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2012-09-03 Andreas Krebbel <Andreas.Krebbel@de.ibm.com>
[thirdparty/binutils-gdb.git] / bfd / elf64-s390.c
1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 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_PLTOFF16:
2310 case R_390_PLTOFF32:
2311 case R_390_PLTOFF64:
2312 relocation -= htab->elf.sgot->output_section->vma;
2313 break;
2314 case R_390_GOTPLT12:
2315 case R_390_GOTPLT16:
2316 case R_390_GOTPLT20:
2317 case R_390_GOTPLT32:
2318 case R_390_GOTPLT64:
2319 case R_390_GOTPLTENT:
2320 case R_390_GOT12:
2321 case R_390_GOT16:
2322 case R_390_GOT20:
2323 case R_390_GOT32:
2324 case R_390_GOT64:
2325 case R_390_GOTENT:
2326 {
2327 /* Write the PLT slot address into the GOT slot. */
2328 bfd_put_64 (output_bfd, relocation,
2329 htab->elf.sgot->contents +
2330 local_got_offsets[r_symndx]);
2331 relocation = (local_got_offsets[r_symndx] +
2332 htab->elf.sgot->output_offset);
2333
2334 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2335 relocation += htab->elf.sgot->output_section->vma;
2336 break;
2337 }
2338 default:
2339 break;
2340 }
2341 /* The output section is needed later in
2342 finish_dynamic_section when creating the dynamic
2343 relocation. */
2344 local_plt[r_symndx].sec = sec;
2345 goto do_relocation;
2346 }
2347 else
2348 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2349 }
2350 else
2351 {
2352 bfd_boolean warned ATTRIBUTE_UNUSED;
2353
2354 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2355 r_symndx, symtab_hdr, sym_hashes,
2356 h, sec, relocation,
2357 unresolved_reloc, warned);
2358 }
2359
2360 if (sec != NULL && discarded_section (sec))
2361 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2362 rel, 1, relend, howto, 0, contents);
2363
2364 if (info->relocatable)
2365 continue;
2366
2367 switch (r_type)
2368 {
2369 case R_390_GOTPLT12:
2370 case R_390_GOTPLT16:
2371 case R_390_GOTPLT20:
2372 case R_390_GOTPLT32:
2373 case R_390_GOTPLT64:
2374 case R_390_GOTPLTENT:
2375 /* There are three cases for a GOTPLT relocation. 1) The
2376 relocation is against the jump slot entry of a plt that
2377 will get emitted to the output file. 2) The relocation
2378 is against the jump slot of a plt entry that has been
2379 removed. elf_s390_adjust_gotplt has created a GOT entry
2380 as replacement. 3) The relocation is against a local symbol.
2381 Cases 2) and 3) are the same as the GOT relocation code
2382 so we just have to test for case 1 and fall through for
2383 the other two. */
2384 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2385 {
2386 bfd_vma plt_index;
2387
2388 if (s390_is_ifunc_symbol_p (h))
2389 {
2390 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2391 relocation = (plt_index * GOT_ENTRY_SIZE +
2392 htab->elf.igotplt->output_offset);
2393 if (r_type == R_390_GOTPLTENT)
2394 relocation += htab->elf.igotplt->output_section->vma;
2395 }
2396 else
2397 {
2398 /* Calc. index no.
2399 Current offset - size first entry / entry size. */
2400 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2401 PLT_ENTRY_SIZE;
2402
2403 /* Offset in GOT is PLT index plus GOT headers(3)
2404 times 4, addr & GOT addr. */
2405 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2406 if (r_type == R_390_GOTPLTENT)
2407 relocation += htab->elf.sgot->output_section->vma;
2408 }
2409 unresolved_reloc = FALSE;
2410 break;
2411 }
2412 /* Fall through. */
2413
2414 case R_390_GOT12:
2415 case R_390_GOT16:
2416 case R_390_GOT20:
2417 case R_390_GOT32:
2418 case R_390_GOT64:
2419 case R_390_GOTENT:
2420 /* Relocation is to the entry for this symbol in the global
2421 offset table. */
2422 if (base_got == NULL)
2423 abort ();
2424
2425 if (h != NULL)
2426 {
2427 bfd_boolean dyn;
2428
2429 off = h->got.offset;
2430 dyn = htab->elf.dynamic_sections_created;
2431
2432 if (s390_is_ifunc_symbol_p (h))
2433 {
2434 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2435 if (off == (bfd_vma)-1)
2436 {
2437 /* No explicit GOT usage so redirect to the
2438 got.iplt slot. */
2439 base_got = htab->elf.igotplt;
2440 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2441 }
2442 else
2443 {
2444 /* Explicit GOT slots must contain the address
2445 of the PLT slot. This will be handled in
2446 finish_dynamic_symbol. */
2447 }
2448 }
2449 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h)
2450 || (info->shared
2451 && SYMBOL_REFERENCES_LOCAL (info, h))
2452 || (ELF_ST_VISIBILITY (h->other)
2453 && h->root.type == bfd_link_hash_undefweak))
2454 {
2455 /* This is actually a static link, or it is a
2456 -Bsymbolic link and the symbol is defined
2457 locally, or the symbol was forced to be local
2458 because of a version file. We must initialize
2459 this entry in the global offset table. Since the
2460 offset must always be a multiple of 2, we use the
2461 least significant bit to record whether we have
2462 initialized it already.
