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
30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
31 from smaller values. Start with zero, widen, *then* decrement. */
32 #define MINUS_ONE (((bfd_vma)0) - 1)
34 static bfd_reloc_status_type
35 s390_tls_reloc (bfd *, arelent *, asymbol *, void *,
36 asection *, bfd *, char **);
37 static bfd_reloc_status_type
38 s390_elf_ldisp_reloc (bfd *, arelent *, asymbol *, void *,
39 asection *, bfd *, char **);
41 /* The relocation "howto" table. */
42 static reloc_howto_type elf_howto_table[] =
44 HOWTO (R_390_NONE, /* type */
46 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 FALSE, /* pc_relative */
50 complain_overflow_dont, /* complain_on_overflow */
51 bfd_elf_generic_reloc, /* special_function */
52 "R_390_NONE", /* name */
53 FALSE, /* partial_inplace */
56 FALSE), /* pcrel_offset */
58 HOWTO(R_390_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield,
59 bfd_elf_generic_reloc, "R_390_8", FALSE, 0,0x000000ff, FALSE),
60 HOWTO(R_390_12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
61 bfd_elf_generic_reloc, "R_390_12", FALSE, 0,0x00000fff, FALSE),
62 HOWTO(R_390_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
63 bfd_elf_generic_reloc, "R_390_16", FALSE, 0,0x0000ffff, FALSE),
64 HOWTO(R_390_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
65 bfd_elf_generic_reloc, "R_390_32", FALSE, 0,0xffffffff, FALSE),
66 HOWTO(R_390_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
67 bfd_elf_generic_reloc, "R_390_PC32", FALSE, 0,0xffffffff, TRUE),
68 HOWTO(R_390_GOT12, 0, 1, 12, FALSE, 0, complain_overflow_bitfield,
69 bfd_elf_generic_reloc, "R_390_GOT12", FALSE, 0,0x00000fff, FALSE),
70 HOWTO(R_390_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
71 bfd_elf_generic_reloc, "R_390_GOT32", FALSE, 0,0xffffffff, FALSE),
72 HOWTO(R_390_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield,
73 bfd_elf_generic_reloc, "R_390_PLT32", FALSE, 0,0xffffffff, TRUE),
74 HOWTO(R_390_COPY, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
75 bfd_elf_generic_reloc, "R_390_COPY", FALSE, 0,MINUS_ONE, FALSE),
76 HOWTO(R_390_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
77 bfd_elf_generic_reloc, "R_390_GLOB_DAT", FALSE, 0,MINUS_ONE, FALSE),
78 HOWTO(R_390_JMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
79 bfd_elf_generic_reloc, "R_390_JMP_SLOT", FALSE, 0,MINUS_ONE, FALSE),
80 HOWTO(R_390_RELATIVE, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
81 bfd_elf_generic_reloc, "R_390_RELATIVE", FALSE, 0,MINUS_ONE, FALSE),
82 HOWTO(R_390_GOTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
83 bfd_elf_generic_reloc, "R_390_GOTOFF32", FALSE, 0,MINUS_ONE, FALSE),
84 HOWTO(R_390_GOTPC, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
85 bfd_elf_generic_reloc, "R_390_GOTPC", FALSE, 0,MINUS_ONE, TRUE),
86 HOWTO(R_390_GOT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
87 bfd_elf_generic_reloc, "R_390_GOT16", FALSE, 0,0x0000ffff, FALSE),
88 HOWTO(R_390_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield,
89 bfd_elf_generic_reloc, "R_390_PC16", FALSE, 0,0x0000ffff, TRUE),
90 HOWTO(R_390_PC16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
91 bfd_elf_generic_reloc, "R_390_PC16DBL", FALSE, 0,0x0000ffff, TRUE),
92 HOWTO(R_390_PLT16DBL, 1, 1, 16, TRUE, 0, complain_overflow_bitfield,
93 bfd_elf_generic_reloc, "R_390_PLT16DBL", FALSE, 0,0x0000ffff, TRUE),
94 HOWTO(R_390_PC32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
95 bfd_elf_generic_reloc, "R_390_PC32DBL", FALSE, 0,0xffffffff, TRUE),
96 HOWTO(R_390_PLT32DBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
97 bfd_elf_generic_reloc, "R_390_PLT32DBL", FALSE, 0,0xffffffff, TRUE),
98 HOWTO(R_390_GOTPCDBL, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
99 bfd_elf_generic_reloc, "R_390_GOTPCDBL", FALSE, 0,MINUS_ONE, TRUE),
100 HOWTO(R_390_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
101 bfd_elf_generic_reloc, "R_390_64", FALSE, 0,MINUS_ONE, FALSE),
102 HOWTO(R_390_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
103 bfd_elf_generic_reloc, "R_390_PC64", FALSE, 0,MINUS_ONE, TRUE),
104 HOWTO(R_390_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
105 bfd_elf_generic_reloc, "R_390_GOT64", FALSE, 0,MINUS_ONE, FALSE),
106 HOWTO(R_390_PLT64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield,
107 bfd_elf_generic_reloc, "R_390_PLT64", FALSE, 0,MINUS_ONE, TRUE),
108 HOWTO(R_390_GOTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
109 bfd_elf_generic_reloc, "R_390_GOTENT", FALSE, 0,MINUS_ONE, TRUE),
110 HOWTO(R_390_GOTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
111 bfd_elf_generic_reloc, "R_390_GOTOFF16", FALSE, 0,0x0000ffff, FALSE),
112 HOWTO(R_390_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
113 bfd_elf_generic_reloc, "R_390_GOTOFF64", FALSE, 0,MINUS_ONE, FALSE),
114 HOWTO(R_390_GOTPLT12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
115 bfd_elf_generic_reloc, "R_390_GOTPLT12", FALSE, 0,0x00000fff, FALSE),
116 HOWTO(R_390_GOTPLT16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
117 bfd_elf_generic_reloc, "R_390_GOTPLT16", FALSE, 0,0x0000ffff, FALSE),
118 HOWTO(R_390_GOTPLT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
119 bfd_elf_generic_reloc, "R_390_GOTPLT32", FALSE, 0,0xffffffff, FALSE),
120 HOWTO(R_390_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
121 bfd_elf_generic_reloc, "R_390_GOTPLT64", FALSE, 0,MINUS_ONE, FALSE),
122 HOWTO(R_390_GOTPLTENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
123 bfd_elf_generic_reloc, "R_390_GOTPLTENT",FALSE, 0,MINUS_ONE, TRUE),
124 HOWTO(R_390_PLTOFF16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield,
125 bfd_elf_generic_reloc, "R_390_PLTOFF16", FALSE, 0,0x0000ffff, FALSE),
126 HOWTO(R_390_PLTOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
127 bfd_elf_generic_reloc, "R_390_PLTOFF32", FALSE, 0,0xffffffff, FALSE),
128 HOWTO(R_390_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
129 bfd_elf_generic_reloc, "R_390_PLTOFF64", FALSE, 0,MINUS_ONE, FALSE),
130 HOWTO(R_390_TLS_LOAD, 0, 0, 0, FALSE, 0, complain_overflow_dont,
131 s390_tls_reloc, "R_390_TLS_LOAD", FALSE, 0, 0, FALSE),
132 HOWTO(R_390_TLS_GDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
133 s390_tls_reloc, "R_390_TLS_GDCALL", FALSE, 0, 0, FALSE),
134 HOWTO(R_390_TLS_LDCALL, 0, 0, 0, FALSE, 0, complain_overflow_dont,
135 s390_tls_reloc, "R_390_TLS_LDCALL", FALSE, 0, 0, FALSE),
136 EMPTY_HOWTO (R_390_TLS_GD32), /* Empty entry for R_390_TLS_GD32. */
137 HOWTO(R_390_TLS_GD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
138 bfd_elf_generic_reloc, "R_390_TLS_GD64", FALSE, 0, MINUS_ONE, FALSE),
139 HOWTO(R_390_TLS_GOTIE12, 0, 1, 12, FALSE, 0, complain_overflow_dont,
140 bfd_elf_generic_reloc, "R_390_TLS_GOTIE12", FALSE, 0, 0x00000fff, FALSE),
141 EMPTY_HOWTO (R_390_TLS_GOTIE32), /* Empty entry for R_390_TLS_GOTIE32. */
142 HOWTO(R_390_TLS_GOTIE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
143 bfd_elf_generic_reloc, "R_390_TLS_GOTIE64", FALSE, 0, MINUS_ONE, FALSE),
144 EMPTY_HOWTO (R_390_TLS_LDM32), /* Empty entry for R_390_TLS_LDM32. */
145 HOWTO(R_390_TLS_LDM64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
146 bfd_elf_generic_reloc, "R_390_TLS_LDM64", FALSE, 0, MINUS_ONE, FALSE),
147 EMPTY_HOWTO (R_390_TLS_IE32), /* Empty entry for R_390_TLS_IE32. */
148 HOWTO(R_390_TLS_IE64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
149 bfd_elf_generic_reloc, "R_390_TLS_IE64", FALSE, 0, MINUS_ONE, FALSE),
150 HOWTO(R_390_TLS_IEENT, 1, 2, 32, TRUE, 0, complain_overflow_bitfield,
151 bfd_elf_generic_reloc, "R_390_TLS_IEENT", FALSE, 0, MINUS_ONE, TRUE),
152 EMPTY_HOWTO (R_390_TLS_LE32), /* Empty entry for R_390_TLS_LE32. */
153 HOWTO(R_390_TLS_LE64, 0, 2, 32, FALSE, 0, complain_overflow_bitfield,
154 bfd_elf_generic_reloc, "R_390_TLS_LE64", FALSE, 0, MINUS_ONE, FALSE),
155 EMPTY_HOWTO (R_390_TLS_LDO32), /* Empty entry for R_390_TLS_LDO32. */
156 HOWTO(R_390_TLS_LDO64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
157 bfd_elf_generic_reloc, "R_390_TLS_LDO64", FALSE, 0, MINUS_ONE, FALSE),
158 HOWTO(R_390_TLS_DTPMOD, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
159 bfd_elf_generic_reloc, "R_390_TLS_DTPMOD", FALSE, 0, MINUS_ONE, FALSE),
160 HOWTO(R_390_TLS_DTPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
161 bfd_elf_generic_reloc, "R_390_TLS_DTPOFF", FALSE, 0, MINUS_ONE, FALSE),
162 HOWTO(R_390_TLS_TPOFF, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
163 bfd_elf_generic_reloc, "R_390_TLS_TPOFF", FALSE, 0, MINUS_ONE, FALSE),
164 HOWTO(R_390_20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
165 s390_elf_ldisp_reloc, "R_390_20", FALSE, 0,0x0fffff00, FALSE),
166 HOWTO(R_390_GOT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
167 s390_elf_ldisp_reloc, "R_390_GOT20", FALSE, 0,0x0fffff00, FALSE),
168 HOWTO(R_390_GOTPLT20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
169 s390_elf_ldisp_reloc, "R_390_GOTPLT20", FALSE, 0,0x0fffff00, FALSE),
170 HOWTO(R_390_TLS_GOTIE20, 0, 2, 20, FALSE, 8, complain_overflow_dont,
171 s390_elf_ldisp_reloc, "R_390_TLS_GOTIE20", FALSE, 0,0x0fffff00, FALSE),
172 HOWTO(R_390_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield,
173 bfd_elf_generic_reloc, "R_390_IRELATIVE", FALSE, 0, MINUS_ONE, FALSE),
174 HOWTO(R_390_PC12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
175 bfd_elf_generic_reloc, "R_390_PC12DBL", FALSE, 0,0x00000fff, TRUE),
176 HOWTO(R_390_PLT12DBL, 1, 1, 12, TRUE, 0, complain_overflow_bitfield,
177 bfd_elf_generic_reloc, "R_390_PLT12DBL", FALSE, 0,0x00000fff, TRUE),
178 HOWTO(R_390_PC24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
179 bfd_elf_generic_reloc, "R_390_PC24DBL", FALSE, 0,0x00ffffff, TRUE),
180 HOWTO(R_390_PLT24DBL, 1, 2, 24, TRUE, 0, complain_overflow_bitfield,
