1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2020 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 3 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
31 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
32 from smaller values. Start with zero, widen, *then* decrement. */
33 #define MINUS_ONE (((bfd_vma)0) - 1)
35 static bfd_reloc_status_type
36 s390_tls_reloc (bfd
*, arelent
*, asymbol
*, void *,
37 asection
*, bfd
*, char **);
38 static bfd_reloc_status_type
39 s390_elf_ldisp_reloc (bfd
*, arelent
*, asymbol
*, void *,
40 asection
*, bfd
*, char **);
42 /* The relocation "howto" table. */
43 static reloc_howto_type elf_howto_table
[] =
45 HOWTO (R_390_NONE
, /* type */
47 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
49 FALSE
, /* pc_relative */
51 complain_overflow_dont
, /* complain_on_overflow */
52 bfd_elf_generic_reloc
, /* special_function */
53 "R_390_NONE", /* name */
54 FALSE
, /* partial_inplace */
57 FALSE
), /* pcrel_offset */
59 HOWTO(R_390_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
60 bfd_elf_generic_reloc
, "R_390_8", FALSE
, 0,0x000000ff, FALSE
),
61 HOWTO(R_390_12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
62 bfd_elf_generic_reloc
, "R_390_12", FALSE
, 0,0x00000fff, FALSE
),
63 HOWTO(R_390_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_390_16", FALSE
, 0,0x0000ffff, FALSE
),
65 HOWTO(R_390_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_390_32", FALSE
, 0,0xffffffff, FALSE
),
67 HOWTO(R_390_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_390_PC32", FALSE
, 0,0xffffffff, TRUE
),
69 HOWTO(R_390_GOT12
, 0, 1, 12, FALSE
, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_390_GOT12", FALSE
, 0,0x00000fff, FALSE
),
71 HOWTO(R_390_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
72 bfd_elf_generic_reloc
, "R_390_GOT32", FALSE
, 0,0xffffffff, FALSE
),
73 HOWTO(R_390_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
74 bfd_elf_generic_reloc
, "R_390_PLT32", FALSE
, 0,0xffffffff, TRUE
),
75 HOWTO(R_390_COPY
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
76 bfd_elf_generic_reloc
, "R_390_COPY", FALSE
, 0,MINUS_ONE
, FALSE
),
77 HOWTO(R_390_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
78 bfd_elf_generic_reloc
, "R_390_GLOB_DAT", FALSE
, 0,MINUS_ONE
, FALSE
),
79 HOWTO(R_390_JMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
80 bfd_elf_generic_reloc
, "R_390_JMP_SLOT", FALSE
, 0,MINUS_ONE
, FALSE
),
81 HOWTO(R_390_RELATIVE
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_390_RELATIVE", FALSE
, 0,MINUS_ONE
, FALSE
),
83 HOWTO(R_390_GOTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_390_GOTOFF32", FALSE
, 0,MINUS_ONE
, FALSE
),
85 HOWTO(R_390_GOTPC
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_390_GOTPC", FALSE
, 0,MINUS_ONE
, TRUE
),
87 HOWTO(R_390_GOT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_390_GOT16", FALSE
, 0,0x0000ffff, FALSE
),
89 HOWTO(R_390_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_390_PC16", FALSE
, 0,0x0000ffff, TRUE
),
91 HOWTO(R_390_PC16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_390_PC16DBL", FALSE
, 0,0x0000ffff, TRUE
),
93 HOWTO(R_390_PLT16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_390_PLT16DBL", FALSE
, 0,0x0000ffff, TRUE
),
95 HOWTO(R_390_PC32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_390_PC32DBL", FALSE
, 0,0xffffffff, TRUE
),
97 HOWTO(R_390_PLT32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_390_PLT32DBL", FALSE
, 0,0xffffffff, TRUE
),
99 HOWTO(R_390_GOTPCDBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_390_GOTPCDBL", FALSE
, 0,MINUS_ONE
, TRUE
),
101 HOWTO(R_390_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_390_64", FALSE
, 0,MINUS_ONE
, FALSE
),
103 HOWTO(R_390_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_390_PC64", FALSE
, 0,MINUS_ONE
, TRUE
),
105 HOWTO(R_390_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
106 bfd_elf_generic_reloc
, "R_390_GOT64", FALSE
, 0,MINUS_ONE
, FALSE
),
107 HOWTO(R_390_PLT64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_390_PLT64", FALSE
, 0,MINUS_ONE
, TRUE
),
109 HOWTO(R_390_GOTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
110 bfd_elf_generic_reloc
, "R_390_GOTENT", FALSE
, 0,MINUS_ONE
, TRUE
),
111 HOWTO(R_390_GOTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
112 bfd_elf_generic_reloc
, "R_390_GOTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
113 HOWTO(R_390_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
114 bfd_elf_generic_reloc
, "R_390_GOTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
115 HOWTO(R_390_GOTPLT12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
116 bfd_elf_generic_reloc
, "R_390_GOTPLT12", FALSE
, 0,0x00000fff, FALSE
),
117 HOWTO(R_390_GOTPLT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_390_GOTPLT16", FALSE
, 0,0x0000ffff, FALSE
),
119 HOWTO(R_390_GOTPLT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_390_GOTPLT32", FALSE
, 0,0xffffffff, FALSE
),
121 HOWTO(R_390_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_390_GOTPLT64", FALSE
, 0,MINUS_ONE
, FALSE
),
123 HOWTO(R_390_GOTPLTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_390_GOTPLTENT",FALSE
, 0,MINUS_ONE
, TRUE
),
125 HOWTO(R_390_PLTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_390_PLTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
127 HOWTO(R_390_PLTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_390_PLTOFF32", FALSE
, 0,0xffffffff, FALSE
),
129 HOWTO(R_390_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
130 bfd_elf_generic_reloc
, "R_390_PLTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
131 HOWTO(R_390_TLS_LOAD
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
132 s390_tls_reloc
, "R_390_TLS_LOAD", FALSE
, 0, 0, FALSE
),
133 HOWTO(R_390_TLS_GDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
134 s390_tls_reloc
, "R_390_TLS_GDCALL", FALSE
, 0, 0, FALSE
),
135 HOWTO(R_390_TLS_LDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
136 s390_tls_reloc
, "R_390_TLS_LDCALL", FALSE
, 0, 0, FALSE
),
137 EMPTY_HOWTO (R_390_TLS_GD32
), /* Empty entry for R_390_TLS_GD32. */
138 HOWTO(R_390_TLS_GD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
139 bfd_elf_generic_reloc
, "R_390_TLS_GD64", FALSE
, 0, MINUS_ONE
, FALSE
),
140 HOWTO(R_390_TLS_GOTIE12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
141 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE12", FALSE
, 0, 0x00000fff, FALSE
),
142 EMPTY_HOWTO (R_390_TLS_GOTIE32
), /* Empty entry for R_390_TLS_GOTIE32. */
143 HOWTO(R_390_TLS_GOTIE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE64", FALSE
, 0, MINUS_ONE
, FALSE
),
145 EMPTY_HOWTO (R_390_TLS_LDM32
), /* Empty entry for R_390_TLS_LDM32. */
146 HOWTO(R_390_TLS_LDM64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
147 bfd_elf_generic_reloc
, "R_390_TLS_LDM64", FALSE
, 0, MINUS_ONE
, FALSE
),
148 EMPTY_HOWTO (R_390_TLS_IE32
), /* Empty entry for R_390_TLS_IE32. */
149 HOWTO(R_390_TLS_IE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
150 bfd_elf_generic_reloc
, "R_390_TLS_IE64", FALSE
, 0, MINUS_ONE
, FALSE
),
151 HOWTO(R_390_TLS_IEENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
152 bfd_elf_generic_reloc
, "R_390_TLS_IEENT", FALSE
, 0, MINUS_ONE
, TRUE
),
153 EMPTY_HOWTO (R_390_TLS_LE32
), /* Empty entry for R_390_TLS_LE32. */
154 HOWTO(R_390_TLS_LE64
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
155 bfd_elf_generic_reloc
, "R_390_TLS_LE64", FALSE
, 0, MINUS_ONE
, FALSE
),
156 EMPTY_HOWTO (R_390_TLS_LDO32
), /* Empty entry for R_390_TLS_LDO32. */
157 HOWTO(R_390_TLS_LDO64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
158 bfd_elf_generic_reloc
, "R_390_TLS_LDO64", FALSE
, 0, MINUS_ONE
, FALSE
),
159 HOWTO(R_390_TLS_DTPMOD
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
160 bfd_elf_generic_reloc
, "R_390_TLS_DTPMOD", FALSE
, 0, MINUS_ONE
, FALSE
),
161 HOWTO(R_390_TLS_DTPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
162 bfd_elf_generic_reloc
, "R_390_TLS_DTPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
163 HOWTO(R_390_TLS_TPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
164 bfd_elf_generic_reloc
, "R_390_TLS_TPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
165 HOWTO(R_390_20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
166 s390_elf_ldisp_reloc
, "R_390_20", FALSE
, 0,0x0fffff00, FALSE
),
167 HOWTO(R_390_GOT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
168 s390_elf_ldisp_reloc
, "R_390_GOT20", FALSE
, 0,0x0fffff00, FALSE
),
169 HOWTO(R_390_GOTPLT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
170 s390_elf_ldisp_reloc
, "R_390_GOTPLT20", FALSE
, 0,0x0fffff00, FALSE
),
171 HOWTO(R_390_TLS_GOTIE20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
172 s390_elf_ldisp_reloc
, "R_390_TLS_GOTIE20", FALSE
, 0,0x0fffff00, FALSE
),
173 HOWTO(R_390_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
174 bfd_elf_generic_reloc
, "R_390_IRELATIVE", FALSE
, 0, MINUS_ONE
, FALSE
),
175 HOWTO(R_390_PC12DBL
, 1, 1, 12, TRUE
, 0, complain_overflow_bitfield
,
176 bfd_elf_generic_reloc
, "R_390_PC12DBL", FALSE
, 0,0x00000fff, TRUE
),
177 HOWTO(R_390_PLT12DBL
, 1, 1, 12, TRUE
, 0, complain_overflow_bitfield
,
178 bfd_elf_generic_reloc
, "R_390_PLT12DBL", FALSE
, 0,0x00000fff, TRUE
),
179 HOWTO(R_390_PC24DBL
, 1, 2, 24, TRUE
, 0, complain_overflow_bitfield
,
180 bfd_elf_generic_reloc
, "R_390_PC24DBL", FALSE
, 0,0x00ffffff, TRUE
),
181 HOWTO(R_390_PLT24DBL
, 1, 2, 24, TRUE
, 0, complain_overflow_bitfield
,
182 bfd_elf_generic_reloc
, "R_390_PLT24DBL", FALSE
, 0,0x00ffffff, TRUE
),
185 /* GNU extension to record C++ vtable hierarchy. */
186 static reloc_howto_type elf64_s390_vtinherit_howto
=
187 HOWTO (R_390_GNU_VTINHERIT
, 0,4,0,FALSE
,0,complain_overflow_dont
, NULL
, "R_390_GNU_VTINHERIT", FALSE
,0, 0, FALSE
);
188 static reloc_howto_type elf64_s390_vtentry_howto
=
189 HOWTO (R_390_GNU_VTENTRY
, 0,4,0,FALSE
,0,complain_overflow_dont
, _bfd_elf_rel_vtable_reloc_fn
,"R_390_GNU_VTENTRY", FALSE
,0,0, FALSE
);
191 static reloc_howto_type
*
192 elf_s390_reloc_type_lookup (bfd
*abfd
,
193 bfd_reloc_code_real_type code
)
198 return &elf_howto_table