2463
2464 When doing a dynamic link, we create a .rel.got
2465 relocation entry to initialize the value. This
2466 is done in the finish_dynamic_symbol routine. */
2467 if ((off & 1) != 0)
2468 off &= ~1;
2469 else
2470 {
2471 bfd_put_64 (output_bfd, relocation,
2472 base_got->contents + off);
2473 h->got.offset |= 1;
2474 }
2475 }
2476 else
2477 unresolved_reloc = FALSE;
2478 }
2479 else
2480 {
2481 if (local_got_offsets == NULL)
2482 abort ();
2483
2484 off = local_got_offsets[r_symndx];
2485
2486 /* The offset must always be a multiple of 8. We use
2487 the least significant bit to record whether we have
2488 already generated the necessary reloc. */
2489 if ((off & 1) != 0)
2490 off &= ~1;
2491 else
2492 {
2493 bfd_put_64 (output_bfd, relocation,
2494 htab->elf.sgot->contents + off);
2495
2496 if (info->shared)
2497 {
2498 asection *s;
2499 Elf_Internal_Rela outrel;
2500 bfd_byte *loc;
2501
2502 s = htab->elf.srelgot;
2503 if (s == NULL)
2504 abort ();
2505
2506 outrel.r_offset = (htab->elf.sgot->output_section->vma
2507 + htab->elf.sgot->output_offset
2508 + off);
2509 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2510 outrel.r_addend = relocation;
2511 loc = s->contents;
2512 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2513 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2514 }
2515
2516 local_got_offsets[r_symndx] |= 1;
2517 }
2518 }
2519
2520 if (off >= (bfd_vma) -2)
2521 abort ();
2522
2523 relocation = base_got->output_offset + off;
2524
2525 /* For @GOTENT the relocation is against the offset between
2526 the instruction and the symbols entry in the GOT and not
2527 between the start of the GOT and the symbols entry. We
2528 add the vma of the GOT to get the correct value. */
2529 if ( r_type == R_390_GOTENT
2530 || r_type == R_390_GOTPLTENT)
2531 relocation += base_got->output_section->vma;
2532
2533 break;
2534
2535 case R_390_GOTOFF16:
2536 case R_390_GOTOFF32:
2537 case R_390_GOTOFF64:
2538 /* Relocation is relative to the start of the global offset
2539 table. */
2540
2541 /* Note that sgot->output_offset is not involved in this
2542 calculation. We always want the start of .got. If we
2543 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2544 permitted by the ABI, we might have to change this
2545 calculation. */
2546 relocation -= htab->elf.sgot->output_section->vma;
2547 break;
2548
2549 case R_390_GOTPC:
2550 case R_390_GOTPCDBL:
2551 /* Use global offset table as symbol value. */
2552 relocation = htab->elf.sgot->output_section->vma;
2553 unresolved_reloc = FALSE;
2554 break;
2555
2556 case R_390_PLT16DBL:
2557 case R_390_PLT32:
2558 case R_390_PLT32DBL:
2559 case R_390_PLT64:
2560 /* Relocation is to the entry for this symbol in the
2561 procedure linkage table. */
2562
2563 /* Resolve a PLT32 reloc against a local symbol directly,
2564 without using the procedure linkage table. */
2565 if (h == NULL)
2566 break;
2567
2568 if (h->plt.offset == (bfd_vma) -1
2569 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2570 {
2571 /* We didn't make a PLT entry for this symbol. This
2572 happens when statically linking PIC code, or when
2573 using -Bsymbolic. */
2574 break;
2575 }
2576 if (s390_is_ifunc_symbol_p (h))
2577 relocation = (htab->elf.iplt->output_section->vma
2578 + htab->elf.iplt->output_offset
2579 + h->plt.offset);
2580 else
2581 relocation = (htab->elf.splt->output_section->vma
2582 + htab->elf.splt->output_offset
2583 + h->plt.offset);
2584 unresolved_reloc = FALSE;
2585 break;
2586
2587 case R_390_PLTOFF16:
2588 case R_390_PLTOFF32:
2589 case R_390_PLTOFF64:
2590 /* Relocation is to the entry for this symbol in the
2591 procedure linkage table relative to the start of the GOT. */
2592
2593 /* For local symbols or if we didn't make a PLT entry for
2594 this symbol resolve the symbol directly. */
2595 if (h == NULL
2596 || h->plt.offset == (bfd_vma) -1
2597 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2598 {
2599 relocation -= htab->elf.sgot->output_section->vma;
2600 break;
2601 }
2602
2603 if (s390_is_ifunc_symbol_p (h))
2604 relocation = (htab->elf.iplt->output_section->vma
2605 + htab->elf.iplt->output_offset
2606 + h->plt.offset
2607 - htab->elf.sgot->output_section->vma);
2608 else
2609 relocation = (htab->elf.splt->output_section->vma
2610 + htab->elf.splt->output_offset
2611 + h->plt.offset
2612 - htab->elf.sgot->output_section->vma);
2613 unresolved_reloc = FALSE;
2614 break;
2615
2616 case R_390_8:
2617 case R_390_16:
2618 case R_390_32:
2619 case R_390_64:
2620 case R_390_PC16:
2621 case R_390_PC16DBL:
2622 case R_390_PC32:
2623 case R_390_PC32DBL:
2624 case R_390_PC64:
2625
2626 if (h != NULL
2627 && s390_is_ifunc_symbol_p (h)
2628 && h->def_regular)
2629 {
2630 if (!info->shared || !h->non_got_ref)
2631 {
2632 /* For a non-shared object STT_GNU_IFUNC symbol must
2633 go through PLT. */
2634 relocation = (htab->elf.iplt->output_section->vma
2635 + htab->elf.iplt->output_offset
2636 + h ->plt.offset);
2637 goto do_relocation;
2638 }
2639 else
2640 {
2641 /* For shared objects a runtime relocation is needed. */
2642
2643 Elf_Internal_Rela outrel;
2644 asection *sreloc;
2645
2646 /* Need a dynamic relocation to get the real function
2647 address. */
2648 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2649 info,
2650 input_section,
2651 rel->r_offset);
2652 if (outrel.r_offset == (bfd_vma) -1
2653 || outrel.r_offset == (bfd_vma) -2)
2654 abort ();
2655
2656 outrel.r_offset += (input_section->output_section->vma
2657 + input_section->output_offset);
2658
2659 if (h->dynindx == -1
2660 || h->forced_local
2661 || info->executable)
2662 {
2663 /* This symbol is resolved locally. */
2664 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2665 outrel.r_addend = (h->root.u.def.value
2666 + h->root.u.def.section->output_section->vma
2667 + h->root.u.def.section->output_offset);
2668 }
2669 else
2670 {
