Commit | Line | Data |
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252b5132 | 1 | /* Intel 80386/80486-specific support for 32-bit ELF |
b2a8e766 | 2 | Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002, |
0ffa91dd | 3 | 2003, 2004, 2005, 2006, 2007, 2008 Free Software Foundation, Inc. |
252b5132 | 4 | |
571fe01f | 5 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 6 | |
571fe01f NC |
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 | |
cd123cb7 | 9 | the Free Software Foundation; either version 3 of the License, or |
571fe01f | 10 | (at your option) any later version. |
252b5132 | 11 | |
571fe01f NC |
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. | |
252b5132 | 16 | |
571fe01f NC |
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 | |
cd123cb7 NC |
19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
20 | MA 02110-1301, USA. */ | |
252b5132 | 21 | |
252b5132 | 22 | #include "sysdep.h" |
3db64b00 | 23 | #include "bfd.h" |
252b5132 RH |
24 | #include "bfdlink.h" |
25 | #include "libbfd.h" | |
26 | #include "elf-bfd.h" | |
eac338cf | 27 | #include "elf-vxworks.h" |
142411ca | 28 | #include "bfd_stdint.h" |
c25bc9fc L |
29 | #include "objalloc.h" |
30 | #include "hashtab.h" | |
252b5132 | 31 | |
55fd94b0 AM |
32 | /* 386 uses REL relocations instead of RELA. */ |
33 | #define USE_REL 1 | |
252b5132 RH |
34 | |
35 | #include "elf/i386.h" | |
36 | ||
37 | static reloc_howto_type elf_howto_table[]= | |
38 | { | |
b34976b6 | 39 | HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield, |
1b452ec6 | 40 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
41 | TRUE, 0x00000000, 0x00000000, FALSE), |
42 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 43 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
44 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
45 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 46 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
47 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
48 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 49 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
50 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
51 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 52 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
53 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
54 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 55 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
56 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
57 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 58 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
59 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
60 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 61 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
62 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
63 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 64 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
65 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
66 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 67 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
68 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
69 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 70 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 71 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 72 | |
dc47f327 AM |
73 | /* We have a gap in the reloc numbers here. |
74 | R_386_standard counts the number up to this point, and | |
75 | R_386_ext_offset is the value to subtract from a reloc type of | |
76 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
77 | #define R_386_standard (R_386_GOTPC + 1) |
78 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 79 | |
37e55690 | 80 | /* These relocs are a GNU extension. */ |
b34976b6 | 81 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 82 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
83 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
84 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 85 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
86 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
87 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 88 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
89 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
90 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 91 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
92 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
93 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 94 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
95 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
96 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 97 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
98 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
99 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 100 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 101 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 102 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 103 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
104 | TRUE, 0xffff, 0xffff, TRUE), |
105 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 106 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
107 | TRUE, 0xff, 0xff, FALSE), |
108 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 109 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 110 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 111 | |
55fd94b0 AM |
112 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
113 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 114 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 115 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 116 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
117 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
118 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 119 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
120 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
121 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 122 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
123 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
124 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 125 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
126 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
127 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 128 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
129 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
130 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 131 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 132 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
67a4f2b7 AO |
133 | EMPTY_HOWTO (38), |
134 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
135 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
136 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
137 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
138 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
139 | FALSE, 0, 0, FALSE), | |
140 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
141 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
142 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
143 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
144 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
145 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
146 | |
147 | /* Another gap. */ | |
cbe950e9 L |
148 | #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset) |
149 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative) | |
252b5132 RH |
150 | |
151 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
152 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
153 | 0, /* rightshift */ | |
154 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
155 | 0, /* bitsize */ | |
b34976b6 | 156 | FALSE, /* pc_relative */ |
252b5132 RH |
157 | 0, /* bitpos */ |
158 | complain_overflow_dont, /* complain_on_overflow */ | |
159 | NULL, /* special_function */ | |
160 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 161 | FALSE, /* partial_inplace */ |
252b5132 RH |
162 | 0, /* src_mask */ |
163 | 0, /* dst_mask */ | |
b34976b6 | 164 | FALSE), /* pcrel_offset */ |
252b5132 RH |
165 | |
166 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
167 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
168 | 0, /* rightshift */ | |
169 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
170 | 0, /* bitsize */ | |
b34976b6 | 171 | FALSE, /* pc_relative */ |
252b5132 RH |
172 | 0, /* bitpos */ |
173 | complain_overflow_dont, /* complain_on_overflow */ | |
174 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
175 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 176 | FALSE, /* partial_inplace */ |
252b5132 RH |
177 | 0, /* src_mask */ |
178 | 0, /* dst_mask */ | |
b34976b6 | 179 | FALSE) /* pcrel_offset */ |
dc47f327 | 180 | |
55fd94b0 | 181 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
182 | |
183 | }; | |
184 | ||
252b5132 | 185 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
186 | #define TRACE(str) \ |
187 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
188 | #else |
189 | #define TRACE(str) | |
190 | #endif | |
191 | ||
192 | static reloc_howto_type * | |
55fd94b0 AM |
193 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
194 | bfd_reloc_code_real_type code) | |
252b5132 RH |
195 | { |
196 | switch (code) | |
197 | { | |
198 | case BFD_RELOC_NONE: | |
199 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 200 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
201 | |
202 | case BFD_RELOC_32: | |
203 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 204 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
205 | |
206 | case BFD_RELOC_CTOR: | |
207 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 208 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
209 | |
210 | case BFD_RELOC_32_PCREL: | |
211 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 212 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
213 | |
214 | case BFD_RELOC_386_GOT32: | |
215 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 216 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
217 | |
218 | case BFD_RELOC_386_PLT32: | |
219 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 220 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
221 | |
222 | case BFD_RELOC_386_COPY: | |
223 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 224 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
225 | |
226 | case BFD_RELOC_386_GLOB_DAT: | |
227 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 228 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
229 | |
230 | case BFD_RELOC_386_JUMP_SLOT: | |
231 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 232 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
233 | |
234 | case BFD_RELOC_386_RELATIVE: | |
235 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 236 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
237 | |
238 | case BFD_RELOC_386_GOTOFF: | |
239 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 240 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
241 | |
242 | case BFD_RELOC_386_GOTPC: | |
243 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 244 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 245 | |
37e55690 JJ |
246 | /* These relocs are a GNU extension. */ |
247 | case BFD_RELOC_386_TLS_TPOFF: | |
248 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 249 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
250 | |
251 | case BFD_RELOC_386_TLS_IE: | |
252 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 253 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
254 | |
255 | case BFD_RELOC_386_TLS_GOTIE: | |
256 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 257 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 258 | |
13ae64f3 JJ |
259 | case BFD_RELOC_386_TLS_LE: |
260 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 261 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
262 | |
263 | case BFD_RELOC_386_TLS_GD: | |
264 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 265 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
266 | |
267 | case BFD_RELOC_386_TLS_LDM: | |
268 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 269 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 270 | |
252b5132 RH |
271 | case BFD_RELOC_16: |
272 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 273 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
274 | |
275 | case BFD_RELOC_16_PCREL: | |
276 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 277 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
278 | |
279 | case BFD_RELOC_8: | |
280 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 281 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
282 | |
283 | case BFD_RELOC_8_PCREL: | |
284 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 285 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 286 | |
13ae64f3 JJ |
287 | /* Common with Sun TLS implementation. */ |
288 | case BFD_RELOC_386_TLS_LDO_32: | |
289 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 290 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
291 | |
292 | case BFD_RELOC_386_TLS_IE_32: | |
293 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 294 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
295 | |
296 | case BFD_RELOC_386_TLS_LE_32: | |
297 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 298 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
299 | |
300 | case BFD_RELOC_386_TLS_DTPMOD32: | |
301 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 302 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
303 | |
304 | case BFD_RELOC_386_TLS_DTPOFF32: | |
305 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 306 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
307 | |
308 | case BFD_RELOC_386_TLS_TPOFF32: | |
309 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 310 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 311 | |
67a4f2b7 AO |
312 | case BFD_RELOC_386_TLS_GOTDESC: |
313 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
314 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
315 | ||
316 | case BFD_RELOC_386_TLS_DESC_CALL: | |
317 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
318 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
319 | ||
320 | case BFD_RELOC_386_TLS_DESC: | |
321 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
322 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
323 | ||
cbe950e9 L |
324 | case BFD_RELOC_386_IRELATIVE: |
325 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
326 | return &elf_howto_table[R_386_IRELATIVE]; | |
327 | ||
252b5132 RH |
328 | case BFD_RELOC_VTABLE_INHERIT: |
329 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 330 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
331 | |
332 | case BFD_RELOC_VTABLE_ENTRY: | |
333 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 334 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
335 | |
336 | default: | |
337 | break; | |
338 | } | |
339 | ||
340 | TRACE ("Unknown"); | |
341 | return 0; | |
342 | } | |
343 | ||
157090f7 AM |
344 | static reloc_howto_type * |
345 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
346 | const char *r_name) | |
347 | { | |
348 | unsigned int i; | |
349 | ||
350 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
351 | if (elf_howto_table[i].name != NULL | |
352 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
353 | return &elf_howto_table[i]; | |
354 | ||
355 | return NULL; | |
356 | } | |
357 | ||
142411ca L |
358 | static reloc_howto_type * |
359 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 360 | { |
dc47f327 AM |
361 | unsigned int indx; |
362 | ||
363 | if ((indx = r_type) >= R_386_standard | |
364 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
365 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 366 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
cbe950e9 L |
367 | >= R_386_irelative - R_386_ext) |
368 | && ((indx = r_type - R_386_vt_offset) - R_386_irelative | |
369 | >= R_386_vt - R_386_irelative)) | |
252b5132 | 370 | { |
d003868e AM |
371 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
372 | abfd, (int) r_type); | |
55fd94b0 | 373 | indx = R_386_NONE; |
252b5132 | 374 | } |
142411ca L |
375 | BFD_ASSERT (elf_howto_table [indx].type == r_type); |
376 | return &elf_howto_table[indx]; | |
377 | } | |
378 | ||
379 | static void | |
380 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
381 | arelent *cache_ptr, | |
382 | Elf_Internal_Rela *dst) | |
383 | { | |
384 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
385 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
386 | } |
387 | ||
388 | /* Return whether a symbol name implies a local label. The UnixWare | |
389 | 2.1 cc generates temporary symbols that start with .X, so we | |
390 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
391 | If so, we should move the .X recognition into | |
392 | _bfd_elf_is_local_label_name. */ | |
393 | ||
b34976b6 | 394 | static bfd_boolean |
55fd94b0 | 395 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
396 | { |
397 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 398 | return TRUE; |
252b5132 RH |
399 | |
400 | return _bfd_elf_is_local_label_name (abfd, name); | |
401 | } | |
402 | \f | |
38701953 | 403 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 404 | |
b34976b6 | 405 | static bfd_boolean |
55fd94b0 | 406 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
407 | { |
408 | int offset; | |
eea6121a | 409 | size_t size; |
38701953 | 410 | |
61adc1a4 | 411 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 412 | { |
61adc1a4 NC |
413 | int pr_version = bfd_get_32 (abfd, note->descdata); |
414 | ||
415 | if (pr_version != 1) | |
416 | return FALSE; | |
417 | ||
418 | /* pr_cursig */ | |
419 | elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20); | |
420 | ||
421 | /* pr_pid */ | |
422 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
423 | ||
424 | /* pr_reg */ | |
425 | offset = 28; | |
eea6121a | 426 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
427 | } |
428 | else | |
429 | { | |
430 | switch (note->descsz) | |
431 | { | |
432 | default: | |
433 | return FALSE; | |
38701953 | 434 | |
61adc1a4 NC |
435 | case 144: /* Linux/i386 */ |
436 | /* pr_cursig */ | |
437 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
38701953 | 438 | |
61adc1a4 NC |
439 | /* pr_pid */ |
440 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
38701953 | 441 | |
61adc1a4 NC |
442 | /* pr_reg */ |
443 | offset = 72; | |
eea6121a | 444 | size = 68; |
38701953 | 445 | |
61adc1a4 NC |
446 | break; |
447 | } | |
38701953 AM |
448 | } |
449 | ||
450 | /* Make a ".reg/999" section. */ | |
451 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 452 | size, note->descpos + offset); |
38701953 AM |
453 | } |
454 | ||
b34976b6 | 455 | static bfd_boolean |
55fd94b0 | 456 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 457 | { |
61adc1a4 | 458 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 459 | { |
61adc1a4 NC |
460 | int pr_version = bfd_get_32 (abfd, note->descdata); |
461 | ||
462 | if (pr_version != 1) | |
b34976b6 | 463 | return FALSE; |
38701953 | 464 | |
61adc1a4 NC |
465 | elf_tdata (abfd)->core_program |
