1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2018 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
37 asection *, bfd *, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
40 asection *, bfd *, char **);
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table[] =
45 HOWTO (R_390_NONE, /* type */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
49 FALSE, /* pc_relative */
51 complain_overflow_dont, /* complain_on_overflow */
52 bfd_elf_generic_reloc, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE, /* partial_inplace */
57 FALSE), /* pcrel_offset */
59 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
60 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
61 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
62 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
63 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
64 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
65 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
66 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
67 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
68 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
69 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
70 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
71 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
72 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
73 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
74 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
75 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
76 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
77 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
78 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
79 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
80 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
81 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
82 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
83 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
84 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
85 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
86 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
87 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
88 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
89 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
90 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
91 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
92 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
93 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
94 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
95 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
96 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
97 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
98 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
99 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
100 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
101 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
102 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
103 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
104 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
105 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
106 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
107 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
108 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
109 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
110 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
111 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
112 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
113 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
114 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
115 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
116 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
117 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
118 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
119 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
120 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
121 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
122 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
123 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
124 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
125 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
126 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
127 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
128 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
129 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
130 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
131 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
132 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
133 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
134 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
135 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
136 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
137 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
139 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
140 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
141 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
144 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
145 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
147 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
148 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
150 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
151 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
152 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
153 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
155 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
156 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
158 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
159 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
160 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
161 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
162 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
163 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
164 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
165 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
166 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
167 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
168 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
169 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
170 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
171 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
172 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
173 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
174 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
175 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
176 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
177 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
178 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
179 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
180 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
181 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
182 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto =
187 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
188 static reloc_howto_type elf64_s390_vtentry_howto =
189 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);
191 static reloc_howto_type *
192 elf_s390_reloc_type_lookup (bfd *abfd,
193 bfd_reloc_code_real_type code)
198 return &elf_howto_table[(int) R_390_NONE];
200 return &elf_howto_table[(int) R_390_8];
201 case BFD_RELOC_390_12:
202 return &elf_howto_table[(int) R_390_12];
204 return &elf_howto_table[(int) R_390_16];
206 return &elf_howto_table[(int) R_390_32];
208 return &elf_howto_table[(int) R_390_32];
209 case BFD_RELOC_32_PCREL:
210 return &elf_howto_table[(int) R_390_PC32];
211 case BFD_RELOC_390_GOT12:
212 return &elf_howto_table[(int) R_390_GOT12];
213 case BFD_RELOC_32_GOT_PCREL:
214 return &elf_howto_table[(int) R_390_GOT32];
215 case BFD_RELOC_390_PLT32:
216 return &elf_howto_table[(int) R_390_PLT32];
217 case BFD_RELOC_390_COPY:
218 return &elf_howto_table[(int) R_390_COPY];
219 case BFD_RELOC_390_GLOB_DAT:
220 return &elf_howto_table[(int) R_390_GLOB_DAT];
221 case BFD_RELOC_390_JMP_SLOT:
222 return &elf_howto_table[(int) R_390_JMP_SLOT];
223 case BFD_RELOC_390_RELATIVE:
224 return &elf_howto_table[(int) R_390_RELATIVE];
225 case BFD_RELOC_32_GOTOFF:
226 return &elf_howto_table[(int) R_390_GOTOFF32];
227 case BFD_RELOC_390_GOTPC:
228 return &elf_howto_table[(int) R_390_GOTPC];
229 case BFD_RELOC_390_GOT16:
230 return &elf_howto_table[(int) R_390_GOT16];
231 case BFD_RELOC_16_PCREL:
232 return &elf_howto_table[(int) R_390_PC16];
233 case BFD_RELOC_390_PC12DBL:
234 return &elf_howto_table[(int) R_390_PC12DBL];
235 case BFD_RELOC_390_PLT12DBL:
236 return &elf_howto_table[(int) R_390_PLT12DBL];
237 case BFD_RELOC_390_PC16DBL:
238 return &elf_howto_table[(int) R_390_PC16DBL];
239 case BFD_RELOC_390_PLT16DBL:
240 return &elf_howto_table[(int) R_390_PLT16DBL];
241 case BFD_RELOC_390_PC24DBL:
242 return &elf_howto_table[(int) R_390_PC24DBL];
243 case BFD_RELOC_390_PLT24DBL:
244 return &elf_howto_table[(int) R_390_PLT24DBL];
245 case BFD_RELOC_390_PC32DBL:
246 return &elf_howto_table[(int) R_390_PC32DBL];
247 case BFD_RELOC_390_PLT32DBL:
248 return &elf_howto_table[(int) R_390_PLT32DBL];
249 case BFD_RELOC_390_GOTPCDBL:
250 return &elf_howto_table[(int) R_390_GOTPCDBL];
252 return &elf_howto_table[(int) R_390_64];
253 case BFD_RELOC_64_PCREL:
254 return &elf_howto_table[(int) R_390_PC64];
255 case BFD_RELOC_390_GOT64:
256 return &elf_howto_table[(int) R_390_GOT64];
257 case BFD_RELOC_390_PLT64:
258 return &elf_howto_table[(int) R_390_PLT64];
259 case BFD_RELOC_390_GOTENT:
260 return &elf_howto_table[(int) R_390_GOTENT];
261 case BFD_RELOC_16_GOTOFF:
262 return &elf_howto_table[(int) R_390_GOTOFF16];
263 case BFD_RELOC_390_GOTOFF64:
264 return &elf_howto_table[(int) R_390_GOTOFF64];
265 case BFD_RELOC_390_GOTPLT12:
266 return &elf_howto_table[(int) R_390_GOTPLT12];
267 case BFD_RELOC_390_GOTPLT16:
268 return &elf_howto_table[(int) R_390_GOTPLT16];
269 case BFD_RELOC_390_GOTPLT32:
270 return &elf_howto_table[(int) R_390_GOTPLT32];
271 case BFD_RELOC_390_GOTPLT64:
272 return &elf_howto_table[(int) R_390_GOTPLT64];
273 case BFD_RELOC_390_GOTPLTENT:
274 return &elf_howto_table[(int) R_390_GOTPLTENT];
275 case BFD_RELOC_390_PLTOFF16:
276 return &elf_howto_table[(int) R_390_PLTOFF16];
277 case BFD_RELOC_390_PLTOFF32:
278 return &elf_howto_table[(int) R_390_PLTOFF32];
279 case BFD_RELOC_390_PLTOFF64:
280 return &elf_howto_table[(int) R_390_PLTOFF64];
281 case BFD_RELOC_390_TLS_LOAD:
282 return &elf_howto_table[(int) R_390_TLS_LOAD];
283 case BFD_RELOC_390_TLS_GDCALL:
284 return &elf_howto_table[(int) R_390_TLS_GDCALL];
285 case BFD_RELOC_390_TLS_LDCALL:
286 return &elf_howto_table[(int) R_390_TLS_LDCALL];
287 case BFD_RELOC_390_TLS_GD64:
288 return &elf_howto_table[(int) R_390_TLS_GD64];
289 case BFD_RELOC_390_TLS_GOTIE12:
290 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
291 case BFD_RELOC_390_TLS_GOTIE64:
292 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
293 case BFD_RELOC_390_TLS_LDM64:
294 return &elf_howto_table[(int) R_390_TLS_LDM64];
295 case BFD_RELOC_390_TLS_IE64:
296 return &elf_howto_table[(int) R_390_TLS_IE64];
297 case BFD_RELOC_390_TLS_IEENT:
298 return &elf_howto_table[(int) R_390_TLS_IEENT];
299 case BFD_RELOC_390_TLS_LE64:
300 return &elf_howto_table[(int) R_390_TLS_LE64];
301 case BFD_RELOC_390_TLS_LDO64:
302 return &elf_howto_table[(int) R_390_TLS_LDO64];
303 case BFD_RELOC_390_TLS_DTPMOD:
304 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
305 case BFD_RELOC_390_TLS_DTPOFF:
306 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
307 case BFD_RELOC_390_TLS_TPOFF:
308 return &elf_howto_table[(int) R_390_TLS_TPOFF];
309 case BFD_RELOC_390_20:
310 return &elf_howto_table[(int) R_390_20];
311 case BFD_RELOC_390_GOT20:
312 return &elf_howto_table[(int) R_390_GOT20];
313 case BFD_RELOC_390_GOTPLT20:
314 return &elf_howto_table[(int) R_390_GOTPLT20];
315 case BFD_RELOC_390_TLS_GOTIE20:
316 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
317 case BFD_RELOC_390_IRELATIVE:
318 return &elf_howto_table[(int) R_390_IRELATIVE];
319 case BFD_RELOC_VTABLE_INHERIT:
320 return &elf64_s390_vtinherit_howto;
321 case BFD_RELOC_VTABLE_ENTRY:
322 return &elf64_s390_vtentry_howto;
327 /* xgettext:c-format */
328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd, (int) code);
329 bfd_set_error (bfd_error_bad_value);
333 static reloc_howto_type *
334 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
340 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
342 if (elf_howto_table[i].name != NULL
343 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
344 return &elf_howto_table[i];
346 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
347 return &elf64_s390_vtinherit_howto;
348 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
349 return &elf64_s390_vtentry_howto;
354 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
358 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
360 Elf_Internal_Rela *dst)
362 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
366 case R_390_GNU_VTINHERIT:
367 cache_ptr->howto = &elf64_s390_vtinherit_howto;
370 case R_390_GNU_VTENTRY:
371 cache_ptr->howto = &elf64_s390_vtentry_howto;
375 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
377 /* xgettext:c-format */
378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
380 bfd_set_error (bfd_error_bad_value);
383 cache_ptr->howto = &elf_howto_table[r_type];
388 /* A relocation function which doesn't do anything. */
389 static bfd_reloc_status_type
390 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
391 arelent *reloc_entry,
392 asymbol *symbol ATTRIBUTE_UNUSED,
393 void * data ATTRIBUTE_UNUSED,
394 asection *input_section,
396 char **error_message ATTRIBUTE_UNUSED)
399 reloc_entry->address += input_section->output_offset;
403 /* Handle the large displacement relocs. */
404 static bfd_reloc_status_type
405 s390_elf_ldisp_reloc (bfd *abfd,
406 arelent *reloc_entry,
409 asection *input_section,
411 char **error_message ATTRIBUTE_UNUSED)
413 reloc_howto_type *howto = reloc_entry->howto;
417 if (output_bfd != (bfd *) NULL
418 && (symbol->flags & BSF_SECTION_SYM) == 0
419 && (! howto->partial_inplace
420 || reloc_entry->addend == 0))
422 reloc_entry->address += input_section->output_offset;
425 if (output_bfd != NULL)
426 return bfd_reloc_continue;
428 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
429 return bfd_reloc_outofrange;
431 relocation = (symbol->value
432 + symbol->section->output_section->vma
433 + symbol->section->output_offset);
434 relocation += reloc_entry->addend;
435 if (howto->pc_relative)
437 relocation -= (input_section->output_section->vma
438 + input_section->output_offset);
439 relocation -= reloc_entry->address;
442 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
443 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
444 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
446 if ((bfd_signed_vma) relocation < - 0x80000
447 || (bfd_signed_vma) relocation > 0x7ffff)
448 return bfd_reloc_overflow;
454 elf_s390_is_local_label_name (bfd *abfd, const char *name)
456 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
459 return _bfd_elf_is_local_label_name (abfd, name);
462 /* Functions for the 390 ELF linker. */
464 /* The name of the dynamic interpreter. This is put in the .interp
467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
473 #define ELIMINATE_COPY_RELOCS 1
475 /* The size in bytes of the first entry in the procedure linkage table. */
476 #define PLT_FIRST_ENTRY_SIZE 32
477 /* The size in bytes of an entry in the procedure linkage table. */
478 #define PLT_ENTRY_SIZE 32
480 #define GOT_ENTRY_SIZE 8
482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
484 /* The first three entries in a procedure linkage table are reserved,
485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
489 /* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
494 Furthermore, only r 0 and 1 are free to use!!! */
496 /* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
501 The code for PLT entries looks like this:
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
507 The loader must then find the module where the function is
508 and insert the address in the GOT.
