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PR ld/15323
[deliverable/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010, 2011, 2012 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5
6 This file is part of BFD, the Binary File Descriptor library.
7
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
12
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
17
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
21 02110-1301, USA. */
22
23 #include "sysdep.h"
24 #include "bfd.h"
25 #include "bfdlink.h"
26 #include "libbfd.h"
27 #include "elf-bfd.h"
28 #include "elf/s390.h"
29
30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
31 from smaller values. Start with zero, widen, *then* decrement. */
32 #define MINUS_ONE (((bfd_vma)0) - 1)
33
34 static bfd_reloc_status_type
35 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
36 asection *, bfd *, char **);
37 static bfd_reloc_status_type
38 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
39 asection *, bfd *, char **);
40
41 /* The relocation "howto" table. */
42 static reloc_howto_type elf_howto_table[] =
43 {
44 HOWTO (R_390_NONE, /* type */
45 0, /* rightshift */
46 0, /* size (0 = byte, 1 = short, 2 = long) */
47 0, /* bitsize */
48 FALSE, /* pc_relative */
49 0, /* bitpos */
50 complain_overflow_dont, /* complain_on_overflow */
51 bfd_elf_generic_reloc, /* special_function */
52 "R_390_NONE", /* name */
53 FALSE, /* partial_inplace */
54 0, /* src_mask */
55 0, /* dst_mask */
56 FALSE), /* pcrel_offset */
57
58 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
60 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
61 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
62 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
64 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
66 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
68 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
70 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
74 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
76 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
78 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
80 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
82 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
84 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
86 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
88 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
92 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
94 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
96 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
98 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
100 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
102 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
104 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
106 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
108 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
110 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
112 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
114 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
115 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
116 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
118 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
120 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
122 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
124 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
126 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
128 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
131 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
132 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
133 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
134 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
136 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
137 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
139 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
140 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
141 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
142 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
145 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
147 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
148 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
150 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
152 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
153 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
155 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
156 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
158 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
160 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
162 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
164 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
165 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
166 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
167 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
168 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
169 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
170 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
171 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
172 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
174
175 };
176
177 /* GNU extension to record C++ vtable hierarchy. */
178 static reloc_howto_type elf64_s390_vtinherit_howto =
179 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
180 static reloc_howto_type elf64_s390_vtentry_howto =
181 HOWTO (R_390_GNU_VTENTRY, 0,4,0,FALSE,0,complain_overflow_dont, _bfd_elf_rel_vtable_reloc_fn,"R_390_GNU_VTENTRY", FALSE,0,0, FALSE);
182
183 static reloc_howto_type *
184 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
185 bfd_reloc_code_real_type code)
186 {
187 switch (code)
188 {
189 case BFD_RELOC_NONE:
190 return &elf_howto_table[(int) R_390_NONE];
191 case BFD_RELOC_8:
192 return &elf_howto_table[(int) R_390_8];
193 case BFD_RELOC_390_12:
194 return &elf_howto_table[(int) R_390_12];
195 case BFD_RELOC_16:
196 return &elf_howto_table[(int) R_390_16];
197 case BFD_RELOC_32:
198 return &elf_howto_table[(int) R_390_32];
199 case BFD_RELOC_CTOR:
200 return &elf_howto_table[(int) R_390_32];
201 case BFD_RELOC_32_PCREL:
202 return &elf_howto_table[(int) R_390_PC32];
203 case BFD_RELOC_390_GOT12:
204 return &elf_howto_table[(int) R_390_GOT12];
205 case BFD_RELOC_32_GOT_PCREL:
206 return &elf_howto_table[(int) R_390_GOT32];
207 case BFD_RELOC_390_PLT32:
208 return &elf_howto_table[(int) R_390_PLT32];
209 case BFD_RELOC_390_COPY:
210 return &elf_howto_table[(int) R_390_COPY];
211 case BFD_RELOC_390_GLOB_DAT:
212 return &elf_howto_table[(int) R_390_GLOB_DAT];
213 case BFD_RELOC_390_JMP_SLOT:
214 return &elf_howto_table[(int) R_390_JMP_SLOT];
215 case BFD_RELOC_390_RELATIVE:
216 return &elf_howto_table[(int) R_390_RELATIVE];
217 case BFD_RELOC_32_GOTOFF:
218 return &elf_howto_table[(int) R_390_GOTOFF32];
219 case BFD_RELOC_390_GOTPC:
220 return &elf_howto_table[(int) R_390_GOTPC];
221 case BFD_RELOC_390_GOT16:
222 return &elf_howto_table[(int) R_390_GOT16];
223 case BFD_RELOC_16_PCREL:
224 return &elf_howto_table[(int) R_390_PC16];
225 case BFD_RELOC_390_PC16DBL:
226 return &elf_howto_table[(int) R_390_PC16DBL];
227 case BFD_RELOC_390_PLT16DBL:
228 return &elf_howto_table[(int) R_390_PLT16DBL];
229 case BFD_RELOC_390_PC32DBL:
230 return &elf_howto_table[(int) R_390_PC32DBL];
231 case BFD_RELOC_390_PLT32DBL:
232 return &elf_howto_table[(int) R_390_PLT32DBL];
233 case BFD_RELOC_390_GOTPCDBL:
234 return &elf_howto_table[(int) R_390_GOTPCDBL];
235 case BFD_RELOC_64:
236 return &elf_howto_table[(int) R_390_64];
237 case BFD_RELOC_64_PCREL:
238 return &elf_howto_table[(int) R_390_PC64];
239 case BFD_RELOC_390_GOT64:
240 return &elf_howto_table[(int) R_390_GOT64];
241 case BFD_RELOC_390_PLT64:
242 return &elf_howto_table[(int) R_390_PLT64];
243 case BFD_RELOC_390_GOTENT:
244 return &elf_howto_table[(int) R_390_GOTENT];
245 case BFD_RELOC_16_GOTOFF:
246 return &elf_howto_table[(int) R_390_GOTOFF16];
247 case BFD_RELOC_390_GOTOFF64:
248 return &elf_howto_table[(int) R_390_GOTOFF64];
249 case BFD_RELOC_390_GOTPLT12:
250 return &elf_howto_table[(int) R_390_GOTPLT12];
251 case BFD_RELOC_390_GOTPLT16:
252 return &elf_howto_table[(int) R_390_GOTPLT16];
253 case BFD_RELOC_390_GOTPLT32:
254 return &elf_howto_table[(int) R_390_GOTPLT32];
255 case BFD_RELOC_390_GOTPLT64:
256 return &elf_howto_table[(int) R_390_GOTPLT64];
257 case BFD_RELOC_390_GOTPLTENT:
258 return &elf_howto_table[(int) R_390_GOTPLTENT];
259 case BFD_RELOC_390_PLTOFF16:
260 return &elf_howto_table[(int) R_390_PLTOFF16];
261 case BFD_RELOC_390_PLTOFF32:
262 return &elf_howto_table[(int) R_390_PLTOFF32];
263 case BFD_RELOC_390_PLTOFF64:
264 return &elf_howto_table[(int) R_390_PLTOFF64];
265 case BFD_RELOC_390_TLS_LOAD:
266 return &elf_howto_table[(int) R_390_TLS_LOAD];
267 case BFD_RELOC_390_TLS_GDCALL:
268 return &elf_howto_table[(int) R_390_TLS_GDCALL];
269 case BFD_RELOC_390_TLS_LDCALL:
270 return &elf_howto_table[(int) R_390_TLS_LDCALL];
271 case BFD_RELOC_390_TLS_GD64:
272 return &elf_howto_table[(int) R_390_TLS_GD64];
273 case BFD_RELOC_390_TLS_GOTIE12:
274 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
275 case BFD_RELOC_390_TLS_GOTIE64:
276 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
277 case BFD_RELOC_390_TLS_LDM64:
278 return &elf_howto_table[(int) R_390_TLS_LDM64];
279 case BFD_RELOC_390_TLS_IE64:
280 return &elf_howto_table[(int) R_390_TLS_IE64];
281 case BFD_RELOC_390_TLS_IEENT:
282 return &elf_howto_table[(int) R_390_TLS_IEENT];
283 case BFD_RELOC_390_TLS_LE64:
284 return &elf_howto_table[(int) R_390_TLS_LE64];
285 case BFD_RELOC_390_TLS_LDO64:
286 return &elf_howto_table[(int) R_390_TLS_LDO64];
287 case BFD_RELOC_390_TLS_DTPMOD:
288 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
289 case BFD_RELOC_390_TLS_DTPOFF:
290 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
291 case BFD_RELOC_390_TLS_TPOFF:
292 return &elf_howto_table[(int) R_390_TLS_TPOFF];
293 case BFD_RELOC_390_20:
294 return &elf_howto_table[(int) R_390_20];
295 case BFD_RELOC_390_GOT20:
296 return &elf_howto_table[(int) R_390_GOT20];
297 case BFD_RELOC_390_GOTPLT20:
298 return &elf_howto_table[(int) R_390_GOTPLT20];
299 case BFD_RELOC_390_TLS_GOTIE20:
300 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
301 case BFD_RELOC_390_IRELATIVE:
302 return &elf_howto_table[(int) R_390_IRELATIVE];
303 case BFD_RELOC_VTABLE_INHERIT:
304 return &elf64_s390_vtinherit_howto;
305 case BFD_RELOC_VTABLE_ENTRY:
306 return &elf64_s390_vtentry_howto;
307 default:
308 break;
309 }
310 return 0;
311 }
312
313 static reloc_howto_type *
314 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
315 const char *r_name)
316 {
317 unsigned int i;
318
319 for (i = 0;
320 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
321 i++)
322 if (elf_howto_table[i].name != NULL
323 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
324 return &elf_howto_table[i];
325
326 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
327 return &elf64_s390_vtinherit_howto;
328 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
329 return &elf64_s390_vtentry_howto;
330
331 return NULL;
332 }
333
334 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
335 and elf64-s390.c has its own copy. */
336
337 static void
338 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
339 arelent *cache_ptr,
340 Elf_Internal_Rela *dst)
341 {
342 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
343 switch (r_type)
344 {
345 case R_390_GNU_VTINHERIT:
346 cache_ptr->howto = &elf64_s390_vtinherit_howto;
347 break;
348
349 case R_390_GNU_VTENTRY:
350 cache_ptr->howto = &elf64_s390_vtentry_howto;
351 break;
352
353 default:
354 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
355 {
356 (*_bfd_error_handler) (_("%B: invalid relocation type %d"),
357 abfd, (int) r_type);
358 r_type = R_390_NONE;
359 }
360 cache_ptr->howto = &elf_howto_table[r_type];
361 }
362 }
363
364 /* A relocation function which doesn't do anything. */
365 static bfd_reloc_status_type
366 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
367 arelent *reloc_entry,
368 asymbol *symbol ATTRIBUTE_UNUSED,
369 void * data ATTRIBUTE_UNUSED,
370 asection *input_section,
371 bfd *output_bfd,
372 char **error_message ATTRIBUTE_UNUSED)
373 {
374 if (output_bfd)
375 reloc_entry->address += input_section->output_offset;
376 return bfd_reloc_ok;
377 }
378
379 /* Handle the large displacement relocs. */
380 static bfd_reloc_status_type
381 s390_elf_ldisp_reloc (bfd *abfd,
382 arelent *reloc_entry,
383 asymbol *symbol,
384 void * data,
385 asection *input_section,
386 bfd *output_bfd,
387 char **error_message ATTRIBUTE_UNUSED)
388 {
389 reloc_howto_type *howto = reloc_entry->howto;
390 bfd_vma relocation;
391 bfd_vma insn;
392
393 if (output_bfd != (bfd *) NULL
394 && (symbol->flags & BSF_SECTION_SYM) == 0
395 && (! howto->partial_inplace
396 || reloc_entry->addend == 0))
397 {
398 reloc_entry->address += input_section->output_offset;
399 return bfd_reloc_ok;
400 }
401 if (output_bfd != NULL)
402 return bfd_reloc_continue;
403
404 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
405 return bfd_reloc_outofrange;
406
407 relocation = (symbol->value
408 + symbol->section->output_section->vma
409 + symbol->section->output_offset);
410 relocation += reloc_entry->addend;
411 if (howto->pc_relative)
412 {
413 relocation -= (input_section->output_section->vma
414 + input_section->output_offset);
415 relocation -= reloc_entry->address;
416 }
417
418 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
419 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
420 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
421
422 if ((bfd_signed_vma) relocation < - 0x80000
423 || (bfd_signed_vma) relocation > 0x7ffff)
424 return bfd_reloc_overflow;
425 else
426 return bfd_reloc_ok;
427 }
428
429 static bfd_boolean
430 elf_s390_is_local_label_name (bfd *abfd, const char *name)
431 {
432 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
433 return TRUE;
434
435 return _bfd_elf_is_local_label_name (abfd, name);
436 }
437
438 /* Functions for the 390 ELF linker. */
439
440 /* The name of the dynamic interpreter. This is put in the .interp
441 section. */
442
443 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
444
445 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
446 copying dynamic variables from a shared lib into an app's dynbss
447 section, and instead use a dynamic relocation to point into the
448 shared lib. */
449 #define ELIMINATE_COPY_RELOCS 1
450
451 /* The size in bytes of the first entry in the procedure linkage table. */
452 #define PLT_FIRST_ENTRY_SIZE 32
453 /* The size in bytes of an entry in the procedure linkage table. */
454 #define PLT_ENTRY_SIZE 32
455
456 #define GOT_ENTRY_SIZE 8
457
458 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
459
460 /* The first three entries in a procedure linkage table are reserved,
461 and the initial contents are unimportant (we zero them out).
462 Subsequent entries look like this. See the SVR4 ABI 386
463 supplement to see how this works. */
464
465 /* For the s390, simple addr offset can only be 0 - 4096.
466 To use the full 16777216 TB address space, several instructions
467 are needed to load an address in a register and execute
468 a branch( or just saving the address)
469
470 Furthermore, only r 0 and 1 are free to use!!! */
471
472 /* The first 3 words in the GOT are then reserved.
473 Word 0 is the address of the dynamic table.
474 Word 1 is a pointer to a structure describing the object
475 Word 2 is used to point to the loader entry address.
476
477 The code for PLT entries looks like this:
478
479 The GOT holds the address in the PLT to be executed.
480 The loader then gets:
481 24(15) = Pointer to the structure describing the object.
482 28(15) = Offset in symbol table
483 The loader must then find the module where the function is
484 and insert the address in the GOT.