2671 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2672 outrel.r_addend = 0;
2673 }
2674
2675 sreloc = htab->elf.irelifunc;
2676 elf_append_rela (output_bfd, sreloc, &outrel);
2677
2678 /* If this reloc is against an external symbol, we
2679 do not want to fiddle with the addend. Otherwise,
2680 we need to include the symbol value so that it
2681 becomes an addend for the dynamic reloc. For an
2682 internal symbol, we have updated addend. */
2683 continue;
2684 }
2685 }
2686
2687 if ((input_section->flags & SEC_ALLOC) == 0)
2688 break;
2689
2690 if ((info->shared
2691 && (h == NULL
2692 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2693 || h->root.type != bfd_link_hash_undefweak)
2694 && ((r_type != R_390_PC16
2695 && r_type != R_390_PC16DBL
2696 && r_type != R_390_PC32
2697 && r_type != R_390_PC32DBL
2698 && r_type != R_390_PC64)
2699 || !SYMBOL_CALLS_LOCAL (info, h)))
2700 || (ELIMINATE_COPY_RELOCS
2701 && !info->shared
2702 && h != NULL
2703 && h->dynindx != -1
2704 && !h->non_got_ref
2705 && ((h->def_dynamic
2706 && !h->def_regular)
2707 || h->root.type == bfd_link_hash_undefweak
2708 || h->root.type == bfd_link_hash_undefined)))
2709 {
2710 Elf_Internal_Rela outrel;
2711 bfd_boolean skip, relocate;
2712 asection *sreloc;
2713 bfd_byte *loc;
2714
2715 /* When generating a shared object, these relocations
2716 are copied into the output file to be resolved at run
2717 time. */
2718 skip = FALSE;
2719 relocate = FALSE;
2720
2721 outrel.r_offset =
2722 _bfd_elf_section_offset (output_bfd, info, input_section,
2723 rel->r_offset);
2724 if (outrel.r_offset == (bfd_vma) -1)
2725 skip = TRUE;
2726 else if (outrel.r_offset == (bfd_vma) -2)
2727 skip = TRUE, relocate = TRUE;
2728
2729 outrel.r_offset += (input_section->output_section->vma
2730 + input_section->output_offset);
2731
2732 if (skip)
2733 memset (&outrel, 0, sizeof outrel);
2734 else if (h != NULL
2735 && h->dynindx != -1
2736 && (r_type == R_390_PC16
2737 || r_type == R_390_PC16DBL
2738 || r_type == R_390_PC32
2739 || r_type == R_390_PC32DBL
2740 || r_type == R_390_PC64
2741 || !info->shared
2742 || !SYMBOLIC_BIND (info, h)
2743 || !h->def_regular))
2744 {
2745 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2746 outrel.r_addend = rel->r_addend;
2747 }
2748 else
2749 {
2750 /* This symbol is local, or marked to become local. */
2751 outrel.r_addend = relocation + rel->r_addend;
2752 if (r_type == R_390_64)
2753 {
2754 relocate = TRUE;
2755 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2756 }
2757 else
2758 {
2759 long sindx;
2760
2761 if (bfd_is_abs_section (sec))
2762 sindx = 0;
2763 else if (sec == NULL || sec->owner == NULL)
2764 {
2765 bfd_set_error(bfd_error_bad_value);
2766 return FALSE;
2767 }
2768 else
2769 {
2770 asection *osec;
2771
2772 osec = sec->output_section;
2773 sindx = elf_section_data (osec)->dynindx;
2774
2775 if (sindx == 0)
2776 {
2777 osec = htab->elf.text_index_section;
2778 sindx = elf_section_data (osec)->dynindx;
2779 }
2780 BFD_ASSERT (sindx != 0);
2781
2782 /* We are turning this relocation into one
2783 against a section symbol, so subtract out
2784 the output section's address but not the
2785 offset of the input section in the output
2786 section. */
2787 outrel.r_addend -= osec->vma;
2788 }
2789 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2790 }
2791 }
2792
2793 sreloc = elf_section_data (input_section)->sreloc;
2794 if (sreloc == NULL)
2795 abort ();
2796
2797 loc = sreloc->contents;
2798 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2799 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2800
2801 /* If this reloc is against an external symbol, we do
2802 not want to fiddle with the addend. Otherwise, we
2803 need to include the symbol value so that it becomes
2804 an addend for the dynamic reloc. */
2805 if (! relocate)
2806 continue;
2807 }
2808
2809 break;
2810
2811 /* Relocations for tls literal pool entries. */
2812 case R_390_TLS_IE64:
2813 if (info->shared)
2814 {
2815 Elf_Internal_Rela outrel;
2816 asection *sreloc;
2817 bfd_byte *loc;
2818
2819 outrel.r_offset = rel->r_offset
2820 + input_section->output_section->vma
2821 + input_section->output_offset;
2822 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2823 sreloc = elf_section_data (input_section)->sreloc;
2824 if (sreloc == NULL)
2825 abort ();
2826 loc = sreloc->contents;
2827 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2828 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2829 }
2830 /* Fall through. */
2831
2832 case R_390_TLS_GD64:
2833 case R_390_TLS_GOTIE64:
2834 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2835 tls_type = GOT_UNKNOWN;
2836 if (h == NULL && local_got_offsets)
2837 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2838 else if (h != NULL)
2839 {
2840 tls_type = elf_s390_hash_entry(h)->tls_type;
2841 if (!info->shared && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2842 r_type = R_390_TLS_LE64;
2843 }
2844 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2845 r_type = R_390_TLS_IE64;
2846
2847 if (r_type == R_390_TLS_LE64)
2848 {
2849 /* This relocation gets optimized away by the local exec
2850 access optimization. */
2851 BFD_ASSERT (! unresolved_reloc);
2852 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2853 contents + rel->r_offset);
2854 continue;
2855 }
2856
2857 if (htab->elf.sgot == NULL)
2858 abort ();
2859
2860 if (h != NULL)
2861 off = h->got.offset;
2862 else
2863 {
2864 if (local_got_offsets == NULL)
2865 abort ();
2866
2867 off = local_got_offsets[r_symndx];
2868 }
2869
2870 emit_tls_relocs:
2871
2872 if ((off & 1) != 0)
2873 off &= ~1;
2874 else
2875 {
2876 Elf_Internal_Rela outrel;
2877 bfd_byte *loc;
2878 int dr_type, indx;
2879
2880 if (htab->elf.srelgot == NULL)
2881 abort ();
2882
2883 outrel.r_offset = (htab->elf.sgot->output_section->vma
2884 + htab->elf.sgot->output_offset + off);
2885
2886 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2887 if (r_type == R_390_TLS_GD64)
