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
->root
.type
== bfd_link_hash_indirect
751 && dir
->got
.refcount
<= 0)
753 edir
->tls_type
= eind
->tls_type
;
754 eind
->tls_type
= GOT_UNKNOWN
;
757 if (ELIMINATE_COPY_RELOCS
758 && ind
->root
.type
!= bfd_link_hash_indirect
759 && dir
->dynamic_adjusted
)
761 /* If called to transfer flags for a weakdef during processing
762 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
763 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
764 if (dir
->versioned
!= versioned_hidden
)
765 dir
->ref_dynamic
|= ind
->ref_dynamic
;
766 dir
->ref_regular
|= ind
->ref_regular
;
767 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
768 dir
->needs_plt
|= ind
->needs_plt
;
771 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
775 elf_s390_tls_transition (struct bfd_link_info
*info
,
779 if (bfd_link_pic (info
))
787 return R_390_TLS_LE64
;
788 return R_390_TLS_IE64
;
789 case R_390_TLS_GOTIE64
:
791 return R_390_TLS_LE64
;
792 return R_390_TLS_GOTIE64
;
793 case R_390_TLS_LDM64
:
794 return R_390_TLS_LE64
;
800 /* Look through the relocs for a section during the first phase, and
801 allocate space in the global offset table or procedure linkage
805 elf_s390_check_relocs (bfd
*abfd
,
806 struct bfd_link_info
*info
,
808 const Elf_Internal_Rela
*relocs
)
810 struct elf_s390_link_hash_table
*htab
;
811 Elf_Internal_Shdr
*symtab_hdr
;
812 struct elf_link_hash_entry
**sym_hashes
;
813 const Elf_Internal_Rela
*rel
;
814 const Elf_Internal_Rela
*rel_end
;
816 bfd_signed_vma
*local_got_refcounts
;
817 int tls_type
, old_tls_type
;
819 if (bfd_link_relocatable (info
))
822 BFD_ASSERT (is_s390_elf (abfd
));
824 htab
= elf_s390_hash_table (info
);
828 symtab_hdr
= &elf_symtab_hdr (abfd
);
829 sym_hashes
= elf_sym_hashes (abfd
);
830 local_got_refcounts
= elf_local_got_refcounts (abfd
);
834 rel_end
= relocs
+ sec
->reloc_count
;
835 for (rel
= relocs
; rel
< rel_end
; rel
++)
838 unsigned int r_symndx
;
839 struct elf_link_hash_entry
*h
;
840 Elf_Internal_Sym
*isym
;
842 r_symndx
= ELF64_R_SYM (rel
->r_info
);
844 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
846 /* xgettext:c-format */
847 _bfd_error_handler (_("%pB: bad symbol index: %d"),
852 if (r_symndx
< symtab_hdr
->sh_info
)
854 /* A local symbol. */
855 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
860 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
862 struct plt_entry
*plt
;
864 if (htab
->elf
.dynobj
== NULL
)
865 htab
->elf
.dynobj
= abfd
;
867 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
870 if (local_got_refcounts
== NULL
)
872 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
874 local_got_refcounts
= elf_local_got_refcounts (abfd
);
876 plt
= elf_s390_local_plt (abfd
);
877 plt
[r_symndx
].plt
.refcount
++;
883 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
884 while (h
->root
.type
== bfd_link_hash_indirect
885 || h
->root
.type
== bfd_link_hash_warning
)
886 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
889 /* Create got section and local_got_refcounts array if they
891 r_type
= elf_s390_tls_transition (info
,
892 ELF64_R_TYPE (rel
->r_info
),
907 case R_390_GOTPLTENT
:
909 case R_390_TLS_GOTIE12
:
910 case R_390_TLS_GOTIE20
:
911 case R_390_TLS_GOTIE64
:
912 case R_390_TLS_IEENT
:
914 case R_390_TLS_LDM64
:
916 && local_got_refcounts
== NULL
)
918 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
920 local_got_refcounts
= elf_local_got_refcounts (abfd
);
929 if (htab
->elf
.sgot
== NULL
)
931 if (htab
->elf
.dynobj
== NULL
)
932 htab
->elf
.dynobj
= abfd
;
933 if (!_bfd_elf_create_got_section (htab
->elf
.dynobj
, info
))
940 if (htab
->elf
.dynobj
== NULL
)
941 htab
->elf
.dynobj
= abfd
;
942 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
945 /* Make sure an IFUNC symbol defined in a non-shared object
946 always gets a PLT slot. */
947 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
949 /* The symbol is called by the dynamic loader in order
950 to resolve the relocation. So it is in fact also
961 /* These relocs do not need a GOT slot. They just load the
962 GOT pointer itself or address something else relative to
963 the GOT. Since the GOT pointer has been set up above we
969 if (h
== NULL
|| !s390_is_ifunc_symbol_p (h
) || !h
->def_regular
)
982 /* This symbol requires a procedure linkage table entry. We
983 actually build the entry in adjust_dynamic_symbol,
984 because this might be a case of linking PIC code which is
985 never referenced by a dynamic object, in which case we
986 don't need to generate a procedure linkage table entry
989 /* If this is a local symbol, we resolve it directly without
990 creating a procedure linkage table entry. */
994 h
->plt
.refcount
+= 1;
1000 case R_390_GOTPLT20
:
1001 case R_390_GOTPLT32
:
1002 case R_390_GOTPLT64
:
1003 case R_390_GOTPLTENT
:
1004 /* This symbol requires either a procedure linkage table entry
1005 or an entry in the local got. We actually build the entry
1006 in adjust_dynamic_symbol because whether this is really a
1007 global reference can change and with it the fact if we have
1008 to create a plt entry or a local got entry. To be able to
1009 make a once global symbol a local one we have to keep track
1010 of the number of gotplt references that exist for this
1014 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
++;
1016 h
->plt
.refcount
+= 1;
1019 local_got_refcounts
[r_symndx
] += 1;
1022 case R_390_TLS_LDM64
:
1023 htab
->tls_ldm_got
.refcount
+= 1;
1026 case R_390_TLS_IE64
:
1027 case R_390_TLS_GOTIE12
:
1028 case R_390_TLS_GOTIE20
:
1029 case R_390_TLS_GOTIE64
:
1030 case R_390_TLS_IEENT
:
1031 if (bfd_link_pic (info
))
1032 info
->flags
|= DF_STATIC_TLS
;
1041 case R_390_TLS_GD64
:
1042 /* This symbol requires a global offset table entry. */
1051 tls_type
= GOT_NORMAL
;
1053 case R_390_TLS_GD64
:
1054 tls_type
= GOT_TLS_GD
;
1056 case R_390_TLS_IE64
:
1057 case R_390_TLS_GOTIE64
:
1058 tls_type
= GOT_TLS_IE
;
1060 case R_390_TLS_GOTIE12
:
1061 case R_390_TLS_GOTIE20
:
1062 case R_390_TLS_IEENT
:
1063 tls_type
= GOT_TLS_IE_NLT
;
1069 h
->got
.refcount
+= 1;
1070 old_tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1074 local_got_refcounts
[r_symndx
] += 1;
1075 old_tls_type
= elf_s390_local_got_tls_type (abfd
) [r_symndx
];
1077 /* If a TLS symbol is accessed using IE at least once,
1078 there is no point to use dynamic model for it. */
1079 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
)
1081 if (old_tls_type
== GOT_NORMAL
|| tls_type
== GOT_NORMAL
)
1084 /* xgettext:c-format */
1085 (_("%pB: `%s' accessed both as normal and thread local symbol"),
1086 abfd
, h
->root
.root
.string
);
1089 if (old_tls_type
> tls_type
)
1090 tls_type
= old_tls_type
;
1093 if (old_tls_type
!= tls_type
)
1096 elf_s390_hash_entry (h
)->tls_type
= tls_type
;
1098 elf_s390_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1101 if (r_type
!= R_390_TLS_IE64
)
1105 case R_390_TLS_LE64
:
1106 /* For static linking and executables this reloc will be
1107 calculated at linktime otherwise a TLS_TPOFF runtime
1108 reloc will be generated. */
1109 if (r_type
== R_390_TLS_LE64
&& bfd_link_pie (info
))
1112 if (!bfd_link_pic (info
))
1114 info
->flags
|= DF_STATIC_TLS
;
1128 if (h
!= NULL
&& bfd_link_executable (info
))
1130 /* If this reloc is in a read-only section, we might
1131 need a copy reloc. We can't check reliably at this
1132 stage whether the section is read-only, as input
1133 sections have not yet been mapped to output sections.
1134 Tentatively set the flag for now, and correct in
1135 adjust_dynamic_symbol. */
1138 if (!bfd_link_pic (info
))
1140 /* We may need a .plt entry if the function this reloc
1141 refers to is in a shared lib. */
1142 h
->plt
.refcount
+= 1;
1146 /* If we are creating a shared library, and this is a reloc
1147 against a global symbol, or a non PC relative reloc
1148 against a local symbol, then we need to copy the reloc
1149 into the shared library. However, if we are linking with
1150 -Bsymbolic, we do not need to copy a reloc against a
1151 global symbol which is defined in an object we are
1152 including in the link (i.e., DEF_REGULAR is set). At
1153 this point we have not seen all the input files, so it is
1154 possible that DEF_REGULAR is not set now but will be set
1155 later (it is never cleared). In case of a weak definition,
1156 DEF_REGULAR may be cleared later by a strong definition in
1157 a shared library. We account for that possibility below by
1158 storing information in the relocs_copied field of the hash
1159 table entry. A similar situation occurs when creating
1160 shared libraries and symbol visibility changes render the
1163 If on the other hand, we are creating an executable, we
1164 may need to keep relocations for symbols satisfied by a
1165 dynamic library if we manage to avoid copy relocs for the
1167 if ((bfd_link_pic (info
)
1168 && (sec
->flags
& SEC_ALLOC
) != 0
1169 && ((ELF64_R_TYPE (rel
->r_info
) != R_390_PC16
1170 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC12DBL
1171 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC16DBL
1172 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC24DBL
1173 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32
1174 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32DBL
1175 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC64
)
1177 && (! SYMBOLIC_BIND (info
, h
)
1178 || h
->root
.type
== bfd_link_hash_defweak
1179 || !h
->def_regular
))))
1180 || (ELIMINATE_COPY_RELOCS
1181 && !bfd_link_pic (info
)
1182 && (sec
->flags
& SEC_ALLOC
) != 0
1184 && (h
->root
.type
== bfd_link_hash_defweak
1185 || !h
->def_regular
)))
1187 struct elf_dyn_relocs
*p
;
1188 struct elf_dyn_relocs
**head
;
1190 /* We must copy these reloc types into the output file.