485
486 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
487 LG 1,0(1) # 6 bytes Load address from GOT in r1
488 BCR 15,1 # 2 bytes Jump to address
489 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
490 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
491 BRCL 15,-x # 6 bytes Jump to start of PLT
492 .long ? # 4 bytes offset into .rela.plt
493
494 Total = 32 bytes per PLT entry
495 Fixup at offset 2: relative address to GOT entry
496 Fixup at offset 22: relative branch to PLT0
497 Fixup at offset 28: 32 bit offset into .rela.plt
498
499 A 32 bit offset into the symbol table is enough. It allows for
500 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
501 object (the main program, any shared library) is limited to 4GB in
502 size. Having a .rela.plt of 2GB would already make the .plt
503 section bigger than 8GB. */
504
505 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
506 {
507 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
508 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
509 0x07, 0xf1, /* br %r1 */
510 0x0d, 0x10, /* basr %r1,%r0 */
511 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
512 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
513 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
514 };
515
516 /* The first PLT entry pushes the offset into the symbol table
517 from R1 onto the stack at 56(15) and the loader object info
518 at 48(15), loads the loader address in R1 and jumps to it. */
519
520 /* The first entry in the PLT:
521
522 PLT0:
523 STG 1,56(15) # r1 contains the offset into the symbol table
524 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
525 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
526 LG 1,16(1) # get entry address of loader
527 BCR 15,1 # jump to loader
528
529 Fixup at offset 8: relative address to start of GOT. */
530
531 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
532 {
533 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
534 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
535 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
536 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
537 0x07, 0xf1, /* br %r1 */
538 0x07, 0x00, /* nopr %r0 */
539 0x07, 0x00, /* nopr %r0 */
540 0x07, 0x00 /* nopr %r0 */
541 };
542
543
544 /* s390 ELF linker hash entry. */
545
546 struct elf_s390_link_hash_entry
547 {
548 struct elf_link_hash_entry elf;
549
550 /* Track dynamic relocs copied for this symbol. */
551 struct elf_dyn_relocs *dyn_relocs;
552
553 /* Number of GOTPLT references for a function. */
554 bfd_signed_vma gotplt_refcount;
555
556 #define GOT_UNKNOWN 0
557 #define GOT_NORMAL 1
558 #define GOT_TLS_GD 2
559 #define GOT_TLS_IE 3
560 #define GOT_TLS_IE_NLT 3
561 unsigned char tls_type;
562
563 /* For pointer equality reasons we might need to change the symbol
564 type from STT_GNU_IFUNC to STT_FUNC together with its value and
565 section entry. So after alloc_dynrelocs only these values should
566 be used. In order to check whether a symbol is IFUNC use
567 s390_is_ifunc_symbol_p. */
568 bfd_vma ifunc_resolver_address;
569 asection *ifunc_resolver_section;
570 };
571
572 #define elf_s390_hash_entry(ent) \
573 ((struct elf_s390_link_hash_entry *)(ent))
574
575 /* This structure represents an entry in the local PLT list needed for
576 local IFUNC symbols. */
577 struct plt_entry
578 {
579 /* The section of the local symbol.
580 Set in relocate_section and used in finish_dynamic_sections. */
581 asection *sec;
582
583 union
584 {
585 bfd_signed_vma refcount;
586 bfd_vma offset;
587 } plt;
588 };
589
590 /* NOTE: Keep this structure in sync with
591 the one declared in elf32-s390.c. */
592 struct elf_s390_obj_tdata
593 {
594 struct elf_obj_tdata root;
595
596 /* A local PLT is needed for ifunc symbols. */
597 struct plt_entry *local_plt;
598
599 /* TLS type for each local got entry. */
600 char *local_got_tls_type;
601 };
602
603 #define elf_s390_tdata(abfd) \
604 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
605
606 #define elf_s390_local_plt(abfd) \
607 (elf_s390_tdata (abfd)->local_plt)
608
609 #define elf_s390_local_got_tls_type(abfd) \
610 (elf_s390_tdata (abfd)->local_got_tls_type)
611
612 #define is_s390_elf(bfd) \
613 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
614 && elf_tdata (bfd) != NULL \
615 && elf_object_id (bfd) == S390_ELF_DATA)
616
617 static bfd_boolean
618 elf_s390_mkobject (bfd *abfd)
619 {
620 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
621 S390_ELF_DATA);
622 }
623
624 static bfd_boolean
625 elf_s390_object_p (bfd *abfd)
626 {
627 /* Set the right machine number for an s390 elf32 file. */
628 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
629 }
630
631 /* s390 ELF linker hash table. */
632
633 struct elf_s390_link_hash_table
634 {
635 struct elf_link_hash_table elf;
636
637 /* Short-cuts to get to dynamic linker sections. */
638 asection *sdynbss;
639 asection *srelbss;
640 asection *irelifunc;
641
642 union {
643 bfd_signed_vma refcount;
644 bfd_vma offset;
645 } tls_ldm_got;
646
647 /* Small local sym cache. */
648 struct sym_cache sym_cache;
649 };
650
651 /* Get the s390 ELF linker hash table from a link_info structure. */
652
653 #define elf_s390_hash_table(p) \
654 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
655 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
656
657 #define ELF64 1
658 #include "elf-s390-common.c"
659
660 /* Create an entry in an s390 ELF linker hash table. */
661
662 static struct bfd_hash_entry *
663 link_hash_newfunc (struct bfd_hash_entry *entry,
664 struct bfd_hash_table *table,
665 const char *string)
666 {
667 /* Allocate the structure if it has not already been allocated by a
668 subclass. */
669 if (entry == NULL)
670 {
671 entry = bfd_hash_allocate (table,
672 sizeof (struct elf_s390_link_hash_entry));
673 if (entry == NULL)
674 return entry;
675 }
676
677 /* Call the allocation method of the superclass. */
678 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
679 if (entry != NULL)
680 {
681 struct elf_s390_link_hash_entry *eh;
682
683 eh = (struct elf_s390_link_hash_entry *) entry;
684 eh->dyn_relocs = NULL;
685 eh->gotplt_refcount = 0;
686 eh->tls_type = GOT_UNKNOWN;
687 eh->ifunc_resolver_address = 0;
688 eh->ifunc_resolver_section = NULL;
689 }
690
691 return entry;
692 }
693
694 /* Create an s390 ELF linker hash table. */
695
696 static struct bfd_link_hash_table *
697 elf_s390_link_hash_table_create (bfd *abfd)
698 {
699 struct elf_s390_link_hash_table *ret;
700 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
701
702 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
703 if (ret == NULL)
704 return NULL;
705
706 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
707 sizeof (struct elf_s390_link_hash_entry),
708 S390_ELF_DATA))
709 {
710 free (ret);
711 return NULL;
712 }
713
714 return &ret->elf.root;
715 }
716
717 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
718 shortcuts to them in our hash table. */
719
720 static bfd_boolean
721 create_got_section (bfd *dynobj,
722 struct bfd_link_info *info)
723 {
724 struct elf_s390_link_hash_table *htab;
725
726 if (! _bfd_elf_create_got_section (dynobj, info))
727 return FALSE;
728
729 htab = elf_s390_hash_table (info);
730 if (htab == NULL)
731 return FALSE;
732
733 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
734 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
735 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
736 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
737 abort ();
738 return TRUE;
739 }
740
741 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
742 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
743 hash table. */
744
745 static bfd_boolean
746 elf_s390_create_dynamic_sections (bfd *dynobj,
747 struct bfd_link_info *info)
748 {
749 struct elf_s390_link_hash_table *htab;
750
751 htab = elf_s390_hash_table (info);
752 if (htab == NULL)
753 return FALSE;
754
755 if (!htab->elf.sgot && !create_got_section (dynobj, info))
756 return FALSE;
757
758 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
759 return FALSE;
760
761 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
762 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
763 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
764 if (!info->shared)
765 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
766
767 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
768 || (!info->shared && !htab->srelbss))
769 abort ();
770
771 return TRUE;
772 }
773
774 /* Copy the extra info we tack onto an elf_link_hash_entry. */
775
776 static void
777 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
778 struct elf_link_hash_entry *dir,
779 struct elf_link_hash_entry *ind)
780 {
781 struct elf_s390_link_hash_entry *edir, *eind;
782
783 edir = (struct elf_s390_link_hash_entry *) dir;
784 eind = (struct elf_s390_link_hash_entry *) ind;
785
786 if (eind->dyn_relocs != NULL)
787 {
788 if (edir->dyn_relocs != NULL)
789 {
790 struct elf_dyn_relocs **pp;
791 struct elf_dyn_relocs *p;
792
793 /* Add reloc counts against the indirect sym to the direct sym
794 list. Merge any entries against the same section. */
795 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
796 {
797 struct elf_dyn_relocs *q;
798
799 for (q = edir->dyn_relocs; q != NULL; q = q->next)
800 if (q->sec == p->sec)
801 {
802 q->pc_count += p->pc_count;
803 q->count += p->count;
804 *pp = p->next;
805 break;
806 }
807 if (q == NULL)
808 pp = &p->next;
809 }
810 *pp = edir->dyn_relocs;
811 }
812
813 edir->dyn_relocs = eind->dyn_relocs;
814 eind->dyn_relocs = NULL;
815 }
816
817 if (ind->root.type == bfd_link_hash_indirect
818 && dir->got.refcount <= 0)
819 {
820 edir->tls_type = eind->tls_type;
821 eind->tls_type = GOT_UNKNOWN;
822 }
823
824 if (ELIMINATE_COPY_RELOCS
825 && ind->root.type != bfd_link_hash_indirect
826 && dir->dynamic_adjusted)
827 {
828 /* If called to transfer flags for a weakdef during processing
829 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
830 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
831 dir->ref_dynamic |= ind->ref_dynamic;
832 dir->ref_regular |= ind->ref_regular;
833 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
834 dir->needs_plt |= ind->needs_plt;
835 }
836 else
837 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
838 }
839
840 static int
841 elf_s390_tls_transition (struct bfd_link_info *info,
842 int r_type,
843 int is_local)
844 {
845 if (info->shared)
846 return r_type;
847
848 switch (r_type)
849 {
850 case R_390_TLS_GD64:
851 case R_390_TLS_IE64:
852 if (is_local)
853 return R_390_TLS_LE64;
854 return R_390_TLS_IE64;
855 case R_390_TLS_GOTIE64:
856 if (is_local)
857 return R_390_TLS_LE64;
858 return R_390_TLS_GOTIE64;
859 case R_390_TLS_LDM64:
860 return R_390_TLS_LE64;
861 }
862
863 return r_type;
864 }
865
866 /* Look through the relocs for a section during the first phase, and
867 allocate space in the global offset table or procedure linkage
868 table. */
869
870 static bfd_boolean
871 elf_s390_check_relocs (bfd *abfd,
872 struct bfd_link_info *info,
873 asection *sec,
874 const Elf_Internal_Rela *relocs)
875 {
876 struct elf_s390_link_hash_table *htab;
877 Elf_Internal_Shdr *symtab_hdr;
878 struct elf_link_hash_entry **sym_hashes;
879 const Elf_Internal_Rela *rel;
880 const Elf_Internal_Rela *rel_end;
881 asection *sreloc;
882 bfd_signed_vma *local_got_refcounts;
883 int tls_type, old_tls_type;
884
885 if (info->relocatable)
886 return TRUE;
887
888 BFD_ASSERT (is_s390_elf (abfd));
889
890 htab = elf_s390_hash_table (info);
891 if (htab == NULL)
892 return FALSE;
893
894 symtab_hdr = &elf_symtab_hdr (abfd);
895 sym_hashes = elf_sym_hashes (abfd);
896 local_got_refcounts = elf_local_got_refcounts (abfd);
897
898 sreloc = NULL;
899
900 rel_end = relocs + sec->reloc_count;
901 for (rel = relocs; rel < rel_end; rel++)
902 {
903 unsigned int r_type;
904 unsigned long r_symndx;
905 struct elf_link_hash_entry *h;
906 Elf_Internal_Sym *isym;
907
908 r_symndx = ELF64_R_SYM (rel->r_info);
909
910 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
911 {
912 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
913 abfd,
914 r_symndx);
915 return FALSE;
916 }
917
918 if (r_symndx < symtab_hdr->sh_info)
919 {
920 /* A local symbol. */
921 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
922 abfd, r_symndx);
923 if (isym == NULL)
924 return FALSE;
925
926 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
927 {
928 struct plt_entry *plt;
929
930 if (htab->elf.dynobj == NULL)
931 htab->elf.dynobj = abfd;
932
933 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
934 return FALSE;
935
936 if (local_got_refcounts == NULL)
937 {
938 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
939 return FALSE;
940 local_got_refcounts = elf_local_got_refcounts (abfd);
941 }
942 plt = elf_s390_local_plt (abfd);
943 plt[r_symndx].plt.refcount++;
944 }
945 h = NULL;
946 }
947 else
948 {
949 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
950 while (h->root.type == bfd_link_hash_indirect
951 || h->root.type == bfd_link_hash_warning)
952 h = (struct elf_link_hash_entry *) h->root.u.i.link;
953
954 /* PR15323, ref flags aren't set for references in the same
955 object. */
956 h->root.non_ir_ref = 1;
957 }
958
959 /* Create got section and local_got_refcounts array if they
960 are needed. */
961 r_type = elf_s390_tls_transition (info,
962 ELF64_R_TYPE (rel->r_info),
963 h == NULL);
964 switch (r_type)
965 {
966 case R_390_GOT12:
967 case R_390_GOT16:
968 case R_390_GOT20:
969 case R_390_GOT32:
970 case R_390_GOT64:
971 case R_390_GOTENT:
972 case R_390_GOTPLT12:
973 case R_390_GOTPLT16:
974 case R_390_GOTPLT20:
975 case R_390_GOTPLT32:
976 case R_390_GOTPLT64:
977 case R_390_GOTPLTENT:
978 case R_390_TLS_GD64:
979 case R_390_TLS_GOTIE12:
980 case R_390_TLS_GOTIE20:
981 case R_390_TLS_GOTIE64:
982 case R_390_TLS_IEENT:
983 case R_390_TLS_IE64:
984 case R_390_TLS_LDM64:
985 if (h == NULL
986 && local_got_refcounts == NULL)
987 {
988 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
989 return FALSE;
990 local_got_refcounts = elf_local_got_refcounts (abfd);
991 }
992
993 /* Fall through. */
994 case R_390_GOTOFF16:
995 case R_390_GOTOFF32:
996 case R_390_GOTOFF64:
997 case R_390_GOTPC:
998 case R_390_GOTPCDBL:
999 if (htab->elf.sgot == NULL)
1000 {
1001 if (htab->elf.dynobj == NULL)
1002 htab->elf.dynobj = abfd;
1003 if (!create_got_section (htab->elf.dynobj, info))
1004 return FALSE;
1005 }
1006 }
1007
1008 if (h != NULL)
1009 {
1010 if (htab->elf.dynobj == NULL)
1011 htab->elf.dynobj = abfd;
1012 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1013 return FALSE;
1014
1015 /* Make sure an IFUNC symbol defined in a non-shared object
1016 always gets a PLT slot. */
1017 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1018 {
1019 /* The symbol is called by the dynamic loader in order
1020 to resolve the relocation. So it is in fact also
1021 referenced. */
1022 h->ref_regular = 1;
1023 h->needs_plt = 1;
1024 }
1025 }
1026
1027 switch (r_type)
1028 {
1029 case R_390_GOTOFF16:
1030 case R_390_GOTOFF32:
1031 case R_390_GOTOFF64:
1032 case R_390_GOTPC:
1033 case R_390_GOTPCDBL:
1034 /* These relocs do not need a GOT slot. They just load the
1035 GOT pointer itself or address something else relative to
1036 the GOT. Since the GOT pointer has been set up above we
1037 are done. */
1038 break;
1039
1040 case R_390_PLT16DBL:
1041 case R_390_PLT32:
1042 case R_390_PLT32DBL:
1043 case R_390_PLT64:
1044 case R_390_PLTOFF16:
1045 case R_390_PLTOFF32:
1046 case R_390_PLTOFF64:
1047 /* This symbol requires a procedure linkage table entry. We
1048 actually build the entry in adjust_dynamic_symbol,
1049 because this might be a case of linking PIC code which is
1050 never referenced by a dynamic object, in which case we
1051 don't need to generate a procedure linkage table entry
1052 after all. */
1053
1054 /* If this is a local symbol, we resolve it directly without
1055 creating a procedure linkage table entry. */
1056 if (h != NULL)
1057 {
1058 h->needs_plt = 1;
1059 h->plt.refcount += 1;
1060 }
1061 break;
1062
1063 case R_390_GOTPLT12:
1064 case R_390_GOTPLT16:
1065 case R_390_GOTPLT20:
1066 case R_390_GOTPLT32:
1067 case R_390_GOTPLT64:
1068 case R_390_GOTPLTENT:
1069 /* This symbol requires either a procedure linkage table entry
1070 or an entry in the local got. We actually build the entry
1071 in adjust_dynamic_symbol because whether this is really a
1072 global reference can change and with it the fact if we have
1073 to create a plt entry or a local got entry. To be able to
1074 make a once global symbol a local one we have to keep track
1075 of the number of gotplt references that exist for this
1076 symbol. */
1077 if (h != NULL)
1078 {
1079 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1080 h->needs_plt = 1;
1081 h->plt.refcount += 1;
1082 }
1083 else
1084 local_got_refcounts[r_symndx] += 1;
1085 break;
1086
1087 case R_390_TLS_LDM64:
1088 htab->tls_ldm_got.refcount += 1;
1089 break;
1090
1091 case R_390_TLS_IE64:
1092 case R_390_TLS_GOTIE12:
1093 case R_390_TLS_GOTIE20:
1094 case R_390_TLS_GOTIE64:
1095 case R_390_TLS_IEENT:
1096 if (info->shared)
1097 info->flags |= DF_STATIC_TLS;
1098 /* Fall through */
1099
1100 case R_390_GOT12:
1101 case R_390_GOT16:
1102 case R_390_GOT20:
1103 case R_390_GOT32:
1104 case R_390_GOT64:
1105 case R_390_GOTENT:
1106 case R_390_TLS_GD64:
1107 /* This symbol requires a global offset table entry. */
1108 switch (r_type)
1109 {
1110 default:
1111 case R_390_GOT12:
1112 case R_390_GOT16:
1113 case R_390_GOT20:
1114 case R_390_GOT32:
1115 case R_390_GOTENT:
1116 tls_type = GOT_NORMAL;
1117 break;
1118 case R_390_TLS_GD64:
1119 tls_type = GOT_TLS_GD;
1120 break;
1121 case R_390_TLS_IE64:
1122 case R_390_TLS_GOTIE64:
1123 tls_type = GOT_TLS_IE;
1124 break;
1125 case R_390_TLS_GOTIE12:
1126 case R_390_TLS_GOTIE20:
1127 case R_390_TLS_IEENT:
1128 tls_type = GOT_TLS_IE_NLT;
1129 break;
1130 }
1131
1132 if (h != NULL)
1133 {
1134 h->got.refcount += 1;
1135 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1136 }
1137 else
1138 {
1139 local_got_refcounts[r_symndx] += 1;
1140 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1141 }
1142 /* If a TLS symbol is accessed using IE at least once,
1143 there is no point to use dynamic model for it. */
1144 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1145 {
1146 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1147 {
1148 (*_bfd_error_handler)
1149 (_("%B: `%s' accessed both as normal and thread local symbol"),
1150 abfd, h->root.root.string);
1151 return FALSE;
1152 }
1153 if (old_tls_type > tls_type)
1154 tls_type = old_tls_type;
1155 }
1156
1157 if (old_tls_type != tls_type)
1158 {
1159 if (h != NULL)
1160 elf_s390_hash_entry (h)->tls_type = tls_type;
1161 else
1162 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1163 }
1164
1165 if (r_type != R_390_TLS_IE64)
1166 break;
1167 /* Fall through */
1168
1169 case R_390_TLS_LE64:
1170 if (!info->shared)
1171 break;
1172 info->flags |= DF_STATIC_TLS;
1173 /* Fall through */
1174
1175 case R_390_8:
1176 case R_390_16:
1177 case R_390_32:
1178 case R_390_64:
1179 case R_390_PC16:
1180 case R_390_PC16DBL:
1181 case R_390_PC32:
1182 case R_390_PC32DBL:
1183 case R_390_PC64:
1184 if (h != NULL)
1185 {
1186 /* If this reloc is in a read-only section, we might
1187 need a copy reloc. We can't check reliably at this
1188 stage whether the section is read-only, as input
1189 sections have not yet been mapped to output sections.
1190 Tentatively set the flag for now, and correct in
1191 adjust_dynamic_symbol. */
1192 h->non_got_ref = 1;
1193
1194 if (!info->shared)
1195 {
1196 /* We may need a .plt entry if the function this reloc
1197 refers to is in a shared lib. */
1198 h->plt.refcount += 1;
1199 }
1200 }
1201
1202 /* If we are creating a shared library, and this is a reloc
1203 against a global symbol, or a non PC relative reloc
1204 against a local symbol, then we need to copy the reloc
1205 into the shared library. However, if we are linking with
1206 -Bsymbolic, we do not need to copy a reloc against a
1207 global symbol which is defined in an object we are
1208 including in the link (i.e., DEF_REGULAR is set). At
1209 this point we have not seen all the input files, so it is
1210 possible that DEF_REGULAR is not set now but will be set
1211 later (it is never cleared). In case of a weak definition,
1212 DEF_REGULAR may be cleared later by a strong definition in
1213 a shared library. We account for that possibility below by
1214 storing information in the relocs_copied field of the hash
1215 table entry. A similar situation occurs when creating
1216 shared libraries and symbol visibility changes render the
1217 symbol local.
1218
1219 If on the other hand, we are creating an executable, we
1220 may need to keep relocations for symbols satisfied by a
1221 dynamic library if we manage to avoid copy relocs for the
1222 symbol. */
1223 if ((info->shared
1224 && (sec->flags & SEC_ALLOC) != 0
1225 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1226 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1227 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1228 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1229 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1230 || (h != NULL
1231 && (! SYMBOLIC_BIND (info, h)
1232 || h->root.type == bfd_link_hash_defweak
1233 || !h->def_regular))))
1234 || (ELIMINATE_COPY_RELOCS
1235 && !info->shared
1236 && (sec->flags & SEC_ALLOC) != 0
1237 && h != NULL
1238 && (h->root.type == bfd_link_hash_defweak
1239 || !h->def_regular)))
1240 {
1241 struct elf_dyn_relocs *p;
1242 struct elf_dyn_relocs **head;
1243
1244 /* We must copy these reloc types into the output file.
1245 Create a reloc section in dynobj and make room for
1246 this reloc. */
1247 if (sreloc == NULL)
1248 {
1249 if (htab->elf.dynobj == NULL)
1250 htab->elf.dynobj = abfd;
1251
1252 sreloc = _bfd_elf_make_dynamic_reloc_section
1253 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1254
1255 if (sreloc == NULL)
1256 return FALSE;
1257 }
1258
1259 /* If this is a global symbol, we count the number of
1260 relocations we need for this symbol. */
1261 if (h != NULL)
1262 {
1263 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1264 }
1265 else
1266 {
1267 /* Track dynamic relocs needed for local syms too.
1268 We really need local syms available to do this
1269 easily. Oh well. */
1270 asection *s;
1271 void *vpp;
1272
1273 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1274 abfd, r_symndx);
1275 if (isym == NULL)
1276 return FALSE;
1277
1278 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1279 if (s == NULL)
1280 s = sec;
1281
1282 vpp = &elf_section_data (s)->local_dynrel;
1283 head = (struct elf_dyn_relocs **) vpp;
1284 }
1285
1286 p = *head;
1287 if (p == NULL || p->sec != sec)
1288 {
1289 bfd_size_type amt = sizeof *p;
1290 p = ((struct elf_dyn_relocs *)
1291 bfd_alloc (htab->elf.dynobj, amt));
1292 if (p == NULL)
1293 return FALSE;
1294 p->next = *head;
1295 *head = p;
1296 p->sec = sec;
1297 p->count = 0;
1298 p->pc_count = 0;
1299 }
1300
1301 p->count += 1;
1302 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1303 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1304 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1305 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1306 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1307 p->pc_count += 1;
1308 }
1309 break;
1310
1311 /* This relocation describes the C++ object vtable hierarchy.
1312 Reconstruct it for later use during GC. */
1313 case R_390_GNU_VTINHERIT:
1314 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1315 return FALSE;
1316 break;
1317
1318 /* This relocation describes which C++ vtable entries are actually
1319 used. Record for later use during GC. */
1320 case R_390_GNU_VTENTRY:
1321 BFD_ASSERT (h != NULL);
1322 if (h != NULL
1323 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1324 return FALSE;
1325 break;
1326
1327 default:
1328 break;
1329 }
1330 }
1331
1332 return TRUE;
1333 }
1334
1335 /* Return the section that should be marked against GC for a given
1336 relocation. */
1337
1338 static asection *
1339 elf_s390_gc_mark_hook (asection *sec,
1340 struct bfd_link_info *info,
1341 Elf_Internal_Rela *rel,
1342 struct elf_link_hash_entry *h,
1343 Elf_Internal_Sym *sym)
1344 {
1345 if (h != NULL)
1346 switch (ELF64_R_TYPE (rel->r_info))
1347 {
1348 case R_390_GNU_VTINHERIT:
1349 case R_390_GNU_VTENTRY:
1350 return NULL;
1351 }
1352
1353 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1354 }
1355
1356 /* Update the got entry reference counts for the section being removed. */
1357
1358 static bfd_boolean
1359 elf_s390_gc_sweep_hook (bfd *abfd,
1360 struct bfd_link_info *info,
1361 asection *sec,
1362 const Elf_Internal_Rela *relocs)
1363 {
1364 struct elf_s390_link_hash_table *htab;
1365 Elf_Internal_Shdr *symtab_hdr;
1366 struct elf_link_hash_entry **sym_hashes;
1367 bfd_signed_vma *local_got_refcounts;
1368 const Elf_Internal_Rela *rel, *relend;
1369
1370 if (info->relocatable)
1371 return TRUE;
1372
1373 htab = elf_s390_hash_table (info);
1374 if (htab == NULL)
1375 return FALSE;
1376
1377 elf_section_data (sec)->local_dynrel = NULL;
1378
1379 symtab_hdr = &elf_symtab_hdr (abfd);
1380 sym_hashes = elf_sym_hashes (abfd);
1381 local_got_refcounts = elf_local_got_refcounts (abfd);
1382
1383 relend = relocs + sec->reloc_count;
1384 for (rel = relocs; rel < relend; rel++)
1385 {
1386 unsigned long r_symndx;
1387 unsigned int r_type;
1388 struct elf_link_hash_entry *h = NULL;
1389
1390 r_symndx = ELF64_R_SYM (rel->r_info);
1391 if (r_symndx >= symtab_hdr->sh_info)
1392 {
1393 struct elf_s390_link_hash_entry *eh;
1394 struct elf_dyn_relocs **pp;
1395 struct elf_dyn_relocs *p;
1396
1397 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1398 while (h->root.type == bfd_link_hash_indirect
1399 || h->root.type == bfd_link_hash_warning)
1400 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1401 eh = (struct elf_s390_link_hash_entry *) h;
1402
1403 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1404 if (p->sec == sec)
1405 {
1406 /* Everything must go for SEC. */
1407 *pp = p->next;
1408 break;
1409 }
1410 }
1411 else
1412 {
1413 Elf_Internal_Sym *isym;
1414
1415 /* A local symbol. */
1416 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1417 abfd, r_symndx);
1418 if (isym == NULL)
1419 return FALSE;
1420
1421 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1422 {
1423 struct plt_entry *plt = elf_s390_local_plt (abfd);
1424 if (plt[r_symndx].plt.refcount > 0)
1425 plt[r_symndx].plt.refcount--;
1426 }
1427 }
1428
1429 r_type = ELF64_R_TYPE (rel->r_info);
1430 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1431 switch (r_type)
1432 {
1433 case R_390_TLS_LDM64:
1434 if (htab->tls_ldm_got.refcount > 0)
1435 htab->tls_ldm_got.refcount -= 1;
1436 break;
1437
1438 case R_390_TLS_GD64:
1439 case R_390_TLS_IE64:
1440 case R_390_TLS_GOTIE12:
1441 case R_390_TLS_GOTIE20:
1442 case R_390_TLS_GOTIE64:
1443 case R_390_TLS_IEENT:
1444 case R_390_GOT12:
1445 case R_390_GOT16:
1446 case R_390_GOT20:
1447 case R_390_GOT32:
1448 case R_390_GOT64:
1449 case R_390_GOTOFF16:
1450 case R_390_GOTOFF32:
1451 case R_390_GOTOFF64:
1452 case R_390_GOTPC:
1453 case R_390_GOTPCDBL:
1454 case R_390_GOTENT:
1455 if (h != NULL)
1456 {
1457 if (h->got.refcount > 0)
1458 h->got.refcount -= 1;
1459 }
1460 else if (local_got_refcounts != NULL)
1461 {
1462 if (local_got_refcounts[r_symndx] > 0)
1463 local_got_refcounts[r_symndx] -= 1;
1464 }
1465 break;
1466
1467 case R_390_8:
1468 case R_390_12:
1469 case R_390_16:
1470 case R_390_20:
1471 case R_390_32:
1472 case R_390_64:
1473 case R_390_PC16:
1474 case R_390_PC16DBL:
1475 case R_390_PC32:
1476 case R_390_PC32DBL:
1477 case R_390_PC64:
1478 if (info->shared)
1479 break;
1480 /* Fall through */
1481
1482 case R_390_PLT16DBL:
1483 case R_390_PLT32:
1484 case R_390_PLT32DBL:
1485 case R_390_PLT64:
1486 case R_390_PLTOFF16:
1487 case R_390_PLTOFF32:
1488 case R_390_PLTOFF64:
1489 if (h != NULL)
1490 {
1491 if (h->plt.refcount > 0)
1492 h->plt.refcount -= 1;
1493 }
1494 break;
1495
1496 case R_390_GOTPLT12:
1497 case R_390_GOTPLT16:
1498 case R_390_GOTPLT20:
1499 case R_390_GOTPLT32:
1500 case R_390_GOTPLT64:
1501 case R_390_GOTPLTENT:
1502 if (h != NULL)
1503 {
1504 if (h->plt.refcount > 0)
1505 {
1506 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1507 h->plt.refcount -= 1;
1508 }
1509 }
1510 else if (local_got_refcounts != NULL)
1511 {
1512 if (local_got_refcounts[r_symndx] > 0)
1513 local_got_refcounts[r_symndx] -= 1;
1514 }
1515 break;
1516
1517 default:
1518 break;
1519 }
1520 }
1521
1522 return TRUE;
1523 }
1524
1525 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1526 entry but we found we will not create any. Called when we find we will
1527 not have any PLT for this symbol, by for example
1528 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1529 or elf_s390_size_dynamic_sections if no dynamic sections will be
1530 created (we're only linking static objects). */
1531
1532 static void
1533 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1534 {
1535 if (h->elf.root.type == bfd_link_hash_warning)
1536 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1537
1538 if (h->gotplt_refcount <= 0)
1539 return;
1540
1541 /* We simply add the number of gotplt references to the number
1542 * of got references for this symbol. */
1543 h->elf.got.refcount += h->gotplt_refcount;
1544 h->gotplt_refcount = -1;
1545 }
1546
1547 /* Adjust a symbol defined by a dynamic object and referenced by a
1548 regular object. The current definition is in some section of the
1549 dynamic object, but we're not including those sections. We have to
1550 change the definition to something the rest of the link can
1551 understand. */
1552
1553 static bfd_boolean
1554 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1555 struct elf_link_hash_entry *h)
1556 {
1557 struct elf_s390_link_hash_table *htab;
1558 asection *s;
1559
1560 /* STT_GNU_IFUNC symbol must go through PLT. */
1561 if (s390_is_ifunc_symbol_p (h))
1562 return TRUE;
1563
1564 /* If this is a function, put it in the procedure linkage table. We
1565 will fill in the contents of the procedure linkage table later
1566 (although we could actually do it here). */
1567 if (h->type == STT_FUNC
1568 || h->needs_plt)
1569 {
1570 if (h->plt.refcount <= 0
1571 || SYMBOL_CALLS_LOCAL (info, h)
1572 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1573 && h->root.type == bfd_link_hash_undefweak))
1574 {
1575 /* This case can occur if we saw a PLT32 reloc in an input
1576 file, but the symbol was never referred to by a dynamic
1577 object, or if all references were garbage collected. In
1578 such a case, we don't actually need to build a procedure
1579 linkage table, and we can just do a PC32 reloc instead. */
1580 h->plt.offset = (bfd_vma) -1;
1581 h->needs_plt = 0;
1582 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1583 }
1584
1585 return TRUE;
1586 }
1587 else
1588 /* It's possible that we incorrectly decided a .plt reloc was
1589 needed for an R_390_PC32 reloc to a non-function sym in
1590 check_relocs. We can't decide accurately between function and
1591 non-function syms in check-relocs; Objects loaded later in
1592 the link may change h->type. So fix it now. */
1593 h->plt.offset = (bfd_vma) -1;
1594
1595 /* If this is a weak symbol, and there is a real definition, the
1596 processor independent code will have arranged for us to see the
1597 real definition first, and we can just use the same value. */
1598 if (h->u.weakdef != NULL)
1599 {
1600 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1601 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1602 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1603 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1604 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1605 h->non_got_ref = h->u.weakdef->non_got_ref;
1606 return TRUE;
1607 }
1608
1609 /* This is a reference to a symbol defined by a dynamic object which
1610 is not a function. */
1611
1612 /* If we are creating a shared library, we must presume that the
1613 only references to the symbol are via the global offset table.
1614 For such cases we need not do anything here; the relocations will
1615 be handled correctly by relocate_section. */
1616 if (info->shared)
1617 return TRUE;
1618
1619 /* If there are no references to this symbol that do not use the
1620 GOT, we don't need to generate a copy reloc. */
1621 if (!h->non_got_ref)
1622 return TRUE;
1623
1624 /* If -z nocopyreloc was given, we won't generate them either. */
1625 if (info->nocopyreloc)
1626 {
1627 h->non_got_ref = 0;
1628 return TRUE;
1629 }
1630
1631 if (ELIMINATE_COPY_RELOCS)
1632 {
1633 struct elf_s390_link_hash_entry * eh;
1634 struct elf_dyn_relocs *p;
1635
1636 eh = (struct elf_s390_link_hash_entry *) h;
1637 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1638 {
1639 s = p->sec->output_section;
1640 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1641 break;
1642 }
1643
1644 /* If we didn't find any dynamic relocs in read-only sections, then
1645 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1646 if (p == NULL)
1647 {
1648 h->non_got_ref = 0;
1649 return TRUE;
1650 }
1651 }
1652
1653 /* We must allocate the symbol in our .dynbss section, which will
1654 become part of the .bss section of the executable. There will be
1655 an entry for this symbol in the .dynsym section. The dynamic
1656 object will contain position independent code, so all references
1657 from the dynamic object to this symbol will go through the global
1658 offset table. The dynamic linker will use the .dynsym entry to
1659 determine the address it must put in the global offset table, so
1660 both the dynamic object and the regular object will refer to the
1661 same memory location for the variable. */
1662
1663 htab = elf_s390_hash_table (info);
1664 if (htab == NULL)
1665 return FALSE;
1666
1667 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1668 copy the initial value out of the dynamic object and into the
1669 runtime process image. */
1670 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1671 {
1672 htab->srelbss->size += sizeof (Elf64_External_Rela);
1673 h->needs_copy = 1;
1674 }
1675
1676 s = htab->sdynbss;
1677
1678 return _bfd_elf_adjust_dynamic_copy (h, s);
1679 }
1680
1681 /* Allocate space in .plt, .got and associated reloc sections for
1682 dynamic relocs. */
1683
1684 static bfd_boolean
1685 allocate_dynrelocs (struct elf_link_hash_entry *h,
1686 void * inf)
1687 {
1688 struct bfd_link_info *info;
1689 struct elf_s390_link_hash_table *htab;
1690 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1691 struct elf_dyn_relocs *p;
1692
1693 if (h->root.type == bfd_link_hash_indirect)
1694 return TRUE;
1695
1696 info = (struct bfd_link_info *) inf;
1697 htab = elf_s390_hash_table (info);
1698 if (htab == NULL)
1699 return FALSE;
1700
1701 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1702 here if it is defined and referenced in a non-shared object. */
1703 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1704 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1705 &eh->dyn_relocs);
1706 else if (htab->elf.dynamic_sections_created
1707 && h->plt.refcount > 0)
1708 {
1709 /* Make sure this symbol is output as a dynamic symbol.
1710 Undefined weak syms won't yet be marked as dynamic. */
1711 if (h->dynindx == -1
1712 && !h->forced_local)
1713 {
1714 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1715 return FALSE;
1716 }
1717
1718 if (info->shared
1719 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1720 {
1721 asection *s = htab->elf.splt;
1722
1723 /* If this is the first .plt entry, make room for the special
1724 first entry. */
1725 if (s->size == 0)
1726 s->size += PLT_FIRST_ENTRY_SIZE;
1727
1728 h->plt.offset = s->size;
1729
1730 /* If this symbol is not defined in a regular file, and we are
1731 not generating a shared library, then set the symbol to this
1732 location in the .plt. This is required to make function
1733 pointers compare as equal between the normal executable and
1734 the shared library. */
1735 if (! info->shared
1736 && !h->def_regular)
1737 {
1738 h->root.u.def.section = s;
1739 h->root.u.def.value = h->plt.offset;
1740 }
1741
1742 /* Make room for this entry. */
1743 s->size += PLT_ENTRY_SIZE;
1744
1745 /* We also need to make an entry in the .got.plt section, which
1746 will be placed in the .got section by the linker script. */
1747 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1748
1749 /* We also need to make an entry in the .rela.plt section. */
1750 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1751 }
1752 else
1753 {
1754 h->plt.offset = (bfd_vma) -1;
1755 h->needs_plt = 0;
1756 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1757 }
1758 }
1759 else
1760 {
1761 h->plt.offset = (bfd_vma) -1;
1762 h->needs_plt = 0;
1763 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1764 }
1765
1766 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1767 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1768 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1769 we can save the dynamic TLS relocation. */
1770 if (h->got.refcount > 0
1771 && !info->shared
1772 && h->dynindx == -1
1773 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1774 {
1775 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1776 /* For the GOTIE access without a literal pool entry the offset has
1777 to be stored somewhere. The immediate value in the instruction
1778 is not bit enough so the value is stored in the got. */
1779 {
1780 h->got.offset = htab->elf.sgot->size;
1781 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1782 }
1783 else
1784 h->got.offset = (bfd_vma) -1;
1785 }
1786 else if (h->got.refcount > 0)
1787 {
1788 asection *s;
1789 bfd_boolean dyn;
1790 int tls_type = elf_s390_hash_entry(h)->tls_type;
1791
1792 /* Make sure this symbol is output as a dynamic symbol.
1793 Undefined weak syms won't yet be marked as dynamic. */
1794 if (h->dynindx == -1
1795 && !h->forced_local)
1796 {
1797 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1798 return FALSE;
1799 }
1800
1801 s = htab->elf.sgot;
1802 h->got.offset = s->size;
1803 s->size += GOT_ENTRY_SIZE;
1804 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1805 if (tls_type == GOT_TLS_GD)
1806 s->size += GOT_ENTRY_SIZE;
1807 dyn = htab->elf.dynamic_sections_created;
1808 /* R_390_TLS_IE64 needs one dynamic relocation,
1809 R_390_TLS_GD64 needs one if local symbol and two if global. */
1810 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1811 || tls_type >= GOT_TLS_IE)
1812 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1813 else if (tls_type == GOT_TLS_GD)
1814 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1815 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1816 || h->root.type != bfd_link_hash_undefweak)
1817 && (info->shared
1818 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1819 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1820 }
1821 else
1822 h->got.offset = (bfd_vma) -1;
1823
1824 if (eh->dyn_relocs == NULL)
1825 return TRUE;
1826
1827 /* In the shared -Bsymbolic case, discard space allocated for
1828 dynamic pc-relative relocs against symbols which turn out to be
1829 defined in regular objects. For the normal shared case, discard
1830 space for pc-relative relocs that have become local due to symbol
1831 visibility changes. */
1832
1833 if (info->shared)
1834 {
1835 if (SYMBOL_CALLS_LOCAL (info, h))
1836 {
1837 struct elf_dyn_relocs **pp;
1838
1839 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1840 {
1841 p->count -= p->pc_count;
1842 p->pc_count = 0;
1843 if (p->count == 0)
1844 *pp = p->next;
1845 else
1846 pp = &p->next;
1847 }
1848 }
1849
1850 /* Also discard relocs on undefined weak syms with non-default
1851 visibility. */
1852 if (eh->dyn_relocs != NULL
1853 && h->root.type == bfd_link_hash_undefweak)
1854 {
1855 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1856 eh->dyn_relocs = NULL;
1857
1858 /* Make sure undefined weak symbols are output as a dynamic
1859 symbol in PIEs. */
1860 else if (h->dynindx == -1
1861 && !h->forced_local)
1862 {
1863 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1864 return FALSE;
1865 }
1866 }
1867 }
1868 else if (ELIMINATE_COPY_RELOCS)
1869 {
1870 /* For the non-shared case, discard space for relocs against
1871 symbols which turn out to need copy relocs or are not
1872 dynamic. */
1873
1874 if (!h->non_got_ref
1875 && ((h->def_dynamic
1876 && !h->def_regular)
1877 || (htab->elf.dynamic_sections_created
1878 && (h->root.type == bfd_link_hash_undefweak
1879 || h->root.type == bfd_link_hash_undefined))))
1880 {
1881 /* Make sure this symbol is output as a dynamic symbol.