2888 dr_type = R_390_TLS_DTPMOD;
2889 else
2890 dr_type = R_390_TLS_TPOFF;
2891 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2892 outrel.r_addend = relocation - dtpoff_base (info);
2893 else
2894 outrel.r_addend = 0;
2895 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2896 loc = htab->elf.srelgot->contents;
2897 loc += htab->elf.srelgot->reloc_count++
2898 * sizeof (Elf64_External_Rela);
2899 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2900
2901 if (r_type == R_390_TLS_GD64)
2902 {
2903 if (indx == 0)
2904 {
2905 BFD_ASSERT (! unresolved_reloc);
2906 bfd_put_64 (output_bfd,
2907 relocation - dtpoff_base (info),
2908 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2909 }
2910 else
2911 {
2912 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2913 outrel.r_offset += GOT_ENTRY_SIZE;
2914 outrel.r_addend = 0;
2915 htab->elf.srelgot->reloc_count++;
2916 loc += sizeof (Elf64_External_Rela);
2917 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2918 }
2919 }
2920
2921 if (h != NULL)
2922 h->got.offset |= 1;
2923 else
2924 local_got_offsets[r_symndx] |= 1;
2925 }
2926
2927 if (off >= (bfd_vma) -2)
2928 abort ();
2929 if (r_type == ELF64_R_TYPE (rel->r_info))
2930 {
2931 relocation = htab->elf.sgot->output_offset + off;
2932 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2933 relocation += htab->elf.sgot->output_section->vma;
2934 unresolved_reloc = FALSE;
2935 }
2936 else
2937 {
2938 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2939 contents + rel->r_offset);
2940 continue;
2941 }
2942 break;
2943
2944 case R_390_TLS_GOTIE12:
2945 case R_390_TLS_GOTIE20:
2946 case R_390_TLS_IEENT:
2947 if (h == NULL)
2948 {
2949 if (local_got_offsets == NULL)
2950 abort();
2951 off = local_got_offsets[r_symndx];
2952 if (info->shared)
2953 goto emit_tls_relocs;
2954 }
2955 else
2956 {
2957 off = h->got.offset;
2958 tls_type = elf_s390_hash_entry(h)->tls_type;
2959 if (info->shared || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2960 goto emit_tls_relocs;
2961 }
2962
2963 if (htab->elf.sgot == NULL)
2964 abort ();
2965
2966 BFD_ASSERT (! unresolved_reloc);
2967 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2968 htab->elf.sgot->contents + off);
2969 relocation = htab->elf.sgot->output_offset + off;
2970 if (r_type == R_390_TLS_IEENT)
2971 relocation += htab->elf.sgot->output_section->vma;
2972 unresolved_reloc = FALSE;
2973 break;
2974
2975 case R_390_TLS_LDM64:
2976 if (! info->shared)
2977 /* The literal pool entry this relocation refers to gets ignored
2978 by the optimized code of the local exec model. Do nothing
2979 and the value will turn out zero. */
2980 continue;
2981
2982 if (htab->elf.sgot == NULL)
2983 abort ();
2984
2985 off = htab->tls_ldm_got.offset;
2986 if (off & 1)
2987 off &= ~1;
2988 else
2989 {
2990 Elf_Internal_Rela outrel;
2991 bfd_byte *loc;
2992
2993 if (htab->elf.srelgot == NULL)
2994 abort ();
2995
2996 outrel.r_offset = (htab->elf.sgot->output_section->vma
2997 + htab->elf.sgot->output_offset + off);
2998
2999 bfd_put_64 (output_bfd, 0,
3000 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3001 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3002 outrel.r_addend = 0;
3003 loc = htab->elf.srelgot->contents;
3004 loc += htab->elf.srelgot->reloc_count++
3005 * sizeof (Elf64_External_Rela);
3006 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3007 htab->tls_ldm_got.offset |= 1;
3008 }
3009 relocation = htab->elf.sgot->output_offset + off;
3010 unresolved_reloc = FALSE;
3011 break;
3012
3013 case R_390_TLS_LE64:
3014 if (info->shared)
3015 {
3016 /* Linking a shared library with non-fpic code requires
3017 a R_390_TLS_TPOFF relocation. */
3018 Elf_Internal_Rela outrel;
3019 asection *sreloc;
3020 bfd_byte *loc;
3021 int indx;
3022
3023 outrel.r_offset = rel->r_offset
3024 + input_section->output_section->vma
3025 + input_section->output_offset;
3026 if (h != NULL && h->dynindx != -1)
3027 indx = h->dynindx;
3028 else
3029 indx = 0;
3030 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3031 if (indx == 0)
3032 outrel.r_addend = relocation - dtpoff_base (info);
3033 else
3034 outrel.r_addend = 0;
3035 sreloc = elf_section_data (input_section)->sreloc;
3036 if (sreloc == NULL)
3037 abort ();
3038 loc = sreloc->contents;
3039 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3040 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3041 }
3042 else
3043 {
3044 BFD_ASSERT (! unresolved_reloc);
3045 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3046 contents + rel->r_offset);
3047 }
3048 continue;
3049
3050 case R_390_TLS_LDO64:
3051 if (info->shared || (input_section->flags & SEC_DEBUGGING))
3052 relocation -= dtpoff_base (info);
3053 else
3054 /* When converting LDO to LE, we must negate. */
3055 relocation = -tpoff (info, relocation);
3056 break;
3057
3058 /* Relocations for tls instructions. */
3059 case R_390_TLS_LOAD:
3060 case R_390_TLS_GDCALL:
3061 case R_390_TLS_LDCALL:
3062 tls_type = GOT_UNKNOWN;
3063 if (h == NULL && local_got_offsets)
3064 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3065 else if (h != NULL)
3066 tls_type = elf_s390_hash_entry(h)->tls_type;
3067
3068 if (tls_type == GOT_TLS_GD)
3069 continue;
3070
3071 if (r_type == R_390_TLS_LOAD)
3072 {
3073 if (!info->shared && (h == NULL || h->dynindx == -1))
3074 {
3075 /* IE->LE transition. Four valid cases:
3076 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3077 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3078 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3079 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3080 unsigned int insn0, insn1, ry;
3081
3082 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3083 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3084 if (insn1 != 0x0004)
3085 invalid_tls_insn (input_bfd, input_section, rel);
3086 ry = 0;
3087 if ((insn0 & 0xff00f000) == 0xe3000000)