181 bfd_elf_generic_reloc, "R_390_PLT24DBL", FALSE, 0,0x00ffffff, TRUE),
184 /* GNU extension to record C++ vtable hierarchy. */
185 static reloc_howto_type elf64_s390_vtinherit_howto =
186 HOWTO (R_390_GNU_VTINHERIT, 0,4,0,FALSE,0,complain_overflow_dont, NULL, "R_390_GNU_VTINHERIT", FALSE,0, 0, FALSE);
187 static reloc_howto_type elf64_s390_vtentry_howto =
188 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);
190 static reloc_howto_type *
191 elf_s390_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED,
192 bfd_reloc_code_real_type code)
197 return &elf_howto_table[(int) R_390_NONE];
199 return &elf_howto_table[(int) R_390_8];
200 case BFD_RELOC_390_12:
201 return &elf_howto_table[(int) R_390_12];
203 return &elf_howto_table[(int) R_390_16];
205 return &elf_howto_table[(int) R_390_32];
207 return &elf_howto_table[(int) R_390_32];
208 case BFD_RELOC_32_PCREL:
209 return &elf_howto_table[(int) R_390_PC32];
210 case BFD_RELOC_390_GOT12:
211 return &elf_howto_table[(int) R_390_GOT12];
212 case BFD_RELOC_32_GOT_PCREL:
213 return &elf_howto_table[(int) R_390_GOT32];
214 case BFD_RELOC_390_PLT32:
215 return &elf_howto_table[(int) R_390_PLT32];
216 case BFD_RELOC_390_COPY:
217 return &elf_howto_table[(int) R_390_COPY];
218 case BFD_RELOC_390_GLOB_DAT:
219 return &elf_howto_table[(int) R_390_GLOB_DAT];
220 case BFD_RELOC_390_JMP_SLOT:
221 return &elf_howto_table[(int) R_390_JMP_SLOT];
222 case BFD_RELOC_390_RELATIVE:
223 return &elf_howto_table[(int) R_390_RELATIVE];
224 case BFD_RELOC_32_GOTOFF:
225 return &elf_howto_table[(int) R_390_GOTOFF32];
226 case BFD_RELOC_390_GOTPC:
227 return &elf_howto_table[(int) R_390_GOTPC];
228 case BFD_RELOC_390_GOT16:
229 return &elf_howto_table[(int) R_390_GOT16];
230 case BFD_RELOC_16_PCREL:
231 return &elf_howto_table[(int) R_390_PC16];
232 case BFD_RELOC_390_PC12DBL:
233 return &elf_howto_table[(int) R_390_PC12DBL];
234 case BFD_RELOC_390_PLT12DBL:
235 return &elf_howto_table[(int) R_390_PLT12DBL];
236 case BFD_RELOC_390_PC16DBL:
237 return &elf_howto_table[(int) R_390_PC16DBL];
238 case BFD_RELOC_390_PLT16DBL:
239 return &elf_howto_table[(int) R_390_PLT16DBL];
240 case BFD_RELOC_390_PC24DBL:
241 return &elf_howto_table[(int) R_390_PC24DBL];
242 case BFD_RELOC_390_PLT24DBL:
243 return &elf_howto_table[(int) R_390_PLT24DBL];
244 case BFD_RELOC_390_PC32DBL:
245 return &elf_howto_table[(int) R_390_PC32DBL];
246 case BFD_RELOC_390_PLT32DBL:
247 return &elf_howto_table[(int) R_390_PLT32DBL];
248 case BFD_RELOC_390_GOTPCDBL:
249 return &elf_howto_table[(int) R_390_GOTPCDBL];
251 return &elf_howto_table[(int) R_390_64];
252 case BFD_RELOC_64_PCREL:
253 return &elf_howto_table[(int) R_390_PC64];
254 case BFD_RELOC_390_GOT64:
255 return &elf_howto_table[(int) R_390_GOT64];
256 case BFD_RELOC_390_PLT64:
257 return &elf_howto_table[(int) R_390_PLT64];
258 case BFD_RELOC_390_GOTENT:
259 return &elf_howto_table[(int) R_390_GOTENT];
260 case BFD_RELOC_16_GOTOFF:
261 return &elf_howto_table[(int) R_390_GOTOFF16];
262 case BFD_RELOC_390_GOTOFF64:
263 return &elf_howto_table[(int) R_390_GOTOFF64];
264 case BFD_RELOC_390_GOTPLT12:
265 return &elf_howto_table[(int) R_390_GOTPLT12];
266 case BFD_RELOC_390_GOTPLT16:
267 return &elf_howto_table[(int) R_390_GOTPLT16];
268 case BFD_RELOC_390_GOTPLT32:
269 return &elf_howto_table[(int) R_390_GOTPLT32];
270 case BFD_RELOC_390_GOTPLT64:
271 return &elf_howto_table[(int) R_390_GOTPLT64];
272 case BFD_RELOC_390_GOTPLTENT:
273 return &elf_howto_table[(int) R_390_GOTPLTENT];
274 case BFD_RELOC_390_PLTOFF16:
275 return &elf_howto_table[(int) R_390_PLTOFF16];
276 case BFD_RELOC_390_PLTOFF32:
277 return &elf_howto_table[(int) R_390_PLTOFF32];
278 case BFD_RELOC_390_PLTOFF64:
279 return &elf_howto_table[(int) R_390_PLTOFF64];
280 case BFD_RELOC_390_TLS_LOAD:
281 return &elf_howto_table[(int) R_390_TLS_LOAD];
282 case BFD_RELOC_390_TLS_GDCALL:
283 return &elf_howto_table[(int) R_390_TLS_GDCALL];
284 case BFD_RELOC_390_TLS_LDCALL:
285 return &elf_howto_table[(int) R_390_TLS_LDCALL];
286 case BFD_RELOC_390_TLS_GD64:
287 return &elf_howto_table[(int) R_390_TLS_GD64];
288 case BFD_RELOC_390_TLS_GOTIE12:
289 return &elf_howto_table[(int) R_390_TLS_GOTIE12];
290 case BFD_RELOC_390_TLS_GOTIE64:
291 return &elf_howto_table[(int) R_390_TLS_GOTIE64];
292 case BFD_RELOC_390_TLS_LDM64:
293 return &elf_howto_table[(int) R_390_TLS_LDM64];
294 case BFD_RELOC_390_TLS_IE64:
295 return &elf_howto_table[(int) R_390_TLS_IE64];
296 case BFD_RELOC_390_TLS_IEENT:
297 return &elf_howto_table[(int) R_390_TLS_IEENT];
298 case BFD_RELOC_390_TLS_LE64:
299 return &elf_howto_table[(int) R_390_TLS_LE64];
300 case BFD_RELOC_390_TLS_LDO64:
301 return &elf_howto_table[(int) R_390_TLS_LDO64];
302 case BFD_RELOC_390_TLS_DTPMOD:
303 return &elf_howto_table[(int) R_390_TLS_DTPMOD];
304 case BFD_RELOC_390_TLS_DTPOFF:
305 return &elf_howto_table[(int) R_390_TLS_DTPOFF];
306 case BFD_RELOC_390_TLS_TPOFF:
307 return &elf_howto_table[(int) R_390_TLS_TPOFF];
308 case BFD_RELOC_390_20:
309 return &elf_howto_table[(int) R_390_20];
310 case BFD_RELOC_390_GOT20:
311 return &elf_howto_table[(int) R_390_GOT20];
312 case BFD_RELOC_390_GOTPLT20:
313 return &elf_howto_table[(int) R_390_GOTPLT20];
314 case BFD_RELOC_390_TLS_GOTIE20:
315 return &elf_howto_table[(int) R_390_TLS_GOTIE20];
316 case BFD_RELOC_390_IRELATIVE:
317 return &elf_howto_table[(int) R_390_IRELATIVE];
318 case BFD_RELOC_VTABLE_INHERIT:
319 return &elf64_s390_vtinherit_howto;
320 case BFD_RELOC_VTABLE_ENTRY:
321 return &elf64_s390_vtentry_howto;
328 static reloc_howto_type *
329 elf_s390_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED,
335 i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]);
337 if (elf_howto_table[i].name != NULL
338 && strcasecmp (elf_howto_table[i].name, r_name) == 0)
339 return &elf_howto_table[i];
341 if (strcasecmp (elf64_s390_vtinherit_howto.name, r_name) == 0)
342 return &elf64_s390_vtinherit_howto;
343 if (strcasecmp (elf64_s390_vtentry_howto.name, r_name) == 0)
344 return &elf64_s390_vtentry_howto;
349 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
350 and elf64-s390.c has its own copy. */
353 elf_s390_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED,
355 Elf_Internal_Rela *dst)
357 unsigned int r_type = ELF64_R_TYPE(dst->r_info);
360 case R_390_GNU_VTINHERIT:
361 cache_ptr->howto = &elf64_s390_vtinherit_howto;
364 case R_390_GNU_VTENTRY:
365 cache_ptr->howto = &elf64_s390_vtentry_howto;
369 if (r_type >= sizeof (elf_howto_table) / sizeof (elf_howto_table[0]))
371 /* xgettext:c-format */
372 _bfd_error_handler (_("%B: invalid relocation type %d"),
376 cache_ptr->howto = &elf_howto_table[r_type];
380 /* A relocation function which doesn't do anything. */
381 static bfd_reloc_status_type
382 s390_tls_reloc (bfd *abfd ATTRIBUTE_UNUSED,
383 arelent *reloc_entry,
384 asymbol *symbol ATTRIBUTE_UNUSED,
385 void * data ATTRIBUTE_UNUSED,
386 asection *input_section,
388 char **error_message ATTRIBUTE_UNUSED)
391 reloc_entry->address += input_section->output_offset;
395 /* Handle the large displacement relocs. */
396 static bfd_reloc_status_type
397 s390_elf_ldisp_reloc (bfd *abfd,
398 arelent *reloc_entry,
401 asection *input_section,
403 char **error_message ATTRIBUTE_UNUSED)
405 reloc_howto_type *howto = reloc_entry->howto;
409 if (output_bfd != (bfd *) NULL
410 && (symbol->flags & BSF_SECTION_SYM) == 0
411 && (! howto->partial_inplace
412 || reloc_entry->addend == 0))
414 reloc_entry->address += input_section->output_offset;
417 if (output_bfd != NULL)
418 return bfd_reloc_continue;
420 if (reloc_entry->address > bfd_get_section_limit (abfd, input_section))
421 return bfd_reloc_outofrange;
423 relocation = (symbol->value
424 + symbol->section->output_section->vma
425 + symbol->section->output_offset);
426 relocation += reloc_entry->addend;
427 if (howto->pc_relative)
429 relocation -= (input_section->output_section->vma
430 + input_section->output_offset);
431 relocation -= reloc_entry->address;
434 insn = bfd_get_32 (abfd, (bfd_byte *) data + reloc_entry->address);
435 insn |= (relocation & 0xfff) << 16 | (relocation & 0xff000) >> 4;
436 bfd_put_32 (abfd, insn, (bfd_byte *) data + reloc_entry->address);
438 if ((bfd_signed_vma) relocation < - 0x80000
439 || (bfd_signed_vma) relocation > 0x7ffff)
440 return bfd_reloc_overflow;
446 elf_s390_is_local_label_name (bfd *abfd, const char *name)
448 if (name[0] == '.' && (name[1] == 'X' || name[1] == 'L'))
451 return _bfd_elf_is_local_label_name (abfd, name);
454 /* Functions for the 390 ELF linker. */
456 /* The name of the dynamic interpreter. This is put in the .interp
459 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
461 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
462 copying dynamic variables from a shared lib into an app's dynbss
463 section, and instead use a dynamic relocation to point into the
465 #define ELIMINATE_COPY_RELOCS 1
467 /* The size in bytes of the first entry in the procedure linkage table. */
468 #define PLT_FIRST_ENTRY_SIZE 32
469 /* The size in bytes of an entry in the procedure linkage table. */
470 #define PLT_ENTRY_SIZE 32
472 #define GOT_ENTRY_SIZE 8
474 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
476 /* The first three entries in a procedure linkage table are reserved,
477 and the initial contents are unimportant (we zero them out).
478 Subsequent entries look like this. See the SVR4 ABI 386
479 supplement to see how this works. */
481 /* For the s390, simple addr offset can only be 0 - 4096.
482 To use the full 16777216 TB address space, several instructions
483 are needed to load an address in a register and execute
484 a branch( or just saving the address)
486 Furthermore, only r 0 and 1 are free to use!!! */
488 /* The first 3 words in the GOT are then reserved.
