1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2016 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 dir->ref_dynamic |= ind->ref_dynamic;
789 dir->ref_regular |= ind->ref_regular;
790 dir->ref_regular_nonweak |= ind->ref_regular_nonweak;
791 dir->needs_plt |= ind->needs_plt;
794 _bfd_elf_link_hash_copy_indirect (info, dir, ind);
798 elf_s390_tls_transition (struct bfd_link_info *info,
802 if (bfd_link_pic (info))
810 return R_390_TLS_LE64;
811 return R_390_TLS_IE64;
812 case R_390_TLS_GOTIE64:
814 return R_390_TLS_LE64;
815 return R_390_TLS_GOTIE64;
816 case R_390_TLS_LDM64:
817 return R_390_TLS_LE64;
823 /* Look through the relocs for a section during the first phase, and
824 allocate space in the global offset table or procedure linkage
828 elf_s390_check_relocs (bfd *abfd,
829 struct bfd_link_info *info,
831 const Elf_Internal_Rela *relocs)
833 struct elf_s390_link_hash_table *htab;
834 Elf_Internal_Shdr *symtab_hdr;
835 struct elf_link_hash_entry **sym_hashes;
836 const Elf_Internal_Rela *rel;
837 const Elf_Internal_Rela *rel_end;
839 bfd_signed_vma *local_got_refcounts;
840 int tls_type, old_tls_type;
842 if (bfd_link_relocatable (info))
845 BFD_ASSERT (is_s390_elf (abfd));
847 htab = elf_s390_hash_table (info);
851 symtab_hdr = &elf_symtab_hdr (abfd);
852 sym_hashes = elf_sym_hashes (abfd);
853 local_got_refcounts = elf_local_got_refcounts (abfd);
857 rel_end = relocs + sec->reloc_count;
858 for (rel = relocs; rel < rel_end; rel++)
861 unsigned long r_symndx;
862 struct elf_link_hash_entry *h;
863 Elf_Internal_Sym *isym;
865 r_symndx = ELF64_R_SYM (rel->r_info);
867 if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr))
869 /* xgettext:c-format */
870 _bfd_error_handler (_("%B: bad symbol index: %d"),
875 if (r_symndx < symtab_hdr->sh_info)
877 /* A local symbol. */
878 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
883 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
885 struct plt_entry *plt;
887 if (htab->elf.dynobj == NULL)
888 htab->elf.dynobj = abfd;
890 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
893 if (local_got_refcounts == NULL)
895 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
897 local_got_refcounts = elf_local_got_refcounts (abfd);
899 plt = elf_s390_local_plt (abfd);
900 plt[r_symndx].plt.refcount++;
906 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
907 while (h->root.type == bfd_link_hash_indirect
908 || h->root.type == bfd_link_hash_warning)
909 h = (struct elf_link_hash_entry *) h->root.u.i.link;
911 /* PR15323, ref flags aren't set for references in the same
913 h->root.non_ir_ref = 1;
916 /* Create got section and local_got_refcounts array if they
918 r_type = elf_s390_tls_transition (info,
919 ELF64_R_TYPE (rel->r_info),
934 case R_390_GOTPLTENT:
936 case R_390_TLS_GOTIE12:
937 case R_390_TLS_GOTIE20:
938 case R_390_TLS_GOTIE64:
939 case R_390_TLS_IEENT:
941 case R_390_TLS_LDM64:
943 && local_got_refcounts == NULL)
945 if (!elf_s390_allocate_local_syminfo (abfd, symtab_hdr))
947 local_got_refcounts = elf_local_got_refcounts (abfd);
956 if (htab->elf.sgot == NULL)
958 if (htab->elf.dynobj == NULL)
959 htab->elf.dynobj = abfd;
960 if (!_bfd_elf_create_got_section (htab->elf.dynobj, info))
967 if (htab->elf.dynobj == NULL)
968 htab->elf.dynobj = abfd;
969 if (!s390_elf_create_ifunc_sections (htab->elf.dynobj, info))
972 /* Make sure an IFUNC symbol defined in a non-shared object
973 always gets a PLT slot. */
974 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
976 /* The symbol is called by the dynamic loader in order
977 to resolve the relocation. So it is in fact also
988 /* These relocs do not need a GOT slot. They just load the
989 GOT pointer itself or address something else relative to
990 the GOT. Since the GOT pointer has been set up above we
996 if (h == NULL || !s390_is_ifunc_symbol_p (h) || !h->def_regular)
1000 case R_390_PLT12DBL:
1001 case R_390_PLT16DBL:
1002 case R_390_PLT24DBL:
1004 case R_390_PLT32DBL:
1006 case R_390_PLTOFF16:
1007 case R_390_PLTOFF32:
1008 case R_390_PLTOFF64:
1009 /* This symbol requires a procedure linkage table entry. We
1010 actually build the entry in adjust_dynamic_symbol,
1011 because this might be a case of linking PIC code which is
1012 never referenced by a dynamic object, in which case we
1013 don't need to generate a procedure linkage table entry
1016 /* If this is a local symbol, we resolve it directly without
1017 creating a procedure linkage table entry. */
1021 h->plt.refcount += 1;
1025 case R_390_GOTPLT12:
1026 case R_390_GOTPLT16:
1027 case R_390_GOTPLT20:
1028 case R_390_GOTPLT32:
1029 case R_390_GOTPLT64:
1030 case R_390_GOTPLTENT:
1031 /* This symbol requires either a procedure linkage table entry
1032 or an entry in the local got. We actually build the entry
1033 in adjust_dynamic_symbol because whether this is really a
1034 global reference can change and with it the fact if we have
1035 to create a plt entry or a local got entry. To be able to
1036 make a once global symbol a local one we have to keep track
1037 of the number of gotplt references that exist for this
1041 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount++;
1043 h->plt.refcount += 1;
1046 local_got_refcounts[r_symndx] += 1;
1049 case R_390_TLS_LDM64:
1050 htab->tls_ldm_got.refcount += 1;
1053 case R_390_TLS_IE64:
1054 case R_390_TLS_GOTIE12:
1055 case R_390_TLS_GOTIE20:
1056 case R_390_TLS_GOTIE64:
1057 case R_390_TLS_IEENT:
1058 if (bfd_link_pic (info))
1059 info->flags |= DF_STATIC_TLS;
1068 case R_390_TLS_GD64:
1069 /* This symbol requires a global offset table entry. */
1078 tls_type = GOT_NORMAL;
1080 case R_390_TLS_GD64:
1081 tls_type = GOT_TLS_GD;
1083 case R_390_TLS_IE64:
1084 case R_390_TLS_GOTIE64:
1085 tls_type = GOT_TLS_IE;
1087 case R_390_TLS_GOTIE12:
1088 case R_390_TLS_GOTIE20:
1089 case R_390_TLS_IEENT:
1090 tls_type = GOT_TLS_IE_NLT;
1096 h->got.refcount += 1;
1097 old_tls_type = elf_s390_hash_entry(h)->tls_type;
1101 local_got_refcounts[r_symndx] += 1;
1102 old_tls_type = elf_s390_local_got_tls_type (abfd) [r_symndx];
1104 /* If a TLS symbol is accessed using IE at least once,
1105 there is no point to use dynamic model for it. */
1106 if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN)
1108 if (old_tls_type == GOT_NORMAL || tls_type == GOT_NORMAL)
1111 /* xgettext:c-format */
1112 (_("%B: `%s' accessed both as normal and thread local symbol"),
1113 abfd, h->root.root.string);
1116 if (old_tls_type > tls_type)
1117 tls_type = old_tls_type;
1120 if (old_tls_type != tls_type)
1123 elf_s390_hash_entry (h)->tls_type = tls_type;
1125 elf_s390_local_got_tls_type (abfd) [r_symndx] = tls_type;
1128 if (r_type != R_390_TLS_IE64)
1132 case R_390_TLS_LE64:
1133 /* For static linking and executables this reloc will be
1134 calculated at linktime otherwise a TLS_TPOFF runtime
1135 reloc will be generated. */
1136 if (r_type == R_390_TLS_LE64 && bfd_link_pie (info))
1139 if (!bfd_link_pic (info))
1141 info->flags |= DF_STATIC_TLS;
1155 if (h != NULL && bfd_link_executable (info))
1157 /* If this reloc is in a read-only section, we might
1158 need a copy reloc. We can't check reliably at this
1159 stage whether the section is read-only, as input
1160 sections have not yet been mapped to output sections.
1161 Tentatively set the flag for now, and correct in
1162 adjust_dynamic_symbol. */
1165 if (!bfd_link_pic (info))
1167 /* We may need a .plt entry if the function this reloc
1168 refers to is in a shared lib. */
1169 h->plt.refcount += 1;
1173 /* If we are creating a shared library, and this is a reloc
1174 against a global symbol, or a non PC relative reloc
1175 against a local symbol, then we need to copy the reloc
1176 into the shared library. However, if we are linking with
1177 -Bsymbolic, we do not need to copy a reloc against a
1178 global symbol which is defined in an object we are
1179 including in the link (i.e., DEF_REGULAR is set). At
1180 this point we have not seen all the input files, so it is
1181 possible that DEF_REGULAR is not set now but will be set
1182 later (it is never cleared). In case of a weak definition,
1183 DEF_REGULAR may be cleared later by a strong definition in
1184 a shared library. We account for that possibility below by
1185 storing information in the relocs_copied field of the hash
1186 table entry. A similar situation occurs when creating
1187 shared libraries and symbol visibility changes render the
1190 If on the other hand, we are creating an executable, we
1191 may need to keep relocations for symbols satisfied by a
1192 dynamic library if we manage to avoid copy relocs for the
1194 if ((bfd_link_pic (info)
1195 && (sec->flags & SEC_ALLOC) != 0
1196 && ((ELF64_R_TYPE (rel->r_info) != R_390_PC16
1197 && ELF64_R_TYPE (rel->r_info) != R_390_PC12DBL
1198 && ELF64_R_TYPE (rel->r_info) != R_390_PC16DBL
1199 && ELF64_R_TYPE (rel->r_info) != R_390_PC24DBL
1200 && ELF64_R_TYPE (rel->r_info) != R_390_PC32
1201 && ELF64_R_TYPE (rel->r_info) != R_390_PC32DBL
1202 && ELF64_R_TYPE (rel->r_info) != R_390_PC64)
1204 && (! SYMBOLIC_BIND (info, h)
1205 || h->root.type == bfd_link_hash_defweak
1206 || !h->def_regular))))
1207 || (ELIMINATE_COPY_RELOCS
1208 && !bfd_link_pic (info)
1209 && (sec->flags & SEC_ALLOC) != 0
1211 && (h->root.type == bfd_link_hash_defweak
1212 || !h->def_regular)))
1214 struct elf_dyn_relocs *p;
1215 struct elf_dyn_relocs **head;
1217 /* We must copy these reloc types into the output file.