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
515 BRCL 15,-x # 6 bytes Jump to start of PLT
516 .long ? # 4 bytes offset into .rela.plt
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
521 Fixup at offset 28: 32 bit offset into .rela.plt
523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
529 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
540 /* The first PLT entry pushes the offset into the symbol table
541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
544 /* The first entry in the PLT:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
553 Fixup at offset 8: relative address to start of GOT. */
555 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
568 /* s390 ELF linker hash entry. */
570 struct elf_s390_link_hash_entry
572 struct elf_link_hash_entry elf;
574 /* Track dynamic relocs copied for this symbol. */
575 struct elf_dyn_relocs *dyn_relocs;
577 /* Number of GOTPLT references for a function. */
578 bfd_signed_vma gotplt_refcount;
580 #define GOT_UNKNOWN 0
584 #define GOT_TLS_IE_NLT 3
585 unsigned char tls_type;
587 /* For pointer equality reasons we might need to change the symbol
588 type from STT_GNU_IFUNC to STT_FUNC together with its value and
589 section entry. So after alloc_dynrelocs only these values should
590 be used. In order to check whether a symbol is IFUNC use
591 s390_is_ifunc_symbol_p. */
592 bfd_vma ifunc_resolver_address;
593 asection *ifunc_resolver_section;
596 #define elf_s390_hash_entry(ent) \
597 ((struct elf_s390_link_hash_entry *)(ent))
599 /* This structure represents an entry in the local PLT list needed for
600 local IFUNC symbols. */
603 /* The section of the local symbol.
604 Set in relocate_section and used in finish_dynamic_sections. */
609 bfd_signed_vma refcount;
614 /* NOTE: Keep this structure in sync with
615 the one declared in elf32-s390.c. */
616 struct elf_s390_obj_tdata
618 struct elf_obj_tdata root;
620 /* A local PLT is needed for ifunc symbols. */
621 struct plt_entry *local_plt;
623 /* TLS type for each local got entry. */
624 char *local_got_tls_type;
627 #define elf_s390_tdata(abfd) \
628 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
630 #define elf_s390_local_plt(abfd) \
631 (elf_s390_tdata (abfd)->local_plt)
633 #define elf_s390_local_got_tls_type(abfd) \
634 (elf_s390_tdata (abfd)->local_got_tls_type)
636 #define is_s390_elf(bfd) \
637 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
638 && elf_tdata (bfd) != NULL \
639 && elf_object_id (bfd) == S390_ELF_DATA)
642 elf_s390_mkobject (bfd *abfd)
644 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
649 elf_s390_object_p (bfd *abfd)
651 /* Set the right machine number for an s390 elf32 file. */
652 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
655 /* s390 ELF linker hash table. */
657 struct elf_s390_link_hash_table
659 struct elf_link_hash_table elf;
661 /* Short-cuts to get to dynamic linker sections. */
665 bfd_signed_vma refcount;
669 /* Small local sym cache. */
670 struct sym_cache sym_cache;
672 /* Options passed from the linker. */
673 struct s390_elf_params *params;
676 /* Get the s390 ELF linker hash table from a link_info structure. */
678 #define elf_s390_hash_table(p) \
679 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
680 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
683 #include "elf-s390-common.c"
685 /* Create an entry in an s390 ELF linker hash table. */
687 static struct bfd_hash_entry *
688 link_hash_newfunc (struct bfd_hash_entry *entry,
689 struct bfd_hash_table *table,
692 /* Allocate the structure if it has not already been allocated by a
696 entry = bfd_hash_allocate (table,
697 sizeof (struct elf_s390_link_hash_entry));
702 /* Call the allocation method of the superclass. */
703 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
706 struct elf_s390_link_hash_entry *eh;
708 eh = (struct elf_s390_link_hash_entry *) entry;
709 eh->dyn_relocs = NULL;
710 eh->gotplt_refcount = 0;
711 eh->tls_type = GOT_UNKNOWN;
712 eh->ifunc_resolver_address = 0;
713 eh->ifunc_resolver_section = NULL;
719 /* Create an s390 ELF linker hash table. */
721 static struct bfd_link_hash_table *
722 elf_s390_link_hash_table_create (bfd *abfd)
724 struct elf_s390_link_hash_table *ret;
725 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
727 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
731 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
732 sizeof (struct elf_s390_link_hash_entry),
739 return &ret->elf.root;
742 /* Copy the extra info we tack onto an elf_link_hash_entry. */
745 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
746 struct elf_link_hash_entry *dir,
747 struct elf_link_hash_entry *ind)
749 struct elf_s390_link_hash_entry *edir, *eind;
751 edir = (struct elf_s390_link_hash_entry *) dir;
752 eind = (struct elf_s390_link_hash_entry *) ind;
754 if (eind->dyn_relocs != NULL)
756 if (edir->dyn_relocs != NULL)
758 struct elf_dyn_relocs **pp;
759 struct elf_dyn_relocs *p;
761 /* Add reloc counts against the indirect sym to the direct sym
762 list. Merge any entries against the same section. */
763 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
765 struct elf_dyn_relocs *q;
767 for (q = edir->dyn_relocs; q != NULL; q = q->next)
768 if (q->sec == p->sec)
770 q->pc_count += p->pc_count;
771 q->count += p->count;
778 *pp = edir->dyn_relocs;
781 edir->dyn_relocs = eind->dyn_relocs;
782 eind->dyn_relocs = NULL;
785 if (ind->root.type == bfd_link_hash_indirect
786 && dir->got.refcount <= 0)
788 edir->tls_type = eind->tls_type;
789 eind->tls_type = GOT_UNKNOWN;
792 if (ELIMINATE_COPY_RELOCS
793 && ind->root.type != bfd_link_hash_indirect
794 && dir->dynamic_adjusted)
796 /* If called to transfer flags for a weakdef during processing
797 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
798 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
799 if (dir->versioned != versioned_hidden)
800 dir->ref_dynamic |= ind->ref_dynamic;
801 dir->ref_regular |= ind->ref_regular;
802 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
803 dir->needs_plt |= ind->needs_plt;
806 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
810 elf_s390_tls_transition (struct bfd_link_info *info,
814 if (bfd_link_pic (info))
822 return R_390_TLS_LE64;
823 return R_390_TLS_IE64;
824 case R_390_TLS_GOTIE64:
826 return R_390_TLS_LE64;
827 return R_390_TLS_GOTIE64;
828 case R_390_TLS_LDM64:
829 return R_390_TLS_LE64;
835 /* Look through the relocs for a section during the first phase, and
836 allocate space in the global offset table or procedure linkage
840 elf_s390_check_relocs (bfd *abfd,
841 struct bfd_link_info *info,
843 const Elf_Internal_Rela *relocs)
845 struct elf_s390_link_hash_table *htab;
846 Elf_Internal_Shdr *symtab_hdr;
847 struct elf_link_hash_entry **sym_hashes;
848 const Elf_Internal_Rela *rel;
849 const Elf_Internal_Rela *rel_end;
851 bfd_signed_vma *local_got_refcounts;
852 int tls_type, old_tls_type;
854 if (bfd_link_relocatable (info))
857 BFD_ASSERT (is_s390_elf (abfd));
859 htab = elf_s390_hash_table (info);
863 symtab_hdr = &elf_symtab_hdr (abfd);
864 sym_hashes = elf_sym_hashes (abfd);
865 local_got_refcounts = elf_local_got_refcounts (abfd);
869 rel_end = relocs + sec->reloc_count;
870 for (rel = relocs; rel < rel_end; rel++)
873 unsigned int r_symndx;
874 struct elf_link_hash_entry *h;
875 Elf_Internal_Sym *isym;
877 r_symndx = ELF64_R_SYM (rel->r_info);
879 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
881 /* xgettext:c-format */
882 _bfd_error_handler (_("%pB: bad symbol index: %d"),
887 if (r_symndx < symtab_hdr->sh_info)
889 /* A local symbol. */
890 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
895 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
897 struct plt_entry *plt;
899 if (htab->elf.dynobj == NULL)
900 htab->elf.dynobj = abfd;
902 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
905 if (local_got_refcounts == NULL)
907 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
909 local_got_refcounts = elf_local_got_refcounts (abfd);
911 plt = elf_s390_local_plt (abfd);
912 plt[r_symndx].plt.refcount++;
918 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
919 while (h->root.type == bfd_link_hash_indirect
920 || h->root.type == bfd_link_hash_warning)
921 h = (struct elf_link_hash_entry *) h->root.u.i.link;
924 /* Create got section and local_got_refcounts array if they
926 r_type = elf_s390_tls_transition (info,
927 ELF64_R_TYPE (rel->r_info),
942 case R_390_GOTPLTENT:
944 case R_390_TLS_GOTIE12:
945 case R_390_TLS_GOTIE20:
946 case R_390_TLS_GOTIE64:
947 case R_390_TLS_IEENT:
949 case R_390_TLS_LDM64:
951 && local_got_refcounts == NULL)
953 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
955 local_got_refcounts = elf_local_got_refcounts (abfd);
964 if (htab->elf.sgot == NULL)
966 if (htab->elf.dynobj == NULL)
967 htab->elf.dynobj = abfd;
968 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
975 if (htab->elf.dynobj == NULL)
976 htab->elf.dynobj = abfd;
977 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
980 /* Make sure an IFUNC symbol defined in a non-shared object
981 always gets a PLT slot. */
982 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
984 /* The symbol is called by the dynamic loader in order
985 to resolve the relocation. So it is in fact also
996 /* These relocs do not need a GOT slot. They just load the
997 GOT pointer itself or address something else relative to
998 the GOT. Since the GOT pointer has been set up above we
1001 case R_390_GOTOFF16:
1002 case R_390_GOTOFF32:
1003 case R_390_GOTOFF64:
1004 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1008 case R_390_PLT12DBL:
1009 case R_390_PLT16DBL:
1010 case R_390_PLT24DBL:
1012 case R_390_PLT32DBL:
1014 case R_390_PLTOFF16:
1015 case R_390_PLTOFF32:
1016 case R_390_PLTOFF64:
1017 /* This symbol requires a procedure linkage table entry. We
1018 actually build the entry in adjust_dynamic_symbol,
1019 because this might be a case of linking PIC code which is
1020 never referenced by a dynamic object, in which case we
1021 don't need to generate a procedure linkage table entry
1024 /* If this is a local symbol, we resolve it directly without
1025 creating a procedure linkage table entry. */
1029 h->plt.refcount += 1;
1033 case R_390_GOTPLT12:
1034 case R_390_GOTPLT16:
1035 case R_390_GOTPLT20:
1036 case R_390_GOTPLT32:
1037 case R_390_GOTPLT64:
1038 case R_390_GOTPLTENT:
1039 /* This symbol requires either a procedure linkage table entry
1040 or an entry in the local got. We actually build the entry
1041 in adjust_dynamic_symbol because whether this is really a
1042 global reference can change and with it the fact if we have
1043 to create a plt entry or a local got entry. To be able to
1044 make a once global symbol a local one we have to keep track
1045 of the number of gotplt references that exist for this
1049 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1051 h->plt.refcount += 1;
1054 local_got_refcounts[r_symndx] += 1;
1057 case R_390_TLS_LDM64:
1058 htab->tls_ldm_got.refcount += 1;
1061 case R_390_TLS_IE64:
1062 case R_390_TLS_GOTIE12:
1063 case R_390_TLS_GOTIE20:
1064 case R_390_TLS_GOTIE64:
1065 case R_390_TLS_IEENT:
1066 if (bfd_link_pic (info))
1067 info->flags |= DF_STATIC_TLS;
1076 case R_390_TLS_GD64:
1077 /* This symbol requires a global offset table entry. */
1086 tls_type = GOT_NORMAL;
1088 case R_390_TLS_GD64:
1089 tls_type = GOT_TLS_GD;
1091 case R_390_TLS_IE64:
1092 case R_390_TLS_GOTIE64:
1093 tls_type = GOT_TLS_IE;
1095 case R_390_TLS_GOTIE12:
1096 case R_390_TLS_GOTIE20:
1097 case R_390_TLS_IEENT:
1098 tls_type = GOT_TLS_IE_NLT;
1104 h->got.refcount += 1;
1105 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1109 local_got_refcounts[r_symndx] += 1;
1110 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1112 /* If a TLS symbol is accessed using IE at least once,
1113 there is no point to use dynamic model for it. */
1114 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1116 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1119 /* xgettext:c-format */
1120 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1121 abfd, h->root.root.string);
1124 if (old_tls_type > tls_type)
1125 tls_type = old_tls_type;
1128 if (old_tls_type != tls_type)
1131 elf_s390_hash_entry (h)->tls_type = tls_type;
1133 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1136 if (r_type != R_390_TLS_IE64)
1140 case R_390_TLS_LE64:
1141 /* For static linking and executables this reloc will be
1142 calculated at linktime otherwise a TLS_TPOFF runtime
1143 reloc will be generated. */
1144 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1147 if (!bfd_link_pic (info))
1149 info->flags |= DF_STATIC_TLS;
1163 if (h != NULL && bfd_link_executable (info))
1165 /* If this reloc is in a read-only section, we might
1166 need a copy reloc. We can't check reliably at this
1167 stage whether the section is read-only, as input
1168 sections have not yet been mapped to output sections.
