case BFD_RELOC_390_GOTPC:
268 return &elf_howto_table[(int) R_390_GOTPC];
269 case BFD_RELOC_390_GOT16:
270 return &elf_howto_table[(int) R_390_GOT16];
271 case BFD_RELOC_16_PCREL:
272 return &elf_howto_table[(int) R_390_PC16];
273 case BFD_RELOC_390_PC16DBL:
274 return &elf_howto_table[(int) R_390_PC16DBL];
275 case BFD_RELOC_390_PLT16DBL:
276 return &elf_howto_table[(int) R_390_PLT16DBL];
277 case BFD_RELOC_390_PC32DBL:
278 return &elf_howto_table[(int) R_390_PC32DBL];
279 case BFD_RELOC_390_PLT32DBL:
280 return &elf_howto_table[(int) R_390_PLT32DBL];
281 case BFD_RELOC_390_GOTPCDBL:
282 return &elf_howto_table[(int) R_390_GOTPCDBL];
283 case BFD_RELOC_64:
284 return &elf_howto_table[(int) R_390_64];
285 case BFD_RELOC_64_PCREL:
286 return &elf_howto_table[(int) R_390_PC64];
287 case BFD_RELOC_390_GOT64:
288 return &elf_howto_table[(int) R_390_GOT64];
289 case BFD_RELOC_390_PLT64:
290 return &elf_howto_table[(int) R_390_PLT64];
291 case BFD_RELOC_390_GOTENT:
292 return &elf_howto_table[(int) R_390_GOTENT];
293 case BFD_RELOC_16_GOTOFF:
294 return &elf_howto_table[(int) R_390_GOTOFF16];
295 case BFD_RELOC_390_GOTOFF64:
296 return &elf_howto_table[(int) R_390_GOTOFF64];
297 case BFD_RELOC_390_GOTPLT12:
298 return &elf_howto_table[(int) R_390_GOTPLT12];
299 case BFD_RELOC_390_GOTPLT16:
300 return &elf_howto_table[(int) R_390_GOTPLT16];
301 case BFD_RELOC_390_GOTPLT32:
302 return &elf_howto_table[(int) R_390_GOTPLT32];
303 case BFD_RELOC_390_GOTPLT64:
304 return &elf_howto_table[(int) R_390_GOTPLT64];
305 case BFD_RELOC_390_GOTPLTENT:
306 return &elf_howto_table[(int) R_390_GOTPLTENT];
307 case BFD_RELOC_390_PLTOFF16:
308 return &elf_howto_table[(int) R_390_PLTOFF16];
309 case BFD_RELOC_390_PLTOFF32:
310 return &elf_howto_table[(int) R_390_PLTOFF32];
311 case BFD_RELOC_390_PLTOFF64:
312 return &elf_howto_table[(int) R_390_PLTOFF64];
313 case BFD_RELOC_390_TLS_LOAD:
314 return &elf_howto_table[(int) R_390_TLS_LOAD];
315 case BFD_RELOC_390_TLS_GDCALL:
316 return &elf_howto_table[(int) R_390_TLS_GDCALL];
317 case BFD_RELOC_390_TLS_LDCALL:
318 return &elf_howto_table[(int) R_390_TLS_LDCALL];
319 case BFD_RELOC_390_TLS_GD64:
320 return &elf_howto_table[(int) R_390_TLS_GD64];
321 case BFD_RELOC_390_TLS_GOTIE12:
322 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
323 case BFD_RELOC_390_TLS_GOTIE64:
324 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
325 case BFD_RELOC_390_TLS_LDM64:
326 return &elf_howto_table[(int) R_390_TLS_LDM64];
327 case BFD_RELOC_390_TLS_IE64:
328 return &elf_howto_table[(int) R_390_TLS_IE64];
329 case BFD_RELOC_390_TLS_IEENT:
330 return &elf_howto_table[(int) R_390_TLS_IEENT];
331 case BFD_RELOC_390_TLS_LE64:
332 return &elf_howto_table[(int) R_390_TLS_LE64];
333 case BFD_RELOC_390_TLS_LDO64:
334 return &elf_howto_table[(int) R_390_TLS_LDO64];
335 case BFD_RELOC_390_TLS_DTPMOD:
336 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
337 case BFD_RELOC_390_TLS_DTPOFF:
338 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
339 case BFD_RELOC_390_TLS_TPOFF:
340 return &elf_howto_table[(int) R_390_TLS_TPOFF];
341 case BFD_RELOC_390_20:
342 return &elf_howto_table[(int) R_390_20];
343 case BFD_RELOC_390_GOT20:
344 return &elf_howto_table[(int) R_390_GOT20];
345 case BFD_RELOC_390_GOTPLT20:
346 return &elf_howto_table[(int) R_390_GOTPLT20];
347 case BFD_RELOC_390_TLS_GOTIE20:
348 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
349 case BFD_RELOC_VTABLE_INHERIT:
350 return &elf64_s390_vtinherit_howto;
351 case BFD_RELOC_VTABLE_ENTRY:
352 return &elf64_s390_vtentry_howto;
353 default:
354 break;
355 }
356 return 0;
357 }
358
359 static reloc_howto_type *
360 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
361 const char *r_name)
362 {
363 unsigned int i;
364
365 for (i = 0;
366 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
367 i++)
368 if (elf_howto_table[i].name != NULL
369 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
370 return &elf_howto_table[i];
371
372 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
373 return &elf64_s390_vtinherit_howto;
374 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
375 return &elf64_s390_vtentry_howto;
376
377 return NULL;
378 }
379
380 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
381 and elf64-s390.c has its own copy. */
382
383 static void
384 elf_s390_info_to_howto (abfd, cache_ptr, dst)
385 bfd *abfd ATTRIBUTE_UNUSED;
386 arelent *cache_ptr;
387 Elf_Internal_Rela *dst;
388 {
389 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
390 switch (r_type)
391 {
392 case R_390_GNU_VTINHERIT:
393 cache_ptr->howto = &elf64_s390_vtinherit_howto;
394 break;
395
396 case R_390_GNU_VTENTRY:
397 cache_ptr->howto = &elf64_s390_vtentry_howto;
398 break;
399
400 default:
401 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
402 {
403 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
404 abfd, (int) r_type);
405 r_type = R_390_NONE;
406 }
407 cache_ptr->howto = &elf_howto_table[r_type];
408 }
409 }
410
411 /* A relocation function which doesn't do anything. */
412 static bfd_reloc_status_type
413 s390_tls_reloc (abfd, reloc_entry, symbol, data, input_section,
414 output_bfd, error_message)
415 bfd *abfd ATTRIBUTE_UNUSED;
416 arelent *reloc_entry;
417 asymbol *symbol ATTRIBUTE_UNUSED;
418 PTR data ATTRIBUTE_UNUSED;
419 asection *input_section;
420 bfd *output_bfd;
421 char **error_message ATTRIBUTE_UNUSED;
422 {
423 if (output_bfd)
424 reloc_entry->address += input_section->output_offset;
425 return bfd_reloc_ok;
426 }
427
428 /* Handle the large displacement relocs. */
429 static bfd_reloc_status_type
430 s390_elf_ldisp_reloc (abfd, reloc_entry, symbol, data, input_section,
431 output_bfd, error_message)
432 bfd *abfd;
433 arelent *reloc_entry;
434 asymbol *symbol;
435 PTR data;
436 asection *input_section;
437 bfd *output_bfd;
438 char **error_message ATTRIBUTE_UNUSED;
439 {
440 reloc_howto_type *howto = reloc_entry->howto;
441 bfd_vma relocation;
442 bfd_vma insn;
443
444 if (output_bfd != (bfd *) NULL
445 && (symbol->flags & BSF_SECTION_SYM) == 0
446 && (! howto->partial_inplace
447 || reloc_entry->addend == 0))
448 {
449 reloc_entry->address += input_section->output_offset;
450 return bfd_reloc_ok;
451 }
452 if (output_bfd != NULL)
453 return bfd_reloc_continue;
454
455 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
456 return bfd_reloc_outofrange;
457
458 relocation = (symbol->value
459 + symbol->section->output_section->vma
460 + symbol->section->output_offset);
461 relocation += reloc_entry->addend;
462 if (howto->pc_relative)
463 {
464 relocation -= (input_section->output_section->vma
465 + input_section->output_offset);
466 relocation -= reloc_entry->address;
467 }
468
469 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
470 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
471 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
472
473 if ((bfd_signed_vma) relocation < - 0x80000
474 || (bfd_signed_vma) relocation > 0x7ffff)
475 return bfd_reloc_overflow;
476 else
477 return bfd_reloc_ok;
478 }
479
480 static bfd_boolean
481 elf_s390_is_local_label_name (abfd, name)
482 bfd *abfd;
483 const char *name;
484 {
485 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
486 return TRUE;
487
488 return _bfd_elf_is_local_label_name (abfd, name);
489 }
490
491 /* Functions for the 390 ELF linker. */
492
493 /* The name of the dynamic interpreter. This is put in the .interp
494 section. */
495
496 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
497
498 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
499 copying dynamic variables from a shared lib into an app's dynbss
500 section, and instead use a dynamic relocation to point into the
501 shared lib. */
502 #define ELIMINATE_COPY_RELOCS 1
503
504 /* The size in bytes of the first entry in the procedure linkage table. */
505 #define PLT_FIRST_ENTRY_SIZE 32
506 /* The size in bytes of an entry in the procedure linkage table. */
507 #define PLT_ENTRY_SIZE 32
508
509 #define GOT_ENTRY_SIZE 8
510
511 /* The first three entries in a procedure linkage table are reserved,
512 and the initial contents are unimportant (we zero them out).
513 Subsequent entries look like this. See the SVR4 ABI 386
514 supplement to see how this works. */
515
516 /* For the s390, simple addr offset can only be 0 - 4096.
517 To use the full 16777216 TB address space, several instructions
518 are needed to load an address in a register and execute
519 a branch( or just saving the address)
520
521 Furthermore, only r 0 and 1 are free to use!!! */
522
523 /* The first 3 words in the GOT are then reserved.
524 Word 0 is the address of the dynamic table.
525 Word 1 is a pointer to a structure describing the object
526 Word 2 is used to point to the loader entry address.
527
528 The code for PLT entries looks like this:
529
530 The GOT holds the address in the PLT to be executed.
531 The loader then gets:
532 24(15) = Pointer to the structure describing the object.
533 28(15) = Offset in symbol table
534 The loader must then find the module where the function is
535 and insert the address in the GOT.
536
537 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
538 LG 1,0(1) # 6 bytes Load address from GOT in r1
539 BCR 15,1 # 2 bytes Jump to address
540 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
541 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
542 BRCL 15,-x # 6 bytes Jump to start of PLT
543 .long ? # 4 bytes offset into symbol table
544
545 Total = 32 bytes per PLT entry
546 Fixup at offset 2: relative address to GOT entry
547 Fixup at offset 22: relative branch to PLT0
548 Fixup at offset 28: 32 bit offset into symbol table
549
550 A 32 bit offset into the symbol table is enough. It allows for symbol
551 tables up to a size of 2 gigabyte. A single dynamic object (the main
552 program, any shared library) is limited to 4GB in size and I want to see
553 the program that manages to have a symbol table of more than 2 GB with a
554 total size of at max 4 GB. */
555
556 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
557 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
558 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
559 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
560 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
561 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
562 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
563 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
564
565 /* The first PLT entry pushes the offset into the symbol table
566 from R1 onto the stack at 8(15) and the loader object info
567 at 12(15), loads the loader address in R1 and jumps to it. */
568
569 /* The first entry in the PLT:
570
571 PLT0:
572 STG 1,56(15) # r1 contains the offset into the symbol table
573 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
574 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
575 LG 1,16(1) # get entry address of loader
576 BCR 15,1 # jump to loader
577
578 Fixup at offset 8: relative address to start of GOT. */
579
580 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
581 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
582 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
583 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
584 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
585 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
586 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
587 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
588
589 /* The s390 linker needs to keep track of the number of relocs that it
590 decides to copy as dynamic relocs in check_relocs for each symbol.
