1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2022 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd
*, arelent
*, asymbol
*, void *,
37 asection
*, bfd
*, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd
*, arelent
*, asymbol
*, void *,
40 asection
*, bfd
*, char **);
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table
[] =
45 HOWTO (R_390_NONE
, /* type */
49 false, /* pc_relative */
51 complain_overflow_dont
, /* complain_on_overflow */
52 bfd_elf_generic_reloc
, /* special_function */
53 "R_390_NONE", /* name */
54 false, /* partial_inplace */
57 false), /* pcrel_offset */
59 HOWTO(R_390_8
, 0, 1, 8, false, 0, complain_overflow_bitfield
,
60 bfd_elf_generic_reloc
, "R_390_8", false, 0,0x000000ff, false),
61 HOWTO(R_390_12
, 0, 2, 12, false, 0, complain_overflow_dont
,
62 bfd_elf_generic_reloc
, "R_390_12", false, 0,0x00000fff, false),
63 HOWTO(R_390_16
, 0, 2, 16, false, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_390_16", false, 0,0x0000ffff, false),
65 HOWTO(R_390_32
, 0, 4, 32, false, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_390_32", false, 0,0xffffffff, false),
67 HOWTO(R_390_PC32
, 0, 4, 32, true, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_390_PC32", false, 0,0xffffffff, true),
69 HOWTO(R_390_GOT12
, 0, 2, 12, false, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_390_GOT12", false, 0,0x00000fff, false),
71 HOWTO(R_390_GOT32
, 0, 4, 32, false, 0, complain_overflow_bitfield
,
72 bfd_elf_generic_reloc
, "R_390_GOT32", false, 0,0xffffffff, false),
73 HOWTO(R_390_PLT32
, 0, 4, 32, true, 0, complain_overflow_bitfield
,
74 bfd_elf_generic_reloc
, "R_390_PLT32", false, 0,0xffffffff, true),
75 HOWTO(R_390_COPY
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
76 bfd_elf_generic_reloc
, "R_390_COPY", false, 0,MINUS_ONE
, false),
77 HOWTO(R_390_GLOB_DAT
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
78 bfd_elf_generic_reloc
, "R_390_GLOB_DAT", false, 0,MINUS_ONE
, false),
79 HOWTO(R_390_JMP_SLOT
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
80 bfd_elf_generic_reloc
, "R_390_JMP_SLOT", false, 0,MINUS_ONE
, false),
81 HOWTO(R_390_RELATIVE
, 0, 8, 64, true, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_390_RELATIVE", false, 0,MINUS_ONE
, false),
83 HOWTO(R_390_GOTOFF32
, 0, 4, 32, false, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_390_GOTOFF32", false, 0,MINUS_ONE
, false),
85 HOWTO(R_390_GOTPC
, 0, 8, 64, true, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_390_GOTPC", false, 0,MINUS_ONE
, true),
87 HOWTO(R_390_GOT16
, 0, 2, 16, false, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_390_GOT16", false, 0,0x0000ffff, false),
89 HOWTO(R_390_PC16
, 0, 2, 16, true, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_390_PC16", false, 0,0x0000ffff, true),
91 HOWTO(R_390_PC16DBL
, 1, 2, 16, true, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_390_PC16DBL", false, 0,0x0000ffff, true),
93 HOWTO(R_390_PLT16DBL
, 1, 2, 16, true, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_390_PLT16DBL", false, 0,0x0000ffff, true),
95 HOWTO(R_390_PC32DBL
, 1, 4, 32, true, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_390_PC32DBL", false, 0,0xffffffff, true),
97 HOWTO(R_390_PLT32DBL
, 1, 4, 32, true, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_390_PLT32DBL", false, 0,0xffffffff, true),
99 HOWTO(R_390_GOTPCDBL
, 1, 4, 32, true, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_390_GOTPCDBL", false, 0,MINUS_ONE
, true),
101 HOWTO(R_390_64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_390_64", false, 0,MINUS_ONE
, false),
103 HOWTO(R_390_PC64
, 0, 8, 64, true, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_390_PC64", false, 0,MINUS_ONE
, true),
105 HOWTO(R_390_GOT64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
106 bfd_elf_generic_reloc
, "R_390_GOT64", false, 0,MINUS_ONE
, false),
107 HOWTO(R_390_PLT64
, 0, 8, 64, true, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_390_PLT64", false, 0,MINUS_ONE
, true),
109 HOWTO(R_390_GOTENT
, 1, 4, 32, true, 0, complain_overflow_bitfield
,
110 bfd_elf_generic_reloc
, "R_390_GOTENT", false, 0,MINUS_ONE
, true),
111 HOWTO(R_390_GOTOFF16
, 0, 2, 16, false, 0, complain_overflow_bitfield
,
112 bfd_elf_generic_reloc
, "R_390_GOTOFF16", false, 0,0x0000ffff, false),
113 HOWTO(R_390_GOTOFF64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
114 bfd_elf_generic_reloc
, "R_390_GOTOFF64", false, 0,MINUS_ONE
, false),
115 HOWTO(R_390_GOTPLT12
, 0, 2, 12, false, 0, complain_overflow_dont
,
116 bfd_elf_generic_reloc
, "R_390_GOTPLT12", false, 0,0x00000fff, false),
117 HOWTO(R_390_GOTPLT16
, 0, 2, 16, false, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_390_GOTPLT16", false, 0,0x0000ffff, false),
119 HOWTO(R_390_GOTPLT32
, 0, 4, 32, false, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_390_GOTPLT32", false, 0,0xffffffff, false),
121 HOWTO(R_390_GOTPLT64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_390_GOTPLT64", false, 0,MINUS_ONE
, false),
123 HOWTO(R_390_GOTPLTENT
, 1, 4, 32, true, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_390_GOTPLTENT",false, 0,MINUS_ONE
, true),
125 HOWTO(R_390_PLTOFF16
, 0, 2, 16, false, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_390_PLTOFF16", false, 0,0x0000ffff, false),
127 HOWTO(R_390_PLTOFF32
, 0, 4, 32, false, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_390_PLTOFF32", false, 0,0xffffffff, false),
129 HOWTO(R_390_PLTOFF64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
130 bfd_elf_generic_reloc
, "R_390_PLTOFF64", false, 0,MINUS_ONE
, false),
131 HOWTO(R_390_TLS_LOAD
, 0, 0, 0, false, 0, complain_overflow_dont
,
132 s390_tls_reloc
, "R_390_TLS_LOAD", false, 0, 0, false),
133 HOWTO(R_390_TLS_GDCALL
, 0, 0, 0, false, 0, complain_overflow_dont
,
134 s390_tls_reloc
, "R_390_TLS_GDCALL", false, 0, 0, false),
135 HOWTO(R_390_TLS_LDCALL
, 0, 0, 0, false, 0, complain_overflow_dont
,
136 s390_tls_reloc
, "R_390_TLS_LDCALL", false, 0, 0, false),
137 EMPTY_HOWTO (R_390_TLS_GD32
), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
139 bfd_elf_generic_reloc
, "R_390_TLS_GD64", false, 0, MINUS_ONE
, false),
140 HOWTO(R_390_TLS_GOTIE12
, 0, 2, 12, false, 0, complain_overflow_dont
,
141 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE12", false, 0, 0x00000fff, false),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32
), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE64", false, 0, MINUS_ONE
, false),
145 EMPTY_HOWTO (R_390_TLS_LDM32
), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
147 bfd_elf_generic_reloc
, "R_390_TLS_LDM64", false, 0, MINUS_ONE
, false),
148 EMPTY_HOWTO (R_390_TLS_IE32
), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
150 bfd_elf_generic_reloc
, "R_390_TLS_IE64", false, 0, MINUS_ONE
, false),
151 HOWTO(R_390_TLS_IEENT
, 1, 4, 32, true, 0, complain_overflow_bitfield
,
152 bfd_elf_generic_reloc
, "R_390_TLS_IEENT", false, 0, MINUS_ONE
, true),
153 EMPTY_HOWTO (R_390_TLS_LE32
), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64
, 0, 4, 32, false, 0, complain_overflow_bitfield
,
155 bfd_elf_generic_reloc
, "R_390_TLS_LE64", false, 0, MINUS_ONE
, false),
156 EMPTY_HOWTO (R_390_TLS_LDO32
), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
158 bfd_elf_generic_reloc
, "R_390_TLS_LDO64", false, 0, MINUS_ONE
, false),
159 HOWTO(R_390_TLS_DTPMOD
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
160 bfd_elf_generic_reloc
, "R_390_TLS_DTPMOD", false, 0, MINUS_ONE
, false),
161 HOWTO(R_390_TLS_DTPOFF
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
162 bfd_elf_generic_reloc
, "R_390_TLS_DTPOFF", false, 0, MINUS_ONE
, false),
163 HOWTO(R_390_TLS_TPOFF
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
164 bfd_elf_generic_reloc
, "R_390_TLS_TPOFF", false, 0, MINUS_ONE
, false),
165 HOWTO(R_390_20
, 0, 4, 20, false, 8, complain_overflow_dont
,
166 s390_elf_ldisp_reloc
, "R_390_20", false, 0,0x0fffff00, false),
167 HOWTO(R_390_GOT20
, 0, 4, 20, false, 8, complain_overflow_dont
,
168 s390_elf_ldisp_reloc
, "R_390_GOT20", false, 0,0x0fffff00, false),
169 HOWTO(R_390_GOTPLT20
, 0, 4, 20, false, 8, complain_overflow_dont
,
170 s390_elf_ldisp_reloc
, "R_390_GOTPLT20", false, 0,0x0fffff00, false),
171 HOWTO(R_390_TLS_GOTIE20
, 0, 4, 20, false, 8, complain_overflow_dont
,
172 s390_elf_ldisp_reloc
, "R_390_TLS_GOTIE20", false, 0,0x0fffff00, false),
173 HOWTO(R_390_IRELATIVE
, 0, 8, 64, false, 0, complain_overflow_bitfield
,
174 bfd_elf_generic_reloc
, "R_390_IRELATIVE", false, 0, MINUS_ONE
, false),
175 HOWTO(R_390_PC12DBL
, 1, 2, 12, true, 0, complain_overflow_bitfield
,
176 bfd_elf_generic_reloc
, "R_390_PC12DBL", false, 0,0x00000fff, true),
177 HOWTO(R_390_PLT12DBL
, 1, 2, 12, true, 0, complain_overflow_bitfield
,
178 bfd_elf_generic_reloc
, "R_390_PLT12DBL", false, 0,0x00000fff, true),
179 HOWTO(R_390_PC24DBL
, 1, 4, 24, true, 0, complain_overflow_bitfield
,
180 bfd_elf_generic_reloc
, "R_390_PC24DBL", false, 0,0x00ffffff, true),
181 HOWTO(R_390_PLT24DBL
, 1, 4, 24, true, 0, complain_overflow_bitfield
,
182 bfd_elf_generic_reloc
, "R_390_PLT24DBL", false, 0,0x00ffffff, true),
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto
=
187 HOWTO (R_390_GNU_VTINHERIT
, 0,8,0,false,0,complain_overflow_dont
, NULL
, "R_390_GNU_VTINHERIT", false,0, 0, false);
188 static reloc_howto_type elf64_s390_vtentry_howto
=
189 HOWTO (R_390_GNU_VTENTRY
, 0,8,0,false,0,complain_overflow_dont
, _bfd_elf_rel_vtable_reloc_fn
,"R_390_GNU_VTENTRY", false,0,0, false);
191 static reloc_howto_type
*
192 elf_s390_reloc_type_lookup (bfd
*abfd
,
193 bfd_reloc_code_real_type code
)
198 return &elf_howto_table
[(int) R_390_NONE
];
200 return &elf_howto_table
[(int) R_390_8
];
201 case BFD_RELOC_390_12
:
202 return &elf_howto_table
[(int) R_390_12
];
204 return &elf_howto_table
[(int) R_390_16
];
206 return &elf_howto_table
[(int) R_390_32
];
208 return &elf_howto_table
[(int) R_390_32
];
209 case BFD_RELOC_32_PCREL
:
210 return &elf_howto_table
[(int) R_390_PC32
];
211 case BFD_RELOC_390_GOT12
:
212 return &elf_howto_table
[(int) R_390_GOT12
];
213 case BFD_RELOC_32_GOT_PCREL
:
214 return &elf_howto_table
[(int) R_390_GOT32
];
215 case BFD_RELOC_390_PLT32
:
216 return &elf_howto_table
[(int) R_390_PLT32
];
217 case BFD_RELOC_390_COPY
:
218 return &elf_howto_table
[(int) R_390_COPY
];
