1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2017 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 ATTRIBUTE_UNUSED,
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;
329 static reloc_howto_type *
330 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
336 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
338 if (elf_howto_table[i].name != NULL
339 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
340 return &elf_howto_table[i];
342 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
343 return &elf64_s390_vtinherit_howto;
344 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
345 return &elf64_s390_vtentry_howto;
350 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
351 and elf64-s390.c has its own copy. */
354 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
356 Elf_Internal_Rela *dst)
358 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
361 case R_390_GNU_VTINHERIT:
362 cache_ptr->howto = &elf64_s390_vtinherit_howto;
365 case R_390_GNU_VTENTRY:
366 cache_ptr->howto = &elf64_s390_vtentry_howto;
370 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
372 /* xgettext:c-format */
373 _bfd_error_handler (_("%B: invalid relocation type %d"),
377 cache_ptr->howto = &elf_howto_table[r_type];
381 /* A relocation function which doesn't do anything. */
382 static bfd_reloc_status_type
383 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
384 arelent *reloc_entry,
385 asymbol *symbol ATTRIBUTE_UNUSED,
386 void * data ATTRIBUTE_UNUSED,
387 asection *input_section,
389 char **error_message ATTRIBUTE_UNUSED)
392 reloc_entry->address += input_section->output_offset;
396 /* Handle the large displacement relocs. */
397 static bfd_reloc_status_type
398 s390_elf_ldisp_reloc (bfd *abfd,
399 arelent *reloc_entry,
402 asection *input_section,
404 char **error_message ATTRIBUTE_UNUSED)
406 reloc_howto_type *howto = reloc_entry->howto;
410 if (output_bfd != (bfd *) NULL
411 && (symbol->flags & BSF_SECTION_SYM) == 0
412 && (! howto->partial_inplace
413 || reloc_entry->addend == 0))
415 reloc_entry->address += input_section->output_offset;
418 if (output_bfd != NULL)
419 return bfd_reloc_continue;
421 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
422 return bfd_reloc_outofrange;
424 relocation = (symbol->value
425 + symbol->section->output_section->vma
426 + symbol->section->output_offset);
427 relocation += reloc_entry->addend;
428 if (howto->pc_relative)
430 relocation -= (input_section->output_section->vma
431 + input_section->output_offset);
432 relocation -= reloc_entry->address;
435 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
436 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
437 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
439 if ((bfd_signed_vma) relocation < - 0x80000
440 || (bfd_signed_vma) relocation > 0x7ffff)
441 return bfd_reloc_overflow;
447 elf_s390_is_local_label_name (bfd *abfd, const char *name)
449 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
452 return _bfd_elf_is_local_label_name (abfd, name);
455 /* Functions for the 390 ELF linker. */
457 /* The name of the dynamic interpreter. This is put in the .interp
460 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
462 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
463 copying dynamic variables from a shared lib into an app's dynbss
464 section, and instead use a dynamic relocation to point into the
466 #define ELIMINATE_COPY_RELOCS 1
468 /* The size in bytes of the first entry in the procedure linkage table. */
469 #define PLT_FIRST_ENTRY_SIZE 32
470 /* The size in bytes of an entry in the procedure linkage table. */
471 #define PLT_ENTRY_SIZE 32
473 #define GOT_ENTRY_SIZE 8
475 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
477 /* The first three entries in a procedure linkage table are reserved,
478 and the initial contents are unimportant (we zero them out).
479 Subsequent entries look like this. See the SVR4 ABI 386
480 supplement to see how this works. */
482 /* For the s390, simple addr offset can only be 0 - 4096.
483 To use the full 16777216 TB address space, several instructions
484 are needed to load an address in a register and execute
485 a branch( or just saving the address)
487 Furthermore, only r 0 and 1 are free to use!!! */
489 /* The first 3 words in the GOT are then reserved.
490 Word 0 is the address of the dynamic table.
491 Word 1 is a pointer to a structure describing the object
492 Word 2 is used to point to the loader entry address.
494 The code for PLT entries looks like this:
496 The GOT holds the address in the PLT to be executed.
497 The loader then gets:
498 48(15) = Pointer to the structure describing the object.
499 56(15) = Offset in symbol table
500 The loader must then find the module where the function is
501 and insert the address in the GOT.
503 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
504 LG 1,0(1) # 6 bytes Load address from GOT in r1
505 BCR 15,1 # 2 bytes Jump to address
506 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
507 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
508 BRCL 15,-x # 6 bytes Jump to start of PLT
509 .long ? # 4 bytes offset into .rela.plt
511 Total = 32 bytes per PLT entry
512 Fixup at offset 2: relative address to GOT entry
513 Fixup at offset 22: relative branch to PLT0
514 Fixup at offset 28: 32 bit offset into .rela.plt
516 A 32 bit offset into the symbol table is enough. It allows for
517 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
518 object (the main program, any shared library) is limited to 4GB in
519 size. Having a .rela.plt of 2GB would already make the .plt
520 section bigger than 8GB. */
522 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
524 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
525 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
526 0x07, 0xf1, /* br %r1 */
527 0x0d, 0x10, /* basr %r1,%r0 */
528 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
529 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
530 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
533 /* The first PLT entry pushes the offset into the symbol table
534 from R1 onto the stack at 56(15) and the loader object info
535 at 48(15), loads the loader address in R1 and jumps to it. */
537 /* The first entry in the PLT:
540 STG 1,56(15) # r1 contains the offset into the symbol table
541 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
542 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
543 LG 1,16(1) # get entry address of loader
544 BCR 15,1 # jump to loader
546 Fixup at offset 8: relative address to start of GOT. */
548 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
550 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
551 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
552 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
553 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
554 0x07, 0xf1, /* br %r1 */
555 0x07, 0x00, /* nopr %r0 */
556 0x07, 0x00, /* nopr %r0 */
557 0x07, 0x00 /* nopr %r0 */
561 /* s390 ELF linker hash entry. */
563 struct elf_s390_link_hash_entry
565 struct elf_link_hash_entry elf;
567 /* Track dynamic relocs copied for this symbol. */
568 struct elf_dyn_relocs *dyn_relocs;
570 /* Number of GOTPLT references for a function. */
571 bfd_signed_vma gotplt_refcount;
573 #define GOT_UNKNOWN 0
577 #define GOT_TLS_IE_NLT 3
578 unsigned char tls_type;
580 /* For pointer equality reasons we might need to change the symbol
581 type from STT_GNU_IFUNC to STT_FUNC together with its value and
582 section entry. So after alloc_dynrelocs only these values should
583 be used. In order to check whether a symbol is IFUNC use
584 s390_is_ifunc_symbol_p. */
585 bfd_vma ifunc_resolver_address;
586 asection *ifunc_resolver_section;
589 #define elf_s390_hash_entry(ent) \
590 ((struct elf_s390_link_hash_entry *)(ent))
592 /* This structure represents an entry in the local PLT list needed for
593 local IFUNC symbols. */
596 /* The section of the local symbol.
597 Set in relocate_section and used in finish_dynamic_sections. */
602 bfd_signed_vma refcount;
607 /* NOTE: Keep this structure in sync with
608 the one declared in elf32-s390.c. */
609 struct elf_s390_obj_tdata
611 struct elf_obj_tdata root;
613 /* A local PLT is needed for ifunc symbols. */
614 struct plt_entry *local_plt;
616 /* TLS type for each local got entry. */
617 char *local_got_tls_type;
620 #define elf_s390_tdata(abfd) \
621 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
623 #define elf_s390_local_plt(abfd) \
624 (elf_s390_tdata (abfd)->local_plt)
626 #define elf_s390_local_got_tls_type(abfd) \
627 (elf_s390_tdata (abfd)->local_got_tls_type)
629 #define is_s390_elf(bfd) \
630 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
631 && elf_tdata (bfd) != NULL \
632 && elf_object_id (bfd) == S390_ELF_DATA)
635 elf_s390_mkobject (bfd *abfd)
637 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
642 elf_s390_object_p (bfd *abfd)
644 /* Set the right machine number for an s390 elf32 file. */
645 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
648 /* s390 ELF linker hash table. */
650 struct elf_s390_link_hash_table
652 struct elf_link_hash_table elf;
654 /* Short-cuts to get to dynamic linker sections. */
658 bfd_signed_vma refcount;
662 /* Small local sym cache. */
663 struct sym_cache sym_cache;
665 /* Options passed from the linker. */
666 struct s390_elf_params *params;
669 /* Get the s390 ELF linker hash table from a link_info structure. */
671 #define elf_s390_hash_table(p) \
672 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
673 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
676 #include "elf-s390-common.c"
678 /* Create an entry in an s390 ELF linker hash table. */
680 static struct bfd_hash_entry *
681 link_hash_newfunc (struct bfd_hash_entry *entry,
682 struct bfd_hash_table *table,
685 /* Allocate the structure if it has not already been allocated by a
689 entry = bfd_hash_allocate (table,
690 sizeof (struct elf_s390_link_hash_entry));
695 /* Call the allocation method of the superclass. */
696 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
699 struct elf_s390_link_hash_entry *eh;
701 eh = (struct elf_s390_link_hash_entry *) entry;
702 eh->dyn_relocs = NULL;
703 eh->gotplt_refcount = 0;
704 eh->tls_type = GOT_UNKNOWN;
705 eh->ifunc_resolver_address = 0;
706 eh->ifunc_resolver_section = NULL;
712 /* Create an s390 ELF linker hash table. */
714 static struct bfd_link_hash_table *
715 elf_s390_link_hash_table_create (bfd *abfd)
717 struct elf_s390_link_hash_table *ret;
718 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
720 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
724 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
725 sizeof (struct elf_s390_link_hash_entry),
732 return &ret->elf.root;
735 /* Copy the extra info we tack onto an elf_link_hash_entry. */
738 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
739 struct elf_link_hash_entry *dir,
740 struct elf_link_hash_entry *ind)
742 struct elf_s390_link_hash_entry *edir, *eind;
744 edir = (struct elf_s390_link_hash_entry *) dir;
745 eind = (struct elf_s390_link_hash_entry *) ind;
747 if (eind->dyn_relocs != NULL)
749 if (edir->dyn_relocs != NULL)
751 struct elf_dyn_relocs **pp;
752 struct elf_dyn_relocs *p;
754 /* Add reloc counts against the indirect sym to the direct sym