1191 Create a reloc section in dynobj and make room for
1195 if (htab
->elf
.dynobj
== NULL
)
1196 htab
->elf
.dynobj
= abfd
;
1198 sreloc
= _bfd_elf_make_dynamic_reloc_section
1199 (sec
, htab
->elf
.dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1205 /* If this is a global symbol, we count the number of
1206 relocations we need for this symbol. */
1209 head
= &h
->dyn_relocs
;
1213 /* Track dynamic relocs needed for local syms too.
1214 We really need local syms available to do this
1219 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1224 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1228 vpp
= &elf_section_data (s
)->local_dynrel
;
1229 head
= (struct elf_dyn_relocs
**) vpp
;
1233 if (p
== NULL
|| p
->sec
!= sec
)
1235 size_t amt
= sizeof *p
;
1236 p
= ((struct elf_dyn_relocs
*)
1237 bfd_alloc (htab
->elf
.dynobj
, amt
));
1248 if (ELF64_R_TYPE (rel
->r_info
) == R_390_PC16
1249 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC12DBL
1250 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1251 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1252 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32
1253 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32DBL
1254 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC64
)
1259 /* This relocation describes the C++ object vtable hierarchy.
1260 Reconstruct it for later use during GC. */
1261 case R_390_GNU_VTINHERIT
:
1262 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1266 /* This relocation describes which C++ vtable entries are actually
1267 used. Record for later use during GC. */
1268 case R_390_GNU_VTENTRY
:
1269 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1281 /* Return the section that should be marked against GC for a given
1285 elf_s390_gc_mark_hook (asection
*sec
,
1286 struct bfd_link_info
*info
,
1287 Elf_Internal_Rela
*rel
,
1288 struct elf_link_hash_entry
*h
,
1289 Elf_Internal_Sym
*sym
)
1292 switch (ELF64_R_TYPE (rel
->r_info
))
1294 case R_390_GNU_VTINHERIT
:
1295 case R_390_GNU_VTENTRY
:
1299 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1302 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1303 entry but we found we will not create any. Called when we find we will
1304 not have any PLT for this symbol, by for example
1305 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1306 or elf_s390_size_dynamic_sections if no dynamic sections will be
1307 created (we're only linking static objects). */
1310 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry
*h
)
1312 if (h
->elf
.root
.type
== bfd_link_hash_warning
)
1313 h
= (struct elf_s390_link_hash_entry
*) h
->elf
.root
.u
.i
.link
;
1315 if (h
->gotplt_refcount
<= 0)
1318 /* We simply add the number of gotplt references to the number
1319 * of got references for this symbol. */
1320 h
->elf
.got
.refcount
+= h
->gotplt_refcount
;
1321 h
->gotplt_refcount
= -1;
1324 /* Adjust a symbol defined by a dynamic object and referenced by a
1325 regular object. The current definition is in some section of the
1326 dynamic object, but we're not including those sections. We have to
1327 change the definition to something the rest of the link can
1331 elf_s390_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1332 struct elf_link_hash_entry
*h
)
1334 struct elf_s390_link_hash_table
*htab
;
1337 /* STT_GNU_IFUNC symbol must go through PLT. */
1338 if (s390_is_ifunc_symbol_p (h
))
1340 /* All local STT_GNU_IFUNC references must be treated as local
1341 calls via local PLT. */
1342 if (h
->ref_regular
&& SYMBOL_CALLS_LOCAL (info
, h
))
1344 bfd_size_type pc_count
= 0, count
= 0;
1345 struct elf_dyn_relocs
**pp
;
1346 struct elf_dyn_relocs
*p
;
1348 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
; )
1350 pc_count
+= p
->pc_count
;
1351 p
->count
-= p
->pc_count
;
1360 if (pc_count
|| count
)
1364 if (h
->plt
.refcount
<= 0)
1365 h
->plt
.refcount
= 1;
1367 h
->plt
.refcount
+= 1;
1371 if (h
->plt
.refcount
<= 0)
1373 h
->plt
.offset
= (bfd_vma
) -1;
1379 /* If this is a function, put it in the procedure linkage table. We
1380 will fill in the contents of the procedure linkage table later
1381 (although we could actually do it here). */
1382 if (h
->type
== STT_FUNC
1385 if (h
->plt
.refcount
<= 0
1386 || SYMBOL_CALLS_LOCAL (info
, h
)
1387 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1389 /* This case can occur if we saw a PLT32 reloc in an input
1390 file, but the symbol was never referred to by a dynamic
1391 object, or if all references were garbage collected. In
1392 such a case, we don't actually need to build a procedure
1393 linkage table, and we can just do a PC32 reloc instead. */
1394 h
->plt
.offset
= (bfd_vma
) -1;
1396 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1402 /* It's possible that we incorrectly decided a .plt reloc was
1403 needed for an R_390_PC32 reloc to a non-function sym in
1404 check_relocs. We can't decide accurately between function and
1405 non-function syms in check-relocs; Objects loaded later in
1406 the link may change h->type. So fix it now. */
1407 h
->plt
.offset
= (bfd_vma
) -1;
1409 /* If this is a weak symbol, and there is a real definition, the
1410 processor independent code will have arranged for us to see the
1411 real definition first, and we can just use the same value. */
1412 if (h
->is_weakalias
)
1414 struct elf_link_hash_entry
*def
= weakdef (h
);
1415 BFD_ASSERT (def
->root
.type
== bfd_link_hash_defined
);
1416 h
->root
.u
.def
.section
= def
->root
.u
.def
.section
;
1417 h
->root
.u
.def
.value
= def
->root
.u
.def
.value
;
1418 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1419 h
->non_got_ref
= def
->non_got_ref
;
1423 /* This is a reference to a symbol defined by a dynamic object which
1424 is not a function. */
1426 /* If we are creating a shared library, we must presume that the
1427 only references to the symbol are via the global offset table.
1428 For such cases we need not do anything here; the relocations will
1429 be handled correctly by relocate_section. */
1430 if (bfd_link_pic (info
))
1433 /* If there are no references to this symbol that do not use the
1434 GOT, we don't need to generate a copy reloc. */
1435 if (!h
->non_got_ref
)
1438 /* If -z nocopyreloc was given, we won't generate them either. */
1439 if (info
->nocopyreloc
)
1445 /* If we don't find any dynamic relocs in read-only sections, then
1446 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1447 if (ELIMINATE_COPY_RELOCS
&& !_bfd_elf_readonly_dynrelocs (h
))
1453 /* We must allocate the symbol in our .dynbss section, which will
1454 become part of the .bss section of the executable. There will be
1455 an entry for this symbol in the .dynsym section. The dynamic
1456 object will contain position independent code, so all references
1457 from the dynamic object to this symbol will go through the global
1458 offset table. The dynamic linker will use the .dynsym entry to
1459 determine the address it must put in the global offset table, so
1460 both the dynamic object and the regular object will refer to the
1461 same memory location for the variable. */
1463 htab
= elf_s390_hash_table (info
);
1467 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1468 copy the initial value out of the dynamic object and into the
1469 runtime process image. */
1470 if ((h
->root
.u
.def
.section
->flags
& SEC_READONLY
) != 0)
1472 s
= htab
->elf
.sdynrelro
;
1473 srel
= htab
->elf
.sreldynrelro
;
1477 s
= htab
->elf
.sdynbss
;
1478 srel
= htab
->elf
.srelbss
;
1480 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1482 srel
->size
+= sizeof (Elf64_External_Rela
);
1486 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
1489 /* Allocate space in .plt, .got and associated reloc sections for
1493 allocate_dynrelocs (struct elf_link_hash_entry
*h
,
1496 struct bfd_link_info
*info
;
1497 struct elf_s390_link_hash_table
*htab
;
1498 struct elf_dyn_relocs
*p
;
1500 if (h
->root
.type
== bfd_link_hash_indirect
)
1503 info
= (struct bfd_link_info
*) inf
;
1504 htab
= elf_s390_hash_table (info
);
1508 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1509 here if it is defined and referenced in a non-shared object. */
1510 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
1511 return s390_elf_allocate_ifunc_dyn_relocs (info
, h
);
1512 else if (htab
->elf
.dynamic_sections_created
1513 && h
->plt
.refcount
> 0)
1515 /* Make sure this symbol is output as a dynamic symbol.
1516 Undefined weak syms won't yet be marked as dynamic. */
1517 if (h
->dynindx
== -1
1518 && !h
->forced_local
)
1520 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1524 if (bfd_link_pic (info
)
1525 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1527 asection
*s
= htab
->elf
.splt
;
1529 /* If this is the first .plt entry, make room for the special
1532 s
->size
+= PLT_FIRST_ENTRY_SIZE
;
1534 h
->plt
.offset
= s
->size
;
1536 /* If this symbol is not defined in a regular file, and we are
1537 not generating a shared library, then set the symbol to this
1538 location in the .plt. This is required to make function
1539 pointers compare as equal between the normal executable and
1540 the shared library. */
1541 if (! bfd_link_pic (info
)
1544 h
->root
.u
.def
.section
= s
;
1545 h
->root
.u
.def
.value
= h
->plt
.offset
;
1548 /* Make room for this entry. */
1549 s
->size
+= PLT_ENTRY_SIZE
;
1551 /* We also need to make an entry in the .got.plt section. */
1552 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
1554 /* We also need to make an entry in the .rela.plt section. */
1555 htab
->elf
.srelplt
->size
+= sizeof (Elf64_External_Rela
);
1559 h
->plt
.offset
= (bfd_vma
) -1;
1561 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1566 h
->plt
.offset
= (bfd_vma
) -1;
1568 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1571 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1572 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1573 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1574 we can save the dynamic TLS relocation. */
1575 if (h
->got
.refcount
> 0
1576 && !bfd_link_pic (info
)
1578 && elf_s390_hash_entry(h
)->tls_type
>= GOT_TLS_IE
)
1580 if (elf_s390_hash_entry(h
)->tls_type
== GOT_TLS_IE_NLT
)
1581 /* For the GOTIE access without a literal pool entry the offset has
1582 to be stored somewhere. The immediate value in the instruction
1583 is not bit enough so the value is stored in the got. */
1585 h
->got
.offset
= htab
->elf
.sgot
->size
;
1586 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
1589 h
->got
.offset
= (bfd_vma
) -1;
1591 else if (h
->got
.refcount
> 0)
1595 int tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1597 /* Make sure this symbol is output as a dynamic symbol.