1218 Create a reloc section in dynobj and make room for
1222 if (htab->elf.dynobj == NULL)
1223 htab->elf.dynobj = abfd;
1225 sreloc = _bfd_elf_make_dynamic_reloc_section
1226 (sec, htab->elf.dynobj, 3, abfd, /*rela?*/ TRUE);
1232 /* If this is a global symbol, we count the number of
1233 relocations we need for this symbol. */
1236 head = &((struct elf_s390_link_hash_entry *) h)->dyn_relocs;
1240 /* Track dynamic relocs needed for local syms too.
1241 We really need local syms available to do this
1246 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1251 s = bfd_section_from_elf_index (abfd, isym->st_shndx);
1255 vpp = &elf_section_data (s)->local_dynrel;
1256 head = (struct elf_dyn_relocs **) vpp;
1260 if (p == NULL || p->sec != sec)
1262 bfd_size_type amt = sizeof *p;
1263 p = ((struct elf_dyn_relocs *)
1264 bfd_alloc (htab->elf.dynobj, amt));
1275 if (ELF64_R_TYPE (rel->r_info) == R_390_PC16
1276 || ELF64_R_TYPE (rel->r_info) == R_390_PC12DBL
1277 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1278 || ELF64_R_TYPE (rel->r_info) == R_390_PC16DBL
1279 || ELF64_R_TYPE (rel->r_info) == R_390_PC32
1280 || ELF64_R_TYPE (rel->r_info) == R_390_PC32DBL
1281 || ELF64_R_TYPE (rel->r_info) == R_390_PC64)
1286 /* This relocation describes the C++ object vtable hierarchy.
1287 Reconstruct it for later use during GC. */
1288 case R_390_GNU_VTINHERIT:
1289 if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset))
1293 /* This relocation describes which C++ vtable entries are actually
1294 used. Record for later use during GC. */
1295 case R_390_GNU_VTENTRY:
1296 BFD_ASSERT (h != NULL);
1298 && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend))
1310 /* Return the section that should be marked against GC for a given
1314 elf_s390_gc_mark_hook (asection *sec,
1315 struct bfd_link_info *info,
1316 Elf_Internal_Rela *rel,
1317 struct elf_link_hash_entry *h,
1318 Elf_Internal_Sym *sym)
1321 switch (ELF64_R_TYPE (rel->r_info))
1323 case R_390_GNU_VTINHERIT:
1324 case R_390_GNU_VTENTRY:
1328 return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym);
1331 /* Update the got entry reference counts for the section being removed. */
1334 elf_s390_gc_sweep_hook (bfd *abfd,
1335 struct bfd_link_info *info,
1337 const Elf_Internal_Rela *relocs)
1339 struct elf_s390_link_hash_table *htab;
1340 Elf_Internal_Shdr *symtab_hdr;
1341 struct elf_link_hash_entry **sym_hashes;
1342 bfd_signed_vma *local_got_refcounts;
1343 const Elf_Internal_Rela *rel, *relend;
1345 if (bfd_link_relocatable (info))
1348 htab = elf_s390_hash_table (info);
1352 elf_section_data (sec)->local_dynrel = NULL;
1354 symtab_hdr = &elf_symtab_hdr (abfd);
1355 sym_hashes = elf_sym_hashes (abfd);
1356 local_got_refcounts = elf_local_got_refcounts (abfd);
1358 relend = relocs + sec->reloc_count;
1359 for (rel = relocs; rel < relend; rel++)
1361 unsigned long r_symndx;
1362 unsigned int r_type;
1363 struct elf_link_hash_entry *h = NULL;
1365 r_symndx = ELF64_R_SYM (rel->r_info);
1366 if (r_symndx >= symtab_hdr->sh_info)
1368 struct elf_s390_link_hash_entry *eh;
1369 struct elf_dyn_relocs **pp;
1370 struct elf_dyn_relocs *p;
1372 h = sym_hashes[r_symndx - symtab_hdr->sh_info];
1373 while (h->root.type == bfd_link_hash_indirect
1374 || h->root.type == bfd_link_hash_warning)
1375 h = (struct elf_link_hash_entry *) h->root.u.i.link;
1376 eh = (struct elf_s390_link_hash_entry *) h;
1378 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next)
1381 /* Everything must go for SEC. */
1388 Elf_Internal_Sym *isym;
1390 /* A local symbol. */
1391 isym = bfd_sym_from_r_symndx (&htab->sym_cache,
1396 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
1398 struct plt_entry *plt = elf_s390_local_plt (abfd);
1399 if (plt[r_symndx].plt.refcount > 0)
1400 plt[r_symndx].plt.refcount--;
1404 r_type = ELF64_R_TYPE (rel->r_info);
1405 r_type = elf_s390_tls_transition (info, r_type, h != NULL);
1408 case R_390_TLS_LDM64:
1409 if (htab->tls_ldm_got.refcount > 0)
1410 htab->tls_ldm_got.refcount -= 1;
1412 case R_390_GOTOFF16:
1413 case R_390_GOTOFF32:
1414 case R_390_GOTOFF64:
1415 if (h != NULL && s390_is_ifunc_symbol_p (h) && h->def_regular)
1422 case R_390_GOTPCDBL:
1425 case R_390_TLS_GD64:
1426 case R_390_TLS_IE64:
1427 case R_390_TLS_GOTIE12:
1428 case R_390_TLS_GOTIE20:
1429 case R_390_TLS_GOTIE64:
1430 case R_390_TLS_IEENT:
1439 if (h->got.refcount > 0)
1440 h->got.refcount -= 1;
1442 else if (local_got_refcounts != NULL)
1444 if (local_got_refcounts[r_symndx] > 0)
1445 local_got_refcounts[r_symndx] -= 1;
1462 if (bfd_link_pic (info))
1466 case R_390_PLT12DBL:
1467 case R_390_PLT16DBL:
1468 case R_390_PLT24DBL:
1470 case R_390_PLT32DBL:
1472 case R_390_PLTOFF16:
1473 case R_390_PLTOFF32:
1474 case R_390_PLTOFF64:
1477 if (h->plt.refcount > 0)
1478 h->plt.refcount -= 1;
1482 case R_390_GOTPLT12:
1483 case R_390_GOTPLT16:
1484 case R_390_GOTPLT20:
1485 case R_390_GOTPLT32:
1486 case R_390_GOTPLT64:
1487 case R_390_GOTPLTENT:
1490 if (h->plt.refcount > 0)
1492 ((struct elf_s390_link_hash_entry *) h)->gotplt_refcount--;
1493 h->plt.refcount -= 1;
1496 else if (local_got_refcounts != NULL)
1498 if (local_got_refcounts[r_symndx] > 0)
1499 local_got_refcounts[r_symndx] -= 1;
1511 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1512 entry but we found we will not create any. Called when we find we will
1513 not have any PLT for this symbol, by for example
1514 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1515 or elf_s390_size_dynamic_sections if no dynamic sections will be
1516 created (we're only linking static objects). */
1519 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry *h)
1521 if (h->elf.root.type == bfd_link_hash_warning)
1522 h = (struct elf_s390_link_hash_entry *) h->elf.root.u.i.link;
1524 if (h->gotplt_refcount <= 0)
1527 /* We simply add the number of gotplt references to the number
1528 * of got references for this symbol. */
1529 h->elf.got.refcount += h->gotplt_refcount;
1530 h->gotplt_refcount = -1;
1533 /* Adjust a symbol defined by a dynamic object and referenced by a
1534 regular object. The current definition is in some section of the
1535 dynamic object, but we're not including those sections. We have to
1536 change the definition to something the rest of the link can
1540 elf_s390_adjust_dynamic_symbol (struct bfd_link_info *info,
1541 struct elf_link_hash_entry *h)
1543 struct elf_s390_link_hash_table *htab;
1546 /* STT_GNU_IFUNC symbol must go through PLT. */
1547 if (s390_is_ifunc_symbol_p (h))
1549 /* All local STT_GNU_IFUNC references must be treated as local
1550 calls via local PLT. */
1551 if (h->ref_regular && SYMBOL_CALLS_LOCAL (info, h))
1553 bfd_size_type pc_count = 0, count = 0;
1554 struct elf_dyn_relocs **pp;
1555 struct elf_s390_link_hash_entry *eh;
1556 struct elf_dyn_relocs *p;
1558 eh = (struct elf_s390_link_hash_entry *) h;
1559 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1561 pc_count += p->pc_count;
1562 p->count -= p->pc_count;
1571 if (pc_count || count)
1575 if (h->plt.refcount <= 0)
1576 h->plt.refcount = 1;
1578 h->plt.refcount += 1;
1582 if (h->plt.refcount <= 0)
1584 h->plt.offset = (bfd_vma) -1;
1590 /* If this is a function, put it in the procedure linkage table. We
1591 will fill in the contents of the procedure linkage table later
1592 (although we could actually do it here). */
1593 if (h->type == STT_FUNC
1596 if (h->plt.refcount <= 0
1597 || SYMBOL_CALLS_LOCAL (info, h)
1598 || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT
1599 && h->root.type == bfd_link_hash_undefweak))
1601 /* This case can occur if we saw a PLT32 reloc in an input
1602 file, but the symbol was never referred to by a dynamic
1603 object, or if all references were garbage collected. In
1604 such a case, we don't actually need to build a procedure
1605 linkage table, and we can just do a PC32 reloc instead. */
1606 h->plt.offset = (bfd_vma) -1;
1608 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1614 /* It's possible that we incorrectly decided a .plt reloc was
1615 needed for an R_390_PC32 reloc to a non-function sym in
1616 check_relocs. We can't decide accurately between function and
1617 non-function syms in check-relocs; Objects loaded later in
1618 the link may change h->type. So fix it now. */
1619 h->plt.offset = (bfd_vma) -1;
1621 /* If this is a weak symbol, and there is a real definition, the
1622 processor independent code will have arranged for us to see the
1623 real definition first, and we can just use the same value. */
1624 if (h->u.weakdef != NULL)
1626 BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined
1627 || h->u.weakdef->root.type == bfd_link_hash_defweak);
1628 h->root.u.def.section = h->u.weakdef->root.u.def.section;
1629 h->root.u.def.value = h->u.weakdef->root.u.def.value;
1630 if (ELIMINATE_COPY_RELOCS || info->nocopyreloc)
1631 h->non_got_ref = h->u.weakdef->non_got_ref;
1635 /* This is a reference to a symbol defined by a dynamic object which
1636 is not a function. */
1638 /* If we are creating a shared library, we must presume that the
1639 only references to the symbol are via the global offset table.