219 case BFD_RELOC_390_GLOB_DAT
:
220 return &elf_howto_table
[(int) R_390_GLOB_DAT
];
221 case BFD_RELOC_390_JMP_SLOT
:
222 return &elf_howto_table
[(int) R_390_JMP_SLOT
];
223 case BFD_RELOC_390_RELATIVE
:
224 return &elf_howto_table
[(int) R_390_RELATIVE
];
225 case BFD_RELOC_32_GOTOFF
:
226 return &elf_howto_table
[(int) R_390_GOTOFF32
];
227 case BFD_RELOC_390_GOTPC
:
228 return &elf_howto_table
[(int) R_390_GOTPC
];
229 case BFD_RELOC_390_GOT16
:
230 return &elf_howto_table
[(int) R_390_GOT16
];
231 case BFD_RELOC_16_PCREL
:
232 return &elf_howto_table
[(int) R_390_PC16
];
233 case BFD_RELOC_390_PC12DBL
:
234 return &elf_howto_table
[(int) R_390_PC12DBL
];
235 case BFD_RELOC_390_PLT12DBL
:
236 return &elf_howto_table
[(int) R_390_PLT12DBL
];
237 case BFD_RELOC_390_PC16DBL
:
238 return &elf_howto_table
[(int) R_390_PC16DBL
];
239 case BFD_RELOC_390_PLT16DBL
:
240 return &elf_howto_table
[(int) R_390_PLT16DBL
];
241 case BFD_RELOC_390_PC24DBL
:
242 return &elf_howto_table
[(int) R_390_PC24DBL
];
243 case BFD_RELOC_390_PLT24DBL
:
244 return &elf_howto_table
[(int) R_390_PLT24DBL
];
245 case BFD_RELOC_390_PC32DBL
:
246 return &elf_howto_table
[(int) R_390_PC32DBL
];
247 case BFD_RELOC_390_PLT32DBL
:
248 return &elf_howto_table
[(int) R_390_PLT32DBL
];
249 case BFD_RELOC_390_GOTPCDBL
:
250 return &elf_howto_table
[(int) R_390_GOTPCDBL
];
252 return &elf_howto_table
[(int) R_390_64
];
253 case BFD_RELOC_64_PCREL
:
254 return &elf_howto_table
[(int) R_390_PC64
];
255 case BFD_RELOC_390_GOT64
:
256 return &elf_howto_table
[(int) R_390_GOT64
];
257 case BFD_RELOC_390_PLT64
:
258 return &elf_howto_table
[(int) R_390_PLT64
];
259 case BFD_RELOC_390_GOTENT
:
260 return &elf_howto_table
[(int) R_390_GOTENT
];
261 case BFD_RELOC_16_GOTOFF
:
262 return &elf_howto_table
[(int) R_390_GOTOFF16
];
263 case BFD_RELOC_390_GOTOFF64
:
264 return &elf_howto_table
[(int) R_390_GOTOFF64
];
265 case BFD_RELOC_390_GOTPLT12
:
266 return &elf_howto_table
[(int) R_390_GOTPLT12
];
267 case BFD_RELOC_390_GOTPLT16
:
268 return &elf_howto_table
[(int) R_390_GOTPLT16
];
269 case BFD_RELOC_390_GOTPLT32
:
270 return &elf_howto_table
[(int) R_390_GOTPLT32
];
271 case BFD_RELOC_390_GOTPLT64
:
272 return &elf_howto_table
[(int) R_390_GOTPLT64
];
273 case BFD_RELOC_390_GOTPLTENT
:
274 return &elf_howto_table
[(int) R_390_GOTPLTENT
];
275 case BFD_RELOC_390_PLTOFF16
:
276 return &elf_howto_table
[(int) R_390_PLTOFF16
];
277 case BFD_RELOC_390_PLTOFF32
:
278 return &elf_howto_table
[(int) R_390_PLTOFF32
];
279 case BFD_RELOC_390_PLTOFF64
:
280 return &elf_howto_table
[(int) R_390_PLTOFF64
];
281 case BFD_RELOC_390_TLS_LOAD
:
282 return &elf_howto_table
[(int) R_390_TLS_LOAD
];
283 case BFD_RELOC_390_TLS_GDCALL
:
284 return &elf_howto_table
[(int) R_390_TLS_GDCALL
];
285 case BFD_RELOC_390_TLS_LDCALL
:
286 return &elf_howto_table
[(int) R_390_TLS_LDCALL
];
287 case BFD_RELOC_390_TLS_GD64
:
288 return &elf_howto_table
[(int) R_390_TLS_GD64
];
289 case BFD_RELOC_390_TLS_GOTIE12
:
290 return &elf_howto_table
[(int) R_390_TLS_GOTIE12
];
291 case BFD_RELOC_390_TLS_GOTIE64
:
292 return &elf_howto_table
[(int) R_390_TLS_GOTIE64
];
293 case BFD_RELOC_390_TLS_LDM64
:
294 return &elf_howto_table
[(int) R_390_TLS_LDM64
];
295 case BFD_RELOC_390_TLS_IE64
:
296 return &elf_howto_table
[(int) R_390_TLS_IE64
];
297 case BFD_RELOC_390_TLS_IEENT
:
298 return &elf_howto_table
[(int) R_390_TLS_IEENT
];
299 case BFD_RELOC_390_TLS_LE64
:
300 return &elf_howto_table
[(int) R_390_TLS_LE64
];
301 case BFD_RELOC_390_TLS_LDO64
:
302 return &elf_howto_table
[(int) R_390_TLS_LDO64
];
303 case BFD_RELOC_390_TLS_DTPMOD
:
304 return &elf_howto_table
[(int) R_390_TLS_DTPMOD
];
305 case BFD_RELOC_390_TLS_DTPOFF
:
306 return &elf_howto_table
[(int) R_390_TLS_DTPOFF
];
307 case BFD_RELOC_390_TLS_TPOFF
:
308 return &elf_howto_table
[(int) R_390_TLS_TPOFF
];
309 case BFD_RELOC_390_20
:
310 return &elf_howto_table
[(int) R_390_20
];
311 case BFD_RELOC_390_GOT20
:
312 return &elf_howto_table
[(int) R_390_GOT20
];
313 case BFD_RELOC_390_GOTPLT20
:
314 return &elf_howto_table
[(int) R_390_GOTPLT20
];
315 case BFD_RELOC_390_TLS_GOTIE20
:
316 return &elf_howto_table
[(int) R_390_TLS_GOTIE20
];
317 case BFD_RELOC_390_IRELATIVE
:
318 return &elf_howto_table
[(int) R_390_IRELATIVE
];
319 case BFD_RELOC_VTABLE_INHERIT
:
320 return &elf64_s390_vtinherit_howto
;
321 case BFD_RELOC_VTABLE_ENTRY
:
322 return &elf64_s390_vtentry_howto
;
327 /* xgettext:c-format */
328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd
, (int) code
);
329 bfd_set_error (bfd_error_bad_value
);
333 static reloc_howto_type
*
334 elf_s390_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
340 i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]);
342 if (elf_howto_table
[i
].name
!= NULL
343 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
344 return &elf_howto_table
[i
];
346 if (strcasecmp (elf64_s390_vtinherit_howto
.name
, r_name
) == 0)
347 return &elf64_s390_vtinherit_howto
;
348 if (strcasecmp (elf64_s390_vtentry_howto
.name
, r_name
) == 0)
349 return &elf64_s390_vtentry_howto
;
354 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
358 elf_s390_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
360 Elf_Internal_Rela
*dst
)
362 unsigned int r_type
= ELF64_R_TYPE(dst
->r_info
);
366 case R_390_GNU_VTINHERIT
:
367 cache_ptr
->howto
= &elf64_s390_vtinherit_howto
;
370 case R_390_GNU_VTENTRY
:
371 cache_ptr
->howto
= &elf64_s390_vtentry_howto
;
375 if (r_type
>= sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]))
377 /* xgettext:c-format */
378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
380 bfd_set_error (bfd_error_bad_value
);
383 cache_ptr
->howto
= &elf_howto_table
[r_type
];
388 /* A relocation function which doesn't do anything. */
389 static bfd_reloc_status_type
390 s390_tls_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
391 arelent
*reloc_entry
,
392 asymbol
*symbol ATTRIBUTE_UNUSED
,
393 void * data ATTRIBUTE_UNUSED
,
394 asection
*input_section
,
396 char **error_message ATTRIBUTE_UNUSED
)
399 reloc_entry
->address
+= input_section
->output_offset
;
403 /* Handle the large displacement relocs. */
404 static bfd_reloc_status_type
405 s390_elf_ldisp_reloc (bfd
*abfd
,
406 arelent
*reloc_entry
,
409 asection
*input_section
,
411 char **error_message ATTRIBUTE_UNUSED
)
413 reloc_howto_type
*howto
= reloc_entry
->howto
;
417 if (output_bfd
!= (bfd
*) NULL
418 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
419 && (! howto
->partial_inplace
420 || reloc_entry
->addend
== 0))
422 reloc_entry
->address
+= input_section
->output_offset
;
425 if (output_bfd
!= NULL
)
426 return bfd_reloc_continue
;
428 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
429 return bfd_reloc_outofrange
;
431 relocation
= (symbol
->value
432 + symbol
->section
->output_section
->vma
433 + symbol
->section
->output_offset
);
434 relocation
+= reloc_entry
->addend
;
435 if (howto
->pc_relative
)
437 relocation
-= (input_section
->output_section
->vma
438 + input_section
->output_offset
);
439 relocation
-= reloc_entry
->address
;
442 insn
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ reloc_entry
->address
);
443 insn
|= (relocation
& 0xfff) << 16 | (relocation
& 0xff000) >> 4;
444 bfd_put_32 (abfd
, insn
, (bfd_byte
*) data
+ reloc_entry
->address
);
446 if ((bfd_signed_vma
) relocation
< - 0x80000
447 || (bfd_signed_vma
) relocation
> 0x7ffff)
448 return bfd_reloc_overflow
;
454 elf_s390_is_local_label_name (bfd
*abfd
, const char *name
)
456 if (name
[0] == '.' && (name
[1] == 'X' || name
[1] == 'L'))
459 return _bfd_elf_is_local_label_name (abfd
, name
);
462 /* Functions for the 390 ELF linker. */
464 /* The name of the dynamic interpreter. This is put in the .interp
467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
473 #define ELIMINATE_COPY_RELOCS 1
475 /* The size in bytes of the first entry in the procedure linkage table. */
476 #define PLT_FIRST_ENTRY_SIZE 32
477 /* The size in bytes of an entry in the procedure linkage table. */
478 #define PLT_ENTRY_SIZE 32
480 #define GOT_ENTRY_SIZE 8
482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
484 /* The first three entries in a global offset table are reserved,
485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
489 /* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
494 Furthermore, only r 0 and 1 are free to use!!! */
496 /* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
501 The code for PLT entries looks like this:
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
507 The loader must then find the module where the function is
508 and insert the address in the GOT.
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
516 .long ? # 4 bytes offset into .rela.plt
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
521 Fixup at offset 28: 32 bit offset into .rela.plt
523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
529 static const bfd_byte elf_s390x_plt_entry
[PLT_ENTRY_SIZE
] =
531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
540 /* The first PLT entry pushes the offset into the symbol table
541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
544 /* The first entry in the PLT:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
553 Fixup at offset 8: relative address to start of GOT. */
555 static const bfd_byte elf_s390x_first_plt_entry
[PLT_FIRST_ENTRY_SIZE
] =
557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
568 /* s390 ELF linker hash entry. */
570 struct elf_s390_link_hash_entry
572 struct elf_link_hash_entry elf
;
574 /* Number of GOTPLT references for a function. */
575 bfd_signed_vma gotplt_refcount
;
577 #define GOT_UNKNOWN 0
581 #define GOT_TLS_IE_NLT 3
582 unsigned char tls_type
;
584 /* For pointer equality reasons we might need to change the symbol
585 type from STT_GNU_IFUNC to STT_FUNC together with its value and
586 section entry. So after alloc_dynrelocs only these values should
587 be used. In order to check whether a symbol is IFUNC use
588 s390_is_ifunc_symbol_p. */
589 bfd_vma ifunc_resolver_address
;
590 asection
*ifunc_resolver_section
;
593 #define elf_s390_hash_entry(ent) \
594 ((struct elf_s390_link_hash_entry *)(ent))
596 /* This structure represents an entry in the local PLT list needed for
597 local IFUNC symbols. */
600 /* The section of the local symbol.
