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2012-07-13 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
[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_malloc (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 ret->elf.sgot = NULL;
715 ret->elf.sgotplt = NULL;
716 ret->elf.srelgot = NULL;
717 ret->elf.splt = NULL;
718 ret->elf.srelplt = NULL;
719 ret->sdynbss = NULL;
720 ret->srelbss = NULL;
721 ret->tls_ldm_got.refcount = 0;
722 ret->sym_cache.abfd = NULL;
723
724 return &ret->elf.root;
725 }
726
727 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
728 shortcuts to them in our hash table. */
729
730 static bfd_boolean
731 create_got_section (bfd *dynobj,
732 struct bfd_link_info *info)
733 {
734 struct elf_s390_link_hash_table *htab;
735
736 if (! _bfd_elf_create_got_section (dynobj, info))
737 return FALSE;
738
739 htab = elf_s390_hash_table (info);
740 if (htab == NULL)
741 return FALSE;
742
743 htab->elf.sgot = bfd_get_linker_section (dynobj, ".got");
744 htab->elf.sgotplt = bfd_get_linker_section (dynobj, ".got.plt");
745 htab->elf.srelgot = bfd_get_linker_section (dynobj, ".rela.got");
746 if (!htab->elf.sgot || !htab->elf.sgotplt || !htab->elf.srelgot)
747 abort ();
748 return TRUE;
749 }
750
751 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
752 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
753 hash table. */
754
755 static bfd_boolean
756 elf_s390_create_dynamic_sections (bfd *dynobj,
757 struct bfd_link_info *info)
758 {
759 struct elf_s390_link_hash_table *htab;
760
761 htab = elf_s390_hash_table (info);
762 if (htab == NULL)
763 return FALSE;
764
765 if (!htab->elf.sgot && !create_got_section (dynobj, info))
766 return FALSE;
767
768 if (!_bfd_elf_create_dynamic_sections (dynobj, info))
769 return FALSE;
770
771 htab->elf.splt = bfd_get_linker_section (dynobj, ".plt");
772 htab->elf.srelplt = bfd_get_linker_section (dynobj, ".rela.plt");
773 htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss");
774 if (!info->shared)
775 htab->srelbss = bfd_get_linker_section (dynobj, ".rela.bss");
776
777 if (!htab->elf.splt || !htab->elf.srelplt || !htab->sdynbss
778 || (!info->shared && !htab->srelbss))
779 abort ();
780
781 return TRUE;
782 }
783
784 /* Copy the extra info we tack onto an elf_link_hash_entry. */
785
786 static void
787 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
788 struct elf_link_hash_entry *dir,
789 struct elf_link_hash_entry *ind)
790 {
791 struct elf_s390_link_hash_entry *edir, *eind;
792
793 edir = (struct elf_s390_link_hash_entry *) dir;
794 eind = (struct elf_s390_link_hash_entry *) ind;
795
796 if (eind->dyn_relocs != NULL)
797 {
798 if (edir->dyn_relocs != NULL)
799 {
800 struct elf_dyn_relocs **pp;
801 struct elf_dyn_relocs *p;
802
803 /* Add reloc counts against the indirect sym to the direct sym
804 list. Merge any entries against the same section. */
805 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
806 {
807 struct elf_dyn_relocs *q;
808
809 for (q = edir->dyn_relocs; q != NULL; q = q->next)
810 if (q->sec == p->sec)
811 {
812 q->pc_count += p->pc_count;
813 q->count += p->count;
814 *pp = p->next;
815 break;
816 }
817 if (q == NULL)
818 pp = &p->next;
819 }
820 *pp = edir->dyn_relocs;
821 }
822
823 edir->dyn_relocs = eind->dyn_relocs;
824 eind->dyn_relocs = NULL;
825 }
826
827 if (ind->root.type == bfd_link_hash_indirect
828 && dir->got.refcount <= 0)
829 {
830 edir->tls_type = eind->tls_type;
831 eind->tls_type = GOT_UNKNOWN;
832 }
833
834 if (ELIMINATE_COPY_RELOCS
835 && ind->root.type != bfd_link_hash_indirect
836 && dir->dynamic_adjusted)
837 {
838 /* If called to transfer flags for a weakdef during processing
839 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
840 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
841 dir->ref_dynamic |= ind->ref_dynamic;
842 dir->ref_regular |= ind->ref_regular;
843 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
844 dir->needs_plt |= ind->needs_plt;
845 }
846 else
847 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
848 }
849
850 static int
851 elf_s390_tls_transition (struct bfd_link_info *info,
852 int r_type,
853 int is_local)
854 {
855 if (info->shared)
856 return r_type;
857
858 switch (r_type)
859 {
860 case R_390_TLS_GD64:
861 case R_390_TLS_IE64:
862 if (is_local)
863 return R_390_TLS_LE64;
864 return R_390_TLS_IE64;
865 case R_390_TLS_GOTIE64:
866 if (is_local)
867 return R_390_TLS_LE64;
868 return R_390_TLS_GOTIE64;
869 case R_390_TLS_LDM64:
870 return R_390_TLS_LE64;
871 }
872
873 return r_type;
874 }
875
876 /* Look through the relocs for a section during the first phase, and
877 allocate space in the global offset table or procedure linkage
878 table. */
879
880 static bfd_boolean
881 elf_s390_check_relocs (bfd *abfd,
882 struct bfd_link_info *info,
883 asection *sec,
884 const Elf_Internal_Rela *relocs)
885 {
886 struct elf_s390_link_hash_table *htab;
887 Elf_Internal_Shdr *symtab_hdr;
888 struct elf_link_hash_entry **sym_hashes;
889 const Elf_Internal_Rela *rel;
890 const Elf_Internal_Rela *rel_end;
891 asection *sreloc;
892 bfd_signed_vma *local_got_refcounts;
893 int tls_type, old_tls_type;
894
895 if (info->relocatable)
896 return TRUE;
897
898 BFD_ASSERT (is_s390_elf (abfd));
899
900 htab = elf_s390_hash_table (info);
901 if (htab == NULL)
902 return FALSE;
903
904 symtab_hdr = &elf_symtab_hdr (abfd);
905 sym_hashes = elf_sym_hashes (abfd);
906 local_got_refcounts = elf_local_got_refcounts (abfd);
907
908 sreloc = NULL;
909
910 rel_end = relocs + sec->reloc_count;
911 for (rel = relocs; rel < rel_end; rel++)
912 {
913 unsigned int r_type;
914 unsigned long r_symndx;
915 struct elf_link_hash_entry *h;
916 Elf_Internal_Sym *isym;
917
918 r_symndx = ELF64_R_SYM (rel->r_info);
919
920 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
921 {
922 (*_bfd_error_handler) (_("%B: bad symbol index: %d"),
923 abfd,
924 r_symndx);
925 return FALSE;
926 }
927
928 if (r_symndx < symtab_hdr->sh_info)
929 {
930 /* A local symbol. */
931 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
932 abfd, r_symndx);
933 if (isym == NULL)
934 return FALSE;
935
936 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
937 {
938 struct plt_entry *plt;
939
940 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
941 return FALSE;
942
943 if (local_got_refcounts == NULL)
944 {
945 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
946 return FALSE;
947 local_got_refcounts = elf_local_got_refcounts (abfd);
948 }
949 plt = elf_s390_local_plt (abfd);
950 plt[r_symndx].plt.refcount++;
951 }
952 h = NULL;
953 }
954 else
955 {
956 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
957 while (h->root.type == bfd_link_hash_indirect
958 || h->root.type == bfd_link_hash_warning)
959 h = (struct elf_link_hash_entry *) h->root.u.i.link;
960 }
961
962 /* Create got section and local_got_refcounts array if they
963 are needed. */
964 r_type = elf_s390_tls_transition (info,
965 ELF64_R_TYPE (rel->r_info),
966 h == NULL);
967 switch (r_type)
968 {
969 case R_390_GOT12:
970 case R_390_GOT16:
971 case R_390_GOT20:
972 case R_390_GOT32:
973 case R_390_GOT64:
974 case R_390_GOTENT:
975 case R_390_GOTPLT12:
976 case R_390_GOTPLT16:
977 case R_390_GOTPLT20:
978 case R_390_GOTPLT32:
979 case R_390_GOTPLT64:
980 case R_390_GOTPLTENT:
981 case R_390_TLS_GD64:
982 case R_390_TLS_GOTIE12:
983 case R_390_TLS_GOTIE20:
984 case R_390_TLS_GOTIE64:
985 case R_390_TLS_IEENT:
986 case R_390_TLS_IE64:
987 case R_390_TLS_LDM64:
988 if (h == NULL
989 && local_got_refcounts == NULL)
990 {
991 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
992 return FALSE;
993 local_got_refcounts = elf_local_got_refcounts (abfd);
994 }
995
996 /* Fall through. */
997 case R_390_GOTOFF16:
998 case R_390_GOTOFF32:
999 case R_390_GOTOFF64:
1000 case R_390_GOTPC:
1001 case R_390_GOTPCDBL:
1002 if (htab->elf.sgot == NULL)
1003 {
1004 if (htab->elf.dynobj == NULL)
1005 htab->elf.dynobj = abfd;
1006 if (!create_got_section (htab->elf.dynobj, info))
1007 return FALSE;
1008 }
1009 }
1010
1011 if (h != NULL)
1012 {
1013 if (htab->elf.dynobj == NULL)
1014 htab->elf.dynobj = abfd;
1015 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
1016 return FALSE;
1017
1018 /* Make sure an IFUNC symbol defined in a non-shared object
1019 always gets a PLT slot. */
1020 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1021 {
1022 /* The symbol is called by the dynamic loader in order
1023 to resolve the relocation. So it is in fact also
1024 referenced. */
1025 h->ref_regular = 1;
1026 h->needs_plt = 1;
1027 }
1028 }
1029
1030 switch (r_type)
1031 {
1032 case R_390_GOTOFF16:
1033 case R_390_GOTOFF32:
1034 case R_390_GOTOFF64:
1035 case R_390_GOTPC:
1036 case R_390_GOTPCDBL:
1037 /* These relocs do not need a GOT slot. They just load the
1038 GOT pointer itself or address something else relative to
1039 the GOT. Since the GOT pointer has been set up above we
1040 are done. */
1041 break;
1042
1043 case R_390_PLT16DBL:
1044 case R_390_PLT32:
1045 case R_390_PLT32DBL:
1046 case R_390_PLT64:
1047 case R_390_PLTOFF16:
1048 case R_390_PLTOFF32:
1049 case R_390_PLTOFF64:
1050 /* This symbol requires a procedure linkage table entry. We
1051 actually build the entry in adjust_dynamic_symbol,
1052 because this might be a case of linking PIC code which is
1053 never referenced by a dynamic object, in which case we
1054 don't need to generate a procedure linkage table entry
1055 after all. */
1056
1057 /* If this is a local symbol, we resolve it directly without
1058 creating a procedure linkage table entry. */
1059 if (h != NULL)
1060 {
1061 h->needs_plt = 1;
1062 h->plt.refcount += 1;
1063 }
1064 break;
1065
1066 case R_390_GOTPLT12:
1067 case R_390_GOTPLT16:
1068 case R_390_GOTPLT20:
1069 case R_390_GOTPLT32:
1070 case R_390_GOTPLT64:
1071 case R_390_GOTPLTENT:
1072 /* This symbol requires either a procedure linkage table entry
1073 or an entry in the local got. We actually build the entry
1074 in adjust_dynamic_symbol because whether this is really a
1075 global reference can change and with it the fact if we have
1076 to create a plt entry or a local got entry. To be able to
1077 make a once global symbol a local one we have to keep track
1078 of the number of gotplt references that exist for this
1079 symbol. */
1080 if (h != NULL)
1081 {
1082 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1083 h->needs_plt = 1;
1084 h->plt.refcount += 1;
1085 }
1086 else
1087 local_got_refcounts[r_symndx] += 1;
1088 break;
1089
1090 case R_390_TLS_LDM64:
1091 htab->tls_ldm_got.refcount += 1;
1092 break;
1093
1094 case R_390_TLS_IE64:
1095 case R_390_TLS_GOTIE12:
1096 case R_390_TLS_GOTIE20:
1097 case R_390_TLS_GOTIE64:
1098 case R_390_TLS_IEENT:
1099 if (info->shared)
1100 info->flags |= DF_STATIC_TLS;
1101 /* Fall through */
1102
1103 case R_390_GOT12:
1104 case R_390_GOT16:
1105 case R_390_GOT20:
1106 case R_390_GOT32:
1107 case R_390_GOT64:
1108 case R_390_GOTENT:
1109 case R_390_TLS_GD64:
1110 /* This symbol requires a global offset table entry. */
1111 switch (r_type)
1112 {
1113 default:
1114 case R_390_GOT12:
1115 case R_390_GOT16:
1116 case R_390_GOT20:
1117 case R_390_GOT32:
1118 case R_390_GOTENT:
1119 tls_type = GOT_NORMAL;
1120 break;
1121 case R_390_TLS_GD64:
1122 tls_type = GOT_TLS_GD;
1123 break;
1124 case R_390_TLS_IE64:
1125 case R_390_TLS_GOTIE64:
1126 tls_type = GOT_TLS_IE;
1127 break;
1128 case R_390_TLS_GOTIE12:
1129 case R_390_TLS_GOTIE20:
1130 case R_390_TLS_IEENT:
1131 tls_type = GOT_TLS_IE_NLT;
1132 break;
1133 }
1134
1135 if (h != NULL)
1136 {
1137 h->got.refcount += 1;
1138 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1139 }
1140 else
1141 {
1142 local_got_refcounts[r_symndx] += 1;
1143 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1144 }
1145 /* If a TLS symbol is accessed using IE at least once,
1146 there is no point to use dynamic model for it. */
1147 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1148 {
1149 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1150 {
1151 (*_bfd_error_handler)
1152 (_("%B: `%s' accessed both as normal and thread local symbol"),
1153 abfd, h->root.root.string);
1154 return FALSE;
1155 }
1156 if (old_tls_type > tls_type)
1157 tls_type = old_tls_type;
1158 }
1159
1160 if (old_tls_type != tls_type)
1161 {
1162 if (h != NULL)
1163 elf_s390_hash_entry (h)->tls_type = tls_type;
1164 else
1165 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1166 }
1167
1168 if (r_type != R_390_TLS_IE64)
1169 break;
1170 /* Fall through */
1171
1172 case R_390_TLS_LE64:
1173 if (!info->shared)
1174 break;
1175 info->flags |= DF_STATIC_TLS;
1176 /* Fall through */
1177
1178 case R_390_8:
1179 case R_390_16:
1180 case R_390_32:
1181 case R_390_64:
1182 case R_390_PC16:
1183 case R_390_PC16DBL:
1184 case R_390_PC32:
1185 case R_390_PC32DBL:
1186 case R_390_PC64:
1187 if (h != NULL)
1188 {
1189 /* If this reloc is in a read-only section, we might
1190 need a copy reloc. We can't check reliably at this
1191 stage whether the section is read-only, as input
1192 sections have not yet been mapped to output sections.