1169 Tentatively set the flag for now, and correct in
1170 adjust_dynamic_symbol. */
1173 if (!bfd_link_pic (info))
1175 /* We may need a .plt entry if the function this reloc
1176 refers to is in a shared lib. */
1177 h->plt.refcount += 1;
1181 /* If we are creating a shared library, and this is a reloc
1182 against a global symbol, or a non PC relative reloc
1183 against a local symbol, then we need to copy the reloc
1184 into the shared library. However, if we are linking with
1185 -Bsymbolic, we do not need to copy a reloc against a
1186 global symbol which is defined in an object we are
1187 including in the link (i.e., DEF_REGULAR is set). At
1188 this point we have not seen all the input files, so it is
1189 possible that DEF_REGULAR is not set now but will be set
1190 later (it is never cleared). In case of a weak definition,
1191 DEF_REGULAR may be cleared later by a strong definition in
1192 a shared library. We account for that possibility below by
1193 storing information in the relocs_copied field of the hash
1194 table entry. A similar situation occurs when creating
1195 shared libraries and symbol visibility changes render the
1198 If on the other hand, we are creating an executable, we
1199 may need to keep relocations for symbols satisfied by a
1200 dynamic library if we manage to avoid copy relocs for the
1202 if ((bfd_link_pic (info)
1203 && (sec->flags & SEC_ALLOC) != 0
1204 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1205 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1206 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1207 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1208 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1209 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1210 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1212 && (! SYMBOLIC_BIND (info, h)
1213 || h->root.type == bfd_link_hash_defweak
1214 || !h->def_regular))))
1215 || (ELIMINATE_COPY_RELOCS
1216 && !bfd_link_pic (info)
1217 && (sec->flags & SEC_ALLOC) != 0
1219 && (h->root.type == bfd_link_hash_defweak
1220 || !h->def_regular)))
1222 struct elf_dyn_relocs *p;
1223 struct elf_dyn_relocs **head;
1225 /* We must copy these reloc types into the output file.
1226 Create a reloc section in dynobj and make room for
1230 if (htab->elf.dynobj == NULL)
1231 htab->elf.dynobj = abfd;
1233 sreloc = _bfd_elf_make_dynamic_reloc_section
1234 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1240 /* If this is a global symbol, we count the number of
1241 relocations we need for this symbol. */
1244 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1248 /* Track dynamic relocs needed for local syms too.
1249 We really need local syms available to do this
1254 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1259 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1263 vpp = &elf_section_data (s)->local_dynrel;
1264 head = (struct elf_dyn_relocs **) vpp;
1268 if (p == NULL || p->sec != sec)
1270 bfd_size_type amt = sizeof *p;
1271 p = ((struct elf_dyn_relocs *)
1272 bfd_alloc (htab->elf.dynobj, amt));
1283 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1284 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1285 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1286 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1287 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1288 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1289 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1294 /* This relocation describes the C++ object vtable hierarchy.
1295 Reconstruct it for later use during GC. */
1296 case R_390_GNU_VTINHERIT:
1297 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1301 /* This relocation describes which C++ vtable entries are actually
1302 used. Record for later use during GC. */
1303 case R_390_GNU_VTENTRY:
1304 BFD_ASSERT (h != NULL);
1306 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1318 /* Return the section that should be marked against GC for a given
1322 elf_s390_gc_mark_hook (asection *sec,
1323 struct bfd_link_info *info,
1324 Elf_Internal_Rela *rel,
1325 struct elf_link_hash_entry *h,
1326 Elf_Internal_Sym *sym)
1329 switch (ELF64_R_TYPE (rel->r_info))
1331 case R_390_GNU_VTINHERIT:
1332 case R_390_GNU_VTENTRY:
1336 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1339 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1340 entry but we found we will not create any. Called when we find we will
1341 not have any PLT for this symbol, by for example
1342 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1343 or elf_s390_size_dynamic_sections if no dynamic sections will be
1344 created (we're only linking static objects). */
1347 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1349 if (h->elf.root.type == bfd_link_hash_warning)
1350 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1352 if (h->gotplt_refcount <= 0)
1355 /* We simply add the number of gotplt references to the number
1356 * of got references for this symbol. */
1357 h->elf.got.refcount += h->gotplt_refcount;
1358 h->gotplt_refcount = -1;
1361 /* Find dynamic relocs for H that apply to read-only sections. */
1364 readonly_dynrelocs (struct elf_link_hash_entry *h)
1366 struct elf_dyn_relocs *p;
1368 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1370 asection *s = p->sec->output_section;
1372 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1378 /* Adjust a symbol defined by a dynamic object and referenced by a
1379 regular object. The current definition is in some section of the
1380 dynamic object, but we're not including those sections. We have to
1381 change the definition to something the rest of the link can
1385 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1386 struct elf_link_hash_entry *h)
1388 struct elf_s390_link_hash_table *htab;
1391 /* STT_GNU_IFUNC symbol must go through PLT. */
1392 if (s390_is_ifunc_symbol_p (h))
1394 /* All local STT_GNU_IFUNC references must be treated as local
1395 calls via local PLT. */
1396 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1398 bfd_size_type pc_count = 0, count = 0;
1399 struct elf_dyn_relocs **pp;
1400 struct elf_s390_link_hash_entry *eh;
1401 struct elf_dyn_relocs *p;
1403 eh = (struct elf_s390_link_hash_entry *) h;
1404 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1406 pc_count += p->pc_count;
1407 p->count -= p->pc_count;
1416 if (pc_count || count)
1420 if (h->plt.refcount <= 0)
1421 h->plt.refcount = 1;
1423 h->plt.refcount += 1;
1427 if (h->plt.refcount <= 0)
1429 h->plt.offset = (bfd_vma) -1;
1435 /* If this is a function, put it in the procedure linkage table. We
1436 will fill in the contents of the procedure linkage table later
1437 (although we could actually do it here). */
1438 if (h->type == STT_FUNC
1441 if (h->plt.refcount <= 0
1442 || SYMBOL_CALLS_LOCAL (info, h)
1443 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1445 /* This case can occur if we saw a PLT32 reloc in an input
1446 file, but the symbol was never referred to by a dynamic
1447 object, or if all references were garbage collected. In
1448 such a case, we don't actually need to build a procedure
1449 linkage table, and we can just do a PC32 reloc instead. */
1450 h->plt.offset = (bfd_vma) -1;
1452 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1458 /* It's possible that we incorrectly decided a .plt reloc was
1459 needed for an R_390_PC32 reloc to a non-function sym in
1460 check_relocs. We can't decide accurately between function and
1461 non-function syms in check-relocs; Objects loaded later in
1462 the link may change h->type. So fix it now. */
1463 h->plt.offset = (bfd_vma) -1;
1465 /* If this is a weak symbol, and there is a real definition, the
1466 processor independent code will have arranged for us to see the
1467 real definition first, and we can just use the same value. */
1468 if (h->is_weakalias)
1470 struct elf_link_hash_entry *def = weakdef (h);
1471 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1472 h->root.u.def.section = def->root.u.def.section;
1473 h->root.u.def.value = def->root.u.def.value;
1474 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1475 h->non_got_ref = def->non_got_ref;
1479 /* This is a reference to a symbol defined by a dynamic object which
1480 is not a function. */
1482 /* If we are creating a shared library, we must presume that the
1483 only references to the symbol are via the global offset table.
1484 For such cases we need not do anything here; the relocations will
1485 be handled correctly by relocate_section. */
1486 if (bfd_link_pic (info))
1489 /* If there are no references to this symbol that do not use the
1490 GOT, we don't need to generate a copy reloc. */
1491 if (!h->non_got_ref)
1494 /* If -z nocopyreloc was given, we won't generate them either. */
1495 if (info->nocopyreloc)
1501 /* If we don't find any dynamic relocs in read-only sections, then
1502 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1503 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1509 /* We must allocate the symbol in our .dynbss section, which will
1510 become part of the .bss section of the executable. There will be
1511 an entry for this symbol in the .dynsym section. The dynamic
1512 object will contain position independent code, so all references
1513 from the dynamic object to this symbol will go through the global
1514 offset table. The dynamic linker will use the .dynsym entry to
1515 determine the address it must put in the global offset table, so
1516 both the dynamic object and the regular object will refer to the
1517 same memory location for the variable. */
1519 htab = elf_s390_hash_table (info);
1523 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1524 copy the initial value out of the dynamic object and into the
1525 runtime process image. */
1526 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1528 s = htab->elf.sdynrelro;
1529 srel = htab->elf.sreldynrelro;
1533 s = htab->elf.sdynbss;
1534 srel = htab->elf.srelbss;
1536 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1538 srel->size += sizeof (Elf64_External_Rela);
1542 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1545 /* Allocate space in .plt, .got and associated reloc sections for
1549 allocate_dynrelocs (struct elf_link_hash_entry *h,
1552 struct bfd_link_info *info;
1553 struct elf_s390_link_hash_table *htab;
1554 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1555 struct elf_dyn_relocs *p;
1557 if (h->root.type == bfd_link_hash_indirect)
1560 info = (struct bfd_link_info *) inf;
1561 htab = elf_s390_hash_table (info);
1565 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1566 here if it is defined and referenced in a non-shared object. */
1567 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1568 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1569 else if (htab->elf.dynamic_sections_created
1570 && h->plt.refcount > 0)
1572 /* Make sure this symbol is output as a dynamic symbol.