[(int) R_390_NONE
];
200 return &elf_howto_table
[(int) R_390_8
];
201 case BFD_RELOC_390_12
:
202 return &elf_howto_table
[(int) R_390_12
];
204 return &elf_howto_table
[(int) R_390_16
];
206 return &elf_howto_table
[(int) R_390_32
];
208 return &elf_howto_table
[(int) R_390_32
];
209 case BFD_RELOC_32_PCREL
:
210 return &elf_howto_table
[(int) R_390_PC32
];
211 case BFD_RELOC_390_GOT12
:
212 return &elf_howto_table
[(int) R_390_GOT12
];
213 case BFD_RELOC_32_GOT_PCREL
:
214 return &elf_howto_table
[(int) R_390_GOT32
];
215 case BFD_RELOC_390_PLT32
:
216 return &elf_howto_table
[(int) R_390_PLT32
];
217 case BFD_RELOC_390_COPY
:
218 return &elf_howto_table
[(int) R_390_COPY
];
219 case BFD_RELOC_390_GLOB_DAT
:
220 return &elf_howto_table
[(int) R_390_GLOB_DAT
];
221 case BFD_RELOC_390_JMP_SLOT
:
222 return &elf_howto_table
[(int) R_390_JMP_SLOT
];
223 case BFD_RELOC_390_RELATIVE
:
224 return &elf_howto_table
[(int) R_390_RELATIVE
];
225 case BFD_RELOC_32_GOTOFF
:
226 return &elf_howto_table
[(int) R_390_GOTOFF32
];
227 case BFD_RELOC_390_GOTPC
:
228 return &elf_howto_table
[(int) R_390_GOTPC
];
229 case BFD_RELOC_390_GOT16
:
230 return &elf_howto_table
[(int) R_390_GOT16
];
231 case BFD_RELOC_16_PCREL
:
232 return &elf_howto_table
[(int) R_390_PC16
];
233 case BFD_RELOC_390_PC12DBL
:
234 return &elf_howto_table
[(int) R_390_PC12DBL
];
235 case BFD_RELOC_390_PLT12DBL
:
236 return &elf_howto_table
[(int) R_390_PLT12DBL
];
237 case BFD_RELOC_390_PC16DBL
:
238 return &elf_howto_table
[(int) R_390_PC16DBL
];
239 case BFD_RELOC_390_PLT16DBL
:
240 return &elf_howto_table
[(int) R_390_PLT16DBL
];
241 case BFD_RELOC_390_PC24DBL
:
242 return &elf_howto_table
[(int) R_390_PC24DBL
];
243 case BFD_RELOC_390_PLT24DBL
:
244 return &elf_howto_table
[(int) R_390_PLT24DBL
];
245 case BFD_RELOC_390_PC32DBL
:
246 return &elf_howto_table
[(int) R_390_PC32DBL
];
247 case BFD_RELOC_390_PLT32DBL
:
248 return &elf_howto_table
[(int) R_390_PLT32DBL
];
249 case BFD_RELOC_390_GOTPCDBL
:
250 return &elf_howto_table
[(int) R_390_GOTPCDBL
];
252 return &elf_howto_table
[(int) R_390_64
];
253 case BFD_RELOC_64_PCREL
:
254 return &elf_howto_table
[(int) R_390_PC64
];
255 case BFD_RELOC_390_GOT64
:
256 return &elf_howto_table
[(int) R_390_GOT64
];
257 case BFD_RELOC_390_PLT64
:
258 return &elf_howto_table
[(int) R_390_PLT64
];
259 case BFD_RELOC_390_GOTENT
:
260 return &elf_howto_table
[(int) R_390_GOTENT
];
261 case BFD_RELOC_16_GOTOFF
:
262 return &elf_howto_table
[(int) R_390_GOTOFF16
];
263 case BFD_RELOC_390_GOTOFF64
:
264 return &elf_howto_table
[(int) R_390_GOTOFF64
];
265 case BFD_RELOC_390_GOTPLT12
:
266 return &elf_howto_table
[(int) R_390_GOTPLT12
];
267 case BFD_RELOC_390_GOTPLT16
:
268 return &elf_howto_table
[(int) R_390_GOTPLT16
];
269 case BFD_RELOC_390_GOTPLT32
:
270 return &elf_howto_table
[(int) R_390_GOTPLT32
];
271 case BFD_RELOC_390_GOTPLT64
:
272 return &elf_howto_table
[(int) R_390_GOTPLT64
];
273 case BFD_RELOC_390_GOTPLTENT
:
274 return &elf_howto_table
[(int) R_390_GOTPLTENT
];
275 case BFD_RELOC_390_PLTOFF16
:
276 return &elf_howto_table
[(int) R_390_PLTOFF16
];
277 case BFD_RELOC_390_PLTOFF32
:
278 return &elf_howto_table
[(int) R_390_PLTOFF32
];
279 case BFD_RELOC_390_PLTOFF64
:
280 return &elf_howto_table
[(int) R_390_PLTOFF64
];
281 case BFD_RELOC_390_TLS_LOAD
:
282 return &elf_howto_table
[(int) R_390_TLS_LOAD
];
283 case BFD_RELOC_390_TLS_GDCALL
:
284 return &elf_howto_table
[(int) R_390_TLS_GDCALL
];
285 case BFD_RELOC_390_TLS_LDCALL
:
286 return &elf_howto_table
[(int) R_390_TLS_LDCALL
];
287 case BFD_RELOC_390_TLS_GD64
:
288 return &elf_howto_table
[(int) R_390_TLS_GD64
];
289 case BFD_RELOC_390_TLS_GOTIE12
:
290 return &elf_howto_table
[(int) R_390_TLS_GOTIE12
];
291 case BFD_RELOC_390_TLS_GOTIE64
:
292 return &elf_howto_table
[(int) R_390_TLS_GOTIE64
];
293 case BFD_RELOC_390_TLS_LDM64
:
294 return &elf_howto_table
[(int) R_390_TLS_LDM64
];
295 case BFD_RELOC_390_TLS_IE64
:
296 return &elf_howto_table
[(int) R_390_TLS_IE64
];
297 case BFD_RELOC_390_TLS_IEENT
:
298 return &elf_howto_table
[(int) R_390_TLS_IEENT
];
299 case BFD_RELOC_390_TLS_LE64
:
300 return &elf_howto_table
[(int) R_390_TLS_LE64
];
301 case BFD_RELOC_390_TLS_LDO64
:
302 return &elf_howto_table
[(int) R_390_TLS_LDO64
];
303 case BFD_RELOC_390_TLS_DTPMOD
:
304 return &elf_howto_table
[(int) R_390_TLS_DTPMOD
];
305 case BFD_RELOC_390_TLS_DTPOFF
:
306 return &elf_howto_table
[(int) R_390_TLS_DTPOFF
];
307 case BFD_RELOC_390_TLS_TPOFF
:
308 return &elf_howto_table
[(int) R_390_TLS_TPOFF
];
309 case BFD_RELOC_390_20
:
310 return &elf_howto_table
[(int) R_390_20
];
311 case BFD_RELOC_390_GOT20
:
312 return &elf_howto_table
[(int) R_390_GOT20
];
313 case BFD_RELOC_390_GOTPLT20
:
314 return &elf_howto_table
[(int) R_390_GOTPLT20
];
315 case BFD_RELOC_390_TLS_GOTIE20
:
316 return &elf_howto_table
[(int) R_390_TLS_GOTIE20
];
317 case BFD_RELOC_390_IRELATIVE
:
318 return &elf_howto_table
[(int) R_390_IRELATIVE
];
319 case BFD_RELOC_VTABLE_INHERIT
:
320 return &elf64_s390_vtinherit_howto
;
321 case BFD_RELOC_VTABLE_ENTRY
:
322 return &elf64_s390_vtentry_howto
;
327 /* xgettext:c-format */
328 _bfd_error_handler (_("%pB: unsupported relocation type %#x"), abfd
, (int) code
);
329 bfd_set_error (bfd_error_bad_value
);
333 static reloc_howto_type
*
334 elf_s390_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
340 i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]);
342 if (elf_howto_table
[i
].name
!= NULL
343 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
344 return &elf_howto_table
[i
];
346 if (strcasecmp (elf64_s390_vtinherit_howto
.name
, r_name
) == 0)
347 return &elf64_s390_vtinherit_howto
;
348 if (strcasecmp (elf64_s390_vtentry_howto
.name
, r_name
) == 0)
349 return &elf64_s390_vtentry_howto
;
354 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
355 and elf64-s390.c has its own copy. */
358 elf_s390_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
360 Elf_Internal_Rela
*dst
)
362 unsigned int r_type
= ELF64_R_TYPE(dst
->r_info
);
366 case R_390_GNU_VTINHERIT
:
367 cache_ptr
->howto
= &elf64_s390_vtinherit_howto
;
370 case R_390_GNU_VTENTRY
:
371 cache_ptr
->howto
= &elf64_s390_vtentry_howto
;
375 if (r_type
>= sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]))
377 /* xgettext:c-format */
378 _bfd_error_handler (_("%pB: unsupported relocation type %#x"),
380 bfd_set_error (bfd_error_bad_value
);
383 cache_ptr
->howto
= &elf_howto_table
[r_type
];
388 /* A relocation function which doesn't do anything. */
389 static bfd_reloc_status_type
390 s390_tls_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
391 arelent
*reloc_entry
,
392 asymbol
*symbol ATTRIBUTE_UNUSED
,
393 void * data ATTRIBUTE_UNUSED
,
394 asection
*input_section
,
396 char **error_message ATTRIBUTE_UNUSED
)
399 reloc_entry
->address
+= input_section
->output_offset
;
403 /* Handle the large displacement relocs. */
404 static bfd_reloc_status_type
405 s390_elf_ldisp_reloc (bfd
*abfd
,
406 arelent
*reloc_entry
,
409 asection
*input_section
,
411 char **error_message ATTRIBUTE_UNUSED
)
413 reloc_howto_type
*howto
= reloc_entry
->howto
;
417 if (output_bfd
!= (bfd
*) NULL
418 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
419 && (! howto
->partial_inplace
420 || reloc_entry
->addend
== 0))
422 reloc_entry
->address
+= input_section
->output_offset
;
425 if (output_bfd
!= NULL
)
426 return bfd_reloc_continue
;
428 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
429 return bfd_reloc_outofrange
;
431 relocation
= (symbol
->value
432 + symbol
->section
->output_section
->vma
433 + symbol
->section
->output_offset
);
434 relocation
+= reloc_entry
->addend
;
435 if (howto
->pc_relative
)
437 relocation
-= (input_section
->output_section
->vma
438 + input_section
->output_offset
);
439 relocation
-= reloc_entry
->address
;
442 insn
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ reloc_entry
->address
);
443 insn
|= (relocation
& 0xfff) << 16 | (relocation
& 0xff000) >> 4;
444 bfd_put_32 (abfd
, insn
, (bfd_byte
*) data
+ reloc_entry
->address
);
446 if ((bfd_signed_vma
) relocation
< - 0x80000
447 || (bfd_signed_vma
) relocation
> 0x7ffff)
448 return bfd_reloc_overflow
;
454 elf_s390_is_local_label_name (bfd
*abfd
, const char *name
)
456 if (name
[0] == '.' && (name
[1] == 'X' || name
[1] == 'L'))
459 return _bfd_elf_is_local_label_name (abfd
, name
);
462 /* Functions for the 390 ELF linker. */
464 /* The name of the dynamic interpreter. This is put in the .interp
467 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
469 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
470 copying dynamic variables from a shared lib into an app's dynbss
471 section, and instead use a dynamic relocation to point into the
473 #define ELIMINATE_COPY_RELOCS 1
475 /* The size in bytes of the first entry in the procedure linkage table. */
476 #define PLT_FIRST_ENTRY_SIZE 32
477 /* The size in bytes of an entry in the procedure linkage table. */
478 #define PLT_ENTRY_SIZE 32
480 #define GOT_ENTRY_SIZE 8
482 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
484 /* The first three entries in a global offset table are reserved,
485 and the initial contents are unimportant (we zero them out).
486 Subsequent entries look like this. See the SVR4 ABI 386
487 supplement to see how this works. */
489 /* For the s390, simple addr offset can only be 0 - 4096.
490 To use the full 16777216 TB address space, several instructions
491 are needed to load an address in a register and execute
492 a branch( or just saving the address)
494 Furthermore, only r 0 and 1 are free to use!!! */
496 /* The first 3 words in the GOT are then reserved.
497 Word 0 is the address of the dynamic table.
498 Word 1 is a pointer to a structure describing the object
499 Word 2 is used to point to the loader entry address.
501 The code for PLT entries looks like this:
503 The GOT holds the address in the PLT to be executed.
504 The loader then gets:
505 48(15) = Pointer to the structure describing the object.
506 56(15) = Offset in symbol table
507 The loader must then find the module where the function is
508 and insert the address in the GOT.
