1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright (C) 2000-2015 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
29 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
30 from smaller values. Start with zero, widen, *then* decrement. */
31 #define MINUS_ONE (((bfd_vma)0) - 1)
33 static bfd_reloc_status_type
34 s390_tls_reloc (bfd
*, arelent
*, asymbol
*, void *,
35 asection
*, bfd
*, char **);
36 static bfd_reloc_status_type
37 s390_elf_ldisp_reloc (bfd
*, arelent
*, asymbol
*, void *,
38 asection
*, bfd
*, char **);
40 /* The relocation "howto" table. */
41 static reloc_howto_type elf_howto_table
[] =
43 HOWTO (R_390_NONE
, /* type */
45 3, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
47 FALSE
, /* pc_relative */
49 complain_overflow_dont
, /* complain_on_overflow */
50 bfd_elf_generic_reloc
, /* special_function */
51 "R_390_NONE", /* name */
52 FALSE
, /* partial_inplace */
55 FALSE
), /* pcrel_offset */
57 HOWTO(R_390_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
58 bfd_elf_generic_reloc
, "R_390_8", FALSE
, 0,0x000000ff, FALSE
),
59 HOWTO(R_390_12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
60 bfd_elf_generic_reloc
, "R_390_12", FALSE
, 0,0x00000fff, FALSE
),
61 HOWTO(R_390_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
62 bfd_elf_generic_reloc
, "R_390_16", FALSE
, 0,0x0000ffff, FALSE
),
63 HOWTO(R_390_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
64 bfd_elf_generic_reloc
, "R_390_32", FALSE
, 0,0xffffffff, FALSE
),
65 HOWTO(R_390_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
66 bfd_elf_generic_reloc
, "R_390_PC32", FALSE
, 0,0xffffffff, TRUE
),
67 HOWTO(R_390_GOT12
, 0, 1, 12, FALSE
, 0, complain_overflow_bitfield
,
68 bfd_elf_generic_reloc
, "R_390_GOT12", FALSE
, 0,0x00000fff, FALSE
),
69 HOWTO(R_390_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
70 bfd_elf_generic_reloc
, "R_390_GOT32", FALSE
, 0,0xffffffff, FALSE
),
71 HOWTO(R_390_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
72 bfd_elf_generic_reloc
, "R_390_PLT32", FALSE
, 0,0xffffffff, TRUE
),
73 HOWTO(R_390_COPY
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
74 bfd_elf_generic_reloc
, "R_390_COPY", FALSE
, 0,MINUS_ONE
, FALSE
),
75 HOWTO(R_390_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
76 bfd_elf_generic_reloc
, "R_390_GLOB_DAT", FALSE
, 0,MINUS_ONE
, FALSE
),
77 HOWTO(R_390_JMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
78 bfd_elf_generic_reloc
, "R_390_JMP_SLOT", FALSE
, 0,MINUS_ONE
, FALSE
),
79 HOWTO(R_390_RELATIVE
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
80 bfd_elf_generic_reloc
, "R_390_RELATIVE", FALSE
, 0,MINUS_ONE
, FALSE
),
81 HOWTO(R_390_GOTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
82 bfd_elf_generic_reloc
, "R_390_GOTOFF32", FALSE
, 0,MINUS_ONE
, FALSE
),
83 HOWTO(R_390_GOTPC
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
84 bfd_elf_generic_reloc
, "R_390_GOTPC", FALSE
, 0,MINUS_ONE
, TRUE
),
85 HOWTO(R_390_GOT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
86 bfd_elf_generic_reloc
, "R_390_GOT16", FALSE
, 0,0x0000ffff, FALSE
),
87 HOWTO(R_390_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
88 bfd_elf_generic_reloc
, "R_390_PC16", FALSE
, 0,0x0000ffff, TRUE
),
89 HOWTO(R_390_PC16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
90 bfd_elf_generic_reloc
, "R_390_PC16DBL", FALSE
, 0,0x0000ffff, TRUE
),
91 HOWTO(R_390_PLT16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
92 bfd_elf_generic_reloc
, "R_390_PLT16DBL", FALSE
, 0,0x0000ffff, TRUE
),
93 HOWTO(R_390_PC32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
94 bfd_elf_generic_reloc
, "R_390_PC32DBL", FALSE
, 0,0xffffffff, TRUE
),
95 HOWTO(R_390_PLT32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
96 bfd_elf_generic_reloc
, "R_390_PLT32DBL", FALSE
, 0,0xffffffff, TRUE
),
97 HOWTO(R_390_GOTPCDBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
98 bfd_elf_generic_reloc
, "R_390_GOTPCDBL", FALSE
, 0,MINUS_ONE
, TRUE
),
99 HOWTO(R_390_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
100 bfd_elf_generic_reloc
, "R_390_64", FALSE
, 0,MINUS_ONE
, FALSE
),
101 HOWTO(R_390_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
102 bfd_elf_generic_reloc
, "R_390_PC64", FALSE
, 0,MINUS_ONE
, TRUE
),
103 HOWTO(R_390_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
104 bfd_elf_generic_reloc
, "R_390_GOT64", FALSE
, 0,MINUS_ONE
, FALSE
),
105 HOWTO(R_390_PLT64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
106 bfd_elf_generic_reloc
, "R_390_PLT64", FALSE
, 0,MINUS_ONE
, TRUE
),
107 HOWTO(R_390_GOTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
108 bfd_elf_generic_reloc
, "R_390_GOTENT", FALSE
, 0,MINUS_ONE
, TRUE
),
109 HOWTO(R_390_GOTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
110 bfd_elf_generic_reloc
, "R_390_GOTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
111 HOWTO(R_390_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
112 bfd_elf_generic_reloc
, "R_390_GOTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
113 HOWTO(R_390_GOTPLT12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
114 bfd_elf_generic_reloc
, "R_390_GOTPLT12", FALSE
, 0,0x00000fff, FALSE
),
115 HOWTO(R_390_GOTPLT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
116 bfd_elf_generic_reloc
, "R_390_GOTPLT16", FALSE
, 0,0x0000ffff, FALSE
),
117 HOWTO(R_390_GOTPLT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
118 bfd_elf_generic_reloc
, "R_390_GOTPLT32", FALSE
, 0,0xffffffff, FALSE
),
119 HOWTO(R_390_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_390_GOTPLT64", FALSE
, 0,MINUS_ONE
, FALSE
),
121 HOWTO(R_390_GOTPLTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_390_GOTPLTENT",FALSE
, 0,MINUS_ONE
, TRUE
),
123 HOWTO(R_390_PLTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_390_PLTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
125 HOWTO(R_390_PLTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_390_PLTOFF32", FALSE
, 0,0xffffffff, FALSE
),
127 HOWTO(R_390_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_390_PLTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
129 HOWTO(R_390_TLS_LOAD
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
130 s390_tls_reloc
, "R_390_TLS_LOAD", FALSE
, 0, 0, FALSE
),
131 HOWTO(R_390_TLS_GDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
132 s390_tls_reloc
, "R_390_TLS_GDCALL", FALSE
, 0, 0, FALSE
),
133 HOWTO(R_390_TLS_LDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
134 s390_tls_reloc
, "R_390_TLS_LDCALL", FALSE
, 0, 0, FALSE
),
135 EMPTY_HOWTO (R_390_TLS_GD32
), /* Empty entry for R_390_TLS_GD32. */
136 HOWTO(R_390_TLS_GD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
137 bfd_elf_generic_reloc
, "R_390_TLS_GD64", FALSE
, 0, MINUS_ONE
, FALSE
),
138 HOWTO(R_390_TLS_GOTIE12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
139 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE12", FALSE
, 0, 0x00000fff, FALSE
),
140 EMPTY_HOWTO (R_390_TLS_GOTIE32
), /* Empty entry for R_390_TLS_GOTIE32. */
141 HOWTO(R_390_TLS_GOTIE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
142 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE64", FALSE
, 0, MINUS_ONE
, FALSE
),
143 EMPTY_HOWTO (R_390_TLS_LDM32
), /* Empty entry for R_390_TLS_LDM32. */
144 HOWTO(R_390_TLS_LDM64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
145 bfd_elf_generic_reloc
, "R_390_TLS_LDM64", FALSE
, 0, MINUS_ONE
, FALSE
),
146 EMPTY_HOWTO (R_390_TLS_IE32
), /* Empty entry for R_390_TLS_IE32. */
147 HOWTO(R_390_TLS_IE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
148 bfd_elf_generic_reloc
, "R_390_TLS_IE64", FALSE
, 0, MINUS_ONE
, FALSE
),
149 HOWTO(R_390_TLS_IEENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
150 bfd_elf_generic_reloc
, "R_390_TLS_IEENT", FALSE
, 0, MINUS_ONE
, TRUE
),
151 EMPTY_HOWTO (R_390_TLS_LE32
), /* Empty entry for R_390_TLS_LE32. */
152 HOWTO(R_390_TLS_LE64
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
153 bfd_elf_generic_reloc
, "R_390_TLS_LE64", FALSE
, 0, MINUS_ONE
, FALSE
),
154 EMPTY_HOWTO (R_390_TLS_LDO32
), /* Empty entry for R_390_TLS_LDO32. */
155 HOWTO(R_390_TLS_LDO64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
156 bfd_elf_generic_reloc
, "R_390_TLS_LDO64", FALSE
, 0, MINUS_ONE
, FALSE
),
157 HOWTO(R_390_TLS_DTPMOD
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
158 bfd_elf_generic_reloc
, "R_390_TLS_DTPMOD", FALSE
, 0, MINUS_ONE
, FALSE
),
159 HOWTO(R_390_TLS_DTPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
160 bfd_elf_generic_reloc
, "R_390_TLS_DTPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
161 HOWTO(R_390_TLS_TPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
162 bfd_elf_generic_reloc
, "R_390_TLS_TPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
163 HOWTO(R_390_20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
164 s390_elf_ldisp_reloc
, "R_390_20", FALSE
, 0,0x0fffff00, FALSE
),
165 HOWTO(R_390_GOT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
166 s390_elf_ldisp_reloc
, "R_390_GOT20", FALSE
, 0,0x0fffff00, FALSE
),
167 HOWTO(R_390_GOTPLT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
168 s390_elf_ldisp_reloc
, "R_390_GOTPLT20", FALSE
, 0,0x0fffff00, FALSE
),
169 HOWTO(R_390_TLS_GOTIE20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
170 s390_elf_ldisp_reloc
, "R_390_TLS_GOTIE20", FALSE
, 0,0x0fffff00, FALSE
),
171 HOWTO(R_390_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
172 bfd_elf_generic_reloc
, "R_390_IRELATIVE", FALSE
, 0, MINUS_ONE
, FALSE
),
173 HOWTO(R_390_PC12DBL
, 1, 1, 12, TRUE
, 0, complain_overflow_bitfield
,
174 bfd_elf_generic_reloc
, "R_390_PC12DBL", FALSE
, 0,0x00000fff, TRUE
),
175 HOWTO(R_390_PLT12DBL
, 1, 1, 12, TRUE
, 0, complain_overflow_bitfield
,
176 bfd_elf_generic_reloc
, "R_390_PLT12DBL", FALSE
, 0,0x00000fff, TRUE
),
177 HOWTO(R_390_PC24DBL
, 1, 2, 24, TRUE
, 0, complain_overflow_bitfield
,
178 bfd_elf_generic_reloc
, "R_390_PC24DBL", FALSE
, 0,0x00ffffff, TRUE
),
179 HOWTO(R_390_PLT24DBL
, 1, 2, 24, TRUE
, 0, complain_overflow_bitfield
,
180 bfd_elf_generic_reloc
, "R_390_PLT24DBL", FALSE
, 0,0x00ffffff, TRUE
),
183 /* GNU extension to record C++ vtable hierarchy. */
184 static reloc_howto_type elf64_s390_vtinherit_howto
=
185 HOWTO (R_390_GNU_VTINHERIT
, 0,4,0,FALSE
,0,complain_overflow_dont
, NULL
, "R_390_GNU_VTINHERIT", FALSE
,0, 0, FALSE
);
186 static reloc_howto_type elf64_s390_vtentry_howto
=
187 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
);
189 static reloc_howto_type
*
190 elf_s390_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
191 bfd_reloc_code_real_type code
)
196 return &elf_howto_table
[(int) R_390_NONE
];
198 return &elf_howto_table
[(int) R_390_8
];
199 case BFD_RELOC_390_12
:
200 return &elf_howto_table
[(int) R_390_12
];
202 return &elf_howto_table
[(int) R_390_16
];
204 return &elf_howto_table
[(int) R_390_32
];
206 return &elf_howto_table
[(int) R_390_32
];
207 case BFD_RELOC_32_PCREL
:
208 return &elf_howto_table
[(int) R_390_PC32
];
209 case BFD_RELOC_390_GOT12
:
210 return &elf_howto_table
[(int) R_390_GOT12
];
211 case BFD_RELOC_32_GOT_PCREL
:
212 return &elf_howto_table
[(int) R_390_GOT32
];
213 case BFD_RELOC_390_PLT32
:
214 return &elf_howto_table
[(int) R_390_PLT32
];
215 case BFD_RELOC_390_COPY
:
216 return &elf_howto_table
[(int) R_390_COPY
];
217 case BFD_RELOC_390_GLOB_DAT
:
218 return &elf_howto_table
[(int) R_390_GLOB_DAT
];
219 case BFD_RELOC_390_JMP_SLOT
:
220 return &elf_howto_table
[(int) R_390_JMP_SLOT
];
221 case BFD_RELOC_390_RELATIVE
:
222 return &elf_howto_table
[(int) R_390_RELATIVE
];
223 case BFD_RELOC_32_GOTOFF
:
224 return &elf_howto_table
[(int) R_390_GOTOFF32
];
225 case BFD_RELOC_390_GOTPC
:
226 return &elf_howto_table
[(int) R_390_GOTPC
];
227 case BFD_RELOC_390_GOT16
:
228 return &elf_howto_table
[(int) R_390_GOT16
];
229 case BFD_RELOC_16_PCREL
:
230 return &elf_howto_table