1573 Undefined weak syms won't yet be marked as dynamic. */
1574 if (h->dynindx == -1
1575 && !h->forced_local)
1577 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1581 if (bfd_link_pic (info)
1582 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1584 asection *s = htab->elf.splt;
1586 /* If this is the first .plt entry, make room for the special
1589 s->size += PLT_FIRST_ENTRY_SIZE;
1591 h->plt.offset = s->size;
1593 /* If this symbol is not defined in a regular file, and we are
1594 not generating a shared library, then set the symbol to this
1595 location in the .plt. This is required to make function
1596 pointers compare as equal between the normal executable and
1597 the shared library. */
1598 if (! bfd_link_pic (info)
1601 h->root.u.def.section = s;
1602 h->root.u.def.value = h->plt.offset;
1605 /* Make room for this entry. */
1606 s->size += PLT_ENTRY_SIZE;
1608 /* We also need to make an entry in the .got.plt section, which
1609 will be placed in the .got section by the linker script. */
1610 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1612 /* We also need to make an entry in the .rela.plt section. */
1613 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1617 h->plt.offset = (bfd_vma) -1;
1619 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1624 h->plt.offset = (bfd_vma) -1;
1626 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1629 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1630 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1631 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1632 we can save the dynamic TLS relocation. */
1633 if (h->got.refcount > 0
1634 && !bfd_link_pic (info)
1636 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1638 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1639 /* For the GOTIE access without a literal pool entry the offset has
1640 to be stored somewhere. The immediate value in the instruction
1641 is not bit enough so the value is stored in the got. */
1643 h->got.offset = htab->elf.sgot->size;
1644 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1647 h->got.offset = (bfd_vma) -1;
1649 else if (h->got.refcount > 0)
1653 int tls_type = elf_s390_hash_entry(h)->tls_type;
1655 /* Make sure this symbol is output as a dynamic symbol.
1656 Undefined weak syms won't yet be marked as dynamic. */
1657 if (h->dynindx == -1
1658 && !h->forced_local)
1660 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1665 h->got.offset = s->size;
1666 s->size += GOT_ENTRY_SIZE;
1667 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1668 if (tls_type == GOT_TLS_GD)
1669 s->size += GOT_ENTRY_SIZE;
1670 dyn = htab->elf.dynamic_sections_created;
1671 /* R_390_TLS_IE64 needs one dynamic relocation,
1672 R_390_TLS_GD64 needs one if local symbol and two if global. */
1673 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1674 || tls_type >= GOT_TLS_IE)
1675 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1676 else if (tls_type == GOT_TLS_GD)
1677 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1678 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1679 && (bfd_link_pic (info)
1680 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1681 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1684 h->got.offset = (bfd_vma) -1;
1686 if (eh->dyn_relocs == NULL)
1689 /* In the shared -Bsymbolic case, discard space allocated for
1690 dynamic pc-relative relocs against symbols which turn out to be
1691 defined in regular objects. For the normal shared case, discard
1692 space for pc-relative relocs that have become local due to symbol
1693 visibility changes. */
1695 if (bfd_link_pic (info))
1697 if (SYMBOL_CALLS_LOCAL (info, h))
1699 struct elf_dyn_relocs **pp;
1701 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1703 p->count -= p->pc_count;
1712 /* Also discard relocs on undefined weak syms with non-default
1714 if (eh->dyn_relocs != NULL
1715 && h->root.type == bfd_link_hash_undefweak)
1717 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1718 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1719 eh->dyn_relocs = NULL;
1721 /* Make sure undefined weak symbols are output as a dynamic
1723 else if (h->dynindx == -1
1724 && !h->forced_local)
1726 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1731 else if (ELIMINATE_COPY_RELOCS)
1733 /* For the non-shared case, discard space for relocs against
1734 symbols which turn out to need copy relocs or are not
1740 || (htab->elf.dynamic_sections_created
1741 && (h->root.type == bfd_link_hash_undefweak
1742 || h->root.type == bfd_link_hash_undefined))))
1744 /* Make sure this symbol is output as a dynamic symbol.
1745 Undefined weak syms won't yet be marked as dynamic. */
1746 if (h->dynindx == -1
1747 && !h->forced_local)
1749 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1753 /* If that succeeded, we know we'll be keeping all the
1755 if (h->dynindx != -1)
1759 eh->dyn_relocs = NULL;
1764 /* Finally, allocate space. */
1765 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1767 asection *sreloc = elf_section_data (p->sec)->sreloc;
1768 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1774 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1775 read-only sections. */
1778 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1782 if (h->root.type == bfd_link_hash_indirect)
1785 sec = readonly_dynrelocs (h);
1788 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1790 info->flags |= DF_TEXTREL;
1791 info->callbacks->minfo
1792 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1793 sec->owner, h->root.root.string, sec);
1795 /* Not an error, just cut short the traversal. */
1801 /* Set the sizes of the dynamic sections. */
1804 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1805 struct bfd_link_info *info)
1807 struct elf_s390_link_hash_table *htab;
1813 htab = elf_s390_hash_table (info);
1817 dynobj = htab->elf.dynobj;
1821 if (htab->elf.dynamic_sections_created)
1823 /* Set the contents of the .interp section to the interpreter. */
1824 if (bfd_link_executable (info) && !info->nointerp)
1826 s = bfd_get_linker_section (dynobj, ".interp");
1829 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1830 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1834 /* Set up .got offsets for local syms, and space for local dynamic
1836 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1838 bfd_signed_vma *local_got;
1839 bfd_signed_vma *end_local_got;
1840 char *local_tls_type;
1841 bfd_size_type locsymcount;
1842 Elf_Internal_Shdr *symtab_hdr;
1844 struct plt_entry *local_plt;
1847 if (! is_s390_elf (ibfd))
1850 for (s = ibfd->sections; s != NULL; s = s->next)
1852 struct elf_dyn_relocs *p;
1854 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1856 if (!bfd_is_abs_section (p->sec)
1857 && bfd_is_abs_section (p->sec->output_section))
1859 /* Input section has been discarded, either because
1860 it is a copy of a linkonce section or due to
1861 linker script /DISCARD/, so we'll be discarding
1864 else if (p->count != 0)
1866 srela = elf_section_data (p->sec)->sreloc;
1867 srela->size += p->count * sizeof (Elf64_External_Rela);
1868 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1869 info->flags |= DF_TEXTREL;
1874 local_got = elf_local_got_refcounts (ibfd);
1878 symtab_hdr = &elf_symtab_hdr (ibfd);
1879 locsymcount = symtab_hdr->sh_info;
1880 end_local_got = local_got + locsymcount;
1881 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1883 srela = htab->elf.srelgot;
1884 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1888 *local_got = s->size;
1889 s->size += GOT_ENTRY_SIZE;
1890 if (*local_tls_type == GOT_TLS_GD)
1891 s->size += GOT_ENTRY_SIZE;
1892 if (bfd_link_pic (info))
1893 srela->size += sizeof (Elf64_External_Rela);
1896 *local_got = (bfd_vma) -1;
1899 local_plt = elf_s390_local_plt (ibfd);
1900 for (i = 0; i < symtab_hdr->sh_info; i++)
1902 if (local_plt[i].plt.refcount > 0)
1904 local_plt[i].plt.offset = htab->elf.iplt->size;
1905 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1906 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1907 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1910 local_plt[i].plt.offset = (bfd_vma) -1;
1914 if (htab->tls_ldm_got.refcount > 0)
1916 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1918 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1919 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1920 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1923 htab->tls_ldm_got.offset = -1;
1925 /* Allocate global sym .plt and .got entries, and space for global
1926 sym dynamic relocs. */
1927 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1929 /* We now have determined the sizes of the various dynamic sections.
1930 Allocate memory for them. */
1932 for (s = dynobj->sections; s != NULL; s = s->next)
1934 if ((s->flags & SEC_LINKER_CREATED) == 0)
1937 if (s == htab->elf.splt
1938 || s == htab->elf.sgot
1939 || s == htab->elf.sgotplt
1940 || s == htab->elf.sdynbss
1941 || s == htab->elf.sdynrelro
1942 || s == htab->elf.iplt
1943 || s == htab->elf.igotplt
1944 || s == htab->irelifunc)
1946 /* Strip this section if we don't need it; see the
1949 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
1951 if (s->size != 0 && s != htab->elf.srelplt)
1954 /* We use the reloc_count field as a counter if we need
1955 to copy relocs into the output file. */
1960 /* It's not one of our sections, so don't allocate space. */
1966 /* If we don't need this section, strip it from the
1967 output file. This is to handle .rela.bss and
1968 .rela.plt. We must create it in
1969 create_dynamic_sections, because it must be created
1970 before the linker maps input sections to output
1971 sections. The linker does that before
1972 adjust_dynamic_symbol is called, and it is that
1973 function which decides whether anything needs to go
1974 into these sections. */
1976 s->flags |= SEC_EXCLUDE;
1980 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1983 /* Allocate memory for the section contents. We use bfd_zalloc
1984 here in case unused entries are not reclaimed before the
1985 section's contents are written out. This should not happen,
1986 but this way if it does, we get a R_390_NONE reloc instead
1988 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1989 if (s->contents == NULL)
1993 if (htab->elf.dynamic_sections_created)
1995 /* Add some entries to the .dynamic section. We fill in the
1996 values later, in elf_s390_finish_dynamic_sections, but we
1997 must add the entries now so that we get the correct size for
1998 the .dynamic section. The DT_DEBUG entry is filled in by the
1999 dynamic linker and used by the debugger. */
2000 #define add_dynamic_entry(TAG, VAL) \
2001 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2003 if (bfd_link_executable (info))
2005 if (!add_dynamic_entry (DT_DEBUG, 0))
2009 if (htab->elf.splt->size != 0)
2011 if (!add_dynamic_entry (DT_PLTGOT, 0)
2012 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2013 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2014 || !add_dynamic_entry (DT_JMPREL, 0))
2020 if (!add_dynamic_entry (DT_RELA, 0)
2021 || !add_dynamic_entry (DT_RELASZ, 0)
2022 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2025 /* If any dynamic relocs apply to a read-only section,
2026 then we need a DT_TEXTREL entry. */
2027 if ((info->flags & DF_TEXTREL) == 0)
2028 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2030 if ((info->flags & DF_TEXTREL) != 0)
2032 if (!add_dynamic_entry (DT_TEXTREL, 0))
2037 #undef add_dynamic_entry
2042 /* Return the base VMA address which should be subtracted from real addresses
2043 when resolving @dtpoff relocation.
