1 /* IBM S/390-specific support for 64-bit ELF
2 Copyright 2000, 2001, 2002, 2003, 2004 Free Software Foundation, Inc.
3 Contributed Martin Schwidefsky (schwidefsky@de.ibm.com).
5 This file is part of BFD, the Binary File Descriptor library.
7 This program is free software; you can redistribute it and/or modify
8 it under the terms of the GNU General Public License as published by
9 the Free Software Foundation; either version 2 of the License, or
10 (at your option) any later version.
12 This program is distributed in the hope that it will be useful,
13 but WITHOUT ANY WARRANTY; without even the implied warranty of
14 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 GNU General Public License for more details.
17 You should have received a copy of the GNU General Public License
18 along with this program; if not, write to the Free Software
19 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
28 static reloc_howto_type
*elf_s390_reloc_type_lookup
29 PARAMS ((bfd
*, bfd_reloc_code_real_type
));
30 static void elf_s390_info_to_howto
31 PARAMS ((bfd
*, arelent
*, Elf_Internal_Rela
*));
32 static bfd_boolean elf_s390_is_local_label_name
33 PARAMS ((bfd
*, const char *));
34 static struct bfd_hash_entry
*link_hash_newfunc
35 PARAMS ((struct bfd_hash_entry
*, struct bfd_hash_table
*, const char *));
36 static struct bfd_link_hash_table
*elf_s390_link_hash_table_create
38 static bfd_boolean create_got_section
39 PARAMS((bfd
*, struct bfd_link_info
*));
40 static bfd_boolean elf_s390_create_dynamic_sections
41 PARAMS((bfd
*, struct bfd_link_info
*));
42 static void elf_s390_copy_indirect_symbol
43 PARAMS ((const struct elf_backend_data
*, struct elf_link_hash_entry
*,
44 struct elf_link_hash_entry
*));
45 static bfd_boolean elf_s390_check_relocs
46 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
47 const Elf_Internal_Rela
*));
48 static asection
*elf_s390_gc_mark_hook
49 PARAMS ((asection
*, struct bfd_link_info
*, Elf_Internal_Rela
*,
50 struct elf_link_hash_entry
*, Elf_Internal_Sym
*));
51 static bfd_boolean elf_s390_gc_sweep_hook
52 PARAMS ((bfd
*, struct bfd_link_info
*, asection
*,
53 const Elf_Internal_Rela
*));
54 struct elf_s390_link_hash_entry
;
55 static void elf_s390_adjust_gotplt
56 PARAMS ((struct elf_s390_link_hash_entry
*));
57 static bfd_boolean elf_s390_adjust_dynamic_symbol
58 PARAMS ((struct bfd_link_info
*, struct elf_link_hash_entry
*));
59 static bfd_boolean allocate_dynrelocs
60 PARAMS ((struct elf_link_hash_entry
*, PTR
));
61 static bfd_boolean readonly_dynrelocs
62 PARAMS ((struct elf_link_hash_entry
*, PTR
));
63 static bfd_boolean elf_s390_size_dynamic_sections
64 PARAMS ((bfd
*, struct bfd_link_info
*));
65 static bfd_boolean elf_s390_relocate_section
66 PARAMS ((bfd
*, struct bfd_link_info
*, bfd
*, asection
*, bfd_byte
*,
67 Elf_Internal_Rela
*, Elf_Internal_Sym
*, asection
**));
68 static bfd_boolean elf_s390_finish_dynamic_symbol
69 PARAMS ((bfd
*, struct bfd_link_info
*, struct elf_link_hash_entry
*,
71 static enum elf_reloc_type_class elf_s390_reloc_type_class
72 PARAMS ((const Elf_Internal_Rela
*));
73 static bfd_boolean elf_s390_finish_dynamic_sections
74 PARAMS ((bfd
*, struct bfd_link_info
*));
75 static bfd_boolean elf_s390_mkobject
77 static bfd_boolean elf_s390_object_p
79 static int elf_s390_tls_transition
80 PARAMS ((struct bfd_link_info
*, int, int));
81 static bfd_reloc_status_type s390_tls_reloc
82 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
83 static bfd_vma dtpoff_base
84 PARAMS ((struct bfd_link_info
*));
86 PARAMS ((struct bfd_link_info
*, bfd_vma
));
87 static void invalid_tls_insn
88 PARAMS ((bfd
*, asection
*, Elf_Internal_Rela
*));
89 static bfd_reloc_status_type s390_elf_ldisp_reloc
90 PARAMS ((bfd
*, arelent
*, asymbol
*, PTR
, asection
*, bfd
*, char **));
94 /* In case we're on a 32-bit machine, construct a 64-bit "-1" value
95 from smaller values. Start with zero, widen, *then* decrement. */
96 #define MINUS_ONE (((bfd_vma)0) - 1)
98 /* The relocation "howto" table. */
99 static reloc_howto_type elf_howto_table
[] =
101 HOWTO (R_390_NONE
, /* type */
103 0, /* size (0 = byte, 1 = short, 2 = long) */
105 FALSE
, /* pc_relative */
107 complain_overflow_dont
, /* complain_on_overflow */
108 bfd_elf_generic_reloc
, /* special_function */
109 "R_390_NONE", /* name */
110 FALSE
, /* partial_inplace */
113 FALSE
), /* pcrel_offset */
115 HOWTO(R_390_8
, 0, 0, 8, FALSE
, 0, complain_overflow_bitfield
,
116 bfd_elf_generic_reloc
, "R_390_8", FALSE
, 0,0x000000ff, FALSE
),
117 HOWTO(R_390_12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
118 bfd_elf_generic_reloc
, "R_390_12", FALSE
, 0,0x00000fff, FALSE
),
119 HOWTO(R_390_16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
120 bfd_elf_generic_reloc
, "R_390_16", FALSE
, 0,0x0000ffff, FALSE
),
121 HOWTO(R_390_32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
122 bfd_elf_generic_reloc
, "R_390_32", FALSE
, 0,0xffffffff, FALSE
),
123 HOWTO(R_390_PC32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
124 bfd_elf_generic_reloc
, "R_390_PC32", FALSE
, 0,0xffffffff, TRUE
),
125 HOWTO(R_390_GOT12
, 0, 1, 12, FALSE
, 0, complain_overflow_bitfield
,
126 bfd_elf_generic_reloc
, "R_390_GOT12", FALSE
, 0,0x00000fff, FALSE
),
127 HOWTO(R_390_GOT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
128 bfd_elf_generic_reloc
, "R_390_GOT32", FALSE
, 0,0xffffffff, FALSE
),
129 HOWTO(R_390_PLT32
, 0, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
130 bfd_elf_generic_reloc
, "R_390_PLT32", FALSE
, 0,0xffffffff, TRUE
),
131 HOWTO(R_390_COPY
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
132 bfd_elf_generic_reloc
, "R_390_COPY", FALSE
, 0,MINUS_ONE
, FALSE
),
133 HOWTO(R_390_GLOB_DAT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
134 bfd_elf_generic_reloc
, "R_390_GLOB_DAT", FALSE
, 0,MINUS_ONE
, FALSE
),
135 HOWTO(R_390_JMP_SLOT
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
136 bfd_elf_generic_reloc
, "R_390_JMP_SLOT", FALSE
, 0,MINUS_ONE
, FALSE
),
137 HOWTO(R_390_RELATIVE
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
138 bfd_elf_generic_reloc
, "R_390_RELATIVE", FALSE
, 0,MINUS_ONE
, FALSE
),
139 HOWTO(R_390_GOTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
140 bfd_elf_generic_reloc
, "R_390_GOTOFF32", FALSE
, 0,MINUS_ONE
, FALSE
),
141 HOWTO(R_390_GOTPC
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
142 bfd_elf_generic_reloc
, "R_390_GOTPC", FALSE
, 0,MINUS_ONE
, TRUE
),
143 HOWTO(R_390_GOT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
144 bfd_elf_generic_reloc
, "R_390_GOT16", FALSE
, 0,0x0000ffff, FALSE
),
145 HOWTO(R_390_PC16
, 0, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
146 bfd_elf_generic_reloc
, "R_390_PC16", FALSE
, 0,0x0000ffff, TRUE
),
147 HOWTO(R_390_PC16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
148 bfd_elf_generic_reloc
, "R_390_PC16DBL", FALSE
, 0,0x0000ffff, TRUE
),
149 HOWTO(R_390_PLT16DBL
, 1, 1, 16, TRUE
, 0, complain_overflow_bitfield
,
150 bfd_elf_generic_reloc
, "R_390_PLT16DBL", FALSE
, 0,0x0000ffff, TRUE
),
151 HOWTO(R_390_PC32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
152 bfd_elf_generic_reloc
, "R_390_PC32DBL", FALSE
, 0,0xffffffff, TRUE
),
153 HOWTO(R_390_PLT32DBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
154 bfd_elf_generic_reloc
, "R_390_PLT32DBL", FALSE
, 0,0xffffffff, TRUE
),
155 HOWTO(R_390_GOTPCDBL
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
156 bfd_elf_generic_reloc
, "R_390_GOTPCDBL", FALSE
, 0,MINUS_ONE
, TRUE
),
157 HOWTO(R_390_64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
158 bfd_elf_generic_reloc
, "R_390_64", FALSE
, 0,MINUS_ONE
, FALSE
),
159 HOWTO(R_390_PC64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
160 bfd_elf_generic_reloc
, "R_390_PC64", FALSE
, 0,MINUS_ONE
, TRUE
),
161 HOWTO(R_390_GOT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
162 bfd_elf_generic_reloc
, "R_390_GOT64", FALSE
, 0,MINUS_ONE
, FALSE
),
163 HOWTO(R_390_PLT64
, 0, 4, 64, TRUE
, 0, complain_overflow_bitfield
,
164 bfd_elf_generic_reloc
, "R_390_PLT64", FALSE
, 0,MINUS_ONE
, TRUE
),
165 HOWTO(R_390_GOTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
166 bfd_elf_generic_reloc
, "R_390_GOTENT", FALSE
, 0,MINUS_ONE
, TRUE
),
167 HOWTO(R_390_GOTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
168 bfd_elf_generic_reloc
, "R_390_GOTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
169 HOWTO(R_390_GOTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
170 bfd_elf_generic_reloc
, "R_390_GOTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
171 HOWTO(R_390_GOTPLT12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
172 bfd_elf_generic_reloc
, "R_390_GOTPLT12", FALSE
, 0,0x00000fff, FALSE
),
173 HOWTO(R_390_GOTPLT16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
174 bfd_elf_generic_reloc
, "R_390_GOTPLT16", FALSE
, 0,0x0000ffff, FALSE
),
175 HOWTO(R_390_GOTPLT32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
176 bfd_elf_generic_reloc
, "R_390_GOTPLT32", FALSE
, 0,0xffffffff, FALSE
),
177 HOWTO(R_390_GOTPLT64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
178 bfd_elf_generic_reloc
, "R_390_GOTPLT64", FALSE
, 0,MINUS_ONE
, FALSE
),
179 HOWTO(R_390_GOTPLTENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
180 bfd_elf_generic_reloc
, "R_390_GOTPLTENT",FALSE
, 0,MINUS_ONE
, TRUE
),
181 HOWTO(R_390_PLTOFF16
, 0, 1, 16, FALSE
, 0, complain_overflow_bitfield
,
182 bfd_elf_generic_reloc
, "R_390_PLTOFF16", FALSE
, 0,0x0000ffff, FALSE
),
183 HOWTO(R_390_PLTOFF32
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
184 bfd_elf_generic_reloc
, "R_390_PLTOFF32", FALSE
, 0,0xffffffff, FALSE
),
185 HOWTO(R_390_PLTOFF64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
186 bfd_elf_generic_reloc
, "R_390_PLTOFF64", FALSE
, 0,MINUS_ONE
, FALSE
),
187 HOWTO(R_390_TLS_LOAD
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
188 s390_tls_reloc
, "R_390_TLS_LOAD", FALSE
, 0, 0, FALSE
),
189 HOWTO(R_390_TLS_GDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
190 s390_tls_reloc
, "R_390_TLS_GDCALL", FALSE
, 0, 0, FALSE
),
191 HOWTO(R_390_TLS_LDCALL
, 0, 0, 0, FALSE
, 0, complain_overflow_dont
,
192 s390_tls_reloc
, "R_390_TLS_LDCALL", FALSE
, 0, 0, FALSE
),
193 EMPTY_HOWTO (R_390_TLS_GD32
), /* Empty entry for R_390_TLS_GD32. */
194 HOWTO(R_390_TLS_GD64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
195 bfd_elf_generic_reloc
, "R_390_TLS_GD64", FALSE
, 0, MINUS_ONE
, FALSE
),
196 HOWTO(R_390_TLS_GOTIE12
, 0, 1, 12, FALSE
, 0, complain_overflow_dont
,
197 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE12", FALSE
, 0, 0x00000fff, FALSE
),
198 EMPTY_HOWTO (R_390_TLS_GOTIE32
), /* Empty entry for R_390_TLS_GOTIE32. */
199 HOWTO(R_390_TLS_GOTIE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
200 bfd_elf_generic_reloc
, "R_390_TLS_GOTIE64", FALSE
, 0, MINUS_ONE
, FALSE
),
201 EMPTY_HOWTO (R_390_TLS_LDM32
), /* Empty entry for R_390_TLS_LDM32. */
202 HOWTO(R_390_TLS_LDM64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
203 bfd_elf_generic_reloc
, "R_390_TLS_LDM64", FALSE
, 0, MINUS_ONE
, FALSE
),
204 EMPTY_HOWTO (R_390_TLS_IE32
), /* Empty entry for R_390_TLS_IE32. */
205 HOWTO(R_390_TLS_IE64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
206 bfd_elf_generic_reloc
, "R_390_TLS_IE64", FALSE
, 0, MINUS_ONE