[(int) R_390_PC16
];
231 case BFD_RELOC_390_PC12DBL
:
232 return &elf_howto_table
[(int) R_390_PC12DBL
];
233 case BFD_RELOC_390_PLT12DBL
:
234 return &elf_howto_table
[(int) R_390_PLT12DBL
];
235 case BFD_RELOC_390_PC16DBL
:
236 return &elf_howto_table
[(int) R_390_PC16DBL
];
237 case BFD_RELOC_390_PLT16DBL
:
238 return &elf_howto_table
[(int) R_390_PLT16DBL
];
239 case BFD_RELOC_390_PC24DBL
:
240 return &elf_howto_table
[(int) R_390_PC24DBL
];
241 case BFD_RELOC_390_PLT24DBL
:
242 return &elf_howto_table
[(int) R_390_PLT24DBL
];
243 case BFD_RELOC_390_PC32DBL
:
244 return &elf_howto_table
[(int) R_390_PC32DBL
];
245 case BFD_RELOC_390_PLT32DBL
:
246 return &elf_howto_table
[(int) R_390_PLT32DBL
];
247 case BFD_RELOC_390_GOTPCDBL
:
248 return &elf_howto_table
[(int) R_390_GOTPCDBL
];
250 return &elf_howto_table
[(int) R_390_64
];
251 case BFD_RELOC_64_PCREL
:
252 return &elf_howto_table
[(int) R_390_PC64
];
253 case BFD_RELOC_390_GOT64
:
254 return &elf_howto_table
[(int) R_390_GOT64
];
255 case BFD_RELOC_390_PLT64
:
256 return &elf_howto_table
[(int) R_390_PLT64
];
257 case BFD_RELOC_390_GOTENT
:
258 return &elf_howto_table
[(int) R_390_GOTENT
];
259 case BFD_RELOC_16_GOTOFF
:
260 return &elf_howto_table
[(int) R_390_GOTOFF16
];
261 case BFD_RELOC_390_GOTOFF64
:
262 return &elf_howto_table
[(int) R_390_GOTOFF64
];
263 case BFD_RELOC_390_GOTPLT12
:
264 return &elf_howto_table
[(int) R_390_GOTPLT12
];
265 case BFD_RELOC_390_GOTPLT16
:
266 return &elf_howto_table
[(int) R_390_GOTPLT16
];
267 case BFD_RELOC_390_GOTPLT32
:
268 return &elf_howto_table
[(int) R_390_GOTPLT32
];
269 case BFD_RELOC_390_GOTPLT64
:
270 return &elf_howto_table
[(int) R_390_GOTPLT64
];
271 case BFD_RELOC_390_GOTPLTENT
:
272 return &elf_howto_table
[(int) R_390_GOTPLTENT
];
273 case BFD_RELOC_390_PLTOFF16
:
274 return &elf_howto_table
[(int) R_390_PLTOFF16
];
275 case BFD_RELOC_390_PLTOFF32
:
276 return &elf_howto_table
[(int) R_390_PLTOFF32
];
277 case BFD_RELOC_390_PLTOFF64
:
278 return &elf_howto_table
[(int) R_390_PLTOFF64
];
279 case BFD_RELOC_390_TLS_LOAD
:
280 return &elf_howto_table
[(int) R_390_TLS_LOAD
];
281 case BFD_RELOC_390_TLS_GDCALL
:
282 return &elf_howto_table
[(int) R_390_TLS_GDCALL
];
283 case BFD_RELOC_390_TLS_LDCALL
:
284 return &elf_howto_table
[(int) R_390_TLS_LDCALL
];
285 case BFD_RELOC_390_TLS_GD64
:
286 return &elf_howto_table
[(int) R_390_TLS_GD64
];
287 case BFD_RELOC_390_TLS_GOTIE12
:
288 return &elf_howto_table
[(int) R_390_TLS_GOTIE12
];
289 case BFD_RELOC_390_TLS_GOTIE64
:
290 return &elf_howto_table
[(int) R_390_TLS_GOTIE64
];
291 case BFD_RELOC_390_TLS_LDM64
:
292 return &elf_howto_table
[(int) R_390_TLS_LDM64
];
293 case BFD_RELOC_390_TLS_IE64
:
294 return &elf_howto_table
[(int) R_390_TLS_IE64
];
295 case BFD_RELOC_390_TLS_IEENT
:
296 return &elf_howto_table
[(int) R_390_TLS_IEENT
];
297 case BFD_RELOC_390_TLS_LE64
:
298 return &elf_howto_table
[(int) R_390_TLS_LE64
];
299 case BFD_RELOC_390_TLS_LDO64
:
300 return &elf_howto_table
[(int) R_390_TLS_LDO64
];
301 case BFD_RELOC_390_TLS_DTPMOD
:
302 return &elf_howto_table
[(int) R_390_TLS_DTPMOD
];
303 case BFD_RELOC_390_TLS_DTPOFF
:
304 return &elf_howto_table
[(int) R_390_TLS_DTPOFF
];
305 case BFD_RELOC_390_TLS_TPOFF
:
306 return &elf_howto_table
[(int) R_390_TLS_TPOFF
];
307 case BFD_RELOC_390_20
:
308 return &elf_howto_table
[(int) R_390_20
];
309 case BFD_RELOC_390_GOT20
:
310 return &elf_howto_table
[(int) R_390_GOT20
];
311 case BFD_RELOC_390_GOTPLT20
:
312 return &elf_howto_table
[(int) R_390_GOTPLT20
];
313 case BFD_RELOC_390_TLS_GOTIE20
:
314 return &elf_howto_table
[(int) R_390_TLS_GOTIE20
];
315 case BFD_RELOC_390_IRELATIVE
:
316 return &elf_howto_table
[(int) R_390_IRELATIVE
];
317 case BFD_RELOC_VTABLE_INHERIT
:
318 return &elf64_s390_vtinherit_howto
;
319 case BFD_RELOC_VTABLE_ENTRY
:
320 return &elf64_s390_vtentry_howto
;
327 static reloc_howto_type
*
328 elf_s390_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
334 i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]);
336 if (elf_howto_table
[i
].name
!= NULL
337 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
338 return &elf_howto_table
[i
];
340 if (strcasecmp (elf64_s390_vtinherit_howto
.name
, r_name
) == 0)
341 return &elf64_s390_vtinherit_howto
;
342 if (strcasecmp (elf64_s390_vtentry_howto
.name
, r_name
) == 0)
343 return &elf64_s390_vtentry_howto
;
348 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
349 and elf64-s390.c has its own copy. */
352 elf_s390_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
354 Elf_Internal_Rela
*dst
)
356 unsigned int r_type
= ELF64_R_TYPE(dst
->r_info
);
359 case R_390_GNU_VTINHERIT
:
360 cache_ptr
->howto
= &elf64_s390_vtinherit_howto
;
363 case R_390_GNU_VTENTRY
:
364 cache_ptr
->howto
= &elf64_s390_vtentry_howto
;
368 if (r_type
>= sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]))
370 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
374 cache_ptr
->howto
= &elf_howto_table
[r_type
];
378 /* A relocation function which doesn't do anything. */
379 static bfd_reloc_status_type
380 s390_tls_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
381 arelent
*reloc_entry
,
382 asymbol
*symbol ATTRIBUTE_UNUSED
,
383 void * data ATTRIBUTE_UNUSED
,
384 asection
*input_section
,
386 char **error_message ATTRIBUTE_UNUSED
)
389 reloc_entry
->address
+= input_section
->output_offset
;
393 /* Handle the large displacement relocs. */
394 static bfd_reloc_status_type
395 s390_elf_ldisp_reloc (bfd
*abfd
,
396 arelent
*reloc_entry
,
399 asection
*input_section
,
401 char **error_message ATTRIBUTE_UNUSED
)
403 reloc_howto_type
*howto
= reloc_entry
->howto
;
407 if (output_bfd
!= (bfd
*) NULL
408 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
409 && (! howto
->partial_inplace
410 || reloc_entry
->addend
== 0))
412 reloc_entry
->address
+= input_section
->output_offset
;
415 if (output_bfd
!= NULL
)
416 return bfd_reloc_continue
;
418 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
419 return bfd_reloc_outofrange
;
421 relocation
= (symbol
->value
422 + symbol
->section
->output_section
->vma
423 + symbol
->section
->output_offset
);
424 relocation
+= reloc_entry
->addend
;
425 if (howto
->pc_relative
)
427 relocation
-= (input_section
->output_section
->vma
428 + input_section
->output_offset
);
429 relocation
-= reloc_entry
->address
;
432 insn
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ reloc_entry
->address
);
433 insn
|= (relocation
& 0xfff) << 16 | (relocation
& 0xff000) >> 4;
434 bfd_put_32 (abfd
, insn
, (bfd_byte
*) data
+ reloc_entry
->address
);
436 if ((bfd_signed_vma
) relocation
< - 0x80000
437 || (bfd_signed_vma
) relocation
> 0x7ffff)
438 return bfd_reloc_overflow
;
444 elf_s390_is_local_label_name (bfd
*abfd
, const char *name
)
446 if (name
[0] == '.' && (name
[1] == 'X' || name
[1] == 'L'))
449 return _bfd_elf_is_local_label_name (abfd
, name
);
452 /* Functions for the 390 ELF linker. */
454 /* The name of the dynamic interpreter. This is put in the .interp
457 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
459 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
460 copying dynamic variables from a shared lib into an app's dynbss
461 section, and instead use a dynamic relocation to point into the
463 #define ELIMINATE_COPY_RELOCS 1
465 /* The size in bytes of the first entry in the procedure linkage table. */
466 #define PLT_FIRST_ENTRY_SIZE 32
467 /* The size in bytes of an entry in the procedure linkage table. */
468 #define PLT_ENTRY_SIZE 32
470 #define GOT_ENTRY_SIZE 8
472 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
474 /* The first three entries in a procedure linkage table are reserved,
475 and the initial contents are unimportant (we zero them out).
476 Subsequent entries look like this. See the SVR4 ABI 386
477 supplement to see how this works. */
479 /* For the s390, simple addr offset can only be 0 - 4096.
480 To use the full 16777216 TB address space, several instructions
481 are needed to load an address in a register and execute
482 a branch( or just saving the address)
484 Furthermore, only r 0 and 1 are free to use!!! */
486 /* The first 3 words in the GOT are then reserved.
487 Word 0 is the address of the dynamic table.
488 Word 1 is a pointer to a structure describing the object
489 Word 2 is used to point to the loader entry address.
491 The code for PLT entries looks like this:
493 The GOT holds the address in the PLT to be executed.
494 The loader then gets:
495 24(15) = Pointer to the structure describing the object.
496 28(15) = Offset in symbol table
497 The loader must then find the module where the function is
498 and insert the address in the GOT.
500 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
501 LG 1,0(1) # 6 bytes Load address from GOT in r1
502 BCR 15,1 # 2 bytes Jump to address
503 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
504 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
505 BRCL 15,-x # 6 bytes Jump to start of PLT
506 .long ? # 4 bytes offset into .rela.plt
508 Total = 32 bytes per PLT entry
509 Fixup at offset 2: relative address to GOT entry
510 Fixup at offset 22: relative branch to PLT0
511 Fixup at offset 28: 32 bit offset into .rela.plt
513 A 32 bit offset into the symbol table is enough. It allows for
514 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
515 object (the main program, any shared library) is limited to 4GB in
516 size. Having a .rela.plt of 2GB would already make the .plt
517 section bigger than 8GB. */
519 static const bfd_byte elf_s390x_plt_entry
[PLT_ENTRY_SIZE
] =
521 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
522 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
523 0x07, 0xf1, /* br %r1 */
524 0x0d, 0x10, /* basr %r1,%r0 */
525 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
526 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
527 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
530 /* The first PLT entry pushes the offset into the symbol table
531 from R1 onto the stack at 56(15) and the loader object info
532 at 48(15), loads the loader address in R1 and jumps to it. */
534 /* The first entry in the PLT:
537 STG 1,56(15) # r1 contains the offset into the symbol table
538 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
539 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
540 LG 1,16(1) # get entry address of loader
541 BCR 15,1 # jump to loader
543 Fixup at offset 8: relative address to start of GOT. */
545 static const bfd_byte elf_s390x_first_plt_entry
[PLT_FIRST_ENTRY_SIZE
] =
547 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
548 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
549 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
550 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
551 0x07, 0xf1, /* br %r1 */
552 0x07, 0x00, /* nopr %r0 */
553 0x07, 0x00, /* nopr %r0 */
554 0x07, 0x00 /* nopr %r0 */
558 /* s390 ELF linker hash entry. */
560 struct elf_s390_link_hash_entry
562 struct elf_link_hash_entry elf
;
564 /* Track dynamic relocs copied for this symbol. */
565 struct elf_dyn_relocs
*dyn_relocs
;
567 /* Number of GOTPLT references for a function. */
568 bfd_signed_vma gotplt_refcount
;
570 #define GOT_UNKNOWN 0
574 #define GOT_TLS_IE_NLT 3
575 unsigned char tls_type
;
577 /* For pointer equality reasons we might need to change the symbol
578 type from STT_GNU_IFUNC to STT_FUNC together with its value and
579 section entry. So after alloc_dynrelocs only these values should
580 be used. In order to check whether a symbol is IFUNC use
581 s390_is_ifunc_symbol_p. */
582 bfd_vma ifunc_resolver_address
;
583 asection
*ifunc_resolver_section
;
586 #define elf_s390_hash_entry(ent) \
587 ((struct elf_s390_link_hash_entry *)(ent))
589 /* This structure represents an entry in the local PLT list needed for
590 local IFUNC symbols. */
593 /* The section of the local symbol.