2044 This is PT_TLS segment p_vaddr. */
2047 dtpoff_base (struct bfd_link_info *info)
2049 /* If tls_sec is NULL, we should have signalled an error already. */
2050 if (elf_hash_table (info)->tls_sec == NULL)
2052 return elf_hash_table (info)->tls_sec->vma;
2055 /* Return the relocation value for @tpoff relocation
2056 if STT_TLS virtual address is ADDRESS. */
2059 tpoff (struct bfd_link_info *info, bfd_vma address)
2061 struct elf_link_hash_table *htab = elf_hash_table (info);
2063 /* If tls_sec is NULL, we should have signalled an error already. */
2064 if (htab->tls_sec == NULL)
2066 return htab->tls_size + htab->tls_sec->vma - address;
2069 /* Complain if TLS instruction relocation is against an invalid
2073 invalid_tls_insn (bfd *input_bfd,
2074 asection *input_section,
2075 Elf_Internal_Rela *rel)
2077 reloc_howto_type *howto;
2079 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2081 /* xgettext:c-format */
2082 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2085 (uint64_t) rel->r_offset,
2087 bfd_set_error (bfd_error_bad_value);
2090 /* Relocate a 390 ELF section. */
2093 elf_s390_relocate_section (bfd *output_bfd,
2094 struct bfd_link_info *info,
2096 asection *input_section,
2098 Elf_Internal_Rela *relocs,
2099 Elf_Internal_Sym *local_syms,
2100 asection **local_sections)
2102 struct elf_s390_link_hash_table *htab;
2103 Elf_Internal_Shdr *symtab_hdr;
2104 struct elf_link_hash_entry **sym_hashes;
2105 bfd_vma *local_got_offsets;
2106 Elf_Internal_Rela *rel;
2107 Elf_Internal_Rela *relend;
2109 BFD_ASSERT (is_s390_elf (input_bfd));
2111 htab = elf_s390_hash_table (info);
2115 symtab_hdr = &elf_symtab_hdr (input_bfd);
2116 sym_hashes = elf_sym_hashes (input_bfd);
2117 local_got_offsets = elf_local_got_offsets (input_bfd);
2120 relend = relocs + input_section->reloc_count;
2121 for (; rel < relend; rel++)
2123 unsigned int r_type;
2124 reloc_howto_type *howto;
2125 unsigned long r_symndx;
2126 struct elf_link_hash_entry *h;
2127 Elf_Internal_Sym *sym;
2131 bfd_boolean unresolved_reloc;
2132 bfd_reloc_status_type r;
2134 asection *base_got = htab->elf.sgot;
2135 bfd_boolean resolved_to_zero;
2137 r_type = ELF64_R_TYPE (rel->r_info);
2138 if (r_type == (int) R_390_GNU_VTINHERIT
2139 || r_type == (int) R_390_GNU_VTENTRY)
2141 if (r_type >= (int) R_390_max)
2143 bfd_set_error (bfd_error_bad_value);
2147 howto = elf_howto_table + r_type;
2148 r_symndx = ELF64_R_SYM (rel->r_info);
2153 unresolved_reloc = FALSE;
2154 if (r_symndx < symtab_hdr->sh_info)
2156 sym = local_syms + r_symndx;
2157 sec = local_sections[r_symndx];
2159 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2161 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2162 if (local_plt == NULL)
2165 /* Address of the PLT slot. */
2166 relocation = (htab->elf.iplt->output_section->vma
2167 + htab->elf.iplt->output_offset
2168 + local_plt[r_symndx].plt.offset);
2172 case R_390_PLTOFF16:
2173 case R_390_PLTOFF32:
2174 case R_390_PLTOFF64:
2175 relocation -= htab->elf.sgot->output_section->vma;
2177 case R_390_GOTPLT12:
2178 case R_390_GOTPLT16:
2179 case R_390_GOTPLT20:
2180 case R_390_GOTPLT32:
2181 case R_390_GOTPLT64:
2182 case R_390_GOTPLTENT:
2190 /* Write the PLT slot address into the GOT slot. */
2191 bfd_put_64 (output_bfd, relocation,
2192 htab->elf.sgot->contents +
2193 local_got_offsets[r_symndx]);
2194 relocation = (local_got_offsets[r_symndx] +
2195 htab->elf.sgot->output_offset);
2197 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2198 relocation += htab->elf.sgot->output_section->vma;
2204 /* The output section is needed later in
2205 finish_dynamic_section when creating the dynamic
2207 local_plt[r_symndx].sec = sec;
2211 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2215 bfd_boolean warned ATTRIBUTE_UNUSED;
2216 bfd_boolean ignored ATTRIBUTE_UNUSED;
2218 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2219 r_symndx, symtab_hdr, sym_hashes,
2221 unresolved_reloc, warned, ignored);
2224 if (sec != NULL && discarded_section (sec))
2225 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2226 rel, 1, relend, howto, 0, contents);
2228 if (bfd_link_relocatable (info))
2231 resolved_to_zero = (h != NULL
2232 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2236 case R_390_GOTPLT12:
2237 case R_390_GOTPLT16:
2238 case R_390_GOTPLT20:
2239 case R_390_GOTPLT32:
2240 case R_390_GOTPLT64:
2241 case R_390_GOTPLTENT:
2242 /* There are three cases for a GOTPLT relocation. 1) The
2243 relocation is against the jump slot entry of a plt that
2244 will get emitted to the output file. 2) The relocation
2245 is against the jump slot of a plt entry that has been
2246 removed. elf_s390_adjust_gotplt has created a GOT entry
2247 as replacement. 3) The relocation is against a local symbol.
2248 Cases 2) and 3) are the same as the GOT relocation code
2249 so we just have to test for case 1 and fall through for
2251 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2255 if (s390_is_ifunc_symbol_p (h))
2257 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2258 relocation = (plt_index * GOT_ENTRY_SIZE +
2259 htab->elf.igotplt->output_offset);
2260 if (r_type == R_390_GOTPLTENT)
2261 relocation += htab->elf.igotplt->output_section->vma;
2266 Current offset - size first entry / entry size. */
2267 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2270 /* Offset in GOT is PLT index plus GOT headers(3)
2271 times 8, addr & GOT addr. */
2272 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2273 if (r_type == R_390_GOTPLTENT)
2274 relocation += htab->elf.sgot->output_section->vma;
2276 unresolved_reloc = FALSE;
2287 /* Relocation is to the entry for this symbol in the global
2289 if (base_got == NULL)
2296 off = h->got.offset;
2297 dyn = htab->elf.dynamic_sections_created;
2299 if (s390_is_ifunc_symbol_p (h))
2301 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2302 if (off == (bfd_vma)-1)
2304 /* No explicit GOT usage so redirect to the
2306 base_got = htab->elf.igotplt;
2307 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2311 /* Explicit GOT slots must contain the address
2312 of the PLT slot. This will be handled in
2313 finish_dynamic_symbol. */
2316 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2317 bfd_link_pic (info),
2319 || (bfd_link_pic (info)
2320 && SYMBOL_REFERENCES_LOCAL (info, h))
2321 || resolved_to_zero)
2323 /* This is actually a static link, or it is a
2324 -Bsymbolic link and the symbol is defined
2325 locally, or the symbol was forced to be local
2326 because of a version file. We must initialize
2327 this entry in the global offset table. Since the
2328 offset must always be a multiple of 2, we use the
2329 least significant bit to record whether we have
2330 initialized it already.
2332 When doing a dynamic link, we create a .rel.got
2333 relocation entry to initialize the value. This
2334 is done in the finish_dynamic_symbol routine. */
2339 bfd_put_64 (output_bfd, relocation,
2340 base_got->contents + off);
2345 && bfd_link_pic (info)
2346 && SYMBOL_REFERENCES_LOCAL (info, h))
2347 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2348 && ((r_type == R_390_GOTENT
2349 && (bfd_get_16 (input_bfd,
2350 contents + rel->r_offset - 2)
2351 & 0xff0f) == 0xc408)
2352 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2353 || (r_type == R_390_GOT20
2354 && (bfd_get_32 (input_bfd,
2355 contents + rel->r_offset - 2)
2356 & 0xff00f000) == 0xe300c000
2357 && bfd_get_8 (input_bfd,
2358 contents + rel->r_offset + 3) == 0x04)))
2361 unsigned short new_insn =
2362 (0xc000 | (bfd_get_8 (input_bfd,
2363 contents + rel->r_offset - 1) & 0xf0));
2364 bfd_put_16 (output_bfd, new_insn,
2365 contents + rel->r_offset - 2);
2366 r_type = R_390_PC32DBL;
2368 howto = elf_howto_table + r_type;
2369 relocation = h->root.u.def.value
2370 + h->root.u.def.section->output_section->vma
2371 + h->root.u.def.section->output_offset;
2376 unresolved_reloc = FALSE;
2380 if (local_got_offsets == NULL)
2383 off = local_got_offsets[r_symndx];
2385 /* The offset must always be a multiple of 8. We use
2386 the least significant bit to record whether we have
2387 already generated the necessary reloc. */
2392 bfd_put_64 (output_bfd, relocation,
2393 htab->elf.sgot->contents + off);
2395 if (bfd_link_pic (info))
2398 Elf_Internal_Rela outrel;
2401 s = htab->elf.srelgot;
2405 outrel.r_offset = (htab->elf.sgot->output_section->vma
2406 + htab->elf.sgot->output_offset
2408 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2409 outrel.r_addend = relocation;
2411 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2412 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2415 local_got_offsets[r_symndx] |= 1;
2419 if (off >= (bfd_vma) -2)
2422 relocation = base_got->output_offset + off;
2424 /* For @GOTENT the relocation is against the offset between
2425 the instruction and the symbols entry in the GOT and not
2426 between the start of the GOT and the symbols entry. We
2427 add the vma of the GOT to get the correct value. */
2428 if ( r_type == R_390_GOTENT
2429 || r_type == R_390_GOTPLTENT)
2430 relocation += base_got->output_section->vma;
2434 case R_390_GOTOFF16:
2435 case R_390_GOTOFF32:
2436 case R_390_GOTOFF64:
2437 /* Relocation is relative to the start of the global offset
2441 && s390_is_ifunc_symbol_p (h)
2443 && !bfd_link_executable (info))
2445 relocation = (htab->elf.iplt->output_section->vma
2446 + htab->elf.iplt->output_offset
2448 - htab->elf.sgot->output_section->vma);
2452 /* Note that sgot->output_offset is not involved in this
2453 calculation. We always want the start of .got. If we
2454 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2455 permitted by the ABI, we might have to change this
2457 relocation -= htab->elf.sgot->output_section->vma;
2461 case R_390_GOTPCDBL:
2462 /* Use global offset table as symbol value. */
2463 relocation = htab->elf.sgot->output_section->vma;
2464 unresolved_reloc = FALSE;
2467 case R_390_PLT12DBL:
2468 case R_390_PLT16DBL:
2469 case R_390_PLT24DBL:
2471 case R_390_PLT32DBL:
2473 /* Relocation is to the entry for this symbol in the
2474 procedure linkage table. */
2476 /* Resolve a PLT32 reloc against a local symbol directly,
2477 without using the procedure linkage table. */
2481 if (h->plt.offset == (bfd_vma) -1
2482 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2484 /* We didn't make a PLT entry for this symbol. This
2485 happens when statically linking PIC code, or when
2486 using -Bsymbolic. */
2489 if (s390_is_ifunc_symbol_p (h))
2490 relocation = (htab->elf.iplt->output_section->vma
2491 + htab->elf.iplt->output_offset
2494 relocation = (htab->elf.splt->output_section->vma
2495 + htab->elf.splt->output_offset
2497 unresolved_reloc = FALSE;
2500 case R_390_PLTOFF16:
2501 case R_390_PLTOFF32:
2502 case R_390_PLTOFF64:
2503 /* Relocation is to the entry for this symbol in the
2504 procedure linkage table relative to the start of the GOT. */
2506 /* For local symbols or if we didn't make a PLT entry for
2507 this symbol resolve the symbol directly. */
2509 || h->plt.offset == (bfd_vma) -1
2510 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2512 relocation -= htab->elf.sgot->output_section->vma;
2516 if (s390_is_ifunc_symbol_p (h))
2517 relocation = (htab->elf.iplt->output_section->vma
2518 + htab->elf.iplt->output_offset
2520 - htab->elf.sgot->output_section->vma);
2522 relocation = (htab->elf.splt->output_section->vma
2523 + htab->elf.splt->output_offset
2525 - htab->elf.sgot->output_section->vma);
2526 unresolved_reloc = FALSE;
2537 && bfd_link_pie (info)
2540 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2541 "in shared library and accessed "
2543 "(rebuild file with -fPIC ?)"),
2544 input_bfd, h->root.root.string);
2545 bfd_set_error (bfd_error_bad_value);
2548 /* The target of these relocs are instruction operands
2549 residing in read-only sections. We cannot emit a runtime
2552 && s390_is_ifunc_symbol_p (h)
2554 && bfd_link_pic (info))
2556 relocation = (htab->elf.iplt->output_section->vma