601 Set in relocate_section and used in finish_dynamic_sections. */
606 bfd_signed_vma refcount
;
611 /* NOTE: Keep this structure in sync with
612 the one declared in elf32-s390.c. */
613 struct elf_s390_obj_tdata
615 struct elf_obj_tdata root
;
617 /* A local PLT is needed for ifunc symbols. */
618 struct plt_entry
*local_plt
;
620 /* TLS type for each local got entry. */
621 char *local_got_tls_type
;
624 #define elf_s390_tdata(abfd) \
625 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
627 #define elf_s390_local_plt(abfd) \
628 (elf_s390_tdata (abfd)->local_plt)
630 #define elf_s390_local_got_tls_type(abfd) \
631 (elf_s390_tdata (abfd)->local_got_tls_type)
633 #define is_s390_elf(bfd) \
634 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
635 && elf_tdata (bfd) != NULL \
636 && elf_object_id (bfd) == S390_ELF_DATA)
639 elf_s390_mkobject (bfd
*abfd
)
641 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_s390_obj_tdata
),
646 elf_s390_object_p (bfd
*abfd
)
648 /* Set the right machine number for an s390 elf32 file. */
649 return bfd_default_set_arch_mach (abfd
, bfd_arch_s390
, bfd_mach_s390_64
);
652 /* s390 ELF linker hash table. */
654 struct elf_s390_link_hash_table
656 struct elf_link_hash_table elf
;
658 /* Short-cuts to get to dynamic linker sections. */
662 bfd_signed_vma refcount
;
666 /* Options passed from the linker. */
667 struct s390_elf_params
*params
;
670 /* Get the s390 ELF linker hash table from a link_info structure. */
672 #define elf_s390_hash_table(p) \
673 ((is_elf_hash_table ((p)->hash) \
674 && elf_hash_table_id (elf_hash_table (p)) == S390_ELF_DATA) \
675 ? (struct elf_s390_link_hash_table *) (p)->hash : NULL)
678 #include "elf-s390-common.c"
680 /* Create an entry in an s390 ELF linker hash table. */
682 static struct bfd_hash_entry
*
683 link_hash_newfunc (struct bfd_hash_entry
*entry
,
684 struct bfd_hash_table
*table
,
687 /* Allocate the structure if it has not already been allocated by a
691 entry
= bfd_hash_allocate (table
,
692 sizeof (struct elf_s390_link_hash_entry
));
697 /* Call the allocation method of the superclass. */
698 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
701 struct elf_s390_link_hash_entry
*eh
;
703 eh
= (struct elf_s390_link_hash_entry
*) entry
;
704 eh
->gotplt_refcount
= 0;
705 eh
->tls_type
= GOT_UNKNOWN
;
706 eh
->ifunc_resolver_address
= 0;
707 eh
->ifunc_resolver_section
= NULL
;
713 /* Create an s390 ELF linker hash table. */
715 static struct bfd_link_hash_table
*
716 elf_s390_link_hash_table_create (bfd
*abfd
)
718 struct elf_s390_link_hash_table
*ret
;
719 size_t amt
= sizeof (struct elf_s390_link_hash_table
);
721 ret
= (struct elf_s390_link_hash_table
*) bfd_zmalloc (amt
);
725 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
726 sizeof (struct elf_s390_link_hash_entry
),
733 return &ret
->elf
.root
;
736 /* Copy the extra info we tack onto an elf_link_hash_entry. */
739 elf_s390_copy_indirect_symbol (struct bfd_link_info
*info
,
740 struct elf_link_hash_entry
*dir
,
741 struct elf_link_hash_entry
*ind
)
743 struct elf_s390_link_hash_entry
*edir
, *eind
;
745 edir
= (struct elf_s390_link_hash_entry
*) dir
;
746 eind
= (struct elf_s390_link_hash_entry
*) ind
;
748 if (ind
->root
.type
== bfd_link_hash_indirect
749 && dir
->got
.refcount
<= 0)
751 edir
->tls_type
= eind
->tls_type
;
752 eind
->tls_type
= GOT_UNKNOWN
;
755 if (ELIMINATE_COPY_RELOCS
756 && ind
->root
.type
!= bfd_link_hash_indirect
757 && dir
->dynamic_adjusted
)
759 /* If called to transfer flags for a weakdef during processing
760 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
761 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
762 if (dir
->versioned
!= versioned_hidden
)
763 dir
->ref_dynamic
|= ind
->ref_dynamic
;
764 dir
->ref_regular
|= ind
->ref_regular
;
765 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
766 dir
->needs_plt
|= ind
->needs_plt
;
769 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
773 elf_s390_tls_transition (struct bfd_link_info
*info
,
777 if (bfd_link_dll (info
))
785 return R_390_TLS_LE64
;
786 return R_390_TLS_IE64
;
787 case R_390_TLS_GOTIE64
:
789 return R_390_TLS_LE64
;
790 return R_390_TLS_GOTIE64
;
791 case R_390_TLS_LDM64
:
792 return R_390_TLS_LE64
;
798 /* Look through the relocs for a section during the first phase, and
799 allocate space in the global offset table or procedure linkage
803 elf_s390_check_relocs (bfd
*abfd
,
804 struct bfd_link_info
*info
,
806 const Elf_Internal_Rela
*relocs
)
808 struct elf_s390_link_hash_table
*htab
;
809 Elf_Internal_Shdr
*symtab_hdr
;
810 struct elf_link_hash_entry
**sym_hashes
;
811 const Elf_Internal_Rela
*rel
;
812 const Elf_Internal_Rela
*rel_end
;
814 bfd_signed_vma
*local_got_refcounts
;
815 int tls_type
, old_tls_type
;
817 if (bfd_link_relocatable (info
))
820 BFD_ASSERT (is_s390_elf (abfd
));
822 htab
= elf_s390_hash_table (info
);
826 symtab_hdr
= &elf_symtab_hdr (abfd
);
827 sym_hashes
= elf_sym_hashes (abfd
);
828 local_got_refcounts
= elf_local_got_refcounts (abfd
);
832 rel_end
= relocs
+ sec
->reloc_count
;
833 for (rel
= relocs
; rel
< rel_end
; rel
++)
836 unsigned int r_symndx
;
837 struct elf_link_hash_entry
*h
;
838 Elf_Internal_Sym
*isym
;
840 r_symndx
= ELF64_R_SYM (rel
->r_info
);
842 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
844 /* xgettext:c-format */
845 _bfd_error_handler (_("%pB: bad symbol index: %d"),
850 if (r_symndx
< symtab_hdr
->sh_info
)
852 /* A local symbol. */
853 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
858 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
860 struct plt_entry
*plt
;
862 if (htab
->elf
.dynobj
== NULL
)
863 htab
->elf
.dynobj
= abfd
;
865 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
868 if (local_got_refcounts
== NULL
)
870 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
872 local_got_refcounts
= elf_local_got_refcounts (abfd
);
874 plt
= elf_s390_local_plt (abfd
);
875 plt
[r_symndx
].plt
.refcount
++;
881 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
882 while (h
->root
.type
== bfd_link_hash_indirect
883 || h
->root
.type
== bfd_link_hash_warning
)
884 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
887 /* Create got section and local_got_refcounts array if they
889 r_type
= elf_s390_tls_transition (info
,
890 ELF64_R_TYPE (rel
->r_info
),
905 case R_390_GOTPLTENT
:
907 case R_390_TLS_GOTIE12
:
908 case R_390_TLS_GOTIE20
:
909 case R_390_TLS_GOTIE64
:
910 case R_390_TLS_IEENT
:
912 case R_390_TLS_LDM64
:
914 && local_got_refcounts
== NULL
)
916 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
918 local_got_refcounts
= elf_local_got_refcounts (abfd
);
927 if (htab
->elf
.sgot
== NULL
)
929 if (htab
->elf
.dynobj
== NULL
)
930 htab
->elf
.dynobj
= abfd
;
931 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
938 if (htab
->elf
.dynobj
== NULL
)
939 htab
->elf
.dynobj
= abfd
;
940 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
943 /* Make sure an IFUNC symbol defined in a non-shared object
944 always gets a PLT slot. */
945 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
947 /* The symbol is called by the dynamic loader in order
948 to resolve the relocation. So it is in fact also
959 /* These relocs do not need a GOT slot. They just load the
960 GOT pointer itself or address something else relative to
961 the GOT. Since the GOT pointer has been set up above we
967 if (h
== NULL
|| !s390_is_ifunc_symbol_p (h
) || !h
->def_regular
)
980 /* This symbol requires a procedure linkage table entry. We
981 actually build the entry in adjust_dynamic_symbol,
982 because this might be a case of linking PIC code which is
983 never referenced by a dynamic object, in which case we
984 don't need to generate a procedure linkage table entry
987 /* If this is a local symbol, we resolve it directly without
988 creating a procedure linkage table entry. */
992 h
->plt
.refcount
+= 1;
1000 case R_390_GOTPLT64
:
1001 case R_390_GOTPLTENT
:
1002 /* This symbol requires either a procedure linkage table entry
1003 or an entry in the local got. We actually build the entry
1004 in adjust_dynamic_symbol because whether this is really a
1005 global reference can change and with it the fact if we have
1006 to create a plt entry or a local got entry. To be able to
1007 make a once global symbol a local one we have to keep track
1008 of the number of gotplt references that exist for this
1012 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
++;
1014 h
->plt
.refcount
+= 1;
1017 local_got_refcounts
[r_symndx
] += 1;
1020 case R_390_TLS_LDM64
:
1021 htab
->tls_ldm_got
.refcount
+= 1;
1024 case R_390_TLS_IE64
:
1025 case R_390_TLS_GOTIE12
:
1026 case R_390_TLS_GOTIE20
:
1027 case R_390_TLS_GOTIE64
:
1028 case R_390_TLS_IEENT
:
1029 if (bfd_link_dll (info
))
1030 info
->flags
|= DF_STATIC_TLS
;
1039 case R_390_TLS_GD64
:
1040 /* This symbol requires a global offset table entry. */
1049 tls_type
= GOT_NORMAL
;
1051 case R_390_TLS_GD64
:
1052 tls_type
= GOT_TLS_GD
;
1054 case R_390_TLS_IE64
:
1055 case R_390_TLS_GOTIE64
:
1056 tls_type
= GOT_TLS_IE
;
1058 case R_390_TLS_GOTIE12
:
1059 case R_390_TLS_GOTIE20
:
1060 case R_390_TLS_IEENT
:
1061 tls_type
= GOT_TLS_IE_NLT
;
1067 h
->got
.refcount
+= 1;
1068 old_tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1072 local_got_refcounts
[r_symndx
] += 1;
1073 old_tls_type
= elf_s390_local_got_tls_type (abfd
) [r_symndx
];
1075 /* If a TLS symbol is accessed using IE at least once,
1076 there is no point to use dynamic model for it. */
1077 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
)
1079 if (old_tls_type
== GOT_NORMAL
|| tls_type
== GOT_NORMAL
)
1082 /* xgettext:c-format */
1083 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1084 abfd
, h
->root
.root
.string
);
1087 if (old_tls_type
> tls_type
)
1088 tls_type
= old_tls_type
;
1091 if (old_tls_type
!= tls_type
)
1094 elf_s390_hash_entry (h
)->tls_type
= tls_type
;
1096 elf_s390_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1099 if (r_type
!= R_390_TLS_IE64
)
1103 case R_390_TLS_LE64
:
1104 /* For static linking and executables this reloc will be
1105 calculated at linktime otherwise a TLS_TPOFF runtime
1106 reloc will be generated. */
1107 if (r_type
== R_390_TLS_LE64
&& bfd_link_pie (info
))
1110 if (!bfd_link_dll (info
))
1112 info
->flags
|= DF_STATIC_TLS
;
1126 if (h
!= NULL
&& bfd_link_executable (info
))
1128 /* If this reloc is in a read-only section, we might
1129 need a copy reloc. We can't check reliably at this
1130 stage whether the section is read-only, as input
1131 sections have not yet been mapped to output sections.
1132 Tentatively set the flag for now, and correct in
1133 adjust_dynamic_symbol. */
1136 if (!bfd_link_pic (info
))
1138 /* We may need a .plt entry if the function this reloc
1139 refers to is in a shared lib. */
1140 h
->plt
.refcount
+= 1;
1144 /* If we are creating a shared library, and this is a reloc
1145 against a global symbol, or a non PC relative reloc
1146 against a local symbol, then we need to copy the reloc
1147 into the shared library. However, if we are linking with
1148 -Bsymbolic, we do not need to copy a reloc against a
1149 global symbol which is defined in an object we are
1150 including in the link (i.e., DEF_REGULAR is set). At
1151 this point we have not seen all the input files, so it is
1152 possible that DEF_REGULAR is not set now but will be set
1153 later (it is never cleared). In case of a weak definition,
1154 DEF_REGULAR may be cleared later by a strong definition in
1155 a shared library. We account for that possibility below by
1156 storing information in the relocs_copied field of the hash
1157 table entry. A similar situation occurs when creating
1158 shared libraries and symbol visibility changes render the
1161 If on the other hand, we are creating an executable, we
1162 may need to keep relocations for symbols satisfied by a
1163 dynamic library if we manage to avoid copy relocs for the
1165 if ((bfd_link_pic (info
)
1166 && (sec
->flags
& SEC_ALLOC
) != 0
1167 && ((ELF64_R_TYPE (rel
->r_info
) != R_390_PC16
1168 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC12DBL
1169 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC16DBL
1170 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC24DBL
1171 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32
1172 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32DBL
1173 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC64
)
1175 && (! SYMBOLIC_BIND (info
, h
)
1176 || h
->root
.type
== bfd_link_hash_defweak
1177 || !h
->def_regular
))))
1178 || (ELIMINATE_COPY_RELOCS
1179 && !bfd_link_pic (info
)
1180 && (sec
->flags
& SEC_ALLOC
) != 0
1182 && (h
->root
.type
== bfd_link_hash_defweak
1183 || !h
->def_regular
)))
1185 struct elf_dyn_relocs
*p
;
1186 struct elf_dyn_relocs
**head
;
1188 /* We must copy these reloc types into the output file.
1189 Create a reloc section in dynobj and make room for
1193 if (htab
->elf
.dynobj
== NULL
)
1194 htab
->elf
.dynobj
= abfd
;
1196 sreloc
= _bfd_elf_make_dynamic_reloc_section
1197 (sec
, htab
->elf
.dynobj
, 3, abfd
, /*rela?*/ true);
1203 /* If this is a global symbol, we count the number of
1204 relocations we need for this symbol. */
1207 head
= &h
->dyn_relocs
;
1211 /* Track dynamic relocs needed for local syms too.
1212 We really need local syms available to do this
1217 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
1222 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1226 vpp
= &elf_section_data (s
)->local_dynrel
;
1227 head
= (struct elf_dyn_relocs
**) vpp
;
1231 if (p
== NULL
|| p
->sec
!= sec
)
1233 size_t amt
= sizeof *p
;
1234 p
= ((struct elf_dyn_relocs
*)
1235 bfd_alloc (htab
->elf
.dynobj
, amt
));
1246 if (ELF64_R_TYPE (rel
->r_info
) == R_390_PC16
1247 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC12DBL
1248 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1249 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1250 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32
1251 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32DBL
1252 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC64
)
1257 /* This relocation describes the C++ object vtable hierarchy.