755 list. Merge any entries against the same section. */
756 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
758 struct elf_dyn_relocs *q;
760 for (q = edir->dyn_relocs; q != NULL; q = q->next)
761 if (q->sec == p->sec)
763 q->pc_count += p->pc_count;
764 q->count += p->count;
771 *pp = edir->dyn_relocs;
774 edir->dyn_relocs = eind->dyn_relocs;
775 eind->dyn_relocs = NULL;
778 if (ind->root.type == bfd_link_hash_indirect
779 && dir->got.refcount <= 0)
781 edir->tls_type = eind->tls_type;
782 eind->tls_type = GOT_UNKNOWN;
785 if (ELIMINATE_COPY_RELOCS
786 && ind->root.type != bfd_link_hash_indirect
787 && dir->dynamic_adjusted)
789 /* If called to transfer flags for a weakdef during processing
790 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
791 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
792 if (dir->versioned != versioned_hidden)
793 dir->ref_dynamic |= ind->ref_dynamic;
794 dir->ref_regular |= ind->ref_regular;
795 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
796 dir->needs_plt |= ind->needs_plt;
799 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
803 elf_s390_tls_transition (struct bfd_link_info *info,
807 if (bfd_link_pic (info))
815 return R_390_TLS_LE64;
816 return R_390_TLS_IE64;
817 case R_390_TLS_GOTIE64:
819 return R_390_TLS_LE64;
820 return R_390_TLS_GOTIE64;
821 case R_390_TLS_LDM64:
822 return R_390_TLS_LE64;
828 /* Look through the relocs for a section during the first phase, and
829 allocate space in the global offset table or procedure linkage
833 elf_s390_check_relocs (bfd *abfd,
834 struct bfd_link_info *info,
836 const Elf_Internal_Rela *relocs)
838 struct elf_s390_link_hash_table *htab;
839 Elf_Internal_Shdr *symtab_hdr;
840 struct elf_link_hash_entry **sym_hashes;
841 const Elf_Internal_Rela *rel;
842 const Elf_Internal_Rela *rel_end;
844 bfd_signed_vma *local_got_refcounts;
845 int tls_type, old_tls_type;
847 if (bfd_link_relocatable (info))
850 BFD_ASSERT (is_s390_elf (abfd));
852 htab = elf_s390_hash_table (info);
856 symtab_hdr = &elf_symtab_hdr (abfd);
857 sym_hashes = elf_sym_hashes (abfd);
858 local_got_refcounts = elf_local_got_refcounts (abfd);
862 rel_end = relocs + sec->reloc_count;
863 for (rel = relocs; rel < rel_end; rel++)
866 unsigned int r_symndx;
867 struct elf_link_hash_entry *h;
868 Elf_Internal_Sym *isym;
870 r_symndx = ELF64_R_SYM (rel->r_info);
872 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
874 /* xgettext:c-format */
875 _bfd_error_handler (_("%B: bad symbol index: %d"),
880 if (r_symndx < symtab_hdr->sh_info)
882 /* A local symbol. */
883 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
888 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
890 struct plt_entry *plt;
892 if (htab->elf.dynobj == NULL)
893 htab->elf.dynobj = abfd;
895 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
898 if (local_got_refcounts == NULL)
900 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
902 local_got_refcounts = elf_local_got_refcounts (abfd);
904 plt = elf_s390_local_plt (abfd);
905 plt[r_symndx].plt.refcount++;
911 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
912 while (h->root.type == bfd_link_hash_indirect
913 || h->root.type == bfd_link_hash_warning)
914 h = (struct elf_link_hash_entry *) h->root.u.i.link;
917 /* Create got section and local_got_refcounts array if they
919 r_type = elf_s390_tls_transition (info,
920 ELF64_R_TYPE (rel->r_info),
935 case R_390_GOTPLTENT:
937 case R_390_TLS_GOTIE12:
938 case R_390_TLS_GOTIE20:
939 case R_390_TLS_GOTIE64:
940 case R_390_TLS_IEENT:
942 case R_390_TLS_LDM64:
944 && local_got_refcounts == NULL)
946 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
948 local_got_refcounts = elf_local_got_refcounts (abfd);
957 if (htab->elf.sgot == NULL)
959 if (htab->elf.dynobj == NULL)
960 htab->elf.dynobj = abfd;
961 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
968 if (htab->elf.dynobj == NULL)
969 htab->elf.dynobj = abfd;
970 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
973 /* Make sure an IFUNC symbol defined in a non-shared object
974 always gets a PLT slot. */
975 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
977 /* The symbol is called by the dynamic loader in order
978 to resolve the relocation. So it is in fact also
989 /* These relocs do not need a GOT slot. They just load the
990 GOT pointer itself or address something else relative to
991 the GOT. Since the GOT pointer has been set up above we
997 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1001 case R_390_PLT12DBL:
1002 case R_390_PLT16DBL:
1003 case R_390_PLT24DBL:
1005 case R_390_PLT32DBL:
1007 case R_390_PLTOFF16:
1008 case R_390_PLTOFF32:
1009 case R_390_PLTOFF64:
1010 /* This symbol requires a procedure linkage table entry. We
1011 actually build the entry in adjust_dynamic_symbol,
1012 because this might be a case of linking PIC code which is
1013 never referenced by a dynamic object, in which case we
1014 don't need to generate a procedure linkage table entry
1017 /* If this is a local symbol, we resolve it directly without
1018 creating a procedure linkage table entry. */
1022 h->plt.refcount += 1;
1026 case R_390_GOTPLT12:
1027 case R_390_GOTPLT16:
1028 case R_390_GOTPLT20:
1029 case R_390_GOTPLT32:
1030 case R_390_GOTPLT64:
1031 case R_390_GOTPLTENT:
1032 /* This symbol requires either a procedure linkage table entry
1033 or an entry in the local got. We actually build the entry
1034 in adjust_dynamic_symbol because whether this is really a
1035 global reference can change and with it the fact if we have
1036 to create a plt entry or a local got entry. To be able to
1037 make a once global symbol a local one we have to keep track
1038 of the number of gotplt references that exist for this
1042 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1044 h->plt.refcount += 1;
1047 local_got_refcounts[r_symndx] += 1;
1050 case R_390_TLS_LDM64:
1051 htab->tls_ldm_got.refcount += 1;
1054 case R_390_TLS_IE64:
1055 case R_390_TLS_GOTIE12:
1056 case R_390_TLS_GOTIE20:
1057 case R_390_TLS_GOTIE64:
1058 case R_390_TLS_IEENT:
1059 if (bfd_link_pic (info))
1060 info->flags |= DF_STATIC_TLS;
1069 case R_390_TLS_GD64:
1070 /* This symbol requires a global offset table entry. */
1079 tls_type = GOT_NORMAL;
1081 case R_390_TLS_GD64:
1082 tls_type = GOT_TLS_GD;
1084 case R_390_TLS_IE64:
1085 case R_390_TLS_GOTIE64:
1086 tls_type = GOT_TLS_IE;
1088 case R_390_TLS_GOTIE12:
1089 case R_390_TLS_GOTIE20:
1090 case R_390_TLS_IEENT:
1091 tls_type = GOT_TLS_IE_NLT;
1097 h->got.refcount += 1;
1098 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1102 local_got_refcounts[r_symndx] += 1;
1103 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1105 /* If a TLS symbol is accessed using IE at least once,
1106 there is no point to use dynamic model for it. */
1107 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1109 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1112 /* xgettext:c-format */
1113 (_("%B: `%s' accessed both as normal and thread local symbol"),
1114 abfd, h->root.root.string);
1117 if (old_tls_type > tls_type)
1118 tls_type = old_tls_type;
1121 if (old_tls_type != tls_type)
1124 elf_s390_hash_entry (h)->tls_type = tls_type;
1126 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1129 if (r_type != R_390_TLS_IE64)
1133 case R_390_TLS_LE64:
1134 /* For static linking and executables this reloc will be
1135 calculated at linktime otherwise a TLS_TPOFF runtime
1136 reloc will be generated. */
1137 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1140 if (!bfd_link_pic (info))
1142 info->flags |= DF_STATIC_TLS;
1156 if (h != NULL && bfd_link_executable (info))
1158 /* If this reloc is in a read-only section, we might
1159 need a copy reloc. We can't check reliably at this
1160 stage whether the section is read-only, as input
1161 sections have not yet been mapped to output sections.
1162 Tentatively set the flag for now, and correct in
1163 adjust_dynamic_symbol. */
1166 if (!bfd_link_pic (info))
1168 /* We may need a .plt entry if the function this reloc
1169 refers to is in a shared lib. */
1170 h->plt.refcount += 1;
1174 /* If we are creating a shared library, and this is a reloc
1175 against a global symbol, or a non PC relative reloc
1176 against a local symbol, then we need to copy the reloc
1177 into the shared library. However, if we are linking with
1178 -Bsymbolic, we do not need to copy a reloc against a
1179 global symbol which is defined in an object we are
1180 including in the link (i.e., DEF_REGULAR is set). At
1181 this point we have not seen all the input files, so it is
1182 possible that DEF_REGULAR is not set now but will be set
1183 later (it is never cleared). In case of a weak definition,
1184 DEF_REGULAR may be cleared later by a strong definition in
1185 a shared library. We account for that possibility below by
1186 storing information in the relocs_copied field of the hash
1187 table entry. A similar situation occurs when creating
1188 shared libraries and symbol visibility changes render the
1191 If on the other hand, we are creating an executable, we
1192 may need to keep relocations for symbols satisfied by a
1193 dynamic library if we manage to avoid copy relocs for the
1195 if ((bfd_link_pic (info)
1196 && (sec->flags & SEC_ALLOC) != 0
1197 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1198 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1199 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1200 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1201 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1203 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1205 && (! SYMBOLIC_BIND (info, h)
1206 || h->root.type == bfd_link_hash_defweak
1207 || !h->def_regular))))
1208 || (ELIMINATE_COPY_RELOCS
1209 && !bfd_link_pic (info)
1210 && (sec->flags & SEC_ALLOC) != 0
1212 && (h->root.type == bfd_link_hash_defweak
1213 || !h->def_regular)))
1215 struct elf_dyn_relocs *p;
1216 struct elf_dyn_relocs **head;
1218 /* We must copy these reloc types into the output file.
1219 Create a reloc section in dynobj and make room for
1223 if (htab->elf.dynobj == NULL)
1224 htab->elf.dynobj = abfd;
1226 sreloc = _bfd_elf_make_dynamic_reloc_section
1227 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1233 /* If this is a global symbol, we count the number of
1234 relocations we need for this symbol. */
1237 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1241 /* Track dynamic relocs needed for local syms too.
1242 We really need local syms available to do this
1247 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1252 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1256 vpp = &elf_section_data (s)->local_dynrel;
1257 head = (struct elf_dyn_relocs **) vpp;
1261 if (p == NULL || p->sec != sec)
1263 bfd_size_type amt = sizeof *p;
1264 p = ((struct elf_dyn_relocs *)
1265 bfd_alloc (htab->elf.dynobj, amt));
1276 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1277 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1278 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1279 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1280 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1282 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1287 /* This relocation describes the C++ object vtable hierarchy.
