1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2019 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 global offset 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 rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
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 if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1316 /* Return the section that should be marked against GC for a given
1320 elf_s390_gc_mark_hook (asection *sec,
1321 struct bfd_link_info *info,
1322 Elf_Internal_Rela *rel,
1323 struct elf_link_hash_entry *h,
1324 Elf_Internal_Sym *sym)
1327 switch (ELF64_R_TYPE (rel->r_info))
1329 case R_390_GNU_VTINHERIT:
1330 case R_390_GNU_VTENTRY:
1334 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1337 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1338 entry but we found we will not create any. Called when we find we will
1339 not have any PLT for this symbol, by for example
1340 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1341 or elf_s390_size_dynamic_sections if no dynamic sections will be
1342 created (we're only linking static objects). */
1345 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1347 if (h->elf.root.type == bfd_link_hash_warning)
1348 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1350 if (h->gotplt_refcount <= 0)
1353 /* We simply add the number of gotplt references to the number
1354 * of got references for this symbol. */
1355 h->elf.got.refcount += h->gotplt_refcount;
1356 h->gotplt_refcount = -1;
1359 /* Find dynamic relocs for H that apply to read-only sections. */
1362 readonly_dynrelocs (struct elf_link_hash_entry *h)
1364 struct elf_dyn_relocs *p;
1366 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1368 asection *s = p->sec->output_section;
1370 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1376 /* Adjust a symbol defined by a dynamic object and referenced by a
1377 regular object. The current definition is in some section of the
1378 dynamic object, but we're not including those sections. We have to
1379 change the definition to something the rest of the link can
1383 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1384 struct elf_link_hash_entry *h)
1386 struct elf_s390_link_hash_table *htab;
1389 /* STT_GNU_IFUNC symbol must go through PLT. */
1390 if (s390_is_ifunc_symbol_p (h))
1392 /* All local STT_GNU_IFUNC references must be treated as local
1393 calls via local PLT. */
1394 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1396 bfd_size_type pc_count = 0, count = 0;
1397 struct elf_dyn_relocs **pp;
1398 struct elf_s390_link_hash_entry *eh;
1399 struct elf_dyn_relocs *p;
1401 eh = (struct elf_s390_link_hash_entry *) h;
1402 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1404 pc_count += p->pc_count;
1405 p->count -= p->pc_count;
1414 if (pc_count || count)
1418 if (h->plt.refcount <= 0)
1419 h->plt.refcount = 1;
1421 h->plt.refcount += 1;
1425 if (h->plt.refcount <= 0)
1427 h->plt.offset = (bfd_vma) -1;
1433 /* If this is a function, put it in the procedure linkage table. We
1434 will fill in the contents of the procedure linkage table later
1435 (although we could actually do it here). */
1436 if (h->type == STT_FUNC
1439 if (h->plt.refcount <= 0
1440 || SYMBOL_CALLS_LOCAL (info, h)
1441 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1443 /* This case can occur if we saw a PLT32 reloc in an input
1444 file, but the symbol was never referred to by a dynamic
1445 object, or if all references were garbage collected. In
1446 such a case, we don't actually need to build a procedure
1447 linkage table, and we can just do a PC32 reloc instead. */
1448 h->plt.offset = (bfd_vma) -1;
1450 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1456 /* It's possible that we incorrectly decided a .plt reloc was
1457 needed for an R_390_PC32 reloc to a non-function sym in
1458 check_relocs. We can't decide accurately between function and
1459 non-function syms in check-relocs; Objects loaded later in
1460 the link may change h->type. So fix it now. */
1461 h->plt.offset = (bfd_vma) -1;
1463 /* If this is a weak symbol, and there is a real definition, the
1464 processor independent code will have arranged for us to see the
1465 real definition first, and we can just use the same value. */
1466 if (h->is_weakalias)
1468 struct elf_link_hash_entry *def = weakdef (h);
1469 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1470 h->root.u.def.section = def->root.u.def.section;
1471 h->root.u.def.value = def->root.u.def.value;
1472 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1473 h->non_got_ref = def->non_got_ref;
1477 /* This is a reference to a symbol defined by a dynamic object which
1478 is not a function. */
1480 /* If we are creating a shared library, we must presume that the
1481 only references to the symbol are via the global offset table.
1482 For such cases we need not do anything here; the relocations will
1483 be handled correctly by relocate_section. */
1484 if (bfd_link_pic (info))
1487 /* If there are no references to this symbol that do not use the
1488 GOT, we don't need to generate a copy reloc. */
1489 if (!h->non_got_ref)
1492 /* If -z nocopyreloc was given, we won't generate them either. */
1493 if (info->nocopyreloc)
1499 /* If we don't find any dynamic relocs in read-only sections, then
1500 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1501 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1507 /* We must allocate the symbol in our .dynbss section, which will
1508 become part of the .bss section of the executable. There will be
1509 an entry for this symbol in the .dynsym section. The dynamic
1510 object will contain position independent code, so all references
1511 from the dynamic object to this symbol will go through the global
1512 offset table. The dynamic linker will use the .dynsym entry to
1513 determine the address it must put in the global offset table, so
1514 both the dynamic object and the regular object will refer to the
1515 same memory location for the variable. */
1517 htab = elf_s390_hash_table (info);
1521 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1522 copy the initial value out of the dynamic object and into the
1523 runtime process image. */
1524 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1526 s = htab->elf.sdynrelro;
1527 srel = htab->elf.sreldynrelro;
1531 s = htab->elf.sdynbss;
1532 srel = htab->elf.srelbss;
1534 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1536 srel->size += sizeof (Elf64_External_Rela);
1540 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1543 /* Allocate space in .plt, .got and associated reloc sections for
1547 allocate_dynrelocs (struct elf_link_hash_entry *h,
1550 struct bfd_link_info *info;
1551 struct elf_s390_link_hash_table *htab;
1552 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1553 struct elf_dyn_relocs *p;
1555 if (h->root.type == bfd_link_hash_indirect)
1558 info = (struct bfd_link_info *) inf;
1559 htab = elf_s390_hash_table (info);
1563 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1564 here if it is defined and referenced in a non-shared object. */
1565 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1566 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1567 else if (htab->elf.dynamic_sections_created
1568 && h->plt.refcount > 0)
1570 /* Make sure this symbol is output as a dynamic symbol.
1571 Undefined weak syms won't yet be marked as dynamic. */
1572 if (h->dynindx == -1
1573 && !h->forced_local)
1575 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1579 if (bfd_link_pic (info)
1580 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1582 asection *s = htab->elf.splt;
1584 /* If this is the first .plt entry, make room for the special
1587 s->size += PLT_FIRST_ENTRY_SIZE;
1589 h->plt.offset = s->size;
1591 /* If this symbol is not defined in a regular file, and we are
1592 not generating a shared library, then set the symbol to this
1593 location in the .plt. This is required to make function
1594 pointers compare as equal between the normal executable and
1595 the shared library. */
1596 if (! bfd_link_pic (info)
1599 h->root.u.def.section = s;
1600 h->root.u.def.value = h->plt.offset;
1603 /* Make room for this entry. */
1604 s->size += PLT_ENTRY_SIZE;
1606 /* We also need to make an entry in the .got.plt section. */
1607 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1609 /* We also need to make an entry in the .rela.plt section. */
1610 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1614 h->plt.offset = (bfd_vma) -1;
1616 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1621 h->plt.offset = (bfd_vma) -1;
1623 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1626 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1627 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1628 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1629 we can save the dynamic TLS relocation. */
1630 if (h->got.refcount > 0
1631 && !bfd_link_pic (info)
1633 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1635 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1636 /* For the GOTIE access without a literal pool entry the offset has
1637 to be stored somewhere. The immediate value in the instruction
1638 is not bit enough so the value is stored in the got. */
1640 h->got.offset = htab->elf.sgot->size;
1641 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1644 h->got.offset = (bfd_vma) -1;
1646 else if (h->got.refcount > 0)
1650 int tls_type = elf_s390_hash_entry(h)->tls_type;
1652 /* Make sure this symbol is output as a dynamic symbol.
