1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
3 2010, 2011, 2012 Free Software Foundation, Inc.
4 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
6 This file is part of BFD, the Binary File Descriptor library.
8 This program is free software; you can redistribute it and/or modify
9 it under the terms of the GNU General Public License as published by
10 the Free Software Foundation; either version 3 of the License, or
11 (at your option) any later version.
13 This program is distributed in the hope that it will be useful,
14 but WITHOUT ANY WARRANTY; without even the implied warranty of
15 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
16 GNU General Public License for more details.
18 You should have received a copy of the GNU General Public License
19 along with this program; if not, write to the Free Software
20 Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA
30 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
31 from smaller values. Start with zero, widen, *then* decrement. */
32 #define MINUS_ONE (((bfd_vma)0) - 1)
34 static bfd_reloc_status_type
35 s390_tls_reloc (bfd
*, arelent
*, asymbol
*, void *,
36 asection
*, bfd
*, char **);
37 static bfd_reloc_status_type
38 s390_elf_ldisp_reloc (bfd
*, arelent
*, asymbol
*, void *,
39 asection
*, bfd
*, char **);
41 /* The relocation "howto" table. */
42 static reloc_howto_type elf_howto_table
[] =
44 HOWTO (R_390_NONE
, /* type */
46 0, /* size (0 = byte, 1 = 2 byte, 2 = 4 byte) */
48 FALSE
, /* pc_relative */
50 complain_overflow_dont
, /* complain_on_overflow */
51 bfd_elf_generic_reloc
, /* special_function */
52 "R_390_NONE", /* name */
53 FALSE
, /* partial_inplace */
56 FALSE
), /* pcrel_offset */
58 HOWTO(R_390_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
59 bfd_elf_generic_reloc
, "R_390_8", FALSE
, 0,0x000000ff, FALSE
),
60 HOWTO(R_390_12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
61 bfd_elf_generic_reloc
, "R_390_12", FALSE
, 0,0x00000fff, FALSE
),
62 HOWTO(R_390_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
63 bfd_elf_generic_reloc
, "R_390_16", FALSE
, 0,0x0000ffff, FALSE
),
64 HOWTO(R_390_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
65 bfd_elf_generic_reloc
, "R_390_32", FALSE
, 0,0xffffffff, FALSE
),
66 HOWTO(R_390_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
67 bfd_elf_generic_reloc
, "R_390_PC32", FALSE
, 0,0xffffffff, TRUE
),
68 HOWTO(R_390_GOT12
, 0, 1, 12, FALSE
, 0, complain_overflow_bitfield
,
69 bfd_elf_generic_reloc
, "R_390_GOT12", FALSE
, 0,0x00000fff, FALSE
),
70 HOWTO(R_390_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
71 bfd_elf_generic_reloc
, "R_390_GOT32", FALSE
, 0,0xffffffff, FALSE
),
72 HOWTO(R_390_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
73 bfd_elf_generic_reloc
, "R_390_PLT32", FALSE
, 0,0xffffffff, TRUE
),
74 HOWTO(R_390_COPY
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
75 bfd_elf_generic_reloc
, "R_390_COPY", FALSE
, 0,MINUS_ONE
, FALSE
),
76 HOWTO(R_390_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
77 bfd_elf_generic_reloc
, "R_390_GLOB_DAT", FALSE
, 0,MINUS_ONE
, FALSE
),
78 HOWTO(R_390_JMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
79 bfd_elf_generic_reloc
, "R_390_JMP_SLOT", FALSE
, 0,MINUS_ONE
, FALSE
),
80 HOWTO(R_390_RELATIVE
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
81 bfd_elf_generic_reloc
, "R_390_RELATIVE", FALSE
, 0,MINUS_ONE
, FALSE
),
82 HOWTO(R_390_GOTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
83 bfd_elf_generic_reloc
, "R_390_GOTOFF32", FALSE
, 0,MINUS_ONE
, FALSE
),
84 HOWTO(R_390_GOTPC
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
85 bfd_elf_generic_reloc
, "R_390_GOTPC", FALSE
, 0,MINUS_ONE
, TRUE
),
86 HOWTO(R_390_GOT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
87 bfd_elf_generic_reloc
, "R_390_GOT16", FALSE
, 0,0x0000ffff, FALSE
),
88 HOWTO(R_390_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
89 bfd_elf_generic_reloc
, "R_390_PC16", FALSE
, 0,0x0000ffff, TRUE
),
90 HOWTO(R_390_PC16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
91 bfd_elf_generic_reloc
, "R_390_PC16DBL", FALSE
, 0,0x0000ffff, TRUE
),
92 HOWTO(R_390_PLT16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
93 bfd_elf_generic_reloc
, "R_390_PLT16DBL", FALSE
, 0,0x0000ffff, TRUE
),
94 HOWTO(R_390_PC32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
95 bfd_elf_generic_reloc
, "R_390_PC32DBL", FALSE
, 0,0xffffffff, TRUE
),
96 HOWTO(R_390_PLT32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
97 bfd_elf_generic_reloc
, "R_390_PLT32DBL", FALSE
, 0,0xffffffff, TRUE
),
98 HOWTO(R_390_GOTPCDBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
99 bfd_elf_generic_reloc
, "R_390_GOTPCDBL", FALSE
, 0,MINUS_ONE
, TRUE
),
100 HOWTO(R_390_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
101 bfd_elf_generic_reloc
, "R_390_64", FALSE
, 0,MINUS_ONE
, FALSE
),
102 HOWTO(R_390_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
103 bfd_elf_generic_reloc
, "R_390_PC64", FALSE
, 0,MINUS_ONE
, TRUE
),
104 HOWTO(R_390_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
105 bfd_elf_generic_reloc
, "R_390_GOT64", FALSE
, 0,MINUS_ONE
, FALSE
),
106 HOWTO(R_390_PLT64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
107 bfd_elf_generic_reloc
, "R_390_PLT64", FALSE
, 0,MINUS_ONE
, TRUE
),
108 HOWTO(R_390_GOTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
109 bfd_elf_generic_reloc
, "R_390_GOTENT", FALSE
, 0,MINUS_ONE
, TRUE
),
110 HOWTO(R_390_GOTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
111 bfd_elf_generic_reloc
, "R_390_GOTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
112 HOWTO(R_390_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
113 bfd_elf_generic_reloc
, "R_390_GOTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
114 HOWTO(R_390_GOTPLT12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
115 bfd_elf_generic_reloc
, "R_390_GOTPLT12", FALSE
, 0,0x00000fff, FALSE
),
116 HOWTO(R_390_GOTPLT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
117 bfd_elf_generic_reloc
, "R_390_GOTPLT16", FALSE
, 0,0x0000ffff, FALSE
),
118 HOWTO(R_390_GOTPLT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
119 bfd_elf_generic_reloc
, "R_390_GOTPLT32", FALSE
, 0,0xffffffff, FALSE
),
120 HOWTO(R_390_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
121 bfd_elf_generic_reloc
, "R_390_GOTPLT64", FALSE
, 0,MINUS_ONE
, FALSE
),
122 HOWTO(R_390_GOTPLTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
123 bfd_elf_generic_reloc
, "R_390_GOTPLTENT",FALSE
, 0,MINUS_ONE
, TRUE
),
124 HOWTO(R_390_PLTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
125 bfd_elf_generic_reloc
, "R_390_PLTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
126 HOWTO(R_390_PLTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
127 bfd_elf_generic_reloc
, "R_390_PLTOFF32", FALSE
, 0,0xffffffff, FALSE
),
128 HOWTO(R_390_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
129 bfd_elf_generic_reloc
, "R_390_PLTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
130 HOWTO(R_390_TLS_LOAD
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
131 s390_tls_reloc
, "R_390_TLS_LOAD", FALSE
, 0, 0, FALSE
),
132 HOWTO(R_390_TLS_GDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
133 s390_tls_reloc
, "R_390_TLS_GDCALL", FALSE
, 0, 0, FALSE
),
134 HOWTO(R_390_TLS_LDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
135 s390_tls_reloc
, "R_390_TLS_LDCALL", FALSE
, 0, 0, FALSE
),
136 EMPTY_HOWTO (R_390_TLS_GD32
), /* Empty entry for R_390_TLS_GD32. */
137 HOWTO(R_390_TLS_GD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
138 bfd_elf_generic_reloc
, "R_390_TLS_GD64", FALSE
, 0, MINUS_ONE
, FALSE
),
139 HOWTO(R_390_TLS_GOTIE12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
140 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE12", FALSE
, 0, 0x00000fff, FALSE
),
141 EMPTY_HOWTO (R_390_TLS_GOTIE32
), /* Empty entry for R_390_TLS_GOTIE32. */
142 HOWTO(R_390_TLS_GOTIE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
143 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE64", FALSE
, 0, MINUS_ONE
, FALSE
),
144 EMPTY_HOWTO (R_390_TLS_LDM32
), /* Empty entry for R_390_TLS_LDM32. */
145 HOWTO(R_390_TLS_LDM64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
146 bfd_elf_generic_reloc
, "R_390_TLS_LDM64", FALSE
, 0, MINUS_ONE
, FALSE
),
147 EMPTY_HOWTO (R_390_TLS_IE32
), /* Empty entry for R_390_TLS_IE32. */
148 HOWTO(R_390_TLS_IE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
149 bfd_elf_generic_reloc
, "R_390_TLS_IE64", FALSE
, 0, MINUS_ONE
, FALSE
),
150 HOWTO(R_390_TLS_IEENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
151 bfd_elf_generic_reloc
, "R_390_TLS_IEENT", FALSE
, 0, MINUS_ONE
, TRUE
),
152 EMPTY_HOWTO (R_390_TLS_LE32
), /* Empty entry for R_390_TLS_LE32. */
153 HOWTO(R_390_TLS_LE64
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
154 bfd_elf_generic_reloc
, "R_390_TLS_LE64", FALSE
, 0, MINUS_ONE
, FALSE
),
155 EMPTY_HOWTO (R_390_TLS_LDO32
), /* Empty entry for R_390_TLS_LDO32. */
156 HOWTO(R_390_TLS_LDO64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
157 bfd_elf_generic_reloc
, "R_390_TLS_LDO64", FALSE
, 0, MINUS_ONE
, FALSE
),
158 HOWTO(R_390_TLS_DTPMOD
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
159 bfd_elf_generic_reloc
, "R_390_TLS_DTPMOD", FALSE
, 0, MINUS_ONE
, FALSE
),
160 HOWTO(R_390_TLS_DTPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
161 bfd_elf_generic_reloc
, "R_390_TLS_DTPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
162 HOWTO(R_390_TLS_TPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
163 bfd_elf_generic_reloc
, "R_390_TLS_TPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
164 HOWTO(R_390_20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
165 s390_elf_ldisp_reloc
, "R_390_20", FALSE
, 0,0x0fffff00, FALSE
),
166 HOWTO(R_390_GOT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
167 s390_elf_ldisp_reloc
, "R_390_GOT20", FALSE
, 0,0x0fffff00, FALSE
),
168 HOWTO(R_390_GOTPLT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
169 s390_elf_ldisp_reloc
, "R_390_GOTPLT20", FALSE
, 0,0x0fffff00, FALSE
),
170 HOWTO(R_390_TLS_GOTIE20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
171 s390_elf_ldisp_reloc
, "R_390_TLS_GOTIE20", FALSE
, 0,0x0fffff00, FALSE
),
172 HOWTO(R_390_IRELATIVE
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
173 bfd_elf_generic_reloc
, "R_390_IRELATIVE", FALSE
, 0, MINUS_ONE
, FALSE
),
174 HOWTO(R_390_PC12DBL
, 1, 1, 12, TRUE
, 0, complain_overflow_bitfield
,
175 bfd_elf_generic_reloc
, "R_390_PC12DBL", FALSE
, 0,0x00000fff, TRUE
),
176 HOWTO(R_390_PLT12DBL
, 1, 1, 12, TRUE
, 0, complain_overflow_bitfield
,
177 bfd_elf_generic_reloc
, "R_390_PLT12DBL", FALSE
, 0,0x00000fff, TRUE
),
178 HOWTO(R_390_PC24DBL
, 1, 2, 24, TRUE
, 0, complain_overflow_bitfield
,
179 bfd_elf_generic_reloc
, "R_390_PC24DBL", FALSE
, 0,0x00ffffff, TRUE
),
180 HOWTO(R_390_PLT24DBL
, 1, 2, 24, TRUE
, 0, complain_overflow_bitfield
,
181 bfd_elf_generic_reloc
, "R_390_PLT24DBL", FALSE
, 0,0x00ffffff, TRUE
),
184 /* GNU extension to record C++ vtable hierarchy. */
185 static reloc_howto_type elf64_s390_vtinherit_howto
=
186 HOWTO (R_390_GNU_VTINHERIT
, 0,4,0,FALSE
,0,complain_overflow_dont
, NULL
, "R_390_GNU_VTINHERIT", FALSE
,0, 0, FALSE
);
187 static reloc_howto_type elf64_s390_vtentry_howto
=
188 HOWTO (R_390_GNU_VTENTRY
, 0,4,0,FALSE
,0,complain_overflow_dont
, _bfd_elf_rel_vtable_reloc_fn
,"R_390_GNU_VTENTRY", FALSE
,0,0, FALSE
);
190 static reloc_howto_type
*
191 elf_s390_reloc_type_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
192 bfd_reloc_code_real_type code
)
197 return &elf_howto_table
[(int) R_390_NONE
];
199 return &elf_howto_table
[(int) R_390_8
];
200 case BFD_RELOC_390_12
:
201 return &elf_howto_table
[(int) R_390_12
];
203 return &elf_howto_table
[(int) R_390_16
];
205 return &elf_howto_table
[(int) R_390_32
];
207 return &elf_howto_table
[(int) R_390_32
];
208 case BFD_RELOC_32_PCREL
:
209 return &elf_howto_table
[(int) R_390_PC32
];
210 case BFD_RELOC_390_GOT12
:
211 return &elf_howto_table
[(int) R_390_GOT12
];
212 case BFD_RELOC_32_GOT_PCREL
:
213 return &elf_howto_table
[(int) R_390_GOT32
];
214 case BFD_RELOC_390_PLT32
:
215 return &elf_howto_table
[(int) R_390_PLT32
];
216 case BFD_RELOC_390_COPY
:
217 return &elf_howto_table
[(int) R_390_COPY
];
218 case BFD_RELOC_390_GLOB_DAT
:
219 return &elf_howto_table