, FALSE
),
207 HOWTO(R_390_TLS_IEENT
, 1, 2, 32, TRUE
, 0, complain_overflow_bitfield
,
208 bfd_elf_generic_reloc
, "R_390_TLS_IEENT", FALSE
, 0, MINUS_ONE
, TRUE
),
209 EMPTY_HOWTO (R_390_TLS_LE32
), /* Empty entry for R_390_TLS_LE32. */
210 HOWTO(R_390_TLS_LE64
, 0, 2, 32, FALSE
, 0, complain_overflow_bitfield
,
211 bfd_elf_generic_reloc
, "R_390_TLS_LE64", FALSE
, 0, MINUS_ONE
, FALSE
),
212 EMPTY_HOWTO (R_390_TLS_LDO32
), /* Empty entry for R_390_TLS_LDO32. */
213 HOWTO(R_390_TLS_LDO64
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
214 bfd_elf_generic_reloc
, "R_390_TLS_LDO64", FALSE
, 0, MINUS_ONE
, FALSE
),
215 HOWTO(R_390_TLS_DTPMOD
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
216 bfd_elf_generic_reloc
, "R_390_TLS_DTPMOD", FALSE
, 0, MINUS_ONE
, FALSE
),
217 HOWTO(R_390_TLS_DTPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
218 bfd_elf_generic_reloc
, "R_390_TLS_DTPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
219 HOWTO(R_390_TLS_TPOFF
, 0, 4, 64, FALSE
, 0, complain_overflow_bitfield
,
220 bfd_elf_generic_reloc
, "R_390_TLS_TPOFF", FALSE
, 0, MINUS_ONE
, FALSE
),
221 HOWTO(R_390_20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
222 s390_elf_ldisp_reloc
, "R_390_20", FALSE
, 0,0x0fffff00, FALSE
),
223 HOWTO(R_390_GOT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
224 s390_elf_ldisp_reloc
, "R_390_GOT20", FALSE
, 0,0x0fffff00, FALSE
),
225 HOWTO(R_390_GOTPLT20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
226 s390_elf_ldisp_reloc
, "R_390_GOTPLT20", FALSE
, 0,0x0fffff00, FALSE
),
227 HOWTO(R_390_TLS_GOTIE20
, 0, 2, 20, FALSE
, 8, complain_overflow_dont
,
228 s390_elf_ldisp_reloc
, "R_390_TLS_GOTIE20", FALSE
, 0,0x0fffff00, FALSE
),
231 /* GNU extension to record C++ vtable hierarchy. */
232 static reloc_howto_type elf64_s390_vtinherit_howto
=
233 HOWTO (R_390_GNU_VTINHERIT
, 0,4,0,FALSE
,0,complain_overflow_dont
, NULL
, "R_390_GNU_VTINHERIT", FALSE
,0, 0, FALSE
);
234 static reloc_howto_type elf64_s390_vtentry_howto
=
235 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
);
237 static reloc_howto_type
*
238 elf_s390_reloc_type_lookup (abfd
, code
)
239 bfd
*abfd ATTRIBUTE_UNUSED
;
240 bfd_reloc_code_real_type code
;
245 return &elf_howto_table
[(int) R_390_NONE
];
247 return &elf_howto_table
[(int) R_390_8
];
248 case BFD_RELOC_390_12
:
249 return &elf_howto_table
[(int) R_390_12
];
251 return &elf_howto_table
[(int) R_390_16
];
253 return &elf_howto_table
[(int) R_390_32
];
255 return &elf_howto_table
[(int) R_390_32
];
256 case BFD_RELOC_32_PCREL
:
257 return &elf_howto_table
[(int) R_390_PC32
];
258 case BFD_RELOC_390_GOT12
:
259 return &elf_howto_table
[(int) R_390_GOT12
];
260 case BFD_RELOC_32_GOT_PCREL
:
261 return &elf_howto_table
[(int) R_390_GOT32
];
262 case BFD_RELOC_390_PLT32
:
263 return &elf_howto_table
[(int) R_390_PLT32
];
264 case BFD_RELOC_390_COPY
:
265 return &elf_howto_table
[(int) R_390_COPY
];
266 case BFD_RELOC_390_GLOB_DAT
:
267 return &elf_howto_table
[(int) R_390_GLOB_DAT
];
268 case BFD_RELOC_390_JMP_SLOT
:
269 return &elf_howto_table
[(int) R_390_JMP_SLOT
];
270 case BFD_RELOC_390_RELATIVE
:
271 return &elf_howto_table
[(int) R_390_RELATIVE
];
272 case BFD_RELOC_32_GOTOFF
:
273 return &elf_howto_table
[(int) R_390_GOTOFF32
];
274 case BFD_RELOC_390_GOTPC
:
275 return &elf_howto_table
[(int) R_390_GOTPC
];
276 case BFD_RELOC_390_GOT16
:
277 return &elf_howto_table
[(int) R_390_GOT16
];
278 case BFD_RELOC_16_PCREL
:
279 return &elf_howto_table
[(int) R_390_PC16
];
280 case BFD_RELOC_390_PC16DBL
:
281 return &elf_howto_table
[(int) R_390_PC16DBL
];
282 case BFD_RELOC_390_PLT16DBL
:
283 return &elf_howto_table
[(int) R_390_PLT16DBL
];
284 case BFD_RELOC_390_PC32DBL
:
285 return &elf_howto_table
[(int) R_390_PC32DBL
];
286 case BFD_RELOC_390_PLT32DBL
:
287 return &elf_howto_table
[(int) R_390_PLT32DBL
];
288 case BFD_RELOC_390_GOTPCDBL
:
289 return &elf_howto_table
[(int) R_390_GOTPCDBL
];
291 return &elf_howto_table
[(int) R_390_64
];
292 case BFD_RELOC_64_PCREL
:
293 return &elf_howto_table
[(int) R_390_PC64
];
294 case BFD_RELOC_390_GOT64
:
295 return &elf_howto_table
[(int) R_390_GOT64
];
296 case BFD_RELOC_390_PLT64
:
297 return &elf_howto_table
[(int) R_390_PLT64
];
298 case BFD_RELOC_390_GOTENT
:
299 return &elf_howto_table
[(int) R_390_GOTENT
];
300 case BFD_RELOC_16_GOTOFF
:
301 return &elf_howto_table
[(int) R_390_GOTOFF16
];
302 case BFD_RELOC_390_GOTOFF64
:
303 return &elf_howto_table
[(int) R_390_GOTOFF64
];
304 case BFD_RELOC_390_GOTPLT12
:
305 return &elf_howto_table
[(int) R_390_GOTPLT12
];
306 case BFD_RELOC_390_GOTPLT16
:
307 return &elf_howto_table
[(int) R_390_GOTPLT16
];
308 case BFD_RELOC_390_GOTPLT32
:
309 return &elf_howto_table
[(int) R_390_GOTPLT32
];
310 case BFD_RELOC_390_GOTPLT64
:
311 return &elf_howto_table
[(int) R_390_GOTPLT64
];
312 case BFD_RELOC_390_GOTPLTENT
:
313 return &elf_howto_table
[(int) R_390_GOTPLTENT
];
314 case BFD_RELOC_390_PLTOFF16
:
315 return &elf_howto_table
[(int) R_390_PLTOFF16
];
316 case BFD_RELOC_390_PLTOFF32
:
317 return &elf_howto_table
[(int) R_390_PLTOFF32
];
318 case BFD_RELOC_390_PLTOFF64
:
319 return &elf_howto_table
[(int) R_390_PLTOFF64
];
320 case BFD_RELOC_390_TLS_LOAD
:
321 return &elf_howto_table
[(int) R_390_TLS_LOAD
];
322 case BFD_RELOC_390_TLS_GDCALL
:
323 return &elf_howto_table
[(int) R_390_TLS_GDCALL
];
324 case BFD_RELOC_390_TLS_LDCALL
:
325 return &elf_howto_table
[(int) R_390_TLS_LDCALL
];
326 case BFD_RELOC_390_TLS_GD64
:
327 return &elf_howto_table
[(int) R_390_TLS_GD64
];
328 case BFD_RELOC_390_TLS_GOTIE12
:
329 return &elf_howto_table
[(int) R_390_TLS_GOTIE12
];
330 case BFD_RELOC_390_TLS_GOTIE64
:
331 return &elf_howto_table
[(int) R_390_TLS_GOTIE64
];
332 case BFD_RELOC_390_TLS_LDM64
:
333 return &elf_howto_table
[(int) R_390_TLS_LDM64
];
334 case BFD_RELOC_390_TLS_IE64
:
335 return &elf_howto_table
[(int) R_390_TLS_IE64
];
336 case BFD_RELOC_390_TLS_IEENT
:
337 return &elf_howto_table
[(int) R_390_TLS_IEENT
];
338 case BFD_RELOC_390_TLS_LE64
:
339 return &elf_howto_table
[(int) R_390_TLS_LE64
];
340 case BFD_RELOC_390_TLS_LDO64
:
341 return &elf_howto_table
[(int) R_390_TLS_LDO64
];
342 case BFD_RELOC_390_TLS_DTPMOD
:
343 return &elf_howto_table
[(int) R_390_TLS_DTPMOD
];
344 case BFD_RELOC_390_TLS_DTPOFF
:
345 return &elf_howto_table
[(int) R_390_TLS_DTPOFF
];
346 case BFD_RELOC_390_TLS_TPOFF
:
347 return &elf_howto_table
[(int) R_390_TLS_TPOFF
];
348 case BFD_RELOC_390_20
:
349 return &elf_howto_table
[(int) R_390_20
];
350 case BFD_RELOC_390_GOT20
:
351 return &elf_howto_table
[(int) R_390_GOT20
];
352 case BFD_RELOC_390_GOTPLT20
:
353 return &elf_howto_table
[(int) R_390_GOTPLT20
];
354 case BFD_RELOC_390_TLS_GOTIE20
:
355 return &elf_howto_table
[(int) R_390_TLS_GOTIE20
];
356 case BFD_RELOC_VTABLE_INHERIT
:
357 return &elf64_s390_vtinherit_howto
;
358 case BFD_RELOC_VTABLE_ENTRY
:
359 return &elf64_s390_vtentry_howto
;
366 /* We need to use ELF64_R_TYPE so we have our own copy of this function,
367 and elf64-s390.c has its own copy. */
370 elf_s390_info_to_howto (abfd
, cache_ptr
, dst
)
371 bfd
*abfd ATTRIBUTE_UNUSED
;
373 Elf_Internal_Rela
*dst
;
375 switch (ELF64_R_TYPE(dst
->r_info
))
377 case R_390_GNU_VTINHERIT
:
378 cache_ptr
->howto
= &elf64_s390_vtinherit_howto
;
381 case R_390_GNU_VTENTRY
:
382 cache_ptr
->howto
= &elf64_s390_vtentry_howto
;
386 BFD_ASSERT (ELF64_R_TYPE(dst
->r_info
) < (unsigned int) R_390_max
);
387 cache_ptr
->howto
= &elf_howto_table
[ELF64_R_TYPE(dst
->r_info
)];
391 /* A relocation function which doesn't do anything. */
392 static bfd_reloc_status_type
393 s390_tls_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
,
394 output_bfd
, error_message
)
395 bfd
*abfd ATTRIBUTE_UNUSED
;
396 arelent
*reloc_entry
;
397 asymbol
*symbol ATTRIBUTE_UNUSED
;
398 PTR data ATTRIBUTE_UNUSED
;
399 asection
*input_section
;
401 char **error_message ATTRIBUTE_UNUSED
;
404 reloc_entry
->address
+= input_section
->output_offset
;
408 /* Handle the large displacement relocs. */
409 static bfd_reloc_status_type
410 s390_elf_ldisp_reloc (abfd
, reloc_entry
, symbol
, data
, input_section
,
411 output_bfd
, error_message
)
413 arelent
*reloc_entry
;
416 asection
*input_section
;
418 char **error_message ATTRIBUTE_UNUSED
;
420 reloc_howto_type
*howto
= reloc_entry
->howto
;
425 if (output_bfd
!= (bfd
*) NULL
426 && (symbol
->flags
& BSF_SECTION_SYM
) == 0
427 && (! howto
->partial_inplace
428 || reloc_entry
->addend
== 0))
430 reloc_entry
->address
+= input_section
->output_offset
;
433 if (output_bfd
!= NULL
)
434 return bfd_reloc_continue
;
436 sz
= input_section
->rawsize
? input_section
->rawsize
: input_section
->size
;
437 if (reloc_entry
->address
> sz
)
438 return bfd_reloc_outofrange
;
440 relocation
= (symbol
->value
441 + symbol
->section
->output_section
->vma
442 + symbol
->section
->output_offset
);
443 relocation
+= reloc_entry
->addend
;
444 if (howto
->pc_relative
)
446 relocation
-= (input_section
->output_section
->vma
447 + input_section
->output_offset
);
448 relocation
-= reloc_entry
->address
;
451 insn
= bfd_get_32 (abfd
, (bfd_byte
*) data
+ reloc_entry
->address
);
452 insn
|= (relocation
& 0xfff) << 16 | (relocation
& 0xff000) >> 4;
453 bfd_put_32 (abfd
, insn
, (bfd_byte
*) data
+ reloc_entry
->address
);
455 if ((bfd_signed_vma
) relocation
< - 0x80000
456 || (bfd_signed_vma
) relocation
> 0x7ffff)
457 return bfd_reloc_overflow
;
463 elf_s390_is_local_label_name (abfd
, name
)
467 if (name
[0] == '.' && (name
[1] == 'X' || name
[1] == 'L'))
470 return _bfd_elf_is_local_label_name (abfd
, name
);
473 /* Functions for the 390 ELF linker. */
475 /* The name of the dynamic interpreter. This is put in the .interp
478 #define ELF_DYNAMIC_INTERPRETER "/usr/lib/ld.so.1"
480 /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid
481 copying dynamic variables from a shared lib into an app's dynbss
482 section, and instead use a dynamic relocation to point into the
484 #define ELIMINATE_COPY_RELOCS 1
486 /* The size in bytes of the first entry in the procedure linkage table. */
487 #define PLT_FIRST_ENTRY_SIZE 32
488 /* The size in bytes of an entry in the procedure linkage table. */
489 #define PLT_ENTRY_SIZE 32
491 #define GOT_ENTRY_SIZE 8
493 /* The first three entries in a procedure linkage table are reserved,
494 and the initial contents are unimportant (we zero them out).
495 Subsequent entries look like this. See the SVR4 ABI 386
496 supplement to see how this works. */
498 /* For the s390, simple addr offset can only be 0 - 4096.
499 To use the full 16777216 TB address space, several instructions
500 are needed to load an address in a register and execute
501 a branch( or just saving the address)
503 Furthermore, only r 0 and 1 are free to use!!! */
505 /* The first 3 words in the GOT are then reserved.
506 Word 0 is the address of the dynamic table.
507 Word 1 is a pointer to a structure describing the object
508 Word 2 is used to point to the loader entry address.
510 The code for PLT entries looks like this:
512 The GOT holds the address in the PLT to be executed.
513 The loader then gets:
514 24(15) = Pointer to the structure describing the object.
515 28(15) = Offset in symbol table
516 The loader must then find the module where the function is
517 and insert the address in the GOT.