466 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); | |
467 | elf_tdata (abfd)->core_command | |
468 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); | |
469 | } | |
470 | else | |
471 | { | |
472 | switch (note->descsz) | |
473 | { | |
474 | default: | |
475 | return FALSE; | |
476 | ||
477 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
478 | elf_tdata (abfd)->core_program | |
479 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
480 | elf_tdata (abfd)->core_command | |
481 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
482 | } | |
38701953 AM |
483 | } |
484 | ||
485 | /* Note that for some reason, a spurious space is tacked | |
486 | onto the end of the args in some (at least one anyway) | |
487 | implementations, so strip it off if it exists. */ | |
38701953 AM |
488 | { |
489 | char *command = elf_tdata (abfd)->core_command; | |
490 | int n = strlen (command); | |
491 | ||
492 | if (0 < n && command[n - 1] == ' ') | |
493 | command[n - 1] = '\0'; | |
494 | } | |
495 | ||
b34976b6 | 496 | return TRUE; |
38701953 AM |
497 | } |
498 | \f | |
499 | /* Functions for the i386 ELF linker. | |
500 | ||
501 | In order to gain some understanding of code in this file without | |
502 | knowing all the intricate details of the linker, note the | |
503 | following: | |
504 | ||
505 | Functions named elf_i386_* are called by external routines, other | |
506 | functions are only called locally. elf_i386_* functions appear | |
507 | in this file more or less in the order in which they are called | |
508 | from external routines. eg. elf_i386_check_relocs is called | |
509 | early in the link process, elf_i386_finish_dynamic_sections is | |
510 | one of the last functions. */ | |
511 | ||
252b5132 RH |
512 | |
513 | /* The name of the dynamic interpreter. This is put in the .interp | |
514 | section. */ | |
515 | ||
516 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
517 | ||
a23b6845 AM |
518 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
519 | copying dynamic variables from a shared lib into an app's dynbss | |
520 | section, and instead use a dynamic relocation to point into the | |
521 | shared lib. */ | |
522 | #define ELIMINATE_COPY_RELOCS 1 | |
523 | ||
252b5132 RH |
524 | /* The size in bytes of an entry in the procedure linkage table. */ |
525 | ||
526 | #define PLT_ENTRY_SIZE 16 | |
527 | ||
528 | /* The first entry in an absolute procedure linkage table looks like | |
eac338cf PB |
529 | this. See the SVR4 ABI i386 supplement to see how this works. |
530 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 531 | |
eac338cf | 532 | static const bfd_byte elf_i386_plt0_entry[12] = |
252b5132 RH |
533 | { |
534 | 0xff, 0x35, /* pushl contents of address */ | |
535 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
536 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 537 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
538 | }; |
539 | ||
540 | /* Subsequent entries in an absolute procedure linkage table look like | |
541 | this. */ | |
542 | ||
543 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
544 | { | |
545 | 0xff, 0x25, /* jmp indirect */ | |
546 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
547 | 0x68, /* pushl immediate */ | |
548 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
549 | 0xe9, /* jmp relative */ | |
550 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
551 | }; | |
552 | ||
eac338cf PB |
553 | /* The first entry in a PIC procedure linkage table look like this. |
554 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 555 | |
eac338cf | 556 | static const bfd_byte elf_i386_pic_plt0_entry[12] = |
252b5132 RH |
557 | { |
558 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 559 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
560 | }; |
561 | ||
562 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
563 | ||
564 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
565 | { | |
566 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
567 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
568 | 0x68, /* pushl immediate */ | |
569 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
570 | 0xe9, /* jmp relative */ | |
571 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
572 | }; | |
573 | ||
eac338cf PB |
574 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
575 | for the PLTResolve stub and then for each PLT entry. */ | |
576 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
577 | #define PLTRESOLVE_RELOCS 2 | |
578 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
579 | ||
252b5132 | 580 | /* The i386 linker needs to keep track of the number of relocs that it |
ffb2e45b AM |
581 | decides to copy as dynamic relocs in check_relocs for each symbol. |
582 | This is so that it can later discard them if they are found to be | |
583 | unnecessary. We store the information in a field extending the | |
584 | regular ELF linker hash table. */ | |
252b5132 | 585 | |
ffb2e45b | 586 | struct elf_i386_dyn_relocs |
252b5132 | 587 | { |
ffb2e45b | 588 | struct elf_i386_dyn_relocs *next; |
0c715baa AM |
589 | |
590 | /* The input section of the reloc. */ | |
591 | asection *sec; | |
592 | ||
593 | /* Total number of relocs copied for the input section. */ | |
252b5132 | 594 | bfd_size_type count; |
0c715baa AM |
595 | |
596 | /* Number of pc-relative relocs copied for the input section. */ | |
597 | bfd_size_type pc_count; | |
252b5132 RH |
598 | }; |
599 | ||
600 | /* i386 ELF linker hash entry. */ | |
601 | ||
602 | struct elf_i386_link_hash_entry | |
603 | { | |
ebe50bae | 604 | struct elf_link_hash_entry elf; |
252b5132 | 605 | |
0c715baa | 606 | /* Track dynamic relocs copied for this symbol. */ |
ffb2e45b | 607 | struct elf_i386_dyn_relocs *dyn_relocs; |
13ae64f3 | 608 | |
37e55690 JJ |
609 | #define GOT_UNKNOWN 0 |
610 | #define GOT_NORMAL 1 | |
611 | #define GOT_TLS_GD 2 | |
612 | #define GOT_TLS_IE 4 | |
613 | #define GOT_TLS_IE_POS 5 | |
614 | #define GOT_TLS_IE_NEG 6 | |
615 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
616 | #define GOT_TLS_GDESC 8 |
617 | #define GOT_TLS_GD_BOTH_P(type) \ | |
618 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
619 | #define GOT_TLS_GD_P(type) \ | |
620 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
621 | #define GOT_TLS_GDESC_P(type) \ | |
622 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
623 | #define GOT_TLS_GD_ANY_P(type) \ | |
624 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 625 | unsigned char tls_type; |
67a4f2b7 AO |
626 | |
627 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
628 | starting at the end of the jump table. */ | |
629 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
630 | }; |
631 | ||
632 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
633 | ||
634 | struct elf_i386_obj_tdata | |
635 | { | |
636 | struct elf_obj_tdata root; | |
637 | ||
638 | /* tls_type for each local got entry. */ | |
639 | char *local_got_tls_type; | |
67a4f2b7 AO |
640 | |
641 | /* GOTPLT entries for TLS descriptors. */ | |
642 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
643 | }; |
644 | ||
13ae64f3 JJ |
645 | #define elf_i386_tdata(abfd) \ |
646 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
647 | ||
648 | #define elf_i386_local_got_tls_type(abfd) \ | |
649 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
650 | ||
67a4f2b7 AO |
651 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
652 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
653 | ||
0ffa91dd NC |
654 | #define is_i386_elf(bfd) \ |
655 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
656 | && elf_tdata (bfd) != NULL \ | |
657 | && elf_object_id (bfd) == I386_ELF_TDATA) | |
658 | ||
b34976b6 | 659 | static bfd_boolean |
55fd94b0 | 660 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 661 | { |
0ffa91dd NC |
662 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
663 | I386_ELF_TDATA); | |
13ae64f3 | 664 | } |
cedb70c5 | 665 | |
252b5132 RH |
666 | /* i386 ELF linker hash table. */ |
667 | ||
668 | struct elf_i386_link_hash_table | |
669 | { | |
ebe50bae | 670 | struct elf_link_hash_table elf; |
252b5132 | 671 | |
6725bdbf AM |
672 | /* Short-cuts to get to dynamic linker sections. */ |
673 | asection *sgot; | |
674 | asection *sgotplt; | |
675 | asection *srelgot; | |
676 | asection *splt; | |
677 | asection *srelplt; | |
678 | asection *sdynbss; | |
679 | asection *srelbss; | |
cbe950e9 L |
680 | asection *igotplt; |
681 | asection *iplt; | |
682 | asection *irelplt; | |
2a81c24a | 683 | asection *irelifunc; |
9635fe29 | 684 | |
eac338cf PB |
685 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ |
686 | asection *srelplt2; | |
687 | ||
eac338cf PB |
688 | /* True if the target system is VxWorks. */ |
689 | int is_vxworks; | |
ec338859 | 690 | |
eac338cf PB |
691 | /* Value used to fill the last word of the first plt entry. */ |
692 | bfd_byte plt0_pad_byte; | |
9635fe29 | 693 | |
5ae0bfb6 RS |
694 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
695 | bfd_vma next_tls_desc_index; | |
696 | ||
13ae64f3 JJ |
697 | union { |
698 | bfd_signed_vma refcount; | |
699 | bfd_vma offset; | |
700 | } tls_ldm_got; | |
701 | ||
67a4f2b7 AO |
702 | /* The amount of space used by the reserved portion of the sgotplt |
703 | section, plus whatever space is used by the jump slots. */ | |
704 | bfd_vma sgotplt_jump_table_size; | |
705 | ||
ec338859 AM |
706 | /* Small local sym to section mapping cache. */ |
707 | struct sym_sec_cache sym_sec; | |
9f03412a AO |
708 | |
709 | /* _TLS_MODULE_BASE_ symbol. */ | |
710 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
711 | |
712 | /* Used by local STT_GNU_IFUNC symbols. */ | |
713 | htab_t loc_hash_table; | |
714 | void *loc_hash_memory; | |
6725bdbf | 715 | }; |
252b5132 RH |
716 | |
717 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
718 | ||
719 | #define elf_i386_hash_table(p) \ | |
720 | ((struct elf_i386_link_hash_table *) ((p)->hash)) | |
721 | ||
67a4f2b7 | 722 | #define elf_i386_compute_jump_table_size(htab) \ |
5ae0bfb6 | 723 | ((htab)->next_tls_desc_index * 4) |
67a4f2b7 | 724 | |
252b5132 RH |
725 | /* Create an entry in an i386 ELF linker hash table. */ |
726 | ||
727 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
728 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
729 | struct bfd_hash_table *table, | |
730 | const char *string) | |
252b5132 | 731 | { |
252b5132 RH |
732 | /* Allocate the structure if it has not already been allocated by a |
733 | subclass. */ | |
ebe50bae AM |
734 | if (entry == NULL) |
735 | { | |
736 | entry = bfd_hash_allocate (table, | |
737 | sizeof (struct elf_i386_link_hash_entry)); | |
738 | if (entry == NULL) | |
739 | return entry; | |
740 | } | |
252b5132 RH |
741 | |
742 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
743 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
744 | if (entry != NULL) | |
252b5132 | 745 | { |
ebe50bae AM |
746 | struct elf_i386_link_hash_entry *eh; |
747 | ||
748 | eh = (struct elf_i386_link_hash_entry *) entry; | |
749 | eh->dyn_relocs = NULL; | |
13ae64f3 | 750 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 751 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
752 | } |
753 | ||
ebe50bae | 754 | return entry; |
252b5132 RH |
755 | } |
756 | ||
c25bc9fc L |
757 | static hashval_t |
758 | elf_i386_local_hash (int id, int r_sym) | |
759 | { | |
760 | return ((((id & 0xff) << 24) | ((id & 0xff00) << 8)) | |
761 | ^ r_sym ^ (id >> 16)); | |
762 | } | |
763 | ||
764 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry | |
765 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
766 | as global symbol. We reuse indx and dynstr_index for local symbol | |
767 | hash since they aren't used by global symbols in this backend. */ | |
768 | ||
769 | static hashval_t | |
770 | elf_i386_local_htab_hash (const void *ptr) | |
771 | { | |
772 | struct elf_link_hash_entry *h | |
773 | = (struct elf_link_hash_entry *) ptr; | |
774 | return elf_i386_local_hash (h->indx, h->dynstr_index); | |
775 | } | |
776 | ||
777 | /* Compare local hash entries. */ | |
778 | ||
779 | static int | |
780 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
781 | { | |
782 | struct elf_link_hash_entry *h1 | |
783 | = (struct elf_link_hash_entry *) ptr1; | |
784 | struct elf_link_hash_entry *h2 | |
785 | = (struct elf_link_hash_entry *) ptr2; | |
786 | ||
787 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
788 | } | |
789 | ||
790 | /* Find and/or create a hash entry for local symbol. */ | |
791 | ||
792 | static struct elf_link_hash_entry * | |
793 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
794 | bfd *abfd, const Elf_Internal_Rela *rel, | |
795 | bfd_boolean create) | |
796 | { | |
797 | struct elf_i386_link_hash_entry e, *ret; | |
798 | asection *sec = abfd->sections; | |
799 | hashval_t h = elf_i386_local_hash (sec->id, | |
800 | ELF32_R_SYM (rel->r_info)); | |
801 | void **slot; | |
802 | ||
803 | e.elf.indx = sec->id; | |
804 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
805 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
806 | create ? INSERT : NO_INSERT); | |
807 | ||
808 | if (!slot) | |
809 | return NULL; | |
810 | ||
811 | if (*slot) | |
812 | { | |
813 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
814 | return &ret->elf; | |
815 | } | |
816 | ||
817 | ret = (struct elf_i386_link_hash_entry *) | |
818 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
819 | sizeof (struct elf_i386_link_hash_entry)); | |
820 | if (ret) | |
821 | { | |
822 | memset (ret, 0, sizeof (*ret)); | |
823 | ret->elf.indx = sec->id; | |
824 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
825 | ret->elf.dynindx = -1; | |
826 | ret->elf.plt.offset = (bfd_vma) -1; | |
827 | ret->elf.got.offset = (bfd_vma) -1; | |
828 | *slot = ret; | |
829 | } | |
830 | return &ret->elf; | |
831 | } | |
832 | ||
252b5132 RH |
833 | /* Create an i386 ELF linker hash table. */ |
834 | ||
835 | static struct bfd_link_hash_table * | |
55fd94b0 | 836 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
837 | { |
838 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 839 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 840 | |
55fd94b0 | 841 | ret = bfd_malloc (amt); |
ebe50bae | 842 | if (ret == NULL) |
252b5132 RH |
843 | return NULL; |
844 | ||
eb4ff4d6 L |
845 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
846 | elf_i386_link_hash_newfunc, | |
66eb6687 | 847 | sizeof (struct elf_i386_link_hash_entry))) |
252b5132 | 848 | { |
e2d34d7d | 849 | free (ret); |
252b5132 RH |
850 | return NULL; |
851 | } | |
852 | ||
6725bdbf AM |
853 | ret->sgot = NULL; |
854 | ret->sgotplt = NULL; | |
855 | ret->srelgot = NULL; | |
856 | ret->splt = NULL; | |
857 | ret->srelplt = NULL; | |
858 | ret->sdynbss = NULL; | |
859 | ret->srelbss = NULL; | |
cbe950e9 L |
860 | ret->igotplt= NULL; |
861 | ret->iplt = NULL; | |
862 | ret->irelplt= NULL; | |
2a81c24a | 863 | ret->irelifunc = NULL; |
7a624474 | 864 | ret->tls_ldm_got.refcount = 0; |
5ae0bfb6 | 865 | ret->next_tls_desc_index = 0; |
67a4f2b7 | 866 | ret->sgotplt_jump_table_size = 0; |
ec338859 | 867 | ret->sym_sec.abfd = NULL; |
eac338cf PB |
868 | ret->is_vxworks = 0; |
869 | ret->srelplt2 = NULL; | |
eac338cf | 870 | ret->plt0_pad_byte = 0; |
9f03412a | 871 | ret->tls_module_base = NULL; |
6725bdbf | 872 | |
c25bc9fc L |
873 | ret->loc_hash_table = htab_try_create (1024, |
874 | elf_i386_local_htab_hash, | |
875 | elf_i386_local_htab_eq, | |
876 | NULL); | |
877 | ret->loc_hash_memory = objalloc_create (); | |
878 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
879 | { | |
880 | free (ret); | |
881 | return NULL; | |
882 | } | |
883 | ||
ebe50bae | 884 | return &ret->elf.root; |
252b5132 RH |
885 | } |
886 | ||
c25bc9fc L |
887 | /* Destroy an i386 ELF linker hash table. */ |
888 | ||
889 | static void | |
890 | elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash) | |
891 | { | |
892 | struct elf_i386_link_hash_table *htab | |
893 | = (struct elf_i386_link_hash_table *) hash; | |
894 | ||
895 | if (htab->loc_hash_table) | |
896 | htab_delete (htab->loc_hash_table); | |
897 | if (htab->loc_hash_memory) | |
898 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
899 | _bfd_generic_link_hash_table_free (hash); | |
900 | } | |
901 | ||
902 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
903 | shortcuts to them in our hash table. */ | |
904 | ||
6725bdbf AM |
905 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
906 | shortcuts to them in our hash table. */ | |
907 | ||
b34976b6 | 908 | static bfd_boolean |
eb4ff4d6 | 909 | elf_i386_create_got_section (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
910 | { |
911 | struct elf_i386_link_hash_table *htab; | |
912 | ||
913 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 914 | return FALSE; |
6725bdbf AM |
915 | |
916 | htab = elf_i386_hash_table (info); | |
917 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
918 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
919 | if (!htab->sgot || !htab->sgotplt) | |
920 | abort (); | |
921 | ||
3496cb2a L |
922 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got", |
923 | (SEC_ALLOC | SEC_LOAD | |
924 | | SEC_HAS_CONTENTS | |
925 | | SEC_IN_MEMORY | |
926 | | SEC_LINKER_CREATED | |
927 | | SEC_READONLY)); | |
6725bdbf | 928 | if (htab->srelgot == NULL |
6725bdbf | 929 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) |
b34976b6 AM |
930 | return FALSE; |
931 | return TRUE; | |
6725bdbf AM |
932 | } |
933 | ||
934 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and | |
935 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
936 | hash table. */ | |
937 | ||
b34976b6 | 938 | static bfd_boolean |
55fd94b0 | 939 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
940 | { |
941 | struct elf_i386_link_hash_table *htab; | |
942 | ||
943 | htab = elf_i386_hash_table (info); | |
eb4ff4d6 | 944 | if (!htab->sgot && !elf_i386_create_got_section (dynobj, info)) |
b34976b6 | 945 | return FALSE; |
6725bdbf AM |
946 | |
947 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 948 | return FALSE; |
6725bdbf AM |
949 | |
950 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
951 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
952 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
953 | if (!info->shared) | |
954 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
955 | ||
956 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
957 | || (!info->shared && !htab->srelbss)) | |
958 | abort (); | |
959 | ||
711de32c RS |
960 | if (htab->is_vxworks |
961 | && !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2)) | |
962 | return FALSE; | |
eac338cf | 963 | |
b34976b6 | 964 | return TRUE; |
6725bdbf AM |
965 | } |
966 | ||
ebe50bae AM |
967 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
968 | ||
51b64d56 | 969 | static void |
fcfa13d2 | 970 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
971 | struct elf_link_hash_entry *dir, |
972 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
973 | { |
974 | struct elf_i386_link_hash_entry *edir, *eind; | |
975 | ||
976 | edir = (struct elf_i386_link_hash_entry *) dir; | |
977 | eind = (struct elf_i386_link_hash_entry *) ind; | |
978 | ||
bbd7ec4a | 979 | if (eind->dyn_relocs != NULL) |
ebe50bae | 980 | { |
bbd7ec4a AM |
981 | if (edir->dyn_relocs != NULL) |
982 | { | |
983 | struct elf_i386_dyn_relocs **pp; | |
984 | struct elf_i386_dyn_relocs *p; | |
985 | ||