591 This is so that it can later discard them if they are found to be
592 unnecessary. We store the information in a field extending the
593 regular ELF linker hash table. */
594
595 struct elf_s390_dyn_relocs
596 {
597 struct elf_s390_dyn_relocs *next;
598
599 /* The input section of the reloc. */
600 asection *sec;
601
602 /* Total number of relocs copied for the input section. */
603 bfd_size_type count;
604
605 /* Number of pc-relative relocs copied for the input section. */
606 bfd_size_type pc_count;
607 };
608
609 /* s390 ELF linker hash entry. */
610
611 struct elf_s390_link_hash_entry
612 {
613 struct elf_link_hash_entry elf;
614
615 /* Track dynamic relocs copied for this symbol. */
616 struct elf_s390_dyn_relocs *dyn_relocs;
617
618 /* Number of GOTPLT references for a function. */
619 bfd_signed_vma gotplt_refcount;
620
621 #define GOT_UNKNOWN 0
622 #define GOT_NORMAL 1
623 #define GOT_TLS_GD 2
624 #define GOT_TLS_IE 3
625 #define GOT_TLS_IE_NLT 3
626 unsigned char tls_type;
627 };
628
629 #define elf_s390_hash_entry(ent) \
630 ((struct elf_s390_link_hash_entry *)(ent))
631
632 struct elf_s390_obj_tdata
633 {
634 struct elf_obj_tdata root;
635
636 /* tls_type for each local got entry. */
637 char *local_got_tls_type;
638 };
639
640 #define elf_s390_tdata(abfd) \
641 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
642
643 #define elf_s390_local_got_tls_type(abfd) \
644 (elf_s390_tdata (abfd)->local_got_tls_type)
645
646 static bfd_boolean
647 elf_s390_mkobject (bfd *abfd)
648 {
649 if (abfd->tdata.any == NULL)
650 {
651 bfd_size_type amt = sizeof (struct elf_s390_obj_tdata);
652 abfd->tdata.any = bfd_zalloc (abfd, amt);
653 if (abfd->tdata.any == NULL)
654 return FALSE;
655 }
656 return bfd_elf_mkobject (abfd);
657 }
658
659 static bfd_boolean
660 elf_s390_object_p (abfd)
661 bfd *abfd;
662 {
663 /* Set the right machine number for an s390 elf32 file. */
664 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
665 }
666
667 /* s390 ELF linker hash table. */
668
669 struct elf_s390_link_hash_table
670 {
671 struct elf_link_hash_table elf;
672
673 /* Short-cuts to get to dynamic linker sections. */
674 asection *sgot;
675 asection *sgotplt;
676 asection *srelgot;
677 asection *splt;
678 asection *srelplt;
679 asection *sdynbss;
680 asection *srelbss;
681
682 union {
683 bfd_signed_vma refcount;
684 bfd_vma offset;
685 } tls_ldm_got;
686
687 /* Small local sym to section mapping cache. */
688 struct sym_sec_cache sym_sec;
689 };
690
691 /* Get the s390 ELF linker hash table from a link_info structure. */
692
693 #define elf_s390_hash_table(p) \
694 ((struct elf_s390_link_hash_table *) ((p)->hash))
695
696 /* Create an entry in an s390 ELF linker hash table. */
697
698 static struct bfd_hash_entry *
699 link_hash_newfunc (entry, table, string)
700 struct bfd_hash_entry *entry;
701 struct bfd_hash_table *table;
702 const char *string;
703 {
704 /* Allocate the structure if it has not already been allocated by a
705 subclass. */
706 if (entry == NULL)
707 {
708 entry = bfd_hash_allocate (table,
709 sizeof (struct elf_s390_link_hash_entry));
710 if (entry == NULL)
711 return entry;
712 }
713
714 /* Call the allocation method of the superclass. */
715 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
716 if (entry != NULL)
717 {
718 struct elf_s390_link_hash_entry *eh;
719
720 eh = (struct elf_s390_link_hash_entry *) entry;
721 eh->dyn_relocs = NULL;
722 eh->gotplt_refcount = 0;
723 eh->tls_type = GOT_UNKNOWN;
724 }
725
726 return entry;
727 }
728
729 /* Create an s390 ELF linker hash table. */
730
731 static struct bfd_link_hash_table *
732 elf_s390_link_hash_table_create (abfd)
733 bfd *abfd;
734 {
735 struct elf_s390_link_hash_table *ret;
736 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
737
738 ret = (struct elf_s390_link_hash_table *) bfd_malloc (amt);
739 if (ret == NULL)
740 return NULL;
741
742 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
743 sizeof (struct elf_s390_link_hash_entry)))
744 {
745 free (ret);
746 return NULL;
747 }
748
749 ret->sgot = NULL;
750 ret->sgotplt = NULL;
751 ret->srelgot = NULL;
752 ret->splt = NULL;
753 ret->srelplt = NULL;
754 ret->sdynbss = NULL;
755 ret->srelbss = NULL;
756 ret->tls_ldm_got.refcount = 0;
757 ret->sym_sec.abfd = NULL;
758
759 return &ret->elf.root;
760 }
761
762 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
763 shortcuts to them in our hash table. */
764
765 static bfd_boolean
766 create_got_section (dynobj, info)
767 bfd *dynobj;
768 struct bfd_link_info *info;
769 {
770 struct elf_s390_link_hash_table *htab;
771
772 if (! _bfd_elf_create_got_section (dynobj, info))
773 return FALSE;
774
775 htab = elf_s390_hash_table (info);
776 htab->sgot = bfd_get_section_by_name (dynobj, ".got");
777 htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt");
778 if (!htab->sgot || !htab->sgotplt)
779 abort ();
780
781 htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got",
782 (SEC_ALLOC | SEC_LOAD
783 | SEC_HAS_CONTENTS
784 | SEC_IN_MEMORY
785 | SEC_LINKER_CREATED
786 | SEC_READONLY));
787 if (htab->srelgot == NULL
788 || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3))
789 return FALSE;
790 return TRUE;
791 }
792
793 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
794 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
795 hash table. */
796
797 static bfd_boolean
798 elf_s390_create_dynamic_sections (dynobj, info)
799 bfd *dynobj;
800 struct bfd_link_info *info;
801 {
802 struct elf_s390_link_hash_table *htab;
803
804 htab = elf_s390_hash_table (info);
805 if (!htab->sgot && !create_got_section (dynobj, info))
806 return FALSE;
807
808 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
809 return FALSE;
810
811 htab->splt = bfd_get_section_by_name (dynobj, ".plt");
812 htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt");
813 htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss");
814 if (!info->shared)
815 htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss");
816
817 if (!htab->splt || !htab->srelplt || !htab->sdynbss
818 || (!info->shared && !htab->srelbss))
819 abort ();
820
821 return TRUE;
822 }
823
824 /* Copy the extra info we tack onto an elf_link_hash_entry. */
825
826 static void
827 elf_s390_copy_indirect_symbol (info, dir, ind)
828 struct bfd_link_info *info;
829 struct elf_link_hash_entry *dir, *ind;
830 {
831 struct elf_s390_link_hash_entry *edir, *eind;
832
833 edir = (struct elf_s390_link_hash_entry *) dir;
834 eind = (struct elf_s390_link_hash_entry *) ind;
835
836 if (eind->dyn_relocs != NULL)
837 {
838 if (edir->dyn_relocs != NULL)
839 {
840 struct elf_s390_dyn_relocs **pp;
841 struct elf_s390_dyn_relocs *p;
842
843 /* Add reloc counts against the indirect sym to the direct sym
844 list. Merge any entries against the same section. */
845 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
846 {
847 struct elf_s390_dyn_relocs *q;
848
849 for (q = edir->dyn_relocs; q != NULL; q = q->next)
850 if (q->sec == p->sec)
851 {
852 q->pc_count += p->pc_count;
853 q->count += p->count;
854 *pp = p->next;
855 break;
856 }
857 if (q == NULL)
858 pp = &p->next;
859 }
860 *pp = edir->dyn_relocs;
861 }
862
863 edir->dyn_relocs = eind->dyn_relocs;
864 eind->dyn_relocs = NULL;
865 }
866
867 if (ind->root.type == bfd_link_hash_indirect
868 && dir->got.refcount <= 0)
869 {
870 edir->tls_type = eind->tls_type;
871 eind->tls_type = GOT_UNKNOWN;
872 }
873
874 if (ELIMINATE_COPY_RELOCS
875 && ind->root.type != bfd_link_hash_indirect
876 && dir->dynamic_adjusted)
877 {
878 /* If called to transfer flags for a weakdef during processing
879 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
880 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
881 dir->ref_dynamic |= ind->ref_dynamic;
882 dir->ref_regular |= ind->ref_regular;
883 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
884 dir->needs_plt |= ind->needs_plt;
885 }
886 else
887 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
888 }
889
890 static int
891 elf_s390_tls_transition (info, r_type, is_local)
892 struct bfd_link_info *info;
893 int r_type;
894 int is_local;
895 {
896 if (info->shared)
897 return r_type;
898
899 switch (r_type)
900 {
901 case R_390_TLS_GD64:
902 case R_390_TLS_IE64:
903 if (is_local)
904 return R_390_TLS_LE64;
905 return R_390_TLS_IE64;
906 case R_390_TLS_GOTIE64:
907 if (is_local)
908 return R_390_TLS_LE64;
909 return R_390_TLS_GOTIE64;
910 case R_390_TLS_LDM64:
911 return R_390_TLS_LE64;
912 }
913
914 return r_type;
915 }
916
917 /* Look through the relocs for a section during the first phase, and
918 allocate space in the global offset table or procedure linkage
919 table. */
920
921 static bfd_boolean
922 elf_s390_check_relocs (abfd, info, sec, relocs)
923 bfd *abfd;
924 struct bfd_link_info *info;
925 asection *sec;
926 const Elf_Internal_Rela *relocs;
927 {
928 struct elf_s390_link_hash_table *htab;
929 Elf_Internal_Shdr *symtab_hdr;
930 struct elf_link_hash_entry **sym_hashes;
931 const Elf_Internal_Rela *rel;
932 const Elf_Internal_Rela *rel_end;
933 asection *sreloc;
934 bfd_signed_vma *local_got_refcounts;
935 int tls_type, old_tls_type;
936
937 if (info->relocatable)
938 return TRUE;
939
940 htab = elf_s390_hash_table (info);
941 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
942 sym_hashes = elf_sym_hashes (abfd);
943 local_got_refcounts = elf_local_got_refcounts (abfd);
944
945 sreloc = NULL;
946
947 rel_end = relocs + sec->reloc_count;
948 for (rel = relocs; rel < rel_end; rel++)
949 {
950 unsigned int r_type;
951 unsigned long r_symndx;
952 struct elf_link_hash_entry *h;
953
954 r_symndx = ELF64_R_SYM (rel->r_info);
955
956 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
957 {
958 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
959 abfd,
960 r_symndx);
961 return FALSE;
962 }
963
964 if (r_symndx < symtab_hdr->sh_info)
965 h = NULL;
966 else
967 {
968 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
969 while (h->root.type == bfd_link_hash_indirect
970 || h->root.type == bfd_link_hash_warning)
971 h = (struct elf_link_hash_entry *) h->root.u.i.link;
972 }
973
974 /* Create got section and local_got_refcounts array if they
975 are needed. */
976 r_type = elf_s390_tls_transition (info,
977 ELF64_R_TYPE (rel->r_info),
978 h == NULL);
979 switch (r_type)
980 {
981 case R_390_GOT12:
982 case R_390_GOT16:
983 case R_390_GOT20:
984 case R_390_GOT32:
985 case R_390_GOT64:
986 case R_390_GOTENT:
987 case R_390_GOTPLT12:
988 case R_390_GOTPLT16:
989 case R_390_GOTPLT20:
990 case R_390_GOTPLT32:
991 case R_390_GOTPLT64:
992 case R_390_GOTPLTENT:
993 case R_390_TLS_GD64:
994 case R_390_TLS_GOTIE12:
995 case R_390_TLS_GOTIE20:
996 case R_390_TLS_GOTIE64:
997 case R_390_TLS_IEENT:
998 case R_390_TLS_IE64:
999 case R_390_TLS_LDM64:
1000 if (h == NULL
1001 && local_got_refcounts == NULL)
1002 {
1003 bfd_size_type size;
1004
1005 size = symtab_hdr->sh_info;
1006 size *= (sizeof (bfd_signed_vma) + sizeof(char));
1007 local_got_refcounts = ((bfd_signed_vma *)
1008 bfd_zalloc (abfd, size));
1009 if (local_got_refcounts == NULL)
1010 return FALSE;
1011 elf_local_got_refcounts (abfd) = local_got_refcounts;
1012 elf_s390_local_got_tls_type (abfd)
1013 = (char *) (local_got_refcounts + symtab_hdr->sh_info);
1014 }
1015 /* Fall through. */
1016 case R_390_GOTOFF16:
1017 case R_390_GOTOFF32:
1018 case R_390_GOTOFF64:
1019 case R_390_GOTPC:
1020 case R_390_GOTPCDBL:
1021 if (htab->sgot == NULL)
1022 {
1023 if (htab->elf.dynobj == NULL)
1024 htab->elf.dynobj = abfd;
1025 if (!create_got_section (htab->elf.dynobj, info))
1026 return FALSE;
1027 }
1028 }
1029
1030 switch (r_type)
1031 {
1032 case R_390_GOTOFF16:
1033 case R_390_GOTOFF32:
1034 case R_390_GOTOFF64:
1035 case R_390_GOTPC:
1036 case R_390_GOTPCDBL:
1037 /* Got is created, nothing to be done. */
1038 break;
1039
1040 case R_390_PLT16DBL:
1041 case R_390_PLT32:
1042 case R_390_PLT32DBL:
1043 case R_390_PLT64:
1044 case R_390_PLTOFF16:
1045 case R_390_PLTOFF32:
1046 case R_390_PLTOFF64:
1047 /* This symbol requires a procedure linkage table entry. We
1048 actually build the entry in adjust_dynamic_symbol,
1049 because this might be a case of linking PIC code which is
1050 never referenced by a dynamic object, in which case we
1051 don't need to generate a procedure linkage table entry
1052 after all. */
1053
1054 /* If this is a local symbol, we resolve it directly without
1055 creating a procedure linkage table entry. */
1056 if (h != NULL)
1057 {
1058 h->needs_plt = 1;
1059 h->plt.refcount += 1;
1060 }
1061 break;
1062
1063 case R_390_GOTPLT12:
1064 case R_390_GOTPLT16:
1065 case R_390_GOTPLT20:
1066 case R_390_GOTPLT32:
1067 case R_390_GOTPLT64:
1068 case R_390_GOTPLTENT:
1069 /* This symbol requires either a procedure linkage table entry
1070 or an entry in the local got. We actually build the entry
1071 in adjust_dynamic_symbol because whether this is really a
1072 global reference can change and with it the fact if we have
1073 to create a plt entry or a local got entry. To be able to
1074 make a once global symbol a local one we have to keep track
1075 of the number of gotplt references that exist for this
1076 symbol. */
1077 if (h != NULL)
1078 {
1079 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1080 h->needs_plt = 1;
1081 h->plt.refcount += 1;
1082 }
1083 else
1084 local_got_refcounts[r_symndx] += 1;
1085 break;
1086
1087 case R_390_TLS_LDM64:
1088 htab->tls_ldm_got.refcount += 1;
1089 break;
1090
1091 case R_390_TLS_IE64:
1092 case R_390_TLS_GOTIE12:
1093 case R_390_TLS_GOTIE20:
1094 case R_390_TLS_GOTIE64:
1095 case R_390_TLS_IEENT:
1096 if (info->shared)
1097 info->flags |= DF_STATIC_TLS;
1098 /* Fall through */
1099
1100 case R_390_GOT12:
1101 case R_390_GOT16:
1102 case R_390_GOT20:
1103 case R_390_GOT32:
1104 case R_390_GOT64:
1105 case R_390_GOTENT:
1106 case R_390_TLS_GD64:
1107 /* This symbol requires a global offset table entry. */
1108 switch (r_type)
1109 {
1110 default:
1111 case R_390_GOT12:
1112 case R_390_GOT16:
1113 case R_390_GOT20:
1114 case R_390_GOT32:
1115 case R_390_GOTENT:
1116 tls_type = GOT_NORMAL;
1117 break;
1118 case R_390_TLS_GD64:
1119 tls_type = GOT_TLS_GD;
1120 break;
1121 case R_390_TLS_IE64:
1122 case R_390_TLS_GOTIE64:
1123 tls_type = GOT_TLS_IE;
1124 break;
1125 case R_390_TLS_GOTIE12:
1126 case R_390_TLS_GOTIE20:
1127 case R_390_TLS_IEENT:
1128 tls_type = GOT_TLS_IE_NLT;
1129 break;
1130 }
1131
1132 if (h != NULL)
1133 {
1134 h->got.refcount += 1;
1135 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1136 }
1137 else
1138 {
1139 local_got_refcounts[r_symndx] += 1;
1140 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1141 }
1142 /* If a TLS symbol is accessed using IE at least once,
1143 there is no point to use dynamic model for it. */
1144 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1145 {
1146 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1147 {
1148 (*_bfd_error_handler)
1149 (_("%B: `%s' accessed both as normal and thread local symbol"),
1150 abfd, h->root.root.string);
1151 return FALSE;
1152 }
1153 if (old_tls_type > tls_type)
1154 tls_type = old_tls_type;
1155 }
1156
1157 if (old_tls_type != tls_type)
1158 {
1159 if (h != NULL)
1160 elf_s390_hash_entry (h)->tls_type = tls_type;
1161 else
1162 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1163 }
1164
1165 if (r_type != R_390_TLS_IE64)
1166 break;
1167 /* Fall through */
1168
1169 case R_390_TLS_LE64:
1170 if (!info->shared)
1171 break;
1172 info->flags |= DF_STATIC_TLS;
1173 /* Fall through */
1174
1175 case R_390_8:
1176 case R_390_16:
1177 case R_390_32:
1178 case R_390_64:
1179 case R_390_PC16:
1180 case R_390_PC16DBL:
1181 case R_390_PC32:
1182 case R_390_PC32DBL:
1183 case R_390_PC64:
1184 if (h != NULL && !info->shared)
1185 {
1186 /* If this reloc is in a read-only section, we might
1187 need a copy reloc. We can't check reliably at this
1188 stage whether the section is read-only, as input
1189 sections have not yet been mapped to output sections.
1190 Tentatively set the flag for now, and correct in
1191 adjust_dynamic_symbol. */
1192 h->non_got_ref = 1;
1193
1194 /* We may need a .plt entry if the function this reloc
1195 refers to is in a shared lib. */
1196 h->plt.refcount += 1;
1197 }
1198
1199 /* If we are creating a shared library, and this is a reloc
1200 against a global symbol, or a non PC relative reloc
1201 against a local symbol, then we need to copy the reloc
1202 into the shared library. However, if we are linking with
1203 -Bsymbolic, we do not need to copy a reloc against a
1204 global symbol which is defined in an object we are
1205 including in the link (i.e., DEF_REGULAR is set). At
1206 this point we have not seen all the input files, so it is
1207 possible that DEF_REGULAR is not set now but will be set
1208 later (it is never cleared). In case of a weak definition,
1209 DEF_REGULAR may be cleared later by a strong definition in
1210 a shared library. We account for that possibility below by
1211 storing information in the relocs_copied field of the hash
1212 table entry. A similar situation occurs when creating
1213 shared libraries and symbol visibility changes render the
1214 symbol local.
1215
1216 If on the other hand, we are creating an executable, we
1217 may need to keep relocations for symbols satisfied by a
1218 dynamic library if we manage to avoid copy relocs for the
1219 symbol. */
1220 if ((info->shared
1221 && (sec->flags & SEC_ALLOC) != 0
1222 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1223 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1224 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1225 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1226 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1227 || (h != NULL
1228 && (! info->symbolic
1229 || h->root.type == bfd_link_hash_defweak
1230 || !h->def_regular))))
1231 || (ELIMINATE_COPY_RELOCS
1232 && !info->shared
1233 && (sec->flags & SEC_ALLOC) != 0
1234 && h != NULL
1235 && (h->root.type == bfd_link_hash_defweak
1236 || !h->def_regular)))
1237 {
1238 struct elf_s390_dyn_relocs *p;
1239 struct elf_s390_dyn_relocs **head;
1240
1241 /* We must copy these reloc types into the output file.
1242 Create a reloc section in dynobj and make room for
1243 this reloc. */
1244 if (sreloc == NULL)
1245 {
1246 const char *name;
1247 bfd *dynobj;
1248
1249 name = (bfd_elf_string_from_elf_section
1250 (abfd,
1251 elf_elfheader (abfd)->e_shstrndx,
1252 elf_section_data (sec)->rel_hdr.sh_name));
1253 if (name == NULL)
1254 return FALSE;
1255
1256 if (! CONST_STRNEQ (name, ".rela")
1257 || strcmp (bfd_get_section_name (abfd, sec),
1258 name + 5) != 0)
1259 {
1260 (*_bfd_error_handler)
1261 (_("%B: bad relocation section name `%s\'"),
1262 abfd, name);
1263 }
1264
1265 if (htab->elf.dynobj == NULL)
1266 htab->elf.dynobj = abfd;
1267
1268 dynobj = htab->elf.dynobj;
1269 sreloc = bfd_get_section_by_name (dynobj, name);
1270 if (sreloc == NULL)
1271 {
1272 flagword flags;
1273
1274 flags = (SEC_HAS_CONTENTS | SEC_READONLY
1275 | SEC_IN_MEMORY | SEC_LINKER_CREATED);
1276 if ((sec->flags & SEC_ALLOC) != 0)
1277 flags |= SEC_ALLOC | SEC_LOAD;
1278 sreloc = bfd_make_section_with_flags (dynobj,
1279 name,
1280 flags);
1281 if (sreloc == NULL
1282 || ! bfd_set_section_alignment (dynobj, sreloc, 3))
1283 return FALSE;
1284 }
1285 elf_section_data (sec)->sreloc = sreloc;
1286 }
1287
1288 /* If this is a global symbol, we count the number of
1289 relocations we need for this symbol. */
1290 if (h != NULL)
1291 {
1292 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1293 }
1294 else
1295 {
1296 /* Track dynamic relocs needed for local syms too.
1297 We really need local syms available to do this
1298 easily. Oh well. */
1299
1300 asection *s;
1301 void *vpp;
1302
1303 s = bfd_section_from_r_symndx (abfd, &htab->sym_sec,
1304 sec, r_symndx);
1305 if (s == NULL)
1306 return FALSE;
1307
1308 vpp = &elf_section_data (s)->local_dynrel;
1309 head = (struct elf_s390_dyn_relocs **) vpp;
1310 }
1311
1312 p = *head;
1313 if (p == NULL || p->sec != sec)
1314 {
1315 bfd_size_type amt = sizeof *p;
1316 p = ((struct elf_s390_dyn_relocs *)
1317 bfd_alloc (htab->elf.dynobj, amt));
1318 if (p == NULL)
1319 return FALSE;
1320 p->next = *head;
1321 *head = p;
1322 p->sec = sec;
1323 p->count = 0;
1324 p->pc_count = 0;
1325 }
1326
1327 p->count += 1;
1328 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1329 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1330 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1331 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1332 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1333 p->pc_count += 1;
1334 }
1335 break;
1336
1337 /* This relocation describes the C++ object vtable hierarchy.