2557 + htab->elf.iplt->output_offset
2568 if ((input_section->flags & SEC_ALLOC) == 0)
2572 && s390_is_ifunc_symbol_p (h)
2575 if (!bfd_link_pic (info))
2577 /* For a non-shared object the symbol will not
2578 change. Hence we can write the address of the
2579 target IPLT slot now. */
2580 relocation = (htab->elf.iplt->output_section->vma
2581 + htab->elf.iplt->output_offset
2587 /* For shared objects a runtime relocation is needed. */
2589 Elf_Internal_Rela outrel;
2592 /* Need a dynamic relocation to get the real function
2594 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2598 if (outrel.r_offset == (bfd_vma) -1
2599 || outrel.r_offset == (bfd_vma) -2)
2602 outrel.r_offset += (input_section->output_section->vma
2603 + input_section->output_offset);
2605 if (h->dynindx == -1
2607 || bfd_link_executable (info))
2609 /* This symbol is resolved locally. */
2610 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2611 outrel.r_addend = (h->root.u.def.value
2612 + h->root.u.def.section->output_section->vma
2613 + h->root.u.def.section->output_offset);
2617 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2618 outrel.r_addend = 0;
2621 sreloc = htab->elf.irelifunc;
2622 elf_append_rela (output_bfd, sreloc, &outrel);
2624 /* If this reloc is against an external symbol, we
2625 do not want to fiddle with the addend. Otherwise,
2626 we need to include the symbol value so that it
2627 becomes an addend for the dynamic reloc. For an
2628 internal symbol, we have updated addend. */
2633 if ((bfd_link_pic (info)
2635 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2636 && !resolved_to_zero)
2637 || h->root.type != bfd_link_hash_undefweak)
2638 && ((r_type != R_390_PC16
2639 && r_type != R_390_PC12DBL
2640 && r_type != R_390_PC16DBL
2641 && r_type != R_390_PC24DBL
2642 && r_type != R_390_PC32
2643 && r_type != R_390_PC32DBL
2644 && r_type != R_390_PC64)
2645 || !SYMBOL_CALLS_LOCAL (info, h)))
2646 || (ELIMINATE_COPY_RELOCS
2647 && !bfd_link_pic (info)
2653 || h->root.type == bfd_link_hash_undefweak
2654 || h->root.type == bfd_link_hash_undefined)))
2656 Elf_Internal_Rela outrel;
2657 bfd_boolean skip, relocate;
2661 /* When generating a shared object, these relocations
2662 are copied into the output file to be resolved at run
2668 _bfd_elf_section_offset (output_bfd, info, input_section,
2670 if (outrel.r_offset == (bfd_vma) -1)
2672 else if (outrel.r_offset == (bfd_vma) -2)
2673 skip = TRUE, relocate = TRUE;
2675 outrel.r_offset += (input_section->output_section->vma
2676 + input_section->output_offset);
2679 memset (&outrel, 0, sizeof outrel);
2682 && (r_type == R_390_PC16
2683 || r_type == R_390_PC12DBL
2684 || r_type == R_390_PC16DBL
2685 || r_type == R_390_PC24DBL
2686 || r_type == R_390_PC32
2687 || r_type == R_390_PC32DBL
2688 || r_type == R_390_PC64
2689 || !bfd_link_pic (info)
2690 || !SYMBOLIC_BIND (info, h)
2691 || !h->def_regular))
2693 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2694 outrel.r_addend = rel->r_addend;
2698 /* This symbol is local, or marked to become local. */
2699 outrel.r_addend = relocation + rel->r_addend;
2700 if (r_type == R_390_64)
2703 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2709 if (bfd_is_abs_section (sec))
2711 else if (sec == NULL || sec->owner == NULL)
2713 bfd_set_error(bfd_error_bad_value);
2720 osec = sec->output_section;
2721 sindx = elf_section_data (osec)->dynindx;
2725 osec = htab->elf.text_index_section;
2726 sindx = elf_section_data (osec)->dynindx;
2728 BFD_ASSERT (sindx != 0);
2730 /* We are turning this relocation into one
2731 against a section symbol, so subtract out
2732 the output section's address but not the
2733 offset of the input section in the output
2735 outrel.r_addend -= osec->vma;
2737 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2741 sreloc = elf_section_data (input_section)->sreloc;
2745 loc = sreloc->contents;
2746 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2747 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2749 /* If this reloc is against an external symbol, we do
2750 not want to fiddle with the addend. Otherwise, we
2751 need to include the symbol value so that it becomes
2752 an addend for the dynamic reloc. */
2759 /* Relocations for tls literal pool entries. */
2760 case R_390_TLS_IE64:
2761 if (bfd_link_pic (info))
2763 Elf_Internal_Rela outrel;
2767 outrel.r_offset = rel->r_offset
2768 + input_section->output_section->vma
2769 + input_section->output_offset;
2770 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2771 sreloc = elf_section_data (input_section)->sreloc;
2774 loc = sreloc->contents;
2775 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2776 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2780 case R_390_TLS_GD64:
2781 case R_390_TLS_GOTIE64:
2782 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2783 tls_type = GOT_UNKNOWN;
2784 if (h == NULL && local_got_offsets)
2785 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2788 tls_type = elf_s390_hash_entry(h)->tls_type;
2789 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2790 r_type = R_390_TLS_LE64;
2792 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2793 r_type = R_390_TLS_IE64;
2795 if (r_type == R_390_TLS_LE64)
2797 /* This relocation gets optimized away by the local exec
2798 access optimization. */
2799 BFD_ASSERT (! unresolved_reloc);
2800 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2801 contents + rel->r_offset);
2805 if (htab->elf.sgot == NULL)
2809 off = h->got.offset;
2812 if (local_got_offsets == NULL)
2815 off = local_got_offsets[r_symndx];
2824 Elf_Internal_Rela outrel;
2828 if (htab->elf.srelgot == NULL)
2831 outrel.r_offset = (htab->elf.sgot->output_section->vma
2832 + htab->elf.sgot->output_offset + off);
2834 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2835 if (r_type == R_390_TLS_GD64)
2836 dr_type = R_390_TLS_DTPMOD;
2838 dr_type = R_390_TLS_TPOFF;
2839 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2840 outrel.r_addend = relocation - dtpoff_base (info);
2842 outrel.r_addend = 0;
2843 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2844 loc = htab->elf.srelgot->contents;
2845 loc += htab->elf.srelgot->reloc_count++
2846 * sizeof (Elf64_External_Rela);
2847 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2849 if (r_type == R_390_TLS_GD64)
2853 BFD_ASSERT (! unresolved_reloc);
2854 bfd_put_64 (output_bfd,
2855 relocation - dtpoff_base (info),
2856 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2860 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2861 outrel.r_offset += GOT_ENTRY_SIZE;
2862 outrel.r_addend = 0;
2863 htab->elf.srelgot->reloc_count++;
2864 loc += sizeof (Elf64_External_Rela);
2865 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2872 local_got_offsets[r_symndx] |= 1;
2875 if (off >= (bfd_vma) -2)
2877 if (r_type == ELF64_R_TYPE (rel->r_info))
2879 relocation = htab->elf.sgot->output_offset + off;
2880 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2881 relocation += htab->elf.sgot->output_section->vma;
2882 unresolved_reloc = FALSE;
2886 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2887 contents + rel->r_offset);
2892 case R_390_TLS_GOTIE12:
2893 case R_390_TLS_GOTIE20:
2894 case R_390_TLS_IEENT:
2897 if (local_got_offsets == NULL)
2899 off = local_got_offsets[r_symndx];
2900 if (bfd_link_pic (info))
2901 goto emit_tls_relocs;
2905 off = h->got.offset;
2906 tls_type = elf_s390_hash_entry(h)->tls_type;
2907 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2908 goto emit_tls_relocs;
2911 if (htab->elf.sgot == NULL)
2914 BFD_ASSERT (! unresolved_reloc);
2915 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2916 htab->elf.sgot->contents + off);
2917 relocation = htab->elf.sgot->output_offset + off;
2918 if (r_type == R_390_TLS_IEENT)
2919 relocation += htab->elf.sgot->output_section->vma;
2920 unresolved_reloc = FALSE;
2923 case R_390_TLS_LDM64:
2924 if (! bfd_link_pic (info))
2925 /* The literal pool entry this relocation refers to gets ignored
2926 by the optimized code of the local exec model. Do nothing
2927 and the value will turn out zero. */
2930 if (htab->elf.sgot == NULL)
2933 off = htab->tls_ldm_got.offset;
2938 Elf_Internal_Rela outrel;
2941 if (htab->elf.srelgot == NULL)
2944 outrel.r_offset = (htab->elf.sgot->output_section->vma
2945 + htab->elf.sgot->output_offset + off);
2947 bfd_put_64 (output_bfd, 0,
2948 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2949 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2950 outrel.r_addend = 0;
2951 loc = htab->elf.srelgot->contents;
2952 loc += htab->elf.srelgot->reloc_count++
2953 * sizeof (Elf64_External_Rela);
2954 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2955 htab->tls_ldm_got.offset |= 1;
2957 relocation = htab->elf.sgot->output_offset + off;
2958 unresolved_reloc = FALSE;
2961 case R_390_TLS_LE64:
2962 if (bfd_link_dll (info))
2964 /* Linking a shared library with non-fpic code requires
2965 a R_390_TLS_TPOFF relocation. */
2966 Elf_Internal_Rela outrel;
2971 outrel.r_offset = rel->r_offset
2972 + input_section->output_section->vma
2973 + input_section->output_offset;
2974 if (h != NULL && h->dynindx != -1)
2978 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2980 outrel.r_addend = relocation - dtpoff_base (info);
2982 outrel.r_addend = 0;
2983 sreloc = elf_section_data (input_section)->sreloc;
2986 loc = sreloc->contents;
2987 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2988 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2992 BFD_ASSERT (! unresolved_reloc);
2993 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2994 contents + rel->r_offset);
2998 case R_390_TLS_LDO64:
2999 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3000 relocation -= dtpoff_base (info);
3002 /* When converting LDO to LE, we must negate. */
3003 relocation = -tpoff (info, relocation);
3006 /* Relocations for tls instructions. */
3007 case R_390_TLS_LOAD:
3008 case R_390_TLS_GDCALL:
3009 case R_390_TLS_LDCALL:
3010 tls_type = GOT_UNKNOWN;
3011 if (h == NULL && local_got_offsets)
3012 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3014 tls_type = elf_s390_hash_entry(h)->tls_type;
3016 if (tls_type == GOT_TLS_GD)
3019 if (r_type == R_390_TLS_LOAD)
3021 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3023 /* IE->LE transition. Four valid cases:
3024 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3025 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3026 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3027 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3028 unsigned int insn0, insn1, ry;
3030 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3031 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3032 if (insn1 != 0x0004)
3034 invalid_tls_insn (input_bfd, input_section, rel);
3037 if ((insn0 & 0xff00f000) == 0xe3000000)
3038 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3039 ry = (insn0 & 0x000f0000);
3040 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3041 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3042 ry = (insn0 & 0x0000f000) << 4;
3043 else if ((insn0 & 0xff00f000) == 0xe300c000)
3044 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3045 ry = (insn0 & 0x000f0000);
3046 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3047 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3048 ry = (insn0 & 0x0000f000) << 4;
3051 invalid_tls_insn (input_bfd, input_section, rel);
3054 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3056 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3057 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3060 else if (r_type == R_390_TLS_GDCALL)
3062 unsigned int insn0, insn1;
3064 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3065 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3066 if ((insn0 & 0xffff0000) != 0xc0e50000)
3068 invalid_tls_insn (input_bfd, input_section, rel);
3071 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3073 /* GD->LE transition.