fcfa13d2 | 986 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
987 | list. Merge any entries against the same section. */ |
988 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
989 | { | |
990 | struct elf_i386_dyn_relocs *q; | |
991 | ||
992 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
993 | if (q->sec == p->sec) | |
994 | { | |
995 | q->pc_count += p->pc_count; | |
996 | q->count += p->count; | |
997 | *pp = p->next; | |
998 | break; | |
999 | } | |
1000 | if (q == NULL) | |
1001 | pp = &p->next; | |
1002 | } | |
1003 | *pp = edir->dyn_relocs; | |
1004 | } | |
1005 | ||
ebe50bae AM |
1006 | edir->dyn_relocs = eind->dyn_relocs; |
1007 | eind->dyn_relocs = NULL; | |
1008 | } | |
ebe50bae | 1009 | |
cd67d266 JJ |
1010 | if (ind->root.type == bfd_link_hash_indirect |
1011 | && dir->got.refcount <= 0) | |
1012 | { | |
1013 | edir->tls_type = eind->tls_type; | |
1014 | eind->tls_type = GOT_UNKNOWN; | |
1015 | } | |
81848ca0 AM |
1016 | |
1017 | if (ELIMINATE_COPY_RELOCS | |
1018 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1019 | && dir->dynamic_adjusted) |
1020 | { | |
1021 | /* If called to transfer flags for a weakdef during processing | |
1022 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1023 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1024 | dir->ref_dynamic |= ind->ref_dynamic; | |
1025 | dir->ref_regular |= ind->ref_regular; | |
1026 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1027 | dir->needs_plt |= ind->needs_plt; | |
1028 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1029 | } | |
81848ca0 | 1030 | else |
fcfa13d2 | 1031 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
ebe50bae AM |
1032 | } |
1033 | ||
142411ca L |
1034 | typedef union |
1035 | { | |
1036 | unsigned char c[2]; | |
1037 | uint16_t i; | |
1038 | } | |
1039 | i386_opcode16; | |
1040 | ||
1041 | /* Return TRUE if the TLS access code sequence support transition | |
1042 | from R_TYPE. */ | |
1043 | ||
1044 | static bfd_boolean | |
1045 | elf_i386_check_tls_transition (bfd *abfd, asection *sec, | |
1046 | bfd_byte *contents, | |
1047 | Elf_Internal_Shdr *symtab_hdr, | |
1048 | struct elf_link_hash_entry **sym_hashes, | |
1049 | unsigned int r_type, | |
1050 | const Elf_Internal_Rela *rel, | |
1051 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1052 | { |
142411ca L |
1053 | unsigned int val, type; |
1054 | unsigned long r_symndx; | |
1055 | struct elf_link_hash_entry *h; | |
1056 | bfd_vma offset; | |
1057 | ||
1058 | /* Get the section contents. */ | |
1059 | if (contents == NULL) | |
1060 | { | |
1061 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1062 | contents = elf_section_data (sec)->this_hdr.contents; | |
1063 | else | |
1064 | { | |
1065 | /* FIXME: How to better handle error condition? */ | |
1066 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1067 | return FALSE; | |
13ae64f3 | 1068 | |
142411ca L |
1069 | /* Cache the section contents for elf_link_input_bfd. */ |
1070 | elf_section_data (sec)->this_hdr.contents = contents; | |
1071 | } | |
1072 | } | |
1073 | ||
1074 | offset = rel->r_offset; | |
13ae64f3 | 1075 | switch (r_type) |
142411ca L |
1076 | { |
1077 | case R_386_TLS_GD: | |
1078 | case R_386_TLS_LDM: | |
1079 | if (offset < 2 || (rel + 1) >= relend) | |
1080 | return FALSE; | |
1081 | ||
1082 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1083 | if (r_type == R_386_TLS_GD) | |
1084 | { | |
09e8c3bf | 1085 | /* Check transition from GD access model. Only |
142411ca L |
1086 | leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr |
1087 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop | |
1088 | can transit to different access model. */ | |
1089 | if ((offset + 10) > sec->size || | |
1090 | (type != 0x8d && type != 0x04)) | |
1091 | return FALSE; | |
1092 | ||
1093 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1094 | if (type == 0x04) | |
1095 | { | |
1096 | /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */ | |
1097 | if (offset < 3) | |
1098 | return FALSE; | |
1099 | ||
1100 | if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d) | |
1101 | return FALSE; | |
1102 | ||
1103 | if ((val & 0xc7) != 0x05 || val == (4 << 3)) | |
1104 | return FALSE; | |
1105 | } | |
1106 | else | |
1107 | { | |
1108 | /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */ | |
1109 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1110 | return FALSE; | |
1111 | ||
1112 | if (bfd_get_8 (abfd, contents + offset + 9) != 0x90) | |
1113 | return FALSE; | |
1114 | } | |
1115 | } | |
1116 | else | |
1117 | { | |
1118 | /* Check transition from LD access model. Only | |
1119 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr | |
1120 | can transit to different access model. */ | |
1121 | if (type != 0x8d || (offset + 9) > sec->size) | |
1122 | return FALSE; | |
1123 | ||
1124 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1125 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1126 | return FALSE; | |
1127 | } | |
1128 | ||
1129 | if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8) | |
1130 | return FALSE; | |
1131 | ||
1132 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1133 | if (r_symndx < symtab_hdr->sh_info) | |
1134 | return FALSE; | |
1135 | ||
1136 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
1137 | /* Use strncmp to check ___tls_get_addr since ___tls_get_addr |
1138 | may be versioned. */ | |
142411ca L |
1139 | return (h != NULL |
1140 | && h->root.root.string != NULL | |
1141 | && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1142 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32) | |
c4fb387b L |
1143 | && (strncmp (h->root.root.string, "___tls_get_addr", |
1144 | 15) == 0)); | |
142411ca L |
1145 | |
1146 | case R_386_TLS_IE: | |
1147 | /* Check transition from IE access model: | |
1148 | movl foo@indntpoff(%rip), %eax | |
1149 | movl foo@indntpoff(%rip), %reg | |
1150 | addl foo@indntpoff(%rip), %reg | |
1151 | */ | |
1152 | ||
1153 | if (offset < 1 || (offset + 4) > sec->size) | |
1154 | return FALSE; | |
1155 | ||
1156 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1157 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1158 | if (val == 0xa1) | |
1159 | return TRUE; | |
1160 | ||
1161 | if (offset < 2) | |
1162 | return FALSE; | |
1163 | ||
1164 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1165 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1166 | return ((type == 0x8b || type == 0x03) | |
1167 | && (val & 0xc7) == 0x05); | |
1168 | ||
1169 | case R_386_TLS_GOTIE: | |
1170 | case R_386_TLS_IE_32: | |
1171 | /* Check transition from {IE_32,GOTIE} access model: | |
1172 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1173 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1174 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1175 | */ | |
1176 | ||
1177 | if (offset < 2 || (offset + 4) > sec->size) | |
1178 | return FALSE; | |
1179 | ||
1180 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1181 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1182 | return FALSE; | |
1183 | ||
1184 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1185 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1186 | ||
1187 | case R_386_TLS_GOTDESC: | |
1188 | /* Check transition from GDesc access model: | |
1189 | leal x@tlsdesc(%ebx), %eax | |
1190 | ||
1191 | Make sure it's a leal adding ebx to a 32-bit offset | |
1192 | into any register, although it's probably almost always | |
1193 | going to be eax. */ | |
1194 | ||
1195 | if (offset < 2 || (offset + 4) > sec->size) | |
1196 | return FALSE; | |
1197 | ||
1198 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1199 | return FALSE; | |
1200 | ||
1201 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1202 | return (val & 0xc7) == 0x83; | |
1203 | ||
1204 | case R_386_TLS_DESC_CALL: | |
1205 | /* Check transition from GDesc access model: | |
1206 | call *x@tlsdesc(%rax) | |
1207 | */ | |
1208 | if (offset + 2 <= sec->size) | |
1209 | { | |
1210 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
1211 | static i386_opcode16 call = { { 0xff, 0x10 } }; | |
1212 | return bfd_get_16 (abfd, contents + offset) == call.i; | |
1213 | } | |
1214 | ||
1215 | return FALSE; | |
1216 | ||
1217 | default: | |
1218 | abort (); | |
1219 | } | |
1220 | } | |
1221 | ||
1222 | /* Return TRUE if the TLS access transition is OK or no transition | |
1223 | will be performed. Update R_TYPE if there is a transition. */ | |
1224 | ||
1225 | static bfd_boolean | |
1226 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1227 | asection *sec, bfd_byte *contents, | |
1228 | Elf_Internal_Shdr *symtab_hdr, | |
1229 | struct elf_link_hash_entry **sym_hashes, | |
1230 | unsigned int *r_type, int tls_type, | |
1231 | const Elf_Internal_Rela *rel, | |
1232 | const Elf_Internal_Rela *relend, | |
1233 | struct elf_link_hash_entry *h) | |
1234 | { | |
1235 | unsigned int from_type = *r_type; | |
1236 | unsigned int to_type = from_type; | |
1237 | bfd_boolean check = TRUE; | |
1238 | ||
1239 | switch (from_type) | |
13ae64f3 JJ |
1240 | { |
1241 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1242 | case R_386_TLS_GOTDESC: |
1243 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1244 | case R_386_TLS_IE_32: |
37e55690 JJ |
1245 | case R_386_TLS_IE: |
1246 | case R_386_TLS_GOTIE: | |
142411ca L |
1247 | if (!info->shared) |
1248 | { | |
1249 | if (h == NULL) | |
1250 | to_type = R_386_TLS_LE_32; | |
1251 | else if (from_type != R_386_TLS_IE | |
1252 | && from_type != R_386_TLS_GOTIE) | |
1253 | to_type = R_386_TLS_IE_32; | |
1254 | } | |
1255 | ||
1256 | /* When we are called from elf_i386_relocate_section, CONTENTS | |
1257 | isn't NULL and there may be additional transitions based on | |
1258 | TLS_TYPE. */ | |
1259 | if (contents != NULL) | |
1260 | { | |
1261 | unsigned int new_to_type = to_type; | |
1262 | ||
1263 | if (!info->shared | |
1264 | && h != NULL | |
1265 | && h->dynindx == -1 | |
1266 | && (tls_type & GOT_TLS_IE)) | |
1267 | new_to_type = R_386_TLS_LE_32; | |
1268 | ||
1269 | if (to_type == R_386_TLS_GD | |
1270 | || to_type == R_386_TLS_GOTDESC | |
1271 | || to_type == R_386_TLS_DESC_CALL) | |
1272 | { | |
1273 | if (tls_type == GOT_TLS_IE_POS) | |
1274 | new_to_type = R_386_TLS_GOTIE; | |
1275 | else if (tls_type & GOT_TLS_IE) | |
1276 | new_to_type = R_386_TLS_IE_32; | |
1277 | } | |
1278 | ||
1279 | /* We checked the transition before when we were called from | |
1280 | elf_i386_check_relocs. We only want to check the new | |
1281 | transition which hasn't been checked before. */ | |
1282 | check = new_to_type != to_type && from_type == to_type; | |
1283 | to_type = new_to_type; | |
1284 | } | |
1285 | ||
1286 | break; | |
1287 | ||
13ae64f3 | 1288 | case R_386_TLS_LDM: |
142411ca L |
1289 | if (!info->shared) |
1290 | to_type = R_386_TLS_LE_32; | |
1291 | break; | |
1292 | ||
1293 | default: | |
1294 | return TRUE; | |
1295 | } | |
1296 | ||
1297 | /* Return TRUE if there is no transition. */ | |
1298 | if (from_type == to_type) | |
1299 | return TRUE; | |
1300 | ||
1301 | /* Check if the transition can be performed. */ | |
1302 | if (check | |
1303 | && ! elf_i386_check_tls_transition (abfd, sec, contents, | |
1304 | symtab_hdr, sym_hashes, | |
1305 | from_type, rel, relend)) | |
1306 | { | |
2f629d23 | 1307 | reloc_howto_type *from, *to; |
142411ca L |
1308 | |
1309 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1310 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1311 | ||
1312 | (*_bfd_error_handler) | |
1313 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1314 | "in section `%A' failed"), | |
1315 | abfd, sec, from->name, to->name, | |
1316 | h ? h->root.root.string : "a local symbol", | |
1317 | (unsigned long) rel->r_offset); | |
1318 | bfd_set_error (bfd_error_bad_value); | |
1319 | return FALSE; | |
13ae64f3 JJ |
1320 | } |
1321 | ||
142411ca L |
1322 | *r_type = to_type; |
1323 | return TRUE; | |
13ae64f3 JJ |
1324 | } |
1325 | ||
252b5132 | 1326 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1327 | calculate needed space in the global offset table, procedure linkage |
1328 | table, and dynamic reloc sections. */ | |
252b5132 | 1329 | |
b34976b6 | 1330 | static bfd_boolean |
55fd94b0 AM |
1331 | elf_i386_check_relocs (bfd *abfd, |
1332 | struct bfd_link_info *info, | |
1333 | asection *sec, | |
1334 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1335 | { |
6725bdbf | 1336 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1337 | Elf_Internal_Shdr *symtab_hdr; |
1338 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1339 | const Elf_Internal_Rela *rel; |
1340 | const Elf_Internal_Rela *rel_end; | |
252b5132 | 1341 | asection *sreloc; |
c25bc9fc | 1342 | Elf_Internal_Sym *isymbuf; |
252b5132 | 1343 | |
1049f94e | 1344 | if (info->relocatable) |
b34976b6 | 1345 | return TRUE; |
252b5132 | 1346 | |
0ffa91dd NC |
1347 | BFD_ASSERT (is_i386_elf (abfd)); |
1348 | ||
6725bdbf | 1349 | htab = elf_i386_hash_table (info); |
0ffa91dd | 1350 | symtab_hdr = &elf_symtab_hdr (abfd); |
c25bc9fc | 1351 | isymbuf = (Elf_Internal_Sym *) symtab_hdr->contents; |
252b5132 | 1352 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1353 | |
252b5132 RH |
1354 | sreloc = NULL; |
1355 | ||
1356 | rel_end = relocs + sec->reloc_count; | |
1357 | for (rel = relocs; rel < rel_end; rel++) | |
1358 | { | |
13ae64f3 | 1359 | unsigned int r_type; |
252b5132 RH |
1360 | unsigned long r_symndx; |
1361 | struct elf_link_hash_entry *h; | |
1362 | ||
1363 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1364 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1365 | |
d9bc7a44 | 1366 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1367 | { |
d003868e AM |
1368 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1369 | abfd, | |
8f615d07 | 1370 | r_symndx); |
b34976b6 | 1371 | return FALSE; |
f5f31454 L |
1372 | } |
1373 | ||
252b5132 | 1374 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1375 | { |
1376 | /* A local symbol. */ | |
1377 | Elf_Internal_Sym *isym; | |
1378 | ||
1379 | /* Read this BFD's local symbols. */ | |
1380 | if (isymbuf == NULL) | |
1381 | { | |
1382 | if (isymbuf == NULL) | |
1383 | isymbuf = bfd_elf_get_elf_syms (abfd, symtab_hdr, | |
1384 | symtab_hdr->sh_info, 0, | |
1385 | NULL, NULL, NULL); | |
1386 | if (isymbuf == NULL) | |
1387 | return FALSE; | |
1388 | } | |
1389 | ||
1390 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1391 | isym = isymbuf + r_symndx; | |
1392 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
1393 | { | |
1394 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, | |
1395 | TRUE); | |
1396 | if (h == NULL) | |
1397 | return FALSE; | |
1398 | ||
1399 | /* Fake a STT_GNU_IFUNC symbol. */ | |
1400 | h->type = STT_GNU_IFUNC; | |
1401 | h->def_regular = 1; | |
1402 | h->ref_regular = 1; | |
1403 | h->forced_local = 1; | |
1404 | h->root.type = bfd_link_hash_defined; | |
1405 | } | |
1406 | else | |
1407 | h = NULL; | |
1408 | } | |
252b5132 | 1409 | else |
71cb9464 L |
1410 | { |
1411 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
1412 | while (h->root.type == bfd_link_hash_indirect | |
1413 | || h->root.type == bfd_link_hash_warning) | |
1414 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1415 | } |
cbe950e9 | 1416 | |
c25bc9fc L |
1417 | if (h != NULL) |
1418 | { | |
cbe950e9 L |
1419 | /* Create the ifunc sections for static executables. If we |
1420 | never see an indirect function symbol nor we are building | |
1421 | a static executable, those sections will be empty and | |
1422 | won't appear in output. */ | |
1423 | switch (r_type) | |
1424 | { | |
1425 | default: | |
1426 | break; | |
1427 | ||
1428 | case R_386_32: | |
1429 | case R_386_PC32: | |
1430 | case R_386_PLT32: | |
1431 | case R_386_GOT32: | |
1432 | case R_386_GOTOFF: | |
2a81c24a | 1433 | if (htab->irelifunc == NULL && htab->iplt == NULL) |
cbe950e9 | 1434 | { |
2a81c24a | 1435 | if (!_bfd_elf_create_ifunc_sections (abfd, info)) |
cbe950e9 L |
1436 | return FALSE; |
1437 | ||
2a81c24a L |
1438 | if (info->shared) |
1439 | { | |
1440 | htab->irelifunc = bfd_get_section_by_name (abfd, | |
1441 | ".rel.ifunc"); | |
1442 | if (!htab->irelifunc) | |
1443 | abort (); | |
1444 | } | |
1445 | else | |
1446 | { | |
1447 | htab->iplt = bfd_get_section_by_name (abfd, ".iplt"); | |
1448 | htab->irelplt = bfd_get_section_by_name (abfd, | |
1449 | ".rel.iplt"); | |
1450 | htab->igotplt = bfd_get_section_by_name (abfd, | |
1451 | ".igot.plt"); | |
1452 | if (!htab->iplt | |
1453 | || !htab->irelplt | |
1454 | || !htab->igotplt) | |
1455 | abort (); | |
1456 | } | |
cbe950e9 L |
1457 | } |
1458 | break; | |
1459 | } | |
1460 | ||
1461 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
1462 | it here if it is defined in a non-shared object. */ | |
1463 | if (h->type == STT_GNU_IFUNC | |
1464 | && h->def_regular) | |
1465 | { | |
1466 | /* It is referenced by a non-shared object. */ | |
1467 | h->ref_regular = 1; | |
1468 | ||
1469 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
1470 | h->plt.refcount += 1; | |
1471 | ||
1472 | /* STT_GNU_IFUNC needs dynamic sections. */ | |
1473 | if (htab->elf.dynobj == NULL) | |
1474 | htab->elf.dynobj = abfd; | |
1475 | ||
1476 | switch (r_type) | |
1477 | { | |
1478 | default: | |
1479 | (*_bfd_error_handler) | |
1480 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
1481 | "symbol `%s' isn't handled by %s"), abfd, | |
1482 | elf_howto_table[r_type].name, | |
c25bc9fc L |
1483 | h != NULL ? h->root.root.string : "a local symbol", |
1484 | __FUNCTION__); | |
cbe950e9 L |
1485 | bfd_set_error (bfd_error_bad_value); |
1486 | return FALSE; | |
1487 | ||
1488 | case R_386_32: | |
710ab287 L |
1489 | h->non_got_ref = 1; |
1490 | h->pointer_equality_needed = 1; | |
1491 | if (info->shared) | |
1492 | { | |
1493 | struct elf_i386_dyn_relocs *p; | |
1494 | struct elf_i386_dyn_relocs **head; | |
1495 | ||
1496 | /* We must copy these reloc types into the | |
1497 | output file. Create a reloc section in | |
1498 | dynobj and make room for this reloc. */ | |
1499 | if (sreloc == NULL) | |
1500 | { | |
1501 | if (htab->elf.dynobj == NULL) | |
1502 | htab->elf.dynobj = abfd; | |
1503 | ||
1504 | sreloc = _bfd_elf_make_dynamic_reloc_section | |
1505 | (sec, htab->elf.dynobj, 2, abfd, FALSE); | |
1506 | ||
1507 | if (sreloc == NULL) | |
1508 | return FALSE; | |
1509 | } | |
1510 | ||
1511 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; | |
1512 | p = *head; | |
1513 | if (p == NULL || p->sec != sec) | |
1514 | { | |
1515 | bfd_size_type amt = sizeof *p; | |
1516 | p = bfd_alloc (htab->elf.dynobj, amt); | |
1517 | if (p == NULL) | |
1518 | return FALSE; | |
1519 | p->next = *head; | |
1520 | *head = p; | |
1521 | p->sec = sec; | |
1522 | p->count = 0; | |
1523 | p->pc_count = 0; | |
1524 | } | |
1525 | p->count += 1; | |
1526 | } | |
1527 | break; | |
1528 | ||
cbe950e9 L |
1529 | case R_386_PC32: |
1530 | h->non_got_ref = 1; | |
cbe950e9 L |
1531 | break; |
1532 | ||
1533 | case R_386_PLT32: | |
1534 | break; | |
1535 | ||
1536 | case R_386_GOT32: | |
1537 | case R_386_GOTOFF: | |
7afd84dc | 1538 | h->got.refcount += 1; |
cbe950e9 L |
1539 | if (htab->sgot == NULL |
1540 | && !elf_i386_create_got_section (htab->elf.dynobj, | |
1541 | info)) | |
1542 | return FALSE; | |
1543 | break; | |
1544 | } | |
1545 | ||
1546 | continue; | |
1547 | } | |
71cb9464 | 1548 | } |
252b5132 | 1549 | |
142411ca L |