519 PLT1: LARL 1,<fn>@GOTENT # 6 bytes Load address of GOT entry in r1
520 LG 1,0(1) # 6 bytes Load address from GOT in r1
521 BCR 15,1 # 2 bytes Jump to address
522 RET1: BASR 1,0 # 2 bytes Return from GOT 1st time
523 LGF 1,12(1) # 6 bytes Load offset in symbl table in r1
524 BRCL 15,-x # 6 bytes Jump to start of PLT
525 .long ? # 4 bytes offset into symbol table
527 Total = 32 bytes per PLT entry
528 Fixup at offset 2: relative address to GOT entry
529 Fixup at offset 22: relative branch to PLT0
530 Fixup at offset 28: 32 bit offset into symbol table
532 A 32 bit offset into the symbol table is enough. It allows for symbol
533 tables up to a size of 2 gigabyte. A single dynamic object (the main
534 program, any shared library) is limited to 4GB in size and I want to see
535 the program that manages to have a symbol table of more than 2 GB with a
536 total size of at max 4 GB. */
538 #define PLT_ENTRY_WORD0 (bfd_vma) 0xc0100000
539 #define PLT_ENTRY_WORD1 (bfd_vma) 0x0000e310
540 #define PLT_ENTRY_WORD2 (bfd_vma) 0x10000004
541 #define PLT_ENTRY_WORD3 (bfd_vma) 0x07f10d10
542 #define PLT_ENTRY_WORD4 (bfd_vma) 0xe310100c
543 #define PLT_ENTRY_WORD5 (bfd_vma) 0x0014c0f4
544 #define PLT_ENTRY_WORD6 (bfd_vma) 0x00000000
545 #define PLT_ENTRY_WORD7 (bfd_vma) 0x00000000
547 /* The first PLT entry pushes the offset into the symbol table
548 from R1 onto the stack at 8(15) and the loader object info
549 at 12(15), loads the loader address in R1 and jumps to it. */
551 /* The first entry in the PLT:
554 STG 1,56(15) # r1 contains the offset into the symbol table
555 LARL 1,_GLOBAL_OFFSET_TABLE # load address of global offset table
556 MVC 48(8,15),8(1) # move loader ino (object struct address) to stack
557 LG 1,16(1) # get entry address of loader
558 BCR 15,1 # jump to loader
560 Fixup at offset 8: relative address to start of GOT. */
562 #define PLT_FIRST_ENTRY_WORD0 (bfd_vma) 0xe310f038
563 #define PLT_FIRST_ENTRY_WORD1 (bfd_vma) 0x0024c010
564 #define PLT_FIRST_ENTRY_WORD2 (bfd_vma) 0x00000000
565 #define PLT_FIRST_ENTRY_WORD3 (bfd_vma) 0xd207f030
566 #define PLT_FIRST_ENTRY_WORD4 (bfd_vma) 0x1008e310
567 #define PLT_FIRST_ENTRY_WORD5 (bfd_vma) 0x10100004
568 #define PLT_FIRST_ENTRY_WORD6 (bfd_vma) 0x07f10700
569 #define PLT_FIRST_ENTRY_WORD7 (bfd_vma) 0x07000700
571 /* The s390 linker needs to keep track of the number of relocs that it
572 decides to copy as dynamic relocs in check_relocs for each symbol.
573 This is so that it can later discard them if they are found to be
574 unnecessary. We store the information in a field extending the
575 regular ELF linker hash table. */
577 struct elf_s390_dyn_relocs
579 struct elf_s390_dyn_relocs
*next
;
581 /* The input section of the reloc. */
584 /* Total number of relocs copied for the input section. */
587 /* Number of pc-relative relocs copied for the input section. */
588 bfd_size_type pc_count
;
591 /* s390 ELF linker hash entry. */
593 struct elf_s390_link_hash_entry
595 struct elf_link_hash_entry elf
;
597 /* Track dynamic relocs copied for this symbol. */
598 struct elf_s390_dyn_relocs
*dyn_relocs
;
600 /* Number of GOTPLT references for a function. */
601 bfd_signed_vma gotplt_refcount
;
603 #define GOT_UNKNOWN 0
607 #define GOT_TLS_IE_NLT 3
608 unsigned char tls_type
;
611 #define elf_s390_hash_entry(ent) \
612 ((struct elf_s390_link_hash_entry *)(ent))
614 struct elf_s390_obj_tdata
616 struct elf_obj_tdata root
;
618 /* tls_type for each local got entry. */
619 char *local_got_tls_type
;
622 #define elf_s390_tdata(abfd) \
623 ((struct elf_s390_obj_tdata *) (abfd)->tdata.any)
625 #define elf_s390_local_got_tls_type(abfd) \
626 (elf_s390_tdata (abfd)->local_got_tls_type)
629 elf_s390_mkobject (abfd
)
632 bfd_size_type amt
= sizeof (struct elf_s390_obj_tdata
);
633 abfd
->tdata
.any
= bfd_zalloc (abfd
, amt
);
634 if (abfd
->tdata
.any
== NULL
)
640 elf_s390_object_p (abfd
)
643 /* Set the right machine number for an s390 elf32 file. */
644 return bfd_default_set_arch_mach (abfd
, bfd_arch_s390
, bfd_mach_s390_64
);
647 /* s390 ELF linker hash table. */
649 struct elf_s390_link_hash_table
651 struct elf_link_hash_table elf
;
653 /* Short-cuts to get to dynamic linker sections. */
663 bfd_signed_vma refcount
;
667 /* Small local sym to section mapping cache. */
668 struct sym_sec_cache sym_sec
;
671 /* Get the s390 ELF linker hash table from a link_info structure. */
673 #define elf_s390_hash_table(p) \
674 ((struct elf_s390_link_hash_table *) ((p)->hash))
676 /* Create an entry in an s390 ELF linker hash table. */
678 static struct bfd_hash_entry
*
679 link_hash_newfunc (entry
, table
, string
)
680 struct bfd_hash_entry
*entry
;
681 struct bfd_hash_table
*table
;
684 /* Allocate the structure if it has not already been allocated by a
688 entry
= bfd_hash_allocate (table
,
689 sizeof (struct elf_s390_link_hash_entry
));
694 /* Call the allocation method of the superclass. */
695 entry
= _bfd_elf_link_hash_newfunc (entry
, table
, string
);
698 struct elf_s390_link_hash_entry
*eh
;
700 eh
= (struct elf_s390_link_hash_entry
*) entry
;
701 eh
->dyn_relocs
= NULL
;
702 eh
->gotplt_refcount
= 0;
703 eh
->tls_type
= GOT_UNKNOWN
;
709 /* Create an s390 ELF linker hash table. */
711 static struct bfd_link_hash_table
*
712 elf_s390_link_hash_table_create (abfd
)
715 struct elf_s390_link_hash_table
*ret
;
716 bfd_size_type amt
= sizeof (struct elf_s390_link_hash_table
);
718 ret
= (struct elf_s390_link_hash_table
*) bfd_malloc (amt
);
722 if (! _bfd_elf_link_hash_table_init (&ret
->elf
, abfd
, link_hash_newfunc
))
735 ret
->tls_ldm_got
.refcount
= 0;
736 ret
->sym_sec
.abfd
= NULL
;
738 return &ret
->elf
.root
;
741 /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up
742 shortcuts to them in our hash table. */
745 create_got_section (dynobj
, info
)
747 struct bfd_link_info
*info
;
749 struct elf_s390_link_hash_table
*htab
;
751 if (! _bfd_elf_create_got_section (dynobj
, info
))
754 htab
= elf_s390_hash_table (info
);
755 htab
->sgot
= bfd_get_section_by_name (dynobj
, ".got");
756 htab
->sgotplt
= bfd_get_section_by_name (dynobj
, ".got.plt");
757 if (!htab
->sgot
|| !htab
->sgotplt
)
760 htab
->srelgot
= bfd_make_section (dynobj
, ".rela.got");
761 if (htab
->srelgot
== NULL
762 || ! bfd_set_section_flags (dynobj
, htab
->srelgot
,
763 (SEC_ALLOC
| SEC_LOAD
| SEC_HAS_CONTENTS
764 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
766 || ! bfd_set_section_alignment (dynobj
, htab
->srelgot
, 3))
771 /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and
772 .rela.bss sections in DYNOBJ, and set up shortcuts to them in our
776 elf_s390_create_dynamic_sections (dynobj
, info
)
778 struct bfd_link_info
*info
;
780 struct elf_s390_link_hash_table
*htab
;
782 htab
= elf_s390_hash_table (info
);
783 if (!htab
->sgot
&& !create_got_section (dynobj
, info
))
786 if (!_bfd_elf_create_dynamic_sections (dynobj
, info
))
789 htab
->splt
= bfd_get_section_by_name (dynobj
, ".plt");
790 htab
->srelplt
= bfd_get_section_by_name (dynobj
, ".rela.plt");
791 htab
->sdynbss
= bfd_get_section_by_name (dynobj
, ".dynbss");
793 htab
->srelbss
= bfd_get_section_by_name (dynobj
, ".rela.bss");
795 if (!htab
->splt
|| !htab
->srelplt
|| !htab
->sdynbss
796 || (!info
->shared
&& !htab
->srelbss
))
802 /* Copy the extra info we tack onto an elf_link_hash_entry. */
805 elf_s390_copy_indirect_symbol (bed
, dir
, ind
)
806 const struct elf_backend_data
*bed
;
807 struct elf_link_hash_entry
*dir
, *ind
;
809 struct elf_s390_link_hash_entry
*edir
, *eind
;
811 edir
= (struct elf_s390_link_hash_entry
*) dir
;
812 eind
= (struct elf_s390_link_hash_entry
*) ind
;
814 if (eind
->dyn_relocs
!= NULL
)
816 if (edir
->dyn_relocs
!= NULL
)
818 struct elf_s390_dyn_relocs
**pp
;
819 struct elf_s390_dyn_relocs
*p
;
821 if (ind
->root
.type
== bfd_link_hash_indirect
)
824 /* Add reloc counts against the weak sym to the strong sym
825 list. Merge any entries against the same section. */
826 for (pp
= &eind
->dyn_relocs
; (p
= *pp
) != NULL
; )
828 struct elf_s390_dyn_relocs
*q
;
830 for (q
= edir
->dyn_relocs
; q
!= NULL
; q
= q
->next
)
831 if (q
->sec
== p
->sec
)
833 q
->pc_count
+= p
->pc_count
;
834 q
->count
+= p
->count
;
841 *pp
= edir
->dyn_relocs
;
844 edir
->dyn_relocs
= eind
->dyn_relocs
;
845 eind
->dyn_relocs
= NULL
;
848 if (ind
->root
.type
== bfd_link_hash_indirect
849 && dir
->got
.refcount
<= 0)
851 edir
->tls_type
= eind
->tls_type
;
852 eind
->tls_type
= GOT_UNKNOWN
;
855 if (ELIMINATE_COPY_RELOCS
856 && ind
->root
.type
!= bfd_link_hash_indirect
857 && (dir
->elf_link_hash_flags
& ELF_LINK_HASH_DYNAMIC_ADJUSTED
) != 0)
858 /* If called to transfer flags for a weakdef during processing
859 of elf_adjust_dynamic_symbol, don't copy ELF_LINK_NON_GOT_REF.
860 We clear it ourselves for ELIMINATE_COPY_RELOCS. */
861 dir
->elf_link_hash_flags
|=
862 (ind
->elf_link_hash_flags
& (ELF_LINK_HASH_REF_DYNAMIC
863 | ELF_LINK_HASH_REF_REGULAR
864 | ELF_LINK_HASH_REF_REGULAR_NONWEAK
865 | ELF_LINK_HASH_NEEDS_PLT
));
867 _bfd_elf_link_hash_copy_indirect (bed
, dir
, ind
);
871 elf_s390_tls_transition (info
, r_type
, is_local
)
872 struct bfd_link_info
*info
;
884 return R_390_TLS_LE64
;
885 return R_390_TLS_IE64
;
886 case R_390_TLS_GOTIE64
:
888 return R_390_TLS_LE64
;
889 return R_390_TLS_GOTIE64
;
890 case R_390_TLS_LDM64
:
891 return R_390_TLS_LE64
;
897 /* Look through the relocs for a section during the first phase, and
898 allocate space in the global offset table or procedure linkage
902 elf_s390_check_relocs (abfd
, info
, sec
, relocs
)
904 struct bfd_link_info
*info
;
906 const Elf_Internal_Rela
*relocs
;
908 struct elf_s390_link_hash_table
*htab
;
909 Elf_Internal_Shdr
*symtab_hdr
;
910 struct elf_link_hash_entry
**sym_hashes
;
911 const Elf_Internal_Rela
*rel
;
912 const Elf_Internal_Rela
*rel_end
;
914 bfd_signed_vma
*local_got_refcounts
;
915 int tls_type
, old_tls_type
;
917 if (info
->relocatable
)
920 htab
= elf_s390_hash_table (info
);
921 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
922 sym_hashes
= elf_sym_hashes (abfd
);
923 local_got_refcounts
= elf_local_got_refcounts (abfd
);
927 rel_end
= relocs
+ sec
->reloc_count
;
928 for (rel
= relocs
; rel
< rel_end
; rel
++)
931 unsigned long r_symndx
;
932 struct elf_link_hash_entry
*h
;
934 r_symndx
= ELF64_R_SYM (rel
->r_info
);
936 if (r_symndx
>= NUM_SHDR_ENTRIES (symtab_hdr
))
938 (*_bfd_error_handler
) (_("%s: bad symbol index: %d"),
939 bfd_archive_filename (abfd
),
944 if (r_symndx
< symtab_hdr
->sh_info
)
947 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
949 /* Create got section and local_got_refcounts array if they
951 r_type
= elf_s390_tls_transition (info
,
952 ELF64_R_TYPE (rel
->r_info
),
967 case R_390_GOTPLTENT
:
969 case R_390_TLS_GOTIE12
:
970 case R_390_TLS_GOTIE20
:
971 case R_390_TLS_GOTIE64
:
972 case R_390_TLS_IEENT
:
974 case R_390_TLS_LDM64
:
976 && local_got_refcounts
== NULL
)
980 size
= symtab_hdr
->sh_info
;
981 size
*= (sizeof (bfd_signed_vma
) + sizeof(char));
982 local_got_refcounts
= ((bfd_signed_vma
*)
983 bfd_zalloc (abfd
, size
));
984 if (local_got_refcounts
== NULL
)
986 elf_local_got_refcounts (abfd
) = local_got_refcounts
;
987 elf_s390_local_got_tls_type (abfd
)
988 = (char *) (local_got_refcounts
+ symtab_hdr
->sh_info
);
996 if (htab
->sgot
== NULL
)
998 if (htab
->elf
.dynobj
== NULL
)
999 htab
->elf
.dynobj
= abfd
;
1000 if (!create_got_section (htab
->elf
.dynobj
, info
))
1007 case R_390_GOTOFF16
:
1008 case R_390_GOTOFF32
:
1009 case R_390_GOTOFF64
:
1011 case R_390_GOTPCDBL
:
1012 /* Got is created, nothing to be done. */
1015 case R_390_PLT16DBL
:
1017 case R_390_PLT32DBL
:
1019 case R_390_PLTOFF16
:
1020 case R_390_PLTOFF32
:
1021 case R_390_PLTOFF64
:
1022 /* This symbol requires a procedure linkage table entry. We
1023 actually build the entry in adjust_dynamic_symbol,
1024 because this might be a case of linking PIC code which is
1025 never referenced by a dynamic object, in which case we
1026 don't need to generate a procedure linkage table entry
1029 /* If this is a local symbol, we resolve it directly without
1030 creating a procedure linkage table entry. */
1033 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
1034 h
->plt
.refcount
+= 1;
1038 case R_390_GOTPLT12
:
1039 case R_390_GOTPLT16
:
1040 case R_390_GOTPLT20
:
1041 case R_390_GOTPLT32
:
1042 case R_390_GOTPLT64
:
1043 case R_390_GOTPLTENT
:
1044 /* This symbol requires either a procedure linkage table entry
1045 or an entry in the local got. We actually build the entry
1046 in adjust_dynamic_symbol because whether this is really a
1047 global reference can change and with it the fact if we have
1048 to create a plt entry or a local got entry. To be able to
1049 make a once global symbol a local one we have to keep track
1050 of the number of gotplt references that exist for this
1054 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
++;
1055 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_PLT
;
1056 h
->plt
.refcount
+= 1;
1059 local_got_refcounts
[r_symndx
] += 1;
1062 case R_390_TLS_LDM64
:
1063 htab
->tls_ldm_got
.refcount
+= 1;
1066 case R_390_TLS_IE64
:
1067 case R_390_TLS_GOTIE12
:
1068 case R_390_TLS_GOTIE20
:
1069 case R_390_TLS_GOTIE64
:
1070 case R_390_TLS_IEENT
:
1072 info
->flags
|= DF_STATIC_TLS
;
1081 case R_390_TLS_GD64
:
1082 /* This symbol requires a global offset table entry. */
1091 tls_type
= GOT_NORMAL
;
1093 case R_390_TLS_GD64
:
1094 tls_type
= GOT_TLS_GD
;
1096 case R_390_TLS_IE64
:
1097 case R_390_TLS_GOTIE64
:
1098 tls_type
= GOT_TLS_IE
;
1100 case R_390_TLS_GOTIE12
:
1101 case R_390_TLS_GOTIE20
:
1102 case R_390_TLS_IEENT
:
1103 tls_type
= GOT_TLS_IE_NLT
;
1109 h
->got
.refcount
+= 1;
1110 old_tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1114 local_got_refcounts
[r_symndx
] += 1;
1115 old_tls_type
= elf_s390_local_got_tls_type (abfd
) [r_symndx
];
1117 /* If a TLS symbol is accessed using IE at least once,
1118 there is no point to use dynamic model for it. */
1119 if (old_tls_type
!= tls_type
&& old_tls_type
!= GOT_UNKNOWN
)
1121 if (old_tls_type
== GOT_NORMAL
|| tls_type
== GOT_NORMAL
)
1123 (*_bfd_error_handler
)
1124 (_("%s: `%s' accessed both as normal and thread local symbol"),
1125 bfd_archive_filename (abfd
), h
->root
.root
.string
);
1128 if (old_tls_type
> tls_type
)
1129 tls_type
= old_tls_type
;
1132 if (old_tls_type
!= tls_type
)
1135 elf_s390_hash_entry (h
)->tls_type
= tls_type
;
1137 elf_s390_local_got_tls_type (abfd
) [r_symndx
] = tls_type
;
1140 if (r_type
!= R_390_TLS_IE64
)
1144 case R_390_TLS_LE64
:
1147 info
->flags
|= DF_STATIC_TLS
;
1159 if (h
!= NULL
&& !info
->shared
)
1161 /* If this reloc is in a read-only section, we might
1162 need a copy reloc. We can't check reliably at this
1163 stage whether the section is read-only, as input
1164 sections have not yet been mapped to output sections.