[(int) R_390_GLOB_DAT
];
220 case BFD_RELOC_390_JMP_SLOT
:
221 return &elf_howto_table
[(int) R_390_JMP_SLOT
];
222 case BFD_RELOC_390_RELATIVE
:
223 return &elf_howto_table
[(int) R_390_RELATIVE
];
224 case BFD_RELOC_32_GOTOFF
:
225 return &elf_howto_table
[(int) R_390_GOTOFF32
];
226 case BFD_RELOC_390_GOTPC
:
227 return &elf_howto_table
[(int) R_390_GOTPC
];
228 case BFD_RELOC_390_GOT16
:
229 return &elf_howto_table
[(int) R_390_GOT16
];
230 case BFD_RELOC_16_PCREL
:
231 return &elf_howto_table
[(int) R_390_PC16
];
232 case BFD_RELOC_390_PC12DBL
:
233 return &elf_howto_table
[(int) R_390_PC12DBL
];
234 case BFD_RELOC_390_PLT12DBL
:
235 return &elf_howto_table
[(int) R_390_PLT12DBL
];
236 case BFD_RELOC_390_PC16DBL
:
237 return &elf_howto_table
[(int) R_390_PC16DBL
];
238 case BFD_RELOC_390_PLT16DBL
:
239 return &elf_howto_table
[(int) R_390_PLT16DBL
];
240 case BFD_RELOC_390_PC24DBL
:
241 return &elf_howto_table
[(int) R_390_PC24DBL
];
242 case BFD_RELOC_390_PLT24DBL
:
243 return &elf_howto_table
[(int) R_390_PLT24DBL
];
244 case BFD_RELOC_390_PC32DBL
:
245 return &elf_howto_table
[(int) R_390_PC32DBL
];
246 case BFD_RELOC_390_PLT32DBL
:
247 return &elf_howto_table
[(int) R_390_PLT32DBL
];
248 case BFD_RELOC_390_GOTPCDBL
:
249 return &elf_howto_table
[(int) R_390_GOTPCDBL
];
251 return &elf_howto_table
[(int) R_390_64
];
252 case BFD_RELOC_64_PCREL
:
253 return &elf_howto_table
[(int) R_390_PC64
];
254 case BFD_RELOC_390_GOT64
:
255 return &elf_howto_table
[(int) R_390_GOT64
];
256 case BFD_RELOC_390_PLT64
:
257 return &elf_howto_table
[(int) R_390_PLT64
];
258 case BFD_RELOC_390_GOTENT
:
259 return &elf_howto_table
[(int) R_390_GOTENT
];
260 case BFD_RELOC_16_GOTOFF
:
261 return &elf_howto_table
[(int) R_390_GOTOFF16
];
262 case BFD_RELOC_390_GOTOFF64
:
263 return &elf_howto_table
[(int) R_390_GOTOFF64
];
264 case BFD_RELOC_390_GOTPLT12
:
265 return &elf_howto_table
[(int) R_390_GOTPLT12
];
266 case BFD_RELOC_390_GOTPLT16
:
267 return &elf_howto_table
[(int) R_390_GOTPLT16
];
268 case BFD_RELOC_390_GOTPLT32
:
269 return &elf_howto_table
[(int) R_390_GOTPLT32
];
270 case BFD_RELOC_390_GOTPLT64
:
271 return &elf_howto_table
[(int) R_390_GOTPLT64
];
272 case BFD_RELOC_390_GOTPLTENT
:
273 return &elf_howto_table
[(int) R_390_GOTPLTENT
];
274 case BFD_RELOC_390_PLTOFF16
:
275 return &elf_howto_table
[(int) R_390_PLTOFF16
];
276 case BFD_RELOC_390_PLTOFF32
:
277 return &elf_howto_table
[(int) R_390_PLTOFF32
];
278 case BFD_RELOC_390_PLTOFF64
:
279 return &elf_howto_table
[(int) R_390_PLTOFF64
];
280 case BFD_RELOC_390_TLS_LOAD
:
281 return &elf_howto_table
[(int) R_390_TLS_LOAD
];
282 case BFD_RELOC_390_TLS_GDCALL
:
283 return &elf_howto_table
[(int) R_390_TLS_GDCALL
];
284 case BFD_RELOC_390_TLS_LDCALL
:
285 return &elf_howto_table
[(int) R_390_TLS_LDCALL
];
286 case BFD_RELOC_390_TLS_GD64
:
287 return &elf_howto_table
[(int) R_390_TLS_GD64
];
288 case BFD_RELOC_390_TLS_GOTIE12
:
289 return &elf_howto_table
[(int) R_390_TLS_GOTIE12
];
290 case BFD_RELOC_390_TLS_GOTIE64
:
291 return &elf_howto_table
[(int) R_390_TLS_GOTIE64
];
292 case BFD_RELOC_390_TLS_LDM64
:
293 return &elf_howto_table
[(int) R_390_TLS_LDM64
];
294 case BFD_RELOC_390_TLS_IE64
:
295 return &elf_howto_table
[(int) R_390_TLS_IE64
];
296 case BFD_RELOC_390_TLS_IEENT
:
297 return &elf_howto_table
[(int) R_390_TLS_IEENT
];
298 case BFD_RELOC_390_TLS_LE64
:
299 return &elf_howto_table
[(int) R_390_TLS_LE64
];
300 case BFD_RELOC_390_TLS_LDO64
:
301 return &elf_howto_table
[(int) R_390_TLS_LDO64
];
302 case BFD_RELOC_390_TLS_DTPMOD
:
303 return &elf_howto_table
[(int) R_390_TLS_DTPMOD
];
304 case BFD_RELOC_390_TLS_DTPOFF
:
305 return &elf_howto_table
[(int) R_390_TLS_DTPOFF
];
306 case BFD_RELOC_390_TLS_TPOFF
:
307 return &elf_howto_table
[(int) R_390_TLS_TPOFF
];
308 case BFD_RELOC_390_20
:
309 return &elf_howto_table
[(int) R_390_20
];
310 case BFD_RELOC_390_GOT20
:
311 return &elf_howto_table
[(int) R_390_GOT20
];
312 case BFD_RELOC_390_GOTPLT20
:
313 return &elf_howto_table
[(int) R_390_GOTPLT20
];
314 case BFD_RELOC_390_TLS_GOTIE20
:
315 return &elf_howto_table
[(int) R_390_TLS_GOTIE20
];
316 case BFD_RELOC_390_IRELATIVE
:
317 return &elf_howto_table
[(int) R_390_IRELATIVE
];
318 case BFD_RELOC_VTABLE_INHERIT
:
319 return &elf64_s390_vtinherit_howto
;
320 case BFD_RELOC_VTABLE_ENTRY
:
321 return &elf64_s390_vtentry_howto
;
328 static reloc_howto_type
*
329 elf_s390_reloc_name_lookup (bfd
*abfd ATTRIBUTE_UNUSED
,
335 i
< sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]);
337 if (elf_howto_table
[i
].name
!= NULL
338 && strcasecmp (elf_howto_table
[i
].name
, r_name
) == 0)
339 return &elf_howto_table
[i
];
341 if (strcasecmp (elf64_s390_vtinherit_howto
.name
, r_name
) == 0)
342 return &elf64_s390_vtinherit_howto
;
343 if (strcasecmp (elf64_s390_vtentry_howto
.name
, r_name
) == 0)
344 return &elf64_s390_vtentry_howto
;
349 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
350 and elf64-s390.c has its own copy. */
353 elf_s390_info_to_howto (bfd
*abfd ATTRIBUTE_UNUSED
,
355 Elf_Internal_Rela
*dst
)
357 unsigned int r_type
= ELF64_R_TYPE(dst
->r_info
);
360 case R_390_GNU_VTINHERIT
:
361 cache_ptr
->howto
= &elf64_s390_vtinherit_howto
;
364 case R_390_GNU_VTENTRY
:
365 cache_ptr
->howto
= &elf64_s390_vtentry_howto
;
369 if (r_type
>= sizeof (elf_howto_table
) / sizeof (elf_howto_table
[0]))
371 (*_bfd_error_handler
) (_("%B: invalid relocation type %d"),
375 cache_ptr
->howto
= &elf_howto_table
[r_type
];
379 /* A relocation function which doesn't do anything. */
380 static bfd_reloc_status_type
381 s390_tls_reloc (bfd
*abfd ATTRIBUTE_UNUSED
,
382 arelent
*reloc_entry
,
383 asymbol
*symbol ATTRIBUTE_UNUSED
,
384 void * data ATTRIBUTE_UNUSED
,
385 asection
*input_section
,
387 char **error_message ATTRIBUTE_UNUSED
)
390 reloc_entry
->address
+= input_section
->output_offset
;
394 /* Handle the large displacement relocs. */
395 static bfd_reloc_status_type
396 s390_elf_ldisp_reloc (bfd
*abfd
,
397 arelent
*reloc_entry
,
400 asection
*input_section
,
402 char **error_message ATTRIBUTE_UNUSED
)
404 reloc_howto_type
*howto
= reloc_entry
->howto
;
408 if (output_bfd
!= (bfd
*) NULL
409 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
410 && (! howto
->partial_inplace
411 || reloc_entry
->addend
== 0))
413 reloc_entry
->address
+= input_section
->output_offset
;
416 if (output_bfd
!= NULL
)
417 return bfd_reloc_continue
;
419 if (reloc_entry
->address
> bfd_get_section_limit (abfd
, input_section
))
420 return bfd_reloc_outofrange
;
422 relocation
= (symbol
->value
423 + symbol
->section
->output_section
->vma
424 + symbol
->section
->output_offset
);
425 relocation
+= reloc_entry
->addend
;
426 if (howto
->pc_relative
)
428 relocation
-= (input_section
->output_section
->vma
429 + input_section
->output_offset
);
430 relocation
-= reloc_entry
->address
;
433 insn
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ reloc_entry
->address
);
434 insn
|= (relocation
& 0xfff) << 16 | (relocation
& 0xff000) >> 4;
435 bfd_put_32 (abfd
, insn
, (bfd_byte
*) data
+ reloc_entry
->address
);
437 if ((bfd_signed_vma
) relocation
< - 0x80000
438 || (bfd_signed_vma
) relocation
> 0x7ffff)
439 return bfd_reloc_overflow
;
445 elf_s390_is_local_label_name (bfd
*abfd
, const char *name
)
447 if (name
[0] == '.' && (name
[1] == 'X' || name
[1] == 'L'))
450 return _bfd_elf_is_local_label_name (abfd
, name
);
453 /* Functions for the 390 ELF linker. */
455 /* The name of the dynamic interpreter. This is put in the .interp
458 #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1"
460 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
461 copying dynamic variables from a shared lib into an app's dynbss
462 section, and instead use a dynamic relocation to point into the
464 #define ELIMINATE_COPY_RELOCS 1
466 /* The size in bytes of the first entry in the procedure linkage table. */
467 #define PLT_FIRST_ENTRY_SIZE 32
468 /* The size in bytes of an entry in the procedure linkage table. */
469 #define PLT_ENTRY_SIZE 32
471 #define GOT_ENTRY_SIZE 8
473 #define RELA_ENTRY_SIZE sizeof (Elf64_External_Rela)
475 /* The first three entries in a procedure linkage table are reserved,
476 and the initial contents are unimportant (we zero them out).
477 Subsequent entries look like this. See the SVR4 ABI 386
478 supplement to see how this works. */
480 /* For the s390, simple addr offset can only be 0 - 4096.
481 To use the full 16777216 TB address space, several instructions
482 are needed to load an address in a register and execute
483 a branch( or just saving the address)
485 Furthermore, only r 0 and 1 are free to use!!! */
487 /* The first 3 words in the GOT are then reserved.
488 Word 0 is the address of the dynamic table.
489 Word 1 is a pointer to a structure describing the object
490 Word 2 is used to point to the loader entry address.
492 The code for PLT entries looks like this:
494 The GOT holds the address in the PLT to be executed.
495 The loader then gets:
496 24(15) = Pointer to the structure describing the object.
497 28(15) = Offset in symbol table
498 The loader must then find the module where the function is
499 and insert the address in the GOT.
501 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
502 LG 1,0(1) # 6 bytes Load address from GOT in r1
503 BCR 15,1 # 2 bytes Jump to address
504 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
505 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
506 BRCL 15,-x # 6 bytes Jump to start of PLT
507 .long ? # 4 bytes offset into .rela.plt
509 Total = 32 bytes per PLT entry
510 Fixup at offset 2: relative address to GOT entry
511 Fixup at offset 22: relative branch to PLT0
512 Fixup at offset 28: 32 bit offset into .rela.plt
514 A 32 bit offset into the symbol table is enough. It allows for
515 .rela.plt sections up to a size of 2 gigabyte. A single dynamic
516 object (the main program, any shared library) is limited to 4GB in
517 size. Having a .rela.plt of 2GB would already make the .plt
518 section bigger than 8GB. */
520 static const bfd_byte elf_s390x_plt_entry
[PLT_ENTRY_SIZE
] =
522 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
523 0xe3, 0x10, 0x10, 0x00, 0x00, 0x04, /* lg %r1,0(%r1) */
524 0x07, 0xf1, /* br %r1 */
525 0x0d, 0x10, /* basr %r1,%r0 */
526 0xe3, 0x10, 0x10, 0x0c, 0x00, 0x14, /* lgf %r1,12(%r1) */
527 0xc0, 0xf4, 0x00, 0x00, 0x00, 0x00, /* jg first plt */
528 0x00, 0x00, 0x00, 0x00 /* .long 0x00000000 */
531 /* The first PLT entry pushes the offset into the symbol table
532 from R1 onto the stack at 56(15) and the loader object info
533 at 48(15), loads the loader address in R1 and jumps to it. */
535 /* The first entry in the PLT:
538 STG 1,56(15) # r1 contains the offset into the symbol table
539 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
540 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
541 LG 1,16(1) # get entry address of loader
542 BCR 15,1 # jump to loader
544 Fixup at offset 8: relative address to start of GOT. */
546 static const bfd_byte elf_s390x_first_plt_entry
[PLT_FIRST_ENTRY_SIZE
] =
548 0xe3, 0x10, 0xf0, 0x38, 0x00, 0x24, /* stg %r1,56(%r15) */
549 0xc0, 0x10, 0x00, 0x00, 0x00, 0x00, /* larl %r1,. */
550 0xd2, 0x07, 0xf0, 0x30, 0x10, 0x08, /* mvc 48(8,%r15),8(%r1) */
551 0xe3, 0x10, 0x10, 0x10, 0x00, 0x04, /* lg %r1,16(%r1) */
552 0x07, 0xf1, /* br %r1 */
553 0x07, 0x00, /* nopr %r0 */
554 0x07, 0x00, /* nopr %r0 */
555 0x07, 0x00 /* nopr %r0 */
559 /* s390 ELF linker hash entry. */
561 struct elf_s390_link_hash_entry
563 struct elf_link_hash_entry elf
;
565 /* Track dynamic relocs copied for this symbol. */
566 struct elf_dyn_relocs
*dyn_relocs
;
568 /* Number of GOTPLT references for a function. */
569 bfd_signed_vma gotplt_refcount
;
571 #define GOT_UNKNOWN 0
575 #define GOT_TLS_IE_NLT 3
576 unsigned char tls_type
;
578 /* For pointer equality reasons we might need to change the symbol
579 type from STT_GNU_IFUNC to STT_FUNC together with its value and
580 section entry. So after alloc_dynrelocs only these values should
581 be used. In order to check whether a symbol is IFUNC use
582 s390_is_ifunc_symbol_p. */
583 bfd_vma ifunc_resolver_address
;
584 asection
*ifunc_resolver_section
;
587 #define elf_s390_hash_entry(ent) \
588 ((struct elf_s390_link_hash_entry *)(ent))
590 /* This structure represents an entry in the local PLT list needed for
591 local IFUNC symbols. */
594 /* The section of the local symbol.