489 Word 0 is the address of the dynamic table.
490 Word 1 is a pointer to a structure describing the object
491 Word 2 is used to point to the loader entry address.
493 The code for PLT entries looks like this:
495 The GOT holds the address in the PLT to be executed.
496 The loader then gets:
497 48(15) = Pointer to the structure describing the object.
498 56(15) = Offset in symbol table
499 The loader must then find the module where the function is
500 and insert the address in the GOT.
502 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
503 LG 1,0(1) # 6 bytes Load address from GOT in r1
504 BCR 15,1 # 2 bytes Jump to address
505 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
506 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
507 BRCL 15,-x # 6 bytes Jump to start of PLT
508 .long ? # 4 bytes offset into .rela.plt
510 Total = 32 bytes per PLT entry
511 Fixup at offset 2: relative address to GOT entry
512 Fixup at offset 22: relative branch to PLT0
513 Fixup at offset 28: 32 bit offset into .rela.plt
515 A 32 bit offset into the symbol table is enough. It allows for
516 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
517 object (the main program, any shared library) is limited to 4GB in
518 size. Having a .rela.plt of 2GB would already make the .plt
519 section bigger than 8GB. */
521 static const bfd_byte elf_s390x_plt_entry[PLT_ENTRY_SIZE] =
523 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
524 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
525 0x07, 0xf1, /* br %r1 */
526 0x0d, 0x10, /* basr %r1,%r0 */
527 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
528 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
529 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
532 /* The first PLT entry pushes the offset into the symbol table
533 from R1 onto the stack at 56(15) and the loader object info
534 at 48(15), loads the loader address in R1 and jumps to it. */
536 /* The first entry in the PLT:
539 STG 1,56(15) # r1 contains the offset into the symbol table
540 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
541 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
542 LG 1,16(1) # get entry address of loader
543 BCR 15,1 # jump to loader
545 Fixup at offset 8: relative address to start of GOT. */
547 static const bfd_byte elf_s390x_first_plt_entry[PLT_FIRST_ENTRY_SIZE] =
549 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
550 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
551 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
552 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
553 0x07, 0xf1, /* br %r1 */
554 0x07, 0x00, /* nopr %r0 */
555 0x07, 0x00, /* nopr %r0 */
556 0x07, 0x00 /* nopr %r0 */
560 /* s390 ELF linker hash entry. */
562 struct elf_s390_link_hash_entry
564 struct elf_link_hash_entry elf;
566 /* Track dynamic relocs copied for this symbol. */
567 struct elf_dyn_relocs *dyn_relocs;
569 /* Number of GOTPLT references for a function. */
570 bfd_signed_vma gotplt_refcount;
572 #define GOT_UNKNOWN 0
576 #define GOT_TLS_IE_NLT 3
577 unsigned char tls_type;
579 /* For pointer equality reasons we might need to change the symbol
580 type from STT_GNU_IFUNC to STT_FUNC together with its value and
581 section entry. So after alloc_dynrelocs only these values should
582 be used. In order to check whether a symbol is IFUNC use
583 s390_is_ifunc_symbol_p. */
584 bfd_vma ifunc_resolver_address;
585 asection *ifunc_resolver_section;
588 #define elf_s390_hash_entry(ent) \
589 ((struct elf_s390_link_hash_entry *)(ent))
591 /* This structure represents an entry in the local PLT list needed for
592 local IFUNC symbols. */
595 /* The section of the local symbol.
596 Set in relocate_section and used in finish_dynamic_sections. */
601 bfd_signed_vma refcount;
606 /* NOTE: Keep this structure in sync with
607 the one declared in elf32-s390.c. */
608 struct elf_s390_obj_tdata
610 struct elf_obj_tdata root;
612 /* A local PLT is needed for ifunc symbols. */
613 struct plt_entry *local_plt;
615 /* TLS type for each local got entry. */
616 char *local_got_tls_type;
619 #define elf_s390_tdata(abfd) \
620 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
622 #define elf_s390_local_plt(abfd) \
623 (elf_s390_tdata (abfd)->local_plt)
625 #define elf_s390_local_got_tls_type(abfd) \
626 (elf_s390_tdata (abfd)->local_got_tls_type)
628 #define is_s390_elf(bfd) \
629 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
630 && elf_tdata (bfd) != NULL \
631 && elf_object_id (bfd) == S390_ELF_DATA)
634 elf_s390_mkobject (bfd *abfd)
636 return bfd_elf_allocate_object (abfd, sizeof (struct elf_s390_obj_tdata),
641 elf_s390_object_p (bfd *abfd)
643 /* Set the right machine number for an s390 elf32 file. */
644 return bfd_default_set_arch_mach (abfd, bfd_arch_s390, bfd_mach_s390_64);
647 /* s390 ELF linker hash table. */
649 struct elf_s390_link_hash_table
651 struct elf_link_hash_table elf;
653 /* Short-cuts to get to dynamic linker sections. */
657 bfd_signed_vma refcount;
661 /* Small local sym cache. */
662 struct sym_cache sym_cache;
665 /* Get the s390 ELF linker hash table from a link_info structure. */
667 #define elf_s390_hash_table(p) \
668 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
669 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
672 #include "elf-s390-common.c"
674 /* Create an entry in an s390 ELF linker hash table. */
676 static struct bfd_hash_entry *
677 link_hash_newfunc (struct bfd_hash_entry *entry,
678 struct bfd_hash_table *table,
681 /* Allocate the structure if it has not already been allocated by a
685 entry = bfd_hash_allocate (table,
686 sizeof (struct elf_s390_link_hash_entry));
691 /* Call the allocation method of the superclass. */
692 entry = _bfd_elf_link_hash_newfunc (entry, table, string);
695 struct elf_s390_link_hash_entry *eh;
697 eh = (struct elf_s390_link_hash_entry *) entry;
698 eh->dyn_relocs = NULL;
699 eh->gotplt_refcount = 0;
700 eh->tls_type = GOT_UNKNOWN;
701 eh->ifunc_resolver_address = 0;
702 eh->ifunc_resolver_section = NULL;
708 /* Create an s390 ELF linker hash table. */
710 static struct bfd_link_hash_table *
711 elf_s390_link_hash_table_create (bfd *abfd)
713 struct elf_s390_link_hash_table *ret;
714 bfd_size_type amt = sizeof (struct elf_s390_link_hash_table);
716 ret = (struct elf_s390_link_hash_table *) bfd_zmalloc (amt);
720 if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc,
721 sizeof (struct elf_s390_link_hash_entry),
728 return &ret->elf.root;
731 /* Copy the extra info we tack onto an elf_link_hash_entry. */
734 elf_s390_copy_indirect_symbol (struct bfd_link_info *info,
735 struct elf_link_hash_entry *dir,
736 struct elf_link_hash_entry *ind)
738 struct elf_s390_link_hash_entry *edir, *eind;
740 edir = (struct elf_s390_link_hash_entry *) dir;
741 eind = (struct elf_s390_link_hash_entry *) ind;
743 if (eind->dyn_relocs != NULL)
745 if (edir->dyn_relocs != NULL)
747 struct elf_dyn_relocs **pp;
748 struct elf_dyn_relocs *p;
750 /* Add reloc counts against the indirect sym to the direct sym
751 list. Merge any entries against the same section. */
752 for (pp = &eind->dyn_relocs; (p = *pp) != NULL; )
754 struct elf_dyn_relocs *q;
756 for (q = edir->dyn_relocs; q != NULL; q = q->next)
757 if (q->sec == p->sec)
759 q->pc_count += p->pc_count;
760 q->count += p->count;
767 *pp = edir->dyn_relocs;
770 edir->dyn_relocs = eind->dyn_relocs;
771 eind->dyn_relocs = NULL;
774 if (ind->root.type == bfd_link_hash_indirect
775 && dir->got.refcount <= 0)
777 edir->tls_type = eind->tls_type;
778 eind->tls_type = GOT_UNKNOWN;
781 if (ELIMINATE_COPY_RELOCS
782 && ind->root.type != bfd_link_hash_indirect
783 && dir->dynamic_adjusted)
785 /* If called to transfer flags for a weakdef during processing
786 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
787 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
788 if (dir->versioned != versioned_hidden)
789 dir->ref_dynamic |= ind->ref_dynamic;
790 dir->ref_regular |= ind->ref_regular;
791 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
792 dir->needs_plt |= ind->needs_plt;
795 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
799 elf_s390_tls_transition (struct bfd_link_info *info,
803 if (bfd_link_pic (info))
811 return R_390_TLS_LE64;
812 return R_390_TLS_IE64;
813 case R_390_TLS_GOTIE64:
815 return R_390_TLS_LE64;
816 return R_390_TLS_GOTIE64;
817 case R_390_TLS_LDM64:
818 return R_390_TLS_LE64;
824 /* Look through the relocs for a section during the first phase, and
825 allocate space in the global offset table or procedure linkage
829 elf_s390_check_relocs (bfd *abfd,
830 struct bfd_link_info *info,
832 const Elf_Internal_Rela *relocs)
834 struct elf_s390_link_hash_table *htab;
835 Elf_Internal_Shdr *symtab_hdr;
836 struct elf_link_hash_entry **sym_hashes;
837 const Elf_Internal_Rela *rel;
838 const Elf_Internal_Rela *rel_end;
840 bfd_signed_vma *local_got_refcounts;
841 int tls_type, old_tls_type;
843 if (bfd_link_relocatable (info))
846 BFD_ASSERT (is_s390_elf (abfd));
848 htab = elf_s390_hash_table (info);
852 symtab_hdr = &elf_symtab_hdr (abfd);
853 sym_hashes = elf_sym_hashes (abfd);
854 local_got_refcounts = elf_local_got_refcounts (abfd);
858 rel_end = relocs + sec->reloc_count;
859 for (rel = relocs; rel < rel_end; rel++)
862 unsigned long r_symndx;
863 struct elf_link_hash_entry *h;
864 Elf_Internal_Sym *isym;
866 r_symndx = ELF64_R_SYM (rel->r_info);
868 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
870 /* xgettext:c-format */
871 _bfd_error_handler (_("%B: bad symbol index: %d"),
876 if (r_symndx < symtab_hdr->sh_info)
878 /* A local symbol. */
879 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
884 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
886 struct plt_entry *plt;
888 if (htab->elf.dynobj == NULL)
889 htab->elf.dynobj = abfd;
891 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
894 if (local_got_refcounts == NULL)
896 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
898 local_got_refcounts = elf_local_got_refcounts (abfd);
900 plt = elf_s390_local_plt (abfd);
901 plt[r_symndx].plt.refcount++;
907 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
908 while (h->root.type == bfd_link_hash_indirect
909 || h->root.type == bfd_link_hash_warning)
910 h = (struct elf_link_hash_entry *) h->root.u.i.link;
912 /* PR15323, ref flags aren't set for references in the same
914 h->root.non_ir_ref = 1;
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 /* Update the got entry reference counts for the section being removed. */
1335 elf_s390_gc_sweep_hook (bfd *abfd,
1336 struct bfd_link_info *info,
1338 const Elf_Internal_Rela *relocs)
1340 struct elf_s390_link_hash_table *htab;
1341 Elf_Internal_Shdr *symtab_hdr;
1342 struct elf_link_hash_entry **sym_hashes;
1343 bfd_signed_vma *local_got_refcounts;
1344 const Elf_Internal_Rela *rel, *relend;
1346 if (bfd_link_relocatable (info))
1349 htab = elf_s390_hash_table (info);
1353 elf_section_data (sec)->local_dynrel = NULL;
1355 symtab_hdr = &elf_symtab_hdr (abfd);
1356 sym_hashes = elf_sym_hashes (abfd);
1357 local_got_refcounts = elf_local_got_refcounts (abfd);
1359 relend = relocs + sec->reloc_count;
1360 for (rel = relocs; rel < relend; rel++)
1362 unsigned long r_symndx;
1363 unsigned int r_type;
1364 struct elf_link_hash_entry *h = NULL;
1366 r_symndx = ELF64_R_SYM (rel->r_info);
1367 if (r_symndx >= symtab_hdr->sh_info)
1369 struct elf_s390_link_hash_entry *eh;
1370 struct elf_dyn_relocs **pp;
1371 struct elf_dyn_relocs *p;
1373 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1374 while (h->root.type == bfd_link_hash_indirect
1375 || h->root.type == bfd_link_hash_warning)
1376 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1377 eh = (struct elf_s390_link_hash_entry *) h;
1379 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1382 /* Everything must go for SEC. */
1389 Elf_Internal_Sym *isym;
1391 /* A local symbol. */
1392 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1397 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1399 struct plt_entry *plt = elf_s390_local_plt (abfd);
1400 if (plt[r_symndx].plt.refcount > 0)
1401 plt[r_symndx].plt.refcount--;
1405 r_type = ELF64_R_TYPE (rel->r_info);
1406 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1409 case R_390_TLS_LDM64:
1410 if (htab->tls_ldm_got.refcount > 0)
1411 htab->tls_ldm_got.refcount -= 1;
1413 case R_390_GOTOFF16:
1414 case R_390_GOTOFF32:
1415 case R_390_GOTOFF64:
1416 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1423 case R_390_GOTPCDBL:
1426 case R_390_TLS_GD64:
1427 case R_390_TLS_IE64:
1428 case R_390_TLS_GOTIE12:
1429 case R_390_TLS_GOTIE20:
1430 case R_390_TLS_GOTIE64:
1431 case R_390_TLS_IEENT:
1440 if (h->got.refcount > 0)
1441 h->got.refcount -= 1;
1443 else if (local_got_refcounts != NULL)
1445 if (local_got_refcounts[r_symndx] > 0)
1446 local_got_refcounts[r_symndx] -= 1;
1463 if (bfd_link_pic (info))
1467 case R_390_PLT12DBL:
1468 case R_390_PLT16DBL:
1469 case R_390_PLT24DBL:
1471 case R_390_PLT32DBL:
1473 case R_390_PLTOFF16:
1474 case R_390_PLTOFF32:
1475 case R_390_PLTOFF64:
1478 if (h->plt.refcount > 0)
1479 h->plt.refcount -= 1;
1483 case R_390_GOTPLT12:
1484 case R_390_GOTPLT16:
1485 case R_390_GOTPLT20:
1486 case R_390_GOTPLT32:
1487 case R_390_GOTPLT64:
1488 case R_390_GOTPLTENT:
1491 if (h->plt.refcount > 0)
1493 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1494 h->plt.refcount -= 1;
1497 else if (local_got_refcounts != NULL)
1499 if (local_got_refcounts[r_symndx] > 0)
1500 local_got_refcounts[r_symndx] -= 1;
1512 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1513 entry but we found we will not create any. Called when we find we will
1514 not have any PLT for this symbol, by for example
1515 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1516 or elf_s390_size_dynamic_sections if no dynamic sections will be
1517 created (we're only linking static objects). */
1520 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1522 if (h->elf.root.type == bfd_link_hash_warning)
1523 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1525 if (h->gotplt_refcount <= 0)
1528 /* We simply add the number of gotplt references to the number
1529 * of got references for this symbol. */
1530 h->elf.got.refcount += h->gotplt_refcount;
1531 h->gotplt_refcount = -1;
1534 /* Adjust a symbol defined by a dynamic object and referenced by a
1535 regular object. The current definition is in some section of the
1536 dynamic object, but we're not including those sections. We have to
1537 change the definition to something the rest of the link can
1541 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1542 struct elf_link_hash_entry *h)
1544 struct elf_s390_link_hash_table *htab;
1547 /* STT_GNU_IFUNC symbol must go through PLT. */
1548 if (s390_is_ifunc_symbol_p (h))
1550 /* All local STT_GNU_IFUNC references must be treated as local
1551 calls via local PLT. */
1552 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1554 bfd_size_type pc_count = 0, count = 0;
1555 struct elf_dyn_relocs **pp;
1556 struct elf_s390_link_hash_entry *eh;
1557 struct elf_dyn_relocs *p;
1559 eh = (struct elf_s390_link_hash_entry *) h;
1560 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1562 pc_count += p->pc_count;
1563 p->count -= p->pc_count;
1572 if (pc_count || count)
1576 if (h->plt.refcount <= 0)
1577 h->plt.refcount = 1;
1579 h->plt.refcount += 1;
1583 if (h->plt.refcount <= 0)
1585 h->plt.offset = (bfd_vma) -1;
1591 /* If this is a function, put it in the procedure linkage table. We
1592 will fill in the contents of the procedure linkage table later
1593 (although we could actually do it here). */
1594 if (h->type == STT_FUNC
1597 if (h->plt.refcount <= 0
1598 || SYMBOL_CALLS_LOCAL (info, h)
1599 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1600 && h->root.type == bfd_link_hash_undefweak))
1602 /* This case can occur if we saw a PLT32 reloc in an input
1603 file, but the symbol was never referred to by a dynamic
1604 object, or if all references were garbage collected. In
1605 such a case, we don't actually need to build a procedure
1606 linkage table, and we can just do a PC32 reloc instead. */
1607 h->plt.offset = (bfd_vma) -1;
1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1615 /* It's possible that we incorrectly decided a .plt reloc was
1616 needed for an R_390_PC32 reloc to a non-function sym in
1617 check_relocs. We can't decide accurately between function and
1618 non-function syms in check-relocs; Objects loaded later in
1619 the link may change h->type. So fix it now. */
1620 h->plt.offset = (bfd_vma) -1;
1622 /* If this is a weak symbol, and there is a real definition, the
1623 processor independent code will have arranged for us to see the
1624 real definition first, and we can just use the same value. */
1625 if (h->u.weakdef != NULL)
1627 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1628 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1629 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1630 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1631 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1632 h->non_got_ref = h->u.weakdef->non_got_ref;
1636 /* This is a reference to a symbol defined by a dynamic object which
1637 is not a function. */
1639 /* If we are creating a shared library, we must presume that the
1640 only references to the symbol are via the global offset table.
1641 For such cases we need not do anything here; the relocations will
1642 be handled correctly by relocate_section. */
1643 if (bfd_link_pic (info))
1646 /* If there are no references to this symbol that do not use the
1647 GOT, we don't need to generate a copy reloc. */
1648 if (!h->non_got_ref)
1651 /* If -z nocopyreloc was given, we won't generate them either. */
1652 if (info->nocopyreloc)
1658 if (ELIMINATE_COPY_RELOCS)
1660 struct elf_s390_link_hash_entry * eh;
1661 struct elf_dyn_relocs *p;
1663 eh = (struct elf_s390_link_hash_entry *) h;
1664 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1666 s = p->sec->output_section;
1667 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1671 /* If we didn't find any dynamic relocs in read-only sections, then
1672 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1680 /* We must allocate the symbol in our .dynbss section, which will
1681 become part of the .bss section of the executable. There will be
1682 an entry for this symbol in the .dynsym section. The dynamic
1683 object will contain position independent code, so all references
1684 from the dynamic object to this symbol will go through the global
1685 offset table. The dynamic linker will use the .dynsym entry to
1686 determine the address it must put in the global offset table, so
1687 both the dynamic object and the regular object will refer to the
1688 same memory location for the variable. */
1690 htab = elf_s390_hash_table (info);
1694 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1695 copy the initial value out of the dynamic object and into the
1696 runtime process image. */
1697 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1699 s = htab->elf.sdynrelro;
1700 srel = htab->elf.sreldynrelro;
1704 s = htab->elf.sdynbss;
1705 srel = htab->elf.srelbss;
1707 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1709 srel->size += sizeof (Elf64_External_Rela);
1713 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1716 /* Allocate space in .plt, .got and associated reloc sections for
1720 allocate_dynrelocs (struct elf_link_hash_entry *h,
1723 struct bfd_link_info *info;
1724 struct elf_s390_link_hash_table *htab;
1725 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1726 struct elf_dyn_relocs *p;
1728 if (h->root.type == bfd_link_hash_indirect)
1731 info = (struct bfd_link_info *) inf;
1732 htab = elf_s390_hash_table (info);
1736 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1737 here if it is defined and referenced in a non-shared object. */
1738 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1739 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1740 else if (htab->elf.dynamic_sections_created
1741 && h->plt.refcount > 0)
1743 /* Make sure this symbol is output as a dynamic symbol.
1744 Undefined weak syms won't yet be marked as dynamic. */
1745 if (h->dynindx == -1
1746 && !h->forced_local)
1748 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1752 if (bfd_link_pic (info)
1753 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1755 asection *s = htab->elf.splt;
1757 /* If this is the first .plt entry, make room for the special
1760 s->size += PLT_FIRST_ENTRY_SIZE;
1762 h->plt.offset = s->size;
1764 /* If this symbol is not defined in a regular file, and we are
1765 not generating a shared library, then set the symbol to this
1766 location in the .plt. This is required to make function
1767 pointers compare as equal between the normal executable and
1768 the shared library. */
1769 if (! bfd_link_pic (info)
1772 h->root.u.def.section = s;
1773 h->root.u.def.value = h->plt.offset;
1776 /* Make room for this entry. */
1777 s->size += PLT_ENTRY_SIZE;
1779 /* We also need to make an entry in the .got.plt section, which
1780 will be placed in the .got section by the linker script. */
1781 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1783 /* We also need to make an entry in the .rela.plt section. */
1784 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1788 h->plt.offset = (bfd_vma) -1;
1790 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1795 h->plt.offset = (bfd_vma) -1;
1797 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1800 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1801 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1802 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1803 we can save the dynamic TLS relocation. */
1804 if (h->got.refcount > 0
1805 && !bfd_link_pic (info)
1807 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1809 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1810 /* For the GOTIE access without a literal pool entry the offset has
1811 to be stored somewhere. The immediate value in the instruction
1812 is not bit enough so the value is stored in the got. */
1814 h->got.offset = htab->elf.sgot->size;
1815 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1818 h->got.offset = (bfd_vma) -1;
1820 else if (h->got.refcount > 0)
1824 int tls_type = elf_s390_hash_entry(h)->tls_type;
1826 /* Make sure this symbol is output as a dynamic symbol.
1827 Undefined weak syms won't yet be marked as dynamic. */
1828 if (h->dynindx == -1
1829 && !h->forced_local)
1831 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1836 h->got.offset = s->size;
1837 s->size += GOT_ENTRY_SIZE;
1838 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1839 if (tls_type == GOT_TLS_GD)
1840 s->size += GOT_ENTRY_SIZE;
1841 dyn = htab->elf.dynamic_sections_created;
1842 /* R_390_TLS_IE64 needs one dynamic relocation,
1843 R_390_TLS_GD64 needs one if local symbol and two if global. */
1844 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1845 || tls_type >= GOT_TLS_IE)
1846 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1847 else if (tls_type == GOT_TLS_GD)
1848 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1849 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1850 || h->root.type != bfd_link_hash_undefweak)
1851 && (bfd_link_pic (info)
1852 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1853 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1856 h->got.offset = (bfd_vma) -1;
1858 if (eh->dyn_relocs == NULL)
1861 /* In the shared -Bsymbolic case, discard space allocated for
1862 dynamic pc-relative relocs against symbols which turn out to be
1863 defined in regular objects. For the normal shared case, discard
1864 space for pc-relative relocs that have become local due to symbol
1865 visibility changes. */
1867 if (bfd_link_pic (info))
1869 if (SYMBOL_CALLS_LOCAL (info, h))
1871 struct elf_dyn_relocs **pp;
1873 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1875 p->count -= p->pc_count;
1884 /* Also discard relocs on undefined weak syms with non-default
1886 if (eh->dyn_relocs != NULL
1887 && h->root.type == bfd_link_hash_undefweak)
1889 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1890 eh->dyn_relocs = NULL;
1892 /* Make sure undefined weak symbols are output as a dynamic
1894 else if (h->dynindx == -1
1895 && !h->forced_local)
1897 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1902 else if (ELIMINATE_COPY_RELOCS)
1904 /* For the non-shared case, discard space for relocs against
1905 symbols which turn out to need copy relocs or are not
1911 || (htab->elf.dynamic_sections_created
1912 && (h->root.type == bfd_link_hash_undefweak
1913 || h->root.type == bfd_link_hash_undefined))))
1915 /* Make sure this symbol is output as a dynamic symbol.