1258 Reconstruct it for later use during GC. */
1259 case R_390_GNU_VTINHERIT
:
1260 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1264 /* This relocation describes which C++ vtable entries are actually
1265 used. Record for later use during GC. */
1266 case R_390_GNU_VTENTRY
:
1267 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1279 /* Return the section that should be marked against GC for a given
1283 elf_s390_gc_mark_hook (asection
*sec
,
1284 struct bfd_link_info
*info
,
1285 Elf_Internal_Rela
*rel
,
1286 struct elf_link_hash_entry
*h
,
1287 Elf_Internal_Sym
*sym
)
1290 switch (ELF64_R_TYPE (rel
->r_info
))
1292 case R_390_GNU_VTINHERIT
:
1293 case R_390_GNU_VTENTRY
:
1297 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1300 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1301 entry but we found we will not create any. Called when we find we will
1302 not have any PLT for this symbol, by for example
1303 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1304 or elf_s390_size_dynamic_sections if no dynamic sections will be
1305 created (we're only linking static objects). */
1308 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry
*h
)
1310 if (h
->elf
.root
.type
== bfd_link_hash_warning
)
1311 h
= (struct elf_s390_link_hash_entry
*) h
->elf
.root
.u
.i
.link
;
1313 if (h
->gotplt_refcount
<= 0)
1316 /* We simply add the number of gotplt references to the number
1317 * of got references for this symbol. */
1318 h
->elf
.got
.refcount
+= h
->gotplt_refcount
;
1319 h
->gotplt_refcount
= -1;
1322 /* Adjust a symbol defined by a dynamic object and referenced by a
1323 regular object. The current definition is in some section of the
1324 dynamic object, but we're not including those sections. We have to
1325 change the definition to something the rest of the link can
1329 elf_s390_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1330 struct elf_link_hash_entry
*h
)
1332 struct elf_s390_link_hash_table
*htab
;
1335 /* STT_GNU_IFUNC symbol must go through PLT. */
1336 if (s390_is_ifunc_symbol_p (h
))
1338 /* All local STT_GNU_IFUNC references must be treated as local
1339 calls via local PLT. */
1340 if (h
->ref_regular
&& SYMBOL_CALLS_LOCAL (info
, h
))
1342 bfd_size_type pc_count
= 0, count
= 0;
1343 struct elf_dyn_relocs
**pp
;
1344 struct elf_dyn_relocs
*p
;
1346 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
; )
1348 pc_count
+= p
->pc_count
;
1349 p
->count
-= p
->pc_count
;
1358 if (pc_count
|| count
)
1362 if (h
->plt
.refcount
<= 0)
1363 h
->plt
.refcount
= 1;
1365 h
->plt
.refcount
+= 1;
1369 if (h
->plt
.refcount
<= 0)
1371 h
->plt
.offset
= (bfd_vma
) -1;
1377 /* If this is a function, put it in the procedure linkage table. We
1378 will fill in the contents of the procedure linkage table later
1379 (although we could actually do it here). */
1380 if (h
->type
== STT_FUNC
1383 if (h
->plt
.refcount
<= 0
1384 || SYMBOL_CALLS_LOCAL (info
, h
)
1385 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1387 /* This case can occur if we saw a PLT32 reloc in an input
1388 file, but the symbol was never referred to by a dynamic
1389 object, or if all references were garbage collected. In
1390 such a case, we don't actually need to build a procedure
1391 linkage table, and we can just do a PC32 reloc instead. */
1392 h
->plt
.offset
= (bfd_vma
) -1;
1394 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1400 /* It's possible that we incorrectly decided a .plt reloc was
1401 needed for an R_390_PC32 reloc to a non-function sym in
1402 check_relocs. We can't decide accurately between function and
1403 non-function syms in check-relocs; Objects loaded later in
1404 the link may change h->type. So fix it now. */
1405 h
->plt
.offset
= (bfd_vma
) -1;
1407 /* If this is a weak symbol, and there is a real definition, the
1408 processor independent code will have arranged for us to see the
1409 real definition first, and we can just use the same value. */
1410 if (h
->is_weakalias
)
1412 struct elf_link_hash_entry
*def
= weakdef (h
);
1413 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
1414 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
1415 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
1416 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1417 h
->non_got_ref
= def
->non_got_ref
;
1421 /* This is a reference to a symbol defined by a dynamic object which
1422 is not a function. */
1424 /* If we are creating a shared library, we must presume that the
1425 only references to the symbol are via the global offset table.
1426 For such cases we need not do anything here; the relocations will
1427 be handled correctly by relocate_section. */
1428 if (bfd_link_pic (info
))
1431 /* If there are no references to this symbol that do not use the
1432 GOT, we don't need to generate a copy reloc. */
1433 if (!h
->non_got_ref
)
1436 /* If -z nocopyreloc was given, we won't generate them either. */
1437 if (info
->nocopyreloc
)
1443 /* If we don't find any dynamic relocs in read-only sections, then
1444 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1445 if (ELIMINATE_COPY_RELOCS
&& !_bfd_elf_readonly_dynrelocs (h
))
1451 /* We must allocate the symbol in our .dynbss section, which will
1452 become part of the .bss section of the executable. There will be
1453 an entry for this symbol in the .dynsym section. The dynamic
1454 object will contain position independent code, so all references
1455 from the dynamic object to this symbol will go through the global
1456 offset table. The dynamic linker will use the .dynsym entry to
1457 determine the address it must put in the global offset table, so
1458 both the dynamic object and the regular object will refer to the
1459 same memory location for the variable. */
1461 htab
= elf_s390_hash_table (info
);
1465 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1466 copy the initial value out of the dynamic object and into the
1467 runtime process image. */
1468 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
1470 s
= htab
->elf
.sdynrelro
;
1471 srel
= htab
->elf
.sreldynrelro
;
1475 s
= htab
->elf
.sdynbss
;
1476 srel
= htab
->elf
.srelbss
;
1478 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1480 srel
->size
+= sizeof (Elf64_External_Rela
);
1484 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
1487 /* Allocate space in .plt, .got and associated reloc sections for
1491 allocate_dynrelocs (struct elf_link_hash_entry
*h
,
1494 struct bfd_link_info
*info
;
1495 struct elf_s390_link_hash_table
*htab
;
1496 struct elf_dyn_relocs
*p
;
1498 if (h
->root
.type
== bfd_link_hash_indirect
)
1501 info
= (struct bfd_link_info
*) inf
;
1502 htab
= elf_s390_hash_table (info
);
1506 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1507 here if it is defined and referenced in a non-shared object. */
1508 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
1509 return s390_elf_allocate_ifunc_dyn_relocs (info
, h
);
1510 else if (htab
->elf
.dynamic_sections_created
1511 && h
->plt
.refcount
> 0)
1513 /* Make sure this symbol is output as a dynamic symbol.
1514 Undefined weak syms won't yet be marked as dynamic. */
1515 if (h
->dynindx
== -1
1516 && !h
->forced_local
)
1518 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1522 if (bfd_link_pic (info
)
1523 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1525 asection
*s
= htab
->elf
.splt
;
1527 /* If this is the first .plt entry, make room for the special
1530 s
->size
+= PLT_FIRST_ENTRY_SIZE
;
1532 h
->plt
.offset
= s
->size
;
1534 /* If this symbol is not defined in a regular file, and we are
1535 not generating a shared library, then set the symbol to this
1536 location in the .plt. This is required to make function
1537 pointers compare as equal between the normal executable and
1538 the shared library. */
1539 if (! bfd_link_pic (info
)
1542 h
->root
.u
.def
.section
= s
;
1543 h
->root
.u
.def
.value
= h
->plt
.offset
;
1546 /* Make room for this entry. */
1547 s
->size
+= PLT_ENTRY_SIZE
;
1549 /* We also need to make an entry in the .got.plt section. */
1550 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
1552 /* We also need to make an entry in the .rela.plt section. */
1553 htab
->elf
.srelplt
->size
+= sizeof (Elf64_External_Rela
);
1557 h
->plt
.offset
= (bfd_vma
) -1;
1559 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1564 h
->plt
.offset
= (bfd_vma
) -1;
1566 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1569 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1570 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1571 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1572 we can save the dynamic TLS relocation. */
1573 if (h
->got
.refcount
> 0
1574 && !bfd_link_dll (info
)
1576 && elf_s390_hash_entry(h
)->tls_type
>= GOT_TLS_IE
)
1578 if (elf_s390_hash_entry(h
)->tls_type
== GOT_TLS_IE_NLT
)
1579 /* For the GOTIE access without a literal pool entry the offset has
1580 to be stored somewhere. The immediate value in the instruction
1581 is not bit enough so the value is stored in the got. */
1583 h
->got
.offset
= htab
->elf
.sgot
->size
;
1584 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
1587 h
->got
.offset
= (bfd_vma
) -1;
1589 else if (h
->got
.refcount
> 0)
1593 int tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1595 /* Make sure this symbol is output as a dynamic symbol.
1596 Undefined weak syms won't yet be marked as dynamic. */
1597 if (h
->dynindx
== -1
1598 && !h
->forced_local
)
1600 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1605 h
->got
.offset
= s
->size
;
1606 s
->size
+= GOT_ENTRY_SIZE
;
1607 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1608 if (tls_type
== GOT_TLS_GD
)
1609 s
->size
+= GOT_ENTRY_SIZE
;
1610 dyn
= htab
->elf
.dynamic_sections_created
;
1611 /* R_390_TLS_IE64 needs one dynamic relocation,
1612 R_390_TLS_GD64 needs one if local symbol and two if global. */
1613 if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1614 || tls_type
>= GOT_TLS_IE
)
1615 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1616 else if (tls_type
== GOT_TLS_GD
)
1617 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf64_External_Rela
);
1618 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
)
1619 && (bfd_link_pic (info
)
1620 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1621 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1624 h
->got
.offset
= (bfd_vma
) -1;
1626 if (h
->dyn_relocs
== NULL
)
1629 /* In the shared -Bsymbolic case, discard space allocated for
1630 dynamic pc-relative relocs against symbols which turn out to be
1631 defined in regular objects. For the normal shared case, discard
1632 space for pc-relative relocs that have become local due to symbol
1633 visibility changes. */
1635 if (bfd_link_pic (info
))
1637 if (SYMBOL_CALLS_LOCAL (info
, h
))
1639 struct elf_dyn_relocs
**pp
;
1641 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
; )
1643 p
->count
-= p
->pc_count
;
1652 /* Also discard relocs on undefined weak syms with non-default
1654 if (h
->dyn_relocs
!= NULL
1655 && h
->root
.type
== bfd_link_hash_undefweak
)
1657 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1658 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1659 h
->dyn_relocs
= NULL
;
1661 /* Make sure undefined weak symbols are output as a dynamic
1663 else if (h
->dynindx
== -1
1664 && !h
->forced_local
)
1666 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1671 else if (ELIMINATE_COPY_RELOCS
)
1673 /* For the non-shared case, discard space for relocs against
1674 symbols which turn out to need copy relocs or are not
1680 || (htab
->elf
.dynamic_sections_created
1681 && (h
->root
.type
== bfd_link_hash_undefweak
1682 || h
->root
.type
== bfd_link_hash_undefined
))))
1684 /* Make sure this symbol is output as a dynamic symbol.
1685 Undefined weak syms won't yet be marked as dynamic. */
1686 if (h
->dynindx
== -1
1687 && !h
->forced_local
)
1689 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1693 /* If that succeeded, we know we'll be keeping all the
1695 if (h
->dynindx
!= -1)
1699 h
->dyn_relocs
= NULL
;
1704 /* Finally, allocate space. */
1705 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1707 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1708 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1714 /* Set the sizes of the dynamic sections. */
1717 elf_s390_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1718 struct bfd_link_info
*info
)
1720 struct elf_s390_link_hash_table
*htab
;
1726 htab
= elf_s390_hash_table (info
);
1730 dynobj
= htab
->elf
.dynobj
;
1734 if (htab
->elf
.dynamic_sections_created
)
1736 /* Set the contents of the .interp section to the interpreter. */
1737 if (bfd_link_executable (info
) && !info
->nointerp
)
1739 s
= bfd_get_linker_section (dynobj
, ".interp");
1742 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1743 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1747 if (htab
->elf
.sgot
&& s390_gotplt_after_got_p (info
))
1749 /* _bfd_elf_create_got_section adds the got header size always
1750 to .got.plt but we need it in .got if this section comes
1752 htab
->elf
.sgot
->size
+= 3 * GOT_ENTRY_SIZE
;
1753 htab
->elf
.sgotplt
->size
-= 3 * GOT_ENTRY_SIZE
;
1755 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1756 instead of .got.plt. */
1757 htab
->elf
.hgot
->root
.u
.def
.section
= htab
->elf
.sgot
;
1758 htab
->elf
.hgot
->root
.u
.def
.value
= 0;
1761 /* Set up .got offsets for local syms, and space for local dynamic
1763 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
1765 bfd_signed_vma
*local_got
;
1766 bfd_signed_vma
*end_local_got
;
1767 char *local_tls_type
;
1768 bfd_size_type locsymcount
;
1769 Elf_Internal_Shdr
*symtab_hdr
;
1771 struct plt_entry
*local_plt
;
1774 if (! is_s390_elf (ibfd
))
1777 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1779 struct elf_dyn_relocs
*p
;
1781 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
1783 if (!bfd_is_abs_section (p
->sec
)
1784 && bfd_is_abs_section (p
->sec
->output_section
))
1786 /* Input section has been discarded, either because
1787 it is a copy of a linkonce section or due to
1788 linker script /DISCARD/, so we'll be discarding
1791 else if (p
->count
!= 0)
1793 srela
= elf_section_data (p
->sec
)->sreloc
;
1794 srela
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1795 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1796 info
->flags
|= DF_TEXTREL
;
1801 local_got
= elf_local_got_refcounts (ibfd
);
1805 symtab_hdr
= &elf_symtab_hdr (ibfd
);
1806 locsymcount
= symtab_hdr
->sh_info
;
1807 end_local_got
= local_got
+ locsymcount
;
1808 local_tls_type
= elf_s390_local_got_tls_type (ibfd
);
1810 srela
= htab
->elf
.srelgot
;
1811 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1815 *local_got
= s
->size
;
1816 s
->size
+= GOT_ENTRY_SIZE
;
1817 if (*local_tls_type
== GOT_TLS_GD
)
1818 s
->size
+= GOT_ENTRY_SIZE
;
1819 if (bfd_link_pic (info
))
1820 srela
->size
+= sizeof (Elf64_External_Rela
);
1823 *local_got
= (bfd_vma
) -1;
1826 local_plt
= elf_s390_local_plt (ibfd
);
1827 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
1829 if (local_plt
[i
].plt
.refcount
> 0)
1831 local_plt
[i
].plt
.offset
= htab
->elf
.iplt
->size
;
1832 htab
->elf
.iplt
->size
+= PLT_ENTRY_SIZE
;
1833 htab
->elf
.igotplt
->size
+= GOT_ENTRY_SIZE
;
1834 htab
->elf
.irelplt
->size
+= sizeof (Elf64_External_Rela
);
1837 local_plt
[i
].plt
.offset
= (bfd_vma
) -1;
1841 if (htab
->tls_ldm_got
.refcount
> 0)
1843 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1845 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
1846 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
1847 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1850 htab
->tls_ldm_got
.offset
= -1;
1852 /* Allocate global sym .plt and .got entries, and space for global
1853 sym dynamic relocs. */
1854 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, info
);
1856 /* We now have determined the sizes of the various dynamic sections.