1653 Undefined weak syms won't yet be marked as dynamic. */
1654 if (h->dynindx == -1
1655 && !h->forced_local)
1657 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1662 h->got.offset = s->size;
1663 s->size += GOT_ENTRY_SIZE;
1664 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1665 if (tls_type == GOT_TLS_GD)
1666 s->size += GOT_ENTRY_SIZE;
1667 dyn = htab->elf.dynamic_sections_created;
1668 /* R_390_TLS_IE64 needs one dynamic relocation,
1669 R_390_TLS_GD64 needs one if local symbol and two if global. */
1670 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1671 || tls_type >= GOT_TLS_IE)
1672 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1673 else if (tls_type == GOT_TLS_GD)
1674 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1675 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1676 && (bfd_link_pic (info)
1677 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1678 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1681 h->got.offset = (bfd_vma) -1;
1683 if (eh->dyn_relocs == NULL)
1686 /* In the shared -Bsymbolic case, discard space allocated for
1687 dynamic pc-relative relocs against symbols which turn out to be
1688 defined in regular objects. For the normal shared case, discard
1689 space for pc-relative relocs that have become local due to symbol
1690 visibility changes. */
1692 if (bfd_link_pic (info))
1694 if (SYMBOL_CALLS_LOCAL (info, h))
1696 struct elf_dyn_relocs **pp;
1698 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1700 p->count -= p->pc_count;
1709 /* Also discard relocs on undefined weak syms with non-default
1711 if (eh->dyn_relocs != NULL
1712 && h->root.type == bfd_link_hash_undefweak)
1714 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1715 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1716 eh->dyn_relocs = NULL;
1718 /* Make sure undefined weak symbols are output as a dynamic
1720 else if (h->dynindx == -1
1721 && !h->forced_local)
1723 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1728 else if (ELIMINATE_COPY_RELOCS)
1730 /* For the non-shared case, discard space for relocs against
1731 symbols which turn out to need copy relocs or are not
1737 || (htab->elf.dynamic_sections_created
1738 && (h->root.type == bfd_link_hash_undefweak
1739 || h->root.type == bfd_link_hash_undefined))))
1741 /* Make sure this symbol is output as a dynamic symbol.
1742 Undefined weak syms won't yet be marked as dynamic. */
1743 if (h->dynindx == -1
1744 && !h->forced_local)
1746 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1750 /* If that succeeded, we know we'll be keeping all the
1752 if (h->dynindx != -1)
1756 eh->dyn_relocs = NULL;
1761 /* Finally, allocate space. */
1762 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1764 asection *sreloc = elf_section_data (p->sec)->sreloc;
1765 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1771 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1772 read-only sections. */
1775 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1779 if (h->root.type == bfd_link_hash_indirect)
1782 sec = readonly_dynrelocs (h);
1785 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1787 info->flags |= DF_TEXTREL;
1788 info->callbacks->minfo
1789 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1790 sec->owner, h->root.root.string, sec);
1792 /* Not an error, just cut short the traversal. */
1798 /* Set the sizes of the dynamic sections. */
1801 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1802 struct bfd_link_info *info)
1804 struct elf_s390_link_hash_table *htab;
1810 htab = elf_s390_hash_table (info);
1814 dynobj = htab->elf.dynobj;
1818 if (htab->elf.dynamic_sections_created)
1820 /* Set the contents of the .interp section to the interpreter. */
1821 if (bfd_link_executable (info) && !info->nointerp)
1823 s = bfd_get_linker_section (dynobj, ".interp");
1826 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1827 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1831 if (htab->elf.sgot && s390_gotplt_after_got_p (info))
1833 /* _bfd_elf_create_got_section adds the got header size always
1834 to .got.plt but we need it in .got if this section comes
1836 htab->elf.sgot->size += 3 * GOT_ENTRY_SIZE;
1837 htab->elf.sgotplt->size -= 3 * GOT_ENTRY_SIZE;
1839 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1840 instead of .got.plt. */
1841 htab->elf.hgot->root.u.def.section = htab->elf.sgot;
1842 htab->elf.hgot->root.u.def.value = 0;
1845 /* Set up .got offsets for local syms, and space for local dynamic
1847 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1849 bfd_signed_vma *local_got;
1850 bfd_signed_vma *end_local_got;
1851 char *local_tls_type;
1852 bfd_size_type locsymcount;
1853 Elf_Internal_Shdr *symtab_hdr;
1855 struct plt_entry *local_plt;
1858 if (! is_s390_elf (ibfd))
1861 for (s = ibfd->sections; s != NULL; s = s->next)
1863 struct elf_dyn_relocs *p;
1865 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1867 if (!bfd_is_abs_section (p->sec)
1868 && bfd_is_abs_section (p->sec->output_section))
1870 /* Input section has been discarded, either because
1871 it is a copy of a linkonce section or due to
1872 linker script /DISCARD/, so we'll be discarding
1875 else if (p->count != 0)
1877 srela = elf_section_data (p->sec)->sreloc;
1878 srela->size += p->count * sizeof (Elf64_External_Rela);
1879 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1880 info->flags |= DF_TEXTREL;
1885 local_got = elf_local_got_refcounts (ibfd);
1889 symtab_hdr = &elf_symtab_hdr (ibfd);
1890 locsymcount = symtab_hdr->sh_info;
1891 end_local_got = local_got + locsymcount;
1892 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1894 srela = htab->elf.srelgot;
1895 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1899 *local_got = s->size;
1900 s->size += GOT_ENTRY_SIZE;
1901 if (*local_tls_type == GOT_TLS_GD)
1902 s->size += GOT_ENTRY_SIZE;
1903 if (bfd_link_pic (info))
1904 srela->size += sizeof (Elf64_External_Rela);
1907 *local_got = (bfd_vma) -1;
1910 local_plt = elf_s390_local_plt (ibfd);
1911 for (i = 0; i < symtab_hdr->sh_info; i++)
1913 if (local_plt[i].plt.refcount > 0)
1915 local_plt[i].plt.offset = htab->elf.iplt->size;
1916 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1917 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1918 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1921 local_plt[i].plt.offset = (bfd_vma) -1;
1925 if (htab->tls_ldm_got.refcount > 0)
1927 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1929 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1930 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1931 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1934 htab->tls_ldm_got.offset = -1;
1936 /* Allocate global sym .plt and .got entries, and space for global
1937 sym dynamic relocs. */
1938 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1940 /* We now have determined the sizes of the various dynamic sections.
1941 Allocate memory for them. */
1943 for (s = dynobj->sections; s != NULL; s = s->next)
1945 if ((s->flags & SEC_LINKER_CREATED) == 0)
1948 if (s == htab->elf.splt
1949 || s == htab->elf.sgot
1950 || s == htab->elf.sgotplt
1951 || s == htab->elf.sdynbss
1952 || s == htab->elf.sdynrelro
1953 || s == htab->elf.iplt
1954 || s == htab->elf.igotplt
1955 || s == htab->irelifunc)
1957 /* Strip this section if we don't need it; see the
1960 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
1962 if (s->size != 0 && s != htab->elf.srelplt)
1965 /* We use the reloc_count field as a counter if we need
1966 to copy relocs into the output file. */
1971 /* It's not one of our sections, so don't allocate space. */
1977 /* If we don't need this section, strip it from the
1978 output file. This is to handle .rela.bss and
1979 .rela.plt. We must create it in
1980 create_dynamic_sections, because it must be created
1981 before the linker maps input sections to output
1982 sections. The linker does that before
1983 adjust_dynamic_symbol is called, and it is that
1984 function which decides whether anything needs to go
1985 into these sections. */
1987 s->flags |= SEC_EXCLUDE;
1991 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1994 /* Allocate memory for the section contents. We use bfd_zalloc
1995 here in case unused entries are not reclaimed before the
1996 section's contents are written out. This should not happen,
1997 but this way if it does, we get a R_390_NONE reloc instead
1999 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2000 if (s->contents == NULL)
2004 if (htab->elf.dynamic_sections_created)
2006 /* Add some entries to the .dynamic section. We fill in the
2007 values later, in elf_s390_finish_dynamic_sections, but we
2008 must add the entries now so that we get the correct size for
2009 the .dynamic section. The DT_DEBUG entry is filled in by the
2010 dynamic linker and used by the debugger. */
2011 #define add_dynamic_entry(TAG, VAL) \
2012 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2014 if (bfd_link_executable (info))
2016 if (!add_dynamic_entry (DT_DEBUG, 0))
2020 if (htab->elf.splt->size != 0)
2022 if (!add_dynamic_entry (DT_PLTGOT, 0)
2023 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2024 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2025 || !add_dynamic_entry (DT_JMPREL, 0))
2031 if (!add_dynamic_entry (DT_RELA, 0)
2032 || !add_dynamic_entry (DT_RELASZ, 0)
2033 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2036 /* If any dynamic relocs apply to a read-only section,
2037 then we need a DT_TEXTREL entry. */
2038 if ((info->flags & DF_TEXTREL) == 0)
2039 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2041 if ((info->flags & DF_TEXTREL) != 0)
2043 if (!add_dynamic_entry (DT_TEXTREL, 0))
2048 #undef add_dynamic_entry
2053 /* Return the base VMA address which should be subtracted from real addresses
2054 when resolving @dtpoff relocation.