510 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
511 LG 1,0(1) # 6 bytes Load address from GOT in r1
512 BCR 15,1 # 2 bytes Jump to address
513 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
514 LGF 1,12(1) # 6 bytes Load rela.plt offset into r1
515 BRCL 15,-x # 6 bytes Jump to first PLT entry
516 .long ? # 4 bytes offset into .rela.plt
518 Total = 32 bytes per PLT entry
519 Fixup at offset 2: relative address to GOT entry
520 Fixup at offset 22: relative branch to PLT0
521 Fixup at offset 28: 32 bit offset into .rela.plt
523 A 32 bit offset into the symbol table is enough. It allows for
524 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
525 object (the main program, any shared library) is limited to 4GB in
526 size. Having a .rela.plt of 2GB would already make the .plt
527 section bigger than 8GB. */
529 static const bfd_byte elf_s390x_plt_entry
[PLT_ENTRY_SIZE
] =
531 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
532 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
533 0x07, 0xf1, /* br %r1 */
534 0x0d, 0x10, /* basr %r1,%r0 */
535 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
536 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
537 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
540 /* The first PLT entry pushes the offset into the symbol table
541 from R1 onto the stack at 56(15) and the loader object info
542 at 48(15), loads the loader address in R1 and jumps to it. */
544 /* The first entry in the PLT:
547 STG 1,56(15) # r1 contains the offset into the symbol table
548 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
549 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
550 LG 1,16(1) # get entry address of loader
551 BCR 15,1 # jump to loader
553 Fixup at offset 8: relative address to start of GOT. */
555 static const bfd_byte elf_s390x_first_plt_entry
[PLT_FIRST_ENTRY_SIZE
] =
557 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
558 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
559 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
560 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
561 0x07, 0xf1, /* br %r1 */
562 0x07, 0x00, /* nopr %r0 */
563 0x07, 0x00, /* nopr %r0 */
564 0x07, 0x00 /* nopr %r0 */
568 /* s390 ELF linker hash entry. */
570 struct elf_s390_link_hash_entry
572 struct elf_link_hash_entry elf
;
574 /* 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 /* Small local sym cache. */
667 struct sym_cache sym_cache
;
669 /* Options passed from the linker. */
670 struct s390_elf_params
*params
;
673 /* Get the s390 ELF linker hash table from a link_info structure. */
675 #define elf_s390_hash_table(p) \
676 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
677 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
680 #include "elf-s390-common.c"
682 /* Create an entry in an s390 ELF linker hash table. */
684 static struct bfd_hash_entry
*
685 link_hash_newfunc (struct bfd_hash_entry
*entry
,
686 struct bfd_hash_table
*table
,
689 /* Allocate the structure if it has not already been allocated by a
693 entry
= bfd_hash_allocate (table
,
694 sizeof (struct elf_s390_link_hash_entry
));
699 /* Call the allocation method of the superclass. */
700 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
703 struct elf_s390_link_hash_entry
*eh
;
705 eh
= (struct elf_s390_link_hash_entry
*) entry
;
706 eh
->gotplt_refcount
= 0;
707 eh
->tls_type
= GOT_UNKNOWN
;
708 eh
->ifunc_resolver_address
= 0;
709 eh
->ifunc_resolver_section
= NULL
;
715 /* Create an s390 ELF linker hash table. */
717 static struct bfd_link_hash_table
*
718 elf_s390_link_hash_table_create (bfd
*abfd
)
720 struct elf_s390_link_hash_table
*ret
;
721 size_t amt
= sizeof (struct elf_s390_link_hash_table
);
723 ret
= (struct elf_s390_link_hash_table
*) bfd_zmalloc (amt
);
727 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
728 sizeof (struct elf_s390_link_hash_entry
),
735 return &ret
->elf
.root
;
738 /* Copy the extra info we tack onto an elf_link_hash_entry. */
741 elf_s390_copy_indirect_symbol (struct bfd_link_info
*info
,
742 struct elf_link_hash_entry
*dir
,
743 struct elf_link_hash_entry
*ind
)
745 struct elf_s390_link_hash_entry
*edir
, *eind
;
747 edir
= (struct elf_s390_link_hash_entry
*) dir
;
748 eind
= (struct elf_s390_link_hash_entry
*) ind
;
750 if (ind
->dyn_relocs
!= NULL
)
752 if (dir
->dyn_relocs
!= NULL
)
754 struct elf_dyn_relocs
**pp
;
755 struct elf_dyn_relocs
*p
;
757 /* Add reloc counts against the indirect sym to the direct sym
758 list. Merge any entries against the same section. */
759 for (pp
= &ind
->dyn_relocs
; (p
= *pp
) != NULL
; )
761 struct elf_dyn_relocs
*q
;
763 for (q
= dir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
764 if (q
->sec
== p
->sec
)
766 q
->pc_count
+= p
->pc_count
;
767 q
->count
+= p
->count
;
774 *pp
= dir
->dyn_relocs
;
777 dir
->dyn_relocs
= ind
->dyn_relocs
;
778 ind
->dyn_relocs
= NULL
;
781 if (ind
->root
.type
== bfd_link_hash_indirect
782 && dir
->got
.refcount
<= 0)
784 edir
->tls_type
= eind
->tls_type
;
785 eind
->tls_type
= GOT_UNKNOWN
;
788 if (ELIMINATE_COPY_RELOCS
789 && ind
->root
.type
!= bfd_link_hash_indirect
790 && dir
->dynamic_adjusted
)
792 /* If called to transfer flags for a weakdef during processing
793 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
794 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
795 if (dir
->versioned
!= versioned_hidden
)
796 dir
->ref_dynamic
|= ind
->ref_dynamic
;
797 dir
->ref_regular
|= ind
->ref_regular
;
798 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
799 dir
->needs_plt
|= ind
->needs_plt
;
802 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
806 elf_s390_tls_transition (struct bfd_link_info
*info
,
810 if (bfd_link_pic (info
))
818 return R_390_TLS_LE64
;
819 return R_390_TLS_IE64
;
820 case R_390_TLS_GOTIE64
:
822 return R_390_TLS_LE64
;
823 return R_390_TLS_GOTIE64
;
824 case R_390_TLS_LDM64
:
825 return R_390_TLS_LE64
;
831 /* Look through the relocs for a section during the first phase, and
832 allocate space in the global offset table or procedure linkage
836 elf_s390_check_relocs (bfd
*abfd
,
837 struct bfd_link_info
*info
,
839 const Elf_Internal_Rela
*relocs
)
841 struct elf_s390_link_hash_table
*htab
;
842 Elf_Internal_Shdr
*symtab_hdr
;
843 struct elf_link_hash_entry
**sym_hashes
;
844 const Elf_Internal_Rela
*rel
;
845 const Elf_Internal_Rela
*rel_end
;
847 bfd_signed_vma
*local_got_refcounts
;
848 int tls_type
, old_tls_type
;
850 if (bfd_link_relocatable (info
))
853 BFD_ASSERT (is_s390_elf (abfd
));
855 htab
= elf_s390_hash_table (info
);
859 symtab_hdr
= &elf_symtab_hdr (abfd
);
860 sym_hashes
= elf_sym_hashes (abfd
);
861 local_got_refcounts
= elf_local_got_refcounts (abfd
);
865 rel_end
= relocs
+ sec
->reloc_count
;
866 for (rel
= relocs
; rel
< rel_end
; rel
++)
869 unsigned int r_symndx
;
870 struct elf_link_hash_entry
*h
;
871 Elf_Internal_Sym
*isym
;
873 r_symndx
= ELF64_R_SYM (rel
->r_info
);
875 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
877 /* xgettext:c-format */
878 _bfd_error_handler (_("%pB: bad symbol index: %d"),
883 if (r_symndx
< symtab_hdr
->sh_info
)
885 /* A local symbol. */
886 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
891 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
893 struct plt_entry
*plt
;
895 if (htab
->elf
.dynobj
== NULL
)
896 htab
->elf
.dynobj
= abfd
;
898 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
901 if (local_got_refcounts
== NULL
)
903 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
905 local_got_refcounts
= elf_local_got_refcounts (abfd
);
907 plt
= elf_s390_local_plt (abfd
);
908 plt
[r_symndx
].plt
.refcount
++;
914 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
915 while (h
->root
.type
== bfd_link_hash_indirect
916 || h
->root
.type
== bfd_link_hash_warning
)
917 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
920 /* Create got section and local_got_refcounts array if they
922 r_type
= elf_s390_tls_transition (info
,
923 ELF64_R_TYPE (rel
->r_info
),
938 case R_390_GOTPLTENT
:
940 case R_390_TLS_GOTIE12
:
941 case R_390_TLS_GOTIE20
:
942 case R_390_TLS_GOTIE64
:
943 case R_390_TLS_IEENT
:
945 case R_390_TLS_LDM64
:
947 && local_got_refcounts
== NULL
)
949 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
951 local_got_refcounts
= elf_local_got_refcounts (abfd
);
960 if (htab
->elf
.sgot
== NULL
)
962 if (htab
->elf
.dynobj
== NULL
)
963 htab
->elf
.dynobj
= abfd
;
964 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
971 if (htab
->elf
.dynobj
== NULL
)
972 htab
->elf
.dynobj
= abfd
;
973 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
976 /* Make sure an IFUNC symbol defined in a non-shared object
977 always gets a PLT slot. */
978 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
980 /* The symbol is called by the dynamic loader in order
981 to resolve the relocation. So it is in fact also
992 /* These relocs do not need a GOT slot. They just load the
993 GOT pointer itself or address something else relative to
994 the GOT. Since the GOT pointer has been set up above we
1000 if (h
== NULL
|| !s390_is_ifunc_symbol_p (h
) || !h
->def_regular
)
1004 case R_390_PLT12DBL
:
1005 case R_390_PLT16DBL
:
1006 case R_390_PLT24DBL
:
1008 case R_390_PLT32DBL
:
1010 case R_390_PLTOFF16
:
1011 case R_390_PLTOFF32
:
1012 case R_390_PLTOFF64
:
1013 /* This symbol requires a procedure linkage table entry. We
1014 actually build the entry in adjust_dynamic_symbol,
1015 because this might be a case of linking PIC code which is
1016 never referenced by a dynamic object, in which case we
1017 don't need to generate a procedure linkage table entry
1020 /* If this is a local symbol, we resolve it directly without
1021 creating a procedure linkage table entry. */
1025 h
->plt
.refcount
+= 1;
1029 case R_390_GOTPLT12
:
1030 case R_390_GOTPLT16
:
1031 case R_390_GOTPLT20
:
1032 case R_390_GOTPLT32
:
1033 case R_390_GOTPLT64
:
1034 case R_390_GOTPLTENT
:
1035 /* This symbol requires either a procedure linkage table entry
1036 or an entry in the local got. We actually build the entry
1037 in adjust_dynamic_symbol because whether this is really a
1038 global reference can change and with it the fact if we have
1039 to create a plt entry or a local got entry. To be able to
1040 make a once global symbol a local one we have to keep track
1041 of the number of gotplt references that exist for this
1045 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
++;
1047 h
->plt
.refcount
+= 1;
1050 local_got_refcounts
[r_symndx
] += 1;
1053 case R_390_TLS_LDM64
:
1054 htab
->tls_ldm_got
.refcount
+= 1;
1057 case R_390_TLS_IE64
:
1058 case R_390_TLS_GOTIE12
:
1059 case R_390_TLS_GOTIE20
:
1060 case R_390_TLS_GOTIE64
:
1061 case R_390_TLS_IEENT
:
1062 if (bfd_link_pic (info
))
1063 info
->flags
|= DF_STATIC_TLS
;
1072 case R_390_TLS_GD64
:
1073 /* This symbol requires a global offset table entry. */
1082 tls_type
= GOT_NORMAL
;
1084 case R_390_TLS_GD64
:
1085 tls_type
= GOT_TLS_GD
;
1087 case R_390_TLS_IE64
:
1088 case R_390_TLS_GOTIE64
:
1089 tls_type
= GOT_TLS_IE
;
1091 case R_390_TLS_GOTIE12
:
1092 case R_390_TLS_GOTIE20
:
1093 case R_390_TLS_IEENT
:
1094 tls_type
= GOT_TLS_IE_NLT
;
1100 h
->got
.refcount
+= 1;
1101 old_tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1105 local_got_refcounts
[r_symndx
] += 1;
1106 old_tls_type
= elf_s390_local_got_tls_type (abfd
) [r_symndx
];
1108 /* If a TLS symbol is accessed using IE at least once,
1109 there is no point to use dynamic model for it. */
1110 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
)
1112 if (old_tls_type
== GOT_NORMAL
|| tls_type
== GOT_NORMAL
)
1115 /* xgettext:c-format */
1116 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1117 abfd
, h
->root
.root
.string
);
1120 if (old_tls_type
> tls_type
)
1121 tls_type
= old_tls_type
;
1124 if (old_tls_type
!= tls_type
)
1127 elf_s390_hash_entry (h
)->tls_type
= tls_type
;
1129 elf_s390_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1132 if (r_type
!= R_390_TLS_IE64
)
1136 case R_390_TLS_LE64
:
1137 /* For static linking and executables this reloc will be
1138 calculated at linktime otherwise a TLS_TPOFF runtime
1139 reloc will be generated. */
1140 if (r_type
== R_390_TLS_LE64
&& bfd_link_pie (info
))
1143 if (!bfd_link_pic (info
))
1145 info
->flags
|= DF_STATIC_TLS
;
1159 if (h
!= NULL
&& bfd_link_executable (info
))
1161 /* If this reloc is in a read-only section, we might
1162 need a copy reloc. We can't check reliably at this
1163 stage whether the section is read-only, as input
1164 sections have not yet been mapped to output sections.
1165 Tentatively set the flag for now, and correct in
1166 adjust_dynamic_symbol. */
1169 if (!bfd_link_pic (info
))
1171 /* We may need a .plt entry if the function this reloc
1172 refers to is in a shared lib. */
1173 h
->plt
.refcount
+= 1;
1177 /* If we are creating a shared library, and this is a reloc
1178 against a global symbol, or a non PC relative reloc
1179 against a local symbol, then we need to copy the reloc
1180 into the shared library. However, if we are linking with
1181 -Bsymbolic, we do not need to copy a reloc against a
1182 global symbol which is defined in an object we are
1183 including in the link (i.e., DEF_REGULAR is set). At
1184 this point we have not seen all the input files, so it is
1185 possible that DEF_REGULAR is not set now but will be set
1186 later (it is never cleared). In case of a weak definition,
1187 DEF_REGULAR may be cleared later by a strong definition in
1188 a shared library. We account for that possibility below by
1189 storing information in the relocs_copied field of the hash
1190 table entry. A similar situation occurs when creating
1191 shared libraries and symbol visibility changes render the
1194 If on the other hand, we are creating an executable, we
1195 may need to keep relocations for symbols satisfied by a
1196 dynamic library if we manage to avoid copy relocs for the
1198 if ((bfd_link_pic (info
)
1199 && (sec
->flags
& SEC_ALLOC
) != 0
1200 && ((ELF64_R_TYPE (rel
->r_info
) != R_390_PC16
1201 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC12DBL
1202 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC16DBL
1203 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC24DBL
1204 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32
1205 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32DBL
1206 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC64
)
1208 && (! SYMBOLIC_BIND (info
, h
)
1209 || h
->root
.type
== bfd_link_hash_defweak
1210 || !h
->def_regular
))))
1211 || (ELIMINATE_COPY_RELOCS
1212 && !bfd_link_pic (info
)
1213 && (sec
->flags
& SEC_ALLOC
) != 0
1215 && (h
->root
.type
== bfd_link_hash_defweak
1216 || !h
->def_regular
)))
1218 struct elf_dyn_relocs
*p
;
1219 struct elf_dyn_relocs
**head
;
1221 /* We must copy these reloc types into the output file.
1222 Create a reloc section in dynobj and make room for
1226 if (htab
->elf
.dynobj
== NULL
)
1227 htab
->elf
.dynobj
= abfd
;
1229 sreloc
= _bfd_elf_make_dynamic_reloc_section
1230 (sec
, htab
->elf
.dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1236 /* If this is a global symbol, we count the number of
1237 relocations we need for this symbol. */
1240 head
= &h
->dyn_relocs
;
1244 /* Track dynamic relocs needed for local syms too.
1245 We really need local syms available to do this
1250 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1255 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1259 vpp
= &elf_section_data (s
)->local_dynrel
;
1260 head
= (struct elf_dyn_relocs
**) vpp
;
1264 if (p
== NULL
|| p
->sec
!= sec
)
1266 size_t amt
= sizeof *p
;
1267 p
= ((struct elf_dyn_relocs
*)
1268 bfd_alloc (htab
->elf
.dynobj
, amt
));
1279 if (ELF64_R_TYPE (rel
->r_info
) == R_390_PC16
1280 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC12DBL
1281 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1282 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1283 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32
1284 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32DBL
1285 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC64
)
1290 /* This relocation describes the C++ object vtable hierarchy.