595 Set in relocate_section and used in finish_dynamic_sections. */
600 bfd_signed_vma refcount
;
605 /* NOTE: Keep this structure in sync with
606 the one declared in elf32-s390.c. */
607 struct elf_s390_obj_tdata
609 struct elf_obj_tdata root
;
611 /* A local PLT is needed for ifunc symbols. */
612 struct plt_entry
*local_plt
;
614 /* TLS type for each local got entry. */
615 char *local_got_tls_type
;
618 #define elf_s390_tdata(abfd) \
619 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
621 #define elf_s390_local_plt(abfd) \
622 (elf_s390_tdata (abfd)->local_plt)
624 #define elf_s390_local_got_tls_type(abfd) \
625 (elf_s390_tdata (abfd)->local_got_tls_type)
627 #define is_s390_elf(bfd) \
628 (bfd_get_flavour (bfd) == bfd_target_elf_flavour \
629 && elf_tdata (bfd) != NULL \
630 && elf_object_id (bfd) == S390_ELF_DATA)
633 elf_s390_mkobject (bfd
*abfd
)
635 return bfd_elf_allocate_object (abfd
, sizeof (struct elf_s390_obj_tdata
),
640 elf_s390_object_p (bfd
*abfd
)
642 /* Set the right machine number for an s390 elf32 file. */
643 return bfd_default_set_arch_mach (abfd
, bfd_arch_s390
, bfd_mach_s390_64
);
646 /* s390 ELF linker hash table. */
648 struct elf_s390_link_hash_table
650 struct elf_link_hash_table elf
;
652 /* Short-cuts to get to dynamic linker sections. */
658 bfd_signed_vma refcount
;
662 /* Small local sym cache. */
663 struct sym_cache sym_cache
;
666 /* Get the s390 ELF linker hash table from a link_info structure. */
668 #define elf_s390_hash_table(p) \
669 (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \
670 == S390_ELF_DATA ? ((struct elf_s390_link_hash_table *) ((p)->hash)) : NULL)
673 #include "elf-s390-common.c"
675 /* Create an entry in an s390 ELF linker hash table. */
677 static struct bfd_hash_entry
*
678 link_hash_newfunc (struct bfd_hash_entry
*entry
,
679 struct bfd_hash_table
*table
,
682 /* Allocate the structure if it has not already been allocated by a
686 entry
= bfd_hash_allocate (table
,
687 sizeof (struct elf_s390_link_hash_entry
));
692 /* Call the allocation method of the superclass. */
693 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
696 struct elf_s390_link_hash_entry
*eh
;
698 eh
= (struct elf_s390_link_hash_entry
*) entry
;
699 eh
->dyn_relocs
= NULL
;
700 eh
->gotplt_refcount
= 0;
701 eh
->tls_type
= GOT_UNKNOWN
;
702 eh
->ifunc_resolver_address
= 0;
703 eh
->ifunc_resolver_section
= NULL
;
709 /* Create an s390 ELF linker hash table. */
711 static struct bfd_link_hash_table
*
712 elf_s390_link_hash_table_create (bfd
*abfd
)
714 struct elf_s390_link_hash_table
*ret
;
715 bfd_size_type amt
= sizeof (struct elf_s390_link_hash_table
);
717 ret
= (struct elf_s390_link_hash_table
*) bfd_zmalloc (amt
);
721 if (!_bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
,
722 sizeof (struct elf_s390_link_hash_entry
),
729 return &ret
->elf
.root
;
732 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
733 shortcuts to them in our hash table. */
736 create_got_section (bfd
*dynobj
,
737 struct bfd_link_info
*info
)
739 struct elf_s390_link_hash_table
*htab
;
741 if (! _bfd_elf_create_got_section (dynobj
, info
))
744 htab
= elf_s390_hash_table (info
);
748 htab
->elf
.sgot
= bfd_get_linker_section (dynobj
, ".got");
749 htab
->elf
.sgotplt
= bfd_get_linker_section (dynobj
, ".got.plt");
750 htab
->elf
.srelgot
= bfd_get_linker_section (dynobj
, ".rela.got");
751 if (!htab
->elf
.sgot
|| !htab
->elf
.sgotplt
|| !htab
->elf
.srelgot
)
756 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
757 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
761 elf_s390_create_dynamic_sections (bfd
*dynobj
,
762 struct bfd_link_info
*info
)
764 struct elf_s390_link_hash_table
*htab
;
766 htab
= elf_s390_hash_table (info
);
770 if (!htab
->elf
.sgot
&& !create_got_section (dynobj
, info
))
773 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
776 htab
->elf
.splt
= bfd_get_linker_section (dynobj
, ".plt");
777 htab
->elf
.srelplt
= bfd_get_linker_section (dynobj
, ".rela.plt");
778 htab
->sdynbss
= bfd_get_linker_section (dynobj
, ".dynbss");
780 htab
->srelbss
= bfd_get_linker_section (dynobj
, ".rela.bss");
782 if (!htab
->elf
.splt
|| !htab
->elf
.srelplt
|| !htab
->sdynbss
783 || (!info
->shared
&& !htab
->srelbss
))
789 /* Copy the extra info we tack onto an elf_link_hash_entry. */
792 elf_s390_copy_indirect_symbol (struct bfd_link_info
*info
,
793 struct elf_link_hash_entry
*dir
,
794 struct elf_link_hash_entry
*ind
)
796 struct elf_s390_link_hash_entry
*edir
, *eind
;
798 edir
= (struct elf_s390_link_hash_entry
*) dir
;
799 eind
= (struct elf_s390_link_hash_entry
*) ind
;
801 if (eind
->dyn_relocs
!= NULL
)
803 if (edir
->dyn_relocs
!= NULL
)
805 struct elf_dyn_relocs
**pp
;
806 struct elf_dyn_relocs
*p
;
808 /* Add reloc counts against the indirect sym to the direct sym
809 list. Merge any entries against the same section. */
810 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
812 struct elf_dyn_relocs
*q
;
814 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
815 if (q
->sec
== p
->sec
)
817 q
->pc_count
+= p
->pc_count
;
818 q
->count
+= p
->count
;
825 *pp
= edir
->dyn_relocs
;
828 edir
->dyn_relocs
= eind
->dyn_relocs
;
829 eind
->dyn_relocs
= NULL
;
832 if (ind
->root
.type
== bfd_link_hash_indirect
833 && dir
->got
.refcount
<= 0)
835 edir
->tls_type
= eind
->tls_type
;
836 eind
->tls_type
= GOT_UNKNOWN
;
839 if (ELIMINATE_COPY_RELOCS
840 && ind
->root
.type
!= bfd_link_hash_indirect
841 && dir
->dynamic_adjusted
)
843 /* If called to transfer flags for a weakdef during processing
844 of elf_adjust_dynamic_symbol, don't copy non_got_ref.
845 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
846 dir
->ref_dynamic
|= ind
->ref_dynamic
;
847 dir
->ref_regular
|= ind
->ref_regular
;
848 dir
->ref_regular_nonweak
|= ind
->ref_regular_nonweak
;
849 dir
->needs_plt
|= ind
->needs_plt
;
852 _bfd_elf_link_hash_copy_indirect (info
, dir
, ind
);
856 elf_s390_tls_transition (struct bfd_link_info
*info
,
868 return R_390_TLS_LE64
;
869 return R_390_TLS_IE64
;
870 case R_390_TLS_GOTIE64
:
872 return R_390_TLS_LE64
;
873 return R_390_TLS_GOTIE64
;
874 case R_390_TLS_LDM64
:
875 return R_390_TLS_LE64
;
881 /* Look through the relocs for a section during the first phase, and
882 allocate space in the global offset table or procedure linkage
886 elf_s390_check_relocs (bfd
*abfd
,
887 struct bfd_link_info
*info
,
889 const Elf_Internal_Rela
*relocs
)
891 struct elf_s390_link_hash_table
*htab
;
892 Elf_Internal_Shdr
*symtab_hdr
;
893 struct elf_link_hash_entry
**sym_hashes
;
894 const Elf_Internal_Rela
*rel
;
895 const Elf_Internal_Rela
*rel_end
;
897 bfd_signed_vma
*local_got_refcounts
;
898 int tls_type
, old_tls_type
;
900 if (info
->relocatable
)
903 BFD_ASSERT (is_s390_elf (abfd
));
905 htab
= elf_s390_hash_table (info
);
909 symtab_hdr
= &elf_symtab_hdr (abfd
);
910 sym_hashes
= elf_sym_hashes (abfd
);
911 local_got_refcounts
= elf_local_got_refcounts (abfd
);
915 rel_end
= relocs
+ sec
->reloc_count
;
916 for (rel
= relocs
; rel
< rel_end
; rel
++)
919 unsigned long r_symndx
;
920 struct elf_link_hash_entry
*h
;
921 Elf_Internal_Sym
*isym
;
923 r_symndx
= ELF64_R_SYM (rel
->r_info
);
925 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
927 (*_bfd_error_handler
) (_("%B: bad symbol index: %d"),
933 if (r_symndx
< symtab_hdr
->sh_info
)
935 /* A local symbol. */
936 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
941 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
943 struct plt_entry
*plt
;
945 if (htab
->elf
.dynobj
== NULL
)
946 htab
->elf
.dynobj
= abfd
;
948 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
951 if (local_got_refcounts
== NULL
)
953 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
955 local_got_refcounts
= elf_local_got_refcounts (abfd
);
957 plt
= elf_s390_local_plt (abfd
);
958 plt
[r_symndx
].plt
.refcount
++;
964 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
965 while (h
->root
.type
== bfd_link_hash_indirect
966 || h
->root
.type
== bfd_link_hash_warning
)
967 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
969 /* PR15323, ref flags aren't set for references in the same
971 h
->root
.non_ir_ref
= 1;
974 /* Create got section and local_got_refcounts array if they
976 r_type
= elf_s390_tls_transition (info
,
977 ELF64_R_TYPE (rel
->r_info
),
992 case R_390_GOTPLTENT
:
994 case R_390_TLS_GOTIE12
:
995 case R_390_TLS_GOTIE20
:
996 case R_390_TLS_GOTIE64
:
997 case R_390_TLS_IEENT
:
999 case R_390_TLS_LDM64
:
1001 && local_got_refcounts
== NULL
)
1003 if (!elf_s390_allocate_local_syminfo (abfd
, symtab_hdr
))
1005 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1009 case R_390_GOTOFF16
:
1010 case R_390_GOTOFF32
:
1011 case R_390_GOTOFF64
:
1013 case R_390_GOTPCDBL
:
1014 if (htab
->elf
.sgot
== NULL
)
1016 if (htab
->elf
.dynobj
== NULL
)
1017 htab
->elf
.dynobj
= abfd
;
1018 if (!create_got_section (htab
->elf
.dynobj
, info
))
1025 if (htab
->elf
.dynobj
== NULL
)
1026 htab
->elf
.dynobj
= abfd
;
1027 if (!s390_elf_create_ifunc_sections (htab
->elf
.dynobj
, info
))
1030 /* Make sure an IFUNC symbol defined in a non-shared object
1031 always gets a PLT slot. */
1032 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
1034 /* The symbol is called by the dynamic loader in order
1035 to resolve the relocation. So it is in fact also
1044 case R_390_GOTOFF16
:
1045 case R_390_GOTOFF32
:
1046 case R_390_GOTOFF64
:
1048 case R_390_GOTPCDBL
:
1049 /* These relocs do not need a GOT slot. They just load the
1050 GOT pointer itself or address something else relative to
1051 the GOT. Since the GOT pointer has been set up above we
1055 case R_390_PLT12DBL
:
1056 case R_390_PLT16DBL
:
1057 case R_390_PLT24DBL
:
1059 case R_390_PLT32DBL
:
1061 case R_390_PLTOFF16
:
1062 case R_390_PLTOFF32
:
1063 case R_390_PLTOFF64
:
1064 /* This symbol requires a procedure linkage table entry. We
1065 actually build the entry in adjust_dynamic_symbol,
1066 because this might be a case of linking PIC code which is
1067 never referenced by a dynamic object, in which case we
1068 don't need to generate a procedure linkage table entry
1071 /* If this is a local symbol, we resolve it directly without
1072 creating a procedure linkage table entry. */
1076 h
->plt
.refcount
+= 1;
1080 case R_390_GOTPLT12
:
1081 case R_390_GOTPLT16
:
1082 case R_390_GOTPLT20
:
1083 case R_390_GOTPLT32
:
1084 case R_390_GOTPLT64
:
1085 case R_390_GOTPLTENT
:
1086 /* This symbol requires either a procedure linkage table entry
1087 or an entry in the local got. We actually build the entry
1088 in adjust_dynamic_symbol because whether this is really a
1089 global reference can change and with it the fact if we have
1090 to create a plt entry or a local got entry. To be able to
1091 make a once global symbol a local one we have to keep track
1092 of the number of gotplt references that exist for this
1096 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
++;
1098 h
->plt
.refcount
+= 1;
1101 local_got_refcounts
[r_symndx
] += 1;
1104 case R_390_TLS_LDM64
:
1105 htab
->tls_ldm_got
.refcount
+= 1;
1108 case R_390_TLS_IE64
:
1109 case R_390_TLS_GOTIE12
:
1110 case R_390_TLS_GOTIE20
:
1111 case R_390_TLS_GOTIE64
:
1112 case R_390_TLS_IEENT
:
1114 info
->flags
|= DF_STATIC_TLS
;
1123 case R_390_TLS_GD64
:
1124 /* This symbol requires a global offset table entry. */
1133 tls_type
= GOT_NORMAL
;
1135 case R_390_TLS_GD64
:
1136 tls_type
= GOT_TLS_GD
;
1138 case R_390_TLS_IE64
:
1139 case R_390_TLS_GOTIE64
:
1140 tls_type
= GOT_TLS_IE
;
1142 case R_390_TLS_GOTIE12
:
1143 case R_390_TLS_GOTIE20
:
1144 case R_390_TLS_IEENT
:
1145 tls_type
= GOT_TLS_IE_NLT
;
1151 h
->got
.refcount
+= 1;
1152 old_tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1156 local_got_refcounts
[r_symndx
] += 1;
1157 old_tls_type
= elf_s390_local_got_tls_type (abfd
) [r_symndx
];
1159 /* If a TLS symbol is accessed using IE at least once,
1160 there is no point to use dynamic model for it. */
1161 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
)
1163 if (old_tls_type
== GOT_NORMAL
|| tls_type
== GOT_NORMAL
)
1165 (*_bfd_error_handler
)
1166 (_("%B: `%s' accessed both as normal and thread local symbol"),
1167 abfd
, h
->root
.root
.string
);
1170 if (old_tls_type
> tls_type
)
1171 tls_type
= old_tls_type
;
1174 if (old_tls_type
!= tls_type
)
1177 elf_s390_hash_entry (h
)->tls_type
= tls_type
;
1179 elf_s390_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1182 if (r_type
!= R_390_TLS_IE64
)
1186 case R_390_TLS_LE64
:
1189 info
->flags
|= DF_STATIC_TLS
;
1205 /* If this reloc is in a read-only section, we might
1206 need a copy reloc. We can't check reliably at this
1207 stage whether the section is read-only, as input
1208 sections have not yet been mapped to output sections.