2055 This is PT_TLS segment p_vaddr. */
2058 dtpoff_base (struct bfd_link_info *info)
2060 /* If tls_sec is NULL, we should have signalled an error already. */
2061 if (elf_hash_table (info)->tls_sec == NULL)
2063 return elf_hash_table (info)->tls_sec->vma;
2066 /* Return the relocation value for @tpoff relocation
2067 if STT_TLS virtual address is ADDRESS. */
2070 tpoff (struct bfd_link_info *info, bfd_vma address)
2072 struct elf_link_hash_table *htab = elf_hash_table (info);
2074 /* If tls_sec is NULL, we should have signalled an error already. */
2075 if (htab->tls_sec == NULL)
2077 return htab->tls_size + htab->tls_sec->vma - address;
2080 /* Complain if TLS instruction relocation is against an invalid
2084 invalid_tls_insn (bfd *input_bfd,
2085 asection *input_section,
2086 Elf_Internal_Rela *rel)
2088 reloc_howto_type *howto;
2090 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2092 /* xgettext:c-format */
2093 (_("%pB(%pA+%#" PRIx64 "): invalid instruction for TLS relocation %s"),
2096 (uint64_t) rel->r_offset,
2098 bfd_set_error (bfd_error_bad_value);
2101 /* Relocate a 390 ELF section. */
2104 elf_s390_relocate_section (bfd *output_bfd,
2105 struct bfd_link_info *info,
2107 asection *input_section,
2109 Elf_Internal_Rela *relocs,
2110 Elf_Internal_Sym *local_syms,
2111 asection **local_sections)
2113 struct elf_s390_link_hash_table *htab;
2114 Elf_Internal_Shdr *symtab_hdr;
2115 struct elf_link_hash_entry **sym_hashes;
2116 bfd_vma *local_got_offsets;
2117 Elf_Internal_Rela *rel;
2118 Elf_Internal_Rela *relend;
2120 if (!is_s390_elf (input_bfd))
2122 bfd_set_error (bfd_error_wrong_format);
2126 htab = elf_s390_hash_table (info);
2130 symtab_hdr = &elf_symtab_hdr (input_bfd);
2131 sym_hashes = elf_sym_hashes (input_bfd);
2132 local_got_offsets = elf_local_got_offsets (input_bfd);
2135 relend = relocs + input_section->reloc_count;
2136 for (; rel < relend; rel++)
2138 unsigned int r_type;
2139 reloc_howto_type *howto;
2140 unsigned long r_symndx;
2141 struct elf_link_hash_entry *h;
2142 Elf_Internal_Sym *sym;
2146 bfd_boolean unresolved_reloc;
2147 bfd_reloc_status_type r;
2149 bfd_boolean resolved_to_zero;
2151 r_type = ELF64_R_TYPE (rel->r_info);
2152 if (r_type == (int) R_390_GNU_VTINHERIT
2153 || r_type == (int) R_390_GNU_VTENTRY)
2155 if (r_type >= (int) R_390_max)
2157 bfd_set_error (bfd_error_bad_value);
2161 howto = elf_howto_table + r_type;
2162 r_symndx = ELF64_R_SYM (rel->r_info);
2167 unresolved_reloc = FALSE;
2168 if (r_symndx < symtab_hdr->sh_info)
2170 sym = local_syms + r_symndx;
2171 sec = local_sections[r_symndx];
2173 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2175 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2176 if (local_plt == NULL)
2179 /* Address of the PLT slot. */
2180 relocation = (htab->elf.iplt->output_section->vma
2181 + htab->elf.iplt->output_offset
2182 + local_plt[r_symndx].plt.offset);
2186 case R_390_PLTOFF16:
2187 case R_390_PLTOFF32:
2188 case R_390_PLTOFF64:
2189 relocation -= s390_got_pointer (info);
2191 case R_390_GOTPLT12:
2192 case R_390_GOTPLT16:
2193 case R_390_GOTPLT20:
2194 case R_390_GOTPLT32:
2195 case R_390_GOTPLT64:
2196 case R_390_GOTPLTENT:
2204 /* Write the PLT slot address into the GOT slot. */
2205 bfd_put_64 (output_bfd, relocation,
2206 htab->elf.sgot->contents +
2207 local_got_offsets[r_symndx]);
2208 relocation = (local_got_offsets[r_symndx] +
2209 s390_got_offset (info));
2211 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2212 relocation += s390_got_pointer (info);
2218 /* The output section is needed later in
2219 finish_dynamic_section when creating the dynamic
2221 local_plt[r_symndx].sec = sec;
2225 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2229 bfd_boolean warned ATTRIBUTE_UNUSED;
2230 bfd_boolean ignored ATTRIBUTE_UNUSED;
2232 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2233 r_symndx, symtab_hdr, sym_hashes,
2235 unresolved_reloc, warned, ignored);
2238 if (sec != NULL && discarded_section (sec))
2239 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2240 rel, 1, relend, howto, 0, contents);
2242 if (bfd_link_relocatable (info))
2245 resolved_to_zero = (h != NULL
2246 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2250 case R_390_GOTPLT12:
2251 case R_390_GOTPLT16:
2252 case R_390_GOTPLT20:
2253 case R_390_GOTPLT32:
2254 case R_390_GOTPLT64:
2255 case R_390_GOTPLTENT:
2256 /* There are three cases for a GOTPLT relocation. 1) The
2257 relocation is against the jump slot entry of a plt that
2258 will get emitted to the output file. 2) The relocation
2259 is against the jump slot of a plt entry that has been
2260 removed. elf_s390_adjust_gotplt has created a GOT entry
2261 as replacement. 3) The relocation is against a local symbol.
2262 Cases 2) and 3) are the same as the GOT relocation code
2263 so we just have to test for case 1 and fall through for
2265 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2269 if (s390_is_ifunc_symbol_p (h))
2271 /* Entry indices of .iplt and .igot.plt match
2272 1:1. No magic PLT first entry here. */
2273 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2274 relocation = (plt_index * GOT_ENTRY_SIZE
2275 + s390_gotplt_offset (info)
2276 + htab->elf.igotplt->output_offset);
2280 plt_index = ((h->plt.offset - PLT_FIRST_ENTRY_SIZE)
2283 relocation = (plt_index * GOT_ENTRY_SIZE
2284 + s390_gotplt_offset (info));
2286 if (r_type == R_390_GOTPLTENT)
2287 relocation += s390_got_pointer (info);
2288 unresolved_reloc = FALSE;
2299 /* Relocation is to the entry for this symbol in the global
2301 if (htab->elf.sgot == NULL)
2308 off = h->got.offset;
2309 dyn = htab->elf.dynamic_sections_created;
2311 if (s390_is_ifunc_symbol_p (h))
2313 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2314 if (off == (bfd_vma)-1)
2316 /* No explicit GOT usage so redirect to the
2318 relocation = (s390_gotplt_offset (info)
2319 + htab->elf.igotplt->output_offset
2320 + (h->plt.offset / PLT_ENTRY_SIZE
2323 /* For @GOTENT the relocation is against the offset between
2324 the instruction and the symbols entry in the GOT and not
2325 between the start of the GOT and the symbols entry. We
2326 add the vma of the GOT to get the correct value. */
2327 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2328 relocation += s390_got_pointer (info);
2334 /* Explicit GOT slots must contain the address
2335 of the PLT slot. This will be handled in
2336 finish_dynamic_symbol. */
2339 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2340 bfd_link_pic (info),
2342 || (bfd_link_pic (info)
2343 && SYMBOL_REFERENCES_LOCAL (info, h))
2344 || resolved_to_zero)
2346 Elf_Internal_Sym *isym;
2349 /* This is actually a static link, or it is a
2350 -Bsymbolic link and the symbol is defined
2351 locally, or the symbol was forced to be local
2352 because of a version file. We must initialize
2353 this entry in the global offset table. Since the
2354 offset must always be a multiple of 2, we use the
2355 least significant bit to record whether we have
2356 initialized it already.