1882 Undefined weak syms won't yet be marked as dynamic. */
1883 if (h->dynindx == -1
1884 && !h->forced_local)
1885 {
1886 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1887 return FALSE;
1888 }
1889
1890 /* If that succeeded, we know we'll be keeping all the
1891 relocs. */
1892 if (h->dynindx != -1)
1893 goto keep;
1894 }
1895
1896 eh->dyn_relocs = NULL;
1897
1898 keep: ;
1899 }
1900
1901 /* Finally, allocate space. */
1902 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1903 {
1904 asection *sreloc = elf_section_data (p->sec)->sreloc;
1905 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1906 }
1907
1908 return TRUE;
1909 }
1910
1911 /* Find any dynamic relocs that apply to read-only sections. */
1912
1913 static bfd_boolean
1914 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1915 {
1916 struct elf_s390_link_hash_entry *eh;
1917 struct elf_dyn_relocs *p;
1918
1919 eh = (struct elf_s390_link_hash_entry *) h;
1920 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1921 {
1922 asection *s = p->sec->output_section;
1923
1924 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1925 {
1926 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1927
1928 info->flags |= DF_TEXTREL;
1929
1930 /* Not an error, just cut short the traversal. */
1931 return FALSE;
1932 }
1933 }
1934 return TRUE;
1935 }
1936
1937 /* Set the sizes of the dynamic sections. */
1938
1939 static bfd_boolean
1940 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1941 struct bfd_link_info *info)
1942 {
1943 struct elf_s390_link_hash_table *htab;
1944 bfd *dynobj;
1945 asection *s;
1946 bfd_boolean relocs;
1947 bfd *ibfd;
1948
1949 htab = elf_s390_hash_table (info);
1950 if (htab == NULL)
1951 return FALSE;
1952
1953 dynobj = htab->elf.dynobj;
1954 if (dynobj == NULL)
1955 abort ();
1956
1957 if (htab->elf.dynamic_sections_created)
1958 {
1959 /* Set the contents of the .interp section to the interpreter. */
1960 if (info->executable)
1961 {
1962 s = bfd_get_linker_section (dynobj, ".interp");
1963 if (s == NULL)
1964 abort ();
1965 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1966 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1967 }
1968 }
1969
1970 /* Set up .got offsets for local syms, and space for local dynamic
1971 relocs. */
1972 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1973 {
1974 bfd_signed_vma *local_got;
1975 bfd_signed_vma *end_local_got;
1976 char *local_tls_type;
1977 bfd_size_type locsymcount;
1978 Elf_Internal_Shdr *symtab_hdr;
1979 asection *srela;
1980 struct plt_entry *local_plt;
1981 unsigned int i;
1982
1983 if (! is_s390_elf (ibfd))
1984 continue;
1985
1986 for (s = ibfd->sections; s != NULL; s = s->next)
1987 {
1988 struct elf_dyn_relocs *p;
1989
1990 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1991 {
1992 if (!bfd_is_abs_section (p->sec)
1993 && bfd_is_abs_section (p->sec->output_section))
1994 {
1995 /* Input section has been discarded, either because
1996 it is a copy of a linkonce section or due to
1997 linker script /DISCARD/, so we'll be discarding
1998 the relocs too. */
1999 }
2000 else if (p->count != 0)
2001 {
2002 srela = elf_section_data (p->sec)->sreloc;
2003 srela->size += p->count * sizeof (Elf64_External_Rela);
2004 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2005 info->flags |= DF_TEXTREL;
2006 }
2007 }
2008 }
2009
2010 local_got = elf_local_got_refcounts (ibfd);
2011 if (!local_got)
2012 continue;
2013
2014 symtab_hdr = &elf_symtab_hdr (ibfd);
2015 locsymcount = symtab_hdr->sh_info;
2016 end_local_got = local_got + locsymcount;
2017 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2018 s = htab->elf.sgot;
2019 srela = htab->elf.srelgot;
2020 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2021 {
2022 if (*local_got > 0)
2023 {
2024 *local_got = s->size;
2025 s->size += GOT_ENTRY_SIZE;
2026 if (*local_tls_type == GOT_TLS_GD)
2027 s->size += GOT_ENTRY_SIZE;
2028 if (info->shared)
2029 srela->size += sizeof (Elf64_External_Rela);
2030 }
2031 else
2032 *local_got = (bfd_vma) -1;
2033 }
2034
2035 local_plt = elf_s390_local_plt (ibfd);
2036 for (i = 0; i < symtab_hdr->sh_info; i++)
2037 {
2038 if (local_plt[i].plt.refcount > 0)
2039 {
2040 local_plt[i].plt.offset = htab->elf.iplt->size;
2041 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2042 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2043 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2044 }
2045 else
2046 local_plt[i].plt.offset = (bfd_vma) -1;
2047 }
2048 }
2049
2050 if (htab->tls_ldm_got.refcount > 0)
2051 {
2052 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2053 relocs. */
2054 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2055 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2056 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2057 }
2058 else
2059 htab->tls_ldm_got.offset = -1;
2060
2061 /* Allocate global sym .plt and .got entries, and space for global
2062 sym dynamic relocs. */
2063 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2064
2065 /* We now have determined the sizes of the various dynamic sections.
2066 Allocate memory for them. */
2067 relocs = FALSE;
2068 for (s = dynobj->sections; s != NULL; s = s->next)
2069 {
2070 if ((s->flags & SEC_LINKER_CREATED) == 0)
2071 continue;
2072
2073 if (s == htab->elf.splt
2074 || s == htab->elf.sgot
2075 || s == htab->elf.sgotplt
2076 || s == htab->sdynbss
2077 || s == htab->elf.iplt
2078 || s == htab->elf.igotplt
2079 || s == htab->irelifunc)
2080 {
2081 /* Strip this section if we don't need it; see the
2082 comment below. */
2083 }
2084 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2085 {
2086 if (s->size != 0 && s != htab->elf.srelplt)
2087 relocs = TRUE;
2088
2089 /* We use the reloc_count field as a counter if we need
2090 to copy relocs into the output file. */
2091 s->reloc_count = 0;
2092 }
2093 else
2094 {
2095 /* It's not one of our sections, so don't allocate space. */
2096 continue;
2097 }
2098
2099 if (s->size == 0)
2100 {
2101 /* If we don't need this section, strip it from the
2102 output file. This is to handle .rela.bss and
2103 .rela.plt. We must create it in
2104 create_dynamic_sections, because it must be created
2105 before the linker maps input sections to output
2106 sections. The linker does that before
2107 adjust_dynamic_symbol is called, and it is that
2108 function which decides whether anything needs to go
2109 into these sections. */
2110
2111 s->flags |= SEC_EXCLUDE;
2112 continue;
2113 }
2114
2115 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2116 continue;
2117
2118 /* Allocate memory for the section contents. We use bfd_zalloc
2119 here in case unused entries are not reclaimed before the
2120 section's contents are written out. This should not happen,
2121 but this way if it does, we get a R_390_NONE reloc instead
2122 of garbage. */
2123 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2124 if (s->contents == NULL)
2125 return FALSE;
2126 }
2127
2128 if (htab->elf.dynamic_sections_created)
2129 {
2130 /* Add some entries to the .dynamic section. We fill in the
2131 values later, in elf_s390_finish_dynamic_sections, but we
2132 must add the entries now so that we get the correct size for
2133 the .dynamic section. The DT_DEBUG entry is filled in by the
2134 dynamic linker and used by the debugger. */
2135 #define add_dynamic_entry(TAG, VAL) \
2136 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2137
2138 if (info->executable)
2139 {
2140 if (!add_dynamic_entry (DT_DEBUG, 0))
2141 return FALSE;
2142 }
2143
2144 if (htab->elf.splt->size != 0)
2145 {
2146 if (!add_dynamic_entry (DT_PLTGOT, 0)
2147 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2148 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2149 || !add_dynamic_entry (DT_JMPREL, 0))
2150 return FALSE;
2151 }
2152
2153 if (relocs)
2154 {
2155 if (!add_dynamic_entry (DT_RELA, 0)
2156 || !add_dynamic_entry (DT_RELASZ, 0)
2157 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2158 return FALSE;
2159
2160 /* If any dynamic relocs apply to a read-only section,
2161 then we need a DT_TEXTREL entry. */
2162 if ((info->flags & DF_TEXTREL) == 0)
2163 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2164 info);
2165
2166 if ((info->flags & DF_TEXTREL) != 0)
2167 {
2168 if (!add_dynamic_entry (DT_TEXTREL, 0))
2169 return FALSE;
2170 }
2171 }
2172 }
2173 #undef add_dynamic_entry
2174
2175 return TRUE;
2176 }
2177
2178 /* Return the base VMA address which should be subtracted from real addresses
2179 when resolving @dtpoff relocation.
2180 This is PT_TLS segment p_vaddr. */
2181
2182 static bfd_vma
2183 dtpoff_base (struct bfd_link_info *info)
2184 {
2185 /* If tls_sec is NULL, we should have signalled an error already. */
2186 if (elf_hash_table (info)->tls_sec == NULL)
2187 return 0;
2188 return elf_hash_table (info)->tls_sec->vma;
2189 }
2190
2191 /* Return the relocation value for @tpoff relocation
2192 if STT_TLS virtual address is ADDRESS. */
2193
2194 static bfd_vma
2195 tpoff (struct bfd_link_info *info, bfd_vma address)
2196 {
2197 struct elf_link_hash_table *htab = elf_hash_table (info);
2198
2199 /* If tls_sec is NULL, we should have signalled an error already. */
2200 if (htab->tls_sec == NULL)
2201 return 0;
2202 return htab->tls_size + htab->tls_sec->vma - address;
2203 }
2204
2205 /* Complain if TLS instruction relocation is against an invalid
2206 instruction. */
2207
2208 static void
2209 invalid_tls_insn (bfd *input_bfd,
2210 asection *input_section,
2211 Elf_Internal_Rela *rel)
2212 {
2213 reloc_howto_type *howto;
2214
2215 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2216 (*_bfd_error_handler)
2217 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2218 input_bfd,
2219 input_section,
2220 (long) rel->r_offset,
2221 howto->name);
2222 bfd_set_error (bfd_error_bad_value);
2223 }
2224
2225 /* Relocate a 390 ELF section. */
2226
2227 static bfd_boolean
2228 elf_s390_relocate_section (bfd *output_bfd,
2229 struct bfd_link_info *info,
2230 bfd *input_bfd,
2231 asection *input_section,
2232 bfd_byte *contents,
2233 Elf_Internal_Rela *relocs,
2234 Elf_Internal_Sym *local_syms,
2235 asection **local_sections)
2236 {
2237 struct elf_s390_link_hash_table *htab;
2238 Elf_Internal_Shdr *symtab_hdr;
2239 struct elf_link_hash_entry **sym_hashes;
2240 bfd_vma *local_got_offsets;
2241 Elf_Internal_Rela *rel;
2242 Elf_Internal_Rela *relend;
2243
2244 BFD_ASSERT (is_s390_elf (input_bfd));
2245
2246 htab = elf_s390_hash_table (info);
2247 if (htab == NULL)
2248 return FALSE;
2249
2250 symtab_hdr = &elf_symtab_hdr (input_bfd);
2251 sym_hashes = elf_sym_hashes (input_bfd);
2252 local_got_offsets = elf_local_got_offsets (input_bfd);
2253
2254 rel = relocs;
2255 relend = relocs + input_section->reloc_count;
2256 for (; rel < relend; rel++)
2257 {
2258 unsigned int r_type;
2259 reloc_howto_type *howto;
2260 unsigned long r_symndx;
2261 struct elf_link_hash_entry *h;
2262 Elf_Internal_Sym *sym;
2263 asection *sec;
2264 bfd_vma off;
2265 bfd_vma relocation;
2266 bfd_boolean unresolved_reloc;
2267 bfd_reloc_status_type r;
2268 int tls_type;
2269 asection *base_got = htab->elf.sgot;
2270
2271 r_type = ELF64_R_TYPE (rel->r_info);
2272 if (r_type == (int) R_390_GNU_VTINHERIT
2273 || r_type == (int) R_390_GNU_VTENTRY)
2274 continue;
2275 if (r_type >= (int) R_390_max)
2276 {
2277 bfd_set_error (bfd_error_bad_value);
2278 return FALSE;
2279 }
2280
2281 howto = elf_howto_table + r_type;
2282 r_symndx = ELF64_R_SYM (rel->r_info);
2283
2284 h = NULL;
2285 sym = NULL;
2286 sec = NULL;
2287 unresolved_reloc = FALSE;
2288 if (r_symndx < symtab_hdr->sh_info)
2289 {
2290 sym = local_syms + r_symndx;
2291 sec = local_sections[r_symndx];
2292
2293 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2294 {
2295 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2296 if (local_plt == NULL)
2297 return FALSE;
2298
2299 /* Address of the PLT slot. */
2300 relocation = (htab->elf.iplt->output_section->vma
2301 + htab->elf.iplt->output_offset
2302 + local_plt[r_symndx].plt.offset);
2303
2304 switch (r_type)
2305 {
2306 case R_390_PLTOFF16:
2307 case R_390_PLTOFF32:
2308 case R_390_PLTOFF64:
2309 relocation -= htab->elf.sgot->output_section->vma;
2310 break;
2311 case R_390_GOTPLT12:
2312 case R_390_GOTPLT16:
2313 case R_390_GOTPLT20:
2314 case R_390_GOTPLT32:
2315 case R_390_GOTPLT64:
2316 case R_390_GOTPLTENT:
2317 case R_390_GOT12:
2318 case R_390_GOT16:
2319 case R_390_GOT20:
2320 case R_390_GOT32:
2321 case R_390_GOT64:
2322 case R_390_GOTENT:
2323 {
2324 /* Write the PLT slot address into the GOT slot. */
2325 bfd_put_64 (output_bfd, relocation,
2326 htab->elf.sgot->contents +
2327 local_got_offsets[r_symndx]);
2328 relocation = (local_got_offsets[r_symndx] +
2329 htab->elf.sgot->output_offset);
2330
2331 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2332 relocation += htab->elf.sgot->output_section->vma;
2333 break;
2334 }
2335 default:
2336 break;
2337 }
2338 /* The output section is needed later in
2339 finish_dynamic_section when creating the dynamic
2340 relocation. */
2341 local_plt[r_symndx].sec = sec;
2342 goto do_relocation;
2343 }
2344 else
2345 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2346 }
2347 else
2348 {
2349 bfd_boolean warned ATTRIBUTE_UNUSED;
2350
2351 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2352 r_symndx, symtab_hdr, sym_hashes,
2353 h, sec, relocation,
2354 unresolved_reloc, warned);
2355 }
2356
2357 if (sec != NULL && discarded_section (sec))
2358 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2359 rel, 1, relend, howto, 0, contents);
2360
2361 if (info->relocatable)
2362 continue;
2363
2364 switch (r_type)
2365 {
2366 case R_390_GOTPLT12:
2367 case R_390_GOTPLT16:
2368 case R_390_GOTPLT20:
2369 case R_390_GOTPLT32:
2370 case R_390_GOTPLT64:
2371 case R_390_GOTPLTENT:
2372 /* There are three cases for a GOTPLT relocation. 1) The
2373 relocation is against the jump slot entry of a plt that
2374 will get emitted to the output file. 2) The relocation
2375 is against the jump slot of a plt entry that has been
2376 removed. elf_s390_adjust_gotplt has created a GOT entry
2377 as replacement. 3) The relocation is against a local symbol.