1916 Undefined weak syms won't yet be marked as dynamic. */
1917 if (h->dynindx == -1
1918 && !h->forced_local)
1920 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1924 /* If that succeeded, we know we'll be keeping all the
1926 if (h->dynindx != -1)
1930 eh->dyn_relocs = NULL;
1935 /* Finally, allocate space. */
1936 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1938 asection *sreloc = elf_section_data (p->sec)->sreloc;
1939 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1945 /* Find any dynamic relocs that apply to read-only sections. */
1948 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1950 struct elf_s390_link_hash_entry *eh;
1951 struct elf_dyn_relocs *p;
1953 eh = (struct elf_s390_link_hash_entry *) h;
1954 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1956 asection *s = p->sec->output_section;
1958 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1960 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1962 info->flags |= DF_TEXTREL;
1964 /* Not an error, just cut short the traversal. */
1971 /* Set the sizes of the dynamic sections. */
1974 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1975 struct bfd_link_info *info)
1977 struct elf_s390_link_hash_table *htab;
1983 htab = elf_s390_hash_table (info);
1987 dynobj = htab->elf.dynobj;
1991 if (htab->elf.dynamic_sections_created)
1993 /* Set the contents of the .interp section to the interpreter. */
1994 if (bfd_link_executable (info) && !info->nointerp)
1996 s = bfd_get_linker_section (dynobj, ".interp");
1999 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
2000 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2004 /* Set up .got offsets for local syms, and space for local dynamic
2006 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2008 bfd_signed_vma *local_got;
2009 bfd_signed_vma *end_local_got;
2010 char *local_tls_type;
2011 bfd_size_type locsymcount;
2012 Elf_Internal_Shdr *symtab_hdr;
2014 struct plt_entry *local_plt;
2017 if (! is_s390_elf (ibfd))
2020 for (s = ibfd->sections; s != NULL; s = s->next)
2022 struct elf_dyn_relocs *p;
2024 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2026 if (!bfd_is_abs_section (p->sec)
2027 && bfd_is_abs_section (p->sec->output_section))
2029 /* Input section has been discarded, either because
2030 it is a copy of a linkonce section or due to
2031 linker script /DISCARD/, so we'll be discarding
2034 else if (p->count != 0)
2036 srela = elf_section_data (p->sec)->sreloc;
2037 srela->size += p->count * sizeof (Elf64_External_Rela);
2038 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2039 info->flags |= DF_TEXTREL;
2044 local_got = elf_local_got_refcounts (ibfd);
2048 symtab_hdr = &elf_symtab_hdr (ibfd);
2049 locsymcount = symtab_hdr->sh_info;
2050 end_local_got = local_got + locsymcount;
2051 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2053 srela = htab->elf.srelgot;
2054 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2058 *local_got = s->size;
2059 s->size += GOT_ENTRY_SIZE;
2060 if (*local_tls_type == GOT_TLS_GD)
2061 s->size += GOT_ENTRY_SIZE;
2062 if (bfd_link_pic (info))
2063 srela->size += sizeof (Elf64_External_Rela);
2066 *local_got = (bfd_vma) -1;
2069 local_plt = elf_s390_local_plt (ibfd);
2070 for (i = 0; i < symtab_hdr->sh_info; i++)
2072 if (local_plt[i].plt.refcount > 0)
2074 local_plt[i].plt.offset = htab->elf.iplt->size;
2075 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2076 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2077 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2080 local_plt[i].plt.offset = (bfd_vma) -1;
2084 if (htab->tls_ldm_got.refcount > 0)
2086 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2088 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2089 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2090 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2093 htab->tls_ldm_got.offset = -1;
2095 /* Allocate global sym .plt and .got entries, and space for global
2096 sym dynamic relocs. */
2097 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2099 /* We now have determined the sizes of the various dynamic sections.
2100 Allocate memory for them. */
2102 for (s = dynobj->sections; s != NULL; s = s->next)
2104 if ((s->flags & SEC_LINKER_CREATED) == 0)
2107 if (s == htab->elf.splt
2108 || s == htab->elf.sgot
2109 || s == htab->elf.sgotplt
2110 || s == htab->elf.sdynbss
2111 || s == htab->elf.sdynrelro
2112 || s == htab->elf.iplt
2113 || s == htab->elf.igotplt
2114 || s == htab->irelifunc)
2116 /* Strip this section if we don't need it; see the
2119 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2121 if (s->size != 0 && s != htab->elf.srelplt)
2124 /* We use the reloc_count field as a counter if we need
2125 to copy relocs into the output file. */
2130 /* It's not one of our sections, so don't allocate space. */
2136 /* If we don't need this section, strip it from the
2137 output file. This is to handle .rela.bss and
2138 .rela.plt. We must create it in
2139 create_dynamic_sections, because it must be created
2140 before the linker maps input sections to output
2141 sections. The linker does that before
2142 adjust_dynamic_symbol is called, and it is that
2143 function which decides whether anything needs to go
2144 into these sections. */
2146 s->flags |= SEC_EXCLUDE;
2150 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2153 /* Allocate memory for the section contents. We use bfd_zalloc
2154 here in case unused entries are not reclaimed before the
2155 section's contents are written out. This should not happen,
2156 but this way if it does, we get a R_390_NONE reloc instead
2158 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2159 if (s->contents == NULL)
2163 if (htab->elf.dynamic_sections_created)
2165 /* Add some entries to the .dynamic section. We fill in the
2166 values later, in elf_s390_finish_dynamic_sections, but we
2167 must add the entries now so that we get the correct size for
2168 the .dynamic section. The DT_DEBUG entry is filled in by the
2169 dynamic linker and used by the debugger. */
2170 #define add_dynamic_entry(TAG, VAL) \
2171 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2173 if (bfd_link_executable (info))
2175 if (!add_dynamic_entry (DT_DEBUG, 0))
2179 if (htab->elf.splt->size != 0)
2181 if (!add_dynamic_entry (DT_PLTGOT, 0)
2182 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2183 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2184 || !add_dynamic_entry (DT_JMPREL, 0))
2190 if (!add_dynamic_entry (DT_RELA, 0)
2191 || !add_dynamic_entry (DT_RELASZ, 0)
2192 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2195 /* If any dynamic relocs apply to a read-only section,
2196 then we need a DT_TEXTREL entry. */
2197 if ((info->flags & DF_TEXTREL) == 0)
2198 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2201 if ((info->flags & DF_TEXTREL) != 0)
2203 if (!add_dynamic_entry (DT_TEXTREL, 0))
2208 #undef add_dynamic_entry
2213 /* Return the base VMA address which should be subtracted from real addresses
2214 when resolving @dtpoff relocation.
2215 This is PT_TLS segment p_vaddr. */
2218 dtpoff_base (struct bfd_link_info *info)
2220 /* If tls_sec is NULL, we should have signalled an error already. */
2221 if (elf_hash_table (info)->tls_sec == NULL)
2223 return elf_hash_table (info)->tls_sec->vma;
2226 /* Return the relocation value for @tpoff relocation
2227 if STT_TLS virtual address is ADDRESS. */
2230 tpoff (struct bfd_link_info *info, bfd_vma address)
2232 struct elf_link_hash_table *htab = elf_hash_table (info);
2234 /* If tls_sec is NULL, we should have signalled an error already. */
2235 if (htab->tls_sec == NULL)
2237 return htab->tls_size + htab->tls_sec->vma - address;
2240 /* Complain if TLS instruction relocation is against an invalid
2244 invalid_tls_insn (bfd *input_bfd,
2245 asection *input_section,
2246 Elf_Internal_Rela *rel)
2248 reloc_howto_type *howto;
2250 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2252 /* xgettext:c-format */
2253 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2256 (long) rel->r_offset,
2258 bfd_set_error (bfd_error_bad_value);
2261 /* Relocate a 390 ELF section. */
2264 elf_s390_relocate_section (bfd *output_bfd,
2265 struct bfd_link_info *info,
2267 asection *input_section,
2269 Elf_Internal_Rela *relocs,
2270 Elf_Internal_Sym *local_syms,
2271 asection **local_sections)
2273 struct elf_s390_link_hash_table *htab;
2274 Elf_Internal_Shdr *symtab_hdr;
2275 struct elf_link_hash_entry **sym_hashes;
2276 bfd_vma *local_got_offsets;
2277 Elf_Internal_Rela *rel;
2278 Elf_Internal_Rela *relend;
2280 BFD_ASSERT (is_s390_elf (input_bfd));
2282 htab = elf_s390_hash_table (info);
2286 symtab_hdr = &elf_symtab_hdr (input_bfd);
2287 sym_hashes = elf_sym_hashes (input_bfd);
2288 local_got_offsets = elf_local_got_offsets (input_bfd);
2291 relend = relocs + input_section->reloc_count;
2292 for (; rel < relend; rel++)
2294 unsigned int r_type;
2295 reloc_howto_type *howto;
2296 unsigned long r_symndx;
2297 struct elf_link_hash_entry *h;
2298 Elf_Internal_Sym *sym;
2302 bfd_boolean unresolved_reloc;
2303 bfd_reloc_status_type r;
2305 asection *base_got = htab->elf.sgot;
2307 r_type = ELF64_R_TYPE (rel->r_info);
2308 if (r_type == (int) R_390_GNU_VTINHERIT
2309 || r_type == (int) R_390_GNU_VTENTRY)
2311 if (r_type >= (int) R_390_max)
2313 bfd_set_error (bfd_error_bad_value);
2317 howto = elf_howto_table + r_type;
2318 r_symndx = ELF64_R_SYM (rel->r_info);
2323 unresolved_reloc = FALSE;
2324 if (r_symndx < symtab_hdr->sh_info)
2326 sym = local_syms + r_symndx;
2327 sec = local_sections[r_symndx];
2329 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2331 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2332 if (local_plt == NULL)
2335 /* Address of the PLT slot. */
2336 relocation = (htab->elf.iplt->output_section->vma
2337 + htab->elf.iplt->output_offset
2338 + local_plt[r_symndx].plt.offset);
2342 case R_390_PLTOFF16:
2343 case R_390_PLTOFF32:
2344 case R_390_PLTOFF64:
2345 relocation -= htab->elf.sgot->output_section->vma;
2347 case R_390_GOTPLT12:
2348 case R_390_GOTPLT16:
2349 case R_390_GOTPLT20:
2350 case R_390_GOTPLT32:
2351 case R_390_GOTPLT64:
2352 case R_390_GOTPLTENT:
2360 /* Write the PLT slot address into the GOT slot. */
2361 bfd_put_64 (output_bfd, relocation,
2362 htab->elf.sgot->contents +
2363 local_got_offsets[r_symndx]);
2364 relocation = (local_got_offsets[r_symndx] +
2365 htab->elf.sgot->output_offset);
2367 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2368 relocation += htab->elf.sgot->output_section->vma;
2374 /* The output section is needed later in
2375 finish_dynamic_section when creating the dynamic
2377 local_plt[r_symndx].sec = sec;
2381 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2385 bfd_boolean warned ATTRIBUTE_UNUSED;
2386 bfd_boolean ignored ATTRIBUTE_UNUSED;
2388 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2389 r_symndx, symtab_hdr, sym_hashes,
2391 unresolved_reloc, warned, ignored);
2394 if (sec != NULL && discarded_section (sec))
2395 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2396 rel, 1, relend, howto, 0, contents);
2398 if (bfd_link_relocatable (info))
2403 case R_390_GOTPLT12:
2404 case R_390_GOTPLT16:
2405 case R_390_GOTPLT20:
2406 case R_390_GOTPLT32:
2407 case R_390_GOTPLT64:
2408 case R_390_GOTPLTENT:
2409 /* There are three cases for a GOTPLT relocation. 1) The
2410 relocation is against the jump slot entry of a plt that
2411 will get emitted to the output file. 2) The relocation
2412 is against the jump slot of a plt entry that has been
2413 removed. elf_s390_adjust_gotplt has created a GOT entry
2414 as replacement. 3) The relocation is against a local symbol.
2415 Cases 2) and 3) are the same as the GOT relocation code
2416 so we just have to test for case 1 and fall through for
2418 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2422 if (s390_is_ifunc_symbol_p (h))
2424 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2425 relocation = (plt_index * GOT_ENTRY_SIZE +
2426 htab->elf.igotplt->output_offset);
2427 if (r_type == R_390_GOTPLTENT)
2428 relocation += htab->elf.igotplt->output_section->vma;
2433 Current offset - size first entry / entry size. */
2434 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2437 /* Offset in GOT is PLT index plus GOT headers(3)
2438 times 8, addr & GOT addr. */
2439 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2440 if (r_type == R_390_GOTPLTENT)
2441 relocation += htab->elf.sgot->output_section->vma;
2443 unresolved_reloc = FALSE;
2454 /* Relocation is to the entry for this symbol in the global
2456 if (base_got == NULL)
2463 off = h->got.offset;
2464 dyn = htab->elf.dynamic_sections_created;
2466 if (s390_is_ifunc_symbol_p (h))
2468 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2469 if (off == (bfd_vma)-1)
2471 /* No explicit GOT usage so redirect to the
2473 base_got = htab->elf.igotplt;
2474 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2478 /* Explicit GOT slots must contain the address
2479 of the PLT slot. This will be handled in
2480 finish_dynamic_symbol. */
2483 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2484 bfd_link_pic (info),
2486 || (bfd_link_pic (info)
2487 && SYMBOL_REFERENCES_LOCAL (info, h))
2488 || (ELF_ST_VISIBILITY (h->other)
2489 && h->root.type == bfd_link_hash_undefweak))
2491 /* This is actually a static link, or it is a
2492 -Bsymbolic link and the symbol is defined
2493 locally, or the symbol was forced to be local
2494 because of a version file. We must initialize
2495 this entry in the global offset table. Since the
2496 offset must always be a multiple of 2, we use the
2497 least significant bit to record whether we have
2498 initialized it already.