594 Set in relocate_section and used in finish_dynamic_sections. */
599 bfd_signed_vma refcount
;
604 /* NOTE: Keep this structure in sync with
605 the one declared in elf32-s390.c. */
606 struct elf_s390_obj_tdata
608 struct elf_obj_tdata root
;
610 /* A local PLT is needed for ifunc symbols. */
611 struct plt_entry
*local_plt
;
613 /* TLS type for each local got entry. */
614 char *local_got_tls_type
;
617 #define elf_s390_tdata(abfd) \
618 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
620 #define elf_s390_local_plt(abfd) \
621 (elf_s390_tdata (abfd)->local_plt)
623 #define elf_s390_local_got_tls_type(abfd) \
624 (elf_s390_tdata (abfd)->local_got_tls_type)
626 #define is_s390_elf(bfd) \
627 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
628 && elf_tdata (bfd) != NULL \
629 && elf_object_id (bfd) == S390_ELF_DATA)
632 elf_s390_mkobject (bfd
*abfd
)
634 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_s390_obj_tdata
),
639 elf_s390_object_p (bfd
*abfd
)
641 /* Set the right machine number for an s390 elf32 file. */
642 return bfd_default_set_arch_mach (abfd
, bfd_arch_s390
, bfd_mach_s390_64
);
645 /* s390 ELF linker hash table. */
647 struct elf_s390_link_hash_table
649 struct elf_link_hash_table elf
;
651 /* Short-cuts to get to dynamic linker sections. */
657 bfd_signed_vma refcount
;
661 /* Small local sym cache. */
662 struct sym_cache sym_cache
;
665 /* Get the s390 ELF linker hash table from a link_info structure. */
667 #define elf_s390_hash_table(p) \
668 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
669 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
672 #include "elf-s390-common.c"
674 /* Create an entry in an s390 ELF linker hash table. */
676 static struct bfd_hash_entry
*
677 link_hash_newfunc (struct bfd_hash_entry
*entry
,
678 struct bfd_hash_table
*table
,
681 /* Allocate the structure if it has not already been allocated by a
685 entry
= bfd_hash_allocate (table
,
686 sizeof (struct elf_s390_link_hash_entry
));
691 /* Call the allocation method of the superclass. */
692 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
695 struct elf_s390_link_hash_entry
*eh
;
697 eh
= (struct elf_s390_link_hash_entry
*) entry
;
698 eh
->dyn_relocs
= NULL
;
699 eh
->gotplt_refcount
= 0;
700 eh
->tls_type
= GOT_UNKNOWN
;
701 eh
->ifunc_resolver_address
= 0;
702 eh
->ifunc_resolver_section
= NULL
;
708 /* Create an s390 ELF linker hash table. */
710 static struct bfd_link_hash_table
*
711 elf_s390_link_hash_table_create (bfd
*abfd
)
713 struct elf_s390_link_hash_table
*ret
;
714 bfd_size_type amt
= sizeof (struct elf_s390_link_hash_table
);
716 ret
= (struct elf_s390_link_hash_table
*) bfd_zmalloc (amt
);
720 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
721 sizeof (struct elf_s390_link_hash_entry
),
728 return &ret
->elf
.root
;
731 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
732 shortcuts to them in our hash table. */
735 create_got_section (bfd
*dynobj
,
736 struct bfd_link_info
*info
)
738 struct elf_s390_link_hash_table
*htab
;
740 if (! _bfd_elf_create_got_section (dynobj
, info
))
743 htab
= elf_s390_hash_table (info
);
747 htab
->elf
.sgot
= bfd_get_linker_section (dynobj
, ".got");
748 htab
->elf
.sgotplt
= bfd_get_linker_section (dynobj
, ".got.plt");
749 htab
->elf
.srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
750 if (!htab
->elf
.sgot
|| !htab
->elf
.sgotplt
|| !htab
->elf
.srelgot
)
755 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
756 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
760 elf_s390_create_dynamic_sections (bfd
*dynobj
,
761 struct bfd_link_info
*info
)
763 struct elf_s390_link_hash_table
*htab
;
765 htab
= elf_s390_hash_table (info
);
769 if (!htab
->elf
.sgot
&& !create_got_section (dynobj
, info
))
772 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
775 htab
->elf
.splt
= bfd_get_linker_section (dynobj
, ".plt");
776 htab
->elf
.srelplt
= bfd_get_linker_section (dynobj
, ".rela.plt");
777 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
778 if (!bfd_link_pic (info
))
779 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
781 if (!htab
->elf
.splt
|| !htab
->elf
.srelplt
|| !htab
->sdynbss
782 || (!bfd_link_pic (info
) && !htab
->srelbss
))
788 /* Copy the extra info we tack onto an elf_link_hash_entry. */
791 elf_s390_copy_indirect_symbol (struct bfd_link_info
*info
,
792 struct elf_link_hash_entry
*dir
,
793 struct elf_link_hash_entry
*ind
)
795 struct elf_s390_link_hash_entry
*edir
, *eind
;
797 edir
= (struct elf_s390_link_hash_entry
*) dir
;
798 eind
= (struct elf_s390_link_hash_entry
*) ind
;
800 if (eind
->dyn_relocs
!= NULL
)
802 if (edir
->dyn_relocs
!= NULL
)
804 struct elf_dyn_relocs
**pp
;
805 struct elf_dyn_relocs
*p
;
807 /* Add reloc counts against the indirect sym to the direct sym
808 list. Merge any entries against the same section. */
809 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
811 struct elf_dyn_relocs
*q
;
813 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
814 if (q
->sec
== p
->sec
)
816 q
->pc_count
+= p
->pc_count
;
817 q
->count
+= p
->count
;
824 *pp
= edir
->dyn_relocs
;
827 edir
->dyn_relocs
= eind
->dyn_relocs
;
828 eind
->dyn_relocs
= NULL
;
831 if (ind
->root
.type
== bfd_link_hash_indirect
832 && dir
->got
.refcount
<= 0)
834 edir
->tls_type
= eind
->tls_type
;
835 eind
->tls_type
= GOT_UNKNOWN
;
838 if (ELIMINATE_COPY_RELOCS
839 && ind
->root
.type
!= bfd_link_hash_indirect
840 && dir
->dynamic_adjusted
)
842 /* If called to transfer flags for a weakdef during processing
843 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
844 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
845 dir
->ref_dynamic
|= ind
->ref_dynamic
;
846 dir
->ref_regular
|= ind
->ref_regular
;
847 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
848 dir
->needs_plt
|= ind
->needs_plt
;
851 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
855 elf_s390_tls_transition (struct bfd_link_info
*info
,
859 if (bfd_link_pic (info
))
867 return R_390_TLS_LE64
;
868 return R_390_TLS_IE64
;
869 case R_390_TLS_GOTIE64
:
871 return R_390_TLS_LE64
;
872 return R_390_TLS_GOTIE64
;
873 case R_390_TLS_LDM64
:
874 return R_390_TLS_LE64
;
880 /* Look through the relocs for a section during the first phase, and
881 allocate space in the global offset table or procedure linkage
885 elf_s390_check_relocs (bfd
*abfd
,
886 struct bfd_link_info
*info
,
888 const Elf_Internal_Rela
*relocs
)
890 struct elf_s390_link_hash_table
*htab
;
891 Elf_Internal_Shdr
*symtab_hdr
;
892 struct elf_link_hash_entry
**sym_hashes
;
893 const Elf_Internal_Rela
*rel
;
894 const Elf_Internal_Rela
*rel_end
;
896 bfd_signed_vma
*local_got_refcounts
;
897 int tls_type
, old_tls_type
;
899 if (bfd_link_relocatable (info
))
902 BFD_ASSERT (is_s390_elf (abfd
));
904 htab
= elf_s390_hash_table (info
);
908 symtab_hdr
= &elf_symtab_hdr (abfd
);
909 sym_hashes
= elf_sym_hashes (abfd
);
910 local_got_refcounts
= elf_local_got_refcounts (abfd
);
914 rel_end
= relocs
+ sec
->reloc_count
;
915 for (rel
= relocs
; rel
< rel_end
; rel
++)
918 unsigned long r_symndx
;
919 struct elf_link_hash_entry
*h
;
920 Elf_Internal_Sym
*isym
;
922 r_symndx
= ELF64_R_SYM (rel
->r_info
);
924 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
926 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
932 if (r_symndx
< symtab_hdr
->sh_info
)
934 /* A local symbol. */
935 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
940 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
942 struct plt_entry
*plt
;
944 if (htab
->elf
.dynobj
== NULL
)
945 htab
->elf
.dynobj
= abfd
;
947 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
950 if (local_got_refcounts
== NULL
)
952 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
954 local_got_refcounts
= elf_local_got_refcounts (abfd
);
956 plt
= elf_s390_local_plt (abfd
);
957 plt
[r_symndx
].plt
.refcount
++;
963 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
964 while (h
->root
.type
== bfd_link_hash_indirect
965 || h
->root
.type
== bfd_link_hash_warning
)
966 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
968 /* PR15323, ref flags aren't set for references in the same
970 h
->root
.non_ir_ref
= 1;
973 /* Create got section and local_got_refcounts array if they
975 r_type
= elf_s390_tls_transition (info
,
976 ELF64_R_TYPE (rel
->r_info
),
991 case R_390_GOTPLTENT
:
993 case R_390_TLS_GOTIE12
:
994 case R_390_TLS_GOTIE20
:
995 case R_390_TLS_GOTIE64
:
996 case R_390_TLS_IEENT
:
998 case R_390_TLS_LDM64
:
1000 && local_got_refcounts
== NULL
)
1002 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
1004 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1008 case R_390_GOTOFF16
:
1009 case R_390_GOTOFF32
:
1010 case R_390_GOTOFF64
:
1012 case R_390_GOTPCDBL
:
1013 if (htab
->elf
.sgot
== NULL
)
1015 if (htab
->elf
.dynobj
== NULL
)
1016 htab
->elf
.dynobj
= abfd
;
1017 if (!create_got_section (htab
->elf
.dynobj
, info
))
1024 if (htab
->elf
.dynobj
== NULL
)
1025 htab
->elf
.dynobj
= abfd
;
1026 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1029 /* Make sure an IFUNC symbol defined in a non-shared object
1030 always gets a PLT slot. */
1031 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
1033 /* The symbol is called by the dynamic loader in order
1034 to resolve the relocation. So it is in fact also
1043 case R_390_GOTOFF16
:
1044 case R_390_GOTOFF32
:
1045 case R_390_GOTOFF64
:
1047 case R_390_GOTPCDBL
:
1048 /* These relocs do not need a GOT slot. They just load the
1049 GOT pointer itself or address something else relative to
1050 the GOT. Since the GOT pointer has been set up above we
1054 case R_390_PLT12DBL
:
1055 case R_390_PLT16DBL
:
1056 case R_390_PLT24DBL
:
1058 case R_390_PLT32DBL
:
1060 case R_390_PLTOFF16
:
1061 case R_390_PLTOFF32
:
1062 case R_390_PLTOFF64
:
1063 /* This symbol requires a procedure linkage table entry. We
1064 actually build the entry in adjust_dynamic_symbol,
1065 because this might be a case of linking PIC code which is
1066 never referenced by a dynamic object, in which case we
1067 don't need to generate a procedure linkage table entry
1070 /* If this is a local symbol, we resolve it directly without
1071 creating a procedure linkage table entry. */
1075 h
->plt
.refcount
+= 1;
1079 case R_390_GOTPLT12
:
1080 case R_390_GOTPLT16
:
1081 case R_390_GOTPLT20
:
1082 case R_390_GOTPLT32
:
1083 case R_390_GOTPLT64
:
1084 case R_390_GOTPLTENT
:
1085 /* This symbol requires either a procedure linkage table entry
1086 or an entry in the local got. We actually build the entry
1087 in adjust_dynamic_symbol because whether this is really a
1088 global reference can change and with it the fact if we have
1089 to create a plt entry or a local got entry. To be able to
1090 make a once global symbol a local one we have to keep track
1091 of the number of gotplt references that exist for this
1095 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
++;
1097 h
->plt
.refcount
+= 1;
1100 local_got_refcounts
[r_symndx
] += 1;
1103 case R_390_TLS_LDM64
:
1104 htab
->tls_ldm_got
.refcount
+= 1;
1107 case R_390_TLS_IE64
:
1108 case R_390_TLS_GOTIE12
:
1109 case R_390_TLS_GOTIE20
:
1110 case R_390_TLS_GOTIE64
:
1111 case R_390_TLS_IEENT
:
1112 if (bfd_link_pic (info
))
1113 info
->flags
|= DF_STATIC_TLS
;
1122 case R_390_TLS_GD64
:
1123 /* This symbol requires a global offset table entry. */
1132 tls_type
= GOT_NORMAL
;
1134 case R_390_TLS_GD64
:
1135 tls_type
= GOT_TLS_GD
;
1137 case R_390_TLS_IE64
:
1138 case R_390_TLS_GOTIE64
:
1139 tls_type
= GOT_TLS_IE
;
1141 case R_390_TLS_GOTIE12
:
1142 case R_390_TLS_GOTIE20
:
1143 case R_390_TLS_IEENT
:
1144 tls_type
= GOT_TLS_IE_NLT
;
1150 h
->got
.refcount
+= 1;
1151 old_tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1155 local_got_refcounts
[r_symndx
] += 1;
1156 old_tls_type
= elf_s390_local_got_tls_type (abfd
) [r_symndx
];
1158 /* If a TLS symbol is accessed using IE at least once,
1159 there is no point to use dynamic model for it. */
1160 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
)
1162 if (old_tls_type
== GOT_NORMAL
|| tls_type
== GOT_NORMAL
)
1164 (*_bfd_error_handler
)
1165 (_("%B: `%s' accessed both as normal and thread local symbol"),
1166 abfd
, h
->root
.root
.string
);
1169 if (old_tls_type
> tls_type
)
1170 tls_type
= old_tls_type
;
1173 if (old_tls_type
!= tls_type
)
1176 elf_s390_hash_entry (h
)->tls_type
= tls_type
;
1178 elf_s390_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1181 if (r_type
!= R_390_TLS_IE64
)
1185 case R_390_TLS_LE64
:
1186 /* For static linking and executables this reloc will be
1187 calculated at linktime otherwise a TLS_TPOFF runtime
1188 reloc will be generated. */
1189 if (r_type
== R_390_TLS_LE64
&& bfd_link_pie (info
))
1192 if (!bfd_link_pic (info
))
1194 info
->flags
|= DF_STATIC_TLS
;
1208 if (h
!= NULL
&& bfd_link_executable (info
))
1210 /* If this reloc is in a read-only section, we might
1211 need a copy reloc. We can't check reliably at this
1212 stage whether the section is read-only, as input
1213 sections have not yet been mapped to output sections.