3088 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3089 ry = (insn0 & 0x000f0000);
3090 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3091 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3092 ry = (insn0 & 0x0000f000) << 4;
3093 else if ((insn0 & 0xff00f000) == 0xe300c000)
3094 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3095 ry = (insn0 & 0x000f0000);
3096 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3097 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3098 ry = (insn0 & 0x0000f000) << 4;
3099 else
3100 invalid_tls_insn (input_bfd, input_section, rel);
3101 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3102 insn1 = 0x000d;
3103 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3104 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3105 }
3106 }
3107 else if (r_type == R_390_TLS_GDCALL)
3108 {
3109 unsigned int insn0, insn1;
3110
3111 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3112 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3113 if ((insn0 & 0xffff0000) != 0xc0e50000)
3114 invalid_tls_insn (input_bfd, input_section, rel);
3115 if (!info->shared && (h == NULL || h->dynindx == -1))
3116 {
3117 /* GD->LE transition.
3118 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3119 insn0 = 0xc0040000;
3120 insn1 = 0x0000;
3121 }
3122 else
3123 {
3124 /* GD->IE transition.
3125 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3126 insn0 = 0xe322c000;
3127 insn1 = 0x0004;
3128 }
3129 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3130 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3131 }
3132 else if (r_type == R_390_TLS_LDCALL)
3133 {
3134 if (!info->shared)
3135 {
3136 unsigned int insn0, insn1;
3137
3138 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3139 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3140 if ((insn0 & 0xffff0000) != 0xc0e50000)
3141 invalid_tls_insn (input_bfd, input_section, rel);
3142 /* LD->LE transition.
3143 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3144 insn0 = 0xc0040000;
3145 insn1 = 0x0000;
3146 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3147 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3148 }
3149 }
3150 continue;
3151
3152 default:
3153 break;
3154 }
3155
3156 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3157 because such sections are not SEC_ALLOC and thus ld.so will
3158 not process them. */
3159 if (unresolved_reloc
3160 && !((input_section->flags & SEC_DEBUGGING) != 0
3161 && h->def_dynamic)
3162 && _bfd_elf_section_offset (output_bfd, info, input_section,
3163 rel->r_offset) != (bfd_vma) -1)
3164 (*_bfd_error_handler)
3165 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3166 input_bfd,
3167 input_section,
3168 (long) rel->r_offset,
3169 howto->name,
3170 h->root.root.string);
3171
3172 do_relocation:
3173
3174 if (r_type == R_390_20
3175 || r_type == R_390_GOT20
3176 || r_type == R_390_GOTPLT20
3177 || r_type == R_390_TLS_GOTIE20)
3178 {
3179 relocation += rel->r_addend;
3180 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3181 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3182 contents, rel->r_offset,
3183 relocation, 0);
3184 }
3185 else
3186 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3187 contents, rel->r_offset,
3188 relocation, rel->r_addend);
3189
3190 if (r != bfd_reloc_ok)
3191 {
3192 const char *name;
3193
3194 if (h != NULL)
3195 name = h->root.root.string;
3196 else
3197 {
3198 name = bfd_elf_string_from_elf_section (input_bfd,
3199 symtab_hdr->sh_link,
3200 sym->st_name);
3201 if (name == NULL)
3202 return FALSE;
3203 if (*name == '\0')
3204 name = bfd_section_name (input_bfd, sec);
3205 }
3206
3207 if (r == bfd_reloc_overflow)
3208 {
3209
3210 if (! ((*info->callbacks->reloc_overflow)
3211 (info, (h ? &h->root : NULL), name, howto->name,
3212 (bfd_vma) 0, input_bfd, input_section,
3213 rel->r_offset)))
3214 return FALSE;
3215 }
3216 else
3217 {
3218 (*_bfd_error_handler)
3219 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3220 input_bfd, input_section,
3221 (long) rel->r_offset, name, (int) r);
3222 return FALSE;
3223 }
3224 }
3225 }
3226
3227 return TRUE;
3228 }
3229
3230 /* Generate the PLT slots together with the dynamic relocations needed
3231 for IFUNC symbols. */
3232
3233 static void
3234 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3235 struct bfd_link_info *info,
3236 struct elf_link_hash_entry *h,
3237 struct elf_s390_link_hash_table *htab,
3238 bfd_vma plt_offset,
3239 bfd_vma resolver_address)
3240 {
3241 bfd_vma plt_index;
3242 bfd_vma got_offset;
3243 Elf_Internal_Rela rela;
3244 bfd_byte *loc;
3245 asection *plt, *gotplt, *relplt;
3246
3247 if (htab->elf.iplt == NULL
3248 || htab->elf.igotplt == NULL
3249 || htab->elf.irelplt == NULL)
3250 abort ();
3251
3252 /* Index of the PLT slot within iplt section. */
3253 plt_index = plt_offset / PLT_ENTRY_SIZE;
3254 plt = htab->elf.iplt;
3255 /* Offset into the igot.plt section. */
3256 got_offset = plt_index * GOT_ENTRY_SIZE;
3257 gotplt = htab->elf.igotplt;
3258 relplt = htab->elf.irelplt;
3259
3260 /* Fill in the blueprint of a PLT. */
3261 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3262 PLT_ENTRY_SIZE);
3263
3264 /* Fixup the relative address to the GOT entry */
3265 bfd_put_32 (output_bfd,
3266 (gotplt->output_section->vma +
3267 gotplt->output_offset + got_offset
3268 - (plt->output_section->vma +
3269 plt->output_offset +
3270 plt_offset))/2,
3271 plt->contents + plt_offset + 2);
3272 /* Fixup the relative branch to PLT 0 */
3273 bfd_put_32 (output_bfd, - (plt->output_offset +
3274 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3275 plt->contents + plt_offset + 24);
3276 /* Fixup offset into .rela.plt section. */
3277 bfd_put_32 (output_bfd, relplt->output_offset +
3278 plt_index * sizeof (Elf64_External_Rela),
3279 plt->contents + plt_offset + 28);
3280
3281 /* Fill in the entry in the global offset table.