2500 When doing a dynamic link, we create a .rel.got
2501 relocation entry to initialize the value. This
2502 is done in the finish_dynamic_symbol routine. */
2507 bfd_put_64 (output_bfd, relocation,
2508 base_got->contents + off);
2513 && bfd_link_pic (info)
2514 && SYMBOL_REFERENCES_LOCAL (info, h))
2515 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2516 && ((r_type == R_390_GOTENT
2517 && (bfd_get_16 (input_bfd,
2518 contents + rel->r_offset - 2)
2519 & 0xff0f) == 0xc408)
2520 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2521 || (r_type == R_390_GOT20
2522 && (bfd_get_32 (input_bfd,
2523 contents + rel->r_offset - 2)
2524 & 0xff00f000) == 0xe300c000
2525 && bfd_get_8 (input_bfd,
2526 contents + rel->r_offset + 3) == 0x04)))
2529 unsigned short new_insn =
2530 (0xc000 | (bfd_get_8 (input_bfd,
2531 contents + rel->r_offset - 1) & 0xf0));
2532 bfd_put_16 (output_bfd, new_insn,
2533 contents + rel->r_offset - 2);
2534 r_type = R_390_PC32DBL;
2536 howto = elf_howto_table + r_type;
2537 relocation = h->root.u.def.value
2538 + h->root.u.def.section->output_section->vma
2539 + h->root.u.def.section->output_offset;
2544 unresolved_reloc = FALSE;
2548 if (local_got_offsets == NULL)
2551 off = local_got_offsets[r_symndx];
2553 /* The offset must always be a multiple of 8. We use
2554 the least significant bit to record whether we have
2555 already generated the necessary reloc. */
2560 bfd_put_64 (output_bfd, relocation,
2561 htab->elf.sgot->contents + off);
2563 if (bfd_link_pic (info))
2566 Elf_Internal_Rela outrel;
2569 s = htab->elf.srelgot;
2573 outrel.r_offset = (htab->elf.sgot->output_section->vma
2574 + htab->elf.sgot->output_offset
2576 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2577 outrel.r_addend = relocation;
2579 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2580 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2583 local_got_offsets[r_symndx] |= 1;
2587 if (off >= (bfd_vma) -2)
2590 relocation = base_got->output_offset + off;
2592 /* For @GOTENT the relocation is against the offset between
2593 the instruction and the symbols entry in the GOT and not
2594 between the start of the GOT and the symbols entry. We
2595 add the vma of the GOT to get the correct value. */
2596 if ( r_type == R_390_GOTENT
2597 || r_type == R_390_GOTPLTENT)
2598 relocation += base_got->output_section->vma;
2602 case R_390_GOTOFF16:
2603 case R_390_GOTOFF32:
2604 case R_390_GOTOFF64:
2605 /* Relocation is relative to the start of the global offset
2609 && s390_is_ifunc_symbol_p (h)
2611 && !bfd_link_executable (info))
2613 relocation = (htab->elf.iplt->output_section->vma
2614 + htab->elf.iplt->output_offset
2616 - htab->elf.sgot->output_section->vma);
2620 /* Note that sgot->output_offset is not involved in this
2621 calculation. We always want the start of .got. If we
2622 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2623 permitted by the ABI, we might have to change this
2625 relocation -= htab->elf.sgot->output_section->vma;
2629 case R_390_GOTPCDBL:
2630 /* Use global offset table as symbol value. */
2631 relocation = htab->elf.sgot->output_section->vma;
2632 unresolved_reloc = FALSE;
2635 case R_390_PLT12DBL:
2636 case R_390_PLT16DBL:
2637 case R_390_PLT24DBL:
2639 case R_390_PLT32DBL:
2641 /* Relocation is to the entry for this symbol in the
2642 procedure linkage table. */
2644 /* Resolve a PLT32 reloc against a local symbol directly,
2645 without using the procedure linkage table. */
2649 if (h->plt.offset == (bfd_vma) -1
2650 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2652 /* We didn't make a PLT entry for this symbol. This
2653 happens when statically linking PIC code, or when
2654 using -Bsymbolic. */
2657 if (s390_is_ifunc_symbol_p (h))
2658 relocation = (htab->elf.iplt->output_section->vma
2659 + htab->elf.iplt->output_offset
2662 relocation = (htab->elf.splt->output_section->vma
2663 + htab->elf.splt->output_offset
2665 unresolved_reloc = FALSE;
2668 case R_390_PLTOFF16:
2669 case R_390_PLTOFF32:
2670 case R_390_PLTOFF64:
2671 /* Relocation is to the entry for this symbol in the
2672 procedure linkage table relative to the start of the GOT. */
2674 /* For local symbols or if we didn't make a PLT entry for
2675 this symbol resolve the symbol directly. */
2677 || h->plt.offset == (bfd_vma) -1
2678 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2680 relocation -= htab->elf.sgot->output_section->vma;
2684 if (s390_is_ifunc_symbol_p (h))
2685 relocation = (htab->elf.iplt->output_section->vma
2686 + htab->elf.iplt->output_offset
2688 - htab->elf.sgot->output_section->vma);
2690 relocation = (htab->elf.splt->output_section->vma
2691 + htab->elf.splt->output_offset
2693 - htab->elf.sgot->output_section->vma);
2694 unresolved_reloc = FALSE;
2705 && bfd_link_pie (info)
2708 _bfd_error_handler (_("%B: `%s' non-PLT reloc for symbol defined "
2709 "in shared library and accessed "
2711 "(rebuild file with -fPIC ?)"),
2712 input_bfd, h->root.root.string);
2713 bfd_set_error (bfd_error_bad_value);
2716 /* The target of these relocs are instruction operands
2717 residing in read-only sections. We cannot emit a runtime
2720 && s390_is_ifunc_symbol_p (h)
2722 && bfd_link_pic (info))
2724 relocation = (htab->elf.iplt->output_section->vma
2725 + htab->elf.iplt->output_offset
2737 && s390_is_ifunc_symbol_p (h)
2740 if (!bfd_link_pic (info) || !h->non_got_ref)
2742 /* For a non-shared object STT_GNU_IFUNC symbol must
2744 relocation = (htab->elf.iplt->output_section->vma
2745 + htab->elf.iplt->output_offset
2751 /* For shared objects a runtime relocation is needed. */
2753 Elf_Internal_Rela outrel;
2756 /* Need a dynamic relocation to get the real function
2758 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2762 if (outrel.r_offset == (bfd_vma) -1
2763 || outrel.r_offset == (bfd_vma) -2)
2766 outrel.r_offset += (input_section->output_section->vma
2767 + input_section->output_offset);
2769 if (h->dynindx == -1
2771 || bfd_link_executable (info))
2773 /* This symbol is resolved locally. */
2774 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2775 outrel.r_addend = (h->root.u.def.value
2776 + h->root.u.def.section->output_section->vma
2777 + h->root.u.def.section->output_offset);
2781 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2782 outrel.r_addend = 0;
2785 sreloc = htab->elf.irelifunc;
2786 elf_append_rela (output_bfd, sreloc, &outrel);
2788 /* If this reloc is against an external symbol, we
2789 do not want to fiddle with the addend. Otherwise,
2790 we need to include the symbol value so that it
2791 becomes an addend for the dynamic reloc. For an
2792 internal symbol, we have updated addend. */
2797 if ((input_section->flags & SEC_ALLOC) == 0)
2800 if ((bfd_link_pic (info)
2802 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2803 || h->root.type != bfd_link_hash_undefweak)
2804 && ((r_type != R_390_PC16
2805 && r_type != R_390_PC12DBL
2806 && r_type != R_390_PC16DBL
2807 && r_type != R_390_PC24DBL
2808 && r_type != R_390_PC32
2809 && r_type != R_390_PC32DBL
2810 && r_type != R_390_PC64)
2811 || !SYMBOL_CALLS_LOCAL (info, h)))
2812 || (ELIMINATE_COPY_RELOCS
2813 && !bfd_link_pic (info)
2819 || h->root.type == bfd_link_hash_undefweak
2820 || h->root.type == bfd_link_hash_undefined)))
2822 Elf_Internal_Rela outrel;
2823 bfd_boolean skip, relocate;
2827 /* When generating a shared object, these relocations
2828 are copied into the output file to be resolved at run
2834 _bfd_elf_section_offset (output_bfd, info, input_section,
2836 if (outrel.r_offset == (bfd_vma) -1)
2838 else if (outrel.r_offset == (bfd_vma) -2)
2839 skip = TRUE, relocate = TRUE;
2841 outrel.r_offset += (input_section->output_section->vma
2842 + input_section->output_offset);
2845 memset (&outrel, 0, sizeof outrel);
2848 && (r_type == R_390_PC16
2849 || r_type == R_390_PC12DBL
2850 || r_type == R_390_PC16DBL
2851 || r_type == R_390_PC24DBL
2852 || r_type == R_390_PC32
2853 || r_type == R_390_PC32DBL
2854 || r_type == R_390_PC64
2855 || !bfd_link_pic (info)
2856 || !SYMBOLIC_BIND (info, h)
2857 || !h->def_regular))
2859 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2860 outrel.r_addend = rel->r_addend;
2864 /* This symbol is local, or marked to become local. */
2865 outrel.r_addend = relocation + rel->r_addend;
2866 if (r_type == R_390_64)
2869 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2875 if (bfd_is_abs_section (sec))
2877 else if (sec == NULL || sec->owner == NULL)
2879 bfd_set_error(bfd_error_bad_value);
2886 osec = sec->output_section;
2887 sindx = elf_section_data (osec)->dynindx;
2891 osec = htab->elf.text_index_section;
2892 sindx = elf_section_data (osec)->dynindx;
2894 BFD_ASSERT (sindx != 0);
2896 /* We are turning this relocation into one
2897 against a section symbol, so subtract out
2898 the output section's address but not the
2899 offset of the input section in the output
2901 outrel.r_addend -= osec->vma;
2903 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2907 sreloc = elf_section_data (input_section)->sreloc;
2911 loc = sreloc->contents;
2912 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2913 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2915 /* If this reloc is against an external symbol, we do
2916 not want to fiddle with the addend. Otherwise, we
2917 need to include the symbol value so that it becomes
2918 an addend for the dynamic reloc. */
2925 /* Relocations for tls literal pool entries. */
2926 case R_390_TLS_IE64:
2927 if (bfd_link_pic (info))
2929 Elf_Internal_Rela outrel;
2933 outrel.r_offset = rel->r_offset
2934 + input_section->output_section->vma
2935 + input_section->output_offset;
2936 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2937 sreloc = elf_section_data (input_section)->sreloc;
2940 loc = sreloc->contents;
2941 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2942 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2946 case R_390_TLS_GD64:
2947 case R_390_TLS_GOTIE64:
2948 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2949 tls_type = GOT_UNKNOWN;
2950 if (h == NULL && local_got_offsets)
2951 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2954 tls_type = elf_s390_hash_entry(h)->tls_type;
2955 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2956 r_type = R_390_TLS_LE64;
2958 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2959 r_type = R_390_TLS_IE64;
2961 if (r_type == R_390_TLS_LE64)
2963 /* This relocation gets optimized away by the local exec
2964 access optimization. */
2965 BFD_ASSERT (! unresolved_reloc);
2966 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2967 contents + rel->r_offset);
2971 if (htab->elf.sgot == NULL)
2975 off = h->got.offset;
2978 if (local_got_offsets == NULL)
2981 off = local_got_offsets[r_symndx];
2990 Elf_Internal_Rela outrel;
2994 if (htab->elf.srelgot == NULL)
2997 outrel.r_offset = (htab->elf.sgot->output_section->vma
2998 + htab->elf.sgot->output_offset + off);
3000 indx = h && h->dynindx != -1 ? h->dynindx : 0;
3001 if (r_type == R_390_TLS_GD64)
3002 dr_type = R_390_TLS_DTPMOD;
3004 dr_type = R_390_TLS_TPOFF;
3005 if (dr_type == R_390_TLS_TPOFF && indx == 0)
3006 outrel.r_addend = relocation - dtpoff_base (info);
3008 outrel.r_addend = 0;
3009 outrel.r_info = ELF64_R_INFO (indx, dr_type);
3010 loc = htab->elf.srelgot->contents;
3011 loc += htab->elf.srelgot->reloc_count++
3012 * sizeof (Elf64_External_Rela);
3013 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3015 if (r_type == R_390_TLS_GD64)
3019 BFD_ASSERT (! unresolved_reloc);
3020 bfd_put_64 (output_bfd,
3021 relocation - dtpoff_base (info),
3022 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3026 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3027 outrel.r_offset += GOT_ENTRY_SIZE;
3028 outrel.r_addend = 0;
3029 htab->elf.srelgot->reloc_count++;
3030 loc += sizeof (Elf64_External_Rela);
3031 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3038 local_got_offsets[r_symndx] |= 1;
3041 if (off >= (bfd_vma) -2)