1640 For such cases we need not do anything here; the relocations will
1641 be handled correctly by relocate_section. */
1642 if (bfd_link_pic (info))
1645 /* If there are no references to this symbol that do not use the
1646 GOT, we don't need to generate a copy reloc. */
1647 if (!h->non_got_ref)
1650 /* If -z nocopyreloc was given, we won't generate them either. */
1651 if (info->nocopyreloc)
1657 if (ELIMINATE_COPY_RELOCS)
1659 struct elf_s390_link_hash_entry * eh;
1660 struct elf_dyn_relocs *p;
1662 eh = (struct elf_s390_link_hash_entry *) h;
1663 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1665 s = p->sec->output_section;
1666 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1670 /* If we didn't find any dynamic relocs in read-only sections, then
1671 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1679 /* We must allocate the symbol in our .dynbss section, which will
1680 become part of the .bss section of the executable. There will be
1681 an entry for this symbol in the .dynsym section. The dynamic
1682 object will contain position independent code, so all references
1683 from the dynamic object to this symbol will go through the global
1684 offset table. The dynamic linker will use the .dynsym entry to
1685 determine the address it must put in the global offset table, so
1686 both the dynamic object and the regular object will refer to the
1687 same memory location for the variable. */
1689 htab = elf_s390_hash_table (info);
1693 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1694 copy the initial value out of the dynamic object and into the
1695 runtime process image. */
1696 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
1698 s = htab->elf.sdynrelro;
1699 srel = htab->elf.sreldynrelro;
1703 s = htab->elf.sdynbss;
1704 srel = htab->elf.srelbss;
1706 if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0)
1708 srel->size += sizeof (Elf64_External_Rela);
1712 return _bfd_elf_adjust_dynamic_copy (info, h, s);
1715 /* Allocate space in .plt, .got and associated reloc sections for
1719 allocate_dynrelocs (struct elf_link_hash_entry *h,
1722 struct bfd_link_info *info;
1723 struct elf_s390_link_hash_table *htab;
1724 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry *)h;
1725 struct elf_dyn_relocs *p;
1727 if (h->root.type == bfd_link_hash_indirect)
1730 info = (struct bfd_link_info *) inf;
1731 htab = elf_s390_hash_table (info);
1735 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1736 here if it is defined and referenced in a non-shared object. */
1737 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
1738 return s390_elf_allocate_ifunc_dyn_relocs (info, h);
1739 else if (htab->elf.dynamic_sections_created
1740 && h->plt.refcount > 0)
1742 /* Make sure this symbol is output as a dynamic symbol.
1743 Undefined weak syms won't yet be marked as dynamic. */
1744 if (h->dynindx == -1
1745 && !h->forced_local)
1747 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1751 if (bfd_link_pic (info)
1752 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h))
1754 asection *s = htab->elf.splt;
1756 /* If this is the first .plt entry, make room for the special
1759 s->size += PLT_FIRST_ENTRY_SIZE;
1761 h->plt.offset = s->size;
1763 /* If this symbol is not defined in a regular file, and we are
1764 not generating a shared library, then set the symbol to this
1765 location in the .plt. This is required to make function
1766 pointers compare as equal between the normal executable and
1767 the shared library. */
1768 if (! bfd_link_pic (info)
1771 h->root.u.def.section = s;
1772 h->root.u.def.value = h->plt.offset;
1775 /* Make room for this entry. */
1776 s->size += PLT_ENTRY_SIZE;
1778 /* We also need to make an entry in the .got.plt section, which
1779 will be placed in the .got section by the linker script. */
1780 htab->elf.sgotplt->size += GOT_ENTRY_SIZE;
1782 /* We also need to make an entry in the .rela.plt section. */
1783 htab->elf.srelplt->size += sizeof (Elf64_External_Rela);
1787 h->plt.offset = (bfd_vma) -1;
1789 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1794 h->plt.offset = (bfd_vma) -1;
1796 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry *) h);
1799 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1800 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1801 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1802 we can save the dynamic TLS relocation. */
1803 if (h->got.refcount > 0
1804 && !bfd_link_pic (info)
1806 && elf_s390_hash_entry(h)->tls_type >= GOT_TLS_IE)
1808 if (elf_s390_hash_entry(h)->tls_type == GOT_TLS_IE_NLT)
1809 /* For the GOTIE access without a literal pool entry the offset has
1810 to be stored somewhere. The immediate value in the instruction
1811 is not bit enough so the value is stored in the got. */
1813 h->got.offset = htab->elf.sgot->size;
1814 htab->elf.sgot->size += GOT_ENTRY_SIZE;
1817 h->got.offset = (bfd_vma) -1;
1819 else if (h->got.refcount > 0)
1823 int tls_type = elf_s390_hash_entry(h)->tls_type;
1825 /* Make sure this symbol is output as a dynamic symbol.
1826 Undefined weak syms won't yet be marked as dynamic. */
1827 if (h->dynindx == -1
1828 && !h->forced_local)
1830 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1835 h->got.offset = s->size;
1836 s->size += GOT_ENTRY_SIZE;
1837 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1838 if (tls_type == GOT_TLS_GD)
1839 s->size += GOT_ENTRY_SIZE;
1840 dyn = htab->elf.dynamic_sections_created;
1841 /* R_390_TLS_IE64 needs one dynamic relocation,
1842 R_390_TLS_GD64 needs one if local symbol and two if global. */
1843 if ((tls_type == GOT_TLS_GD && h->dynindx == -1)
1844 || tls_type >= GOT_TLS_IE)
1845 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1846 else if (tls_type == GOT_TLS_GD)
1847 htab->elf.srelgot->size += 2 * sizeof (Elf64_External_Rela);
1848 else if ((ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
1849 || h->root.type != bfd_link_hash_undefweak)
1850 && (bfd_link_pic (info)
1851 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h)))
1852 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
1855 h->got.offset = (bfd_vma) -1;
1857 if (eh->dyn_relocs == NULL)
1860 /* In the shared -Bsymbolic case, discard space allocated for
1861 dynamic pc-relative relocs against symbols which turn out to be
1862 defined in regular objects. For the normal shared case, discard
1863 space for pc-relative relocs that have become local due to symbol
1864 visibility changes. */
1866 if (bfd_link_pic (info))
1868 if (SYMBOL_CALLS_LOCAL (info, h))
1870 struct elf_dyn_relocs **pp;
1872 for (pp = &eh->dyn_relocs; (p = *pp) != NULL; )
1874 p->count -= p->pc_count;
1883 /* Also discard relocs on undefined weak syms with non-default
1885 if (eh->dyn_relocs != NULL
1886 && h->root.type == bfd_link_hash_undefweak)
1888 if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
1889 eh->dyn_relocs = NULL;
1891 /* Make sure undefined weak symbols are output as a dynamic
1893 else if (h->dynindx == -1
1894 && !h->forced_local)
1896 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1901 else if (ELIMINATE_COPY_RELOCS)
1903 /* For the non-shared case, discard space for relocs against
1904 symbols which turn out to need copy relocs or are not
1910 || (htab->elf.dynamic_sections_created
1911 && (h->root.type == bfd_link_hash_undefweak
1912 || h->root.type == bfd_link_hash_undefined))))
1914 /* Make sure this symbol is output as a dynamic symbol.
1915 Undefined weak syms won't yet be marked as dynamic. */
1916 if (h->dynindx == -1
1917 && !h->forced_local)
1919 if (! bfd_elf_link_record_dynamic_symbol (info, h))
1923 /* If that succeeded, we know we'll be keeping all the
1925 if (h->dynindx != -1)
1929 eh->dyn_relocs = NULL;
1934 /* Finally, allocate space. */
1935 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1937 asection *sreloc = elf_section_data (p->sec)->sreloc;
1938 sreloc->size += p->count * sizeof (Elf64_External_Rela);
1944 /* Find any dynamic relocs that apply to read-only sections. */
1947 readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf)
1949 struct elf_s390_link_hash_entry *eh;
1950 struct elf_dyn_relocs *p;
1952 eh = (struct elf_s390_link_hash_entry *) h;
1953 for (p = eh->dyn_relocs; p != NULL; p = p->next)
1955 asection *s = p->sec->output_section;
1957 if (s != NULL && (s->flags & SEC_READONLY) != 0)
1959 struct bfd_link_info *info = (struct bfd_link_info *) inf;
1961 info->flags |= DF_TEXTREL;
1963 /* Not an error, just cut short the traversal. */
1970 /* Set the sizes of the dynamic sections. */
1973 elf_s390_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED,
1974 struct bfd_link_info *info)
1976 struct elf_s390_link_hash_table *htab;
1982 htab = elf_s390_hash_table (info);
1986 dynobj = htab->elf.dynobj;
1990 if (htab->elf.dynamic_sections_created)
1992 /* Set the contents of the .interp section to the interpreter. */
1993 if (bfd_link_executable (info) && !info->nointerp)
1995 s = bfd_get_linker_section (dynobj, ".interp");
1998 s->size = sizeof ELF_DYNAMIC_INTERPRETER;
1999 s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER;
2003 /* Set up .got offsets for local syms, and space for local dynamic
2005 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
2007 bfd_signed_vma *local_got;
2008 bfd_signed_vma *end_local_got;
2009 char *local_tls_type;
2010 bfd_size_type locsymcount;
2011 Elf_Internal_Shdr *symtab_hdr;
2013 struct plt_entry *local_plt;
2016 if (! is_s390_elf (ibfd))
2019 for (s = ibfd->sections; s != NULL; s = s->next)
2021 struct elf_dyn_relocs *p;
2023 for (p = elf_section_data (s)->local_dynrel; p != NULL; p = p->next)
2025 if (!bfd_is_abs_section (p->sec)
2026 && bfd_is_abs_section (p->sec->output_section))
2028 /* Input section has been discarded, either because
2029 it is a copy of a linkonce section or due to
2030 linker script /DISCARD/, so we'll be discarding
2033 else if (p->count != 0)
2035 srela = elf_section_data (p->sec)->sreloc;
2036 srela->size += p->count * sizeof (Elf64_External_Rela);
2037 if ((p->sec->output_section->flags & SEC_READONLY) != 0)
2038 info->flags |= DF_TEXTREL;
2043 local_got = elf_local_got_refcounts (ibfd);
2047 symtab_hdr = &elf_symtab_hdr (ibfd);
2048 locsymcount = symtab_hdr->sh_info;
2049 end_local_got = local_got + locsymcount;
2050 local_tls_type = elf_s390_local_got_tls_type (ibfd);
2052 srela = htab->elf.srelgot;
2053 for (; local_got < end_local_got; ++local_got, ++local_tls_type)
2057 *local_got = s->size;
2058 s->size += GOT_ENTRY_SIZE;
2059 if (*local_tls_type == GOT_TLS_GD)
2060 s->size += GOT_ENTRY_SIZE;
2061 if (bfd_link_pic (info))
2062 srela->size += sizeof (Elf64_External_Rela);
2065 *local_got = (bfd_vma) -1;
2068 local_plt = elf_s390_local_plt (ibfd);
2069 for (i = 0; i < symtab_hdr->sh_info; i++)
2071 if (local_plt[i].plt.refcount > 0)
2073 local_plt[i].plt.offset = htab->elf.iplt->size;
2074 htab->elf.iplt->size += PLT_ENTRY_SIZE;
2075 htab->elf.igotplt->size += GOT_ENTRY_SIZE;
2076 htab->elf.irelplt->size += sizeof (Elf64_External_Rela);
2079 local_plt[i].plt.offset = (bfd_vma) -1;
2083 if (htab->tls_ldm_got.refcount > 0)
2085 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2087 htab->tls_ldm_got.offset = htab->elf.sgot->size;
2088 htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE;
2089 htab->elf.srelgot->size += sizeof (Elf64_External_Rela);
2092 htab->tls_ldm_got.offset = -1;
2094 /* Allocate global sym .plt and .got entries, and space for global
2095 sym dynamic relocs. */
2096 elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, info);
2098 /* We now have determined the sizes of the various dynamic sections.