1209 Tentatively set the flag for now, and correct in
1210 adjust_dynamic_symbol. */
1215 /* We may need a .plt entry if the function this reloc
1216 refers to is in a shared lib. */
1217 h
->plt
.refcount
+= 1;
1221 /* If we are creating a shared library, and this is a reloc
1222 against a global symbol, or a non PC relative reloc
1223 against a local symbol, then we need to copy the reloc
1224 into the shared library. However, if we are linking with
1225 -Bsymbolic, we do not need to copy a reloc against a
1226 global symbol which is defined in an object we are
1227 including in the link (i.e., DEF_REGULAR is set). At
1228 this point we have not seen all the input files, so it is
1229 possible that DEF_REGULAR is not set now but will be set
1230 later (it is never cleared). In case of a weak definition,
1231 DEF_REGULAR may be cleared later by a strong definition in
1232 a shared library. We account for that possibility below by
1233 storing information in the relocs_copied field of the hash
1234 table entry. A similar situation occurs when creating
1235 shared libraries and symbol visibility changes render the
1238 If on the other hand, we are creating an executable, we
1239 may need to keep relocations for symbols satisfied by a
1240 dynamic library if we manage to avoid copy relocs for the
1243 && (sec
->flags
& SEC_ALLOC
) != 0
1244 && ((ELF64_R_TYPE (rel
->r_info
) != R_390_PC16
1245 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC12DBL
1246 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC16DBL
1247 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC24DBL
1248 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32
1249 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32DBL
1250 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC64
)
1252 && (! SYMBOLIC_BIND (info
, h
)
1253 || h
->root
.type
== bfd_link_hash_defweak
1254 || !h
->def_regular
))))
1255 || (ELIMINATE_COPY_RELOCS
1257 && (sec
->flags
& SEC_ALLOC
) != 0
1259 && (h
->root
.type
== bfd_link_hash_defweak
1260 || !h
->def_regular
)))
1262 struct elf_dyn_relocs
*p
;
1263 struct elf_dyn_relocs
**head
;
1265 /* We must copy these reloc types into the output file.
1266 Create a reloc section in dynobj and make room for
1270 if (htab
->elf
.dynobj
== NULL
)
1271 htab
->elf
.dynobj
= abfd
;
1273 sreloc
= _bfd_elf_make_dynamic_reloc_section
1274 (sec
, htab
->elf
.dynobj
, 3, abfd
, /*rela?*/ TRUE
);
1280 /* If this is a global symbol, we count the number of
1281 relocations we need for this symbol. */
1284 head
= &((struct elf_s390_link_hash_entry
*) h
)->dyn_relocs
;
1288 /* Track dynamic relocs needed for local syms too.
1289 We really need local syms available to do this
1294 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1299 s
= bfd_section_from_elf_index (abfd
, isym
->st_shndx
);
1303 vpp
= &elf_section_data (s
)->local_dynrel
;
1304 head
= (struct elf_dyn_relocs
**) vpp
;
1308 if (p
== NULL
|| p
->sec
!= sec
)
1310 bfd_size_type amt
= sizeof *p
;
1311 p
= ((struct elf_dyn_relocs
*)
1312 bfd_alloc (htab
->elf
.dynobj
, amt
));
1323 if (ELF64_R_TYPE (rel
->r_info
) == R_390_PC16
1324 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC12DBL
1325 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1326 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1327 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32
1328 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32DBL
1329 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC64
)
1334 /* This relocation describes the C++ object vtable hierarchy.
1335 Reconstruct it for later use during GC. */
1336 case R_390_GNU_VTINHERIT
:
1337 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1341 /* This relocation describes which C++ vtable entries are actually
1342 used. Record for later use during GC. */
1343 case R_390_GNU_VTENTRY
:
1344 BFD_ASSERT (h
!= NULL
);
1346 && !bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1358 /* Return the section that should be marked against GC for a given
1362 elf_s390_gc_mark_hook (asection
*sec
,
1363 struct bfd_link_info
*info
,
1364 Elf_Internal_Rela
*rel
,
1365 struct elf_link_hash_entry
*h
,
1366 Elf_Internal_Sym
*sym
)
1369 switch (ELF64_R_TYPE (rel
->r_info
))
1371 case R_390_GNU_VTINHERIT
:
1372 case R_390_GNU_VTENTRY
:
1376 return _bfd_elf_gc_mark_hook (sec
, info
, rel
, h
, sym
);
1379 /* Update the got entry reference counts for the section being removed. */
1382 elf_s390_gc_sweep_hook (bfd
*abfd
,
1383 struct bfd_link_info
*info
,
1385 const Elf_Internal_Rela
*relocs
)
1387 struct elf_s390_link_hash_table
*htab
;
1388 Elf_Internal_Shdr
*symtab_hdr
;
1389 struct elf_link_hash_entry
**sym_hashes
;
1390 bfd_signed_vma
*local_got_refcounts
;
1391 const Elf_Internal_Rela
*rel
, *relend
;
1393 if (info
->relocatable
)
1396 htab
= elf_s390_hash_table (info
);
1400 elf_section_data (sec
)->local_dynrel
= NULL
;
1402 symtab_hdr
= &elf_symtab_hdr (abfd
);
1403 sym_hashes
= elf_sym_hashes (abfd
);
1404 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1406 relend
= relocs
+ sec
->reloc_count
;
1407 for (rel
= relocs
; rel
< relend
; rel
++)
1409 unsigned long r_symndx
;
1410 unsigned int r_type
;
1411 struct elf_link_hash_entry
*h
= NULL
;
1413 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1414 if (r_symndx
>= symtab_hdr
->sh_info
)
1416 struct elf_s390_link_hash_entry
*eh
;
1417 struct elf_dyn_relocs
**pp
;
1418 struct elf_dyn_relocs
*p
;
1420 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1421 while (h
->root
.type
== bfd_link_hash_indirect
1422 || h
->root
.type
== bfd_link_hash_warning
)
1423 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1424 eh
= (struct elf_s390_link_hash_entry
*) h
;
1426 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1429 /* Everything must go for SEC. */
1436 Elf_Internal_Sym
*isym
;
1438 /* A local symbol. */
1439 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
,
1444 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
1446 struct plt_entry
*plt
= elf_s390_local_plt (abfd
);
1447 if (plt
[r_symndx
].plt
.refcount
> 0)
1448 plt
[r_symndx
].plt
.refcount
--;
1452 r_type
= ELF64_R_TYPE (rel
->r_info
);
1453 r_type
= elf_s390_tls_transition (info
, r_type
, h
!= NULL
);
1456 case R_390_TLS_LDM64
:
1457 if (htab
->tls_ldm_got
.refcount
> 0)
1458 htab
->tls_ldm_got
.refcount
-= 1;
1461 case R_390_TLS_GD64
:
1462 case R_390_TLS_IE64
:
1463 case R_390_TLS_GOTIE12
:
1464 case R_390_TLS_GOTIE20
:
1465 case R_390_TLS_GOTIE64
:
1466 case R_390_TLS_IEENT
:
1472 case R_390_GOTOFF16
:
1473 case R_390_GOTOFF32
:
1474 case R_390_GOTOFF64
:
1476 case R_390_GOTPCDBL
:
1480 if (h
->got
.refcount
> 0)
1481 h
->got
.refcount
-= 1;
1483 else if (local_got_refcounts
!= NULL
)
1485 if (local_got_refcounts
[r_symndx
] > 0)
1486 local_got_refcounts
[r_symndx
] -= 1;
1507 case R_390_PLT12DBL
:
1508 case R_390_PLT16DBL
:
1509 case R_390_PLT24DBL
:
1511 case R_390_PLT32DBL
:
1513 case R_390_PLTOFF16
:
1514 case R_390_PLTOFF32
:
1515 case R_390_PLTOFF64
:
1518 if (h
->plt
.refcount
> 0)
1519 h
->plt
.refcount
-= 1;
1523 case R_390_GOTPLT12
:
1524 case R_390_GOTPLT16
:
1525 case R_390_GOTPLT20
:
1526 case R_390_GOTPLT32
:
1527 case R_390_GOTPLT64
:
1528 case R_390_GOTPLTENT
:
1531 if (h
->plt
.refcount
> 0)
1533 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
--;
1534 h
->plt
.refcount
-= 1;
1537 else if (local_got_refcounts
!= NULL
)
1539 if (local_got_refcounts
[r_symndx
] > 0)
1540 local_got_refcounts
[r_symndx
] -= 1;
1552 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1553 entry but we found we will not create any. Called when we find we will
1554 not have any PLT for this symbol, by for example
1555 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1556 or elf_s390_size_dynamic_sections if no dynamic sections will be
1557 created (we're only linking static objects). */
1560 elf_s390_adjust_gotplt (struct elf_s390_link_hash_entry
*h
)
1562 if (h
->elf
.root
.type
== bfd_link_hash_warning
)
1563 h
= (struct elf_s390_link_hash_entry
*) h
->elf
.root
.u
.i
.link
;
1565 if (h
->gotplt_refcount
<= 0)
1568 /* We simply add the number of gotplt references to the number
1569 * of got references for this symbol. */
1570 h
->elf
.got
.refcount
+= h
->gotplt_refcount
;
1571 h
->gotplt_refcount
= -1;
1574 /* Adjust a symbol defined by a dynamic object and referenced by a
1575 regular object. The current definition is in some section of the
1576 dynamic object, but we're not including those sections. We have to
1577 change the definition to something the rest of the link can
1581 elf_s390_adjust_dynamic_symbol (struct bfd_link_info
*info
,
1582 struct elf_link_hash_entry
*h
)
1584 struct elf_s390_link_hash_table
*htab
;
1587 /* STT_GNU_IFUNC symbol must go through PLT. */
1588 if (s390_is_ifunc_symbol_p (h
))
1591 /* If this is a function, put it in the procedure linkage table. We
1592 will fill in the contents of the procedure linkage table later
1593 (although we could actually do it here). */
1594 if (h
->type
== STT_FUNC
1597 if (h
->plt
.refcount
<= 0
1598 || SYMBOL_CALLS_LOCAL (info
, h
)
1599 || (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1600 && h
->root
.type
== bfd_link_hash_undefweak
))
1602 /* This case can occur if we saw a PLT32 reloc in an input
1603 file, but the symbol was never referred to by a dynamic
1604 object, or if all references were garbage collected. In
1605 such a case, we don't actually need to build a procedure
1606 linkage table, and we can just do a PC32 reloc instead. */
1607 h
->plt
.offset
= (bfd_vma
) -1;
1609 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1615 /* It's possible that we incorrectly decided a .plt reloc was
1616 needed for an R_390_PC32 reloc to a non-function sym in
1617 check_relocs. We can't decide accurately between function and
1618 non-function syms in check-relocs; Objects loaded later in
1619 the link may change h->type. So fix it now. */
1620 h
->plt
.offset
= (bfd_vma
) -1;
1622 /* If this is a weak symbol, and there is a real definition, the
1623 processor independent code will have arranged for us to see the
1624 real definition first, and we can just use the same value. */
1625 if (h
->u
.weakdef
!= NULL
)
1627 BFD_ASSERT (h
->u
.weakdef
->root
.type
== bfd_link_hash_defined
1628 || h
->u
.weakdef
->root
.type
== bfd_link_hash_defweak
);
1629 h
->root
.u
.def
.section
= h
->u
.weakdef
->root
.u
.def
.section
;
1630 h
->root
.u
.def
.value
= h
->u
.weakdef
->root
.u
.def
.value
;
1631 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1632 h
->non_got_ref
= h
->u
.weakdef
->non_got_ref
;
1636 /* This is a reference to a symbol defined by a dynamic object which
1637 is not a function. */
1639 /* If we are creating a shared library, we must presume that the
1640 only references to the symbol are via the global offset table.
1641 For such cases we need not do anything here; the relocations will
1642 be handled correctly by relocate_section. */
1646 /* If there are no references to this symbol that do not use the
1647 GOT, we don't need to generate a copy reloc. */
1648 if (!h
->non_got_ref
)
1651 /* If -z nocopyreloc was given, we won't generate them either. */
1652 if (info
->nocopyreloc
)
1658 if (ELIMINATE_COPY_RELOCS
)
1660 struct elf_s390_link_hash_entry
* eh
;
1661 struct elf_dyn_relocs
*p
;
1663 eh
= (struct elf_s390_link_hash_entry
*) h
;
1664 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1666 s
= p
->sec
->output_section
;
1667 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1671 /* If we didn't find any dynamic relocs in read-only sections, then
1672 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1680 /* We must allocate the symbol in our .dynbss section, which will
1681 become part of the .bss section of the executable. There will be
1682 an entry for this symbol in the .dynsym section. The dynamic
1683 object will contain position independent code, so all references
1684 from the dynamic object to this symbol will go through the global
1685 offset table. The dynamic linker will use the .dynsym entry to
1686 determine the address it must put in the global offset table, so
1687 both the dynamic object and the regular object will refer to the
1688 same memory location for the variable. */
1690 htab
= elf_s390_hash_table (info
);
1694 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1695 copy the initial value out of the dynamic object and into the
1696 runtime process image. */
1697 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0 && h
->size
!= 0)
1699 htab
->srelbss
->size
+= sizeof (Elf64_External_Rela
);
1705 return _bfd_elf_adjust_dynamic_copy (h
, s
);
1708 /* Allocate space in .plt, .got and associated reloc sections for
1712 allocate_dynrelocs (struct elf_link_hash_entry
*h
,
1715 struct bfd_link_info
*info
;
1716 struct elf_s390_link_hash_table
*htab
;
1717 struct elf_s390_link_hash_entry
*eh
= (struct elf_s390_link_hash_entry
*)h
;
1718 struct elf_dyn_relocs
*p
;
1720 if (h
->root
.type
== bfd_link_hash_indirect
)
1723 info
= (struct bfd_link_info
*) inf
;
1724 htab
= elf_s390_hash_table (info
);
1728 /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it
1729 here if it is defined and referenced in a non-shared object. */
1730 if (s390_is_ifunc_symbol_p (h
) && h
->def_regular
)
1731 return s390_elf_allocate_ifunc_dyn_relocs (info
, h
,
1733 else if (htab
->elf
.dynamic_sections_created
1734 && h
->plt
.refcount
> 0)
1736 /* Make sure this symbol is output as a dynamic symbol.