1288 Reconstruct it for later use during GC. */
1289 case R_390_GNU_VTINHERIT:
1290 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1294 /* This relocation describes which C++ vtable entries are actually
1295 used. Record for later use during GC. */
1296 case R_390_GNU_VTENTRY:
1297 BFD_ASSERT (h != NULL);
1299 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1311 /* Return the section that should be marked against GC for a given
1315 elf_s390_gc_mark_hook (asection *sec,
1316 struct bfd_link_info *info,
1317 Elf_Internal_Rela *rel,
1318 struct elf_link_hash_entry *h,
1319 Elf_Internal_Sym *sym)
1322 switch (ELF64_R_TYPE (rel->r_info))
1324 case R_390_GNU_VTINHERIT:
1325 case R_390_GNU_VTENTRY:
1329 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1332 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1333 entry but we found we will not create any. Called when we find we will
1334 not have any PLT for this symbol, by for example
1335 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1336 or elf_s390_size_dynamic_sections if no dynamic sections will be
1337 created (we're only linking static objects). */
1340 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1342 if (h->elf.root.type == bfd_link_hash_warning)
1343 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1345 if (h->gotplt_refcount <= 0)
1348 /* We simply add the number of gotplt references to the number
1349 * of got references for this symbol. */
1350 h->elf.got.refcount += h->gotplt_refcount;
1351 h->gotplt_refcount = -1;
1354 /* Find dynamic relocs for H that apply to read-only sections. */
1357 readonly_dynrelocs (struct elf_link_hash_entry *h)
1359 struct elf_dyn_relocs *p;
1361 for (p = elf_s390_hash_entry (h)->dyn_relocs; p != NULL; p = p->next)
1363 asection *s = p->sec->output_section;
1365 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1371 /* Adjust a symbol defined by a dynamic object and referenced by a
1372 regular object. The current definition is in some section of the
1373 dynamic object, but we're not including those sections. We have to
1374 change the definition to something the rest of the link can
1378 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1379 struct elf_link_hash_entry *h)
1381 struct elf_s390_link_hash_table *htab;
1384 /* STT_GNU_IFUNC symbol must go through PLT. */
1385 if (s390_is_ifunc_symbol_p (h))
1387 /* All local STT_GNU_IFUNC references must be treated as local
1388 calls via local PLT. */
1389 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1391 bfd_size_type pc_count = 0, count = 0;
1392 struct elf_dyn_relocs **pp;
1393 struct elf_s390_link_hash_entry *eh;
1394 struct elf_dyn_relocs *p;
1396 eh = (struct elf_s390_link_hash_entry *) h;
1397 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1399 pc_count += p->pc_count;
1400 p->count -= p->pc_count;
1409 if (pc_count || count)
1413 if (h->plt.refcount <= 0)
1414 h->plt.refcount = 1;
1416 h->plt.refcount += 1;
1420 if (h->plt.refcount <= 0)
1422 h->plt.offset = (bfd_vma) -1;
1428 /* If this is a function, put it in the procedure linkage table. We
1429 will fill in the contents of the procedure linkage table later
1430 (although we could actually do it here). */
1431 if (h->type == STT_FUNC
1434 if (h->plt.refcount <= 0
1435 || SYMBOL_CALLS_LOCAL (info, h)
1436 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1438 /* This case can occur if we saw a PLT32 reloc in an input
1439 file, but the symbol was never referred to by a dynamic
1440 object, or if all references were garbage collected. In
1441 such a case, we don't actually need to build a procedure
1442 linkage table, and we can just do a PC32 reloc instead. */
1443 h->plt.offset = (bfd_vma) -1;
1445 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1451 /* It's possible that we incorrectly decided a .plt reloc was
1452 needed for an R_390_PC32 reloc to a non-function sym in
1453 check_relocs. We can't decide accurately between function and
1454 non-function syms in check-relocs; Objects loaded later in
1455 the link may change h->type. So fix it now. */
1456 h->plt.offset = (bfd_vma) -1;
1458 /* If this is a weak symbol, and there is a real definition, the
1459 processor independent code will have arranged for us to see the
1460 real definition first, and we can just use the same value. */
1461 if (h->is_weakalias)
1463 struct elf_link_hash_entry *def = weakdef (h);
1464 BFD_ASSERT (def->root.type == bfd_link_hash_defined);
1465 h->root.u.def.section = def->root.u.def.section;
1466 h->root.u.def.value = def->root.u.def.value;
1467 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1468 h->non_got_ref = def->non_got_ref;
1472 /* This is a reference to a symbol defined by a dynamic object which
1473 is not a function. */
1475 /* If we are creating a shared library, we must presume that the
1476 only references to the symbol are via the global offset table.
1477 For such cases we need not do anything here; the relocations will
1478 be handled correctly by relocate_section. */
1479 if (bfd_link_pic (info))
1482 /* If there are no references to this symbol that do not use the
1483 GOT, we don't need to generate a copy reloc. */
1484 if (!h->non_got_ref)
1487 /* If -z nocopyreloc was given, we won't generate them either. */
1488 if (info->nocopyreloc)
1494 /* If we don't find any dynamic relocs in read-only sections, then
1495 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1496 if (ELIMINATE_COPY_RELOCS && !readonly_dynrelocs (h))
1502 /* We must allocate the symbol in our .dynbss section, which will
1503 become part of the .bss section of the executable. There will be
1504 an entry for this symbol in the .dynsym section. The dynamic
1505 object will contain position independent code, so all references
1506 from the dynamic object to this symbol will go through the global
1507 offset table. The dynamic linker will use the .dynsym entry to
1508 determine the address it must put in the global offset table, so
1509 both the dynamic object and the regular object will refer to the
1510 same memory location for the variable. */
1512 htab = elf_s390_hash_table (info);
1516 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1517 copy the initial value out of the dynamic object and into the
1518 runtime process image. */
1519 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1521 s = htab->elf.sdynrelro;
1522 srel = htab->elf.sreldynrelro;
1526 s = htab->elf.sdynbss;
1527 srel = htab->elf.srelbss;
1529 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1531 srel->size += sizeof (Elf64_External_Rela);
1535 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1538 /* Allocate space in .plt, .got and associated reloc sections for
1542 allocate_dynrelocs (struct elf_link_hash_entry *h,
1545 struct bfd_link_info *info;
1546 struct elf_s390_link_hash_table *htab;
1547 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1548 struct elf_dyn_relocs *p;
1550 if (h->root.type == bfd_link_hash_indirect)
1553 info = (struct bfd_link_info *) inf;
1554 htab = elf_s390_hash_table (info);
1558 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1559 here if it is defined and referenced in a non-shared object. */
1560 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1561 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1562 else if (htab->elf.dynamic_sections_created
1563 && h->plt.refcount > 0)
1565 /* Make sure this symbol is output as a dynamic symbol.
1566 Undefined weak syms won't yet be marked as dynamic. */
1567 if (h->dynindx == -1
1568 && !h->forced_local)
1570 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1574 if (bfd_link_pic (info)
1575 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1577 asection *s = htab->elf.splt;
1579 /* If this is the first .plt entry, make room for the special
1582 s->size += PLT_FIRST_ENTRY_SIZE;
1584 h->plt.offset = s->size;
1586 /* If this symbol is not defined in a regular file, and we are
1587 not generating a shared library, then set the symbol to this
1588 location in the .plt. This is required to make function
1589 pointers compare as equal between the normal executable and
1590 the shared library. */
1591 if (! bfd_link_pic (info)
1594 h->root.u.def.section = s;
1595 h->root.u.def.value = h->plt.offset;
1598 /* Make room for this entry. */
1599 s->size += PLT_ENTRY_SIZE;
1601 /* We also need to make an entry in the .got.plt section, which
1602 will be placed in the .got section by the linker script. */
1603 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1605 /* We also need to make an entry in the .rela.plt section. */
1606 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1610 h->plt.offset = (bfd_vma) -1;
1612 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1617 h->plt.offset = (bfd_vma) -1;
1619 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1622 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1623 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1624 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1625 we can save the dynamic TLS relocation. */
1626 if (h->got.refcount > 0
1627 && !bfd_link_pic (info)
1629 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1631 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1632 /* For the GOTIE access without a literal pool entry the offset has
1633 to be stored somewhere. The immediate value in the instruction
1634 is not bit enough so the value is stored in the got. */
1636 h->got.offset = htab->elf.sgot->size;
1637 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1640 h->got.offset = (bfd_vma) -1;
1642 else if (h->got.refcount > 0)
1646 int tls_type = elf_s390_hash_entry(h)->tls_type;
1648 /* Make sure this symbol is output as a dynamic symbol.
1649 Undefined weak syms won't yet be marked as dynamic. */
1650 if (h->dynindx == -1
1651 && !h->forced_local)
1653 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1658 h->got.offset = s->size;
1659 s->size += GOT_ENTRY_SIZE;
1660 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1661 if (tls_type == GOT_TLS_GD)
1662 s->size += GOT_ENTRY_SIZE;
1663 dyn = htab->elf.dynamic_sections_created;
1664 /* R_390_TLS_IE64 needs one dynamic relocation,
1665 R_390_TLS_GD64 needs one if local symbol and two if global. */
1666 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1667 || tls_type >= GOT_TLS_IE)
1668 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1669 else if (tls_type == GOT_TLS_GD)
1670 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1671 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info, h)
1672 && (bfd_link_pic (info)
1673 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1674 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1677 h->got.offset = (bfd_vma) -1;
1679 if (eh->dyn_relocs == NULL)
1682 /* In the shared -Bsymbolic case, discard space allocated for
1683 dynamic pc-relative relocs against symbols which turn out to be
1684 defined in regular objects. For the normal shared case, discard
1685 space for pc-relative relocs that have become local due to symbol
1686 visibility changes. */
1688 if (bfd_link_pic (info))
1690 if (SYMBOL_CALLS_LOCAL (info, h))
1692 struct elf_dyn_relocs **pp;
1694 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1696 p->count -= p->pc_count;
1705 /* Also discard relocs on undefined weak syms with non-default
1707 if (eh->dyn_relocs != NULL
1708 && h->root.type == bfd_link_hash_undefweak)
1710 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1711 || UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
1712 eh->dyn_relocs = NULL;
1714 /* Make sure undefined weak symbols are output as a dynamic
1716 else if (h->dynindx == -1
1717 && !h->forced_local)
1719 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1724 else if (ELIMINATE_COPY_RELOCS)
1726 /* For the non-shared case, discard space for relocs against
1727 symbols which turn out to need copy relocs or are not
1733 || (htab->elf.dynamic_sections_created
1734 && (h->root.type == bfd_link_hash_undefweak
1735 || h->root.type == bfd_link_hash_undefined))))
1737 /* Make sure this symbol is output as a dynamic symbol.