2378 Cases 2) and 3) are the same as the GOT relocation code
2379 so we just have to test for case 1 and fall through for
2380 the other two. */
2381 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2382 {
2383 bfd_vma plt_index;
2384
2385 if (s390_is_ifunc_symbol_p (h))
2386 {
2387 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2388 relocation = (plt_index * GOT_ENTRY_SIZE +
2389 htab->elf.igotplt->output_offset);
2390 if (r_type == R_390_GOTPLTENT)
2391 relocation += htab->elf.igotplt->output_section->vma;
2392 }
2393 else
2394 {
2395 /* Calc. index no.
2396 Current offset - size first entry / entry size. */
2397 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2398 PLT_ENTRY_SIZE;
2399
2400 /* Offset in GOT is PLT index plus GOT headers(3)
2401 times 4, addr & GOT addr. */
2402 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2403 if (r_type == R_390_GOTPLTENT)
2404 relocation += htab->elf.sgot->output_section->vma;
2405 }
2406 unresolved_reloc = FALSE;
2407 break;
2408 }
2409 /* Fall through. */
2410
2411 case R_390_GOT12:
2412 case R_390_GOT16:
2413 case R_390_GOT20:
2414 case R_390_GOT32:
2415 case R_390_GOT64:
2416 case R_390_GOTENT:
2417 /* Relocation is to the entry for this symbol in the global
2418 offset table. */
2419 if (base_got == NULL)
2420 abort ();
2421
2422 if (h != NULL)
2423 {
2424 bfd_boolean dyn;
2425
2426 off = h->got.offset;
2427 dyn = htab->elf.dynamic_sections_created;
2428
2429 if (s390_is_ifunc_symbol_p (h))
2430 {
2431 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2432 if (off == (bfd_vma)-1)
2433 {
2434 /* No explicit GOT usage so redirect to the
2435 got.iplt slot. */
2436 base_got = htab->elf.igotplt;
2437 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2438 }
2439 else
2440 {
2441 /* Explicit GOT slots must contain the address
2442 of the PLT slot. This will be handled in
2443 finish_dynamic_symbol. */
2444 }
2445 }
2446 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2447 || (info->shared
2448 && SYMBOL_REFERENCES_LOCAL (info, h))
2449 || (ELF_ST_VISIBILITY (h->other)
2450 && h->root.type == bfd_link_hash_undefweak))
2451 {
2452 /* This is actually a static link, or it is a
2453 -Bsymbolic link and the symbol is defined
2454 locally, or the symbol was forced to be local
2455 because of a version file. We must initialize
2456 this entry in the global offset table. Since the
2457 offset must always be a multiple of 2, we use the
2458 least significant bit to record whether we have
2459 initialized it already.
2460
2461 When doing a dynamic link, we create a .rel.got
2462 relocation entry to initialize the value. This
2463 is done in the finish_dynamic_symbol routine. */
2464 if ((off & 1) != 0)
2465 off &= ~1;
2466 else
2467 {
2468 bfd_put_64 (output_bfd, relocation,
2469 base_got->contents + off);
2470 h->got.offset |= 1;
2471 }
2472 }
2473 else
2474 unresolved_reloc = FALSE;
2475 }
2476 else
2477 {
2478 if (local_got_offsets == NULL)
2479 abort ();
2480
2481 off = local_got_offsets[r_symndx];
2482
2483 /* The offset must always be a multiple of 8. We use
2484 the least significant bit to record whether we have
2485 already generated the necessary reloc. */
2486 if ((off & 1) != 0)
2487 off &= ~1;
2488 else
2489 {
2490 bfd_put_64 (output_bfd, relocation,
2491 htab->elf.sgot->contents + off);
2492
2493 if (info->shared)
2494 {
2495 asection *s;
2496 Elf_Internal_Rela outrel;
2497 bfd_byte *loc;
2498
2499 s = htab->elf.srelgot;
2500 if (s == NULL)
2501 abort ();
2502
2503 outrel.r_offset = (htab->elf.sgot->output_section->vma
2504 + htab->elf.sgot->output_offset
2505 + off);
2506 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2507 outrel.r_addend = relocation;
2508 loc = s->contents;
2509 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2510 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2511 }
2512
2513 local_got_offsets[r_symndx] |= 1;
2514 }
2515 }
2516
2517 if (off >= (bfd_vma) -2)
2518 abort ();
2519
2520 relocation = base_got->output_offset + off;
2521
2522 /* For @GOTENT the relocation is against the offset between
2523 the instruction and the symbols entry in the GOT and not
2524 between the start of the GOT and the symbols entry. We
2525 add the vma of the GOT to get the correct value. */
2526 if ( r_type == R_390_GOTENT
2527 || r_type == R_390_GOTPLTENT)
2528 relocation += base_got->output_section->vma;
2529
2530 break;
2531
2532 case R_390_GOTOFF16:
2533 case R_390_GOTOFF32:
2534 case R_390_GOTOFF64:
2535 /* Relocation is relative to the start of the global offset
2536 table. */
2537
2538 /* Note that sgot->output_offset is not involved in this
2539 calculation. We always want the start of .got. If we
2540 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2541 permitted by the ABI, we might have to change this
2542 calculation. */
2543 relocation -= htab->elf.sgot->output_section->vma;
2544 break;
2545
2546 case R_390_GOTPC:
2547 case R_390_GOTPCDBL:
2548 /* Use global offset table as symbol value. */
2549 relocation = htab->elf.sgot->output_section->vma;
2550 unresolved_reloc = FALSE;
2551 break;
2552
2553 case R_390_PLT16DBL:
2554 case R_390_PLT32:
2555 case R_390_PLT32DBL:
2556 case R_390_PLT64:
2557 /* Relocation is to the entry for this symbol in the
2558 procedure linkage table. */
2559
2560 /* Resolve a PLT32 reloc against a local symbol directly,
2561 without using the procedure linkage table. */
2562 if (h == NULL)
2563 break;
2564
2565 if (h->plt.offset == (bfd_vma) -1
2566 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2567 {
2568 /* We didn't make a PLT entry for this symbol. This
2569 happens when statically linking PIC code, or when
2570 using -Bsymbolic. */
2571 break;
2572 }
2573 if (s390_is_ifunc_symbol_p (h))
2574 relocation = (htab->elf.iplt->output_section->vma
2575 + htab->elf.iplt->output_offset
2576 + h->plt.offset);
2577 else
2578 relocation = (htab->elf.splt->output_section->vma
2579 + htab->elf.splt->output_offset
2580 + h->plt.offset);
2581 unresolved_reloc = FALSE;
2582 break;
2583
2584 case R_390_PLTOFF16:
2585 case R_390_PLTOFF32:
2586 case R_390_PLTOFF64:
2587 /* Relocation is to the entry for this symbol in the
2588 procedure linkage table relative to the start of the GOT. */
2589
2590 /* For local symbols or if we didn't make a PLT entry for
2591 this symbol resolve the symbol directly. */
2592 if (h == NULL
2593 || h->plt.offset == (bfd_vma) -1
2594 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2595 {
2596 relocation -= htab->elf.sgot->output_section->vma;
2597 break;
2598 }
2599
2600 if (s390_is_ifunc_symbol_p (h))
2601 relocation = (htab->elf.iplt->output_section->vma
2602 + htab->elf.iplt->output_offset
2603 + h->plt.offset
2604 - htab->elf.sgot->output_section->vma);
2605 else
2606 relocation = (htab->elf.splt->output_section->vma
2607 + htab->elf.splt->output_offset
2608 + h->plt.offset
2609 - htab->elf.sgot->output_section->vma);
2610 unresolved_reloc = FALSE;
2611 break;
2612
2613 case R_390_8:
2614 case R_390_16:
2615 case R_390_32:
2616 case R_390_64:
2617 case R_390_PC16:
2618 case R_390_PC16DBL:
2619 case R_390_PC32:
2620 case R_390_PC32DBL:
2621 case R_390_PC64:
2622
2623 if (h != NULL
2624 && s390_is_ifunc_symbol_p (h)
2625 && h->def_regular)
2626 {
2627 if (!info->shared || !h->non_got_ref)
2628 {
2629 /* For a non-shared object STT_GNU_IFUNC symbol must
2630 go through PLT. */
2631 relocation = (htab->elf.iplt->output_section->vma
2632 + htab->elf.iplt->output_offset
2633 + h ->plt.offset);
2634 goto do_relocation;
2635 }
2636 else
2637 {
2638 /* For shared objects a runtime relocation is needed. */
2639
2640 Elf_Internal_Rela outrel;
2641 asection *sreloc;
2642
2643 /* Need a dynamic relocation to get the real function
2644 address. */
2645 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2646 info,
2647 input_section,
2648 rel->r_offset);
2649 if (outrel.r_offset == (bfd_vma) -1
2650 || outrel.r_offset == (bfd_vma) -2)
2651 abort ();
2652
2653 outrel.r_offset += (input_section->output_section->vma
2654 + input_section->output_offset);
2655
2656 if (h->dynindx == -1
2657 || h->forced_local
2658 || info->executable)
2659 {
2660 /* This symbol is resolved locally. */
2661 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2662 outrel.r_addend = (h->root.u.def.value
2663 + h->root.u.def.section->output_section->vma
2664 + h->root.u.def.section->output_offset);
2665 }
2666 else
2667 {
2668 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2669 outrel.r_addend = 0;
2670 }
2671
2672 sreloc = htab->elf.irelifunc;
2673 elf_append_rela (output_bfd, sreloc, &outrel);
2674
2675 /* If this reloc is against an external symbol, we
2676 do not want to fiddle with the addend. Otherwise,
2677 we need to include the symbol value so that it
2678 becomes an addend for the dynamic reloc. For an
2679 internal symbol, we have updated addend. */
2680 continue;
2681 }
2682 }
2683
2684 if ((input_section->flags & SEC_ALLOC) == 0)
2685 break;
2686
2687 if ((info->shared
2688 && (h == NULL
2689 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2690 || h->root.type != bfd_link_hash_undefweak)
2691 && ((r_type != R_390_PC16
2692 && r_type != R_390_PC16DBL
2693 && r_type != R_390_PC32
2694 && r_type != R_390_PC32DBL
2695 && r_type != R_390_PC64)
2696 || !SYMBOL_CALLS_LOCAL (info, h)))
2697 || (ELIMINATE_COPY_RELOCS
2698 && !info->shared
2699 && h != NULL
2700 && h->dynindx != -1
2701 && !h->non_got_ref
2702 && ((h->def_dynamic
2703 && !h->def_regular)
2704 || h->root.type == bfd_link_hash_undefweak
2705 || h->root.type == bfd_link_hash_undefined)))
2706 {
2707 Elf_Internal_Rela outrel;
2708 bfd_boolean skip, relocate;
2709 asection *sreloc;
2710 bfd_byte *loc;
2711
2712 /* When generating a shared object, these relocations
2713 are copied into the output file to be resolved at run
2714 time. */
2715 skip = FALSE;
2716 relocate = FALSE;
2717
2718 outrel.r_offset =
2719 _bfd_elf_section_offset (output_bfd, info, input_section,
2720 rel->r_offset);
2721 if (outrel.r_offset == (bfd_vma) -1)
2722 skip = TRUE;
2723 else if (outrel.r_offset == (bfd_vma) -2)
2724 skip = TRUE, relocate = TRUE;
2725
2726 outrel.r_offset += (input_section->output_section->vma
2727 + input_section->output_offset);
2728
2729 if (skip)
2730 memset (&outrel, 0, sizeof outrel);
2731 else if (h != NULL
2732 && h->dynindx != -1
2733 && (r_type == R_390_PC16
2734 || r_type == R_390_PC16DBL
2735 || r_type == R_390_PC32
2736 || r_type == R_390_PC32DBL
2737 || r_type == R_390_PC64
2738 || !info->shared
2739 || !SYMBOLIC_BIND (info, h)
2740 || !h->def_regular))
2741 {
2742 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2743 outrel.r_addend = rel->r_addend;
2744 }
2745 else
2746 {
2747 /* This symbol is local, or marked to become local. */
2748 outrel.r_addend = relocation + rel->r_addend;
2749 if (r_type == R_390_64)
2750 {
2751 relocate = TRUE;
2752 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2753 }
2754 else
2755 {
2756 long sindx;
2757
2758 if (bfd_is_abs_section (sec))
2759 sindx = 0;
2760 else if (sec == NULL || sec->owner == NULL)
2761 {
2762 bfd_set_error(bfd_error_bad_value);
2763 return FALSE;
2764 }
2765 else
2766 {
2767 asection *osec;
2768
2769 osec = sec->output_section;
2770 sindx = elf_section_data (osec)->dynindx;
2771
2772 if (sindx == 0)
2773 {
2774 osec = htab->elf.text_index_section;
2775 sindx = elf_section_data (osec)->dynindx;
2776 }
2777 BFD_ASSERT (sindx != 0);
2778
2779 /* We are turning this relocation into one
2780 against a section symbol, so subtract out
2781 the output section's address but not the
2782 offset of the input section in the output
2783 section. */
2784 outrel.r_addend -= osec->vma;
2785 }
2786 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2787 }
2788 }
2789
2790 sreloc = elf_section_data (input_section)->sreloc;
2791 if (sreloc == NULL)
2792 abort ();
2793
2794 loc = sreloc->contents;
2795 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2796 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2797
2798 /* If this reloc is against an external symbol, we do
2799 not want to fiddle with the addend. Otherwise, we
2800 need to include the symbol value so that it becomes
2801 an addend for the dynamic reloc. */
2802 if (! relocate)
2803 continue;
2804 }
2805
2806 break;
2807
2808 /* Relocations for tls literal pool entries. */
2809 case R_390_TLS_IE64:
2810 if (info->shared)
2811 {
2812 Elf_Internal_Rela outrel;
2813 asection *sreloc;
2814 bfd_byte *loc;
2815
2816 outrel.r_offset = rel->r_offset
2817 + input_section->output_section->vma
2818 + input_section->output_offset;
2819 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2820 sreloc = elf_section_data (input_section)->sreloc;
2821 if (sreloc == NULL)
2822 abort ();
2823 loc = sreloc->contents;
2824 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2825 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2826 }
2827 /* Fall through. */
2828
2829 case R_390_TLS_GD64:
2830 case R_390_TLS_GOTIE64:
2831 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2832 tls_type = GOT_UNKNOWN;
2833 if (h == NULL && local_got_offsets)
2834 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2835 else if (h != NULL)
2836 {
2837 tls_type = elf_s390_hash_entry(h)->tls_type;
2838 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2839 r_type = R_390_TLS_LE64;
2840 }
2841 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2842 r_type = R_390_TLS_IE64;
2843
2844 if (r_type == R_390_TLS_LE64)
2845 {
2846 /* This relocation gets optimized away by the local exec
2847 access optimization. */
2848 BFD_ASSERT (! unresolved_reloc);
2849 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2850 contents + rel->r_offset);
2851 continue;
2852 }
2853
2854 if (htab->elf.sgot == NULL)
2855 abort ();
2856
2857 if (h != NULL)
2858 off = h->got.offset;
2859 else
2860 {
2861 if (local_got_offsets == NULL)
2862 abort ();
2863
2864 off = local_got_offsets[r_symndx];
2865 }
2866
2867 emit_tls_relocs:
2868
2869 if ((off & 1) != 0)
2870 off &= ~1;
2871 else
2872 {
2873 Elf_Internal_Rela outrel;
2874 bfd_byte *loc;
2875 int dr_type, indx;
2876
2877 if (htab->elf.srelgot == NULL)
2878 abort ();
2879
2880 outrel.r_offset = (htab->elf.sgot->output_section->vma