1193 Tentatively set the flag for now, and correct in
1194 adjust_dynamic_symbol. */
1195 h->non_got_ref = 1;
1196
1197 if (!info->shared)
1198 {
1199 /* We may need a .plt entry if the function this reloc
1200 refers to is in a shared lib. */
1201 h->plt.refcount += 1;
1202 }
1203 }
1204
1205 /* If we are creating a shared library, and this is a reloc
1206 against a global symbol, or a non PC relative reloc
1207 against a local symbol, then we need to copy the reloc
1208 into the shared library. However, if we are linking with
1209 -Bsymbolic, we do not need to copy a reloc against a
1210 global symbol which is defined in an object we are
1211 including in the link (i.e., DEF_REGULAR is set). At
1212 this point we have not seen all the input files, so it is
1213 possible that DEF_REGULAR is not set now but will be set
1214 later (it is never cleared). In case of a weak definition,
1215 DEF_REGULAR may be cleared later by a strong definition in
1216 a shared library. We account for that possibility below by
1217 storing information in the relocs_copied field of the hash
1218 table entry. A similar situation occurs when creating
1219 shared libraries and symbol visibility changes render the
1220 symbol local.
1221
1222 If on the other hand, we are creating an executable, we
1223 may need to keep relocations for symbols satisfied by a
1224 dynamic library if we manage to avoid copy relocs for the
1225 symbol. */
1226 if ((info->shared
1227 && (sec->flags & SEC_ALLOC) != 0
1228 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1229 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1230 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1231 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1232 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1233 || (h != NULL
1234 && (! SYMBOLIC_BIND (info, h)
1235 || h->root.type == bfd_link_hash_defweak
1236 || !h->def_regular))))
1237 || (ELIMINATE_COPY_RELOCS
1238 && !info->shared
1239 && (sec->flags & SEC_ALLOC) != 0
1240 && h != NULL
1241 && (h->root.type == bfd_link_hash_defweak
1242 || !h->def_regular)))
1243 {
1244 struct elf_dyn_relocs *p;
1245 struct elf_dyn_relocs **head;
1246
1247 /* We must copy these reloc types into the output file.
1248 Create a reloc section in dynobj and make room for
1249 this reloc. */
1250 if (sreloc == NULL)
1251 {
1252 if (htab->elf.dynobj == NULL)
1253 htab->elf.dynobj = abfd;
1254
1255 sreloc = _bfd_elf_make_dynamic_reloc_section
1256 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1257
1258 if (sreloc == NULL)
1259 return FALSE;
1260 }
1261
1262 /* If this is a global symbol, we count the number of
1263 relocations we need for this symbol. */
1264 if (h != NULL)
1265 {
1266 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1267 }
1268 else
1269 {
1270 /* Track dynamic relocs needed for local syms too.
1271 We really need local syms available to do this
1272 easily. Oh well. */
1273 asection *s;
1274 void *vpp;
1275
1276 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1277 abfd, r_symndx);
1278 if (isym == NULL)
1279 return FALSE;
1280
1281 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1282 if (s == NULL)
1283 s = sec;
1284
1285 vpp = &elf_section_data (s)->local_dynrel;
1286 head = (struct elf_dyn_relocs **) vpp;
1287 }
1288
1289 p = *head;
1290 if (p == NULL || p->sec != sec)
1291 {
1292 bfd_size_type amt = sizeof *p;
1293 p = ((struct elf_dyn_relocs *)
1294 bfd_alloc (htab->elf.dynobj, amt));
1295 if (p == NULL)
1296 return FALSE;
1297 p->next = *head;
1298 *head = p;
1299 p->sec = sec;
1300 p->count = 0;
1301 p->pc_count = 0;
1302 }
1303
1304 p->count += 1;
1305 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1306 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1307 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1308 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1309 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1310 p->pc_count += 1;
1311 }
1312 break;
1313
1314 /* This relocation describes the C++ object vtable hierarchy.
1315 Reconstruct it for later use during GC. */
1316 case R_390_GNU_VTINHERIT:
1317 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1318 return FALSE;
1319 break;
1320
1321 /* This relocation describes which C++ vtable entries are actually
1322 used. Record for later use during GC. */
1323 case R_390_GNU_VTENTRY:
1324 BFD_ASSERT (h != NULL);
1325 if (h != NULL
1326 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1327 return FALSE;
1328 break;
1329
1330 default:
1331 break;
1332 }
1333 }
1334
1335 return TRUE;
1336 }
1337
1338 /* Return the section that should be marked against GC for a given
1339 relocation. */
1340
1341 static asection *
1342 elf_s390_gc_mark_hook (asection *sec,
1343 struct bfd_link_info *info,
1344 Elf_Internal_Rela *rel,
1345 struct elf_link_hash_entry *h,
1346 Elf_Internal_Sym *sym)
1347 {
1348 if (h != NULL)
1349 switch (ELF64_R_TYPE (rel->r_info))
1350 {
1351 case R_390_GNU_VTINHERIT:
1352 case R_390_GNU_VTENTRY:
1353 return NULL;
1354 }
1355
1356 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1357 }
1358
1359 /* Update the got entry reference counts for the section being removed. */
1360
1361 static bfd_boolean
1362 elf_s390_gc_sweep_hook (bfd *abfd,
1363 struct bfd_link_info *info,
1364 asection *sec,
1365 const Elf_Internal_Rela *relocs)
1366 {
1367 struct elf_s390_link_hash_table *htab;
1368 Elf_Internal_Shdr *symtab_hdr;
1369 struct elf_link_hash_entry **sym_hashes;
1370 bfd_signed_vma *local_got_refcounts;
1371 const Elf_Internal_Rela *rel, *relend;
1372
1373 if (info->relocatable)
1374 return TRUE;
1375
1376 htab = elf_s390_hash_table (info);
1377 if (htab == NULL)
1378 return FALSE;
1379
1380 elf_section_data (sec)->local_dynrel = NULL;
1381
1382 symtab_hdr = &elf_symtab_hdr (abfd);
1383 sym_hashes = elf_sym_hashes (abfd);
1384 local_got_refcounts = elf_local_got_refcounts (abfd);
1385
1386 relend = relocs + sec->reloc_count;
1387 for (rel = relocs; rel < relend; rel++)
1388 {
1389 unsigned long r_symndx;
1390 unsigned int r_type;
1391 struct elf_link_hash_entry *h = NULL;
1392
1393 r_symndx = ELF64_R_SYM (rel->r_info);
1394 if (r_symndx >= symtab_hdr->sh_info)
1395 {
1396 struct elf_s390_link_hash_entry *eh;
1397 struct elf_dyn_relocs **pp;
1398 struct elf_dyn_relocs *p;
1399
1400 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1401 while (h->root.type == bfd_link_hash_indirect
1402 || h->root.type == bfd_link_hash_warning)
1403 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1404 eh = (struct elf_s390_link_hash_entry *) h;
1405
1406 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1407 if (p->sec == sec)
1408 {
1409 /* Everything must go for SEC. */
1410 *pp = p->next;
1411 break;
1412 }
1413 }
1414 else
1415 {
1416 Elf_Internal_Sym *isym;
1417
1418 /* A local symbol. */
1419 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1420 abfd, r_symndx);
1421 if (isym == NULL)
1422 return FALSE;
1423
1424 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1425 {
1426 struct plt_entry *plt = elf_s390_local_plt (abfd);
1427 if (plt[r_symndx].plt.refcount > 0)
1428 plt[r_symndx].plt.refcount--;
1429 }
1430 }
1431
1432 r_type = ELF64_R_TYPE (rel->r_info);
1433 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1434 switch (r_type)
1435 {
1436 case R_390_TLS_LDM64:
1437 if (htab->tls_ldm_got.refcount > 0)
1438 htab->tls_ldm_got.refcount -= 1;
1439 break;
1440
1441 case R_390_TLS_GD64:
1442 case R_390_TLS_IE64:
1443 case R_390_TLS_GOTIE12:
1444 case R_390_TLS_GOTIE20:
1445 case R_390_TLS_GOTIE64:
1446 case R_390_TLS_IEENT:
1447 case R_390_GOT12:
1448 case R_390_GOT16:
1449 case R_390_GOT20:
1450 case R_390_GOT32:
1451 case R_390_GOT64:
1452 case R_390_GOTOFF16:
1453 case R_390_GOTOFF32:
1454 case R_390_GOTOFF64:
1455 case R_390_GOTPC:
1456 case R_390_GOTPCDBL:
1457 case R_390_GOTENT:
1458 if (h != NULL)
1459 {
1460 if (h->got.refcount > 0)
1461 h->got.refcount -= 1;
1462 }
1463 else if (local_got_refcounts != NULL)
1464 {
1465 if (local_got_refcounts[r_symndx] > 0)
1466 local_got_refcounts[r_symndx] -= 1;
1467 }
1468 break;
1469
1470 case R_390_8:
1471 case R_390_12:
1472 case R_390_16:
1473 case R_390_20:
1474 case R_390_32:
1475 case R_390_64:
1476 case R_390_PC16:
1477 case R_390_PC16DBL:
1478 case R_390_PC32:
1479 case R_390_PC32DBL:
1480 case R_390_PC64:
1481 if (info->shared)
1482 break;
1483 /* Fall through */
1484
1485 case R_390_PLT16DBL:
1486 case R_390_PLT32:
1487 case R_390_PLT32DBL:
1488 case R_390_PLT64:
1489 case R_390_PLTOFF16:
1490 case R_390_PLTOFF32:
1491 case R_390_PLTOFF64:
1492 if (h != NULL)
1493 {
1494 if (h->plt.refcount > 0)
1495 h->plt.refcount -= 1;
1496 }
1497 break;
1498
1499 case R_390_GOTPLT12:
1500 case R_390_GOTPLT16:
1501 case R_390_GOTPLT20:
1502 case R_390_GOTPLT32:
1503 case R_390_GOTPLT64:
1504 case R_390_GOTPLTENT:
1505 if (h != NULL)
1506 {
1507 if (h->plt.refcount > 0)
1508 {
1509 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1510 h->plt.refcount -= 1;
1511 }
1512 }
1513 else if (local_got_refcounts != NULL)
1514 {
1515 if (local_got_refcounts[r_symndx] > 0)
1516 local_got_refcounts[r_symndx] -= 1;
1517 }
1518 break;
1519
1520 default:
1521 break;
1522 }
1523 }
1524
1525 return TRUE;
1526 }
1527
1528 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1529 entry but we found we will not create any. Called when we find we will
1530 not have any PLT for this symbol, by for example
1531 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1532 or elf_s390_size_dynamic_sections if no dynamic sections will be
1533 created (we're only linking static objects). */
1534
1535 static void
1536 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1537 {
1538 if (h->elf.root.type == bfd_link_hash_warning)
1539 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1540
1541 if (h->gotplt_refcount <= 0)
1542 return;
1543
1544 /* We simply add the number of gotplt references to the number
1545 * of got references for this symbol. */
1546 h->elf.got.refcount += h->gotplt_refcount;
1547 h->gotplt_refcount = -1;
1548 }
1549
1550 /* Adjust a symbol defined by a dynamic object and referenced by a
1551 regular object. The current definition is in some section of the
1552 dynamic object, but we're not including those sections. We have to
1553 change the definition to something the rest of the link can
1554 understand. */
1555
1556 static bfd_boolean
1557 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1558 struct elf_link_hash_entry *h)
1559 {
1560 struct elf_s390_link_hash_table *htab;
1561 asection *s;
1562
1563 /* STT_GNU_IFUNC symbol must go through PLT. */
1564 if (s390_is_ifunc_symbol_p (h))
1565 return TRUE;
1566