1291 Reconstruct it for later use during GC. */
1292 case R_390_GNU_VTINHERIT
:
1293 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1297 /* This relocation describes which C++ vtable entries are actually
1298 used. Record for later use during GC. */
1299 case R_390_GNU_VTENTRY
:
1300 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1312 /* Return the section that should be marked against GC for a given
1316 elf_s390_gc_mark_hook (asection
*sec
,
1317 struct bfd_link_info
*info
,
1318 Elf_Internal_Rela
*rel
,
1319 struct elf_link_hash_entry
*h
,
1320 Elf_Internal_Sym
*sym
)
1323 switch (ELF64_R_TYPE (rel
->r_info
))
1325 case R_390_GNU_VTINHERIT
:
1326 case R_390_GNU_VTENTRY
:
1330 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1333 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1334 entry but we found we will not create any. Called when we find we will
1335 not have any PLT for this symbol, by for example
1336 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1337 or elf_s390_size_dynamic_sections if no dynamic sections will be
1338 created (we're only linking static objects). */
1341 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry
*h
)
1343 if (h
->elf
.root
.type
== bfd_link_hash_warning
)
1344 h
= (struct elf_s390_link_hash_entry
*) h
->elf
.root
.u
.i
.link
;
1346 if (h
->gotplt_refcount
<= 0)
1349 /* We simply add the number of gotplt references to the number
1350 * of got references for this symbol. */
1351 h
->elf
.got
.refcount
+= h
->gotplt_refcount
;
1352 h
->gotplt_refcount
= -1;
1355 /* Find dynamic relocs for H that apply to read-only sections. */
1358 readonly_dynrelocs (struct elf_link_hash_entry
*h
)
1360 struct elf_dyn_relocs
*p
;
1362 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1364 asection
*s
= p
->sec
->output_section
;
1366 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1372 /* Adjust a symbol defined by a dynamic object and referenced by a
1373 regular object. The current definition is in some section of the
1374 dynamic object, but we're not including those sections. We have to
1375 change the definition to something the rest of the link can
1379 elf_s390_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1380 struct elf_link_hash_entry
*h
)
1382 struct elf_s390_link_hash_table
*htab
;
1385 /* STT_GNU_IFUNC symbol must go through PLT. */
1386 if (s390_is_ifunc_symbol_p (h
))
1388 /* All local STT_GNU_IFUNC references must be treated as local
1389 calls via local PLT. */
1390 if (h
->ref_regular
&& SYMBOL_CALLS_LOCAL (info
, h
))
1392 bfd_size_type pc_count
= 0, count
= 0;
1393 struct elf_dyn_relocs
**pp
;
1394 struct elf_dyn_relocs
*p
;
1396 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
; )
1398 pc_count
+= p
->pc_count
;
1399 p
->count
-= p
->pc_count
;
1408 if (pc_count
|| count
)
1412 if (h
->plt
.refcount
<= 0)
1413 h
->plt
.refcount
= 1;
1415 h
->plt
.refcount
+= 1;
1419 if (h
->plt
.refcount
<= 0)
1421 h
->plt
.offset
= (bfd_vma
) -1;
1427 /* If this is a function, put it in the procedure linkage table. We
1428 will fill in the contents of the procedure linkage table later
1429 (although we could actually do it here). */
1430 if (h
->type
== STT_FUNC
1433 if (h
->plt
.refcount
<= 0
1434 || SYMBOL_CALLS_LOCAL (info
, h
)
1435 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1437 /* This case can occur if we saw a PLT32 reloc in an input
1438 file, but the symbol was never referred to by a dynamic
1439 object, or if all references were garbage collected. In
1440 such a case, we don't actually need to build a procedure
1441 linkage table, and we can just do a PC32 reloc instead. */
1442 h
->plt
.offset
= (bfd_vma
) -1;
1444 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1450 /* It's possible that we incorrectly decided a .plt reloc was
1451 needed for an R_390_PC32 reloc to a non-function sym in
1452 check_relocs. We can't decide accurately between function and
1453 non-function syms in check-relocs; Objects loaded later in
1454 the link may change h->type. So fix it now. */
1455 h
->plt
.offset
= (bfd_vma
) -1;
1457 /* If this is a weak symbol, and there is a real definition, the
1458 processor independent code will have arranged for us to see the
1459 real definition first, and we can just use the same value. */
1460 if (h
->is_weakalias
)
1462 struct elf_link_hash_entry
*def
= weakdef (h
);
1463 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
1464 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
1465 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
1466 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1467 h
->non_got_ref
= def
->non_got_ref
;
1471 /* This is a reference to a symbol defined by a dynamic object which
1472 is not a function. */
1474 /* If we are creating a shared library, we must presume that the
1475 only references to the symbol are via the global offset table.
1476 For such cases we need not do anything here; the relocations will
1477 be handled correctly by relocate_section. */
1478 if (bfd_link_pic (info
))
1481 /* If there are no references to this symbol that do not use the
1482 GOT, we don't need to generate a copy reloc. */
1483 if (!h
->non_got_ref
)
1486 /* If -z nocopyreloc was given, we won't generate them either. */
1487 if (info
->nocopyreloc
)
1493 /* If we don't find any dynamic relocs in read-only sections, then
1494 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1495 if (ELIMINATE_COPY_RELOCS
&& !readonly_dynrelocs (h
))
1501 /* We must allocate the symbol in our .dynbss section, which will
1502 become part of the .bss section of the executable. There will be
1503 an entry for this symbol in the .dynsym section. The dynamic
1504 object will contain position independent code, so all references
1505 from the dynamic object to this symbol will go through the global
1506 offset table. The dynamic linker will use the .dynsym entry to
1507 determine the address it must put in the global offset table, so
1508 both the dynamic object and the regular object will refer to the
1509 same memory location for the variable. */
1511 htab
= elf_s390_hash_table (info
);
1515 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1516 copy the initial value out of the dynamic object and into the
1517 runtime process image. */
1518 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
1520 s
= htab
->elf
.sdynrelro
;
1521 srel
= htab
->elf
.sreldynrelro
;
1525 s
= htab
->elf
.sdynbss
;
1526 srel
= htab
->elf
.srelbss
;
1528 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1530 srel
->size
+= sizeof (Elf64_External_Rela
);
1534 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
1537 /* Allocate space in .plt, .got and associated reloc sections for
1541 allocate_dynrelocs (struct elf_link_hash_entry
*h
,
1544 struct bfd_link_info
*info
;
1545 struct elf_s390_link_hash_table
*htab
;
1546 struct elf_dyn_relocs
*p
;
1548 if (h
->root
.type
== bfd_link_hash_indirect
)
1551 info
= (struct bfd_link_info
*) inf
;
1552 htab
= elf_s390_hash_table (info
);
1556 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1557 here if it is defined and referenced in a non-shared object. */
1558 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
1559 return s390_elf_allocate_ifunc_dyn_relocs (info
, h
);
1560 else if (htab
->elf
.dynamic_sections_created
1561 && h
->plt
.refcount
> 0)
1563 /* Make sure this symbol is output as a dynamic symbol.
1564 Undefined weak syms won't yet be marked as dynamic. */
1565 if (h
->dynindx
== -1
1566 && !h
->forced_local
)
1568 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1572 if (bfd_link_pic (info
)
1573 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1575 asection
*s
= htab
->elf
.splt
;
1577 /* If this is the first .plt entry, make room for the special
1580 s
->size
+= PLT_FIRST_ENTRY_SIZE
;
1582 h
->plt
.offset
= s
->size
;
1584 /* If this symbol is not defined in a regular file, and we are
1585 not generating a shared library, then set the symbol to this
1586 location in the .plt. This is required to make function
1587 pointers compare as equal between the normal executable and
1588 the shared library. */
1589 if (! bfd_link_pic (info
)
1592 h
->root
.u
.def
.section
= s
;
1593 h
->root
.u
.def
.value
= h
->plt
.offset
;
1596 /* Make room for this entry. */
1597 s
->size
+= PLT_ENTRY_SIZE
;
1599 /* We also need to make an entry in the .got.plt section. */
1600 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
1602 /* We also need to make an entry in the .rela.plt section. */
1603 htab
->elf
.srelplt
->size
+= sizeof (Elf64_External_Rela
);
1607 h
->plt
.offset
= (bfd_vma
) -1;
1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1614 h
->plt
.offset
= (bfd_vma
) -1;
1616 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1619 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1620 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1621 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1622 we can save the dynamic TLS relocation. */
1623 if (h
->got
.refcount
> 0
1624 && !bfd_link_pic (info
)
1626 && elf_s390_hash_entry(h
)->tls_type
>= GOT_TLS_IE
)
1628 if (elf_s390_hash_entry(h
)->tls_type
== GOT_TLS_IE_NLT
)
1629 /* For the GOTIE access without a literal pool entry the offset has
1630 to be stored somewhere. The immediate value in the instruction
1631 is not bit enough so the value is stored in the got. */
1633 h
->got
.offset
= htab
->elf
.sgot
->size
;
1634 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
1637 h
->got
.offset
= (bfd_vma
) -1;
1639 else if (h
->got
.refcount
> 0)
1643 int tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1645 /* Make sure this symbol is output as a dynamic symbol.
1646 Undefined weak syms won't yet be marked as dynamic. */
1647 if (h
->dynindx
== -1
1648 && !h
->forced_local
)
1650 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1655 h
->got
.offset
= s
->size
;
1656 s
->size
+= GOT_ENTRY_SIZE
;
1657 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1658 if (tls_type
== GOT_TLS_GD
)
1659 s
->size
+= GOT_ENTRY_SIZE
;
1660 dyn
= htab
->elf
.dynamic_sections_created
;
1661 /* R_390_TLS_IE64 needs one dynamic relocation,
1662 R_390_TLS_GD64 needs one if local symbol and two if global. */
1663 if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1664 || tls_type
>= GOT_TLS_IE
)
1665 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1666 else if (tls_type
== GOT_TLS_GD
)
1667 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf64_External_Rela
);
1668 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
)
1669 && (bfd_link_pic (info
)
1670 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1671 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1674 h
->got
.offset
= (bfd_vma
) -1;
1676 if (h
->dyn_relocs
== NULL
)
1679 /* In the shared -Bsymbolic case, discard space allocated for
1680 dynamic pc-relative relocs against symbols which turn out to be
1681 defined in regular objects. For the normal shared case, discard
1682 space for pc-relative relocs that have become local due to symbol
1683 visibility changes. */
1685 if (bfd_link_pic (info
))
1687 if (SYMBOL_CALLS_LOCAL (info
, h
))
1689 struct elf_dyn_relocs
**pp
;
1691 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
; )
1693 p
->count
-= p
->pc_count
;
1702 /* Also discard relocs on undefined weak syms with non-default
1704 if (h
->dyn_relocs
!= NULL
1705 && h
->root
.type
== bfd_link_hash_undefweak
)
1707 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1708 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1709 h
->dyn_relocs
= NULL
;
1711 /* Make sure undefined weak symbols are output as a dynamic
1713 else if (h
->dynindx
== -1
1714 && !h
->forced_local
)
1716 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1721 else if (ELIMINATE_COPY_RELOCS
)
1723 /* For the non-shared case, discard space for relocs against
1724 symbols which turn out to need copy relocs or are not
1730 || (htab
->elf
.dynamic_sections_created
1731 && (h
->root
.type
== bfd_link_hash_undefweak
1732 || h
->root
.type
== bfd_link_hash_undefined
))))
1734 /* Make sure this symbol is output as a dynamic symbol.
1735 Undefined weak syms won't yet be marked as dynamic. */
1736 if (h
->dynindx
== -1
1737 && !h
->forced_local
)
1739 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1743 /* If that succeeded, we know we'll be keeping all the
1745 if (h
->dynindx
!= -1)
1749 h
->dyn_relocs
= NULL
;
1754 /* Finally, allocate space. */
1755 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1757 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1758 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1764 /* Set DF_TEXTREL if we find any dynamic relocs that apply to
1765 read-only sections. */
1768 maybe_set_textrel (struct elf_link_hash_entry
*h
, void *info_p
)
1772 if (h
->root
.type
== bfd_link_hash_indirect
)
1775 sec
= readonly_dynrelocs (h
);
1778 struct bfd_link_info
*info
= (struct bfd_link_info
*) info_p
;
1780 info
->flags
|= DF_TEXTREL
;
1781 info
->callbacks
->minfo
1782 (_("%pB: dynamic relocation against `%pT' in read-only section `%pA'\n"),
1783 sec
->owner
, h
->root
.root
.string
, sec
);
1785 /* Not an error, just cut short the traversal. */
1791 /* Set the sizes of the dynamic sections. */
1794 elf_s390_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1795 struct bfd_link_info
*info
)
1797 struct elf_s390_link_hash_table
*htab
;
1803 htab
= elf_s390_hash_table (info
);
1807 dynobj
= htab
->elf
.dynobj
;
1811 if (htab
->elf
.dynamic_sections_created
)
1813 /* Set the contents of the .interp section to the interpreter. */
1814 if (bfd_link_executable (info
) && !info
->nointerp
)
1816 s
= bfd_get_linker_section (dynobj
, ".interp");
1819 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1820 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1824 if (htab
->elf
.sgot
&& s390_gotplt_after_got_p (info
))
1826 /* _bfd_elf_create_got_section adds the got header size always
1827 to .got.plt but we need it in .got if this section comes
1829 htab
->elf
.sgot
->size
+= 3 * GOT_ENTRY_SIZE
;
1830 htab
->elf
.sgotplt
->size
-= 3 * GOT_ENTRY_SIZE
;
1832 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1833 instead of .got.plt. */
1834 htab
->elf
.hgot
->root
.u
.def
.section
= htab
->elf
.sgot
;
1835 htab
->elf
.hgot
->root
.u
.def
.value
= 0;
1838 /* Set up .got offsets for local syms, and space for local dynamic
1840 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
1842 bfd_signed_vma
*local_got
;
1843 bfd_signed_vma
*end_local_got
;
1844 char *local_tls_type
;
1845 bfd_size_type locsymcount
;
1846 Elf_Internal_Shdr
*symtab_hdr
;
1848 struct plt_entry
*local_plt
;
1851 if (! is_s390_elf (ibfd
))
1854 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1856 struct elf_dyn_relocs
*p
;
1858 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
1860 if (!bfd_is_abs_section (p
->sec
)
1861 && bfd_is_abs_section (p
->sec
->output_section
))
1863 /* Input section has been discarded, either because
1864 it is a copy of a linkonce section or due to
1865 linker script /DISCARD/, so we'll be discarding
1868 else if (p
->count
!= 0)
1870 srela
= elf_section_data (p
->sec
)->sreloc
;
1871 srela
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1872 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1873 info
->flags
|= DF_TEXTREL
;
1878 local_got
= elf_local_got_refcounts (ibfd
);
1882 symtab_hdr
= &elf_symtab_hdr (ibfd
);
1883 locsymcount
= symtab_hdr
->sh_info
;
1884 end_local_got
= local_got
+ locsymcount
;
1885 local_tls_type
= elf_s390_local_got_tls_type (ibfd
);
1887 srela
= htab
->elf
.srelgot
;
1888 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1892 *local_got
= s
->size
;
1893 s
->size
+= GOT_ENTRY_SIZE
;
1894 if (*local_tls_type
== GOT_TLS_GD
)
1895 s
->size
+= GOT_ENTRY_SIZE
;
1896 if (bfd_link_pic (info
))
1897 srela
->size
+= sizeof (Elf64_External_Rela
);
1900 *local_got
= (bfd_vma
) -1;
1903 local_plt
= elf_s390_local_plt (ibfd
);
1904 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
1906 if (local_plt
[i
].plt
.refcount
> 0)
1908 local_plt
[i
].plt
.offset
= htab
->elf
.iplt
->size
;
1909 htab
->elf
.iplt
->size
+= PLT_ENTRY_SIZE
;
1910 htab
->elf
.igotplt
->size
+= GOT_ENTRY_SIZE
;
1911 htab
->elf
.irelplt
->size
+= sizeof (Elf64_External_Rela
);
1914 local_plt
[i
].plt
.offset
= (bfd_vma
) -1;
1918 if (htab
->tls_ldm_got
.refcount
> 0)
1920 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1922 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
1923 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
1924 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1927 htab
->tls_ldm_got
.offset
= -1;
1929 /* Allocate global sym .plt and .got entries, and space for global
1930 sym dynamic relocs. */
1931 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, info
);
1933 /* We now have determined the sizes of the various dynamic sections.