1737 Undefined weak syms won't yet be marked as dynamic. */
1738 if (h
->dynindx
== -1
1739 && !h
->forced_local
)
1741 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1746 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1748 asection
*s
= htab
->elf
.splt
;
1750 /* If this is the first .plt entry, make room for the special
1753 s
->size
+= PLT_FIRST_ENTRY_SIZE
;
1755 h
->plt
.offset
= s
->size
;
1757 /* If this symbol is not defined in a regular file, and we are
1758 not generating a shared library, then set the symbol to this
1759 location in the .plt. This is required to make function
1760 pointers compare as equal between the normal executable and
1761 the shared library. */
1765 h
->root
.u
.def
.section
= s
;
1766 h
->root
.u
.def
.value
= h
->plt
.offset
;
1769 /* Make room for this entry. */
1770 s
->size
+= PLT_ENTRY_SIZE
;
1772 /* We also need to make an entry in the .got.plt section, which
1773 will be placed in the .got section by the linker script. */
1774 htab
->elf
.sgotplt
->size
+= GOT_ENTRY_SIZE
;
1776 /* We also need to make an entry in the .rela.plt section. */
1777 htab
->elf
.srelplt
->size
+= sizeof (Elf64_External_Rela
);
1781 h
->plt
.offset
= (bfd_vma
) -1;
1783 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1788 h
->plt
.offset
= (bfd_vma
) -1;
1790 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1793 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1794 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1795 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1796 we can save the dynamic TLS relocation. */
1797 if (h
->got
.refcount
> 0
1800 && elf_s390_hash_entry(h
)->tls_type
>= GOT_TLS_IE
)
1802 if (elf_s390_hash_entry(h
)->tls_type
== GOT_TLS_IE_NLT
)
1803 /* For the GOTIE access without a literal pool entry the offset has
1804 to be stored somewhere. The immediate value in the instruction
1805 is not bit enough so the value is stored in the got. */
1807 h
->got
.offset
= htab
->elf
.sgot
->size
;
1808 htab
->elf
.sgot
->size
+= GOT_ENTRY_SIZE
;
1811 h
->got
.offset
= (bfd_vma
) -1;
1813 else if (h
->got
.refcount
> 0)
1817 int tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1819 /* Make sure this symbol is output as a dynamic symbol.
1820 Undefined weak syms won't yet be marked as dynamic. */
1821 if (h
->dynindx
== -1
1822 && !h
->forced_local
)
1824 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1829 h
->got
.offset
= s
->size
;
1830 s
->size
+= GOT_ENTRY_SIZE
;
1831 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1832 if (tls_type
== GOT_TLS_GD
)
1833 s
->size
+= GOT_ENTRY_SIZE
;
1834 dyn
= htab
->elf
.dynamic_sections_created
;
1835 /* R_390_TLS_IE64 needs one dynamic relocation,
1836 R_390_TLS_GD64 needs one if local symbol and two if global. */
1837 if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1838 || tls_type
>= GOT_TLS_IE
)
1839 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1840 else if (tls_type
== GOT_TLS_GD
)
1841 htab
->elf
.srelgot
->size
+= 2 * sizeof (Elf64_External_Rela
);
1842 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1843 || h
->root
.type
!= bfd_link_hash_undefweak
)
1845 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1846 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
1849 h
->got
.offset
= (bfd_vma
) -1;
1851 if (eh
->dyn_relocs
== NULL
)
1854 /* In the shared -Bsymbolic case, discard space allocated for
1855 dynamic pc-relative relocs against symbols which turn out to be
1856 defined in regular objects. For the normal shared case, discard
1857 space for pc-relative relocs that have become local due to symbol
1858 visibility changes. */
1862 if (SYMBOL_CALLS_LOCAL (info
, h
))
1864 struct elf_dyn_relocs
**pp
;
1866 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1868 p
->count
-= p
->pc_count
;
1877 /* Also discard relocs on undefined weak syms with non-default
1879 if (eh
->dyn_relocs
!= NULL
1880 && h
->root
.type
== bfd_link_hash_undefweak
)
1882 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
1883 eh
->dyn_relocs
= NULL
;
1885 /* Make sure undefined weak symbols are output as a dynamic
1887 else if (h
->dynindx
== -1
1888 && !h
->forced_local
)
1890 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1895 else if (ELIMINATE_COPY_RELOCS
)
1897 /* For the non-shared case, discard space for relocs against
1898 symbols which turn out to need copy relocs or are not
1904 || (htab
->elf
.dynamic_sections_created
1905 && (h
->root
.type
== bfd_link_hash_undefweak
1906 || h
->root
.type
== bfd_link_hash_undefined
))))
1908 /* Make sure this symbol is output as a dynamic symbol.
1909 Undefined weak syms won't yet be marked as dynamic. */
1910 if (h
->dynindx
== -1
1911 && !h
->forced_local
)
1913 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1917 /* If that succeeded, we know we'll be keeping all the
1919 if (h
->dynindx
!= -1)
1923 eh
->dyn_relocs
= NULL
;
1928 /* Finally, allocate space. */
1929 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1931 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1932 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1938 /* Find any dynamic relocs that apply to read-only sections. */
1941 readonly_dynrelocs (struct elf_link_hash_entry
*h
, void * inf
)
1943 struct elf_s390_link_hash_entry
*eh
;
1944 struct elf_dyn_relocs
*p
;
1946 eh
= (struct elf_s390_link_hash_entry
*) h
;
1947 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1949 asection
*s
= p
->sec
->output_section
;
1951 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1953 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1955 info
->flags
|= DF_TEXTREL
;
1957 /* Not an error, just cut short the traversal. */
1964 /* Set the sizes of the dynamic sections. */
1967 elf_s390_size_dynamic_sections (bfd
*output_bfd ATTRIBUTE_UNUSED
,
1968 struct bfd_link_info
*info
)
1970 struct elf_s390_link_hash_table
*htab
;
1976 htab
= elf_s390_hash_table (info
);
1980 dynobj
= htab
->elf
.dynobj
;
1984 if (htab
->elf
.dynamic_sections_created
)
1986 /* Set the contents of the .interp section to the interpreter. */
1987 if (info
->executable
)
1989 s
= bfd_get_linker_section (dynobj
, ".interp");
1992 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1993 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1997 /* Set up .got offsets for local syms, and space for local dynamic
1999 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
2001 bfd_signed_vma
*local_got
;
2002 bfd_signed_vma
*end_local_got
;
2003 char *local_tls_type
;
2004 bfd_size_type locsymcount
;
2005 Elf_Internal_Shdr
*symtab_hdr
;
2007 struct plt_entry
*local_plt
;
2010 if (! is_s390_elf (ibfd
))
2013 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
2015 struct elf_dyn_relocs
*p
;
2017 for (p
= elf_section_data (s
)->local_dynrel
; p
!= NULL
; p
= p
->next
)
2019 if (!bfd_is_abs_section (p
->sec
)
2020 && bfd_is_abs_section (p
->sec
->output_section
))
2022 /* Input section has been discarded, either because
2023 it is a copy of a linkonce section or due to
2024 linker script /DISCARD/, so we'll be discarding
2027 else if (p
->count
!= 0)
2029 srela
= elf_section_data (p
->sec
)->sreloc
;
2030 srela
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
2031 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2032 info
->flags
|= DF_TEXTREL
;
2037 local_got
= elf_local_got_refcounts (ibfd
);
2041 symtab_hdr
= &elf_symtab_hdr (ibfd
);
2042 locsymcount
= symtab_hdr
->sh_info
;
2043 end_local_got
= local_got
+ locsymcount
;
2044 local_tls_type
= elf_s390_local_got_tls_type (ibfd
);
2046 srela
= htab
->elf
.srelgot
;
2047 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
2051 *local_got
= s
->size
;
2052 s
->size
+= GOT_ENTRY_SIZE
;
2053 if (*local_tls_type
== GOT_TLS_GD
)
2054 s
->size
+= GOT_ENTRY_SIZE
;
2056 srela
->size
+= sizeof (Elf64_External_Rela
);
2059 *local_got
= (bfd_vma
) -1;
2062 local_plt
= elf_s390_local_plt (ibfd
);
2063 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
2065 if (local_plt
[i
].plt
.refcount
> 0)
2067 local_plt
[i
].plt
.offset
= htab
->elf
.iplt
->size
;
2068 htab
->elf
.iplt
->size
+= PLT_ENTRY_SIZE
;
2069 htab
->elf
.igotplt
->size
+= GOT_ENTRY_SIZE
;
2070 htab
->elf
.irelplt
->size
+= sizeof (Elf64_External_Rela
);
2073 local_plt
[i
].plt
.offset
= (bfd_vma
) -1;
2077 if (htab
->tls_ldm_got
.refcount
> 0)
2079 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2081 htab
->tls_ldm_got
.offset
= htab
->elf
.sgot
->size
;
2082 htab
->elf
.sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2083 htab
->elf
.srelgot
->size
+= sizeof (Elf64_External_Rela
);
2086 htab
->tls_ldm_got
.offset
= -1;
2088 /* Allocate global sym .plt and .got entries, and space for global
2089 sym dynamic relocs. */
2090 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, info
);
2092 /* We now have determined the sizes of the various dynamic sections.
2093 Allocate memory for them. */
2095 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2097 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2100 if (s
== htab
->elf
.splt
2101 || s
== htab
->elf
.sgot
2102 || s
== htab
->elf
.sgotplt
2103 || s
== htab
->sdynbss
2104 || s
== htab
->elf
.iplt
2105 || s
== htab
->elf
.igotplt
2106 || s
== htab
->irelifunc
)
2108 /* Strip this section if we don't need it; see the
2111 else if (CONST_STRNEQ (bfd_get_section_name (dynobj
, s
), ".rela"))
2113 if (s
->size
!= 0 && s
!= htab
->elf
.srelplt
)
2116 /* We use the reloc_count field as a counter if we need
2117 to copy relocs into the output file. */
2122 /* It's not one of our sections, so don't allocate space. */
2128 /* If we don't need this section, strip it from the
2129 output file. This is to handle .rela.bss and
2130 .rela.plt. We must create it in
2131 create_dynamic_sections, because it must be created
2132 before the linker maps input sections to output
2133 sections. The linker does that before
2134 adjust_dynamic_symbol is called, and it is that
2135 function which decides whether anything needs to go
2136 into these sections. */
2138 s
->flags
|= SEC_EXCLUDE
;
2142 if ((s
->flags
& SEC_HAS_CONTENTS
) == 0)
2145 /* Allocate memory for the section contents. We use bfd_zalloc
2146 here in case unused entries are not reclaimed before the
2147 section's contents are written out. This should not happen,
2148 but this way if it does, we get a R_390_NONE reloc instead
2150 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2151 if (s
->contents
== NULL
)
2155 if (htab
->elf
.dynamic_sections_created
)
2157 /* Add some entries to the .dynamic section. We fill in the
2158 values later, in elf_s390_finish_dynamic_sections, but we
2159 must add the entries now so that we get the correct size for
2160 the .dynamic section. The DT_DEBUG entry is filled in by the
2161 dynamic linker and used by the debugger. */
2162 #define add_dynamic_entry(TAG, VAL) \
2163 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2165 if (info
->executable
)
2167 if (!add_dynamic_entry (DT_DEBUG
, 0))
2171 if (htab
->elf
.splt
->size
!= 0)
2173 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2174 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2175 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2176 || !add_dynamic_entry (DT_JMPREL
, 0))
2182 if (!add_dynamic_entry (DT_RELA
, 0)
2183 || !add_dynamic_entry (DT_RELASZ
, 0)
2184 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2187 /* If any dynamic relocs apply to a read-only section,
2188 then we need a DT_TEXTREL entry. */
2189 if ((info
->flags
& DF_TEXTREL
) == 0)
2190 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2193 if ((info
->flags
& DF_TEXTREL
) != 0)
2195 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2200 #undef add_dynamic_entry
2205 /* Return the base VMA address which should be subtracted from real addresses
2206 when resolving @dtpoff relocation.