1738 Undefined weak syms won't yet be marked as dynamic. */
1739 if (h->dynindx == -1
1740 && !h->forced_local)
1742 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1746 /* If that succeeded, we know we'll be keeping all the
1748 if (h->dynindx != -1)
1752 eh->dyn_relocs = NULL;
1757 /* Finally, allocate space. */
1758 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1760 asection *sreloc = elf_section_data (p->sec)->sreloc;
1761 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1767 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1768 read-only sections. */
1771 maybe_set_textrel (struct elf_link_hash_entry *h, void *info_p)
1775 if (h->root.type == bfd_link_hash_indirect)
1778 sec = readonly_dynrelocs (h);
1781 struct bfd_link_info *info = (struct bfd_link_info *) info_p;
1783 info->flags |= DF_TEXTREL;
1784 info->callbacks->minfo
1785 (_("%B: dynamic relocation against `%T' in read-only section `%A'\n"),
1786 sec->owner, h->root.root.string, sec);
1788 /* Not an error, just cut short the traversal. */
1794 /* Set the sizes of the dynamic sections. */
1797 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1798 struct bfd_link_info *info)
1800 struct elf_s390_link_hash_table *htab;
1806 htab = elf_s390_hash_table (info);
1810 dynobj = htab->elf.dynobj;
1814 if (htab->elf.dynamic_sections_created)
1816 /* Set the contents of the .interp section to the interpreter. */
1817 if (bfd_link_executable (info) && !info->nointerp)
1819 s = bfd_get_linker_section (dynobj, ".interp");
1822 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1823 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
1827 /* Set up .got offsets for local syms, and space for local dynamic
1829 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
1831 bfd_signed_vma *local_got;
1832 bfd_signed_vma *end_local_got;
1833 char *local_tls_type;
1834 bfd_size_type locsymcount;
1835 Elf_Internal_Shdr *symtab_hdr;
1837 struct plt_entry *local_plt;
1840 if (! is_s390_elf (ibfd))
1843 for (s = ibfd->sections; s != NULL; s = s->next)
1845 struct elf_dyn_relocs *p;
1847 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
1849 if (!bfd_is_abs_section (p->sec)
1850 && bfd_is_abs_section (p->sec->output_section))
1852 /* Input section has been discarded, either because
1853 it is a copy of a linkonce section or due to
1854 linker script /DISCARD/, so we'll be discarding
1857 else if (p->count != 0)
1859 srela = elf_section_data (p->sec)->sreloc;
1860 srela->size += p->count * sizeof (Elf64_External_Rela);
1861 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
1862 info->flags |= DF_TEXTREL;
1867 local_got = elf_local_got_refcounts (ibfd);
1871 symtab_hdr = &elf_symtab_hdr (ibfd);
1872 locsymcount = symtab_hdr->sh_info;
1873 end_local_got = local_got + locsymcount;
1874 local_tls_type = elf_s390_local_got_tls_type (ibfd);
1876 srela = htab->elf.srelgot;
1877 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
1881 *local_got = s->size;
1882 s->size += GOT_ENTRY_SIZE;
1883 if (*local_tls_type == GOT_TLS_GD)
1884 s->size += GOT_ENTRY_SIZE;
1885 if (bfd_link_pic (info))
1886 srela->size += sizeof (Elf64_External_Rela);
1889 *local_got = (bfd_vma) -1;
1892 local_plt = elf_s390_local_plt (ibfd);
1893 for (i = 0; i < symtab_hdr->sh_info; i++)
1895 if (local_plt[i].plt.refcount > 0)
1897 local_plt[i].plt.offset = htab->elf.iplt->size;
1898 htab->elf.iplt->size += PLT_ENTRY_SIZE;
1899 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
1900 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
1903 local_plt[i].plt.offset = (bfd_vma) -1;
1907 if (htab->tls_ldm_got.refcount > 0)
1909 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1911 htab->tls_ldm_got.offset = htab->elf.sgot->size;
1912 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
1913 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1916 htab->tls_ldm_got.offset = -1;
1918 /* Allocate global sym .plt and .got entries, and space for global
1919 sym dynamic relocs. */
1920 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
1922 /* We now have determined the sizes of the various dynamic sections.
1923 Allocate memory for them. */
1925 for (s = dynobj->sections; s != NULL; s = s->next)
1927 if ((s->flags & SEC_LINKER_CREATED) == 0)
1930 if (s == htab->elf.splt
1931 || s == htab->elf.sgot
1932 || s == htab->elf.sgotplt
1933 || s == htab->elf.sdynbss
1934 || s == htab->elf.sdynrelro
1935 || s == htab->elf.iplt
1936 || s == htab->elf.igotplt
1937 || s == htab->irelifunc)
1939 /* Strip this section if we don't need it; see the
1942 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
1944 if (s->size != 0 && s != htab->elf.srelplt)
1947 /* We use the reloc_count field as a counter if we need
1948 to copy relocs into the output file. */
1953 /* It's not one of our sections, so don't allocate space. */
1959 /* If we don't need this section, strip it from the
1960 output file. This is to handle .rela.bss and
1961 .rela.plt. We must create it in
1962 create_dynamic_sections, because it must be created
1963 before the linker maps input sections to output
1964 sections. The linker does that before
1965 adjust_dynamic_symbol is called, and it is that
1966 function which decides whether anything needs to go
1967 into these sections. */
1969 s->flags |= SEC_EXCLUDE;
1973 if ((s->flags & SEC_HAS_CONTENTS) == 0)
1976 /* Allocate memory for the section contents. We use bfd_zalloc
1977 here in case unused entries are not reclaimed before the
1978 section's contents are written out. This should not happen,
1979 but this way if it does, we get a R_390_NONE reloc instead
1981 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
1982 if (s->contents == NULL)
1986 if (htab->elf.dynamic_sections_created)
1988 /* Add some entries to the .dynamic section. We fill in the
1989 values later, in elf_s390_finish_dynamic_sections, but we
1990 must add the entries now so that we get the correct size for
1991 the .dynamic section. The DT_DEBUG entry is filled in by the
1992 dynamic linker and used by the debugger. */
1993 #define add_dynamic_entry(TAG, VAL) \
1994 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
1996 if (bfd_link_executable (info))
1998 if (!add_dynamic_entry (DT_DEBUG, 0))
2002 if (htab->elf.splt->size != 0)
2004 if (!add_dynamic_entry (DT_PLTGOT, 0)
2005 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2006 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2007 || !add_dynamic_entry (DT_JMPREL, 0))
2013 if (!add_dynamic_entry (DT_RELA, 0)
2014 || !add_dynamic_entry (DT_RELASZ, 0)
2015 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2018 /* If any dynamic relocs apply to a read-only section,
2019 then we need a DT_TEXTREL entry. */
2020 if ((info->flags & DF_TEXTREL) == 0)
2021 elf_link_hash_traverse (&htab->elf, maybe_set_textrel, info);
2023 if ((info->flags & DF_TEXTREL) != 0)
2025 if (!add_dynamic_entry (DT_TEXTREL, 0))
2030 #undef add_dynamic_entry
2035 /* Return the base VMA address which should be subtracted from real addresses
2036 when resolving @dtpoff relocation.
2037 This is PT_TLS segment p_vaddr. */
2040 dtpoff_base (struct bfd_link_info *info)
2042 /* If tls_sec is NULL, we should have signalled an error already. */
2043 if (elf_hash_table (info)->tls_sec == NULL)
2045 return elf_hash_table (info)->tls_sec->vma;
2048 /* Return the relocation value for @tpoff relocation
2049 if STT_TLS virtual address is ADDRESS. */
2052 tpoff (struct bfd_link_info *info, bfd_vma address)
2054 struct elf_link_hash_table *htab = elf_hash_table (info);
2056 /* If tls_sec is NULL, we should have signalled an error already. */
2057 if (htab->tls_sec == NULL)
2059 return htab->tls_size + htab->tls_sec->vma - address;
2062 /* Complain if TLS instruction relocation is against an invalid
2066 invalid_tls_insn (bfd *input_bfd,
2067 asection *input_section,
2068 Elf_Internal_Rela *rel)
2070 reloc_howto_type *howto;
2072 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2074 /* xgettext:c-format */
2075 (_("%B(%A+%#Lx): invalid instruction for TLS relocation %s"),
2080 bfd_set_error (bfd_error_bad_value);
2083 /* Relocate a 390 ELF section. */
2086 elf_s390_relocate_section (bfd *output_bfd,
2087 struct bfd_link_info *info,
2089 asection *input_section,
2091 Elf_Internal_Rela *relocs,
2092 Elf_Internal_Sym *local_syms,
2093 asection **local_sections)
2095 struct elf_s390_link_hash_table *htab;
2096 Elf_Internal_Shdr *symtab_hdr;
2097 struct elf_link_hash_entry **sym_hashes;
2098 bfd_vma *local_got_offsets;
2099 Elf_Internal_Rela *rel;
2100 Elf_Internal_Rela *relend;
2102 BFD_ASSERT (is_s390_elf (input_bfd));
2104 htab = elf_s390_hash_table (info);
2108 symtab_hdr = &elf_symtab_hdr (input_bfd);
2109 sym_hashes = elf_sym_hashes (input_bfd);
2110 local_got_offsets = elf_local_got_offsets (input_bfd);
2113 relend = relocs + input_section->reloc_count;
2114 for (; rel < relend; rel++)
2116 unsigned int r_type;
2117 reloc_howto_type *howto;
2118 unsigned long r_symndx;
2119 struct elf_link_hash_entry *h;
2120 Elf_Internal_Sym *sym;
2124 bfd_boolean unresolved_reloc;
2125 bfd_reloc_status_type r;
2127 asection *base_got = htab->elf.sgot;
2128 bfd_boolean resolved_to_zero;
2130 r_type = ELF64_R_TYPE (rel->r_info);
2131 if (r_type == (int) R_390_GNU_VTINHERIT
2132 || r_type == (int) R_390_GNU_VTENTRY)
2134 if (r_type >= (int) R_390_max)
2136 bfd_set_error (bfd_error_bad_value);
2140 howto = elf_howto_table + r_type;
2141 r_symndx = ELF64_R_SYM (rel->r_info);
2146 unresolved_reloc = FALSE;
2147 if (r_symndx < symtab_hdr->sh_info)
2149 sym = local_syms + r_symndx;
2150 sec = local_sections[r_symndx];
2152 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2154 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2155 if (local_plt == NULL)
2158 /* Address of the PLT slot. */
2159 relocation = (htab->elf.iplt->output_section->vma
2160 + htab->elf.iplt->output_offset
2161 + local_plt[r_symndx].plt.offset);
2165 case R_390_PLTOFF16:
2166 case R_390_PLTOFF32:
2167 case R_390_PLTOFF64:
2168 relocation -= htab->elf.sgot->output_section->vma;
2170 case R_390_GOTPLT12:
2171 case R_390_GOTPLT16:
2172 case R_390_GOTPLT20:
2173 case R_390_GOTPLT32:
2174 case R_390_GOTPLT64:
2175 case R_390_GOTPLTENT:
2183 /* Write the PLT slot address into the GOT slot. */
2184 bfd_put_64 (output_bfd, relocation,
2185 htab->elf.sgot->contents +
2186 local_got_offsets[r_symndx]);
2187 relocation = (local_got_offsets[r_symndx] +
2188 htab->elf.sgot->output_offset);
2190 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2191 relocation += htab->elf.sgot->output_section->vma;
2197 /* The output section is needed later in
2198 finish_dynamic_section when creating the dynamic
2200 local_plt[r_symndx].sec = sec;
2204 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2208 bfd_boolean warned ATTRIBUTE_UNUSED;
2209 bfd_boolean ignored ATTRIBUTE_UNUSED;
2211 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2212 r_symndx, symtab_hdr, sym_hashes,
2214 unresolved_reloc, warned, ignored);
2217 if (sec != NULL && discarded_section (sec))
2218 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2219 rel, 1, relend, howto, 0, contents);
2221 if (bfd_link_relocatable (info))
2224 resolved_to_zero = (h != NULL
2225 && UNDEFWEAK_NO_DYNAMIC_RELOC (info, h));
2229 case R_390_GOTPLT12:
2230 case R_390_GOTPLT16:
2231 case R_390_GOTPLT20:
2232 case R_390_GOTPLT32:
2233 case R_390_GOTPLT64:
2234 case R_390_GOTPLTENT:
2235 /* There are three cases for a GOTPLT relocation. 1) The
2236 relocation is against the jump slot entry of a plt that
2237 will get emitted to the output file. 2) The relocation
2238 is against the jump slot of a plt entry that has been
2239 removed. elf_s390_adjust_gotplt has created a GOT entry
2240 as replacement. 3) The relocation is against a local symbol.