2358 When doing a dynamic link, we create a .rel.got
2359 relocation entry to initialize the value. This
2360 is done in the finish_dynamic_symbol routine. */
2365 bfd_put_64 (output_bfd, relocation,
2366 htab->elf.sgot->contents + off);
2370 /* When turning a GOT slot dereference into a direct
2371 reference using larl we have to make sure that
2372 the symbol is 1. properly aligned and 2. it is no
2373 ABS symbol or will become one. */
2375 && bfd_link_pic (info)
2376 && SYMBOL_REFERENCES_LOCAL (info, h))
2377 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2378 && ((r_type == R_390_GOTENT
2379 && (bfd_get_16 (input_bfd,
2380 contents + rel->r_offset - 2)
2381 & 0xff0f) == 0xc408)
2382 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2383 || (r_type == R_390_GOT20
2384 && (bfd_get_32 (input_bfd,
2385 contents + rel->r_offset - 2)
2386 & 0xff00f000) == 0xe300c000
2387 && bfd_get_8 (input_bfd,
2388 contents + rel->r_offset + 3) == 0x04))
2389 && (isym = bfd_sym_from_r_symndx (&htab->sym_cache,
2390 input_bfd, r_symndx))
2391 && isym->st_shndx != SHN_ABS
2392 && h != htab->elf.hdynamic
2393 && h != htab->elf.hgot
2394 && h != htab->elf.hplt
2395 && !(isym->st_value & 1)
2396 && (sym_sec = bfd_section_from_elf_index (input_bfd,
2398 && sym_sec->alignment_power)
2400 unsigned short new_insn =
2401 (0xc000 | (bfd_get_8 (input_bfd,
2402 contents + rel->r_offset - 1) & 0xf0));
2403 bfd_put_16 (output_bfd, new_insn,
2404 contents + rel->r_offset - 2);
2405 r_type = R_390_PC32DBL;
2407 howto = elf_howto_table + r_type;
2408 relocation = h->root.u.def.value
2409 + h->root.u.def.section->output_section->vma
2410 + h->root.u.def.section->output_offset;
2415 unresolved_reloc = FALSE;
2419 if (local_got_offsets == NULL)
2422 off = local_got_offsets[r_symndx];
2424 /* The offset must always be a multiple of 8. We use
2425 the least significant bit to record whether we have
2426 already generated the necessary reloc. */
2431 bfd_put_64 (output_bfd, relocation,
2432 htab->elf.sgot->contents + off);
2434 if (bfd_link_pic (info))
2437 Elf_Internal_Rela outrel;
2440 s = htab->elf.srelgot;
2444 outrel.r_offset = (htab->elf.sgot->output_section->vma
2445 + htab->elf.sgot->output_offset
2447 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2448 outrel.r_addend = relocation;
2450 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2451 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2454 local_got_offsets[r_symndx] |= 1;
2458 if (off >= (bfd_vma) -2)
2461 relocation = s390_got_offset (info) + off;
2463 /* For @GOTENT the relocation is against the offset between
2464 the instruction and the symbols entry in the GOT and not
2465 between the start of the GOT and the symbols entry. We
2466 add the vma of the GOT to get the correct value. */
2467 if ( r_type == R_390_GOTENT
2468 || r_type == R_390_GOTPLTENT)
2469 relocation += s390_got_pointer (info);
2473 case R_390_GOTOFF16:
2474 case R_390_GOTOFF32:
2475 case R_390_GOTOFF64:
2476 /* Relocation is relative to the start of the global offset
2480 && s390_is_ifunc_symbol_p (h)
2482 && !bfd_link_executable (info))
2484 relocation = (htab->elf.iplt->output_section->vma
2485 + htab->elf.iplt->output_offset
2487 - s390_got_pointer (info));
2491 relocation -= s390_got_pointer (info);
2495 case R_390_GOTPCDBL:
2496 /* Use global offset table as symbol value. */
2497 relocation = s390_got_pointer (info);
2498 unresolved_reloc = FALSE;
2501 case R_390_PLT12DBL:
2502 case R_390_PLT16DBL:
2503 case R_390_PLT24DBL:
2505 case R_390_PLT32DBL:
2507 /* Relocation is to the entry for this symbol in the
2508 procedure linkage table. */
2510 /* Resolve a PLT32 reloc against a local symbol directly,
2511 without using the procedure linkage table. */
2515 if (h->plt.offset == (bfd_vma) -1
2516 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2518 /* We didn't make a PLT entry for this symbol. This
2519 happens when statically linking PIC code, or when
2520 using -Bsymbolic. */
2523 if (s390_is_ifunc_symbol_p (h))
2524 relocation = (htab->elf.iplt->output_section->vma
2525 + htab->elf.iplt->output_offset
2528 relocation = (htab->elf.splt->output_section->vma
2529 + htab->elf.splt->output_offset
2531 unresolved_reloc = FALSE;
2534 case R_390_PLTOFF16:
2535 case R_390_PLTOFF32:
2536 case R_390_PLTOFF64:
2537 /* Relocation is to the entry for this symbol in the
2538 procedure linkage table relative to the start of the GOT. */
2540 /* For local symbols or if we didn't make a PLT entry for
2541 this symbol resolve the symbol directly. */
2543 || h->plt.offset == (bfd_vma) -1
2544 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2546 relocation -= s390_got_pointer (info);
2550 if (s390_is_ifunc_symbol_p (h))
2551 relocation = (htab->elf.iplt->output_section->vma
2552 + htab->elf.iplt->output_offset
2554 - s390_got_pointer (info));
2556 relocation = (htab->elf.splt->output_section->vma
2557 + htab->elf.splt->output_offset
2559 - s390_got_pointer (info));
2560 unresolved_reloc = FALSE;
2571 && bfd_link_pie (info)
2574 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2575 "in shared library and accessed "
2577 "(rebuild file with -fPIC ?)"),
2578 input_bfd, h->root.root.string);
2579 bfd_set_error (bfd_error_bad_value);
2582 /* The target of these relocs are instruction operands
2583 residing in read-only sections. We cannot emit a runtime
2586 && s390_is_ifunc_symbol_p (h)
2588 && bfd_link_pic (info))
2590 relocation = (htab->elf.iplt->output_section->vma
2591 + htab->elf.iplt->output_offset
2602 if ((input_section->flags & SEC_ALLOC) == 0)
2606 && s390_is_ifunc_symbol_p (h)
2609 if (!bfd_link_pic (info))
2611 /* For a non-shared object the symbol will not
2612 change. Hence we can write the address of the
2613 target IPLT slot now. */
2614 relocation = (htab->elf.iplt->output_section->vma
2615 + htab->elf.iplt->output_offset
2621 /* For shared objects a runtime relocation is needed. */
2623 Elf_Internal_Rela outrel;
2626 /* Need a dynamic relocation to get the real function
2628 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2632 if (outrel.r_offset == (bfd_vma) -1
2633 || outrel.r_offset == (bfd_vma) -2)
2636 outrel.r_offset += (input_section->output_section->vma
2637 + input_section->output_offset);
2639 if (h->dynindx == -1
2641 || bfd_link_executable (info))
2643 /* This symbol is resolved locally. */
2644 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2645 outrel.r_addend = (h->root.u.def.value
2646 + h->root.u.def.section->output_section->vma
2647 + h->root.u.def.section->output_offset);
2651 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2652 outrel.r_addend = 0;
2655 sreloc = htab->elf.irelifunc;
2656 elf_append_rela (output_bfd, sreloc, &outrel);
2658 /* If this reloc is against an external symbol, we
2659 do not want to fiddle with the addend. Otherwise,
2660 we need to include the symbol value so that it
2661 becomes an addend for the dynamic reloc. For an
2662 internal symbol, we have updated addend. */
2667 if ((bfd_link_pic (info)
2669 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2670 && !resolved_to_zero)
2671 || h->root.type != bfd_link_hash_undefweak)