2207 This is PT_TLS segment p_vaddr. */
2210 dtpoff_base (struct bfd_link_info
*info
)
2212 /* If tls_sec is NULL, we should have signalled an error already. */
2213 if (elf_hash_table (info
)->tls_sec
== NULL
)
2215 return elf_hash_table (info
)->tls_sec
->vma
;
2218 /* Return the relocation value for @tpoff relocation
2219 if STT_TLS virtual address is ADDRESS. */
2222 tpoff (struct bfd_link_info
*info
, bfd_vma address
)
2224 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2226 /* If tls_sec is NULL, we should have signalled an error already. */
2227 if (htab
->tls_sec
== NULL
)
2229 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2232 /* Complain if TLS instruction relocation is against an invalid
2236 invalid_tls_insn (bfd
*input_bfd
,
2237 asection
*input_section
,
2238 Elf_Internal_Rela
*rel
)
2240 reloc_howto_type
*howto
;
2242 howto
= elf_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
2243 (*_bfd_error_handler
)
2244 (_("%B(%A+0x%lx): invalid instruction for TLS relocation %s"),
2247 (long) rel
->r_offset
,
2249 bfd_set_error (bfd_error_bad_value
);
2252 /* Relocate a 390 ELF section. */
2255 elf_s390_relocate_section (bfd
*output_bfd
,
2256 struct bfd_link_info
*info
,
2258 asection
*input_section
,
2260 Elf_Internal_Rela
*relocs
,
2261 Elf_Internal_Sym
*local_syms
,
2262 asection
**local_sections
)
2264 struct elf_s390_link_hash_table
*htab
;
2265 Elf_Internal_Shdr
*symtab_hdr
;
2266 struct elf_link_hash_entry
**sym_hashes
;
2267 bfd_vma
*local_got_offsets
;
2268 Elf_Internal_Rela
*rel
;
2269 Elf_Internal_Rela
*relend
;
2271 BFD_ASSERT (is_s390_elf (input_bfd
));
2273 htab
= elf_s390_hash_table (info
);
2277 symtab_hdr
= &elf_symtab_hdr (input_bfd
);
2278 sym_hashes
= elf_sym_hashes (input_bfd
);
2279 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2282 relend
= relocs
+ input_section
->reloc_count
;
2283 for (; rel
< relend
; rel
++)
2285 unsigned int r_type
;
2286 reloc_howto_type
*howto
;
2287 unsigned long r_symndx
;
2288 struct elf_link_hash_entry
*h
;
2289 Elf_Internal_Sym
*sym
;
2293 bfd_boolean unresolved_reloc
;
2294 bfd_reloc_status_type r
;
2296 asection
*base_got
= htab
->elf
.sgot
;
2298 r_type
= ELF64_R_TYPE (rel
->r_info
);
2299 if (r_type
== (int) R_390_GNU_VTINHERIT
2300 || r_type
== (int) R_390_GNU_VTENTRY
)
2302 if (r_type
>= (int) R_390_max
)
2304 bfd_set_error (bfd_error_bad_value
);
2308 howto
= elf_howto_table
+ r_type
;
2309 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2314 unresolved_reloc
= FALSE
;
2315 if (r_symndx
< symtab_hdr
->sh_info
)
2317 sym
= local_syms
+ r_symndx
;
2318 sec
= local_sections
[r_symndx
];
2320 if (ELF_ST_TYPE (sym
->st_info
) == STT_GNU_IFUNC
)
2322 struct plt_entry
*local_plt
= elf_s390_local_plt (input_bfd
);
2323 if (local_plt
== NULL
)
2326 /* Address of the PLT slot. */
2327 relocation
= (htab
->elf
.iplt
->output_section
->vma
2328 + htab
->elf
.iplt
->output_offset
2329 + local_plt
[r_symndx
].plt
.offset
);
2333 case R_390_PLTOFF16
:
2334 case R_390_PLTOFF32
:
2335 case R_390_PLTOFF64
:
2336 relocation
-= htab
->elf
.sgot
->output_section
->vma
;
2338 case R_390_GOTPLT12
:
2339 case R_390_GOTPLT16
:
2340 case R_390_GOTPLT20
:
2341 case R_390_GOTPLT32
:
2342 case R_390_GOTPLT64
:
2343 case R_390_GOTPLTENT
:
2351 /* Write the PLT slot address into the GOT slot. */
2352 bfd_put_64 (output_bfd
, relocation
,
2353 htab
->elf
.sgot
->contents
+
2354 local_got_offsets
[r_symndx
]);
2355 relocation
= (local_got_offsets
[r_symndx
] +
2356 htab
->elf
.sgot
->output_offset
);
2358 if (r_type
== R_390_GOTENT
|| r_type
== R_390_GOTPLTENT
)
2359 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2365 /* The output section is needed later in
2366 finish_dynamic_section when creating the dynamic
2368 local_plt
[r_symndx
].sec
= sec
;
2372 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2376 bfd_boolean warned ATTRIBUTE_UNUSED
;
2378 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2379 r_symndx
, symtab_hdr
, sym_hashes
,
2381 unresolved_reloc
, warned
);
2384 if (sec
!= NULL
&& discarded_section (sec
))
2385 RELOC_AGAINST_DISCARDED_SECTION (info
, input_bfd
, input_section
,
2386 rel
, 1, relend
, howto
, 0, contents
);
2388 if (info
->relocatable
)
2393 case R_390_GOTPLT12
:
2394 case R_390_GOTPLT16
:
2395 case R_390_GOTPLT20
:
2396 case R_390_GOTPLT32
:
2397 case R_390_GOTPLT64
:
2398 case R_390_GOTPLTENT
:
2399 /* There are three cases for a GOTPLT relocation. 1) The
2400 relocation is against the jump slot entry of a plt that
2401 will get emitted to the output file. 2) The relocation
2402 is against the jump slot of a plt entry that has been
2403 removed. elf_s390_adjust_gotplt has created a GOT entry
2404 as replacement. 3) The relocation is against a local symbol.
2405 Cases 2) and 3) are the same as the GOT relocation code
2406 so we just have to test for case 1 and fall through for
2408 if (h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
2412 if (s390_is_ifunc_symbol_p (h
))
2414 plt_index
= h
->plt
.offset
/ PLT_ENTRY_SIZE
;
2415 relocation
= (plt_index
* GOT_ENTRY_SIZE
+
2416 htab
->elf
.igotplt
->output_offset
);
2417 if (r_type
== R_390_GOTPLTENT
)
2418 relocation
+= htab
->elf
.igotplt
->output_section
->vma
;
2423 Current offset - size first entry / entry size. */
2424 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) /
2427 /* Offset in GOT is PLT index plus GOT headers(3)
2428 times 4, addr & GOT addr. */
2429 relocation
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2430 if (r_type
== R_390_GOTPLTENT
)
2431 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2433 unresolved_reloc
= FALSE
;
2444 /* Relocation is to the entry for this symbol in the global
2446 if (base_got
== NULL
)
2453 off
= h
->got
.offset
;
2454 dyn
= htab
->elf
.dynamic_sections_created
;
2456 if (s390_is_ifunc_symbol_p (h
))
2458 BFD_ASSERT (h
->plt
.offset
!= (bfd_vma
) -1);
2459 if (off
== (bfd_vma
)-1)
2461 /* No explicit GOT usage so redirect to the
2463 base_got
= htab
->elf
.igotplt
;
2464 off
= h
->plt
.offset
/ PLT_ENTRY_SIZE
* GOT_ENTRY_SIZE
;
2468 /* Explicit GOT slots must contain the address
2469 of the PLT slot. This will be handled in
2470 finish_dynamic_symbol. */
2473 else if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2475 && SYMBOL_REFERENCES_LOCAL (info
, h
))
2476 || (ELF_ST_VISIBILITY (h
->other
)
2477 && h
->root
.type
== bfd_link_hash_undefweak
))
2479 /* This is actually a static link, or it is a
2480 -Bsymbolic link and the symbol is defined
2481 locally, or the symbol was forced to be local
2482 because of a version file. We must initialize
2483 this entry in the global offset table. Since the
2484 offset must always be a multiple of 2, we use the
2485 least significant bit to record whether we have
2486 initialized it already.
2488 When doing a dynamic link, we create a .rel.got
2489 relocation entry to initialize the value. This
2490 is done in the finish_dynamic_symbol routine. */
2495 bfd_put_64 (output_bfd
, relocation
,
2496 base_got
->contents
+ off
);
2501 unresolved_reloc
= FALSE
;
2505 if (local_got_offsets
== NULL
)
2508 off
= local_got_offsets
[r_symndx
];
2510 /* The offset must always be a multiple of 8. We use
2511 the least significant bit to record whether we have
2512 already generated the necessary reloc. */
2517 bfd_put_64 (output_bfd
, relocation
,
2518 htab
->elf
.sgot
->contents
+ off
);
2523 Elf_Internal_Rela outrel
;
2526 s
= htab
->elf
.srelgot
;
2530 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2531 + htab
->elf
.sgot
->output_offset
2533 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2534 outrel
.r_addend
= relocation
;
2536 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2537 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2540 local_got_offsets
[r_symndx
] |= 1;
2544 if (off
>= (bfd_vma
) -2)
2547 relocation
= base_got
->output_offset
+ off
;
2549 /* For @GOTENT the relocation is against the offset between
2550 the instruction and the symbols entry in the GOT and not
2551 between the start of the GOT and the symbols entry. We
2552 add the vma of the GOT to get the correct value. */
2553 if ( r_type
== R_390_GOTENT
2554 || r_type
== R_390_GOTPLTENT
)
2555 relocation
+= base_got
->output_section
->vma
;
2559 case R_390_GOTOFF16
:
2560 case R_390_GOTOFF32
:
2561 case R_390_GOTOFF64
:
2562 /* Relocation is relative to the start of the global offset
2565 /* Note that sgot->output_offset is not involved in this
2566 calculation. We always want the start of .got. If we
2567 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2568 permitted by the ABI, we might have to change this
2570 relocation
-= htab
->elf
.sgot
->output_section
->vma
;
2574 case R_390_GOTPCDBL
:
2575 /* Use global offset table as symbol value. */
2576 relocation
= htab
->elf
.sgot
->output_section
->vma
;
2577 unresolved_reloc
= FALSE
;
2580 case R_390_PLT12DBL
:
2581 case R_390_PLT16DBL
:
2582 case R_390_PLT24DBL
:
2584 case R_390_PLT32DBL
:
2586 /* Relocation is to the entry for this symbol in the
2587 procedure linkage table. */
2589 /* Resolve a PLT32 reloc against a local symbol directly,
2590 without using the procedure linkage table. */
2594 if (h
->plt
.offset
== (bfd_vma
) -1
2595 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2597 /* We didn't make a PLT entry for this symbol. This
2598 happens when statically linking PIC code, or when
2599 using -Bsymbolic. */
2602 if (s390_is_ifunc_symbol_p (h
))
2603 relocation
= (htab
->elf
.iplt
->output_section
->vma
2604 + htab
->elf
.iplt
->output_offset
2607 relocation
= (htab
->elf
.splt
->output_section
->vma
2608 + htab
->elf
.splt
->output_offset
2610 unresolved_reloc
= FALSE
;
2613 case R_390_PLTOFF16
:
2614 case R_390_PLTOFF32
:
2615 case R_390_PLTOFF64
:
2616 /* Relocation is to the entry for this symbol in the
2617 procedure linkage table relative to the start of the GOT. */
2619 /* For local symbols or if we didn't make a PLT entry for
2620 this symbol resolve the symbol directly. */
2622 || h
->plt
.offset
== (bfd_vma
) -1
2623 || (htab
->elf
.splt
== NULL
&& !s390_is_ifunc_symbol_p (h
)))
2625 relocation
-= htab
->elf
.sgot
->output_section
->vma
;
2629 if (s390_is_ifunc_symbol_p (h
))
2630 relocation
= (htab
->elf
.iplt
->output_section
->vma
2631 + htab
->elf
.iplt
->output_offset
2633 - htab
->elf
.sgot
->output_section
->vma
);
2635 relocation
= (htab
->elf
.splt
->output_section
->vma
2636 + htab
->elf
.splt
->output_offset
2638 - htab
->elf
.sgot
->output_section
->vma
);
2639 unresolved_reloc
= FALSE
;
2655 && s390_is_ifunc_symbol_p (h
)
2658 if (!info
->shared
|| !h
->non_got_ref
)
2660 /* For a non-shared object STT_GNU_IFUNC symbol must
2662 relocation
= (htab
->elf
.iplt
->output_section
->vma
2663 + htab
->elf
.iplt
->output_offset
2669 /* For shared objects a runtime relocation is needed. */
2671 Elf_Internal_Rela outrel
;
2674 /* Need a dynamic relocation to get the real function
2676 outrel
.r_offset
= _bfd_elf_section_offset (output_bfd
,
2680 if (outrel
.r_offset
== (bfd_vma
) -1
2681 || outrel
.r_offset
== (bfd_vma
) -2)
2684 outrel
.r_offset
+= (input_section
->output_section
->vma
2685 + input_section
->output_offset
);
2687 if (h
->dynindx
== -1
2689 || info
->executable
)
2691 /* This symbol is resolved locally. */
2692 outrel
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
2693 outrel
.r_addend
= (h
->root
.u
.def
.value
2694 + h
->root
.u
.def
.section
->output_section
->vma
2695 + h
->root
.u
.def
.section
->output_offset
);
2699 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2700 outrel
.r_addend
= 0;
2703 sreloc
= htab
->elf
.irelifunc
;
2704 elf_append_rela (output_bfd
, sreloc
, &outrel
);
2706 /* If this reloc is against an external symbol, we
2707 do not want to fiddle with the addend. Otherwise,
2708 we need to include the symbol value so that it
2709 becomes an addend for the dynamic reloc. For an
2710 internal symbol, we have updated addend. */
2715 if ((input_section
->flags
& SEC_ALLOC
) == 0)
2720 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2721 || h
->root
.type
!= bfd_link_hash_undefweak
)
2722 && ((r_type
!= R_390_PC16
2723 && r_type
!= R_390_PC12DBL
2724 && r_type
!= R_390_PC16DBL
2725 && r_type
!= R_390_PC24DBL
2726 && r_type
!= R_390_PC32
2727 && r_type
!= R_390_PC32DBL
2728 && r_type
!= R_390_PC64
)
2729 || !SYMBOL_CALLS_LOCAL (info
, h
)))
2730 || (ELIMINATE_COPY_RELOCS
2737 || h
->root
.type
== bfd_link_hash_undefweak
2738 || h
->root
.type
== bfd_link_hash_undefined
)))
2740 Elf_Internal_Rela outrel
;
2741 bfd_boolean skip
, relocate
;
2745 /* When generating a shared object, these relocations
2746 are copied into the output file to be resolved at run
2752 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2754 if (outrel
.r_offset
== (bfd_vma
) -1)
2756 else if (outrel
.r_offset
== (bfd_vma
) -2)
2757 skip
= TRUE
, relocate
= TRUE
;
2759 outrel
.r_offset
+= (input_section
->output_section
->vma
2760 + input_section
->output_offset
);
2763 memset (&outrel
, 0, sizeof outrel
);
2766 && (r_type
== R_390_PC16
2767 || r_type
== R_390_PC12DBL
2768 || r_type
== R_390_PC16DBL
2769 || r_type
== R_390_PC24DBL
2770 || r_type
== R_390_PC32
2771 || r_type
== R_390_PC32DBL
2772 || r_type
== R_390_PC64
2774 || !SYMBOLIC_BIND (info
, h
)
2775 || !h
->def_regular
))
2777 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2778 outrel
.r_addend
= rel
->r_addend
;
2782 /* This symbol is local, or marked to become local. */
2783 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2784 if (r_type
== R_390_64
)
2787 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2793 if (bfd_is_abs_section (sec
))
2795 else if (sec
== NULL
|| sec
->owner
== NULL
)
2797 bfd_set_error(bfd_error_bad_value
);
2804 osec
= sec
->output_section
;
2805 sindx
= elf_section_data (osec
)->dynindx
;
2809 osec
= htab
->elf
.text_index_section
;
2810 sindx
= elf_section_data (osec
)->dynindx
;
2812 BFD_ASSERT (sindx
!= 0);
2814 /* We are turning this relocation into one
2815 against a section symbol, so subtract out
2816 the output section's address but not the
2817 offset of the input section in the output
2819 outrel
.r_addend
-= osec
->vma
;
2821 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
2825 sreloc
= elf_section_data (input_section
)->sreloc
;
2829 loc
= sreloc
->contents
;
2830 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2831 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2833 /* If this reloc is against an external symbol, we do
2834 not want to fiddle with the addend. Otherwise, we
2835 need to include the symbol value so that it becomes
2836 an addend for the dynamic reloc. */
2843 /* Relocations for tls literal pool entries. */
2844 case R_390_TLS_IE64
:
2847 Elf_Internal_Rela outrel
;
2851 outrel
.r_offset
= rel
->r_offset
2852 + input_section
->output_section
->vma
2853 + input_section
->output_offset