2241 Cases 2) and 3) are the same as the GOT relocation code
2242 so we just have to test for case 1 and fall through for
2244 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2248 if (s390_is_ifunc_symbol_p (h))
2250 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2251 relocation = (plt_index * GOT_ENTRY_SIZE +
2252 htab->elf.igotplt->output_offset);
2253 if (r_type == R_390_GOTPLTENT)
2254 relocation += htab->elf.igotplt->output_section->vma;
2259 Current offset - size first entry / entry size. */
2260 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2263 /* Offset in GOT is PLT index plus GOT headers(3)
2264 times 8, addr & GOT addr. */
2265 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2266 if (r_type == R_390_GOTPLTENT)
2267 relocation += htab->elf.sgot->output_section->vma;
2269 unresolved_reloc = FALSE;
2280 /* Relocation is to the entry for this symbol in the global
2282 if (base_got == NULL)
2289 off = h->got.offset;
2290 dyn = htab->elf.dynamic_sections_created;
2292 if (s390_is_ifunc_symbol_p (h))
2294 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2295 if (off == (bfd_vma)-1)
2297 /* No explicit GOT usage so redirect to the
2299 base_got = htab->elf.igotplt;
2300 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2304 /* Explicit GOT slots must contain the address
2305 of the PLT slot. This will be handled in
2306 finish_dynamic_symbol. */
2309 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2310 bfd_link_pic (info),
2312 || (bfd_link_pic (info)
2313 && SYMBOL_REFERENCES_LOCAL (info, h))
2314 || resolved_to_zero)
2316 /* This is actually a static link, or it is a
2317 -Bsymbolic link and the symbol is defined
2318 locally, or the symbol was forced to be local
2319 because of a version file. We must initialize
2320 this entry in the global offset table. Since the
2321 offset must always be a multiple of 2, we use the
2322 least significant bit to record whether we have
2323 initialized it already.
2325 When doing a dynamic link, we create a .rel.got
2326 relocation entry to initialize the value. This
2327 is done in the finish_dynamic_symbol routine. */
2332 bfd_put_64 (output_bfd, relocation,
2333 base_got->contents + off);
2338 && bfd_link_pic (info)
2339 && SYMBOL_REFERENCES_LOCAL (info, h))
2340 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2341 && ((r_type == R_390_GOTENT
2342 && (bfd_get_16 (input_bfd,
2343 contents + rel->r_offset - 2)
2344 & 0xff0f) == 0xc408)
2345 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2346 || (r_type == R_390_GOT20
2347 && (bfd_get_32 (input_bfd,
2348 contents + rel->r_offset - 2)
2349 & 0xff00f000) == 0xe300c000
2350 && bfd_get_8 (input_bfd,
2351 contents + rel->r_offset + 3) == 0x04)))
2354 unsigned short new_insn =
2355 (0xc000 | (bfd_get_8 (input_bfd,
2356 contents + rel->r_offset - 1) & 0xf0));
2357 bfd_put_16 (output_bfd, new_insn,
2358 contents + rel->r_offset - 2);
2359 r_type = R_390_PC32DBL;
2361 howto = elf_howto_table + r_type;
2362 relocation = h->root.u.def.value
2363 + h->root.u.def.section->output_section->vma
2364 + h->root.u.def.section->output_offset;
2369 unresolved_reloc = FALSE;
2373 if (local_got_offsets == NULL)
2376 off = local_got_offsets[r_symndx];
2378 /* The offset must always be a multiple of 8. We use
2379 the least significant bit to record whether we have
2380 already generated the necessary reloc. */
2385 bfd_put_64 (output_bfd, relocation,
2386 htab->elf.sgot->contents + off);
2388 if (bfd_link_pic (info))
2391 Elf_Internal_Rela outrel;
2394 s = htab->elf.srelgot;
2398 outrel.r_offset = (htab->elf.sgot->output_section->vma
2399 + htab->elf.sgot->output_offset
2401 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2402 outrel.r_addend = relocation;
2404 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2405 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2408 local_got_offsets[r_symndx] |= 1;
2412 if (off >= (bfd_vma) -2)
2415 relocation = base_got->output_offset + off;
2417 /* For @GOTENT the relocation is against the offset between
2418 the instruction and the symbols entry in the GOT and not
2419 between the start of the GOT and the symbols entry. We
2420 add the vma of the GOT to get the correct value. */
2421 if ( r_type == R_390_GOTENT
2422 || r_type == R_390_GOTPLTENT)
2423 relocation += base_got->output_section->vma;
2427 case R_390_GOTOFF16:
2428 case R_390_GOTOFF32:
2429 case R_390_GOTOFF64:
2430 /* Relocation is relative to the start of the global offset
2434 && s390_is_ifunc_symbol_p (h)
2436 && !bfd_link_executable (info))
2438 relocation = (htab->elf.iplt->output_section->vma
2439 + htab->elf.iplt->output_offset
2441 - htab->elf.sgot->output_section->vma);
2445 /* Note that sgot->output_offset is not involved in this
2446 calculation. We always want the start of .got. If we
2447 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2448 permitted by the ABI, we might have to change this
2450 relocation -= htab->elf.sgot->output_section->vma;
2454 case R_390_GOTPCDBL:
2455 /* Use global offset table as symbol value. */
2456 relocation = htab->elf.sgot->output_section->vma;
2457 unresolved_reloc = FALSE;
2460 case R_390_PLT12DBL:
2461 case R_390_PLT16DBL:
2462 case R_390_PLT24DBL:
2464 case R_390_PLT32DBL:
2466 /* Relocation is to the entry for this symbol in the
2467 procedure linkage table. */
2469 /* Resolve a PLT32 reloc against a local symbol directly,
2470 without using the procedure linkage table. */
2474 if (h->plt.offset == (bfd_vma) -1
2475 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2477 /* We didn't make a PLT entry for this symbol. This
2478 happens when statically linking PIC code, or when
2479 using -Bsymbolic. */
2482 if (s390_is_ifunc_symbol_p (h))
2483 relocation = (htab->elf.iplt->output_section->vma
2484 + htab->elf.iplt->output_offset
2487 relocation = (htab->elf.splt->output_section->vma
2488 + htab->elf.splt->output_offset
2490 unresolved_reloc = FALSE;
2493 case R_390_PLTOFF16:
2494 case R_390_PLTOFF32:
2495 case R_390_PLTOFF64:
2496 /* Relocation is to the entry for this symbol in the
2497 procedure linkage table relative to the start of the GOT. */
2499 /* For local symbols or if we didn't make a PLT entry for
2500 this symbol resolve the symbol directly. */
2502 || h->plt.offset == (bfd_vma) -1
2503 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2505 relocation -= htab->elf.sgot->output_section->vma;
2509 if (s390_is_ifunc_symbol_p (h))
2510 relocation = (htab->elf.iplt->output_section->vma
2511 + htab->elf.iplt->output_offset
2513 - htab->elf.sgot->output_section->vma);
2515 relocation = (htab->elf.splt->output_section->vma
2516 + htab->elf.splt->output_offset
2518 - htab->elf.sgot->output_section->vma);
2519 unresolved_reloc = FALSE;
2530 && bfd_link_pie (info)
2533 _bfd_error_handler (_("%B: `%s' non-PLT reloc for symbol defined "
2534 "in shared library and accessed "
2536 "(rebuild file with -fPIC ?)"),
2537 input_bfd, h->root.root.string);
2538 bfd_set_error (bfd_error_bad_value);
2541 /* The target of these relocs are instruction operands
2542 residing in read-only sections. We cannot emit a runtime
2545 && s390_is_ifunc_symbol_p (h)
2547 && bfd_link_pic (info))
2549 relocation = (htab->elf.iplt->output_section->vma
2550 + htab->elf.iplt->output_offset
2562 && s390_is_ifunc_symbol_p (h)
2565 if (!bfd_link_pic (info))
2567 /* For a non-shared object the symbol will not
2568 change. Hence we can write the address of the
2569 target IPLT slot now. */
2570 relocation = (htab->elf.iplt->output_section->vma
2571 + htab->elf.iplt->output_offset
2577 /* For shared objects a runtime relocation is needed. */
2579 Elf_Internal_Rela outrel;
2582 /* Need a dynamic relocation to get the real function
2584 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2588 if (outrel.r_offset == (bfd_vma) -1
2589 || outrel.r_offset == (bfd_vma) -2)
2592 outrel.r_offset += (input_section->output_section->vma
2593 + input_section->output_offset);
2595 if (h->dynindx == -1
2597 || bfd_link_executable (info))
2599 /* This symbol is resolved locally. */
2600 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2601 outrel.r_addend = (h->root.u.def.value
2602 + h->root.u.def.section->output_section->vma
2603 + h->root.u.def.section->output_offset);
2607 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2608 outrel.r_addend = 0;
2611 sreloc = htab->elf.irelifunc;
2612 elf_append_rela (output_bfd, sreloc, &outrel);
2614 /* If this reloc is against an external symbol, we
2615 do not want to fiddle with the addend. Otherwise,
2616 we need to include the symbol value so that it
2617 becomes an addend for the dynamic reloc. For an
2618 internal symbol, we have updated addend. */
2623 if ((input_section->flags & SEC_ALLOC) == 0)
2626 if ((bfd_link_pic (info)
2628 || (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2629 && !resolved_to_zero)
2630 || h->root.type != bfd_link_hash_undefweak)
2631 && ((r_type != R_390_PC16
2632 && r_type != R_390_PC12DBL
2633 && r_type != R_390_PC16DBL
2634 && r_type != R_390_PC24DBL
2635 && r_type != R_390_PC32
2636 && r_type != R_390_PC32DBL
2637 && r_type != R_390_PC64)
2638 || !SYMBOL_CALLS_LOCAL (info, h)))
2639 || (ELIMINATE_COPY_RELOCS
2640 && !bfd_link_pic (info)
2646 || h->root.type == bfd_link_hash_undefweak
2647 || h->root.type == bfd_link_hash_undefined)))
2649 Elf_Internal_Rela outrel;
2650 bfd_boolean skip, relocate;
2654 /* When generating a shared object, these relocations
2655 are copied into the output file to be resolved at run
2661 _bfd_elf_section_offset (output_bfd, info, input_section,
2663 if (outrel.r_offset == (bfd_vma) -1)