1214 Tentatively set the flag for now, and correct in
1215 adjust_dynamic_symbol. */
1218 if (!bfd_link_pic (info
))
1220 /* We may need a .plt entry if the function this reloc
1221 refers to is in a shared lib. */
1222 h
->plt
.refcount
+= 1;
1226 /* If we are creating a shared library, and this is a reloc
1227 against a global symbol, or a non PC relative reloc
1228 against a local symbol, then we need to copy the reloc
1229 into the shared library. However, if we are linking with
1230 -Bsymbolic, we do not need to copy a reloc against a
1231 global symbol which is defined in an object we are
1232 including in the link (i.e., DEF_REGULAR is set). At
1233 this point we have not seen all the input files, so it is
1234 possible that DEF_REGULAR is not set now but will be set
1235 later (it is never cleared). In case of a weak definition,
1236 DEF_REGULAR may be cleared later by a strong definition in
1237 a shared library. We account for that possibility below by
1238 storing information in the relocs_copied field of the hash
1239 table entry. A similar situation occurs when creating
1240 shared libraries and symbol visibility changes render the
1243 If on the other hand, we are creating an executable, we
1244 may need to keep relocations for symbols satisfied by a
1245 dynamic library if we manage to avoid copy relocs for the
1247 if ((bfd_link_pic (info
)
1248 && (sec
->flags
& SEC_ALLOC
) != 0
1249 && ((ELF64_R_TYPE (rel
->r_info
) != R_390_PC16
1250 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC12DBL
1251 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC16DBL
1252 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC24DBL
1253 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32
1254 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32DBL
1255 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC64
)
1257 && (! SYMBOLIC_BIND (info
, h
)
1258 || h
->root
.type
== bfd_link_hash_defweak
1259 || !h
->def_regular
))))
1260 || (ELIMINATE_COPY_RELOCS
1261 && !bfd_link_pic (info
)
1262 && (sec
->flags
& SEC_ALLOC
) != 0
1264 && (h
->root
.type
== bfd_link_hash_defweak
1265 || !h
->def_regular
)))
1267 struct elf_dyn_relocs
*p
;
1268 struct elf_dyn_relocs
**head
;
1270 /* We must copy these reloc types into the output file.
1271 Create a reloc section in dynobj and make room for
1275 if (htab
->elf
.dynobj
== NULL
)
1276 htab
->elf
.dynobj
= abfd
;
1278 sreloc
= _bfd_elf_make_dynamic_reloc_section
1279 (sec
, htab
->elf
.dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1285 /* If this is a global symbol, we count the number of
1286 relocations we need for this symbol. */
1289 head
= &((struct elf_s390_link_hash_entry
*) h
)->dyn_relocs
;
1293 /* Track dynamic relocs needed for local syms too.
1294 We really need local syms available to do this
1299 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1304 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1308 vpp
= &elf_section_data (s
)->local_dynrel
;
1309 head
= (struct elf_dyn_relocs
**) vpp
;
1313 if (p
== NULL
|| p
->sec
!= sec
)
1315 bfd_size_type amt
= sizeof *p
;
1316 p
= ((struct elf_dyn_relocs
*)
1317 bfd_alloc (htab
->elf
.dynobj
, amt
));
1328 if (ELF64_R_TYPE (rel
->r_info
) == R_390_PC16
1329 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC12DBL
1330 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1331 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1332 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32
1333 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32DBL
1334 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC64
)
1339 /* This relocation describes the C++ object vtable hierarchy.
1340 Reconstruct it for later use during GC. */
1341 case R_390_GNU_VTINHERIT
:
1342 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1346 /* This relocation describes which C++ vtable entries are actually
1347 used. Record for later use during GC. */
1348 case R_390_GNU_VTENTRY
:
1349 BFD_ASSERT (h
!= NULL
);
1351 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1363 /* Return the section that should be marked against GC for a given
1367 elf_s390_gc_mark_hook (asection
*sec
,
1368 struct bfd_link_info
*info
,
1369 Elf_Internal_Rela
*rel
,
1370 struct elf_link_hash_entry
*h
,
1371 Elf_Internal_Sym
*sym
)
1374 switch (ELF64_R_TYPE (rel
->r_info
))
1376 case R_390_GNU_VTINHERIT
:
1377 case R_390_GNU_VTENTRY
:
1381 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1384 /* Update the got entry reference counts for the section being removed. */
1387 elf_s390_gc_sweep_hook (bfd
*abfd
,
1388 struct bfd_link_info
*info
,
1390 const Elf_Internal_Rela
*relocs
)
1392 struct elf_s390_link_hash_table
*htab
;
1393 Elf_Internal_Shdr
*symtab_hdr
;
1394 struct elf_link_hash_entry
**sym_hashes
;
1395 bfd_signed_vma
*local_got_refcounts
;
1396 const Elf_Internal_Rela
*rel
, *relend
;
1398 if (bfd_link_relocatable (info
))
1401 htab
= elf_s390_hash_table (info
);
1405 elf_section_data (sec
)->local_dynrel
= NULL
;
1407 symtab_hdr
= &elf_symtab_hdr (abfd
);
1408 sym_hashes
= elf_sym_hashes (abfd
);
1409 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1411 relend
= relocs
+ sec
->reloc_count
;
1412 for (rel
= relocs
; rel
< relend
; rel
++)
1414 unsigned long r_symndx
;
1415 unsigned int r_type
;
1416 struct elf_link_hash_entry
*h
= NULL
;
1418 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1419 if (r_symndx
>= symtab_hdr
->sh_info
)
1421 struct elf_s390_link_hash_entry
*eh
;
1422 struct elf_dyn_relocs
**pp
;
1423 struct elf_dyn_relocs
*p
;
1425 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1426 while (h
->root
.type
== bfd_link_hash_indirect
1427 || h
->root
.type
== bfd_link_hash_warning
)
1428 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1429 eh
= (struct elf_s390_link_hash_entry
*) h
;
1431 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1434 /* Everything must go for SEC. */
1441 Elf_Internal_Sym
*isym
;
1443 /* A local symbol. */
1444 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1449 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1451 struct plt_entry
*plt
= elf_s390_local_plt (abfd
);
1452 if (plt
[r_symndx
].plt
.refcount
> 0)
1453 plt
[r_symndx
].plt
.refcount
--;
1457 r_type
= ELF64_R_TYPE (rel
->r_info
);
1458 r_type
= elf_s390_tls_transition (info
, r_type
, h
!= NULL
);
1461 case R_390_TLS_LDM64
:
1462 if (htab
->tls_ldm_got
.refcount
> 0)
1463 htab
->tls_ldm_got
.refcount
-= 1;
1465 case R_390_GOTOFF16
:
1466 case R_390_GOTOFF32
:
1467 case R_390_GOTOFF64
:
1469 case R_390_GOTPCDBL
:
1472 case R_390_TLS_GD64
:
1473 case R_390_TLS_IE64
:
1474 case R_390_TLS_GOTIE12
:
1475 case R_390_TLS_GOTIE20
:
1476 case R_390_TLS_GOTIE64
:
1477 case R_390_TLS_IEENT
:
1486 if (h
->got
.refcount
> 0)
1487 h
->got
.refcount
-= 1;
1489 else if (local_got_refcounts
!= NULL
)
1491 if (local_got_refcounts
[r_symndx
] > 0)
1492 local_got_refcounts
[r_symndx
] -= 1;
1509 if (bfd_link_pic (info
))
1513 case R_390_PLT12DBL
:
1514 case R_390_PLT16DBL
:
1515 case R_390_PLT24DBL
:
1517 case R_390_PLT32DBL
:
1519 case R_390_PLTOFF16
:
1520 case R_390_PLTOFF32
:
1521 case R_390_PLTOFF64
:
1524 if (h
->plt
.refcount
> 0)
1525 h
->plt
.refcount
-= 1;
1529 case R_390_GOTPLT12
:
1530 case R_390_GOTPLT16
:
1531 case R_390_GOTPLT20
:
1532 case R_390_GOTPLT32
:
1533 case R_390_GOTPLT64
:
1534 case R_390_GOTPLTENT
:
1537 if (h
->plt
.refcount
> 0)
1539 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
--;
1540 h
->plt
.refcount
-= 1;
1543 else if (local_got_refcounts
!= NULL
)
1545 if (local_got_refcounts
[r_symndx
] > 0)
1546 local_got_refcounts
[r_symndx
] -= 1;
1558 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1559 entry but we found we will not create any. Called when we find we will
1560 not have any PLT for this symbol, by for example
1561 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1562 or elf_s390_size_dynamic_sections if no dynamic sections will be
1563 created (we're only linking static objects). */
1566 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry
*h
)
1568 if (h
->elf
.root
.type
== bfd_link_hash_warning
)
1569 h
= (struct elf_s390_link_hash_entry
*) h
->elf
.root
.u
.i
.link
;
1571 if (h
->gotplt_refcount
<= 0)
1574 /* We simply add the number of gotplt references to the number
1575 * of got references for this symbol. */
1576 h
->elf
.got
.refcount
+= h
->gotplt_refcount
;
1577 h
->gotplt_refcount
= -1;
1580 /* Adjust a symbol defined by a dynamic object and referenced by a
1581 regular object. The current definition is in some section of the
1582 dynamic object, but we're not including those sections. We have to
1583 change the definition to something the rest of the link can
1587 elf_s390_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1588 struct elf_link_hash_entry
*h
)
1590 struct elf_s390_link_hash_table
*htab
;
1593 /* STT_GNU_IFUNC symbol must go through PLT. */
1594 if (s390_is_ifunc_symbol_p (h
))
1596 /* All local STT_GNU_IFUNC references must be treated as local
1597 calls via local PLT. */
1598 if (h
->ref_regular
&& SYMBOL_CALLS_LOCAL (info
, h
))
1600 bfd_size_type pc_count
= 0, count
= 0;
1601 struct elf_dyn_relocs
**pp
;
1602 struct elf_s390_link_hash_entry
*eh
;
1603 struct elf_dyn_relocs
*p
;
1605 eh
= (struct elf_s390_link_hash_entry
*) h
;
1606 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1608 pc_count
+= p
->pc_count
;
1609 p
->count
-= p
->pc_count
;
1618 if (pc_count
|| count
)
1622 if (h
->plt
.refcount
<= 0)
1623 h
->plt
.refcount
= 1;
1625 h
->plt
.refcount
+= 1;
1629 if (h
->plt
.refcount
<= 0)
1631 h
->plt
.offset
= (bfd_vma
) -1;
1637 /* If this is a function, put it in the procedure linkage table. We
1638 will fill in the contents of the procedure linkage table later
1639 (although we could actually do it here). */
1640 if (h
->type
== STT_FUNC
1643 if (h
->plt
.refcount
<= 0
1644 || SYMBOL_CALLS_LOCAL (info
, h
)
1645 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1646 && h
->root
.type
== bfd_link_hash_undefweak
))
1648 /* This case can occur if we saw a PLT32 reloc in an input
1649 file, but the symbol was never referred to by a dynamic
1650 object, or if all references were garbage collected. In
1651 such a case, we don't actually need to build a procedure
1652 linkage table, and we can just do a PC32 reloc instead. */
1653 h
->plt
.offset
= (bfd_vma
) -1;
1655 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1661 /* It's possible that we incorrectly decided a .plt reloc was
1662 needed for an R_390_PC32 reloc to a non-function sym in
1663 check_relocs. We can't decide accurately between function and
1664 non-function syms in check-relocs; Objects loaded later in
1665 the link may change h->type. So fix it now. */
1666 h
->plt
.offset
= (bfd_vma
) -1;
1668 /* If this is a weak symbol, and there is a real definition, the
1669 processor independent code will have arranged for us to see the
1670 real definition first, and we can just use the same value. */
1671 if (h
->u
.weakdef
!= NULL
)
1673 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1674 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1675 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1676 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1677 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1678 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1682 /* This is a reference to a symbol defined by a dynamic object which
1683 is not a function. */
1685 /* If we are creating a shared library, we must presume that the
1686 only references to the symbol are via the global offset table.
1687 For such cases we need not do anything here; the relocations will
1688 be handled correctly by relocate_section. */
1689 if (bfd_link_pic (info
))
1692 /* If there are no references to this symbol that do not use the
1693 GOT, we don't need to generate a copy reloc. */
1694 if (!h
->non_got_ref
)
1697 /* If -z nocopyreloc was given, we won't generate them either. */
1698 if (info
->nocopyreloc
)
1704 if (ELIMINATE_COPY_RELOCS
)
1706 struct elf_s390_link_hash_entry
* eh
;
1707 struct elf_dyn_relocs
*p
;
1709 eh
= (struct elf_s390_link_hash_entry
*) h
;
1710 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1712 s
= p
->sec
->output_section
;
1713 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1717 /* If we didn't find any dynamic relocs in read-only sections, then
1718 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1726 /* We must allocate the symbol in our .dynbss section, which will
1727 become part of the .bss section of the executable. There will be
1728 an entry for this symbol in the .dynsym section. The dynamic
1729 object will contain position independent code, so all references
1730 from the dynamic object to this symbol will go through the global
1731 offset table. The dynamic linker will use the .dynsym entry to
1732 determine the address it must put in the global offset table, so
1733 both the dynamic object and the regular object will refer to the
1734 same memory location for the variable. */
1736 htab
= elf_s390_hash_table (info
);
1740 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1741 copy the initial value out of the dynamic object and into the
1742 runtime process image. */
1743 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1745 htab
->srelbss
->size
+= sizeof (Elf64_External_Rela
);
1751 return _bfd_elf_adjust_dynamic_copy (info
, h
, s
);
1754 /* Allocate space in .plt, .got and associated reloc sections for
1758 allocate_dynrelocs (struct elf_link_hash_entry
*h
,
1761 struct bfd_link_info
*info
;
1762 struct elf_s390_link_hash_table
*htab
;
1763 struct elf_s390_link_hash_entry
*eh
= (struct elf_s390_link_hash_entry
*)h
;
1764 struct elf_dyn_relocs
*p
;
1766 if (h
->root
.type
== bfd_link_hash_indirect
)
1769 info
= (struct bfd_link_info
*) inf
;
1770 htab
= elf_s390_hash_table (info
);
1774 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1775 here if it is defined and referenced in a non-shared object. */
1776 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
1777 return s390_elf_allocate_ifunc_dyn_relocs (info
, h
);
1778 else if (htab
->elf
.dynamic_sections_created
1779 && h
->plt
.refcount
> 0)
1781 /* Make sure this symbol is output as a dynamic symbol.