2881 + htab->elf.sgot->output_offset + off);
2882
2883 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2884 if (r_type == R_390_TLS_GD64)
2885 dr_type = R_390_TLS_DTPMOD;
2886 else
2887 dr_type = R_390_TLS_TPOFF;
2888 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2889 outrel.r_addend = relocation - dtpoff_base (info);
2890 else
2891 outrel.r_addend = 0;
2892 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2893 loc = htab->elf.srelgot->contents;
2894 loc += htab->elf.srelgot->reloc_count++
2895 * sizeof (Elf64_External_Rela);
2896 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2897
2898 if (r_type == R_390_TLS_GD64)
2899 {
2900 if (indx == 0)
2901 {
2902 BFD_ASSERT (! unresolved_reloc);
2903 bfd_put_64 (output_bfd,
2904 relocation - dtpoff_base (info),
2905 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2906 }
2907 else
2908 {
2909 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2910 outrel.r_offset += GOT_ENTRY_SIZE;
2911 outrel.r_addend = 0;
2912 htab->elf.srelgot->reloc_count++;
2913 loc += sizeof (Elf64_External_Rela);
2914 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2915 }
2916 }
2917
2918 if (h != NULL)
2919 h->got.offset |= 1;
2920 else
2921 local_got_offsets[r_symndx] |= 1;
2922 }
2923
2924 if (off >= (bfd_vma) -2)
2925 abort ();
2926 if (r_type == ELF64_R_TYPE (rel->r_info))
2927 {
2928 relocation = htab->elf.sgot->output_offset + off;
2929 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2930 relocation += htab->elf.sgot->output_section->vma;
2931 unresolved_reloc = FALSE;
2932 }
2933 else
2934 {
2935 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2936 contents + rel->r_offset);
2937 continue;
2938 }
2939 break;
2940
2941 case R_390_TLS_GOTIE12:
2942 case R_390_TLS_GOTIE20:
2943 case R_390_TLS_IEENT:
2944 if (h == NULL)
2945 {
2946 if (local_got_offsets == NULL)
2947 abort();
2948 off = local_got_offsets[r_symndx];
2949 if (info->shared)
2950 goto emit_tls_relocs;
2951 }
2952 else
2953 {
2954 off = h->got.offset;
2955 tls_type = elf_s390_hash_entry(h)->tls_type;
2956 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2957 goto emit_tls_relocs;
2958 }
2959
2960 if (htab->elf.sgot == NULL)
2961 abort ();
2962
2963 BFD_ASSERT (! unresolved_reloc);
2964 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2965 htab->elf.sgot->contents + off);
2966 relocation = htab->elf.sgot->output_offset + off;
2967 if (r_type == R_390_TLS_IEENT)
2968 relocation += htab->elf.sgot->output_section->vma;
2969 unresolved_reloc = FALSE;
2970 break;
2971
2972 case R_390_TLS_LDM64:
2973 if (! info->shared)
2974 /* The literal pool entry this relocation refers to gets ignored
2975 by the optimized code of the local exec model. Do nothing
2976 and the value will turn out zero. */
2977 continue;
2978
2979 if (htab->elf.sgot == NULL)
2980 abort ();
2981
2982 off = htab->tls_ldm_got.offset;
2983 if (off & 1)
2984 off &= ~1;
2985 else
2986 {
2987 Elf_Internal_Rela outrel;
2988 bfd_byte *loc;
2989
2990 if (htab->elf.srelgot == NULL)
2991 abort ();
2992
2993 outrel.r_offset = (htab->elf.sgot->output_section->vma
2994 + htab->elf.sgot->output_offset + off);
2995
2996 bfd_put_64 (output_bfd, 0,
2997 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2998 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2999 outrel.r_addend = 0;
3000 loc = htab->elf.srelgot->contents;
3001 loc += htab->elf.srelgot->reloc_count++
3002 * sizeof (Elf64_External_Rela);
3003 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3004 htab->tls_ldm_got.offset |= 1;
3005 }
3006 relocation = htab->elf.sgot->output_offset + off;
3007 unresolved_reloc = FALSE;
3008 break;
3009
3010 case R_390_TLS_LE64:
3011 if (info->shared)
3012 {
3013 /* Linking a shared library with non-fpic code requires
3014 a R_390_TLS_TPOFF relocation. */
3015 Elf_Internal_Rela outrel;
3016 asection *sreloc;
3017 bfd_byte *loc;
3018 int indx;
3019
3020 outrel.r_offset = rel->r_offset
3021 + input_section->output_section->vma
3022 + input_section->output_offset;
3023 if (h != NULL && h->dynindx != -1)
3024 indx = h->dynindx;
3025 else
3026 indx = 0;
3027 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3028 if (indx == 0)
3029 outrel.r_addend = relocation - dtpoff_base (info);
3030 else
3031 outrel.r_addend = 0;
3032 sreloc = elf_section_data (input_section)->sreloc;
3033 if (sreloc == NULL)
3034 abort ();
3035 loc = sreloc->contents;
3036 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3037 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3038 }
3039 else
3040 {
3041 BFD_ASSERT (! unresolved_reloc);
3042 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3043 contents + rel->r_offset);
3044 }
3045 continue;
3046
3047 case R_390_TLS_LDO64:
3048 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3049 relocation -= dtpoff_base (info);
3050 else
3051 /* When converting LDO to LE, we must negate. */
3052 relocation = -tpoff (info, relocation);
3053 break;
3054
3055 /* Relocations for tls instructions. */
3056 case R_390_TLS_LOAD:
3057 case R_390_TLS_GDCALL:
3058 case R_390_TLS_LDCALL:
3059 tls_type = GOT_UNKNOWN;
3060 if (h == NULL && local_got_offsets)
3061 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3062 else if (h != NULL)
3063 tls_type = elf_s390_hash_entry(h)->tls_type;
3064
3065 if (tls_type == GOT_TLS_GD)
3066 continue;
3067
3068 if (r_type == R_390_TLS_LOAD)
3069 {
3070 if (!info->shared && (h == NULL || h->dynindx == -1))
3071 {
3072 /* IE->LE transition. Four valid cases:
3073 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3074 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3075 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3076 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3077 unsigned int insn0, insn1, ry;
3078
3079 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3080 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3081 if (insn1 != 0x0004)
3082 invalid_tls_insn (input_bfd, input_section, rel);
3083 ry = 0;
3084 if ((insn0 & 0xff00f000) == 0xe3000000)
3085 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3086 ry = (insn0 & 0x000f0000);
3087 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3088 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3089 ry = (insn0 & 0x0000f000) << 4;
3090 else if ((insn0 & 0xff00f000) == 0xe300c000)
3091 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3092 ry = (insn0 & 0x000f0000);
3093 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3094 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3095 ry = (insn0 & 0x0000f000) << 4;
3096 else
3097 invalid_tls_insn (input_bfd, input_section, rel);
3098 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3099 insn1 = 0x000d;
3100 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3101 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3102 }
3103 }
3104 else if (r_type == R_390_TLS_GDCALL)
3105 {
3106 unsigned int insn0, insn1;
3107
3108 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3109 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3110 if ((insn0 & 0xffff0000) != 0xc0e50000)
3111 invalid_tls_insn (input_bfd, input_section, rel);
3112 if (!info->shared && (h == NULL || h->dynindx == -1))
3113 {
3114 /* GD->LE transition.
3115 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3116 insn0 = 0xc0040000;
3117 insn1 = 0x0000;
3118 }
3119 else
3120 {
3121 /* GD->IE transition.
3122 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3123 insn0 = 0xe322c000;
3124 insn1 = 0x0004;
3125 }
3126 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3127 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3128 }
3129 else if (r_type == R_390_TLS_LDCALL)
3130 {
3131 if (!info->shared)
3132 {
3133 unsigned int insn0, insn1;
3134
3135 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3136 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3137 if ((insn0 & 0xffff0000) != 0xc0e50000)
3138 invalid_tls_insn (input_bfd, input_section, rel);
3139 /* LD->LE transition.
3140 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3141 insn0 = 0xc0040000;
3142 insn1 = 0x0000;
3143 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3144 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3145 }
3146 }
3147 continue;
3148
3149 default:
3150 break;
3151 }
3152
3153 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3154 because such sections are not SEC_ALLOC and thus ld.so will
3155 not process them. */
3156 if (unresolved_reloc
3157 && !((input_section->flags & SEC_DEBUGGING) != 0
3158 && h->def_dynamic)
3159 && _bfd_elf_section_offset (output_bfd, info, input_section,
3160 rel->r_offset) != (bfd_vma) -1)
3161 (*_bfd_error_handler)
3162 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3163 input_bfd,
3164 input_section,
3165 (long) rel->r_offset,
3166 howto->name,
3167 h->root.root.string);
3168
3169 do_relocation:
3170
3171 if (r_type == R_390_20
3172 || r_type == R_390_GOT20
3173 || r_type == R_390_GOTPLT20
3174 || r_type == R_390_TLS_GOTIE20)
3175 {
3176 relocation += rel->r_addend;
3177 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3178 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3179 contents, rel->r_offset,
3180 relocation, 0);
3181 }
3182 else
3183 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3184 contents, rel->r_offset,
3185 relocation, rel->r_addend);
3186
3187 if (r != bfd_reloc_ok)
3188 {
3189 const char *name;
3190
3191 if (h != NULL)
3192 name = h->root.root.string;
3193 else
3194 {
3195 name = bfd_elf_string_from_elf_section (input_bfd,
3196 symtab_hdr->sh_link,
3197 sym->st_name);
3198 if (name == NULL)
3199 return FALSE;
3200 if (*name == '\0')
3201 name = bfd_section_name (input_bfd, sec);
3202 }
3203
3204 if (r == bfd_reloc_overflow)
3205 {
3206
3207 if (! ((*info->callbacks->reloc_overflow)
3208 (info, (h ? &h->root : NULL), name, howto->name,
3209 (bfd_vma) 0, input_bfd, input_section,
3210 rel->r_offset)))
3211 return FALSE;
3212 }
3213 else
3214 {
3215 (*_bfd_error_handler)
3216 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3217 input_bfd, input_section,
3218 (long) rel->r_offset, name, (int) r);
3219 return FALSE;
3220 }
3221 }
3222 }
3223
3224 return TRUE;
3225 }
3226
3227 /* Generate the PLT slots together with the dynamic relocations needed
3228 for IFUNC symbols. */
3229
3230 static void
3231 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3232 struct bfd_link_info *info,
3233 struct elf_link_hash_entry *h,
3234 struct elf_s390_link_hash_table *htab,
3235 bfd_vma plt_offset,
3236 bfd_vma resolver_address)
3237 {
3238 bfd_vma plt_index;
3239 bfd_vma got_offset;
3240 Elf_Internal_Rela rela;
3241 bfd_byte *loc;
3242 asection *plt, *gotplt, *relplt;
3243
3244 if (htab->elf.iplt == NULL
3245 || htab->elf.igotplt == NULL
3246 || htab->elf.irelplt == NULL)
3247 abort ();
3248
3249 /* Index of the PLT slot within iplt section. */
3250 plt_index = plt_offset / PLT_ENTRY_SIZE;
3251 plt = htab->elf.iplt;
3252 /* Offset into the igot.plt section. */
3253 got_offset = plt_index * GOT_ENTRY_SIZE;
3254 gotplt = htab->elf.igotplt;
3255 relplt = htab->elf.irelplt;
3256
3257 /* Fill in the blueprint of a PLT. */
3258 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3259 PLT_ENTRY_SIZE);
3260
3261 /* Fixup the relative address to the GOT entry */
3262 bfd_put_32 (output_bfd,
3263 (gotplt->output_section->vma +
3264 gotplt->output_offset + got_offset
3265 - (plt->output_section->vma +
3266 plt->output_offset +
3267 plt_offset))/2,
3268 plt->contents + plt_offset + 2);
3269 /* Fixup the relative branch to PLT 0 */
3270 bfd_put_32 (output_bfd, - (plt->output_offset +
3271 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3272 plt->contents + plt_offset + 24);
3273 /* Fixup offset into .rela.plt section. */
3274 bfd_put_32 (output_bfd, relplt->output_offset +
3275 plt_index * sizeof (Elf64_External_Rela),
3276 plt->contents + plt_offset + 28);
3277
3278 /* Fill in the entry in the global offset table.
3279 Points to instruction after GOT offset. */
3280 bfd_put_64 (output_bfd,
3281 (plt->output_section->vma
3282 + plt->output_offset
3283 + plt_offset
3284 + 14),
3285 gotplt->contents + got_offset);
3286
3287 /* Fill in the entry in the .rela.plt section. */
3288 rela.r_offset = (gotplt->output_section->vma
3289 + gotplt->output_offset
3290 + got_offset);
3291
3292 if (!h
3293 || h->dynindx == -1
3294 || ((info->executable
3295 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3296 && h->def_regular))
3297 {
3298 /* The symbol can be locally resolved. */
3299 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3300 rela.r_addend = resolver_address;
3301 }
3302 else
3303 {
3304 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3305 rela.r_addend = 0;
3306 }
3307
3308 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3309 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3310 }
3311
3312
3313 /* Finish up dynamic symbol handling. We set the contents of various
3314 dynamic sections here. */
3315
3316 static bfd_boolean
3317 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3318 struct bfd_link_info *info,
3319 struct elf_link_hash_entry *h,
3320 Elf_Internal_Sym *sym)
3321 {
3322 struct elf_s390_link_hash_table *htab;
3323 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3324
3325 htab = elf_s390_hash_table (info);
3326 if (htab == NULL)
3327 return FALSE;
3328
3329 if (h->plt.offset != (bfd_vma) -1)
3330 {
3331 bfd_vma plt_index;
3332 bfd_vma got_offset;
3333 Elf_Internal_Rela rela;
3334 bfd_byte *loc;
3335
3336 /* This symbol has an entry in the procedure linkage table. Set
3337 it up. */
3338 if (s390_is_ifunc_symbol_p (h))
3339 {
3340 /* If we can resolve the IFUNC symbol locally we generate an
3341 IRELATIVE reloc. */
3342 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3343 eh->ifunc_resolver_address +
3344 eh->ifunc_resolver_section->output_offset +
3345 eh->ifunc_resolver_section->output_section->vma);
3346 ;
3347 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3348 symbols is below. */
3349 }
3350 else
3351 {
3352 if (h->dynindx == -1
3353 || htab->elf.splt == NULL
3354 || htab->elf.sgotplt == NULL
3355 || htab->elf.srelplt == NULL)
3356 abort ();
3357
3358 /* Calc. index no.