2099 Allocate memory for them. */
2101 for (s = dynobj->sections; s != NULL; s = s->next)
2103 if ((s->flags & SEC_LINKER_CREATED) == 0)
2106 if (s == htab->elf.splt
2107 || s == htab->elf.sgot
2108 || s == htab->elf.sgotplt
2109 || s == htab->elf.sdynbss
2110 || s == htab->elf.sdynrelro
2111 || s == htab->elf.iplt
2112 || s == htab->elf.igotplt
2113 || s == htab->irelifunc)
2115 /* Strip this section if we don't need it; see the
2118 else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela"))
2120 if (s->size != 0 && s != htab->elf.srelplt)
2123 /* We use the reloc_count field as a counter if we need
2124 to copy relocs into the output file. */
2129 /* It's not one of our sections, so don't allocate space. */
2135 /* If we don't need this section, strip it from the
2136 output file. This is to handle .rela.bss and
2137 .rela.plt. We must create it in
2138 create_dynamic_sections, because it must be created
2139 before the linker maps input sections to output
2140 sections. The linker does that before
2141 adjust_dynamic_symbol is called, and it is that
2142 function which decides whether anything needs to go
2143 into these sections. */
2145 s->flags |= SEC_EXCLUDE;
2149 if ((s->flags & SEC_HAS_CONTENTS) == 0)
2152 /* Allocate memory for the section contents. We use bfd_zalloc
2153 here in case unused entries are not reclaimed before the
2154 section's contents are written out. This should not happen,
2155 but this way if it does, we get a R_390_NONE reloc instead
2157 s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size);
2158 if (s->contents == NULL)
2162 if (htab->elf.dynamic_sections_created)
2164 /* Add some entries to the .dynamic section. We fill in the
2165 values later, in elf_s390_finish_dynamic_sections, but we
2166 must add the entries now so that we get the correct size for
2167 the .dynamic section. The DT_DEBUG entry is filled in by the
2168 dynamic linker and used by the debugger. */
2169 #define add_dynamic_entry(TAG, VAL) \
2170 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2172 if (bfd_link_executable (info))
2174 if (!add_dynamic_entry (DT_DEBUG, 0))
2178 if (htab->elf.splt->size != 0)
2180 if (!add_dynamic_entry (DT_PLTGOT, 0)
2181 || !add_dynamic_entry (DT_PLTRELSZ, 0)
2182 || !add_dynamic_entry (DT_PLTREL, DT_RELA)
2183 || !add_dynamic_entry (DT_JMPREL, 0))
2189 if (!add_dynamic_entry (DT_RELA, 0)
2190 || !add_dynamic_entry (DT_RELASZ, 0)
2191 || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela)))
2194 /* If any dynamic relocs apply to a read-only section,
2195 then we need a DT_TEXTREL entry. */
2196 if ((info->flags & DF_TEXTREL) == 0)
2197 elf_link_hash_traverse (&htab->elf, readonly_dynrelocs,
2200 if ((info->flags & DF_TEXTREL) != 0)
2202 if (!add_dynamic_entry (DT_TEXTREL, 0))
2207 #undef add_dynamic_entry
2212 /* Return the base VMA address which should be subtracted from real addresses
2213 when resolving @dtpoff relocation.
2214 This is PT_TLS segment p_vaddr. */
2217 dtpoff_base (struct bfd_link_info *info)
2219 /* If tls_sec is NULL, we should have signalled an error already. */
2220 if (elf_hash_table (info)->tls_sec == NULL)
2222 return elf_hash_table (info)->tls_sec->vma;
2225 /* Return the relocation value for @tpoff relocation
2226 if STT_TLS virtual address is ADDRESS. */
2229 tpoff (struct bfd_link_info *info, bfd_vma address)
2231 struct elf_link_hash_table *htab = elf_hash_table (info);
2233 /* If tls_sec is NULL, we should have signalled an error already. */
2234 if (htab->tls_sec == NULL)
2236 return htab->tls_size + htab->tls_sec->vma - address;
2239 /* Complain if TLS instruction relocation is against an invalid
2243 invalid_tls_insn (bfd *input_bfd,
2244 asection *input_section,
2245 Elf_Internal_Rela *rel)
2247 reloc_howto_type *howto;
2249 howto = elf_howto_table + ELF64_R_TYPE (rel->r_info);
2251 /* xgettext:c-format */
2252 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2255 (long) rel->r_offset,
2257 bfd_set_error (bfd_error_bad_value);
2260 /* Relocate a 390 ELF section. */
2263 elf_s390_relocate_section (bfd *output_bfd,
2264 struct bfd_link_info *info,
2266 asection *input_section,
2268 Elf_Internal_Rela *relocs,
2269 Elf_Internal_Sym *local_syms,
2270 asection **local_sections)
2272 struct elf_s390_link_hash_table *htab;
2273 Elf_Internal_Shdr *symtab_hdr;
2274 struct elf_link_hash_entry **sym_hashes;
2275 bfd_vma *local_got_offsets;
2276 Elf_Internal_Rela *rel;
2277 Elf_Internal_Rela *relend;
2279 BFD_ASSERT (is_s390_elf (input_bfd));
2281 htab = elf_s390_hash_table (info);
2285 symtab_hdr = &elf_symtab_hdr (input_bfd);
2286 sym_hashes = elf_sym_hashes (input_bfd);
2287 local_got_offsets = elf_local_got_offsets (input_bfd);
2290 relend = relocs + input_section->reloc_count;
2291 for (; rel < relend; rel++)
2293 unsigned int r_type;
2294 reloc_howto_type *howto;
2295 unsigned long r_symndx;
2296 struct elf_link_hash_entry *h;
2297 Elf_Internal_Sym *sym;
2301 bfd_boolean unresolved_reloc;
2302 bfd_reloc_status_type r;
2304 asection *base_got = htab->elf.sgot;
2306 r_type = ELF64_R_TYPE (rel->r_info);
2307 if (r_type == (int) R_390_GNU_VTINHERIT
2308 || r_type == (int) R_390_GNU_VTENTRY)
2310 if (r_type >= (int) R_390_max)
2312 bfd_set_error (bfd_error_bad_value);
2316 howto = elf_howto_table + r_type;
2317 r_symndx = ELF64_R_SYM (rel->r_info);
2322 unresolved_reloc = FALSE;
2323 if (r_symndx < symtab_hdr->sh_info)
2325 sym = local_syms + r_symndx;
2326 sec = local_sections[r_symndx];
2328 if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC)
2330 struct plt_entry *local_plt = elf_s390_local_plt (input_bfd);
2331 if (local_plt == NULL)
2334 /* Address of the PLT slot. */
2335 relocation = (htab->elf.iplt->output_section->vma
2336 + htab->elf.iplt->output_offset
2337 + local_plt[r_symndx].plt.offset);
2341 case R_390_PLTOFF16:
2342 case R_390_PLTOFF32:
2343 case R_390_PLTOFF64:
2344 relocation -= htab->elf.sgot->output_section->vma;
2346 case R_390_GOTPLT12:
2347 case R_390_GOTPLT16:
2348 case R_390_GOTPLT20:
2349 case R_390_GOTPLT32:
2350 case R_390_GOTPLT64:
2351 case R_390_GOTPLTENT:
2359 /* Write the PLT slot address into the GOT slot. */
2360 bfd_put_64 (output_bfd, relocation,
2361 htab->elf.sgot->contents +
2362 local_got_offsets[r_symndx]);
2363 relocation = (local_got_offsets[r_symndx] +
2364 htab->elf.sgot->output_offset);
2366 if (r_type == R_390_GOTENT || r_type == R_390_GOTPLTENT)
2367 relocation += htab->elf.sgot->output_section->vma;
2373 /* The output section is needed later in
2374 finish_dynamic_section when creating the dynamic
2376 local_plt[r_symndx].sec = sec;
2380 relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel);
2384 bfd_boolean warned ATTRIBUTE_UNUSED;
2385 bfd_boolean ignored ATTRIBUTE_UNUSED;
2387 RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel,
2388 r_symndx, symtab_hdr, sym_hashes,
2390 unresolved_reloc, warned, ignored);
2393 if (sec != NULL && discarded_section (sec))
2394 RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section,
2395 rel, 1, relend, howto, 0, contents);
2397 if (bfd_link_relocatable (info))
2402 case R_390_GOTPLT12:
2403 case R_390_GOTPLT16:
2404 case R_390_GOTPLT20:
2405 case R_390_GOTPLT32:
2406 case R_390_GOTPLT64:
2407 case R_390_GOTPLTENT:
2408 /* There are three cases for a GOTPLT relocation. 1) The
2409 relocation is against the jump slot entry of a plt that
2410 will get emitted to the output file. 2) The relocation
2411 is against the jump slot of a plt entry that has been
2412 removed. elf_s390_adjust_gotplt has created a GOT entry
2413 as replacement. 3) The relocation is against a local symbol.
2414 Cases 2) and 3) are the same as the GOT relocation code
2415 so we just have to test for case 1 and fall through for
2417 if (h != NULL && h->plt.offset != (bfd_vma) -1)
2421 if (s390_is_ifunc_symbol_p (h))
2423 plt_index = h->plt.offset / PLT_ENTRY_SIZE;
2424 relocation = (plt_index * GOT_ENTRY_SIZE +
2425 htab->elf.igotplt->output_offset);
2426 if (r_type == R_390_GOTPLTENT)
2427 relocation += htab->elf.igotplt->output_section->vma;
2432 Current offset - size first entry / entry size. */
2433 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) /
2436 /* Offset in GOT is PLT index plus GOT headers(3)
2437 times 8, addr & GOT addr. */
2438 relocation = (plt_index + 3) * GOT_ENTRY_SIZE;
2439 if (r_type == R_390_GOTPLTENT)
2440 relocation += htab->elf.sgot->output_section->vma;
2442 unresolved_reloc = FALSE;
2453 /* Relocation is to the entry for this symbol in the global
2455 if (base_got == NULL)
2462 off = h->got.offset;
2463 dyn = htab->elf.dynamic_sections_created;
2465 if (s390_is_ifunc_symbol_p (h))
2467 BFD_ASSERT (h->plt.offset != (bfd_vma) -1);
2468 if (off == (bfd_vma)-1)
2470 /* No explicit GOT usage so redirect to the
2472 base_got = htab->elf.igotplt;
2473 off = h->plt.offset / PLT_ENTRY_SIZE * GOT_ENTRY_SIZE;
2477 /* Explicit GOT slots must contain the address
2478 of the PLT slot. This will be handled in
2479 finish_dynamic_symbol. */
2482 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn,
2483 bfd_link_pic (info),
2485 || (bfd_link_pic (info)
2486 && SYMBOL_REFERENCES_LOCAL (info, h))
2487 || (ELF_ST_VISIBILITY (h->other)
2488 && h->root.type == bfd_link_hash_undefweak))
2490 /* This is actually a static link, or it is a
2491 -Bsymbolic link and the symbol is defined
2492 locally, or the symbol was forced to be local
2493 because of a version file. We must initialize
2494 this entry in the global offset table. Since the
2495 offset must always be a multiple of 2, we use the
2496 least significant bit to record whether we have
2497 initialized it already.