1782 Undefined weak syms won't yet be marked as dynamic. */
1783 if (h
->dynindx
== -1
1784 && !h
->forced_local
)
1786 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1790 if (bfd_link_pic (info
)
1791 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1793 asection
*s
= htab
->elf
.splt
;
1795 /* If this is the first .plt entry, make room for the special
1798 s
->size
+= PLT_FIRST_ENTRY_SIZE
;
1800 h
->plt
.offset
= s
->size
;
1802 /* If this symbol is not defined in a regular file, and we are
1803 not generating a shared library, then set the symbol to this
1804 location in the .plt. This is required to make function
1805 pointers compare as equal between the normal executable and
1806 the shared library. */
1807 if (! bfd_link_pic (info
)
1810 h
->root
.u
.def
.section
= s
;
1811 h
->root
.u
.def
.value
= h
->plt
.offset
;
1814 /* Make room for this entry. */
1815 s
->size
+= PLT_ENTRY_SIZE
;
1817 /* We also need to make an entry in the .got.plt section, which
1818 will be placed in the .got section by the linker script. */
1819 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
1821 /* We also need to make an entry in the .rela.plt section. */
1822 htab
->elf
.srelplt
->size
+= sizeof (Elf64_External_Rela
);
1826 h
->plt
.offset
= (bfd_vma
) -1;
1828 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1833 h
->plt
.offset
= (bfd_vma
) -1;
1835 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1838 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1839 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1840 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1841 we can save the dynamic TLS relocation. */
1842 if (h
->got
.refcount
> 0
1843 && !bfd_link_pic (info
)
1845 && elf_s390_hash_entry(h
)->tls_type
>= GOT_TLS_IE
)
1847 if (elf_s390_hash_entry(h
)->tls_type
== GOT_TLS_IE_NLT
)
1848 /* For the GOTIE access without a literal pool entry the offset has
1849 to be stored somewhere. The immediate value in the instruction
1850 is not bit enough so the value is stored in the got. */
1852 h
->got
.offset
= htab
->elf
.sgot
->size
;
1853 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
1856 h
->got
.offset
= (bfd_vma
) -1;
1858 else if (h
->got
.refcount
> 0)
1862 int tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1864 /* Make sure this symbol is output as a dynamic symbol.
1865 Undefined weak syms won't yet be marked as dynamic. */
1866 if (h
->dynindx
== -1
1867 && !h
->forced_local
)
1869 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1874 h
->got
.offset
= s
->size
;
1875 s
->size
+= GOT_ENTRY_SIZE
;
1876 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1877 if (tls_type
== GOT_TLS_GD
)
1878 s
->size
+= GOT_ENTRY_SIZE
;
1879 dyn
= htab
->elf
.dynamic_sections_created
;
1880 /* R_390_TLS_IE64 needs one dynamic relocation,
1881 R_390_TLS_GD64 needs one if local symbol and two if global. */
1882 if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1883 || tls_type
>= GOT_TLS_IE
)
1884 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1885 else if (tls_type
== GOT_TLS_GD
)
1886 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf64_External_Rela
);
1887 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1888 || h
->root
.type
!= bfd_link_hash_undefweak
)
1889 && (bfd_link_pic (info
)
1890 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1891 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1894 h
->got
.offset
= (bfd_vma
) -1;
1896 if (eh
->dyn_relocs
== NULL
)
1899 /* In the shared -Bsymbolic case, discard space allocated for
1900 dynamic pc-relative relocs against symbols which turn out to be
1901 defined in regular objects. For the normal shared case, discard
1902 space for pc-relative relocs that have become local due to symbol
1903 visibility changes. */
1905 if (bfd_link_pic (info
))
1907 if (SYMBOL_CALLS_LOCAL (info
, h
))
1909 struct elf_dyn_relocs
**pp
;
1911 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1913 p
->count
-= p
->pc_count
;
1922 /* Also discard relocs on undefined weak syms with non-default
1924 if (eh
->dyn_relocs
!= NULL
1925 && h
->root
.type
== bfd_link_hash_undefweak
)
1927 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1928 eh
->dyn_relocs
= NULL
;
1930 /* Make sure undefined weak symbols are output as a dynamic
1932 else if (h
->dynindx
== -1
1933 && !h
->forced_local
)
1935 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1940 else if (ELIMINATE_COPY_RELOCS
)
1942 /* For the non-shared case, discard space for relocs against
1943 symbols which turn out to need copy relocs or are not
1949 || (htab
->elf
.dynamic_sections_created
1950 && (h
->root
.type
== bfd_link_hash_undefweak
1951 || h
->root
.type
== bfd_link_hash_undefined
))))
1953 /* Make sure this symbol is output as a dynamic symbol.
1954 Undefined weak syms won't yet be marked as dynamic. */
1955 if (h
->dynindx
== -1
1956 && !h
->forced_local
)
1958 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1962 /* If that succeeded, we know we'll be keeping all the
1964 if (h
->dynindx
!= -1)
1968 eh
->dyn_relocs
= NULL
;
1973 /* Finally, allocate space. */
1974 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1976 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1977 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1983 /* Find any dynamic relocs that apply to read-only sections. */
1986 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
1988 struct elf_s390_link_hash_entry
*eh
;
1989 struct elf_dyn_relocs
*p
;
1991 eh
= (struct elf_s390_link_hash_entry
*) h
;
1992 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1994 asection
*s
= p
->sec
->output_section
;
1996 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1998 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
2000 info
->flags
|= DF_TEXTREL
;
2002 /* Not an error, just cut short the traversal. */
2009 /* Set the sizes of the dynamic sections. */
2012 elf_s390_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
2013 struct bfd_link_info
*info
)
2015 struct elf_s390_link_hash_table
*htab
;
2021 htab
= elf_s390_hash_table (info
);
2025 dynobj
= htab
->elf
.dynobj
;
2029 if (htab
->elf
.dynamic_sections_created
)
2031 /* Set the contents of the .interp section to the interpreter. */
2032 if (bfd_link_executable (info
) && !info
->nointerp
)
2034 s
= bfd_get_linker_section (dynobj
, ".interp");
2037 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
2038 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
2042 /* Set up .got offsets for local syms, and space for local dynamic
2044 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
2046 bfd_signed_vma
*local_got
;
2047 bfd_signed_vma
*end_local_got
;
2048 char *local_tls_type
;
2049 bfd_size_type locsymcount
;
2050 Elf_Internal_Shdr
*symtab_hdr
;
2052 struct plt_entry
*local_plt
;
2055 if (! is_s390_elf (ibfd
))
2058 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2060 struct elf_dyn_relocs
*p
;
2062 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
2064 if (!bfd_is_abs_section (p
->sec
)
2065 && bfd_is_abs_section (p
->sec
->output_section
))
2067 /* Input section has been discarded, either because
2068 it is a copy of a linkonce section or due to
2069 linker script /DISCARD/, so we'll be discarding
2072 else if (p
->count
!= 0)
2074 srela
= elf_section_data (p
->sec
)->sreloc
;
2075 srela
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
2076 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2077 info
->flags
|= DF_TEXTREL
;
2082 local_got
= elf_local_got_refcounts (ibfd
);
2086 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2087 locsymcount
= symtab_hdr
->sh_info
;
2088 end_local_got
= local_got
+ locsymcount
;
2089 local_tls_type
= elf_s390_local_got_tls_type (ibfd
);
2091 srela
= htab
->elf
.srelgot
;
2092 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
2096 *local_got
= s
->size
;
2097 s
->size
+= GOT_ENTRY_SIZE
;
2098 if (*local_tls_type
== GOT_TLS_GD
)
2099 s
->size
+= GOT_ENTRY_SIZE
;
2100 if (bfd_link_pic (info
))
2101 srela
->size
+= sizeof (Elf64_External_Rela
);
2104 *local_got
= (bfd_vma
) -1;
2107 local_plt
= elf_s390_local_plt (ibfd
);
2108 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
2110 if (local_plt
[i
].plt
.refcount
> 0)
2112 local_plt
[i
].plt
.offset
= htab
->elf
.iplt
->size
;
2113 htab
->elf
.iplt
->size
+= PLT_ENTRY_SIZE
;
2114 htab
->elf
.igotplt
->size
+= GOT_ENTRY_SIZE
;
2115 htab
->elf
.irelplt
->size
+= sizeof (Elf64_External_Rela
);
2118 local_plt
[i
].plt
.offset
= (bfd_vma
) -1;
2122 if (htab
->tls_ldm_got
.refcount
> 0)
2124 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2126 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2127 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2128 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
2131 htab
->tls_ldm_got
.offset
= -1;
2133 /* Allocate global sym .plt and .got entries, and space for global
2134 sym dynamic relocs. */
2135 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, info
);
2137 /* We now have determined the sizes of the various dynamic sections.
2138 Allocate memory for them. */
2140 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2142 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2145 if (s
== htab
->elf
.splt
2146 || s
== htab
->elf
.sgot
2147 || s
== htab
->elf
.sgotplt
2148 || s
== htab
->sdynbss
2149 || s
== htab
->elf
.iplt
2150 || s
== htab
->elf
.igotplt
2151 || s
== htab
->irelifunc
)
2153 /* Strip this section if we don't need it; see the
2156 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2158 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
2161 /* We use the reloc_count field as a counter if we need
2162 to copy relocs into the output file. */
2167 /* It's not one of our sections, so don't allocate space. */
2173 /* If we don't need this section, strip it from the
2174 output file. This is to handle .rela.bss and
2175 .rela.plt. We must create it in
2176 create_dynamic_sections, because it must be created
2177 before the linker maps input sections to output
2178 sections. The linker does that before
2179 adjust_dynamic_symbol is called, and it is that
2180 function which decides whether anything needs to go
2181 into these sections. */
2183 s
->flags
|= SEC_EXCLUDE
;
2187 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2190 /* Allocate memory for the section contents. We use bfd_zalloc
2191 here in case unused entries are not reclaimed before the
2192 section's contents are written out. This should not happen,
2193 but this way if it does, we get a R_390_NONE reloc instead
2195 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2196 if (s
->contents
== NULL
)
2200 if (htab
->elf
.dynamic_sections_created
)
2202 /* Add some entries to the .dynamic section. We fill in the
2203 values later, in elf_s390_finish_dynamic_sections, but we
2204 must add the entries now so that we get the correct size for
2205 the .dynamic section. The DT_DEBUG entry is filled in by the
2206 dynamic linker and used by the debugger. */
2207 #define add_dynamic_entry(TAG, VAL) \
2208 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2210 if (bfd_link_executable (info
))
2212 if (!add_dynamic_entry (DT_DEBUG
, 0))
2216 if (htab
->elf
.splt
->size
!= 0)
2218 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2219 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2220 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2221 || !add_dynamic_entry (DT_JMPREL
, 0))
2227 if (!add_dynamic_entry (DT_RELA
, 0)
2228 || !add_dynamic_entry (DT_RELASZ
, 0)
2229 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2232 /* If any dynamic relocs apply to a read-only section,
2233 then we need a DT_TEXTREL entry. */
2234 if ((info
->flags
& DF_TEXTREL
) == 0)
2235 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2238 if ((info
->flags
& DF_TEXTREL
) != 0)
2240 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2245 #undef add_dynamic_entry
2250 /* Return the base VMA address which should be subtracted from real addresses
2251 when resolving @dtpoff relocation.
2252 This is PT_TLS segment p_vaddr. */
2255 dtpoff_base (struct bfd_link_info
*info
)
2257 /* If tls_sec is NULL, we should have signalled an error already. */
2258 if (elf_hash_table (info
)->tls_sec
== NULL
)
2260 return elf_hash_table (info
)->tls_sec
->vma
;
2263 /* Return the relocation value for @tpoff relocation
2264 if STT_TLS virtual address is ADDRESS. */
2267 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2269 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2271 /* If tls_sec is NULL, we should have signalled an error already. */
2272 if (htab
->tls_sec
== NULL
)
2274 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2277 /* Complain if TLS instruction relocation is against an invalid
2281 invalid_tls_insn (bfd
*input_bfd
,
2282 asection
*input_section
,
2283 Elf_Internal_Rela
*rel
)
2285 reloc_howto_type
*howto
;
2287 howto
= elf_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
2288 (*_bfd_error_handler
)
2289 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2292 (long) rel
->r_offset
,
2294 bfd_set_error (bfd_error_bad_value
);
2297 /* Relocate a 390 ELF section. */
2300 elf_s390_relocate_section (bfd
*output_bfd
,
2301 struct bfd_link_info
*info
,
2303 asection
*input_section
,
2305 Elf_Internal_Rela
*relocs
,
2306 Elf_Internal_Sym
*local_syms
,
2307 asection
**local_sections
)
2309 struct elf_s390_link_hash_table
*htab
;
2310 Elf_Internal_Shdr
*symtab_hdr
;
2311 struct elf_link_hash_entry
**sym_hashes
;
2312 bfd_vma
*local_got_offsets
;
2313 Elf_Internal_Rela
*rel
;
2314 Elf_Internal_Rela
*relend
;
2316 BFD_ASSERT (is_s390_elf (input_bfd
));
2318 htab
= elf_s390_hash_table (info
);
2322 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2323 sym_hashes
= elf_sym_hashes (input_bfd
);
2324 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2327 relend
= relocs
+ input_section
->reloc_count
;
2328 for (; rel
< relend
; rel
++)
2330 unsigned int r_type
;
2331 reloc_howto_type
*howto
;
2332 unsigned long r_symndx
;
2333 struct elf_link_hash_entry
*h
;
2334 Elf_Internal_Sym
*sym
;
2338 bfd_boolean unresolved_reloc
;
2339 bfd_reloc_status_type r
;
2341 asection
*base_got
= htab
->elf
.sgot
;
2343 r_type
= ELF64_R_TYPE (rel
->r_info
);
2344 if (r_type
== (int) R_390_GNU_VTINHERIT
2345 || r_type
== (int) R_390_GNU_VTENTRY
)
2347 if (r_type
>= (int) R_390_max
)
2349 bfd_set_error (bfd_error_bad_value
);
2353 howto
= elf_howto_table
+ r_type
;
2354 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2359 unresolved_reloc
= FALSE
;
2360 if (r_symndx
< symtab_hdr
->sh_info
)
2362 sym
= local_syms
+ r_symndx
;
2363 sec
= local_sections
[r_symndx
];
2365 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2367 struct plt_entry
*local_plt
= elf_s390_local_plt (input_bfd
);
2368 if (local_plt
== NULL
)
2371 /* Address of the PLT slot. */
2372 relocation
= (htab
->elf
.iplt
->output_section
->vma
2373 + htab
->elf
.iplt
->output_offset
2374 + local_plt
[r_symndx
].plt
.offset
);
2378 case R_390_PLTOFF16
:
2379 case R_390_PLTOFF32
:
2380 case R_390_PLTOFF64
:
2381 relocation
-= htab
->elf
.sgot
->output_section
->vma
;
2383 case R_390_GOTPLT12
:
2384 case R_390_GOTPLT16
:
2385 case R_390_GOTPLT20
:
2386 case R_390_GOTPLT32
:
2387 case R_390_GOTPLT64
:
2388 case R_390_GOTPLTENT
:
2396 /* Write the PLT slot address into the GOT slot. */
2397 bfd_put_64 (output_bfd
, relocation
,
2398 htab
->elf
.sgot
->contents
+
2399 local_got_offsets
[r_symndx
]);
2400 relocation
= (local_got_offsets
[r_symndx
] +
2401 htab
->elf
.sgot
->output_offset
);
2403 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2404 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2410 /* The output section is needed later in
2411 finish_dynamic_section when creating the dynamic
2413 local_plt
[r_symndx
].sec
= sec
;
2417 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2421 bfd_boolean warned ATTRIBUTE_UNUSED
;
2422 bfd_boolean ignored ATTRIBUTE_UNUSED
;
2424 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2425 r_symndx
, symtab_hdr
, sym_hashes
,
2427 unresolved_reloc
, warned
, ignored
);
2430 if (sec
!= NULL
&& discarded_section (sec
))
2431 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2432 rel
, 1, relend
, howto
, 0, contents
);
2434 if (bfd_link_relocatable (info
))
2439 case R_390_GOTPLT12
:
2440 case R_390_GOTPLT16
:
2441 case R_390_GOTPLT20
:
2442 case R_390_GOTPLT32
:
2443 case R_390_GOTPLT64
:
2444 case R_390_GOTPLTENT
:
2445 /* There are three cases for a GOTPLT relocation. 1) The
2446 relocation is against the jump slot entry of a plt that
2447 will get emitted to the output file. 2) The relocation
2448 is against the jump slot of a plt entry that has been
2449 removed. elf_s390_adjust_gotplt has created a GOT entry
2450 as replacement. 3) The relocation is against a local symbol.