2672 && ((r_type != R_390_PC16
2673 && r_type != R_390_PC12DBL
2674 && r_type != R_390_PC16DBL
2675 && r_type != R_390_PC24DBL
2676 && r_type != R_390_PC32
2677 && r_type != R_390_PC32DBL
2678 && r_type != R_390_PC64)
2679 || !SYMBOL_CALLS_LOCAL (info, h)))
2680 || (ELIMINATE_COPY_RELOCS
2681 && !bfd_link_pic (info)
2687 || h->root.type == bfd_link_hash_undefweak
2688 || h->root.type == bfd_link_hash_undefined)))
2690 Elf_Internal_Rela outrel;
2691 bfd_boolean skip, relocate;
2695 /* When generating a shared object, these relocations
2696 are copied into the output file to be resolved at run
2702 _bfd_elf_section_offset (output_bfd, info, input_section,
2704 if (outrel.r_offset == (bfd_vma) -1)
2706 else if (outrel.r_offset == (bfd_vma) -2)
2707 skip = TRUE, relocate = TRUE;
2709 outrel.r_offset += (input_section->output_section->vma
2710 + input_section->output_offset);
2713 memset (&outrel, 0, sizeof outrel);
2716 && (r_type == R_390_PC16
2717 || r_type == R_390_PC12DBL
2718 || r_type == R_390_PC16DBL
2719 || r_type == R_390_PC24DBL
2720 || r_type == R_390_PC32
2721 || r_type == R_390_PC32DBL
2722 || r_type == R_390_PC64
2723 || !bfd_link_pic (info)
2724 || !SYMBOLIC_BIND (info, h)
2725 || !h->def_regular))
2727 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2728 outrel.r_addend = rel->r_addend;
2732 /* This symbol is local, or marked to become local. */
2733 outrel.r_addend = relocation + rel->r_addend;
2734 if (r_type == R_390_64)
2737 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2743 if (bfd_is_abs_section (sec))
2745 else if (sec == NULL || sec->owner == NULL)
2747 bfd_set_error(bfd_error_bad_value);
2754 osec = sec->output_section;
2755 sindx = elf_section_data (osec)->dynindx;
2759 osec = htab->elf.text_index_section;
2760 sindx = elf_section_data (osec)->dynindx;
2762 BFD_ASSERT (sindx != 0);
2764 /* We are turning this relocation into one
2765 against a section symbol, so subtract out
2766 the output section's address but not the
2767 offset of the input section in the output
2769 outrel.r_addend -= osec->vma;
2771 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2775 sreloc = elf_section_data (input_section)->sreloc;
2779 loc = sreloc->contents;
2780 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2781 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2783 /* If this reloc is against an external symbol, we do
2784 not want to fiddle with the addend. Otherwise, we
2785 need to include the symbol value so that it becomes
2786 an addend for the dynamic reloc. */
2793 /* Relocations for tls literal pool entries. */
2794 case R_390_TLS_IE64:
2795 if (bfd_link_pic (info))
2797 Elf_Internal_Rela outrel;
2801 outrel.r_offset = rel->r_offset
2802 + input_section->output_section->vma
2803 + input_section->output_offset;
2804 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2805 sreloc = elf_section_data (input_section)->sreloc;
2808 loc = sreloc->contents;
2809 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2810 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2814 case R_390_TLS_GD64:
2815 case R_390_TLS_GOTIE64:
2816 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2817 tls_type = GOT_UNKNOWN;
2818 if (h == NULL && local_got_offsets)
2819 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2822 tls_type = elf_s390_hash_entry(h)->tls_type;
2823 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2824 r_type = R_390_TLS_LE64;
2826 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2827 r_type = R_390_TLS_IE64;
2829 if (r_type == R_390_TLS_LE64)
2831 /* This relocation gets optimized away by the local exec
2832 access optimization. */
2833 BFD_ASSERT (! unresolved_reloc);
2834 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2835 contents + rel->r_offset);
2839 if (htab->elf.sgot == NULL)
2843 off = h->got.offset;
2846 if (local_got_offsets == NULL)
2849 off = local_got_offsets[r_symndx];
2858 Elf_Internal_Rela outrel;
2862 if (htab->elf.srelgot == NULL)
2865 outrel.r_offset = (htab->elf.sgot->output_section->vma
2866 + htab->elf.sgot->output_offset + off);
2868 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2869 if (r_type == R_390_TLS_GD64)
2870 dr_type = R_390_TLS_DTPMOD;
2872 dr_type = R_390_TLS_TPOFF;
2873 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2874 outrel.r_addend = relocation - dtpoff_base (info);
2876 outrel.r_addend = 0;
2877 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2878 loc = htab->elf.srelgot->contents;
2879 loc += htab->elf.srelgot->reloc_count++
2880 * sizeof (Elf64_External_Rela);
2881 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2883 if (r_type == R_390_TLS_GD64)
2887 BFD_ASSERT (! unresolved_reloc);
2888 bfd_put_64 (output_bfd,
2889 relocation - dtpoff_base (info),
2890 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2894 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2895 outrel.r_offset += GOT_ENTRY_SIZE;
2896 outrel.r_addend = 0;
2897 htab->elf.srelgot->reloc_count++;
2898 loc += sizeof (Elf64_External_Rela);
2899 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2906 local_got_offsets[r_symndx] |= 1;
2909 if (off >= (bfd_vma) -2)
2911 if (r_type == ELF64_R_TYPE (rel->r_info))
2913 relocation = htab->elf.sgot->output_offset + off;
2914 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2915 relocation += htab->elf.sgot->output_section->vma;
2916 unresolved_reloc = FALSE;
2920 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2921 contents + rel->r_offset);
2926 case R_390_TLS_GOTIE12:
2927 case R_390_TLS_GOTIE20:
2928 case R_390_TLS_IEENT:
2931 if (local_got_offsets == NULL)
2933 off = local_got_offsets[r_symndx];
2934 if (bfd_link_pic (info))
2935 goto emit_tls_relocs;
2939 off = h->got.offset;
2940 tls_type = elf_s390_hash_entry(h)->tls_type;
2941 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2942 goto emit_tls_relocs;
2945 if (htab->elf.sgot == NULL)
2948 BFD_ASSERT (! unresolved_reloc);
2949 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2950 htab->elf.sgot->contents + off);
2951 relocation = htab->elf.sgot->output_offset + off;
2952 if (r_type == R_390_TLS_IEENT)
2953 relocation += htab->elf.sgot->output_section->vma;
2954 unresolved_reloc = FALSE;
2957 case R_390_TLS_LDM64:
2958 if (! bfd_link_pic (info))
2959 /* The literal pool entry this relocation refers to gets ignored
2960 by the optimized code of the local exec model. Do nothing
2961 and the value will turn out zero. */
2964 if (htab->elf.sgot == NULL)
2967 off = htab->tls_ldm_got.offset;
2972 Elf_Internal_Rela outrel;
2975 if (htab->elf.srelgot == NULL)
2978 outrel.r_offset = (htab->elf.sgot->output_section->vma
2979 + htab->elf.sgot->output_offset + off);
2981 bfd_put_64 (output_bfd, 0,
2982 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2983 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2984 outrel.r_addend = 0;
2985 loc = htab->elf.srelgot->contents;
2986 loc += htab->elf.srelgot->reloc_count++
2987 * sizeof (Elf64_External_Rela);
2988 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2989 htab->tls_ldm_got.offset |= 1;
2991 relocation = htab->elf.sgot->output_offset + off;
2992 unresolved_reloc = FALSE;