1165 Tentatively set the flag for now, and correct in
1166 adjust_dynamic_symbol. */
1167 h
->elf_link_hash_flags
|= ELF_LINK_NON_GOT_REF
;
1169 /* We may need a .plt entry if the function this reloc
1170 refers to is in a shared lib. */
1171 h
->plt
.refcount
+= 1;
1174 /* If we are creating a shared library, and this is a reloc
1175 against a global symbol, or a non PC relative reloc
1176 against a local symbol, then we need to copy the reloc
1177 into the shared library. However, if we are linking with
1178 -Bsymbolic, we do not need to copy a reloc against a
1179 global symbol which is defined in an object we are
1180 including in the link (i.e., DEF_REGULAR is set). At
1181 this point we have not seen all the input files, so it is
1182 possible that DEF_REGULAR is not set now but will be set
1183 later (it is never cleared). In case of a weak definition,
1184 DEF_REGULAR may be cleared later by a strong definition in
1185 a shared library. We account for that possibility below by
1186 storing information in the relocs_copied field of the hash
1187 table entry. A similar situation occurs when creating
1188 shared libraries and symbol visibility changes render the
1191 If on the other hand, we are creating an executable, we
1192 may need to keep relocations for symbols satisfied by a
1193 dynamic library if we manage to avoid copy relocs for the
1196 && (sec
->flags
& SEC_ALLOC
) != 0
1197 && ((ELF64_R_TYPE (rel
->r_info
) != R_390_PC16
1198 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC16DBL
1199 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32
1200 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC32DBL
1201 && ELF64_R_TYPE (rel
->r_info
) != R_390_PC64
)
1203 && (! info
->symbolic
1204 || h
->root
.type
== bfd_link_hash_defweak
1205 || (h
->elf_link_hash_flags
1206 & ELF_LINK_HASH_DEF_REGULAR
) == 0))))
1207 || (ELIMINATE_COPY_RELOCS
1209 && (sec
->flags
& SEC_ALLOC
) != 0
1211 && (h
->root
.type
== bfd_link_hash_defweak
1212 || (h
->elf_link_hash_flags
1213 & ELF_LINK_HASH_DEF_REGULAR
) == 0)))
1215 struct elf_s390_dyn_relocs
*p
;
1216 struct elf_s390_dyn_relocs
**head
;
1218 /* We must copy these reloc types into the output file.
1219 Create a reloc section in dynobj and make room for
1226 name
= (bfd_elf_string_from_elf_section
1228 elf_elfheader (abfd
)->e_shstrndx
,
1229 elf_section_data (sec
)->rel_hdr
.sh_name
));
1233 if (strncmp (name
, ".rela", 5) != 0
1234 || strcmp (bfd_get_section_name (abfd
, sec
),
1237 (*_bfd_error_handler
)
1238 (_("%s: bad relocation section name `%s\'"),
1239 bfd_archive_filename (abfd
), name
);
1242 if (htab
->elf
.dynobj
== NULL
)
1243 htab
->elf
.dynobj
= abfd
;
1245 dynobj
= htab
->elf
.dynobj
;
1246 sreloc
= bfd_get_section_by_name (dynobj
, name
);
1251 sreloc
= bfd_make_section (dynobj
, name
);
1252 flags
= (SEC_HAS_CONTENTS
| SEC_READONLY
1253 | SEC_IN_MEMORY
| SEC_LINKER_CREATED
);
1254 if ((sec
->flags
& SEC_ALLOC
) != 0)
1255 flags
|= SEC_ALLOC
| SEC_LOAD
;
1257 || ! bfd_set_section_flags (dynobj
, sreloc
, flags
)
1258 || ! bfd_set_section_alignment (dynobj
, sreloc
, 3))
1261 elf_section_data (sec
)->sreloc
= sreloc
;
1264 /* If this is a global symbol, we count the number of
1265 relocations we need for this symbol. */
1268 head
= &((struct elf_s390_link_hash_entry
*) h
)->dyn_relocs
;
1272 /* Track dynamic relocs needed for local syms too.
1273 We really need local syms available to do this
1277 s
= bfd_section_from_r_symndx (abfd
, &htab
->sym_sec
,
1282 head
= ((struct elf_s390_dyn_relocs
**)
1283 &elf_section_data (s
)->local_dynrel
);
1287 if (p
== NULL
|| p
->sec
!= sec
)
1289 bfd_size_type amt
= sizeof *p
;
1290 p
= ((struct elf_s390_dyn_relocs
*)
1291 bfd_alloc (htab
->elf
.dynobj
, amt
));
1302 if (ELF64_R_TYPE (rel
->r_info
) == R_390_PC16
1303 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC16DBL
1304 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32
1305 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC32DBL
1306 || ELF64_R_TYPE (rel
->r_info
) == R_390_PC64
)
1311 /* This relocation describes the C++ object vtable hierarchy.
1312 Reconstruct it for later use during GC. */
1313 case R_390_GNU_VTINHERIT
:
1314 if (!bfd_elf_gc_record_vtinherit (abfd
, sec
, h
, rel
->r_offset
))
1318 /* This relocation describes which C++ vtable entries are actually
1319 used. Record for later use during GC. */
1320 case R_390_GNU_VTENTRY
:
1321 if (!bfd_elf_gc_record_vtentry (abfd
, sec
, h
, rel
->r_addend
))
1333 /* Return the section that should be marked against GC for a given
1337 elf_s390_gc_mark_hook (sec
, info
, rel
, h
, sym
)
1339 struct bfd_link_info
*info ATTRIBUTE_UNUSED
;
1340 Elf_Internal_Rela
*rel
;
1341 struct elf_link_hash_entry
*h
;
1342 Elf_Internal_Sym
*sym
;
1346 switch (ELF64_R_TYPE (rel
->r_info
))
1348 case R_390_GNU_VTINHERIT
:
1349 case R_390_GNU_VTENTRY
:
1353 switch (h
->root
.type
)
1355 case bfd_link_hash_defined
:
1356 case bfd_link_hash_defweak
:
1357 return h
->root
.u
.def
.section
;
1359 case bfd_link_hash_common
:
1360 return h
->root
.u
.c
.p
->section
;
1368 return bfd_section_from_elf_index (sec
->owner
, sym
->st_shndx
);
1373 /* Update the got entry reference counts for the section being removed. */
1376 elf_s390_gc_sweep_hook (abfd
, info
, sec
, relocs
)
1378 struct bfd_link_info
*info
;
1380 const Elf_Internal_Rela
*relocs
;
1382 Elf_Internal_Shdr
*symtab_hdr
;
1383 struct elf_link_hash_entry
**sym_hashes
;
1384 bfd_signed_vma
*local_got_refcounts
;
1385 const Elf_Internal_Rela
*rel
, *relend
;
1387 elf_section_data (sec
)->local_dynrel
= NULL
;
1389 symtab_hdr
= &elf_tdata (abfd
)->symtab_hdr
;
1390 sym_hashes
= elf_sym_hashes (abfd
);
1391 local_got_refcounts
= elf_local_got_refcounts (abfd
);
1393 relend
= relocs
+ sec
->reloc_count
;
1394 for (rel
= relocs
; rel
< relend
; rel
++)
1396 unsigned long r_symndx
;
1397 unsigned int r_type
;
1398 struct elf_link_hash_entry
*h
= NULL
;
1400 r_symndx
= ELF64_R_SYM (rel
->r_info
);
1401 if (r_symndx
>= symtab_hdr
->sh_info
)
1403 struct elf_s390_link_hash_entry
*eh
;
1404 struct elf_s390_dyn_relocs
**pp
;
1405 struct elf_s390_dyn_relocs
*p
;
1407 h
= sym_hashes
[r_symndx
- symtab_hdr
->sh_info
];
1408 eh
= (struct elf_s390_link_hash_entry
*) h
;
1410 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; pp
= &p
->next
)
1413 /* Everything must go for SEC. */
1419 r_type
= ELF64_R_TYPE (rel
->r_info
);
1420 r_type
= elf_s390_tls_transition (info
, r_type
, h
!= NULL
);
1423 case R_390_TLS_LDM64
:
1424 if (elf_s390_hash_table (info
)->tls_ldm_got
.refcount
> 0)
1425 elf_s390_hash_table (info
)->tls_ldm_got
.refcount
-= 1;
1428 case R_390_TLS_GD64
:
1429 case R_390_TLS_IE64
:
1430 case R_390_TLS_GOTIE12
:
1431 case R_390_TLS_GOTIE20
:
1432 case R_390_TLS_GOTIE64
:
1433 case R_390_TLS_IEENT
:
1439 case R_390_GOTOFF16
:
1440 case R_390_GOTOFF32
:
1441 case R_390_GOTOFF64
:
1443 case R_390_GOTPCDBL
:
1447 if (h
->got
.refcount
> 0)
1448 h
->got
.refcount
-= 1;
1450 else if (local_got_refcounts
!= NULL
)
1452 if (local_got_refcounts
[r_symndx
] > 0)
1453 local_got_refcounts
[r_symndx
] -= 1;
1472 case R_390_PLT16DBL
:
1474 case R_390_PLT32DBL
:
1476 case R_390_PLTOFF16
:
1477 case R_390_PLTOFF32
:
1478 case R_390_PLTOFF64
:
1481 if (h
->plt
.refcount
> 0)
1482 h
->plt
.refcount
-= 1;
1486 case R_390_GOTPLT12
:
1487 case R_390_GOTPLT16
:
1488 case R_390_GOTPLT20
:
1489 case R_390_GOTPLT32
:
1490 case R_390_GOTPLT64
:
1491 case R_390_GOTPLTENT
:
1494 if (h
->plt
.refcount
> 0)
1496 ((struct elf_s390_link_hash_entry
*) h
)->gotplt_refcount
--;
1497 h
->plt
.refcount
-= 1;
1500 else if (local_got_refcounts
!= NULL
)
1502 if (local_got_refcounts
[r_symndx
] > 0)
1503 local_got_refcounts
[r_symndx
] -= 1;
1515 /* Make sure we emit a GOT entry if the symbol was supposed to have a PLT
1516 entry but we found we will not create any. Called when we find we will
1517 not have any PLT for this symbol, by for example
1518 elf_s390_adjust_dynamic_symbol when we're doing a proper dynamic link,
1519 or elf_s390_size_dynamic_sections if no dynamic sections will be
1520 created (we're only linking static objects). */
1523 elf_s390_adjust_gotplt (h
)
1524 struct elf_s390_link_hash_entry
*h
;
1526 if (h
->elf
.root
.type
== bfd_link_hash_warning
)
1527 h
= (struct elf_s390_link_hash_entry
*) h
->elf
.root
.u
.i
.link
;
1529 if (h
->gotplt_refcount
<= 0)
1532 /* We simply add the number of gotplt references to the number
1533 * of got references for this symbol. */
1534 h
->elf
.got
.refcount
+= h
->gotplt_refcount
;
1535 h
->gotplt_refcount
= -1;
1538 /* Adjust a symbol defined by a dynamic object and referenced by a
1539 regular object. The current definition is in some section of the
1540 dynamic object, but we're not including those sections. We have to
1541 change the definition to something the rest of the link can
1545 elf_s390_adjust_dynamic_symbol (info
, h
)
1546 struct bfd_link_info
*info
;
1547 struct elf_link_hash_entry
*h
;
1549 struct elf_s390_link_hash_table
*htab
;
1551 unsigned int power_of_two
;
1553 /* If this is a function, put it in the procedure linkage table. We
1554 will fill in the contents of the procedure linkage table later
1555 (although we could actually do it here). */
1556 if (h
->type
== STT_FUNC
1557 || (h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_PLT
) != 0)
1559 if (h
->plt
.refcount
<= 0
1561 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) == 0
1562 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_REF_DYNAMIC
) == 0
1563 && h
->root
.type
!= bfd_link_hash_undefweak
1564 && h
->root
.type
!= bfd_link_hash_undefined
))
1566 /* This case can occur if we saw a PLT32 reloc in an input
1567 file, but the symbol was never referred to by a dynamic
1568 object, or if all references were garbage collected. In
1569 such a case, we don't actually need to build a procedure
1570 linkage table, and we can just do a PC32 reloc instead. */
1571 h
->plt
.offset
= (bfd_vma
) -1;
1572 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1573 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1579 /* It's possible that we incorrectly decided a .plt reloc was
1580 needed for an R_390_PC32 reloc to a non-function sym in
1581 check_relocs. We can't decide accurately between function and
1582 non-function syms in check-relocs; Objects loaded later in
1583 the link may change h->type. So fix it now. */
1584 h
->plt
.offset
= (bfd_vma
) -1;
1586 /* If this is a weak symbol, and there is a real definition, the
1587 processor independent code will have arranged for us to see the
1588 real definition first, and we can just use the same value. */
1589 if (h
->weakdef
!= NULL
)
1591 BFD_ASSERT (h
->weakdef
->root
.type
== bfd_link_hash_defined
1592 || h
->weakdef
->root
.type
== bfd_link_hash_defweak
);
1593 h
->root
.u
.def
.section
= h
->weakdef
->root
.u
.def
.section
;
1594 h
->root
.u
.def
.value
= h
->weakdef
->root
.u
.def
.value
;
1595 if (ELIMINATE_COPY_RELOCS
|| info
->nocopyreloc
)
1596 h
->elf_link_hash_flags
1597 = ((h
->elf_link_hash_flags
& ~ELF_LINK_NON_GOT_REF
)
1598 | (h
->weakdef
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
));
1602 /* This is a reference to a symbol defined by a dynamic object which
1603 is not a function. */
1605 /* If we are creating a shared library, we must presume that the
1606 only references to the symbol are via the global offset table.
