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PR ld/15323
[deliverable/binutils-gdb.git] / bfd / elf32-s390.c
1 /* IBM S/390-specific support for 32-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2011, 2012 Free Software Foundation, Inc.
4 Contributed by Carl B. Pedersen and Martin Schwidefsky.
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/s390.h"
29
30 static bfd_reloc_status_type
31 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
32 asection *, bfd *, char **);
33 static bfd_reloc_status_type
34 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
35 asection *, bfd *, char **);
36
37 /* The relocation "howto" table. */
38
39 static reloc_howto_type elf_howto_table[] =
40 {
41 HOWTO (R_390_NONE, /* type */
42 0, /* rightshift */
43 0, /* size (0 = byte, 1 = short, 2 = long) */
44 0, /* bitsize */
45 FALSE, /* pc_relative */
46 0, /* bitpos */
47 complain_overflow_dont, /* complain_on_overflow */
48 bfd_elf_generic_reloc, /* special_function */
49 "R_390_NONE", /* name */
50 FALSE, /* partial_inplace */
51 0, /* src_mask */
52 0, /* dst_mask */
53 FALSE), /* pcrel_offset */
54
55 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
56 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
57 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
58 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
59 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
61 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
62 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
63 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
65 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
67 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
69 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
71 HOWTO(R_390_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,0xffffffff, FALSE),
75 HOWTO(R_390_JMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,0xffffffff, FALSE),
77 HOWTO(R_390_RELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,0xffffffff, FALSE),
79 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,0xffffffff, FALSE),
81 HOWTO(R_390_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,0xffffffff, TRUE),
83 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
85 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
87 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
89 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
93 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
95 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,0xffffffff, TRUE),
97 EMPTY_HOWTO (R_390_64), /* Empty entry for R_390_64. */
98 EMPTY_HOWTO (R_390_PC64), /* Empty entry for R_390_PC64. */
99 EMPTY_HOWTO (R_390_GOT64), /* Empty entry for R_390_GOT64. */
100 EMPTY_HOWTO (R_390_PLT64), /* Empty entry for R_390_PLT64. */
101 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,0xffffffff, TRUE),
103 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
105 EMPTY_HOWTO (R_390_GOTOFF64), /* Empty entry for R_390_GOTOFF64. */
106 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
107 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
108 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
110 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
112 EMPTY_HOWTO (R_390_GOTPLT64), /* Empty entry for R_390_GOTPLT64. */
113 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,0xffffffff, TRUE),
115 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
116 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
117 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
119 EMPTY_HOWTO (R_390_PLTOFF64), /* Empty entry for R_390_PLTOFF64. */
120 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
121 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
122 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
123 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
124 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
125 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
126 HOWTO(R_390_TLS_GD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_TLS_GD32", FALSE, 0, 0xffffffff, FALSE),
128 EMPTY_HOWTO (R_390_TLS_GD64), /* Empty entry for R_390_TLS_GD64. */
129 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
130 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
131 HOWTO(R_390_TLS_GOTIE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
132 bfd_elf_generic_reloc, "R_390_TLS_GOTIE32", FALSE, 0, 0xffffffff, FALSE),
133 EMPTY_HOWTO (R_390_TLS_GOTIE64), /* Empty entry for R_390_TLS_GOTIE64. */
134 HOWTO(R_390_TLS_LDM32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
135 bfd_elf_generic_reloc, "R_390_TLS_LDM32", FALSE, 0, 0xffffffff, FALSE),
136 EMPTY_HOWTO (R_390_TLS_LDM64), /* Empty entry for R_390_TLS_LDM64. */
137 HOWTO(R_390_TLS_IE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_IE32", FALSE, 0, 0xffffffff, FALSE),
139 EMPTY_HOWTO (R_390_TLS_IE64), /* Empty entry for R_390_TLS_IE64. */
140 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
141 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, 0xffffffff, TRUE),
142 HOWTO(R_390_TLS_LE32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_LE32", FALSE, 0, 0xffffffff, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LE64), /* Empty entry for R_390_TLS_LE64. */
145 HOWTO(R_390_TLS_LDO32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDO32", FALSE, 0, 0xffffffff, FALSE),
147 EMPTY_HOWTO (R_390_TLS_LDO64), /* Empty entry for R_390_TLS_LDO64. */
148 HOWTO(R_390_TLS_DTPMOD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, 0xffffffff, FALSE),
150 HOWTO(R_390_TLS_DTPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, 0xffffffff, FALSE),
152 HOWTO(R_390_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
153 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, 0xffffffff, FALSE),
154 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
155 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
156 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
157 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
158 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
159 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
160 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
161 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
162 HOWTO(R_390_IRELATIVE, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, 0xffffffff, FALSE),
164 };
165
166 /* GNU extension to record C++ vtable hierarchy. */
167 static reloc_howto_type elf32_s390_vtinherit_howto =
168 HOWTO (R_390_GNU_VTINHERIT, 0,2,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
169 static reloc_howto_type elf32_s390_vtentry_howto =
170 HOWTO (R_390_GNU_VTENTRY, 0,2,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
171
172 static reloc_howto_type *
173 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
174 bfd_reloc_code_real_type code)
175 {
176 switch (code)
177 {
178 case BFD_RELOC_NONE:
179 return &elf_howto_table[(int) R_390_NONE];
180 case BFD_RELOC_8:
181 return &elf_howto_table[(int) R_390_8];
182 case BFD_RELOC_390_12:
183 return &elf_howto_table[(int) R_390_12];
184 case BFD_RELOC_16:
185 return &elf_howto_table[(int) R_390_16];
186 case BFD_RELOC_32:
187 return &elf_howto_table[(int) R_390_32];
188 case BFD_RELOC_CTOR:
189 return &elf_howto_table[(int) R_390_32];
190 case BFD_RELOC_32_PCREL:
191 return &elf_howto_table[(int) R_390_PC32];
192 case BFD_RELOC_390_GOT12:
193 return &elf_howto_table[(int) R_390_GOT12];
194 case BFD_RELOC_32_GOT_PCREL:
195 return &elf_howto_table[(int) R_390_GOT32];
196 case BFD_RELOC_390_PLT32:
197 return &elf_howto_table[(int) R_390_PLT32];
198 case BFD_RELOC_390_COPY:
199 return &elf_howto_table[(int) R_390_COPY];
200 case BFD_RELOC_390_GLOB_DAT:
201 return &elf_howto_table[(int) R_390_GLOB_DAT];
202 case BFD_RELOC_390_JMP_SLOT:
203 return &elf_howto_table[(int) R_390_JMP_SLOT];
204 case BFD_RELOC_390_RELATIVE:
205 return &elf_howto_table[(int) R_390_RELATIVE];
206 case BFD_RELOC_32_GOTOFF:
207 return &elf_howto_table[(int) R_390_GOTOFF32];
208 case BFD_RELOC_390_GOTPC:
209 return &elf_howto_table[(int) R_390_GOTPC];
210 case BFD_RELOC_390_GOT16:
211 return &elf_howto_table[(int) R_390_GOT16];
212 case BFD_RELOC_16_PCREL:
213 return &elf_howto_table[(int) R_390_PC16];
214 case BFD_RELOC_390_PC16DBL:
215 return &elf_howto_table[(int) R_390_PC16DBL];
216 case BFD_RELOC_390_PLT16DBL:
217 return &elf_howto_table[(int) R_390_PLT16DBL];
218 case BFD_RELOC_390_PC32DBL:
219 return &elf_howto_table[(int) R_390_PC32DBL];
220 case BFD_RELOC_390_PLT32DBL:
221 return &elf_howto_table[(int) R_390_PLT32DBL];
222 case BFD_RELOC_390_GOTPCDBL:
223 return &elf_howto_table[(int) R_390_GOTPCDBL];
224 case BFD_RELOC_390_GOTENT:
225 return &elf_howto_table[(int) R_390_GOTENT];
226 case BFD_RELOC_16_GOTOFF:
227 return &elf_howto_table[(int) R_390_GOTOFF16];
228 case BFD_RELOC_390_GOTPLT12:
229 return &elf_howto_table[(int) R_390_GOTPLT12];
230 case BFD_RELOC_390_GOTPLT16:
231 return &elf_howto_table[(int) R_390_GOTPLT16];
232 case BFD_RELOC_390_GOTPLT32:
233 return &elf_howto_table[(int) R_390_GOTPLT32];
234 case BFD_RELOC_390_GOTPLTENT:
235 return &elf_howto_table[(int) R_390_GOTPLTENT];
236 case BFD_RELOC_390_PLTOFF16:
237 return &elf_howto_table[(int) R_390_PLTOFF16];
238 case BFD_RELOC_390_PLTOFF32:
239 return &elf_howto_table[(int) R_390_PLTOFF32];
240 case BFD_RELOC_390_TLS_LOAD:
241 return &elf_howto_table[(int) R_390_TLS_LOAD];
242 case BFD_RELOC_390_TLS_GDCALL:
243 return &elf_howto_table[(int) R_390_TLS_GDCALL];
244 case BFD_RELOC_390_TLS_LDCALL:
245 return &elf_howto_table[(int) R_390_TLS_LDCALL];
246 case BFD_RELOC_390_TLS_GD32:
247 return &elf_howto_table[(int) R_390_TLS_GD32];
248 case BFD_RELOC_390_TLS_GOTIE12:
249 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
250 case BFD_RELOC_390_TLS_GOTIE32:
251 return &elf_howto_table[(int) R_390_TLS_GOTIE32];
252 case BFD_RELOC_390_TLS_LDM32:
253 return &elf_howto_table[(int) R_390_TLS_LDM32];
254 case BFD_RELOC_390_TLS_IE32:
255 return &elf_howto_table[(int) R_390_TLS_IE32];
256 case BFD_RELOC_390_TLS_IEENT:
257 return &elf_howto_table[(int) R_390_TLS_IEENT];
258 case BFD_RELOC_390_TLS_LE32:
259 return &elf_howto_table[(int) R_390_TLS_LE32];
260 case BFD_RELOC_390_TLS_LDO32:
261 return &elf_howto_table[(int) R_390_TLS_LDO32];
262 case BFD_RELOC_390_TLS_DTPMOD:
263 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
264 case BFD_RELOC_390_TLS_DTPOFF:
265 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
266 case BFD_RELOC_390_TLS_TPOFF:
267 return &elf_howto_table[(int) R_390_TLS_TPOFF];
268 case BFD_RELOC_390_20:
269 return &elf_howto_table[(int) R_390_20];
270 case BFD_RELOC_390_GOT20:
271 return &elf_howto_table[(int) R_390_GOT20];
272 case BFD_RELOC_390_GOTPLT20:
273 return &elf_howto_table[(int) R_390_GOTPLT20];
274 case BFD_RELOC_390_TLS_GOTIE20:
275 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
276 case BFD_RELOC_390_IRELATIVE:
277 return &elf_howto_table[(int) R_390_IRELATIVE];
278 case BFD_RELOC_VTABLE_INHERIT:
279 return &elf32_s390_vtinherit_howto;
280 case BFD_RELOC_VTABLE_ENTRY:
281 return &elf32_s390_vtentry_howto;
282 default:
283 break;
284 }
285 return 0;
286 }
287
288 static reloc_howto_type *
289 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
290 const char *r_name)
291 {
292 unsigned int i;
293
294 for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++)
295 if (elf_howto_table[i].name != NULL
296 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
297 return &elf_howto_table[i];
298
299 if (strcasecmp (elf32_s390_vtinherit_howto.name, r_name) == 0)
300 return &elf32_s390_vtinherit_howto;
301 if (strcasecmp (elf32_s390_vtentry_howto.name, r_name) == 0)
302 return &elf32_s390_vtentry_howto;
303
304 return NULL;
305 }
306
307 /* We need to use ELF32_R_TYPE so we have our own copy of this function,
308 and elf32-s390.c has its own copy. */
309
310 static void
311 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
312 arelent *cache_ptr,
313 Elf_Internal_Rela *dst)
314 {
315 unsigned int r_type = ELF32_R_TYPE(dst->r_info);
316 switch (r_type)
317 {
318 case R_390_GNU_VTINHERIT:
319 cache_ptr->howto = &elf32_s390_vtinherit_howto;
320 break;
321
322 case R_390_GNU_VTENTRY:
323 cache_ptr->howto = &elf32_s390_vtentry_howto;
324 break;
325
326 default:
327 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
328 {
329 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
330 abfd, (int) r_type);
331 r_type = R_390_NONE;
332 }
333 cache_ptr->howto = &elf_howto_table[r_type];
334 }
335 }
336
337 /* A relocation function which doesn't do anything. */
338 static bfd_reloc_status_type
339 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
340 arelent *reloc_entry,
341 asymbol *symbol ATTRIBUTE_UNUSED,
342 void * data ATTRIBUTE_UNUSED,
343 asection *input_section,
344 bfd *output_bfd,
345 char **error_message ATTRIBUTE_UNUSED)
346 {
347 if (output_bfd)
348 reloc_entry->address += input_section->output_offset;
349 return bfd_reloc_ok;
350 }
351
352 /* Handle the large displacement relocs. */
353 static bfd_reloc_status_type
354 s390_elf_ldisp_reloc (bfd *abfd ATTRIBUTE_UNUSED,
355 arelent *reloc_entry,
356 asymbol *symbol,
357 void * data ATTRIBUTE_UNUSED,
358 asection *input_section,
359 bfd *output_bfd,
360 char **error_message ATTRIBUTE_UNUSED)
361 {
362 reloc_howto_type *howto = reloc_entry->howto;
363 bfd_vma relocation;
364 bfd_vma insn;
365
366 if (output_bfd != (bfd *) NULL
367 && (symbol->flags & BSF_SECTION_SYM) == 0
368 && (! howto->partial_inplace
369 || reloc_entry->addend == 0))
370 {
371 reloc_entry->address += input_section->output_offset;
372 return bfd_reloc_ok;
373 }
374
375 if (output_bfd != NULL)
376 return bfd_reloc_continue;
377
378 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
379 return bfd_reloc_outofrange;
380
381 relocation = (symbol->value
382 + symbol->section->output_section->vma
383 + symbol->section->output_offset);
384 relocation += reloc_entry->addend;
385 if (howto->pc_relative)
386 {
387 relocation -= (input_section->output_section->vma
388 + input_section->output_offset);
389 relocation -= reloc_entry->address;
390 }
391
392 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
393 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
394 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
395
396 if ((bfd_signed_vma) relocation < - 0x80000
397 || (bfd_signed_vma) relocation > 0x7ffff)
398 return bfd_reloc_overflow;
399 else
400 return bfd_reloc_ok;
401 }
402
403 static bfd_boolean
404 elf_s390_is_local_label_name (bfd *abfd, const char *name)
405 {
406 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
407 return TRUE;
408
409 return _bfd_elf_is_local_label_name (abfd, name);
410 }
411
412 /* Functions for the 390 ELF linker. */
413
414 /* The name of the dynamic interpreter. This is put in the .interp
415 section. */
416
417 #define ELF_DYNAMIC_INTERPRETER "/lib/ld.so.1"
418
419 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
420 copying dynamic variables from a shared lib into an app's dynbss
421 section, and instead use a dynamic relocation to point into the
422 shared lib. */
423 #define ELIMINATE_COPY_RELOCS 1
424
425 /* The size in bytes of the first entry in the procedure linkage table. */
426 #define PLT_FIRST_ENTRY_SIZE 32
427 /* The size in bytes of an entry in the procedure linkage table. */
428 #define PLT_ENTRY_SIZE 32
429
430 #define GOT_ENTRY_SIZE 4
431
432 #define RELA_ENTRY_SIZE sizeof (Elf32_External_Rela)
433
434 /* The first three entries in a procedure linkage table are reserved,
435 and the initial contents are unimportant (we zero them out).
436 Subsequent entries look like this. See the SVR4 ABI 386
437 supplement to see how this works. */
438
439 /* For the s390, simple addr offset can only be 0 - 4096.
440 To use the full 2 GB address space, several instructions
441 are needed to load an address in a register and execute
442 a branch( or just saving the address)
443
444 Furthermore, only r 0 and 1 are free to use!!! */
445
446 /* The first 3 words in the GOT are then reserved.
447 Word 0 is the address of the dynamic table.
448 Word 1 is a pointer to a structure describing the object
449 Word 2 is used to point to the loader entry address.
450
451 The code for position independent PLT entries looks like this:
452
453 r12 holds addr of the current GOT at entry to the PLT
454
455 The GOT holds the address in the PLT to be executed.
456 The loader then gets:
457 24(15) = Pointer to the structure describing the object.