3282 Points to instruction after GOT offset. */
3283 bfd_put_64 (output_bfd,
3284 (plt->output_section->vma
3285 + plt->output_offset
3286 + plt_offset
3287 + 14),
3288 gotplt->contents + got_offset);
3289
3290 /* Fill in the entry in the .rela.plt section. */
3291 rela.r_offset = (gotplt->output_section->vma
3292 + gotplt->output_offset
3293 + got_offset);
3294
3295 if (!h
3296 || h->dynindx == -1
3297 || ((info->executable
3298 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3299 && h->def_regular))
3300 {
3301 /* The symbol can be locally resolved. */
3302 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3303 rela.r_addend = resolver_address;
3304 }
3305 else
3306 {
3307 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3308 rela.r_addend = 0;
3309 }
3310
3311 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3312 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3313 }
3314
3315
3316 /* Finish up dynamic symbol handling. We set the contents of various
3317 dynamic sections here. */
3318
3319 static bfd_boolean
3320 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3321 struct bfd_link_info *info,
3322 struct elf_link_hash_entry *h,
3323 Elf_Internal_Sym *sym)
3324 {
3325 struct elf_s390_link_hash_table *htab;
3326 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3327
3328 htab = elf_s390_hash_table (info);
3329 if (htab == NULL)
3330 return FALSE;
3331
3332 if (h->plt.offset != (bfd_vma) -1)
3333 {
3334 bfd_vma plt_index;
3335 bfd_vma got_offset;
3336 Elf_Internal_Rela rela;
3337 bfd_byte *loc;
3338
3339 /* This symbol has an entry in the procedure linkage table. Set
3340 it up. */
3341 if (s390_is_ifunc_symbol_p (h))
3342 {
3343 /* If we can resolve the IFUNC symbol locally we generate an
3344 IRELATIVE reloc. */
3345 elf_s390_finish_ifunc_symbol (output_bfd, info, h, htab, h->plt.offset,
3346 eh->ifunc_resolver_address +
3347 eh->ifunc_resolver_section->output_offset +
3348 eh->ifunc_resolver_section->output_section->vma);
3349 ;
3350 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3351 symbols is below. */
3352 }
3353 else
3354 {
3355 if (h->dynindx == -1
3356 || htab->elf.splt == NULL
3357 || htab->elf.sgotplt == NULL
3358 || htab->elf.srelplt == NULL)
3359 abort ();
3360
3361 /* Calc. index no.
3362 Current offset - size first entry / entry size. */
3363 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3364
3365 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3366 addr & GOT addr. */
3367 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3368
3369 /* Fill in the blueprint of a PLT. */
3370 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3371 PLT_ENTRY_SIZE);
3372
3373 /* Fixup the relative address to the GOT entry */
3374 bfd_put_32 (output_bfd,
3375 (htab->elf.sgotplt->output_section->vma +
3376 htab->elf.sgotplt->output_offset + got_offset
3377 - (htab->elf.splt->output_section->vma +
3378 htab->elf.splt->output_offset +
3379 h->plt.offset))/2,
3380 htab->elf.splt->contents + h->plt.offset + 2);
3381 /* Fixup the relative branch to PLT 0 */
3382 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3383 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3384 htab->elf.splt->contents + h->plt.offset + 24);
3385 /* Fixup offset into .rela.plt section. */
3386 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3387 htab->elf.splt->contents + h->plt.offset + 28);
3388
3389 /* Fill in the entry in the global offset table.