1598 Undefined weak syms won't yet be marked as dynamic. */
1599 if (h
->dynindx
== -1
1600 && !h
->forced_local
)
1602 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1607 h
->got
.offset
= s
->size
;
1608 s
->size
+= GOT_ENTRY_SIZE
;
1609 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1610 if (tls_type
== GOT_TLS_GD
)
1611 s
->size
+= GOT_ENTRY_SIZE
;
1612 dyn
= htab
->elf
.dynamic_sections_created
;
1613 /* R_390_TLS_IE64 needs one dynamic relocation,
1614 R_390_TLS_GD64 needs one if local symbol and two if global. */
1615 if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1616 || tls_type
>= GOT_TLS_IE
)
1617 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1618 else if (tls_type
== GOT_TLS_GD
)
1619 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf64_External_Rela
);
1620 else if (!UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
)
1621 && (bfd_link_pic (info
)
1622 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1623 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1626 h
->got
.offset
= (bfd_vma
) -1;
1628 if (h
->dyn_relocs
== NULL
)
1631 /* In the shared -Bsymbolic case, discard space allocated for
1632 dynamic pc-relative relocs against symbols which turn out to be
1633 defined in regular objects. For the normal shared case, discard
1634 space for pc-relative relocs that have become local due to symbol
1635 visibility changes. */
1637 if (bfd_link_pic (info
))
1639 if (SYMBOL_CALLS_LOCAL (info
, h
))
1641 struct elf_dyn_relocs
**pp
;
1643 for (pp
= &h
->dyn_relocs
; (p
= *pp
) != NULL
; )
1645 p
->count
-= p
->pc_count
;
1654 /* Also discard relocs on undefined weak syms with non-default
1656 if (h
->dyn_relocs
!= NULL
1657 && h
->root
.type
== bfd_link_hash_undefweak
)
1659 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1660 || UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
1661 h
->dyn_relocs
= NULL
;
1663 /* Make sure undefined weak symbols are output as a dynamic
1665 else if (h
->dynindx
== -1
1666 && !h
->forced_local
)
1668 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1673 else if (ELIMINATE_COPY_RELOCS
)
1675 /* For the non-shared case, discard space for relocs against
1676 symbols which turn out to need copy relocs or are not
1682 || (htab
->elf
.dynamic_sections_created
1683 && (h
->root
.type
== bfd_link_hash_undefweak
1684 || h
->root
.type
== bfd_link_hash_undefined
))))
1686 /* Make sure this symbol is output as a dynamic symbol.
1687 Undefined weak syms won't yet be marked as dynamic. */
1688 if (h
->dynindx
== -1
1689 && !h
->forced_local
)
1691 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1695 /* If that succeeded, we know we'll be keeping all the
1697 if (h
->dynindx
!= -1)
1701 h
->dyn_relocs
= NULL
;
1706 /* Finally, allocate space. */
1707 for (p
= h
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1709 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1710 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1716 /* Set the sizes of the dynamic sections. */
1719 elf_s390_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1720 struct bfd_link_info
*info
)
1722 struct elf_s390_link_hash_table
*htab
;
1728 htab
= elf_s390_hash_table (info
);
1732 dynobj
= htab
->elf
.dynobj
;
1736 if (htab
->elf
.dynamic_sections_created
)
1738 /* Set the contents of the .interp section to the interpreter. */
1739 if (bfd_link_executable (info
) && !info
->nointerp
)
1741 s
= bfd_get_linker_section (dynobj
, ".interp");
1744 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1745 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1749 if (htab
->elf
.sgot
&& s390_gotplt_after_got_p (info
))
1751 /* _bfd_elf_create_got_section adds the got header size always
1752 to .got.plt but we need it in .got if this section comes
1754 htab
->elf
.sgot
->size
+= 3 * GOT_ENTRY_SIZE
;
1755 htab
->elf
.sgotplt
->size
-= 3 * GOT_ENTRY_SIZE
;
1757 /* Make the _GLOBAL_OFFSET_TABLE_ symbol point to the .got
1758 instead of .got.plt. */
1759 htab
->elf
.hgot
->root
.u
.def
.section
= htab
->elf
.sgot
;
1760 htab
->elf
.hgot
->root
.u
.def
.value
= 0;
1763 /* Set up .got offsets for local syms, and space for local dynamic
1765 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
1767 bfd_signed_vma
*local_got
;
1768 bfd_signed_vma
*end_local_got
;
1769 char *local_tls_type
;
1770 bfd_size_type locsymcount
;
1771 Elf_Internal_Shdr
*symtab_hdr
;
1773 struct plt_entry
*local_plt
;
1776 if (! is_s390_elf (ibfd
))
1779 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1781 struct elf_dyn_relocs
*p
;
1783 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
1785 if (!bfd_is_abs_section (p
->sec
)
1786 && bfd_is_abs_section (p
->sec
->output_section
))
1788 /* Input section has been discarded, either because
1789 it is a copy of a linkonce section or due to
1790 linker script /DISCARD/, so we'll be discarding
1793 else if (p
->count
!= 0)
1795 srela
= elf_section_data (p
->sec
)->sreloc
;
1796 srela
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1797 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
1798 info
->flags
|= DF_TEXTREL
;
1803 local_got
= elf_local_got_refcounts (ibfd
);
1807 symtab_hdr
= &elf_symtab_hdr (ibfd
);
1808 locsymcount
= symtab_hdr
->sh_info
;
1809 end_local_got
= local_got
+ locsymcount
;
1810 local_tls_type
= elf_s390_local_got_tls_type (ibfd
);
1812 srela
= htab
->elf
.srelgot
;
1813 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
1817 *local_got
= s
->size
;
1818 s
->size
+= GOT_ENTRY_SIZE
;
1819 if (*local_tls_type
== GOT_TLS_GD
)
1820 s
->size
+= GOT_ENTRY_SIZE
;
1821 if (bfd_link_pic (info
))
1822 srela
->size
+= sizeof (Elf64_External_Rela
);
1825 *local_got
= (bfd_vma
) -1;
1828 local_plt
= elf_s390_local_plt (ibfd
);
1829 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
1831 if (local_plt
[i
].plt
.refcount
> 0)
1833 local_plt
[i
].plt
.offset
= htab
->elf
.iplt
->size
;
1834 htab
->elf
.iplt
->size
+= PLT_ENTRY_SIZE
;
1835 htab
->elf
.igotplt
->size
+= GOT_ENTRY_SIZE
;
1836 htab
->elf
.irelplt
->size
+= sizeof (Elf64_External_Rela
);
1839 local_plt
[i
].plt
.offset
= (bfd_vma
) -1;
1843 if (htab
->tls_ldm_got
.refcount
> 0)
1845 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
1847 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
1848 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
1849 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1852 htab
->tls_ldm_got
.offset
= -1;
1854 /* Allocate global sym .plt and .got entries, and space for global
1855 sym dynamic relocs. */
1856 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, info
);
1858 /* We now have determined the sizes of the various dynamic sections.
1859 Allocate memory for them. */
1861 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
1863 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
1866 if (s
== htab
->elf
.splt
1867 || s
== htab
->elf
.sgot
1868 || s
== htab
->elf
.sgotplt
1869 || s
== htab
->elf
.sdynbss
1870 || s
== htab
->elf
.sdynrelro
1871 || s
== htab
->elf
.iplt
1872 || s
== htab
->elf
.igotplt
1873 || s
== htab
->irelifunc
)
1875 /* Strip this section if we don't need it; see the
1878 else if (CONST_STRNEQ (bfd_section_name (s
), ".rela"))
1880 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
1883 /* We use the reloc_count field as a counter if we need
1884 to copy relocs into the output file. */
1889 /* It's not one of our sections, so don't allocate space. */
1895 /* If we don't need this section, strip it from the
1896 output file. This is to handle .rela.bss and
1897 .rela.plt. We must create it in
1898 create_dynamic_sections, because it must be created
1899 before the linker maps input sections to output
1900 sections. The linker does that before
1901 adjust_dynamic_symbol is called, and it is that
1902 function which decides whether anything needs to go
1903 into these sections. */
1905 s
->flags
|= SEC_EXCLUDE
;
1909 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
1912 /* Allocate memory for the section contents. We use bfd_zalloc
1913 here in case unused entries are not reclaimed before the
1914 section's contents are written out. This should not happen,
1915 but this way if it does, we get a R_390_NONE reloc instead
1917 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
1918 if (s
->contents
== NULL
)
1922 return _bfd_elf_add_dynamic_tags (output_bfd
, info
, relocs
);
1925 /* Return the base VMA address which should be subtracted from real addresses
1926 when resolving @dtpoff relocation.