1857 Allocate memory for them. */
1859 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1861 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1864 if (s
== htab
->elf
.splt
1865 || s
== htab
->elf
.sgot
1866 || s
== htab
->elf
.sgotplt
1867 || s
== htab
->elf
.sdynbss
1868 || s
== htab
->elf
.sdynrelro
1869 || s
== htab
->elf
.iplt
1870 || s
== htab
->elf
.igotplt
1871 || s
== htab
->irelifunc
)
1873 /* Strip this section if we don't need it; see the
1876 else if (startswith (bfd_section_name (s
), ".rela"))
1878 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
1881 if (s
== htab
->elf
.irelplt
)
1883 /* In static-pie case, there are IRELATIVE-relocs in
1884 .rela.iplt (htab->irelplt), which will later be grouped
1885 to .rela.plt. On s390, the IRELATIVE relocations are
1886 always located in .rela.iplt - even for non-static case.
1887 Ensure that DT_JMPREL, DT_PLTRELA, DT_PLTRELASZ is added
1888 to the dynamic section even if htab->srelplt->size == 0.
1889 See _bfd_elf_add_dynamic_tags in bfd/elflink.c. */
1890 htab
->elf
.dt_jmprel_required
= true;
1894 /* We use the reloc_count field as a counter if we need
1895 to copy relocs into the output file. */
1900 /* It's not one of our sections, so don't allocate space. */
1906 /* If we don't need this section, strip it from the
1907 output file. This is to handle .rela.bss and
1908 .rela.plt. We must create it in
1909 create_dynamic_sections, because it must be created
1910 before the linker maps input sections to output
1911 sections. The linker does that before
1912 adjust_dynamic_symbol is called, and it is that
1913 function which decides whether anything needs to go
1914 into these sections. */
1916 s
->flags
|= SEC_EXCLUDE
;
1920 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1923 /* Allocate memory for the section contents. We use bfd_zalloc
1924 here in case unused entries are not reclaimed before the
1925 section's contents are written out. This should not happen,
1926 but this way if it does, we get a R_390_NONE reloc instead
1928 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
1929 if (s
->contents
== NULL
)
1933 return _bfd_elf_add_dynamic_tags (output_bfd
, info
, relocs
);
1936 /* Return the base VMA address which should be subtracted from real addresses
1937 when resolving @dtpoff relocation.
1938 This is PT_TLS segment p_vaddr. */
1941 dtpoff_base (struct bfd_link_info
*info
)
1943 /* If tls_sec is NULL, we should have signalled an error already. */
1944 if (elf_hash_table (info
)->tls_sec
== NULL
)
1946 return elf_hash_table (info
)->tls_sec
->vma
;
1949 /* Return the relocation value for @tpoff relocation
1950 if STT_TLS virtual address is ADDRESS. */
1953 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
1955 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
1957 /* If tls_sec is NULL, we should have signalled an error already. */
1958 if (htab
->tls_sec
== NULL
)
1960 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
1963 /* Complain if TLS instruction relocation is against an invalid
1967 invalid_tls_insn (bfd
*input_bfd
,
1968 asection
*input_section
,
1969 Elf_Internal_Rela
*rel
)
1971 reloc_howto_type
*howto
;
1973 howto
= elf_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
1975 /* xgettext:c-format */
1976 (_("%pB(%pA+%#" PRIx64
"): invalid instruction for TLS relocation %s"),
1979 (uint64_t) rel
->r_offset
,
1981 bfd_set_error (bfd_error_bad_value
);
1984 /* Relocate a 390 ELF section. */
1987 elf_s390_relocate_section (bfd
*output_bfd
,
1988 struct bfd_link_info
*info
,
1990 asection
*input_section
,
1992 Elf_Internal_Rela
*relocs
,
1993 Elf_Internal_Sym
*local_syms
,
1994 asection
**local_sections
)
1996 struct elf_s390_link_hash_table
*htab
;
1997 Elf_Internal_Shdr
*symtab_hdr
;
1998 struct elf_link_hash_entry
**sym_hashes
;
1999 bfd_vma
*local_got_offsets
;
2000 Elf_Internal_Rela
*rel
;
2001 Elf_Internal_Rela
*relend
;
2003 if (!is_s390_elf (input_bfd
))
2005 bfd_set_error (bfd_error_wrong_format
);
2009 htab
= elf_s390_hash_table (info
);
2013 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2014 sym_hashes
= elf_sym_hashes (input_bfd
);
2015 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2018 relend
= relocs
+ input_section
->reloc_count
;
2019 for (; rel
< relend
; rel
++)
2021 unsigned int r_type
;
2022 reloc_howto_type
*howto
;
2023 unsigned long r_symndx
;
2024 struct elf_link_hash_entry
*h
;
2025 Elf_Internal_Sym
*sym
;
2029 bool unresolved_reloc
;
2030 bfd_reloc_status_type r
;
2032 bool resolved_to_zero
;
2034 r_type
= ELF64_R_TYPE (rel
->r_info
);
2035 if (r_type
== (int) R_390_GNU_VTINHERIT
2036 || r_type
== (int) R_390_GNU_VTENTRY
)
2038 if (r_type
>= (int) R_390_max
)
2040 bfd_set_error (bfd_error_bad_value
);
2044 howto
= elf_howto_table
+ r_type
;
2045 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2050 unresolved_reloc
= false;
2051 if (r_symndx
< symtab_hdr
->sh_info
)
2053 sym
= local_syms
+ r_symndx
;
2054 sec
= local_sections
[r_symndx
];
2056 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2058 struct plt_entry
*local_plt
= elf_s390_local_plt (input_bfd
);
2059 if (local_plt
== NULL
)
2062 /* Address of the PLT slot. */
2063 relocation
= (htab
->elf
.iplt
->output_section
->vma
2064 + htab
->elf
.iplt
->output_offset
2065 + local_plt
[r_symndx
].plt
.offset
);
2069 case R_390_PLTOFF16
:
2070 case R_390_PLTOFF32
:
2071 case R_390_PLTOFF64
:
2072 relocation
-= s390_got_pointer (info
);
2074 case R_390_GOTPLT12
:
2075 case R_390_GOTPLT16
:
2076 case R_390_GOTPLT20
:
2077 case R_390_GOTPLT32
:
2078 case R_390_GOTPLT64
:
2079 case R_390_GOTPLTENT
:
2087 /* Write the PLT slot address into the GOT slot. */
2088 bfd_put_64 (output_bfd
, relocation
,
2089 htab
->elf
.sgot
->contents
+
2090 local_got_offsets
[r_symndx
]);
2091 relocation
= (local_got_offsets
[r_symndx
] +
2092 s390_got_offset (info
));
2094 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2095 relocation
+= s390_got_pointer (info
);
2101 /* The output section is needed later in
2102 finish_dynamic_section when creating the dynamic
2104 local_plt
[r_symndx
].sec
= sec
;
2108 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2112 bool warned ATTRIBUTE_UNUSED
;
2113 bool ignored ATTRIBUTE_UNUSED
;
2115 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2116 r_symndx
, symtab_hdr
, sym_hashes
,
2118 unresolved_reloc
, warned
, ignored
);
2121 if (sec
!= NULL
&& discarded_section (sec
))
2122 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2123 rel
, 1, relend
, howto
, 0, contents
);
2125 if (bfd_link_relocatable (info
))
2128 resolved_to_zero
= (h
!= NULL
2129 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
2133 case R_390_GOTPLT12
:
2134 case R_390_GOTPLT16
:
2135 case R_390_GOTPLT20
:
2136 case R_390_GOTPLT32
:
2137 case R_390_GOTPLT64
:
2138 case R_390_GOTPLTENT
:
2139 /* There are three cases for a GOTPLT relocation. 1) The
2140 relocation is against the jump slot entry of a plt that
2141 will get emitted to the output file. 2) The relocation
2142 is against the jump slot of a plt entry that has been
2143 removed. elf_s390_adjust_gotplt has created a GOT entry
2144 as replacement. 3) The relocation is against a local symbol.
2145 Cases 2) and 3) are the same as the GOT relocation code
2146 so we just have to test for case 1 and fall through for
2148 if (h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
2152 if (s390_is_ifunc_symbol_p (h
))
2154 /* Entry indices of .iplt and .igot.plt match
2155 1:1. No magic PLT first entry here. */
2156 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2157 relocation
= (plt_index
* GOT_ENTRY_SIZE
2158 + s390_gotplt_offset (info
)
2159 + htab
->elf
.igotplt
->output_offset
);
2163 plt_index
= ((h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
)
2166 relocation
= (plt_index
* GOT_ENTRY_SIZE
2167 + s390_gotplt_offset (info
));
2169 if (r_type
== R_390_GOTPLTENT
)
2170 relocation
+= s390_got_pointer (info
);
2171 unresolved_reloc
= false;
2182 /* Relocation is to the entry for this symbol in the global
2184 if (htab
->elf
.sgot
== NULL
)
2191 off
= h
->got
.offset
;
2192 dyn
= htab
->elf
.dynamic_sections_created
;
2194 if (s390_is_ifunc_symbol_p (h
))
2196 BFD_ASSERT (h
->plt
.offset
!= (bfd_vma
) -1);
2197 if (off
== (bfd_vma
)-1)
2199 /* No explicit GOT usage so redirect to the
2201 relocation
= (s390_gotplt_offset (info
)
2202 + htab
->elf
.igotplt
->output_offset
2203 + (h
->plt
.offset
/ PLT_ENTRY_SIZE
2206 /* For @GOTENT the relocation is against the offset between
2207 the instruction and the symbols entry in the GOT and not
2208 between the start of the GOT and the symbols entry. We
2209 add the vma of the GOT to get the correct value. */
2210 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2211 relocation
+= s390_got_pointer (info
);
2217 /* Explicit GOT slots must contain the address
2218 of the PLT slot. This will be handled in
2219 finish_dynamic_symbol. */
2222 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2223 bfd_link_pic (info
),
2225 || (bfd_link_pic (info
)
2226 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2227 || resolved_to_zero
)
2229 Elf_Internal_Sym
*isym
;
2232 /* This is actually a static link, or it is a
2233 -Bsymbolic link and the symbol is defined
2234 locally, or the symbol was forced to be local
2235 because of a version file. We must initialize
2236 this entry in the global offset table. Since the
2237 offset must always be a multiple of 2, we use the
2238 least significant bit to record whether we have
2239 initialized it already.