1338 Reconstruct it for later use during GC. */
1339 case R_390_GNU_VTINHERIT:
1340 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1341 return FALSE;
1342 break;
1343
1344 /* This relocation describes which C++ vtable entries are actually
1345 used. Record for later use during GC. */
1346 case R_390_GNU_VTENTRY:
1347 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1348 return FALSE;
1349 break;
1350
1351 default:
1352 break;
1353 }
1354 }
1355
1356 return TRUE;
1357 }
1358
1359 /* Return the section that should be marked against GC for a given
1360 relocation. */
1361
1362 static asection *
1363 elf_s390_gc_mark_hook (asection *sec,
1364 struct bfd_link_info *info,
1365 Elf_Internal_Rela *rel,
1366 struct elf_link_hash_entry *h,
1367 Elf_Internal_Sym *sym)
1368 {
1369 if (h != NULL)
1370 switch (ELF64_R_TYPE (rel->r_info))
1371 {
1372 case R_390_GNU_VTINHERIT:
1373 case R_390_GNU_VTENTRY:
1374 return NULL;
1375 }
1376
1377 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1378 }
1379
1380 /* Update the got entry reference counts for the section being removed. */
1381
1382 static bfd_boolean
1383 elf_s390_gc_sweep_hook (bfd *abfd,
1384 struct bfd_link_info *info,
1385 asection *sec,
1386 const Elf_Internal_Rela *relocs)
1387 {
1388 Elf_Internal_Shdr *symtab_hdr;
1389 struct elf_link_hash_entry **sym_hashes;
1390 bfd_signed_vma *local_got_refcounts;
1391 const Elf_Internal_Rela *rel, *relend;
1392
1393 elf_section_data (sec)->local_dynrel = NULL;
1394
1395 symtab_hdr = &elf_tdata (abfd)->symtab_hdr;
1396 sym_hashes = elf_sym_hashes (abfd);
1397 local_got_refcounts = elf_local_got_refcounts (abfd);
1398
1399 relend = relocs + sec->reloc_count;
1400 for (rel = relocs; rel < relend; rel++)
1401 {
1402 unsigned long r_symndx;
1403 unsigned int r_type;
1404 struct elf_link_hash_entry *h = NULL;
1405
1406 r_symndx = ELF64_R_SYM (rel->r_info);
1407 if (r_symndx >= symtab_hdr->sh_info)
1408 {
1409 struct elf_s390_link_hash_entry *eh;
1410 struct elf_s390_dyn_relocs **pp;
1411 struct elf_s390_dyn_relocs *p;
1412
1413 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1414 while (h->root.type == bfd_link_hash_indirect
1415 || h->root.type == bfd_link_hash_warning)
1416 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1417 eh = (struct elf_s390_link_hash_entry *) h;
1418
1419 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1420 if (p->sec == sec)
1421 {
1422 /* Everything must go for SEC. */
1423 *pp = p->next;
1424 break;
1425 }
1426 }
1427
1428 r_type = ELF64_R_TYPE (rel->r_info);
1429 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1430 switch (r_type)
1431 {
1432 case R_390_TLS_LDM64:
1433 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1434 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1435 break;
1436
1437 case R_390_TLS_GD64:
1438 case R_390_TLS_IE64:
1439 case R_390_TLS_GOTIE12:
1440 case R_390_TLS_GOTIE20:
1441 case R_390_TLS_GOTIE64:
1442 case R_390_TLS_IEENT:
1443 case R_390_GOT12:
1444 case R_390_GOT16:
1445 case R_390_GOT20:
1446 case R_390_GOT32:
1447 case R_390_GOT64:
1448 case R_390_GOTOFF16:
1449 case R_390_GOTOFF32:
1450 case R_390_GOTOFF64:
1451 case R_390_GOTPC:
1452 case R_390_GOTPCDBL:
1453 case R_390_GOTENT:
1454 if (h != NULL)
1455 {
1456 if (h->got.refcount > 0)
1457 h->got.refcount -= 1;
1458 }
1459 else if (local_got_refcounts != NULL)
1460 {
1461 if (local_got_refcounts[r_symndx] > 0)
1462 local_got_refcounts[r_symndx] -= 1;
1463 }
1464 break;
1465
1466 case R_390_8:
1467 case R_390_12:
1468 case R_390_16:
1469 case R_390_20:
1470 case R_390_32:
1471 case R_390_64:
1472 case R_390_PC16:
1473 case R_390_PC16DBL:
1474 case R_390_PC32:
1475 case R_390_PC32DBL:
1476 case R_390_PC64:
1477 if (info->shared)
1478 break;
1479 /* Fall through */
1480
1481 case R_390_PLT16DBL:
1482 case R_390_PLT32:
1483 case R_390_PLT32DBL:
1484 case R_390_PLT64:
1485 case R_390_PLTOFF16:
1486 case R_390_PLTOFF32:
1487 case R_390_PLTOFF64:
1488 if (h != NULL)
1489 {
1490 if (h->plt.refcount > 0)
1491 h->plt.refcount -= 1;
1492 }
1493 break;
1494
1495 case R_390_GOTPLT12:
1496 case R_390_GOTPLT16:
1497 case R_390_GOTPLT20:
1498 case R_390_GOTPLT32:
1499 case R_390_GOTPLT64:
1500 case R_390_GOTPLTENT:
1501 if (h != NULL)
1502 {
1503 if (h->plt.refcount > 0)
1504 {
1505 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1506 h->plt.refcount -= 1;
1507 }
1508 }
1509 else if (local_got_refcounts != NULL)
1510 {
1511 if (local_got_refcounts[r_symndx] > 0)
1512 local_got_refcounts[r_symndx] -= 1;
1513 }
1514 break;
1515
1516 default:
1517 break;
1518 }
1519 }
1520
1521 return TRUE;
1522 }
1523
1524 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1525 entry but we found we will not create any. Called when we find we will
1526 not have any PLT for this symbol, by for example
1527 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1528 or elf_s390_size_dynamic_sections if no dynamic sections will be
1529 created (we're only linking static objects). */
1530
1531 static void
1532 elf_s390_adjust_gotplt (h)
1533 struct elf_s390_link_hash_entry *h;
1534 {
1535 if (h->elf.root.type == bfd_link_hash_warning)
1536 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1537
1538 if (h->gotplt_refcount <= 0)
1539 return;
1540
1541 /* We simply add the number of gotplt references to the number
1542 * of got references for this symbol. */
1543 h->elf.got.refcount += h->gotplt_refcount;
1544 h->gotplt_refcount = -1;
1545 }
1546
1547 /* Adjust a symbol defined by a dynamic object and referenced by a
1548 regular object. The current definition is in some section of the
1549 dynamic object, but we're not including those sections. We have to
1550 change the definition to something the rest of the link can
1551 understand. */
1552
1553 static bfd_boolean
1554 elf_s390_adjust_dynamic_symbol (info, h)
1555 struct bfd_link_info *info;
1556 struct elf_link_hash_entry *h;
1557 {
1558 struct elf_s390_link_hash_table *htab;
1559 asection *s;
1560 unsigned int power_of_two;
1561
1562 /* If this is a function, put it in the procedure linkage table. We
1563 will fill in the contents of the procedure linkage table later
1564 (although we could actually do it here). */
1565 if (h->type == STT_FUNC
1566 || h->needs_plt)
1567 {
1568 if (h->plt.refcount <= 0
1569 || (! info->shared
1570 && !h->def_dynamic
1571 && !h->ref_dynamic
1572 && h->root.type != bfd_link_hash_undefweak
1573 && h->root.type != bfd_link_hash_undefined))
1574 {
1575 /* This case can occur if we saw a PLT32 reloc in an input
1576 file, but the symbol was never referred to by a dynamic
1577 object, or if all references were garbage collected. In
1578 such a case, we don't actually need to build a procedure
1579 linkage table, and we can just do a PC32 reloc instead. */
1580 h->plt.offset = (bfd_vma) -1;
1581 h->needs_plt = 0;
1582 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1583 }
1584
1585 return TRUE;
1586 }
1587 else
1588 /* It's possible that we incorrectly decided a .plt reloc was
1589 needed for an R_390_PC32 reloc to a non-function sym in
1590 check_relocs. We can't decide accurately between function and
1591 non-function syms in check-relocs; Objects loaded later in
1592 the link may change h->type. So fix it now. */
1593 h->plt.offset = (bfd_vma) -1;
1594
1595 /* If this is a weak symbol, and there is a real definition, the
1596 processor independent code will have arranged for us to see the
1597 real definition first, and we can just use the same value. */
1598 if (h->u.weakdef != NULL)
1599 {
1600 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1601 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1602 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1603 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1604 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1605 h->non_got_ref = h->u.weakdef->non_got_ref;
1606 return TRUE;
1607 }
1608
1609 /* This is a reference to a symbol defined by a dynamic object which
1610 is not a function. */
1611
1612 /* If we are creating a shared library, we must presume that the
1613 only references to the symbol are via the global offset table.
1614 For such cases we need not do anything here; the relocations will
1615 be handled correctly by relocate_section. */
1616 if (info->shared)
1617 return TRUE;
1618
1619 /* If there are no references to this symbol that do not use the
1620 GOT, we don't need to generate a copy reloc. */
1621 if (!h->non_got_ref)
1622 return TRUE;
1623
1624 /* If -z nocopyreloc was given, we won't generate them either. */
1625 if (info->nocopyreloc)
1626 {
1627 h->non_got_ref = 0;
1628 return TRUE;
1629 }
1630
1631 if (ELIMINATE_COPY_RELOCS)
1632 {
1633 struct elf_s390_link_hash_entry * eh;
1634 struct elf_s390_dyn_relocs *p;
1635
1636 eh = (struct elf_s390_link_hash_entry *) h;
1637 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1638 {
1639 s = p->sec->output_section;
1640 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1641 break;
1642 }
1643
1644 /* If we didn't find any dynamic relocs in read-only sections, then
1645 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1646 if (p == NULL)
1647 {
1648 h->non_got_ref = 0;
1649 return TRUE;
1650 }
1651 }
1652
1653 if (h->size == 0)
1654 {
1655 (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"),
1656 h->root.root.string);
1657 return TRUE;
1658 }
1659
1660 /* We must allocate the symbol in our .dynbss section, which will
1661 become part of the .bss section of the executable. There will be
1662 an entry for this symbol in the .dynsym section. The dynamic
1663 object will contain position independent code, so all references
1664 from the dynamic object to this symbol will go through the global
1665 offset table. The dynamic linker will use the .dynsym entry to
1666 determine the address it must put in the global offset table, so
1667 both the dynamic object and the regular object will refer to the
1668 same memory location for the variable. */
1669
1670 htab = elf_s390_hash_table (info);
1671
1672 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1673 copy the initial value out of the dynamic object and into the
1674 runtime process image. */
1675 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0)
1676 {
1677 htab->srelbss->size += sizeof (Elf64_External_Rela);
1678 h->needs_copy = 1;
1679 }
1680
1681 /* We need to figure out the alignment required for this symbol. I
1682 have no idea how ELF linkers handle this. */
1683 power_of_two = bfd_log2 (h->size);
1684 if (power_of_two > 3)
1685 power_of_two = 3;
1686
1687 /* Apply the required alignment. */
1688 s = htab->sdynbss;
1689 s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two));
1690 if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s))
1691 {
1692 if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two))
1693 return FALSE;
1694 }
1695
1696 /* Define the symbol as being at this point in the section. */
1697 h->root.u.def.section = s;
1698 h->root.u.def.value = s->size;
1699
1700 /* Increment the section size to make room for the symbol. */
1701 s->size += h->size;
1702
1703 return TRUE;
1704 }
1705
1706 /* Allocate space in .plt, .got and associated reloc sections for
1707 dynamic relocs. */
1708
1709 static bfd_boolean
1710 allocate_dynrelocs (h, inf)
1711 struct elf_link_hash_entry *h;
1712 PTR inf;
1713 {
1714 struct bfd_link_info *info;
1715 struct elf_s390_link_hash_table *htab;
1716 struct elf_s390_link_hash_entry *eh;
1717 struct elf_s390_dyn_relocs *p;
1718
1719 if (h->root.type == bfd_link_hash_indirect)
1720 return TRUE;
1721
1722 if (h->root.type == bfd_link_hash_warning)
1723 /* When warning symbols are created, they **replace** the "real"
1724 entry in the hash table, thus we never get to see the real
1725 symbol in a hash traversal. So look at it now. */
1726 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1727
1728 info = (struct bfd_link_info *) inf;
1729 htab = elf_s390_hash_table (info);
1730
1731 if (htab->elf.dynamic_sections_created
1732 && h->plt.refcount > 0
1733 && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1734 || h->root.type != bfd_link_hash_undefweak))
1735 {
1736 /* Make sure this symbol is output as a dynamic symbol.
1737 Undefined weak syms won't yet be marked as dynamic. */
1738 if (h->dynindx == -1
1739 && !h->forced_local)
1740 {
1741 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1742 return FALSE;
1743 }
1744
1745 if (info->shared
1746 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1747 {
1748 asection *s = htab->splt;
1749
1750 /* If this is the first .plt entry, make room for the special
1751 first entry. */
1752 if (s->size == 0)
1753 s->size += PLT_FIRST_ENTRY_SIZE;
1754
1755 h->plt.offset = s->size;
1756
1757 /* If this symbol is not defined in a regular file, and we are
1758 not generating a shared library, then set the symbol to this
1759 location in the .plt. This is required to make function
1760 pointers compare as equal between the normal executable and
1761 the shared library. */
1762 if (! info->shared
1763 && !h->def_regular)
1764 {
1765 h->root.u.def.section = s;
1766 h->root.u.def.value = h->plt.offset;
1767 }
1768
1769 /* Make room for this entry. */
1770 s->size += PLT_ENTRY_SIZE;
1771
1772 /* We also need to make an entry in the .got.plt section, which
1773 will be placed in the .got section by the linker script. */
1774 htab->sgotplt->size += GOT_ENTRY_SIZE;
1775
1776 /* We also need to make an entry in the .rela.plt section. */
1777 htab->srelplt->size += sizeof (Elf64_External_Rela);
1778 }
1779 else
1780 {
1781 h->plt.offset = (bfd_vma) -1;
1782 h->needs_plt = 0;
1783 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1784 }
1785 }
1786 else
1787 {
1788 h->plt.offset = (bfd_vma) -1;
1789 h->needs_plt = 0;
1790 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1791 }
1792
1793 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1794 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1795 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1796 we can save the dynamic TLS relocation. */
1797 if (h->got.refcount > 0
1798 && !info->shared
1799 && h->dynindx == -1
1800 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1801 {
1802 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1803 /* For the GOTIE access without a literal pool entry the offset has
1804 to be stored somewhere. The immediate value in the instruction
1805 is not bit enough so the value is stored in the got. */
1806 {
1807 h->got.offset = htab->sgot->size;
1808 htab->sgot->size += GOT_ENTRY_SIZE;
1809 }
1810 else
1811 h->got.offset = (bfd_vma) -1;
1812 }
1813 else if (h->got.refcount > 0)
1814 {
1815 asection *s;
1816 bfd_boolean dyn;
1817 int tls_type = elf_s390_hash_entry(h)->tls_type;
1818
1819 /* Make sure this symbol is output as a dynamic symbol.