1934 Allocate memory for them. */
1936 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1938 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1941 if (s
== htab
->elf
.splt
1942 || s
== htab
->elf
.sgot
1943 || s
== htab
->elf
.sgotplt
1944 || s
== htab
->elf
.sdynbss
1945 || s
== htab
->elf
.sdynrelro
1946 || s
== htab
->elf
.iplt
1947 || s
== htab
->elf
.igotplt
1948 || s
== htab
->irelifunc
)
1950 /* Strip this section if we don't need it; see the
1953 else if (CONST_STRNEQ (bfd_section_name (s
), ".rela"))
1955 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
1958 /* We use the reloc_count field as a counter if we need
1959 to copy relocs into the output file. */
1964 /* It's not one of our sections, so don't allocate space. */
1970 /* If we don't need this section, strip it from the
1971 output file. This is to handle .rela.bss and
1972 .rela.plt. We must create it in
1973 create_dynamic_sections, because it must be created
1974 before the linker maps input sections to output
1975 sections. The linker does that before
1976 adjust_dynamic_symbol is called, and it is that
1977 function which decides whether anything needs to go
1978 into these sections. */
1980 s
->flags
|= SEC_EXCLUDE
;
1984 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1987 /* Allocate memory for the section contents. We use bfd_zalloc
1988 here in case unused entries are not reclaimed before the
1989 section's contents are written out. This should not happen,
1990 but this way if it does, we get a R_390_NONE reloc instead
1992 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
1993 if (s
->contents
== NULL
)
1997 if (htab
->elf
.dynamic_sections_created
)
1999 /* Add some entries to the .dynamic section. We fill in the
2000 values later, in elf_s390_finish_dynamic_sections, but we
2001 must add the entries now so that we get the correct size for
2002 the .dynamic section. The DT_DEBUG entry is filled in by the
2003 dynamic linker and used by the debugger. */
2004 #define add_dynamic_entry(TAG, VAL) \
2005 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2007 if (bfd_link_executable (info
))
2009 if (!add_dynamic_entry (DT_DEBUG
, 0))
2013 if (htab
->elf
.splt
->size
!= 0)
2015 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2016 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2017 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2018 || !add_dynamic_entry (DT_JMPREL
, 0))
2024 if (!add_dynamic_entry (DT_RELA
, 0)
2025 || !add_dynamic_entry (DT_RELASZ
, 0)
2026 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2029 /* If any dynamic relocs apply to a read-only section,
2030 then we need a DT_TEXTREL entry. */
2031 if ((info
->flags
& DF_TEXTREL
) == 0)
2032 elf_link_hash_traverse (&htab
->elf
, maybe_set_textrel
, info
);
2034 if ((info
->flags
& DF_TEXTREL
) != 0)
2036 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2041 #undef add_dynamic_entry
2046 /* Return the base VMA address which should be subtracted from real addresses
2047 when resolving @dtpoff relocation.
2048 This is PT_TLS segment p_vaddr. */
2051 dtpoff_base (struct bfd_link_info
*info
)
2053 /* If tls_sec is NULL, we should have signalled an error already. */
2054 if (elf_hash_table (info
)->tls_sec
== NULL
)
2056 return elf_hash_table (info
)->tls_sec
->vma
;
2059 /* Return the relocation value for @tpoff relocation
2060 if STT_TLS virtual address is ADDRESS. */
2063 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2065 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2067 /* If tls_sec is NULL, we should have signalled an error already. */
2068 if (htab
->tls_sec
== NULL
)
2070 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2073 /* Complain if TLS instruction relocation is against an invalid
2077 invalid_tls_insn (bfd
*input_bfd
,
2078 asection
*input_section
,
2079 Elf_Internal_Rela
*rel
)
2081 reloc_howto_type
*howto
;
2083 howto
= elf_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
2085 /* xgettext:c-format */
2086 (_("%pB(%pA+%#" PRIx64
"): invalid instruction for TLS relocation %s"),
2089 (uint64_t) rel
->r_offset
,
2091 bfd_set_error (bfd_error_bad_value
);
2094 /* Relocate a 390 ELF section. */
2097 elf_s390_relocate_section (bfd
*output_bfd
,
2098 struct bfd_link_info
*info
,
2100 asection
*input_section
,
2102 Elf_Internal_Rela
*relocs
,
2103 Elf_Internal_Sym
*local_syms
,
2104 asection
**local_sections
)
2106 struct elf_s390_link_hash_table
*htab
;
2107 Elf_Internal_Shdr
*symtab_hdr
;
2108 struct elf_link_hash_entry
**sym_hashes
;
2109 bfd_vma
*local_got_offsets
;
2110 Elf_Internal_Rela
*rel
;
2111 Elf_Internal_Rela
*relend
;
2113 if (!is_s390_elf (input_bfd
))
2115 bfd_set_error (bfd_error_wrong_format
);
2119 htab
= elf_s390_hash_table (info
);
2123 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2124 sym_hashes
= elf_sym_hashes (input_bfd
);
2125 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2128 relend
= relocs
+ input_section
->reloc_count
;
2129 for (; rel
< relend
; rel
++)
2131 unsigned int r_type
;
2132 reloc_howto_type
*howto
;
2133 unsigned long r_symndx
;
2134 struct elf_link_hash_entry
*h
;
2135 Elf_Internal_Sym
*sym
;
2139 bfd_boolean unresolved_reloc
;
2140 bfd_reloc_status_type r
;
2142 bfd_boolean resolved_to_zero
;
2144 r_type
= ELF64_R_TYPE (rel
->r_info
);
2145 if (r_type
== (int) R_390_GNU_VTINHERIT
2146 || r_type
== (int) R_390_GNU_VTENTRY
)
2148 if (r_type
>= (int) R_390_max
)
2150 bfd_set_error (bfd_error_bad_value
);
2154 howto
= elf_howto_table
+ r_type
;
2155 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2160 unresolved_reloc
= FALSE
;
2161 if (r_symndx
< symtab_hdr
->sh_info
)
2163 sym
= local_syms
+ r_symndx
;
2164 sec
= local_sections
[r_symndx
];
2166 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2168 struct plt_entry
*local_plt
= elf_s390_local_plt (input_bfd
);
2169 if (local_plt
== NULL
)
2172 /* Address of the PLT slot. */
2173 relocation
= (htab
->elf
.iplt
->output_section
->vma
2174 + htab
->elf
.iplt
->output_offset
2175 + local_plt
[r_symndx
].plt
.offset
);
2179 case R_390_PLTOFF16
:
2180 case R_390_PLTOFF32
:
2181 case R_390_PLTOFF64
:
2182 relocation
-= s390_got_pointer (info
);
2184 case R_390_GOTPLT12
:
2185 case R_390_GOTPLT16
:
2186 case R_390_GOTPLT20
:
2187 case R_390_GOTPLT32
:
2188 case R_390_GOTPLT64
:
2189 case R_390_GOTPLTENT
:
2197 /* Write the PLT slot address into the GOT slot. */
2198 bfd_put_64 (output_bfd
, relocation
,
2199 htab
->elf
.sgot
->contents
+
2200 local_got_offsets
[r_symndx
]);
2201 relocation
= (local_got_offsets
[r_symndx
] +
2202 s390_got_offset (info
));
2204 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2205 relocation
+= s390_got_pointer (info
);
2211 /* The output section is needed later in
2212 finish_dynamic_section when creating the dynamic
2214 local_plt
[r_symndx
].sec
= sec
;
2218 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2222 bfd_boolean warned ATTRIBUTE_UNUSED
;
2223 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2225 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2226 r_symndx
, symtab_hdr
, sym_hashes
,
2228 unresolved_reloc
, warned
, ignored
);
2231 if (sec
!= NULL
&& discarded_section (sec
))
2232 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2233 rel
, 1, relend
, howto
, 0, contents
);
2235 if (bfd_link_relocatable (info
))
2238 resolved_to_zero
= (h
!= NULL
2239 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
2243 case R_390_GOTPLT12
:
2244 case R_390_GOTPLT16
:
2245 case R_390_GOTPLT20
:
2246 case R_390_GOTPLT32
:
2247 case R_390_GOTPLT64
:
2248 case R_390_GOTPLTENT
:
2249 /* There are three cases for a GOTPLT relocation. 1) The
2250 relocation is against the jump slot entry of a plt that
2251 will get emitted to the output file. 2) The relocation
2252 is against the jump slot of a plt entry that has been
2253 removed. elf_s390_adjust_gotplt has created a GOT entry
2254 as replacement. 3) The relocation is against a local symbol.
2255 Cases 2) and 3) are the same as the GOT relocation code
2256 so we just have to test for case 1 and fall through for
2258 if (h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
2262 if (s390_is_ifunc_symbol_p (h
))
2264 /* Entry indices of .iplt and .igot.plt match
2265 1:1. No magic PLT first entry here. */
2266 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2267 relocation
= (plt_index
* GOT_ENTRY_SIZE
2268 + s390_gotplt_offset (info
)
2269 + htab
->elf
.igotplt
->output_offset
);
2273 plt_index
= ((h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
)
2276 relocation
= (plt_index
* GOT_ENTRY_SIZE
2277 + s390_gotplt_offset (info
));
2279 if (r_type
== R_390_GOTPLTENT
)
2280 relocation
+= s390_got_pointer (info
);
2281 unresolved_reloc
= FALSE
;
2292 /* Relocation is to the entry for this symbol in the global
2294 if (htab
->elf
.sgot
== NULL
)
2301 off
= h
->got
.offset
;
2302 dyn
= htab
->elf
.dynamic_sections_created
;
2304 if (s390_is_ifunc_symbol_p (h
))
2306 BFD_ASSERT (h
->plt
.offset
!= (bfd_vma
) -1);
2307 if (off
== (bfd_vma
)-1)
2309 /* No explicit GOT usage so redirect to the
2311 relocation
= (s390_gotplt_offset (info
)
2312 + htab
->elf
.igotplt
->output_offset
2313 + (h
->plt
.offset
/ PLT_ENTRY_SIZE
2316 /* For @GOTENT the relocation is against the offset between
2317 the instruction and the symbols entry in the GOT and not
2318 between the start of the GOT and the symbols entry. We
2319 add the vma of the GOT to get the correct value. */
2320 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2321 relocation
+= s390_got_pointer (info
);
2327 /* Explicit GOT slots must contain the address
2328 of the PLT slot. This will be handled in
2329 finish_dynamic_symbol. */
2332 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2333 bfd_link_pic (info
),
2335 || (bfd_link_pic (info
)
2336 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2337 || resolved_to_zero
)
2339 Elf_Internal_Sym
*isym
;
2342 /* This is actually a static link, or it is a
2343 -Bsymbolic link and the symbol is defined
2344 locally, or the symbol was forced to be local
2345 because of a version file. We must initialize
2346 this entry in the global offset table. Since the
2347 offset must always be a multiple of 2, we use the
2348 least significant bit to record whether we have
2349 initialized it already.