1607 For such cases we need not do anything here; the relocations will
1608 be handled correctly by relocate_section. */
1612 /* If there are no references to this symbol that do not use the
1613 GOT, we don't need to generate a copy reloc. */
1614 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0)
1617 /* If -z nocopyreloc was given, we won't generate them either. */
1618 if (info
->nocopyreloc
)
1620 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
1624 if (ELIMINATE_COPY_RELOCS
)
1626 struct elf_s390_link_hash_entry
* eh
;
1627 struct elf_s390_dyn_relocs
*p
;
1629 eh
= (struct elf_s390_link_hash_entry
*) h
;
1630 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1632 s
= p
->sec
->output_section
;
1633 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1637 /* If we didn't find any dynamic relocs in read-only sections, then
1638 we'll be keeping the dynamic relocs and avoiding the copy reloc. */
1641 h
->elf_link_hash_flags
&= ~ELF_LINK_NON_GOT_REF
;
1646 /* We must allocate the symbol in our .dynbss section, which will
1647 become part of the .bss section of the executable. There will be
1648 an entry for this symbol in the .dynsym section. The dynamic
1649 object will contain position independent code, so all references
1650 from the dynamic object to this symbol will go through the global
1651 offset table. The dynamic linker will use the .dynsym entry to
1652 determine the address it must put in the global offset table, so
1653 both the dynamic object and the regular object will refer to the
1654 same memory location for the variable. */
1656 htab
= elf_s390_hash_table (info
);
1658 /* We must generate a R_390_COPY reloc to tell the dynamic linker to
1659 copy the initial value out of the dynamic object and into the
1660 runtime process image. */
1661 if ((h
->root
.u
.def
.section
->flags
& SEC_ALLOC
) != 0)
1663 htab
->srelbss
->size
+= sizeof (Elf64_External_Rela
);
1664 h
->elf_link_hash_flags
|= ELF_LINK_HASH_NEEDS_COPY
;
1667 /* We need to figure out the alignment required for this symbol. I
1668 have no idea how ELF linkers handle this. */
1669 power_of_two
= bfd_log2 (h
->size
);
1670 if (power_of_two
> 3)
1673 /* Apply the required alignment. */
1675 s
->size
= BFD_ALIGN (s
->size
, (bfd_size_type
) (1 << power_of_two
));
1676 if (power_of_two
> bfd_get_section_alignment (htab
->elf
.dynobj
, s
))
1678 if (! bfd_set_section_alignment (htab
->elf
.dynobj
, s
, power_of_two
))
1682 /* Define the symbol as being at this point in the section. */
1683 h
->root
.u
.def
.section
= s
;
1684 h
->root
.u
.def
.value
= s
->size
;
1686 /* Increment the section size to make room for the symbol. */
1692 /* Allocate space in .plt, .got and associated reloc sections for
1696 allocate_dynrelocs (h
, inf
)
1697 struct elf_link_hash_entry
*h
;
1700 struct bfd_link_info
*info
;
1701 struct elf_s390_link_hash_table
*htab
;
1702 struct elf_s390_link_hash_entry
*eh
;
1703 struct elf_s390_dyn_relocs
*p
;
1705 if (h
->root
.type
== bfd_link_hash_indirect
)
1708 if (h
->root
.type
== bfd_link_hash_warning
)
1709 /* When warning symbols are created, they **replace** the "real"
1710 entry in the hash table, thus we never get to see the real
1711 symbol in a hash traversal. So look at it now. */
1712 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1714 info
= (struct bfd_link_info
*) inf
;
1715 htab
= elf_s390_hash_table (info
);
1717 if (htab
->elf
.dynamic_sections_created
1718 && h
->plt
.refcount
> 0
1719 && (ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1720 || h
->root
.type
!= bfd_link_hash_undefweak
))
1722 /* Make sure this symbol is output as a dynamic symbol.
1723 Undefined weak syms won't yet be marked as dynamic. */
1724 if (h
->dynindx
== -1
1725 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1727 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1732 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h
))
1734 asection
*s
= htab
->splt
;
1736 /* If this is the first .plt entry, make room for the special
1739 s
->size
+= PLT_FIRST_ENTRY_SIZE
;
1741 h
->plt
.offset
= s
->size
;
1743 /* If this symbol is not defined in a regular file, and we are
1744 not generating a shared library, then set the symbol to this
1745 location in the .plt. This is required to make function
1746 pointers compare as equal between the normal executable and
1747 the shared library. */
1749 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1751 h
->root
.u
.def
.section
= s
;
1752 h
->root
.u
.def
.value
= h
->plt
.offset
;
1755 /* Make room for this entry. */
1756 s
->size
+= PLT_ENTRY_SIZE
;
1758 /* We also need to make an entry in the .got.plt section, which
1759 will be placed in the .got section by the linker script. */
1760 htab
->sgotplt
->size
+= GOT_ENTRY_SIZE
;
1762 /* We also need to make an entry in the .rela.plt section. */
1763 htab
->srelplt
->size
+= sizeof (Elf64_External_Rela
);
1767 h
->plt
.offset
= (bfd_vma
) -1;
1768 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1769 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1774 h
->plt
.offset
= (bfd_vma
) -1;
1775 h
->elf_link_hash_flags
&= ~ELF_LINK_HASH_NEEDS_PLT
;
1776 elf_s390_adjust_gotplt((struct elf_s390_link_hash_entry
*) h
);
1779 /* If R_390_TLS_{IE64,GOTIE64,GOTIE12,IEENT} symbol is now local to
1780 the binary, we can optimize a bit. IE64 and GOTIE64 get converted
1781 to R_390_TLS_LE64 requiring no TLS entry. For GOTIE12 and IEENT
1782 we can save the dynamic TLS relocation. */
1783 if (h
->got
.refcount
> 0
1786 && elf_s390_hash_entry(h
)->tls_type
>= GOT_TLS_IE
)
1788 if (elf_s390_hash_entry(h
)->tls_type
== GOT_TLS_IE_NLT
)
1789 /* For the GOTIE access without a literal pool entry the offset has
1790 to be stored somewhere. The immediate value in the instruction
1791 is not bit enough so the value is stored in the got. */
1793 h
->got
.offset
= htab
->sgot
->size
;
1794 htab
->sgot
->size
+= GOT_ENTRY_SIZE
;
1797 h
->got
.offset
= (bfd_vma
) -1;
1799 else if (h
->got
.refcount
> 0)
1803 int tls_type
= elf_s390_hash_entry(h
)->tls_type
;
1805 /* Make sure this symbol is output as a dynamic symbol.
1806 Undefined weak syms won't yet be marked as dynamic. */
1807 if (h
->dynindx
== -1
1808 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1810 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1815 h
->got
.offset
= s
->size
;
1816 s
->size
+= GOT_ENTRY_SIZE
;
1817 /* R_390_TLS_GD64 needs 2 consecutive GOT slots. */
1818 if (tls_type
== GOT_TLS_GD
)
1819 s
->size
+= GOT_ENTRY_SIZE
;
1820 dyn
= htab
->elf
.dynamic_sections_created
;
1821 /* R_390_TLS_IE64 needs one dynamic relocation,
1822 R_390_TLS_GD64 needs one if local symbol and two if global. */
1823 if ((tls_type
== GOT_TLS_GD
&& h
->dynindx
== -1)
1824 || tls_type
>= GOT_TLS_IE
)
1825 htab
->srelgot
->size
+= sizeof (Elf64_External_Rela
);
1826 else if (tls_type
== GOT_TLS_GD
)
1827 htab
->srelgot
->size
+= 2 * sizeof (Elf64_External_Rela
);
1828 else if ((ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
1829 || h
->root
.type
!= bfd_link_hash_undefweak
)
1831 || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, 0, h
)))
1832 htab
->srelgot
->size
+= sizeof (Elf64_External_Rela
);
1835 h
->got
.offset
= (bfd_vma
) -1;
1837 eh
= (struct elf_s390_link_hash_entry
*) h
;
1838 if (eh
->dyn_relocs
== NULL
)
1841 /* In the shared -Bsymbolic case, discard space allocated for
1842 dynamic pc-relative relocs against symbols which turn out to be
1843 defined in regular objects. For the normal shared case, discard
1844 space for pc-relative relocs that have become local due to symbol
1845 visibility changes. */
1849 if (SYMBOL_REFERENCES_LOCAL (info
, h
))
1851 struct elf_s390_dyn_relocs
**pp
;
1853 for (pp
= &eh
->dyn_relocs
; (p
= *pp
) != NULL
; )
1855 p
->count
-= p
->pc_count
;
1864 /* Also discard relocs on undefined weak syms with non-default
1866 if (ELF_ST_VISIBILITY (h
->other
) != STV_DEFAULT
1867 && h
->root
.type
== bfd_link_hash_undefweak
)
1868 eh
->dyn_relocs
= NULL
;
1870 else if (ELIMINATE_COPY_RELOCS
)
1872 /* For the non-shared case, discard space for relocs against
1873 symbols which turn out to need copy relocs or are not
1876 if ((h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
1877 && (((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0
1878 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
1879 || (htab
->elf
.dynamic_sections_created
1880 && (h
->root
.type
== bfd_link_hash_undefweak
1881 || h
->root
.type
== bfd_link_hash_undefined
))))
1883 /* Make sure this symbol is output as a dynamic symbol.
1884 Undefined weak syms won't yet be marked as dynamic. */
1885 if (h
->dynindx
== -1
1886 && (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
) == 0)
1888 if (! bfd_elf_link_record_dynamic_symbol (info
, h
))
1892 /* If that succeeded, we know we'll be keeping all the
1894 if (h
->dynindx
!= -1)
1898 eh
->dyn_relocs
= NULL
;
1903 /* Finally, allocate space. */
1904 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1906 asection
*sreloc
= elf_section_data (p
->sec
)->sreloc
;
1907 sreloc
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
1913 /* Find any dynamic relocs that apply to read-only sections. */
1916 readonly_dynrelocs (h
, inf
)
1917 struct elf_link_hash_entry
*h
;
1920 struct elf_s390_link_hash_entry
*eh
;
1921 struct elf_s390_dyn_relocs
*p
;
1923 if (h
->root
.type
== bfd_link_hash_warning
)
1924 h
= (struct elf_link_hash_entry
*) h
->root
.u
.i
.link
;
1926 eh
= (struct elf_s390_link_hash_entry
*) h
;
1927 for (p
= eh
->dyn_relocs
; p
!= NULL
; p
= p
->next
)
1929 asection
*s
= p
->sec
->output_section
;
1931 if (s
!= NULL
&& (s
->flags
& SEC_READONLY
) != 0)
1933 struct bfd_link_info
*info
= (struct bfd_link_info
*) inf
;
1935 info
->flags
|= DF_TEXTREL
;
1937 /* Not an error, just cut short the traversal. */
1944 /* Set the sizes of the dynamic sections. */
1947 elf_s390_size_dynamic_sections (output_bfd
, info
)
1948 bfd
*output_bfd ATTRIBUTE_UNUSED
;
1949 struct bfd_link_info
*info
;
1951 struct elf_s390_link_hash_table
*htab
;
1957 htab
= elf_s390_hash_table (info
);
1958 dynobj
= htab
->elf
.dynobj
;
1962 if (htab
->elf
.dynamic_sections_created
)
1964 /* Set the contents of the .interp section to the interpreter. */
1965 if (info
->executable
)
1967 s
= bfd_get_section_by_name (dynobj
, ".interp");
1970 s
->size
= sizeof ELF_DYNAMIC_INTERPRETER
;
1971 s
->contents
= (unsigned char *) ELF_DYNAMIC_INTERPRETER
;
1975 /* Set up .got offsets for local syms, and space for local dynamic
1977 for (ibfd
= info
->input_bfds
; ibfd
!= NULL
; ibfd
= ibfd
->link_next
)
1979 bfd_signed_vma
*local_got
;
1980 bfd_signed_vma
*end_local_got
;
1981 char *local_tls_type
;
1982 bfd_size_type locsymcount
;
1983 Elf_Internal_Shdr
*symtab_hdr
;
1986 if (bfd_get_flavour (ibfd
) != bfd_target_elf_flavour
)
1989 for (s
= ibfd
->sections
; s
!= NULL
; s
= s
->next
)
1991 struct elf_s390_dyn_relocs
*p
;
1993 for (p
= *((struct elf_s390_dyn_relocs
**)
1994 &elf_section_data (s
)->local_dynrel
);
1998 if (!bfd_is_abs_section (p
->sec
)
1999 && bfd_is_abs_section (p
->sec
->output_section
))
2001 /* Input section has been discarded, either because
2002 it is a copy of a linkonce section or due to
2003 linker script /DISCARD/, so we'll be discarding
2006 else if (p
->count
!= 0)
2008 srela
= elf_section_data (p
->sec
)->sreloc
;
2009 srela
->size
+= p
->count
* sizeof (Elf64_External_Rela
);
2010 if ((p
->sec
->output_section
->flags
& SEC_READONLY
) != 0)
2011 info
->flags
|= DF_TEXTREL
;
2016 local_got
= elf_local_got_refcounts (ibfd
);
2020 symtab_hdr
= &elf_tdata (ibfd
)->symtab_hdr
;
2021 locsymcount
= symtab_hdr
->sh_info
;
2022 end_local_got
= local_got
+ locsymcount
;
2023 local_tls_type
= elf_s390_local_got_tls_type (ibfd
);
2025 srela
= htab
->srelgot
;
2026 for (; local_got
< end_local_got
; ++local_got
, ++local_tls_type
)
2030 *local_got
= s
->size
;
2031 s
->size
+= GOT_ENTRY_SIZE
;
2032 if (*local_tls_type
== GOT_TLS_GD
)
2033 s
->size
+= GOT_ENTRY_SIZE
;
2035 srela
->size
+= sizeof (Elf64_External_Rela
);
2038 *local_got
= (bfd_vma
) -1;
2042 if (htab
->tls_ldm_got
.refcount
> 0)
2044 /* Allocate 2 got entries and 1 dynamic reloc for R_390_TLS_LDM64
2046 htab
->tls_ldm_got
.offset
= htab
->sgot
->size
;
2047 htab
->sgot
->size
+= 2 * GOT_ENTRY_SIZE
;
2048 htab
->srelgot
->size
+= sizeof (Elf64_External_Rela
);
2051 htab
->tls_ldm_got
.offset
= -1;
2053 /* Allocate global sym .plt and .got entries, and space for global
2054 sym dynamic relocs. */
2055 elf_link_hash_traverse (&htab
->elf
, allocate_dynrelocs
, (PTR
) info
);
2057 /* We now have determined the sizes of the various dynamic sections.