2451 Cases 2) and 3) are the same as the GOT relocation code
2452 so we just have to test for case 1 and fall through for
2454 if (h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
2458 if (s390_is_ifunc_symbol_p (h
))
2460 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2461 relocation
= (plt_index
* GOT_ENTRY_SIZE
+
2462 htab
->elf
.igotplt
->output_offset
);
2463 if (r_type
== R_390_GOTPLTENT
)
2464 relocation
+= htab
->elf
.igotplt
->output_section
->vma
;
2469 Current offset - size first entry / entry size. */
2470 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) /
2473 /* Offset in GOT is PLT index plus GOT headers(3)
2474 times 4, addr & GOT addr. */
2475 relocation
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2476 if (r_type
== R_390_GOTPLTENT
)
2477 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2479 unresolved_reloc
= FALSE
;
2490 /* Relocation is to the entry for this symbol in the global
2492 if (base_got
== NULL
)
2499 off
= h
->got
.offset
;
2500 dyn
= htab
->elf
.dynamic_sections_created
;
2502 if (s390_is_ifunc_symbol_p (h
))
2504 BFD_ASSERT (h
->plt
.offset
!= (bfd_vma
) -1);
2505 if (off
== (bfd_vma
)-1)
2507 /* No explicit GOT usage so redirect to the
2509 base_got
= htab
->elf
.igotplt
;
2510 off
= h
->plt
.offset
/ PLT_ENTRY_SIZE
* GOT_ENTRY_SIZE
;
2514 /* Explicit GOT slots must contain the address
2515 of the PLT slot. This will be handled in
2516 finish_dynamic_symbol. */
2519 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
,
2520 bfd_link_pic (info
),
2522 || (bfd_link_pic (info
)
2523 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2524 || (ELF_ST_VISIBILITY (h
->other
)
2525 && h
->root
.type
== bfd_link_hash_undefweak
))
2527 /* This is actually a static link, or it is a
2528 -Bsymbolic link and the symbol is defined
2529 locally, or the symbol was forced to be local
2530 because of a version file. We must initialize
2531 this entry in the global offset table. Since the
2532 offset must always be a multiple of 2, we use the
2533 least significant bit to record whether we have
2534 initialized it already.
2536 When doing a dynamic link, we create a .rel.got
2537 relocation entry to initialize the value. This
2538 is done in the finish_dynamic_symbol routine. */
2543 bfd_put_64 (output_bfd
, relocation
,
2544 base_got
->contents
+ off
);
2549 && bfd_link_pic (info
)
2550 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2551 /* lgrl rx,sym@GOTENT -> larl rx, sym */
2552 && ((r_type
== R_390_GOTENT
2553 && (bfd_get_16 (input_bfd
,
2554 contents
+ rel
->r_offset
- 2)
2555 & 0xff0f) == 0xc408)
2556 /* lg rx, sym@GOT(r12) -> larl rx, sym */
2557 || (r_type
== R_390_GOT20
2558 && (bfd_get_32 (input_bfd
,
2559 contents
+ rel
->r_offset
- 2)
2560 & 0xff00f000) == 0xe300c000
2561 && bfd_get_8 (input_bfd
,
2562 contents
+ rel
->r_offset
+ 3) == 0x04)))
2565 unsigned short new_insn
=
2566 (0xc000 | (bfd_get_8 (input_bfd
,
2567 contents
+ rel
->r_offset
- 1) & 0xf0));
2568 bfd_put_16 (output_bfd
, new_insn
,
2569 contents
+ rel
->r_offset
- 2);
2570 r_type
= R_390_PC32DBL
;
2572 howto
= elf_howto_table
+ r_type
;
2573 relocation
= h
->root
.u
.def
.value
2574 + h
->root
.u
.def
.section
->output_section
->vma
2575 + h
->root
.u
.def
.section
->output_offset
;
2580 unresolved_reloc
= FALSE
;
2584 if (local_got_offsets
== NULL
)
2587 off
= local_got_offsets
[r_symndx
];
2589 /* The offset must always be a multiple of 8. We use
2590 the least significant bit to record whether we have
2591 already generated the necessary reloc. */
2596 bfd_put_64 (output_bfd
, relocation
,
2597 htab
->elf
.sgot
->contents
+ off
);
2599 if (bfd_link_pic (info
))
2602 Elf_Internal_Rela outrel
;
2605 s
= htab
->elf
.srelgot
;
2609 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2610 + htab
->elf
.sgot
->output_offset
2612 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2613 outrel
.r_addend
= relocation
;
2615 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2616 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2619 local_got_offsets
[r_symndx
] |= 1;
2623 if (off
>= (bfd_vma
) -2)
2626 relocation
= base_got
->output_offset
+ off
;
2628 /* For @GOTENT the relocation is against the offset between
2629 the instruction and the symbols entry in the GOT and not
2630 between the start of the GOT and the symbols entry. We
2631 add the vma of the GOT to get the correct value. */
2632 if ( r_type
== R_390_GOTENT
2633 || r_type
== R_390_GOTPLTENT
)
2634 relocation
+= base_got
->output_section
->vma
;
2638 case R_390_GOTOFF16
:
2639 case R_390_GOTOFF32
:
2640 case R_390_GOTOFF64
:
2641 /* Relocation is relative to the start of the global offset
2644 /* Note that sgot->output_offset is not involved in this
2645 calculation. We always want the start of .got. If we
2646 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2647 permitted by the ABI, we might have to change this
2649 relocation
-= htab
->elf
.sgot
->output_section
->vma
;
2653 case R_390_GOTPCDBL
:
2654 /* Use global offset table as symbol value. */
2655 relocation
= htab
->elf
.sgot
->output_section
->vma
;
2656 unresolved_reloc
= FALSE
;
2659 case R_390_PLT12DBL
:
2660 case R_390_PLT16DBL
:
2661 case R_390_PLT24DBL
:
2663 case R_390_PLT32DBL
:
2665 /* Relocation is to the entry for this symbol in the
2666 procedure linkage table. */
2668 /* Resolve a PLT32 reloc against a local symbol directly,
2669 without using the procedure linkage table. */
2673 if (h
->plt
.offset
== (bfd_vma
) -1
2674 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2676 /* We didn't make a PLT entry for this symbol. This
2677 happens when statically linking PIC code, or when
2678 using -Bsymbolic. */
2681 if (s390_is_ifunc_symbol_p (h
))
2682 relocation
= (htab
->elf
.iplt
->output_section
->vma
2683 + htab
->elf
.iplt
->output_offset
2686 relocation
= (htab
->elf
.splt
->output_section
->vma
2687 + htab
->elf
.splt
->output_offset
2689 unresolved_reloc
= FALSE
;
2692 case R_390_PLTOFF16
:
2693 case R_390_PLTOFF32
:
2694 case R_390_PLTOFF64
:
2695 /* Relocation is to the entry for this symbol in the
2696 procedure linkage table relative to the start of the GOT. */
2698 /* For local symbols or if we didn't make a PLT entry for
2699 this symbol resolve the symbol directly. */
2701 || h
->plt
.offset
== (bfd_vma
) -1
2702 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2704 relocation
-= htab
->elf
.sgot
->output_section
->vma
;
2708 if (s390_is_ifunc_symbol_p (h
))
2709 relocation
= (htab
->elf
.iplt
->output_section
->vma
2710 + htab
->elf
.iplt
->output_offset
2712 - htab
->elf
.sgot
->output_section
->vma
);
2714 relocation
= (htab
->elf
.splt
->output_section
->vma
2715 + htab
->elf
.splt
->output_offset
2717 - htab
->elf
.sgot
->output_section
->vma
);
2718 unresolved_reloc
= FALSE
;
2728 /* The target of these relocs are instruction operands
2729 residing in read-only sections. We cannot emit a runtime
2732 && s390_is_ifunc_symbol_p (h
)
2734 && bfd_link_pic (info
))
2736 relocation
= (htab
->elf
.iplt
->output_section
->vma
2737 + htab
->elf
.iplt
->output_offset
2748 && s390_is_ifunc_symbol_p (h
)
2751 if (!bfd_link_pic (info
) || !h
->non_got_ref
)
2753 /* For a non-shared object STT_GNU_IFUNC symbol must
2755 relocation
= (htab
->elf
.iplt
->output_section
->vma
2756 + htab
->elf
.iplt
->output_offset
2762 /* For shared objects a runtime relocation is needed. */
2764 Elf_Internal_Rela outrel
;
2767 /* Need a dynamic relocation to get the real function
2769 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2773 if (outrel
.r_offset
== (bfd_vma
) -1
2774 || outrel
.r_offset
== (bfd_vma
) -2)
2777 outrel
.r_offset
+= (input_section
->output_section
->vma
2778 + input_section
->output_offset
);
2780 if (h
->dynindx
== -1
2782 || bfd_link_executable (info
))
2784 /* This symbol is resolved locally. */
2785 outrel
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
2786 outrel
.r_addend
= (h
->root
.u
.def
.value
2787 + h
->root
.u
.def
.section
->output_section
->vma
2788 + h
->root
.u
.def
.section
->output_offset
);
2792 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2793 outrel
.r_addend
= 0;
2796 sreloc
= htab
->elf
.irelifunc
;
2797 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2799 /* If this reloc is against an external symbol, we
2800 do not want to fiddle with the addend. Otherwise,
2801 we need to include the symbol value so that it
2802 becomes an addend for the dynamic reloc. For an
2803 internal symbol, we have updated addend. */
2808 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2811 if ((bfd_link_pic (info
)
2813 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2814 || h
->root
.type
!= bfd_link_hash_undefweak
)
2815 && ((r_type
!= R_390_PC16
2816 && r_type
!= R_390_PC12DBL
2817 && r_type
!= R_390_PC16DBL
2818 && r_type
!= R_390_PC24DBL
2819 && r_type
!= R_390_PC32
2820 && r_type
!= R_390_PC32DBL
2821 && r_type
!= R_390_PC64
)
2822 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2823 || (ELIMINATE_COPY_RELOCS
2824 && !bfd_link_pic (info
)
2830 || h
->root
.type
== bfd_link_hash_undefweak
2831 || h
->root
.type
== bfd_link_hash_undefined
)))
2833 Elf_Internal_Rela outrel
;
2834 bfd_boolean skip
, relocate
;
2838 /* When generating a shared object, these relocations
2839 are copied into the output file to be resolved at run
2845 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2847 if (outrel
.r_offset
== (bfd_vma
) -1)
2849 else if (outrel
.r_offset
== (bfd_vma
) -2)
2850 skip
= TRUE
, relocate
= TRUE
;
2852 outrel
.r_offset
+= (input_section
->output_section
->vma
2853 + input_section
->output_offset
);
2856 memset (&outrel
, 0, sizeof outrel
);
2859 && (r_type
== R_390_PC16
2860 || r_type
== R_390_PC12DBL
2861 || r_type
== R_390_PC16DBL
2862 || r_type
== R_390_PC24DBL
2863 || r_type
== R_390_PC32
2864 || r_type
== R_390_PC32DBL
2865 || r_type
== R_390_PC64
2866 || !bfd_link_pic (info
)
2867 || !SYMBOLIC_BIND (info
, h
)
2868 || !h
->def_regular
))
2870 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2871 outrel
.r_addend
= rel
->r_addend
;
2875 /* This symbol is local, or marked to become local. */
2876 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2877 if (r_type
== R_390_64
)
2880 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2886 if (bfd_is_abs_section (sec
))
2888 else if (sec
== NULL
|| sec
->owner
== NULL
)
2890 bfd_set_error(bfd_error_bad_value
);
2897 osec
= sec
->output_section
;
2898 sindx
= elf_section_data (osec
)->dynindx
;
2902 osec
= htab
->elf
.text_index_section
;
2903 sindx
= elf_section_data (osec
)->dynindx
;
2905 BFD_ASSERT (sindx
!= 0);
2907 /* We are turning this relocation into one
2908 against a section symbol, so subtract out
2909 the output section's address but not the
2910 offset of the input section in the output
2912 outrel
.r_addend
-= osec
->vma
;
2914 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
2918 sreloc
= elf_section_data (input_section
)->sreloc
;
2922 loc
= sreloc
->contents
;
2923 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2924 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2926 /* If this reloc is against an external symbol, we do
2927 not want to fiddle with the addend. Otherwise, we
2928 need to include the symbol value so that it becomes
2929 an addend for the dynamic reloc. */
2936 /* Relocations for tls literal pool entries. */
2937 case R_390_TLS_IE64
:
2938 if (bfd_link_pic (info
))
2940 Elf_Internal_Rela outrel
;
2944 outrel
.r_offset
= rel
->r_offset
2945 + input_section
->output_section
->vma
2946 + input_section
->output_offset
;
2947 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2948 sreloc
= elf_section_data (input_section
)->sreloc
;
2951 loc
= sreloc
->contents
;
2952 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2953 bfd_elf64_swap_reloc_out (output_bfd
, &outrel
, loc
);
2957 case R_390_TLS_GD64
:
2958 case R_390_TLS_GOTIE64
:
2959 r_type
= elf_s390_tls_transition (info
, r_type
, h
== NULL
);
2960 tls_type
= GOT_UNKNOWN
;
2961 if (h
== NULL
&& local_got_offsets
)
2962 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2965 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2966 if (!bfd_link_pic (info
) && h
->dynindx
== -1 && tls_type
>= GOT_TLS_IE
)
2967 r_type
= R_390_TLS_LE64
;
2969 if (r_type
== R_390_TLS_GD64
&& tls_type
>= GOT_TLS_IE
)
2970 r_type
= R_390_TLS_IE64
;
2972 if (r_type
== R_390_TLS_LE64
)
2974 /* This relocation gets optimized away by the local exec
2975 access optimization. */
2976 BFD_ASSERT (! unresolved_reloc
);
2977 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2978 contents
+ rel
->r_offset
);
2982 if (htab
->elf
.sgot
== NULL
)
2986 off
= h
->got
.offset
;
2989 if (local_got_offsets
== NULL
)
2992 off
= local_got_offsets
[r_symndx
];
3001 Elf_Internal_Rela outrel
;
3005 if (htab
->elf
.srelgot
== NULL
)
3008 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3009 + htab
->elf
.sgot
->output_offset
+ off
);
3011 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
3012 if (r_type
== R_390_TLS_GD64
)
3013 dr_type
= R_390_TLS_DTPMOD
;
3015 dr_type
= R_390_TLS_TPOFF
;
3016 if (dr_type
== R_390_TLS_TPOFF
&& indx
== 0)
3017 outrel
.r_addend
= relocation
- dtpoff_base (info
);
3019 outrel
.r_addend
= 0;
3020 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