2351 When doing a dynamic link, we create a .rel.got
2352 relocation entry to initialize the value. This
2353 is done in the finish_dynamic_symbol routine. */
2358 bfd_put_64 (output_bfd
, relocation
,
2359 htab
->elf
.sgot
->contents
+ off
);
2363 /* When turning a GOT slot dereference into a direct
2364 reference using larl we have to make sure that
2365 the symbol is 1. properly aligned and 2. it is no
2366 ABS symbol or will become one. */
2368 && bfd_link_pic (info
)
2369 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2370 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2371 && ((r_type
== R_390_GOTENT
2372 && (bfd_get_16 (input_bfd
,
2373 contents
+ rel
->r_offset
- 2)
2374 & 0xff0f) == 0xc408)
2375 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2376 || (r_type
== R_390_GOT20
2377 && (bfd_get_32 (input_bfd
,
2378 contents
+ rel
->r_offset
- 2)
2379 & 0xff00f000) == 0xe300c000
2380 && bfd_get_8 (input_bfd
,
2381 contents
+ rel
->r_offset
+ 3) == 0x04))
2382 && (isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2383 input_bfd
, r_symndx
))
2384 && isym
->st_shndx
!= SHN_ABS
2385 && h
!= htab
->elf
.hdynamic
2386 && h
!= htab
->elf
.hgot
2387 && h
!= htab
->elf
.hplt
2388 && !(isym
->st_value
& 1)
2389 && (sym_sec
= bfd_section_from_elf_index (input_bfd
,
2391 && sym_sec
->alignment_power
)
2393 unsigned short new_insn
=
2394 (0xc000 | (bfd_get_8 (input_bfd
,
2395 contents
+ rel
->r_offset
- 1) & 0xf0));
2396 bfd_put_16 (output_bfd
, new_insn
,
2397 contents
+ rel
->r_offset
- 2);
2398 r_type
= R_390_PC32DBL
;
2400 howto
= elf_howto_table
+ r_type
;
2401 relocation
= h
->root
.u
.def
.value
2402 + h
->root
.u
.def
.section
->output_section
->vma
2403 + h
->root
.u
.def
.section
->output_offset
;
2408 unresolved_reloc
= FALSE
;
2412 if (local_got_offsets
== NULL
)
2415 off
= local_got_offsets
[r_symndx
];
2417 /* The offset must always be a multiple of 8. We use
2418 the least significant bit to record whether we have
2419 already generated the necessary reloc. */
2424 bfd_put_64 (output_bfd
, relocation
,
2425 htab
->elf
.sgot
->contents
+ off
);
2427 if (bfd_link_pic (info
))
2430 Elf_Internal_Rela outrel
;
2433 s
= htab
->elf
.srelgot
;
2437 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2438 + htab
->elf
.sgot
->output_offset
2440 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2441 outrel
.r_addend
= relocation
;
2443 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2444 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2447 local_got_offsets
[r_symndx
] |= 1;
2451 if (off
>= (bfd_vma
) -2)
2454 relocation
= s390_got_offset (info
) + off
;
2456 /* For @GOTENT the relocation is against the offset between
2457 the instruction and the symbols entry in the GOT and not
2458 between the start of the GOT and the symbols entry. We
2459 add the vma of the GOT to get the correct value. */
2460 if ( r_type
== R_390_GOTENT
2461 || r_type
== R_390_GOTPLTENT
)
2462 relocation
+= s390_got_pointer (info
);
2466 case R_390_GOTOFF16
:
2467 case R_390_GOTOFF32
:
2468 case R_390_GOTOFF64
:
2469 /* Relocation is relative to the start of the global offset
2473 && s390_is_ifunc_symbol_p (h
)
2475 && !bfd_link_executable (info
))
2477 relocation
= (htab
->elf
.iplt
->output_section
->vma
2478 + htab
->elf
.iplt
->output_offset
2480 - s390_got_pointer (info
));
2484 relocation
-= s390_got_pointer (info
);
2488 case R_390_GOTPCDBL
:
2489 /* Use global offset table as symbol value. */
2490 relocation
= s390_got_pointer (info
);
2491 unresolved_reloc
= FALSE
;
2494 case R_390_PLT12DBL
:
2495 case R_390_PLT16DBL
:
2496 case R_390_PLT24DBL
:
2498 case R_390_PLT32DBL
:
2500 /* Relocation is to the entry for this symbol in the
2501 procedure linkage table. */
2503 /* Resolve a PLT32 reloc against a local symbol directly,
2504 without using the procedure linkage table. */
2508 if (h
->plt
.offset
== (bfd_vma
) -1
2509 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2511 /* We didn't make a PLT entry for this symbol. This
2512 happens when statically linking PIC code, or when
2513 using -Bsymbolic. */
2516 if (s390_is_ifunc_symbol_p (h
))
2517 relocation
= (htab
->elf
.iplt
->output_section
->vma
2518 + htab
->elf
.iplt
->output_offset
2521 relocation
= (htab
->elf
.splt
->output_section
->vma
2522 + htab
->elf
.splt
->output_offset
2524 unresolved_reloc
= FALSE
;
2527 case R_390_PLTOFF16
:
2528 case R_390_PLTOFF32
:
2529 case R_390_PLTOFF64
:
2530 /* Relocation is to the entry for this symbol in the
2531 procedure linkage table relative to the start of the GOT. */
2533 /* For local symbols or if we didn't make a PLT entry for
2534 this symbol resolve the symbol directly. */
2536 || h
->plt
.offset
== (bfd_vma
) -1
2537 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2539 relocation
-= s390_got_pointer (info
);
2543 if (s390_is_ifunc_symbol_p (h
))
2544 relocation
= (htab
->elf
.iplt
->output_section
->vma
2545 + htab
->elf
.iplt
->output_offset
2547 - s390_got_pointer (info
));
2549 relocation
= (htab
->elf
.splt
->output_section
->vma
2550 + htab
->elf
.splt
->output_offset
2552 - s390_got_pointer (info
));
2553 unresolved_reloc
= FALSE
;
2564 && bfd_link_pie (info
)
2567 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2568 "in shared library and accessed "
2570 "(rebuild file with -fPIC ?)"),
2571 input_bfd
, h
->root
.root
.string
);
2572 bfd_set_error (bfd_error_bad_value
);
2575 /* The target of these relocs are instruction operands
2576 residing in read-only sections. We cannot emit a runtime
2579 && s390_is_ifunc_symbol_p (h
)
2581 && bfd_link_pic (info
))
2583 relocation
= (htab
->elf
.iplt
->output_section
->vma
2584 + htab
->elf
.iplt
->output_offset
2595 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2599 && s390_is_ifunc_symbol_p (h
)
2602 if (!bfd_link_pic (info
))
2604 /* For a non-shared object the symbol will not
2605 change. Hence we can write the address of the
2606 target IPLT slot now. */
2607 relocation
= (htab
->elf
.iplt
->output_section
->vma
2608 + htab
->elf
.iplt
->output_offset
2614 /* For shared objects a runtime relocation is needed. */
2616 Elf_Internal_Rela outrel
;
2619 /* Need a dynamic relocation to get the real function
2621 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2625 if (outrel
.r_offset
== (bfd_vma
) -1
2626 || outrel
.r_offset
== (bfd_vma
) -2)
2629 outrel
.r_offset
+= (input_section
->output_section
->vma
2630 + input_section
->output_offset
);
2632 if (h
->dynindx
== -1
2634 || bfd_link_executable (info
))
2636 /* This symbol is resolved locally. */
2637 outrel
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
2638 outrel
.r_addend
= (h
->root
.u
.def
.value
2639 + h
->root
.u
.def
.section
->output_section
->vma
2640 + h
->root
.u
.def
.section
->output_offset
);
2644 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2645 outrel
.r_addend
= 0;
2648 sreloc
= htab
->elf
.irelifunc
;
2649 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2651 /* If this reloc is against an external symbol, we
2652 do not want to fiddle with the addend. Otherwise,
2653 we need to include the symbol value so that it
2654 becomes an addend for the dynamic reloc. For an
2655 internal symbol, we have updated addend. */
2660 if ((bfd_link_pic (info
)
2662 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2663 && !resolved_to_zero
)
2664 || h
->root
.type
!= bfd_link_hash_undefweak
)
2665 && ((r_type
!= R_390_PC16
2666 && r_type
!= R_390_PC12DBL
2667 && r_type
!= R_390_PC16DBL
2668 && r_type
!= R_390_PC24DBL
2669 && r_type
!= R_390_PC32
2670 && r_type
!= R_390_PC32DBL
2671 && r_type
!= R_390_PC64
)
2672 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2673 || (ELIMINATE_COPY_RELOCS
2674 && !bfd_link_pic (info
)
2680 || h
->root
.type
== bfd_link_hash_undefweak
2681 || h
->root
.type
== bfd_link_hash_undefined
)))
2683 Elf_Internal_Rela outrel
;
2684 bfd_boolean skip
, relocate
;
2688 /* When generating a shared object, these relocations
2689 are copied into the output file to be resolved at run
2695 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2697 if (outrel
.r_offset
== (bfd_vma
) -1)
2699 else if (outrel
.r_offset
== (bfd_vma
) -2)
2700 skip
= TRUE
, relocate
= TRUE
;
2702 outrel
.r_offset
+= (input_section
->output_section
->vma
2703 + input_section
->output_offset
);
2706 memset (&outrel
, 0, sizeof outrel
);
2709 && (r_type
== R_390_PC16
2710 || r_type
== R_390_PC12DBL
2711 || r_type
== R_390_PC16DBL
2712 || r_type
== R_390_PC24DBL
2713 || r_type
== R_390_PC32
2714 || r_type
== R_390_PC32DBL
2715 || r_type
== R_390_PC64
2716 || !bfd_link_pic (info
)
2717 || !SYMBOLIC_BIND (info
, h
)
2718 || !h
->def_regular
))
2720 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2721 outrel
.r_addend
= rel
->r_addend
;
2725 /* This symbol is local, or marked to become local. */
2726 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2727 if (r_type
== R_390_64
)
2730 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2736 if (bfd_is_abs_section (sec
))
2738 else if (sec
== NULL
|| sec
->owner
== NULL
)
2740 bfd_set_error(bfd_error_bad_value
);
2747 osec
= sec
->output_section
;
2748 sindx
= elf_section_data (osec
)->dynindx
;
2752 osec
= htab
->elf
.text_index_section
;
2753 sindx
= elf_section_data (osec
)->dynindx
;
2755 BFD_ASSERT (sindx
!= 0);
2757 /* We are turning this relocation into one
2758 against a section symbol, so subtract out
2759 the output section's address but not the
2760 offset of the input section in the output
2762 outrel
.r_addend
-= osec
->vma
;
2764 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
2768 sreloc
= elf_section_data (input_section
)->sreloc
;
2772 loc
= sreloc
->contents
;
2773 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2774 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2776 /* If this reloc is against an external symbol, we do
2777 not want to fiddle with the addend. Otherwise, we
2778 need to include the symbol value so that it becomes
2779 an addend for the dynamic reloc. */
2786 /* Relocations for tls literal pool entries. */
2787 case R_390_TLS_IE64
:
2788 if (bfd_link_pic (info
))
2790 Elf_Internal_Rela outrel
;
2794 outrel
.r_offset
= rel
->r_offset
2795 + input_section
->output_section
->vma
2796 + input_section
->output_offset
;
2797 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2798 sreloc
= elf_section_data (input_section
)->sreloc
;
2801 loc
= sreloc
->contents
;
2802 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2803 bfd_elf64_swap_reloc_out (output_bfd
, &outrel
, loc
);
2807 case R_390_TLS_GD64
:
2808 case R_390_TLS_GOTIE64
:
2809 r_type
= elf_s390_tls_transition (info
, r_type
, h
== NULL
);
2810 tls_type
= GOT_UNKNOWN
;
2811 if (h
== NULL
&& local_got_offsets
)
2812 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2815 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2816 if (!bfd_link_pic (info
) && h
->dynindx
== -1 && tls_type
>= GOT_TLS_IE
)
2817 r_type
= R_390_TLS_LE64
;
2819 if (r_type
== R_390_TLS_GD64
&& tls_type
>= GOT_TLS_IE
)
2820 r_type
= R_390_TLS_IE64
;
2822 if (r_type
== R_390_TLS_LE64
)
2824 /* This relocation gets optimized away by the local exec
2825 access optimization. */
2826 BFD_ASSERT (! unresolved_reloc
);
2827 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2828 contents
+ rel
->r_offset
);
2832 if (htab
->elf
.sgot
== NULL
)
2836 off
= h
->got
.offset
;
2839 if (local_got_offsets
== NULL
)
2842 off
= local_got_offsets
[r_symndx
];
2851 Elf_Internal_Rela outrel
;
2855 if (htab
->elf
.srelgot
== NULL
)
2858 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2859 + htab
->elf
.sgot
->output_offset
+ off
);
2861 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2862 if (r_type
== R_390_TLS_GD64
)
2863 dr_type
= R_390_TLS_DTPMOD
;
2865 dr_type
= R_390_TLS_TPOFF
;
2866 if (dr_type
== R_390_TLS_TPOFF
&& indx
== 0)
2867 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2869 outrel
.r_addend
= 0;
2870 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
2871 loc
= htab
->elf
.srelgot
->contents
;
2872 loc
+= htab
->elf
.srelgot
->reloc_count
++
2873 * sizeof (Elf64_External_Rela
);
2874 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2876 if (r_type
== R_390_TLS_GD64
)
2880 BFD_ASSERT (! unresolved_reloc
);
2881 bfd_put_64 (output_bfd
,
2882 relocation
- dtpoff_base (info
),
2883 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2887 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_DTPOFF
);
2888 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
2889 outrel
.r_addend
= 0;
2890 htab
->elf
.srelgot
->reloc_count
++;
2891 loc
+= sizeof (Elf64_External_Rela
);
2892 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2899 local_got_offsets
[r_symndx
] |= 1;
2902 if (off
>= (bfd_vma
) -2)
2904 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
2906 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2907 if (r_type
== R_390_TLS_IE64
|| r_type
== R_390_TLS_IEENT
)
2908 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2909 unresolved_reloc
= FALSE
;
2913 bfd_put_64 (output_bfd
, htab
->elf
.sgot
->output_offset
+ off
,
2914 contents
+ rel
->r_offset
);
2919 case R_390_TLS_GOTIE12
:
2920 case R_390_TLS_GOTIE20
:
2921 case R_390_TLS_IEENT
:
2924 if (local_got_offsets
== NULL
)
2926 off
= local_got_offsets
[r_symndx
];
2927 if (bfd_link_pic (info
))
2928 goto emit_tls_relocs
;
2932 off
= h
->got
.offset
;
2933 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2934 if (bfd_link_pic (info
) || h
->dynindx
!= -1 || tls_type
< GOT_TLS_IE
)
2935 goto emit_tls_relocs
;
2938 if (htab
->elf
.sgot
== NULL
)
2941 BFD_ASSERT (! unresolved_reloc
);
2942 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2943 htab
->elf
.sgot
->contents
+ off
);
2944 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2945 if (r_type
== R_390_TLS_IEENT
)
2946 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2947 unresolved_reloc
= FALSE
;
2950 case R_390_TLS_LDM64
:
2951 if (! bfd_link_pic (info
))
2952 /* The literal pool entry this relocation refers to gets ignored
2953 by the optimized code of the local exec model. Do nothing
2954 and the value will turn out zero. */
2957 if (htab
->elf
.sgot
== NULL
)
2960 off
= htab
->tls_ldm_got
.offset
;
2965 Elf_Internal_Rela outrel
;
2968 if (htab
->elf
.srelgot
== NULL
)
2971 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2972 + htab
->elf
.sgot
->output_offset
+ off
);
2974 bfd_put_64 (output_bfd
, 0,
2975 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2976 outrel
.r_info
= ELF64_R_INFO (0, R_390_TLS_DTPMOD
);
2977 outrel
.r_addend
= 0;
2978 loc
= htab
->elf
.srelgot
->contents
;
2979 loc
+= htab
->elf
.srelgot
->reloc_count
++
2980 * sizeof (Elf64_External_Rela
);
2981 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2982 htab
->tls_ldm_got
.offset
|= 1;
2984 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2985 unresolved_reloc
= FALSE
;
2988 case R_390_TLS_LE64
:
2989 if (bfd_link_dll (info
))
2991 /* Linking a shared library with non-fpic code requires
2992 a R_390_TLS_TPOFF relocation. */
2993 Elf_Internal_Rela outrel
;
2998 outrel
.r_offset
= rel
->r_offset
2999 + input_section
->output_section
->vma
3000 + input_section
->output_offset
;
3001 if (h
!= NULL
&& h
->dynindx
!= -1)
3005 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_TPOFF
);
3007 outrel
.r_addend
= relocation
- dtpoff_base (info
);
3009 outrel
.r_addend
= 0;
3010 sreloc
= elf_section_data (input_section
)->sreloc
;
3013 loc
= sreloc
->contents
;
3014 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3015 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3019 BFD_ASSERT (! unresolved_reloc
);
3020 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
3021 contents
+ rel
->r_offset
);
3025 case R_390_TLS_LDO64
:
3026 if (bfd_link_pic (info
) || (input_section
->flags
& SEC_DEBUGGING
))
3027 relocation
-= dtpoff_base (info
);
3029 /* When converting LDO to LE, we must negate. */
3030 relocation
= -tpoff (info
, relocation
);
3033 /* Relocations for tls instructions. */
3034 case R_390_TLS_LOAD
:
3035 case R_390_TLS_GDCALL
:
3036 case R_390_TLS_LDCALL
:
3037 tls_type
= GOT_UNKNOWN
;
3038 if (h
== NULL
&& local_got_offsets
)
3039 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
3041 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
3043 if (tls_type
== GOT_TLS_GD
)
3046 if (r_type
== R_390_TLS_LOAD
)
3048 if (!bfd_link_pic (info
) && (h
== NULL
|| h
->dynindx
== -1))
3050 /* IE->LE transition. Four valid cases:
3051 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3052 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3053 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3054 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3055 unsigned int insn0
, insn1
, ry
;
3057 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3058 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3059 if (insn1
!= 0x0004)
3061 invalid_tls_insn (input_bfd
, input_section
, rel
);
3064 if ((insn0
& 0xff00f000) == 0xe3000000)
3065 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3066 ry
= (insn0
& 0x000f0000);
3067 else if ((insn0
& 0xff0f0000) == 0xe3000000)
3068 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3069 ry
= (insn0
& 0x0000f000) << 4;
3070 else if ((insn0
& 0xff00f000) == 0xe300c000)
3071 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3072 ry
= (insn0
& 0x000f0000);
3073 else if ((insn0
& 0xff0f0000) == 0xe30c0000)
3074 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3075 ry
= (insn0
& 0x0000f000) << 4;
3078 invalid_tls_insn (input_bfd
, input_section
, rel
);
3081 insn0
= 0xeb000000 | (insn0
& 0x00f00000) | ry
;
3083 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3084 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3087 else if (r_type
== R_390_TLS_GDCALL
)
3089 unsigned int insn0
, insn1
;
3091 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3092 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3093 if ((insn0
& 0xffff0000) != 0xc0e50000)
3095 invalid_tls_insn (input_bfd
, input_section
, rel
);
3098 if (!bfd_link_pic (info
) && (h
== NULL
|| h
->dynindx
== -1))
3100 /* GD->LE transition.