2241 When doing a dynamic link, we create a .rel.got
2242 relocation entry to initialize the value. This
2243 is done in the finish_dynamic_symbol routine. */
2248 bfd_put_64 (output_bfd
, relocation
,
2249 htab
->elf
.sgot
->contents
+ off
);
2253 /* When turning a GOT slot dereference into a direct
2254 reference using larl we have to make sure that
2255 the symbol is 1. properly aligned and 2. it is no
2256 ABS symbol or will become one. */
2258 && bfd_link_pic (info
)
2259 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2260 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2261 && ((r_type
== R_390_GOTENT
2262 && (bfd_get_16 (input_bfd
,
2263 contents
+ rel
->r_offset
- 2)
2264 & 0xff0f) == 0xc408)
2265 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2266 || (r_type
== R_390_GOT20
2267 && (bfd_get_32 (input_bfd
,
2268 contents
+ rel
->r_offset
- 2)
2269 & 0xff00f000) == 0xe300c000
2270 && bfd_get_8 (input_bfd
,
2271 contents
+ rel
->r_offset
+ 3) == 0x04))
2272 && (isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
,
2273 input_bfd
, r_symndx
))
2274 && isym
->st_shndx
!= SHN_ABS
2275 && h
!= htab
->elf
.hdynamic
2276 && h
!= htab
->elf
.hgot
2277 && h
!= htab
->elf
.hplt
2278 && !(isym
->st_value
& 1)
2279 && (sym_sec
= bfd_section_from_elf_index (input_bfd
,
2281 && sym_sec
->alignment_power
)
2283 unsigned short new_insn
=
2284 (0xc000 | (bfd_get_8 (input_bfd
,
2285 contents
+ rel
->r_offset
- 1) & 0xf0));
2286 bfd_put_16 (output_bfd
, new_insn
,
2287 contents
+ rel
->r_offset
- 2);
2288 r_type
= R_390_PC32DBL
;
2290 howto
= elf_howto_table
+ r_type
;
2291 relocation
= h
->root
.u
.def
.value
2292 + h
->root
.u
.def
.section
->output_section
->vma
2293 + h
->root
.u
.def
.section
->output_offset
;
2298 unresolved_reloc
= false;
2302 if (local_got_offsets
== NULL
)
2305 off
= local_got_offsets
[r_symndx
];
2307 /* The offset must always be a multiple of 8. We use
2308 the least significant bit to record whether we have
2309 already generated the necessary reloc. */
2314 bfd_put_64 (output_bfd
, relocation
,
2315 htab
->elf
.sgot
->contents
+ off
);
2317 if (bfd_link_pic (info
))
2320 Elf_Internal_Rela outrel
;
2323 s
= htab
->elf
.srelgot
;
2327 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2328 + htab
->elf
.sgot
->output_offset
2330 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2331 outrel
.r_addend
= relocation
;
2333 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2334 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2337 local_got_offsets
[r_symndx
] |= 1;
2341 if (off
>= (bfd_vma
) -2)
2344 relocation
= s390_got_offset (info
) + off
;
2346 /* For @GOTENT the relocation is against the offset between
2347 the instruction and the symbols entry in the GOT and not
2348 between the start of the GOT and the symbols entry. We
2349 add the vma of the GOT to get the correct value. */
2350 if ( r_type
== R_390_GOTENT
2351 || r_type
== R_390_GOTPLTENT
)
2352 relocation
+= s390_got_pointer (info
);
2356 case R_390_GOTOFF16
:
2357 case R_390_GOTOFF32
:
2358 case R_390_GOTOFF64
:
2359 /* Relocation is relative to the start of the global offset
2363 && s390_is_ifunc_symbol_p (h
)
2365 && !bfd_link_executable (info
))
2367 relocation
= (htab
->elf
.iplt
->output_section
->vma
2368 + htab
->elf
.iplt
->output_offset
2370 - s390_got_pointer (info
));
2374 relocation
-= s390_got_pointer (info
);
2378 case R_390_GOTPCDBL
:
2379 /* Use global offset table as symbol value. */
2380 relocation
= s390_got_pointer (info
);
2381 unresolved_reloc
= false;
2384 case R_390_PLT12DBL
:
2385 case R_390_PLT16DBL
:
2386 case R_390_PLT24DBL
:
2388 case R_390_PLT32DBL
:
2390 /* Relocation is to the entry for this symbol in the
2391 procedure linkage table. */
2393 /* Resolve a PLT32 reloc against a local symbol directly,
2394 without using the procedure linkage table. */
2398 if (h
->plt
.offset
== (bfd_vma
) -1
2399 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2401 /* We didn't make a PLT entry for this symbol. This
2402 happens when statically linking PIC code, or when
2403 using -Bsymbolic. */
2406 if (s390_is_ifunc_symbol_p (h
))
2407 relocation
= (htab
->elf
.iplt
->output_section
->vma
2408 + htab
->elf
.iplt
->output_offset
2411 relocation
= (htab
->elf
.splt
->output_section
->vma
2412 + htab
->elf
.splt
->output_offset
2414 unresolved_reloc
= false;
2417 case R_390_PLTOFF16
:
2418 case R_390_PLTOFF32
:
2419 case R_390_PLTOFF64
:
2420 /* Relocation is to the entry for this symbol in the
2421 procedure linkage table relative to the start of the GOT. */
2423 /* For local symbols or if we didn't make a PLT entry for
2424 this symbol resolve the symbol directly. */
2426 || h
->plt
.offset
== (bfd_vma
) -1
2427 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2429 relocation
-= s390_got_pointer (info
);
2433 if (s390_is_ifunc_symbol_p (h
))
2434 relocation
= (htab
->elf
.iplt
->output_section
->vma
2435 + htab
->elf
.iplt
->output_offset
2437 - s390_got_pointer (info
));
2439 relocation
= (htab
->elf
.splt
->output_section
->vma
2440 + htab
->elf
.splt
->output_offset
2442 - s390_got_pointer (info
));
2443 unresolved_reloc
= false;
2454 && bfd_link_pie (info
)
2457 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2458 "in shared library and accessed "
2460 "(rebuild file with -fPIC ?)"),
2461 input_bfd
, h
->root
.root
.string
);
2462 bfd_set_error (bfd_error_bad_value
);
2465 /* The target of these relocs are instruction operands
2466 residing in read-only sections. We cannot emit a runtime
2469 && s390_is_ifunc_symbol_p (h
)
2471 && bfd_link_pic (info
))
2473 relocation
= (htab
->elf
.iplt
->output_section
->vma
2474 + htab
->elf
.iplt
->output_offset
2485 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2489 && s390_is_ifunc_symbol_p (h
)
2492 if (!bfd_link_pic (info
))
2494 /* For a non-shared object the symbol will not
2495 change. Hence we can write the address of the
2496 target IPLT slot now. */
2497 relocation
= (htab
->elf
.iplt
->output_section
->vma
2498 + htab
->elf
.iplt
->output_offset
2504 /* For shared objects a runtime relocation is needed. */
2506 Elf_Internal_Rela outrel
;
2509 /* Need a dynamic relocation to get the real function
2511 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2515 if (outrel
.r_offset
== (bfd_vma
) -1
2516 || outrel
.r_offset
== (bfd_vma
) -2)
2519 outrel
.r_offset
+= (input_section
->output_section
->vma
2520 + input_section
->output_offset
);
2522 if (h
->dynindx
== -1
2524 || bfd_link_executable (info
))
2526 /* This symbol is resolved locally. */
2527 outrel
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
2528 outrel
.r_addend
= (h
->root
.u
.def
.value
2529 + h
->root
.u
.def
.section
->output_section
->vma
2530 + h
->root
.u
.def
.section
->output_offset
);
2534 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2535 outrel
.r_addend
= 0;
2538 sreloc
= htab
->elf
.irelifunc
;
2539 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2541 /* If this reloc is against an external symbol, we
2542 do not want to fiddle with the addend. Otherwise,
2543 we need to include the symbol value so that it
2544 becomes an addend for the dynamic reloc. For an
2545 internal symbol, we have updated addend. */
2550 if ((bfd_link_pic (info
)
2552 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2553 && !resolved_to_zero
)
2554 || h
->root
.type
!= bfd_link_hash_undefweak
)
2555 && ((r_type
!= R_390_PC16
2556 && r_type
!= R_390_PC12DBL
2557 && r_type
!= R_390_PC16DBL
2558 && r_type
!= R_390_PC24DBL
2559 && r_type
!= R_390_PC32
2560 && r_type
!= R_390_PC32DBL
2561 && r_type
!= R_390_PC64
)
2562 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2563 || (ELIMINATE_COPY_RELOCS
2564 && !bfd_link_pic (info
)
2570 || h
->root
.type
== bfd_link_hash_undefweak
2571 || h
->root
.type
== bfd_link_hash_undefined
)))
2573 Elf_Internal_Rela outrel
;
2574 bool skip
, relocate
;
2578 /* When generating a shared object, these relocations
2579 are copied into the output file to be resolved at run
2585 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2587 if (outrel
.r_offset
== (bfd_vma
) -1)
2589 else if (outrel
.r_offset
== (bfd_vma
) -2)
2590 skip
= true, relocate
= true;
2592 outrel
.r_offset
+= (input_section
->output_section
->vma
2593 + input_section
->output_offset
);
2596 memset (&outrel
, 0, sizeof outrel
);
2599 && (r_type
== R_390_PC16
2600 || r_type
== R_390_PC12DBL
2601 || r_type
== R_390_PC16DBL
2602 || r_type
== R_390_PC24DBL
2603 || r_type
== R_390_PC32
2604 || r_type
== R_390_PC32DBL
2605 || r_type
== R_390_PC64
2606 || !bfd_link_pic (info
)
2607 || !SYMBOLIC_BIND (info
, h
)
2608 || !h
->def_regular
))
2610 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2611 outrel
.r_addend
= rel
->r_addend
;
2615 /* This symbol is local, or marked to become local. */
2616 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2617 if (r_type
== R_390_64
)
2620 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2626 if (bfd_is_abs_section (sec
))
2628 else if (sec
== NULL
|| sec
->owner
== NULL
)
2630 bfd_set_error(bfd_error_bad_value
);
2637 osec
= sec
->output_section
;
2638 sindx
= elf_section_data (osec
)->dynindx
;
2642 osec
= htab
->elf
.text_index_section
;
2643 sindx
= elf_section_data (osec
)->dynindx
;
2645 BFD_ASSERT (sindx
!= 0);
2647 /* We are turning this relocation into one
2648 against a section symbol, so subtract out
2649 the output section's address but not the
2650 offset of the input section in the output
2652 outrel
.r_addend
-= osec
->vma
;
2654 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
2658 sreloc
= elf_section_data (input_section
)->sreloc
;
2662 loc
= sreloc
->contents
;
2663 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2664 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2666 /* If this reloc is against an external symbol, we do
2667 not want to fiddle with the addend. Otherwise, we
2668 need to include the symbol value so that it becomes
2669 an addend for the dynamic reloc. */
2676 /* Relocations for tls literal pool entries. */
2677 case R_390_TLS_IE64
:
2678 if (bfd_link_dll (info
))
2680 Elf_Internal_Rela outrel
;
2684 outrel
.r_offset
= rel
->r_offset
2685 + input_section
->output_section
->vma
2686 + input_section
->output_offset
;
2687 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2688 sreloc
= elf_section_data (input_section
)->sreloc
;
2691 loc
= sreloc
->contents
;
2692 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2693 bfd_elf64_swap_reloc_out (output_bfd
, &outrel
, loc
);
2697 case R_390_TLS_GD64
:
2698 case R_390_TLS_GOTIE64
:
2699 r_type
= elf_s390_tls_transition (info
, r_type
, h
== NULL
);
2700 tls_type
= GOT_UNKNOWN
;
2701 if (h
== NULL
&& local_got_offsets
)
2702 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2705 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2706 if (!bfd_link_dll (info
) && h
->dynindx
== -1 && tls_type
>= GOT_TLS_IE
)
2707 r_type
= R_390_TLS_LE64
;
2709 if (r_type
== R_390_TLS_GD64
&& tls_type
>= GOT_TLS_IE
)
2710 r_type
= R_390_TLS_IE64
;
2712 if (r_type
== R_390_TLS_LE64
)
2714 /* This relocation gets optimized away by the local exec
2715 access optimization. */
2716 BFD_ASSERT (! unresolved_reloc
);
2717 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2718 contents
+ rel
->r_offset
);
2722 if (htab
->elf
.sgot
== NULL
)
2726 off
= h
->got
.offset
;
2729 if (local_got_offsets
== NULL
)
2732 off
= local_got_offsets
[r_symndx
];
2741 Elf_Internal_Rela outrel
;
2745 if (htab
->elf
.srelgot
== NULL
)
2748 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2749 + htab
->elf
.sgot
->output_offset
+ off
);
2751 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2752 if (r_type
== R_390_TLS_GD64
)
2753 dr_type
= R_390_TLS_DTPMOD
;
2755 dr_type
= R_390_TLS_TPOFF
;
2756 if (dr_type
== R_390_TLS_TPOFF
&& indx
== 0)
2757 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2759 outrel
.r_addend
= 0;
2760 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
2761 loc
= htab
->elf
.srelgot
->contents
;
2762 loc
+= htab
->elf
.srelgot
->reloc_count
++
2763 * sizeof (Elf64_External_Rela
);
2764 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2766 if (r_type
== R_390_TLS_GD64
)
2770 BFD_ASSERT (! unresolved_reloc
);
2771 bfd_put_64 (output_bfd
,
2772 relocation
- dtpoff_base (info
),
2773 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2777 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_DTPOFF
);
2778 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
2779 outrel
.r_addend
= 0;
2780 htab
->elf
.srelgot
->reloc_count
++;
2781 loc
+= sizeof (Elf64_External_Rela
);
2782 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2789 local_got_offsets
[r_symndx
] |= 1;
2792 if (off
>= (bfd_vma
) -2)
2794 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
2796 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2797 if (r_type
== R_390_TLS_IE64
|| r_type
== R_390_TLS_IEENT
)
2798 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2799 unresolved_reloc
= false;
2803 bfd_put_64 (output_bfd
, htab
->elf
.sgot
->output_offset
+ off
,
2804 contents
+ rel
->r_offset
);
2809 case R_390_TLS_GOTIE12
:
2810 case R_390_TLS_GOTIE20
:
2811 case R_390_TLS_IEENT
:
2814 if (local_got_offsets
== NULL
)
2816 off
= local_got_offsets
[r_symndx
];
2817 if (bfd_link_dll (info
))
2818 goto emit_tls_relocs
;
2822 off
= h
->got
.offset
;
2823 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2824 if (bfd_link_dll (info
) || h
->dynindx
!= -1 || tls_type
< GOT_TLS_IE
)
2825 goto emit_tls_relocs
;
2828 if (htab
->elf
.sgot
== NULL
)
2831 BFD_ASSERT (! unresolved_reloc
);
2832 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2833 htab
->elf
.sgot
->contents
+ off
);
2834 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2835 if (r_type
== R_390_TLS_IEENT
)
2836 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2837 unresolved_reloc
= false;
2840 case R_390_TLS_LDM64
:
2841 if (! bfd_link_dll (info
))
2842 /* The literal pool entry this relocation refers to gets ignored
2843 by the optimized code of the local exec model. Do nothing
2844 and the value will turn out zero. */
2847 if (htab
->elf
.sgot
== NULL
)
2850 off
= htab
->tls_ldm_got
.offset
;
2855 Elf_Internal_Rela outrel
;
2858 if (htab
->elf
.srelgot
== NULL
)
2861 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2862 + htab
->elf
.sgot
->output_offset
+ off
);
2864 bfd_put_64 (output_bfd
, 0,
2865 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2866 outrel
.r_info
= ELF64_R_INFO (0, R_390_TLS_DTPMOD
);
2867 outrel
.r_addend
= 0;
2868 loc
= htab
->elf
.srelgot
->contents
;
2869 loc
+= htab
->elf
.srelgot
->reloc_count
++
2870 * sizeof (Elf64_External_Rela
);
2871 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2872 htab
->tls_ldm_got
.offset
|= 1;
2874 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2875 unresolved_reloc
= false;
2878 case R_390_TLS_LE64
:
2879 if (bfd_link_dll (info
))
2881 /* Linking a shared library with non-fpic code requires
2882 a R_390_TLS_TPOFF relocation. */
2883 Elf_Internal_Rela outrel
;
2888 outrel
.r_offset
= rel
->r_offset
2889 + input_section
->output_section
->vma
2890 + input_section
->output_offset
;
2891 if (h
!= NULL
&& h
->dynindx
!= -1)
2895 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_TPOFF
);
2897 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2899 outrel
.r_addend
= 0;
2900 sreloc
= elf_section_data (input_section
)->sreloc
;
2903 loc
= sreloc
->contents
;
2904 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2905 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2909 BFD_ASSERT (! unresolved_reloc
);
2910 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2911 contents
+ rel
->r_offset
);
2915 case R_390_TLS_LDO64
:
2916 if (bfd_link_dll (info
) || (input_section
->flags
& SEC_DEBUGGING
))
2917 relocation
-= dtpoff_base (info
);
2919 /* When converting LDO to LE, we must negate. */
2920 relocation
= -tpoff (info
, relocation
);
2923 /* Relocations for tls instructions. */
2924 case R_390_TLS_LOAD
:
2925 case R_390_TLS_GDCALL
:
2926 case R_390_TLS_LDCALL
:
2927 tls_type
= GOT_UNKNOWN
;
2928 if (h
== NULL
&& local_got_offsets
)
2929 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2931 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2933 if (tls_type
== GOT_TLS_GD
)
2936 if (r_type
== R_390_TLS_LOAD
)
2938 if (!bfd_link_dll (info
) && (h
== NULL
|| h
->dynindx
== -1))
2940 /* IE->LE transition. Four valid cases:
2941 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2942 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2943 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2944 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2945 unsigned int insn0
, insn1
, ry
;
2947 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2948 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
2949 if (insn1
!= 0x0004)
2951 invalid_tls_insn (input_bfd
, input_section
, rel
);
2954 if ((insn0
& 0xff00f000) == 0xe3000000)
2955 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2956 ry
= (insn0
& 0x000f0000);
2957 else if ((insn0
& 0xff0f0000) == 0xe3000000)
2958 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2959 ry
= (insn0
& 0x0000f000) << 4;
2960 else if ((insn0
& 0xff00f000) == 0xe300c000)
2961 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2962 ry
= (insn0
& 0x000f0000);
2963 else if ((insn0
& 0xff0f0000) == 0xe30c0000)
2964 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2965 ry
= (insn0
& 0x0000f000) << 4;
2968 invalid_tls_insn (input_bfd
, input_section
, rel
);
2971 insn0
= 0xeb000000 | (insn0
& 0x00f00000) | ry
;
2973 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
2974 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
2977 else if (r_type
== R_390_TLS_GDCALL
)
2979 unsigned int insn0
, insn1
;
2981 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2982 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
2983 if ((insn0
& 0xffff0000) != 0xc0e50000)
2985 invalid_tls_insn (input_bfd
, input_section
, rel
);
2988 if (!bfd_link_dll (info
) && (h
== NULL
|| h
->dynindx
== -1))
2990 /* GD->LE transition.