1927 This is PT_TLS segment p_vaddr. */
1930 dtpoff_base (struct bfd_link_info
*info
)
1932 /* If tls_sec is NULL, we should have signalled an error already. */
1933 if (elf_hash_table (info
)->tls_sec
== NULL
)
1935 return elf_hash_table (info
)->tls_sec
->vma
;
1938 /* Return the relocation value for @tpoff relocation
1939 if STT_TLS virtual address is ADDRESS. */
1942 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
1944 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
1946 /* If tls_sec is NULL, we should have signalled an error already. */
1947 if (htab
->tls_sec
== NULL
)
1949 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
1952 /* Complain if TLS instruction relocation is against an invalid
1956 invalid_tls_insn (bfd
*input_bfd
,
1957 asection
*input_section
,
1958 Elf_Internal_Rela
*rel
)
1960 reloc_howto_type
*howto
;
1962 howto
= elf_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
1964 /* xgettext:c-format */
1965 (_("%pB(%pA+%#" PRIx64
"): invalid instruction for TLS relocation %s"),
1968 (uint64_t) rel
->r_offset
,
1970 bfd_set_error (bfd_error_bad_value
);
1973 /* Relocate a 390 ELF section. */
1976 elf_s390_relocate_section (bfd
*output_bfd
,
1977 struct bfd_link_info
*info
,
1979 asection
*input_section
,
1981 Elf_Internal_Rela
*relocs
,
1982 Elf_Internal_Sym
*local_syms
,
1983 asection
**local_sections
)
1985 struct elf_s390_link_hash_table
*htab
;
1986 Elf_Internal_Shdr
*symtab_hdr
;
1987 struct elf_link_hash_entry
**sym_hashes
;
1988 bfd_vma
*local_got_offsets
;
1989 Elf_Internal_Rela
*rel
;
1990 Elf_Internal_Rela
*relend
;
1992 if (!is_s390_elf (input_bfd
))
1994 bfd_set_error (bfd_error_wrong_format
);
1998 htab
= elf_s390_hash_table (info
);
2002 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2003 sym_hashes
= elf_sym_hashes (input_bfd
);
2004 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2007 relend
= relocs
+ input_section
->reloc_count
;
2008 for (; rel
< relend
; rel
++)
2010 unsigned int r_type
;
2011 reloc_howto_type
*howto
;
2012 unsigned long r_symndx
;
2013 struct elf_link_hash_entry
*h
;
2014 Elf_Internal_Sym
*sym
;
2018 bfd_boolean unresolved_reloc
;
2019 bfd_reloc_status_type r
;
2021 bfd_boolean resolved_to_zero
;
2023 r_type
= ELF64_R_TYPE (rel
->r_info
);
2024 if (r_type
== (int) R_390_GNU_VTINHERIT
2025 || r_type
== (int) R_390_GNU_VTENTRY
)
2027 if (r_type
>= (int) R_390_max
)
2029 bfd_set_error (bfd_error_bad_value
);
2033 howto
= elf_howto_table
+ r_type
;
2034 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2039 unresolved_reloc
= FALSE
;
2040 if (r_symndx
< symtab_hdr
->sh_info
)
2042 sym
= local_syms
+ r_symndx
;
2043 sec
= local_sections
[r_symndx
];
2045 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2047 struct plt_entry
*local_plt
= elf_s390_local_plt (input_bfd
);
2048 if (local_plt
== NULL
)
2051 /* Address of the PLT slot. */
2052 relocation
= (htab
->elf
.iplt
->output_section
->vma
2053 + htab
->elf
.iplt
->output_offset
2054 + local_plt
[r_symndx
].plt
.offset
);
2058 case R_390_PLTOFF16
:
2059 case R_390_PLTOFF32
:
2060 case R_390_PLTOFF64
:
2061 relocation
-= s390_got_pointer (info
);
2063 case R_390_GOTPLT12
:
2064 case R_390_GOTPLT16
:
2065 case R_390_GOTPLT20
:
2066 case R_390_GOTPLT32
:
2067 case R_390_GOTPLT64
:
2068 case R_390_GOTPLTENT
:
2076 /* Write the PLT slot address into the GOT slot. */
2077 bfd_put_64 (output_bfd
, relocation
,
2078 htab
->elf
.sgot
->contents
+
2079 local_got_offsets
[r_symndx
]);
2080 relocation
= (local_got_offsets
[r_symndx
] +
2081 s390_got_offset (info
));
2083 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2084 relocation
+= s390_got_pointer (info
);
2090 /* The output section is needed later in
2091 finish_dynamic_section when creating the dynamic
2093 local_plt
[r_symndx
].sec
= sec
;
2097 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2101 bfd_boolean warned ATTRIBUTE_UNUSED
;
2102 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2104 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2105 r_symndx
, symtab_hdr
, sym_hashes
,
2107 unresolved_reloc
, warned
, ignored
);
2110 if (sec
!= NULL
&& discarded_section (sec
))
2111 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2112 rel
, 1, relend
, howto
, 0, contents
);
2114 if (bfd_link_relocatable (info
))
2117 resolved_to_zero
= (h
!= NULL
2118 && UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
));
2122 case R_390_GOTPLT12
:
2123 case R_390_GOTPLT16
:
2124 case R_390_GOTPLT20
:
2125 case R_390_GOTPLT32
:
2126 case R_390_GOTPLT64
:
2127 case R_390_GOTPLTENT
:
2128 /* There are three cases for a GOTPLT relocation. 1) The
2129 relocation is against the jump slot entry of a plt that
2130 will get emitted to the output file. 2) The relocation
2131 is against the jump slot of a plt entry that has been
2132 removed. elf_s390_adjust_gotplt has created a GOT entry
2133 as replacement. 3) The relocation is against a local symbol.
2134 Cases 2) and 3) are the same as the GOT relocation code
2135 so we just have to test for case 1 and fall through for
2137 if (h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
2141 if (s390_is_ifunc_symbol_p (h
))
2143 /* Entry indices of .iplt and .igot.plt match
2144 1:1. No magic PLT first entry here. */
2145 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2146 relocation
= (plt_index
* GOT_ENTRY_SIZE
2147 + s390_gotplt_offset (info
)
2148 + htab
->elf
.igotplt
->output_offset
);
2152 plt_index
= ((h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
)
2155 relocation
= (plt_index
* GOT_ENTRY_SIZE
2156 + s390_gotplt_offset (info
));
2158 if (r_type
== R_390_GOTPLTENT
)
2159 relocation
+= s390_got_pointer (info
);
2160 unresolved_reloc
= FALSE
;
2171 /* Relocation is to the entry for this symbol in the global
2173 if (htab
->elf
.sgot
== NULL
)
2180 off
= h
->got
.offset
;
2181 dyn
= htab
->elf
.dynamic_sections_created
;
2183 if (s390_is_ifunc_symbol_p (h
))
2185 BFD_ASSERT (h
->plt
.offset
!= (bfd_vma
) -1);
2186 if (off
== (bfd_vma
)-1)
2188 /* No explicit GOT usage so redirect to the
2190 relocation
= (s390_gotplt_offset (info
)
2191 + htab
->elf
.igotplt
->output_offset
2192 + (h
->plt
.offset
/ PLT_ENTRY_SIZE
2195 /* For @GOTENT the relocation is against the offset between
2196 the instruction and the symbols entry in the GOT and not
2197 between the start of the GOT and the symbols entry. We
2198 add the vma of the GOT to get the correct value. */
2199 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2200 relocation
+= s390_got_pointer (info
);
2206 /* Explicit GOT slots must contain the address
2207 of the PLT slot. This will be handled in
2208 finish_dynamic_symbol. */
2211 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2212 bfd_link_pic (info
),
2214 || (bfd_link_pic (info
)
2215 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2216 || resolved_to_zero
)
2218 Elf_Internal_Sym
*isym
;
2221 /* This is actually a static link, or it is a
2222 -Bsymbolic link and the symbol is defined
2223 locally, or the symbol was forced to be local
2224 because of a version file. We must initialize
2225 this entry in the global offset table. Since the
2226 offset must always be a multiple of 2, we use the
2227 least significant bit to record whether we have
2228 initialized it already.
2230 When doing a dynamic link, we create a .rel.got
2231 relocation entry to initialize the value. This
2232 is done in the finish_dynamic_symbol routine. */
2237 bfd_put_64 (output_bfd
, relocation
,
2238 htab
->elf
.sgot
->contents
+ off
);
2242 /* When turning a GOT slot dereference into a direct
2243 reference using larl we have to make sure that
2244 the symbol is 1. properly aligned and 2. it is no
2245 ABS symbol or will become one. */
2247 && bfd_link_pic (info
)
2248 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2249 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2250 && ((r_type
== R_390_GOTENT
2251 && (bfd_get_16 (input_bfd
,
2252 contents
+ rel
->r_offset
- 2)
2253 & 0xff0f) == 0xc408)
2254 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2255 || (r_type
== R_390_GOT20
2256 && (bfd_get_32 (input_bfd
,
2257 contents
+ rel
->r_offset
- 2)
2258 & 0xff00f000) == 0xe300c000
2259 && bfd_get_8 (input_bfd
,
2260 contents
+ rel
->r_offset
+ 3) == 0x04))
2261 && (isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
2262 input_bfd
, r_symndx
))
2263 && isym
->st_shndx
!= SHN_ABS
2264 && h
!= htab
->elf
.hdynamic
2265 && h
!= htab
->elf
.hgot
2266 && h
!= htab
->elf
.hplt
2267 && !(isym
->st_value
& 1)
2268 && (sym_sec
= bfd_section_from_elf_index (input_bfd
,
2270 && sym_sec
->alignment_power
)
2272 unsigned short new_insn
=
2273 (0xc000 | (bfd_get_8 (input_bfd
,
2274 contents
+ rel
->r_offset
- 1) & 0xf0));
2275 bfd_put_16 (output_bfd
, new_insn
,
2276 contents
+ rel
->r_offset
- 2);
2277 r_type
= R_390_PC32DBL
;
2279 howto
= elf_howto_table
+ r_type
;
2280 relocation
= h
->root
.u
.def
.value
2281 + h
->root
.u
.def
.section
->output_section
->vma
2282 + h
->root
.u
.def
.section
->output_offset
;
2287 unresolved_reloc
= FALSE
;
2291 if (local_got_offsets
== NULL
)
2294 off
= local_got_offsets
[r_symndx
];
2296 /* The offset must always be a multiple of 8. We use
2297 the least significant bit to record whether we have
2298 already generated the necessary reloc. */
2303 bfd_put_64 (output_bfd
, relocation
,
2304 htab
->elf
.sgot
->contents
+ off
);
2306 if (bfd_link_pic (info
))
2309 Elf_Internal_Rela outrel
;
2312 s
= htab
->elf
.srelgot
;
2316 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2317 + htab
->elf
.sgot
->output_offset
2319 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2320 outrel
.r_addend
= relocation
;
2322 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2323 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2326 local_got_offsets
[r_symndx
] |= 1;
2330 if (off
>= (bfd_vma
) -2)
2333 relocation