2995 case R_390_TLS_LE64:
2996 if (bfd_link_dll (info))
2998 /* Linking a shared library with non-fpic code requires
2999 a R_390_TLS_TPOFF relocation. */
3000 Elf_Internal_Rela outrel;
3005 outrel.r_offset = rel->r_offset
3006 + input_section->output_section->vma
3007 + input_section->output_offset;
3008 if (h != NULL && h->dynindx != -1)
3012 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3014 outrel.r_addend = relocation - dtpoff_base (info);
3016 outrel.r_addend = 0;
3017 sreloc = elf_section_data (input_section)->sreloc;
3020 loc = sreloc->contents;
3021 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3022 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3026 BFD_ASSERT (! unresolved_reloc);
3027 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3028 contents + rel->r_offset);
3032 case R_390_TLS_LDO64:
3033 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3034 relocation -= dtpoff_base (info);
3036 /* When converting LDO to LE, we must negate. */
3037 relocation = -tpoff (info, relocation);
3040 /* Relocations for tls instructions. */
3041 case R_390_TLS_LOAD:
3042 case R_390_TLS_GDCALL:
3043 case R_390_TLS_LDCALL:
3044 tls_type = GOT_UNKNOWN;
3045 if (h == NULL && local_got_offsets)
3046 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3048 tls_type = elf_s390_hash_entry(h)->tls_type;
3050 if (tls_type == GOT_TLS_GD)
3053 if (r_type == R_390_TLS_LOAD)
3055 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3057 /* IE->LE transition. Four valid cases:
3058 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3059 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3060 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3061 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3062 unsigned int insn0, insn1, ry;
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 (insn1 != 0x0004)
3068 invalid_tls_insn (input_bfd, input_section, rel);
3071 if ((insn0 & 0xff00f000) == 0xe3000000)
3072 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3073 ry = (insn0 & 0x000f0000);
3074 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3075 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3076 ry = (insn0 & 0x0000f000) << 4;
3077 else if ((insn0 & 0xff00f000) == 0xe300c000)
3078 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3079 ry = (insn0 & 0x000f0000);
3080 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3081 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3082 ry = (insn0 & 0x0000f000) << 4;
3085 invalid_tls_insn (input_bfd, input_section, rel);
3088 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3090 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3091 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3094 else if (r_type == R_390_TLS_GDCALL)
3096 unsigned int insn0, insn1;
3098 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3099 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3100 if ((insn0 & 0xffff0000) != 0xc0e50000)
3102 invalid_tls_insn (input_bfd, input_section, rel);
3105 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3107 /* GD->LE transition.
3108 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3114 /* GD->IE transition.
3115 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3119 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3120 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3122 else if (r_type == R_390_TLS_LDCALL)
3124 if (!bfd_link_pic (info))
3126 unsigned int insn0, insn1;
3128 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3129 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3130 if ((insn0 & 0xffff0000) != 0xc0e50000)
3132 invalid_tls_insn (input_bfd, input_section, rel);
3135 /* LD->LE transition.
3136 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3139 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3140 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3149 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3150 because such sections are not SEC_ALLOC and thus ld.so will
3151 not process them. */
3152 if (unresolved_reloc
3153 && !((input_section->flags & SEC_DEBUGGING) != 0
3155 && _bfd_elf_section_offset (output_bfd, info, input_section,
3156 rel->r_offset) != (bfd_vma) -1)
3158 /* xgettext:c-format */
3159 (_("%pB(%pA+%#" PRIx64 "): "
3160 "unresolvable %s relocation against symbol `%s'"),
3163 (uint64_t) rel->r_offset,
3165 h->root.root.string);
3169 /* When applying a 24 bit reloc we need to start one byte
3170 earlier. Otherwise the 32 bit get/put bfd operations might
3171 access a byte after the actual section. */
3172 if (r_type == R_390_PC24DBL
3173 || r_type == R_390_PLT24DBL)
3176 if (r_type == R_390_20
3177 || r_type == R_390_GOT20
3178 || r_type == R_390_GOTPLT20
3179 || r_type == R_390_TLS_GOTIE20)
3181 relocation += rel->r_addend;
3182 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3183 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3184 contents, rel->r_offset,
3188 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3189 contents, rel->r_offset,
3190 relocation, rel->r_addend);
3192 if (r != bfd_reloc_ok)
3197 name = h->root.root.string;
3200 name = bfd_elf_string_from_elf_section (input_bfd,
3201 symtab_hdr->sh_link,
3206 name = bfd_section_name (input_bfd, sec);
3209 if (r == bfd_reloc_overflow)
3210 (*info->callbacks->reloc_overflow)
3211 (info, (h ? &h->root : NULL), name, howto->name,
3212 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3216 /* xgettext:c-format */
3217 (_("%pB(%pA+%#" PRIx64 "): reloc against `%s': error %d"),
3218 input_bfd, input_section,
3219 (uint64_t) rel->r_offset, name, (int) r);
3228 /* Generate the PLT slots together with the dynamic relocations needed
3229 for IFUNC symbols. */
3232 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3233 struct bfd_link_info *info,
3234 struct elf_link_hash_entry *h,
3235 struct elf_s390_link_hash_table *htab,
3237 bfd_vma resolver_address)
3241 Elf_Internal_Rela rela;
3243 asection *plt, *gotplt, *relplt;
3245 if (htab->elf.iplt == NULL
3246 || htab->elf.igotplt == NULL
3247 || htab->elf.irelplt == NULL)
3250 /* Index of the PLT slot within iplt section. */
3251 plt_index = plt_offset / PLT_ENTRY_SIZE;
3252 plt = htab->elf.iplt;
3253 /* Offset into the igot.plt section. */
3254 got_offset = plt_index * GOT_ENTRY_SIZE;
3255 gotplt = htab->elf.igotplt;
3256 relplt = htab->elf.irelplt;
3258 /* Fill in the blueprint of a PLT. */
3259 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3262 /* Fixup the relative address to the GOT entry */
3263 bfd_put_32 (output_bfd,
3264 (gotplt->output_section->vma +
3265 gotplt->output_offset + got_offset
3266 - (plt->output_section->vma +
3267 plt->output_offset +
3269 plt->contents + plt_offset + 2);
3270 /* Fixup the relative branch to PLT 0 */
3271 bfd_put_32 (output_bfd, - (plt->output_offset +
3272 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3273 plt->contents + plt_offset + 24);
3274 /* Fixup offset into .rela.plt section. */
3275 bfd_put_32 (output_bfd, relplt->output_offset +
3276 plt_index * sizeof (Elf64_External_Rela),
3277 plt->contents + plt_offset + 28);
3279 /* Fill in the entry in the global offset table.