458 28(15) = Offset into rela.plt
459
460 The loader must then find the module where the function is
461 and insert the address in the GOT.
462
463 Note: 390 can only address +- 64 K relative.
464 We check if offset > 65536, then make a relative branch -64xxx
465 back to a previous defined branch
466
467 PLT1: BASR 1,0 # 2 bytes
468 L 1,22(1) # 4 bytes Load offset in GOT in r 1
469 L 1,(1,12) # 4 bytes Load address from GOT in r1
470 BCR 15,1 # 2 bytes Jump to address
471 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
472 L 1,14(1) # 4 bytes Load offset in symol table in r1
473 BRC 15,-x # 4 bytes Jump to start of PLT
474 .word 0 # 2 bytes filler
475 .long ? # 4 bytes offset in GOT
476 .long ? # 4 bytes offset into rela.plt
477
478 This was the general case. There are two additional, optimizes PLT
479 definitions. One for GOT offsets < 4096 and one for GOT offsets < 32768.
480 First the one for GOT offsets < 4096:
481
482 PLT1: L 1,<offset>(12) # 4 bytes Load address from GOT in R1
483 BCR 15,1 # 2 bytes Jump to address
484 .word 0,0,0 # 6 bytes filler
485 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
486 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
487 BRC 15,-x # 4 bytes Jump to start of PLT
488 .word 0,0,0 # 6 bytes filler
489 .long ? # 4 bytes offset into rela.plt
490
491 Second the one for GOT offsets < 32768:
492
493 PLT1: LHI 1,<offset> # 4 bytes Load offset in GOT to r1
494 L 1,(1,12) # 4 bytes Load address from GOT to r1
495 BCR 15,1 # 2 bytes Jump to address
496 .word 0 # 2 bytes filler
497 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
498 L 1,14(1) # 4 bytes Load offset in rela.plt in r1
499 BRC 15,-x # 4 bytes Jump to start of PLT
500 .word 0,0,0 # 6 bytes filler
501 .long ? # 4 bytes offset into rela.plt
502
503 Total = 32 bytes per PLT entry
504
505 The code for static build PLT entries looks like this:
506
507 PLT1: BASR 1,0 # 2 bytes
508 L 1,22(1) # 4 bytes Load address of GOT entry
509 L 1,0(0,1) # 4 bytes Load address from GOT in r1
510 BCR 15,1 # 2 bytes Jump to address
511 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
512 L 1,14(1) # 4 bytes Load offset in symbol table in r1
513 BRC 15,-x # 4 bytes Jump to start of PLT
514 .word 0 # 2 bytes filler
515 .long ? # 4 bytes address of GOT entry
516 .long ? # 4 bytes offset into rela.plt */
517
518 static const bfd_byte elf_s390_plt_entry[PLT_ENTRY_SIZE] =
519 {
520 0x0d, 0x10, /* basr %r1,%r0 */
521 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
522 0x58, 0x10, 0x10, 0x00, /* l %r1,0(%r1) */
523 0x07, 0xf1, /* br %r1 */
524 0x0d, 0x10, /* basr %r1,%r0 */
525 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
526 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
527 0x00, 0x00, /* padding */
528 0x00, 0x00, 0x00, 0x00, /* GOT offset */
529 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
530 };
531
532 /* Generic PLT pic entry. */
533 static const bfd_byte elf_s390_plt_pic_entry[PLT_ENTRY_SIZE] =
534 {
535 0x0d, 0x10, /* basr %r1,%r0 */
536 0x58, 0x10, 0x10, 0x16, /* l %r1,22(%r1) */
537 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
538 0x07, 0xf1, /* br %r1 */
539 0x0d, 0x10, /* basr %r1,%r0 */
540 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
541 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
542 0x00, 0x00, /* padding */
543 0x00, 0x00, 0x00, 0x00, /* GOT offset */
544 0x00, 0x00, 0x00, 0x00 /* rela.plt offset */
545 };
546
547 /* Optimized PLT pic entry for GOT offset < 4k. xx will be replaced
548 when generating the PLT slot with the GOT offset. */
549 static const bfd_byte elf_s390_plt_pic12_entry[PLT_ENTRY_SIZE] =
550 {
551 0x58, 0x10, 0xc0, 0x00, /* l %r1,xx(%r12) */
552 0x07, 0xf1, /* br %r1 */
553 0x00, 0x00, 0x00, 0x00, /* padding */
554 0x00, 0x00,
555 0x0d, 0x10, /* basr %r1,%r0 */
556 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
557 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
558 0x00, 0x00, 0x00, 0x00,
559 0x00, 0x00, 0x00, 0x00
560 };
561
562 /* Optimized PLT pic entry for GOT offset < 32k. xx will be replaced
563 when generating the PLT slot with the GOT offset. */
564 static const bfd_byte elf_s390_plt_pic16_entry[PLT_ENTRY_SIZE] =
565 {
566 0xa7, 0x18, 0x00, 0x00, /* lhi %r1,xx */
567 0x58, 0x11, 0xc0, 0x00, /* l %r1,0(%r1,%r12) */
568 0x07, 0xf1, /* br %r1 */
569 0x00, 0x00,
570 0x0d, 0x10, /* basr %r1,%r0 */
571 0x58, 0x10, 0x10, 0x0e, /* l %r1,14(%r1) */
572 0xa7, 0xf4, 0x00, 0x00, /* j first plt */
573 0x00, 0x00, 0x00, 0x00,
574 0x00, 0x00, 0x00, 0x00,
575 0x00, 0x00
576 };
577
578 /* The first PLT entry pushes the offset into the rela.plt
579 from R1 onto the stack at 8(15) and the loader object info
580 at 12(15), loads the loader address in R1 and jumps to it. */
581
582 /* The first entry in the PLT for PIC code:
583
584 PLT0:
585 ST 1,28(15) # R1 has offset into rela.plt
586 L 1,4(12) # Get loader ino(object struct address)
587 ST 1,24(15) # Store address
588 L 1,8(12) # Entry address of loader in R1
589 BR 1 # Jump to loader
590
591 The first entry in the PLT for static code:
592
593 PLT0:
594 ST 1,28(15) # R1 has offset into rela.plt
595 BASR 1,0
596 L 1,18(0,1) # Get address of GOT
597 MVC 24(4,15),4(1) # Move loader ino to stack
598 L 1,8(1) # Get address of loader
599 BR 1 # Jump to loader
600 .word 0 # filler
601 .long got # address of GOT */
602
603 static const bfd_byte elf_s390_plt_first_entry[PLT_FIRST_ENTRY_SIZE] =
604 {
605 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
606 0x0d, 0x10, /* basr %r1,%r0 */
607 0x58, 0x10, 0x10, 0x12, /* l %r1,18(%r1) */
608 0xd2, 0x03, 0xf0, 0x18, 0x10, 0x04, /* mvc 24(4,%r15),4(%r1) */
609 0x58, 0x10, 0x10, 0x08, /* l %r1,8(%r1) */
610 0x07, 0xf1, /* br %r1 */
611 0x00, 0x00, 0x00, 0x00,
612 0x00, 0x00, 0x00, 0x00,
613 0x00, 0x00
614 };
615
616 static const bfd_byte elf_s390_plt_pic_first_entry[PLT_FIRST_ENTRY_SIZE] =
617 {
618 0x50, 0x10, 0xf0, 0x1c, /* st %r1,28(%r15) */
619 0x58, 0x10, 0xc0, 0x04, /* l %r1,4(%r12) */
620 0x50, 0x10, 0xf0, 0x18, /* st %r1,24(%r15) */
621 0x58, 0x10, 0xc0, 0x08, /* l %r1,8(%r12) */
622 0x07, 0xf1, /* br %r1 */
623 0x00, 0x00, 0x00, 0x00,
624 0x00, 0x00, 0x00, 0x00,
625 0x00, 0x00, 0x00, 0x00,
626 0x00, 0x00
627 };
628
629
630 /* s390 ELF linker hash entry. */
631
632 struct elf_s390_link_hash_entry
633 {
634 struct elf_link_hash_entry elf;
635
636 /* Track dynamic relocs copied for this symbol. */
637 struct elf_dyn_relocs *dyn_relocs;
638
639 /* Number of GOTPLT references for a function. */
640 bfd_signed_vma gotplt_refcount;
641
642 #define GOT_UNKNOWN 0
643 #define GOT_NORMAL 1
644 #define GOT_TLS_GD 2
645 #define GOT_TLS_IE 3
646 #define GOT_TLS_IE_NLT 4
647 unsigned char tls_type;
648
649 /* For pointer equality reasons we might need to change the symbol
650 type from STT_GNU_IFUNC to STT_FUNC together with its value and
651 section entry. So after alloc_dynrelocs only these values should
652 be used. In order to check whether a symbol is IFUNC use
653 s390_is_ifunc_symbol_p. */
654 bfd_vma ifunc_resolver_address;
655 asection *ifunc_resolver_section;
656 };
657
658 #define elf_s390_hash_entry(ent) \
659 ((struct elf_s390_link_hash_entry *)(ent))
660
661 /* This structure represents an entry in the local PLT list needed for
662 local IFUNC symbols. */
663 struct plt_entry
664 {
665 /* The section of the local symbol.
666 Set in relocate_section and used in finish_dynamic_sections. */
667 asection *sec;
668
669 union
670 {
671 bfd_signed_vma refcount;
672 bfd_vma offset;
673 } plt;
674 };
675
676 /* NOTE: Keep this structure in sync with
677 the one declared in elf64-s390.c. */
678 struct elf_s390_obj_tdata
679 {
680 struct elf_obj_tdata root;
681
682 /* A local PLT is needed for ifunc symbols. */
683 struct plt_entry *local_plt;
684
685 /* TLS type for each local got entry. */
686 char *local_got_tls_type;
687 };
688
689 #define elf_s390_tdata(abfd) \
690 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
691
692 #define elf_s390_local_plt(abfd) \
693 (elf_s390_tdata (abfd)->local_plt)
694
695 #define elf_s390_local_got_tls_type(abfd) \
696 (elf_s390_tdata (abfd)->local_got_tls_type)
697
698 #define is_s390_elf(bfd) \
699 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
700 && elf_tdata (bfd) != NULL \
701 && elf_object_id (bfd) == S390_ELF_DATA)
702
703 static bfd_boolean
704 elf_s390_mkobject (bfd *abfd)
705 {
706 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
707 S390_ELF_DATA);
708 }
709
710 static bfd_boolean
711 elf_s390_object_p (bfd *abfd)
712 {
713 /* Set the right machine number for an s390 elf32 file. */
714 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_31);
715 }
716
717 /* s390 ELF linker hash table. */
718
719 struct elf_s390_link_hash_table
720 {
721 struct elf_link_hash_table elf;
722
723 /* Short-cuts to get to dynamic linker sections. */
724 asection *sdynbss;
725 asection *srelbss;
726 asection *irelifunc;
727
728 union
729 {
730 bfd_signed_vma refcount;
731 bfd_vma offset;
732 } tls_ldm_got;
733
734 /* Small local sym cache. */
735 struct sym_cache sym_cache;
736 };
737
738 /* Get the s390 ELF linker hash table from a link_info structure. */
739
740 #define elf_s390_hash_table(p) \
741 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
742 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
743
744 #undef ELF64
745 #include "elf-s390-common.c"
746
747 /* Create an entry in an s390 ELF linker hash table. */
748
749 static struct bfd_hash_entry *
750 link_hash_newfunc (struct bfd_hash_entry *entry,
751 struct bfd_hash_table *table,
752 const char *string)
753 {
754 /* Allocate the structure if it has not already been allocated by a
755 subclass. */
756 if (entry == NULL)
757 {
758 entry = bfd_hash_allocate (table,
759 sizeof (struct elf_s390_link_hash_entry));
760 if (entry == NULL)
761 return entry;
762 }
763
764 /* Call the allocation method of the superclass. */
765 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
766 if (entry != NULL)
767 {
768 struct elf_s390_link_hash_entry *eh;
769
770 eh = (struct elf_s390_link_hash_entry *) entry;
771 eh->dyn_relocs = NULL;
772 eh->gotplt_refcount = 0;
773 eh->tls_type = GOT_UNKNOWN;
774 eh->ifunc_resolver_address = 0;
775 eh->ifunc_resolver_section = NULL;
776 }
777
778 return entry;
779 }
780
781 /* Create an s390 ELF linker hash table. */
782
783 static struct bfd_link_hash_table *
784 elf_s390_link_hash_table_create (bfd *abfd)
785 {
786 struct elf_s390_link_hash_table *ret;
787 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
788
789 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
790 if (ret == NULL)
791 return NULL;
792
793 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
794 sizeof (struct elf_s390_link_hash_entry),
795 S390_ELF_DATA))
796 {
797 free (ret);
798 return NULL;
799 }
800
801 return &ret->elf.root;
802 }
803
804 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
805 shortcuts to them in our hash table. */
806
807 static bfd_boolean
808 create_got_section (bfd *dynobj, struct bfd_link_info *info)
809 {
810 struct elf_s390_link_hash_table *htab;
811
812 if (! _bfd_elf_create_got_section (dynobj, info))
813 return FALSE;
814
815 htab = elf_s390_hash_table (info);
816 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
817 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
818 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
819 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
820 abort ();
821
822 return TRUE;
823 }
824
825 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
826 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
827 hash table. */
828
829 static bfd_boolean
830 elf_s390_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info)
831 {
832 struct elf_s390_link_hash_table *htab;
833
834 htab = elf_s390_hash_table (info);
835 if (!htab->elf.sgot && !create_got_section (dynobj, info))
836 return FALSE;
837
838 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
839 return FALSE;
840
841 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
842 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
843 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
844 if (!info->shared)
845 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
846
847 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
848 || (!info->shared && !htab->srelbss))
849 abort ();
850
851 return TRUE;
852 }
853
854 /* Copy the extra info we tack onto an elf_link_hash_entry. */
855
856 static void
857 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
858 struct elf_link_hash_entry *dir,
859 struct elf_link_hash_entry *ind)
860 {
861 struct elf_s390_link_hash_entry *edir, *eind;
862
863 edir = (struct elf_s390_link_hash_entry *) dir;
864 eind = (struct elf_s390_link_hash_entry *) ind;
865
866 if (eind->dyn_relocs != NULL)
867 {
868 if (edir->dyn_relocs != NULL)
869 {
870 struct elf_dyn_relocs **pp;
871 struct elf_dyn_relocs *p;
872
873 /* Add reloc counts against the indirect sym to the direct sym
874 list. Merge any entries against the same section. */
875 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
876 {
877 struct elf_dyn_relocs *q;
878
879 for (q = edir->dyn_relocs; q != NULL; q = q->next)
880 if (q->sec == p->sec)
881 {
882 q->pc_count += p->pc_count;
883 q->count += p->count;
884 *pp = p->next;
885 break;
886 }
887 if (q == NULL)
888 pp = &p->next;
889 }
890 *pp = edir->dyn_relocs;
891 }
892
893 edir->dyn_relocs = eind->dyn_relocs;
894 eind->dyn_relocs = NULL;
895 }
896
897 if (ind->root.type == bfd_link_hash_indirect
898 && dir->got.refcount <= 0)