3074 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3080 /* GD->IE transition.
3081 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3085 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3086 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3088 else if (r_type == R_390_TLS_LDCALL)
3090 if (!bfd_link_pic (info))
3092 unsigned int insn0, insn1;
3094 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3095 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3096 if ((insn0 & 0xffff0000) != 0xc0e50000)
3098 invalid_tls_insn (input_bfd, input_section, rel);
3101 /* LD->LE transition.
3102 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3105 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3106 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3115 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3116 because such sections are not SEC_ALLOC and thus ld.so will
3117 not process them. */
3118 if (unresolved_reloc
3119 && !((input_section->flags & SEC_DEBUGGING) != 0
3121 && _bfd_elf_section_offset (output_bfd, info, input_section,
3122 rel->r_offset) != (bfd_vma) -1)
3124 /* xgettext:c-format */
3125 (_("%pB(%pA+%#" PRIx64 "): "
3126 "unresolvable %s relocation against symbol `%s'"),
3129 (uint64_t) rel->r_offset,
3131 h->root.root.string);
3135 /* When applying a 24 bit reloc we need to start one byte
3136 earlier. Otherwise the 32 bit get/put bfd operations might
3137 access a byte after the actual section. */
3138 if (r_type == R_390_PC24DBL
3139 || r_type == R_390_PLT24DBL)
3142 if (r_type == R_390_20
3143 || r_type == R_390_GOT20
3144 || r_type == R_390_GOTPLT20
3145 || r_type == R_390_TLS_GOTIE20)
3147 relocation += rel->r_addend;
3148 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3149 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3150 contents, rel->r_offset,
3154 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3155 contents, rel->r_offset,
3156 relocation, rel->r_addend);
3158 if (r != bfd_reloc_ok)
3163 name = h->root.root.string;
3166 name = bfd_elf_string_from_elf_section (input_bfd,
3167 symtab_hdr->sh_link,
3172 name = bfd_section_name (input_bfd, sec);
3175 if (r == bfd_reloc_overflow)
3176 (*info->callbacks->reloc_overflow)
3177 (info, (h ? &h->root : NULL), name, howto->name,
3178 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3182 /* xgettext:c-format */
3183 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3184 input_bfd, input_section,
3185 (uint64_t) rel->r_offset, name, (int) r);
3194 /* Generate the PLT slots together with the dynamic relocations needed
3195 for IFUNC symbols. */
3198 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3199 struct bfd_link_info *info,
3200 struct elf_link_hash_entry *h,
3201 struct elf_s390_link_hash_table *htab,
3203 bfd_vma resolver_address)
3207 Elf_Internal_Rela rela;
3209 asection *plt, *gotplt, *relplt;
3211 if (htab->elf.iplt == NULL
3212 || htab->elf.igotplt == NULL
3213 || htab->elf.irelplt == NULL)
3216 /* Index of the PLT slot within iplt section. */
3217 plt_index = plt_offset / PLT_ENTRY_SIZE;
3218 plt = htab->elf.iplt;
3219 /* Offset into the igot.plt section. */
3220 got_offset = plt_index * GOT_ENTRY_SIZE;
3221 gotplt = htab->elf.igotplt;
3222 relplt = htab->elf.irelplt;
3224 /* Fill in the blueprint of a PLT. */
3225 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3228 /* Fixup the relative address to the GOT entry */
3229 bfd_put_32 (output_bfd,
3230 (gotplt->output_section->vma +
3231 gotplt->output_offset + got_offset
3232 - (plt->output_section->vma +
3233 plt->output_offset +
3235 plt->contents + plt_offset + 2);
3236 /* Fixup the relative branch to PLT 0 */
3237 bfd_put_32 (output_bfd, - (plt->output_offset +
3238 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3239 plt->contents + plt_offset + 24);
3240 /* Fixup offset into .rela.plt section. */
3241 bfd_put_32 (output_bfd, relplt->output_offset +
3242 plt_index * sizeof (Elf64_External_Rela),
3243 plt->contents + plt_offset + 28);
3245 /* Fill in the entry in the global offset table.
3246 Points to instruction after GOT offset. */
3247 bfd_put_64 (output_bfd,
3248 (plt->output_section->vma
3249 + plt->output_offset
3252 gotplt->contents + got_offset);
3254 /* Fill in the entry in the .rela.plt section. */
3255 rela.r_offset = (gotplt->output_section->vma
3256 + gotplt->output_offset
3261 || ((bfd_link_executable (info)
3262 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3265 /* The symbol can be locally resolved. */
3266 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3267 rela.r_addend = resolver_address;
3271 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3275 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3276 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3280 /* Finish up dynamic symbol handling. We set the contents of various
3281 dynamic sections here. */
3284 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3285 struct bfd_link_info *info,
3286 struct elf_link_hash_entry *h,
3287 Elf_Internal_Sym *sym)
3289 struct elf_s390_link_hash_table *htab;
3290 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3292 htab = elf_s390_hash_table (info);
3296 if (h->plt.offset != (bfd_vma) -1)
3300 Elf_Internal_Rela rela;
3303 /* This symbol has an entry in the procedure linkage table. Set
3305 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3307 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3308 htab, h->plt.offset,
3309 eh->ifunc_resolver_address +
3310 eh->ifunc_resolver_section->output_offset +
3311 eh->ifunc_resolver_section->output_section->vma);
3313 /* Do not return yet. Handling of explicit GOT slots of
3314 IFUNC symbols is below. */
3318 if (h->dynindx == -1
3319 || htab->elf.splt == NULL
3320 || htab->elf.sgotplt == NULL
3321 || htab->elf.srelplt == NULL)
3325 Current offset - size first entry / entry size. */
3326 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3328 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3330 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3332 /* Fill in the blueprint of a PLT. */
3333 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3336 /* Fixup the relative address to the GOT entry */
3337 bfd_put_32 (output_bfd,
3338 (htab->elf.sgotplt->output_section->vma +
3339 htab->elf.sgotplt->output_offset + got_offset
3340 - (htab->elf.splt->output_section->vma +
3341 htab->elf.splt->output_offset +
3343 htab->elf.splt->contents + h->plt.offset + 2);
3344 /* Fixup the relative branch to PLT 0 */
3345 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3346 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3347 htab->elf.splt->contents + h->plt.offset + 24);
3348 /* Fixup offset into .rela.plt section. */
3349 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3350 htab->elf.splt->contents + h->plt.offset + 28);
3352 /* Fill in the entry in the global offset table.
3353 Points to instruction after GOT offset. */
3354 bfd_put_64 (output_bfd,
3355 (htab->elf.splt->output_section->vma
3356 + htab->elf.splt->output_offset
3359 htab->elf.sgotplt->contents + got_offset);
3361 /* Fill in the entry in the .rela.plt section. */
3362 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3363 + htab->elf.sgotplt->output_offset
3365 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3367 loc = htab->elf.srelplt->contents + plt_index *
3368 sizeof (Elf64_External_Rela);
3369 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3371 if (!h->def_regular)
3373 /* Mark the symbol as undefined, rather than as defined in
3374 the .plt section. Leave the value alone. This is a clue
3375 for the dynamic linker, to make function pointer
3376 comparisons work between an application and shared
3378 sym->st_shndx = SHN_UNDEF;
3383 if (h->got.offset != (bfd_vma) -1
3384 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3385 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3386 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3388 Elf_Internal_Rela rela;
3391 /* This symbol has an entry in the global offset table. Set it
3393 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3396 rela.r_offset = (htab->elf.sgot->output_section->vma
3397 + htab->elf.sgot->output_offset
3398 + (h->got.offset &~ (bfd_vma) 1));
3400 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3402 if (bfd_link_pic (info))
3404 /* An explicit GOT slot usage needs GLOB_DAT. If the
3405 symbol references local the implicit got.iplt slot
3406 will be used and the IRELATIVE reloc has been created
3412 /* For non-shared objects explicit GOT slots must be
3413 filled with the PLT slot address for pointer
3414 equality reasons. */
3415 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3416 + htab->elf.iplt->output_offset
3418 htab->elf.sgot->contents + h->got.offset);
3422 else if (bfd_link_pic (info)
3423 && SYMBOL_REFERENCES_LOCAL (info, h))
3425 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3428 /* If this is a static link, or it is a -Bsymbolic link and
3429 the symbol is defined locally or was forced to be local
3430 because of a version file, we just want to emit a
3431 RELATIVE reloc. The entry in the global offset table
3432 will already have been initialized in the
3433 relocate_section function. */
3434 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3436 BFD_ASSERT((h->got.offset & 1) != 0);
3437 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3438 rela.r_addend = (h->root.u.def.value
3439 + h->root.u.def.section->output_section->vma
3440 + h->root.u.def.section->output_offset);
3444 BFD_ASSERT((h->got.offset & 1) == 0);
3446 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3447 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3451 loc = htab->elf.srelgot->contents;
3452 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3453 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3458 Elf_Internal_Rela rela;
3462 /* This symbols needs a copy reloc. Set it up. */
3464 if (h->dynindx == -1
3465 || (h->root.type != bfd_link_hash_defined
3466 && h->root.type != bfd_link_hash_defweak)
3467 || htab->elf.srelbss == NULL)
3470 rela.r_offset = (h->root.u.def.value
3471 + h->root.u.def.section->output_section->vma
3472 + h->root.u.def.section->output_offset);
3473 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3475 if (h->root.u.def.section == htab->elf.sdynrelro)
3476 s = htab->elf.sreldynrelro;
3478 s = htab->elf.srelbss;
3479 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3480 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3483 /* Mark some specially defined symbols as absolute. */
3484 if (h == htab->elf.hdynamic
3485 || h == htab->elf.hgot
3486 || h == htab->elf.hplt)
3487 sym->st_shndx = SHN_ABS;
3492 /* Used to decide how to sort relocs in an optimal manner for the
3493 dynamic linker, before writing them out. */
3495 static enum elf_reloc_type_class
3496 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3497 const asection *rel_sec ATTRIBUTE_UNUSED,
3498 const Elf_Internal_Rela *rela)
3500 bfd *abfd = info->output_bfd;
3501 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3502 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3503 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3504 Elf_Internal_Sym sym;
3506 if (htab->elf.dynsym == NULL
3507 || !bed->s->swap_symbol_in (abfd,
3508 (htab->elf.dynsym->contents
3509 + r_symndx * bed->s->sizeof_sym),
3513 /* Check relocation against STT_GNU_IFUNC symbol. */
3514 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3515 return reloc_class_ifunc;
3517 switch ((int) ELF64_R_TYPE (rela->r_info))
3519 case R_390_RELATIVE:
3520 return reloc_class_relative;
3521 case R_390_JMP_SLOT:
3522 return reloc_class_plt;
3524 return reloc_class_copy;
3526 return reloc_class_normal;
3530 /* Finish up the dynamic sections. */
3533 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3534 struct bfd_link_info *info)
3536 struct elf_s390_link_hash_table *htab;
3542 htab = elf_s390_hash_table (info);
3546 dynobj = htab->elf.dynobj;
3547 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3549 if (htab->elf.dynamic_sections_created)
3551 Elf64_External_Dyn *dyncon, *dynconend;
3553 if (sdyn == NULL || htab->elf.sgot == NULL)
3556 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3557 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3558 for (; dyncon < dynconend; dyncon++)
3560 Elf_Internal_Dyn dyn;
3563 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3571 s = htab->elf.sgotplt;
3572 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3576 s = htab->elf.srelplt;
3577 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3581 dyn.d_un.d_val = htab->elf.srelplt->size;
3582 if (htab->elf.irelplt)
3583 dyn.d_un.d_val += htab->elf.irelplt->size;
3587 /* The procedure linkage table relocs (DT_JMPREL) should
3588 not be included in the overall relocs (DT_RELA).