2665 else if (outrel.r_offset == (bfd_vma) -2)
2666 skip = TRUE, relocate = TRUE;
2668 outrel.r_offset += (input_section->output_section->vma
2669 + input_section->output_offset);
2672 memset (&outrel, 0, sizeof outrel);
2675 && (r_type == R_390_PC16
2676 || r_type == R_390_PC12DBL
2677 || r_type == R_390_PC16DBL
2678 || r_type == R_390_PC24DBL
2679 || r_type == R_390_PC32
2680 || r_type == R_390_PC32DBL
2681 || r_type == R_390_PC64
2682 || !bfd_link_pic (info)
2683 || !SYMBOLIC_BIND (info, h)
2684 || !h->def_regular))
2686 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2687 outrel.r_addend = rel->r_addend;
2691 /* This symbol is local, or marked to become local. */
2692 outrel.r_addend = relocation + rel->r_addend;
2693 if (r_type == R_390_64)
2696 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2702 if (bfd_is_abs_section (sec))
2704 else if (sec == NULL || sec->owner == NULL)
2706 bfd_set_error(bfd_error_bad_value);
2713 osec = sec->output_section;
2714 sindx = elf_section_data (osec)->dynindx;
2718 osec = htab->elf.text_index_section;
2719 sindx = elf_section_data (osec)->dynindx;
2721 BFD_ASSERT (sindx != 0);
2723 /* We are turning this relocation into one
2724 against a section symbol, so subtract out
2725 the output section's address but not the
2726 offset of the input section in the output
2728 outrel.r_addend -= osec->vma;
2730 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2734 sreloc = elf_section_data (input_section)->sreloc;
2738 loc = sreloc->contents;
2739 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2740 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2742 /* If this reloc is against an external symbol, we do
2743 not want to fiddle with the addend. Otherwise, we
2744 need to include the symbol value so that it becomes
2745 an addend for the dynamic reloc. */
2752 /* Relocations for tls literal pool entries. */
2753 case R_390_TLS_IE64:
2754 if (bfd_link_pic (info))
2756 Elf_Internal_Rela outrel;
2760 outrel.r_offset = rel->r_offset
2761 + input_section->output_section->vma
2762 + input_section->output_offset;
2763 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2764 sreloc = elf_section_data (input_section)->sreloc;
2767 loc = sreloc->contents;
2768 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2769 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2773 case R_390_TLS_GD64:
2774 case R_390_TLS_GOTIE64:
2775 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2776 tls_type = GOT_UNKNOWN;
2777 if (h == NULL && local_got_offsets)
2778 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2781 tls_type = elf_s390_hash_entry(h)->tls_type;
2782 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2783 r_type = R_390_TLS_LE64;
2785 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2786 r_type = R_390_TLS_IE64;
2788 if (r_type == R_390_TLS_LE64)
2790 /* This relocation gets optimized away by the local exec
2791 access optimization. */
2792 BFD_ASSERT (! unresolved_reloc);
2793 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2794 contents + rel->r_offset);
2798 if (htab->elf.sgot == NULL)
2802 off = h->got.offset;
2805 if (local_got_offsets == NULL)
2808 off = local_got_offsets[r_symndx];
2817 Elf_Internal_Rela outrel;
2821 if (htab->elf.srelgot == NULL)
2824 outrel.r_offset = (htab->elf.sgot->output_section->vma
2825 + htab->elf.sgot->output_offset + off);
2827 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2828 if (r_type == R_390_TLS_GD64)
2829 dr_type = R_390_TLS_DTPMOD;
2831 dr_type = R_390_TLS_TPOFF;
2832 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2833 outrel.r_addend = relocation - dtpoff_base (info);
2835 outrel.r_addend = 0;
2836 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2837 loc = htab->elf.srelgot->contents;
2838 loc += htab->elf.srelgot->reloc_count++
2839 * sizeof (Elf64_External_Rela);
2840 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2842 if (r_type == R_390_TLS_GD64)
2846 BFD_ASSERT (! unresolved_reloc);
2847 bfd_put_64 (output_bfd,
2848 relocation - dtpoff_base (info),
2849 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2853 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
2854 outrel.r_offset += GOT_ENTRY_SIZE;
2855 outrel.r_addend = 0;
2856 htab->elf.srelgot->reloc_count++;
2857 loc += sizeof (Elf64_External_Rela);
2858 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2865 local_got_offsets[r_symndx] |= 1;
2868 if (off >= (bfd_vma) -2)
2870 if (r_type == ELF64_R_TYPE (rel->r_info))
2872 relocation = htab->elf.sgot->output_offset + off;
2873 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
2874 relocation += htab->elf.sgot->output_section->vma;
2875 unresolved_reloc = FALSE;
2879 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
2880 contents + rel->r_offset);
2885 case R_390_TLS_GOTIE12:
2886 case R_390_TLS_GOTIE20:
2887 case R_390_TLS_IEENT:
2890 if (local_got_offsets == NULL)
2892 off = local_got_offsets[r_symndx];
2893 if (bfd_link_pic (info))
2894 goto emit_tls_relocs;
2898 off = h->got.offset;
2899 tls_type = elf_s390_hash_entry(h)->tls_type;
2900 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
2901 goto emit_tls_relocs;
2904 if (htab->elf.sgot == NULL)
2907 BFD_ASSERT (! unresolved_reloc);
2908 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2909 htab->elf.sgot->contents + off);
2910 relocation = htab->elf.sgot->output_offset + off;
2911 if (r_type == R_390_TLS_IEENT)
2912 relocation += htab->elf.sgot->output_section->vma;
2913 unresolved_reloc = FALSE;
2916 case R_390_TLS_LDM64:
2917 if (! bfd_link_pic (info))
2918 /* The literal pool entry this relocation refers to gets ignored
2919 by the optimized code of the local exec model. Do nothing
2920 and the value will turn out zero. */
2923 if (htab->elf.sgot == NULL)
2926 off = htab->tls_ldm_got.offset;
2931 Elf_Internal_Rela outrel;
2934 if (htab->elf.srelgot == NULL)
2937 outrel.r_offset = (htab->elf.sgot->output_section->vma
2938 + htab->elf.sgot->output_offset + off);
2940 bfd_put_64 (output_bfd, 0,
2941 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
2942 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
2943 outrel.r_addend = 0;
2944 loc = htab->elf.srelgot->contents;
2945 loc += htab->elf.srelgot->reloc_count++
2946 * sizeof (Elf64_External_Rela);
2947 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2948 htab->tls_ldm_got.offset |= 1;
2950 relocation = htab->elf.sgot->output_offset + off;
2951 unresolved_reloc = FALSE;
2954 case R_390_TLS_LE64:
2955 if (bfd_link_dll (info))
2957 /* Linking a shared library with non-fpic code requires
2958 a R_390_TLS_TPOFF relocation. */
2959 Elf_Internal_Rela outrel;
2964 outrel.r_offset = rel->r_offset
2965 + input_section->output_section->vma
2966 + input_section->output_offset;
2967 if (h != NULL && h->dynindx != -1)
2971 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
2973 outrel.r_addend = relocation - dtpoff_base (info);
2975 outrel.r_addend = 0;
2976 sreloc = elf_section_data (input_section)->sreloc;
2979 loc = sreloc->contents;
2980 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2981 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2985 BFD_ASSERT (! unresolved_reloc);
2986 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2987 contents + rel->r_offset);
2991 case R_390_TLS_LDO64:
2992 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
2993 relocation -= dtpoff_base (info);
2995 /* When converting LDO to LE, we must negate. */
2996 relocation = -tpoff (info, relocation);
2999 /* Relocations for tls instructions. */
3000 case R_390_TLS_LOAD:
3001 case R_390_TLS_GDCALL:
3002 case R_390_TLS_LDCALL:
3003 tls_type = GOT_UNKNOWN;
3004 if (h == NULL && local_got_offsets)
3005 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3007 tls_type = elf_s390_hash_entry(h)->tls_type;
3009 if (tls_type == GOT_TLS_GD)
3012 if (r_type == R_390_TLS_LOAD)
3014 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3016 /* IE->LE transition. Four valid cases:
3017 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3018 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3019 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3020 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3021 unsigned int insn0, insn1, ry;
3023 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3024 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3025 if (insn1 != 0x0004)
3027 invalid_tls_insn (input_bfd, input_section, rel);
3030 if ((insn0 & 0xff00f000) == 0xe3000000)
3031 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3032 ry = (insn0 & 0x000f0000);
3033 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3034 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3035 ry = (insn0 & 0x0000f000) << 4;
3036 else if ((insn0 & 0xff00f000) == 0xe300c000)
3037 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3038 ry = (insn0 & 0x000f0000);
3039 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3040 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3041 ry = (insn0 & 0x0000f000) << 4;
3044 invalid_tls_insn (input_bfd, input_section, rel);
3047 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3049 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3050 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3053 else if (r_type == R_390_TLS_GDCALL)
3055 unsigned int insn0, insn1;
3057 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3058 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3059 if ((insn0 & 0xffff0000) != 0xc0e50000)
3061 invalid_tls_insn (input_bfd, input_section, rel);
3064 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3066 /* GD->LE transition.