899 {
900 edir->tls_type = eind->tls_type;
901 eind->tls_type = GOT_UNKNOWN;
902 }
903
904 if (ELIMINATE_COPY_RELOCS
905 && ind->root.type != bfd_link_hash_indirect
906 && dir->dynamic_adjusted)
907 {
908 /* If called to transfer flags for a weakdef during processing
909 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
910 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
911 dir->ref_dynamic |= ind->ref_dynamic;
912 dir->ref_regular |= ind->ref_regular;
913 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
914 dir->needs_plt |= ind->needs_plt;
915 }
916 else
917 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
918 }
919
920 static int
921 elf_s390_tls_transition (struct bfd_link_info *info,
922 int r_type,
923 int is_local)
924 {
925 if (info->shared)
926 return r_type;
927
928 switch (r_type)
929 {
930 case R_390_TLS_GD32:
931 case R_390_TLS_IE32:
932 if (is_local)
933 return R_390_TLS_LE32;
934 return R_390_TLS_IE32;
935 case R_390_TLS_GOTIE32:
936 if (is_local)
937 return R_390_TLS_LE32;
938 return R_390_TLS_GOTIE32;
939 case R_390_TLS_LDM32:
940 return R_390_TLS_LE32;
941 }
942
943 return r_type;
944 }
945
946 /* Look through the relocs for a section during the first phase, and
947 allocate space in the global offset table or procedure linkage
948 table. */
949
950 static bfd_boolean
951 elf_s390_check_relocs (bfd *abfd,
952 struct bfd_link_info *info,
953 asection *sec,
954 const Elf_Internal_Rela *relocs)
955 {
956 struct elf_s390_link_hash_table *htab;
957 Elf_Internal_Shdr *symtab_hdr;
958 struct elf_link_hash_entry **sym_hashes;
959 const Elf_Internal_Rela *rel;
960 const Elf_Internal_Rela *rel_end;
961 asection *sreloc;
962 bfd_signed_vma *local_got_refcounts;
963 int tls_type, old_tls_type;
964 Elf_Internal_Sym *isym;
965
966 if (info->relocatable)
967 return TRUE;
968
969 BFD_ASSERT (is_s390_elf (abfd));
970
971 htab = elf_s390_hash_table (info);
972 symtab_hdr = &elf_symtab_hdr (abfd);
973 sym_hashes = elf_sym_hashes (abfd);
974 local_got_refcounts = elf_local_got_refcounts (abfd);
975
976 sreloc = NULL;
977
978 rel_end = relocs + sec->reloc_count;
979 for (rel = relocs; rel < rel_end; rel++)
980 {
981 unsigned int r_type;
982 unsigned long r_symndx;
983 struct elf_link_hash_entry *h;
984
985 r_symndx = ELF32_R_SYM (rel->r_info);
986
987 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
988 {
989 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
990 abfd, r_symndx);
991 return FALSE;
992 }
993
994 if (r_symndx < symtab_hdr->sh_info)
995 {
996 /* A local symbol. */
997 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
998 abfd, r_symndx);
999 if (isym == NULL)
1000 return FALSE;
1001
1002 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1003 {
1004 struct plt_entry *plt;
1005
1006 if (htab->elf.dynobj == NULL)
1007 htab->elf.dynobj = abfd;
1008
1009 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1010 return FALSE;
1011
1012 if (local_got_refcounts == NULL)
1013 {
1014 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1015 return FALSE;
1016 local_got_refcounts = elf_local_got_refcounts (abfd);
1017 }
1018 plt = elf_s390_local_plt (abfd);
1019 plt[r_symndx].plt.refcount++;
1020 }
1021 h = NULL;
1022 }
1023 else
1024 {
1025 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1026 while (h->root.type == bfd_link_hash_indirect
1027 || h->root.type == bfd_link_hash_warning)
1028 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1029
1030 /* PR15323, ref flags aren't set for references in the same
1031 object. */
1032 h->root.non_ir_ref = 1;
1033 }
1034
1035 /* Create got section and local_got_refcounts array if they
1036 are needed. */
1037 r_type = elf_s390_tls_transition (info,
1038 ELF32_R_TYPE (rel->r_info),
1039 h == NULL);
1040 switch (r_type)
1041 {
1042 case R_390_GOT12:
1043 case R_390_GOT16:
1044 case R_390_GOT20:
1045 case R_390_GOT32:
1046 case R_390_GOTENT:
1047 case R_390_GOTPLT12:
1048 case R_390_GOTPLT16:
1049 case R_390_GOTPLT20:
1050 case R_390_GOTPLT32:
1051 case R_390_GOTPLTENT:
1052 case R_390_TLS_GD32:
1053 case R_390_TLS_GOTIE12:
1054 case R_390_TLS_GOTIE20:
1055 case R_390_TLS_GOTIE32:
1056 case R_390_TLS_IEENT:
1057 case R_390_TLS_IE32:
1058 case R_390_TLS_LDM32:
1059 if (h == NULL
1060 && local_got_refcounts == NULL)
1061 {
1062 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
1063 return FALSE;
1064 local_got_refcounts = elf_local_got_refcounts (abfd);
1065 }
1066 /* Fall through. */
1067 case R_390_GOTOFF16:
1068 case R_390_GOTOFF32:
1069 case R_390_GOTPC:
1070 case R_390_GOTPCDBL:
1071 if (htab->elf.sgot == NULL)
1072 {
1073 if (htab->elf.dynobj == NULL)
1074 htab->elf.dynobj = abfd;
1075 if (!create_got_section (htab->elf.dynobj, info))
1076 return FALSE;
1077 }
1078 }
1079
1080 if (h != NULL)
1081 {
1082 if (htab->elf.dynobj == NULL)
1083 htab->elf.dynobj = abfd;
1084 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1085 return FALSE;
1086
1087 /* Make sure an IFUNC symbol defined in a non-shared object
1088 always gets a PLT slot. */
1089 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1090 {
1091 /* The symbol is called by the dynamic loader in order
1092 to resolve the relocation. So it is in fact also
1093 referenced. */
1094 h->ref_regular = 1;
1095 h->needs_plt = 1;
1096 }
1097 }
1098 switch (r_type)
1099 {
1100 case R_390_GOTOFF16:
1101 case R_390_GOTOFF32:
1102 case R_390_GOTPC:
1103 case R_390_GOTPCDBL:
1104 /* These relocs do not need a GOT slot. They just load the
1105 GOT pointer itself or address something else relative to
1106 the GOT. Since the GOT pointer has been set up above we
1107 are done. */
1108 break;
1109
1110 case R_390_PLT16DBL:
1111 case R_390_PLT32DBL:
1112 case R_390_PLT32:
1113 case R_390_PLTOFF16:
1114 case R_390_PLTOFF32:
1115 /* This symbol requires a procedure linkage table entry. We
1116 actually build the entry in adjust_dynamic_symbol,
1117 because this might be a case of linking PIC code which is
1118 never referenced by a dynamic object, in which case we
1119 don't need to generate a procedure linkage table entry
1120 after all. */
1121
1122 /* If this is a local symbol, we resolve it directly without
1123 creating a procedure linkage table entry. */
1124 if (h != NULL)
1125 {
1126 h->needs_plt = 1;
1127 h->plt.refcount += 1;
1128 }
1129 break;
1130
1131 case R_390_GOTPLT12:
1132 case R_390_GOTPLT16:
1133 case R_390_GOTPLT20:
1134 case R_390_GOTPLT32:
1135 case R_390_GOTPLTENT:
1136 /* This symbol requires either a procedure linkage table entry
1137 or an entry in the local got. We actually build the entry
1138 in adjust_dynamic_symbol because whether this is really a
1139 global reference can change and with it the fact if we have
1140 to create a plt entry or a local got entry. To be able to
1141 make a once global symbol a local one we have to keep track
1142 of the number of gotplt references that exist for this
1143 symbol. */
1144 if (h != NULL)
1145 {
1146 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1147 h->needs_plt = 1;
1148 h->plt.refcount += 1;
1149 }
1150 else
1151 local_got_refcounts[r_symndx] += 1;
1152 break;
1153
1154 case R_390_TLS_LDM32:
1155 htab->tls_ldm_got.refcount += 1;
1156 break;
1157
1158 case R_390_TLS_IE32:
1159 case R_390_TLS_GOTIE12:
1160 case R_390_TLS_GOTIE20:
1161 case R_390_TLS_GOTIE32:
1162 case R_390_TLS_IEENT:
1163 if (info->shared)
1164 info->flags |= DF_STATIC_TLS;
1165 /* Fall through. */
1166
1167 case R_390_GOT12:
1168 case R_390_GOT16:
1169 case R_390_GOT20:
1170 case R_390_GOT32:
1171 case R_390_GOTENT:
1172 case R_390_TLS_GD32:
1173 /* This symbol requires a global offset table entry. */
1174 switch (r_type)
1175 {
1176 default:
1177 case R_390_GOT12:
1178 case R_390_GOT16:
1179 case R_390_GOT20:
1180 case R_390_GOT32:
1181 case R_390_GOTENT:
1182 tls_type = GOT_NORMAL;
1183 break;
1184 case R_390_TLS_GD32:
1185 tls_type = GOT_TLS_GD;
1186 break;
1187 case R_390_TLS_IE32:
1188 case R_390_TLS_GOTIE32:
1189 tls_type = GOT_TLS_IE;
1190 break;
1191 case R_390_TLS_GOTIE12:
1192 case R_390_TLS_GOTIE20:
1193 case R_390_TLS_IEENT:
1194 tls_type = GOT_TLS_IE_NLT;
1195 break;
1196 }
1197
1198 if (h != NULL)
1199 {
1200 h->got.refcount += 1;
1201 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1202 }
1203 else
1204 {
1205 local_got_refcounts[r_symndx] += 1;
1206 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1207 }
1208 /* If a TLS symbol is accessed using IE at least once,
1209 there is no point to use dynamic model for it. */
1210 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1211 {
1212 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1213 {
1214 (*_bfd_error_handler)
1215 (_("%B: `%s' accessed both as normal and thread local symbol"),
1216 abfd, h->root.root.string);
1217 return FALSE;
1218 }
1219 if (old_tls_type > tls_type)
1220 tls_type = old_tls_type;
1221 }
1222
1223 if (old_tls_type != tls_type)
1224 {
1225 if (h != NULL)
1226 elf_s390_hash_entry (h)->tls_type = tls_type;
1227 else
1228 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1229 }
1230
1231 if (r_type != R_390_TLS_IE32)
1232 break;
1233 /* Fall through. */
1234
1235 case R_390_TLS_LE32:
1236 if (!info->shared)
1237 break;
1238 info->flags |= DF_STATIC_TLS;
1239 /* Fall through. */
1240
1241 case R_390_8:
1242 case R_390_16:
1243 case R_390_32:
1244 case R_390_PC16:
1245 case R_390_PC16DBL:
1246 case R_390_PC32DBL:
1247 case R_390_PC32:
1248 if (h != NULL)
1249 {
1250 /* If this reloc is in a read-only section, we might
1251 need a copy reloc. We can't check reliably at this
1252 stage whether the section is read-only, as input
1253 sections have not yet been mapped to output sections.
1254 Tentatively set the flag for now, and correct in
1255 adjust_dynamic_symbol. */
1256 h->non_got_ref = 1;
1257
1258 if (!info->shared)
1259 {
1260 /* We may need a .plt entry if the function this reloc
1261 refers to is in a shared lib. */
1262 h->plt.refcount += 1;
1263 }
1264 }
1265
1266 /* If we are creating a shared library, and this is a reloc
1267 against a global symbol, or a non PC relative reloc
1268 against a local symbol, then we need to copy the reloc
1269 into the shared library. However, if we are linking with
1270 -Bsymbolic, we do not need to copy a reloc against a
1271 global symbol which is defined in an object we are
1272 including in the link (i.e., DEF_REGULAR is set). At
1273 this point we have not seen all the input files, so it is
1274 possible that DEF_REGULAR is not set now but will be set
1275 later (it is never cleared). In case of a weak definition,
1276 DEF_REGULAR may be cleared later by a strong definition in
1277 a shared library. We account for that possibility below by
1278 storing information in the relocs_copied field of the hash
1279 table entry. A similar situation occurs when creating
1280 shared libraries and symbol visibility changes render the
1281 symbol local.
1282
1283 If on the other hand, we are creating an executable, we
1284 may need to keep relocations for symbols satisfied by a
1285 dynamic library if we manage to avoid copy relocs for the
1286 symbol. */
1287 if ((info->shared
1288 && (sec->flags & SEC_ALLOC) != 0
1289 && ((ELF32_R_TYPE (rel->r_info) != R_390_PC16
1290 && ELF32_R_TYPE (rel->r_info) != R_390_PC16DBL
1291 && ELF32_R_TYPE (rel->r_info) != R_390_PC32DBL
1292 && ELF32_R_TYPE (rel->r_info) != R_390_PC32)
1293 || (h != NULL
1294 && (! SYMBOLIC_BIND (info, h)
1295 || h->root.type == bfd_link_hash_defweak
1296 || !h->def_regular))))
1297 || (ELIMINATE_COPY_RELOCS
1298 && !info->shared
1299 && (sec->flags & SEC_ALLOC) != 0
1300 && h != NULL
1301 && (h->root.type == bfd_link_hash_defweak
1302 || !h->def_regular)))
1303 {
1304 struct elf_dyn_relocs *p;
1305 struct elf_dyn_relocs **head;
1306
1307 /* We must copy these reloc types into the output file.
1308 Create a reloc section in dynobj and make room for
1309 this reloc. */
1310 if (sreloc == NULL)
1311 {
1312 if (htab->elf.dynobj == NULL)
1313 htab->elf.dynobj = abfd;
1314
1315 sreloc = _bfd_elf_make_dynamic_reloc_section
1316 (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ TRUE);
1317
1318 if (sreloc == NULL)
1319 return FALSE;
1320 }
1321
1322 /* If this is a global symbol, we count the number of
1323 relocations we need for this symbol. */
1324 if (h != NULL)
1325 {
1326 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1327 }
1328 else
1329 {
1330 /* Track dynamic relocs needed for local syms too.
1331 We really need local syms available to do this
1332 easily. Oh well. */
1333 asection *s;
1334 void *vpp;
1335
1336 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1337 abfd, r_symndx);
1338 if (isym == NULL)
1339 return FALSE;
1340
1341 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1342 if (s == NULL)
1343 s = sec;
1344
1345 vpp = &elf_section_data (s)->local_dynrel;
1346 head = (struct elf_dyn_relocs **) vpp;
1347 }
1348
1349 p = *head;
1350 if (p == NULL || p->sec != sec)
1351 {
1352 bfd_size_type amt = sizeof *p;
1353
1354 p = ((struct elf_dyn_relocs *)
1355 bfd_alloc (htab->elf.dynobj, amt));
1356 if (p == NULL)
1357 return FALSE;
1358 p->next = *head;
1359 *head = p;
1360 p->sec = sec;
1361 p->count = 0;
1362 p->pc_count = 0;
1363 }
1364
1365 p->count += 1;
1366 if (ELF32_R_TYPE (rel->r_info) == R_390_PC16
1367 || ELF32_R_TYPE (rel->r_info) == R_390_PC16DBL
1368 || ELF32_R_TYPE (rel->r_info) == R_390_PC32DBL
1369 || ELF32_R_TYPE (rel->r_info) == R_390_PC32)
1370 p->pc_count += 1;
1371 }
1372 break;
1373
1374 /* This relocation describes the C++ object vtable hierarchy.