3589 Therefore, we override the DT_RELASZ entry here to
3590 make it not include the JMPREL relocs. Since the
3591 linker script arranges for .rela.plt to follow all
3592 other relocation sections, we don't have to worry
3593 about changing the DT_RELA entry. */
3594 dyn.d_un.d_val -= htab->elf.srelplt->size;
3595 if (htab->elf.irelplt)
3596 dyn.d_un.d_val -= htab->elf.irelplt->size;
3600 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3603 /* Fill in the special first entry in the procedure linkage table. */
3604 if (htab->elf.splt && htab->elf.splt->size > 0)
3606 /* fill in blueprint for plt 0 entry */
3607 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3608 PLT_FIRST_ENTRY_SIZE);
3609 /* Fixup relative address to start of GOT */
3610 bfd_put_32 (output_bfd,
3611 (htab->elf.sgotplt->output_section->vma
3612 + htab->elf.sgotplt->output_offset
3613 - htab->elf.splt->output_section->vma
3614 - htab->elf.splt->output_offset - 6)/2,
3615 htab->elf.splt->contents + 8);
3617 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3618 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3622 if (htab->elf.sgotplt)
3624 /* Fill in the first three entries in the global offset table. */
3625 if (htab->elf.sgotplt->size > 0)
3627 bfd_put_64 (output_bfd,
3628 (sdyn == NULL ? (bfd_vma) 0
3629 : sdyn->output_section->vma + sdyn->output_offset),
3630 htab->elf.sgotplt->contents);
3631 /* One entry for shared object struct ptr. */
3632 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3633 /* One entry for _dl_runtime_resolve. */
3634 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3637 elf_section_data (htab->elf.sgot->output_section)
3638 ->this_hdr.sh_entsize = 8;
3641 /* Finish dynamic symbol for local IFUNC symbols. */
3642 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3644 struct plt_entry *local_plt;
3645 Elf_Internal_Sym *isym;
3646 Elf_Internal_Shdr *symtab_hdr;
3648 symtab_hdr = &elf_symtab_hdr (ibfd);
3650 if (!is_s390_elf (ibfd))
3653 local_plt = elf_s390_local_plt (ibfd);
3654 if (local_plt != NULL)
3655 for (i = 0; i < symtab_hdr->sh_info; i++)
3657 if (local_plt[i].plt.offset != (bfd_vma) -1)
3659 asection *sec = local_plt[i].sec;
3660 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3664 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3665 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3666 local_plt[i].plt.offset,
3668 + sec->output_section->vma
3669 + sec->output_offset);
3678 /* Support for core dump NOTE sections. */
3681 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3686 switch (note->descsz)
3691 case 336: /* sizeof(struct elf_prstatus) on s390x */
3693 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3696 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3704 /* Make a ".reg/999" section. */
3705 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3706 size, note->descpos + offset);
3710 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3712 switch (note->descsz)
3717 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3718 elf_tdata (abfd)->core->pid
3719 = bfd_get_32 (abfd, note->descdata + 24);
3720 elf_tdata (abfd)->core->program
3721 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3722 elf_tdata (abfd)->core->command
3723 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3726 /* Note that for some reason, a spurious space is tacked
3727 onto the end of the args in some (at least one anyway)
3728 implementations, so strip it off if it exists. */
3731 char *command = elf_tdata (abfd)->core->command;
3732 int n = strlen (command);
3734 if (0 < n && command[n - 1] == ' ')
3735 command[n - 1] = '\0';
3742 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3754 char data[136] ATTRIBUTE_NONSTRING = { 0 };
3755 const char *fname, *psargs;
3757 va_start (ap, note_type);
3758 fname = va_arg (ap, const char *);
3759 psargs = va_arg (ap, const char *);
3762 strncpy (data + 40, fname, 16);
3764 /* GCC 8.1 warns about 80 equals destination size with
3765 -Wstringop-truncation:
3766 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3768 #if GCC_VERSION == 8001
3769 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3771 strncpy (data + 56, psargs, 80);
3773 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3774 &data, sizeof (data));
3779 char data[336] = { 0 };
3784 va_start (ap, note_type);
3785 pid = va_arg (ap, long);
3786 cursig = va_arg (ap, int);
3787 gregs = va_arg (ap, const void *);
3790 bfd_put_16 (abfd, cursig, data + 12);
3791 bfd_put_32 (abfd, pid, data + 32);
3792 memcpy (data + 112, gregs, 216);
3793 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3794 &data, sizeof (data));
3800 /* Return address for Ith PLT stub in section PLT, for relocation REL
3801 or (bfd_vma) -1 if it should not be included. */
3804 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3805 const arelent *rel ATTRIBUTE_UNUSED)
3807 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3810 /* Merge backend specific data from an object file to the output
3811 object file when linking. */
3814 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3816 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3819 return elf_s390_merge_obj_attributes (ibfd, info);
3822 /* We may add a PT_S390_PGSTE program header. */
3825 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3826 struct bfd_link_info *info)
3828 struct elf_s390_link_hash_table *htab;
3832 htab = elf_s390_hash_table (info);
3834 return htab->params->pgste;
3840 /* Add the PT_S390_PGSTE program header. */
3843 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3845 struct elf_s390_link_hash_table *htab;
3846 struct elf_segment_map *m, *pm = NULL;
3851 htab = elf_s390_hash_table (info);
3852 if (!htab || !htab->params->pgste)
3855 /* If there is already a PT_S390_PGSTE header, avoid adding
3857 m = elf_seg_map (abfd);
3858 while (m && m->p_type != PT_S390_PGSTE)
3867 m = (struct elf_segment_map *)
3868 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3871 m->p_type = PT_S390_PGSTE;
3881 bfd_elf_s390_set_options (struct bfd_link_info *info,
3882 struct s390_elf_params *params)
3884 struct elf_s390_link_hash_table *htab;
3888 htab = elf_s390_hash_table (info);
3890 htab->params = params;
3897 /* Why was the hash table entry size definition changed from
3898 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3899 this is the only reason for the s390_elf64_size_info structure. */
3901 const struct elf_size_info s390_elf64_size_info =
3903 sizeof (Elf64_External_Ehdr),
3904 sizeof (Elf64_External_Phdr),
3905 sizeof (Elf64_External_Shdr),
3906 sizeof (Elf64_External_Rel),
3907 sizeof (Elf64_External_Rela),
3908 sizeof (Elf64_External_Sym),
3909 sizeof (Elf64_External_Dyn),
3910 sizeof (Elf_External_Note),
3911 8, /* hash-table entry size. */
3912 1, /* internal relocations per external relocations. */
3913 64, /* arch_size. */
3914 3, /* log_file_align. */
3915 ELFCLASS64, EV_CURRENT,
3916 bfd_elf64_write_out_phdrs,
3917 bfd_elf64_write_shdrs_and_ehdr,
3918 bfd_elf64_checksum_contents,
3919 bfd_elf64_write_relocs,
3920 bfd_elf64_swap_symbol_in,
3921 bfd_elf64_swap_symbol_out,
3922 bfd_elf64_slurp_reloc_table,
3923 bfd_elf64_slurp_symbol_table,
3924 bfd_elf64_swap_dyn_in,
3925 bfd_elf64_swap_dyn_out,
3926 bfd_elf64_swap_reloc_in,
3927 bfd_elf64_swap_reloc_out,
3928 bfd_elf64_swap_reloca_in,
3929 bfd_elf64_swap_reloca_out
3932 #define TARGET_BIG_SYM s390_elf64_vec
3933 #define TARGET_BIG_NAME "elf64-s390"
3934 #define ELF_ARCH bfd_arch_s390
3935 #define ELF_TARGET_ID S390_ELF_DATA
3936 #define ELF_MACHINE_CODE EM_S390
3937 #define ELF_MACHINE_ALT1 EM_S390_OLD
3938 #define ELF_MAXPAGESIZE 0x1000
3940 #define elf_backend_size_info s390_elf64_size_info
3942 #define elf_backend_can_gc_sections 1
3943 #define elf_backend_can_refcount 1
3944 #define elf_backend_want_got_plt 1
3945 #define elf_backend_plt_readonly 1
3946 #define elf_backend_want_plt_sym 0
3947 #define elf_backend_got_header_size 24
3948 #define elf_backend_want_dynrelro 1
3949 #define elf_backend_rela_normal 1
3951 #define elf_info_to_howto elf_s390_info_to_howto
3953 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3954 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3955 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3956 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3957 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3959 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3960 #define elf_backend_check_relocs elf_s390_check_relocs
3961 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3962 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3963 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3964 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3965 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3966 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3967 #define elf_backend_relocate_section elf_s390_relocate_section
3968 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3969 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3970 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3971 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3972 #define elf_backend_write_core_note elf_s390_write_core_note
3973 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3974 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3975 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
3976 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
3978 #define bfd_elf64_mkobject elf_s390_mkobject
3979 #define elf_backend_object_p elf_s390_object_p
3981 #include "elf64-target.h"