3067 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3073 /* GD->IE transition.
3074 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3078 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3079 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3081 else if (r_type == R_390_TLS_LDCALL)
3083 if (!bfd_link_pic (info))
3085 unsigned int insn0, insn1;
3087 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3088 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3089 if ((insn0 & 0xffff0000) != 0xc0e50000)
3091 invalid_tls_insn (input_bfd, input_section, rel);
3094 /* LD->LE transition.
3095 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3098 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3099 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3108 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3109 because such sections are not SEC_ALLOC and thus ld.so will
3110 not process them. */
3111 if (unresolved_reloc
3112 && !((input_section->flags & SEC_DEBUGGING) != 0
3114 && _bfd_elf_section_offset (output_bfd, info, input_section,
3115 rel->r_offset) != (bfd_vma) -1)
3117 /* xgettext:c-format */
3118 (_("%B(%A+%#Lx): unresolvable %s relocation against symbol `%s'"),
3123 h->root.root.string);
3127 /* When applying a 24 bit reloc we need to start one byte
3128 earlier. Otherwise the 32 bit get/put bfd operations might
3129 access a byte after the actual section. */
3130 if (r_type == R_390_PC24DBL
3131 || r_type == R_390_PLT24DBL)
3134 if (r_type == R_390_20
3135 || r_type == R_390_GOT20
3136 || r_type == R_390_GOTPLT20
3137 || r_type == R_390_TLS_GOTIE20)
3139 relocation += rel->r_addend;
3140 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3141 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3142 contents, rel->r_offset,
3146 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3147 contents, rel->r_offset,
3148 relocation, rel->r_addend);
3150 if (r != bfd_reloc_ok)
3155 name = h->root.root.string;
3158 name = bfd_elf_string_from_elf_section (input_bfd,
3159 symtab_hdr->sh_link,
3164 name = bfd_section_name (input_bfd, sec);
3167 if (r == bfd_reloc_overflow)
3168 (*info->callbacks->reloc_overflow)
3169 (info, (h ? &h->root : NULL), name, howto->name,
3170 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3174 /* xgettext:c-format */
3175 (_("%B(%A+%#Lx): reloc against `%s': error %d"),
3176 input_bfd, input_section,
3177 rel->r_offset, name, (int) r);
3186 /* Generate the PLT slots together with the dynamic relocations needed
3187 for IFUNC symbols. */
3190 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3191 struct bfd_link_info *info,
3192 struct elf_link_hash_entry *h,
3193 struct elf_s390_link_hash_table *htab,
3195 bfd_vma resolver_address)
3199 Elf_Internal_Rela rela;
3201 asection *plt, *gotplt, *relplt;
3203 if (htab->elf.iplt == NULL
3204 || htab->elf.igotplt == NULL
3205 || htab->elf.irelplt == NULL)
3208 /* Index of the PLT slot within iplt section. */
3209 plt_index = plt_offset / PLT_ENTRY_SIZE;
3210 plt = htab->elf.iplt;
3211 /* Offset into the igot.plt section. */
3212 got_offset = plt_index * GOT_ENTRY_SIZE;
3213 gotplt = htab->elf.igotplt;
3214 relplt = htab->elf.irelplt;
3216 /* Fill in the blueprint of a PLT. */
3217 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3220 /* Fixup the relative address to the GOT entry */
3221 bfd_put_32 (output_bfd,
3222 (gotplt->output_section->vma +
3223 gotplt->output_offset + got_offset
3224 - (plt->output_section->vma +
3225 plt->output_offset +
3227 plt->contents + plt_offset + 2);
3228 /* Fixup the relative branch to PLT 0 */
3229 bfd_put_32 (output_bfd, - (plt->output_offset +
3230 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3231 plt->contents + plt_offset + 24);
3232 /* Fixup offset into .rela.plt section. */
3233 bfd_put_32 (output_bfd, relplt->output_offset +
3234 plt_index * sizeof (Elf64_External_Rela),
3235 plt->contents + plt_offset + 28);
3237 /* Fill in the entry in the global offset table.
3238 Points to instruction after GOT offset. */
3239 bfd_put_64 (output_bfd,
3240 (plt->output_section->vma
3241 + plt->output_offset
3244 gotplt->contents + got_offset);
3246 /* Fill in the entry in the .rela.plt section. */
3247 rela.r_offset = (gotplt->output_section->vma
3248 + gotplt->output_offset
3253 || ((bfd_link_executable (info)
3254 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3257 /* The symbol can be locally resolved. */
3258 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3259 rela.r_addend = resolver_address;
3263 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3267 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3268 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3272 /* Finish up dynamic symbol handling. We set the contents of various
3273 dynamic sections here. */
3276 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3277 struct bfd_link_info *info,
3278 struct elf_link_hash_entry *h,
3279 Elf_Internal_Sym *sym)
3281 struct elf_s390_link_hash_table *htab;
3282 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3284 htab = elf_s390_hash_table (info);
3288 if (h->plt.offset != (bfd_vma) -1)
3292 Elf_Internal_Rela rela;
3295 /* This symbol has an entry in the procedure linkage table. Set
3297 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3299 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3300 htab, h->plt.offset,
3301 eh->ifunc_resolver_address +
3302 eh->ifunc_resolver_section->output_offset +
3303 eh->ifunc_resolver_section->output_section->vma);
3305 /* Do not return yet. Handling of explicit GOT slots of
3306 IFUNC symbols is below. */
3310 if (h->dynindx == -1
3311 || htab->elf.splt == NULL
3312 || htab->elf.sgotplt == NULL
3313 || htab->elf.srelplt == NULL)
3317 Current offset - size first entry / entry size. */
3318 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3320 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3322 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3324 /* Fill in the blueprint of a PLT. */
3325 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3328 /* Fixup the relative address to the GOT entry */
3329 bfd_put_32 (output_bfd,
3330 (htab->elf.sgotplt->output_section->vma +
3331 htab->elf.sgotplt->output_offset + got_offset
3332 - (htab->elf.splt->output_section->vma +
3333 htab->elf.splt->output_offset +
3335 htab->elf.splt->contents + h->plt.offset + 2);
3336 /* Fixup the relative branch to PLT 0 */
3337 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3338 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3339 htab->elf.splt->contents + h->plt.offset + 24);
3340 /* Fixup offset into .rela.plt section. */
3341 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3342 htab->elf.splt->contents + h->plt.offset + 28);
3344 /* Fill in the entry in the global offset table.
3345 Points to instruction after GOT offset. */
3346 bfd_put_64 (output_bfd,
3347 (htab->elf.splt->output_section->vma
3348 + htab->elf.splt->output_offset
3351 htab->elf.sgotplt->contents + got_offset);
3353 /* Fill in the entry in the .rela.plt section. */
3354 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3355 + htab->elf.sgotplt->output_offset
3357 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3359 loc = htab->elf.srelplt->contents + plt_index *
3360 sizeof (Elf64_External_Rela);
3361 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3363 if (!h->def_regular)
3365 /* Mark the symbol as undefined, rather than as defined in
3366 the .plt section. Leave the value alone. This is a clue
3367 for the dynamic linker, to make function pointer
3368 comparisons work between an application and shared
3370 sym->st_shndx = SHN_UNDEF;
3375 if (h->got.offset != (bfd_vma) -1
3376 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3377 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3378 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3380 Elf_Internal_Rela rela;
3383 /* This symbol has an entry in the global offset table. Set it
3385 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3388 rela.r_offset = (htab->elf.sgot->output_section->vma
3389 + htab->elf.sgot->output_offset
3390 + (h->got.offset &~ (bfd_vma) 1));
3392 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3394 if (bfd_link_pic (info))
3396 /* An explicit GOT slot usage needs GLOB_DAT. If the
3397 symbol references local the implicit got.iplt slot
3398 will be used and the IRELATIVE reloc has been created
3404 /* For non-shared objects explicit GOT slots must be
3405 filled with the PLT slot address for pointer
3406 equality reasons. */
3407 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3408 + htab->elf.iplt->output_offset
3410 htab->elf.sgot->contents + h->got.offset);
3414 else if (bfd_link_pic (info)
3415 && SYMBOL_REFERENCES_LOCAL (info, h))
3417 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info, h))
3420 /* If this is a static link, or it is a -Bsymbolic link and
3421 the symbol is defined locally or was forced to be local
3422 because of a version file, we just want to emit a
3423 RELATIVE reloc. The entry in the global offset table
3424 will already have been initialized in the
3425 relocate_section function. */
3426 if (!(h->def_regular || ELF_COMMON_DEF_P (h)))
3428 BFD_ASSERT((h->got.offset & 1) != 0);
3429 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3430 rela.r_addend = (h->root.u.def.value
3431 + h->root.u.def.section->output_section->vma
3432 + h->root.u.def.section->output_offset);
3436 BFD_ASSERT((h->got.offset & 1) == 0);
3438 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3439 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3443 loc = htab->elf.srelgot->contents;
3444 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3445 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3450 Elf_Internal_Rela rela;
3454 /* This symbols needs a copy reloc. Set it up. */
3456 if (h->dynindx == -1
3457 || (h->root.type != bfd_link_hash_defined
3458 && h->root.type != bfd_link_hash_defweak)
3459 || htab->elf.srelbss == NULL)
3462 rela.r_offset = (h->root.u.def.value
3463 + h->root.u.def.section->output_section->vma
3464 + h->root.u.def.section->output_offset);
3465 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3467 if (h->root.u.def.section == htab->elf.sdynrelro)
3468 s = htab->elf.sreldynrelro;
3470 s = htab->elf.srelbss;
3471 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3472 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3475 /* Mark some specially defined symbols as absolute. */
3476 if (h == htab->elf.hdynamic
3477 || h == htab->elf.hgot
3478 || h == htab->elf.hplt)
3479 sym->st_shndx = SHN_ABS;
3484 /* Used to decide how to sort relocs in an optimal manner for the
3485 dynamic linker, before writing them out. */
3487 static enum elf_reloc_type_class
3488 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3489 const asection *rel_sec ATTRIBUTE_UNUSED,
3490 const Elf_Internal_Rela *rela)
3492 bfd *abfd = info->output_bfd;
3493 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3494 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3495 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3496 Elf_Internal_Sym sym;
3498 if (htab->elf.dynsym == NULL
3499 || !bed->s->swap_symbol_in (abfd,
3500 (htab->elf.dynsym->contents
3501 + r_symndx * bed->s->sizeof_sym),
3505 /* Check relocation against STT_GNU_IFUNC symbol. */
3506 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3507 return reloc_class_ifunc;
3509 switch ((int) ELF64_R_TYPE (rela->r_info))
3511 case R_390_RELATIVE:
3512 return reloc_class_relative;
3513 case R_390_JMP_SLOT:
3514 return reloc_class_plt;
3516 return reloc_class_copy;
3518 return reloc_class_normal;
3522 /* Finish up the dynamic sections. */
3525 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3526 struct bfd_link_info *info)
3528 struct elf_s390_link_hash_table *htab;
3534 htab = elf_s390_hash_table (info);
3538 dynobj = htab->elf.dynobj;
3539 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3541 if (htab->elf.dynamic_sections_created)
3543 Elf64_External_Dyn *dyncon, *dynconend;
3545 if (sdyn == NULL || htab->elf.sgot == NULL)
3548 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3549 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3550 for (; dyncon < dynconend; dyncon++)
3552 Elf_Internal_Dyn dyn;
3555 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3563 s = htab->elf.sgotplt;
3564 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3568 s = htab->elf.srelplt;
3569 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3573 dyn.d_un.d_val = htab->elf.srelplt->size;
3574 if (htab->elf.irelplt)
3575 dyn.d_un.d_val += htab->elf.irelplt->size;
3579 /* The procedure linkage table relocs (DT_JMPREL) should
3580 not be included in the overall relocs (DT_RELA).