1375 Reconstruct it for later use during GC. */
1376 case R_390_GNU_VTINHERIT:
1377 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1378 return FALSE;
1379 break;
1380
1381 /* This relocation describes which C++ vtable entries are actually
1382 used. Record for later use during GC. */
1383 case R_390_GNU_VTENTRY:
1384 BFD_ASSERT (h != NULL);
1385 if (h != NULL
1386 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1387 return FALSE;
1388 break;
1389
1390 default:
1391 break;
1392 }
1393 }
1394
1395 return TRUE;
1396 }
1397
1398 /* Return the section that should be marked against GC for a given
1399 relocation. */
1400
1401 static asection *
1402 elf_s390_gc_mark_hook (asection *sec,
1403 struct bfd_link_info *info,
1404 Elf_Internal_Rela *rel,
1405 struct elf_link_hash_entry *h,
1406 Elf_Internal_Sym *sym)
1407 {
1408 if (h != NULL)
1409 switch (ELF32_R_TYPE (rel->r_info))
1410 {
1411 case R_390_GNU_VTINHERIT:
1412 case R_390_GNU_VTENTRY:
1413 return NULL;
1414 }
1415 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1416
1417 }
1418
1419 /* Update the got entry reference counts for the section being removed. */
1420
1421 static bfd_boolean
1422 elf_s390_gc_sweep_hook (bfd *abfd,
1423 struct bfd_link_info *info,
1424 asection *sec,
1425 const Elf_Internal_Rela *relocs)
1426 {
1427 struct elf_s390_link_hash_table *htab;
1428 Elf_Internal_Shdr *symtab_hdr;
1429 struct elf_link_hash_entry **sym_hashes;
1430 bfd_signed_vma *local_got_refcounts;
1431 const Elf_Internal_Rela *rel, *relend;
1432
1433 if (info->relocatable)
1434 return TRUE;
1435
1436 htab = elf_s390_hash_table (info);
1437 if (htab == NULL)
1438 return FALSE;
1439
1440 elf_section_data (sec)->local_dynrel = NULL;
1441
1442 symtab_hdr = &elf_symtab_hdr (abfd);
1443 sym_hashes = elf_sym_hashes (abfd);
1444 local_got_refcounts = elf_local_got_refcounts (abfd);
1445
1446 relend = relocs + sec->reloc_count;
1447 for (rel = relocs; rel < relend; rel++)
1448 {
1449 unsigned long r_symndx;
1450 unsigned int r_type;
1451 struct elf_link_hash_entry *h = NULL;
1452
1453 r_symndx = ELF32_R_SYM (rel->r_info);
1454 if (r_symndx >= symtab_hdr->sh_info)
1455 {
1456 struct elf_s390_link_hash_entry *eh;
1457 struct elf_dyn_relocs **pp;
1458 struct elf_dyn_relocs *p;
1459
1460 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1461 while (h->root.type == bfd_link_hash_indirect
1462 || h->root.type == bfd_link_hash_warning)
1463 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1464 eh = (struct elf_s390_link_hash_entry *) h;
1465
1466 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1467 if (p->sec == sec)
1468 {
1469 /* Everything must go for SEC. */
1470 *pp = p->next;
1471 break;
1472 }
1473 }
1474 else
1475 {
1476 Elf_Internal_Sym *isym;
1477
1478 /* A local symbol. */
1479 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1480 abfd, r_symndx);
1481 if (isym == NULL)
1482 return FALSE;
1483
1484 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1485 {
1486 struct plt_entry *plt = elf_s390_local_plt (abfd);
1487 if (plt[r_symndx].plt.refcount > 0)
1488 plt[r_symndx].plt.refcount--;
1489 }
1490 }
1491
1492 r_type = ELF32_R_TYPE (rel->r_info);
1493 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1494 switch (r_type)
1495 {
1496 case R_390_TLS_LDM32:
1497 if (elf_s390_hash_table (info)->tls_ldm_got.refcount > 0)
1498 elf_s390_hash_table (info)->tls_ldm_got.refcount -= 1;
1499 break;
1500
1501 case R_390_TLS_GD32:
1502 case R_390_TLS_IE32:
1503 case R_390_TLS_GOTIE12:
1504 case R_390_TLS_GOTIE20:
1505 case R_390_TLS_GOTIE32:
1506 case R_390_TLS_IEENT:
1507 case R_390_GOT12:
1508 case R_390_GOT16:
1509 case R_390_GOT20:
1510 case R_390_GOT32:
1511 case R_390_GOTOFF16:
1512 case R_390_GOTOFF32:
1513 case R_390_GOTPC:
1514 case R_390_GOTPCDBL:
1515 case R_390_GOTENT:
1516 if (h != NULL)
1517 {
1518 if (h->got.refcount > 0)
1519 h->got.refcount -= 1;
1520 }
1521 else if (local_got_refcounts != NULL)
1522 {
1523 if (local_got_refcounts[r_symndx] > 0)
1524 local_got_refcounts[r_symndx] -= 1;
1525 }
1526 break;
1527
1528 case R_390_8:
1529 case R_390_12:
1530 case R_390_16:
1531 case R_390_20:
1532 case R_390_32:
1533 case R_390_PC16:
1534 case R_390_PC16DBL:
1535 case R_390_PC32DBL:
1536 case R_390_PC32:
1537 if (info->shared)
1538 break;
1539 /* Fall through. */
1540
1541 case R_390_PLT16DBL:
1542 case R_390_PLT32DBL:
1543 case R_390_PLT32:
1544 case R_390_PLTOFF16:
1545 case R_390_PLTOFF32:
1546 if (h != NULL)
1547 {
1548 if (h->plt.refcount > 0)
1549 h->plt.refcount -= 1;
1550 }
1551 break;
1552
1553 case R_390_GOTPLT12:
1554 case R_390_GOTPLT16:
1555 case R_390_GOTPLT20:
1556 case R_390_GOTPLT32:
1557 case R_390_GOTPLTENT:
1558 if (h != NULL)
1559 {
1560 if (h->plt.refcount > 0)
1561 {
1562 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1563 h->plt.refcount -= 1;
1564 }
1565 }
1566 else if (local_got_refcounts != NULL)
1567 {
1568 if (local_got_refcounts[r_symndx] > 0)
1569 local_got_refcounts[r_symndx] -= 1;
1570 }
1571 break;
1572
1573 default:
1574 break;
1575 }
1576 }
1577
1578 return TRUE;
1579 }
1580
1581 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1582 entry but we found we will not create any. Called when we find we will
1583 not have any PLT for this symbol, by for example
1584 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1585 or elf_s390_size_dynamic_sections if no dynamic sections will be
1586 created (we're only linking static objects). */
1587
1588 static void
1589 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1590 {
1591 if (h->elf.root.type == bfd_link_hash_warning)
1592 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1593
1594 if (h->gotplt_refcount <= 0)
1595 return;
1596
1597 /* We simply add the number of gotplt references to the number
1598 * of got references for this symbol. */
1599 h->elf.got.refcount += h->gotplt_refcount;
1600 h->gotplt_refcount = -1;
1601 }
1602
1603 /* Adjust a symbol defined by a dynamic object and referenced by a
1604 regular object. The current definition is in some section of the
1605 dynamic object, but we're not including those sections. We have to
1606 change the definition to something the rest of the link can
1607 understand. */
1608
1609 static bfd_boolean
1610 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1611 struct elf_link_hash_entry *h)
1612 {
1613 struct elf_s390_link_hash_table *htab;
1614 asection *s;
1615
1616 /* STT_GNU_IFUNC symbol must go through PLT. */
1617 if (s390_is_ifunc_symbol_p (h))
1618 return TRUE;
1619
1620 /* If this is a function, put it in the procedure linkage table. We
1621 will fill in the contents of the procedure linkage table later
1622 (although we could actually do it here). */
1623 if (h->type == STT_FUNC
1624 || h->needs_plt)
1625 {
1626 if (h->plt.refcount <= 0
1627 || SYMBOL_CALLS_LOCAL (info, h)
1628 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1629 && h->root.type != bfd_link_hash_undefweak))
1630 {
1631 /* This case can occur if we saw a PLT32 reloc in an input
1632 file, but the symbol was never referred to by a dynamic
1633 object, or if all references were garbage collected. In
1634 such a case, we don't actually need to build a procedure
1635 linkage table, and we can just do a PC32 reloc instead. */
1636 h->plt.offset = (bfd_vma) -1;
1637 h->needs_plt = 0;
1638 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1639 }
1640
1641 return TRUE;
1642 }
1643 else
1644 /* It's possible that we incorrectly decided a .plt reloc was
1645 needed for an R_390_PC32 reloc to a non-function sym in
1646 check_relocs. We can't decide accurately between function and
1647 non-function syms in check-relocs; Objects loaded later in
1648 the link may change h->type. So fix it now. */
1649 h->plt.offset = (bfd_vma) -1;
1650
1651 /* If this is a weak symbol, and there is a real definition, the
1652 processor independent code will have arranged for us to see the
1653 real definition first, and we can just use the same value. */
1654 if (h->u.weakdef != NULL)
1655 {
1656 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1657 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1658 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1659 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1660 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1661 h->non_got_ref = h->u.weakdef->non_got_ref;
1662 return TRUE;
1663 }
1664
1665 /* This is a reference to a symbol defined by a dynamic object which
1666 is not a function. */
1667
1668 /* If we are creating a shared library, we must presume that the
1669 only references to the symbol are via the global offset table.
1670 For such cases we need not do anything here; the relocations will
1671 be handled correctly by relocate_section. */
1672 if (info->shared)
1673 return TRUE;
1674
1675 /* If there are no references to this symbol that do not use the
1676 GOT, we don't need to generate a copy reloc. */
1677 if (!h->non_got_ref)
1678 return TRUE;
1679
1680 /* If -z nocopyreloc was given, we won't generate them either. */
1681 if (info->nocopyreloc)
1682 {
1683 h->non_got_ref = 0;
1684 return TRUE;
1685 }
1686
1687 if (ELIMINATE_COPY_RELOCS)
1688 {
1689 struct elf_s390_link_hash_entry * eh;
1690 struct elf_dyn_relocs *p;
1691
1692 eh = (struct elf_s390_link_hash_entry *) h;
1693 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1694 {
1695 s = p->sec->output_section;
1696 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1697 break;
1698 }
1699
1700 /* If we didn't find any dynamic relocs in read-only sections, then
1701 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1702 if (p == NULL)
1703 {
1704 h->non_got_ref = 0;
1705 return TRUE;
1706 }
1707 }
1708
1709 /* We must allocate the symbol in our .dynbss section, which will
1710 become part of the .bss section of the executable. There will be
1711 an entry for this symbol in the .dynsym section. The dynamic
1712 object will contain position independent code, so all references
1713 from the dynamic object to this symbol will go through the global
1714 offset table. The dynamic linker will use the .dynsym entry to
1715 determine the address it must put in the global offset table, so
1716 both the dynamic object and the regular object will refer to the
1717 same memory location for the variable. */
1718
1719 htab = elf_s390_hash_table (info);
1720
1721 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1722 copy the initial value out of the dynamic object and into the
1723 runtime process image. */
1724 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1725 {
1726 htab->srelbss->size += sizeof (Elf32_External_Rela);
1727 h->needs_copy = 1;
1728 }
1729
1730 s = htab->sdynbss;
1731
1732 return _bfd_elf_adjust_dynamic_copy (h, s);
1733 }
1734
1735 /* Allocate space in .plt, .got and associated reloc sections for
1736 dynamic relocs. */
1737
1738 static bfd_boolean
1739 allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1740 {
1741 struct bfd_link_info *info;
1742 struct elf_s390_link_hash_table *htab;
1743 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1744 struct elf_dyn_relocs *p;
1745
1746 if (h->root.type == bfd_link_hash_indirect)
1747 return TRUE;
1748
1749 info = (struct bfd_link_info *) inf;
1750 htab = elf_s390_hash_table (info);
1751
1752 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1753 here if it is defined and referenced in a non-shared object. */
1754 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1755 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1756 &eh->dyn_relocs);
1757 else if (htab->elf.dynamic_sections_created
1758 && h->plt.refcount > 0)
1759 {
1760 /* Make sure this symbol is output as a dynamic symbol.
1761 Undefined weak syms won't yet be marked as dynamic. */
1762 if (h->dynindx == -1
1763 && !h->forced_local)
1764 {
1765 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1766 return FALSE;
1767 }
1768
1769 if (info->shared
1770 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1771 {
1772 asection *s = htab->elf.splt;
1773
1774 /* If this is the first .plt entry, make room for the special
1775 first entry. */
1776 if (s->size == 0)
1777 s->size += PLT_FIRST_ENTRY_SIZE;
1778
1779 h->plt.offset = s->size;
1780
1781 /* If this symbol is not defined in a regular file, and we are
1782 not generating a shared library, then set the symbol to this
1783 location in the .plt. This is required to make function
1784 pointers compare as equal between the normal executable and
1785 the shared library. */
1786 if (! info->shared
1787 && !h->def_regular)
1788 {
1789 h->root.u.def.section = s;
1790 h->root.u.def.value = h->plt.offset;
1791 }
1792
1793 /* Make room for this entry. */
1794 s->size += PLT_ENTRY_SIZE;
1795
1796 /* We also need to make an entry in the .got.plt section, which
1797 will be placed in the .got section by the linker script. */
1798 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1799
1800 /* We also need to make an entry in the .rela.plt section. */
1801 htab->elf.srelplt->size += sizeof (Elf32_External_Rela);
1802 }
1803 else
1804 {
1805 h->plt.offset = (bfd_vma) -1;
1806 h->needs_plt = 0;
1807 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1808 }
1809 }
1810 else
1811 {
1812 h->plt.offset = (bfd_vma) -1;
1813 h->needs_plt = 0;
1814 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1815 }
1816
1817 /* If R_390_TLS_{IE32,GOTIE32,GOTIE12,IEENT} symbol is now local to
1818 the binary, we can optimize a bit. IE32 and GOTIE32 get converted
1819 to R_390_TLS_LE32 requiring no TLS entry. For GOTIE12 and IEENT
1820 we can save the dynamic TLS relocation. */
1821 if (h->got.refcount > 0
1822 && !info->shared
1823 && h->dynindx == -1
1824 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1825 {
1826 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1827 /* For the GOTIE access without a literal pool entry the offset has
1828 to be stored somewhere. The immediate value in the instruction
1829 is not bit enough so the value is stored in the got. */
1830 {
1831 h->got.offset = htab->elf.sgot->size;
1832 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1833 }
1834 else
1835 h->got.offset = (bfd_vma) -1;
1836 }
1837 else if (h->got.refcount > 0)
1838 {
1839 asection *s;
1840 bfd_boolean dyn;
1841 int tls_type = elf_s390_hash_entry(h)->tls_type;
1842
1843 /* Make sure this symbol is output as a dynamic symbol.
1844 Undefined weak syms won't yet be marked as dynamic. */
1845 if (h->dynindx == -1
1846 && !h->forced_local)
1847 {
1848 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1849 return FALSE;
1850 }
1851
1852 s = htab->elf.sgot;
1853 h->got.offset = s->size;
1854 s->size += GOT_ENTRY_SIZE;
1855 /* R_390_TLS_GD32 needs 2 consecutive GOT slots. */
1856 if (tls_type == GOT_TLS_GD)
1857 s->size += GOT_ENTRY_SIZE;
1858 dyn = htab->elf.dynamic_sections_created;
1859 /* R_390_TLS_IE32 needs one dynamic relocation,
1860 R_390_TLS_GD32 needs one if local symbol and two if global. */
1861 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1862 || tls_type >= GOT_TLS_IE)
1863 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1864 else if (tls_type == GOT_TLS_GD)
1865 htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rela);
1866 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1867 || h->root.type != bfd_link_hash_undefweak)
1868 && (info->shared
1869 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1870 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
1871 }
1872 else
1873 h->got.offset = (bfd_vma) -1;
1874
1875 if (eh->dyn_relocs == NULL)
1876 return TRUE;
1877
1878 /* In the shared -Bsymbolic case, discard space allocated for
1879 dynamic pc-relative relocs against symbols which turn out to be
1880 defined in regular objects. For the normal shared case, discard
1881 space for pc-relative relocs that have become local due to symbol
1882 visibility changes. */
1883
1884 if (info->shared)
1885 {
1886 if (SYMBOL_CALLS_LOCAL (info, h))
1887 {
1888 struct elf_dyn_relocs **pp;
1889
1890 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1891 {
1892 p->count -= p->pc_count;
1893 p->pc_count = 0;
1894 if (p->count == 0)
1895 *pp = p->next;
1896 else
1897 pp = &p->next;
1898 }
1899 }
1900
1901 /* Also discard relocs on undefined weak syms with non-default
1902 visibility. */
1903 if (eh->dyn_relocs != NULL
1904 && h->root.type == bfd_link_hash_undefweak)
1905 {
1906 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1907 eh->dyn_relocs = NULL;
1908
1909 /* Make sure undefined weak symbols are output as a dynamic
1910 symbol in PIEs. */
1911 else 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 }
1919 else if (ELIMINATE_COPY_RELOCS)
1920 {
1921 /* For the non-shared case, discard space for relocs against
1922 symbols which turn out to need copy relocs or are not
1923 dynamic. */
1924
1925 if (!h->non_got_ref
1926 && ((h->def_dynamic
1927 && !h->def_regular)
1928 || (htab->elf.dynamic_sections_created
1929 && (h->root.type == bfd_link_hash_undefweak
1930 || h->root.type == bfd_link_hash_undefined))))
1931 {
1932 /* Make sure this symbol is output as a dynamic symbol.