1820 Undefined weak syms won't yet be marked as dynamic. */
1821 if (h->dynindx == -1
1822 && !h->forced_local)
1823 {
1824 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1825 return FALSE;
1826 }
1827
1828 s = htab->sgot;
1829 h->got.offset = s->size;
1830 s->size += GOT_ENTRY_SIZE;
1831 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1832 if (tls_type == GOT_TLS_GD)
1833 s->size += GOT_ENTRY_SIZE;
1834 dyn = htab->elf.dynamic_sections_created;
1835 /* R_390_TLS_IE64 needs one dynamic relocation,
1836 R_390_TLS_GD64 needs one if local symbol and two if global. */
1837 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1838 || tls_type >= GOT_TLS_IE)
1839 htab->srelgot->size += sizeof (Elf64_External_Rela);
1840 else if (tls_type == GOT_TLS_GD)
1841 htab->srelgot->size += 2 * sizeof (Elf64_External_Rela);
1842 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1843 || h->root.type != bfd_link_hash_undefweak)
1844 && (info->shared
1845 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1846 htab->srelgot->size += sizeof (Elf64_External_Rela);
1847 }
1848 else
1849 h->got.offset = (bfd_vma) -1;
1850
1851 eh = (struct elf_s390_link_hash_entry *) h;
1852 if (eh->dyn_relocs == NULL)
1853 return TRUE;
1854
1855 /* In the shared -Bsymbolic case, discard space allocated for
1856 dynamic pc-relative relocs against symbols which turn out to be
1857 defined in regular objects. For the normal shared case, discard
1858 space for pc-relative relocs that have become local due to symbol
1859 visibility changes. */
1860
1861 if (info->shared)
1862 {
1863 if (SYMBOL_REFERENCES_LOCAL (info, h))
1864 {
1865 struct elf_s390_dyn_relocs **pp;
1866
1867 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1868 {
1869 p->count -= p->pc_count;
1870 p->pc_count = 0;
1871 if (p->count == 0)
1872 *pp = p->next;
1873 else
1874 pp = &p->next;
1875 }
1876 }
1877
1878 /* Also discard relocs on undefined weak syms with non-default
1879 visibility. */
1880 if (eh->dyn_relocs != NULL
1881 && h->root.type == bfd_link_hash_undefweak)
1882 {
1883 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1884 eh->dyn_relocs = NULL;
1885
1886 /* Make sure undefined weak symbols are output as a dynamic
1887 symbol in PIEs. */
1888 else if (h->dynindx == -1
1889 && !h->forced_local)
1890 {
1891 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1892 return FALSE;
1893 }
1894 }
1895 }
1896 else if (ELIMINATE_COPY_RELOCS)
1897 {
1898 /* For the non-shared case, discard space for relocs against
1899 symbols which turn out to need copy relocs or are not
1900 dynamic. */
1901
1902 if (!h->non_got_ref
1903 && ((h->def_dynamic
1904 && !h->def_regular)
1905 || (htab->elf.dynamic_sections_created
1906 && (h->root.type == bfd_link_hash_undefweak
1907 || h->root.type == bfd_link_hash_undefined))))
1908 {
1909 /* Make sure this symbol is output as a dynamic symbol.
1910 Undefined weak syms won't yet be marked as dynamic. */
1911 if (h->dynindx == -1
1912 && !h->forced_local)
1913 {
1914 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1915 return FALSE;
1916 }
1917
1918 /* If that succeeded, we know we'll be keeping all the
1919 relocs. */
1920 if (h->dynindx != -1)
1921 goto keep;
1922 }
1923
1924 eh->dyn_relocs = NULL;
1925
1926 keep: ;
1927 }
1928
1929 /* Finally, allocate space. */
1930 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1931 {
1932 asection *sreloc = elf_section_data (p->sec)->sreloc;
1933 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1934 }
1935
1936 return TRUE;
1937 }
1938
1939 /* Find any dynamic relocs that apply to read-only sections. */
1940
1941 static bfd_boolean
1942 readonly_dynrelocs (h, inf)
1943 struct elf_link_hash_entry *h;
1944 PTR inf;
1945 {
1946 struct elf_s390_link_hash_entry *eh;
1947 struct elf_s390_dyn_relocs *p;
1948
1949 if (h->root.type == bfd_link_hash_warning)
1950 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1951
1952 eh = (struct elf_s390_link_hash_entry *) h;
1953 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1954 {
1955 asection *s = p->sec->output_section;
1956
1957 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1958 {
1959 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1960
1961 info->flags |= DF_TEXTREL;
1962
1963 /* Not an error, just cut short the traversal. */
1964 return FALSE;
1965 }
1966 }
1967 return TRUE;
1968 }
1969
1970 /* Set the sizes of the dynamic sections. */
1971
1972 static bfd_boolean
1973 elf_s390_size_dynamic_sections (output_bfd, info)
1974 bfd *output_bfd ATTRIBUTE_UNUSED;
1975 struct bfd_link_info *info;
1976 {
1977 struct elf_s390_link_hash_table *htab;
1978 bfd *dynobj;
1979 asection *s;
1980 bfd_boolean relocs;
1981 bfd *ibfd;
1982
1983 htab = elf_s390_hash_table (info);
1984 dynobj = htab->elf.dynobj;
1985 if (dynobj == NULL)
1986 abort ();
1987
1988 if (htab->elf.dynamic_sections_created)
1989 {
1990 /* Set the contents of the .interp section to the interpreter. */
1991 if (info->executable)
1992 {
1993 s = bfd_get_section_by_name (dynobj, ".interp");
1994 if (s == NULL)
1995 abort ();
1996 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1997 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1998 }
1999 }
2000
2001 /* Set up .got offsets for local syms, and space for local dynamic
2002 relocs. */
2003 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2004 {
2005 bfd_signed_vma *local_got;
2006 bfd_signed_vma *end_local_got;
2007 char *local_tls_type;
2008 bfd_size_type locsymcount;
2009 Elf_Internal_Shdr *symtab_hdr;
2010 asection *srela;
2011
2012 if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour)
2013 continue;
2014
2015 for (s = ibfd->sections; s != NULL; s = s->next)
2016 {
2017 struct elf_s390_dyn_relocs *p;
2018
2019 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2020 {
2021 if (!bfd_is_abs_section (p->sec)
2022 && bfd_is_abs_section (p->sec->output_section))
2023 {
2024 /* Input section has been discarded, either because
2025 it is a copy of a linkonce section or due to
2026 linker script /DISCARD/, so we'll be discarding
2027 the relocs too. */
2028 }
2029 else if (p->count != 0)
2030 {
2031 srela = elf_section_data (p->sec)->sreloc;
2032 srela->size += p->count * sizeof (Elf64_External_Rela);
2033 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2034 info->flags |= DF_TEXTREL;
2035 }
2036 }
2037 }
2038
2039 local_got = elf_local_got_refcounts (ibfd);
2040 if (!local_got)
2041 continue;
2042
2043 symtab_hdr = &elf_tdata (ibfd)->symtab_hdr;
2044 locsymcount = symtab_hdr->sh_info;
2045 end_local_got = local_got + locsymcount;
2046 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2047 s = htab->sgot;
2048 srela = htab->srelgot;
2049 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2050 {
2051 if (*local_got > 0)
2052 {
2053 *local_got = s->size;
2054 s->size += GOT_ENTRY_SIZE;
2055 if (*local_tls_type == GOT_TLS_GD)
2056 s->size += GOT_ENTRY_SIZE;
2057 if (info->shared)
2058 srela->size += sizeof (Elf64_External_Rela);
2059 }
2060 else
2061 *local_got = (bfd_vma) -1;
2062 }
2063 }
2064
2065 if (htab->tls_ldm_got.refcount > 0)
2066 {
2067 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2068 relocs. */
2069 htab->tls_ldm_got.offset = htab->sgot->size;
2070 htab->sgot->size += 2 * GOT_ENTRY_SIZE;
2071 htab->srelgot->size += sizeof (Elf64_External_Rela);
2072 }
2073 else
2074 htab->tls_ldm_got.offset = -1;
2075
2076 /* Allocate global sym .plt and .got entries, and space for global
2077 sym dynamic relocs. */
2078 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info);
2079
2080 /* We now have determined the sizes of the various dynamic sections.
2081 Allocate memory for them. */
2082 relocs = FALSE;
2083 for (s = dynobj->sections; s != NULL; s = s->next)
2084 {
2085 if ((s->flags & SEC_LINKER_CREATED) == 0)
2086 continue;
2087
2088 if (s == htab->splt
2089 || s == htab->sgot
2090 || s == htab->sgotplt
2091 || s == htab->sdynbss)
2092 {
2093 /* Strip this section if we don't need it; see the
2094 comment below. */
2095 }
2096 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2097 {
2098 if (s->size != 0 && s != htab->srelplt)
2099 relocs = TRUE;
2100
2101 /* We use the reloc_count field as a counter if we need
2102 to copy relocs into the output file. */
2103 s->reloc_count = 0;
2104 }
2105 else
2106 {
2107 /* It's not one of our sections, so don't allocate space. */
2108 continue;
2109 }
2110
2111 if (s->size == 0)
2112 {
2113 /* If we don't need this section, strip it from the
2114 output file. This is to handle .rela.bss and
2115 .rela.plt. We must create it in
2116 create_dynamic_sections, because it must be created
2117 before the linker maps input sections to output
2118 sections. The linker does that before
2119 adjust_dynamic_symbol is called, and it is that
2120 function which decides whether anything needs to go
2121 into these sections. */
2122
2123 s->flags |= SEC_EXCLUDE;
2124 continue;
2125 }
2126
2127 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2128 continue;
2129
2130 /* Allocate memory for the section contents. We use bfd_zalloc
2131 here in case unused entries are not reclaimed before the
2132 section's contents are written out. This should not happen,
2133 but this way if it does, we get a R_390_NONE reloc instead
2134 of garbage. */
2135 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2136 if (s->contents == NULL)
2137 return FALSE;
2138 }
2139
2140 if (htab->elf.dynamic_sections_created)
2141 {
2142 /* Add some entries to the .dynamic section. We fill in the
2143 values later, in elf_s390_finish_dynamic_sections, but we
2144 must add the entries now so that we get the correct size for
2145 the .dynamic section. The DT_DEBUG entry is filled in by the
2146 dynamic linker and used by the debugger. */
2147 #define add_dynamic_entry(TAG, VAL) \
2148 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2149
2150 if (info->executable)
2151 {
2152 if (!add_dynamic_entry (DT_DEBUG, 0))
2153 return FALSE;
2154 }
2155
2156 if (htab->splt->size != 0)
2157 {
2158 if (!add_dynamic_entry (DT_PLTGOT, 0)
2159 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2160 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2161 || !add_dynamic_entry (DT_JMPREL, 0))
2162 return FALSE;
2163 }
2164
2165 if (relocs)
2166 {
2167 if (!add_dynamic_entry (DT_RELA, 0)
2168 || !add_dynamic_entry (DT_RELASZ, 0)
2169 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2170 return FALSE;
2171
2172 /* If any dynamic relocs apply to a read-only section,
2173 then we need a DT_TEXTREL entry. */
2174 if ((info->flags & DF_TEXTREL) == 0)
2175 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2176 (PTR) info);
2177
2178 if ((info->flags & DF_TEXTREL) != 0)
2179 {
2180 if (!add_dynamic_entry (DT_TEXTREL, 0))
2181 return FALSE;
2182 }
2183 }
2184 }
2185 #undef add_dynamic_entry
2186
2187 return TRUE;
2188 }
2189
2190 /* Return the base VMA address which should be subtracted from real addresses
2191 when resolving @dtpoff relocation.