2499 When doing a dynamic link, we create a .rel.got
2500 relocation entry to initialize the value. This
2501 is done in the finish_dynamic_symbol routine. */
2506 bfd_put_64 (output_bfd, relocation,
2507 base_got->contents + off);
2512 && bfd_link_pic (info)
2513 && SYMBOL_REFERENCES_LOCAL (info, h))
2514 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2515 && ((r_type == R_390_GOTENT
2516 && (bfd_get_16 (input_bfd,
2517 contents + rel->r_offset - 2)
2518 & 0xff0f) == 0xc408)
2519 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2520 || (r_type == R_390_GOT20
2521 && (bfd_get_32 (input_bfd,
2522 contents + rel->r_offset - 2)
2523 & 0xff00f000) == 0xe300c000
2524 && bfd_get_8 (input_bfd,
2525 contents + rel->r_offset + 3) == 0x04)))
2528 unsigned short new_insn =
2529 (0xc000 | (bfd_get_8 (input_bfd,
2530 contents + rel->r_offset - 1) & 0xf0));
2531 bfd_put_16 (output_bfd, new_insn,
2532 contents + rel->r_offset - 2);
2533 r_type = R_390_PC32DBL;
2535 howto = elf_howto_table + r_type;
2536 relocation = h->root.u.def.value
2537 + h->root.u.def.section->output_section->vma
2538 + h->root.u.def.section->output_offset;
2543 unresolved_reloc = FALSE;
2547 if (local_got_offsets == NULL)
2550 off = local_got_offsets[r_symndx];
2552 /* The offset must always be a multiple of 8. We use
2553 the least significant bit to record whether we have
2554 already generated the necessary reloc. */
2559 bfd_put_64 (output_bfd, relocation,
2560 htab->elf.sgot->contents + off);
2562 if (bfd_link_pic (info))
2565 Elf_Internal_Rela outrel;
2568 s = htab->elf.srelgot;
2572 outrel.r_offset = (htab->elf.sgot->output_section->vma
2573 + htab->elf.sgot->output_offset
2575 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2576 outrel.r_addend = relocation;
2578 loc += s->reloc_count++ * sizeof (Elf64_External_Rela);
2579 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2582 local_got_offsets[r_symndx] |= 1;
2586 if (off >= (bfd_vma) -2)
2589 relocation = base_got->output_offset + off;
2591 /* For @GOTENT the relocation is against the offset between
2592 the instruction and the symbols entry in the GOT and not
2593 between the start of the GOT and the symbols entry. We
2594 add the vma of the GOT to get the correct value. */
2595 if ( r_type == R_390_GOTENT
2596 || r_type == R_390_GOTPLTENT)
2597 relocation += base_got->output_section->vma;
2601 case R_390_GOTOFF16:
2602 case R_390_GOTOFF32:
2603 case R_390_GOTOFF64:
2604 /* Relocation is relative to the start of the global offset
2608 && s390_is_ifunc_symbol_p (h)
2610 && !bfd_link_executable (info))
2612 relocation = (htab->elf.iplt->output_section->vma
2613 + htab->elf.iplt->output_offset
2615 - htab->elf.sgot->output_section->vma);
2619 /* Note that sgot->output_offset is not involved in this
2620 calculation. We always want the start of .got. If we
2621 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2622 permitted by the ABI, we might have to change this
2624 relocation -= htab->elf.sgot->output_section->vma;
2628 case R_390_GOTPCDBL:
2629 /* Use global offset table as symbol value. */
2630 relocation = htab->elf.sgot->output_section->vma;
2631 unresolved_reloc = FALSE;
2634 case R_390_PLT12DBL:
2635 case R_390_PLT16DBL:
2636 case R_390_PLT24DBL:
2638 case R_390_PLT32DBL:
2640 /* Relocation is to the entry for this symbol in the
2641 procedure linkage table. */
2643 /* Resolve a PLT32 reloc against a local symbol directly,
2644 without using the procedure linkage table. */
2648 if (h->plt.offset == (bfd_vma) -1
2649 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2651 /* We didn't make a PLT entry for this symbol. This
2652 happens when statically linking PIC code, or when
2653 using -Bsymbolic. */
2656 if (s390_is_ifunc_symbol_p (h))
2657 relocation = (htab->elf.iplt->output_section->vma
2658 + htab->elf.iplt->output_offset
2661 relocation = (htab->elf.splt->output_section->vma
2662 + htab->elf.splt->output_offset
2664 unresolved_reloc = FALSE;
2667 case R_390_PLTOFF16:
2668 case R_390_PLTOFF32:
2669 case R_390_PLTOFF64:
2670 /* Relocation is to the entry for this symbol in the
2671 procedure linkage table relative to the start of the GOT. */
2673 /* For local symbols or if we didn't make a PLT entry for
2674 this symbol resolve the symbol directly. */
2676 || h->plt.offset == (bfd_vma) -1
2677 || (htab->elf.splt == NULL && !s390_is_ifunc_symbol_p (h)))
2679 relocation -= htab->elf.sgot->output_section->vma;
2683 if (s390_is_ifunc_symbol_p (h))
2684 relocation = (htab->elf.iplt->output_section->vma
2685 + htab->elf.iplt->output_offset
2687 - htab->elf.sgot->output_section->vma);
2689 relocation = (htab->elf.splt->output_section->vma
2690 + htab->elf.splt->output_offset
2692 - htab->elf.sgot->output_section->vma);
2693 unresolved_reloc = FALSE;
2703 /* The target of these relocs are instruction operands
2704 residing in read-only sections. We cannot emit a runtime
2707 && s390_is_ifunc_symbol_p (h)
2709 && bfd_link_pic (info))
2711 relocation = (htab->elf.iplt->output_section->vma
2712 + htab->elf.iplt->output_offset
2724 && s390_is_ifunc_symbol_p (h)
2727 if (!bfd_link_pic (info) || !h->non_got_ref)
2729 /* For a non-shared object STT_GNU_IFUNC symbol must
2731 relocation = (htab->elf.iplt->output_section->vma
2732 + htab->elf.iplt->output_offset
2738 /* For shared objects a runtime relocation is needed. */
2740 Elf_Internal_Rela outrel;
2743 /* Need a dynamic relocation to get the real function
2745 outrel.r_offset = _bfd_elf_section_offset (output_bfd,
2749 if (outrel.r_offset == (bfd_vma) -1
2750 || outrel.r_offset == (bfd_vma) -2)
2753 outrel.r_offset += (input_section->output_section->vma
2754 + input_section->output_offset);
2756 if (h->dynindx == -1
2758 || bfd_link_executable (info))
2760 /* This symbol is resolved locally. */
2761 outrel.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
2762 outrel.r_addend = (h->root.u.def.value
2763 + h->root.u.def.section->output_section->vma
2764 + h->root.u.def.section->output_offset);
2768 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2769 outrel.r_addend = 0;
2772 sreloc = htab->elf.irelifunc;
2773 elf_append_rela (output_bfd, sreloc, &outrel);
2775 /* If this reloc is against an external symbol, we
2776 do not want to fiddle with the addend. Otherwise,
2777 we need to include the symbol value so that it
2778 becomes an addend for the dynamic reloc. For an
2779 internal symbol, we have updated addend. */
2784 if ((input_section->flags & SEC_ALLOC) == 0)
2787 if ((bfd_link_pic (info)
2789 || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT
2790 || h->root.type != bfd_link_hash_undefweak)
2791 && ((r_type != R_390_PC16
2792 && r_type != R_390_PC12DBL
2793 && r_type != R_390_PC16DBL
2794 && r_type != R_390_PC24DBL
2795 && r_type != R_390_PC32
2796 && r_type != R_390_PC32DBL
2797 && r_type != R_390_PC64)
2798 || !SYMBOL_CALLS_LOCAL (info, h)))
2799 || (ELIMINATE_COPY_RELOCS
2800 && !bfd_link_pic (info)
2806 || h->root.type == bfd_link_hash_undefweak
2807 || h->root.type == bfd_link_hash_undefined)))
2809 Elf_Internal_Rela outrel;
2810 bfd_boolean skip, relocate;
2814 /* When generating a shared object, these relocations
2815 are copied into the output file to be resolved at run
2821 _bfd_elf_section_offset (output_bfd, info, input_section,
2823 if (outrel.r_offset == (bfd_vma) -1)
2825 else if (outrel.r_offset == (bfd_vma) -2)
2826 skip = TRUE, relocate = TRUE;
2828 outrel.r_offset += (input_section->output_section->vma
2829 + input_section->output_offset);
2832 memset (&outrel, 0, sizeof outrel);
2835 && (r_type == R_390_PC16
2836 || r_type == R_390_PC12DBL
2837 || r_type == R_390_PC16DBL
2838 || r_type == R_390_PC24DBL
2839 || r_type == R_390_PC32
2840 || r_type == R_390_PC32DBL
2841 || r_type == R_390_PC64
2842 || !bfd_link_pic (info)
2843 || !SYMBOLIC_BIND (info, h)
2844 || !h->def_regular))
2846 outrel.r_info = ELF64_R_INFO (h->dynindx, r_type);
2847 outrel.r_addend = rel->r_addend;
2851 /* This symbol is local, or marked to become local. */
2852 outrel.r_addend = relocation + rel->r_addend;
2853 if (r_type == R_390_64)
2856 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2862 if (bfd_is_abs_section (sec))
2864 else if (sec == NULL || sec->owner == NULL)
2866 bfd_set_error(bfd_error_bad_value);
2873 osec = sec->output_section;
2874 sindx = elf_section_data (osec)->dynindx;
2878 osec = htab->elf.text_index_section;
2879 sindx = elf_section_data (osec)->dynindx;
2881 BFD_ASSERT (sindx != 0);
2883 /* We are turning this relocation into one
2884 against a section symbol, so subtract out
2885 the output section's address but not the
2886 offset of the input section in the output
2888 outrel.r_addend -= osec->vma;
2890 outrel.r_info = ELF64_R_INFO (sindx, r_type);
2894 sreloc = elf_section_data (input_section)->sreloc;
2898 loc = sreloc->contents;