;
2854 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2855 sreloc
= elf_section_data (input_section
)->sreloc
;
2858 loc
= sreloc
->contents
;
2859 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2860 bfd_elf64_swap_reloc_out (output_bfd
, &outrel
, loc
);
2864 case R_390_TLS_GD64
:
2865 case R_390_TLS_GOTIE64
:
2866 r_type
= elf_s390_tls_transition (info
, r_type
, h
== NULL
);
2867 tls_type
= GOT_UNKNOWN
;
2868 if (h
== NULL
&& local_got_offsets
)
2869 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2872 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2873 if (!info
->shared
&& h
->dynindx
== -1 && tls_type
>= GOT_TLS_IE
)
2874 r_type
= R_390_TLS_LE64
;
2876 if (r_type
== R_390_TLS_GD64
&& tls_type
>= GOT_TLS_IE
)
2877 r_type
= R_390_TLS_IE64
;
2879 if (r_type
== R_390_TLS_LE64
)
2881 /* This relocation gets optimized away by the local exec
2882 access optimization. */
2883 BFD_ASSERT (! unresolved_reloc
);
2884 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2885 contents
+ rel
->r_offset
);
2889 if (htab
->elf
.sgot
== NULL
)
2893 off
= h
->got
.offset
;
2896 if (local_got_offsets
== NULL
)
2899 off
= local_got_offsets
[r_symndx
];
2908 Elf_Internal_Rela outrel
;
2912 if (htab
->elf
.srelgot
== NULL
)
2915 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
2916 + htab
->elf
.sgot
->output_offset
+ off
);
2918 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2919 if (r_type
== R_390_TLS_GD64
)
2920 dr_type
= R_390_TLS_DTPMOD
;
2922 dr_type
= R_390_TLS_TPOFF
;
2923 if (dr_type
== R_390_TLS_TPOFF
&& indx
== 0)
2924 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2926 outrel
.r_addend
= 0;
2927 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
2928 loc
= htab
->elf
.srelgot
->contents
;
2929 loc
+= htab
->elf
.srelgot
->reloc_count
++
2930 * sizeof (Elf64_External_Rela
);
2931 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2933 if (r_type
== R_390_TLS_GD64
)
2937 BFD_ASSERT (! unresolved_reloc
);
2938 bfd_put_64 (output_bfd
,
2939 relocation
- dtpoff_base (info
),
2940 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2944 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_DTPOFF
);
2945 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
2946 outrel
.r_addend
= 0;
2947 htab
->elf
.srelgot
->reloc_count
++;
2948 loc
+= sizeof (Elf64_External_Rela
);
2949 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2956 local_got_offsets
[r_symndx
] |= 1;
2959 if (off
>= (bfd_vma
) -2)
2961 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
2963 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
2964 if (r_type
== R_390_TLS_IE64
|| r_type
== R_390_TLS_IEENT
)
2965 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
2966 unresolved_reloc
= FALSE
;
2970 bfd_put_64 (output_bfd
, htab
->elf
.sgot
->output_offset
+ off
,
2971 contents
+ rel
->r_offset
);
2976 case R_390_TLS_GOTIE12
:
2977 case R_390_TLS_GOTIE20
:
2978 case R_390_TLS_IEENT
:
2981 if (local_got_offsets
== NULL
)
2983 off
= local_got_offsets
[r_symndx
];
2985 goto emit_tls_relocs
;
2989 off
= h
->got
.offset
;
2990 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2991 if (info
->shared
|| h
->dynindx
!= -1 || tls_type
< GOT_TLS_IE
)
2992 goto emit_tls_relocs
;
2995 if (htab
->elf
.sgot
== NULL
)
2998 BFD_ASSERT (! unresolved_reloc
);
2999 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
3000 htab
->elf
.sgot
->contents
+ off
);
3001 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
3002 if (r_type
== R_390_TLS_IEENT
)
3003 relocation
+= htab
->elf
.sgot
->output_section
->vma
;
3004 unresolved_reloc
= FALSE
;
3007 case R_390_TLS_LDM64
:
3009 /* The literal pool entry this relocation refers to gets ignored
3010 by the optimized code of the local exec model. Do nothing
3011 and the value will turn out zero. */
3014 if (htab
->elf
.sgot
== NULL
)
3017 off
= htab
->tls_ldm_got
.offset
;
3022 Elf_Internal_Rela outrel
;
3025 if (htab
->elf
.srelgot
== NULL
)
3028 outrel
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3029 + htab
->elf
.sgot
->output_offset
+ off
);
3031 bfd_put_64 (output_bfd
, 0,
3032 htab
->elf
.sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
3033 outrel
.r_info
= ELF64_R_INFO (0, R_390_TLS_DTPMOD
);
3034 outrel
.r_addend
= 0;
3035 loc
= htab
->elf
.srelgot
->contents
;
3036 loc
+= htab
->elf
.srelgot
->reloc_count
++
3037 * sizeof (Elf64_External_Rela
);
3038 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3039 htab
->tls_ldm_got
.offset
|= 1;
3041 relocation
= htab
->elf
.sgot
->output_offset
+ off
;
3042 unresolved_reloc
= FALSE
;
3045 case R_390_TLS_LE64
:
3048 /* Linking a shared library with non-fpic code requires
3049 a R_390_TLS_TPOFF relocation. */
3050 Elf_Internal_Rela outrel
;
3055 outrel
.r_offset
= rel
->r_offset
3056 + input_section
->output_section
->vma
3057 + input_section
->output_offset
;
3058 if (h
!= NULL
&& h
->dynindx
!= -1)
3062 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_TPOFF
);
3064 outrel
.r_addend
= relocation
- dtpoff_base (info
);
3066 outrel
.r_addend
= 0;
3067 sreloc
= elf_section_data (input_section
)->sreloc
;
3070 loc
= sreloc
->contents
;
3071 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3072 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
3076 BFD_ASSERT (! unresolved_reloc
);
3077 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
3078 contents
+ rel
->r_offset
);
3082 case R_390_TLS_LDO64
:
3083 if (info
->shared
|| (input_section
->flags
& SEC_DEBUGGING
))
3084 relocation
-= dtpoff_base (info
);
3086 /* When converting LDO to LE, we must negate. */
3087 relocation
= -tpoff (info
, relocation
);
3090 /* Relocations for tls instructions. */
3091 case R_390_TLS_LOAD
:
3092 case R_390_TLS_GDCALL
:
3093 case R_390_TLS_LDCALL
:
3094 tls_type
= GOT_UNKNOWN
;
3095 if (h
== NULL
&& local_got_offsets
)
3096 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
3098 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
3100 if (tls_type
== GOT_TLS_GD
)
3103 if (r_type
== R_390_TLS_LOAD
)
3105 if (!info
->shared
&& (h
== NULL
|| h
->dynindx
== -1))
3107 /* IE->LE transition. Four valid cases:
3108 lg %rx,(0,%ry) -> sllg %rx,%ry,0
3109 lg %rx,(%ry,0) -> sllg %rx,%ry,0
3110 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
3111 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
3112 unsigned int insn0
, insn1
, ry
;
3114 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3115 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3116 if (insn1
!= 0x0004)
3117 invalid_tls_insn (input_bfd
, input_section
, rel
);
3119 if ((insn0
& 0xff00f000) == 0xe3000000)
3120 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
3121 ry
= (insn0
& 0x000f0000);
3122 else if ((insn0
& 0xff0f0000) == 0xe3000000)
3123 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
3124 ry
= (insn0
& 0x0000f000) << 4;
3125 else if ((insn0
& 0xff00f000) == 0xe300c000)
3126 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
3127 ry
= (insn0
& 0x000f0000);
3128 else if ((insn0
& 0xff0f0000) == 0xe30c0000)
3129 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
3130 ry
= (insn0
& 0x0000f000) << 4;
3132 invalid_tls_insn (input_bfd
, input_section
, rel
);
3133 insn0
= 0xeb000000 | (insn0
& 0x00f00000) | ry
;
3135 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3136 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3139 else if (r_type
== R_390_TLS_GDCALL
)
3141 unsigned int insn0
, insn1
;
3143 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3144 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3145 if ((insn0
& 0xffff0000) != 0xc0e50000)
3146 invalid_tls_insn (input_bfd
, input_section
, rel
);
3147 if (!info
->shared
&& (h
== NULL
|| h
->dynindx
== -1))
3149 /* GD->LE transition.
3150 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3156 /* GD->IE transition.
3157 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
3161 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3162 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3164 else if (r_type
== R_390_TLS_LDCALL
)
3168 unsigned int insn0
, insn1
;
3170 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
3171 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
3172 if ((insn0
& 0xffff0000) != 0xc0e50000)
3173 invalid_tls_insn (input_bfd
, input_section
, rel
);
3174 /* LD->LE transition.
3175 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
3178 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
3179 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
3188 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
3189 because such sections are not SEC_ALLOC and thus ld.so will
3190 not process them. */
3191 if (unresolved_reloc
3192 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
3194 && _bfd_elf_section_offset (output_bfd
, info
, input_section
,
3195 rel
->r_offset
) != (bfd_vma
) -1)
3196 (*_bfd_error_handler
)
3197 (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"),
3200 (long) rel
->r_offset
,
3202 h
->root
.root
.string
);
3206 /* When applying a 24 bit reloc we need to start one byte
3207 earlier. Otherwise the 32 bit get/put bfd operations might
3208 access a byte after the actual section. */
3209 if (r_type
== R_390_PC24DBL
3210 || r_type
== R_390_PLT24DBL
)
3213 if (r_type
== R_390_20
3214 || r_type
== R_390_GOT20
3215 || r_type
== R_390_GOTPLT20
3216 || r_type
== R_390_TLS_GOTIE20
)
3218 relocation
+= rel
->r_addend
;
3219 relocation
= (relocation
&0xfff) << 8 | (relocation
&0xff000) >> 12;
3220 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3221 contents
, rel
->r_offset
,
3225 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3226 contents
, rel
->r_offset
,
3227 relocation
, rel
->r_addend
);
3229 if (r
!= bfd_reloc_ok
)
3234 name
= h
->root
.root
.string
;
3237 name
= bfd_elf_string_from_elf_section (input_bfd
,
3238 symtab_hdr
->sh_link
,
3243 name
= bfd_section_name (input_bfd
, sec
);
3246 if (r
== bfd_reloc_overflow
)
3249 if (! ((*info
->callbacks
->reloc_overflow
)
3250 (info
, (h
? &h
->root
: NULL
), name
, howto
->name
,
3251 (bfd_vma
) 0, input_bfd
, input_section
,
3257 (*_bfd_error_handler
)
3258 (_("%B(%A+0x%lx): reloc against `%s': error %d"),
3259 input_bfd
, input_section
,
3260 (long) rel
->r_offset
, name
, (int) r
);
3269 /* Generate the PLT slots together with the dynamic relocations needed
3270 for IFUNC symbols. */
3273 elf_s390_finish_ifunc_symbol (bfd
*output_bfd
,
3274 struct bfd_link_info
*info
,
3275 struct elf_link_hash_entry
*h
,
3276 struct elf_s390_link_hash_table
*htab
,
3278 bfd_vma resolver_address
)
3282 Elf_Internal_Rela rela
;
3284 asection
*plt
, *gotplt
, *relplt
;
3286 if (htab
->elf
.iplt
== NULL
3287 || htab
->elf
.igotplt
== NULL
3288 || htab
->elf
.irelplt
== NULL
)
3291 /* Index of the PLT slot within iplt section. */
3292 plt_index
= plt_offset
/ PLT_ENTRY_SIZE
;
3293 plt
= htab
->elf
.iplt
;
3294 /* Offset into the igot.plt section. */
3295 got_offset
= plt_index
* GOT_ENTRY_SIZE
;
3296 gotplt
= htab
->elf
.igotplt
;
3297 relplt
= htab
->elf
.irelplt
;
3299 /* Fill in the blueprint of a PLT. */
3300 memcpy (plt
->contents
+ plt_offset
, elf_s390x_plt_entry
,
3303 /* Fixup the relative address to the GOT entry */
3304 bfd_put_32 (output_bfd
,
3305 (gotplt
->output_section
->vma
+
3306 gotplt
->output_offset
+ got_offset
3307 - (plt
->output_section
->vma
+
3308 plt
->output_offset
+
3310 plt
->contents
+ plt_offset
+ 2);
3311 /* Fixup the relative branch to PLT 0 */
3312 bfd_put_32 (output_bfd
, - (plt
->output_offset
+
3313 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3314 plt
->contents
+ plt_offset
+ 24);
3315 /* Fixup offset into .rela.plt section. */
3316 bfd_put_32 (output_bfd
, relplt
->output_offset
+
3317 plt_index
* sizeof (Elf64_External_Rela
),
3318 plt
->contents
+ plt_offset
+ 28);
3320 /* Fill in the entry in the global offset table.
3321 Points to instruction after GOT offset. */
3322 bfd_put_64 (output_bfd
,
3323 (plt
->output_section
->vma
3324 + plt
->output_offset
3327 gotplt
->contents
+ got_offset
);
3329 /* Fill in the entry in the .rela.plt section. */
3330 rela
.r_offset
= (gotplt
->output_section
->vma
3331 + gotplt
->output_offset
3336 || ((info
->executable
3337 || ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
)
3340 /* The symbol can be locally resolved. */
3341 rela
.r_info
= ELF64_R_INFO (0, R_390_IRELATIVE
);
3342 rela
.r_addend
= resolver_address
;
3346 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3350 loc
= relplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
3351 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3355 /* Finish up dynamic symbol handling. We set the contents of various
3356 dynamic sections here. */
3359 elf_s390_finish_dynamic_symbol (bfd
*output_bfd
,
3360 struct bfd_link_info
*info
,
3361 struct elf_link_hash_entry
*h
,
3362 Elf_Internal_Sym
*sym
)
3364 struct elf_s390_link_hash_table
*htab
;
3365 struct elf_s390_link_hash_entry
*eh
= (struct elf_s390_link_hash_entry
*)h
;
3367 htab
= elf_s390_hash_table (info
);
3371 if (h
->plt
.offset
!= (bfd_vma
) -1)
3375 Elf_Internal_Rela rela
;
3378 /* This symbol has an entry in the procedure linkage table. Set
3380 if (s390_is_ifunc_symbol_p (h
))
3382 /* If we can resolve the IFUNC symbol locally we generate an
3384 elf_s390_finish_ifunc_symbol (output_bfd
, info
, h
, htab
, h
->plt
.offset
,
3385 eh
->ifunc_resolver_address
+
3386 eh
->ifunc_resolver_section
->output_offset
+
3387 eh
->ifunc_resolver_section
->output_section
->vma
);
3389 /* Fallthrough. Handling of explicit GOT slots of IFUNC
3390 symbols is below. */
3394 if (h
->dynindx
== -1
3395 || htab
->elf
.splt
== NULL
3396 || htab
->elf
.sgotplt
== NULL
3397 || htab
->elf
.srelplt
== NULL
)
3401 Current offset - size first entry / entry size. */
3402 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3404 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3406 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3408 /* Fill in the blueprint of a PLT. */
3409 memcpy (htab
->elf
.splt
->contents
+ h
->plt
.offset
, elf_s390x_plt_entry
,
3412 /* Fixup the relative address to the GOT entry */
3413 bfd_put_32 (output_bfd
,
3414 (htab
->elf
.sgotplt
->output_section
->vma
+
3415 htab
->elf
.sgotplt
->output_offset
+ got_offset
3416 - (htab
->elf
.splt
->output_section
->vma
+
3417 htab
->elf
.splt
->output_offset
+
3419 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 2);
3420 /* Fixup the relative branch to PLT 0 */
3421 bfd_put_32 (output_bfd
, - (PLT_FIRST_ENTRY_SIZE
+
3422 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3423 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 24);
3424 /* Fixup offset into .rela.plt section. */
3425 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf64_External_Rela
),
3426 htab
->elf
.splt
->contents
+ h
->plt
.offset
+ 28);
3428 /* Fill in the entry in the global offset table.