2192 This is PT_TLS segment p_vaddr. */
2193
2194 static bfd_vma
2195 dtpoff_base (info)
2196 struct bfd_link_info *info;
2197 {
2198 /* If tls_sec is NULL, we should have signalled an error already. */
2199 if (elf_hash_table (info)->tls_sec == NULL)
2200 return 0;
2201 return elf_hash_table (info)->tls_sec->vma;
2202 }
2203
2204 /* Return the relocation value for @tpoff relocation
2205 if STT_TLS virtual address is ADDRESS. */
2206
2207 static bfd_vma
2208 tpoff (info, address)
2209 struct bfd_link_info *info;
2210 bfd_vma address;
2211 {
2212 struct elf_link_hash_table *htab = elf_hash_table (info);
2213
2214 /* If tls_sec is NULL, we should have signalled an error already. */
2215 if (htab->tls_sec == NULL)
2216 return 0;
2217 return htab->tls_size + htab->tls_sec->vma - address;
2218 }
2219
2220 /* Complain if TLS instruction relocation is against an invalid
2221 instruction. */
2222
2223 static void
2224 invalid_tls_insn (input_bfd, input_section, rel)
2225 bfd *input_bfd;
2226 asection *input_section;
2227 Elf_Internal_Rela *rel;
2228 {
2229 reloc_howto_type *howto;
2230
2231 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2232 (*_bfd_error_handler)
2233 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2234 input_bfd,
2235 input_section,
2236 (long) rel->r_offset,
2237 howto->name);
2238 bfd_set_error (bfd_error_bad_value);
2239 }
2240
2241 /* Relocate a 390 ELF section. */
2242
2243 static bfd_boolean
2244 elf_s390_relocate_section (output_bfd, info, input_bfd, input_section,
2245 contents, relocs, local_syms, local_sections)
2246 bfd *output_bfd;
2247 struct bfd_link_info *info;
2248 bfd *input_bfd;
2249 asection *input_section;
2250 bfd_byte *contents;
2251 Elf_Internal_Rela *relocs;
2252 Elf_Internal_Sym *local_syms;
2253 asection **local_sections;
2254 {
2255 struct elf_s390_link_hash_table *htab;
2256 Elf_Internal_Shdr *symtab_hdr;
2257 struct elf_link_hash_entry **sym_hashes;
2258 bfd_vma *local_got_offsets;
2259 Elf_Internal_Rela *rel;
2260 Elf_Internal_Rela *relend;
2261
2262 htab = elf_s390_hash_table (info);
2263 symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr;
2264 sym_hashes = elf_sym_hashes (input_bfd);
2265 local_got_offsets = elf_local_got_offsets (input_bfd);
2266
2267 rel = relocs;
2268 relend = relocs + input_section->reloc_count;
2269 for (; rel < relend; rel++)
2270 {
2271 unsigned int r_type;
2272 reloc_howto_type *howto;
2273 unsigned long r_symndx;
2274 struct elf_link_hash_entry *h;
2275 Elf_Internal_Sym *sym;
2276 asection *sec;
2277 bfd_vma off;
2278 bfd_vma relocation;
2279 bfd_boolean unresolved_reloc;
2280 bfd_reloc_status_type r;
2281 int tls_type;
2282
2283 r_type = ELF64_R_TYPE (rel->r_info);
2284 if (r_type == (int) R_390_GNU_VTINHERIT
2285 || r_type == (int) R_390_GNU_VTENTRY)
2286 continue;
2287 if (r_type >= (int) R_390_max)
2288 {
2289 bfd_set_error (bfd_error_bad_value);
2290 return FALSE;
2291 }
2292
2293 howto = elf_howto_table + r_type;
2294 r_symndx = ELF64_R_SYM (rel->r_info);
2295
2296 h = NULL;
2297 sym = NULL;
2298 sec = NULL;
2299 unresolved_reloc = FALSE;
2300 if (r_symndx < symtab_hdr->sh_info)
2301 {
2302 sym = local_syms + r_symndx;
2303 sec = local_sections[r_symndx];
2304 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2305 }
2306 else
2307 {
2308 bfd_boolean warned ATTRIBUTE_UNUSED;
2309
2310 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2311 r_symndx, symtab_hdr, sym_hashes,
2312 h, sec, relocation,
2313 unresolved_reloc, warned);
2314 }
2315
2316 if (sec != NULL && elf_discarded_section (sec))
2317 {
2318 /* For relocs against symbols from removed linkonce sections,
2319 or sections discarded by a linker script, we just want the
2320 section contents zeroed. Avoid any special processing. */
2321 _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset);
2322 rel->r_info = 0;
2323 rel->r_addend = 0;
2324 continue;
2325 }
2326
2327 if (info->relocatable)
2328 continue;
2329
2330 switch (r_type)
2331 {
2332 case R_390_GOTPLT12:
2333 case R_390_GOTPLT16:
2334 case R_390_GOTPLT20:
2335 case R_390_GOTPLT32:
2336 case R_390_GOTPLT64:
2337 case R_390_GOTPLTENT:
2338 /* There are three cases for a GOTPLT relocation. 1) The
2339 relocation is against the jump slot entry of a plt that
2340 will get emitted to the output file. 2) The relocation
2341 is against the jump slot of a plt entry that has been
2342 removed. elf_s390_adjust_gotplt has created a GOT entry
2343 as replacement. 3) The relocation is against a local symbol.
2344 Cases 2) and 3) are the same as the GOT relocation code
2345 so we just have to test for case 1 and fall through for
2346 the other two. */
2347 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2348 {
2349 bfd_vma plt_index;
2350
2351 /* Calc. index no.
2352 Current offset - size first entry / entry size. */
2353 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2354 PLT_ENTRY_SIZE;
2355
2356 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2357 addr & GOT addr. */
2358 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2359 unresolved_reloc = FALSE;
2360
2361 if (r_type == R_390_GOTPLTENT)
2362 relocation += htab->sgot->output_section->vma;
2363 break;
2364 }
2365 /* Fall through. */
2366
2367 case R_390_GOT12:
2368 case R_390_GOT16:
2369 case R_390_GOT20:
2370 case R_390_GOT32:
2371 case R_390_GOT64:
2372 case R_390_GOTENT:
2373 /* Relocation is to the entry for this symbol in the global
2374 offset table. */
2375 if (htab->sgot == NULL)
2376 abort ();
2377
2378 if (h != NULL)
2379 {
2380 bfd_boolean dyn;
2381
2382 off = h->got.offset;
2383 dyn = htab->elf.dynamic_sections_created;
2384 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2385 || (info->shared
2386 && (info->symbolic
2387 || h->dynindx == -1
2388 || h->forced_local)
2389 && h->def_regular)
2390 || (ELF_ST_VISIBILITY (h->other)
2391 && h->root.type == bfd_link_hash_undefweak))
2392 {
2393 /* This is actually a static link, or it is a
2394 -Bsymbolic link and the symbol is defined
2395 locally, or the symbol was forced to be local
2396 because of a version file. We must initialize
2397 this entry in the global offset table. Since the
2398 offset must always be a multiple of 2, we use the
2399 least significant bit to record whether we have
2400 initialized it already.
2401
2402 When doing a dynamic link, we create a .rel.got
2403 relocation entry to initialize the value. This
2404 is done in the finish_dynamic_symbol routine. */
2405 if ((off & 1) != 0)
2406 off &= ~1;
2407 else
2408 {
2409 bfd_put_64 (output_bfd, relocation,
2410 htab->sgot->contents + off);
2411 h->got.offset |= 1;
2412 }
2413 }
2414 else
2415 unresolved_reloc = FALSE;
2416 }
2417 else
2418 {
2419 if (local_got_offsets == NULL)
2420 abort ();
2421
2422 off = local_got_offsets[r_symndx];
2423
2424 /* The offset must always be a multiple of 8. We use
2425 the least significant bit to record whether we have
2426 already generated the necessary reloc. */
2427 if ((off & 1) != 0)
2428 off &= ~1;
2429 else
2430 {
2431 bfd_put_64 (output_bfd, relocation,
2432 htab->sgot->contents + off);
2433
2434 if (info->shared)
2435 {
2436 asection *s;
2437 Elf_Internal_Rela outrel;
2438 bfd_byte *loc;
2439
2440 s = htab->srelgot;
2441 if (s == NULL)
2442 abort ();
2443
2444 outrel.r_offset = (htab->sgot->output_section->vma
2445 + htab->sgot->output_offset
2446 + off);
2447 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2448 outrel.r_addend = relocation;
2449 loc = s->contents;
2450 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2451 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2452 }
2453
2454 local_got_offsets[r_symndx] |= 1;
2455 }
2456 }
2457
2458 if (off >= (bfd_vma) -2)
2459 abort ();
2460
2461 relocation = htab->sgot->output_offset + off;
2462
2463 /* For @GOTENT the relocation is against the offset between
2464 the instruction and the symbols entry in the GOT and not
2465 between the start of the GOT and the symbols entry. We
2466 add the vma of the GOT to get the correct value. */
2467 if ( r_type == R_390_GOTENT
2468 || r_type == R_390_GOTPLTENT)
2469 relocation += htab->sgot->output_section->vma;
2470
2471 break;
2472
2473 case R_390_GOTOFF16:
2474 case R_390_GOTOFF32:
2475 case R_390_GOTOFF64:
2476 /* Relocation is relative to the start of the global offset
2477 table. */
2478
2479 /* Note that sgot->output_offset is not involved in this
2480 calculation. We always want the start of .got. If we
2481 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2482 permitted by the ABI, we might have to change this
2483 calculation. */
2484 relocation -= htab->sgot->output_section->vma;
2485 break;
2486
2487 case R_390_GOTPC:
2488 case R_390_GOTPCDBL:
2489 /* Use global offset table as symbol value. */
2490 relocation = htab->sgot->output_section->vma;
2491 unresolved_reloc = FALSE;
2492 break;
2493
2494 case R_390_PLT16DBL:
2495 case R_390_PLT32:
2496 case R_390_PLT32DBL:
2497 case R_390_PLT64:
2498 /* Relocation is to the entry for this symbol in the
2499 procedure linkage table. */
2500
2501 /* Resolve a PLT32 reloc against a local symbol directly,
2502 without using the procedure linkage table. */
2503 if (h == NULL)
2504 break;
2505
2506 if (h->plt.offset == (bfd_vma) -1
2507 || htab->splt == NULL)
2508 {
2509 /* We didn't make a PLT entry for this symbol. This
2510 happens when statically linking PIC code, or when
2511 using -Bsymbolic. */
2512 break;
2513 }
2514
2515 relocation = (htab->splt->output_section->vma
2516 + htab->splt->output_offset
2517 + h->plt.offset);
2518 unresolved_reloc = FALSE;
2519 break;
2520
2521 case R_390_PLTOFF16:
2522 case R_390_PLTOFF32:
2523 case R_390_PLTOFF64:
2524 /* Relocation is to the entry for this symbol in the
2525 procedure linkage table relative to the start of the GOT. */
2526
2527 /* For local symbols or if we didn't make a PLT entry for
2528 this symbol resolve the symbol directly. */
2529 if ( h == NULL
2530 || h->plt.offset == (bfd_vma) -1
2531 || htab->splt == NULL)
2532 {
2533 relocation -= htab->sgot->output_section->vma;
2534 break;
2535 }
2536
2537 relocation = (htab->splt->output_section->vma
2538 + htab->splt->output_offset
2539 + h->plt.offset
2540 - htab->sgot->output_section->vma);
2541 unresolved_reloc = FALSE;
2542 break;
2543
2544 case R_390_8:
2545 case R_390_16:
2546 case R_390_32:
2547 case R_390_64:
2548 case R_390_PC16:
2549 case R_390_PC16DBL:
2550 case R_390_PC32:
2551 case R_390_PC32DBL:
2552 case R_390_PC64:
2553 if ((input_section->flags & SEC_ALLOC) == 0)
2554 break;
2555
2556 if ((info->shared
2557 && (h == NULL
2558 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2559 || h->root.type != bfd_link_hash_undefweak)
2560 && ((r_type != R_390_PC16
2561 && r_type != R_390_PC16DBL
2562 && r_type != R_390_PC32
2563 && r_type != R_390_PC32DBL
2564 && r_type != R_390_PC64)
2565 || (h != NULL
2566 && !SYMBOL_REFERENCES_LOCAL (info, h))))
2567 || (ELIMINATE_COPY_RELOCS
2568 && !info->shared
2569 && h != NULL
2570 && h->dynindx != -1
2571 && !h->non_got_ref
2572 && ((h->def_dynamic
2573 && !h->def_regular)
2574 || h->root.type == bfd_link_hash_undefweak
2575 || h->root.type == bfd_link_hash_undefined)))
2576 {
2577 Elf_Internal_Rela outrel;
2578 bfd_boolean skip, relocate;
2579 asection *sreloc;
2580 bfd_byte *loc;
2581
2582 /* When generating a shared object, these relocations
2583 are copied into the output file to be resolved at run
2584 time. */
2585 skip = FALSE;
2586 relocate = FALSE;
2587
2588 outrel.r_offset =
2589 _bfd_elf_section_offset (output_bfd, info, input_section,
2590 rel->r_offset);
2591 if (outrel.r_offset == (bfd_vma) -1)
2592 skip = TRUE;
2593 else if (outrel.r_offset == (bfd_vma) -2)
2594 skip = TRUE, relocate = TRUE;
2595
2596 outrel.r_offset += (input_section->output_section->vma
2597 + input_section->output_offset);
2598
2599 if (skip)
2600 memset (&outrel, 0, sizeof outrel);
2601 else if (h != NULL
2602 && h->dynindx != -1
2603 && (r_type == R_390_PC16
2604 || r_type == R_390_PC16DBL
2605 || r_type == R_390_PC32
2606 || r_type == R_390_PC32DBL
2607 || r_type == R_390_PC64
2608 || !info->shared
2609 || !info->symbolic
2610 || !h->def_regular))
2611 {
2612 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2613 outrel.r_addend = rel->r_addend;
2614 }
2615 else
2616 {
2617 /* This symbol is local, or marked to become local. */
2618 outrel.r_addend = relocation + rel->r_addend;
2619 if (r_type == R_390_64)
2620 {
2621 relocate = TRUE;
2622 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2623 }
2624 else
2625 {
2626 long sindx;
2627
2628 if (bfd_is_abs_section (sec))
2629 sindx = 0;
2630 else if (sec == NULL || sec->owner == NULL)
2631 {
2632 bfd_set_error(bfd_error_bad_value);
2633 return FALSE;
2634 }
2635 else
2636 {
2637 asection *osec;
2638
2639 osec = sec->output_section;
2640 sindx = elf_section_data (osec)->dynindx;
2641
2642 if (sindx == 0)
2643 {
2644 osec = htab->elf.text_index_section;
2645 sindx = elf_section_data (osec)->dynindx;
2646 }
2647 BFD_ASSERT (sindx != 0);
2648
2649 /* We are turning this relocation into one
2650 against a section symbol, so subtract out
2651 the output section's address but not the
2652 offset of the input section in the output
2653 section. */
2654 outrel.r_addend -= osec->vma;
2655 }