2899 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2900 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
2902 /* If this reloc is against an external symbol, we do
2903 not want to fiddle with the addend. Otherwise, we
2904 need to include the symbol value so that it becomes
2905 an addend for the dynamic reloc. */
2912 /* Relocations for tls literal pool entries. */
2913 case R_390_TLS_IE64:
2914 if (bfd_link_pic (info))
2916 Elf_Internal_Rela outrel;
2920 outrel.r_offset = rel->r_offset
2921 + input_section->output_section->vma
2922 + input_section->output_offset;
2923 outrel.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
2924 sreloc = elf_section_data (input_section)->sreloc;
2927 loc = sreloc->contents;
2928 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
2929 bfd_elf64_swap_reloc_out (output_bfd, &outrel, loc);
2933 case R_390_TLS_GD64:
2934 case R_390_TLS_GOTIE64:
2935 r_type = elf_s390_tls_transition (info, r_type, h == NULL);
2936 tls_type = GOT_UNKNOWN;
2937 if (h == NULL && local_got_offsets)
2938 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
2941 tls_type = elf_s390_hash_entry(h)->tls_type;
2942 if (!bfd_link_pic (info) && h->dynindx == -1 && tls_type >= GOT_TLS_IE)
2943 r_type = R_390_TLS_LE64;
2945 if (r_type == R_390_TLS_GD64 && tls_type >= GOT_TLS_IE)
2946 r_type = R_390_TLS_IE64;
2948 if (r_type == R_390_TLS_LE64)
2950 /* This relocation gets optimized away by the local exec
2951 access optimization. */
2952 BFD_ASSERT (! unresolved_reloc);
2953 bfd_put_64 (output_bfd, -tpoff (info, relocation),
2954 contents + rel->r_offset);
2958 if (htab->elf.sgot == NULL)
2962 off = h->got.offset;
2965 if (local_got_offsets == NULL)
2968 off = local_got_offsets[r_symndx];
2977 Elf_Internal_Rela outrel;
2981 if (htab->elf.srelgot == NULL)
2984 outrel.r_offset = (htab->elf.sgot->output_section->vma
2985 + htab->elf.sgot->output_offset + off);
2987 indx = h && h->dynindx != -1 ? h->dynindx : 0;
2988 if (r_type == R_390_TLS_GD64)
2989 dr_type = R_390_TLS_DTPMOD;
2991 dr_type = R_390_TLS_TPOFF;
2992 if (dr_type == R_390_TLS_TPOFF && indx == 0)
2993 outrel.r_addend = relocation - dtpoff_base (info);
2995 outrel.r_addend = 0;
2996 outrel.r_info = ELF64_R_INFO (indx, dr_type);
2997 loc = htab->elf.srelgot->contents;
2998 loc += htab->elf.srelgot->reloc_count++
2999 * sizeof (Elf64_External_Rela);
3000 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3002 if (r_type == R_390_TLS_GD64)
3006 BFD_ASSERT (! unresolved_reloc);
3007 bfd_put_64 (output_bfd,
3008 relocation - dtpoff_base (info),
3009 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3013 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_DTPOFF);
3014 outrel.r_offset += GOT_ENTRY_SIZE;
3015 outrel.r_addend = 0;
3016 htab->elf.srelgot->reloc_count++;
3017 loc += sizeof (Elf64_External_Rela);
3018 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3025 local_got_offsets[r_symndx] |= 1;
3028 if (off >= (bfd_vma) -2)
3030 if (r_type == ELF64_R_TYPE (rel->r_info))
3032 relocation = htab->elf.sgot->output_offset + off;
3033 if (r_type == R_390_TLS_IE64 || r_type == R_390_TLS_IEENT)
3034 relocation += htab->elf.sgot->output_section->vma;
3035 unresolved_reloc = FALSE;
3039 bfd_put_64 (output_bfd, htab->elf.sgot->output_offset + off,
3040 contents + rel->r_offset);
3045 case R_390_TLS_GOTIE12:
3046 case R_390_TLS_GOTIE20:
3047 case R_390_TLS_IEENT:
3050 if (local_got_offsets == NULL)
3052 off = local_got_offsets[r_symndx];
3053 if (bfd_link_pic (info))
3054 goto emit_tls_relocs;
3058 off = h->got.offset;
3059 tls_type = elf_s390_hash_entry(h)->tls_type;
3060 if (bfd_link_pic (info) || h->dynindx != -1 || tls_type < GOT_TLS_IE)
3061 goto emit_tls_relocs;
3064 if (htab->elf.sgot == NULL)
3067 BFD_ASSERT (! unresolved_reloc);
3068 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3069 htab->elf.sgot->contents + off);
3070 relocation = htab->elf.sgot->output_offset + off;
3071 if (r_type == R_390_TLS_IEENT)
3072 relocation += htab->elf.sgot->output_section->vma;
3073 unresolved_reloc = FALSE;
3076 case R_390_TLS_LDM64:
3077 if (! bfd_link_pic (info))
3078 /* The literal pool entry this relocation refers to gets ignored
3079 by the optimized code of the local exec model. Do nothing
3080 and the value will turn out zero. */
3083 if (htab->elf.sgot == NULL)
3086 off = htab->tls_ldm_got.offset;
3091 Elf_Internal_Rela outrel;
3094 if (htab->elf.srelgot == NULL)
3097 outrel.r_offset = (htab->elf.sgot->output_section->vma
3098 + htab->elf.sgot->output_offset + off);
3100 bfd_put_64 (output_bfd, 0,
3101 htab->elf.sgot->contents + off + GOT_ENTRY_SIZE);
3102 outrel.r_info = ELF64_R_INFO (0, R_390_TLS_DTPMOD);
3103 outrel.r_addend = 0;
3104 loc = htab->elf.srelgot->contents;
3105 loc += htab->elf.srelgot->reloc_count++
3106 * sizeof (Elf64_External_Rela);
3107 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3108 htab->tls_ldm_got.offset |= 1;
3110 relocation = htab->elf.sgot->output_offset + off;
3111 unresolved_reloc = FALSE;
3114 case R_390_TLS_LE64:
3115 if (bfd_link_dll (info))
3117 /* Linking a shared library with non-fpic code requires
3118 a R_390_TLS_TPOFF relocation. */
3119 Elf_Internal_Rela outrel;
3124 outrel.r_offset = rel->r_offset
3125 + input_section->output_section->vma
3126 + input_section->output_offset;
3127 if (h != NULL && h->dynindx != -1)
3131 outrel.r_info = ELF64_R_INFO (indx, R_390_TLS_TPOFF);
3133 outrel.r_addend = relocation - dtpoff_base (info);
3135 outrel.r_addend = 0;
3136 sreloc = elf_section_data (input_section)->sreloc;
3139 loc = sreloc->contents;
3140 loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela);
3141 bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc);
3145 BFD_ASSERT (! unresolved_reloc);
3146 bfd_put_64 (output_bfd, -tpoff (info, relocation),
3147 contents + rel->r_offset);
3151 case R_390_TLS_LDO64:
3152 if (bfd_link_pic (info) || (input_section->flags & SEC_DEBUGGING))
3153 relocation -= dtpoff_base (info);
3155 /* When converting LDO to LE, we must negate. */
3156 relocation = -tpoff (info, relocation);
3159 /* Relocations for tls instructions. */
3160 case R_390_TLS_LOAD:
3161 case R_390_TLS_GDCALL:
3162 case R_390_TLS_LDCALL:
3163 tls_type = GOT_UNKNOWN;
3164 if (h == NULL && local_got_offsets)
3165 tls_type = elf_s390_local_got_tls_type (input_bfd) [r_symndx];
3167 tls_type = elf_s390_hash_entry(h)->tls_type;
3169 if (tls_type == GOT_TLS_GD)
3172 if (r_type == R_390_TLS_LOAD)
3174 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3176 /* IE->LE transition. Four valid cases:
3177 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3178 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3179 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3180 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3181 unsigned int insn0, insn1, ry;
3183 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3184 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3185 if (insn1 != 0x0004)
3186 invalid_tls_insn (input_bfd, input_section, rel);
3188 if ((insn0 & 0xff00f000) == 0xe3000000)
3189 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3190 ry = (insn0 & 0x000f0000);
3191 else if ((insn0 & 0xff0f0000) == 0xe3000000)
3192 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3193 ry = (insn0 & 0x0000f000) << 4;
3194 else if ((insn0 & 0xff00f000) == 0xe300c000)
3195 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3196 ry = (insn0 & 0x000f0000);
3197 else if ((insn0 & 0xff0f0000) == 0xe30c0000)
3198 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3199 ry = (insn0 & 0x0000f000) << 4;
3201 invalid_tls_insn (input_bfd, input_section, rel);
3202 insn0 = 0xeb000000 | (insn0 & 0x00f00000) | ry;
3204 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3205 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3208 else if (r_type == R_390_TLS_GDCALL)
3210 unsigned int insn0, insn1;
3212 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3213 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3214 if ((insn0 & 0xffff0000) != 0xc0e50000)
3215 invalid_tls_insn (input_bfd, input_section, rel);
3216 if (!bfd_link_pic (info) && (h == NULL || h->dynindx == -1))
3218 /* GD->LE transition.
3219 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3225 /* GD->IE transition.
3226 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3230 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3231 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3233 else if (r_type == R_390_TLS_LDCALL)
3235 if (!bfd_link_pic (info))
3237 unsigned int insn0, insn1;
3239 insn0 = bfd_get_32 (input_bfd, contents + rel->r_offset);
3240 insn1 = bfd_get_16 (input_bfd, contents + rel->r_offset + 4);
3241 if ((insn0 & 0xffff0000) != 0xc0e50000)
3242 invalid_tls_insn (input_bfd, input_section, rel);
3243 /* LD->LE transition.