2991 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2997 /* GD->IE transition.
2998 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3002 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3003 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3005 else if (r_type
== R_390_TLS_LDCALL
)
3007 if (!bfd_link_dll (info
))
3009 unsigned int insn0
, insn1
;
3011 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3012 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3013 if ((insn0
& 0xffff0000) != 0xc0e50000)
3015 invalid_tls_insn (input_bfd
, input_section
, rel
);
3018 /* LD->LE transition.
3019 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3022 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3023 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3032 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3033 because such sections are not SEC_ALLOC and thus ld.so will
3034 not process them. */
3035 if (unresolved_reloc
3036 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3038 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3039 rel
->r_offset
) != (bfd_vma
) -1)
3041 /* xgettext:c-format */
3042 (_("%pB(%pA+%#" PRIx64
"): "
3043 "unresolvable %s relocation against symbol `%s'"),
3046 (uint64_t) rel
->r_offset
,
3048 h
->root
.root
.string
);
3052 /* When applying a 24 bit reloc we need to start one byte
3053 earlier. Otherwise the 32 bit get/put bfd operations might
3054 access a byte after the actual section. */
3055 if (r_type
== R_390_PC24DBL
3056 || r_type
== R_390_PLT24DBL
)
3059 if (r_type
== R_390_20
3060 || r_type
== R_390_GOT20
3061 || r_type
== R_390_GOTPLT20
3062 || r_type
== R_390_TLS_GOTIE20
)
3064 relocation
+= rel
->r_addend
;
3065 relocation
= (relocation
&0xfff) << 8 | (relocation
&0xff000) >> 12;
3066 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3067 contents
, rel
->r_offset
,
3071 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3072 contents
, rel
->r_offset
,
3073 relocation
, rel
->r_addend
);
3075 if (r
!= bfd_reloc_ok
)
3080 name
= h
->root
.root
.string
;
3083 name
= bfd_elf_string_from_elf_section (input_bfd
,
3084 symtab_hdr
->sh_link
,
3089 name
= bfd_section_name (sec
);
3092 if (r
== bfd_reloc_overflow
)
3093 (*info
->callbacks
->reloc_overflow
)
3094 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3095 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3099 /* xgettext:c-format */
3100 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
3101 input_bfd
, input_section
,
3102 (uint64_t) rel
->r_offset
, name
, (int) r
);
3111 /* Generate the PLT slots together with the dynamic relocations needed
3112 for IFUNC symbols. */
3115 elf_s390_finish_ifunc_symbol (bfd
*output_bfd
,
3116 struct bfd_link_info
*info
,
3117 struct elf_link_hash_entry
*h
,
3118 struct elf_s390_link_hash_table
*htab
,
3120 bfd_vma resolver_address
)
3124 Elf_Internal_Rela rela
;
3126 asection
*plt
, *gotplt
, *relplt
;
3128 if (htab
->elf
.iplt
== NULL
3129 || htab
->elf
.igotplt
== NULL
3130 || htab
->elf
.irelplt
== NULL
)
3133 /* Index of the PLT slot within iplt section. */
3134 plt_index
= plt_offset
/ PLT_ENTRY_SIZE
;
3135 plt
= htab
->elf
.iplt
;
3136 /* Offset into the igot.plt section. */
3137 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3138 gotplt
= htab
->elf
.igotplt
;
3139 relplt
= htab
->elf
.irelplt
;
3141 /* Fill in the blueprint of a PLT. */
3142 memcpy (plt
->contents
+ plt_offset
, elf_s390x_plt_entry
,
3145 /* Fixup the relative address to the GOT entry */
3146 bfd_put_32 (output_bfd
,
3147 (gotplt
->output_section
->vma
+
3148 gotplt
->output_offset
+ got_offset
3149 - (plt
->output_section
->vma
+
3150 plt
->output_offset
+
3152 plt
->contents
+ plt_offset
+ 2);
3153 /* Fixup the relative branch to PLT 0 */
3154 bfd_put_32 (output_bfd
, - (plt
->output_offset
+
3155 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3156 plt
->contents
+ plt_offset
+ 24);
3157 /* Fixup offset into .rela.plt section. */
3158 bfd_put_32 (output_bfd
, relplt
->output_offset
+
3159 plt_index
* sizeof (Elf64_External_Rela
),
3160 plt
->contents
+ plt_offset
+ 28);
3162 /* Fill in the entry in the global offset table.
3163 Points to instruction after GOT offset. */
3164 bfd_put_64 (output_bfd
,
3165 (plt
->output_section
->vma
3166 + plt
->output_offset
3169 gotplt
->contents
+ got_offset
);
3171 /* Fill in the entry in the .rela.plt section. */
3172 rela
.r_offset
= (gotplt
->output_section
->vma
3173 + gotplt
->output_offset
3178 || ((bfd_link_executable (info
)
3179 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
3182 /* The symbol can be locally resolved. */
3183 rela
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
3184 rela
.r_addend
= resolver_address
;
3188 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3192 loc
= relplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
3193 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3197 /* Finish up dynamic symbol handling. We set the contents of various
3198 dynamic sections here. */
3201 elf_s390_finish_dynamic_symbol (bfd
*output_bfd
,
3202 struct bfd_link_info
*info
,
3203 struct elf_link_hash_entry
*h
,
3204 Elf_Internal_Sym
*sym
)
3206 struct elf_s390_link_hash_table
*htab
;
3207 struct elf_s390_link_hash_entry
*eh
= (struct elf_s390_link_hash_entry
*)h
;
3209 htab
= elf_s390_hash_table (info
);
3213 if (h
->plt
.offset
!= (bfd_vma
) -1)
3216 bfd_vma gotplt_offset
;
3217 Elf_Internal_Rela rela
;
3220 /* This symbol has an entry in the procedure linkage table. Set
3222 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
3224 elf_s390_finish_ifunc_symbol (output_bfd
, info
, h
,
3225 htab
, h
->plt
.offset
,
3226 eh
->ifunc_resolver_address
+
3227 eh
->ifunc_resolver_section
->output_offset
+
3228 eh
->ifunc_resolver_section
->output_section
->vma
);
3230 /* Do not return yet. Handling of explicit GOT slots of
3231 IFUNC symbols is below. */
3235 if (h
->dynindx
== -1
3236 || htab
->elf
.splt
== NULL
3237 || htab
->elf
.sgotplt
== NULL
3238 || htab
->elf
.srelplt
== NULL
)
3242 Current offset - size first entry / entry size. */
3243 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3245 /* The slots in the .got.plt correspond to the PLT slots in
3247 gotplt_offset
= plt_index
* GOT_ENTRY_SIZE
;
3249 /* If .got.plt comes first it needs to contain the 3 header
3251 if (!s390_gotplt_after_got_p (info
))
3252 gotplt_offset
+= 3 * GOT_ENTRY_SIZE
;
3254 /* Fill in the blueprint of a PLT. */
3255 memcpy (htab
->elf
.splt
->contents
+ h
->plt
.offset
, elf_s390x_plt_entry
,
3258 /* The first instruction in the PLT entry is a LARL loading
3259 the address of the GOT slot. We write the 4 byte
3260 immediate operand of the LARL instruction here. */
3261 bfd_put_32 (output_bfd
,
3262 (htab
->elf
.sgotplt
->output_section
->vma
+
3263 htab
->elf
.sgotplt
->output_offset
+ gotplt_offset
3264 - (htab
->elf
.splt
->output_section
->vma
+
3265 htab
->elf
.splt
->output_offset
+
3267 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 2);
3268 /* Fixup the relative branch to PLT 0 */
3269 bfd_put_32 (output_bfd
, - (PLT_FIRST_ENTRY_SIZE
+
3270 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3271 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 24);
3272 /* Fixup offset into .rela.plt section. */
3273 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf64_External_Rela
),
3274 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 28);
3276 /* Fill in the entry in the global offset table.