= s390_got_offset (info
) + off
;
2335 /* For @GOTENT the relocation is against the offset between
2336 the instruction and the symbols entry in the GOT and not
2337 between the start of the GOT and the symbols entry. We
2338 add the vma of the GOT to get the correct value. */
2339 if ( r_type
== R_390_GOTENT
2340 || r_type
== R_390_GOTPLTENT
)
2341 relocation
+= s390_got_pointer (info
);
2345 case R_390_GOTOFF16
:
2346 case R_390_GOTOFF32
:
2347 case R_390_GOTOFF64
:
2348 /* Relocation is relative to the start of the global offset
2352 && s390_is_ifunc_symbol_p (h
)
2354 && !bfd_link_executable (info
))
2356 relocation
= (htab
->elf
.iplt
->output_section
->vma
2357 + htab
->elf
.iplt
->output_offset
2359 - s390_got_pointer (info
));
2363 relocation
-= s390_got_pointer (info
);
2367 case R_390_GOTPCDBL
:
2368 /* Use global offset table as symbol value. */
2369 relocation
= s390_got_pointer (info
);
2370 unresolved_reloc
= FALSE
;
2373 case R_390_PLT12DBL
:
2374 case R_390_PLT16DBL
:
2375 case R_390_PLT24DBL
:
2377 case R_390_PLT32DBL
:
2379 /* Relocation is to the entry for this symbol in the
2380 procedure linkage table. */
2382 /* Resolve a PLT32 reloc against a local symbol directly,
2383 without using the procedure linkage table. */
2387 if (h
->plt
.offset
== (bfd_vma
) -1
2388 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2390 /* We didn't make a PLT entry for this symbol. This
2391 happens when statically linking PIC code, or when
2392 using -Bsymbolic. */
2395 if (s390_is_ifunc_symbol_p (h
))
2396 relocation
= (htab
->elf
.iplt
->output_section
->vma
2397 + htab
->elf
.iplt
->output_offset
2400 relocation
= (htab
->elf
.splt
->output_section
->vma
2401 + htab
->elf
.splt
->output_offset
2403 unresolved_reloc
= FALSE
;
2406 case R_390_PLTOFF16
:
2407 case R_390_PLTOFF32
:
2408 case R_390_PLTOFF64
:
2409 /* Relocation is to the entry for this symbol in the
2410 procedure linkage table relative to the start of the GOT. */
2412 /* For local symbols or if we didn't make a PLT entry for
2413 this symbol resolve the symbol directly. */
2415 || h
->plt
.offset
== (bfd_vma
) -1
2416 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2418 relocation
-= s390_got_pointer (info
);
2422 if (s390_is_ifunc_symbol_p (h
))
2423 relocation
= (htab
->elf
.iplt
->output_section
->vma
2424 + htab
->elf
.iplt
->output_offset
2426 - s390_got_pointer (info
));
2428 relocation
= (htab
->elf
.splt
->output_section
->vma
2429 + htab
->elf
.splt
->output_offset
2431 - s390_got_pointer (info
));
2432 unresolved_reloc
= FALSE
;
2443 && bfd_link_pie (info
)
2446 _bfd_error_handler (_("%pB: `%s' non-PLT reloc for symbol defined "
2447 "in shared library and accessed "
2449 "(rebuild file with -fPIC ?)"),
2450 input_bfd
, h
->root
.root
.string
);
2451 bfd_set_error (bfd_error_bad_value
);
2454 /* The target of these relocs are instruction operands
2455 residing in read-only sections. We cannot emit a runtime
2458 && s390_is_ifunc_symbol_p (h
)
2460 && bfd_link_pic (info
))
2462 relocation
= (htab
->elf
.iplt
->output_section
->vma
2463 + htab
->elf
.iplt
->output_offset
2474 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2478 && s390_is_ifunc_symbol_p (h
)
2481 if (!bfd_link_pic (info
))
2483 /* For a non-shared object the symbol will not
2484 change. Hence we can write the address of the
2485 target IPLT slot now. */
2486 relocation
= (htab
->elf
.iplt
->output_section
->vma
2487 + htab
->elf
.iplt
->output_offset
2493 /* For shared objects a runtime relocation is needed. */
2495 Elf_Internal_Rela outrel
;
2498 /* Need a dynamic relocation to get the real function
2500 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2504 if (outrel
.r_offset
== (bfd_vma
) -1
2505 || outrel
.r_offset
== (bfd_vma
) -2)
2508 outrel
.r_offset
+= (input_section
->output_section
->vma
2509 + input_section
->output_offset
);
2511 if (h
->dynindx
== -1
2513 || bfd_link_executable (info
))
2515 /* This symbol is resolved locally. */
2516 outrel
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
2517 outrel
.r_addend
= (h
->root
.u
.def
.value
2518 + h
->root
.u
.def
.section
->output_section
->vma
2519 + h
->root
.u
.def
.section
->output_offset
);
2523 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2524 outrel
.r_addend
= 0;
2527 sreloc
= htab
->elf
.irelifunc
;
2528 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2530 /* If this reloc is against an external symbol, we
2531 do not want to fiddle with the addend. Otherwise,
2532 we need to include the symbol value so that it
2533 becomes an addend for the dynamic reloc. For an
2534 internal symbol, we have updated addend. */
2539 if ((bfd_link_pic (info
)
2541 || (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2542 && !resolved_to_zero
)
2543 || h
->root
.type
!= bfd_link_hash_undefweak
)
2544 && ((r_type
!= R_390_PC16
2545 && r_type
!= R_390_PC12DBL
2546 && r_type
!= R_390_PC16DBL
2547 && r_type
!= R_390_PC24DBL
2548 && r_type
!= R_390_PC32
2549 && r_type
!= R_390_PC32DBL
2550 && r_type
!= R_390_PC64
)
2551 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2552 || (ELIMINATE_COPY_RELOCS
2553 && !bfd_link_pic (info
)
2559 || h
->root
.type
== bfd_link_hash_undefweak
2560 || h
->root
.type
== bfd_link_hash_undefined
)))
2562 Elf_Internal_Rela outrel
;
2563 bfd_boolean skip
, relocate
;
2567 /* When generating a shared object, these relocations
2568 are copied into the output file to be resolved at run
2574 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2576 if (outrel
.r_offset
== (bfd_vma
) -1)
2578 else if (outrel
.r_offset
== (bfd_vma
) -2)
2579 skip
= TRUE
, relocate
= TRUE
;
2581 outrel
.r_offset
+= (input_section
->output_section
->vma
2582 + input_section
->output_offset
);
2585 memset (&outrel
, 0, sizeof outrel
);
2588 && (r_type
== R_390_PC16
2589 || r_type
== R_390_PC12DBL
2590 || r_type
== R_390_PC16DBL
2591 || r_type
== R_390_PC24DBL
2592 || r_type
== R_390_PC32
2593 || r_type
== R_390_PC32DBL
2594 || r_type
== R_390_PC64
2595 || !bfd_link_pic (info
)
2596 || !SYMBOLIC_BIND (info
, h
)
2597 || !h
->def_regular
))
2599 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2600 outrel
.r_addend
= rel
->r_addend
;
2604 /* This symbol is local, or marked to become local. */
2605 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2606 if (r_type
== R_390_64
)
2609 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2615 if (bfd_is_abs_section (sec
))
2617 else if (sec
== NULL
|| sec
->owner
== NULL
)
2619 bfd_set_error(bfd_error_bad_value
);
2626 osec
= sec
->output_section
;
2627 sindx
= elf_section_data (osec
)->dynindx
;
2631 osec
= htab
->elf
.text_index_section
;
2632 sindx
= elf_section_data (osec
)->dynindx
;
2634 BFD_ASSERT (sindx
!= 0);
2636 /* We are turning this relocation into one
2637 against a section symbol, so subtract out
2638 the output section's address but not the
2639 offset of the input section in the output
2641 outrel
.r_addend
-= osec
->vma
;
2643 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
2647 sreloc
= elf_section_data (input_section
)->sreloc
;
2651 loc
= sreloc
->contents
;
2652 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2653 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2655 /* If this reloc is against an external symbol, we do
2656 not want to fiddle with the addend. Otherwise, we
2657 need to include the symbol value so that it becomes
2658 an addend for the dynamic reloc. */
2665 /* Relocations for tls literal pool entries. */
2666 case R_390_TLS_IE64
:
2667 if (bfd_link_pic (info
))
2669 Elf_Internal_Rela outrel
;
2673 outrel
.r_offset
= rel
->r_offset
2674 + input_section
->output_section
->vma
2675 + input_section
->output_offset
;
2676 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2677 sreloc
= elf_section_data (input_section
)->sreloc
;
2680 loc
= sreloc
->contents
;
2681 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2682 bfd_elf64_swap_reloc_out (output_bfd
, &outrel
, loc
);
2686 case R_390_TLS_GD64
:
2687 case R_390_TLS_GOTIE64
:
2688 r_type
= elf_s390_tls_transition (info
, r_type
, h
== NULL
);
2689 tls_type
= GOT_UNKNOWN
;
2690 if (h
== NULL
&& local_got_offsets
)
2691 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2694 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2695 if (!bfd_link_pic (info
) && h
->dynindx
== -1 && tls_type
>= GOT_TLS_IE
)
2696 r_type
= R_390_TLS_LE64
;
2698 if (r_type
== R_390_TLS_GD64
&& tls_type
>= GOT_TLS_IE
)
2699 r_type
= R_390_TLS_IE64
;
2701 if (r_type
== R_390_TLS_LE64
)
2703 /* This relocation gets optimized away by the local exec
2704 access optimization. */
2705 BFD_ASSERT (! unresolved_reloc
);
2706 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2707 contents
+ rel
->r_offset
);
2711 if (htab
->elf
.sgot
== NULL
)
2715 off
= h
->got
.offset
;
2718 if (local_got_offsets
== NULL
)
2721 off
= local_got_offsets
[r_symndx
];
2730 Elf_Internal_Rela outrel
;
2734 if (htab
->elf
.srelgot
== NULL
)
2737 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2738 + htab
->elf
.sgot
->output_offset
+ off
);
2740 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2741 if (r_type
== R_390_TLS_GD64
)
2742 dr_type
= R_390_TLS_DTPMOD
;
2744 dr_type
= R_390_TLS_TPOFF
;
2745 if (dr_type
== R_390_TLS_TPOFF
&& indx
== 0)
2746 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2748 outrel
.r_addend
= 0;
2749 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
2750 loc
= htab
->elf
.srelgot
->contents
;
2751 loc
+= htab
->elf
.srelgot
->reloc_count
++
2752 * sizeof (Elf64_External_Rela
);
2753 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2755 if (r_type
== R_390_TLS_GD64
)
2759 BFD_ASSERT (! unresolved_reloc
);
2760 bfd_put_64 (output_bfd
,
2761 relocation
- dtpoff_base (info
),
2762 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2766 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_DTPOFF