3429 Points to instruction after GOT offset. */
3430 bfd_put_64 (output_bfd
,
3431 (htab
->elf
.splt
->output_section
->vma
3432 + htab
->elf
.splt
->output_offset
3435 htab
->elf
.sgotplt
->contents
+ got_offset
);
3437 /* Fill in the entry in the .rela.plt section. */
3438 rela
.r_offset
= (htab
->elf
.sgotplt
->output_section
->vma
3439 + htab
->elf
.sgotplt
->output_offset
3441 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3443 loc
= htab
->elf
.srelplt
->contents
+ plt_index
*
3444 sizeof (Elf64_External_Rela
);
3445 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3447 if (!h
->def_regular
)
3449 /* Mark the symbol as undefined, rather than as defined in
3450 the .plt section. Leave the value alone. This is a clue
3451 for the dynamic linker, to make function pointer
3452 comparisons work between an application and shared
3454 sym
->st_shndx
= SHN_UNDEF
;
3459 if (h
->got
.offset
!= (bfd_vma
) -1
3460 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3461 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE
3462 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE_NLT
)
3464 Elf_Internal_Rela rela
;
3467 /* This symbol has an entry in the global offset table. Set it
3469 if (htab
->elf
.sgot
== NULL
|| htab
->elf
.srelgot
== NULL
)
3472 rela
.r_offset
= (htab
->elf
.sgot
->output_section
->vma
3473 + htab
->elf
.sgot
->output_offset
3474 + (h
->got
.offset
&~ (bfd_vma
) 1));
3476 if (h
->def_regular
&& s390_is_ifunc_symbol_p (h
))
3480 /* An explicit GOT slot usage needs GLOB_DAT. If the
3481 symbol references local the implicit got.iplt slot
3482 will be used and the IRELATIVE reloc has been created
3488 /* For non-shared objects explicit GOT slots must be
3489 filled with the PLT slot address for pointer
3490 equality reasons. */
3491 bfd_put_64 (output_bfd
, (htab
->elf
.iplt
->output_section
->vma
3492 + htab
->elf
.iplt
->output_offset
3494 htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3498 else if (info
->shared
3499 && SYMBOL_REFERENCES_LOCAL (info
, h
))
3501 /* If this is a static link, or it is a -Bsymbolic link and
3502 the symbol is defined locally or was forced to be local
3503 because of a version file, we just want to emit a
3504 RELATIVE reloc. The entry in the global offset table
3505 will already have been initialized in the
3506 relocate_section function. */
3507 if (!h
->def_regular
)
3509 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3510 rela
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
3511 rela
.r_addend
= (h
->root
.u
.def
.value
3512 + h
->root
.u
.def
.section
->output_section
->vma
3513 + h
->root
.u
.def
.section
->output_offset
);
3517 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3519 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgot
->contents
+ h
->got
.offset
);
3520 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_GLOB_DAT
);
3524 loc
= htab
->elf
.srelgot
->contents
;
3525 loc
+= htab
->elf
.srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3526 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3531 Elf_Internal_Rela rela
;
3534 /* This symbols needs a copy reloc. Set it up. */
3536 if (h
->dynindx
== -1
3537 || (h
->root
.type
!= bfd_link_hash_defined
3538 && h
->root
.type
!= bfd_link_hash_defweak
)
3539 || htab
->srelbss
== NULL
)
3542 rela
.r_offset
= (h
->root
.u
.def
.value
3543 + h
->root
.u
.def
.section
->output_section
->vma
3544 + h
->root
.u
.def
.section
->output_offset
);
3545 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_COPY
);
3547 loc
= htab
->srelbss
->contents
;
3548 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3549 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3552 /* Mark some specially defined symbols as absolute. */
3553 if (h
== htab
->elf
.hdynamic
3554 || h
== htab
->elf
.hgot
3555 || h
== htab
->elf
.hplt
)
3556 sym
->st_shndx
= SHN_ABS
;
3561 /* Used to decide how to sort relocs in an optimal manner for the
3562 dynamic linker, before writing them out. */
3564 static enum elf_reloc_type_class
3565 elf_s390_reloc_type_class (const struct bfd_link_info
*info ATTRIBUTE_UNUSED
,
3566 const asection
*rel_sec ATTRIBUTE_UNUSED
,
3567 const Elf_Internal_Rela
*rela
)
3569 switch ((int) ELF64_R_TYPE (rela
->r_info
))
3571 case R_390_RELATIVE
:
3572 return reloc_class_relative
;
3573 case R_390_JMP_SLOT
:
3574 return reloc_class_plt
;
3576 return reloc_class_copy
;
3578 return reloc_class_normal
;
3582 /* Finish up the dynamic sections. */
3585 elf_s390_finish_dynamic_sections (bfd
*output_bfd
,
3586 struct bfd_link_info
*info
)
3588 struct elf_s390_link_hash_table
*htab
;
3594 htab
= elf_s390_hash_table (info
);
3598 dynobj
= htab
->elf
.dynobj
;
3599 sdyn
= bfd_get_linker_section (dynobj
, ".dynamic");
3601 if (htab
->elf
.dynamic_sections_created
)
3603 Elf64_External_Dyn
*dyncon
, *dynconend
;
3605 if (sdyn
== NULL
|| htab
->elf
.sgot
== NULL
)
3608 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
3609 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3610 for (; dyncon
< dynconend
; dyncon
++)
3612 Elf_Internal_Dyn dyn
;
3615 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3623 dyn
.d_un
.d_ptr
= htab
->elf
.sgot
->output_section
->vma
;
3627 dyn
.d_un
.d_ptr
= htab
->elf
.srelplt
->output_section
->vma
;
3631 s
= htab
->elf
.srelplt
->output_section
;
3632 dyn
.d_un
.d_val
= s
->size
;
3636 /* The procedure linkage table relocs (DT_JMPREL) should
3637 not be included in the overall relocs (DT_RELA).
3638 Therefore, we override the DT_RELASZ entry here to
3639 make it not include the JMPREL relocs. Since the
3640 linker script arranges for .rela.plt to follow all
3641 other relocation sections, we don't have to worry
3642 about changing the DT_RELA entry. */
3643 s
= htab
->elf
.srelplt
->output_section
;
3644 dyn
.d_un
.d_val
-= s
->size
;
3648 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3651 /* Fill in the special first entry in the procedure linkage table. */
3652 if (htab
->elf
.splt
&& htab
->elf
.splt
->size
> 0)
3654 /* fill in blueprint for plt 0 entry */
3655 memcpy (htab
->elf
.splt
->contents
, elf_s390x_first_plt_entry
,
3656 PLT_FIRST_ENTRY_SIZE
);
3657 /* Fixup relative address to start of GOT */
3658 bfd_put_32 (output_bfd
,
3659 (htab
->elf
.sgotplt
->output_section
->vma
+
3660 htab
->elf
.sgotplt
->output_offset
3661 - htab
->elf
.splt
->output_section
->vma
- 6)/2,
3662 htab
->elf
.splt
->contents
+ 8);
3664 elf_section_data (htab
->elf
.splt
->output_section
)
3665 ->this_hdr
.sh_entsize
= PLT_ENTRY_SIZE
;
3668 if (htab
->elf
.sgotplt
)
3670 /* Fill in the first three entries in the global offset table. */
3671 if (htab
->elf
.sgotplt
->size
> 0)
3673 bfd_put_64 (output_bfd
,
3674 (sdyn
== NULL
? (bfd_vma
) 0
3675 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3676 htab
->elf
.sgotplt
->contents
);
3677 /* One entry for shared object struct ptr. */
3678 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ 8);
3679 /* One entry for _dl_runtime_resolve. */
3680 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->elf
.sgotplt
->contents
+ 12);
3683 elf_section_data (htab
->elf
.sgot
->output_section
)
3684 ->this_hdr
.sh_entsize
= 8;
3687 /* Finish dynamic symbol for local IFUNC symbols. */
3688 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
3690 struct plt_entry
*local_plt
;
3691 Elf_Internal_Sym
*isym
;
3692 Elf_Internal_Shdr
*symtab_hdr
;
3694 symtab_hdr
= &elf_symtab_hdr (ibfd
);
3696 local_plt
= elf_s390_local_plt (ibfd
);
3697 if (local_plt
!= NULL
)
3698 for (i
= 0; i
< symtab_hdr
->sh_info
; i
++)
3700 if (local_plt
[i
].plt
.offset
!= (bfd_vma
) -1)
3702 asection
*sec
= local_plt
[i
].sec
;
3703 isym
= bfd_sym_from_r_symndx (&htab
->sym_cache
, ibfd
, i
);
3707 if (ELF_ST_TYPE (isym
->st_info
) == STT_GNU_IFUNC
)
3708 elf_s390_finish_ifunc_symbol (output_bfd
, info
, NULL
, htab
,
3709 local_plt
[i
].plt
.offset
,
3711 + sec
->output_section
->vma
3712 + sec
->output_offset
);
3721 /* Return address for Ith PLT stub in section PLT, for relocation REL
3722 or (bfd_vma) -1 if it should not be included. */
3725 elf_s390_plt_sym_val (bfd_vma i
, const asection
*plt
,
3726 const arelent
*rel ATTRIBUTE_UNUSED
)
3728 return plt
->vma
+ PLT_FIRST_ENTRY_SIZE
+ i
* PLT_ENTRY_SIZE
;
3731 /* Why was the hash table entry size definition changed from
3732 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3733 this is the only reason for the s390_elf64_size_info structure. */
3735 const struct elf_size_info s390_elf64_size_info
=
3737 sizeof (Elf64_External_Ehdr
),
3738 sizeof (Elf64_External_Phdr
),
3739 sizeof (Elf64_External_Shdr
),
3740 sizeof (Elf64_External_Rel
),
3741 sizeof (Elf64_External_Rela
),
3742 sizeof (Elf64_External_Sym
),
3743 sizeof (Elf64_External_Dyn
),
3744 sizeof (Elf_External_Note
),
3745 8, /* hash-table entry size. */
3746 1, /* internal relocations per external relocations. */
3747 64, /* arch_size. */
3748 3, /* log_file_align. */
3749 ELFCLASS64
, EV_CURRENT
,
3750 bfd_elf64_write_out_phdrs
,
3751 bfd_elf64_write_shdrs_and_ehdr
,
3752 bfd_elf64_checksum_contents
,
3753 bfd_elf64_write_relocs
,
3754 bfd_elf64_swap_symbol_in
,
3755 bfd_elf64_swap_symbol_out
,
3756 bfd_elf64_slurp_reloc_table
,
3757 bfd_elf64_slurp_symbol_table
,
3758 bfd_elf64_swap_dyn_in
,
3759 bfd_elf64_swap_dyn_out
,
3760 bfd_elf64_swap_reloc_in
,
3761 bfd_elf64_swap_reloc_out
,
3762 bfd_elf64_swap_reloca_in
,
3763 bfd_elf64_swap_reloca_out
3766 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3767 #define TARGET_BIG_NAME "elf64-s390"
3768 #define ELF_ARCH bfd_arch_s390
3769 #define ELF_TARGET_ID S390_ELF_DATA
3770 #define ELF_MACHINE_CODE EM_S390
3771 #define ELF_MACHINE_ALT1 EM_S390_OLD
3772 #define ELF_MAXPAGESIZE 0x1000
3774 #define elf_backend_size_info s390_elf64_size_info
3776 #define elf_backend_can_gc_sections 1
3777 #define elf_backend_can_refcount 1
3778 #define elf_backend_want_got_plt 1
3779 #define elf_backend_plt_readonly 1
3780 #define elf_backend_want_plt_sym 0
3781 #define elf_backend_got_header_size 24
3782 #define elf_backend_rela_normal 1
3784 #define elf_info_to_howto elf_s390_info_to_howto
3786 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3787 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3788 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3789 #define bfd_elf64_bfd_reloc_name_lookup elf_s390_reloc_name_lookup
3791 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3792 #define elf_backend_check_relocs elf_s390_check_relocs
3793 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3794 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3795 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3796 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3797 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3798 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3799 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3800 #define elf_backend_relocate_section elf_s390_relocate_section
3801 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3802 #define elf_backend_init_index_section _bfd_elf_init_1_index_section
3803 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3804 #define elf_backend_add_symbol_hook elf_s390_add_symbol_hook
3806 #define bfd_elf64_mkobject elf_s390_mkobject
3807 #define elf_backend_object_p elf_s390_object_p
3809 /* Enable ELF64 archive functions. */
3810 #define bfd_elf64_archive_functions
3811 extern bfd_boolean
bfd_elf64_archive_slurp_armap (bfd
*);
3812 extern bfd_boolean
bfd_elf64_archive_write_armap (bfd
*, unsigned int, struct orl
*, unsigned int, int);
3814 #define bfd_elf64_archive_slurp_extended_name_table _bfd_archive_coff_slurp_extended_name_table
3815 #define bfd_elf64_archive_construct_extended_name_table _bfd_archive_coff_construct_extended_name_table
3816 #define bfd_elf64_archive_truncate_arname _bfd_archive_coff_truncate_arname
3817 #define bfd_elf64_archive_read_ar_hdr _bfd_archive_coff_read_ar_hdr
3818 #define bfd_elf64_archive_write_ar_hdr _bfd_archive_coff_write_ar_hdr
3819 #define bfd_elf64_archive_openr_next_archived_file _bfd_archive_coff_openr_next_archived_file
3820 #define bfd_elf64_archive_get_elt_at_index _bfd_archive_coff_get_elt_at_index
3821 #define bfd_elf64_archive_generic_stat_arch_elt _bfd_archive_coff_generic_stat_arch_elt
3822 #define bfd_elf64_archive_update_armap_timestamp _bfd_archive_coff_update_armap_timestamp
3824 #include "elf64-target.h"