3359 Current offset - size first entry / entry size. */
3360 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3361
3362 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3363 addr & GOT addr. */
3364 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3365
3366 /* Fill in the blueprint of a PLT. */
3367 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3368 PLT_ENTRY_SIZE);
3369
3370 /* Fixup the relative address to the GOT entry */
3371 bfd_put_32 (output_bfd,
3372 (htab->elf.sgotplt->output_section->vma +
3373 htab->elf.sgotplt->output_offset + got_offset
3374 - (htab->elf.splt->output_section->vma +
3375 htab->elf.splt->output_offset +
3376 h->plt.offset))/2,
3377 htab->elf.splt->contents + h->plt.offset + 2);
3378 /* Fixup the relative branch to PLT 0 */
3379 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3380 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3381 htab->elf.splt->contents + h->plt.offset + 24);
3382 /* Fixup offset into .rela.plt section. */
3383 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3384 htab->elf.splt->contents + h->plt.offset + 28);
3385
3386 /* Fill in the entry in the global offset table.
3387 Points to instruction after GOT offset. */
3388 bfd_put_64 (output_bfd,
3389 (htab->elf.splt->output_section->vma
3390 + htab->elf.splt->output_offset
3391 + h->plt.offset
3392 + 14),
3393 htab->elf.sgotplt->contents + got_offset);
3394
3395 /* Fill in the entry in the .rela.plt section. */
3396 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3397 + htab->elf.sgotplt->output_offset
3398 + got_offset);
3399 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3400 rela.r_addend = 0;
3401 loc = htab->elf.srelplt->contents + plt_index *
3402 sizeof (Elf64_External_Rela);
3403 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3404
3405 if (!h->def_regular)
3406 {
3407 /* Mark the symbol as undefined, rather than as defined in
3408 the .plt section. Leave the value alone. This is a clue
3409 for the dynamic linker, to make function pointer
3410 comparisons work between an application and shared
3411 library. */
3412 sym->st_shndx = SHN_UNDEF;
3413 }
3414 }
3415 }
3416
3417 if (h->got.offset != (bfd_vma) -1
3418 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3419 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3420 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3421 {
3422 Elf_Internal_Rela rela;
3423 bfd_byte *loc;
3424
3425 /* This symbol has an entry in the global offset table. Set it
3426 up. */
3427 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3428 abort ();
3429
3430 rela.r_offset = (htab->elf.sgot->output_section->vma
3431 + htab->elf.sgot->output_offset
3432 + (h->got.offset &~ (bfd_vma) 1));
3433
3434 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3435 {
3436 if (info->shared)
3437 {
3438 /* An explicit GOT slot usage needs GLOB_DAT. If the
3439 symbol references local the implicit got.iplt slot
3440 will be used and the IRELATIVE reloc has been created
3441 above. */
3442 goto do_glob_dat;
3443 }
3444 else
3445 {
3446 /* For non-shared objects explicit GOT slots must be
3447 filled with the PLT slot address for pointer
3448 equality reasons. */
3449 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3450 + htab->elf.iplt->output_offset
3451 + h->plt.offset),
3452 htab->elf.sgot->contents + h->got.offset);
3453 return TRUE;
3454 }
3455 }
3456 else if (info->shared
3457 && SYMBOL_REFERENCES_LOCAL (info, h))
3458 {
3459 /* If this is a static link, or it is a -Bsymbolic link and
3460 the symbol is defined locally or was forced to be local
3461 because of a version file, we just want to emit a
3462 RELATIVE reloc. The entry in the global offset table
3463 will already have been initialized in the
3464 relocate_section function. */
3465 if (!h->def_regular)
3466 return FALSE;
3467 BFD_ASSERT((h->got.offset & 1) != 0);
3468 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3469 rela.r_addend = (h->root.u.def.value
3470 + h->root.u.def.section->output_section->vma
3471 + h->root.u.def.section->output_offset);
3472 }
3473 else
3474 {
3475 BFD_ASSERT((h->got.offset & 1) == 0);
3476 do_glob_dat:
3477 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3478 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3479 rela.r_addend = 0;
3480 }
3481
3482 loc = htab->elf.srelgot->contents;
3483 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3484 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3485 }
3486
3487 if (h->needs_copy)
3488 {
3489 Elf_Internal_Rela rela;
3490 bfd_byte *loc;
3491
3492 /* This symbols needs a copy reloc. Set it up. */
3493
3494 if (h->dynindx == -1
3495 || (h->root.type != bfd_link_hash_defined
3496 && h->root.type != bfd_link_hash_defweak)
3497 || htab->srelbss == NULL)
3498 abort ();
3499
3500 rela.r_offset = (h->root.u.def.value
3501 + h->root.u.def.section->output_section->vma
3502 + h->root.u.def.section->output_offset);
3503 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3504 rela.r_addend = 0;
3505 loc = htab->srelbss->contents;
3506 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3507 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3508 }
3509
3510 /* Mark some specially defined symbols as absolute. */
3511 if (h == htab->elf.hdynamic
3512 || h == htab->elf.hgot
3513 || h == htab->elf.hplt)
3514 sym->st_shndx = SHN_ABS;
3515
3516 return TRUE;
3517 }
3518
3519 /* Used to decide how to sort relocs in an optimal manner for the
3520 dynamic linker, before writing them out. */
3521
3522 static enum elf_reloc_type_class
3523 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3524 const asection *rel_sec ATTRIBUTE_UNUSED,
3525 const Elf_Internal_Rela *rela)
3526 {
3527 switch ((int) ELF64_R_TYPE (rela->r_info))
3528 {
3529 case R_390_RELATIVE:
3530 return reloc_class_relative;
3531 case R_390_JMP_SLOT:
3532 return reloc_class_plt;
3533 case R_390_COPY:
3534 return reloc_class_copy;
3535 default:
3536 return reloc_class_normal;
3537 }
3538 }
3539
3540 /* Finish up the dynamic sections. */
3541
3542 static bfd_boolean
3543 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3544 struct bfd_link_info *info)
3545 {
3546 struct elf_s390_link_hash_table *htab;
3547 bfd *dynobj;
3548 asection *sdyn;
3549 bfd *ibfd;
3550 unsigned int i;
3551
3552 htab = elf_s390_hash_table (info);
3553 if (htab == NULL)
3554 return FALSE;
3555
3556 dynobj = htab->elf.dynobj;
3557 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3558
3559 if (htab->elf.dynamic_sections_created)
3560 {
3561 Elf64_External_Dyn *dyncon, *dynconend;
3562
3563 if (sdyn == NULL || htab->elf.sgot == NULL)
3564 abort ();
3565
3566 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3567 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3568 for (; dyncon < dynconend; dyncon++)
3569 {
3570 Elf_Internal_Dyn dyn;
3571 asection *s;
3572
3573 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3574
3575 switch (dyn.d_tag)
3576 {
3577 default:
3578 continue;
3579
3580 case DT_PLTGOT:
3581 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3582 break;
3583
3584 case DT_JMPREL:
3585 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3586 break;
3587
3588 case DT_PLTRELSZ:
3589 s = htab->elf.srelplt->output_section;
3590 dyn.d_un.d_val = s->size;
3591 break;
3592
3593 case DT_RELASZ:
3594 /* The procedure linkage table relocs (DT_JMPREL) should
3595 not be included in the overall relocs (DT_RELA).
3596 Therefore, we override the DT_RELASZ entry here to
3597 make it not include the JMPREL relocs. Since the
3598 linker script arranges for .rela.plt to follow all
3599 other relocation sections, we don't have to worry
3600 about changing the DT_RELA entry. */
3601 s = htab->elf.srelplt->output_section;
3602 dyn.d_un.d_val -= s->size;
3603 break;
3604 }
3605
3606 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3607 }
3608
3609 /* Fill in the special first entry in the procedure linkage table. */
3610 if (htab->elf.splt && htab->elf.splt->size > 0)
3611 {
3612 /* fill in blueprint for plt 0 entry */
3613 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3614 PLT_FIRST_ENTRY_SIZE);
3615 /* Fixup relative address to start of GOT */
3616 bfd_put_32 (output_bfd,
3617 (htab->elf.sgotplt->output_section->vma +
3618 htab->elf.sgotplt->output_offset
3619 - htab->elf.splt->output_section->vma - 6)/2,
3620 htab->elf.splt->contents + 8);
3621 }
3622 elf_section_data (htab->elf.splt->output_section)
3623 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3624 }
3625
3626 if (htab->elf.sgotplt)
3627 {
3628 /* Fill in the first three entries in the global offset table. */
3629 if (htab->elf.sgotplt->size > 0)
3630 {
3631 bfd_put_64 (output_bfd,
3632 (sdyn == NULL ? (bfd_vma) 0
3633 : sdyn->output_section->vma + sdyn->output_offset),
3634 htab->elf.sgotplt->contents);
3635 /* One entry for shared object struct ptr. */
3636 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3637 /* One entry for _dl_runtime_resolve. */
3638 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3639 }
3640
3641 elf_section_data (htab->elf.sgot->output_section)
3642 ->this_hdr.sh_entsize = 8;
3643 }
3644
3645 /* Finish dynamic symbol for local IFUNC symbols. */
3646 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3647 {
3648 struct plt_entry *local_plt;
3649 Elf_Internal_Sym *isym;
3650 Elf_Internal_Shdr *symtab_hdr;
3651
3652 symtab_hdr = &elf_symtab_hdr (ibfd);
3653
3654 local_plt = elf_s390_local_plt (ibfd);
3655 if (local_plt != NULL)
3656 for (i = 0; i < symtab_hdr->sh_info; i++)
3657 {
3658 if (local_plt[i].plt.offset != (bfd_vma) -1)
3659 {
3660 asection *sec = local_plt[i].sec;
3661 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3662 if (isym == NULL)
3663 return FALSE;
3664
3665 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3666 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3667 local_plt[i].plt.offset,
3668 isym->st_value
3669 + sec->output_section->vma
3670 + sec->output_offset);
3671
3672 }
3673 }
3674 }
3675
3676 return TRUE;
3677 }
3678
3679 /* Return address for Ith PLT stub in section PLT, for relocation REL
3680 or (bfd_vma) -1 if it should not be included. */
3681
3682 static bfd_vma
3683 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3684 const arelent *rel ATTRIBUTE_UNUSED)
3685 {
3686 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3687 }
3688
3689 /* Why was the hash table entry size definition changed from
3690 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3691 this is the only reason for the s390_elf64_size_info structure. */
3692
3693 const struct elf_size_info s390_elf64_size_info =
3694 {
3695 sizeof (Elf64_External_Ehdr),
3696 sizeof (Elf64_External_Phdr),
3697 sizeof (Elf64_External_Shdr),
3698 sizeof (Elf64_External_Rel),
3699 sizeof (Elf64_External_Rela),
3700 sizeof (Elf64_External_Sym),
3701 sizeof (Elf64_External_Dyn),
3702 sizeof (Elf_External_Note),
3703 8, /* hash-table entry size. */
3704 1, /* internal relocations per external relocations. */
3705 64, /* arch_size. */
3706 3, /* log_file_align. */
3707 ELFCLASS64, EV_CURRENT,
3708 bfd_elf64_write_out_phdrs,
3709 bfd_elf64_write_shdrs_and_ehdr,
3710 bfd_elf64_checksum_contents,
3711 bfd_elf64_write_relocs,
3712 bfd_elf64_swap_symbol_in,
3713 bfd_elf64_swap_symbol_out,
3714 bfd_elf64_slurp_reloc_table,
3715 bfd_elf64_slurp_symbol_table,
3716 bfd_elf64_swap_dyn_in,
3717 bfd_elf64_swap_dyn_out,
3718 bfd_elf64_swap_reloc_in,
3719 bfd_elf64_swap_reloc_out,
3720 bfd_elf64_swap_reloca_in,
3721 bfd_elf64_swap_reloca_out
3722 };
3723
3724 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3725 #define TARGET_BIG_NAME "elf64-s390"
3726 #define ELF_ARCH bfd_arch_s390
3727 #define ELF_TARGET_ID S390_ELF_DATA
3728 #define ELF_MACHINE_CODE EM_S390
3729 #define ELF_MACHINE_ALT1 EM_S390_OLD
3730 #define ELF_MAXPAGESIZE 0x1000
3731
3732 #define elf_backend_size_info s390_elf64_size_info
3733
3734 #define elf_backend_can_gc_sections 1
3735 #define elf_backend_can_refcount 1
3736 #define elf_backend_want_got_plt 1
3737 #define elf_backend_plt_readonly 1
3738 #define elf_backend_want_plt_sym 0
3739 #define elf_backend_got_header_size 24
3740 #define elf_backend_rela_normal 1
3741
3742 #define elf_info_to_howto elf_s390_info_to_howto
3743
3744 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3745 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3746 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3747 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3748
3749 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3750 #define elf_backend_check_relocs elf_s390_check_relocs
3751 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3752 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3753 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3754 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3755 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3756 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3757 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3758 #define elf_backend_relocate_section elf_s390_relocate_section
3759 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3760 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3761 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3762 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3763
3764 #define bfd_elf64_mkobject elf_s390_mkobject
3765 #define elf_backend_object_p elf_s390_object_p
3766
3767 /* Enable ELF64 archive functions. */
3768 #define bfd_elf64_archive_functions
3769 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3770 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3771
3772 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3773 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3774 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3775 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3776 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3777 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3778 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3779 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3780 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3781
3782 #include "elf64-target.h"
GDB Binutils - Deliverables
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