);
2767 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
2768 outrel
.r_addend
= 0;
2769 htab
->elf
.srelgot
->reloc_count
++;
2770 loc
+= sizeof (Elf64_External_Rela
);
2771 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2778 local_got_offsets
[r_symndx
] |= 1;
2781 if (off
>= (bfd_vma
) -2)
2783 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
2785 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2786 if (r_type
== R_390_TLS_IE64
|| r_type
== R_390_TLS_IEENT
)
2787 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2788 unresolved_reloc
= FALSE
;
2792 bfd_put_64 (output_bfd
, htab
->elf
.sgot
->output_offset
+ off
,
2793 contents
+ rel
->r_offset
);
2798 case R_390_TLS_GOTIE12
:
2799 case R_390_TLS_GOTIE20
:
2800 case R_390_TLS_IEENT
:
2803 if (local_got_offsets
== NULL
)
2805 off
= local_got_offsets
[r_symndx
];
2806 if (bfd_link_pic (info
))
2807 goto emit_tls_relocs
;
2811 off
= h
->got
.offset
;
2812 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2813 if (bfd_link_pic (info
) || h
->dynindx
!= -1 || tls_type
< GOT_TLS_IE
)
2814 goto emit_tls_relocs
;
2817 if (htab
->elf
.sgot
== NULL
)
2820 BFD_ASSERT (! unresolved_reloc
);
2821 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2822 htab
->elf
.sgot
->contents
+ off
);
2823 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2824 if (r_type
== R_390_TLS_IEENT
)
2825 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2826 unresolved_reloc
= FALSE
;
2829 case R_390_TLS_LDM64
:
2830 if (! bfd_link_pic (info
))
2831 /* The literal pool entry this relocation refers to gets ignored
2832 by the optimized code of the local exec model. Do nothing
2833 and the value will turn out zero. */
2836 if (htab
->elf
.sgot
== NULL
)
2839 off
= htab
->tls_ldm_got
.offset
;
2844 Elf_Internal_Rela outrel
;
2847 if (htab
->elf
.srelgot
== NULL
)
2850 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2851 + htab
->elf
.sgot
->output_offset
+ off
);
2853 bfd_put_64 (output_bfd
, 0,
2854 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2855 outrel
.r_info
= ELF64_R_INFO (0, R_390_TLS_DTPMOD
);
2856 outrel
.r_addend
= 0;
2857 loc
= htab
->elf
.srelgot
->contents
;
2858 loc
+= htab
->elf
.srelgot
->reloc_count
++
2859 * sizeof (Elf64_External_Rela
);
2860 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2861 htab
->tls_ldm_got
.offset
|= 1;
2863 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2864 unresolved_reloc
= FALSE
;
2867 case R_390_TLS_LE64
:
2868 if (bfd_link_dll (info
))
2870 /* Linking a shared library with non-fpic code requires
2871 a R_390_TLS_TPOFF relocation. */
2872 Elf_Internal_Rela outrel
;
2877 outrel
.r_offset
= rel
->r_offset
2878 + input_section
->output_section
->vma
2879 + input_section
->output_offset
;
2880 if (h
!= NULL
&& h
->dynindx
!= -1)
2884 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_TPOFF
);
2886 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2888 outrel
.r_addend
= 0;
2889 sreloc
= elf_section_data (input_section
)->sreloc
;
2892 loc
= sreloc
->contents
;
2893 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2894 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2898 BFD_ASSERT (! unresolved_reloc
);
2899 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2900 contents
+ rel
->r_offset
);
2904 case R_390_TLS_LDO64
:
2905 if (bfd_link_pic (info
) || (input_section
->flags
& SEC_DEBUGGING
))
2906 relocation
-= dtpoff_base (info
);
2908 /* When converting LDO to LE, we must negate. */
2909 relocation
= -tpoff (info
, relocation
);
2912 /* Relocations for tls instructions. */
2913 case R_390_TLS_LOAD
:
2914 case R_390_TLS_GDCALL
:
2915 case R_390_TLS_LDCALL
:
2916 tls_type
= GOT_UNKNOWN
;
2917 if (h
== NULL
&& local_got_offsets
)
2918 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2920 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2922 if (tls_type
== GOT_TLS_GD
)
2925 if (r_type
== R_390_TLS_LOAD
)
2927 if (!bfd_link_pic (info
) && (h
== NULL
|| h
->dynindx
== -1))
2929 /* IE->LE transition. Four valid cases:
2930 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2931 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2932 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2933 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2934 unsigned int insn0
, insn1
, ry
;
2936 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2937 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
2938 if (insn1
!= 0x0004)
2940 invalid_tls_insn (input_bfd
, input_section
, rel
);
2943 if ((insn0
& 0xff00f000) == 0xe3000000)
2944 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2945 ry
= (insn0
& 0x000f0000);
2946 else if ((insn0
& 0xff0f0000) == 0xe3000000)
2947 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2948 ry
= (insn0
& 0x0000f000) << 4;
2949 else if ((insn0
& 0xff00f000) == 0xe300c000)
2950 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2951 ry
= (insn0
& 0x000f0000);
2952 else if ((insn0
& 0xff0f0000) == 0xe30c0000)
2953 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2954 ry
= (insn0
& 0x0000f000) << 4;
2957 invalid_tls_insn (input_bfd
, input_section
, rel
);
2960 insn0
= 0xeb000000 | (insn0
& 0x00f00000) | ry
;
2962 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
2963 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
2966 else if (r_type
== R_390_TLS_GDCALL
)
2968 unsigned int insn0
, insn1
;
2970 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2971 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
2972 if ((insn0
& 0xffff0000) != 0xc0e50000)
2974 invalid_tls_insn (input_bfd
, input_section
, rel
);
2977 if (!bfd_link_pic (info
) && (h
== NULL
|| h
->dynindx
== -1))
2979 /* GD->LE transition.
2980 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2986 /* GD->IE transition.
2987 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2991 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
2992 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
2994 else if (r_type
== R_390_TLS_LDCALL
)
2996 if (!bfd_link_pic (info
))
2998 unsigned int insn0
, insn1
;
3000 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3001 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3002 if ((insn0
& 0xffff0000) != 0xc0e50000)
3004 invalid_tls_insn (input_bfd
, input_section
, rel
);
3007 /* LD->LE transition.
3008 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3011 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3012 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3021 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3022 because such sections are not SEC_ALLOC and thus ld.so will
3023 not process them. */
3024 if (unresolved_reloc
3025 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3027 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3028 rel
->r_offset
) != (bfd_vma
) -1)
3030 /* xgettext:c-format */
3031 (_("%pB(%pA+%#" PRIx64
"): "
3032 "unresolvable %s relocation against symbol `%s'"),
3035 (uint64_t) rel
->r_offset
,
3037 h
->root
.root
.string
);
3041 /* When applying a 24 bit reloc we need to start one byte
3042 earlier. Otherwise the 32 bit get/put bfd operations might
3043 access a byte after the actual section. */
3044 if (r_type
== R_390_PC24DBL
3045 || r_type
== R_390_PLT24DBL
)
3048 if (r_type
== R_390_20
3049 || r_type
== R_390_GOT20
3050 || r_type
== R_390_GOTPLT20
3051 || r_type
== R_390_TLS_GOTIE20
)
3053 relocation
+= rel
->r_addend
;
3054 relocation
= (relocation
&0xfff) << 8 | (relocation
&0xff000) >> 12;
3055 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3056 contents
, rel
->r_offset
,
3060 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3061 contents
, rel
->r_offset
,
3062 relocation
, rel
->r_addend
);
3064 if (r
!= bfd_reloc_ok
)
3069 name
= h
->root
.root
.string
;
3072 name
= bfd_elf_string_from_elf_section (input_bfd
,
3073 symtab_hdr
->sh_link
,
3078 name
= bfd_section_name (sec
);
3081 if (r
== bfd_reloc_overflow
)
3082 (*info
->callbacks
->reloc_overflow
)
3083 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3084 (bfd_vma
) 0, input_bfd
, input_section
, rel
->r_offset
);
3088 /* xgettext:c-format */
3089 (_("%pB(%pA+%#" PRIx64
"): reloc against `%s': error %d"),
3090 input_bfd
, input_section
,
3091 (uint64_t) rel
->r_offset
, name
, (int) r
);
3100 /* Generate the PLT slots together with the dynamic relocations needed
3101 for IFUNC symbols. */
3104 elf_s390_finish_ifunc_symbol (bfd
*output_bfd
,
3105 struct bfd_link_info
*info
,
3106 struct elf_link_hash_entry
*h
,
3107 struct elf_s390_link_hash_table
*htab
,
3109 bfd_vma resolver_address
)
3113 Elf_Internal_Rela rela
;
3115 asection
*plt
, *gotplt
, *relplt
;
3117 if (htab
->elf
.iplt
== NULL
3118 || htab
->elf
.igotplt
== NULL
3119 || htab
->elf
.irelplt
== NULL
)
3122 /* Index of the PLT slot within iplt section. */
3123 plt_index
= plt_offset
/ PLT_ENTRY_SIZE
;
3124 plt
= htab
->elf
.iplt
;
3125 /* Offset into the igot.plt section. */
3126 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3127 gotplt
= htab
->elf
.igotplt
;
3128 relplt
= htab
->elf
.irelplt
;
3130 /* Fill in the blueprint of a PLT. */
3131 memcpy (plt
->contents
+ plt_offset
, elf_s390x_plt_entry
,
3134 /* Fixup the relative address to the GOT entry */
3135 bfd_put_32 (output_bfd
,
3136 (gotplt
->output_section
->vma
+
3137 gotplt
->output_offset
+ got_offset
3138 - (plt
->output_section
->vma
+
3139 plt
->output_offset
+
3141 plt
->contents
+ plt_offset
+ 2);
3142 /* Fixup the relative branch to PLT 0 */
3143 bfd_put_32 (output_bfd
, - (plt
->output_offset
+
3144 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3145 plt
->contents
+ plt_offset
+ 24);
3146 /* Fixup offset into .rela.plt section. */
3147 bfd_put_32 (output_bfd
, relplt
->output_offset
+
3148 plt_index
* sizeof (Elf64_External_Rela
),
3149 plt
->contents
+ plt_offset
+ 28);
3151 /* Fill in the entry in the global offset table.