1933 Undefined weak syms won't yet be marked as dynamic. */
1934 if (h->dynindx == -1
1935 && !h->forced_local)
1936 {
1937 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1938 return FALSE;
1939 }
1940
1941 /* If that succeeded, we know we'll be keeping all the
1942 relocs. */
1943 if (h->dynindx != -1)
1944 goto keep;
1945 }
1946
1947 eh->dyn_relocs = NULL;
1948
1949 keep: ;
1950 }
1951
1952 /* Finally, allocate space. */
1953 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1954 {
1955 asection *sreloc = elf_section_data (p->sec)->sreloc;
1956
1957 sreloc->size += p->count * sizeof (Elf32_External_Rela);
1958 }
1959
1960 return TRUE;
1961 }
1962
1963 /* Find any dynamic relocs that apply to read-only sections. */
1964
1965 static bfd_boolean
1966 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1967 {
1968 struct elf_s390_link_hash_entry *eh;
1969 struct elf_dyn_relocs *p;
1970
1971 eh = (struct elf_s390_link_hash_entry *) h;
1972 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1973 {
1974 asection *s = p->sec->output_section;
1975
1976 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1977 {
1978 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1979
1980 info->flags |= DF_TEXTREL;
1981
1982 /* Not an error, just cut short the traversal. */
1983 return FALSE;
1984 }
1985 }
1986 return TRUE;
1987 }
1988
1989 /* Set the sizes of the dynamic sections. */
1990
1991 static bfd_boolean
1992 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1993 struct bfd_link_info *info)
1994 {
1995 struct elf_s390_link_hash_table *htab;
1996 bfd *dynobj;
1997 asection *s;
1998 bfd_boolean relocs;
1999 bfd *ibfd;
2000
2001 htab = elf_s390_hash_table (info);
2002 dynobj = htab->elf.dynobj;
2003 if (dynobj == NULL)
2004 abort ();
2005
2006 if (htab->elf.dynamic_sections_created)
2007 {
2008 /* Set the contents of the .interp section to the interpreter. */
2009 if (info->executable)
2010 {
2011 s = bfd_get_linker_section (dynobj, ".interp");
2012 if (s == NULL)
2013 abort ();
2014 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2015 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2016 }
2017 }
2018
2019 /* Set up .got offsets for local syms, and space for local dynamic
2020 relocs. */
2021 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
2022 {
2023 bfd_signed_vma *local_got;
2024 bfd_signed_vma *end_local_got;
2025 char *local_tls_type;
2026 bfd_size_type locsymcount;
2027 Elf_Internal_Shdr *symtab_hdr;
2028 asection *srela;
2029 struct plt_entry *local_plt;
2030 unsigned int i;
2031
2032 if (! is_s390_elf (ibfd))
2033 continue;
2034
2035 for (s = ibfd->sections; s != NULL; s = s->next)
2036 {
2037 struct elf_dyn_relocs *p;
2038
2039 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2040 {
2041 if (!bfd_is_abs_section (p->sec)
2042 && bfd_is_abs_section (p->sec->output_section))
2043 {
2044 /* Input section has been discarded, either because
2045 it is a copy of a linkonce section or due to
2046 linker script /DISCARD/, so we'll be discarding
2047 the relocs too. */
2048 }
2049 else if (p->count != 0)
2050 {
2051 srela = elf_section_data (p->sec)->sreloc;
2052 srela->size += p->count * sizeof (Elf32_External_Rela);
2053 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2054 info->flags |= DF_TEXTREL;
2055 }
2056 }
2057 }
2058
2059 local_got = elf_local_got_refcounts (ibfd);
2060 if (!local_got)
2061 continue;
2062
2063 symtab_hdr = &elf_symtab_hdr (ibfd);
2064 locsymcount = symtab_hdr->sh_info;
2065 end_local_got = local_got + locsymcount;
2066 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2067 s = htab->elf.sgot;
2068 srela = htab->elf.srelgot;
2069 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2070 {
2071 if (*local_got > 0)
2072 {
2073 *local_got = s->size;
2074 s->size += GOT_ENTRY_SIZE;
2075 if (*local_tls_type == GOT_TLS_GD)
2076 s->size += GOT_ENTRY_SIZE;
2077 if (info->shared)
2078 srela->size += sizeof (Elf32_External_Rela);
2079 }
2080 else
2081 *local_got = (bfd_vma) -1;
2082 }
2083 local_plt = elf_s390_local_plt (ibfd);
2084 for (i = 0; i < symtab_hdr->sh_info; i++)
2085 {
2086 if (local_plt[i].plt.refcount > 0)
2087 {
2088 local_plt[i].plt.offset = htab->elf.iplt->size;
2089 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2090 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2091 htab->elf.irelplt->size += RELA_ENTRY_SIZE;
2092 }
2093 else
2094 local_plt[i].plt.offset = (bfd_vma) -1;
2095 }
2096 }
2097
2098 if (htab->tls_ldm_got.refcount > 0)
2099 {
2100 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM32
2101 relocs. */
2102 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2103 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2104 htab->elf.srelgot->size += sizeof (Elf32_External_Rela);
2105 }
2106 else
2107 htab->tls_ldm_got.offset = -1;
2108
2109 /* Allocate global sym .plt and .got entries, and space for global
2110 sym dynamic relocs. */
2111 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2112
2113 /* We now have determined the sizes of the various dynamic sections.
2114 Allocate memory for them. */
2115 relocs = FALSE;
2116 for (s = dynobj->sections; s != NULL; s = s->next)
2117 {
2118 if ((s->flags & SEC_LINKER_CREATED) == 0)
2119 continue;
2120
2121 if (s == htab->elf.splt
2122 || s == htab->elf.sgot
2123 || s == htab->elf.sgotplt
2124 || s == htab->sdynbss
2125 || s == htab->elf.iplt
2126 || s == htab->elf.igotplt
2127 || s == htab->irelifunc)
2128 {
2129 /* Strip this section if we don't need it; see the
2130 comment below. */
2131 }
2132 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2133 {
2134 if (s->size != 0)
2135 relocs = TRUE;
2136
2137 /* We use the reloc_count field as a counter if we need
2138 to copy relocs into the output file. */
2139 s->reloc_count = 0;
2140 }
2141 else
2142 {
2143 /* It's not one of our sections, so don't allocate space. */
2144 continue;
2145 }
2146
2147 if (s->size == 0)
2148 {
2149 /* If we don't need this section, strip it from the
2150 output file. This is to handle .rela.bss and
2151 .rela.plt. We must create it in
2152 create_dynamic_sections, because it must be created
2153 before the linker maps input sections to output
2154 sections. The linker does that before
2155 adjust_dynamic_symbol is called, and it is that
2156 function which decides whether anything needs to go
2157 into these sections. */
2158
2159 s->flags |= SEC_EXCLUDE;
2160 continue;
2161 }
2162
2163 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2164 continue;
2165
2166 /* Allocate memory for the section contents. We use bfd_zalloc
2167 here in case unused entries are not reclaimed before the
2168 section's contents are written out. This should not happen,
2169 but this way if it does, we get a R_390_NONE reloc instead
2170 of garbage. */
2171 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2172 if (s->contents == NULL)
2173 return FALSE;
2174 }
2175
2176 if (htab->elf.dynamic_sections_created)
2177 {
2178 /* Add some entries to the .dynamic section. We fill in the
2179 values later, in elf_s390_finish_dynamic_sections, but we
2180 must add the entries now so that we get the correct size for
2181 the .dynamic section. The DT_DEBUG entry is filled in by the
2182 dynamic linker and used by the debugger. */
2183 #define add_dynamic_entry(TAG, VAL) \
2184 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2185
2186 if (info->executable)
2187 {
2188 if (!add_dynamic_entry (DT_DEBUG, 0))
2189 return FALSE;
2190 }
2191
2192 if (htab->elf.splt->size != 0)
2193 {
2194 if (!add_dynamic_entry (DT_PLTGOT, 0)
2195 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2196 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2197 || !add_dynamic_entry (DT_JMPREL, 0))
2198 return FALSE;
2199 }
2200
2201 if (relocs)
2202 {
2203 if (!add_dynamic_entry (DT_RELA, 0)
2204 || !add_dynamic_entry (DT_RELASZ, 0)
2205 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf32_External_Rela)))
2206 return FALSE;
2207
2208 /* If any dynamic relocs apply to a read-only section,
2209 then we need a DT_TEXTREL entry. */
2210 if ((info->flags & DF_TEXTREL) == 0)
2211 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, info);
2212
2213 if ((info->flags & DF_TEXTREL) != 0)
2214 {
2215 if (!add_dynamic_entry (DT_TEXTREL, 0))
2216 return FALSE;
2217 }
2218 }
2219 }
2220 #undef add_dynamic_entry
2221
2222 return TRUE;
2223 }
2224
2225 /* Return the base VMA address which should be subtracted from real addresses
2226 when resolving @dtpoff relocation.
2227 This is PT_TLS segment p_vaddr. */
2228
2229 static bfd_vma
2230 dtpoff_base (struct bfd_link_info *info)
2231 {
2232 /* If tls_sec is NULL, we should have signalled an error already. */
2233 if (elf_hash_table (info)->tls_sec == NULL)
2234 return 0;
2235 return elf_hash_table (info)->tls_sec->vma;
2236 }
2237
2238 /* Return the relocation value for @tpoff relocation
2239 if STT_TLS virtual address is ADDRESS. */
2240
2241 static bfd_vma
2242 tpoff (struct bfd_link_info *info, bfd_vma address)
2243 {
2244 struct elf_link_hash_table *htab = elf_hash_table (info);
2245
2246 /* If tls_sec is NULL, we should have signalled an error already. */
2247 if (htab->tls_sec == NULL)
2248 return 0;
2249 return htab->tls_size + htab->tls_sec->vma - address;
2250 }
2251
2252 /* Complain if TLS instruction relocation is against an invalid
2253 instruction. */
2254
2255 static void
2256 invalid_tls_insn (bfd *input_bfd,
2257 asection *input_section,
2258 Elf_Internal_Rela *rel)
2259 {
2260 reloc_howto_type *howto;
2261
2262 howto = elf_howto_table + ELF32_R_TYPE (rel->r_info);
2263 (*_bfd_error_handler)
2264 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2265 input_bfd,
2266 input_section,
2267 (long) rel->r_offset,
2268 howto->name);
2269 bfd_set_error (bfd_error_bad_value);
2270 }
2271
2272 /* Relocate a 390 ELF section. */
2273
2274 static bfd_boolean
2275 elf_s390_relocate_section (bfd *output_bfd,
2276 struct bfd_link_info *info,
2277 bfd *input_bfd,
2278 asection *input_section,
2279 bfd_byte *contents,
2280 Elf_Internal_Rela *relocs,
2281 Elf_Internal_Sym *local_syms,
2282 asection **local_sections)
2283 {
2284 struct elf_s390_link_hash_table *htab;
2285 Elf_Internal_Shdr *symtab_hdr;
2286 struct elf_link_hash_entry **sym_hashes;
2287 bfd_vma *local_got_offsets;
2288 Elf_Internal_Rela *rel;
2289 Elf_Internal_Rela *relend;
2290
2291 BFD_ASSERT (is_s390_elf (input_bfd));
2292
2293 htab = elf_s390_hash_table (info);
2294 symtab_hdr = &elf_symtab_hdr (input_bfd);
2295 sym_hashes = elf_sym_hashes (input_bfd);
2296 local_got_offsets = elf_local_got_offsets (input_bfd);
2297
2298 rel = relocs;
2299 relend = relocs + input_section->reloc_count;
2300 for (; rel < relend; rel++)
2301 {
2302 unsigned int r_type;
2303 reloc_howto_type *howto;
2304 unsigned long r_symndx;
2305 struct elf_link_hash_entry *h;
2306 Elf_Internal_Sym *sym;
2307 asection *sec;
2308 bfd_vma off;
2309 bfd_vma relocation;
2310 bfd_boolean unresolved_reloc;
2311 bfd_reloc_status_type r;
2312 int tls_type;
2313 asection *base_got = htab->elf.sgot;
2314
2315 r_type = ELF32_R_TYPE (rel->r_info);
2316 if (r_type == (int) R_390_GNU_VTINHERIT
2317 || r_type == (int) R_390_GNU_VTENTRY)
2318 continue;
2319 if (r_type >= (int) R_390_max)
2320 {
2321 bfd_set_error (bfd_error_bad_value);
2322 return FALSE;
2323 }
2324
2325 howto = elf_howto_table + r_type;
2326 r_symndx = ELF32_R_SYM (rel->r_info);
2327
2328 h = NULL;
2329 sym = NULL;
2330 sec = NULL;
2331 unresolved_reloc = FALSE;
2332 if (r_symndx < symtab_hdr->sh_info)
2333 {
2334 sym = local_syms + r_symndx;
2335 sec = local_sections[r_symndx];
2336 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2337 {
2338 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2339 if (local_plt == NULL)
2340 return FALSE;
2341
2342 /* Address of the PLT slot. */
2343 relocation = (htab->elf.iplt->output_section->vma
2344 + htab->elf.iplt->output_offset
2345 + local_plt[r_symndx].plt.offset);
2346
2347 switch (r_type)
2348 {
2349 case R_390_PLTOFF16:
2350 case R_390_PLTOFF32:
2351 relocation -= htab->elf.sgot->output_section->vma;
2352 break;
2353 case R_390_GOTPLT12:
2354 case R_390_GOTPLT16:
2355 case R_390_GOTPLT20:
2356 case R_390_GOTPLT32:
2357 case R_390_GOTPLTENT:
2358 case R_390_GOT12:
2359 case R_390_GOT16:
2360 case R_390_GOT20:
2361 case R_390_GOT32:
2362 case R_390_GOTENT:
2363 {
2364 /* Write the PLT slot address into the GOT slot. */
2365 bfd_put_32 (output_bfd, relocation,
2366 htab->elf.sgot->contents +
2367 local_got_offsets[r_symndx]);
2368 relocation = (local_got_offsets[r_symndx] +
2369 htab->elf.sgot->output_offset);
2370
2371 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2372 relocation += htab->elf.sgot->output_section->vma;
2373 break;
2374 }
2375 default:
2376 break;
2377 }
2378 /* The output section is needed later in
2379 finish_dynamic_section when creating the dynamic
2380 relocation. */
2381 local_plt[r_symndx].sec = sec;
2382 goto do_relocation;
2383 }
2384 else
2385 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2386 }
2387 else
2388 {
2389 bfd_boolean warned ATTRIBUTE_UNUSED;
2390
2391 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2392 r_symndx, symtab_hdr, sym_hashes,
2393 h, sec, relocation,
2394 unresolved_reloc, warned);
2395 }
2396
2397 if (sec != NULL && discarded_section (sec))
2398 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2399 rel, 1, relend, howto, 0, contents);
2400
2401 if (info->relocatable)
2402 continue;
2403
2404 switch (r_type)
2405 {
2406 case R_390_GOTPLT12:
2407 case R_390_GOTPLT16:
2408 case R_390_GOTPLT20:
2409 case R_390_GOTPLT32:
2410 case R_390_GOTPLTENT:
2411 /* There are three cases for a GOTPLT relocation. 1) The
2412 relocation is against the jump slot entry of a plt that
2413 will get emitted to the output file. 2) The relocation
2414 is against the jump slot of a plt entry that has been
2415 removed. elf_s390_adjust_gotplt has created a GOT entry
2416 as replacement. 3) The relocation is against a local symbol.
2417 Cases 2) and 3) are the same as the GOT relocation code
2418 so we just have to test for case 1 and fall through for
2419 the other two. */
2420 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2421 {
2422 bfd_vma plt_index;
2423
2424 if (s390_is_ifunc_symbol_p (h))
2425 {
2426 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2427 relocation = (plt_index * GOT_ENTRY_SIZE +
2428 htab->elf.igotplt->output_offset);
2429 if (r_type == R_390_GOTPLTENT)
2430 relocation += htab->elf.igotplt->output_section->vma;
2431 }
2432 else
2433 {
2434 /* Calc. index no.
2435 Current offset - size first entry / entry size. */
2436 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2437 PLT_ENTRY_SIZE;
2438
2439 /* Offset in GOT is PLT index plus GOT headers(3)
2440 times 4, addr & GOT addr. */
2441 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2442 if (r_type == R_390_GOTPLTENT)
2443 relocation += htab->elf.sgot->output_section->vma;
2444 }
2445 unresolved_reloc = FALSE;
2446
2447 }
2448 /* Fall through. */
2449
2450 case R_390_GOT12:
2451 case R_390_GOT16:
2452 case R_390_GOT20:
2453 case R_390_GOT32:
2454 case R_390_GOTENT:
2455 /* Relocation is to the entry for this symbol in the global
2456 offset table. */
2457 if (base_got == NULL)
2458 abort ();
2459
2460 if (h != NULL)
2461 {
2462 bfd_boolean dyn;
2463
2464 off = h->got.offset;
2465 dyn = htab->elf.dynamic_sections_created;
2466
2467 if (s390_is_ifunc_symbol_p (h))
2468 {
2469 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2470 if (off == (bfd_vma)-1)
2471 {
2472 /* No explicit GOT usage so redirect to the
2473 got.iplt slot. */
2474 base_got = htab->elf.igotplt;
2475 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2476 }
2477 else
2478 {
2479 /* Explicit GOT slots must contain the address
2480 of the PLT slot. This will be handled in
2481 finish_dynamic_symbol. */
2482 }
2483 }
2484 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2485 || (info->shared
2486 && SYMBOL_REFERENCES_LOCAL (info, h))
2487 || (ELF_ST_VISIBILITY (h->other)
2488 && h->root.type == bfd_link_hash_undefweak))
2489
2490 {
2491 /* This is actually a static link, or it is a
2492 -Bsymbolic link and the symbol is defined
2493 locally, or the symbol was forced to be local
2494 because of a version file. We must initialize
2495 this entry in the global offset table. Since the
2496 offset must always be a multiple of 2, we use the
2497 least significant bit to record whether we have
2498 initialized it already.