3277 Points to instruction after GOT offset. */
3278 bfd_put_64 (output_bfd
,
3279 (htab
->elf
.splt
->output_section
->vma
3280 + htab
->elf
.splt
->output_offset
3283 htab
->elf
.sgotplt
->contents
+ gotplt_offset
);
3285 /* Fill in the entry in the .rela.plt section. */
3286 rela
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3287 + htab
->elf
.sgotplt
->output_offset
3289 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3291 loc
= htab
->elf
.srelplt
->contents
+ plt_index
*
3292 sizeof (Elf64_External_Rela
);
3293 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3295 if (!h
->def_regular
)
3297 /* Mark the symbol as undefined, rather than as defined in
3298 the .plt section. Leave the value alone. This is a clue
3299 for the dynamic linker, to make function pointer
3300 comparisons work between an application and shared
3302 sym
->st_shndx
= SHN_UNDEF
;
3307 if (h
->got
.offset
!= (bfd_vma
) -1
3308 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3309 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE
3310 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE_NLT
)
3312 Elf_Internal_Rela rela
;
3315 /* This symbol has an entry in the global offset table. Set it
3317 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
3320 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3321 + htab
->elf
.sgot
->output_offset
3322 + (h
->got
.offset
&~ (bfd_vma
) 1));
3324 if (h
->def_regular
&& s390_is_ifunc_symbol_p (h
))
3326 if (bfd_link_pic (info
))
3328 /* An explicit GOT slot usage needs GLOB_DAT. If the
3329 symbol references local the implicit got.iplt slot
3330 will be used and the IRELATIVE reloc has been created
3336 /* For non-shared objects explicit GOT slots must be
3337 filled with the PLT slot address for pointer
3338 equality reasons. */
3339 bfd_put_64 (output_bfd
, (htab
->elf
.iplt
->output_section
->vma
3340 + htab
->elf
.iplt
->output_offset
3342 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3346 else if (bfd_link_pic (info
)
3347 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3349 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
3352 /* If this is a static link, or it is a -Bsymbolic link and
3353 the symbol is defined locally or was forced to be local
3354 because of a version file, we just want to emit a
3355 RELATIVE reloc. The entry in the global offset table
3356 will already have been initialized in the
3357 relocate_section function. */
3358 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
3360 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3361 rela
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
3362 rela
.r_addend
= (h
->root
.u
.def
.value
3363 + h
->root
.u
.def
.section
->output_section
->vma
3364 + h
->root
.u
.def
.section
->output_offset
);
3368 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3370 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3371 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_GLOB_DAT
);
3375 loc
= htab
->elf
.srelgot
->contents
;
3376 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3377 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3382 Elf_Internal_Rela rela
;
3386 /* This symbols needs a copy reloc. Set it up. */
3388 if (h
->dynindx
== -1
3389 || (h
->root
.type
!= bfd_link_hash_defined
3390 && h
->root
.type
!= bfd_link_hash_defweak
)
3391 || htab
->elf
.srelbss
== NULL
)
3394 rela
.r_offset
= (h
->root
.u
.def
.value
3395 + h
->root
.u
.def
.section
->output_section
->vma
3396 + h
->root
.u
.def
.section
->output_offset
);
3397 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_COPY
);
3399 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3400 s
= htab
->elf
.sreldynrelro
;
3402 s
= htab
->elf
.srelbss
;
3403 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3404 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3407 /* Mark some specially defined symbols as absolute. */
3408 if (h
== htab
->elf
.hdynamic
3409 || h
== htab
->elf
.hgot
3410 || h
== htab
->elf
.hplt
)
3411 sym
->st_shndx
= SHN_ABS
;
3416 /* Used to decide how to sort relocs in an optimal manner for the
3417 dynamic linker, before writing them out. */
3419 static enum elf_reloc_type_class
3420 elf_s390_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3421 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3422 const Elf_Internal_Rela
*rela
)
3424 bfd
*abfd
= info
->output_bfd
;
3425 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3426 struct elf_s390_link_hash_table
*htab
= elf_s390_hash_table (info
);
3427 unsigned long r_symndx
= ELF64_R_SYM (rela
->r_info
);
3428 Elf_Internal_Sym sym
;
3430 if (htab
->elf
.dynsym
== NULL
3431 || !bed
->s
->swap_symbol_in (abfd
,
3432 (htab
->elf
.dynsym
->contents
3433 + r_symndx
* bed
->s
->sizeof_sym
),
3437 /* Check relocation against STT_GNU_IFUNC symbol. */
3438 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
3439 return reloc_class_ifunc
;
3441 switch ((int) ELF64_R_TYPE (rela
->r_info
))
3443 case R_390_RELATIVE
:
3444 return reloc_class_relative
;
3445 case R_390_JMP_SLOT
:
3446 return reloc_class_plt
;
3448 return reloc_class_copy
;
3450 return reloc_class_normal
;
3454 /* Finish up the dynamic sections. */
3457 elf_s390_finish_dynamic_sections (bfd
*output_bfd
,
3458 struct bfd_link_info
*info
)
3460 struct elf_s390_link_hash_table
*htab
;
3466 htab
= elf_s390_hash_table (info
);
3470 dynobj
= htab
->elf
.dynobj
;
3471 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3473 if (htab
->elf
.dynamic_sections_created
)
3475 Elf64_External_Dyn
*dyncon
, *dynconend
;
3477 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
3480 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
3481 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3482 for (; dyncon
< dynconend
; dyncon
++)
3484 Elf_Internal_Dyn dyn
;
3487 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3495 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3496 dyn
.d_un
.d_ptr
= s390_got_pointer (info
);
3500 s
= htab
->elf
.srelplt
;
3501 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3505 dyn
.d_un
.d_val
= htab
->elf
.srelplt
->size
;
3506 if (htab
->elf
.irelplt
)
3507 dyn
.d_un
.d_val
+= htab
->elf
.irelplt
->size
;
3511 /* The procedure linkage table relocs (DT_JMPREL) should
3512 not be included in the overall relocs (DT_RELA).
3513 Therefore, we override the DT_RELASZ entry here to
3514 make it not include the JMPREL relocs. Since the
3515 linker script arranges for .rela.plt to follow all
3516 other relocation sections, we don't have to worry
3517 about changing the DT_RELA entry. */
3518 dyn
.d_un
.d_val
-= htab
->elf
.srelplt
->size
;
3519 if (htab
->elf
.irelplt
)
3520 dyn
.d_un
.d_val
-= htab
->elf
.irelplt
->size
;
3524 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3527 /* Fill in the special first entry in the procedure linkage table. */
3528 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
3530 /* fill in blueprint for plt 0 entry */
3531 memcpy (htab
->elf
.splt
->contents
, elf_s390x_first_plt_entry
,
3532 PLT_FIRST_ENTRY_SIZE
);
3533 /* The second instruction in the first PLT entry is a LARL
3534 loading the GOT pointer. Fill in the LARL immediate
3536 bfd_put_32 (output_bfd
,
3537 (s390_got_pointer (info
)
3538 - htab
->elf
.splt
->output_section
->vma
3539 - htab
->elf
.splt
->output_offset
- 6)/2,
3540 htab
->elf
.splt
->contents
+ 8);
3542 if (elf_section_data (htab
->elf
.splt
->output_section
) != NULL
)
3543 elf_section_data (htab
->elf
.splt
->output_section
)->this_hdr
.sh_entsize
3547 if (htab
->elf
.hgot
&& htab
->elf
.hgot
->root
.u
.def
.section
)
3549 /* Fill in the first three entries in the global offset table. */
3550 if (htab
->elf
.hgot
->root
.u
.def
.section
->size
> 0)
3552 bfd_put_64 (output_bfd
,
3553 (sdyn
== NULL
? (bfd_vma
) 0
3554 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3555 htab
->elf
.hgot
->root
.u
.def
.section
->contents
);
3556 /* One entry for shared object struct ptr. */
3557 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
3558 htab
->elf
.hgot
->root
.u
.def
.section
->contents
+ 8);
3559 /* One entry for _dl_runtime_resolve. */
3560 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
3561 htab
->elf
.hgot
->root
.u
.def
.section
->contents
+ 16);
3563 if (htab
->elf
.sgot
!= NULL
&& htab
->elf
.sgot
->size
> 0)
3564 elf_section_data (htab
->elf
.sgot
->output_section
)
3565 ->this_hdr
.sh_entsize
= 8;
3568 /* Finish dynamic symbol for local IFUNC symbols. */
3569 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3571 struct plt_entry
*local_plt
;
3572 Elf_Internal_Sym
*isym
;
3573 Elf_Internal_Shdr
*symtab_hdr
;
3575 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3577 if (!is_s390_elf (ibfd
))
3580 local_plt
= elf_s390_local_plt (ibfd
);
3581 if (local_plt
!= NULL
)
3582 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
3584 if (local_plt
[i
].plt
.offset
!= (bfd_vma
) -1)
3586 asection
*sec
= local_plt
[i
].sec
;
3587 isym
= bfd_sym_from_r_symndx (&htab
->elf
.sym_cache
, ibfd
, i
);
3591 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3592 elf_s390_finish_ifunc_symbol (output_bfd
, info
, NULL
, htab
,
3593 local_plt
[i
].plt
.offset
,
3595 + sec
->output_section
->vma
3596 + sec
->output_offset
);
3605 /* Support for core dump NOTE sections. */
3608 elf_s390_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
3613 switch (note
->descsz
)
3618 case 336: /* sizeof(struct elf_prstatus) on s390x */
3620 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
3623 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 32);
3631 /* Make a ".reg/999" section. */
3632 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
3633 size
, note
->descpos
+ offset
);
3637 elf_s390_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
3639 switch (note
->descsz
)
3644 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3645 elf_tdata (abfd
)->core
->pid
3646 = bfd_get_32 (abfd
, note
->descdata
+ 24);
3647 elf_tdata (abfd
)->core
->program
3648 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
3649 elf_tdata (abfd
)->core
->command
3650 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
3653 /* Note that for some reason, a spurious space is tacked
3654 onto the end of the args in some (at least one anyway)
3655 implementations, so strip it off if it exists. */
3658 char *command
= elf_tdata (abfd
)->core
->command
;
3659 int n
= strlen (command
);
3661 if (0 < n
&& command
[n
- 1] == ' ')
3662 command
[n
- 1] = '\0';
3669 elf_s390_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
3681 char data
[136] ATTRIBUTE_NONSTRING
= { 0 };
3682 const char *fname
, *psargs
;
3684 va_start (ap
, note_type
);
3685 fname
= va_arg (ap
, const char *);
3686 psargs
= va_arg (ap
, const char *);
3689 strncpy (data
+ 40, fname
, 16);
3690 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3692 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3693 -Wstringop-truncation:
3694 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3696 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
;
3698 strncpy (data
+ 56, psargs
, 80);
3699 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3702 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
3703 &data
, sizeof (data
));
3708 char data
[336] = { 0 };
3713 va_start (ap
, note_type
);
3714 pid
= va_arg (ap
, long);
3715 cursig
= va_arg (ap
, int);
3716 gregs
= va_arg (ap
, const void *);
3719 bfd_put_16 (abfd
, cursig
, data
+ 12);
3720 bfd_put_32 (abfd
, pid
, data
+ 32);
3721 memcpy (data
+ 112, gregs
, 216);
3722 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
3723 &data
, sizeof (data
));
3729 /* Return address for Ith PLT stub in section PLT, for relocation REL
3730 or (bfd_vma) -1 if it should not be included. */
3733 elf_s390_plt_sym_val (bfd_vma i
, const asection
*plt
,
3734 const arelent
*rel ATTRIBUTE_UNUSED
)
3736 return plt
->vma
+ PLT_FIRST_ENTRY_SIZE
+ i
* PLT_ENTRY_SIZE
;
3739 /* Merge backend specific data from an object file to the output
3740 object file when linking. */
3743 elf64_s390_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
3745 if (!is_s390_elf (ibfd
) || !is_s390_elf (info
->output_bfd
))
3748 return elf_s390_merge_obj_attributes (ibfd
, info
);
3751 /* We may add a PT_S390_PGSTE program header. */
3754 elf_s390_additional_program_headers (bfd
*abfd ATTRIBUTE_UNUSED
,
3755 struct bfd_link_info
*info
)
3757 struct elf_s390_link_hash_table
*htab
;
3761 htab
= elf_s390_hash_table (info
);
3763 return htab
->params
->pgste
;
3769 /* Add the PT_S390_PGSTE program header. */
3772 elf_s390_modify_segment_map (bfd
*abfd
, struct bfd_link_info
*info
)
3774 struct elf_s390_link_hash_table
*htab
;
3775 struct elf_segment_map
*m
, *pm
= NULL
;
3780 htab
= elf_s390_hash_table (info
);
3781 if (!htab
|| !htab
->params
->pgste
)
3784 /* If there is already a PT_S390_PGSTE header, avoid adding
3786 m
= elf_seg_map (abfd
);
3787 while (m
&& m
->p_type
!= PT_S390_PGSTE
)
3796 m
= (struct elf_segment_map
*)
3797 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3800 m
->p_type
= PT_S390_PGSTE
;
3810 bfd_elf_s390_set_options (struct bfd_link_info
*info
,
3811 struct s390_elf_params
*params
)
3813 struct elf_s390_link_hash_table
*htab
;
3817 htab
= elf_s390_hash_table (info
);
3819 htab
->params
= params
;
3826 /* Why was the hash table entry size definition changed from
3827 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3828 this is the only reason for the s390_elf64_size_info structure. */
3830 const struct elf_size_info s390_elf64_size_info
=
3832 sizeof (Elf64_External_Ehdr
),
3833 sizeof (Elf64_External_Phdr
),
3834 sizeof (Elf64_External_Shdr
),
3835 sizeof (Elf64_External_Rel
),
3836 sizeof (Elf64_External_Rela
),
3837 sizeof (Elf64_External_Sym
),
3838 sizeof (Elf64_External_Dyn
),
3839 sizeof (Elf_External_Note
),
3840 8, /* hash-table entry size. */
3841 1, /* internal relocations per external relocations. */
3842 64, /* arch_size. */
3843 3, /* log_file_align. */
3844 ELFCLASS64
, EV_CURRENT
,
3845 bfd_elf64_write_out_phdrs
,
3846 bfd_elf64_write_shdrs_and_ehdr
,
3847 bfd_elf64_checksum_contents
,
3848 bfd_elf64_write_relocs
,
3849 bfd_elf64_swap_symbol_in
,
3850 bfd_elf64_swap_symbol_out
,
3851 bfd_elf64_slurp_reloc_table
,
3852 bfd_elf64_slurp_symbol_table
,
3853 bfd_elf64_swap_dyn_in
,
3854 bfd_elf64_swap_dyn_out
,
3855 bfd_elf64_swap_reloc_in
,
3856 bfd_elf64_swap_reloc_out
,
3857 bfd_elf64_swap_reloca_in
,
3858 bfd_elf64_swap_reloca_out
3861 #define TARGET_BIG_SYM s390_elf64_vec
3862 #define TARGET_BIG_NAME "elf64-s390"
3863 #define ELF_ARCH bfd_arch_s390
3864 #define ELF_TARGET_ID S390_ELF_DATA
3865 #define ELF_MACHINE_CODE EM_S390
3866 #define ELF_MACHINE_ALT1 EM_S390_OLD
3867 #define ELF_MAXPAGESIZE 0x1000
3869 #define elf_backend_size_info s390_elf64_size_info
3871 #define elf_backend_can_gc_sections 1
3872 #define elf_backend_can_refcount 1
3873 #define elf_backend_want_got_plt 1
3874 #define elf_backend_plt_readonly 1
3875 #define elf_backend_want_plt_sym 0
3876 #define elf_backend_got_header_size 24
3877 #define elf_backend_want_dynrelro 1
3878 #define elf_backend_rela_normal 1
3880 #define elf_info_to_howto elf_s390_info_to_howto
3882 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3883 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3884 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3885 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3886 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3888 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3889 #define elf_backend_check_relocs elf_s390_check_relocs
3890 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3891 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3892 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3893 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3894 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3895 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3896 #define elf_backend_relocate_section elf_s390_relocate_section
3897 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3898 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3899 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3900 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3901 #define elf_backend_write_core_note elf_s390_write_core_note
3902 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3903 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3904 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
3905 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
3907 #define bfd_elf64_mkobject elf_s390_mkobject
3908 #define elf_backend_object_p elf_s390_object_p
3910 #include "elf64-target.h"