1550 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1551 | symtab_hdr, sym_hashes, | |
1552 | &r_type, GOT_UNKNOWN, | |
1553 | rel, rel_end, h)) | |
1554 | return FALSE; | |
13ae64f3 JJ |
1555 | |
1556 | switch (r_type) | |
252b5132 | 1557 | { |
37e55690 JJ |
1558 | case R_386_TLS_LDM: |
1559 | htab->tls_ldm_got.refcount += 1; | |
1560 | goto create_got; | |
1561 | ||
1562 | case R_386_PLT32: | |
1563 | /* This symbol requires a procedure linkage table entry. We | |
1564 | actually build the entry in adjust_dynamic_symbol, | |
1565 | because this might be a case of linking PIC code which is | |
1566 | never referenced by a dynamic object, in which case we | |
1567 | don't need to generate a procedure linkage table entry | |
1568 | after all. */ | |
1569 | ||
1570 | /* If this is a local symbol, we resolve it directly without | |
1571 | creating a procedure linkage table entry. */ | |
1572 | if (h == NULL) | |
1573 | continue; | |
1574 | ||
f5385ebf | 1575 | h->needs_plt = 1; |
37e55690 JJ |
1576 | h->plt.refcount += 1; |
1577 | break; | |
1578 | ||
13ae64f3 | 1579 | case R_386_TLS_IE_32: |
37e55690 JJ |
1580 | case R_386_TLS_IE: |
1581 | case R_386_TLS_GOTIE: | |
13ae64f3 JJ |
1582 | if (info->shared) |
1583 | info->flags |= DF_STATIC_TLS; | |
37e55690 JJ |
1584 | /* Fall through */ |
1585 | ||
252b5132 | 1586 | case R_386_GOT32: |
13ae64f3 | 1587 | case R_386_TLS_GD: |
67a4f2b7 AO |
1588 | case R_386_TLS_GOTDESC: |
1589 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1590 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1591 | { |
1592 | int tls_type, old_tls_type; | |
1593 | ||
1594 | switch (r_type) | |
1595 | { | |
1596 | default: | |
1597 | case R_386_GOT32: tls_type = GOT_NORMAL; break; | |
1598 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; | |
67a4f2b7 AO |
1599 | case R_386_TLS_GOTDESC: |
1600 | case R_386_TLS_DESC_CALL: | |
1601 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1602 | case R_386_TLS_IE_32: |
1603 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1604 | tls_type = GOT_TLS_IE_NEG; | |
1605 | else | |
ebcfb3c0 JJ |
1606 | /* If this is a GD->IE transition, we may use either of |
1607 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1608 | tls_type = GOT_TLS_IE; |
1609 | break; | |
1610 | case R_386_TLS_IE: | |
1611 | case R_386_TLS_GOTIE: | |
1612 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1613 | } |
1614 | ||
1615 | if (h != NULL) | |
1616 | { | |
1617 | h->got.refcount += 1; | |
1618 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
1619 | } | |
1620 | else | |
1621 | { | |
1622 | bfd_signed_vma *local_got_refcounts; | |
1623 | ||
1624 | /* This is a global offset table entry for a local symbol. */ | |
1625 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1626 | if (local_got_refcounts == NULL) | |
1627 | { | |
1628 | bfd_size_type size; | |
1629 | ||
1630 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1631 | size *= (sizeof (bfd_signed_vma) |
1632 | + sizeof (bfd_vma) + sizeof(char)); | |
55fd94b0 | 1633 | local_got_refcounts = bfd_zalloc (abfd, size); |
13ae64f3 | 1634 | if (local_got_refcounts == NULL) |
b34976b6 | 1635 | return FALSE; |
13ae64f3 | 1636 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1637 | elf_i386_local_tlsdesc_gotent (abfd) |
1638 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 1639 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 1640 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1641 | } |
1642 | local_got_refcounts[r_symndx] += 1; | |
1643 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
1644 | } | |
1645 | ||
37e55690 JJ |
1646 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1647 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1648 | /* If a TLS symbol is accessed using IE at least once, |
1649 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1650 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1651 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1652 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1653 | { |
67a4f2b7 | 1654 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1655 | tls_type = old_tls_type; |
67a4f2b7 AO |
1656 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1657 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1658 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1659 | else |
1660 | { | |
1661 | (*_bfd_error_handler) | |
d003868e | 1662 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1663 | "thread local symbol"), |
d003868e | 1664 | abfd, |
37e55690 | 1665 | h ? h->root.root.string : "<local>"); |
b34976b6 | 1666 | return FALSE; |
13ae64f3 JJ |
1667 | } |
1668 | } | |
1669 | ||
1670 | if (old_tls_type != tls_type) | |
1671 | { | |
1672 | if (h != NULL) | |
1673 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
1674 | else | |
1675 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1676 | } | |
1677 | } | |
0ac8d2ca AM |
1678 | /* Fall through */ |
1679 | ||
1680 | case R_386_GOTOFF: | |
1681 | case R_386_GOTPC: | |
13ae64f3 | 1682 | create_got: |
0ac8d2ca AM |
1683 | if (htab->sgot == NULL) |
1684 | { | |
1685 | if (htab->elf.dynobj == NULL) | |
1686 | htab->elf.dynobj = abfd; | |
eb4ff4d6 | 1687 | if (!elf_i386_create_got_section (htab->elf.dynobj, info)) |
b34976b6 | 1688 | return FALSE; |
0ac8d2ca | 1689 | } |
37e55690 JJ |
1690 | if (r_type != R_386_TLS_IE) |
1691 | break; | |
1692 | /* Fall through */ | |
252b5132 | 1693 | |
37e55690 JJ |
1694 | case R_386_TLS_LE_32: |
1695 | case R_386_TLS_LE: | |
1696 | if (!info->shared) | |
1697 | break; | |
bffbf940 | 1698 | info->flags |= DF_STATIC_TLS; |
b34976b6 | 1699 | /* Fall through */ |
252b5132 RH |
1700 | |
1701 | case R_386_32: | |
1702 | case R_386_PC32: | |
710ab287 | 1703 | if (h != NULL && info->executable) |
6725bdbf | 1704 | { |
12d0ee4a | 1705 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1706 | need a copy reloc. We can't check reliably at this |
1707 | stage whether the section is read-only, as input | |
1708 | sections have not yet been mapped to output sections. | |
1709 | Tentatively set the flag for now, and correct in | |
1710 | adjust_dynamic_symbol. */ | |
f5385ebf | 1711 | h->non_got_ref = 1; |
12d0ee4a AM |
1712 | |
1713 | /* We may need a .plt entry if the function this reloc | |
1714 | refers to is in a shared lib. */ | |
51b64d56 | 1715 | h->plt.refcount += 1; |
c6585bbb | 1716 | if (r_type != R_386_PC32) |
f5385ebf | 1717 | h->pointer_equality_needed = 1; |
6725bdbf | 1718 | } |
7843f00e | 1719 | |
252b5132 | 1720 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1721 | against a global symbol, or a non PC relative reloc |
1722 | against a local symbol, then we need to copy the reloc | |
1723 | into the shared library. However, if we are linking with | |
1724 | -Bsymbolic, we do not need to copy a reloc against a | |
1725 | global symbol which is defined in an object we are | |
1726 | including in the link (i.e., DEF_REGULAR is set). At | |
1727 | this point we have not seen all the input files, so it is | |
1728 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1729 | later (it is never cleared). In case of a weak definition, |
1730 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1731 | a shared library. We account for that possibility below by |
1f655a09 L |
1732 | storing information in the relocs_copied field of the hash |
1733 | table entry. A similar situation occurs when creating | |
1734 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1735 | symbol local. |
56882138 | 1736 | |
12d0ee4a AM |
1737 | If on the other hand, we are creating an executable, we |
1738 | may need to keep relocations for symbols satisfied by a | |
1739 | dynamic library if we manage to avoid copy relocs for the | |
1740 | symbol. */ | |
1741 | if ((info->shared | |
1742 | && (sec->flags & SEC_ALLOC) != 0 | |
13ae64f3 | 1743 | && (r_type != R_386_PC32 |
12d0ee4a | 1744 | || (h != NULL |
55255dae | 1745 | && (! SYMBOLIC_BIND (info, h) |
12d0ee4a | 1746 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1747 | || !h->def_regular)))) |
a23b6845 AM |
1748 | || (ELIMINATE_COPY_RELOCS |
1749 | && !info->shared | |
12d0ee4a AM |
1750 | && (sec->flags & SEC_ALLOC) != 0 |
1751 | && h != NULL | |
12d0ee4a | 1752 | && (h->root.type == bfd_link_hash_defweak |
0f88be7a | 1753 | || !h->def_regular))) |
252b5132 | 1754 | { |
ec338859 AM |
1755 | struct elf_i386_dyn_relocs *p; |
1756 | struct elf_i386_dyn_relocs **head; | |
1757 | ||
12d0ee4a AM |
1758 | /* We must copy these reloc types into the output file. |
1759 | Create a reloc section in dynobj and make room for | |
1760 | this reloc. */ | |
252b5132 RH |
1761 | if (sreloc == NULL) |
1762 | { | |
0ac8d2ca AM |
1763 | if (htab->elf.dynobj == NULL) |
1764 | htab->elf.dynobj = abfd; | |
1765 | ||
83bac4b0 NC |
1766 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1767 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1768 | ||
252b5132 | 1769 | if (sreloc == NULL) |
83bac4b0 | 1770 | return FALSE; |
252b5132 RH |
1771 | } |
1772 | ||
0c715baa AM |
1773 | /* If this is a global symbol, we count the number of |
1774 | relocations we need for this symbol. */ | |
1775 | if (h != NULL) | |
252b5132 | 1776 | { |
ec338859 | 1777 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; |
0c715baa AM |
1778 | } |
1779 | else | |
1780 | { | |
e81d3500 | 1781 | void **vpp; |
ec338859 AM |
1782 | /* Track dynamic relocs needed for local syms too. |
1783 | We really need local syms available to do this | |
1784 | easily. Oh well. */ | |
1785 | ||
1786 | asection *s; | |
1787 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1788 | sec, r_symndx); | |
1789 | if (s == NULL) | |
b34976b6 | 1790 | return FALSE; |
ec338859 | 1791 | |
e81d3500 DD |
1792 | vpp = &elf_section_data (s)->local_dynrel; |
1793 | head = (struct elf_i386_dyn_relocs **)vpp; | |
ec338859 AM |
1794 | } |
1795 | ||
1796 | p = *head; | |
1797 | if (p == NULL || p->sec != sec) | |
1798 | { | |
1799 | bfd_size_type amt = sizeof *p; | |
55fd94b0 | 1800 | p = bfd_alloc (htab->elf.dynobj, amt); |
ec338859 | 1801 | if (p == NULL) |
b34976b6 | 1802 | return FALSE; |
ec338859 AM |
1803 | p->next = *head; |
1804 | *head = p; | |
1805 | p->sec = sec; | |
1806 | p->count = 0; | |
1807 | p->pc_count = 0; | |
252b5132 | 1808 | } |
ec338859 AM |
1809 | |
1810 | p->count += 1; | |
13ae64f3 | 1811 | if (r_type == R_386_PC32) |
ec338859 | 1812 | p->pc_count += 1; |
252b5132 | 1813 | } |
252b5132 RH |
1814 | break; |
1815 | ||
1816 | /* This relocation describes the C++ object vtable hierarchy. | |
1817 | Reconstruct it for later use during GC. */ | |
1818 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1819 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1820 | return FALSE; |
252b5132 RH |
1821 | break; |
1822 | ||
1823 | /* This relocation describes which C++ vtable entries are actually | |
1824 | used. Record for later use during GC. */ | |
1825 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1826 | BFD_ASSERT (h != NULL); |
1827 | if (h != NULL | |
1828 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
b34976b6 | 1829 | return FALSE; |
252b5132 RH |
1830 | break; |
1831 | ||
1832 | default: | |
1833 | break; | |
1834 | } | |
1835 | } | |
1836 | ||
b34976b6 | 1837 | return TRUE; |
252b5132 RH |
1838 | } |
1839 | ||
1840 | /* Return the section that should be marked against GC for a given | |
1841 | relocation. */ | |
1842 | ||
1843 | static asection * | |
55fd94b0 | 1844 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 1845 | struct bfd_link_info *info, |
55fd94b0 AM |
1846 | Elf_Internal_Rela *rel, |
1847 | struct elf_link_hash_entry *h, | |
1848 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1849 | { |
1850 | if (h != NULL) | |
07adf181 AM |
1851 | switch (ELF32_R_TYPE (rel->r_info)) |
1852 | { | |
1853 | case R_386_GNU_VTINHERIT: | |
1854 | case R_386_GNU_VTENTRY: | |
1855 | return NULL; | |
1856 | } | |
1857 | ||
1858 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1859 | } |
1860 | ||
1861 | /* Update the got entry reference counts for the section being removed. */ | |
1862 | ||
b34976b6 | 1863 | static bfd_boolean |
55fd94b0 AM |
1864 | elf_i386_gc_sweep_hook (bfd *abfd, |
1865 | struct bfd_link_info *info, | |
1866 | asection *sec, | |
1867 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1868 | { |
dd5724d5 AM |
1869 | Elf_Internal_Shdr *symtab_hdr; |
1870 | struct elf_link_hash_entry **sym_hashes; | |
1871 | bfd_signed_vma *local_got_refcounts; | |
1872 | const Elf_Internal_Rela *rel, *relend; | |
dd5724d5 | 1873 | |
7dda2462 TG |
1874 | if (info->relocatable) |
1875 | return TRUE; | |
1876 | ||
ec338859 | 1877 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1878 | |
0ffa91dd | 1879 | symtab_hdr = &elf_symtab_hdr (abfd); |
6725bdbf AM |
1880 | sym_hashes = elf_sym_hashes (abfd); |
1881 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1882 | |
1883 | relend = relocs + sec->reloc_count; | |
1884 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1885 | { |
1886 | unsigned long r_symndx; | |
1887 | unsigned int r_type; | |
1888 | struct elf_link_hash_entry *h = NULL; | |
37e55690 | 1889 | |
26e41594 AM |
1890 | r_symndx = ELF32_R_SYM (rel->r_info); |
1891 | if (r_symndx >= symtab_hdr->sh_info) | |
1892 | { | |
1893 | struct elf_i386_link_hash_entry *eh; | |
1894 | struct elf_i386_dyn_relocs **pp; | |
1895 | struct elf_i386_dyn_relocs *p; | |
dd5724d5 | 1896 | |
26e41594 | 1897 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1898 | while (h->root.type == bfd_link_hash_indirect |
1899 | || h->root.type == bfd_link_hash_warning) | |
1900 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1901 | eh = (struct elf_i386_link_hash_entry *) h; |
0c715baa | 1902 | |
26e41594 AM |
1903 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1904 | if (p->sec == sec) | |
1905 | { | |
1906 | /* Everything must go for SEC. */ | |
1907 | *pp = p->next; | |
1908 | break; | |
1909 | } | |
1910 | } | |
0c715baa | 1911 | |
26e41594 | 1912 | r_type = ELF32_R_TYPE (rel->r_info); |
142411ca L |
1913 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1914 | symtab_hdr, sym_hashes, | |
1915 | &r_type, GOT_UNKNOWN, | |
1916 | rel, relend, h)) | |
1917 | return FALSE; | |
1918 | ||
26e41594 AM |
1919 | switch (r_type) |
1920 | { | |
1921 | case R_386_TLS_LDM: | |
1922 | if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0) | |
1923 | elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1924 | break; | |
0c715baa | 1925 | |
26e41594 | 1926 | case R_386_TLS_GD: |
67a4f2b7 AO |
1927 | case R_386_TLS_GOTDESC: |
1928 | case R_386_TLS_DESC_CALL: | |
26e41594 AM |
1929 | case R_386_TLS_IE_32: |
1930 | case R_386_TLS_IE: | |
1931 | case R_386_TLS_GOTIE: | |
1932 | case R_386_GOT32: | |
1933 | if (h != NULL) | |
1934 | { | |
1935 | if (h->got.refcount > 0) | |
1936 | h->got.refcount -= 1; | |
1937 | } | |
1938 | else if (local_got_refcounts != NULL) | |
1939 | { | |
1940 | if (local_got_refcounts[r_symndx] > 0) | |
1941 | local_got_refcounts[r_symndx] -= 1; | |
1942 | } | |
1943 | break; | |
0c715baa | 1944 | |
26e41594 AM |
1945 | case R_386_32: |
1946 | case R_386_PC32: | |
1947 | if (info->shared) | |
1948 | break; | |
1949 | /* Fall through */ | |
6725bdbf | 1950 | |
26e41594 AM |
1951 | case R_386_PLT32: |
1952 | if (h != NULL) | |
1953 | { | |
1954 | if (h->plt.refcount > 0) | |
1955 | h->plt.refcount -= 1; | |
1956 | } | |
1957 | break; | |
dd5724d5 | 1958 | |
26e41594 AM |
1959 | default: |
1960 | break; | |
1961 | } | |
1962 | } | |
252b5132 | 1963 | |
b34976b6 | 1964 | return TRUE; |
252b5132 RH |
1965 | } |
1966 | ||
1967 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1968 | regular object. The current definition is in some section of the | |
1969 | dynamic object, but we're not including those sections. We have to | |
1970 | change the definition to something the rest of the link can | |
1971 | understand. */ | |
1972 | ||
b34976b6 | 1973 | static bfd_boolean |
55fd94b0 AM |
1974 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
1975 | struct elf_link_hash_entry *h) | |
252b5132 | 1976 | { |
6725bdbf | 1977 | struct elf_i386_link_hash_table *htab; |
252b5132 | 1978 | asection *s; |
252b5132 | 1979 | |
cbe950e9 L |
1980 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1981 | if (h->type == STT_GNU_IFUNC) | |
1982 | { | |
1983 | if (h->plt.refcount <= 0) | |
1984 | { | |
1985 | h->plt.offset = (bfd_vma) -1; | |
1986 | h->needs_plt = 0; | |
1987 | } | |
1988 | return TRUE; | |
1989 | } | |
1990 | ||
252b5132 RH |
1991 | /* If this is a function, put it in the procedure linkage table. We |
1992 | will fill in the contents of the procedure linkage table later, | |
1993 | when we know the address of the .got section. */ | |
1994 | if (h->type == STT_FUNC | |
f5385ebf | 1995 | || h->needs_plt) |
252b5132 | 1996 | { |
6725bdbf | 1997 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
1998 | || SYMBOL_CALLS_LOCAL (info, h) |
1999 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2000 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2001 | { |
2002 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2003 | file, but the symbol was never referred to by a dynamic |
2004 | object, or if all references were garbage collected. In | |
2005 | such a case, we don't actually need to build a procedure | |
2006 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2007 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2008 | h->needs_plt = 0; |
252b5132 RH |
2009 | } |
2010 | ||
b34976b6 | 2011 | return TRUE; |
252b5132 | 2012 | } |
6725bdbf AM |
2013 | else |
2014 | /* It's possible that we incorrectly decided a .plt reloc was | |
2015 | needed for an R_386_PC32 reloc to a non-function sym in | |
2016 | check_relocs. We can't decide accurately between function and | |
2017 | non-function syms in check-relocs; Objects loaded later in | |
2018 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2019 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2020 | |
2021 | /* If this is a weak symbol, and there is a real definition, the | |
2022 | processor independent code will have arranged for us to see the | |
2023 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2024 | if (h->u.weakdef != NULL) |
252b5132 | 2025 | { |
f6e332e6 AM |
2026 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2027 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2028 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2029 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2030 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2031 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2032 | return TRUE; |
252b5132 RH |
2033 | } |
2034 | ||
2035 | /* This is a reference to a symbol defined by a dynamic object which | |
2036 | is not a function. */ | |
2037 | ||
2038 | /* If we are creating a shared library, we must presume that the | |
2039 | only references to the symbol are via the global offset table. | |
2040 | For such cases we need not do anything here; the relocations will | |
2041 | be handled correctly by relocate_section. */ | |
2042 | if (info->shared) | |
b34976b6 | 2043 | return TRUE; |
252b5132 | 2044 | |
7843f00e ILT |
2045 | /* If there are no references to this symbol that do not use the |
2046 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2047 | if (!h->non_got_ref) |
b34976b6 | 2048 | return TRUE; |
7843f00e | 2049 | |
8bd621d8 AM |
2050 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2051 | if (info->nocopyreloc) | |