2499
2500 When doing a dynamic link, we create a .rel.got
2501 relocation entry to initialize the value. This
2502 is done in the finish_dynamic_symbol routine. */
2503 if ((off & 1) != 0)
2504 off &= ~1;
2505 else
2506 {
2507 bfd_put_32 (output_bfd, relocation,
2508 base_got->contents + off);
2509 h->got.offset |= 1;
2510 }
2511 }
2512 else
2513 unresolved_reloc = FALSE;
2514 }
2515 else
2516 {
2517 if (local_got_offsets == NULL)
2518 abort ();
2519
2520 off = local_got_offsets[r_symndx];
2521
2522 /* The offset must always be a multiple of 4. We use
2523 the least significant bit to record whether we have
2524 already generated the necessary reloc. */
2525 if ((off & 1) != 0)
2526 off &= ~1;
2527 else
2528 {
2529 bfd_put_32 (output_bfd, relocation,
2530 htab->elf.sgot->contents + off);
2531
2532 if (info->shared)
2533 {
2534 asection *srelgot;
2535 Elf_Internal_Rela outrel;
2536 bfd_byte *loc;
2537
2538 srelgot = htab->elf.srelgot;
2539 if (srelgot == NULL)
2540 abort ();
2541
2542 outrel.r_offset = (htab->elf.sgot->output_section->vma
2543 + htab->elf.sgot->output_offset
2544 + off);
2545 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2546 outrel.r_addend = relocation;
2547 loc = srelgot->contents;
2548 loc += srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
2549 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2550 }
2551
2552 local_got_offsets[r_symndx] |= 1;
2553 }
2554 }
2555
2556 if (off >= (bfd_vma) -2)
2557 abort ();
2558
2559 relocation = base_got->output_offset + off;
2560
2561 /* For @GOTENT the relocation is against the offset between
2562 the instruction and the symbols entry in the GOT and not
2563 between the start of the GOT and the symbols entry. We
2564 add the vma of the GOT to get the correct value. */
2565 if ( r_type == R_390_GOTENT
2566 || r_type == R_390_GOTPLTENT)
2567 relocation += base_got->output_section->vma;
2568
2569 break;
2570
2571 case R_390_GOTOFF16:
2572 case R_390_GOTOFF32:
2573 /* Relocation is relative to the start of the global offset
2574 table. */
2575
2576 /* Note that sgot->output_offset is not involved in this
2577 calculation. We always want the start of .got. If we
2578 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2579 permitted by the ABI, we might have to change this
2580 calculation. */
2581 relocation -= htab->elf.sgot->output_section->vma;
2582 break;
2583
2584 case R_390_GOTPC:
2585 case R_390_GOTPCDBL:
2586 /* Use global offset table as symbol value. */
2587 relocation = htab->elf.sgot->output_section->vma;
2588 unresolved_reloc = FALSE;
2589 break;
2590
2591 case R_390_PLT16DBL:
2592 case R_390_PLT32DBL:
2593 case R_390_PLT32:
2594 /* Relocation is to the entry for this symbol in the
2595 procedure linkage table. */
2596
2597 /* Resolve a PLT32 reloc against a local symbol directly,
2598 without using the procedure linkage table. */
2599 if (h == NULL)
2600 break;
2601
2602 if (h->plt.offset == (bfd_vma) -1
2603 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2604 {
2605 /* We didn't make a PLT entry for this symbol. This
2606 happens when statically linking PIC code, or when
2607 using -Bsymbolic. */
2608 break;
2609 }
2610
2611 if (s390_is_ifunc_symbol_p (h))
2612 relocation = (htab->elf.iplt->output_section->vma
2613 + htab->elf.iplt->output_offset
2614 + h->plt.offset);
2615 else
2616 relocation = (htab->elf.splt->output_section->vma
2617 + htab->elf.splt->output_offset
2618 + h->plt.offset);
2619 unresolved_reloc = FALSE;
2620 break;
2621
2622 case R_390_PLTOFF16:
2623 case R_390_PLTOFF32:
2624 /* Relocation is to the entry for this symbol in the
2625 procedure linkage table relative to the start of the GOT. */
2626
2627 /* For local symbols or if we didn't make a PLT entry for
2628 this symbol resolve the symbol directly. */
2629 if (h == NULL
2630 || h->plt.offset == (bfd_vma) -1
2631 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2632 {
2633 relocation -= htab->elf.sgot->output_section->vma;
2634 break;
2635 }
2636
2637 if (s390_is_ifunc_symbol_p (h))
2638 relocation = (htab->elf.iplt->output_section->vma
2639 + htab->elf.iplt->output_offset
2640 + h->plt.offset
2641 - htab->elf.sgot->output_section->vma);
2642 else
2643 relocation = (htab->elf.splt->output_section->vma
2644 + htab->elf.splt->output_offset
2645 + h->plt.offset
2646 - htab->elf.sgot->output_section->vma);
2647 unresolved_reloc = FALSE;
2648 break;
2649
2650 case R_390_8:
2651 case R_390_16:
2652 case R_390_32:
2653 case R_390_PC16:
2654 case R_390_PC16DBL:
2655 case R_390_PC32DBL:
2656 case R_390_PC32:
2657 if (h != NULL
2658 && s390_is_ifunc_symbol_p (h)
2659 && h->def_regular)
2660 {
2661 if (!info->shared || !h->non_got_ref)
2662 {
2663 /* For a non-shared object STT_GNU_IFUNC symbol must
2664 go through PLT. */
2665 relocation = (htab->elf.iplt->output_section->vma
2666 + htab->elf.iplt->output_offset
2667 + h ->plt.offset);
2668 goto do_relocation;
2669 }
2670 else
2671 {
2672 /* For shared objects a runtime relocation is needed. */
2673
2674 Elf_Internal_Rela outrel;
2675 asection *sreloc;
2676
2677 /* Need a dynamic relocation to get the real function
2678 address. */
2679 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2680 info,
2681 input_section,
2682 rel->r_offset);
2683 if (outrel.r_offset == (bfd_vma) -1
2684 || outrel.r_offset == (bfd_vma) -2)
2685 abort ();
2686
2687 outrel.r_offset += (input_section->output_section->vma
2688 + input_section->output_offset);
2689
2690 if (h->dynindx == -1
2691 || h->forced_local
2692 || info->executable)
2693 {
2694 /* This symbol is resolved locally. */
2695 outrel.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
2696 outrel.r_addend = (h->root.u.def.value
2697 + h->root.u.def.section->output_section->vma
2698 + h->root.u.def.section->output_offset);
2699 }
2700 else
2701 {
2702 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2703 outrel.r_addend = 0;
2704 }
2705
2706 sreloc = htab->elf.irelifunc;
2707 elf_append_rela (output_bfd, sreloc, &outrel);
2708
2709 /* If this reloc is against an external symbol, we
2710 do not want to fiddle with the addend. Otherwise,
2711 we need to include the symbol value so that it
2712 becomes an addend for the dynamic reloc. For an
2713 internal symbol, we have updated addend. */
2714 continue;
2715 }
2716 }
2717
2718 if ((input_section->flags & SEC_ALLOC) == 0)
2719 break;
2720
2721 if ((info->shared
2722 && (h == NULL
2723 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2724 || h->root.type != bfd_link_hash_undefweak)
2725 && ((r_type != R_390_PC16
2726 && r_type != R_390_PC16DBL
2727 && r_type != R_390_PC32DBL
2728 && r_type != R_390_PC32)
2729 || !SYMBOL_CALLS_LOCAL (info, h)))
2730 || (ELIMINATE_COPY_RELOCS
2731 && !info->shared
2732 && h != NULL
2733 && h->dynindx != -1
2734 && !h->non_got_ref
2735 && ((h->def_dynamic
2736 && !h->def_regular)
2737 || h->root.type == bfd_link_hash_undefweak
2738 || h->root.type == bfd_link_hash_undefined)))
2739 {
2740 Elf_Internal_Rela outrel;
2741 bfd_boolean skip, relocate;
2742 asection *sreloc;
2743 bfd_byte *loc;
2744
2745 /* When generating a shared object, these relocations
2746 are copied into the output file to be resolved at run
2747 time. */
2748
2749 skip = FALSE;
2750 relocate = FALSE;
2751
2752 outrel.r_offset =
2753 _bfd_elf_section_offset (output_bfd, info, input_section,
2754 rel->r_offset);
2755 if (outrel.r_offset == (bfd_vma) -1)
2756 skip = TRUE;
2757 else if (outrel.r_offset == (bfd_vma) -2)
2758 skip = TRUE, relocate = TRUE;
2759 outrel.r_offset += (input_section->output_section->vma
2760 + input_section->output_offset);
2761
2762 if (skip)
2763 memset (&outrel, 0, sizeof outrel);
2764 else if (h != NULL
2765 && h->dynindx != -1
2766 && (r_type == R_390_PC16
2767 || r_type == R_390_PC16DBL
2768 || r_type == R_390_PC32DBL
2769 || r_type == R_390_PC32
2770 || !info->shared
2771 || !SYMBOLIC_BIND (info, h)
2772 || !h->def_regular))
2773 {
2774 outrel.r_info = ELF32_R_INFO (h->dynindx, r_type);
2775 outrel.r_addend = rel->r_addend;
2776 }
2777 else
2778 {
2779 /* This symbol is local, or marked to become local. */
2780 outrel.r_addend = relocation + rel->r_addend;
2781 if (r_type == R_390_32)
2782 {
2783 relocate = TRUE;
2784 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2785 }
2786 else
2787 {
2788 long sindx;
2789
2790 if (bfd_is_abs_section (sec))
2791 sindx = 0;
2792 else if (sec == NULL || sec->owner == NULL)
2793 {
2794 bfd_set_error(bfd_error_bad_value);
2795 return FALSE;
2796 }
2797 else
2798 {
2799 asection *osec;
2800
2801 osec = sec->output_section;
2802 sindx = elf_section_data (osec)->dynindx;
2803 if (sindx == 0)
2804 {
2805 osec = htab->elf.text_index_section;
2806 sindx = elf_section_data (osec)->dynindx;
2807 }
2808 BFD_ASSERT (sindx != 0);
2809
2810 /* We are turning this relocation into one
2811 against a section symbol, so subtract out
2812 the output section's address but not the
2813 offset of the input section in the output
2814 section. */
2815 outrel.r_addend -= osec->vma;
2816 }
2817 outrel.r_info = ELF32_R_INFO (sindx, r_type);
2818 }
2819 }
2820
2821 sreloc = elf_section_data (input_section)->sreloc;
2822 if (sreloc == NULL)
2823 abort ();
2824
2825 loc = sreloc->contents;
2826 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2827 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2828
2829 /* If this reloc is against an external symbol, we do
2830 not want to fiddle with the addend. Otherwise, we
2831 need to include the symbol value so that it becomes
2832 an addend for the dynamic reloc. */
2833 if (! relocate)
2834 continue;
2835 }
2836 break;
2837
2838 /* Relocations for tls literal pool entries. */
2839 case R_390_TLS_IE32:
2840 if (info->shared)
2841 {
2842 Elf_Internal_Rela outrel;
2843 asection *sreloc;
2844 bfd_byte *loc;
2845
2846 outrel.r_offset = rel->r_offset
2847 + input_section->output_section->vma
2848 + input_section->output_offset;
2849 outrel.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
2850 sreloc = elf_section_data (input_section)->sreloc;
2851 if (sreloc == NULL)
2852 abort ();
2853 loc = sreloc->contents;
2854 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
2855 bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc);
2856 }
2857 /* Fall through. */
2858
2859 case R_390_TLS_GD32:
2860 case R_390_TLS_GOTIE32:
2861 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2862 tls_type = GOT_UNKNOWN;
2863 if (h == NULL && local_got_offsets)
2864 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2865 else if (h != NULL)
2866 {
2867 tls_type = elf_s390_hash_entry(h)->tls_type;
2868 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2869 r_type = R_390_TLS_LE32;
2870 }
2871 if (r_type == R_390_TLS_GD32 && tls_type >= GOT_TLS_IE)
2872 r_type = R_390_TLS_IE32;
2873
2874 if (r_type == R_390_TLS_LE32)
2875 {
2876 /* This relocation gets optimized away by the local exec
2877 access optimization. */
2878 BFD_ASSERT (! unresolved_reloc);
2879 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2880 contents + rel->r_offset);
2881 continue;
2882 }
2883
2884 if (htab->elf.sgot == NULL)
2885 abort ();
2886
2887 if (h != NULL)
2888 off = h->got.offset;
2889 else
2890 {
2891 if (local_got_offsets == NULL)
2892 abort ();
2893
2894 off = local_got_offsets[r_symndx];
2895 }
2896
2897 emit_tls_relocs:
2898
2899 if ((off & 1) != 0)
2900 off &= ~1;
2901 else
2902 {
2903 Elf_Internal_Rela outrel;
2904 bfd_byte *loc;
2905 int dr_type, indx;
2906
2907 if (htab->elf.srelgot == NULL)
2908 abort ();
2909
2910 outrel.r_offset = (htab->elf.sgot->output_section->vma
2911 + htab->elf.sgot->output_offset + off);
2912
2913 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2914 if (r_type == R_390_TLS_GD32)
2915 dr_type = R_390_TLS_DTPMOD;
2916 else
2917 dr_type = R_390_TLS_TPOFF;
2918 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2919 outrel.r_addend = relocation - dtpoff_base (info);
2920 else
2921 outrel.r_addend = 0;
2922 outrel.r_info = ELF32_R_INFO (indx, dr_type);
2923 loc = htab->elf.srelgot->contents;
2924 loc += htab->elf.srelgot->reloc_count++
2925 * sizeof (Elf32_External_Rela);
2926 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2927
2928 if (r_type == R_390_TLS_GD32)
2929 {
2930 if (indx == 0)
2931 {
2932 BFD_ASSERT (! unresolved_reloc);
2933 bfd_put_32 (output_bfd,
2934 relocation - dtpoff_base (info),
2935 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2936 }
2937 else
2938 {
2939 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_DTPOFF);
2940 outrel.r_offset += GOT_ENTRY_SIZE;
2941 outrel.r_addend = 0;
2942 htab->elf.srelgot->reloc_count++;
2943 loc += sizeof (Elf32_External_Rela);
2944 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
2945 }
2946 }
2947
2948 if (h != NULL)
2949 h->got.offset |= 1;
2950 else
2951 local_got_offsets[r_symndx] |= 1;
2952 }
2953
2954 if (off >= (bfd_vma) -2)
2955 abort ();
2956 if (r_type == ELF32_R_TYPE (rel->r_info))
2957 {
2958 relocation = htab->elf.sgot->output_offset + off;
2959 if (r_type == R_390_TLS_IE32 || r_type == R_390_TLS_IEENT)
2960 relocation += htab->elf.sgot->output_section->vma;
2961 unresolved_reloc = FALSE;
2962 }
2963 else
2964 {
2965 bfd_put_32 (output_bfd, htab->elf.sgot->output_offset + off,
2966 contents + rel->r_offset);
2967 continue;
2968 }
2969 break;
2970
2971 case R_390_TLS_GOTIE12:
2972 case R_390_TLS_GOTIE20:
2973 case R_390_TLS_IEENT:
2974 if (h == NULL)
2975 {
2976 if (local_got_offsets == NULL)
2977 abort();
2978 off = local_got_offsets[r_symndx];
2979 if (info->shared)
2980 goto emit_tls_relocs;
2981 }
2982 else
2983 {
2984 off = h->got.offset;
2985 tls_type = elf_s390_hash_entry(h)->tls_type;
2986 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2987 goto emit_tls_relocs;
2988 }
2989
2990 if (htab->elf.sgot == NULL)
2991 abort ();
2992
2993 BFD_ASSERT (! unresolved_reloc);
2994 bfd_put_32 (output_bfd, -tpoff (info, relocation),
2995 htab->elf.sgot->contents + off);
2996 relocation = htab->elf.sgot->output_offset + off;
2997 if (r_type == R_390_TLS_IEENT)
2998 relocation += htab->elf.sgot->output_section->vma;
2999 unresolved_reloc = FALSE;
3000 break;
3001
3002 case R_390_TLS_LDM32:
3003 if (! info->shared)
3004 /* The literal pool entry this relocation refers to gets ignored
3005 by the optimized code of the local exec model. Do nothing
3006 and the value will turn out zero. */