1567 /* If this is a function, put it in the procedure linkage table. We
1568 will fill in the contents of the procedure linkage table later
1569 (although we could actually do it here). */
1570 if (h->type == STT_FUNC
1571 || h->needs_plt)
1572 {
1573 if (h->plt.refcount <= 0
1574 || SYMBOL_CALLS_LOCAL (info, h)
1575 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1576 && h->root.type == bfd_link_hash_undefweak))
1577 {
1578 /* This case can occur if we saw a PLT32 reloc in an input
1579 file, but the symbol was never referred to by a dynamic
1580 object, or if all references were garbage collected. In
1581 such a case, we don't actually need to build a procedure
1582 linkage table, and we can just do a PC32 reloc instead. */
1583 h->plt.offset = (bfd_vma) -1;
1584 h->needs_plt = 0;
1585 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1586 }
1587
1588 return TRUE;
1589 }
1590 else
1591 /* It's possible that we incorrectly decided a .plt reloc was
1592 needed for an R_390_PC32 reloc to a non-function sym in
1593 check_relocs. We can't decide accurately between function and
1594 non-function syms in check-relocs; Objects loaded later in
1595 the link may change h->type. So fix it now. */
1596 h->plt.offset = (bfd_vma) -1;
1597
1598 /* If this is a weak symbol, and there is a real definition, the
1599 processor independent code will have arranged for us to see the
1600 real definition first, and we can just use the same value. */
1601 if (h->u.weakdef != NULL)
1602 {
1603 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1604 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1605 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1606 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1607 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1608 h->non_got_ref = h->u.weakdef->non_got_ref;
1609 return TRUE;
1610 }
1611
1612 /* This is a reference to a symbol defined by a dynamic object which
1613 is not a function. */
1614
1615 /* If we are creating a shared library, we must presume that the
1616 only references to the symbol are via the global offset table.
1617 For such cases we need not do anything here; the relocations will
1618 be handled correctly by relocate_section. */
1619 if (info->shared)
1620 return TRUE;
1621
1622 /* If there are no references to this symbol that do not use the
1623 GOT, we don't need to generate a copy reloc. */
1624 if (!h->non_got_ref)
1625 return TRUE;
1626
1627 /* If -z nocopyreloc was given, we won't generate them either. */
1628 if (info->nocopyreloc)
1629 {
1630 h->non_got_ref = 0;
1631 return TRUE;
1632 }
1633
1634 if (ELIMINATE_COPY_RELOCS)
1635 {
1636 struct elf_s390_link_hash_entry * eh;
1637 struct elf_dyn_relocs *p;
1638
1639 eh = (struct elf_s390_link_hash_entry *) h;
1640 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1641 {
1642 s = p->sec->output_section;
1643 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1644 break;
1645 }
1646
1647 /* If we didn't find any dynamic relocs in read-only sections, then
1648 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1649 if (p == NULL)
1650 {
1651 h->non_got_ref = 0;
1652 return TRUE;
1653 }
1654 }
1655
1656 /* We must allocate the symbol in our .dynbss section, which will
1657 become part of the .bss section of the executable. There will be
1658 an entry for this symbol in the .dynsym section. The dynamic
1659 object will contain position independent code, so all references
1660 from the dynamic object to this symbol will go through the global
1661 offset table. The dynamic linker will use the .dynsym entry to
1662 determine the address it must put in the global offset table, so
1663 both the dynamic object and the regular object will refer to the
1664 same memory location for the variable. */
1665
1666 htab = elf_s390_hash_table (info);
1667 if (htab == NULL)
1668 return FALSE;
1669
1670 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1671 copy the initial value out of the dynamic object and into the
1672 runtime process image. */
1673 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1674 {
1675 htab->srelbss->size += sizeof (Elf64_External_Rela);
1676 h->needs_copy = 1;
1677 }
1678
1679 s = htab->sdynbss;
1680
1681 return _bfd_elf_adjust_dynamic_copy (h, s);
1682 }
1683
1684 /* Allocate space in .plt, .got and associated reloc sections for
1685 dynamic relocs. */
1686
1687 static bfd_boolean
1688 allocate_dynrelocs (struct elf_link_hash_entry *h,
1689 void * inf)
1690 {
1691 struct bfd_link_info *info;
1692 struct elf_s390_link_hash_table *htab;
1693 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1694 struct elf_dyn_relocs *p;
1695
1696 if (h->root.type == bfd_link_hash_indirect)
1697 return TRUE;
1698
1699 info = (struct bfd_link_info *) inf;
1700 htab = elf_s390_hash_table (info);
1701 if (htab == NULL)
1702 return FALSE;
1703
1704 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1705 here if it is defined and referenced in a non-shared object. */
1706 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1707 return s390_elf_allocate_ifunc_dyn_relocs (info, h,
1708 &eh->dyn_relocs);
1709 else if (htab->elf.dynamic_sections_created
1710 && h->plt.refcount > 0)
1711 {
1712 /* Make sure this symbol is output as a dynamic symbol.
1713 Undefined weak syms won't yet be marked as dynamic. */
1714 if (h->dynindx == -1
1715 && !h->forced_local)
1716 {
1717 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1718 return FALSE;
1719 }
1720
1721 if (info->shared
1722 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1723 {
1724 asection *s = htab->elf.splt;
1725
1726 /* If this is the first .plt entry, make room for the special
1727 first entry. */
1728 if (s->size == 0)
1729 s->size += PLT_FIRST_ENTRY_SIZE;
1730
1731 h->plt.offset = s->size;
1732
1733 /* If this symbol is not defined in a regular file, and we are
1734 not generating a shared library, then set the symbol to this
1735 location in the .plt. This is required to make function
1736 pointers compare as equal between the normal executable and
1737 the shared library. */
1738 if (! info->shared
1739 && !h->def_regular)
1740 {
1741 h->root.u.def.section = s;
1742 h->root.u.def.value = h->plt.offset;
1743 }
1744
1745 /* Make room for this entry. */
1746 s->size += PLT_ENTRY_SIZE;
1747
1748 /* We also need to make an entry in the .got.plt section, which
1749 will be placed in the .got section by the linker script. */
1750 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1751
1752 /* We also need to make an entry in the .rela.plt section. */
1753 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1754 }
1755 else
1756 {
1757 h->plt.offset = (bfd_vma) -1;
1758 h->needs_plt = 0;
1759 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1760 }
1761 }
1762 else
1763 {
1764 h->plt.offset = (bfd_vma) -1;
1765 h->needs_plt = 0;
1766 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1767 }
1768
1769 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1770 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1771 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1772 we can save the dynamic TLS relocation. */
1773 if (h->got.refcount > 0
1774 && !info->shared
1775 && h->dynindx == -1
1776 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1777 {
1778 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1779 /* For the GOTIE access without a literal pool entry the offset has
1780 to be stored somewhere. The immediate value in the instruction
1781 is not bit enough so the value is stored in the got. */
1782 {
1783 h->got.offset = htab->elf.sgot->size;
1784 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1785 }
1786 else
1787 h->got.offset = (bfd_vma) -1;
1788 }
1789 else if (h->got.refcount > 0)
1790 {
1791 asection *s;
1792 bfd_boolean dyn;
1793 int tls_type = elf_s390_hash_entry(h)->tls_type;
1794
1795 /* Make sure this symbol is output as a dynamic symbol.
1796 Undefined weak syms won't yet be marked as dynamic. */
1797 if (h->dynindx == -1
1798 && !h->forced_local)
1799 {
1800 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1801 return FALSE;
1802 }
1803
1804 s = htab->elf.sgot;
1805 h->got.offset = s->size;
1806 s->size += GOT_ENTRY_SIZE;
1807 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1808 if (tls_type == GOT_TLS_GD)
1809 s->size += GOT_ENTRY_SIZE;
1810 dyn = htab->elf.dynamic_sections_created;
1811 /* R_390_TLS_IE64 needs one dynamic relocation,
1812 R_390_TLS_GD64 needs one if local symbol and two if global. */
1813 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1814 || tls_type >= GOT_TLS_IE)
1815 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1816 else if (tls_type == GOT_TLS_GD)
1817 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1818 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1819 || h->root.type != bfd_link_hash_undefweak)
1820 && (info->shared
1821 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1822 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1823 }
1824 else
1825 h->got.offset = (bfd_vma) -1;
1826
1827 if (eh->dyn_relocs == NULL)
1828 return TRUE;
1829
1830 /* In the shared -Bsymbolic case, discard space allocated for
1831 dynamic pc-relative relocs against symbols which turn out to be
1832 defined in regular objects. For the normal shared case, discard
1833 space for pc-relative relocs that have become local due to symbol
1834 visibility changes. */
1835
1836 if (info->shared)
1837 {
1838 if (SYMBOL_CALLS_LOCAL (info, h))
1839 {
1840 struct elf_dyn_relocs **pp;
1841
1842 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1843 {
1844 p->count -= p->pc_count;
1845 p->pc_count = 0;
1846 if (p->count == 0)
1847 *pp = p->next;
1848 else
1849 pp = &p->next;
1850 }
1851 }
1852
1853 /* Also discard relocs on undefined weak syms with non-default
1854 visibility. */
1855 if (eh->dyn_relocs != NULL
1856 && h->root.type == bfd_link_hash_undefweak)
1857 {
1858 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1859 eh->dyn_relocs = NULL;
1860
1861 /* Make sure undefined weak symbols are output as a dynamic
1862 symbol in PIEs. */
1863 else if (h->dynindx == -1
1864 && !h->forced_local)
1865 {
1866 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1867 return FALSE;
1868 }
1869 }
1870 }
1871 else if (ELIMINATE_COPY_RELOCS)
1872 {
1873 /* For the non-shared case, discard space for relocs against
1874 symbols which turn out to need copy relocs or are not
1875 dynamic. */
1876
1877 if (!h->non_got_ref
1878 && ((h->def_dynamic
1879 && !h->def_regular)
1880 || (htab->elf.dynamic_sections_created
1881 && (h->root.type == bfd_link_hash_undefweak
1882 || h->root.type == bfd_link_hash_undefined))))
1883 {
1884 /* Make sure this symbol is output as a dynamic symbol.