3043 if (r_type == ELF64_R_TYPE (rel->r_info))
3045 relocation = htab->elf.sgot->output_offset + off;
3046 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3047 relocation += htab->elf.sgot->output_section->vma;
3048 unresolved_reloc = FALSE;
3052 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3053 contents + rel->r_offset);
3058 case R_390_TLS_GOTIE12:
3059 case R_390_TLS_GOTIE20:
3060 case R_390_TLS_IEENT:
3063 if (local_got_offsets == NULL)
3065 off = local_got_offsets[r_symndx];
3066 if (bfd_link_pic (info))
3067 goto emit_tls_relocs;
3071 off = h->got.offset;
3072 tls_type = elf_s390_hash_entry(h)->tls_type;
3073 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3074 goto emit_tls_relocs;
3077 if (htab->elf.sgot == NULL)
3080 BFD_ASSERT (! unresolved_reloc);
3081 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3082 htab->elf.sgot->contents + off);
3083 relocation = htab->elf.sgot->output_offset + off;
3084 if (r_type == R_390_TLS_IEENT)
3085 relocation += htab->elf.sgot->output_section->vma;
3086 unresolved_reloc = FALSE;
3089 case R_390_TLS_LDM64:
3090 if (! bfd_link_pic (info))
3091 /* The literal pool entry this relocation refers to gets ignored
3092 by the optimized code of the local exec model. Do nothing
3093 and the value will turn out zero. */
3096 if (htab->elf.sgot == NULL)
3099 off = htab->tls_ldm_got.offset;
3104 Elf_Internal_Rela outrel;
3107 if (htab->elf.srelgot == NULL)
3110 outrel.r_offset = (htab->elf.sgot->output_section->vma
3111 + htab->elf.sgot->output_offset + off);
3113 bfd_put_64 (output_bfd, 0,
3114 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3115 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3116 outrel.r_addend = 0;
3117 loc = htab->elf.srelgot->contents;
3118 loc += htab->elf.srelgot->reloc_count++
3119 * sizeof (Elf64_External_Rela);
3120 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3121 htab->tls_ldm_got.offset |= 1;
3123 relocation = htab->elf.sgot->output_offset + off;
3124 unresolved_reloc = FALSE;
3127 case R_390_TLS_LE64:
3128 if (bfd_link_dll (info))
3130 /* Linking a shared library with non-fpic code requires
3131 a R_390_TLS_TPOFF relocation. */
3132 Elf_Internal_Rela outrel;
3137 outrel.r_offset = rel->r_offset
3138 + input_section->output_section->vma
3139 + input_section->output_offset;
3140 if (h != NULL && h->dynindx != -1)
3144 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3146 outrel.r_addend = relocation - dtpoff_base (info);
3148 outrel.r_addend = 0;
3149 sreloc = elf_section_data (input_section)->sreloc;
3152 loc = sreloc->contents;
3153 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3154 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3158 BFD_ASSERT (! unresolved_reloc);
3159 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3160 contents + rel->r_offset);
3164 case R_390_TLS_LDO64:
3165 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3166 relocation -= dtpoff_base (info);
3168 /* When converting LDO to LE, we must negate. */
3169 relocation = -tpoff (info, relocation);
3172 /* Relocations for tls instructions. */
3173 case R_390_TLS_LOAD:
3174 case R_390_TLS_GDCALL:
3175 case R_390_TLS_LDCALL:
3176 tls_type = GOT_UNKNOWN;
3177 if (h == NULL && local_got_offsets)
3178 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3180 tls_type = elf_s390_hash_entry(h)->tls_type;
3182 if (tls_type == GOT_TLS_GD)
3185 if (r_type == R_390_TLS_LOAD)
3187 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3189 /* IE->LE transition. Four valid cases:
3190 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3191 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3192 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3193 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3194 unsigned int insn0, insn1, ry;
3196 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3197 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3198 if (insn1 != 0x0004)
3199 invalid_tls_insn (input_bfd, input_section, rel);
3201 if ((insn0 & 0xff00f000) == 0xe3000000)
3202 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3203 ry = (insn0 & 0x000f0000);
3204 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3205 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3206 ry = (insn0 & 0x0000f000) << 4;
3207 else if ((insn0 & 0xff00f000) == 0xe300c000)
3208 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3209 ry = (insn0 & 0x000f0000);
3210 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3211 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3212 ry = (insn0 & 0x0000f000) << 4;
3214 invalid_tls_insn (input_bfd, input_section, rel);
3215 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3217 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3218 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3221 else if (r_type == R_390_TLS_GDCALL)
3223 unsigned int insn0, insn1;
3225 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3226 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3227 if ((insn0 & 0xffff0000) != 0xc0e50000)
3228 invalid_tls_insn (input_bfd, input_section, rel);
3229 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3231 /* GD->LE transition.
3232 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3238 /* GD->IE transition.
3239 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3243 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3244 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3246 else if (r_type == R_390_TLS_LDCALL)
3248 if (!bfd_link_pic (info))
3250 unsigned int insn0, insn1;
3252 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3253 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3254 if ((insn0 & 0xffff0000) != 0xc0e50000)
3255 invalid_tls_insn (input_bfd, input_section, rel);
3256 /* LD->LE transition.
3257 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3260 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3261 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3270 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3271 because such sections are not SEC_ALLOC and thus ld.so will
3272 not process them. */
3273 if (unresolved_reloc
3274 && !((input_section->flags & SEC_DEBUGGING) != 0
3276 && _bfd_elf_section_offset (output_bfd, info, input_section,
3277 rel->r_offset) != (bfd_vma) -1)
3279 /* xgettext:c-format */
3280 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3283 (long) rel->r_offset,
3285 h->root.root.string);
3289 /* When applying a 24 bit reloc we need to start one byte
3290 earlier. Otherwise the 32 bit get/put bfd operations might
3291 access a byte after the actual section. */
3292 if (r_type == R_390_PC24DBL
3293 || r_type == R_390_PLT24DBL)
3296 if (r_type == R_390_20
3297 || r_type == R_390_GOT20
3298 || r_type == R_390_GOTPLT20
3299 || r_type == R_390_TLS_GOTIE20)
3301 relocation += rel->r_addend;
3302 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3303 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3304 contents, rel->r_offset,
3308 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3309 contents, rel->r_offset,
3310 relocation, rel->r_addend);
3312 if (r != bfd_reloc_ok)
3317 name = h->root.root.string;
3320 name = bfd_elf_string_from_elf_section (input_bfd,
3321 symtab_hdr->sh_link,
3326 name = bfd_section_name (input_bfd, sec);
3329 if (r == bfd_reloc_overflow)
3330 (*info->callbacks->reloc_overflow)
3331 (info, (h ? &h->root : NULL), name, howto->name,
3332 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3336 /* xgettext:c-format */
3337 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3338 input_bfd, input_section,
3339 (long) rel->r_offset, name, (int) r);
3348 /* Generate the PLT slots together with the dynamic relocations needed
3349 for IFUNC symbols. */
3352 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3353 struct bfd_link_info *info,
3354 struct elf_link_hash_entry *h,
3355 struct elf_s390_link_hash_table *htab,
3357 bfd_vma resolver_address)
3361 Elf_Internal_Rela rela;
3363 asection *plt, *gotplt, *relplt;
3365 if (htab->elf.iplt == NULL
3366 || htab->elf.igotplt == NULL
3367 || htab->elf.irelplt == NULL)
3370 /* Index of the PLT slot within iplt section. */
3371 plt_index = plt_offset / PLT_ENTRY_SIZE;
3372 plt = htab->elf.iplt;
3373 /* Offset into the igot.plt section. */
3374 got_offset = plt_index * GOT_ENTRY_SIZE;
3375 gotplt = htab->elf.igotplt;
3376 relplt = htab->elf.irelplt;
3378 /* Fill in the blueprint of a PLT. */
3379 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3382 /* Fixup the relative address to the GOT entry */
3383 bfd_put_32 (output_bfd,
3384 (gotplt->output_section->vma +
3385 gotplt->output_offset + got_offset
3386 - (plt->output_section->vma +
3387 plt->output_offset +
3389 plt->contents + plt_offset + 2);
3390 /* Fixup the relative branch to PLT 0 */
3391 bfd_put_32 (output_bfd, - (plt->output_offset +
3392 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3393 plt->contents + plt_offset + 24);
3394 /* Fixup offset into .rela.plt section. */
3395 bfd_put_32 (output_bfd, relplt->output_offset +
3396 plt_index * sizeof (Elf64_External_Rela),
3397 plt->contents + plt_offset + 28);
3399 /* Fill in the entry in the global offset table.
3400 Points to instruction after GOT offset. */
3401 bfd_put_64 (output_bfd,
3402 (plt->output_section->vma
3403 + plt->output_offset
3406 gotplt->contents + got_offset);
3408 /* Fill in the entry in the .rela.plt section. */
3409 rela.r_offset = (gotplt->output_section->vma
3410 + gotplt->output_offset
3415 || ((bfd_link_executable (info)
3416 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3419 /* The symbol can be locally resolved. */
3420 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3421 rela.r_addend = resolver_address;
3425 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3429 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3430 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3434 /* Finish up dynamic symbol handling. We set the contents of various
3435 dynamic sections here. */
3438 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3439 struct bfd_link_info *info,
3440 struct elf_link_hash_entry *h,
3441 Elf_Internal_Sym *sym)
3443 struct elf_s390_link_hash_table *htab;
3444 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3446 htab = elf_s390_hash_table (info);
3450 if (h->plt.offset != (bfd_vma) -1)
3454 Elf_Internal_Rela rela;
3457 /* This symbol has an entry in the procedure linkage table. Set
3459 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3461 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3462 htab, h->plt.offset,
3463 eh->ifunc_resolver_address +
3464 eh->ifunc_resolver_section->output_offset +
3465 eh->ifunc_resolver_section->output_section->vma);
3467 /* Do not return yet. Handling of explicit GOT slots of
3468 IFUNC symbols is below. */
3472 if (h->dynindx == -1
3473 || htab->elf.splt == NULL
3474 || htab->elf.sgotplt == NULL
3475 || htab->elf.srelplt == NULL)
3479 Current offset - size first entry / entry size. */
3480 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3482 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3484 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3486 /* Fill in the blueprint of a PLT. */
3487 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3490 /* Fixup the relative address to the GOT entry */
3491 bfd_put_32 (output_bfd,
3492 (htab->elf.sgotplt->output_section->vma +
3493 htab->elf.sgotplt->output_offset + got_offset
3494 - (htab->elf.splt->output_section->vma +
3495 htab->elf.splt->output_offset +
3497 htab->elf.splt->contents + h->plt.offset + 2);
3498 /* Fixup the relative branch to PLT 0 */
3499 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3500 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3501 htab->elf.splt->contents + h->plt.offset + 24);
3502 /* Fixup offset into .rela.plt section. */
3503 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3504 htab->elf.splt->contents + h->plt.offset + 28);
3506 /* Fill in the entry in the global offset table.