2058 Allocate memory for them. */
2060 for (s
= dynobj
->sections
; s
!= NULL
; s
= s
->next
)
2062 if ((s
->flags
& SEC_LINKER_CREATED
) == 0)
2067 || s
== htab
->sgotplt
)
2069 /* Strip this section if we don't need it; see the
2072 else if (strncmp (bfd_get_section_name (dynobj
, s
), ".rela", 5) == 0)
2074 if (s
->size
!= 0 && s
!= htab
->srelplt
)
2077 /* We use the reloc_count field as a counter if we need
2078 to copy relocs into the output file. */
2083 /* It's not one of our sections, so don't allocate space. */
2089 /* If we don't need this section, strip it from the
2090 output file. This is to handle .rela.bss and
2091 .rela.plt. We must create it in
2092 create_dynamic_sections, because it must be created
2093 before the linker maps input sections to output
2094 sections. The linker does that before
2095 adjust_dynamic_symbol is called, and it is that
2096 function which decides whether anything needs to go
2097 into these sections. */
2099 _bfd_strip_section_from_output (info
, s
);
2103 /* Allocate memory for the section contents. We use bfd_zalloc
2104 here in case unused entries are not reclaimed before the
2105 section's contents are written out. This should not happen,
2106 but this way if it does, we get a R_390_NONE reloc instead
2108 s
->contents
= (bfd_byte
*) bfd_zalloc (dynobj
, s
->size
);
2109 if (s
->contents
== NULL
)
2113 if (htab
->elf
.dynamic_sections_created
)
2115 /* Add some entries to the .dynamic section. We fill in the
2116 values later, in elf_s390_finish_dynamic_sections, but we
2117 must add the entries now so that we get the correct size for
2118 the .dynamic section. The DT_DEBUG entry is filled in by the
2119 dynamic linker and used by the debugger. */
2120 #define add_dynamic_entry(TAG, VAL) \
2121 _bfd_elf_add_dynamic_entry (info, TAG, VAL)
2123 if (info
->executable
)
2125 if (!add_dynamic_entry (DT_DEBUG
, 0))
2129 if (htab
->splt
->size
!= 0)
2131 if (!add_dynamic_entry (DT_PLTGOT
, 0)
2132 || !add_dynamic_entry (DT_PLTRELSZ
, 0)
2133 || !add_dynamic_entry (DT_PLTREL
, DT_RELA
)
2134 || !add_dynamic_entry (DT_JMPREL
, 0))
2140 if (!add_dynamic_entry (DT_RELA
, 0)
2141 || !add_dynamic_entry (DT_RELASZ
, 0)
2142 || !add_dynamic_entry (DT_RELAENT
, sizeof (Elf64_External_Rela
)))
2145 /* If any dynamic relocs apply to a read-only section,
2146 then we need a DT_TEXTREL entry. */
2147 if ((info
->flags
& DF_TEXTREL
) == 0)
2148 elf_link_hash_traverse (&htab
->elf
, readonly_dynrelocs
,
2151 if ((info
->flags
& DF_TEXTREL
) != 0)
2153 if (!add_dynamic_entry (DT_TEXTREL
, 0))
2158 #undef add_dynamic_entry
2163 /* Return the base VMA address which should be subtracted from real addresses
2164 when resolving @dtpoff relocation.
2165 This is PT_TLS segment p_vaddr. */
2169 struct bfd_link_info
*info
;
2171 /* If tls_sec is NULL, we should have signalled an error already. */
2172 if (elf_hash_table (info
)->tls_sec
== NULL
)
2174 return elf_hash_table (info
)->tls_sec
->vma
;
2177 /* Return the relocation value for @tpoff relocation
2178 if STT_TLS virtual address is ADDRESS. */
2181 tpoff (info
, address
)
2182 struct bfd_link_info
*info
;
2185 struct elf_link_hash_table
*htab
= elf_hash_table (info
);
2187 /* If tls_sec is NULL, we should have signalled an error already. */
2188 if (htab
->tls_sec
== NULL
)
2190 return htab
->tls_size
+ htab
->tls_sec
->vma
- address
;
2193 /* Complain if TLS instruction relocation is against an invalid
2197 invalid_tls_insn (input_bfd
, input_section
, rel
)
2199 asection
*input_section
;
2200 Elf_Internal_Rela
*rel
;
2202 reloc_howto_type
*howto
;
2204 howto
= elf_howto_table
+ ELF64_R_TYPE (rel
->r_info
);
2205 (*_bfd_error_handler
)
2206 (_("%s(%s+0x%lx): invalid instruction for TLS relocation %s"),
2207 bfd_archive_filename (input_bfd
),
2208 bfd_get_section_name (input_bfd
, input_section
),
2209 (long) rel
->r_offset
,
2213 /* Relocate a 390 ELF section. */
2216 elf_s390_relocate_section (output_bfd
, info
, input_bfd
, input_section
,
2217 contents
, relocs
, local_syms
, local_sections
)
2219 struct bfd_link_info
*info
;
2221 asection
*input_section
;
2223 Elf_Internal_Rela
*relocs
;
2224 Elf_Internal_Sym
*local_syms
;
2225 asection
**local_sections
;
2227 struct elf_s390_link_hash_table
*htab
;
2228 Elf_Internal_Shdr
*symtab_hdr
;
2229 struct elf_link_hash_entry
**sym_hashes
;
2230 bfd_vma
*local_got_offsets
;
2231 Elf_Internal_Rela
*rel
;
2232 Elf_Internal_Rela
*relend
;
2234 if (info
->relocatable
)
2237 htab
= elf_s390_hash_table (info
);
2238 symtab_hdr
= &elf_tdata (input_bfd
)->symtab_hdr
;
2239 sym_hashes
= elf_sym_hashes (input_bfd
);
2240 local_got_offsets
= elf_local_got_offsets (input_bfd
);
2243 relend
= relocs
+ input_section
->reloc_count
;
2244 for (; rel
< relend
; rel
++)
2246 unsigned int r_type
;
2247 reloc_howto_type
*howto
;
2248 unsigned long r_symndx
;
2249 struct elf_link_hash_entry
*h
;
2250 Elf_Internal_Sym
*sym
;
2254 bfd_boolean unresolved_reloc
;
2255 bfd_reloc_status_type r
;
2258 r_type
= ELF64_R_TYPE (rel
->r_info
);
2259 if (r_type
== (int) R_390_GNU_VTINHERIT
2260 || r_type
== (int) R_390_GNU_VTENTRY
)
2262 if (r_type
>= (int) R_390_max
)
2264 bfd_set_error (bfd_error_bad_value
);
2268 howto
= elf_howto_table
+ r_type
;
2269 r_symndx
= ELF64_R_SYM (rel
->r_info
);
2271 /* This is a final link. */
2275 unresolved_reloc
= FALSE
;
2276 if (r_symndx
< symtab_hdr
->sh_info
)
2278 sym
= local_syms
+ r_symndx
;
2279 sec
= local_sections
[r_symndx
];
2280 relocation
= _bfd_elf_rela_local_sym (output_bfd
, sym
, &sec
, rel
);
2284 bfd_boolean warned ATTRIBUTE_UNUSED
;
2286 RELOC_FOR_GLOBAL_SYMBOL (info
, input_bfd
, input_section
, rel
,
2287 r_symndx
, symtab_hdr
, sym_hashes
,
2289 unresolved_reloc
, warned
);
2294 case R_390_GOTPLT12
:
2295 case R_390_GOTPLT16
:
2296 case R_390_GOTPLT20
:
2297 case R_390_GOTPLT32
:
2298 case R_390_GOTPLT64
:
2299 case R_390_GOTPLTENT
:
2300 /* There are three cases for a GOTPLT relocation. 1) The
2301 relocation is against the jump slot entry of a plt that
2302 will get emitted to the output file. 2) The relocation
2303 is against the jump slot of a plt entry that has been
2304 removed. elf_s390_adjust_gotplt has created a GOT entry
2305 as replacement. 3) The relocation is against a local symbol.
2306 Cases 2) and 3) are the same as the GOT relocation code
2307 so we just have to test for case 1 and fall through for
2309 if (h
!= NULL
&& h
->plt
.offset
!= (bfd_vma
) -1)
2314 Current offset - size first entry / entry size. */
2315 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) /
2318 /* Offset in GOT is PLT index plus GOT headers(3) times 4,
2320 relocation
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
2321 unresolved_reloc
= FALSE
;
2323 if (r_type
== R_390_GOTPLTENT
)
2324 relocation
+= htab
->sgot
->output_section
->vma
;
2335 /* Relocation is to the entry for this symbol in the global
2337 if (htab
->sgot
== NULL
)
2344 off
= h
->got
.offset
;
2345 dyn
= htab
->elf
.dynamic_sections_created
;
2346 if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn
, info
->shared
, h
)
2350 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
2351 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
2352 || (ELF_ST_VISIBILITY (h
->other
)
2353 && h
->root
.type
== bfd_link_hash_undefweak
))
2355 /* This is actually a static link, or it is a
2356 -Bsymbolic link and the symbol is defined
2357 locally, or the symbol was forced to be local
2358 because of a version file. We must initialize
2359 this entry in the global offset table. Since the
2360 offset must always be a multiple of 2, we use the
2361 least significant bit to record whether we have
2362 initialized it already.
2364 When doing a dynamic link, we create a .rel.got
2365 relocation entry to initialize the value. This
2366 is done in the finish_dynamic_symbol routine. */
2371 bfd_put_64 (output_bfd
, relocation
,
2372 htab
->sgot
->contents
+ off
);
2377 unresolved_reloc
= FALSE
;
2381 if (local_got_offsets
== NULL
)
2384 off
= local_got_offsets
[r_symndx
];
2386 /* The offset must always be a multiple of 8. We use
2387 the least significant bit to record whether we have
2388 already generated the necessary reloc. */
2393 bfd_put_64 (output_bfd
, relocation
,
2394 htab
->sgot
->contents
+ off
);
2399 Elf_Internal_Rela outrel
;
2406 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2407 + htab
->sgot
->output_offset
2409 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2410 outrel
.r_addend
= relocation
;
2412 loc
+= s
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2413 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2416 local_got_offsets
[r_symndx
] |= 1;
2420 if (off
>= (bfd_vma
) -2)
2423 relocation
= htab
->sgot
->output_offset
+ off
;
2425 /* For @GOTENT the relocation is against the offset between
2426 the instruction and the symbols entry in the GOT and not
2427 between the start of the GOT and the symbols entry. We
2428 add the vma of the GOT to get the correct value. */
2429 if ( r_type
== R_390_GOTENT
2430 || r_type
== R_390_GOTPLTENT
)
2431 relocation
+= htab
->sgot
->output_section
->vma
;
2435 case R_390_GOTOFF16
:
2436 case R_390_GOTOFF32
:
2437 case R_390_GOTOFF64
:
2438 /* Relocation is relative to the start of the global offset
2441 /* Note that sgot->output_offset is not involved in this
2442 calculation. We always want the start of .got. If we
2443 defined _GLOBAL_OFFSET_TABLE in a different way, as is
2444 permitted by the ABI, we might have to change this
2446 relocation
-= htab
->sgot
->output_section
->vma
;
2450 case R_390_GOTPCDBL
:
2451 /* Use global offset table as symbol value. */
2452 relocation
= htab
->sgot
->output_section
->vma
;
2453 unresolved_reloc
= FALSE
;
2456 case R_390_PLT16DBL
:
2458 case R_390_PLT32DBL
:
2460 /* Relocation is to the entry for this symbol in the
2461 procedure linkage table. */
2463 /* Resolve a PLT32 reloc against a local symbol directly,
2464 without using the procedure linkage table. */
2468 if (h
->plt
.offset
== (bfd_vma
) -1
2469 || htab
->splt
== NULL
)
2471 /* We didn't make a PLT entry for this symbol. This
2472 happens when statically linking PIC code, or when
2473 using -Bsymbolic. */
2477 relocation
= (htab
->splt
->output_section
->vma
2478 + htab
->splt
->output_offset
2480 unresolved_reloc
= FALSE
;
2483 case R_390_PLTOFF16
:
2484 case R_390_PLTOFF32
:
2485 case R_390_PLTOFF64
:
2486 /* Relocation is to the entry for this symbol in the
2487 procedure linkage table relative to the start of the GOT. */
2489 /* For local symbols or if we didn't make a PLT entry for
2490 this symbol resolve the symbol directly. */
2492 || h
->plt
.offset
== (bfd_vma
) -1
2493 || htab
->splt
== NULL
)
2495 relocation
-= htab
->sgot
->output_section
->vma
;
2499 relocation
= (htab
->splt
->output_section
->vma
2500 + htab
->splt
->output_offset
2502 - htab
->sgot
->output_section
->vma
);
2503 unresolved_reloc
= FALSE
;
2515 /* r_symndx will be zero only for relocs against symbols
2516 from removed linkonce sections, or sections discarded by
2519 || (input_section
->flags
& SEC_ALLOC
) == 0)
2524 || ELF_ST_VISIBILITY (h
->other
) == STV_DEFAULT
2525 || h
->root
.type
!= bfd_link_hash_undefweak
)
2526 && ((r_type
!= R_390_PC16
2527 && r_type
!= R_390_PC16DBL
2528 && r_type
!= R_390_PC32
2529 && r_type
!= R_390_PC32DBL
2530 && r_type
!= R_390_PC64
)
2532 && !SYMBOL_REFERENCES_LOCAL (info
, h
))))
2533 || (ELIMINATE_COPY_RELOCS
2537 && (h
->elf_link_hash_flags
& ELF_LINK_NON_GOT_REF
) == 0
2538 && (((h
->elf_link_hash_flags
2539 & ELF_LINK_HASH_DEF_DYNAMIC
) != 0
2540 && (h
->elf_link_hash_flags
2541 & ELF_LINK_HASH_DEF_REGULAR
) == 0)
2542 || h
->root
.type
== bfd_link_hash_undefweak
2543 || h
->root
.type
== bfd_link_hash_undefined
)))
2545 Elf_Internal_Rela outrel
;
2546 bfd_boolean skip
, relocate
;
2550 /* When generating a shared object, these relocations
2551 are copied into the output file to be resolved at run
2557 _bfd_elf_section_offset (output_bfd
, info
, input_section
,
2559 if (outrel
.r_offset
== (bfd_vma
) -1)
2561 else if (outrel
.r_offset
== (bfd_vma
) -2)
2562 skip
= TRUE
, relocate
= TRUE
;
2564 outrel
.r_offset
+= (input_section
->output_section
->vma
2565 + input_section
->output_offset
);
2568 memset (&outrel
, 0, sizeof outrel
);
2571 && (r_type
== R_390_PC16
2572 || r_type
== R_390_PC16DBL
2573 || r_type
== R_390_PC32
2574 || r_type
== R_390_PC32DBL
2575 || r_type
== R_390_PC64
2578 || (h
->elf_link_hash_flags
2579 & ELF_LINK_HASH_DEF_REGULAR
) == 0))
2581 outrel
.r_info
= ELF64_R_INFO (h
->dynindx
, r_type
);
2582 outrel
.r_addend
= rel
->r_addend
;
2586 /* This symbol is local, or marked to become local. */
2587 outrel
.r_addend
= relocation
+ rel
->r_addend
;
2588 if (r_type
== R_390_64
)
2591 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2597 if (bfd_is_abs_section (sec
))
2599 else if (sec
== NULL
|| sec
->owner
== NULL
)
2601 bfd_set_error(bfd_error_bad_value
);
2608 osec
= sec
->output_section
;
2609 sindx
= elf_section_data (osec
)->dynindx
;
2610 BFD_ASSERT (sindx
> 0);
2612 /* We are turning this relocation into one
2613 against a section symbol, so subtract out
2614 the output section's address but not the
2615 offset of the input section in the output
2618 outrel
.r_addend