2656 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2657 }
2658 }
2659
2660 sreloc = elf_section_data (input_section)->sreloc;
2661 if (sreloc == NULL)
2662 abort ();
2663
2664 loc = sreloc->contents;
2665 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2666 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2667
2668 /* If this reloc is against an external symbol, we do
2669 not want to fiddle with the addend. Otherwise, we
2670 need to include the symbol value so that it becomes
2671 an addend for the dynamic reloc. */
2672 if (! relocate)
2673 continue;
2674 }
2675
2676 break;
2677
2678 /* Relocations for tls literal pool entries. */
2679 case R_390_TLS_IE64:
2680 if (info->shared)
2681 {
2682 Elf_Internal_Rela outrel;
2683 asection *sreloc;
2684 bfd_byte *loc;
2685
2686 outrel.r_offset = rel->r_offset
2687 + input_section->output_section->vma
2688 + input_section->output_offset;
2689 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2690 sreloc = elf_section_data (input_section)->sreloc;
2691 if (sreloc == NULL)
2692 abort ();
2693 loc = sreloc->contents;
2694 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2695 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2696 }
2697 /* Fall through. */
2698
2699 case R_390_TLS_GD64:
2700 case R_390_TLS_GOTIE64:
2701 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2702 tls_type = GOT_UNKNOWN;
2703 if (h == NULL && local_got_offsets)
2704 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2705 else if (h != NULL)
2706 {
2707 tls_type = elf_s390_hash_entry(h)->tls_type;
2708 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2709 r_type = R_390_TLS_LE64;
2710 }
2711 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2712 r_type = R_390_TLS_IE64;
2713
2714 if (r_type == R_390_TLS_LE64)
2715 {
2716 /* This relocation gets optimized away by the local exec
2717 access optimization. */
2718 BFD_ASSERT (! unresolved_reloc);
2719 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2720 contents + rel->r_offset);
2721 continue;
2722 }
2723
2724 if (htab->sgot == NULL)
2725 abort ();
2726
2727 if (h != NULL)
2728 off = h->got.offset;
2729 else
2730 {
2731 if (local_got_offsets == NULL)
2732 abort ();
2733
2734 off = local_got_offsets[r_symndx];
2735 }
2736
2737 emit_tls_relocs:
2738
2739 if ((off & 1) != 0)
2740 off &= ~1;
2741 else
2742 {
2743 Elf_Internal_Rela outrel;
2744 bfd_byte *loc;
2745 int dr_type, indx;
2746
2747 if (htab->srelgot == NULL)
2748 abort ();
2749
2750 outrel.r_offset = (htab->sgot->output_section->vma
2751 + htab->sgot->output_offset + off);
2752
2753 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2754 if (r_type == R_390_TLS_GD64)
2755 dr_type = R_390_TLS_DTPMOD;
2756 else
2757 dr_type = R_390_TLS_TPOFF;
2758 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2759 outrel.r_addend = relocation - dtpoff_base (info);
2760 else
2761 outrel.r_addend = 0;
2762 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2763 loc = htab->srelgot->contents;
2764 loc += htab->srelgot->reloc_count++
2765 * sizeof (Elf64_External_Rela);
2766 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2767
2768 if (r_type == R_390_TLS_GD64)
2769 {
2770 if (indx == 0)
2771 {
2772 BFD_ASSERT (! unresolved_reloc);
2773 bfd_put_64 (output_bfd,
2774 relocation - dtpoff_base (info),
2775 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2776 }
2777 else
2778 {
2779 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2780 outrel.r_offset += GOT_ENTRY_SIZE;
2781 outrel.r_addend = 0;
2782 htab->srelgot->reloc_count++;
2783 loc += sizeof (Elf64_External_Rela);
2784 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2785 }
2786 }
2787
2788 if (h != NULL)
2789 h->got.offset |= 1;
2790 else
2791 local_got_offsets[r_symndx] |= 1;
2792 }
2793
2794 if (off >= (bfd_vma) -2)
2795 abort ();
2796 if (r_type == ELF64_R_TYPE (rel->r_info))
2797 {
2798 relocation = htab->sgot->output_offset + off;
2799 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2800 relocation += htab->sgot->output_section->vma;
2801 unresolved_reloc = FALSE;
2802 }
2803 else
2804 {
2805 bfd_put_64 (output_bfd, htab->sgot->output_offset + off,
2806 contents + rel->r_offset);
2807 continue;
2808 }
2809 break;
2810
2811 case R_390_TLS_GOTIE12:
2812 case R_390_TLS_GOTIE20:
2813 case R_390_TLS_IEENT:
2814 if (h == NULL)
2815 {
2816 if (local_got_offsets == NULL)
2817 abort();
2818 off = local_got_offsets[r_symndx];
2819 if (info->shared)
2820 goto emit_tls_relocs;
2821 }
2822 else
2823 {
2824 off = h->got.offset;
2825 tls_type = elf_s390_hash_entry(h)->tls_type;
2826 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2827 goto emit_tls_relocs;
2828 }
2829
2830 if (htab->sgot == NULL)
2831 abort ();
2832
2833 BFD_ASSERT (! unresolved_reloc);
2834 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2835 htab->sgot->contents + off);
2836 relocation = htab->sgot->output_offset + off;
2837 if (r_type == R_390_TLS_IEENT)
2838 relocation += htab->sgot->output_section->vma;
2839 unresolved_reloc = FALSE;
2840 break;
2841
2842 case R_390_TLS_LDM64:
2843 if (! info->shared)
2844 /* The literal pool entry this relocation refers to gets ignored
2845 by the optimized code of the local exec model. Do nothing
2846 and the value will turn out zero. */
2847 continue;
2848
2849 if (htab->sgot == NULL)
2850 abort ();
2851
2852 off = htab->tls_ldm_got.offset;
2853 if (off & 1)
2854 off &= ~1;
2855 else
2856 {
2857 Elf_Internal_Rela outrel;
2858 bfd_byte *loc;
2859
2860 if (htab->srelgot == NULL)
2861 abort ();
2862
2863 outrel.r_offset = (htab->sgot->output_section->vma
2864 + htab->sgot->output_offset + off);
2865
2866 bfd_put_64 (output_bfd, 0,
2867 htab->sgot->contents + off + GOT_ENTRY_SIZE);
2868 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2869 outrel.r_addend = 0;
2870 loc = htab->srelgot->contents;
2871 loc += htab->srelgot->reloc_count++
2872 * sizeof (Elf64_External_Rela);
2873 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2874 htab->tls_ldm_got.offset |= 1;
2875 }
2876 relocation = htab->sgot->output_offset + off;
2877 unresolved_reloc = FALSE;
2878 break;
2879
2880 case R_390_TLS_LE64:
2881 if (info->shared)
2882 {
2883 /* Linking a shared library with non-fpic code requires
2884 a R_390_TLS_TPOFF relocation. */
2885 Elf_Internal_Rela outrel;
2886 asection *sreloc;
2887 bfd_byte *loc;
2888 int indx;
2889
2890 outrel.r_offset = rel->r_offset
2891 + input_section->output_section->vma
2892 + input_section->output_offset;
2893 if (h != NULL && h->dynindx != -1)
2894 indx = h->dynindx;
2895 else
2896 indx = 0;
2897 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2898 if (indx == 0)
2899 outrel.r_addend = relocation - dtpoff_base (info);
2900 else
2901 outrel.r_addend = 0;
2902 sreloc = elf_section_data (input_section)->sreloc;
2903 if (sreloc == NULL)
2904 abort ();
2905 loc = sreloc->contents;
2906 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2907 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2908 }
2909 else
2910 {
2911 BFD_ASSERT (! unresolved_reloc);
2912 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2913 contents + rel->r_offset);
2914 }
2915 continue;
2916
2917 case R_390_TLS_LDO64:
2918 if (info->shared)
2919 relocation -= dtpoff_base (info);
2920 else
2921 /* When converting LDO to LE, we must negate. */
2922 relocation = -tpoff (info, relocation);
2923 break;
2924
2925 /* Relocations for tls instructions. */
2926 case R_390_TLS_LOAD:
2927 case R_390_TLS_GDCALL:
2928 case R_390_TLS_LDCALL:
2929 tls_type = GOT_UNKNOWN;
2930 if (h == NULL && local_got_offsets)
2931 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2932 else if (h != NULL)
2933 tls_type = elf_s390_hash_entry(h)->tls_type;
2934
2935 if (tls_type == GOT_TLS_GD)
2936 continue;
2937
2938 if (r_type == R_390_TLS_LOAD)
2939 {
2940 if (!info->shared && (h == NULL || h->dynindx == -1))
2941 {
2942 /* IE->LE transition. Four valid cases:
2943 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2944 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2945 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2946 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2947 unsigned int insn0, insn1, ry;
2948
2949 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2950 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2951 if (insn1 != 0x0004)
2952 invalid_tls_insn (input_bfd, input_section, rel);
2953 ry = 0;
2954 if ((insn0 & 0xff00f000) == 0xe3000000)
2955 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2956 ry = (insn0 & 0x000f0000);
2957 else if ((insn0 & 0xff0f0000) == 0xe3000000)
2958 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2959 ry = (insn0 & 0x0000f000) << 4;
2960 else if ((insn0 & 0xff00f000) == 0xe300c000)
2961 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2962 ry = (insn0 & 0x000f0000);
2963 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
2964 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2965 ry = (insn0 & 0x0000f000) << 4;
2966 else
2967 invalid_tls_insn (input_bfd, input_section, rel);
2968 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
2969 insn1 = 0x000d;
2970 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2971 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2972 }
2973 }
2974 else if (r_type == R_390_TLS_GDCALL)
2975 {
2976 unsigned int insn0, insn1;
2977
2978 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
2979 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
2980 if ((insn0 & 0xffff0000) != 0xc0e50000)
2981 invalid_tls_insn (input_bfd, input_section, rel);
2982 if (!info->shared && (h == NULL || h->dynindx == -1))
2983 {
2984 /* GD->LE transition.
2985 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2986 insn0 = 0xc0040000;
2987 insn1 = 0x0000;
2988 }
2989 else
2990 {
2991 /* GD->IE transition.
2992 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2993 insn0 = 0xe322c000;
2994 insn1 = 0x0004;
2995 }
2996 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
2997 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
2998 }
2999 else if (r_type == R_390_TLS_LDCALL)
3000 {
3001 if (!info->shared)
3002 {
3003 unsigned int insn0, insn1;
3004
3005 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3006 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3007 if ((insn0 & 0xffff0000) != 0xc0e50000)
3008 invalid_tls_insn (input_bfd, input_section, rel);
3009 /* LD->LE transition.
3010 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3011 insn0 = 0xc0040000;
3012 insn1 = 0x0000;
3013 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3014 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3015 }
3016 }
3017 continue;
3018
3019 default:
3020 break;
3021 }
3022
3023 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3024 because such sections are not SEC_ALLOC and thus ld.so will
3025 not process them. */
3026 if (unresolved_reloc
3027 && !((input_section->flags & SEC_DEBUGGING) != 0
3028 && h->def_dynamic))
3029 (*_bfd_error_handler)
3030 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3031 input_bfd,
3032 input_section,
3033 (long) rel->r_offset,
3034 howto->name,
3035 h->root.root.string);
3036
3037 if (r_type == R_390_20
3038 || r_type == R_390_GOT20
3039 || r_type == R_390_GOTPLT20
3040 || r_type == R_390_TLS_GOTIE20)
3041 {
3042 relocation += rel->r_addend;
3043 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3044 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3045 contents, rel->r_offset,
3046 relocation, 0);
3047 }
3048 else
3049 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3050 contents, rel->r_offset,
3051 relocation, rel->r_addend);
3052
3053 if (r != bfd_reloc_ok)
3054 {
3055 const char *name;
3056
3057 if (h != NULL)
3058 name = h->root.root.string;
3059 else
3060 {
3061 name = bfd_elf_string_from_elf_section (input_bfd,
3062 symtab_hdr->sh_link,
3063 sym->st_name);
3064 if (name == NULL)
3065 return FALSE;
3066 if (*name == '\0')
3067 name = bfd_section_name (input_bfd, sec);
3068 }
3069
3070 if (r == bfd_reloc_overflow)
3071 {
3072
3073 if (! ((*info->callbacks->reloc_overflow)
3074 (info, (h ? &h->root : NULL), name, howto->name,
3075 (bfd_vma) 0, input_bfd, input_section,
3076 rel->r_offset)))
3077 return FALSE;
3078 }
3079 else
3080 {
3081 (*_bfd_error_handler)
3082 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3083 input_bfd, input_section,
3084 (long) rel->r_offset, name, (int) r);
3085 return FALSE;
3086 }
3087 }
3088 }
3089
3090 return TRUE;
3091 }
3092
3093 /* Finish up dynamic symbol handling. We set the contents of various
3094 dynamic sections here. */
3095
3096 static bfd_boolean
3097 elf_s390_finish_dynamic_symbol (output_bfd, info, h, sym)
3098 bfd *output_bfd;
3099 struct bfd_link_info *info;
3100 struct elf_link_hash_entry *h;
3101 Elf_Internal_Sym *sym;
3102 {
3103 struct elf_s390_link_hash_table *htab;
3104
3105 htab = elf_s390_hash_table (info);
3106
3107 if (h->plt.offset != (bfd_vma) -1)
3108 {
3109 bfd_vma plt_index;
3110 bfd_vma got_offset;
3111 Elf_Internal_Rela rela;
3112 bfd_byte *loc;
3113
3114 /* This symbol has an entry in the procedure linkage table. Set
3115 it up. */
3116
3117 if (h->dynindx == -1
3118 || htab->splt == NULL
3119 || htab->sgotplt == NULL
3120 || htab->srelplt == NULL)
3121 abort ();
3122
3123 /* Calc. index no.