1885 Undefined weak syms won't yet be marked as dynamic. */
1886 if (h->dynindx == -1
1887 && !h->forced_local)
1888 {
1889 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1890 return FALSE;
1891 }
1892
1893 /* If that succeeded, we know we'll be keeping all the
1894 relocs. */
1895 if (h->dynindx != -1)
1896 goto keep;
1897 }
1898
1899 eh->dyn_relocs = NULL;
1900
1901 keep: ;
1902 }
1903
1904 /* Finally, allocate space. */
1905 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1906 {
1907 asection *sreloc = elf_section_data (p->sec)->sreloc;
1908 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1909 }
1910
1911 return TRUE;
1912 }
1913
1914 /* Find any dynamic relocs that apply to read-only sections. */
1915
1916 static bfd_boolean
1917 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1918 {
1919 struct elf_s390_link_hash_entry *eh;
1920 struct elf_dyn_relocs *p;
1921
1922 eh = (struct elf_s390_link_hash_entry *) h;
1923 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1924 {
1925 asection *s = p->sec->output_section;
1926
1927 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1928 {
1929 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1930
1931 info->flags |= DF_TEXTREL;
1932
1933 /* Not an error, just cut short the traversal. */
1934 return FALSE;
1935 }
1936 }
1937 return TRUE;
1938 }
1939
1940 /* Set the sizes of the dynamic sections. */
1941
1942 static bfd_boolean
1943 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1944 struct bfd_link_info *info)
1945 {
1946 struct elf_s390_link_hash_table *htab;
1947 bfd *dynobj;
1948 asection *s;
1949 bfd_boolean relocs;
1950 bfd *ibfd;
1951
1952 htab = elf_s390_hash_table (info);
1953 if (htab == NULL)
1954 return FALSE;
1955
1956 dynobj = htab->elf.dynobj;
1957 if (dynobj == NULL)
1958 abort ();
1959
1960 if (htab->elf.dynamic_sections_created)
1961 {
1962 /* Set the contents of the .interp section to the interpreter. */
1963 if (info->executable)
1964 {
1965 s = bfd_get_linker_section (dynobj, ".interp");
1966 if (s == NULL)
1967 abort ();
1968 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1969 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1970 }
1971 }
1972
1973 /* Set up .got offsets for local syms, and space for local dynamic
1974 relocs. */
1975 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
1976 {
1977 bfd_signed_vma *local_got;
1978 bfd_signed_vma *end_local_got;
1979 char *local_tls_type;
1980 bfd_size_type locsymcount;
1981 Elf_Internal_Shdr *symtab_hdr;
1982 asection *srela;
1983 struct plt_entry *local_plt;
1984 unsigned int i;
1985
1986 if (! is_s390_elf (ibfd))
1987 continue;
1988
1989 for (s = ibfd->sections; s != NULL; s = s->next)
1990 {
1991 struct elf_dyn_relocs *p;
1992
1993 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1994 {
1995 if (!bfd_is_abs_section (p->sec)
1996 && bfd_is_abs_section (p->sec->output_section))
1997 {
1998 /* Input section has been discarded, either because
1999 it is a copy of a linkonce section or due to
2000 linker script /DISCARD/, so we'll be discarding
2001 the relocs too. */
2002 }
2003 else if (p->count != 0)
2004 {
2005 srela = elf_section_data (p->sec)->sreloc;
2006 srela->size += p->count * sizeof (Elf64_External_Rela);
2007 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2008 info->flags |= DF_TEXTREL;
2009 }
2010 }
2011 }
2012
2013 local_got = elf_local_got_refcounts (ibfd);
2014 if (!local_got)
2015 continue;
2016
2017 symtab_hdr = &elf_symtab_hdr (ibfd);
2018 locsymcount = symtab_hdr->sh_info;
2019 end_local_got = local_got + locsymcount;
2020 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2021 s = htab->elf.sgot;
2022 srela = htab->elf.srelgot;
2023 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2024 {
2025 if (*local_got > 0)
2026 {
2027 *local_got = s->size;
2028 s->size += GOT_ENTRY_SIZE;
2029 if (*local_tls_type == GOT_TLS_GD)
2030 s->size += GOT_ENTRY_SIZE;
2031 if (info->shared)
2032 srela->size += sizeof (Elf64_External_Rela);
2033 }
2034 else
2035 *local_got = (bfd_vma) -1;
2036 }
2037
2038 local_plt = elf_s390_local_plt (ibfd);
2039 for (i = 0; i < symtab_hdr->sh_info; i++)
2040 {
2041 if (local_plt[i].plt.refcount > 0)
2042 {
2043 local_plt[i].plt.offset = htab->elf.iplt->size;
2044 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2045 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2046 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2047 }
2048 else
2049 local_plt[i].plt.offset = (bfd_vma) -1;
2050 }
2051 }
2052
2053 if (htab->tls_ldm_got.refcount > 0)
2054 {
2055 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2056 relocs. */
2057 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2058 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2059 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2060 }
2061 else
2062 htab->tls_ldm_got.offset = -1;
2063
2064 /* Allocate global sym .plt and .got entries, and space for global
2065 sym dynamic relocs. */
2066 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2067
2068 /* We now have determined the sizes of the various dynamic sections.
2069 Allocate memory for them. */
2070 relocs = FALSE;
2071 for (s = dynobj->sections; s != NULL; s = s->next)
2072 {
2073 if ((s->flags & SEC_LINKER_CREATED) == 0)
2074 continue;
2075
2076 if (s == htab->elf.splt
2077 || s == htab->elf.sgot
2078 || s == htab->elf.sgotplt
2079 || s == htab->sdynbss
2080 || s == htab->elf.iplt
2081 || s == htab->elf.igotplt
2082 || s == htab->irelifunc)
2083 {
2084 /* Strip this section if we don't need it; see the
2085 comment below. */
2086 }
2087 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2088 {
2089 if (s->size != 0 && s != htab->elf.srelplt)
2090 relocs = TRUE;
2091
2092 /* We use the reloc_count field as a counter if we need
2093 to copy relocs into the output file. */
2094 s->reloc_count = 0;
2095 }
2096 else
2097 {
2098 /* It's not one of our sections, so don't allocate space. */
2099 continue;
2100 }
2101
2102 if (s->size == 0)
2103 {
2104 /* If we don't need this section, strip it from the
2105 output file. This is to handle .rela.bss and
2106 .rela.plt. We must create it in
2107 create_dynamic_sections, because it must be created
2108 before the linker maps input sections to output
2109 sections. The linker does that before
2110 adjust_dynamic_symbol is called, and it is that
2111 function which decides whether anything needs to go
2112 into these sections. */
2113
2114 s->flags |= SEC_EXCLUDE;
2115 continue;
2116 }
2117
2118 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2119 continue;
2120
2121 /* Allocate memory for the section contents. We use bfd_zalloc
2122 here in case unused entries are not reclaimed before the
2123 section's contents are written out. This should not happen,
2124 but this way if it does, we get a R_390_NONE reloc instead
2125 of garbage. */
2126 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2127 if (s->contents == NULL)
2128 return FALSE;
2129 }
2130
2131 if (htab->elf.dynamic_sections_created)
2132 {
2133 /* Add some entries to the .dynamic section. We fill in the
2134 values later, in elf_s390_finish_dynamic_sections, but we
2135 must add the entries now so that we get the correct size for
2136 the .dynamic section. The DT_DEBUG entry is filled in by the
2137 dynamic linker and used by the debugger. */
2138 #define add_dynamic_entry(TAG, VAL) \
2139 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2140
2141 if (info->executable)
2142 {
2143 if (!add_dynamic_entry (DT_DEBUG, 0))
2144 return FALSE;
2145 }
2146
2147 if (htab->elf.splt->size != 0)
2148 {
2149 if (!add_dynamic_entry (DT_PLTGOT, 0)
2150 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2151 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2152 || !add_dynamic_entry (DT_JMPREL, 0))
2153 return FALSE;
2154 }
2155
2156 if (relocs)
2157 {
2158 if (!add_dynamic_entry (DT_RELA, 0)
2159 || !add_dynamic_entry (DT_RELASZ, 0)
2160 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2161 return FALSE;
2162
2163 /* If any dynamic relocs apply to a read-only section,
2164 then we need a DT_TEXTREL entry. */
2165 if ((info->flags & DF_TEXTREL) == 0)
2166 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2167 info);
2168
2169 if ((info->flags & DF_TEXTREL) != 0)
2170 {
2171 if (!add_dynamic_entry (DT_TEXTREL, 0))
2172 return FALSE;
2173 }
2174 }
2175 }
2176 #undef add_dynamic_entry
2177
2178 return TRUE;
2179 }
2180
2181 /* Return the base VMA address which should be subtracted from real addresses
2182 when resolving @dtpoff relocation.