3101 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3107 /* GD->IE transition.
3108 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3112 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3113 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3115 else if (r_type
== R_390_TLS_LDCALL
)
3117 if (!bfd_link_pic (info
))
3119 unsigned int insn0
, insn1
;
3121 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3122 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3123 if ((insn0
& 0xffff0000) != 0xc0e50000)
3125 invalid_tls_insn (input_bfd
, input_section
, rel
);
3128 /* LD->LE transition.
3129 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3132 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3133 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3142 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3143 because such sections are not SEC_ALLOC and thus ld.so will
3144 not process them. */
3145 if (unresolved_reloc
3146 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3148 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3149 rel
->r_offset
) != (bfd_vma
) -1)
3151 /* xgettext:c-format */
3152 (_("%pB(%pA+%#" PRIx64
"): "
3153 "unresolvable %s relocation against symbol `%s'"),
3156 (uint64_t) rel
->r_offset
,
3158 h
->root
.root
.string
);
3162 /* When applying a 24 bit reloc we need to start one byte
3163 earlier. Otherwise the 32 bit get/put bfd operations might
3164 access a byte after the actual section. */
3165 if (r_type
== R_390_PC24DBL
3166 || r_type
== R_390_PLT24DBL
)
3169 if (r_type
== R_390_20
3170 || r_type
== R_390_GOT20
3171 || r_type
== R_390_GOTPLT20
3172 || r_type
== R_390_TLS_GOTIE20
)
3174 relocation
+= rel
->r_addend
;
3175 relocation
= (relocation
&0xfff) << 8 | (relocation
&0xff000) >> 12;
3176 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3177 contents
, rel
->r_offset
,
3181 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3182 contents
, rel
->r_offset
,
3183 relocation
, rel
->r_addend
);
3185 if (r
!= bfd_reloc_ok
)
3190 name
= h
->root
.root
.string
;
3193 name
= bfd_elf_string_from_elf_section (input_bfd
,
3194 symtab_hdr
->sh_link
,
3199 name
= bfd_section_name (sec
);
3202 if (r
== bfd_reloc_overflow
)
3203 (*info
->callbacks
->reloc_overflow
)
3204 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3205 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3209 /* xgettext:c-format */
3210 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
3211 input_bfd
, input_section
,
3212 (uint64_t) rel
->r_offset
, name
, (int) r
);
3221 /* Generate the PLT slots together with the dynamic relocations needed
3222 for IFUNC symbols. */
3225 elf_s390_finish_ifunc_symbol (bfd
*output_bfd
,
3226 struct bfd_link_info
*info
,
3227 struct elf_link_hash_entry
*h
,
3228 struct elf_s390_link_hash_table
*htab
,
3230 bfd_vma resolver_address
)
3234 Elf_Internal_Rela rela
;
3236 asection
*plt
, *gotplt
, *relplt
;
3238 if (htab
->elf
.iplt
== NULL
3239 || htab
->elf
.igotplt
== NULL
3240 || htab
->elf
.irelplt
== NULL
)
3243 /* Index of the PLT slot within iplt section. */
3244 plt_index
= plt_offset
/ PLT_ENTRY_SIZE
;
3245 plt
= htab
->elf
.iplt
;
3246 /* Offset into the igot.plt section. */
3247 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3248 gotplt
= htab
->elf
.igotplt
;
3249 relplt
= htab
->elf
.irelplt
;
3251 /* Fill in the blueprint of a PLT. */
3252 memcpy (plt
->contents
+ plt_offset
, elf_s390x_plt_entry
,
3255 /* Fixup the relative address to the GOT entry */
3256 bfd_put_32 (output_bfd
,
3257 (gotplt
->output_section
->vma
+
3258 gotplt
->output_offset
+ got_offset
3259 - (plt
->output_section
->vma
+
3260 plt
->output_offset
+
3262 plt
->contents
+ plt_offset
+ 2);
3263 /* Fixup the relative branch to PLT 0 */
3264 bfd_put_32 (output_bfd
, - (plt
->output_offset
+
3265 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3266 plt
->contents
+ plt_offset
+ 24);
3267 /* Fixup offset into .rela.plt section. */
3268 bfd_put_32 (output_bfd
, relplt
->output_offset
+
3269 plt_index
* sizeof (Elf64_External_Rela
),
3270 plt
->contents
+ plt_offset
+ 28);
3272 /* Fill in the entry in the global offset table.
3273 Points to instruction after GOT offset. */
3274 bfd_put_64 (output_bfd
,
3275 (plt
->output_section
->vma
3276 + plt
->output_offset
3279 gotplt
->contents
+ got_offset
);
3281 /* Fill in the entry in the .rela.plt section. */
3282 rela
.r_offset
= (gotplt
->output_section
->vma
3283 + gotplt
->output_offset
3288 || ((bfd_link_executable (info
)
3289 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
3292 /* The symbol can be locally resolved. */
3293 rela
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
3294 rela
.r_addend
= resolver_address
;
3298 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3302 loc
= relplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
3303 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3307 /* Finish up dynamic symbol handling. We set the contents of various
3308 dynamic sections here. */
3311 elf_s390_finish_dynamic_symbol (bfd
*output_bfd
,
3312 struct bfd_link_info
*info
,
3313 struct elf_link_hash_entry
*h
,
3314 Elf_Internal_Sym
*sym
)
3316 struct elf_s390_link_hash_table
*htab
;
3317 struct elf_s390_link_hash_entry
*eh
= (struct elf_s390_link_hash_entry
*)h
;
3319 htab
= elf_s390_hash_table (info
);
3323 if (h
->plt
.offset
!= (bfd_vma
) -1)
3326 bfd_vma gotplt_offset
;
3327 Elf_Internal_Rela rela
;
3330 /* This symbol has an entry in the procedure linkage table. Set
3332 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
3334 elf_s390_finish_ifunc_symbol (output_bfd
, info
, h
,
3335 htab
, h
->plt
.offset
,
3336 eh
->ifunc_resolver_address
+
3337 eh
->ifunc_resolver_section
->output_offset
+
3338 eh
->ifunc_resolver_section
->output_section
->vma
);
3340 /* Do not return yet. Handling of explicit GOT slots of
3341 IFUNC symbols is below. */
3345 if (h
->dynindx
== -1
3346 || htab
->elf
.splt
== NULL
3347 || htab
->elf
.sgotplt
== NULL
3348 || htab
->elf
.srelplt
== NULL
)
3352 Current offset - size first entry / entry size. */
3353 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3355 /* The slots in the .got.plt correspond to the PLT slots in
3357 gotplt_offset
= plt_index
* GOT_ENTRY_SIZE
;
3359 /* If .got.plt comes first it needs to contain the 3 header
3361 if (!s390_gotplt_after_got_p (info
))
3362 gotplt_offset
+= 3 * GOT_ENTRY_SIZE
;
3364 /* Fill in the blueprint of a PLT. */
3365 memcpy (htab
->elf
.splt
->contents
+ h
->plt
.offset
, elf_s390x_plt_entry
,
3368 /* The first instruction in the PLT entry is a LARL loading
3369 the address of the GOT slot. We write the 4 byte
3370 immediate operand of the LARL instruction here. */
3371 bfd_put_32 (output_bfd
,
3372 (htab
->elf
.sgotplt
->output_section
->vma
+
3373 htab
->elf
.sgotplt
->output_offset
+ gotplt_offset
3374 - (htab
->elf
.splt
->output_section
->vma
+
3375 htab
->elf
.splt
->output_offset
+
3377 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 2);
3378 /* Fixup the relative branch to PLT 0 */
3379 bfd_put_32 (output_bfd
, - (PLT_FIRST_ENTRY_SIZE
+
3380 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3381 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 24);
3382 /* Fixup offset into .rela.plt section. */
3383 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf64_External_Rela
),
3384 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 28);
3386 /* Fill in the entry in the global offset table.