-= osec
->vma
;
2620 outrel
.r_info
= ELF64_R_INFO (sindx
, r_type
);
2624 sreloc
= elf_section_data (input_section
)->sreloc
;
2628 loc
= sreloc
->contents
;
2629 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2630 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2632 /* If this reloc is against an external symbol, we do
2633 not want to fiddle with the addend. Otherwise, we
2634 need to include the symbol value so that it becomes
2635 an addend for the dynamic reloc. */
2642 /* Relocations for tls literal pool entries. */
2643 case R_390_TLS_IE64
:
2646 Elf_Internal_Rela outrel
;
2650 outrel
.r_offset
= rel
->r_offset
2651 + input_section
->output_section
->vma
2652 + input_section
->output_offset
;
2653 outrel
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
2654 sreloc
= elf_section_data (input_section
)->sreloc
;
2657 loc
= sreloc
->contents
;
2658 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2659 bfd_elf64_swap_reloc_out (output_bfd
, &outrel
, loc
);
2663 case R_390_TLS_GD64
:
2664 case R_390_TLS_GOTIE64
:
2665 r_type
= elf_s390_tls_transition (info
, r_type
, h
== NULL
);
2666 tls_type
= GOT_UNKNOWN
;
2667 if (h
== NULL
&& local_got_offsets
)
2668 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2671 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2672 if (!info
->shared
&& h
->dynindx
== -1 && tls_type
>= GOT_TLS_IE
)
2673 r_type
= R_390_TLS_LE64
;
2675 if (r_type
== R_390_TLS_GD64
&& tls_type
>= GOT_TLS_IE
)
2676 r_type
= R_390_TLS_IE64
;
2678 if (r_type
== R_390_TLS_LE64
)
2680 /* This relocation gets optimized away by the local exec
2681 access optimization. */
2682 BFD_ASSERT (! unresolved_reloc
);
2683 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2684 contents
+ rel
->r_offset
);
2688 if (htab
->sgot
== NULL
)
2692 off
= h
->got
.offset
;
2695 if (local_got_offsets
== NULL
)
2698 off
= local_got_offsets
[r_symndx
];
2707 Elf_Internal_Rela outrel
;
2711 if (htab
->srelgot
== NULL
)
2714 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2715 + htab
->sgot
->output_offset
+ off
);
2717 indx
= h
&& h
->dynindx
!= -1 ? h
->dynindx
: 0;
2718 if (r_type
== R_390_TLS_GD64
)
2719 dr_type
= R_390_TLS_DTPMOD
;
2721 dr_type
= R_390_TLS_TPOFF
;
2722 if (dr_type
== R_390_TLS_TPOFF
&& indx
== 0)
2723 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2725 outrel
.r_addend
= 0;
2726 outrel
.r_info
= ELF64_R_INFO (indx
, dr_type
);
2727 loc
= htab
->srelgot
->contents
;
2728 loc
+= htab
->srelgot
->reloc_count
++
2729 * sizeof (Elf64_External_Rela
);
2730 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2732 if (r_type
== R_390_TLS_GD64
)
2736 BFD_ASSERT (! unresolved_reloc
);
2737 bfd_put_64 (output_bfd
,
2738 relocation
- dtpoff_base (info
),
2739 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2743 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_DTPOFF
);
2744 outrel
.r_offset
+= GOT_ENTRY_SIZE
;
2745 outrel
.r_addend
= 0;
2746 htab
->srelgot
->reloc_count
++;
2747 loc
+= sizeof (Elf64_External_Rela
);
2748 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2755 local_got_offsets
[r_symndx
] |= 1;
2758 if (off
>= (bfd_vma
) -2)
2760 if (r_type
== ELF64_R_TYPE (rel
->r_info
))
2762 relocation
= htab
->sgot
->output_offset
+ off
;
2763 if (r_type
== R_390_TLS_IE64
|| r_type
== R_390_TLS_IEENT
)
2764 relocation
+= htab
->sgot
->output_section
->vma
;
2765 unresolved_reloc
= FALSE
;
2769 bfd_put_64 (output_bfd
, htab
->sgot
->output_offset
+ off
,
2770 contents
+ rel
->r_offset
);
2775 case R_390_TLS_GOTIE12
:
2776 case R_390_TLS_GOTIE20
:
2777 case R_390_TLS_IEENT
:
2780 if (local_got_offsets
== NULL
)
2782 off
= local_got_offsets
[r_symndx
];
2784 goto emit_tls_relocs
;
2788 off
= h
->got
.offset
;
2789 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2790 if (info
->shared
|| h
->dynindx
!= -1 || tls_type
< GOT_TLS_IE
)
2791 goto emit_tls_relocs
;
2794 if (htab
->sgot
== NULL
)
2797 BFD_ASSERT (! unresolved_reloc
);
2798 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2799 htab
->sgot
->contents
+ off
);
2800 relocation
= htab
->sgot
->output_offset
+ off
;
2801 if (r_type
== R_390_TLS_IEENT
)
2802 relocation
+= htab
->sgot
->output_section
->vma
;
2803 unresolved_reloc
= FALSE
;
2806 case R_390_TLS_LDM64
:
2808 /* The literal pool entry this relocation refers to gets ignored
2809 by the optimized code of the local exec model. Do nothing
2810 and the value will turn out zero. */
2813 if (htab
->sgot
== NULL
)
2816 off
= htab
->tls_ldm_got
.offset
;
2821 Elf_Internal_Rela outrel
;
2824 if (htab
->srelgot
== NULL
)
2827 outrel
.r_offset
= (htab
->sgot
->output_section
->vma
2828 + htab
->sgot
->output_offset
+ off
);
2830 bfd_put_64 (output_bfd
, 0,
2831 htab
->sgot
->contents
+ off
+ GOT_ENTRY_SIZE
);
2832 outrel
.r_info
= ELF64_R_INFO (0, R_390_TLS_DTPMOD
);
2833 outrel
.r_addend
= 0;
2834 loc
= htab
->srelgot
->contents
;
2835 loc
+= htab
->srelgot
->reloc_count
++
2836 * sizeof (Elf64_External_Rela
);
2837 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2838 htab
->tls_ldm_got
.offset
|= 1;
2840 relocation
= htab
->sgot
->output_offset
+ off
;
2841 unresolved_reloc
= FALSE
;
2844 case R_390_TLS_LE64
:
2847 /* Linking a shared library with non-fpic code requires
2848 a R_390_TLS_TPOFF relocation. */
2849 Elf_Internal_Rela outrel
;
2854 outrel
.r_offset
= rel
->r_offset
2855 + input_section
->output_section
->vma
2856 + input_section
->output_offset
;
2857 if (h
!= NULL
&& h
->dynindx
!= -1)
2861 outrel
.r_info
= ELF64_R_INFO (indx
, R_390_TLS_TPOFF
);
2863 outrel
.r_addend
= relocation
- dtpoff_base (info
);
2865 outrel
.r_addend
= 0;
2866 sreloc
= elf_section_data (input_section
)->sreloc
;
2869 loc
= sreloc
->contents
;
2870 loc
+= sreloc
->reloc_count
++ * sizeof (Elf64_External_Rela
);
2871 bfd_elf64_swap_reloca_out (output_bfd
, &outrel
, loc
);
2875 BFD_ASSERT (! unresolved_reloc
);
2876 bfd_put_64 (output_bfd
, -tpoff (info
, relocation
),
2877 contents
+ rel
->r_offset
);
2881 case R_390_TLS_LDO64
:
2882 if (info
->shared
|| (input_section
->flags
& SEC_CODE
) == 0)
2883 relocation
-= dtpoff_base (info
);
2885 /* When converting LDO to LE, we must negate. */
2886 relocation
= -tpoff (info
, relocation
);
2889 /* Relocations for tls instructions. */
2890 case R_390_TLS_LOAD
:
2891 case R_390_TLS_GDCALL
:
2892 case R_390_TLS_LDCALL
:
2893 tls_type
= GOT_UNKNOWN
;
2894 if (h
== NULL
&& local_got_offsets
)
2895 tls_type
= elf_s390_local_got_tls_type (input_bfd
) [r_symndx
];
2897 tls_type
= elf_s390_hash_entry(h
)->tls_type
;
2899 if (tls_type
== GOT_TLS_GD
)
2902 if (r_type
== R_390_TLS_LOAD
)
2904 if (!info
->shared
&& (h
== NULL
|| h
->dynindx
== -1))
2906 /* IE->LE transition. Four valid cases:
2907 lg %rx,(0,%ry) -> sllg %rx,%ry,0
2908 lg %rx,(%ry,0) -> sllg %rx,%ry,0
2909 lg %rx,(%ry,%r12) -> sllg %rx,%ry,0
2910 lg %rx,(%r12,%ry) -> sllg %rx,%ry,0 */
2911 unsigned int insn0
, insn1
, ry
;
2913 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2914 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
2915 if (insn1
!= 0x0004)
2916 invalid_tls_insn (input_bfd
, input_section
, rel
);
2918 if ((insn0
& 0xff00f000) == 0xe3000000)
2919 /* lg %rx,0(%ry,0) -> sllg %rx,%ry,0 */
2920 ry
= (insn0
& 0x000f0000);
2921 else if ((insn0
& 0xff0f0000) == 0xe3000000)
2922 /* lg %rx,0(0,%ry) -> sllg %rx,%ry,0 */
2923 ry
= (insn0
& 0x0000f000) << 4;
2924 else if ((insn0
& 0xff00f000) == 0xe300c000)
2925 /* lg %rx,0(%ry,%r12) -> sllg %rx,%ry,0 */
2926 ry
= (insn0
& 0x000f0000);
2927 else if ((insn0
& 0xff0f0000) == 0xe30c0000)
2928 /* lg %rx,0(%r12,%ry) -> sllg %rx,%ry,0 */
2929 ry
= (insn0
& 0x0000f000) << 4;
2931 invalid_tls_insn (input_bfd
, input_section
, rel
);
2932 insn0
= 0xeb000000 | (insn0
& 0x00f00000) | ry
;
2934 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
2935 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
2938 else if (r_type
== R_390_TLS_GDCALL
)
2940 unsigned int insn0
, insn1
;
2942 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2943 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
2944 if ((insn0
& 0xffff0000) != 0xc0e50000)
2945 invalid_tls_insn (input_bfd
, input_section
, rel
);
2946 if (!info
->shared
&& (h
== NULL
|| h
->dynindx
== -1))
2948 /* GD->LE transition.
2949 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2955 /* GD->IE transition.
2956 brasl %r14,__tls_get_addr@plt -> lg %r2,0(%r2,%r12) */
2960 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
2961 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
2963 else if (r_type
== R_390_TLS_LDCALL
)
2967 unsigned int insn0
, insn1
;
2969 insn0
= bfd_get_32 (input_bfd
, contents
+ rel
->r_offset
);
2970 insn1
= bfd_get_16 (input_bfd
, contents
+ rel
->r_offset
+ 4);
2971 if ((insn0
& 0xffff0000) != 0xc0e50000)
2972 invalid_tls_insn (input_bfd
, input_section
, rel
);
2973 /* LD->LE transition.
2974 brasl %r14,__tls_get_addr@plt -> brcl 0,. */
2977 bfd_put_32 (output_bfd
, insn0
, contents
+ rel
->r_offset
);
2978 bfd_put_16 (output_bfd
, insn1
, contents
+ rel
->r_offset
+ 4);
2987 /* Dynamic relocs are not propagated for SEC_DEBUGGING sections
2988 because such sections are not SEC_ALLOC and thus ld.so will
2989 not process them. */
2990 if (unresolved_reloc
2991 && !((input_section
->flags
& SEC_DEBUGGING
) != 0
2992 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_DYNAMIC
) != 0))
2993 (*_bfd_error_handler
)
2994 (_("%s(%s+0x%lx): unresolvable relocation against symbol `%s'"),
2995 bfd_archive_filename (input_bfd
),
2996 bfd_get_section_name (input_bfd
, input_section
),
2997 (long) rel
->r_offset
,
2998 h
->root
.root
.string
);
3000 if (r_type
== R_390_20
3001 || r_type
== R_390_GOT20
3002 || r_type
== R_390_GOTPLT20
3003 || r_type
== R_390_TLS_GOTIE20
)
3005 relocation
+= rel
->r_addend
;
3006 relocation
= (relocation
&0xfff) << 8 | (relocation
&0xff000) >> 12;
3007 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3008 contents
, rel
->r_offset
,
3012 r
= _bfd_final_link_relocate (howto
, input_bfd
, input_section
,
3013 contents
, rel
->r_offset
,
3014 relocation
, rel
->r_addend
);
3016 if (r
!= bfd_reloc_ok
)
3021 name
= h
->root
.root
.string
;
3024 name
= bfd_elf_string_from_elf_section (input_bfd
,
3025 symtab_hdr
->sh_link
,
3030 name
= bfd_section_name (input_bfd
, sec
);
3033 if (r
== bfd_reloc_overflow
)
3036 if (! ((*info
->callbacks
->reloc_overflow
)
3037 (info
, name
, howto
->name
, (bfd_vma
) 0,
3038 input_bfd
, input_section
, rel
->r_offset
)))
3043 (*_bfd_error_handler
)
3044 (_("%s(%s+0x%lx): reloc against `%s': error %d"),
3045 bfd_archive_filename (input_bfd
),
3046 bfd_get_section_name (input_bfd
, input_section
),
3047 (long) rel
->r_offset
, name
, (int) r
);
3056 /* Finish up dynamic symbol handling. We set the contents of various
3057 dynamic sections here. */
3060 elf_s390_finish_dynamic_symbol (output_bfd
, info
, h
, sym
)
3062 struct bfd_link_info
*info
;
3063 struct elf_link_hash_entry
*h
;
3064 Elf_Internal_Sym
*sym
;
3066 struct elf_s390_link_hash_table
*htab
;
3068 htab
= elf_s390_hash_table (info
);
3070 if (h
->plt
.offset
!= (bfd_vma
) -1)
3074 Elf_Internal_Rela rela
;
3077 /* This symbol has an entry in the procedure linkage table. Set
3080 if (h
->dynindx
== -1
3081 || htab
->splt
== NULL
3082 || htab
->sgotplt
== NULL
3083 || htab
->srelplt
== NULL
)
3087 Current offset - size first entry / entry size. */
3088 plt_index
= (h
->plt
.offset
- PLT_FIRST_ENTRY_SIZE
) / PLT_ENTRY_SIZE
;
3090 /* Offset in GOT is PLT index plus GOT headers(3) times 8,
3092 got_offset
= (plt_index
+ 3) * GOT_ENTRY_SIZE
;
3094 /* Fill in the blueprint of a PLT. */
3095 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD0
,
3096 htab
->splt
->contents
+ h
->plt
.offset
);
3097 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD1
,
3098 htab
->splt
->contents
+ h
->plt
.offset
+ 4);
3099 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD2
,
3100 htab
->splt
->contents
+ h
->plt
.offset
+ 8);
3101 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD3
,
3102 htab
->splt
->contents
+ h
->plt
.offset
+ 12);
3103 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD4
,
3104 htab
->splt
->contents
+ h
->plt
.offset
+ 16);
3105 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD5
,
3106 htab
->splt
->contents
+ h
->plt
.offset
+ 20);
3107 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD6
,
3108 htab
->splt
->contents
+ h
->plt
.offset
+ 24);
3109 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_ENTRY_WORD7
,
3110 htab
->splt
->contents
+ h
->plt
.offset
+ 28);
3111 /* Fixup the relative address to the GOT entry */
3112 bfd_put_32 (output_bfd
,
3113 (htab
->sgotplt
->output_section
->vma
+
3114 htab
->sgotplt
->output_offset
+ got_offset
3115 - (htab
->splt
->output_section
->vma
+ h
->plt
.offset
))/2,
3116 htab
->splt
->contents
+ h
->plt
.offset
+ 2);
3117 /* Fixup the relative branch to PLT 0 */
3118 bfd_put_32 (output_bfd
, - (PLT_FIRST_ENTRY_SIZE
+
3119 (PLT_ENTRY_SIZE
* plt_index
) + 22)/2,
3120 htab
->splt
->contents
+ h
->plt
.offset
+ 24);
3121 /* Fixup offset into symbol table */
3122 bfd_put_32 (output_bfd
, plt_index
* sizeof (Elf64_External_Rela
),
3123 htab
->splt
->contents
+ h
->plt
.offset
+ 28);
3125 /* Fill in the entry in the global offset table.