2183 This is PT_TLS segment p_vaddr. */
2184
2185 static bfd_vma
2186 dtpoff_base (struct bfd_link_info *info)
2187 {
2188 /* If tls_sec is NULL, we should have signalled an error already. */
2189 if (elf_hash_table (info)->tls_sec == NULL)
2190 return 0;
2191 return elf_hash_table (info)->tls_sec->vma;
2192 }
2193
2194 /* Return the relocation value for @tpoff relocation
2195 if STT_TLS virtual address is ADDRESS. */
2196
2197 static bfd_vma
2198 tpoff (struct bfd_link_info *info, bfd_vma address)
2199 {
2200 struct elf_link_hash_table *htab = elf_hash_table (info);
2201
2202 /* If tls_sec is NULL, we should have signalled an error already. */
2203 if (htab->tls_sec == NULL)
2204 return 0;
2205 return htab->tls_size + htab->tls_sec->vma - address;
2206 }
2207
2208 /* Complain if TLS instruction relocation is against an invalid
2209 instruction. */
2210
2211 static void
2212 invalid_tls_insn (bfd *input_bfd,
2213 asection *input_section,
2214 Elf_Internal_Rela *rel)
2215 {
2216 reloc_howto_type *howto;
2217
2218 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2219 (*_bfd_error_handler)
2220 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2221 input_bfd,
2222 input_section,
2223 (long) rel->r_offset,
2224 howto->name);
2225 bfd_set_error (bfd_error_bad_value);
2226 }
2227
2228 /* Relocate a 390 ELF section. */
2229
2230 static bfd_boolean
2231 elf_s390_relocate_section (bfd *output_bfd,
2232 struct bfd_link_info *info,
2233 bfd *input_bfd,
2234 asection *input_section,
2235 bfd_byte *contents,
2236 Elf_Internal_Rela *relocs,
2237 Elf_Internal_Sym *local_syms,
2238 asection **local_sections)
2239 {
2240 struct elf_s390_link_hash_table *htab;
2241 Elf_Internal_Shdr *symtab_hdr;
2242 struct elf_link_hash_entry **sym_hashes;
2243 bfd_vma *local_got_offsets;
2244 Elf_Internal_Rela *rel;
2245 Elf_Internal_Rela *relend;
2246
2247 BFD_ASSERT (is_s390_elf (input_bfd));
2248
2249 htab = elf_s390_hash_table (info);
2250 if (htab == NULL)
2251 return FALSE;
2252
2253 symtab_hdr = &elf_symtab_hdr (input_bfd);
2254 sym_hashes = elf_sym_hashes (input_bfd);
2255 local_got_offsets = elf_local_got_offsets (input_bfd);
2256
2257 rel = relocs;
2258 relend = relocs + input_section->reloc_count;
2259 for (; rel < relend; rel++)
2260 {
2261 unsigned int r_type;
2262 reloc_howto_type *howto;
2263 unsigned long r_symndx;
2264 struct elf_link_hash_entry *h;
2265 Elf_Internal_Sym *sym;
2266 asection *sec;
2267 bfd_vma off;
2268 bfd_vma relocation;
2269 bfd_boolean unresolved_reloc;
2270 bfd_reloc_status_type r;
2271 int tls_type;
2272 asection *base_got = htab->elf.sgot;
2273
2274 r_type = ELF64_R_TYPE (rel->r_info);
2275 if (r_type == (int) R_390_GNU_VTINHERIT
2276 || r_type == (int) R_390_GNU_VTENTRY)
2277 continue;
2278 if (r_type >= (int) R_390_max)
2279 {
2280 bfd_set_error (bfd_error_bad_value);
2281 return FALSE;
2282 }
2283
2284 howto = elf_howto_table + r_type;
2285 r_symndx = ELF64_R_SYM (rel->r_info);
2286
2287 h = NULL;
2288 sym = NULL;
2289 sec = NULL;
2290 unresolved_reloc = FALSE;
2291 if (r_symndx < symtab_hdr->sh_info)
2292 {
2293 sym = local_syms + r_symndx;
2294 sec = local_sections[r_symndx];
2295
2296 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2297 {
2298 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2299 if (local_plt == NULL)
2300 return FALSE;
2301
2302 /* Address of the PLT slot. */
2303 relocation = (htab->elf.iplt->output_section->vma
2304 + htab->elf.iplt->output_offset
2305 + local_plt[r_symndx].plt.offset);
2306
2307 switch (r_type)
2308 {
2309 case R_390_GOTPLT12:
2310 case R_390_GOTPLT16:
2311 case R_390_GOTPLT20:
2312 case R_390_GOTPLT32:
2313 case R_390_GOTPLT64:
2314 case R_390_GOTPLTENT:
2315 case R_390_GOT12:
2316 case R_390_GOT16:
2317 case R_390_GOT20:
2318 case R_390_GOT32:
2319 case R_390_GOT64:
2320 case R_390_GOTENT:
2321 {
2322 /* Write the PLT slot address into the GOT slot. */
2323 bfd_put_64 (output_bfd, relocation,
2324 htab->elf.sgot->contents +
2325 local_got_offsets[r_symndx]);
2326 relocation = (local_got_offsets[r_symndx] +
2327 htab->elf.sgot->output_offset);
2328
2329 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2330 relocation += htab->elf.sgot->output_section->vma;
2331 break;
2332 }
2333 default:
2334 break;
2335 }
2336 /* The output section is needed later in
2337 finish_dynamic_section when creating the dynamic
2338 relocation. */
2339 local_plt[r_symndx].sec = sec;
2340 goto do_relocation;
2341 }
2342 else
2343 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2344 }
2345 else
2346 {
2347 bfd_boolean warned ATTRIBUTE_UNUSED;
2348
2349 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2350 r_symndx, symtab_hdr, sym_hashes,
2351 h, sec, relocation,
2352 unresolved_reloc, warned);
2353 }
2354
2355 if (sec != NULL && discarded_section (sec))
2356 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2357 rel, 1, relend, howto, 0, contents);
2358
2359 if (info->relocatable)
2360 continue;
2361
2362 switch (r_type)
2363 {
2364 case R_390_GOTPLT12:
2365 case R_390_GOTPLT16:
2366 case R_390_GOTPLT20:
2367 case R_390_GOTPLT32:
2368 case R_390_GOTPLT64:
2369 case R_390_GOTPLTENT:
2370 /* There are three cases for a GOTPLT relocation. 1) The
2371 relocation is against the jump slot entry of a plt that
2372 will get emitted to the output file. 2) The relocation
2373 is against the jump slot of a plt entry that has been
2374 removed. elf_s390_adjust_gotplt has created a GOT entry
2375 as replacement. 3) The relocation is against a local symbol.
2376 Cases 2) and 3) are the same as the GOT relocation code
2377 so we just have to test for case 1 and fall through for
2378 the other two. */
2379 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2380 {
2381 bfd_vma plt_index;
2382
2383 if (s390_is_ifunc_symbol_p (h))
2384 {
2385 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2386 relocation = (plt_index * GOT_ENTRY_SIZE +
2387 htab->elf.igotplt->output_offset);
2388 if (r_type == R_390_GOTPLTENT)
2389 relocation += htab->elf.igotplt->output_section->vma;
2390 }
2391 else
2392 {
2393 /* Calc. index no.
2394 Current offset - size first entry / entry size. */
2395 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2396 PLT_ENTRY_SIZE;
2397
2398 /* Offset in GOT is PLT index plus GOT headers(3)
2399 times 4, addr & GOT addr. */
2400 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2401 if (r_type == R_390_GOTPLTENT)
2402 relocation += htab->elf.sgot->output_section->vma;
2403 }
2404 unresolved_reloc = FALSE;
2405 break;
2406 }
2407 /* Fall through. */
2408
2409 case R_390_GOT12:
2410 case R_390_GOT16:
2411 case R_390_GOT20:
2412 case R_390_GOT32:
2413 case R_390_GOT64:
2414 case R_390_GOTENT:
2415 /* Relocation is to the entry for this symbol in the global
2416 offset table. */
2417 if (base_got == NULL)
2418 abort ();
2419
2420 if (h != NULL)
2421 {
2422 bfd_boolean dyn;
2423
2424 off = h->got.offset;
2425 dyn = htab->elf.dynamic_sections_created;
2426
2427 if (s390_is_ifunc_symbol_p (h))
2428 {
2429 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2430 if (off == (bfd_vma)-1)
2431 {
2432 /* No explicit GOT usage so redirect to the
2433 got.iplt slot. */
2434 base_got = htab->elf.igotplt;
2435 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2436 }
2437 else
2438 {
2439 /* Explicit GOT slots must contain the address
2440 of the PLT slot. This will be handled in
2441 finish_dynamic_symbol. */
2442 }
2443 }
2444 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2445 || (info->shared
2446 && SYMBOL_REFERENCES_LOCAL (info, h))
2447 || (ELF_ST_VISIBILITY (h->other)
2448 && h->root.type == bfd_link_hash_undefweak))
2449 {
2450 /* This is actually a static link, or it is a
2451 -Bsymbolic link and the symbol is defined
2452 locally, or the symbol was forced to be local
2453 because of a version file. We must initialize
2454 this entry in the global offset table. Since the
2455 offset must always be a multiple of 2, we use the
2456 least significant bit to record whether we have
2457 initialized it already.
2458
2459 When doing a dynamic link, we create a .rel.got
2460 relocation entry to initialize the value. This
2461 is done in the finish_dynamic_symbol routine. */
2462 if ((off & 1) != 0)
2463 off &= ~1;
2464 else
2465 {
2466 bfd_put_64 (output_bfd, relocation,
2467 base_got->contents + off);
2468 h->got.offset |= 1;
2469 }
2470 }
2471 else
2472 unresolved_reloc = FALSE;
2473 }
2474 else
2475 {
2476 if (local_got_offsets == NULL)
2477 abort ();
2478
2479 off = local_got_offsets[r_symndx];
2480
2481 /* The offset must always be a multiple of 8. We use
2482 the least significant bit to record whether we have
2483 already generated the necessary reloc. */
2484 if ((off & 1) != 0)
2485 off &= ~1;
2486 else
2487 {
2488 bfd_put_64 (output_bfd, relocation,
2489 htab->elf.sgot->contents + off);
2490
2491 if (info->shared)
2492 {
2493 asection *s;
2494 Elf_Internal_Rela outrel;
2495 bfd_byte *loc;
2496
2497 s = htab->elf.srelgot;
2498 if (s == NULL)
2499 abort ();
2500
2501 outrel.r_offset = (htab->elf.sgot->output_section->vma
2502 + htab->elf.sgot->output_offset
2503 + off);
2504 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2505 outrel.r_addend = relocation;
2506 loc = s->contents;
2507 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2508 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2509 }
2510
2511 local_got_offsets[r_symndx] |= 1;
2512 }
2513 }
2514
2515 if (off >= (bfd_vma) -2)
2516 abort ();
2517
2518 relocation = base_got->output_offset + off;
2519
2520 /* For @GOTENT the relocation is against the offset between
2521 the instruction and the symbols entry in the GOT and not
2522 between the start of the GOT and the symbols entry. We
2523 add the vma of the GOT to get the correct value. */
2524 if ( r_type == R_390_GOTENT
2525 || r_type == R_390_GOTPLTENT)
2526 relocation += base_got->output_section->vma;
2527
2528 break;
2529
2530 case R_390_GOTOFF16:
2531 case R_390_GOTOFF32:
2532 case R_390_GOTOFF64:
2533 /* Relocation is relative to the start of the global offset
2534 table. */
2535
2536 /* Note that sgot->output_offset is not involved in this
2537 calculation. We always want the start of .got. If we
2538 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2539 permitted by the ABI, we might have to change this
2540 calculation. */
2541 relocation -= htab->elf.sgot->output_section->vma;
2542 break;
2543
2544 case R_390_GOTPC:
2545 case R_390_GOTPCDBL:
2546 /* Use global offset table as symbol value. */
2547 relocation = htab->elf.sgot->output_section->vma;
2548 unresolved_reloc = FALSE;
2549 break;
2550
2551 case R_390_PLT16DBL:
2552 case R_390_PLT32:
2553 case R_390_PLT32DBL:
2554 case R_390_PLT64:
2555 /* Relocation is to the entry for this symbol in the
2556 procedure linkage table. */
2557
2558 /* Resolve a PLT32 reloc against a local symbol directly,
2559 without using the procedure linkage table. */
2560 if (h == NULL)
2561 break;
2562
2563 if (h->plt.offset == (bfd_vma) -1
2564 || (htab->elf.splt == NULL && htab->elf.iplt == NULL))
2565 {
2566 /* We didn't make a PLT entry for this symbol. This
2567 happens when statically linking PIC code, or when
2568 using -Bsymbolic. */
2569 break;
2570 }
2571 if (s390_is_ifunc_symbol_p (h))
2572 relocation = (htab->elf.iplt->output_section->vma
2573 + htab->elf.iplt->output_offset
2574 + h->plt.offset);
2575 else
2576 relocation = (htab->elf.splt->output_section->vma
2577 + htab->elf.splt->output_offset
2578 + h->plt.offset);
2579 unresolved_reloc = FALSE;
2580 break;
2581
2582 case R_390_PLTOFF16:
2583 case R_390_PLTOFF32:
2584 case R_390_PLTOFF64:
2585 /* Relocation is to the entry for this symbol in the
2586 procedure linkage table relative to the start of the GOT. */
2587
2588 /* For local symbols or if we didn't make a PLT entry for
2589 this symbol resolve the symbol directly. */
2590 if ( h == NULL
2591 || h->plt.offset == (bfd_vma) -1
2592 || htab->elf.splt == NULL)
2593 {
2594 relocation -= htab->elf.sgot->output_section->vma;
2595 break;
2596 }
2597
2598 if (s390_is_ifunc_symbol_p (h))
2599 relocation = (htab->elf.iplt->output_section->vma
2600 + htab->elf.iplt->output_offset
2601 + h->plt.offset
2602 - htab->elf.sgot->output_section->vma);
2603 else
2604 relocation = (htab->elf.splt->output_section->vma
2605 + htab->elf.splt->output_offset
2606 + h->plt.offset
2607 - htab->elf.sgot->output_section->vma);
2608 unresolved_reloc = FALSE;
2609 break;
2610
2611 case R_390_8:
2612 case R_390_16:
2613 case R_390_32:
2614 case R_390_64:
2615 case R_390_PC16:
2616 case R_390_PC16DBL:
2617 case R_390_PC32:
2618 case R_390_PC32DBL:
2619 case R_390_PC64:
2620
2621 if (h != NULL
2622 && s390_is_ifunc_symbol_p (h)
2623 && h->def_regular)
2624 {
2625 if (!info->shared || !h->non_got_ref)
2626 {
2627 /* For a non-shared object STT_GNU_IFUNC symbol must
2628 go through PLT. */
2629 relocation = (htab->elf.iplt->output_section->vma
2630 + htab->elf.iplt->output_offset
2631 + h ->plt.offset);
2632 goto do_relocation;
2633 }
2634 else
2635 {
2636 /* For shared objects a runtime relocation is needed. */
2637
2638 Elf_Internal_Rela outrel;
2639 asection *sreloc;
2640
2641 /* Need a dynamic relocation to get the real function
2642 address. */
2643 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2644 info,
2645 input_section,
2646 rel->r_offset);
2647 if (outrel.r_offset == (bfd_vma) -1
2648 || outrel.r_offset == (bfd_vma) -2)
2649 abort ();
2650