3152 Points to instruction after GOT offset. */
3153 bfd_put_64 (output_bfd
,
3154 (plt
->output_section
->vma
3155 + plt
->output_offset
3158 gotplt
->contents
+ got_offset
);
3160 /* Fill in the entry in the .rela.plt section. */
3161 rela
.r_offset
= (gotplt
->output_section
->vma
3162 + gotplt
->output_offset
3167 || ((bfd_link_executable (info
)
3168 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
3171 /* The symbol can be locally resolved. */
3172 rela
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
3173 rela
.r_addend
= resolver_address
;
3177 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3181 loc
= relplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
3182 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3186 /* Finish up dynamic symbol handling. We set the contents of various
3187 dynamic sections here. */
3190 elf_s390_finish_dynamic_symbol (bfd
*output_bfd
,
3191 struct bfd_link_info
*info
,
3192 struct elf_link_hash_entry
*h
,
3193 Elf_Internal_Sym
*sym
)
3195 struct elf_s390_link_hash_table
*htab
;
3196 struct elf_s390_link_hash_entry
*eh
= (struct elf_s390_link_hash_entry
*)h
;
3198 htab
= elf_s390_hash_table (info
);
3202 if (h
->plt
.offset
!= (bfd_vma
) -1)
3205 bfd_vma gotplt_offset
;
3206 Elf_Internal_Rela rela
;
3209 /* This symbol has an entry in the procedure linkage table. Set
3211 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
3213 elf_s390_finish_ifunc_symbol (output_bfd
, info
, h
,
3214 htab
, h
->plt
.offset
,
3215 eh
->ifunc_resolver_address
+
3216 eh
->ifunc_resolver_section
->output_offset
+
3217 eh
->ifunc_resolver_section
->output_section
->vma
);
3219 /* Do not return yet. Handling of explicit GOT slots of
3220 IFUNC symbols is below. */
3224 if (h
->dynindx
== -1
3225 || htab
->elf
.splt
== NULL
3226 || htab
->elf
.sgotplt
== NULL
3227 || htab
->elf
.srelplt
== NULL
)
3231 Current offset - size first entry / entry size. */
3232 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3234 /* The slots in the .got.plt correspond to the PLT slots in
3236 gotplt_offset
= plt_index
* GOT_ENTRY_SIZE
;
3238 /* If .got.plt comes first it needs to contain the 3 header
3240 if (!s390_gotplt_after_got_p (info
))
3241 gotplt_offset
+= 3 * GOT_ENTRY_SIZE
;
3243 /* Fill in the blueprint of a PLT. */
3244 memcpy (htab
->elf
.splt
->contents
+ h
->plt
.offset
, elf_s390x_plt_entry
,
3247 /* The first instruction in the PLT entry is a LARL loading
3248 the address of the GOT slot. We write the 4 byte
3249 immediate operand of the LARL instruction here. */
3250 bfd_put_32 (output_bfd
,
3251 (htab
->elf
.sgotplt
->output_section
->vma
+
3252 htab
->elf
.sgotplt
->output_offset
+ gotplt_offset
3253 - (htab
->elf
.splt
->output_section
->vma
+
3254 htab
->elf
.splt
->output_offset
+
3256 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 2);
3257 /* Fixup the relative branch to PLT 0 */
3258 bfd_put_32 (output_bfd
, - (PLT_FIRST_ENTRY_SIZE
+
3259 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3260 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 24);
3261 /* Fixup offset into .rela.plt section. */
3262 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf64_External_Rela
),
3263 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 28);
3265 /* Fill in the entry in the global offset table.
3266 Points to instruction after GOT offset. */
3267 bfd_put_64 (output_bfd
,
3268 (htab
->elf
.splt
->output_section
->vma
3269 + htab
->elf
.splt
->output_offset
3272 htab
->elf
.sgotplt
->contents
+ gotplt_offset
);
3274 /* Fill in the entry in the .rela.plt section. */
3275 rela
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3276 + htab
->elf
.sgotplt
->output_offset
3278 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3280 loc
= htab
->elf
.srelplt
->contents
+ plt_index
*
3281 sizeof (Elf64_External_Rela
);
3282 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3284 if (!h
->def_regular
)
3286 /* Mark the symbol as undefined, rather than as defined in
3287 the .plt section. Leave the value alone. This is a clue
3288 for the dynamic linker, to make function pointer
3289 comparisons work between an application and shared
3291 sym
->st_shndx
= SHN_UNDEF
;
3296 if (h
->got
.offset
!= (bfd_vma
) -1
3297 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3298 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE
3299 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE_NLT
)
3301 Elf_Internal_Rela rela
;
3304 /* This symbol has an entry in the global offset table. Set it
3306 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
3309 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3310 + htab
->elf
.sgot
->output_offset
3311 + (h
->got
.offset
&~ (bfd_vma
) 1));
3313 if (h
->def_regular
&& s390_is_ifunc_symbol_p (h
))
3315 if (bfd_link_pic (info
))
3317 /* An explicit GOT slot usage needs GLOB_DAT. If the
3318 symbol references local the implicit got.iplt slot
3319 will be used and the IRELATIVE reloc has been created
3325 /* For non-shared objects explicit GOT slots must be
3326 filled with the PLT slot address for pointer
3327 equality reasons. */
3328 bfd_put_64 (output_bfd
, (htab
->elf
.iplt
->output_section
->vma
3329 + htab
->elf
.iplt
->output_offset
3331 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3335 else if (bfd_link_pic (info
)
3336 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3338 if (UNDEFWEAK_NO_DYNAMIC_RELOC (info
, h
))
3341 /* If this is a static link, or it is a -Bsymbolic link and
3342 the symbol is defined locally or was forced to be local
3343 because of a version file, we just want to emit a
3344 RELATIVE reloc. The entry in the global offset table
3345 will already have been initialized in the
3346 relocate_section function. */
3347 if (!(h
->def_regular
|| ELF_COMMON_DEF_P (h
)))
3349 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3350 rela
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
3351 rela
.r_addend
= (h
->root
.u
.def
.value
3352 + h
->root
.u
.def
.section
->output_section
->vma
3353 + h
->root
.u
.def
.section
->output_offset
);
3357 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3359 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3360 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_GLOB_DAT
);
3364 loc
= htab
->elf
.srelgot
->contents
;
3365 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3366 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3371 Elf_Internal_Rela rela
;
3375 /* This symbols needs a copy reloc. Set it up. */
3377 if (h
->dynindx
== -1
3378 || (h
->root
.type
!= bfd_link_hash_defined
3379 && h
->root
.type
!= bfd_link_hash_defweak
)
3380 || htab
->elf
.srelbss
== NULL
)
3383 rela
.r_offset
= (h
->root
.u
.def
.value
3384 + h
->root
.u
.def
.section
->output_section
->vma
3385 + h
->root
.u
.def
.section
->output_offset
);
3386 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_COPY
);
3388 if (h
->root
.u
.def
.section
== htab
->elf
.sdynrelro
)
3389 s
= htab
->elf
.sreldynrelro
;
3391 s
= htab
->elf
.srelbss
;
3392 loc
= s
->contents
+ s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3393 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3396 /* Mark some specially defined symbols as absolute. */
3397 if (h
== htab
->elf
.hdynamic
3398 || h
== htab
->elf
.hgot
3399 || h
== htab
->elf
.hplt
)
3400 sym
->st_shndx
= SHN_ABS
;
3405 /* Used to decide how to sort relocs in an optimal manner for the
3406 dynamic linker, before writing them out. */
3408 static enum elf_reloc_type_class
3409 elf_s390_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3410 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3411 const Elf_Internal_Rela
*rela
)
3413 bfd
*abfd
= info
->output_bfd
;
3414 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3415 struct elf_s390_link_hash_table
*htab
= elf_s390_hash_table (info
);
3416 unsigned long r_symndx
= ELF64_R_SYM (rela
->r_info
);
3417 Elf_Internal_Sym sym
;
3419 if (htab
->elf
.dynsym
== NULL
3420 || !bed
->s
->swap_symbol_in (abfd
,
3421 (htab
->elf
.dynsym
->contents
3422 + r_symndx
* bed
->s
->sizeof_sym
),
3426 /* Check relocation against STT_GNU_IFUNC symbol. */
3427 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
3428 return reloc_class_ifunc
;
3430 switch ((int) ELF64_R_TYPE (rela
->r_info
))
3432 case R_390_RELATIVE
:
3433 return reloc_class_relative
;
3434 case R_390_JMP_SLOT
:
3435 return reloc_class_plt
;
3437 return reloc_class_copy
;
3439 return reloc_class_normal
;
3443 /* Finish up the dynamic sections. */
3446 elf_s390_finish_dynamic_sections (bfd
*output_bfd
,
3447 struct bfd_link_info
*info
)
3449 struct elf_s390_link_hash_table
*htab
;
3455 htab
= elf_s390_hash_table (info
);
3459 dynobj
= htab
->elf
.dynobj
;
3460 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3462 if (htab
->elf
.dynamic_sections_created
)
3464 Elf64_External_Dyn
*dyncon
, *dynconend
;
3466 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
3469 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
3470 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3471 for (; dyncon
< dynconend
; dyncon
++)
3473 Elf_Internal_Dyn dyn
;
3476 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3484 /* DT_PLTGOT matches _GLOBAL_OFFSET_TABLE_ */
3485 dyn
.d_un
.d_ptr
= s390_got_pointer (info
);
3489 s
= htab
->elf
.srelplt
;
3490 dyn
.d_un
.d_ptr
= s
->output_section
->vma
+ s
->output_offset
;
3494 dyn
.d_un
.d_val
= htab
->elf
.srelplt
->size
;
3495 if (htab
->elf
.irelplt
)
3496 dyn
.d_un
.d_val
+= htab
->elf
.irelplt
->size
;
3500 /* The procedure linkage table relocs (DT_JMPREL) should
3501 not be included in the overall relocs (DT_RELA).