3507 Points to instruction after GOT offset. */
3508 bfd_put_64 (output_bfd,
3509 (htab->elf.splt->output_section->vma
3510 + htab->elf.splt->output_offset
3513 htab->elf.sgotplt->contents + got_offset);
3515 /* Fill in the entry in the .rela.plt section. */
3516 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3517 + htab->elf.sgotplt->output_offset
3519 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3521 loc = htab->elf.srelplt->contents + plt_index *
3522 sizeof (Elf64_External_Rela);
3523 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3525 if (!h->def_regular)
3527 /* Mark the symbol as undefined, rather than as defined in
3528 the .plt section. Leave the value alone. This is a clue
3529 for the dynamic linker, to make function pointer
3530 comparisons work between an application and shared
3532 sym->st_shndx = SHN_UNDEF;
3537 if (h->got.offset != (bfd_vma) -1
3538 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3539 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3540 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3542 Elf_Internal_Rela rela;
3545 /* This symbol has an entry in the global offset table. Set it
3547 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3550 rela.r_offset = (htab->elf.sgot->output_section->vma
3551 + htab->elf.sgot->output_offset
3552 + (h->got.offset &~ (bfd_vma) 1));
3554 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3556 if (bfd_link_pic (info))
3558 /* An explicit GOT slot usage needs GLOB_DAT. If the
3559 symbol references local the implicit got.iplt slot
3560 will be used and the IRELATIVE reloc has been created
3566 /* For non-shared objects explicit GOT slots must be
3567 filled with the PLT slot address for pointer
3568 equality reasons. */
3569 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3570 + htab->elf.iplt->output_offset
3572 htab->elf.sgot->contents + h->got.offset);
3576 else if (bfd_link_pic (info)
3577 && SYMBOL_REFERENCES_LOCAL (info, h))
3579 /* If this is a static link, or it is a -Bsymbolic link and
3580 the symbol is defined locally or was forced to be local
3581 because of a version file, we just want to emit a
3582 RELATIVE reloc. The entry in the global offset table
3583 will already have been initialized in the
3584 relocate_section function. */
3585 if (!h->def_regular)
3587 BFD_ASSERT((h->got.offset & 1) != 0);
3588 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3589 rela.r_addend = (h->root.u.def.value
3590 + h->root.u.def.section->output_section->vma
3591 + h->root.u.def.section->output_offset);
3595 BFD_ASSERT((h->got.offset & 1) == 0);
3597 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3598 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3602 loc = htab->elf.srelgot->contents;
3603 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3604 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3609 Elf_Internal_Rela rela;
3613 /* This symbols needs a copy reloc. Set it up. */
3615 if (h->dynindx == -1
3616 || (h->root.type != bfd_link_hash_defined
3617 && h->root.type != bfd_link_hash_defweak)
3618 || htab->elf.srelbss == NULL)
3621 rela.r_offset = (h->root.u.def.value
3622 + h->root.u.def.section->output_section->vma
3623 + h->root.u.def.section->output_offset);
3624 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3626 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3627 s = htab->elf.sreldynrelro;
3629 s = htab->elf.srelbss;
3630 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3631 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3634 /* Mark some specially defined symbols as absolute. */
3635 if (h == htab->elf.hdynamic
3636 || h == htab->elf.hgot
3637 || h == htab->elf.hplt)
3638 sym->st_shndx = SHN_ABS;
3643 /* Used to decide how to sort relocs in an optimal manner for the
3644 dynamic linker, before writing them out. */
3646 static enum elf_reloc_type_class
3647 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3648 const asection *rel_sec ATTRIBUTE_UNUSED,
3649 const Elf_Internal_Rela *rela)
3651 bfd *abfd = info->output_bfd;
3652 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3653 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3654 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3655 Elf_Internal_Sym sym;
3657 if (htab->elf.dynsym == NULL
3658 || !bed->s->swap_symbol_in (abfd,
3659 (htab->elf.dynsym->contents
3660 + r_symndx * bed->s->sizeof_sym),
3664 /* Check relocation against STT_GNU_IFUNC symbol. */
3665 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3666 return reloc_class_ifunc;
3668 switch ((int) ELF64_R_TYPE (rela->r_info))
3670 case R_390_RELATIVE:
3671 return reloc_class_relative;
3672 case R_390_JMP_SLOT:
3673 return reloc_class_plt;
3675 return reloc_class_copy;
3677 return reloc_class_normal;
3681 /* Finish up the dynamic sections. */
3684 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3685 struct bfd_link_info *info)
3687 struct elf_s390_link_hash_table *htab;
3693 htab = elf_s390_hash_table (info);
3697 dynobj = htab->elf.dynobj;
3698 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3700 if (htab->elf.dynamic_sections_created)
3702 Elf64_External_Dyn *dyncon, *dynconend;
3704 if (sdyn == NULL || htab->elf.sgot == NULL)
3707 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3708 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3709 for (; dyncon < dynconend; dyncon++)
3711 Elf_Internal_Dyn dyn;
3714 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3722 s = htab->elf.sgotplt;
3723 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3727 s = htab->elf.srelplt;
3728 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3732 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3736 /* The procedure linkage table relocs (DT_JMPREL) should
3737 not be included in the overall relocs (DT_RELA).
3738 Therefore, we override the DT_RELASZ entry here to
3739 make it not include the JMPREL relocs. Since the
3740 linker script arranges for .rela.plt to follow all
3741 other relocation sections, we don't have to worry
3742 about changing the DT_RELA entry. */
3743 dyn.d_un.d_val -= htab->elf.srelplt->size + htab->elf.irelplt->size;
3747 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3750 /* Fill in the special first entry in the procedure linkage table. */
3751 if (htab->elf.splt && htab->elf.splt->size > 0)
3753 /* fill in blueprint for plt 0 entry */
3754 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3755 PLT_FIRST_ENTRY_SIZE);
3756 /* Fixup relative address to start of GOT */
3757 bfd_put_32 (output_bfd,
3758 (htab->elf.sgotplt->output_section->vma
3759 + htab->elf.sgotplt->output_offset
3760 - htab->elf.splt->output_section->vma
3761 - htab->elf.splt->output_offset - 6)/2,
3762 htab->elf.splt->contents + 8);
3764 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3765 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3769 if (htab->elf.sgotplt)
3771 /* Fill in the first three entries in the global offset table. */
3772 if (htab->elf.sgotplt->size > 0)
3774 bfd_put_64 (output_bfd,
3775 (sdyn == NULL ? (bfd_vma) 0
3776 : sdyn->output_section->vma + sdyn->output_offset),
3777 htab->elf.sgotplt->contents);
3778 /* One entry for shared object struct ptr. */
3779 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3780 /* One entry for _dl_runtime_resolve. */
3781 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3784 elf_section_data (htab->elf.sgot->output_section)
3785 ->this_hdr.sh_entsize = 8;
3788 /* Finish dynamic symbol for local IFUNC symbols. */
3789 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3791 struct plt_entry *local_plt;
3792 Elf_Internal_Sym *isym;
3793 Elf_Internal_Shdr *symtab_hdr;
3795 symtab_hdr = &elf_symtab_hdr (ibfd);
3797 local_plt = elf_s390_local_plt (ibfd);
3798 if (local_plt != NULL)
3799 for (i = 0; i < symtab_hdr->sh_info; i++)
3801 if (local_plt[i].plt.offset != (bfd_vma) -1)
3803 asection *sec = local_plt[i].sec;
3804 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3808 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3809 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3810 local_plt[i].plt.offset,
3812 + sec->output_section->vma
3813 + sec->output_offset);
3822 /* Support for core dump NOTE sections. */
3825 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3830 switch (note->descsz)
3835 case 336: /* sizeof(struct elf_prstatus) on s390x */
3837 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3840 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3848 /* Make a ".reg/999" section. */
3849 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3850 size, note->descpos + offset);
3854 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3856 switch (note->descsz)
3861 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3862 elf_tdata (abfd)->core->pid
3863 = bfd_get_32 (abfd, note->descdata + 24);
3864 elf_tdata (abfd)->core->program
3865 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3866 elf_tdata (abfd)->core->command
3867 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3870 /* Note that for some reason, a spurious space is tacked
3871 onto the end of the args in some (at least one anyway)
3872 implementations, so strip it off if it exists. */
3875 char *command = elf_tdata (abfd)->core->command;
3876 int n = strlen (command);
3878 if (0 < n && command[n - 1] == ' ')
3879 command[n - 1] = '\0';
3886 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3898 char data[136] = { 0 };
3899 const char *fname, *psargs;
3901 va_start (ap, note_type);
3902 fname = va_arg (ap, const char *);
3903 psargs = va_arg (ap, const char *);
3906 strncpy (data + 40, fname, 16);
3907 strncpy (data + 56, psargs, 80);
3908 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3909 &data, sizeof (data));
3914 char data[336] = { 0 };
3919 va_start (ap, note_type);
3920 pid = va_arg (ap, long);
3921 cursig = va_arg (ap, int);
3922 gregs = va_arg (ap, const void *);
3925 bfd_put_16 (abfd, cursig, data + 12);
3926 bfd_put_32 (abfd, pid, data + 32);
3927 memcpy (data + 112, gregs, 216);
3928 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3929 &data, sizeof (data));
3935 /* Return address for Ith PLT stub in section PLT, for relocation REL
3936 or (bfd_vma) -1 if it should not be included. */
3939 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3940 const arelent *rel ATTRIBUTE_UNUSED)
3942 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3945 /* Merge backend specific data from an object file to the output
3946 object file when linking. */
3949 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3951 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3954 return elf_s390_merge_obj_attributes (ibfd, info);
3957 /* Why was the hash table entry size definition changed from
3958 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3959 this is the only reason for the s390_elf64_size_info structure. */
3961 const struct elf_size_info s390_elf64_size_info =
3963 sizeof (Elf64_External_Ehdr),
3964 sizeof (Elf64_External_Phdr),
3965 sizeof (Elf64_External_Shdr),
3966 sizeof (Elf64_External_Rel),
3967 sizeof (Elf64_External_Rela),
3968 sizeof (Elf64_External_Sym),
3969 sizeof (Elf64_External_Dyn),
3970 sizeof (Elf_External_Note),
3971 8, /* hash-table entry size. */
3972 1, /* internal relocations per external relocations. */
3973 64, /* arch_size. */
3974 3, /* log_file_align. */
3975 ELFCLASS64, EV_CURRENT,
3976 bfd_elf64_write_out_phdrs,
3977 bfd_elf64_write_shdrs_and_ehdr,
3978 bfd_elf64_checksum_contents,
3979 bfd_elf64_write_relocs,
3980 bfd_elf64_swap_symbol_in,
3981 bfd_elf64_swap_symbol_out,
3982 bfd_elf64_slurp_reloc_table,
3983 bfd_elf64_slurp_symbol_table,
3984 bfd_elf64_swap_dyn_in,
3985 bfd_elf64_swap_dyn_out,
3986 bfd_elf64_swap_reloc_in,
3987 bfd_elf64_swap_reloc_out,
3988 bfd_elf64_swap_reloca_in,
3989 bfd_elf64_swap_reloca_out
3992 #define TARGET_BIG_SYM s390_elf64_vec
3993 #define TARGET_BIG_NAME "elf64-s390"
3994 #define ELF_ARCH bfd_arch_s390
3995 #define ELF_TARGET_ID S390_ELF_DATA
3996 #define ELF_MACHINE_CODE EM_S390
3997 #define ELF_MACHINE_ALT1 EM_S390_OLD
3998 #define ELF_MAXPAGESIZE 0x1000
4000 #define elf_backend_size_info s390_elf64_size_info
4002 #define elf_backend_can_gc_sections 1
4003 #define elf_backend_can_refcount 1
4004 #define elf_backend_want_got_plt 1
4005 #define elf_backend_plt_readonly 1
4006 #define elf_backend_want_plt_sym 0
4007 #define elf_backend_got_header_size 24
4008 #define elf_backend_want_dynrelro 1
4009 #define elf_backend_rela_normal 1
4011 #define elf_info_to_howto elf_s390_info_to_howto
4013 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
4014 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4015 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4016 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4017 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4019 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4020 #define elf_backend_check_relocs elf_s390_check_relocs
4021 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4022 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4023 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4024 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4025 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4026 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4027 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4028 #define elf_backend_relocate_section elf_s390_relocate_section
4029 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4030 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4031 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4032 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4033 #define elf_backend_write_core_note elf_s390_write_core_note
4034 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4035 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4036 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4038 #define bfd_elf64_mkobject elf_s390_mkobject
4039 #define elf_backend_object_p elf_s390_object_p
4041 #include "elf64-target.h"