3244 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3247 bfd_put_32 (output_bfd, insn0, contents + rel->r_offset);
3248 bfd_put_16 (output_bfd, insn1, contents + rel->r_offset + 4);
3257 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3258 because such sections are not SEC_ALLOC and thus ld.so will
3259 not process them. */
3260 if (unresolved_reloc
3261 && !((input_section->flags & SEC_DEBUGGING) != 0
3263 && _bfd_elf_section_offset (output_bfd, info, input_section,
3264 rel->r_offset) != (bfd_vma) -1)
3266 /* xgettext:c-format */
3267 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3270 (long) rel->r_offset,
3272 h->root.root.string);
3276 /* When applying a 24 bit reloc we need to start one byte
3277 earlier. Otherwise the 32 bit get/put bfd operations might
3278 access a byte after the actual section. */
3279 if (r_type == R_390_PC24DBL
3280 || r_type == R_390_PLT24DBL)
3283 if (r_type == R_390_20
3284 || r_type == R_390_GOT20
3285 || r_type == R_390_GOTPLT20
3286 || r_type == R_390_TLS_GOTIE20)
3288 relocation += rel->r_addend;
3289 relocation = (relocation&0xfff) << 8 | (relocation&0xff000) >> 12;
3290 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3291 contents, rel->r_offset,
3295 r = _bfd_final_link_relocate (howto, input_bfd, input_section,
3296 contents, rel->r_offset,
3297 relocation, rel->r_addend);
3299 if (r != bfd_reloc_ok)
3304 name = h->root.root.string;
3307 name = bfd_elf_string_from_elf_section (input_bfd,
3308 symtab_hdr->sh_link,
3313 name = bfd_section_name (input_bfd, sec);
3316 if (r == bfd_reloc_overflow)
3317 (*info->callbacks->reloc_overflow)
3318 (info, (h ? &h->root : NULL), name, howto->name,
3319 (bfd_vma) 0, input_bfd, input_section, rel->r_offset);
3323 /* xgettext:c-format */
3324 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3325 input_bfd, input_section,
3326 (long) rel->r_offset, name, (int) r);
3335 /* Generate the PLT slots together with the dynamic relocations needed
3336 for IFUNC symbols. */
3339 elf_s390_finish_ifunc_symbol (bfd *output_bfd,
3340 struct bfd_link_info *info,
3341 struct elf_link_hash_entry *h,
3342 struct elf_s390_link_hash_table *htab,
3344 bfd_vma resolver_address)
3348 Elf_Internal_Rela rela;
3350 asection *plt, *gotplt, *relplt;
3352 if (htab->elf.iplt == NULL
3353 || htab->elf.igotplt == NULL
3354 || htab->elf.irelplt == NULL)
3357 /* Index of the PLT slot within iplt section. */
3358 plt_index = plt_offset / PLT_ENTRY_SIZE;
3359 plt = htab->elf.iplt;
3360 /* Offset into the igot.plt section. */
3361 got_offset = plt_index * GOT_ENTRY_SIZE;
3362 gotplt = htab->elf.igotplt;
3363 relplt = htab->elf.irelplt;
3365 /* Fill in the blueprint of a PLT. */
3366 memcpy (plt->contents + plt_offset, elf_s390x_plt_entry,
3369 /* Fixup the relative address to the GOT entry */
3370 bfd_put_32 (output_bfd,
3371 (gotplt->output_section->vma +
3372 gotplt->output_offset + got_offset
3373 - (plt->output_section->vma +
3374 plt->output_offset +
3376 plt->contents + plt_offset + 2);
3377 /* Fixup the relative branch to PLT 0 */
3378 bfd_put_32 (output_bfd, - (plt->output_offset +
3379 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3380 plt->contents + plt_offset + 24);
3381 /* Fixup offset into .rela.plt section. */
3382 bfd_put_32 (output_bfd, relplt->output_offset +
3383 plt_index * sizeof (Elf64_External_Rela),
3384 plt->contents + plt_offset + 28);
3386 /* Fill in the entry in the global offset table.
3387 Points to instruction after GOT offset. */
3388 bfd_put_64 (output_bfd,
3389 (plt->output_section->vma
3390 + plt->output_offset
3393 gotplt->contents + got_offset);
3395 /* Fill in the entry in the .rela.plt section. */
3396 rela.r_offset = (gotplt->output_section->vma
3397 + gotplt->output_offset
3402 || ((bfd_link_executable (info)
3403 || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT)
3406 /* The symbol can be locally resolved. */
3407 rela.r_info = ELF64_R_INFO (0, R_390_IRELATIVE);
3408 rela.r_addend = resolver_address;
3412 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3416 loc = relplt->contents + plt_index * sizeof (Elf64_External_Rela);
3417 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3421 /* Finish up dynamic symbol handling. We set the contents of various
3422 dynamic sections here. */
3425 elf_s390_finish_dynamic_symbol (bfd *output_bfd,
3426 struct bfd_link_info *info,
3427 struct elf_link_hash_entry *h,
3428 Elf_Internal_Sym *sym)
3430 struct elf_s390_link_hash_table *htab;
3431 struct elf_s390_link_hash_entry *eh = (struct elf_s390_link_hash_entry*)h;
3433 htab = elf_s390_hash_table (info);
3437 if (h->plt.offset != (bfd_vma) -1)
3441 Elf_Internal_Rela rela;
3444 /* This symbol has an entry in the procedure linkage table. Set
3446 if (s390_is_ifunc_symbol_p (h) && h->def_regular)
3448 elf_s390_finish_ifunc_symbol (output_bfd, info, h,
3449 htab, h->plt.offset,
3450 eh->ifunc_resolver_address +
3451 eh->ifunc_resolver_section->output_offset +
3452 eh->ifunc_resolver_section->output_section->vma);
3454 /* Do not return yet. Handling of explicit GOT slots of
3455 IFUNC symbols is below. */
3459 if (h->dynindx == -1
3460 || htab->elf.splt == NULL
3461 || htab->elf.sgotplt == NULL
3462 || htab->elf.srelplt == NULL)
3466 Current offset - size first entry / entry size. */
3467 plt_index = (h->plt.offset - PLT_FIRST_ENTRY_SIZE) / PLT_ENTRY_SIZE;
3469 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3471 got_offset = (plt_index + 3) * GOT_ENTRY_SIZE;
3473 /* Fill in the blueprint of a PLT. */
3474 memcpy (htab->elf.splt->contents + h->plt.offset, elf_s390x_plt_entry,
3477 /* Fixup the relative address to the GOT entry */
3478 bfd_put_32 (output_bfd,
3479 (htab->elf.sgotplt->output_section->vma +
3480 htab->elf.sgotplt->output_offset + got_offset
3481 - (htab->elf.splt->output_section->vma +
3482 htab->elf.splt->output_offset +
3484 htab->elf.splt->contents + h->plt.offset + 2);
3485 /* Fixup the relative branch to PLT 0 */
3486 bfd_put_32 (output_bfd, - (PLT_FIRST_ENTRY_SIZE +
3487 (PLT_ENTRY_SIZE * plt_index) + 22)/2,
3488 htab->elf.splt->contents + h->plt.offset + 24);
3489 /* Fixup offset into .rela.plt section. */
3490 bfd_put_32 (output_bfd, plt_index * sizeof (Elf64_External_Rela),
3491 htab->elf.splt->contents + h->plt.offset + 28);
3493 /* Fill in the entry in the global offset table.
3494 Points to instruction after GOT offset. */
3495 bfd_put_64 (output_bfd,
3496 (htab->elf.splt->output_section->vma
3497 + htab->elf.splt->output_offset
3500 htab->elf.sgotplt->contents + got_offset);
3502 /* Fill in the entry in the .rela.plt section. */
3503 rela.r_offset = (htab->elf.sgotplt->output_section->vma
3504 + htab->elf.sgotplt->output_offset
3506 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_JMP_SLOT);
3508 loc = htab->elf.srelplt->contents + plt_index *
3509 sizeof (Elf64_External_Rela);
3510 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3512 if (!h->def_regular)
3514 /* Mark the symbol as undefined, rather than as defined in
3515 the .plt section. Leave the value alone. This is a clue
3516 for the dynamic linker, to make function pointer
3517 comparisons work between an application and shared
3519 sym->st_shndx = SHN_UNDEF;
3524 if (h->got.offset != (bfd_vma) -1
3525 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_GD
3526 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE
3527 && elf_s390_hash_entry(h)->tls_type != GOT_TLS_IE_NLT)
3529 Elf_Internal_Rela rela;
3532 /* This symbol has an entry in the global offset table. Set it
3534 if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL)
3537 rela.r_offset = (htab->elf.sgot->output_section->vma
3538 + htab->elf.sgot->output_offset
3539 + (h->got.offset &~ (bfd_vma) 1));
3541 if (h->def_regular && s390_is_ifunc_symbol_p (h))
3543 if (bfd_link_pic (info))
3545 /* An explicit GOT slot usage needs GLOB_DAT. If the
3546 symbol references local the implicit got.iplt slot
3547 will be used and the IRELATIVE reloc has been created
3553 /* For non-shared objects explicit GOT slots must be
3554 filled with the PLT slot address for pointer
3555 equality reasons. */
3556 bfd_put_64 (output_bfd, (htab->elf.iplt->output_section->vma
3557 + htab->elf.iplt->output_offset
3559 htab->elf.sgot->contents + h->got.offset);
3563 else if (bfd_link_pic (info)
3564 && SYMBOL_REFERENCES_LOCAL (info, h))
3566 /* If this is a static link, or it is a -Bsymbolic link and
3567 the symbol is defined locally or was forced to be local
3568 because of a version file, we just want to emit a
3569 RELATIVE reloc. The entry in the global offset table
3570 will already have been initialized in the
3571 relocate_section function. */
3572 if (!h->def_regular)
3574 BFD_ASSERT((h->got.offset & 1) != 0);
3575 rela.r_info = ELF64_R_INFO (0, R_390_RELATIVE);
3576 rela.r_addend = (h->root.u.def.value
3577 + h->root.u.def.section->output_section->vma
3578 + h->root.u.def.section->output_offset);
3582 BFD_ASSERT((h->got.offset & 1) == 0);
3584 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgot->contents + h->got.offset);
3585 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_GLOB_DAT);
3589 loc = htab->elf.srelgot->contents;
3590 loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf64_External_Rela);
3591 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3596 Elf_Internal_Rela rela;
3600 /* This symbols needs a copy reloc. Set it up. */
3602 if (h->dynindx == -1
3603 || (h->root.type != bfd_link_hash_defined
3604 && h->root.type != bfd_link_hash_defweak)
3605 || htab->elf.srelbss == NULL)
3608 rela.r_offset = (h->root.u.def.value
3609 + h->root.u.def.section->output_section->vma
3610 + h->root.u.def.section->output_offset);
3611 rela.r_info = ELF64_R_INFO (h->dynindx, R_390_COPY);
3613 if ((h->root.u.def.section->flags & SEC_READONLY) != 0)
3614 s = htab->elf.sreldynrelro;
3616 s = htab->elf.srelbss;
3617 loc = s->contents + s->reloc_count++ * sizeof (Elf64_External_Rela);
3618 bfd_elf64_swap_reloca_out (output_bfd, &rela, loc);
3621 /* Mark some specially defined symbols as absolute. */
3622 if (h == htab->elf.hdynamic
3623 || h == htab->elf.hgot
3624 || h == htab->elf.hplt)
3625 sym->st_shndx = SHN_ABS;
3630 /* Used to decide how to sort relocs in an optimal manner for the
3631 dynamic linker, before writing them out. */
3633 static enum elf_reloc_type_class
3634 elf_s390_reloc_type_class (const struct bfd_link_info *info ATTRIBUTE_UNUSED,
3635 const asection *rel_sec ATTRIBUTE_UNUSED,
3636 const Elf_Internal_Rela *rela)
3638 bfd *abfd = info->output_bfd;
3639 const struct elf_backend_data *bed = get_elf_backend_data (abfd);
3640 struct elf_s390_link_hash_table *htab = elf_s390_hash_table (info);
3641 unsigned long r_symndx = ELF64_R_SYM (rela->r_info);
3642 Elf_Internal_Sym sym;
3644 if (htab->elf.dynsym == NULL
3645 || !bed->s->swap_symbol_in (abfd,
3646 (htab->elf.dynsym->contents
3647 + r_symndx * bed->s->sizeof_sym),
3651 /* Check relocation against STT_GNU_IFUNC symbol. */
3652 if (ELF_ST_TYPE (sym.st_info) == STT_GNU_IFUNC)
3653 return reloc_class_ifunc;
3655 switch ((int) ELF64_R_TYPE (rela->r_info))
3657 case R_390_RELATIVE:
3658 return reloc_class_relative;
3659 case R_390_JMP_SLOT:
3660 return reloc_class_plt;
3662 return reloc_class_copy;
3664 return reloc_class_normal;
3668 /* Finish up the dynamic sections. */
3671 elf_s390_finish_dynamic_sections (bfd *output_bfd,
3672 struct bfd_link_info *info)
3674 struct elf_s390_link_hash_table *htab;
3680 htab = elf_s390_hash_table (info);
3684 dynobj = htab->elf.dynobj;
3685 sdyn = bfd_get_linker_section (dynobj, ".dynamic");
3687 if (htab->elf.dynamic_sections_created)
3689 Elf64_External_Dyn *dyncon, *dynconend;
3691 if (sdyn == NULL || htab->elf.sgot == NULL)
3694 dyncon = (Elf64_External_Dyn *) sdyn->contents;
3695 dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size);
3696 for (; dyncon < dynconend; dyncon++)
3698 Elf_Internal_Dyn dyn;
3701 bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn);
3709 s = htab->elf.sgotplt;
3710 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3714 s = htab->elf.srelplt;
3715 dyn.d_un.d_ptr = s->output_section->vma + s->output_offset;
3719 dyn.d_un.d_val = htab->elf.srelplt->size + htab->elf.irelplt->size;
3723 /* The procedure linkage table relocs (DT_JMPREL) should
3724 not be included in the overall relocs (DT_RELA).