2651 outrel.r_offset += (input_section->output_section->vma
2652 + input_section->output_offset);
2653
2654 if (h->dynindx == -1
2655 || h->forced_local
2656 || info->executable)
2657 {
2658 /* This symbol is resolved locally. */
2659 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2660 outrel.r_addend = (h->root.u.def.value
2661 + h->root.u.def.section->output_section->vma
2662 + h->root.u.def.section->output_offset);
2663 }
2664 else
2665 {
2666 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2667 outrel.r_addend = 0;
2668 }
2669
2670 sreloc = htab->elf.irelifunc;
2671 elf_append_rela (output_bfd, sreloc, &outrel);
2672
2673 /* If this reloc is against an external symbol, we
2674 do not want to fiddle with the addend. Otherwise,
2675 we need to include the symbol value so that it
2676 becomes an addend for the dynamic reloc. For an
2677 internal symbol, we have updated addend. */
2678 continue;
2679 }
2680 }
2681
2682 if ((input_section->flags & SEC_ALLOC) == 0)
2683 break;
2684
2685 if ((info->shared
2686 && (h == NULL
2687 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2688 || h->root.type != bfd_link_hash_undefweak)
2689 && ((r_type != R_390_PC16
2690 && r_type != R_390_PC16DBL
2691 && r_type != R_390_PC32
2692 && r_type != R_390_PC32DBL
2693 && r_type != R_390_PC64)
2694 || !SYMBOL_CALLS_LOCAL (info, h)))
2695 || (ELIMINATE_COPY_RELOCS
2696 && !info->shared
2697 && h != NULL
2698 && h->dynindx != -1
2699 && !h->non_got_ref
2700 && ((h->def_dynamic
2701 && !h->def_regular)
2702 || h->root.type == bfd_link_hash_undefweak
2703 || h->root.type == bfd_link_hash_undefined)))
2704 {
2705 Elf_Internal_Rela outrel;
2706 bfd_boolean skip, relocate;
2707 asection *sreloc;
2708 bfd_byte *loc;
2709
2710 /* When generating a shared object, these relocations
2711 are copied into the output file to be resolved at run
2712 time. */
2713 skip = FALSE;
2714 relocate = FALSE;
2715
2716 outrel.r_offset =
2717 _bfd_elf_section_offset (output_bfd, info, input_section,
2718 rel->r_offset);
2719 if (outrel.r_offset == (bfd_vma) -1)
2720 skip = TRUE;
2721 else if (outrel.r_offset == (bfd_vma) -2)
2722 skip = TRUE, relocate = TRUE;
2723
2724 outrel.r_offset += (input_section->output_section->vma
2725 + input_section->output_offset);
2726
2727 if (skip)
2728 memset (&outrel, 0, sizeof outrel);
2729 else if (h != NULL
2730 && h->dynindx != -1
2731 && (r_type == R_390_PC16
2732 || r_type == R_390_PC16DBL
2733 || r_type == R_390_PC32
2734 || r_type == R_390_PC32DBL
2735 || r_type == R_390_PC64
2736 || !info->shared
2737 || !SYMBOLIC_BIND (info, h)
2738 || !h->def_regular))
2739 {
2740 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2741 outrel.r_addend = rel->r_addend;
2742 }
2743 else
2744 {
2745 /* This symbol is local, or marked to become local. */
2746 outrel.r_addend = relocation + rel->r_addend;
2747 if (r_type == R_390_64)
2748 {
2749 relocate = TRUE;
2750 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2751 }
2752 else
2753 {
2754 long sindx;
2755
2756 if (bfd_is_abs_section (sec))
2757 sindx = 0;
2758 else if (sec == NULL || sec->owner == NULL)
2759 {
2760 bfd_set_error(bfd_error_bad_value);
2761 return FALSE;
2762 }
2763 else
2764 {
2765 asection *osec;
2766
2767 osec = sec->output_section;
2768 sindx = elf_section_data (osec)->dynindx;
2769
2770 if (sindx == 0)
2771 {
2772 osec = htab->elf.text_index_section;
2773 sindx = elf_section_data (osec)->dynindx;
2774 }
2775 BFD_ASSERT (sindx != 0);
2776
2777 /* We are turning this relocation into one
2778 against a section symbol, so subtract out
2779 the output section's address but not the
2780 offset of the input section in the output
2781 section. */
2782 outrel.r_addend -= osec->vma;
2783 }
2784 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2785 }
2786 }
2787
2788 sreloc = elf_section_data (input_section)->sreloc;
2789 if (sreloc == NULL)
2790 abort ();
2791
2792 loc = sreloc->contents;
2793 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2794 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2795
2796 /* If this reloc is against an external symbol, we do
2797 not want to fiddle with the addend. Otherwise, we
2798 need to include the symbol value so that it becomes
2799 an addend for the dynamic reloc. */
2800 if (! relocate)
2801 continue;
2802 }
2803
2804 break;
2805
2806 /* Relocations for tls literal pool entries. */
2807 case R_390_TLS_IE64:
2808 if (info->shared)
2809 {
2810 Elf_Internal_Rela outrel;
2811 asection *sreloc;
2812 bfd_byte *loc;
2813
2814 outrel.r_offset = rel->r_offset
2815 + input_section->output_section->vma
2816 + input_section->output_offset;
2817 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2818 sreloc = elf_section_data (input_section)->sreloc;
2819 if (sreloc == NULL)
2820 abort ();
2821 loc = sreloc->contents;
2822 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2823 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2824 }
2825 /* Fall through. */
2826
2827 case R_390_TLS_GD64:
2828 case R_390_TLS_GOTIE64:
2829 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2830 tls_type = GOT_UNKNOWN;
2831 if (h == NULL && local_got_offsets)
2832 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2833 else if (h != NULL)
2834 {
2835 tls_type = elf_s390_hash_entry(h)->tls_type;
2836 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2837 r_type = R_390_TLS_LE64;
2838 }
2839 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2840 r_type = R_390_TLS_IE64;
2841
2842 if (r_type == R_390_TLS_LE64)
2843 {
2844 /* This relocation gets optimized away by the local exec
2845 access optimization. */
2846 BFD_ASSERT (! unresolved_reloc);
2847 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2848 contents + rel->r_offset);
2849 continue;
2850 }
2851
2852 if (htab->elf.sgot == NULL)
2853 abort ();
2854
2855 if (h != NULL)
2856 off = h->got.offset;
2857 else
2858 {
2859 if (local_got_offsets == NULL)
2860 abort ();
2861
2862 off = local_got_offsets[r_symndx];
2863 }
2864
2865 emit_tls_relocs:
2866
2867 if ((off & 1) != 0)
2868 off &= ~1;
2869 else
2870 {
2871 Elf_Internal_Rela outrel;
2872 bfd_byte *loc;
2873 int dr_type, indx;
2874
2875 if (htab->elf.srelgot == NULL)
2876 abort ();
2877
2878 outrel.r_offset = (htab->elf.sgot->output_section->vma
2879 + htab->elf.sgot->output_offset + off);
2880
2881 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2882 if (r_type == R_390_TLS_GD64)
2883 dr_type = R_390_TLS_DTPMOD;
2884 else
2885 dr_type = R_390_TLS_TPOFF;
2886 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2887 outrel.r_addend = relocation - dtpoff_base (info);
2888 else
2889 outrel.r_addend = 0;
2890 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2891 loc = htab->elf.srelgot->contents;
2892 loc += htab->elf.srelgot->reloc_count++
2893 * sizeof (Elf64_External_Rela);
2894 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2895
2896 if (r_type == R_390_TLS_GD64)
2897 {
2898 if (indx == 0)
2899 {
2900 BFD_ASSERT (! unresolved_reloc);
2901 bfd_put_64 (output_bfd,
2902 relocation - dtpoff_base (info),
2903 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2904 }
2905 else
2906 {
2907 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2908 outrel.r_offset += GOT_ENTRY_SIZE;
2909 outrel.r_addend = 0;
2910 htab->elf.srelgot->reloc_count++;
2911 loc += sizeof (Elf64_External_Rela);
2912 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2913 }
2914 }
2915
2916 if (h != NULL)
2917 h->got.offset |= 1;
2918 else
2919 local_got_offsets[r_symndx] |= 1;
2920 }
2921
2922 if (off >= (bfd_vma) -2)
2923 abort ();
2924 if (r_type == ELF64_R_TYPE (rel->r_info))
2925 {
2926 relocation = htab->elf.sgot->output_offset + off;
2927 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2928 relocation += htab->elf.sgot->output_section->vma;
2929 unresolved_reloc = FALSE;
2930 }
2931 else
2932 {
2933 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2934 contents + rel->r_offset);
2935 continue;
2936 }
2937 break;
2938
2939 case R_390_TLS_GOTIE12:
2940 case R_390_TLS_GOTIE20:
2941 case R_390_TLS_IEENT:
2942 if (h == NULL)
2943 {
2944 if (local_got_offsets == NULL)
2945 abort();
2946 off = local_got_offsets[r_symndx];
2947 if (info->shared)
2948 goto emit_tls_relocs;
2949 }
2950 else
2951 {
2952 off = h->got.offset;
2953 tls_type = elf_s390_hash_entry(h)->tls_type;
2954 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2955 goto emit_tls_relocs;
2956 }
2957
2958 if (htab->elf.sgot == NULL)
2959 abort ();
2960
2961 BFD_ASSERT (! unresolved_reloc);
2962 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2963 htab->elf.sgot->contents + off);
2964 relocation = htab->elf.sgot->output_offset + off;
2965 if (r_type == R_390_TLS_IEENT)
2966 relocation += htab->elf.sgot->output_section->vma;
2967 unresolved_reloc = FALSE;
2968 break;
2969
2970 case R_390_TLS_LDM64:
2971 if (! info->shared)
2972 /* The literal pool entry this relocation refers to gets ignored
2973 by the optimized code of the local exec model. Do nothing
2974 and the value will turn out zero. */
2975 continue;
2976
2977 if (htab->elf.sgot == NULL)
2978 abort ();
2979
2980 off = htab->tls_ldm_got.offset;
2981 if (off & 1)
2982 off &= ~1;
2983 else
2984 {
2985 Elf_Internal_Rela outrel;
2986 bfd_byte *loc;
2987
2988 if (htab->elf.srelgot == NULL)
2989 abort ();
2990
2991 outrel.r_offset = (htab->elf.sgot->output_section->vma
2992 + htab->elf.sgot->output_offset + off);
2993
2994 bfd_put_64 (output_bfd, 0,
2995 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2996 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2997 outrel.r_addend = 0;
2998 loc = htab->elf.srelgot->contents;
2999 loc += htab->elf.srelgot->reloc_count++
3000 * sizeof (Elf64_External_Rela);
3001 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3002 htab->tls_ldm_got.offset |= 1;
3003 }
3004 relocation = htab->elf.sgot->output_offset + off;
3005 unresolved_reloc = FALSE;
3006 break;
3007
3008 case R_390_TLS_LE64:
3009 if (info->shared)
3010 {
3011 /* Linking a shared library with non-fpic code requires
3012 a R_390_TLS_TPOFF relocation. */
3013 Elf_Internal_Rela outrel;
3014 asection *sreloc;
3015 bfd_byte *loc;
3016 int indx;
3017
3018 outrel.r_offset = rel->r_offset
3019 + input_section->output_section->vma
3020 + input_section->output_offset;
3021 if (h != NULL && h->dynindx != -1)
3022 indx = h->dynindx;
3023 else
3024 indx = 0;
3025 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3026 if (indx == 0)
3027 outrel.r_addend = relocation - dtpoff_base (info);
3028 else
3029 outrel.r_addend = 0;
3030 sreloc = elf_section_data (input_section)->sreloc;
3031 if (sreloc == NULL)
3032 abort ();
3033 loc = sreloc->contents;
3034 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3035 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3036 }
3037 else
3038 {
3039 BFD_ASSERT (! unresolved_reloc);
3040 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3041 contents + rel->r_offset);
3042 }
3043 continue;
3044
3045 case R_390_TLS_LDO64:
3046 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3047 relocation -= dtpoff_base (info);
3048 else
3049 /* When converting LDO to LE, we must negate. */
3050 relocation = -tpoff (info, relocation);
3051 break;
3052
3053 /* Relocations for tls instructions. */
3054 case R_390_TLS_LOAD:
3055 case R_390_TLS_GDCALL:
3056 case R_390_TLS_LDCALL:
3057 tls_type = GOT_UNKNOWN;
3058 if (h == NULL && local_got_offsets)
3059 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3060 else if (h != NULL)
3061 tls_type = elf_s390_hash_entry(h)->tls_type;
3062
3063 if (tls_type == GOT_TLS_GD)
3064 continue;
3065
3066 if (r_type == R_390_TLS_LOAD)
3067 {
3068 if (!info->shared && (h == NULL || h->dynindx == -1))
3069 {
3070 /* IE->LE transition. Four valid cases:
3071 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3072 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3073 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3074 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3075 unsigned int insn0, insn1, ry;
3076
3077 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3078 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3079 if (insn1 != 0x0004)
3080 invalid_tls_insn (input_bfd, input_section, rel);
3081 ry = 0;
3082 if ((insn0 & 0xff00f000) == 0xe3000000)
3083 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3084 ry = (insn0 & 0x000f0000);
3085 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3086 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3087 ry = (insn0 & 0x0000f000) << 4;
3088 else if ((insn0 & 0xff00f000) == 0xe300c000)
3089 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3090 ry = (insn0 & 0x000f0000);
3091 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3092 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3093 ry = (insn0 & 0x0000f000) << 4;
3094 else
3095 invalid_tls_insn (input_bfd, input_section, rel);
3096 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3097 insn1 = 0x000d;
3098 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3099 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3100 }
3101 }
3102 else if (r_type == R_390_TLS_GDCALL)
3103 {
3104 unsigned int insn0, insn1;
3105
3106 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3107 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3108 if ((insn0 & 0xffff0000) != 0xc0e50000)
3109 invalid_tls_insn (input_bfd, input_section, rel);
3110 if (!info->shared && (h == NULL || h->dynindx == -1))
3111 {
3112 /* GD->LE transition.