3021 loc
= htab
->elf
.srelgot
->contents
;
3022 loc
+= htab
->elf
.srelgot
->reloc_count
++
3023 * sizeof (Elf64_External_Rela
);
3024 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3026 if (r_type
== R_390_TLS_GD64
)
3030 BFD_ASSERT (! unresolved_reloc
);
3031 bfd_put_64 (output_bfd
,
3032 relocation
- dtpoff_base (info
),
3033 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3037 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_DTPOFF
);
3038 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
3039 outrel
.r_addend
= 0;
3040 htab
->elf
.srelgot
->reloc_count
++;
3041 loc
+= sizeof (Elf64_External_Rela
);
3042 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3049 local_got_offsets
[r_symndx
] |= 1;
3052 if (off
>= (bfd_vma
) -2)
3054 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
3056 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
3057 if (r_type
== R_390_TLS_IE64
|| r_type
== R_390_TLS_IEENT
)
3058 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
3059 unresolved_reloc
= FALSE
;
3063 bfd_put_64 (output_bfd
, htab
->elf
.sgot
->output_offset
+ off
,
3064 contents
+ rel
->r_offset
);
3069 case R_390_TLS_GOTIE12
:
3070 case R_390_TLS_GOTIE20
:
3071 case R_390_TLS_IEENT
:
3074 if (local_got_offsets
== NULL
)
3076 off
= local_got_offsets
[r_symndx
];
3077 if (bfd_link_pic (info
))
3078 goto emit_tls_relocs
;
3082 off
= h
->got
.offset
;
3083 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
3084 if (bfd_link_pic (info
) || h
->dynindx
!= -1 || tls_type
< GOT_TLS_IE
)
3085 goto emit_tls_relocs
;
3088 if (htab
->elf
.sgot
== NULL
)
3091 BFD_ASSERT (! unresolved_reloc
);
3092 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
3093 htab
->elf
.sgot
->contents
+ off
);
3094 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
3095 if (r_type
== R_390_TLS_IEENT
)
3096 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
3097 unresolved_reloc
= FALSE
;
3100 case R_390_TLS_LDM64
:
3101 if (! bfd_link_pic (info
))
3102 /* The literal pool entry this relocation refers to gets ignored
3103 by the optimized code of the local exec model. Do nothing
3104 and the value will turn out zero. */
3107 if (htab
->elf
.sgot
== NULL
)
3110 off
= htab
->tls_ldm_got
.offset
;
3115 Elf_Internal_Rela outrel
;
3118 if (htab
->elf
.srelgot
== NULL
)
3121 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3122 + htab
->elf
.sgot
->output_offset
+ off
);
3124 bfd_put_64 (output_bfd
, 0,
3125 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3126 outrel
.r_info
= ELF64_R_INFO (0, R_390_TLS_DTPMOD
);
3127 outrel
.r_addend
= 0;
3128 loc
= htab
->elf
.srelgot
->contents
;
3129 loc
+= htab
->elf
.srelgot
->reloc_count
++
3130 * sizeof (Elf64_External_Rela
);
3131 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3132 htab
->tls_ldm_got
.offset
|= 1;
3134 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
3135 unresolved_reloc
= FALSE
;
3138 case R_390_TLS_LE64
:
3139 if (bfd_link_dll (info
))
3141 /* Linking a shared library with non-fpic code requires
3142 a R_390_TLS_TPOFF relocation. */
3143 Elf_Internal_Rela outrel
;
3148 outrel
.r_offset
= rel
->r_offset
3149 + input_section
->output_section
->vma
3150 + input_section
->output_offset
;
3151 if (h
!= NULL
&& h
->dynindx
!= -1)
3155 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_TPOFF
);
3157 outrel
.r_addend
= relocation
- dtpoff_base (info
);
3159 outrel
.r_addend
= 0;
3160 sreloc
= elf_section_data (input_section
)->sreloc
;
3163 loc
= sreloc
->contents
;
3164 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3165 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3169 BFD_ASSERT (! unresolved_reloc
);
3170 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
3171 contents
+ rel
->r_offset
);
3175 case R_390_TLS_LDO64
:
3176 if (bfd_link_pic (info
) || (input_section
->flags
& SEC_DEBUGGING
))
3177 relocation
-= dtpoff_base (info
);
3179 /* When converting LDO to LE, we must negate. */
3180 relocation
= -tpoff (info
, relocation
);
3183 /* Relocations for tls instructions. */
3184 case R_390_TLS_LOAD
:
3185 case R_390_TLS_GDCALL
:
3186 case R_390_TLS_LDCALL
:
3187 tls_type
= GOT_UNKNOWN
;
3188 if (h
== NULL
&& local_got_offsets
)
3189 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
3191 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
3193 if (tls_type
== GOT_TLS_GD
)
3196 if (r_type
== R_390_TLS_LOAD
)
3198 if (!bfd_link_pic (info
) && (h
== NULL
|| h
->dynindx
== -1))
3200 /* IE->LE transition. Four valid cases:
3201 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3202 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3203 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3204 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3205 unsigned int insn0
, insn1
, ry
;
3207 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3208 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3209 if (insn1
!= 0x0004)
3210 invalid_tls_insn (input_bfd
, input_section
, rel
);
3212 if ((insn0
& 0xff00f000) == 0xe3000000)
3213 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3214 ry
= (insn0
& 0x000f0000);
3215 else if ((insn0
& 0xff0f0000) == 0xe3000000)
3216 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3217 ry
= (insn0
& 0x0000f000) << 4;
3218 else if ((insn0
& 0xff00f000) == 0xe300c000)
3219 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3220 ry
= (insn0
& 0x000f0000);
3221 else if ((insn0
& 0xff0f0000) == 0xe30c0000)
3222 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3223 ry
= (insn0
& 0x0000f000) << 4;
3225 invalid_tls_insn (input_bfd
, input_section
, rel
);
3226 insn0
= 0xeb000000 | (insn0
& 0x00f00000) | ry
;
3228 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3229 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3232 else if (r_type
== R_390_TLS_GDCALL
)
3234 unsigned int insn0
, insn1
;
3236 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3237 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3238 if ((insn0
& 0xffff0000) != 0xc0e50000)
3239 invalid_tls_insn (input_bfd
, input_section
, rel
);
3240 if (!bfd_link_pic (info
) && (h
== NULL
|| h
->dynindx
== -1))
3242 /* GD->LE transition.
3243 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3249 /* GD->IE transition.
3250 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3254 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3255 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3257 else if (r_type
== R_390_TLS_LDCALL
)
3259 if (!bfd_link_pic (info
))
3261 unsigned int insn0
, insn1
;
3263 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3264 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3265 if ((insn0
& 0xffff0000) != 0xc0e50000)
3266 invalid_tls_insn (input_bfd
, input_section
, rel
);
3267 /* LD->LE transition.
3268 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3271 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3272 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3281 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3282 because such sections are not SEC_ALLOC and thus ld.so will
3283 not process them. */
3284 if (unresolved_reloc
3285 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3287 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3288 rel
->r_offset
) != (bfd_vma
) -1)
3289 (*_bfd_error_handler
)
3290 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3293 (long) rel
->r_offset
,
3295 h
->root
.root
.string
);
3299 /* When applying a 24 bit reloc we need to start one byte
3300 earlier. Otherwise the 32 bit get/put bfd operations might
3301 access a byte after the actual section. */
3302 if (r_type
== R_390_PC24DBL
3303 || r_type
== R_390_PLT24DBL
)
3306 if (r_type
== R_390_20
3307 || r_type
== R_390_GOT20
3308 || r_type
== R_390_GOTPLT20
3309 || r_type
== R_390_TLS_GOTIE20
)
3311 relocation
+= rel
->r_addend
;
3312 relocation
= (relocation
&0xfff) << 8 | (relocation
&0xff000) >> 12;
3313 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3314 contents
, rel
->r_offset
,
3318 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3319 contents
, rel
->r_offset
,
3320 relocation
, rel
->r_addend
);
3322 if (r
!= bfd_reloc_ok
)
3327 name
= h
->root
.root
.string
;
3330 name
= bfd_elf_string_from_elf_section (input_bfd
,
3331 symtab_hdr
->sh_link
,
3336 name
= bfd_section_name (input_bfd
, sec
);
3339 if (r
== bfd_reloc_overflow
)
3342 if (! ((*info
->callbacks
->reloc_overflow
)
3343 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3344 (bfd_vma
) 0, input_bfd
, input_section
,
3350 (*_bfd_error_handler
)
3351 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3352 input_bfd
, input_section
,
3353 (long) rel
->r_offset
, name
, (int) r
);
3362 /* Generate the PLT slots together with the dynamic relocations needed
3363 for IFUNC symbols. */
3366 elf_s390_finish_ifunc_symbol (bfd
*output_bfd
,
3367 struct bfd_link_info
*info
,
3368 struct elf_link_hash_entry
*h
,
3369 struct elf_s390_link_hash_table
*htab
,
3371 bfd_vma resolver_address
)
3375 Elf_Internal_Rela rela
;
3377 asection
*plt
, *gotplt
, *relplt
;
3379 if (htab
->elf
.iplt
== NULL
3380 || htab
->elf
.igotplt
== NULL
3381 || htab
->elf
.irelplt
== NULL
)
3384 /* Index of the PLT slot within iplt section. */
3385 plt_index
= plt_offset
/ PLT_ENTRY_SIZE
;
3386 plt
= htab
->elf
.iplt
;
3387 /* Offset into the igot.plt section. */
3388 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3389 gotplt
= htab
->elf
.igotplt
;
3390 relplt
= htab
->elf
.irelplt
;
3392 /* Fill in the blueprint of a PLT. */
3393 memcpy (plt
->contents
+ plt_offset
, elf_s390x_plt_entry
,
3396 /* Fixup the relative address to the GOT entry */
3397 bfd_put_32 (output_bfd
,
3398 (gotplt
->output_section
->vma
+
3399 gotplt
->output_offset
+ got_offset
3400 - (plt
->output_section
->vma
+
3401 plt
->output_offset
+
3403 plt
->contents
+ plt_offset
+ 2);
3404 /* Fixup the relative branch to PLT 0 */
3405 bfd_put_32 (output_bfd
, - (plt
->output_offset
+
3406 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3407 plt
->contents
+ plt_offset
+ 24);
3408 /* Fixup offset into .rela.plt section. */
3409 bfd_put_32 (output_bfd
, relplt
->output_offset
+
3410 plt_index
* sizeof (Elf64_External_Rela
),
3411 plt
->contents
+ plt_offset
+ 28);
3413 /* Fill in the entry in the global offset table.
3414 Points to instruction after GOT offset. */
3415 bfd_put_64 (output_bfd
,
3416 (plt
->output_section
->vma
3417 + plt
->output_offset
3420 gotplt
->contents
+ got_offset
);
3422 /* Fill in the entry in the .rela.plt section. */
3423 rela
.r_offset
= (gotplt
->output_section
->vma
3424 + gotplt
->output_offset
3429 || ((bfd_link_executable (info
)
3430 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
3433 /* The symbol can be locally resolved. */
3434 rela
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
3435 rela
.r_addend
= resolver_address
;
3439 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3443 loc
= relplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
3444 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3448 /* Finish up dynamic symbol handling. We set the contents of various
3449 dynamic sections here. */
3452 elf_s390_finish_dynamic_symbol (bfd
*output_bfd
,
3453 struct bfd_link_info
*info
,
3454 struct elf_link_hash_entry
*h
,
3455 Elf_Internal_Sym
*sym
)
3457 struct elf_s390_link_hash_table
*htab
;
3458 struct elf_s390_link_hash_entry
*eh
= (struct elf_s390_link_hash_entry
*)h
;
3460 htab
= elf_s390_hash_table (info
);
3464 if (h
->plt
.offset
!= (bfd_vma
) -1)
3468 Elf_Internal_Rela rela
;
3471 /* This symbol has an entry in the procedure linkage table. Set
3473 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
3475 elf_s390_finish_ifunc_symbol (output_bfd
, info
, h
,
3476 htab
, h
->plt
.offset
,
3477 eh
->ifunc_resolver_address
+
3478 eh
->ifunc_resolver_section
->output_offset
+
3479 eh
->ifunc_resolver_section
->output_section
->vma
);
3481 /* Do not return yet. Handling of explicit GOT slots of
3482 IFUNC symbols is below. */
3486 if (h
->dynindx
== -1
3487 || htab
->elf
.splt
== NULL
3488 || htab
->elf
.sgotplt
== NULL
3489 || htab
->elf
.srelplt
== NULL
)
3493 Current offset - size first entry / entry size. */
3494 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3496 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3498 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3500 /* Fill in the blueprint of a PLT. */
3501 memcpy (htab
->elf
.splt
->contents
+ h
->plt
.offset
, elf_s390x_plt_entry
,
3504 /* Fixup the relative address to the GOT entry */
3505 bfd_put_32 (output_bfd
,
3506 (htab
->elf
.sgotplt
->output_section
->vma
+
3507 htab
->elf
.sgotplt
->output_offset
+ got_offset
3508 - (htab
->elf
.splt
->output_section
->vma
+
3509 htab
->elf
.splt
->output_offset
+
3511 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 2);
3512 /* Fixup the relative branch to PLT 0 */
3513 bfd_put_32 (output_bfd
, - (PLT_FIRST_ENTRY_SIZE
+
3514 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3515 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 24);
3516 /* Fixup offset into .rela.plt section. */
3517 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf64_External_Rela
),
3518 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 28);
3520 /* Fill in the entry in the global offset table.