3280 Points to instruction after GOT offset. */
3281 bfd_put_64 (output_bfd,
3282 (plt->output_section->vma
3283 + plt->output_offset
3286 gotplt->contents + got_offset);
3288 /* Fill in the entry in the .rela.plt section. */
3289 rela.r_offset = (gotplt->output_section->vma
3290 + gotplt->output_offset
3295 || ((bfd_link_executable (info)
3296 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3299 /* The symbol can be locally resolved. */
3300 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3301 rela.r_addend = resolver_address;
3305 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3309 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3310 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3314 /* Finish up dynamic symbol handling. We set the contents of various
3315 dynamic sections here. */
3318 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3319 struct bfd_link_info *info,
3320 struct elf_link_hash_entry *h,
3321 Elf_Internal_Sym *sym)
3323 struct elf_s390_link_hash_table *htab;
3324 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3326 htab = elf_s390_hash_table (info);
3330 if (h->plt.offset != (bfd_vma) -1)
3333 bfd_vma gotplt_offset;
3334 Elf_Internal_Rela rela;
3337 /* This symbol has an entry in the procedure linkage table. Set
3339 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3341 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3342 htab, h->plt.offset,
3343 eh->ifunc_resolver_address +
3344 eh->ifunc_resolver_section->output_offset +
3345 eh->ifunc_resolver_section->output_section->vma);
3347 /* Do not return yet. Handling of explicit GOT slots of
3348 IFUNC symbols is below. */
3352 if (h->dynindx == -1
3353 || htab->elf.splt == NULL
3354 || htab->elf.sgotplt == NULL
3355 || htab->elf.srelplt == NULL)
3359 Current offset - size first entry / entry size. */
3360 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3362 /* The slots in the .got.plt correspond to the PLT slots in
3364 gotplt_offset = plt_index * GOT_ENTRY_SIZE;
3366 /* If .got.plt comes first it needs to contain the 3 header
3368 if (!s390_gotplt_after_got_p (info))
3369 gotplt_offset += 3 * GOT_ENTRY_SIZE;
3371 /* Fill in the blueprint of a PLT. */
3372 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3375 /* The first instruction in the PLT entry is a LARL loading
3376 the address of the GOT slot. We write the 4 byte
3377 immediate operand of the LARL instruction here. */
3378 bfd_put_32 (output_bfd,
3379 (htab->elf.sgotplt->output_section->vma +
3380 htab->elf.sgotplt->output_offset + gotplt_offset
3381 - (htab->elf.splt->output_section->vma +
3382 htab->elf.splt->output_offset +
3384 htab->elf.splt->contents + h->plt.offset + 2);
3385 /* Fixup the relative branch to PLT 0 */
3386 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3387 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3388 htab->elf.splt->contents + h->plt.offset + 24);
3389 /* Fixup offset into .rela.plt section. */
3390 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3391 htab->elf.splt->contents + h->plt.offset + 28);
3393 /* Fill in the entry in the global offset table.
3394 Points to instruction after GOT offset. */
3395 bfd_put_64 (output_bfd,
3396 (htab->elf.splt->output_section->vma
3397 + htab->elf.splt->output_offset
3400 htab->elf.sgotplt->contents + gotplt_offset);
3402 /* Fill in the entry in the .rela.plt section. */
3403 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3404 + htab->elf.sgotplt->output_offset
3406 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3408 loc = htab->elf.srelplt->contents + plt_index *
3409 sizeof (Elf64_External_Rela);
3410 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3412 if (!h->def_regular)
3414 /* Mark the symbol as undefined, rather than as defined in
3415 the .plt section. Leave the value alone. This is a clue
3416 for the dynamic linker, to make function pointer
3417 comparisons work between an application and shared
3419 sym->st_shndx = SHN_UNDEF;
3424 if (h->got.offset != (bfd_vma) -1
3425 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3426 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3427 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3429 Elf_Internal_Rela rela;
3432 /* This symbol has an entry in the global offset table. Set it
3434 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3437 rela.r_offset = (htab->elf.sgot->output_section->vma
3438 + htab->elf.sgot->output_offset
3439 + (h->got.offset &~ (bfd_vma) 1));
3441 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3443 if (bfd_link_pic (info))
3445 /* An explicit GOT slot usage needs GLOB_DAT. If the
3446 symbol references local the implicit got.iplt slot
3447 will be used and the IRELATIVE reloc has been created
3453 /* For non-shared objects explicit GOT slots must be
3454 filled with the PLT slot address for pointer
3455 equality reasons. */
3456 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3457 + htab->elf.iplt->output_offset
3459 htab->elf.sgot->contents + h->got.offset);
3463 else if (bfd_link_pic (info)
3464 && SYMBOL_REFERENCES_LOCAL (info, h))
3466 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3469 /* If this is a static link, or it is a -Bsymbolic link and
3470 the symbol is defined locally or was forced to be local
3471 because of a version file, we just want to emit a
3472 RELATIVE reloc. The entry in the global offset table
3473 will already have been initialized in the
3474 relocate_section function. */
3475 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3477 BFD_ASSERT((h->got.offset & 1) != 0);
3478 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3479 rela.r_addend = (h->root.u.def.value
3480 + h->root.u.def.section->output_section->vma
3481 + h->root.u.def.section->output_offset);
3485 BFD_ASSERT((h->got.offset & 1) == 0);
3487 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3488 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3492 loc = htab->elf.srelgot->contents;
3493 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3494 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3499 Elf_Internal_Rela rela;
3503 /* This symbols needs a copy reloc. Set it up. */
3505 if (h->dynindx == -1
3506 || (h->root.type != bfd_link_hash_defined
3507 && h->root.type != bfd_link_hash_defweak)
3508 || htab->elf.srelbss == NULL)
3511 rela.r_offset = (h->root.u.def.value
3512 + h->root.u.def.section->output_section->vma
3513 + h->root.u.def.section->output_offset);
3514 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3516 if (h->root.u.def.section == htab->elf.sdynrelro)
3517 s = htab->elf.sreldynrelro;
3519 s = htab->elf.srelbss;
3520 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3521 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3524 /* Mark some specially defined symbols as absolute. */
3525 if (h == htab->elf.hdynamic
3526 || h == htab->elf.hgot
3527 || h == htab->elf.hplt)
3528 sym->st_shndx = SHN_ABS;
3533 /* Used to decide how to sort relocs in an optimal manner for the
3534 dynamic linker, before writing them out. */
3536 static enum elf_reloc_type_class
3537 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3538 const asection *rel_sec ATTRIBUTE_UNUSED,
3539 const Elf_Internal_Rela *rela)
3541 bfd *abfd = info->output_bfd;
3542 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3543 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3544 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3545 Elf_Internal_Sym sym;
3547 if (htab->elf.dynsym == NULL
3548 || !bed->s->swap_symbol_in (abfd,
3549 (htab->elf.dynsym->contents
3550 + r_symndx * bed->s->sizeof_sym),
3554 /* Check relocation against STT_GNU_IFUNC symbol. */
3555 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3556 return reloc_class_ifunc;
3558 switch ((int) ELF64_R_TYPE (rela->r_info))
3560 case R_390_RELATIVE:
3561 return reloc_class_relative;
3562 case R_390_JMP_SLOT:
3563 return reloc_class_plt;
3565 return reloc_class_copy;
3567 return reloc_class_normal;
3571 /* Finish up the dynamic sections. */
3574 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3575 struct bfd_link_info *info)
3577 struct elf_s390_link_hash_table *htab;
3583 htab = elf_s390_hash_table (info);
3587 dynobj = htab->elf.dynobj;
3588 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3590 if (htab->elf.dynamic_sections_created)
3592 Elf64_External_Dyn *dyncon, *dynconend;
3594 if (sdyn == NULL || htab->elf.sgot == NULL)
3597 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3598 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3599 for (; dyncon < dynconend; dyncon++)
3601 Elf_Internal_Dyn dyn;
3604 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3612 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3613 dyn.d_un.d_ptr = s390_got_pointer (info);
3617 s = htab->elf.srelplt;
3618 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3622 dyn.d_un.d_val = htab->elf.srelplt->size;
3623 if (htab->elf.irelplt)
3624 dyn.d_un.d_val += htab->elf.irelplt->size;
3628 /* The procedure linkage table relocs (DT_JMPREL) should
3629 not be included in the overall relocs (DT_RELA).