3007 continue;
3008
3009 if (htab->elf.sgot == NULL)
3010 abort ();
3011
3012 off = htab->tls_ldm_got.offset;
3013 if (off & 1)
3014 off &= ~1;
3015 else
3016 {
3017 Elf_Internal_Rela outrel;
3018 bfd_byte *loc;
3019
3020 if (htab->elf.srelgot == NULL)
3021 abort ();
3022
3023 outrel.r_offset = (htab->elf.sgot->output_section->vma
3024 + htab->elf.sgot->output_offset + off);
3025
3026 bfd_put_32 (output_bfd, 0,
3027 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3028 outrel.r_info = ELF32_R_INFO (0, R_390_TLS_DTPMOD);
3029 outrel.r_addend = 0;
3030 loc = htab->elf.srelgot->contents;
3031 loc += htab->elf.srelgot->reloc_count++
3032 * sizeof (Elf32_External_Rela);
3033 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3034 htab->tls_ldm_got.offset |= 1;
3035 }
3036 relocation = htab->elf.sgot->output_offset + off;
3037 unresolved_reloc = FALSE;
3038 break;
3039
3040 case R_390_TLS_LE32:
3041 if (info->shared)
3042 {
3043 /* Linking a shared library with non-fpic code requires
3044 a R_390_TLS_TPOFF relocation. */
3045 Elf_Internal_Rela outrel;
3046 asection *sreloc;
3047 bfd_byte *loc;
3048 int indx;
3049
3050 outrel.r_offset = rel->r_offset
3051 + input_section->output_section->vma
3052 + input_section->output_offset;
3053 if (h != NULL && h->dynindx != -1)
3054 indx = h->dynindx;
3055 else
3056 indx = 0;
3057 outrel.r_info = ELF32_R_INFO (indx, R_390_TLS_TPOFF);
3058 if (indx == 0)
3059 outrel.r_addend = relocation - dtpoff_base (info);
3060 else
3061 outrel.r_addend = 0;
3062 sreloc = elf_section_data (input_section)->sreloc;
3063 if (sreloc == NULL)
3064 abort ();
3065 loc = sreloc->contents;
3066 loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rela);
3067 bfd_elf32_swap_reloca_out (output_bfd, &outrel, loc);
3068 }
3069 else
3070 {
3071 BFD_ASSERT (! unresolved_reloc);
3072 bfd_put_32 (output_bfd, -tpoff (info, relocation),
3073 contents + rel->r_offset);
3074 }
3075 continue;
3076
3077 case R_390_TLS_LDO32:
3078 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3079 relocation -= dtpoff_base (info);
3080 else
3081 /* When converting LDO to LE, we must negate. */
3082 relocation = -tpoff (info, relocation);
3083 break;
3084
3085 /* Relocations for tls instructions. */
3086 case R_390_TLS_LOAD:
3087 case R_390_TLS_GDCALL:
3088 case R_390_TLS_LDCALL:
3089 tls_type = GOT_UNKNOWN;
3090 if (h == NULL && local_got_offsets)
3091 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3092 else if (h != NULL)
3093 tls_type = elf_s390_hash_entry(h)->tls_type;
3094
3095 if (tls_type == GOT_TLS_GD)
3096 continue;
3097
3098 if (r_type == R_390_TLS_LOAD)
3099 {
3100 if (!info->shared && (h == NULL || h->dynindx == -1))
3101 {
3102 /* IE->LE transition. Four valid cases:
3103 l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0
3104 l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0
3105 l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0
3106 l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3107 unsigned int insn, ry;
3108
3109 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3110 ry = 0;
3111 if ((insn & 0xff00f000) == 0x58000000)
3112 /* l %rx,0(%ry,0) -> lr %rx,%ry + bcr 0,0 */
3113 ry = (insn & 0x000f0000);
3114 else if ((insn & 0xff0f0000) == 0x58000000)
3115 /* l %rx,0(0,%ry) -> lr %rx,%ry + bcr 0,0 */
3116 ry = (insn & 0x0000f000) << 4;
3117 else if ((insn & 0xff00f000) == 0x5800c000)
3118 /* l %rx,0(%ry,%r12) -> lr %rx,%ry + bcr 0,0 */
3119 ry = (insn & 0x000f0000);
3120 else if ((insn & 0xff0f0000) == 0x580c0000)
3121 /* l %rx,0(%r12,%ry) -> lr %rx,%ry + bcr 0,0 */
3122 ry = (insn & 0x0000f000) << 4;
3123 else
3124 invalid_tls_insn (input_bfd, input_section, rel);
3125 insn = 0x18000700 | (insn & 0x00f00000) | ry;
3126 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3127 }
3128 }
3129 else if (r_type == R_390_TLS_GDCALL)
3130 {
3131 unsigned int insn;
3132
3133 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3134 if ((insn & 0xff000fff) != 0x4d000000 &&
3135 (insn & 0xffff0000) != 0xc0e50000 &&
3136 (insn & 0xff000000) != 0x0d000000)
3137 invalid_tls_insn (input_bfd, input_section, rel);
3138 if (!info->shared && (h == NULL || h->dynindx == -1))
3139 {
3140 if ((insn & 0xff000000) == 0x0d000000)
3141 {
3142 /* GD->LE transition.
3143 basr rx, ry -> nopr r7 */
3144 insn = 0x07070000 | (insn & 0xffff);
3145 }
3146 else if ((insn & 0xff000000) == 0x4d000000)
3147 {
3148 /* GD->LE transition.
3149 bas %r14,0(%rx,%r13) -> bc 0,0 */
3150 insn = 0x47000000;
3151 }
3152 else
3153 {
3154 /* GD->LE transition.
3155 brasl %r14,_tls_get_offset@plt -> brcl 0,. */
3156 insn = 0xc0040000;
3157 bfd_put_16 (output_bfd, 0x0000,
3158 contents + rel->r_offset + 4);
3159 }
3160 }
3161 else
3162 {
3163 /* If basr is used in the pic case to invoke
3164 _tls_get_offset, something went wrong before. */
3165 if ((insn & 0xff000000) == 0x0d000000)
3166 invalid_tls_insn (input_bfd, input_section, rel);
3167
3168 if ((insn & 0xff000000) == 0x4d000000)
3169 {
3170 /* GD->IE transition.
3171 bas %r14,0(%rx,%r13) -> l %r2,0(%r2,%r12) */
3172 insn = 0x5822c000;
3173 }
3174 else
3175 {
3176 /* GD->IE transition.
3177 brasl %r14,__tls_get_addr@plt ->
3178 l %r2,0(%r2,%r12) ; bcr 0,0 */
3179 insn = 0x5822c000;
3180 bfd_put_16 (output_bfd, 0x0700,
3181 contents + rel->r_offset + 4);
3182 }
3183 }
3184 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3185 }
3186 else if (r_type == R_390_TLS_LDCALL)
3187 {
3188 if (!info->shared)
3189 {
3190 unsigned int insn;
3191
3192 insn = bfd_get_32 (input_bfd, contents + rel->r_offset);
3193 if ((insn & 0xff000fff) != 0x4d000000 &&
3194 (insn & 0xffff0000) != 0xc0e50000 &&
3195 (insn & 0xff000000) != 0x0d000000)
3196 invalid_tls_insn (input_bfd, input_section, rel);
3197
3198 if ((insn & 0xff000000) == 0x0d000000)
3199 {
3200 /* LD->LE transition.
3201 basr rx, ry -> nopr r7 */
3202 insn = 0x07070000 | (insn & 0xffff);
3203 }
3204 else if ((insn & 0xff000000) == 0x4d000000)
3205 {
3206 /* LD->LE transition.
3207 bas %r14,0(%rx,%r13) -> bc 0,0 */
3208 insn = 0x47000000;
3209 }
3210 else
3211 {
3212 /* LD->LE transition.
3213 brasl %r14,__tls_get_offset@plt -> brcl 0,. */
3214 insn = 0xc0040000;
3215 bfd_put_16 (output_bfd, 0x0000,
3216 contents + rel->r_offset + 4);
3217 }
3218 bfd_put_32 (output_bfd, insn, contents + rel->r_offset);
3219 }
3220 }
3221 continue;
3222
3223 default:
3224 break;
3225 }
3226
3227 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3228 because such sections are not SEC_ALLOC and thus ld.so will
3229 not process them. */
3230 if (unresolved_reloc
3231 && !((input_section->flags & SEC_DEBUGGING) != 0
3232 && h->def_dynamic)
3233 && _bfd_elf_section_offset (output_bfd, info, input_section,
3234 rel->r_offset) != (bfd_vma) -1)
3235 (*_bfd_error_handler)
3236 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3237 input_bfd,
3238 input_section,
3239 (long) rel->r_offset,
3240 howto->name,
3241 h->root.root.string);
3242
3243 do_relocation:
3244
3245 if (r_type == R_390_20
3246 || r_type == R_390_GOT20
3247 || r_type == R_390_GOTPLT20
3248 || r_type == R_390_TLS_GOTIE20)
3249 {
3250 relocation += rel->r_addend;
3251 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3252 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3253 contents, rel->r_offset,
3254 relocation, 0);
3255 }
3256 else
3257 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3258 contents, rel->r_offset,
3259 relocation, rel->r_addend);
3260
3261 if (r != bfd_reloc_ok)
3262 {
3263 const char *name;
3264
3265 if (h != NULL)
3266 name = h->root.root.string;
3267 else
3268 {
3269 name = bfd_elf_string_from_elf_section (input_bfd,
3270 symtab_hdr->sh_link,
3271 sym->st_name);
3272 if (name == NULL)
3273 return FALSE;
3274 if (*name == '\0')
3275 name = bfd_section_name (input_bfd, sec);
3276 }
3277
3278 if (r == bfd_reloc_overflow)
3279 {
3280
3281 if (! ((*info->callbacks->reloc_overflow)
3282 (info, (h ? &h->root : NULL), name, howto->name,
3283 (bfd_vma) 0, input_bfd, input_section,
3284 rel->r_offset)))
3285 return FALSE;
3286 }
3287 else
3288 {
3289 (*_bfd_error_handler)
3290 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3291 input_bfd, input_section,
3292 (long) rel->r_offset, name, (int) r);
3293 return FALSE;
3294 }
3295 }
3296 }
3297
3298 return TRUE;
3299 }
3300
3301 /* Generate the PLT slots together with the dynamic relocations needed
3302 for IFUNC symbols. */
3303
3304 static void
3305 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3306 struct bfd_link_info *info,
3307 struct elf_link_hash_entry *h,
3308 struct elf_s390_link_hash_table *htab,
3309 bfd_vma iplt_offset,
3310 bfd_vma resolver_address)
3311 {
3312 bfd_vma iplt_index;
3313 bfd_vma got_offset;
3314 bfd_vma igotiplt_offset;
3315 Elf_Internal_Rela rela;
3316 bfd_byte *loc;
3317 asection *plt, *gotplt, *relplt;
3318 bfd_vma relative_offset;
3319
3320 if (htab->elf.iplt == NULL
3321 || htab->elf.igotplt == NULL
3322 || htab->elf.irelplt == NULL)
3323 abort ();
3324
3325 gotplt = htab->elf.igotplt;
3326 relplt = htab->elf.irelplt;
3327
3328 /* Index of the PLT slot within iplt section. */
3329 iplt_index = iplt_offset / PLT_ENTRY_SIZE;
3330 plt = htab->elf.iplt;
3331 /* Offset into the igot.plt section. */
3332 igotiplt_offset = iplt_index * GOT_ENTRY_SIZE;
3333 /* Offset into the got section. */
3334 got_offset = igotiplt_offset + gotplt->output_offset;
3335
3336 /* S390 uses halfwords for relative branch calc! */
3337 relative_offset = - (plt->output_offset +
3338 (PLT_ENTRY_SIZE * iplt_index) + 18) / 2;
3339 /* If offset is > 32768, branch to a previous branch
3340 390 can only handle +-64 K jumps. */
3341 if ( -32768 > (int) relative_offset )
3342 relative_offset
3343 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3344
3345 /* Fill in the entry in the procedure linkage table. */
3346 if (!info->shared)
3347 {
3348 memcpy (plt->contents + iplt_offset, elf_s390_plt_entry,
3349 PLT_ENTRY_SIZE);
3350
3351 /* Adjust jump to the first plt entry. */
3352 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3353 plt->contents + iplt_offset + 20);
3354
3355 /* Push the GOT offset field. */
3356 bfd_put_32 (output_bfd,
3357 (gotplt->output_section->vma
3358 + got_offset),
3359 plt->contents + iplt_offset + 24);
3360 }
3361 else if (got_offset < 4096)
3362 {
3363 /* The GOT offset is small enough to be used directly as
3364 displacement. */
3365 memcpy (plt->contents + iplt_offset,
3366 elf_s390_plt_pic12_entry,
3367 PLT_ENTRY_SIZE);
3368
3369 /* Put in the GOT offset as displacement value. The 0xc000
3370 value comes from the first word of the plt entry. Look
3371 at the elf_s390_plt_pic16_entry content. */
3372 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3373 plt->contents + iplt_offset + 2);
3374
3375 /* Adjust the jump to the first plt entry. */
3376 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3377 plt->contents + iplt_offset + 20);
3378 }
3379 else if (got_offset < 32768)
3380 {
3381 /* The GOT offset is too big for a displacement but small
3382 enough to be a signed 16 bit immediate value as it can be
3383 used in an lhi instruction. */
3384 memcpy (plt->contents + iplt_offset,
3385 elf_s390_plt_pic16_entry,
3386 PLT_ENTRY_SIZE);
3387
3388 /* Put in the GOT offset for the lhi instruction. */
3389 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3390 plt->contents + iplt_offset + 2);
3391
3392 /* Adjust the jump to the first plt entry. */
3393 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3394 plt->contents + iplt_offset + 20);
3395 }
3396 else
3397 {
3398 memcpy (plt->contents + iplt_offset,
3399 elf_s390_plt_pic_entry,
3400 PLT_ENTRY_SIZE);
3401
3402 /* Adjust the jump to the first plt entry. */
3403 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3404 plt->contents + iplt_offset + 20);
3405
3406 /* Push the GOT offset field. */
3407 bfd_put_32 (output_bfd, got_offset,
3408 plt->contents + iplt_offset + 24);
3409 }
3410 /* Insert offset into reloc. table here. */
3411 bfd_put_32 (output_bfd, relplt->output_offset +
3412 iplt_index * RELA_ENTRY_SIZE,
3413 plt->contents + iplt_offset + 28);
3414
3415 /* Fill in the entry in the global offset table.
3416 Points to instruction after GOT offset. */
3417 bfd_put_32 (output_bfd,
3418 (plt->output_section->vma
3419 + plt->output_offset
3420 + iplt_offset
3421 + 12),
3422 gotplt->contents + igotiplt_offset);
3423
3424 /* Fill in the entry in the .rela.plt section. */
3425 rela.r_offset = gotplt->output_section->vma + got_offset;
3426
3427 if (!h
3428 || h->dynindx == -1
3429 || ((info->executable
3430 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3431 && h->def_regular))
3432 {
3433 /* The symbol can be locally resolved. */
3434 rela.r_info = ELF32_R_INFO (0, R_390_IRELATIVE);
3435 rela.r_addend = resolver_address;
3436 }
3437 else
3438 {
3439 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3440 rela.r_addend = 0;
3441 }
3442
3443 loc = relplt->contents + iplt_index * RELA_ENTRY_SIZE;
3444 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3445 }
3446
3447 /* Finish up dynamic symbol handling. We set the contents of various
3448 dynamic sections here. */
3449
3450 static bfd_boolean
3451 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3452 struct bfd_link_info *info,
3453 struct elf_link_hash_entry *h,
3454 Elf_Internal_Sym *sym)
3455 {
3456 struct elf_s390_link_hash_table *htab;
3457 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3458
3459 htab = elf_s390_hash_table (info);
3460
3461 if (h->plt.offset != (bfd_vma) -1)
3462 {
3463 bfd_vma plt_index;
3464 bfd_vma got_offset;
3465 Elf_Internal_Rela rela;
3466 bfd_byte *loc;
3467 bfd_vma relative_offset;
3468
3469 /* This symbol has an entry in the procedure linkage table. Set
3470 it up. */
3471 if (s390_is_ifunc_symbol_p (h))
3472 {
3473 /* If we can resolve the IFUNC symbol locally we generate an
3474 IRELATIVE reloc. */
3475 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3476 eh->ifunc_resolver_address +
3477 eh->ifunc_resolver_section->output_offset +
3478 eh->ifunc_resolver_section->output_section->vma);
3479 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3480 symbols is below. */
3481 }
3482 else
3483 {
3484 if (h->dynindx == -1
3485 || htab->elf.splt == NULL
3486 || htab->elf.sgotplt == NULL
3487 || htab->elf.srelplt == NULL)
3488 abort ();
3489
3490 /* Calc. index no.