3390 Points to instruction after GOT offset. */
3391 bfd_put_64 (output_bfd,
3392 (htab->elf.splt->output_section->vma
3393 + htab->elf.splt->output_offset
3394 + h->plt.offset
3395 + 14),
3396 htab->elf.sgotplt->contents + got_offset);
3397
3398 /* Fill in the entry in the .rela.plt section. */
3399 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3400 + htab->elf.sgotplt->output_offset
3401 + got_offset);
3402 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3403 rela.r_addend = 0;
3404 loc = htab->elf.srelplt->contents + plt_index *
3405 sizeof (Elf64_External_Rela);
3406 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3407
3408 if (!h->def_regular)
3409 {
3410 /* Mark the symbol as undefined, rather than as defined in
3411 the .plt section. Leave the value alone. This is a clue
3412 for the dynamic linker, to make function pointer
3413 comparisons work between an application and shared
3414 library. */
3415 sym->st_shndx = SHN_UNDEF;
3416 }
3417 }
3418 }
3419
3420 if (h->got.offset != (bfd_vma) -1
3421 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3422 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3423 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3424 {
3425 Elf_Internal_Rela rela;
3426 bfd_byte *loc;
3427
3428 /* This symbol has an entry in the global offset table. Set it
3429 up. */
3430 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3431 abort ();
3432
3433 rela.r_offset = (htab->elf.sgot->output_section->vma
3434 + htab->elf.sgot->output_offset
3435 + (h->got.offset &~ (bfd_vma) 1));
3436
3437 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3438 {
3439 if (info->shared)
3440 {
3441 /* An explicit GOT slot usage needs GLOB_DAT. If the
3442 symbol references local the implicit got.iplt slot
3443 will be used and the IRELATIVE reloc has been created
3444 above. */
3445 goto do_glob_dat;
3446 }
3447 else
3448 {
3449 /* For non-shared objects explicit GOT slots must be
3450 filled with the PLT slot address for pointer
3451 equality reasons. */
3452 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3453 + htab->elf.iplt->output_offset
3454 + h->plt.offset),
3455 htab->elf.sgot->contents + h->got.offset);
3456 return TRUE;
3457 }
3458 }
3459 else if (info->shared
3460 && SYMBOL_REFERENCES_LOCAL (info, h))
3461 {
3462 /* If this is a static link, or it is a -Bsymbolic link and
3463 the symbol is defined locally or was forced to be local
3464 because of a version file, we just want to emit a
3465 RELATIVE reloc. The entry in the global offset table
3466 will already have been initialized in the
3467 relocate_section function. */
3468 if (!h->def_regular)
3469 return FALSE;
3470 BFD_ASSERT((h->got.offset & 1) != 0);
3471 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3472 rela.r_addend = (h->root.u.def.value
3473 + h->root.u.def.section->output_section->vma
3474 + h->root.u.def.section->output_offset);
3475 }
3476 else
3477 {
3478 BFD_ASSERT((h->got.offset & 1) == 0);
3479 do_glob_dat:
3480 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3481 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3482 rela.r_addend = 0;
3483 }
3484
3485 loc = htab->elf.srelgot->contents;
3486 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3487 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3488 }
3489
3490 if (h->needs_copy)
3491 {
3492 Elf_Internal_Rela rela;
3493 bfd_byte *loc;
3494
3495 /* This symbols needs a copy reloc. Set it up. */
3496
3497 if (h->dynindx == -1
3498 || (h->root.type != bfd_link_hash_defined
3499 && h->root.type != bfd_link_hash_defweak)
3500 || htab->srelbss == NULL)
3501 abort ();
3502
3503 rela.r_offset = (h->root.u.def.value
3504 + h->root.u.def.section->output_section->vma
3505 + h->root.u.def.section->output_offset);
3506 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3507 rela.r_addend = 0;
3508 loc = htab->srelbss->contents;
3509 loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela);
3510 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3511 }
3512
3513 /* Mark some specially defined symbols as absolute. */
3514 if (h == htab->elf.hdynamic
3515 || h == htab->elf.hgot
3516 || h == htab->elf.hplt)
3517 sym->st_shndx = SHN_ABS;
3518
3519 return TRUE;
3520 }
3521
3522 /* Used to decide how to sort relocs in an optimal manner for the
3523 dynamic linker, before writing them out. */
3524
3525 static enum elf_reloc_type_class
3526 elf_s390_reloc_type_class (const Elf_Internal_Rela *rela)
3527 {
3528 switch ((int) ELF64_R_TYPE (rela->r_info))
3529 {
3530 case R_390_RELATIVE:
3531 return reloc_class_relative;
3532 case R_390_JMP_SLOT:
3533 return reloc_class_plt;
3534 case R_390_COPY:
3535 return reloc_class_copy;
3536 default:
3537 return reloc_class_normal;
3538 }
3539 }
3540
3541 /* Finish up the dynamic sections. */
3542
3543 static bfd_boolean
3544 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3545 struct bfd_link_info *info)
3546 {
3547 struct elf_s390_link_hash_table *htab;
3548 bfd *dynobj;
3549 asection *sdyn;
3550 bfd *ibfd;
3551 unsigned int i;
3552
3553 htab = elf_s390_hash_table (info);
3554 if (htab == NULL)
3555 return FALSE;
3556
3557 dynobj = htab->elf.dynobj;
3558 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3559
3560 if (htab->elf.dynamic_sections_created)
3561 {
3562 Elf64_External_Dyn *dyncon, *dynconend;
3563
3564 if (sdyn == NULL || htab->elf.sgot == NULL)
3565 abort ();
3566
3567 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3568 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3569 for (; dyncon < dynconend; dyncon++)
3570 {
3571 Elf_Internal_Dyn dyn;
3572 asection *s;
3573
3574 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3575
3576 switch (dyn.d_tag)
3577 {
3578 default:
3579 continue;
3580
3581 case DT_PLTGOT:
3582 dyn.d_un.d_ptr = htab->elf.sgot->output_section->vma;
3583 break;
3584
3585 case DT_JMPREL:
3586 dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma;
3587 break;
3588
3589 case DT_PLTRELSZ:
3590 s = htab->elf.srelplt->output_section;
3591 dyn.d_un.d_val = s->size;
3592 break;
3593
3594 case DT_RELASZ:
3595 /* The procedure linkage table relocs (DT_JMPREL) should
3596 not be included in the overall relocs (DT_RELA).