3521 Points to instruction after GOT offset. */
3522 bfd_put_64 (output_bfd
,
3523 (htab
->elf
.splt
->output_section
->vma
3524 + htab
->elf
.splt
->output_offset
3527 htab
->elf
.sgotplt
->contents
+ got_offset
);
3529 /* Fill in the entry in the .rela.plt section. */
3530 rela
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3531 + htab
->elf
.sgotplt
->output_offset
3533 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3535 loc
= htab
->elf
.srelplt
->contents
+ plt_index
*
3536 sizeof (Elf64_External_Rela
);
3537 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3539 if (!h
->def_regular
)
3541 /* Mark the symbol as undefined, rather than as defined in
3542 the .plt section. Leave the value alone. This is a clue
3543 for the dynamic linker, to make function pointer
3544 comparisons work between an application and shared
3546 sym
->st_shndx
= SHN_UNDEF
;
3551 if (h
->got
.offset
!= (bfd_vma
) -1
3552 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3553 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE
3554 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE_NLT
)
3556 Elf_Internal_Rela rela
;
3559 /* This symbol has an entry in the global offset table. Set it
3561 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
3564 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3565 + htab
->elf
.sgot
->output_offset
3566 + (h
->got
.offset
&~ (bfd_vma
) 1));
3568 if (h
->def_regular
&& s390_is_ifunc_symbol_p (h
))
3570 if (bfd_link_pic (info
))
3572 /* An explicit GOT slot usage needs GLOB_DAT. If the
3573 symbol references local the implicit got.iplt slot
3574 will be used and the IRELATIVE reloc has been created
3580 /* For non-shared objects explicit GOT slots must be
3581 filled with the PLT slot address for pointer
3582 equality reasons. */
3583 bfd_put_64 (output_bfd
, (htab
->elf
.iplt
->output_section
->vma
3584 + htab
->elf
.iplt
->output_offset
3586 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3590 else if (bfd_link_pic (info
)
3591 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3593 /* If this is a static link, or it is a -Bsymbolic link and
3594 the symbol is defined locally or was forced to be local
3595 because of a version file, we just want to emit a
3596 RELATIVE reloc. The entry in the global offset table
3597 will already have been initialized in the
3598 relocate_section function. */
3599 if (!h
->def_regular
)
3601 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3602 rela
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
3603 rela
.r_addend
= (h
->root
.u
.def
.value
3604 + h
->root
.u
.def
.section
->output_section
->vma
3605 + h
->root
.u
.def
.section
->output_offset
);
3609 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3611 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3612 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_GLOB_DAT
);
3616 loc
= htab
->elf
.srelgot
->contents
;
3617 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3618 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3623 Elf_Internal_Rela rela
;
3626 /* This symbols needs a copy reloc. Set it up. */
3628 if (h
->dynindx
== -1
3629 || (h
->root
.type
!= bfd_link_hash_defined
3630 && h
->root
.type
!= bfd_link_hash_defweak
)
3631 || htab
->srelbss
== NULL
)
3634 rela
.r_offset
= (h
->root
.u
.def
.value
3635 + h
->root
.u
.def
.section
->output_section
->vma
3636 + h
->root
.u
.def
.section
->output_offset
);
3637 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_COPY
);
3639 loc
= htab
->srelbss
->contents
;
3640 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3641 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3644 /* Mark some specially defined symbols as absolute. */
3645 if (h
== htab
->elf
.hdynamic
3646 || h
== htab
->elf
.hgot
3647 || h
== htab
->elf
.hplt
)
3648 sym
->st_shndx
= SHN_ABS
;
3653 /* Used to decide how to sort relocs in an optimal manner for the
3654 dynamic linker, before writing them out. */
3656 static enum elf_reloc_type_class
3657 elf_s390_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3658 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3659 const Elf_Internal_Rela
*rela
)
3661 bfd
*abfd
= info
->output_bfd
;
3662 const struct elf_backend_data
*bed
= get_elf_backend_data (abfd
);
3663 struct elf_s390_link_hash_table
*htab
= elf_s390_hash_table (info
);
3664 unsigned long r_symndx
= ELF64_R_SYM (rela
->r_info
);
3665 Elf_Internal_Sym sym
;
3667 if (htab
->elf
.dynsym
== NULL
3668 || !bed
->s
->swap_symbol_in (abfd
,
3669 (htab
->elf
.dynsym
->contents
3670 + r_symndx
* bed
->s
->sizeof_sym
),
3674 /* Check relocation against STT_GNU_IFUNC symbol. */
3675 if (ELF_ST_TYPE (sym
.st_info
) == STT_GNU_IFUNC
)
3676 return reloc_class_ifunc
;
3678 switch ((int) ELF64_R_TYPE (rela
->r_info
))
3680 case R_390_RELATIVE
:
3681 return reloc_class_relative
;
3682 case R_390_JMP_SLOT
:
3683 return reloc_class_plt
;
3685 return reloc_class_copy
;
3687 return reloc_class_normal
;
3691 /* Finish up the dynamic sections. */
3694 elf_s390_finish_dynamic_sections (bfd
*output_bfd
,
3695 struct bfd_link_info
*info
)
3697 struct elf_s390_link_hash_table
*htab
;
3703 htab
= elf_s390_hash_table (info
);
3707 dynobj
= htab
->elf
.dynobj
;
3708 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3710 if (htab
->elf
.dynamic_sections_created
)
3712 Elf64_External_Dyn
*dyncon
, *dynconend
;
3714 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
3717 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
3718 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3719 for (; dyncon
< dynconend
; dyncon
++)
3721 Elf_Internal_Dyn dyn
;
3724 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3732 dyn
.d_un
.d_ptr
= htab
->elf
.sgot
->output_section
->vma
;
3736 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
3740 s
= htab
->elf
.srelplt
->output_section
;
3741 dyn
.d_un
.d_val
= s
->size
;
3745 /* The procedure linkage table relocs (DT_JMPREL) should
3746 not be included in the overall relocs (DT_RELA).
3747 Therefore, we override the DT_RELASZ entry here to
3748 make it not include the JMPREL relocs. Since the
3749 linker script arranges for .rela.plt to follow all
3750 other relocation sections, we don't have to worry
3751 about changing the DT_RELA entry. */
3752 s
= htab
->elf
.srelplt
->output_section
;
3753 dyn
.d_un
.d_val
-= s
->size
;
3757 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3760 /* Fill in the special first entry in the procedure linkage table. */
3761 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
3763 /* fill in blueprint for plt 0 entry */
3764 memcpy (htab
->elf
.splt
->contents
, elf_s390x_first_plt_entry
,
3765 PLT_FIRST_ENTRY_SIZE
);
3766 /* Fixup relative address to start of GOT */
3767 bfd_put_32 (output_bfd
,
3768 (htab
->elf
.sgotplt
->output_section
->vma
+
3769 htab
->elf
.sgotplt
->output_offset
3770 - htab
->elf
.splt
->output_section
->vma
- 6)/2,
3771 htab
->elf
.splt
->contents
+ 8);
3773 if (elf_section_data (htab
->elf
.splt
->output_section
) != NULL
)
3774 elf_section_data (htab
->elf
.splt
->output_section
)->this_hdr
.sh_entsize
3778 if (htab
->elf
.sgotplt
)
3780 /* Fill in the first three entries in the global offset table. */
3781 if (htab
->elf
.sgotplt
->size
> 0)
3783 bfd_put_64 (output_bfd
,
3784 (sdyn
== NULL
? (bfd_vma
) 0
3785 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3786 htab
->elf
.sgotplt
->contents
);
3787 /* One entry for shared object struct ptr. */
3788 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ 8);
3789 /* One entry for _dl_runtime_resolve. */
3790 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ 12);
3793 elf_section_data (htab
->elf
.sgot
->output_section
)
3794 ->this_hdr
.sh_entsize
= 8;
3797 /* Finish dynamic symbol for local IFUNC symbols. */
3798 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link
.next
)
3800 struct plt_entry
*local_plt
;
3801 Elf_Internal_Sym
*isym
;
3802 Elf_Internal_Shdr
*symtab_hdr
;
3804 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3806 local_plt
= elf_s390_local_plt (ibfd
);
3807 if (local_plt
!= NULL
)
3808 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
3810 if (local_plt
[i
].plt
.offset
!= (bfd_vma
) -1)
3812 asection
*sec
= local_plt
[i
].sec
;
3813 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, i
);
3817 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3818 elf_s390_finish_ifunc_symbol (output_bfd
, info
, NULL
, htab
,
3819 local_plt
[i
].plt
.offset
,
3821 + sec
->output_section
->vma
3822 + sec
->output_offset
);
3831 /* Return address for Ith PLT stub in section PLT, for relocation REL
3832 or (bfd_vma) -1 if it should not be included. */
3835 elf_s390_plt_sym_val (bfd_vma i
, const asection
*plt
,
3836 const arelent
*rel ATTRIBUTE_UNUSED
)
3838 return plt
->vma
+ PLT_FIRST_ENTRY_SIZE
+ i
* PLT_ENTRY_SIZE
;
3841 /* Merge backend specific data from an object file to the output
3842 object file when linking. */
3845 elf64_s390_merge_private_bfd_data (bfd
*ibfd
, bfd
*obfd
)
3847 if (!is_s390_elf (ibfd
) || !is_s390_elf (obfd
))
3850 if (!elf_s390_merge_obj_attributes (ibfd
, obfd
))
3856 /* Why was the hash table entry size definition changed from
3857 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3858 this is the only reason for the s390_elf64_size_info structure. */
3860 const struct elf_size_info s390_elf64_size_info
=
3862 sizeof (Elf64_External_Ehdr
),
3863 sizeof (Elf64_External_Phdr
),
3864 sizeof (Elf64_External_Shdr
),
3865 sizeof (Elf64_External_Rel
),
3866 sizeof (Elf64_External_Rela
),
3867 sizeof (Elf64_External_Sym
),
3868 sizeof (Elf64_External_Dyn
),
3869 sizeof (Elf_External_Note
),
3870 8, /* hash-table entry size. */
3871 1, /* internal relocations per external relocations. */
3872 64, /* arch_size. */
3873 3, /* log_file_align. */
3874 ELFCLASS64
, EV_CURRENT
,
3875 bfd_elf64_write_out_phdrs
,
3876 bfd_elf64_write_shdrs_and_ehdr
,
3877 bfd_elf64_checksum_contents
,
3878 bfd_elf64_write_relocs
,
3879 bfd_elf64_swap_symbol_in
,
3880 bfd_elf64_swap_symbol_out
,
3881 bfd_elf64_slurp_reloc_table
,
3882 bfd_elf64_slurp_symbol_table
,
3883 bfd_elf64_swap_dyn_in
,
3884 bfd_elf64_swap_dyn_out
,
3885 bfd_elf64_swap_reloc_in
,
3886 bfd_elf64_swap_reloc_out
,
3887 bfd_elf64_swap_reloca_in
,
3888 bfd_elf64_swap_reloca_out
3891 #define TARGET_BIG_SYM s390_elf64_vec
3892 #define TARGET_BIG_NAME "elf64-s390"
3893 #define ELF_ARCH bfd_arch_s390
3894 #define ELF_TARGET_ID S390_ELF_DATA
3895 #define ELF_MACHINE_CODE EM_S390
3896 #define ELF_MACHINE_ALT1 EM_S390_OLD
3897 #define ELF_MAXPAGESIZE 0x1000
3899 #define elf_backend_size_info s390_elf64_size_info
3901 #define elf_backend_can_gc_sections 1
3902 #define elf_backend_can_refcount 1
3903 #define elf_backend_want_got_plt 1
3904 #define elf_backend_plt_readonly 1
3905 #define elf_backend_want_plt_sym 0
3906 #define elf_backend_got_header_size 24
3907 #define elf_backend_rela_normal 1
3909 #define elf_info_to_howto elf_s390_info_to_howto
3911 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3912 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3913 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3914 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3915 #define bfd_elf64_bfd_merge_private_bfd_data elf64_s390_merge_private_bfd_data
3917 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3918 #define elf_backend_check_relocs elf_s390_check_relocs
3919 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3920 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3921 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3922 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3923 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3924 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3925 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3926 #define elf_backend_relocate_section elf_s390_relocate_section
3927 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3928 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3929 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3930 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3931 #define elf_backend_sort_relocs_p elf_s390_elf_sort_relocs_p
3933 #define bfd_elf64_mkobject elf_s390_mkobject
3934 #define elf_backend_object_p elf_s390_object_p
3936 /* Enable ELF64 archive functions. */
3937 #define bfd_elf64_archive_functions
3938 extern bfd_boolean
bfd_elf64_archive_slurp_armap (bfd
*);
3939 extern bfd_boolean
bfd_elf64_archive_write_armap (bfd
*, unsigned int, struct orl
*, unsigned int, int);
3941 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3942 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3943 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3944 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3945 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3946 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3947 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3948 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3949 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3951 #include "elf64-target.h"