3113 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3114 insn0 = 0xc0040000;
3115 insn1 = 0x0000;
3116 }
3117 else
3118 {
3119 /* GD->IE transition.
3120 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3121 insn0 = 0xe322c000;
3122 insn1 = 0x0004;
3123 }
3124 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3125 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3126 }
3127 else if (r_type == R_390_TLS_LDCALL)
3128 {
3129 if (!info->shared)
3130 {
3131 unsigned int insn0, insn1;
3132
3133 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3134 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3135 if ((insn0 & 0xffff0000) != 0xc0e50000)
3136 invalid_tls_insn (input_bfd, input_section, rel);
3137 /* LD->LE transition.
3138 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3139 insn0 = 0xc0040000;
3140 insn1 = 0x0000;
3141 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3142 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3143 }
3144 }
3145 continue;
3146
3147 default:
3148 break;
3149 }
3150
3151 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3152 because such sections are not SEC_ALLOC and thus ld.so will
3153 not process them. */
3154 if (unresolved_reloc
3155 && !((input_section->flags & SEC_DEBUGGING) != 0
3156 && h->def_dynamic)
3157 && _bfd_elf_section_offset (output_bfd, info, input_section,
3158 rel->r_offset) != (bfd_vma) -1)
3159 (*_bfd_error_handler)
3160 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3161 input_bfd,
3162 input_section,
3163 (long) rel->r_offset,
3164 howto->name,
3165 h->root.root.string);
3166
3167 do_relocation:
3168
3169 if (r_type == R_390_20
3170 || r_type == R_390_GOT20
3171 || r_type == R_390_GOTPLT20
3172 || r_type == R_390_TLS_GOTIE20)
3173 {
3174 relocation += rel->r_addend;
3175 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3176 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3177 contents, rel->r_offset,
3178 relocation, 0);
3179 }
3180 else
3181 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3182 contents, rel->r_offset,
3183 relocation, rel->r_addend);
3184
3185 if (r != bfd_reloc_ok)
3186 {
3187 const char *name;
3188
3189 if (h != NULL)
3190 name = h->root.root.string;
3191 else
3192 {
3193 name = bfd_elf_string_from_elf_section (input_bfd,
3194 symtab_hdr->sh_link,
3195 sym->st_name);
3196 if (name == NULL)
3197 return FALSE;
3198 if (*name == '\0')
3199 name = bfd_section_name (input_bfd, sec);
3200 }
3201
3202 if (r == bfd_reloc_overflow)
3203 {
3204
3205 if (! ((*info->callbacks->reloc_overflow)
3206 (info, (h ? &h->root : NULL), name, howto->name,
3207 (bfd_vma) 0, input_bfd, input_section,
3208 rel->r_offset)))
3209 return FALSE;
3210 }
3211 else
3212 {
3213 (*_bfd_error_handler)
3214 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3215 input_bfd, input_section,
3216 (long) rel->r_offset, name, (int) r);
3217 return FALSE;
3218 }
3219 }
3220 }
3221
3222 return TRUE;
3223 }
3224
3225 /* Generate the PLT slots together with the dynamic relocations needed
3226 for IFUNC symbols. */
3227
3228 static void
3229 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3230 struct bfd_link_info *info,
3231 struct elf_link_hash_entry *h,
3232 struct elf_s390_link_hash_table *htab,
3233 bfd_vma plt_offset,
3234 bfd_vma resolver_address)
3235 {
3236 bfd_vma plt_index;
3237 bfd_vma got_offset;
3238 Elf_Internal_Rela rela;
3239 bfd_byte *loc;
3240 asection *plt, *gotplt, *relplt;
3241
3242 if (htab->elf.iplt == NULL
3243 || htab->elf.igotplt == NULL
3244 || htab->elf.irelplt == NULL)
3245 abort ();
3246
3247 /* Index of the PLT slot within iplt section. */
3248 plt_index = plt_offset / PLT_ENTRY_SIZE;
3249 plt = htab->elf.iplt;
3250 /* Offset into the igot.plt section. */
3251 got_offset = plt_index * GOT_ENTRY_SIZE;
3252 gotplt = htab->elf.igotplt;
3253 relplt = htab->elf.irelplt;
3254
3255 /* Fill in the blueprint of a PLT. */
3256 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3257 PLT_ENTRY_SIZE);
3258
3259 /* Fixup the relative address to the GOT entry */
3260 bfd_put_32 (output_bfd,
3261 (gotplt->output_section->vma +
3262 gotplt->output_offset + got_offset
3263 - (plt->output_section->vma +
3264 plt->output_offset +
3265 plt_offset))/2,
3266 plt->contents + plt_offset + 2);
3267 /* Fixup the relative branch to PLT 0 */
3268 bfd_put_32 (output_bfd, - (plt->output_offset +
3269 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3270 plt->contents + plt_offset + 24);
3271 /* Fixup offset into .rela.plt section. */
3272 bfd_put_32 (output_bfd, relplt->output_offset +
3273 plt_index * sizeof (Elf64_External_Rela),
3274 plt->contents + plt_offset + 28);
3275
3276 /* Fill in the entry in the global offset table.
3277 Points to instruction after GOT offset. */
3278 bfd_put_64 (output_bfd,
3279 (plt->output_section->vma
3280 + plt->output_offset
3281 + plt_offset
3282 + 14),
3283 gotplt->contents + got_offset);
3284
3285 /* Fill in the entry in the .rela.plt section. */
3286 rela.r_offset = (gotplt->output_section->vma
3287 + gotplt->output_offset
3288 + got_offset);
3289
3290 if (!h
3291 || h->dynindx == -1
3292 || ((info->executable
3293 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3294 && h->def_regular))
3295 {
3296 /* The symbol can be locally resolved. */
3297 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3298 rela.r_addend = resolver_address;
3299 }
3300 else
3301 {
3302 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3303 rela.r_addend = 0;
3304 }
3305
3306 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3307 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3308 }
3309
3310
3311 /* Finish up dynamic symbol handling. We set the contents of various
3312 dynamic sections here. */
3313
3314 static bfd_boolean
3315 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3316 struct bfd_link_info *info,
3317 struct elf_link_hash_entry *h,
3318 Elf_Internal_Sym *sym)
3319 {
3320 struct elf_s390_link_hash_table *htab;
3321 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3322
3323 htab = elf_s390_hash_table (info);
3324 if (htab == NULL)
3325 return FALSE;
3326
3327 if (h->plt.offset != (bfd_vma) -1)
3328 {
3329 bfd_vma plt_index;
3330 bfd_vma got_offset;
3331 Elf_Internal_Rela rela;
3332 bfd_byte *loc;
3333
3334 /* This symbol has an entry in the procedure linkage table. Set
3335 it up. */
3336 if (s390_is_ifunc_symbol_p (h))
3337 {
3338 /* If we can resolve the IFUNC symbol locally we generate an
3339 IRELATIVE reloc. */
3340 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3341 eh->ifunc_resolver_address +
3342 eh->ifunc_resolver_section->output_offset +
3343 eh->ifunc_resolver_section->output_section->vma);
3344 ;
3345 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3346 symbols is below. */
3347 }
3348 else
3349 {
3350 if (h->dynindx == -1
3351 || htab->elf.splt == NULL
3352 || htab->elf.sgotplt == NULL
3353 || htab->elf.srelplt == NULL)
3354 abort ();
3355
3356 /* Calc. index no.
3357 Current offset - size first entry / entry size. */
3358 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3359
3360 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3361 addr & GOT addr. */
3362 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3363
3364 /* Fill in the blueprint of a PLT. */
3365 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3366 PLT_ENTRY_SIZE);
3367
3368 /* Fixup the relative address to the GOT entry */
3369 bfd_put_32 (output_bfd,
3370 (htab->elf.sgotplt->output_section->vma +
3371 htab->elf.sgotplt->output_offset + got_offset
3372 - (htab->elf.splt->output_section->vma +
3373 htab->elf.splt->output_offset +
3374 h->plt.offset))/2,
3375 htab->elf.splt->contents + h->plt.offset + 2);
3376 /* Fixup the relative branch to PLT 0 */
3377 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3378 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3379 htab->elf.splt->contents + h->plt.offset + 24);
3380 /* Fixup offset into .rela.plt section. */
3381 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3382 htab->elf.splt->contents + h->plt.offset + 28);
3383
3384 /* Fill in the entry in the global offset table.