3597 Therefore, we override the DT_RELASZ entry here to
3598 make it not include the JMPREL relocs. Since the
3599 linker script arranges for .rela.plt to follow all
3600 other relocation sections, we don't have to worry
3601 about changing the DT_RELA entry. */
3602 s = htab->elf.srelplt->output_section;
3603 dyn.d_un.d_val -= s->size;
3604 break;
3605 }
3606
3607 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3608 }
3609
3610 /* Fill in the special first entry in the procedure linkage table. */
3611 if (htab->elf.splt && htab->elf.splt->size > 0)
3612 {
3613 /* fill in blueprint for plt 0 entry */
3614 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3615 PLT_FIRST_ENTRY_SIZE);
3616 /* Fixup relative address to start of GOT */
3617 bfd_put_32 (output_bfd,
3618 (htab->elf.sgotplt->output_section->vma +
3619 htab->elf.sgotplt->output_offset
3620 - htab->elf.splt->output_section->vma - 6)/2,
3621 htab->elf.splt->contents + 8);
3622 }
3623 elf_section_data (htab->elf.splt->output_section)
3624 ->this_hdr.sh_entsize = PLT_ENTRY_SIZE;
3625 }
3626
3627 if (htab->elf.sgotplt)
3628 {
3629 /* Fill in the first three entries in the global offset table. */
3630 if (htab->elf.sgotplt->size > 0)
3631 {
3632 bfd_put_64 (output_bfd,
3633 (sdyn == NULL ? (bfd_vma) 0
3634 : sdyn->output_section->vma + sdyn->output_offset),
3635 htab->elf.sgotplt->contents);
3636 /* One entry for shared object struct ptr. */
3637 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3638 /* One entry for _dl_runtime_resolve. */
3639 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 12);
3640 }
3641
3642 elf_section_data (htab->elf.sgot->output_section)
3643 ->this_hdr.sh_entsize = 8;
3644 }
3645
3646 /* Finish dynamic symbol for local IFUNC symbols. */
3647 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next)
3648 {
3649 struct plt_entry *local_plt;
3650 Elf_Internal_Sym *isym;
3651 Elf_Internal_Shdr *symtab_hdr;
3652
3653 symtab_hdr = &elf_symtab_hdr (ibfd);
3654
3655 local_plt = elf_s390_local_plt (ibfd);
3656 if (local_plt != NULL)
3657 for (i = 0; i < symtab_hdr->sh_info; i++)
3658 {
3659 if (local_plt[i].plt.offset != (bfd_vma) -1)
3660 {
3661 asection *sec = local_plt[i].sec;
3662 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3663 if (isym == NULL)
3664 return FALSE;
3665
3666 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3667 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3668 local_plt[i].plt.offset,
3669 isym->st_value
3670 + sec->output_section->vma
3671 + sec->output_offset);
3672
3673 }
3674 }
3675 }
3676
3677 return TRUE;
3678 }
3679
3680 /* Return address for Ith PLT stub in section PLT, for relocation REL
3681 or (bfd_vma) -1 if it should not be included. */
3682
3683 static bfd_vma
3684 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3685 const arelent *rel ATTRIBUTE_UNUSED)
3686 {
3687 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3688 }
3689
3690 /* Why was the hash table entry size definition changed from
3691 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3692 this is the only reason for the s390_elf64_size_info structure. */
3693
3694 const struct elf_size_info s390_elf64_size_info =
3695 {
3696 sizeof (Elf64_External_Ehdr),
3697 sizeof (Elf64_External_Phdr),
3698 sizeof (Elf64_External_Shdr),
3699 sizeof (Elf64_External_Rel),
3700 sizeof (Elf64_External_Rela),
3701 sizeof (Elf64_External_Sym),
3702 sizeof (Elf64_External_Dyn),
3703 sizeof (Elf_External_Note),
3704 8, /* hash-table entry size. */
3705 1, /* internal relocations per external relocations. */
3706 64, /* arch_size. */
3707 3, /* log_file_align. */
3708 ELFCLASS64, EV_CURRENT,
3709 bfd_elf64_write_out_phdrs,
3710 bfd_elf64_write_shdrs_and_ehdr,
3711 bfd_elf64_checksum_contents,
3712 bfd_elf64_write_relocs,
3713 bfd_elf64_swap_symbol_in,
3714 bfd_elf64_swap_symbol_out,
3715 bfd_elf64_slurp_reloc_table,
3716 bfd_elf64_slurp_symbol_table,
3717 bfd_elf64_swap_dyn_in,
3718 bfd_elf64_swap_dyn_out,
3719 bfd_elf64_swap_reloc_in,
3720 bfd_elf64_swap_reloc_out,
3721 bfd_elf64_swap_reloca_in,
3722 bfd_elf64_swap_reloca_out
3723 };
3724
3725 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3726 #define TARGET_BIG_NAME "elf64-s390"
3727 #define ELF_ARCH bfd_arch_s390
3728 #define ELF_TARGET_ID S390_ELF_DATA
3729 #define ELF_MACHINE_CODE EM_S390
3730 #define ELF_MACHINE_ALT1 EM_S390_OLD
3731 #define ELF_MAXPAGESIZE 0x1000
3732
3733 #define elf_backend_size_info s390_elf64_size_info
3734
3735 #define elf_backend_can_gc_sections 1
3736 #define elf_backend_can_refcount 1
3737 #define elf_backend_want_got_plt 1
3738 #define elf_backend_plt_readonly 1
3739 #define elf_backend_want_plt_sym 0
3740 #define elf_backend_got_header_size 24
3741 #define elf_backend_rela_normal 1
3742
3743 #define elf_info_to_howto elf_s390_info_to_howto
3744
3745 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3746 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3747 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3748 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3749
3750 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3751 #define elf_backend_check_relocs elf_s390_check_relocs
3752 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3753 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3754 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3755 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3756 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3757 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3758 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3759 #define elf_backend_relocate_section elf_s390_relocate_section
3760 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3761 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3762 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3763 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3764 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3765
3766 #define bfd_elf64_mkobject elf_s390_mkobject
3767 #define elf_backend_object_p elf_s390_object_p
3768
3769 /* Enable ELF64 archive functions. */
3770 #define bfd_elf64_archive_functions
3771 extern bfd_boolean bfd_elf64_archive_slurp_armap (bfd *);
3772 extern bfd_boolean bfd_elf64_archive_write_armap (bfd *, unsigned int, struct orl *, unsigned int, int);
3773
3774 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3775 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3776 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3777 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3778 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3779 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3780 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3781 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3782 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3783
3784 #include "elf64-target.h"
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