3725 Therefore, we override the DT_RELASZ entry here to
3726 make it not include the JMPREL relocs. Since the
3727 linker script arranges for .rela.plt to follow all
3728 other relocation sections, we don't have to worry
3729 about changing the DT_RELA entry. */
3730 dyn.d_un.d_val -= htab->elf.srelplt->size + htab->elf.irelplt->size;
3734 bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon);
3737 /* Fill in the special first entry in the procedure linkage table. */
3738 if (htab->elf.splt && htab->elf.splt->size > 0)
3740 /* fill in blueprint for plt 0 entry */
3741 memcpy (htab->elf.splt->contents, elf_s390x_first_plt_entry,
3742 PLT_FIRST_ENTRY_SIZE);
3743 /* Fixup relative address to start of GOT */
3744 bfd_put_32 (output_bfd,
3745 (htab->elf.sgotplt->output_section->vma
3746 + htab->elf.sgotplt->output_offset
3747 - htab->elf.splt->output_section->vma
3748 - htab->elf.splt->output_offset - 6)/2,
3749 htab->elf.splt->contents + 8);
3751 if (elf_section_data (htab->elf.splt->output_section) != NULL)
3752 elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize
3756 if (htab->elf.sgotplt)
3758 /* Fill in the first three entries in the global offset table. */
3759 if (htab->elf.sgotplt->size > 0)
3761 bfd_put_64 (output_bfd,
3762 (sdyn == NULL ? (bfd_vma) 0
3763 : sdyn->output_section->vma + sdyn->output_offset),
3764 htab->elf.sgotplt->contents);
3765 /* One entry for shared object struct ptr. */
3766 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 8);
3767 /* One entry for _dl_runtime_resolve. */
3768 bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + 16);
3771 elf_section_data (htab->elf.sgot->output_section)
3772 ->this_hdr.sh_entsize = 8;
3775 /* Finish dynamic symbol for local IFUNC symbols. */
3776 for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link.next)
3778 struct plt_entry *local_plt;
3779 Elf_Internal_Sym *isym;
3780 Elf_Internal_Shdr *symtab_hdr;
3782 symtab_hdr = &elf_symtab_hdr (ibfd);
3784 local_plt = elf_s390_local_plt (ibfd);
3785 if (local_plt != NULL)
3786 for (i = 0; i < symtab_hdr->sh_info; i++)
3788 if (local_plt[i].plt.offset != (bfd_vma) -1)
3790 asection *sec = local_plt[i].sec;
3791 isym = bfd_sym_from_r_symndx (&htab->sym_cache, ibfd, i);
3795 if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC)
3796 elf_s390_finish_ifunc_symbol (output_bfd, info, NULL, htab,
3797 local_plt[i].plt.offset,
3799 + sec->output_section->vma
3800 + sec->output_offset);
3809 /* Support for core dump NOTE sections. */
3812 elf_s390_grok_prstatus (bfd *abfd, Elf_Internal_Note *note)
3817 switch (note->descsz)
3822 case 336: /* sizeof(struct elf_prstatus) on s390x */
3824 elf_tdata (abfd)->core->signal = bfd_get_16 (abfd, note->descdata + 12);
3827 elf_tdata (abfd)->core->lwpid = bfd_get_32 (abfd, note->descdata + 32);
3835 /* Make a ".reg/999" section. */
3836 return _bfd_elfcore_make_pseudosection (abfd, ".reg",
3837 size, note->descpos + offset);
3841 elf_s390_grok_psinfo (bfd *abfd, Elf_Internal_Note *note)
3843 switch (note->descsz)
3848 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3849 elf_tdata (abfd)->core->pid
3850 = bfd_get_32 (abfd, note->descdata + 24);
3851 elf_tdata (abfd)->core->program
3852 = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16);
3853 elf_tdata (abfd)->core->command
3854 = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80);
3857 /* Note that for some reason, a spurious space is tacked
3858 onto the end of the args in some (at least one anyway)
3859 implementations, so strip it off if it exists. */
3862 char *command = elf_tdata (abfd)->core->command;
3863 int n = strlen (command);
3865 if (0 < n && command[n - 1] == ' ')
3866 command[n - 1] = '\0';
3873 elf_s390_write_core_note (bfd *abfd, char *buf, int *bufsiz,
3885 char data[136] = { 0 };
3886 const char *fname, *psargs;
3888 va_start (ap, note_type);
3889 fname = va_arg (ap, const char *);
3890 psargs = va_arg (ap, const char *);
3893 strncpy (data + 40, fname, 16);
3894 strncpy (data + 56, psargs, 80);
3895 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3896 &data, sizeof (data));
3901 char data[336] = { 0 };
3906 va_start (ap, note_type);
3907 pid = va_arg (ap, long);
3908 cursig = va_arg (ap, int);
3909 gregs = va_arg (ap, const void *);
3912 bfd_put_16 (abfd, cursig, data + 12);
3913 bfd_put_32 (abfd, pid, data + 32);
3914 memcpy (data + 112, gregs, 216);
3915 return elfcore_write_note (abfd, buf, bufsiz, "CORE", note_type,
3916 &data, sizeof (data));
3922 /* Return address for Ith PLT stub in section PLT, for relocation REL
3923 or (bfd_vma) -1 if it should not be included. */
3926 elf_s390_plt_sym_val (bfd_vma i, const asection *plt,
3927 const arelent *rel ATTRIBUTE_UNUSED)
3929 return plt->vma + PLT_FIRST_ENTRY_SIZE + i * PLT_ENTRY_SIZE;
3932 /* Merge backend specific data from an object file to the output
3933 object file when linking. */
3936 elf64_s390_merge_private_bfd_data (bfd *ibfd, struct bfd_link_info *info)
3938 if (!is_s390_elf (ibfd) || !is_s390_elf (info->output_bfd))
3941 return elf_s390_merge_obj_attributes (ibfd, info);
3944 /* Why was the hash table entry size definition changed from
3945 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3946 this is the only reason for the s390_elf64_size_info structure. */
3948 const struct elf_size_info s390_elf64_size_info =
3950 sizeof (Elf64_External_Ehdr),
3951 sizeof (Elf64_External_Phdr),
3952 sizeof (Elf64_External_Shdr),
3953 sizeof (Elf64_External_Rel),
3954 sizeof (Elf64_External_Rela),
3955 sizeof (Elf64_External_Sym),
3956 sizeof (Elf64_External_Dyn),
3957 sizeof (Elf_External_Note),
3958 8, /* hash-table entry size. */
3959 1, /* internal relocations per external relocations. */
3960 64, /* arch_size. */
3961 3, /* log_file_align. */
3962 ELFCLASS64, EV_CURRENT,
3963 bfd_elf64_write_out_phdrs,
3964 bfd_elf64_write_shdrs_and_ehdr,
3965 bfd_elf64_checksum_contents,
3966 bfd_elf64_write_relocs,
3967 bfd_elf64_swap_symbol_in,
3968 bfd_elf64_swap_symbol_out,
3969 bfd_elf64_slurp_reloc_table,
3970 bfd_elf64_slurp_symbol_table,
3971 bfd_elf64_swap_dyn_in,
3972 bfd_elf64_swap_dyn_out,
3973 bfd_elf64_swap_reloc_in,
3974 bfd_elf64_swap_reloc_out,
3975 bfd_elf64_swap_reloca_in,
3976 bfd_elf64_swap_reloca_out
3979 #define TARGET_BIG_SYM s390_elf64_vec
3980 #define TARGET_BIG_NAME "elf64-s390"
3981 #define ELF_ARCH bfd_arch_s390
3982 #define ELF_TARGET_ID S390_ELF_DATA
3983 #define ELF_MACHINE_CODE EM_S390
3984 #define ELF_MACHINE_ALT1 EM_S390_OLD
3985 #define ELF_MAXPAGESIZE 0x1000
3987 #define elf_backend_size_info s390_elf64_size_info
3989 #define elf_backend_can_gc_sections 1
3990 #define elf_backend_can_refcount 1
3991 #define elf_backend_want_got_plt 1
3992 #define elf_backend_plt_readonly 1
3993 #define elf_backend_want_plt_sym 0
3994 #define elf_backend_got_header_size 24
3995 #define elf_backend_want_dynrelro 1
3996 #define elf_backend_rela_normal 1
3998 #define elf_info_to_howto elf_s390_info_to_howto
4000 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
4001 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
4002 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
4003 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
4004 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
4006 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
4007 #define elf_backend_check_relocs elf_s390_check_relocs
4008 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4009 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4010 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4011 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4012 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4013 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
4014 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4015 #define elf_backend_relocate_section elf_s390_relocate_section
4016 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4017 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4018 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4019 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4020 #define elf_backend_write_core_note elf_s390_write_core_note
4021 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4022 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
4023 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4025 #define bfd_elf64_mkobject elf_s390_mkobject
4026 #define elf_backend_object_p elf_s390_object_p
4028 #include "elf64-target.h"