3385 Points to instruction after GOT offset. */
3386 bfd_put_64 (output_bfd,
3387 (htab->elf.splt->output_section->vma
3388 + htab->elf.splt->output_offset
3389 + h->plt.offset
3390 + 14),
3391 htab->elf.sgotplt->contents + got_offset);
3392
3393 /* Fill in the entry in the .rela.plt section. */
3394 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3395 + htab->elf.sgotplt->output_offset
3396 + got_offset);
3397 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3398 rela.r_addend = 0;
3399 loc = htab->elf.srelplt->contents + plt_index *
3400 sizeof (Elf64_External_Rela);
3401 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3402
3403 if (!h->def_regular)
3404 {
3405 /* Mark the symbol as undefined, rather than as defined in
3406 the .plt section. Leave the value alone. This is a clue
3407 for the dynamic linker, to make function pointer
3408 comparisons work between an application and shared
3409 library. */
3410 sym->st_shndx = SHN_UNDEF;
3411 }
3412 }
3413 }
3414
3415 if (h->got.offset != (bfd_vma) -1
3416 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3417 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3418 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3419 {
3420 Elf_Internal_Rela rela;
3421 bfd_byte *loc;
3422
3423 /* This symbol has an entry in the global offset table. Set it
3424 up. */
3425 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3426 abort ();
3427
3428 rela.r_offset = (htab->elf.sgot->output_section->vma
3429 + htab->elf.sgot->output_offset
3430 + (h->got.offset &~ (bfd_vma) 1));
3431
3432 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3433 {
3434 if (info->shared)
3435 {
3436 /* An explicit GOT slot usage needs GLOB_DAT. If the
3437 symbol references local the implicit got.iplt slot
3438 will be used and the IRELATIVE reloc has been created
3439 above. */
3440 goto do_glob_dat;
3441 }
3442 else
3443 {
3444 /* For non-shared objects explicit GOT slots must be
3445 filled with the PLT slot address for pointer
3446 equality reasons. */
3447 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3448 + htab->elf.iplt->output_offset
3449 + h->plt.offset),
3450 htab->elf.sgot->contents + h->got.offset);
3451 return TRUE;
3452 }
3453 }
3454 else if (info->shared
3455 && SYMBOL_REFERENCES_LOCAL (info, h))
3456 {
3457 /* If this is a static link, or it is a -Bsymbolic link and
3458 the symbol is defined locally or was forced to be local
3459 because of a version file, we just want to emit a
3460 RELATIVE reloc. The entry in the global offset table
3461 will already have been initialized in the
3462 relocate_section function. */
3463 if (!h->def_regular)
3464 return FALSE;
3465 BFD_ASSERT((h->got.offset & 1) != 0);
3466 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3467 rela.r_addend = (h->root.u.def.value
3468 + h->root.u.def.section->output_section->vma
3469 + h->root.u.def.section->output_offset);
3470 }
3471 else
3472 {
3473 BFD_ASSERT((h->got.offset & 1) == 0);
3474 do_glob_dat:
3475 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3476 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3477 rela.r_addend = 0;
3478 }
3479
3480 loc = htab->elf.srelgot->contents;
3481 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3482 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3483 }
3484
3485 if (h->needs_copy)
3486 {
3487 Elf_Internal_Rela rela;
3488 bfd_byte *loc;
3489
3490 /* This symbols needs a copy reloc. Set it up. */
3491
3492 if (h->dynindx == -1
3493 || (h->root.type != bfd_link_hash_defined
3494 && h->root.type != bfd_link_hash_defweak)
3495 || htab->srelbss == NULL)
3496 abort ();
3497
3498 rela.r_offset = (h->root.u.def.value
3499 + h->root.u.def.section->output_section->vma
3500 + h->root.u.def.section->output_offset);
3501 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3502 rela.r_addend = 0;
3503 loc = htab->srelbss->contents;
3504 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3505 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3506 }
3507
3508 /* Mark some specially defined symbols as absolute. */
3509 if (strcmp (h->root.root.string, "_DYNAMIC") == 0
3510 || h == htab->elf.hgot
3511 || h == htab->elf.hplt)
3512 sym->st_shndx = SHN_ABS;
3513
3514 return TRUE;
3515 }
3516
3517 /* Used to decide how to sort relocs in an optimal manner for the
3518 dynamic linker, before writing them out. */
3519
3520 static enum elf_reloc_type_class
3521 elf_s390_reloc_type_class (const Elf_Internal_Rela *rela)
3522 {
3523 switch ((int) ELF64_R_TYPE (rela->r_info))
3524 {
3525 case R_390_RELATIVE:
3526 return reloc_class_relative;
3527 case R_390_JMP_SLOT:
3528 return reloc_class_plt;
3529 case R_390_COPY:
3530 return reloc_class_copy;
3531 default:
3532 return reloc_class_normal;
3533 }
3534 }
3535
3536 /* Finish up the dynamic sections. */
3537
3538 static bfd_boolean
3539 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3540 struct bfd_link_info *info)
3541 {
3542 struct elf_s390_link_hash_table *htab;
3543 bfd *dynobj;
3544 asection *sdyn;
3545 bfd *ibfd;
3546 unsigned int i;
3547
3548 htab = elf_s390_hash_table (info);
3549 if (htab == NULL)
3550 return FALSE;
3551
3552 dynobj = htab->elf.dynobj;
3553 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3554
3555 if (htab->elf.dynamic_sections_created)
3556 {
3557 Elf64_External_Dyn *dyncon, *dynconend;
3558
3559 if (sdyn == NULL || htab->elf.sgot == NULL)
3560 abort ();
3561
3562 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3563 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3564 for (; dyncon < dynconend; dyncon++)
3565 {
3566 Elf_Internal_Dyn dyn;
3567 asection *s;
3568
3569 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3570
3571 switch (dyn.d_tag)
3572 {
3573 default:
3574 continue;
3575
3576 case DT_PLTGOT:
3577 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3578 break;
3579
3580 case DT_JMPREL:
3581 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3582 break;
3583
3584 case DT_PLTRELSZ:
3585 s = htab->elf.srelplt->output_section;
3586 dyn.d_un.d_val = s->size;
3587 break;
3588
3589 case DT_RELASZ:
3590 /* The procedure linkage table relocs (DT_JMPREL) should
3591 not be included in the overall relocs (DT_RELA).
3592 Therefore, we override the DT_RELASZ entry here to
3593 make it not include the JMPREL relocs. Since the
3594 linker script arranges for .rela.plt to follow all
3595 other relocation sections, we don't have to worry
3596 about changing the DT_RELA entry. */
3597 s = htab->elf.srelplt->output_section;
3598 dyn.d_un.d_val -= s->size;
3599 break;
3600 }
3601
3602 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3603 }
3604
3605 /* Fill in the special first entry in the procedure linkage table. */
3606 if (htab->elf.splt && htab->elf.splt->size > 0)
3607 {
3608 /* fill in blueprint for plt 0 entry */
3609 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3610 PLT_FIRST_ENTRY_SIZE);
3611 /* Fixup relative address to start of GOT */
3612 bfd_put_32 (output_bfd,
3613 (htab->elf.sgotplt->output_section->vma +
3614 htab->elf.sgotplt->output_offset
3615 - htab->elf.splt->output_section->vma - 6)/2,
3616 htab->elf.splt->contents + 8);
3617 }
3618 elf_section_data (htab->elf.splt->output_section)
3619 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3620 }
3621
3622 if (htab->elf.sgotplt)
3623 {
3624 /* Fill in the first three entries in the global offset table. */
3625 if (htab->elf.sgotplt->size > 0)
3626 {
3627 bfd_put_64 (output_bfd,
3628 (sdyn == NULL ? (bfd_vma) 0
3629 : sdyn->output_section->vma + sdyn->output_offset),
3630 htab->elf.sgotplt->contents);
3631 /* One entry for shared object struct ptr. */
3632 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3633 /* One entry for _dl_runtime_resolve. */
3634 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3635 }
3636
3637 elf_section_data (htab->elf.sgot->output_section)
3638 ->this_hdr.sh_entsize = 8;
3639 }
3640
3641 /* Finish dynamic symbol for local IFUNC symbols. */
3642 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3643 {
3644 struct plt_entry *local_plt;
3645 Elf_Internal_Sym *isym;
3646 Elf_Internal_Shdr *symtab_hdr;
3647
3648 symtab_hdr = &elf_symtab_hdr (ibfd);
3649
3650 local_plt = elf_s390_local_plt (ibfd);
3651 if (local_plt != NULL)
3652 for (i = 0; i < symtab_hdr->sh_info; i++)
3653 {
3654 if (local_plt[i].plt.offset != (bfd_vma) -1)
3655 {
3656 asection *sec = local_plt[i].sec;
3657 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3658 if (isym == NULL)
3659 return FALSE;
3660
3661 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3662 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3663 local_plt[i].plt.offset,
3664 isym->st_value
3665 + sec->output_section->vma
3666 + sec->output_offset);
3667
3668 }
3669 }
3670 }
3671
3672 return TRUE;
3673 }
3674
3675 /* Return address for Ith PLT stub in section PLT, for relocation REL
3676 or (bfd_vma) -1 if it should not be included. */
3677
3678 static bfd_vma
3679 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3680 const arelent *rel ATTRIBUTE_UNUSED)
3681 {
3682 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3683 }
3684
3685 /* Why was the hash table entry size definition changed from
3686 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3687 this is the only reason for the s390_elf64_size_info structure. */
3688
3689 const struct elf_size_info s390_elf64_size_info =
3690 {
3691 sizeof (Elf64_External_Ehdr),
3692 sizeof (Elf64_External_Phdr),
3693 sizeof (Elf64_External_Shdr),
3694 sizeof (Elf64_External_Rel),
3695 sizeof (Elf64_External_Rela),
3696 sizeof (Elf64_External_Sym),
3697 sizeof (Elf64_External_Dyn),
3698 sizeof (Elf_External_Note),
3699 8, /* hash-table entry size. */
3700 1, /* internal relocations per external relocations. */
3701 64, /* arch_size. */
3702 3, /* log_file_align. */
3703 ELFCLASS64, EV_CURRENT,
3704 bfd_elf64_write_out_phdrs,
3705 bfd_elf64_write_shdrs_and_ehdr,
3706 bfd_elf64_checksum_contents,
3707 bfd_elf64_write_relocs,
3708 bfd_elf64_swap_symbol_in,
3709 bfd_elf64_swap_symbol_out,
3710 bfd_elf64_slurp_reloc_table,
3711 bfd_elf64_slurp_symbol_table,
3712 bfd_elf64_swap_dyn_in,
3713 bfd_elf64_swap_dyn_out,
3714 bfd_elf64_swap_reloc_in,
3715 bfd_elf64_swap_reloc_out,
3716 bfd_elf64_swap_reloca_in,
3717 bfd_elf64_swap_reloca_out
3718 };
3719
3720 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3721 #define TARGET_BIG_NAME "elf64-s390"
3722 #define ELF_ARCH bfd_arch_s390
3723 #define ELF_TARGET_ID S390_ELF_DATA
3724 #define ELF_MACHINE_CODE EM_S390
3725 #define ELF_MACHINE_ALT1 EM_S390_OLD
3726 #define ELF_MAXPAGESIZE 0x1000
3727
3728 #define elf_backend_size_info s390_elf64_size_info
3729
3730 #define elf_backend_can_gc_sections 1
3731 #define elf_backend_can_refcount 1
3732 #define elf_backend_want_got_plt 1
3733 #define elf_backend_plt_readonly 1
3734 #define elf_backend_want_plt_sym 0
3735 #define elf_backend_got_header_size 24
3736 #define elf_backend_rela_normal 1
3737
3738 #define elf_info_to_howto elf_s390_info_to_howto
3739
3740 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3741 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3742 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3743 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3744
3745 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3746 #define elf_backend_check_relocs elf_s390_check_relocs
3747 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3748 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3749 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3750 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3751 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3752 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3753 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3754 #define elf_backend_relocate_section elf_s390_relocate_section
3755 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3756 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3757 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3758 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3759 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3760
3761 #define bfd_elf64_mkobject elf_s390_mkobject
3762 #define elf_backend_object_p elf_s390_object_p
3763
3764 /* Enable ELF64 archive functions. */
3765 #define bfd_elf64_archive_functions
3766 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3767 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3768
3769 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3770 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3771 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3772 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3773 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3774 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3775 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3776 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3777 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3778
3779 #include "elf64-target.h"
GDB Binutils - Deliverables
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