2052 | { | |
f5385ebf | 2053 | h->non_got_ref = 0; |
b34976b6 | 2054 | return TRUE; |
8bd621d8 AM |
2055 | } |
2056 | ||
643796e3 DJ |
2057 | htab = elf_i386_hash_table (info); |
2058 | ||
2059 | /* If there aren't any dynamic relocs in read-only sections, then | |
2060 | we can keep the dynamic relocs and avoid the copy reloc. This | |
2061 | doesn't work on VxWorks, where we can not have dynamic relocations | |
2062 | (other than copy and jump slot relocations) in an executable. */ | |
2063 | if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks) | |
ebe50bae | 2064 | { |
a23b6845 AM |
2065 | struct elf_i386_link_hash_entry * eh; |
2066 | struct elf_i386_dyn_relocs *p; | |
ebe50bae | 2067 | |
a23b6845 AM |
2068 | eh = (struct elf_i386_link_hash_entry *) h; |
2069 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2070 | { | |
2071 | s = p->sec->output_section; | |
2072 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2073 | break; | |
2074 | } | |
2075 | ||
a23b6845 AM |
2076 | if (p == NULL) |
2077 | { | |
f5385ebf | 2078 | h->non_got_ref = 0; |
a23b6845 AM |
2079 | return TRUE; |
2080 | } | |
ebe50bae AM |
2081 | } |
2082 | ||
909272ee AM |
2083 | if (h->size == 0) |
2084 | { | |
2085 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
2086 | h->root.root.string); | |
2087 | return TRUE; | |
2088 | } | |
2089 | ||
252b5132 RH |
2090 | /* We must allocate the symbol in our .dynbss section, which will |
2091 | become part of the .bss section of the executable. There will be | |
2092 | an entry for this symbol in the .dynsym section. The dynamic | |
2093 | object will contain position independent code, so all references | |
2094 | from the dynamic object to this symbol will go through the global | |
2095 | offset table. The dynamic linker will use the .dynsym entry to | |
2096 | determine the address it must put in the global offset table, so | |
2097 | both the dynamic object and the regular object will refer to the | |
2098 | same memory location for the variable. */ | |
2099 | ||
252b5132 RH |
2100 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2101 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2102 | runtime process image. */ |
252b5132 RH |
2103 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
2104 | { | |
eea6121a | 2105 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2106 | h->needs_copy = 1; |
252b5132 RH |
2107 | } |
2108 | ||
0ac8d2ca | 2109 | s = htab->sdynbss; |
252b5132 | 2110 | |
027297b7 | 2111 | return _bfd_elf_adjust_dynamic_copy (h, s); |
252b5132 RH |
2112 | } |
2113 | ||
6725bdbf | 2114 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2115 | dynamic relocs. */ |
6725bdbf | 2116 | |
b34976b6 | 2117 | static bfd_boolean |
eb4ff4d6 | 2118 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2119 | { |
2120 | struct bfd_link_info *info; | |
2121 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2122 | struct elf_i386_link_hash_entry *eh; |
0c715baa | 2123 | struct elf_i386_dyn_relocs *p; |
6725bdbf | 2124 | |
e92d460e | 2125 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2126 | return TRUE; |
6725bdbf | 2127 | |
e92d460e AM |
2128 | if (h->root.type == bfd_link_hash_warning) |
2129 | /* When warning symbols are created, they **replace** the "real" | |
2130 | entry in the hash table, thus we never get to see the real | |
2131 | symbol in a hash traversal. So look at it now. */ | |
2132 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
cbe950e9 | 2133 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2134 | |
6725bdbf AM |
2135 | info = (struct bfd_link_info *) inf; |
2136 | htab = elf_i386_hash_table (info); | |
2137 | ||
cbe950e9 L |
2138 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2139 | here if it is defined and referenced in a non-shared object. */ | |
2140 | if (h->type == STT_GNU_IFUNC | |
2141 | && h->def_regular) | |
2142 | { | |
2143 | asection *plt, *gotplt, *relplt; | |
2144 | ||
2145 | /* Return and discard space for dynamic relocations against it if | |
2146 | it is never referenced in a non-shared object. */ | |
2147 | if (!h->ref_regular) | |
2148 | { | |
2149 | if (h->plt.refcount > 0 | |
2150 | || h->got.refcount > 0) | |
2151 | abort (); | |
2152 | h->got.offset = (bfd_vma) -1; | |
2153 | eh->dyn_relocs = NULL; | |
2154 | return TRUE; | |
2155 | } | |
2156 | ||
cbe950e9 L |
2157 | /* When building a static executable, use .iplt, .igot.plt and |
2158 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
710ab287 | 2159 | if (htab->splt != NULL) |
cbe950e9 L |
2160 | { |
2161 | plt = htab->splt; | |
2162 | gotplt = htab->sgotplt; | |
2163 | relplt = htab->srelplt; | |
2164 | ||
2165 | /* If this is the first .plt entry, make room for the special | |
2166 | first entry. */ | |
2167 | if (plt->size == 0) | |
2168 | plt->size += PLT_ENTRY_SIZE; | |
2169 | } | |
2170 | else | |
2171 | { | |
2172 | plt = htab->iplt; | |
2173 | gotplt = htab->igotplt; | |
2174 | relplt = htab->irelplt; | |
2175 | } | |
2176 | ||
2177 | /* Don't update value of STT_GNU_IFUNC symbol to PLT. We need | |
2178 | the original value for R_386_IRELATIVE. */ | |
2179 | h->plt.offset = plt->size; | |
2180 | ||
2181 | /* Make room for this entry in the .plt/.iplt section. */ | |
2182 | plt->size += PLT_ENTRY_SIZE; | |
2183 | ||
2184 | /* We also need to make an entry in the .got.plt/.got.iplt | |
2185 | section, which will be placed in the .got section by the | |
2186 | linker script. */ | |
2187 | gotplt->size += 4; | |
2188 | ||
2189 | /* We also need to make an entry in the .rela.plt/.rela.iplt | |
2190 | section. */ | |
2191 | relplt->size += sizeof (Elf32_External_Rel); | |
2192 | relplt->reloc_count++; | |
2193 | ||
710ab287 L |
2194 | /* We need dynamic relocation for STT_GNU_IFUNC symbol only |
2195 | when there is a non-GOT reference in a shared object. */ | |
2196 | if (!info->shared | |
2197 | || !h->non_got_ref) | |
cbe950e9 L |
2198 | eh->dyn_relocs = NULL; |
2199 | ||
710ab287 L |
2200 | /* Finally, allocate space. */ |
2201 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2a81c24a | 2202 | htab->irelifunc->size += p->count * sizeof (Elf32_External_Rel); |
710ab287 L |
2203 | |
2204 | /* For STT_GNU_IFUNC symbol, .got.plt has the real function | |
2205 | addres and .got has the PLT entry adddress. We will load | |
2206 | the GOT entry with the PLT entry in finish_dynamic_symbol if | |
2207 | it is used. For branch, it uses .got.plt. For symbol value, | |
2208 | 1. Use .got.plt in a shared object if it is forced local or | |
2209 | not dynamic. | |
2210 | 2. Use .got.plt in a non-shared object if pointer equality | |
2211 | isn't needed. | |
2212 | 3. Use .got.plt if .got isn't used. | |
2213 | 4. Otherwise use .got so that it can be shared among different | |
2214 | objects at run-time. | |
2215 | We only need to relocate .got entry in shared object. */ | |
2216 | if ((info->shared | |
2217 | && (h->dynindx == -1 | |
2218 | || h->forced_local)) | |
2219 | || (!info->shared | |
2220 | && !h->pointer_equality_needed) | |
2221 | || htab->sgot == NULL) | |
2222 | { | |
2223 | /* Use .got.plt. */ | |
2224 | h->got.offset = (bfd_vma) -1; | |
0018b0a3 | 2225 | } |
710ab287 L |
2226 | else |
2227 | { | |
2228 | h->got.offset = htab->sgot->size; | |
2229 | htab->sgot->size += 4; | |
2230 | if (info->shared) | |
2231 | htab->srelgot->size += sizeof (Elf32_External_Rel); | |
2232 | } | |
2233 | ||
2234 | return TRUE; | |
cbe950e9 L |
2235 | } |
2236 | else if (htab->elf.dynamic_sections_created | |
2237 | && h->plt.refcount > 0) | |
6725bdbf | 2238 | { |
5a15f56f AM |
2239 | /* Make sure this symbol is output as a dynamic symbol. |
2240 | Undefined weak syms won't yet be marked as dynamic. */ | |
2241 | if (h->dynindx == -1 | |
f5385ebf | 2242 | && !h->forced_local) |
5a15f56f | 2243 | { |
c152c796 | 2244 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2245 | return FALSE; |
5a15f56f AM |
2246 | } |
2247 | ||
4e795f50 AM |
2248 | if (info->shared |
2249 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
ced53ee5 | 2250 | { |
0ac8d2ca | 2251 | asection *s = htab->splt; |
6725bdbf | 2252 | |
ced53ee5 AM |
2253 | /* If this is the first .plt entry, make room for the special |
2254 | first entry. */ | |
eea6121a AM |
2255 | if (s->size == 0) |
2256 | s->size += PLT_ENTRY_SIZE; | |
6725bdbf | 2257 | |
eea6121a | 2258 | h->plt.offset = s->size; |
6725bdbf | 2259 | |
ced53ee5 AM |
2260 | /* If this symbol is not defined in a regular file, and we are |
2261 | not generating a shared library, then set the symbol to this | |
2262 | location in the .plt. This is required to make function | |
2263 | pointers compare as equal between the normal executable and | |
2264 | the shared library. */ | |
2265 | if (! info->shared | |
f5385ebf | 2266 | && !h->def_regular) |
ced53ee5 AM |
2267 | { |
2268 | h->root.u.def.section = s; | |
2269 | h->root.u.def.value = h->plt.offset; | |
2270 | } | |
6725bdbf | 2271 | |
ced53ee5 | 2272 | /* Make room for this entry. */ |
eea6121a | 2273 | s->size += PLT_ENTRY_SIZE; |
6725bdbf | 2274 | |
ced53ee5 AM |
2275 | /* We also need to make an entry in the .got.plt section, which |
2276 | will be placed in the .got section by the linker script. */ | |
eea6121a | 2277 | htab->sgotplt->size += 4; |
6725bdbf | 2278 | |
6725bdbf | 2279 | /* We also need to make an entry in the .rel.plt section. */ |
eea6121a | 2280 | htab->srelplt->size += sizeof (Elf32_External_Rel); |
5ae0bfb6 | 2281 | htab->next_tls_desc_index++; |
eac338cf PB |
2282 | |
2283 | if (htab->is_vxworks && !info->shared) | |
2284 | { | |
2285 | /* VxWorks has a second set of relocations for each PLT entry | |
2286 | in executables. They go in a separate relocation section, | |
2287 | which is processed by the kernel loader. */ | |
2288 | ||
2289 | /* There are two relocations for the initial PLT entry: an | |
2290 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2291 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2292 | ||
2293 | if (h->plt.offset == PLT_ENTRY_SIZE) | |
2294 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2295 | ||
2296 | /* There are two extra relocations for each subsequent PLT entry: | |
2297 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2298 | relocation for the PLT entry. */ | |
2299 | ||
2300 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2301 | } | |
6725bdbf | 2302 | } |
ced53ee5 AM |
2303 | else |
2304 | { | |
51b64d56 | 2305 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2306 | h->needs_plt = 0; |
ced53ee5 | 2307 | } |
6725bdbf AM |
2308 | } |
2309 | else | |
2310 | { | |
51b64d56 | 2311 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2312 | h->needs_plt = 0; |
6725bdbf AM |
2313 | } |
2314 | ||
67a4f2b7 AO |
2315 | eh->tlsdesc_got = (bfd_vma) -1; |
2316 | ||
37e55690 | 2317 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2318 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2319 | if (h->got.refcount > 0 | |
2320 | && !info->shared | |
2321 | && h->dynindx == -1 | |
37e55690 | 2322 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2323 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2324 | else if (h->got.refcount > 0) |
6725bdbf | 2325 | { |
0ac8d2ca | 2326 | asection *s; |
b34976b6 | 2327 | bfd_boolean dyn; |
13ae64f3 | 2328 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2329 | |
5a15f56f AM |
2330 | /* Make sure this symbol is output as a dynamic symbol. |
2331 | Undefined weak syms won't yet be marked as dynamic. */ | |
2332 | if (h->dynindx == -1 | |
f5385ebf | 2333 | && !h->forced_local) |
5a15f56f | 2334 | { |
c152c796 | 2335 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2336 | return FALSE; |
5a15f56f AM |
2337 | } |
2338 | ||
6725bdbf | 2339 | s = htab->sgot; |
67a4f2b7 AO |
2340 | if (GOT_TLS_GDESC_P (tls_type)) |
2341 | { | |
2342 | eh->tlsdesc_got = htab->sgotplt->size | |
2343 | - elf_i386_compute_jump_table_size (htab); | |
2344 | htab->sgotplt->size += 8; | |
2345 | h->got.offset = (bfd_vma) -2; | |
2346 | } | |
2347 | if (! GOT_TLS_GDESC_P (tls_type) | |
2348 | || GOT_TLS_GD_P (tls_type)) | |
2349 | { | |
2350 | h->got.offset = s->size; | |
2351 | s->size += 4; | |
2352 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2353 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2354 | s->size += 4; | |
2355 | } | |
ebe50bae | 2356 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2357 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2358 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2359 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2360 | need two), R_386_TLS_GD needs one if local symbol and two if | |
2361 | global. */ | |
2362 | if (tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 2363 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2364 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2365 | || (tls_type & GOT_TLS_IE)) |
eea6121a | 2366 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2367 | else if (GOT_TLS_GD_P (tls_type)) |
eea6121a | 2368 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2369 | else if (! GOT_TLS_GDESC_P (tls_type) |
2370 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2371 | || h->root.type != bfd_link_hash_undefweak) | |
ef5aade5 L |
2372 | && (info->shared |
2373 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 2374 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2375 | if (GOT_TLS_GDESC_P (tls_type)) |
2376 | htab->srelplt->size += sizeof (Elf32_External_Rel); | |
6725bdbf AM |
2377 | } |
2378 | else | |
51b64d56 | 2379 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2380 | |
5a15f56f | 2381 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2382 | return TRUE; |
5a15f56f | 2383 | |
0c715baa AM |
2384 | /* In the shared -Bsymbolic case, discard space allocated for |
2385 | dynamic pc-relative relocs against symbols which turn out to be | |
2386 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2387 | space for pc-relative relocs that have become local due to symbol |
2388 | visibility changes. */ | |
0c715baa AM |
2389 | |
2390 | if (info->shared) | |
5a15f56f | 2391 | { |
09695f56 AM |
2392 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2393 | appear on a call or on something like ".long foo - .". We | |
2394 | want calls to protected symbols to resolve directly to the | |
2395 | function rather than going via the plt. If people want | |
2396 | function pointer comparisons to work as expected then they | |
2397 | should avoid writing assembly like ".long foo - .". */ | |
2398 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2399 | { |
0c715baa AM |
2400 | struct elf_i386_dyn_relocs **pp; |
2401 | ||
2402 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2403 | { | |
2404 | p->count -= p->pc_count; | |
2405 | p->pc_count = 0; | |
2406 | if (p->count == 0) | |
2407 | *pp = p->next; | |
2408 | else | |
2409 | pp = &p->next; | |
2410 | } | |
5a15f56f | 2411 | } |
4e795f50 | 2412 | |
3348747a NS |
2413 | if (htab->is_vxworks) |
2414 | { | |
2415 | struct elf_i386_dyn_relocs **pp; | |
2416 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2417 | { | |
2418 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2419 | *pp = p->next; | |
2420 | else | |
2421 | pp = &p->next; | |
2422 | } | |
2423 | } | |
2424 | ||
4e795f50 | 2425 | /* Also discard relocs on undefined weak syms with non-default |
3348747a | 2426 | visibility. */ |
22d606e9 | 2427 | if (eh->dyn_relocs != NULL |
4e795f50 | 2428 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2429 | { |
2430 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2431 | eh->dyn_relocs = NULL; | |
2432 | ||
2433 | /* Make sure undefined weak symbols are output as a dynamic | |
2434 | symbol in PIEs. */ | |
2435 | else if (h->dynindx == -1 | |
2436 | && !h->forced_local) | |
2437 | { | |
2438 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2439 | return FALSE; | |
2440 | } | |
2441 | } | |
0c715baa | 2442 | } |
a23b6845 | 2443 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2444 | { |
2445 | /* For the non-shared case, discard space for relocs against | |
2446 | symbols which turn out to need copy relocs or are not | |
2447 | dynamic. */ | |
2448 | ||
f5385ebf AM |
2449 | if (!h->non_got_ref |
2450 | && ((h->def_dynamic | |
2451 | && !h->def_regular) | |
ebe50bae | 2452 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2453 | && (h->root.type == bfd_link_hash_undefweak |
2454 | || h->root.type == bfd_link_hash_undefined)))) | |
2455 | { | |
2456 | /* Make sure this symbol is output as a dynamic symbol. | |
2457 | Undefined weak syms won't yet be marked as dynamic. */ | |
2458 | if (h->dynindx == -1 | |
f5385ebf | 2459 | && !h->forced_local) |
0c715baa | 2460 | { |
c152c796 | 2461 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2462 | return FALSE; |
0c715baa | 2463 | } |
5a15f56f | 2464 | |
0c715baa AM |
2465 | /* If that succeeded, we know we'll be keeping all the |
2466 | relocs. */ | |
2467 | if (h->dynindx != -1) | |
2468 | goto keep; | |
2469 | } | |
2470 | ||
2471 | eh->dyn_relocs = NULL; | |
2472 | ||
ec338859 | 2473 | keep: ; |
5a15f56f AM |
2474 | } |
2475 | ||
0c715baa AM |
2476 | /* Finally, allocate space. */ |
2477 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2478 | { |
e7c33416 NC |
2479 | asection *sreloc; |
2480 | ||
cbe950e9 | 2481 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2482 | |
2483 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2484 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2485 | } |
2486 | ||
b34976b6 | 2487 | return TRUE; |
6725bdbf AM |
2488 | } |
2489 | ||
c25bc9fc L |
2490 | /* Allocate space in .plt, .got and associated reloc sections for |
2491 | local dynamic relocs. */ | |
2492 | ||
2493 | static bfd_boolean | |
2494 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2495 | { | |
2496 | struct elf_link_hash_entry *h | |
2497 | = (struct elf_link_hash_entry *) *slot; | |
2498 | ||
2499 | if (h->type != STT_GNU_IFUNC | |
2500 | || !h->def_regular | |
2501 | || !h->ref_regular | |
2502 | || !h->forced_local | |
2503 | || h->root.type != bfd_link_hash_defined) | |
2504 | abort (); | |
2505 | ||
2506 | return elf_i386_allocate_dynrelocs (h, inf); | |
2507 | } | |
2508 | ||
0c715baa AM |
2509 | /* Find any dynamic relocs that apply to read-only sections. */ |
2510 | ||
b34976b6 | 2511 | static bfd_boolean |
eb4ff4d6 | 2512 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
2513 | { |
2514 | struct elf_i386_link_hash_entry *eh; | |
2515 | struct elf_i386_dyn_relocs *p; | |
2516 | ||
e92d460e AM |
2517 | if (h->root.type == bfd_link_hash_warning) |
2518 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2519 | ||
0c715baa AM |
2520 | eh = (struct elf_i386_link_hash_entry *) h; |
2521 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2522 | { | |
2523 | asection *s = p->sec->output_section; | |
2524 | ||
2525 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2526 | { | |
2527 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2528 | ||
2529 | info->flags |= DF_TEXTREL; | |
2530 | ||
2531 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 2532 | return FALSE; |
0c715baa AM |
2533 | } |
2534 | } | |
b34976b6 | 2535 | return TRUE; |
0c715baa AM |
2536 | } |
2537 | ||
252b5132 RH |
2538 | /* Set the sizes of the dynamic sections. */ |
2539 | ||
b34976b6 | 2540 | static bfd_boolean |
55fd94b0 AM |
2541 | elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
2542 | struct bfd_link_info *info) | |
252b5132 | 2543 | { |