3124 Current offset - size first entry / entry size. */
3125 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3126
3127 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3128 addr & GOT addr. */
3129 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3130
3131 /* Fill in the blueprint of a PLT. */
3132 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD0,
3133 htab->splt->contents + h->plt.offset);
3134 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD1,
3135 htab->splt->contents + h->plt.offset + 4);
3136 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD2,
3137 htab->splt->contents + h->plt.offset + 8);
3138 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD3,
3139 htab->splt->contents + h->plt.offset + 12);
3140 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD4,
3141 htab->splt->contents + h->plt.offset + 16);
3142 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD5,
3143 htab->splt->contents + h->plt.offset + 20);
3144 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD6,
3145 htab->splt->contents + h->plt.offset + 24);
3146 bfd_put_32 (output_bfd, (bfd_vma) PLT_ENTRY_WORD7,
3147 htab->splt->contents + h->plt.offset + 28);
3148 /* Fixup the relative address to the GOT entry */
3149 bfd_put_32 (output_bfd,
3150 (htab->sgotplt->output_section->vma +
3151 htab->sgotplt->output_offset + got_offset
3152 - (htab->splt->output_section->vma + h->plt.offset))/2,
3153 htab->splt->contents + h->plt.offset + 2);
3154 /* Fixup the relative branch to PLT 0 */
3155 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3156 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3157 htab->splt->contents + h->plt.offset + 24);
3158 /* Fixup offset into symbol table */
3159 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3160 htab->splt->contents + h->plt.offset + 28);
3161
3162 /* Fill in the entry in the global offset table.
3163 Points to instruction after GOT offset. */
3164 bfd_put_64 (output_bfd,
3165 (htab->splt->output_section->vma
3166 + htab->splt->output_offset
3167 + h->plt.offset
3168 + 14),
3169 htab->sgotplt->contents + got_offset);
3170
3171 /* Fill in the entry in the .rela.plt section. */
3172 rela.r_offset = (htab->sgotplt->output_section->vma
3173 + htab->sgotplt->output_offset
3174 + got_offset);
3175 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3176 rela.r_addend = 0;
3177 loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela);
3178 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3179
3180 if (!h->def_regular)
3181 {
3182 /* Mark the symbol as undefined, rather than as defined in
3183 the .plt section. Leave the value alone. This is a clue
3184 for the dynamic linker, to make function pointer
3185 comparisons work between an application and shared
3186 library. */
3187 sym->st_shndx = SHN_UNDEF;
3188 }
3189 }
3190
3191 if (h->got.offset != (bfd_vma) -1
3192 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3193 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3194 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3195 {
3196 Elf_Internal_Rela rela;
3197 bfd_byte *loc;
3198
3199 /* This symbol has an entry in the global offset table. Set it
3200 up. */
3201 if (htab->sgot == NULL || htab->srelgot == NULL)
3202 abort ();
3203
3204 rela.r_offset = (htab->sgot->output_section->vma
3205 + htab->sgot->output_offset
3206 + (h->got.offset &~ (bfd_vma) 1));
3207
3208 /* If this is a static link, or it is a -Bsymbolic link and the
3209 symbol is defined locally or was forced to be local because
3210 of a version file, we just want to emit a RELATIVE reloc.
3211 The entry in the global offset table will already have been
3212 initialized in the relocate_section function. */
3213 if (info->shared
3214 && (info->symbolic
3215 || h->dynindx == -1
3216 || h->forced_local)
3217 && h->def_regular)
3218 {
3219 BFD_ASSERT((h->got.offset & 1) != 0);
3220 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3221 rela.r_addend = (h->root.u.def.value
3222 + h->root.u.def.section->output_section->vma
3223 + h->root.u.def.section->output_offset);
3224 }
3225 else
3226 {
3227 BFD_ASSERT((h->got.offset & 1) == 0);
3228 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgot->contents + h->got.offset);
3229 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3230 rela.r_addend = 0;
3231 }
3232
3233 loc = htab->srelgot->contents;
3234 loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3235 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3236 }
3237
3238 if (h->needs_copy)
3239 {
3240 Elf_Internal_Rela rela;
3241 bfd_byte *loc;
3242
3243 /* This symbols needs a copy reloc. Set it up. */
3244
3245 if (h->dynindx == -1
3246 || (h->root.type != bfd_link_hash_defined
3247 && h->root.type != bfd_link_hash_defweak)
3248 || htab->srelbss == NULL)
3249 abort ();
3250
3251 rela.r_offset = (h->root.u.def.value
3252 + h->root.u.def.section->output_section->vma
3253 + h->root.u.def.section->output_offset);
3254 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3255 rela.r_addend = 0;
3256 loc = htab->srelbss->contents;
3257 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3258 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3259 }
3260
3261 /* Mark some specially defined symbols as absolute. */
3262 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3263 || h == htab->elf.hgot
3264 || h == htab->elf.hplt)
3265 sym->st_shndx = SHN_ABS;
3266
3267 return TRUE;
3268 }
3269
3270 /* Used to decide how to sort relocs in an optimal manner for the
3271 dynamic linker, before writing them out. */
3272
3273 static enum elf_reloc_type_class
3274 elf_s390_reloc_type_class (rela)
3275 const Elf_Internal_Rela *rela;
3276 {
3277 switch ((int) ELF64_R_TYPE (rela->r_info))
3278 {
3279 case R_390_RELATIVE:
3280 return reloc_class_relative;
3281 case R_390_JMP_SLOT:
3282 return reloc_class_plt;
3283 case R_390_COPY:
3284 return reloc_class_copy;
3285 default:
3286 return reloc_class_normal;
3287 }
3288 }
3289
3290 /* Finish up the dynamic sections. */
3291
3292 static bfd_boolean
3293 elf_s390_finish_dynamic_sections (output_bfd, info)
3294 bfd *output_bfd;
3295 struct bfd_link_info *info;
3296 {
3297 struct elf_s390_link_hash_table *htab;
3298 bfd *dynobj;
3299 asection *sdyn;
3300
3301 htab = elf_s390_hash_table (info);
3302 dynobj = htab->elf.dynobj;
3303 sdyn = bfd_get_section_by_name (dynobj, ".dynamic");
3304
3305 if (htab->elf.dynamic_sections_created)
3306 {
3307 Elf64_External_Dyn *dyncon, *dynconend;
3308
3309 if (sdyn == NULL || htab->sgot == NULL)
3310 abort ();
3311
3312 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3313 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3314 for (; dyncon < dynconend; dyncon++)
3315 {
3316 Elf_Internal_Dyn dyn;
3317 asection *s;
3318
3319 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3320
3321 switch (dyn.d_tag)
3322 {
3323 default:
3324 continue;
3325
3326 case DT_PLTGOT:
3327 dyn.d_un.d_ptr = htab->sgot->output_section->vma;
3328 break;
3329
3330 case DT_JMPREL:
3331 dyn.d_un.d_ptr = htab->srelplt->output_section->vma;
3332 break;
3333
3334 case DT_PLTRELSZ:
3335 s = htab->srelplt->output_section;
3336 dyn.d_un.d_val = s->size;
3337 break;
3338
3339 case DT_RELASZ:
3340 /* The procedure linkage table relocs (DT_JMPREL) should
3341 not be included in the overall relocs (DT_RELA).
3342 Therefore, we override the DT_RELASZ entry here to
3343 make it not include the JMPREL relocs. Since the
3344 linker script arranges for .rela.plt to follow all
3345 other relocation sections, we don't have to worry
3346 about changing the DT_RELA entry. */
3347 s = htab->srelplt->output_section;
3348 dyn.d_un.d_val -= s->size;
3349 break;
3350 }
3351
3352 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3353 }
3354
3355 /* Fill in the special first entry in the procedure linkage table. */
3356 if (htab->splt && htab->splt->size > 0)
3357 {
3358 /* fill in blueprint for plt 0 entry */
3359 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD0,
3360 htab->splt->contents );
3361 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD1,
3362 htab->splt->contents +4 );
3363 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD3,
3364 htab->splt->contents +12 );
3365 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD4,
3366 htab->splt->contents +16 );
3367 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD5,
3368 htab->splt->contents +20 );
3369 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD6,
3370 htab->splt->contents + 24);
3371 bfd_put_32 (output_bfd, (bfd_vma) PLT_FIRST_ENTRY_WORD7,
3372 htab->splt->contents + 28 );
3373 /* Fixup relative address to start of GOT */
3374 bfd_put_32 (output_bfd,
3375 (htab->sgotplt->output_section->vma +
3376 htab->sgotplt->output_offset
3377 - htab->splt->output_section->vma - 6)/2,
3378 htab->splt->contents + 8);
3379 }
3380 elf_section_data (htab->splt->output_section)
3381 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3382 }
3383
3384 if (htab->sgotplt)
3385 {
3386 /* Fill in the first three entries in the global offset table. */
3387 if (htab->sgotplt->size > 0)
3388 {
3389 bfd_put_64 (output_bfd,
3390 (sdyn == NULL ? (bfd_vma) 0
3391 : sdyn->output_section->vma + sdyn->output_offset),
3392 htab->sgotplt->contents);
3393 /* One entry for shared object struct ptr. */
3394 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 8);
3395 /* One entry for _dl_runtime_resolve. */
3396 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + 12);
3397 }
3398
3399 elf_section_data (htab->sgot->output_section)
3400 ->this_hdr.sh_entsize = 8;
3401 }
3402 return TRUE;
3403 }
3404
3405 /* Return address for Ith PLT stub in section PLT, for relocation REL
3406 or (bfd_vma) -1 if it should not be included. */
3407
3408 static bfd_vma
3409 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3410 const arelent *rel ATTRIBUTE_UNUSED)
3411 {
3412 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3413 }
3414
3415
3416 /* Why was the hash table entry size definition changed from
3417 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3418 this is the only reason for the s390_elf64_size_info structure. */
3419
3420 const struct elf_size_info s390_elf64_size_info =
3421 {
3422 sizeof (Elf64_External_Ehdr),
3423 sizeof (Elf64_External_Phdr),
3424 sizeof (Elf64_External_Shdr),
3425 sizeof (Elf64_External_Rel),
3426 sizeof (Elf64_External_Rela),
3427 sizeof (Elf64_External_Sym),
3428 sizeof (Elf64_External_Dyn),
3429 sizeof (Elf_External_Note),
3430 8, /* hash-table entry size. */
3431 1, /* internal relocations per external relocations. */
3432 64, /* arch_size. */
3433 3, /* log_file_align. */
3434 ELFCLASS64, EV_CURRENT,
3435 bfd_elf64_write_out_phdrs,
3436 bfd_elf64_write_shdrs_and_ehdr,
3437 bfd_elf64_write_relocs,
3438 bfd_elf64_swap_symbol_in,
3439 bfd_elf64_swap_symbol_out,
3440 bfd_elf64_slurp_reloc_table,
3441 bfd_elf64_slurp_symbol_table,
3442 bfd_elf64_swap_dyn_in,
3443 bfd_elf64_swap_dyn_out,
3444 bfd_elf64_swap_reloc_in,
3445 bfd_elf64_swap_reloc_out,
3446 bfd_elf64_swap_reloca_in,
3447 bfd_elf64_swap_reloca_out
3448 };
3449
3450 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3451 #define TARGET_BIG_NAME "elf64-s390"
3452 #define ELF_ARCH bfd_arch_s390
3453 #define ELF_MACHINE_CODE EM_S390
3454 #define ELF_MACHINE_ALT1 EM_S390_OLD
3455 #define ELF_MAXPAGESIZE 0x1000
3456
3457 #define elf_backend_size_info s390_elf64_size_info
3458
3459 #define elf_backend_can_gc_sections 1
3460 #define elf_backend_can_refcount 1
3461 #define elf_backend_want_got_plt 1
3462 #define elf_backend_plt_readonly 1
3463 #define elf_backend_want_plt_sym 0
3464 #define elf_backend_got_header_size 24
3465 #define elf_backend_rela_normal 1
3466
3467 #define elf_info_to_howto elf_s390_info_to_howto
3468
3469 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3470 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3471 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3472 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3473
3474 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3475 #define elf_backend_check_relocs elf_s390_check_relocs
3476 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3477 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3478 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3479 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3480 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3481 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3482 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3483 #define elf_backend_relocate_section elf_s390_relocate_section
3484 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3485 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3486 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3487 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3488
3489 #define bfd_elf64_mkobject elf_s390_mkobject
3490 #define elf_backend_object_p elf_s390_object_p
3491
3492 #include "elf64-target.h"
A mirror of the official binutils-gdb repository