3491 Current offset - size first entry / entry size. */
3492 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3493
3494 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
3495 addr & GOT addr. */
3496 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3497
3498 /* S390 uses halfwords for relative branch calc! */
3499 relative_offset = - ((PLT_FIRST_ENTRY_SIZE +
3500 (PLT_ENTRY_SIZE * plt_index) + 18) / 2);
3501 /* If offset is > 32768, branch to a previous branch
3502 390 can only handle +-64 K jumps. */
3503 if ( -32768 > (int) relative_offset )
3504 relative_offset
3505 = -(unsigned) (((65536 / PLT_ENTRY_SIZE - 1) * PLT_ENTRY_SIZE) / 2);
3506
3507 /* Fill in the entry in the procedure linkage table. */
3508 if (!info->shared)
3509 {
3510 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390_plt_entry,
3511 PLT_ENTRY_SIZE);
3512
3513 /* Adjust jump to the first plt entry. */
3514 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3515 htab->elf.splt->contents + h->plt.offset + 20);
3516
3517 /* Push the GOT offset field. */
3518 bfd_put_32 (output_bfd,
3519 (htab->elf.sgotplt->output_section->vma
3520 + htab->elf.sgotplt->output_offset
3521 + got_offset),
3522 htab->elf.splt->contents + h->plt.offset + 24);
3523 }
3524 else if (got_offset < 4096)
3525 {
3526 /* The GOT offset is small enough to be used directly as
3527 displacement. */
3528 memcpy (htab->elf.splt->contents + h->plt.offset,
3529 elf_s390_plt_pic12_entry,
3530 PLT_ENTRY_SIZE);
3531
3532 /* Put in the GOT offset as displacement value. The 0xc000
3533 value comes from the first word of the plt entry. Look
3534 at the elf_s390_plt_pic16_entry content. */
3535 bfd_put_16 (output_bfd, (bfd_vma)0xc000 | got_offset,
3536 htab->elf.splt->contents + h->plt.offset + 2);
3537
3538 /* Adjust the jump to the first plt entry. */
3539 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3540 htab->elf.splt->contents + h->plt.offset + 20);
3541 }
3542 else if (got_offset < 32768)
3543 {
3544 /* The GOT offset is too big for a displacement but small
3545 enough to be a signed 16 bit immediate value as it can be
3546 used in an lhi instruction. */
3547 memcpy (htab->elf.splt->contents + h->plt.offset,
3548 elf_s390_plt_pic16_entry,
3549 PLT_ENTRY_SIZE);
3550
3551 /* Put in the GOT offset for the lhi instruction. */
3552 bfd_put_16 (output_bfd, (bfd_vma)got_offset,
3553 htab->elf.splt->contents + h->plt.offset + 2);
3554
3555 /* Adjust the jump to the first plt entry. */
3556 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3557 htab->elf.splt->contents + h->plt.offset + 20);
3558 }
3559 else
3560 {
3561 memcpy (htab->elf.splt->contents + h->plt.offset,
3562 elf_s390_plt_pic_entry,
3563 PLT_ENTRY_SIZE);
3564
3565 /* Adjust the jump to the first plt entry. */
3566 bfd_put_32 (output_bfd, (bfd_vma) 0+(relative_offset << 16),
3567 htab->elf.splt->contents + h->plt.offset + 20);
3568
3569 /* Push the GOT offset field. */
3570 bfd_put_32 (output_bfd, got_offset,
3571 htab->elf.splt->contents + h->plt.offset + 24);
3572 }
3573 /* Insert offset into reloc. table here. */
3574 bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rela),
3575 htab->elf.splt->contents + h->plt.offset + 28);
3576
3577 /* Fill in the entry in the global offset table.
3578 Points to instruction after GOT offset. */
3579 bfd_put_32 (output_bfd,
3580 (htab->elf.splt->output_section->vma
3581 + htab->elf.splt->output_offset
3582 + h->plt.offset
3583 + 12),
3584 htab->elf.sgotplt->contents + got_offset);
3585
3586 /* Fill in the entry in the .rela.plt section. */
3587 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3588 + htab->elf.sgotplt->output_offset
3589 + got_offset);
3590 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_JMP_SLOT);
3591 rela.r_addend = 0;
3592 loc = htab->elf.srelplt->contents + plt_index * sizeof (Elf32_External_Rela);
3593 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3594
3595 if (!h->def_regular)
3596 {
3597 /* Mark the symbol as undefined, rather than as defined in
3598 the .plt section. Leave the value alone. This is a clue
3599 for the dynamic linker, to make function pointer
3600 comparisons work between an application and shared
3601 library. */
3602 sym->st_shndx = SHN_UNDEF;
3603 }
3604 }
3605 }
3606
3607 if (h->got.offset != (bfd_vma) -1
3608 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3609 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3610 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3611 {
3612 Elf_Internal_Rela rela;
3613 bfd_byte *loc;
3614
3615 /* This symbol has an entry in the global offset table. Set it
3616 up. */
3617
3618 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3619 abort ();
3620
3621 rela.r_offset = (htab->elf.sgot->output_section->vma
3622 + htab->elf.sgot->output_offset
3623 + (h->got.offset &~ (bfd_vma) 1));
3624
3625 /* If this is a static link, or it is a -Bsymbolic link and the
3626 symbol is defined locally or was forced to be local because
3627 of a version file, we just want to emit a RELATIVE reloc.
3628 The entry in the global offset table will already have been
3629 initialized in the relocate_section function. */
3630 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3631 {
3632 if (info->shared)
3633 {
3634 /* An explicit GOT slot usage needs GLOB_DAT. If the
3635 symbol references local the implicit got.iplt slot
3636 will be used and the IRELATIVE reloc has been created
3637 above. */
3638 goto do_glob_dat;
3639 }
3640 else
3641 {
3642 /* For non-shared objects explicit GOT slots must be
3643 filled with the PLT slot address for pointer
3644 equality reasons. */
3645 bfd_put_32 (output_bfd, (htab->elf.iplt->output_section->vma
3646 + htab->elf.iplt->output_offset
3647 + h->plt.offset),
3648 htab->elf.sgot->contents + h->got.offset);
3649 return TRUE;
3650 }
3651 }
3652 else if (info->shared
3653 && SYMBOL_REFERENCES_LOCAL (info, h))
3654 {
3655 /* If this is a static link, or it is a -Bsymbolic link and
3656 the symbol is defined locally or was forced to be local
3657 because of a version file, we just want to emit a
3658 RELATIVE reloc. The entry in the global offset table
3659 will already have been initialized in the
3660 relocate_section function. */
3661 if (!h->def_regular)
3662 return FALSE;
3663 BFD_ASSERT((h->got.offset & 1) != 0);
3664 rela.r_info = ELF32_R_INFO (0, R_390_RELATIVE);
3665 rela.r_addend = (h->root.u.def.value
3666 + h->root.u.def.section->output_section->vma
3667 + h->root.u.def.section->output_offset);
3668 }
3669 else
3670 {
3671 BFD_ASSERT((h->got.offset & 1) == 0);
3672 do_glob_dat:
3673 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3674 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_GLOB_DAT);
3675 rela.r_addend = 0;
3676 }
3677
3678 loc = htab->elf.srelgot->contents;
3679 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rela);
3680 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3681 }
3682
3683 if (h->needs_copy)
3684 {
3685 Elf_Internal_Rela rela;
3686 bfd_byte *loc;
3687
3688 /* This symbols needs a copy reloc. Set it up. */
3689
3690 if (h->dynindx == -1
3691 || (h->root.type != bfd_link_hash_defined
3692 && h->root.type != bfd_link_hash_defweak)
3693 || htab->srelbss == NULL)
3694 abort ();
3695
3696 rela.r_offset = (h->root.u.def.value
3697 + h->root.u.def.section->output_section->vma
3698 + h->root.u.def.section->output_offset);
3699 rela.r_info = ELF32_R_INFO (h->dynindx, R_390_COPY);
3700 rela.r_addend = 0;
3701 loc = htab->srelbss->contents;
3702 loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rela);
3703 bfd_elf32_swap_reloca_out (output_bfd, &rela, loc);
3704 }
3705
3706 /* Mark some specially defined symbols as absolute. */
3707 if (h == htab->elf.hdynamic
3708 || h == htab->elf.hgot
3709 || h == htab->elf.hplt)
3710 sym->st_shndx = SHN_ABS;
3711
3712 return TRUE;
3713 }
3714
3715 /* Used to decide how to sort relocs in an optimal manner for the
3716 dynamic linker, before writing them out. */
3717
3718 static enum elf_reloc_type_class
3719 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3720 const asection *rel_sec ATTRIBUTE_UNUSED,
3721 const Elf_Internal_Rela *rela)
3722 {
3723 switch ((int) ELF32_R_TYPE (rela->r_info))
3724 {
3725 case R_390_RELATIVE:
3726 return reloc_class_relative;
3727 case R_390_JMP_SLOT:
3728 return reloc_class_plt;
3729 case R_390_COPY:
3730 return reloc_class_copy;
3731 default:
3732 return reloc_class_normal;
3733 }
3734 }
3735
3736 /* Finish up the dynamic sections. */
3737
3738 static bfd_boolean
3739 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3740 struct bfd_link_info *info)
3741 {
3742 struct elf_s390_link_hash_table *htab;
3743 bfd *dynobj;
3744 asection *sdyn;
3745 bfd *ibfd;
3746 unsigned int i;
3747
3748 htab = elf_s390_hash_table (info);
3749 dynobj = htab->elf.dynobj;
3750 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3751
3752 if (htab->elf.dynamic_sections_created)
3753 {
3754 Elf32_External_Dyn *dyncon, *dynconend;
3755
3756 if (sdyn == NULL || htab->elf.sgot == NULL)
3757 abort ();
3758
3759 dyncon = (Elf32_External_Dyn *) sdyn->contents;
3760 dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size);
3761 for (; dyncon < dynconend; dyncon++)
3762 {
3763 Elf_Internal_Dyn dyn;
3764 asection *s;
3765
3766 bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn);
3767
3768 switch (dyn.d_tag)
3769 {
3770 default:
3771 continue;
3772
3773 case DT_PLTGOT:
3774 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3775 break;
3776
3777 case DT_JMPREL:
3778 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3779 break;
3780
3781 case DT_PLTRELSZ:
3782 s = htab->elf.srelplt->output_section;
3783 dyn.d_un.d_val = s->size;
3784 break;
3785 }
3786
3787 bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon);
3788 }
3789
3790 /* Fill in the special first entry in the procedure linkage table. */
3791 if (htab->elf.splt && htab->elf.splt->size > 0)
3792 {
3793 memset (htab->elf.splt->contents, 0, PLT_FIRST_ENTRY_SIZE);
3794 if (info->shared)
3795 {
3796 memcpy (htab->elf.splt->contents, elf_s390_plt_pic_first_entry,
3797 PLT_FIRST_ENTRY_SIZE);
3798 }
3799 else
3800 {
3801 memcpy (htab->elf.splt->contents, elf_s390_plt_first_entry,
3802 PLT_FIRST_ENTRY_SIZE);
3803 bfd_put_32 (output_bfd,
3804 htab->elf.sgotplt->output_section->vma
3805 + htab->elf.sgotplt->output_offset,
3806 htab->elf.splt->contents + 24);
3807 }
3808 elf_section_data (htab->elf.splt->output_section)
3809 ->this_hdr.sh_entsize = 4;
3810 }
3811
3812 }
3813
3814 if (htab->elf.sgotplt)
3815 {
3816 /* Fill in the first three entries in the global offset table. */
3817 if (htab->elf.sgotplt->size > 0)
3818 {
3819 bfd_put_32 (output_bfd,
3820 (sdyn == NULL ? (bfd_vma) 0
3821 : sdyn->output_section->vma + sdyn->output_offset),
3822 htab->elf.sgotplt->contents);
3823 /* One entry for shared object struct ptr. */
3824 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 4);
3825 /* One entry for _dl_runtime_resolve. */
3826 bfd_put_32 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3827 }
3828
3829 elf_section_data (htab->elf.sgotplt->output_section)
3830 ->this_hdr.sh_entsize = 4;
3831 }
3832 /* Finish dynamic symbol for local IFUNC symbols. */
3833 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3834 {
3835 struct plt_entry *local_plt;
3836 Elf_Internal_Sym *isym;
3837 Elf_Internal_Shdr *symtab_hdr;
3838
3839 symtab_hdr = &elf_symtab_hdr (ibfd);
3840
3841 local_plt = elf_s390_local_plt (ibfd);
3842 if (local_plt != NULL)
3843 for (i = 0; i < symtab_hdr->sh_info; i++)
3844 {
3845 if (local_plt[i].plt.offset != (bfd_vma) -1)
3846 {
3847 asection *sec = local_plt[i].sec;
3848 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3849 if (isym == NULL)
3850 return FALSE;
3851
3852 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3853 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3854 local_plt[i].plt.offset,
3855 isym->st_value
3856 + sec->output_section->vma
3857 + sec->output_offset);
3858
3859 }
3860 }
3861 }
3862 return TRUE;
3863 }
3864
3865 static bfd_boolean
3866 elf_s390_grok_prstatus (bfd * abfd, Elf_Internal_Note * note)
3867 {
3868 int offset;
3869 unsigned int size;
3870
3871 switch (note->descsz)
3872 {
3873 default:
3874 return FALSE;
3875
3876 case 224: /* S/390 Linux. */
3877 /* pr_cursig */
3878 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3879
3880 /* pr_pid */
3881 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 24);
3882
3883 /* pr_reg */
3884 offset = 72;
3885 size = 144;
3886 break;
3887 }
3888
3889 /* Make a ".reg/999" section. */
3890 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3891 size, note->descpos + offset);
3892 }
3893
3894 /* Return address for Ith PLT stub in section PLT, for relocation REL
3895 or (bfd_vma) -1 if it should not be included. */
3896
3897 static bfd_vma
3898 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3899 const arelent *rel ATTRIBUTE_UNUSED)
3900 {
3901 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3902 }
3903
3904 static bfd_boolean
3905 elf32_s390_merge_private_bfd_data (bfd *ibfd, bfd *obfd)
3906 {
3907 elf_elfheader (obfd)->e_flags |= elf_elfheader (ibfd)->e_flags;
3908 return TRUE;
3909 }
3910
3911
3912 #define TARGET_BIG_SYM bfd_elf32_s390_vec
3913 #define TARGET_BIG_NAME "elf32-s390"
3914 #define ELF_ARCH bfd_arch_s390
3915 #define ELF_TARGET_ID S390_ELF_DATA
3916 #define ELF_MACHINE_CODE EM_S390
3917 #define ELF_MACHINE_ALT1 EM_S390_OLD
3918 #define ELF_MAXPAGESIZE 0x1000
3919
3920 #define elf_backend_can_gc_sections 1
3921 #define elf_backend_can_refcount 1
3922 #define elf_backend_want_got_plt 1
3923 #define elf_backend_plt_readonly 1
3924 #define elf_backend_want_plt_sym 0
3925 #define elf_backend_got_header_size 12
3926 #define elf_backend_rela_normal 1
3927
3928 #define elf_info_to_howto elf_s390_info_to_howto
3929
3930 #define bfd_elf32_bfd_is_local_label_name elf_s390_is_local_label_name
3931 #define bfd_elf32_bfd_link_hash_table_create elf_s390_link_hash_table_create
3932 #define bfd_elf32_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3933 #define bfd_elf32_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3934
3935 #define bfd_elf32_bfd_merge_private_bfd_data elf32_s390_merge_private_bfd_data
3936
3937 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3938 #define elf_backend_check_relocs elf_s390_check_relocs
3939 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3940 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3941 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3942 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3943 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3944 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3945 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3946 #define elf_backend_relocate_section elf_s390_relocate_section
3947 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3948 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3949 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3950 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3951 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3952
3953 #define bfd_elf32_mkobject elf_s390_mkobject
3954 #define elf_backend_object_p elf_s390_object_p
3955
3956 #include "elf32-target.h"
GDB Binutils - Deliverables
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