6725bdbf | 2544 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
2545 | bfd *dynobj; |
2546 | asection *s; | |
b34976b6 | 2547 | bfd_boolean relocs; |
0c715baa | 2548 | bfd *ibfd; |
252b5132 | 2549 | |
6725bdbf | 2550 | htab = elf_i386_hash_table (info); |
ebe50bae | 2551 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
2552 | if (dynobj == NULL) |
2553 | abort (); | |
252b5132 | 2554 | |
ebe50bae | 2555 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2556 | { |
2557 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2558 | if (info->executable) |
252b5132 RH |
2559 | { |
2560 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
ffb2e45b AM |
2561 | if (s == NULL) |
2562 | abort (); | |
eea6121a | 2563 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
2564 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2565 | } | |
161d71a6 | 2566 | } |
6725bdbf | 2567 | |
0c715baa AM |
2568 | /* Set up .got offsets for local syms, and space for local dynamic |
2569 | relocs. */ | |
2570 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
161d71a6 L |
2571 | { |
2572 | bfd_signed_vma *local_got; | |
2573 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 2574 | char *local_tls_type; |
67a4f2b7 | 2575 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
2576 | bfd_size_type locsymcount; |
2577 | Elf_Internal_Shdr *symtab_hdr; | |
2578 | asection *srel; | |
6725bdbf | 2579 | |
0ffa91dd | 2580 | if (! is_i386_elf (ibfd)) |
161d71a6 | 2581 | continue; |
6725bdbf | 2582 | |
0c715baa AM |
2583 | for (s = ibfd->sections; s != NULL; s = s->next) |
2584 | { | |
ec338859 | 2585 | struct elf_i386_dyn_relocs *p; |
0c715baa | 2586 | |
e81d3500 DD |
2587 | for (p = ((struct elf_i386_dyn_relocs *) |
2588 | elf_section_data (s)->local_dynrel); | |
ec338859 AM |
2589 | p != NULL; |
2590 | p = p->next) | |
0c715baa | 2591 | { |
ec338859 AM |
2592 | if (!bfd_is_abs_section (p->sec) |
2593 | && bfd_is_abs_section (p->sec->output_section)) | |
2594 | { | |
2595 | /* Input section has been discarded, either because | |
2596 | it is a copy of a linkonce section or due to | |
2597 | linker script /DISCARD/, so we'll be discarding | |
2598 | the relocs too. */ | |
2599 | } | |
3348747a NS |
2600 | else if (htab->is_vxworks |
2601 | && strcmp (p->sec->output_section->name, | |
2602 | ".tls_vars") == 0) | |
2603 | { | |
2604 | /* Relocations in vxworks .tls_vars sections are | |
2605 | handled specially by the loader. */ | |
2606 | } | |
248866a8 | 2607 | else if (p->count != 0) |
ec338859 AM |
2608 | { |
2609 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2610 | srel->size += p->count * sizeof (Elf32_External_Rel); |
248866a8 AM |
2611 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
2612 | info->flags |= DF_TEXTREL; | |
ec338859 | 2613 | } |
0c715baa AM |
2614 | } |
2615 | } | |
2616 | ||
2617 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
2618 | if (!local_got) |
2619 | continue; | |
6725bdbf | 2620 | |
0ffa91dd | 2621 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
2622 | locsymcount = symtab_hdr->sh_info; |
2623 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 2624 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 2625 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
161d71a6 L |
2626 | s = htab->sgot; |
2627 | srel = htab->srelgot; | |
67a4f2b7 AO |
2628 | for (; local_got < end_local_got; |
2629 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 2630 | { |
67a4f2b7 | 2631 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 2632 | if (*local_got > 0) |
6725bdbf | 2633 | { |
67a4f2b7 AO |
2634 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2635 | { | |
2636 | *local_tlsdesc_gotent = htab->sgotplt->size | |
2637 | - elf_i386_compute_jump_table_size (htab); | |
2638 | htab->sgotplt->size += 8; | |
2639 | *local_got = (bfd_vma) -2; | |
2640 | } | |
2641 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2642 | || GOT_TLS_GD_P (*local_tls_type)) | |
2643 | { | |
2644 | *local_got = s->size; | |
2645 | s->size += 4; | |
2646 | if (GOT_TLS_GD_P (*local_tls_type) | |
2647 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
2648 | s->size += 4; | |
2649 | } | |
13ae64f3 | 2650 | if (info->shared |
67a4f2b7 | 2651 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
2652 | || (*local_tls_type & GOT_TLS_IE)) |
2653 | { | |
2654 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 2655 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2656 | else if (GOT_TLS_GD_P (*local_tls_type) |
2657 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 2658 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2659 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2660 | htab->srelplt->size += sizeof (Elf32_External_Rel); | |
37e55690 | 2661 | } |
6725bdbf | 2662 | } |
161d71a6 L |
2663 | else |
2664 | *local_got = (bfd_vma) -1; | |
6725bdbf | 2665 | } |
252b5132 | 2666 | } |
6725bdbf | 2667 | |
13ae64f3 JJ |
2668 | if (htab->tls_ldm_got.refcount > 0) |
2669 | { | |
2670 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
2671 | relocs. */ | |
eea6121a AM |
2672 | htab->tls_ldm_got.offset = htab->sgot->size; |
2673 | htab->sgot->size += 8; | |
2674 | htab->srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
2675 | } |
2676 | else | |
2677 | htab->tls_ldm_got.offset = -1; | |
2678 | ||
0c715baa AM |
2679 | /* Allocate global sym .plt and .got entries, and space for global |
2680 | sym dynamic relocs. */ | |
eb4ff4d6 | 2681 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 2682 | |
c25bc9fc L |
2683 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2684 | htab_traverse (htab->loc_hash_table, | |
2685 | elf_i386_allocate_local_dynrelocs, | |
2686 | info); | |
2687 | ||
67a4f2b7 AO |
2688 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2689 | incremented. However, when we reserve space for TLS descriptors, | |
2690 | it's not incremented, so in order to compute the space reserved | |
2691 | for them, it suffices to multiply the reloc count by the jump | |
2692 | slot size. */ | |
2693 | if (htab->srelplt) | |
5ae0bfb6 | 2694 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; |
67a4f2b7 | 2695 | |
5a15f56f AM |
2696 | /* We now have determined the sizes of the various dynamic sections. |
2697 | Allocate memory for them. */ | |
b34976b6 | 2698 | relocs = FALSE; |
252b5132 RH |
2699 | for (s = dynobj->sections; s != NULL; s = s->next) |
2700 | { | |
eac338cf PB |
2701 | bfd_boolean strip_section = TRUE; |
2702 | ||
252b5132 RH |
2703 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
2704 | continue; | |
2705 | ||
6725bdbf AM |
2706 | if (s == htab->splt |
2707 | || s == htab->sgot | |
75ff4589 | 2708 | || s == htab->sgotplt |
cbe950e9 L |
2709 | || s == htab->iplt |
2710 | || s == htab->igotplt | |
75ff4589 | 2711 | || s == htab->sdynbss) |
252b5132 | 2712 | { |
6725bdbf AM |
2713 | /* Strip this section if we don't need it; see the |
2714 | comment below. */ | |
eac338cf PB |
2715 | /* We'd like to strip these sections if they aren't needed, but if |
2716 | we've exported dynamic symbols from them we must leave them. | |
2717 | It's too late to tell BFD to get rid of the symbols. */ | |
2718 | ||
7325306f | 2719 | if (htab->elf.hplt != NULL) |
eac338cf | 2720 | strip_section = FALSE; |
252b5132 | 2721 | } |
0112cd26 | 2722 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 2723 | { |
eac338cf | 2724 | if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2) |
b34976b6 | 2725 | relocs = TRUE; |
252b5132 | 2726 | |
0ac8d2ca AM |
2727 | /* We use the reloc_count field as a counter if we need |
2728 | to copy relocs into the output file. */ | |
5ae0bfb6 | 2729 | s->reloc_count = 0; |
252b5132 | 2730 | } |
6725bdbf | 2731 | else |
252b5132 RH |
2732 | { |
2733 | /* It's not one of our sections, so don't allocate space. */ | |
2734 | continue; | |
2735 | } | |
2736 | ||
c456f082 | 2737 | if (s->size == 0) |
252b5132 | 2738 | { |
0ac8d2ca AM |
2739 | /* If we don't need this section, strip it from the |
2740 | output file. This is mostly to handle .rel.bss and | |
2741 | .rel.plt. We must create both sections in | |
2742 | create_dynamic_sections, because they must be created | |
2743 | before the linker maps input sections to output | |
2744 | sections. The linker does that before | |
2745 | adjust_dynamic_symbol is called, and it is that | |
2746 | function which decides whether anything needs to go | |
2747 | into these sections. */ | |
c456f082 AM |
2748 | if (strip_section) |
2749 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
2750 | continue; |
2751 | } | |
2752 | ||
c456f082 AM |
2753 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2754 | continue; | |
2755 | ||
f69da49f AM |
2756 | /* Allocate memory for the section contents. We use bfd_zalloc |
2757 | here in case unused entries are not reclaimed before the | |
2758 | section's contents are written out. This should not happen, | |
2759 | but this way if it does, we get a R_386_NONE reloc instead | |
2760 | of garbage. */ | |
eea6121a | 2761 | s->contents = bfd_zalloc (dynobj, s->size); |
6725bdbf | 2762 | if (s->contents == NULL) |
b34976b6 | 2763 | return FALSE; |
252b5132 RH |
2764 | } |
2765 | ||
ebe50bae | 2766 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2767 | { |
2768 | /* Add some entries to the .dynamic section. We fill in the | |
2769 | values later, in elf_i386_finish_dynamic_sections, but we | |
2770 | must add the entries now so that we get the correct size for | |
2771 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2772 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2773 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2774 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2775 | |
36af4a4e | 2776 | if (info->executable) |
252b5132 | 2777 | { |
dc810e39 | 2778 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2779 | return FALSE; |
252b5132 RH |
2780 | } |
2781 | ||
eea6121a | 2782 | if (htab->splt->size != 0) |
252b5132 | 2783 | { |
dc810e39 AM |
2784 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2785 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2786 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
2787 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2788 | return FALSE; |
252b5132 RH |
2789 | } |
2790 | ||
2791 | if (relocs) | |
2792 | { | |
dc810e39 AM |
2793 | if (!add_dynamic_entry (DT_REL, 0) |
2794 | || !add_dynamic_entry (DT_RELSZ, 0) | |
2795 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 2796 | return FALSE; |
252b5132 | 2797 | |
0c715baa AM |
2798 | /* If any dynamic relocs apply to a read-only section, |
2799 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 2800 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
2801 | elf_link_hash_traverse (&htab->elf, |
2802 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
2803 | |
2804 | if ((info->flags & DF_TEXTREL) != 0) | |
2805 | { | |
2806 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2807 | return FALSE; |
0c715baa | 2808 | } |
252b5132 | 2809 | } |
7a2b07ff NS |
2810 | if (htab->is_vxworks |
2811 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) | |
2812 | return FALSE; | |
252b5132 | 2813 | } |
dc810e39 | 2814 | #undef add_dynamic_entry |
252b5132 | 2815 | |
b34976b6 | 2816 | return TRUE; |
252b5132 RH |
2817 | } |
2818 | ||
67a4f2b7 AO |
2819 | static bfd_boolean |
2820 | elf_i386_always_size_sections (bfd *output_bfd, | |
2821 | struct bfd_link_info *info) | |
2822 | { | |
2823 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
2824 | ||
2825 | if (tls_sec) | |
2826 | { | |
2827 | struct elf_link_hash_entry *tlsbase; | |
2828 | ||
2829 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
2830 | "_TLS_MODULE_BASE_", | |
2831 | FALSE, FALSE, FALSE); | |
2832 | ||
2833 | if (tlsbase && tlsbase->type == STT_TLS) | |
2834 | { | |
2835 | struct bfd_link_hash_entry *bh = NULL; | |
2836 | const struct elf_backend_data *bed | |
2837 | = get_elf_backend_data (output_bfd); | |
2838 | ||
2839 | if (!(_bfd_generic_link_add_one_symbol | |
2840 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2841 | tls_sec, 0, NULL, FALSE, | |
2842 | bed->collect, &bh))) | |
2843 | return FALSE; | |
9f03412a AO |
2844 | |
2845 | elf_i386_hash_table (info)->tls_module_base = bh; | |
2846 | ||
67a4f2b7 AO |
2847 | tlsbase = (struct elf_link_hash_entry *)bh; |
2848 | tlsbase->def_regular = 1; | |
2849 | tlsbase->other = STV_HIDDEN; | |
2850 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2851 | } | |
2852 | } | |
2853 | ||
2854 | return TRUE; | |
2855 | } | |
2856 | ||
38701953 AM |
2857 | /* Set the correct type for an x86 ELF section. We do this by the |
2858 | section name, which is a hack, but ought to work. */ | |
2859 | ||
b34976b6 | 2860 | static bfd_boolean |
55fd94b0 AM |
2861 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
2862 | Elf_Internal_Shdr *hdr, | |
2863 | asection *sec) | |
38701953 AM |
2864 | { |
2865 | register const char *name; | |
2866 | ||
2867 | name = bfd_get_section_name (abfd, sec); | |
2868 | ||
2869 | /* This is an ugly, but unfortunately necessary hack that is | |
2870 | needed when producing EFI binaries on x86. It tells | |
2871 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
2872 | containing ELF relocation info. We need this hack in order to | |
2873 | be able to generate ELF binaries that can be translated into | |
2874 | EFI applications (which are essentially COFF objects). Those | |
2875 | files contain a COFF ".reloc" section inside an ELFNN object, | |
2876 | which would normally cause BFD to segfault because it would | |
2877 | attempt to interpret this section as containing relocation | |
2878 | entries for section "oc". With this hack enabled, ".reloc" | |
2879 | will be treated as a normal data section, which will avoid the | |
2880 | segfault. However, you won't be able to create an ELFNN binary | |
2881 | with a section named "oc" that needs relocations, but that's | |
2882 | the kind of ugly side-effects you get when detecting section | |
2883 | types based on their names... In practice, this limitation is | |
2884 | unlikely to bite. */ | |
2885 | if (strcmp (name, ".reloc") == 0) | |
2886 | hdr->sh_type = SHT_PROGBITS; | |
2887 | ||
b34976b6 | 2888 | return TRUE; |
38701953 AM |
2889 | } |
2890 | ||
9f03412a AO |
2891 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
2892 | executables. Rather than setting it to the beginning of the TLS | |
2893 | section, we have to set it to the end. This function may be called | |
2894 | multiple times, it is idempotent. */ | |
2895 | ||
2896 | static void | |
eb4ff4d6 | 2897 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a AO |
2898 | { |
2899 | struct bfd_link_hash_entry *base; | |
2900 | ||
2901 | if (!info->executable) | |
2902 | return; | |
2903 | ||
2904 | base = elf_i386_hash_table (info)->tls_module_base; | |
2905 | ||
2906 | if (!base) | |
2907 | return; | |
2908 | ||
2909 | base->u.def.value = elf_hash_table (info)->tls_size; | |
2910 | } | |
2911 | ||
13ae64f3 JJ |
2912 | /* Return the base VMA address which should be subtracted from real addresses |
2913 | when resolving @dtpoff relocation. | |
2914 | This is PT_TLS segment p_vaddr. */ | |
2915 | ||
2916 | static bfd_vma | |
eb4ff4d6 | 2917 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 2918 | { |
e1918d23 AM |
2919 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2920 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 2921 | return 0; |
e1918d23 | 2922 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
2923 | } |
2924 | ||
2925 | /* Return the relocation value for @tpoff relocation | |
2926 | if STT_TLS virtual address is ADDRESS. */ | |
2927 | ||
2928 | static bfd_vma | |
eb4ff4d6 | 2929 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 2930 | { |
e1918d23 | 2931 | struct elf_link_hash_table *htab = elf_hash_table (info); |
13ae64f3 | 2932 | |
e1918d23 AM |
2933 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2934 | if (htab->tls_sec == NULL) | |
6a30718d | 2935 | return 0; |
e1918d23 | 2936 | return htab->tls_size + htab->tls_sec->vma - address; |
13ae64f3 JJ |
2937 | } |
2938 | ||
252b5132 RH |
2939 | /* Relocate an i386 ELF section. */ |
2940 | ||
b34976b6 | 2941 | static bfd_boolean |
55fd94b0 AM |
2942 | elf_i386_relocate_section (bfd *output_bfd, |
2943 | struct bfd_link_info *info, | |
2944 | bfd *input_bfd, | |
2945 | asection *input_section, | |
2946 | bfd_byte *contents, | |
2947 | Elf_Internal_Rela *relocs, | |
2948 | Elf_Internal_Sym *local_syms, | |
2949 | asection **local_sections) | |
252b5132 | 2950 | { |
6725bdbf | 2951 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
2952 | Elf_Internal_Shdr *symtab_hdr; |
2953 | struct elf_link_hash_entry **sym_hashes; | |
2954 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2955 | bfd_vma *local_tlsdesc_gotents; |
252b5132 RH |
2956 | Elf_Internal_Rela *rel; |
2957 | Elf_Internal_Rela *relend; | |
3348747a | 2958 | bfd_boolean is_vxworks_tls; |
252b5132 | 2959 | |
0ffa91dd NC |
2960 | BFD_ASSERT (is_i386_elf (input_bfd)); |
2961 | ||
6725bdbf | 2962 | htab = elf_i386_hash_table (info); |
0ffa91dd | 2963 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
2964 | sym_hashes = elf_sym_hashes (input_bfd); |
2965 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 2966 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
2967 | /* We have to handle relocations in vxworks .tls_vars sections |
2968 | specially, because the dynamic loader is 'weird'. */ | |
2969 | is_vxworks_tls = (htab->is_vxworks && info->shared | |
2970 | && !strcmp (input_section->output_section->name, | |
2971 | ".tls_vars")); | |
252b5132 | 2972 | |
eb4ff4d6 | 2973 | elf_i386_set_tls_module_base (info); |
9f03412a | 2974 | |
252b5132 RH |
2975 | rel = relocs; |
2976 | relend = relocs + input_section->reloc_count; | |
2977 | for (; rel < relend; rel++) | |
2978 | { | |
13ae64f3 | 2979 | unsigned int r_type; |
252b5132 RH |
2980 | reloc_howto_type *howto; |
2981 | unsigned long r_symndx; | |
2982 | struct elf_link_hash_entry *h; | |
2983 | Elf_Internal_Sym *sym; | |
2984 | asection *sec; | |
67a4f2b7 | 2985 | bfd_vma off, offplt; |
252b5132 | 2986 | bfd_vma relocation; |
b34976b6 | 2987 | bfd_boolean unresolved_reloc; |
252b5132 | 2988 | bfd_reloc_status_type r; |
1b452ec6 | 2989 | unsigned int indx; |
13ae64f3 | 2990 | int tls_type; |
252b5132 RH |
2991 | |
2992 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
2993 | if (r_type == R_386_GNU_VTINHERIT |
2994 | || r_type == R_386_GNU_VTENTRY) | |
252b5132 | 2995 | continue; |
dc47f327 | 2996 | |
55fd94b0 | 2997 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
2998 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
2999 | >= R_386_ext - R_386_standard) | |
3000 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
cbe950e9 | 3001 | >= R_386_irelative - R_386_ext)) |
252b5132 | 3002 | { |
6ba842b6 | 3003 | (*_bfd_error_handler) |
d003868e AM |
3004 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3005 | input_bfd, input_section, r_type); | |
252b5132 | 3006 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3007 | return FALSE; |
252b5132 | 3008 | } |
1b452ec6 | 3009 | howto = elf_howto_table + indx; |
252b5132 RH |
3010 | |
3011 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3012 | h = NULL; |
3013 | sym = NULL; | |
3014 | sec = NULL; | |
b34976b6 | 3015 | unresolved_reloc = FALSE; |
252b5132 RH |
3016 | if (r_symndx < symtab_hdr->sh_info) |
3017 | { | |
3018 | sym = local_syms + r_symndx; | |