3502 Therefore, we override the DT_RELASZ entry here to
3503 make it not include the JMPREL relocs. Since the
3504 linker script arranges for .rela.plt to follow all
3505 other relocation sections, we don't have to worry
3506 about changing the DT_RELA entry. */
3507 dyn
.d_un
.d_val
-= htab
->elf
.srelplt
->size
;
3508 if (htab
->elf
.irelplt
)
3509 dyn
.d_un
.d_val
-= htab
->elf
.irelplt
->size
;
3513 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3516 /* Fill in the special first entry in the procedure linkage table. */
3517 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
3519 /* fill in blueprint for plt 0 entry */
3520 memcpy (htab
->elf
.splt
->contents
, elf_s390x_first_plt_entry
,
3521 PLT_FIRST_ENTRY_SIZE
);
3522 /* The second instruction in the first PLT entry is a LARL
3523 loading the GOT pointer. Fill in the LARL immediate
3525 bfd_put_32 (output_bfd
,
3526 (s390_got_pointer (info
)
3527 - htab
->elf
.splt
->output_section
->vma
3528 - htab
->elf
.splt
->output_offset
- 6)/2,
3529 htab
->elf
.splt
->contents
+ 8);
3531 if (elf_section_data (htab
->elf
.splt
->output_section
) != NULL
)
3532 elf_section_data (htab
->elf
.splt
->output_section
)->this_hdr
.sh_entsize
3536 if (htab
->elf
.hgot
&& htab
->elf
.hgot
->root
.u
.def
.section
)
3538 /* Fill in the first three entries in the global offset table. */
3539 if (htab
->elf
.hgot
->root
.u
.def
.section
->size
> 0)
3541 bfd_put_64 (output_bfd
,
3542 (sdyn
== NULL
? (bfd_vma
) 0
3543 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3544 htab
->elf
.hgot
->root
.u
.def
.section
->contents
);
3545 /* One entry for shared object struct ptr. */
3546 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
3547 htab
->elf
.hgot
->root
.u
.def
.section
->contents
+ 8);
3548 /* One entry for _dl_runtime_resolve. */
3549 bfd_put_64 (output_bfd
, (bfd_vma
) 0,
3550 htab
->elf
.hgot
->root
.u
.def
.section
->contents
+ 16);
3552 elf_section_data (htab
->elf
.sgot
->output_section
)
3553 ->this_hdr
.sh_entsize
= 8;
3556 /* Finish dynamic symbol for local IFUNC symbols. */
3557 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3559 struct plt_entry
*local_plt
;
3560 Elf_Internal_Sym
*isym
;
3561 Elf_Internal_Shdr
*symtab_hdr
;
3563 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3565 if (!is_s390_elf (ibfd
))
3568 local_plt
= elf_s390_local_plt (ibfd
);
3569 if (local_plt
!= NULL
)
3570 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
3572 if (local_plt
[i
].plt
.offset
!= (bfd_vma
) -1)
3574 asection
*sec
= local_plt
[i
].sec
;
3575 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, i
);
3579 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3580 elf_s390_finish_ifunc_symbol (output_bfd
, info
, NULL
, htab
,
3581 local_plt
[i
].plt
.offset
,
3583 + sec
->output_section
->vma
3584 + sec
->output_offset
);
3593 /* Support for core dump NOTE sections. */
3596 elf_s390_grok_prstatus (bfd
*abfd
, Elf_Internal_Note
*note
)
3601 switch (note
->descsz
)
3606 case 336: /* sizeof(struct elf_prstatus) on s390x */
3608 elf_tdata (abfd
)->core
->signal
= bfd_get_16 (abfd
, note
->descdata
+ 12);
3611 elf_tdata (abfd
)->core
->lwpid
= bfd_get_32 (abfd
, note
->descdata
+ 32);
3619 /* Make a ".reg/999" section. */
3620 return _bfd_elfcore_make_pseudosection (abfd
, ".reg",
3621 size
, note
->descpos
+ offset
);
3625 elf_s390_grok_psinfo (bfd
*abfd
, Elf_Internal_Note
*note
)
3627 switch (note
->descsz
)
3632 case 136: /* sizeof(struct elf_prpsinfo) on s390x */
3633 elf_tdata (abfd
)->core
->pid
3634 = bfd_get_32 (abfd
, note
->descdata
+ 24);
3635 elf_tdata (abfd
)->core
->program
3636 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 40, 16);
3637 elf_tdata (abfd
)->core
->command
3638 = _bfd_elfcore_strndup (abfd
, note
->descdata
+ 56, 80);
3641 /* Note that for some reason, a spurious space is tacked
3642 onto the end of the args in some (at least one anyway)
3643 implementations, so strip it off if it exists. */
3646 char *command
= elf_tdata (abfd
)->core
->command
;
3647 int n
= strlen (command
);
3649 if (0 < n
&& command
[n
- 1] == ' ')
3650 command
[n
- 1] = '\0';
3657 elf_s390_write_core_note (bfd
*abfd
, char *buf
, int *bufsiz
,
3669 char data
[136] ATTRIBUTE_NONSTRING
= { 0 };
3670 const char *fname
, *psargs
;
3672 va_start (ap
, note_type
);
3673 fname
= va_arg (ap
, const char *);
3674 psargs
= va_arg (ap
, const char *);
3677 strncpy (data
+ 40, fname
, 16);
3678 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3680 /* GCC 8.0 and 8.1 warn about 80 equals destination size with
3681 -Wstringop-truncation:
3682 https://gcc.gnu.org/bugzilla/show_bug.cgi?id=85643
3684 DIAGNOSTIC_IGNORE_STRINGOP_TRUNCATION
;
3686 strncpy (data
+ 56, psargs
, 80);
3687 #if GCC_VERSION == 8000 || GCC_VERSION == 8001
3690 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
3691 &data
, sizeof (data
));
3696 char data
[336] = { 0 };
3701 va_start (ap
, note_type
);
3702 pid
= va_arg (ap
, long);
3703 cursig
= va_arg (ap
, int);
3704 gregs
= va_arg (ap
, const void *);
3707 bfd_put_16 (abfd
, cursig
, data
+ 12);
3708 bfd_put_32 (abfd
, pid
, data
+ 32);
3709 memcpy (data
+ 112, gregs
, 216);
3710 return elfcore_write_note (abfd
, buf
, bufsiz
, "CORE", note_type
,
3711 &data
, sizeof (data
));
3717 /* Return address for Ith PLT stub in section PLT, for relocation REL
3718 or (bfd_vma) -1 if it should not be included. */
3721 elf_s390_plt_sym_val (bfd_vma i
, const asection
*plt
,
3722 const arelent
*rel ATTRIBUTE_UNUSED
)
3724 return plt
->vma
+ PLT_FIRST_ENTRY_SIZE
+ i
* PLT_ENTRY_SIZE
;
3727 /* Merge backend specific data from an object file to the output
3728 object file when linking. */
3731 elf64_s390_merge_private_bfd_data (bfd
*ibfd
, struct bfd_link_info
*info
)
3733 if (!is_s390_elf (ibfd
) || !is_s390_elf (info
->output_bfd
))
3736 return elf_s390_merge_obj_attributes (ibfd
, info
);
3739 /* We may add a PT_S390_PGSTE program header. */
3742 elf_s390_additional_program_headers (bfd
*abfd ATTRIBUTE_UNUSED
,
3743 struct bfd_link_info
*info
)
3745 struct elf_s390_link_hash_table
*htab
;
3749 htab
= elf_s390_hash_table (info
);
3751 return htab
->params
->pgste
;
3757 /* Add the PT_S390_PGSTE program header. */
3760 elf_s390_modify_segment_map (bfd
*abfd
, struct bfd_link_info
*info
)
3762 struct elf_s390_link_hash_table
*htab
;
3763 struct elf_segment_map
*m
, *pm
= NULL
;
3768 htab
= elf_s390_hash_table (info
);
3769 if (!htab
|| !htab
->params
->pgste
)
3772 /* If there is already a PT_S390_PGSTE header, avoid adding
3774 m
= elf_seg_map (abfd
);
3775 while (m
&& m
->p_type
!= PT_S390_PGSTE
)
3784 m
= (struct elf_segment_map
*)
3785 bfd_zalloc (abfd
, sizeof (struct elf_segment_map
));
3788 m
->p_type
= PT_S390_PGSTE
;
3798 bfd_elf_s390_set_options (struct bfd_link_info
*info
,
3799 struct s390_elf_params
*params
)
3801 struct elf_s390_link_hash_table
*htab
;
3805 htab
= elf_s390_hash_table (info
);
3807 htab
->params
= params
;
3814 /* Why was the hash table entry size definition changed from
3815 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3816 this is the only reason for the s390_elf64_size_info structure. */
3818 const struct elf_size_info s390_elf64_size_info
=
3820 sizeof (Elf64_External_Ehdr
),
3821 sizeof (Elf64_External_Phdr
),
3822 sizeof (Elf64_External_Shdr
),
3823 sizeof (Elf64_External_Rel
),
3824 sizeof (Elf64_External_Rela
),
3825 sizeof (Elf64_External_Sym
),
3826 sizeof (Elf64_External_Dyn
),
3827 sizeof (Elf_External_Note
),
3828 8, /* hash-table entry size. */
3829 1, /* internal relocations per external relocations. */
3830 64, /* arch_size. */
3831 3, /* log_file_align. */
3832 ELFCLASS64
, EV_CURRENT
,
3833 bfd_elf64_write_out_phdrs
,
3834 bfd_elf64_write_shdrs_and_ehdr
,
3835 bfd_elf64_checksum_contents
,
3836 bfd_elf64_write_relocs
,
3837 bfd_elf64_swap_symbol_in
,
3838 bfd_elf64_swap_symbol_out
,
3839 bfd_elf64_slurp_reloc_table
,
3840 bfd_elf64_slurp_symbol_table
,
3841 bfd_elf64_swap_dyn_in
,
3842 bfd_elf64_swap_dyn_out
,
3843 bfd_elf64_swap_reloc_in
,
3844 bfd_elf64_swap_reloc_out
,
3845 bfd_elf64_swap_reloca_in
,
3846 bfd_elf64_swap_reloca_out
3849 #define TARGET_BIG_SYM s390_elf64_vec
3850 #define TARGET_BIG_NAME "elf64-s390"
3851 #define ELF_ARCH bfd_arch_s390
3852 #define ELF_TARGET_ID S390_ELF_DATA
3853 #define ELF_MACHINE_CODE EM_S390
3854 #define ELF_MACHINE_ALT1 EM_S390_OLD
3855 #define ELF_MAXPAGESIZE 0x1000
3857 #define elf_backend_size_info s390_elf64_size_info
3859 #define elf_backend_can_gc_sections 1
3860 #define elf_backend_can_refcount 1
3861 #define elf_backend_want_got_plt 1
3862 #define elf_backend_plt_readonly 1
3863 #define elf_backend_want_plt_sym 0
3864 #define elf_backend_got_header_size 24
3865 #define elf_backend_want_dynrelro 1
3866 #define elf_backend_rela_normal 1
3868 #define elf_info_to_howto elf_s390_info_to_howto
3870 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3871 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3872 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3873 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3874 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3876 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3877 #define elf_backend_check_relocs elf_s390_check_relocs
3878 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3879 #define elf_backend_create_dynamic_sections _bfd_elf_create_dynamic_sections
3880 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3881 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3882 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3883 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3884 #define elf_backend_relocate_section elf_s390_relocate_section
3885 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3886 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3887 #define elf_backend_grok_prstatus elf_s390_grok_prstatus
3888 #define elf_backend_grok_psinfo elf_s390_grok_psinfo
3889 #define elf_backend_write_core_note elf_s390_write_core_note
3890 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3891 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3892 #define elf_backend_additional_program_headers elf_s390_additional_program_headers
3893 #define elf_backend_modify_segment_map elf_s390_modify_segment_map
3895 #define bfd_elf64_mkobject elf_s390_mkobject
3896 #define elf_backend_object_p elf_s390_object_p
3898 #include "elf64-target.h"