3630 Therefore, we override the DT_RELASZ entry here to
3631 make it not include the JMPREL relocs. Since the
3632 linker script arranges for .rela.plt to follow all
3633 other relocation sections, we don't have to worry
3634 about changing the DT_RELA entry. */
3635 dyn.d_un.d_val -= htab->elf.srelplt->size;
3636 if (htab->elf.irelplt)
3637 dyn.d_un.d_val -= htab->elf.irelplt->size;
3641 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3644 /* Fill in the special first entry in the procedure linkage table. */
3645 if (htab->elf.splt && htab->elf.splt->size > 0)
3647 /* fill in blueprint for plt 0 entry */
3648 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3649 PLT_FIRST_ENTRY_SIZE);
3650 /* The second instruction in the first PLT entry is a LARL
3651 loading the GOT pointer. Fill in the LARL immediate
3653 bfd_put_32 (output_bfd,
3654 (s390_got_pointer (info)
3655 - htab->elf.splt->output_section->vma
3656 - htab->elf.splt->output_offset - 6)/2,
3657 htab->elf.splt->contents + 8);
3659 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3660 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3664 if (htab->elf.hgot && htab->elf.hgot->root.u.def.section)
3666 /* Fill in the first three entries in the global offset table. */
3667 if (htab->elf.hgot->root.u.def.section->size > 0)
3669 bfd_put_64 (output_bfd,
3670 (sdyn == NULL ? (bfd_vma) 0
3671 : sdyn->output_section->vma + sdyn->output_offset),
3672 htab->elf.hgot->root.u.def.section->contents);
3673 /* One entry for shared object struct ptr. */
3674 bfd_put_64 (output_bfd, (bfd_vma) 0,
3675 htab->elf.hgot->root.u.def.section->contents + 8);
3676 /* One entry for _dl_runtime_resolve. */
3677 bfd_put_64 (output_bfd, (bfd_vma) 0,
3678 htab->elf.hgot->root.u.def.section->contents + 16);
3680 elf_section_data (htab->elf.sgot->output_section)
3681 ->this_hdr.sh_entsize = 8;
3684 /* Finish dynamic symbol for local IFUNC symbols. */
3685 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3687 struct plt_entry *local_plt;
3688 Elf_Internal_Sym *isym;
3689 Elf_Internal_Shdr *symtab_hdr;
3691 symtab_hdr = &elf_symtab_hdr (ibfd);
3693 if (!is_s390_elf (ibfd))
3696 local_plt = elf_s390_local_plt (ibfd);
3697 if (local_plt != NULL)
3698 for (i = 0; i < symtab_hdr->sh_info; i++)
3700 if (local_plt[i].plt.offset != (bfd_vma) -1)
3702 asection *sec = local_plt[i].sec;
3703 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3707 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3708 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3709 local_plt[i].plt.offset,
3711 + sec->output_section->vma
3712 + sec->output_offset);
3721 /* Support for core dump NOTE sections. */
3724 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3729 switch (note->descsz)
3734 case 336: /* sizeof(struct elf_prstatus) on s390x */
3736 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3739 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3747 /* Make a ".reg/999" section. */
3748 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3749 size, note->descpos + offset);
3753 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3755 switch (note->descsz)
3760 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3761 elf_tdata (abfd)->core->pid
3762 = bfd_get_32 (abfd, note->descdata + 24);
3763 elf_tdata (abfd)->core->program
3764 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3765 elf_tdata (abfd)->core->command
3766 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3769 /* Note that for some reason, a spurious space is tacked
3770 onto the end of the args in some (at least one anyway)
3771 implementations, so strip it off if it exists. */
3774 char *command = elf_tdata (abfd)->core->command;
3775 int n = strlen (command);
3777 if (0 < n && command[n - 1] == ' ')
3778 command[n - 1] = '\0';
3785 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3797 char data[136] ATTRIBUTE_NONSTRING = { 0 };
3798 const char *fname, *psargs;
3800 va_start (ap, note_type);
3801 fname = va_arg (ap, const char *);
3802 psargs = va_arg (ap, const char *);
3805 strncpy (data + 40, fname, 16);
3806 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3808 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3809 -Wstringop-truncation:
3810 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3812 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION;
3814 strncpy (data + 56, psargs, 80);
3815 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3818 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3819 &data, sizeof (data));
3824 char data[336] = { 0 };
3829 va_start (ap, note_type);
3830 pid = va_arg (ap, long);
3831 cursig = va_arg (ap, int);
3832 gregs = va_arg (ap, const void *);
3835 bfd_put_16 (abfd, cursig, data + 12);
3836 bfd_put_32 (abfd, pid, data + 32);
3837 memcpy (data + 112, gregs, 216);
3838 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3839 &data, sizeof (data));
3845 /* Return address for Ith PLT stub in section PLT, for relocation REL
3846 or (bfd_vma) -1 if it should not be included. */
3849 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3850 const arelent *rel ATTRIBUTE_UNUSED)
3852 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3855 /* Merge backend specific data from an object file to the output
3856 object file when linking. */
3859 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3861 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3864 return elf_s390_merge_obj_attributes (ibfd, info);
3867 /* We may add a PT_S390_PGSTE program header. */
3870 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3871 struct bfd_link_info *info)
3873 struct elf_s390_link_hash_table *htab;
3877 htab = elf_s390_hash_table (info);
3879 return htab->params->pgste;
3885 /* Add the PT_S390_PGSTE program header. */
3888 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3890 struct elf_s390_link_hash_table *htab;
3891 struct elf_segment_map *m, *pm = NULL;
3896 htab = elf_s390_hash_table (info);
3897 if (!htab || !htab->params->pgste)
3900 /* If there is already a PT_S390_PGSTE header, avoid adding
3902 m = elf_seg_map (abfd);
3903 while (m && m->p_type != PT_S390_PGSTE)
3912 m = (struct elf_segment_map *)
3913 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3916 m->p_type = PT_S390_PGSTE;
3926 bfd_elf_s390_set_options (struct bfd_link_info *info,
3927 struct s390_elf_params *params)
3929 struct elf_s390_link_hash_table *htab;
3933 htab = elf_s390_hash_table (info);
3935 htab->params = params;
3942 /* Why was the hash table entry size definition changed from
3943 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3944 this is the only reason for the s390_elf64_size_info structure. */
3946 const struct elf_size_info s390_elf64_size_info =
3948 sizeof (Elf64_External_Ehdr),
3949 sizeof (Elf64_External_Phdr),
3950 sizeof (Elf64_External_Shdr),
3951 sizeof (Elf64_External_Rel),
3952 sizeof (Elf64_External_Rela),
3953 sizeof (Elf64_External_Sym),
3954 sizeof (Elf64_External_Dyn),
3955 sizeof (Elf_External_Note),
3956 8, /* hash-table entry size. */
3957 1, /* internal relocations per external relocations. */
3958 64, /* arch_size. */
3959 3, /* log_file_align. */
3960 ELFCLASS64, EV_CURRENT,
3961 bfd_elf64_write_out_phdrs,
3962 bfd_elf64_write_shdrs_and_ehdr,
3963 bfd_elf64_checksum_contents,
3964 bfd_elf64_write_relocs,
3965 bfd_elf64_swap_symbol_in,
3966 bfd_elf64_swap_symbol_out,
3967 bfd_elf64_slurp_reloc_table,
3968 bfd_elf64_slurp_symbol_table,
3969 bfd_elf64_swap_dyn_in,
3970 bfd_elf64_swap_dyn_out,
3971 bfd_elf64_swap_reloc_in,
3972 bfd_elf64_swap_reloc_out,
3973 bfd_elf64_swap_reloca_in,
3974 bfd_elf64_swap_reloca_out
3977 #define TARGET_BIG_SYM s390_elf64_vec
3978 #define TARGET_BIG_NAME "elf64-s390"
3979 #define ELF_ARCH bfd_arch_s390
3980 #define ELF_TARGET_ID S390_ELF_DATA
3981 #define ELF_MACHINE_CODE EM_S390
3982 #define ELF_MACHINE_ALT1 EM_S390_OLD
3983 #define ELF_MAXPAGESIZE 0x1000
3985 #define elf_backend_size_info s390_elf64_size_info
3987 #define elf_backend_can_gc_sections 1
3988 #define elf_backend_can_refcount 1
3989 #define elf_backend_want_got_plt 1
3990 #define elf_backend_plt_readonly 1
3991 #define elf_backend_want_plt_sym 0
3992 #define elf_backend_got_header_size 24
3993 #define elf_backend_want_dynrelro 1
3994 #define elf_backend_rela_normal 1
3996 #define elf_info_to_howto elf_s390_info_to_howto
3998 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3999 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4000 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4001 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4002 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4004 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4005 #define elf_backend_check_relocs elf_s390_check_relocs
4006 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4007 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4008 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4009 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4010 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4011 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4012 #define elf_backend_relocate_section elf_s390_relocate_section
4013 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4014 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4015 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4016 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4017 #define elf_backend_write_core_note elf_s390_write_core_note
4018 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4019 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4020 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4021 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4023 #define bfd_elf64_mkobject elf_s390_mkobject
4024 #define elf_backend_object_p elf_s390_object_p
4026 #include "elf64-target.h"