3019 | sec = local_sections[r_symndx]; | |
3020 | relocation = (sec->output_section->vma | |
3021 | + sec->output_offset | |
3022 | + sym->st_value); | |
ab96bf03 AM |
3023 | |
3024 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3025 | && ((sec->flags & SEC_MERGE) != 0 | |
3026 | || (info->relocatable | |
3027 | && sec->output_offset != 0))) | |
f8df10f4 | 3028 | { |
f8df10f4 | 3029 | bfd_vma addend; |
4a335f3d | 3030 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3031 | |
4a335f3d | 3032 | switch (howto->size) |
f8df10f4 | 3033 | { |
4a335f3d AM |
3034 | case 0: |
3035 | addend = bfd_get_8 (input_bfd, where); | |
3036 | if (howto->pc_relative) | |
3037 | { | |
3038 | addend = (addend ^ 0x80) - 0x80; | |
3039 | addend += 1; | |
3040 | } | |
3041 | break; | |
3042 | case 1: | |
3043 | addend = bfd_get_16 (input_bfd, where); | |
3044 | if (howto->pc_relative) | |
3045 | { | |
3046 | addend = (addend ^ 0x8000) - 0x8000; | |
3047 | addend += 2; | |
3048 | } | |
3049 | break; | |
3050 | case 2: | |
3051 | addend = bfd_get_32 (input_bfd, where); | |
3052 | if (howto->pc_relative) | |
3053 | { | |
3054 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3055 | addend += 4; | |
3056 | } | |
3057 | break; | |
3058 | default: | |
3059 | abort (); | |
f8df10f4 JJ |
3060 | } |
3061 | ||
ab96bf03 AM |
3062 | if (info->relocatable) |
3063 | addend += sec->output_offset; | |
3064 | else | |
3065 | { | |
3066 | asection *msec = sec; | |
3067 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3068 | addend); | |
3069 | addend -= relocation; | |
3070 | addend += msec->output_section->vma + msec->output_offset; | |
3071 | } | |
4a335f3d AM |
3072 | |
3073 | switch (howto->size) | |
3074 | { | |
3075 | case 0: | |
16a10388 | 3076 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3077 | if (howto->pc_relative) |
3078 | addend -= 1; | |
3079 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3080 | break; |
3081 | case 1: | |
3082 | if (howto->pc_relative) | |
3083 | addend -= 2; | |
3084 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3085 | break; |
3086 | case 2: | |
3087 | if (howto->pc_relative) | |
3088 | addend -= 4; | |
3089 | bfd_put_32 (input_bfd, addend, where); | |
3090 | break; | |
3091 | } | |
f8df10f4 | 3092 | } |
c25bc9fc L |
3093 | else if (ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
3094 | { | |
3095 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
3096 | h = elf_i386_get_local_sym_hash (htab, input_bfd, | |
3097 | rel, FALSE); | |
3098 | if (h == NULL) | |
3099 | abort (); | |
3100 | ||
3101 | /* Set STT_GNU_IFUNC symbol value. */ | |
3102 | h->root.u.def.value = sym->st_value; | |
3103 | h->root.u.def.section = sec; | |
3104 | } | |
252b5132 RH |
3105 | } |
3106 | else | |
3107 | { | |
560e09e9 | 3108 | bfd_boolean warned; |
ffb2e45b | 3109 | |
b2a8e766 AM |
3110 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3111 | r_symndx, symtab_hdr, sym_hashes, | |
3112 | h, sec, relocation, | |
3113 | unresolved_reloc, warned); | |
252b5132 RH |
3114 | } |
3115 | ||
ab96bf03 | 3116 | if (sec != NULL && elf_discarded_section (sec)) |
9635fe29 | 3117 | { |
ab96bf03 AM |
3118 | /* For relocs against symbols from removed linkonce sections, |
3119 | or sections discarded by a linker script, we just want the | |
3120 | section contents zeroed. Avoid any special processing. */ | |
b1e24c02 | 3121 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); |
ab96bf03 AM |
3122 | rel->r_info = 0; |
3123 | rel->r_addend = 0; | |
b1e24c02 | 3124 | continue; |
9635fe29 AM |
3125 | } |
3126 | ||
ab96bf03 AM |
3127 | if (info->relocatable) |
3128 | continue; | |
3129 | ||
cbe950e9 L |
3130 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3131 | it here if it is defined in a non-shared object. */ | |
3132 | if (h != NULL | |
3133 | && h->type == STT_GNU_IFUNC | |
3134 | && h->def_regular) | |
3135 | { | |
3136 | asection *plt, *gotplt, *base_got; | |
3137 | bfd_vma plt_index; | |
3138 | ||
3139 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3140 | || h->plt.offset == (bfd_vma) -1) | |
3141 | abort (); | |
3142 | ||
3143 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
3144 | if (htab->splt != NULL) | |
3145 | { | |
3146 | plt = htab->splt; | |
3147 | gotplt = htab->sgotplt; | |
3148 | } | |
3149 | else | |
3150 | { | |
3151 | plt = htab->iplt; | |
3152 | gotplt = htab->igotplt; | |
3153 | } | |
3154 | ||
3155 | relocation = (plt->output_section->vma | |
3156 | + plt->output_offset + h->plt.offset); | |
3157 | ||
3158 | switch (r_type) | |
3159 | { | |
3160 | default: | |
3161 | (*_bfd_error_handler) | |
3162 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3163 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3164 | elf_howto_table[r_type].name, | |
3165 | h->root.root.string, __FUNCTION__); | |
3166 | bfd_set_error (bfd_error_bad_value); | |
3167 | return FALSE; | |
3168 | ||
3169 | case R_386_32: | |
710ab287 L |
3170 | /* Generate dynamic relcoation only when there is a |
3171 | non-GOF reference in a shared object. */ | |
3172 | if (info->shared && h->non_got_ref) | |
3173 | { | |
3174 | Elf_Internal_Rela outrel; | |
3175 | bfd_byte *loc; | |
3176 | asection *sreloc; | |
3177 | bfd_vma offset; | |
3178 | ||
c25bc9fc L |
3179 | /* Need a dynamic relocation to get the real function |
3180 | adddress. */ | |
710ab287 L |
3181 | offset = _bfd_elf_section_offset (output_bfd, |
3182 | info, | |
3183 | input_section, | |
3184 | rel->r_offset); | |
3185 | if (offset == (bfd_vma) -1 | |
3186 | || offset == (bfd_vma) -2) | |
3187 | abort (); | |
3188 | ||
3189 | outrel.r_offset = (input_section->output_section->vma | |
3190 | + input_section->output_offset | |
3191 | + offset); | |
3192 | ||
3193 | if (h->dynindx == -1 | |
3194 | || h->forced_local) | |
3195 | { | |
3196 | /* This symbol is resolved locally. */ | |
3197 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
3198 | bfd_put_32 (output_bfd, | |
3199 | (h->root.u.def.value | |
3200 | + h->root.u.def.section->output_section->vma | |
3201 | + h->root.u.def.section->output_offset), | |
3202 | contents + offset); | |
3203 | } | |
3204 | else | |
3205 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); | |
3206 | ||
2a81c24a | 3207 | sreloc = htab->irelifunc; |
710ab287 L |
3208 | loc = sreloc->contents; |
3209 | loc += (sreloc->reloc_count++ | |
3210 | * sizeof (Elf32_External_Rel)); | |
3211 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
3212 | ||
3213 | /* If this reloc is against an external symbol, we | |
3214 | do not want to fiddle with the addend. Otherwise, | |
3215 | we need to include the symbol value so that it | |
3216 | becomes an addend for the dynamic reloc. For an | |
3217 | internal symbol, we have updated addend. */ | |
3218 | continue; | |
3219 | } | |
3220 | ||
cbe950e9 L |
3221 | case R_386_PC32: |
3222 | case R_386_PLT32: | |
3223 | goto do_relocation; | |
3224 | ||
3225 | case R_386_GOT32: | |
3226 | base_got = htab->sgot; | |
3227 | off = h->got.offset; | |
3228 | ||
7afd84dc | 3229 | if (base_got == NULL) |
cbe950e9 L |
3230 | abort (); |
3231 | ||
7afd84dc | 3232 | if (off == (bfd_vma) -1) |
cbe950e9 | 3233 | { |
7afd84dc L |
3234 | /* We can't use h->got.offset here to save state, or |
3235 | even just remember the offset, as finish_dynamic_symbol | |
3236 | would use that as offset into .got. */ | |
3237 | ||
3238 | if (htab->splt != NULL) | |
3239 | { | |
3240 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3241 | off = (plt_index + 3) * 4; | |
3242 | base_got = htab->sgotplt; | |
3243 | } | |
cbe950e9 L |
3244 | else |
3245 | { | |
7afd84dc L |
3246 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
3247 | off = plt_index * 4; | |
3248 | base_got = htab->igotplt; | |
3249 | } | |
3250 | ||
3251 | if (h->dynindx == -1 | |
3252 | || h->forced_local | |
3253 | || info->symbolic) | |
3254 | { | |
3255 | /* This references the local defitionion. We must | |
3256 | initialize this entry in the global offset table. | |
3257 | Since the offset must always be a multiple of 8, | |
3258 | we use the least significant bit to record | |
3259 | whether we have initialized it already. | |
3260 | ||
3261 | When doing a dynamic link, we create a .rela.got | |
3262 | relocation entry to initialize the value. This | |
3263 | is done in the finish_dynamic_symbol routine. */ | |
3264 | if ((off & 1) != 0) | |
3265 | off &= ~1; | |
3266 | else | |
3267 | { | |
3268 | bfd_put_32 (output_bfd, relocation, | |
3269 | base_got->contents + off); | |
3270 | h->got.offset |= 1; | |
3271 | } | |
cbe950e9 | 3272 | } |
cbe950e9 | 3273 | |
7afd84dc | 3274 | relocation = off; |
cbe950e9 | 3275 | |
7afd84dc L |
3276 | /* Adjust for static executables. */ |
3277 | if (htab->splt == NULL) | |
3278 | relocation += gotplt->output_offset; | |
3279 | } | |
3280 | else | |
0018b0a3 L |
3281 | { |
3282 | relocation = (base_got->output_section->vma | |
3283 | + base_got->output_offset + off | |
3284 | - gotplt->output_section->vma | |
3285 | - gotplt->output_offset); | |
3286 | /* Adjust for static executables. */ | |
3287 | if (htab->splt == NULL) | |
3288 | relocation += gotplt->output_offset; | |
3289 | } | |
3290 | ||
cbe950e9 L |
3291 | goto do_relocation; |
3292 | ||
3293 | case R_386_GOTOFF: | |
3294 | relocation -= (gotplt->output_section->vma | |
3295 | + gotplt->output_offset); | |
3296 | goto do_relocation; | |
3297 | } | |
3298 | } | |
3299 | ||
252b5132 RH |
3300 | switch (r_type) |
3301 | { | |
3302 | case R_386_GOT32: | |
3303 | /* Relocation is to the entry for this symbol in the global | |
3304 | offset table. */ | |
ffb2e45b AM |
3305 | if (htab->sgot == NULL) |
3306 | abort (); | |
252b5132 RH |
3307 | |
3308 | if (h != NULL) | |
3309 | { | |
b34976b6 | 3310 | bfd_boolean dyn; |
252b5132 RH |
3311 | |
3312 | off = h->got.offset; | |
ebe50bae | 3313 | dyn = htab->elf.dynamic_sections_created; |
26e41594 | 3314 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
252b5132 | 3315 | || (info->shared |
586119b3 | 3316 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
3317 | || (ELF_ST_VISIBILITY (h->other) |
3318 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3319 | { |
3320 | /* This is actually a static link, or it is a | |
3321 | -Bsymbolic link and the symbol is defined | |
3322 | locally, or the symbol was forced to be local | |
3323 | because of a version file. We must initialize | |
3324 | this entry in the global offset table. Since the | |
3325 | offset must always be a multiple of 4, we use the | |
3326 | least significant bit to record whether we have | |
3327 | initialized it already. | |
3328 | ||
3329 | When doing a dynamic link, we create a .rel.got | |
3330 | relocation entry to initialize the value. This | |
3331 | is done in the finish_dynamic_symbol routine. */ | |
3332 | if ((off & 1) != 0) | |
3333 | off &= ~1; | |
3334 | else | |
3335 | { | |
3336 | bfd_put_32 (output_bfd, relocation, | |
6725bdbf | 3337 | htab->sgot->contents + off); |
252b5132 RH |
3338 | h->got.offset |= 1; |
3339 | } | |
3340 | } | |
8c694914 | 3341 | else |
b34976b6 | 3342 | unresolved_reloc = FALSE; |
252b5132 RH |
3343 | } |
3344 | else | |
3345 | { | |
ffb2e45b AM |
3346 | if (local_got_offsets == NULL) |
3347 | abort (); | |
252b5132 RH |
3348 | |
3349 | off = local_got_offsets[r_symndx]; | |
3350 | ||
3351 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
3352 | the least significant bit to record whether we have |
3353 | already generated the necessary reloc. */ | |
252b5132 RH |
3354 | if ((off & 1) != 0) |
3355 | off &= ~1; | |
3356 | else | |
3357 | { | |
6725bdbf AM |
3358 | bfd_put_32 (output_bfd, relocation, |
3359 | htab->sgot->contents + off); | |
252b5132 RH |
3360 | |
3361 | if (info->shared) | |
3362 | { | |
947216bf AM |
3363 | asection *s; |
3364 | Elf_Internal_Rela outrel; | |
3365 | bfd_byte *loc; | |
252b5132 | 3366 | |
947216bf AM |
3367 | s = htab->srelgot; |
3368 | if (s == NULL) | |
ffb2e45b | 3369 | abort (); |
252b5132 | 3370 | |
6725bdbf AM |
3371 | outrel.r_offset = (htab->sgot->output_section->vma |
3372 | + htab->sgot->output_offset | |
252b5132 RH |
3373 | + off); |
3374 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
947216bf AM |
3375 | loc = s->contents; |
3376 | loc += s->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 3377 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
3378 | } |
3379 | ||
3380 | local_got_offsets[r_symndx] |= 1; | |
3381 | } | |
252b5132 RH |
3382 | } |
3383 | ||
ffb2e45b AM |
3384 | if (off >= (bfd_vma) -2) |
3385 | abort (); | |
3386 | ||
8c37241b JJ |
3387 | relocation = htab->sgot->output_section->vma |
3388 | + htab->sgot->output_offset + off | |
3389 | - htab->sgotplt->output_section->vma | |
3390 | - htab->sgotplt->output_offset; | |
252b5132 RH |
3391 | break; |
3392 | ||
3393 | case R_386_GOTOFF: | |
3394 | /* Relocation is relative to the start of the global offset | |
3395 | table. */ | |
3396 | ||
90f487df L |
3397 | /* Check to make sure it isn't a protected function symbol |
3398 | for shared library since it may not be local when used | |
41bed6dd L |
3399 | as function address. We also need to make sure that a |
3400 | symbol is defined locally. */ | |
3401 | if (info->shared && h) | |
90f487df | 3402 | { |
41bed6dd L |
3403 | if (!h->def_regular) |
3404 | { | |
3405 | const char *v; | |
3406 | ||
3407 | switch (ELF_ST_VISIBILITY (h->other)) | |
3408 | { | |
3409 | case STV_HIDDEN: | |
3410 | v = _("hidden symbol"); | |
3411 | break; | |
3412 | case STV_INTERNAL: | |
3413 | v = _("internal symbol"); | |
3414 | break; | |
3415 | case STV_PROTECTED: | |
3416 | v = _("protected symbol"); | |
3417 | break; | |
3418 | default: | |
3419 | v = _("symbol"); | |
3420 | break; | |
3421 | } | |
3422 | ||
3423 | (*_bfd_error_handler) | |
3424 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), | |
3425 | input_bfd, v, h->root.root.string); | |
3426 | bfd_set_error (bfd_error_bad_value); | |
3427 | return FALSE; | |
3428 | } | |
3429 | else if (!info->executable | |
3430 | && h->type == STT_FUNC | |
3431 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3432 | { | |
3433 | (*_bfd_error_handler) | |
3434 | (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"), | |
3435 | input_bfd, h->root.root.string); | |
3436 | bfd_set_error (bfd_error_bad_value); | |
3437 | return FALSE; | |
3438 | } | |
90f487df L |
3439 | } |
3440 | ||
8c37241b JJ |
3441 | /* Note that sgot is not involved in this |
3442 | calculation. We always want the start of .got.plt. If we | |
3443 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
3444 | permitted by the ABI, we might have to change this |
3445 | calculation. */ | |
8c37241b JJ |
3446 | relocation -= htab->sgotplt->output_section->vma |
3447 | + htab->sgotplt->output_offset; | |
252b5132 RH |
3448 | break; |
3449 | ||
3450 | case R_386_GOTPC: | |
3451 | /* Use global offset table as symbol value. */ | |
8c37241b JJ |
3452 | relocation = htab->sgotplt->output_section->vma |
3453 | + htab->sgotplt->output_offset; | |
b34976b6 | 3454 | unresolved_reloc = FALSE; |
252b5132 RH |
3455 | break; |
3456 | ||
3457 | case R_386_PLT32: | |
3458 | /* Relocation is to the entry for this symbol in the | |
3459 | procedure linkage table. */ | |
3460 | ||
dd5724d5 | 3461 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 3462 | without using the procedure linkage table. */ |
252b5132 RH |
3463 | if (h == NULL) |
3464 | break; | |
3465 | ||
dd5724d5 | 3466 | if (h->plt.offset == (bfd_vma) -1 |
6725bdbf | 3467 | || htab->splt == NULL) |
252b5132 RH |
3468 | { |
3469 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
3470 | happens when statically linking PIC code, or when |
3471 | using -Bsymbolic. */ | |
252b5132 RH |
3472 | break; |
3473 | } | |
3474 | ||
6725bdbf AM |
3475 | relocation = (htab->splt->output_section->vma |
3476 | + htab->splt->output_offset | |
252b5132 | 3477 | + h->plt.offset); |
b34976b6 | 3478 | unresolved_reloc = FALSE; |
252b5132 RH |
3479 | break; |
3480 | ||
3481 | case R_386_32: | |
3482 | case R_386_PC32: | |
3348747a NS |
3483 | if ((input_section->flags & SEC_ALLOC) == 0 |
3484 | || is_vxworks_tls) | |
ec338859 AM |
3485 | break; |
3486 | ||
12d0ee4a | 3487 | if ((info->shared |
ef5aade5 L |
3488 | && (h == NULL |
3489 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3490 | || h->root.type != bfd_link_hash_undefweak) | |
12d0ee4a | 3491 | && (r_type != R_386_PC32 |
f6c52c13 | 3492 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 AM |
3493 | || (ELIMINATE_COPY_RELOCS |
3494 | && !info->shared | |
12d0ee4a AM |
3495 | && h != NULL |
3496 | && h->dynindx != -1 | |
f5385ebf AM |
3497 | && !h->non_got_ref |
3498 | && ((h->def_dynamic | |
3499 | && !h->def_regular) | |
28d0b90e | 3500 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3501 | || h->root.type == bfd_link_hash_undefined))) |
252b5132 | 3502 | { |
947216bf AM |
3503 | Elf_Internal_Rela outrel; |
3504 | bfd_byte *loc; | |
b34976b6 | 3505 | bfd_boolean skip, relocate; |
0c715baa | 3506 | asection *sreloc; |
252b5132 RH |
3507 | |
3508 | /* When generating a shared object, these relocations | |
3509 | are copied into the output file to be resolved at run | |
3510 | time. */ | |
3511 | ||
b34976b6 AM |
3512 | skip = FALSE; |
3513 | relocate = FALSE; | |
252b5132 | 3514 | |
c629eae0 JJ |
3515 | outrel.r_offset = |
3516 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3517 | rel->r_offset); | |
3518 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 3519 | skip = TRUE; |
0bb2d96a | 3520 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3521 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
3522 | outrel.r_offset += (input_section->output_section->vma |
3523 | + input_section->output_offset); | |
3524 | ||
3525 | if (skip) | |
0bb2d96a | 3526 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
3527 | else if (h != NULL |
3528 | && h->dynindx != -1 | |
3529 | && (r_type == R_386_PC32 | |
3530 | || !info->shared | |
55255dae | 3531 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 3532 | || !h->def_regular)) |
0bb2d96a | 3533 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
3534 | else |
3535 | { | |
5a15f56f | 3536 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 3537 | relocate = TRUE; |
5a15f56f | 3538 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
3539 | } |
3540 | ||
cbe950e9 | 3541 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 NC |
3542 | |
3543 | BFD_ASSERT (sreloc != NULL && sreloc->contents != NULL); | |
0c715baa | 3544 | |
947216bf AM |
3545 | loc = sreloc->contents; |
3546 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
e7c33416 | 3547 | |
0c715baa | 3548 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
3549 | |
3550 | /* If this reloc is against an external symbol, we do | |
3551 | not want to fiddle with the addend. Otherwise, we | |
3552 | need to include the symbol value so that it becomes | |
3553 | an addend for the dynamic reloc. */ | |
0f88be7a | 3554 | if (! relocate) |
252b5132 RH |
3555 | continue; |
3556 | } | |
252b5132 RH |
3557 | break; |
3558 | ||
37e55690 JJ |
3559 | case R_386_TLS_IE: |
3560 | if (info->shared) | |
3561 | { | |
947216bf AM |
3562 | Elf_Internal_Rela outrel; |
3563 | bfd_byte *loc; | |
37e55690 | 3564 | asection *sreloc; |
37e55690 JJ |
3565 | |
3566 | outrel.r_offset = rel->r_offset | |
3567 | + input_section->output_section->vma | |
3568 | + input_section->output_offset; | |