3581 Therefore, we override the DT_RELASZ entry here to
3582 make it not include the JMPREL relocs. Since the
3583 linker script arranges for .rela.plt to follow all
3584 other relocation sections, we don't have to worry
3585 about changing the DT_RELA entry. */
3586 dyn.d_un.d_val -= htab->elf.srelplt->size;
3587 if (htab->elf.irelplt)
3588 dyn.d_un.d_val -= htab->elf.irelplt->size;
3592 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3595 /* Fill in the special first entry in the procedure linkage table. */
3596 if (htab->elf.splt && htab->elf.splt->size > 0)
3598 /* fill in blueprint for plt 0 entry */
3599 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3600 PLT_FIRST_ENTRY_SIZE);
3601 /* Fixup relative address to start of GOT */
3602 bfd_put_32 (output_bfd,
3603 (htab->elf.sgotplt->output_section->vma
3604 + htab->elf.sgotplt->output_offset
3605 - htab->elf.splt->output_section->vma
3606 - htab->elf.splt->output_offset - 6)/2,
3607 htab->elf.splt->contents + 8);
3609 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3610 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3614 if (htab->elf.sgotplt)
3616 /* Fill in the first three entries in the global offset table. */
3617 if (htab->elf.sgotplt->size > 0)
3619 bfd_put_64 (output_bfd,
3620 (sdyn == NULL ? (bfd_vma) 0
3621 : sdyn->output_section->vma + sdyn->output_offset),
3622 htab->elf.sgotplt->contents);
3623 /* One entry for shared object struct ptr. */
3624 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3625 /* One entry for _dl_runtime_resolve. */
3626 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3629 elf_section_data (htab->elf.sgot->output_section)
3630 ->this_hdr.sh_entsize = 8;
3633 /* Finish dynamic symbol for local IFUNC symbols. */
3634 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3636 struct plt_entry *local_plt;
3637 Elf_Internal_Sym *isym;
3638 Elf_Internal_Shdr *symtab_hdr;
3640 symtab_hdr = &elf_symtab_hdr (ibfd);
3642 if (!is_s390_elf (ibfd))
3645 local_plt = elf_s390_local_plt (ibfd);
3646 if (local_plt != NULL)
3647 for (i = 0; i < symtab_hdr->sh_info; i++)
3649 if (local_plt[i].plt.offset != (bfd_vma) -1)
3651 asection *sec = local_plt[i].sec;
3652 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3656 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3657 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3658 local_plt[i].plt.offset,
3660 + sec->output_section->vma
3661 + sec->output_offset);
3670 /* Support for core dump NOTE sections. */
3673 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3678 switch (note->descsz)
3683 case 336: /* sizeof(struct elf_prstatus) on s390x */
3685 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3688 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3696 /* Make a ".reg/999" section. */
3697 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3698 size, note->descpos + offset);
3702 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3704 switch (note->descsz)
3709 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3710 elf_tdata (abfd)->core->pid
3711 = bfd_get_32 (abfd, note->descdata + 24);
3712 elf_tdata (abfd)->core->program
3713 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3714 elf_tdata (abfd)->core->command
3715 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3718 /* Note that for some reason, a spurious space is tacked
3719 onto the end of the args in some (at least one anyway)
3720 implementations, so strip it off if it exists. */
3723 char *command = elf_tdata (abfd)->core->command;
3724 int n = strlen (command);
3726 if (0 < n && command[n - 1] == ' ')
3727 command[n - 1] = '\0';
3734 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3746 char data[136] = { 0 };
3747 const char *fname, *psargs;
3749 va_start (ap, note_type);
3750 fname = va_arg (ap, const char *);
3751 psargs = va_arg (ap, const char *);
3754 strncpy (data + 40, fname, 16);
3755 strncpy (data + 56, psargs, 80);
3756 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3757 &data, sizeof (data));
3762 char data[336] = { 0 };
3767 va_start (ap, note_type);
3768 pid = va_arg (ap, long);
3769 cursig = va_arg (ap, int);
3770 gregs = va_arg (ap, const void *);
3773 bfd_put_16 (abfd, cursig, data + 12);
3774 bfd_put_32 (abfd, pid, data + 32);
3775 memcpy (data + 112, gregs, 216);
3776 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3777 &data, sizeof (data));
3783 /* Return address for Ith PLT stub in section PLT, for relocation REL
3784 or (bfd_vma) -1 if it should not be included. */
3787 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3788 const arelent *rel ATTRIBUTE_UNUSED)
3790 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3793 /* Merge backend specific data from an object file to the output
3794 object file when linking. */
3797 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3799 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3802 return elf_s390_merge_obj_attributes (ibfd, info);
3805 /* We may add a PT_S390_PGSTE program header. */
3808 elf_s390_additional_program_headers (bfd *abfd ATTRIBUTE_UNUSED,
3809 struct bfd_link_info *info)
3811 struct elf_s390_link_hash_table *htab;
3815 htab = elf_s390_hash_table (info);
3817 return htab->params->pgste;
3823 /* Add the PT_S390_PGSTE program header. */
3826 elf_s390_modify_segment_map (bfd *abfd, struct bfd_link_info *info)
3828 struct elf_s390_link_hash_table *htab;
3829 struct elf_segment_map *m, *pm = NULL;
3834 htab = elf_s390_hash_table (info);
3835 if (!htab || !htab->params->pgste)
3838 /* If there is already a PT_S390_PGSTE header, avoid adding
3840 m = elf_seg_map (abfd);
3841 while (m && m->p_type != PT_S390_PGSTE)
3850 m = (struct elf_segment_map *)
3851 bfd_zalloc (abfd, sizeof (struct elf_segment_map));
3854 m->p_type = PT_S390_PGSTE;
3864 bfd_elf_s390_set_options (struct bfd_link_info *info,
3865 struct s390_elf_params *params)
3867 struct elf_s390_link_hash_table *htab;
3871 htab = elf_s390_hash_table (info);
3873 htab->params = params;
3880 /* Why was the hash table entry size definition changed from
3881 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3882 this is the only reason for the s390_elf64_size_info structure. */
3884 const struct elf_size_info s390_elf64_size_info =
3886 sizeof (Elf64_External_Ehdr),
3887 sizeof (Elf64_External_Phdr),
3888 sizeof (Elf64_External_Shdr),
3889 sizeof (Elf64_External_Rel),
3890 sizeof (Elf64_External_Rela),
3891 sizeof (Elf64_External_Sym),
3892 sizeof (Elf64_External_Dyn),
3893 sizeof (Elf_External_Note),
3894 8, /* hash-table entry size. */
3895 1, /* internal relocations per external relocations. */
3896 64, /* arch_size. */
3897 3, /* log_file_align. */
3898 ELFCLASS64, EV_CURRENT,
3899 bfd_elf64_write_out_phdrs,
3900 bfd_elf64_write_shdrs_and_ehdr,
3901 bfd_elf64_checksum_contents,
3902 bfd_elf64_write_relocs,
3903 bfd_elf64_swap_symbol_in,
3904 bfd_elf64_swap_symbol_out,
3905 bfd_elf64_slurp_reloc_table,
3906 bfd_elf64_slurp_symbol_table,
3907 bfd_elf64_swap_dyn_in,
3908 bfd_elf64_swap_dyn_out,
3909 bfd_elf64_swap_reloc_in,
3910 bfd_elf64_swap_reloc_out,
3911 bfd_elf64_swap_reloca_in,
3912 bfd_elf64_swap_reloca_out
3915 #define TARGET_BIG_SYM s390_elf64_vec
3916 #define TARGET_BIG_NAME "elf64-s390"
3917 #define ELF_ARCH bfd_arch_s390
3918 #define ELF_TARGET_ID S390_ELF_DATA
3919 #define ELF_MACHINE_CODE EM_S390
3920 #define ELF_MACHINE_ALT1 EM_S390_OLD
3921 #define ELF_MAXPAGESIZE 0x1000
3923 #define elf_backend_size_info s390_elf64_size_info
3925 #define elf_backend_can_gc_sections 1
3926 #define elf_backend_can_refcount 1
3927 #define elf_backend_want_got_plt 1
3928 #define elf_backend_plt_readonly 1
3929 #define elf_backend_want_plt_sym 0
3930 #define elf_backend_got_header_size 24
3931 #define elf_backend_want_dynrelro 1
3932 #define elf_backend_rela_normal 1
3934 #define elf_info_to_howto elf_s390_info_to_howto
3936 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3937 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3938 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3939 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3940 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3942 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3943 #define elf_backend_check_relocs elf_s390_check_relocs
3944 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3945 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3946 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3947 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3948 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3949 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3950 #define elf_backend_relocate_section elf_s390_relocate_section
3951 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3952 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3953 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3954 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3955 #define elf_backend_write_core_note elf_s390_write_core_note
3956 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3957 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3958 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3959 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
3960 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
3962 #define bfd_elf64_mkobject elf_s390_mkobject
3963 #define elf_backend_object_p elf_s390_object_p
3965 #include "elf64-target.h"