3126 Points to instruction after GOT offset. */
3127 bfd_put_64 (output_bfd
,
3128 (htab
->splt
->output_section
->vma
3129 + htab
->splt
->output_offset
3132 htab
->sgotplt
->contents
+ got_offset
);
3134 /* Fill in the entry in the .rela.plt section. */
3135 rela
.r_offset
= (htab
->sgotplt
->output_section
->vma
3136 + htab
->sgotplt
->output_offset
3138 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_JMP_SLOT
);
3140 loc
= htab
->srelplt
->contents
+ plt_index
* sizeof (Elf64_External_Rela
);
3141 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3143 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
) == 0)
3145 /* Mark the symbol as undefined, rather than as defined in
3146 the .plt section. Leave the value alone. This is a clue
3147 for the dynamic linker, to make function pointer
3148 comparisons work between an application and shared
3150 sym
->st_shndx
= SHN_UNDEF
;
3154 if (h
->got
.offset
!= (bfd_vma
) -1
3155 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_GD
3156 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE
3157 && elf_s390_hash_entry(h
)->tls_type
!= GOT_TLS_IE_NLT
)
3159 Elf_Internal_Rela rela
;
3162 /* This symbol has an entry in the global offset table. Set it
3164 if (htab
->sgot
== NULL
|| htab
->srelgot
== NULL
)
3167 rela
.r_offset
= (htab
->sgot
->output_section
->vma
3168 + htab
->sgot
->output_offset
3169 + (h
->got
.offset
&~ (bfd_vma
) 1));
3171 /* If this is a static link, or it is a -Bsymbolic link and the
3172 symbol is defined locally or was forced to be local because
3173 of a version file, we just want to emit a RELATIVE reloc.
3174 The entry in the global offset table will already have been
3175 initialized in the relocate_section function. */
3179 || (h
->elf_link_hash_flags
& ELF_LINK_FORCED_LOCAL
))
3180 && (h
->elf_link_hash_flags
& ELF_LINK_HASH_DEF_REGULAR
))
3182 BFD_ASSERT((h
->got
.offset
& 1) != 0);
3183 rela
.r_info
= ELF64_R_INFO (0, R_390_RELATIVE
);
3184 rela
.r_addend
= (h
->root
.u
.def
.value
3185 + h
->root
.u
.def
.section
->output_section
->vma
3186 + h
->root
.u
.def
.section
->output_offset
);
3190 BFD_ASSERT((h
->got
.offset
& 1) == 0);
3191 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgot
->contents
+ h
->got
.offset
);
3192 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_GLOB_DAT
);
3196 loc
= htab
->srelgot
->contents
;
3197 loc
+= htab
->srelgot
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3198 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3201 if ((h
->elf_link_hash_flags
& ELF_LINK_HASH_NEEDS_COPY
) != 0)
3203 Elf_Internal_Rela rela
;
3206 /* This symbols needs a copy reloc. Set it up. */
3208 if (h
->dynindx
== -1
3209 || (h
->root
.type
!= bfd_link_hash_defined
3210 && h
->root
.type
!= bfd_link_hash_defweak
)
3211 || htab
->srelbss
== NULL
)
3214 rela
.r_offset
= (h
->root
.u
.def
.value
3215 + h
->root
.u
.def
.section
->output_section
->vma
3216 + h
->root
.u
.def
.section
->output_offset
);
3217 rela
.r_info
= ELF64_R_INFO (h
->dynindx
, R_390_COPY
);
3219 loc
= htab
->srelbss
->contents
;
3220 loc
+= htab
->srelbss
->reloc_count
++ * sizeof (Elf64_External_Rela
);
3221 bfd_elf64_swap_reloca_out (output_bfd
, &rela
, loc
);
3224 /* Mark some specially defined symbols as absolute. */
3225 if (strcmp (h
->root
.root
.string
, "_DYNAMIC") == 0
3226 || strcmp (h
->root
.root
.string
, "_GLOBAL_OFFSET_TABLE_") == 0
3227 || strcmp (h
->root
.root
.string
, "_PROCEDURE_LINKAGE_TABLE_") == 0)
3228 sym
->st_shndx
= SHN_ABS
;
3233 /* Used to decide how to sort relocs in an optimal manner for the
3234 dynamic linker, before writing them out. */
3236 static enum elf_reloc_type_class
3237 elf_s390_reloc_type_class (rela
)
3238 const Elf_Internal_Rela
*rela
;
3240 switch ((int) ELF64_R_TYPE (rela
->r_info
))
3242 case R_390_RELATIVE
:
3243 return reloc_class_relative
;
3244 case R_390_JMP_SLOT
:
3245 return reloc_class_plt
;
3247 return reloc_class_copy
;
3249 return reloc_class_normal
;
3253 /* Finish up the dynamic sections. */
3256 elf_s390_finish_dynamic_sections (output_bfd
, info
)
3258 struct bfd_link_info
*info
;
3260 struct elf_s390_link_hash_table
*htab
;
3264 htab
= elf_s390_hash_table (info
);
3265 dynobj
= htab
->elf
.dynobj
;
3266 sdyn
= bfd_get_section_by_name (dynobj
, ".dynamic");
3268 if (htab
->elf
.dynamic_sections_created
)
3270 Elf64_External_Dyn
*dyncon
, *dynconend
;
3272 if (sdyn
== NULL
|| htab
->sgot
== NULL
)
3275 dyncon
= (Elf64_External_Dyn
*) sdyn
->contents
;
3276 dynconend
= (Elf64_External_Dyn
*) (sdyn
->contents
+ sdyn
->size
);
3277 for (; dyncon
< dynconend
; dyncon
++)
3279 Elf_Internal_Dyn dyn
;
3282 bfd_elf64_swap_dyn_in (dynobj
, dyncon
, &dyn
);
3290 dyn
.d_un
.d_ptr
= htab
->sgot
->output_section
->vma
;
3294 dyn
.d_un
.d_ptr
= htab
->srelplt
->output_section
->vma
;
3298 s
= htab
->srelplt
->output_section
;
3299 dyn
.d_un
.d_val
= s
->size
;
3303 /* The procedure linkage table relocs (DT_JMPREL) should
3304 not be included in the overall relocs (DT_RELA).
3305 Therefore, we override the DT_RELASZ entry here to
3306 make it not include the JMPREL relocs. Since the
3307 linker script arranges for .rela.plt to follow all
3308 other relocation sections, we don't have to worry
3309 about changing the DT_RELA entry. */
3310 s
= htab
->srelplt
->output_section
;
3311 dyn
.d_un
.d_val
-= s
->size
;
3315 bfd_elf64_swap_dyn_out (output_bfd
, &dyn
, dyncon
);
3318 /* Fill in the special first entry in the procedure linkage table. */
3319 if (htab
->splt
&& htab
->splt
->size
> 0)
3321 /* fill in blueprint for plt 0 entry */
3322 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_FIRST_ENTRY_WORD0
,
3323 htab
->splt
->contents
);
3324 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_FIRST_ENTRY_WORD1
,
3325 htab
->splt
->contents
+4 );
3326 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_FIRST_ENTRY_WORD3
,
3327 htab
->splt
->contents
+12 );
3328 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_FIRST_ENTRY_WORD4
,
3329 htab
->splt
->contents
+16 );
3330 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_FIRST_ENTRY_WORD5
,
3331 htab
->splt
->contents
+20 );
3332 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_FIRST_ENTRY_WORD6
,
3333 htab
->splt
->contents
+ 24);
3334 bfd_put_32 (output_bfd
, (bfd_vma
) PLT_FIRST_ENTRY_WORD7
,
3335 htab
->splt
->contents
+ 28 );
3336 /* Fixup relative address to start of GOT */
3337 bfd_put_32 (output_bfd
,
3338 (htab
->sgotplt
->output_section
->vma
+
3339 htab
->sgotplt
->output_offset
3340 - htab
->splt
->output_section
->vma
- 6)/2,
3341 htab
->splt
->contents
+ 8);
3343 elf_section_data (htab
->splt
->output_section
)
3344 ->this_hdr
.sh_entsize
= PLT_ENTRY_SIZE
;
3349 /* Fill in the first three entries in the global offset table. */
3350 if (htab
->sgotplt
->size
> 0)
3352 bfd_put_64 (output_bfd
,
3353 (sdyn
== NULL
? (bfd_vma
) 0
3354 : sdyn
->output_section
->vma
+ sdyn
->output_offset
),
3355 htab
->sgotplt
->contents
);
3356 /* One entry for shared object struct ptr. */
3357 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ 8);
3358 /* One entry for _dl_runtime_resolve. */
3359 bfd_put_64 (output_bfd
, (bfd_vma
) 0, htab
->sgotplt
->contents
+ 12);
3362 elf_section_data (htab
->sgot
->output_section
)
3363 ->this_hdr
.sh_entsize
= 8;
3368 /* Return address for Ith PLT stub in section PLT, for relocation REL
3369 or (bfd_vma) -1 if it should not be included. */
3372 elf_s390_plt_sym_val (bfd_vma i
, const asection
*plt
,
3373 const arelent
*rel ATTRIBUTE_UNUSED
)
3375 return plt
->vma
+ PLT_FIRST_ENTRY_SIZE
+ i
* PLT_ENTRY_SIZE
;
3379 /* Why was the hash table entry size definition changed from
3380 ARCH_SIZE/8 to 4? This breaks the 64 bit dynamic linker and
3381 this is the only reason for the s390_elf64_size_info structure. */
3383 const struct elf_size_info s390_elf64_size_info
=
3385 sizeof (Elf64_External_Ehdr
),
3386 sizeof (Elf64_External_Phdr
),
3387 sizeof (Elf64_External_Shdr
),
3388 sizeof (Elf64_External_Rel
),
3389 sizeof (Elf64_External_Rela
),
3390 sizeof (Elf64_External_Sym
),
3391 sizeof (Elf64_External_Dyn
),
3392 sizeof (Elf_External_Note
),
3393 8, /* hash-table entry size. */
3394 1, /* internal relocations per external relocations. */
3395 64, /* arch_size. */
3396 3, /* log_file_align. */
3397 ELFCLASS64
, EV_CURRENT
,
3398 bfd_elf64_write_out_phdrs
,
3399 bfd_elf64_write_shdrs_and_ehdr
,
3400 bfd_elf64_write_relocs
,
3401 bfd_elf64_swap_symbol_in
,
3402 bfd_elf64_swap_symbol_out
,
3403 bfd_elf64_slurp_reloc_table
,
3404 bfd_elf64_slurp_symbol_table
,
3405 bfd_elf64_swap_dyn_in
,
3406 bfd_elf64_swap_dyn_out
,
3407 bfd_elf64_swap_reloc_in
,
3408 bfd_elf64_swap_reloc_out
,
3409 bfd_elf64_swap_reloca_in
,
3410 bfd_elf64_swap_reloca_out
3413 #define TARGET_BIG_SYM bfd_elf64_s390_vec
3414 #define TARGET_BIG_NAME "elf64-s390"
3415 #define ELF_ARCH bfd_arch_s390
3416 #define ELF_MACHINE_CODE EM_S390
3417 #define ELF_MACHINE_ALT1 EM_S390_OLD
3418 #define ELF_MAXPAGESIZE 0x1000
3420 #define elf_backend_size_info s390_elf64_size_info
3422 #define elf_backend_can_gc_sections 1
3423 #define elf_backend_can_refcount 1
3424 #define elf_backend_want_got_plt 1
3425 #define elf_backend_plt_readonly 1
3426 #define elf_backend_want_plt_sym 0
3427 #define elf_backend_got_header_size 24
3428 #define elf_backend_rela_normal 1
3430 #define elf_info_to_howto elf_s390_info_to_howto
3432 #define bfd_elf64_bfd_is_local_label_name elf_s390_is_local_label_name
3433 #define bfd_elf64_bfd_link_hash_table_create elf_s390_link_hash_table_create
3434 #define bfd_elf64_bfd_reloc_type_lookup elf_s390_reloc_type_lookup
3436 #define elf_backend_adjust_dynamic_symbol elf_s390_adjust_dynamic_symbol
3437 #define elf_backend_check_relocs elf_s390_check_relocs
3438 #define elf_backend_copy_indirect_symbol elf_s390_copy_indirect_symbol
3439 #define elf_backend_create_dynamic_sections elf_s390_create_dynamic_sections
3440 #define elf_backend_finish_dynamic_sections elf_s390_finish_dynamic_sections
3441 #define elf_backend_finish_dynamic_symbol elf_s390_finish_dynamic_symbol
3442 #define elf_backend_gc_mark_hook elf_s390_gc_mark_hook
3443 #define elf_backend_gc_sweep_hook elf_s390_gc_sweep_hook
3444 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3445 #define elf_backend_relocate_section elf_s390_relocate_section
3446 #define elf_backend_size_dynamic_sections elf_s390_size_dynamic_sections
3447 #define elf_backend_reloc_type_class elf_s390_reloc_type_class
3448 #define elf_backend_plt_sym_val elf_s390_plt_sym_val
3450 #define bfd_elf64_mkobject elf_s390_mkobject
3451 #define elf_backend_object_p elf_s390_object_p
3453 #include "elf64-target.h"