3387 Points to instruction after GOT offset. */
3388 bfd_put_64 (output_bfd
,
3389 (htab
->elf
.splt
->output_section
->vma
3390 + htab
->elf
.splt
->output_offset
3393 htab
->elf
.sgotplt
->contents
+ gotplt_offset
);
3395 /* Fill in the entry in the .rela.plt section. */
3396 rela
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3397 + htab
->elf
.sgotplt
->output_offset
3399 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3401 loc
= htab
->elf
.srelplt
->contents
+ plt_index
*
3402 sizeof (Elf64_External_Rela
);
3403 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3405 if (!h
->def_regular
)
3407 /* Mark the symbol as undefined, rather than as defined in
3408 the .plt section. Leave the value alone. This is a clue
3409 for the dynamic linker, to make function pointer
3410 comparisons work between an application and shared
3412 sym
->st_shndx
= SHN_UNDEF
;
3417 if (h
->got
.offset
!= (bfd_vma
) -1
3418 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3419 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE
3420 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE_NLT
)
3422 Elf_Internal_Rela rela
;
3425 /* This symbol has an entry in the global offset table. Set it
3427 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
3430 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3431 + htab
->elf
.sgot
->output_offset
3432 + (h
->got
.offset
&~ (bfd_vma
) 1));
3434 if (h
->def_regular
&& s390_is_ifunc_symbol_p (h
))
3436 if (bfd_link_pic (info
))
3438 /* An explicit GOT slot usage needs GLOB_DAT. If the
3439 symbol references local the implicit got.iplt slot
3440 will be used and the IRELATIVE reloc has been created
3446 /* For non-shared objects explicit GOT slots must be
3447 filled with the PLT slot address for pointer
3448 equality reasons. */
3449 bfd_put_64 (output_bfd
, (htab
->elf
.iplt
->output_section
->vma
3450 + htab
->elf
.iplt
->output_offset
3452 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3456 else if (bfd_link_pic (info
)
3457 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3459 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
3462 /* If this is a static link, or it is a -Bsymbolic link and
3463 the symbol is defined locally or was forced to be local
3464 because of a version file, we just want to emit a
3465 RELATIVE reloc. The entry in the global offset table
3466 will already have been initialized in the
3467 relocate_section function. */
3468 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
3470 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3471 rela
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
3472 rela
.r_addend
= (h
->root
.u
.def
.value
3473 + h
->root
.u
.def
.section
->output_section
->vma
3474 + h
->root
.u
.def
.section
->output_offset
);
3478 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3480 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3481 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_GLOB_DAT
);
3485 loc
= htab
->elf
.srelgot
->contents
;
3486 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3487 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3492 Elf_Internal_Rela rela
;
3496 /* This symbols needs a copy reloc. Set it up. */
3498 if (h
->dynindx
== -1
3499 || (h
->root
.type
!= bfd_link_hash_defined
3500 && h
->root
.type
!= bfd_link_hash_defweak
)
3501 || htab
->elf
.srelbss
== NULL
)
3504 rela
.r_offset
= (h
->root
.u
.def
.value
3505 + h
->root
.u
.def
.section
->output_section
->vma
3506 + h
->root
.u
.def
.section
->output_offset
);
3507 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_COPY
);
3509 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3510 s
= htab
->elf
.sreldynrelro
;
3512 s
= htab
->elf
.srelbss
;
3513 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3514 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3517 /* Mark some specially defined symbols as absolute. */
3518 if (h
== htab
->elf
.hdynamic
3519 || h
== htab
->elf
.hgot
3520 || h
== htab
->elf
.hplt
)
3521 sym
->st_shndx
= SHN_ABS
;
3526 /* Used to decide how to sort relocs in an optimal manner for the
3527 dynamic linker, before writing them out. */
3529 static enum elf_reloc_type_class
3530 elf_s390_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3531 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3532 const Elf_Internal_Rela
*rela
)
3534 bfd
*abfd
= info
->output_bfd
;
3535 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3536 struct elf_s390_link_hash_table
*htab
= elf_s390_hash_table (info
);
3537 unsigned long r_symndx
= ELF64_R_SYM (rela
->r_info
);
3538 Elf_Internal_Sym sym
;
3540 if (htab
->elf
.dynsym
== NULL
3541 || !bed
->s
->swap_symbol_in (abfd
,
3542 (htab
->elf
.dynsym
->contents
3543 + r_symndx
* bed
->s
->sizeof_sym
),
3547 /* Check relocation against STT_GNU_IFUNC symbol. */
3548 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
3549 return reloc_class_ifunc
;
3551 switch ((int) ELF64_R_TYPE (rela
->r_info
))
3553 case R_390_RELATIVE
:
3554 return reloc_class_relative
;
3555 case R_390_JMP_SLOT
:
3556 return reloc_class_plt
;
3558 return reloc_class_copy
;
3560 return reloc_class_normal
;
3564 /* Finish up the dynamic sections. */
3567 elf_s390_finish_dynamic_sections (bfd
*output_bfd
,
3568 struct bfd_link_info
*info
)
3570 struct elf_s390_link_hash_table
*htab
;
3576 htab
= elf_s390_hash_table (info
);
3580 dynobj
= htab
->elf
.dynobj
;
3581 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3583 if (htab
->elf
.dynamic_sections_created
)
3585 Elf64_External_Dyn
*dyncon
, *dynconend
;
3587 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
3590 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
3591 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3592 for (; dyncon
< dynconend
; dyncon
++)
3594 Elf_Internal_Dyn dyn
;
3597 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3605 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3606 dyn
.d_un
.d_ptr
= s390_got_pointer (info
);
3610 s
= htab
->elf
.srelplt
;
3611 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3615 dyn
.d_un
.d_val
= htab
->elf
.srelplt
->size
;
3616 if (htab
->elf
.irelplt
)
3617 dyn
.d_un
.d_val
+= htab
->elf
.irelplt
->size
;
3621 /* The procedure linkage table relocs (DT_JMPREL) should
3622 not be included in the overall relocs (DT_RELA).
3623 Therefore, we override the DT_RELASZ entry here to
3624 make it not include the JMPREL relocs. Since the
3625 linker script arranges for .rela.plt to follow all
3626 other relocation sections, we don't have to worry
3627 about changing the DT_RELA entry. */
3628 dyn
.d_un
.d_val
-= htab
->elf
.srelplt
->size
;
3629 if (htab
->elf
.irelplt
)
3630 dyn
.d_un
.d_val
-= htab
->elf
.irelplt
->size
;
3634 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3637 /* Fill in the special first entry in the procedure linkage table. */
3638 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
3640 /* fill in blueprint for plt 0 entry */
3641 memcpy (htab
->elf
.splt
->contents
, elf_s390x_first_plt_entry
,
3642 PLT_FIRST_ENTRY_SIZE
);
3643 /* The second instruction in the first PLT entry is a LARL
3644 loading the GOT pointer. Fill in the LARL immediate
3646 bfd_put_32 (output_bfd
,
3647 (s390_got_pointer (info
)
3648 - htab
->elf
.splt
->output_section
->vma
3649 - htab
->elf
.splt
->output_offset
- 6)/2,
3650 htab
->elf
.splt
->contents
+ 8);
3652 if (elf_section_data (htab
->elf
.splt
->output_section
) != NULL
)
3653 elf_section_data (htab
->elf
.splt
->output_section
)->this_hdr
.sh_entsize
3657 if (htab
->elf
.hgot
&& htab
->elf
.hgot
->root
.u
.def
.section
)
3659 /* Fill in the first three entries in the global offset table. */
3660 if (htab
->elf
.hgot
->root
.u
.def
.section
->size
> 0)
3662 bfd_put_64 (output_bfd
,
3663 (sdyn
== NULL
? (bfd_vma
) 0
3664 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3665 htab
->elf
.hgot
->root
.u
.def
.section
->contents
);
3666 /* One entry for shared object struct ptr. */
3667 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
3668 htab
->elf
.hgot
->root
.u
.def
.section
->contents
+ 8);
3669 /* One entry for _dl_runtime_resolve. */
3670 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
3671 htab
->elf
.hgot
->root
.u
.def
.section
->contents
+ 16);
3673 elf_section_data (htab
->elf
.sgot
->output_section
)
3674 ->this_hdr
.sh_entsize
= 8;
3677 /* Finish dynamic symbol for local IFUNC symbols. */
3678 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3680 struct plt_entry
*local_plt
;
3681 Elf_Internal_Sym
*isym
;
3682 Elf_Internal_Shdr
*symtab_hdr
;
3684 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3686 if (!is_s390_elf (ibfd
))
3689 local_plt
= elf_s390_local_plt (ibfd
);
3690 if (local_plt
!= NULL
)
3691 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
3693 if (local_plt
[i
].plt
.offset
!= (bfd_vma
) -1)
3695 asection
*sec
= local_plt
[i
].sec
;
3696 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, i
);
3700 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3701 elf_s390_finish_ifunc_symbol (output_bfd
, info
, NULL
, htab
,
3702 local_plt
[i
].plt
.offset
,
3704 + sec
->output_section
->vma
3705 + sec
->output_offset
);
3714 /* Support for core dump NOTE sections. */
3717 elf_s390_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
3722 switch (note
->descsz
)
3727 case 336: /* sizeof(struct elf_prstatus) on s390x */
3729 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
3732 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 32);
3740 /* Make a ".reg/999" section. */
3741 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
3742 size
, note
->descpos
+ offset
);
3746 elf_s390_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
3748 switch (note
->descsz
)
3753 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3754 elf_tdata (abfd
)->core
->pid
3755 = bfd_get_32 (abfd
, note
->descdata
+ 24);
3756 elf_tdata (abfd
)->core
->program
3757 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
3758 elf_tdata (abfd
)->core
->command
3759 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
3762 /* Note that for some reason, a spurious space is tacked
3763 onto the end of the args in some (at least one anyway)
3764 implementations, so strip it off if it exists. */
3767 char *command
= elf_tdata (abfd
)->core
->command
;
3768 int n
= strlen (command
);
3770 if (0 < n
&& command
[n
- 1] == ' ')
3771 command
[n
- 1] = '\0';
3778 elf_s390_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
3790 char data
[136] ATTRIBUTE_NONSTRING
= { 0 };
3791 const char *fname
, *psargs
;
3793 va_start (ap
, note_type
);
3794 fname
= va_arg (ap
, const char *);
3795 psargs
= va_arg (ap
, const char *);
3798 strncpy (data
+ 40, fname
, 16);
3799 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3801 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3802 -Wstringop-truncation:
3803 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3805 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
;
3807 strncpy (data
+ 56, psargs
, 80);
3808 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3811 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
3812 &data
, sizeof (data
));
3817 char data
[336] = { 0 };
3822 va_start (ap
, note_type
);
3823 pid
= va_arg (ap
, long);
3824 cursig
= va_arg (ap
, int);
3825 gregs
= va_arg (ap
, const void *);
3828 bfd_put_16 (abfd
, cursig
, data
+ 12);
3829 bfd_put_32 (abfd
, pid
, data
+ 32);
3830 memcpy (data
+ 112, gregs
, 216);
3831 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
3832 &data
, sizeof (data
));
3838 /* Return address for Ith PLT stub in section PLT, for relocation REL
3839 or (bfd_vma) -1 if it should not be included. */
3842 elf_s390_plt_sym_val (bfd_vma i
, const asection
*plt
,
3843 const arelent
*rel ATTRIBUTE_UNUSED
)
3845 return plt
->vma
+ PLT_FIRST_ENTRY_SIZE
+ i
* PLT_ENTRY_SIZE
;
3848 /* Merge backend specific data from an object file to the output
3849 object file when linking. */
3852 elf64_s390_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
3854 if (!is_s390_elf (ibfd
) || !is_s390_elf (info
->output_bfd
))
3857 return elf_s390_merge_obj_attributes (ibfd
, info
);
3860 /* We may add a PT_S390_PGSTE program header. */
3863 elf_s390_additional_program_headers (bfd
*abfd ATTRIBUTE_UNUSED
,
3864 struct bfd_link_info
*info
)
3866 struct elf_s390_link_hash_table
*htab
;
3870 htab
= elf_s390_hash_table (info
);
3872 return htab
->params
->pgste
;
3878 /* Add the PT_S390_PGSTE program header. */
3881 elf_s390_modify_segment_map (bfd
*abfd
, struct bfd_link_info
*info
)
3883 struct elf_s390_link_hash_table
*htab
;
3884 struct elf_segment_map
*m
, *pm
= NULL
;
3889 htab
= elf_s390_hash_table (info
);
3890 if (!htab
|| !htab
->params
->pgste
)
3893 /* If there is already a PT_S390_PGSTE header, avoid adding
3895 m
= elf_seg_map (abfd
);
3896 while (m
&& m
->p_type
!= PT_S390_PGSTE
)
3905 m
= (struct elf_segment_map
*)
3906 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3909 m
->p_type
= PT_S390_PGSTE
;
3919 bfd_elf_s390_set_options (struct bfd_link_info
*info
,
3920 struct s390_elf_params
*params
)
3922 struct elf_s390_link_hash_table
*htab
;
3926 htab
= elf_s390_hash_table (info
);
3928 htab
->params
= params
;
3935 /* Why was the hash table entry size definition changed from
3936 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3937 this is the only reason for the s390_elf64_size_info structure. */
3939 const struct elf_size_info s390_elf64_size_info
=
3941 sizeof (Elf64_External_Ehdr
),
3942 sizeof (Elf64_External_Phdr
),
3943 sizeof (Elf64_External_Shdr
),
3944 sizeof (Elf64_External_Rel
),
3945 sizeof (Elf64_External_Rela
),
3946 sizeof (Elf64_External_Sym
),
3947 sizeof (Elf64_External_Dyn
),
3948 sizeof (Elf_External_Note
),
3949 8, /* hash-table entry size. */
3950 1, /* internal relocations per external relocations. */
3951 64, /* arch_size. */
3952 3, /* log_file_align. */
3953 ELFCLASS64
, EV_CURRENT
,
3954 bfd_elf64_write_out_phdrs
,
3955 bfd_elf64_write_shdrs_and_ehdr
,
3956 bfd_elf64_checksum_contents
,
3957 bfd_elf64_write_relocs
,
3958 bfd_elf64_swap_symbol_in
,
3959 bfd_elf64_swap_symbol_out
,
3960 bfd_elf64_slurp_reloc_table
,
3961 bfd_elf64_slurp_symbol_table
,
3962 bfd_elf64_swap_dyn_in
,
3963 bfd_elf64_swap_dyn_out
,
3964 bfd_elf64_swap_reloc_in
,
3965 bfd_elf64_swap_reloc_out
,
3966 bfd_elf64_swap_reloca_in
,
3967 bfd_elf64_swap_reloca_out
3970 #define TARGET_BIG_SYM s390_elf64_vec
3971 #define TARGET_BIG_NAME "elf64-s390"
3972 #define ELF_ARCH bfd_arch_s390
3973 #define ELF_TARGET_ID S390_ELF_DATA
3974 #define ELF_MACHINE_CODE EM_S390
3975 #define ELF_MACHINE_ALT1 EM_S390_OLD
3976 #define ELF_MAXPAGESIZE 0x1000
3978 #define elf_backend_size_info s390_elf64_size_info
3980 #define elf_backend_can_gc_sections 1
3981 #define elf_backend_can_refcount 1
3982 #define elf_backend_want_got_plt 1
3983 #define elf_backend_plt_readonly 1
3984 #define elf_backend_want_plt_sym 0
3985 #define elf_backend_got_header_size 24
3986 #define elf_backend_want_dynrelro 1
3987 #define elf_backend_rela_normal 1
3989 #define elf_info_to_howto elf_s390_info_to_howto
3991 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3992 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3993 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3994 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3995 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3997 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3998 #define elf_backend_check_relocs elf_s390_check_relocs
3999 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
4000 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
4001 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
4002 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
4003 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
4004 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
4005 #define elf_backend_relocate_section elf_s390_relocate_section
4006 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
4007 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
4008 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
4009 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
4010 #define elf_backend_write_core_note elf_s390_write_core_note
4011 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
4012 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
4013 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
4014 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
4016 #define bfd_elf64_mkobject elf_s390_mkobject
4017 #define elf_backend_object_p elf_s390_object_p
4019 #include "elf64-target.h"