3569 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
3570 | sreloc = elf_section_data (input_section)->sreloc; | |
3571 | if (sreloc == NULL) | |
3572 | abort (); | |
947216bf AM |
3573 | loc = sreloc->contents; |
3574 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
37e55690 JJ |
3575 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3576 | } | |
3577 | /* Fall through */ | |
3578 | ||
13ae64f3 | 3579 | case R_386_TLS_GD: |
67a4f2b7 AO |
3580 | case R_386_TLS_GOTDESC: |
3581 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 3582 | case R_386_TLS_IE_32: |
37e55690 | 3583 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
3584 | tls_type = GOT_UNKNOWN; |
3585 | if (h == NULL && local_got_offsets) | |
3586 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
3587 | else if (h != NULL) | |
142411ca | 3588 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
3589 | if (tls_type == GOT_TLS_IE) |
3590 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
3591 | |
3592 | if (! elf_i386_tls_transition (info, input_bfd, | |
3593 | input_section, contents, | |
3594 | symtab_hdr, sym_hashes, | |
3595 | &r_type, tls_type, rel, | |
3596 | relend, h)) | |
3597 | return FALSE; | |
13ae64f3 JJ |
3598 | |
3599 | if (r_type == R_386_TLS_LE_32) | |
3600 | { | |
82e51918 | 3601 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
3602 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
3603 | { | |
142411ca | 3604 | unsigned int type; |
13ae64f3 JJ |
3605 | bfd_vma roff; |
3606 | ||
3607 | /* GD->LE transition. */ | |
13ae64f3 | 3608 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
3609 | if (type == 0x04) |
3610 | { | |
3611 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
3612 | Change it into: | |
3613 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3614 | (6 byte form of subl). */ | |
13ae64f3 JJ |
3615 | memcpy (contents + rel->r_offset - 3, |
3616 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
142411ca | 3617 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
3618 | } |
3619 | else | |
3620 | { | |
142411ca L |
3621 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop |
3622 | Change it into: | |
3623 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3624 | (6 byte form of subl). */ | |
3625 | memcpy (contents + rel->r_offset - 2, | |
3626 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
3627 | roff = rel->r_offset + 6; | |
13ae64f3 | 3628 | } |
eb4ff4d6 | 3629 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 3630 | contents + roff); |
a3fadc9a | 3631 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
3632 | rel++; |
3633 | continue; | |
3634 | } | |
67a4f2b7 AO |
3635 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
3636 | { | |
3637 | /* GDesc -> LE transition. | |
3638 | It's originally something like: | |
3639 | leal x@tlsdesc(%ebx), %eax | |
3640 | ||
3641 | leal x@ntpoff, %eax | |
3642 | ||
3643 | Registers other than %eax may be set up here. */ | |
3644 | ||
142411ca | 3645 | unsigned int val; |
67a4f2b7 AO |
3646 | bfd_vma roff; |
3647 | ||
67a4f2b7 | 3648 | roff = rel->r_offset; |
67a4f2b7 | 3649 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3650 | |
3651 | /* Now modify the instruction as appropriate. */ | |
3652 | /* aoliva FIXME: remove the above and xor the byte | |
3653 | below with 0x86. */ | |
3654 | bfd_put_8 (output_bfd, val ^ 0x86, | |
3655 | contents + roff - 1); | |
eb4ff4d6 | 3656 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
3657 | contents + roff); |
3658 | continue; | |
3659 | } | |
3660 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
3661 | { | |
3662 | /* GDesc -> LE transition. | |
3663 | It's originally: | |
3664 | call *(%eax) | |
3665 | Turn it into: | |
142411ca | 3666 | xchg %ax,%ax */ |
67a4f2b7 | 3667 | |
67a4f2b7 | 3668 | bfd_vma roff; |
142411ca | 3669 | |
67a4f2b7 | 3670 | roff = rel->r_offset; |
10efb593 | 3671 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3672 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3673 | continue; | |
3674 | } | |
37e55690 | 3675 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 3676 | { |
142411ca | 3677 | unsigned int val; |
13ae64f3 JJ |
3678 | |
3679 | /* IE->LE transition: | |
37e55690 JJ |
3680 | Originally it can be one of: |
3681 | movl foo, %eax | |
3682 | movl foo, %reg | |
3683 | addl foo, %reg | |
3684 | We change it into: | |
3685 | movl $foo, %eax | |
3686 | movl $foo, %reg | |
3687 | addl $foo, %reg. */ | |
37e55690 | 3688 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
3689 | if (val == 0xa1) |
3690 | { | |
3691 | /* movl foo, %eax. */ | |
55fd94b0 AM |
3692 | bfd_put_8 (output_bfd, 0xb8, |
3693 | contents + rel->r_offset - 1); | |
37e55690 | 3694 | } |
299bf759 | 3695 | else |
37e55690 | 3696 | { |
142411ca L |
3697 | unsigned int type; |
3698 | ||
55fd94b0 AM |
3699 | type = bfd_get_8 (input_bfd, |
3700 | contents + rel->r_offset - 2); | |
299bf759 | 3701 | switch (type) |
26e41594 | 3702 | { |
299bf759 L |
3703 | case 0x8b: |
3704 | /* movl */ | |
299bf759 L |
3705 | bfd_put_8 (output_bfd, 0xc7, |
3706 | contents + rel->r_offset - 2); | |
3707 | bfd_put_8 (output_bfd, | |
3708 | 0xc0 | ((val >> 3) & 7), | |
3709 | contents + rel->r_offset - 1); | |
3710 | break; | |
3711 | case 0x03: | |
3712 | /* addl */ | |
299bf759 L |
3713 | bfd_put_8 (output_bfd, 0x81, |
3714 | contents + rel->r_offset - 2); | |
3715 | bfd_put_8 (output_bfd, | |
3716 | 0xc0 | ((val >> 3) & 7), | |
3717 | contents + rel->r_offset - 1); | |
3718 | break; | |
3719 | default: | |
3720 | BFD_FAIL (); | |
3721 | break; | |
26e41594 | 3722 | } |
37e55690 | 3723 | } |
eb4ff4d6 | 3724 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3725 | contents + rel->r_offset); |
3726 | continue; | |
3727 | } | |
3728 | else | |
3729 | { | |
3730 | unsigned int val, type; | |
3731 | ||
3732 | /* {IE_32,GOTIE}->LE transition: | |
3733 | Originally it can be one of: | |
13ae64f3 | 3734 | subl foo(%reg1), %reg2 |
13ae64f3 | 3735 | movl foo(%reg1), %reg2 |
37e55690 | 3736 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
3737 | We change it into: |
3738 | subl $foo, %reg2 | |
37e55690 JJ |
3739 | movl $foo, %reg2 (6 byte form) |
3740 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
3741 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
3742 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3743 | if (type == 0x8b) |
3744 | { | |
3745 | /* movl */ | |
13ae64f3 JJ |
3746 | bfd_put_8 (output_bfd, 0xc7, |
3747 | contents + rel->r_offset - 2); | |
3748 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3749 | contents + rel->r_offset - 1); | |
3750 | } | |
3751 | else if (type == 0x2b) | |
3752 | { | |
3753 | /* subl */ | |
13ae64f3 JJ |
3754 | bfd_put_8 (output_bfd, 0x81, |
3755 | contents + rel->r_offset - 2); | |
3756 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
3757 | contents + rel->r_offset - 1); | |
3758 | } | |
37e55690 JJ |
3759 | else if (type == 0x03) |
3760 | { | |
3761 | /* addl */ | |
3762 | bfd_put_8 (output_bfd, 0x81, | |
3763 | contents + rel->r_offset - 2); | |
3764 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3765 | contents + rel->r_offset - 1); | |
3766 | } | |
13ae64f3 JJ |
3767 | else |
3768 | BFD_FAIL (); | |
37e55690 | 3769 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 3770 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3771 | contents + rel->r_offset); |
3772 | else | |
eb4ff4d6 | 3773 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 3774 | contents + rel->r_offset); |
13ae64f3 JJ |
3775 | continue; |
3776 | } | |
3777 | } | |
3778 | ||
3779 | if (htab->sgot == NULL) | |
3780 | abort (); | |
3781 | ||
3782 | if (h != NULL) | |
67a4f2b7 AO |
3783 | { |
3784 | off = h->got.offset; | |
3785 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
3786 | } | |
13ae64f3 JJ |
3787 | else |
3788 | { | |
3789 | if (local_got_offsets == NULL) | |
3790 | abort (); | |
3791 | ||
3792 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3793 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
3794 | } |
3795 | ||
3796 | if ((off & 1) != 0) | |
3797 | off &= ~1; | |
26e41594 | 3798 | else |
13ae64f3 | 3799 | { |
947216bf AM |
3800 | Elf_Internal_Rela outrel; |
3801 | bfd_byte *loc; | |
13ae64f3 | 3802 | int dr_type, indx; |
67a4f2b7 | 3803 | asection *sreloc; |
13ae64f3 JJ |
3804 | |
3805 | if (htab->srelgot == NULL) | |
3806 | abort (); | |
3807 | ||
67a4f2b7 AO |
3808 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3809 | ||
3810 | if (GOT_TLS_GDESC_P (tls_type)) | |
3811 | { | |
3812 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); | |
3813 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
3814 | <= htab->sgotplt->size); | |
3815 | outrel.r_offset = (htab->sgotplt->output_section->vma | |
3816 | + htab->sgotplt->output_offset | |
3817 | + offplt | |
3818 | + htab->sgotplt_jump_table_size); | |
3819 | sreloc = htab->srelplt; | |
3820 | loc = sreloc->contents; | |
5ae0bfb6 RS |
3821 | loc += (htab->next_tls_desc_index++ |
3822 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 AO |
3823 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
3824 | <= sreloc->contents + sreloc->size); | |
3825 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
3826 | if (indx == 0) | |
3827 | { | |
3828 | BFD_ASSERT (! unresolved_reloc); | |
3829 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 3830 | relocation - elf_i386_dtpoff_base (info), |
67a4f2b7 AO |
3831 | htab->sgotplt->contents + offplt |
3832 | + htab->sgotplt_jump_table_size + 4); | |
3833 | } | |
3834 | else | |
3835 | { | |
3836 | bfd_put_32 (output_bfd, 0, | |
3837 | htab->sgotplt->contents + offplt | |
3838 | + htab->sgotplt_jump_table_size + 4); | |
3839 | } | |
3840 | } | |
3841 | ||
3842 | sreloc = htab->srelgot; | |
3843 | ||
13ae64f3 JJ |
3844 | outrel.r_offset = (htab->sgot->output_section->vma |
3845 | + htab->sgot->output_offset + off); | |
3846 | ||
67a4f2b7 | 3847 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 3848 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
3849 | else if (GOT_TLS_GDESC_P (tls_type)) |
3850 | goto dr_done; | |
37e55690 JJ |
3851 | else if (tls_type == GOT_TLS_IE_POS) |
3852 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
3853 | else |
3854 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 3855 | |
37e55690 | 3856 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
3857 | bfd_put_32 (output_bfd, |
3858 | relocation - elf_i386_dtpoff_base (info), | |
37e55690 JJ |
3859 | htab->sgot->contents + off); |
3860 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) | |
eb4ff4d6 L |
3861 | bfd_put_32 (output_bfd, |
3862 | elf_i386_dtpoff_base (info) - relocation, | |
c366c25e | 3863 | htab->sgot->contents + off); |
67a4f2b7 | 3864 | else if (dr_type != R_386_TLS_DESC) |
c366c25e JJ |
3865 | bfd_put_32 (output_bfd, 0, |
3866 | htab->sgot->contents + off); | |
13ae64f3 | 3867 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 AO |
3868 | |
3869 | loc = sreloc->contents; | |
3870 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
3871 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) | |
3872 | <= sreloc->contents + sreloc->size); | |
13ae64f3 JJ |
3873 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3874 | ||
67a4f2b7 | 3875 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
3876 | { |
3877 | if (indx == 0) | |
3878 | { | |
82e51918 | 3879 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 3880 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 3881 | relocation - elf_i386_dtpoff_base (info), |
13ae64f3 JJ |
3882 | htab->sgot->contents + off + 4); |
3883 | } | |
3884 | else | |
3885 | { | |
3886 | bfd_put_32 (output_bfd, 0, | |
3887 | htab->sgot->contents + off + 4); | |
3888 | outrel.r_info = ELF32_R_INFO (indx, | |
3889 | R_386_TLS_DTPOFF32); | |
3890 | outrel.r_offset += 4; | |
67a4f2b7 | 3891 | sreloc->reloc_count++; |
947216bf | 3892 | loc += sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
3893 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
3894 | <= sreloc->contents + sreloc->size); | |
947216bf | 3895 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
13ae64f3 JJ |
3896 | } |
3897 | } | |
37e55690 JJ |
3898 | else if (tls_type == GOT_TLS_IE_BOTH) |
3899 | { | |
3900 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
3901 | (indx == 0 |
3902 | ? relocation - elf_i386_dtpoff_base (info) | |
3903 | : 0), | |
37e55690 JJ |
3904 | htab->sgot->contents + off + 4); |
3905 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
3906 | outrel.r_offset += 4; | |
67a4f2b7 | 3907 | sreloc->reloc_count++; |
947216bf | 3908 | loc += sizeof (Elf32_External_Rel); |
37e55690 JJ |
3909 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3910 | } | |
13ae64f3 | 3911 | |
67a4f2b7 | 3912 | dr_done: |
13ae64f3 JJ |
3913 | if (h != NULL) |
3914 | h->got.offset |= 1; | |
3915 | else | |
3916 | local_got_offsets[r_symndx] |= 1; | |
3917 | } | |
3918 | ||
67a4f2b7 AO |
3919 | if (off >= (bfd_vma) -2 |
3920 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 3921 | abort (); |
67a4f2b7 AO |
3922 | if (r_type == R_386_TLS_GOTDESC |
3923 | || r_type == R_386_TLS_DESC_CALL) | |
3924 | { | |
3925 | relocation = htab->sgotplt_jump_table_size + offplt; | |
3926 | unresolved_reloc = FALSE; | |
3927 | } | |
3928 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 3929 | { |
8c37241b JJ |
3930 | bfd_vma g_o_t = htab->sgotplt->output_section->vma |
3931 | + htab->sgotplt->output_offset; | |
3932 | relocation = htab->sgot->output_section->vma | |
67a4f2b7 | 3933 | + htab->sgot->output_offset + off - g_o_t; |
37e55690 JJ |
3934 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
3935 | && tls_type == GOT_TLS_IE_BOTH) | |
3936 | relocation += 4; | |
3937 | if (r_type == R_386_TLS_IE) | |
8c37241b | 3938 | relocation += g_o_t; |
b34976b6 | 3939 | unresolved_reloc = FALSE; |
13ae64f3 | 3940 | } |
67a4f2b7 | 3941 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
3942 | { |
3943 | unsigned int val, type; | |
3944 | bfd_vma roff; | |
3945 | ||
3946 | /* GD->IE transition. */ | |
13ae64f3 | 3947 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
3948 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
3949 | if (type == 0x04) | |
3950 | { | |
3951 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
3952 | Change it into: | |
3953 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 | 3954 | val >>= 3; |
142411ca | 3955 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
3956 | } |
3957 | else | |
3958 | { | |
3959 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
3960 | Change it into: | |
3961 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
3962 | roff = rel->r_offset - 2; |
3963 | } | |
3964 | memcpy (contents + roff, | |
3965 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
3966 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
3967 | /* If foo is used only with foo@gotntpoff(%reg) and |
3968 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
3969 | subl $foo@gottpoff(%reg), %eax | |
3970 | into: | |
3971 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
3972 | if (tls_type == GOT_TLS_IE_POS) |
3973 | contents[roff + 6] = 0x03; | |
8c37241b JJ |
3974 | bfd_put_32 (output_bfd, |
3975 | htab->sgot->output_section->vma | |
3976 | + htab->sgot->output_offset + off | |
3977 | - htab->sgotplt->output_section->vma | |
3978 | - htab->sgotplt->output_offset, | |
13ae64f3 JJ |
3979 | contents + roff + 8); |
3980 | /* Skip R_386_PLT32. */ | |
3981 | rel++; | |
3982 | continue; | |
3983 | } | |
67a4f2b7 AO |
3984 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
3985 | { | |
3986 | /* GDesc -> IE transition. | |
3987 | It's originally something like: | |
3988 | leal x@tlsdesc(%ebx), %eax | |
3989 | ||
3990 | Change it to: | |
142411ca | 3991 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
3992 | or: |
3993 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
3994 | ||
3995 | Registers other than %eax may be set up here. */ | |
3996 | ||
67a4f2b7 AO |
3997 | bfd_vma roff; |
3998 | ||
3999 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4000 | offset into any register, although it's probably | |
4001 | almost always going to be eax. */ | |
4002 | roff = rel->r_offset; | |
67a4f2b7 AO |
4003 | |
4004 | /* Now modify the instruction as appropriate. */ | |
4005 | /* To turn a leal into a movl in the form we use it, it | |
4006 | suffices to change the first byte from 0x8d to 0x8b. | |
4007 | aoliva FIXME: should we decide to keep the leal, all | |
4008 | we have to do is remove the statement below, and | |
4009 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4010 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4011 | ||
4012 | if (tls_type == GOT_TLS_IE_BOTH) | |
4013 | off += 4; | |
4014 | ||
4015 | bfd_put_32 (output_bfd, | |
4016 | htab->sgot->output_section->vma | |
4017 | + htab->sgot->output_offset + off | |
4018 | - htab->sgotplt->output_section->vma | |
4019 | - htab->sgotplt->output_offset, | |
4020 | contents + roff); | |
4021 | continue; | |
4022 | } | |
4023 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4024 | { | |
4025 | /* GDesc -> IE transition. | |
4026 | It's originally: | |
4027 | call *(%eax) | |
4028 | ||
4029 | Change it to: | |
142411ca | 4030 | xchg %ax,%ax |
67a4f2b7 AO |
4031 | or |
4032 | negl %eax | |
4033 | depending on how we transformed the TLS_GOTDESC above. | |
4034 | */ | |
4035 | ||
67a4f2b7 AO |
4036 | bfd_vma roff; |
4037 | ||
67a4f2b7 | 4038 | roff = rel->r_offset; |
67a4f2b7 AO |
4039 | |
4040 | /* Now modify the instruction as appropriate. */ | |
4041 | if (tls_type != GOT_TLS_IE_NEG) | |
4042 | { | |
10efb593 L |
4043 | /* xchg %ax,%ax */ |
4044 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
4045 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4046 | } | |
4047 | else | |
4048 | { | |
4049 | /* negl %eax */ | |
4050 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
4051 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
4052 | } | |
4053 | ||
4054 | continue; | |
4055 | } | |
4056 | else | |
4057 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
4058 | break; |
4059 | ||
4060 | case R_386_TLS_LDM: | |
142411ca L |
4061 | if (! elf_i386_tls_transition (info, input_bfd, |
4062 | input_section, contents, | |
4063 | symtab_hdr, sym_hashes, | |
4064 | &r_type, GOT_UNKNOWN, rel, | |
4065 | relend, h)) | |
4066 | return FALSE; | |
13ae64f3 | 4067 | |
142411ca L |
4068 | if (r_type != R_386_TLS_LDM) |
4069 | { | |
13ae64f3 | 4070 | /* LD->LE transition: |
13ae64f3 JJ |
4071 | leal foo(%reg), %eax; call ___tls_get_addr. |
4072 | We change it into: | |
4073 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
142411ca | 4074 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
13ae64f3 JJ |
4075 | memcpy (contents + rel->r_offset - 2, |
4076 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 4077 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
4078 | rel++; |
4079 | continue; | |
4080 | } | |
4081 | ||
4082 | if (htab->sgot == NULL) | |
4083 | abort (); | |
4084 | ||
4085 | off = htab->tls_ldm_got.offset; | |
4086 | if (off & 1) | |
4087 | off &= ~1; | |
4088 | else | |
4089 | { | |
947216bf AM |
4090 | Elf_Internal_Rela outrel; |
4091 | bfd_byte *loc; | |
13ae64f3 JJ |
4092 | |
4093 | if (htab->srelgot == NULL) | |
4094 | abort (); | |
4095 | ||
4096 | outrel.r_offset = (htab->sgot->output_section->vma | |
4097 | + htab->sgot->output_offset + off); | |
4098 | ||
4099 | bfd_put_32 (output_bfd, 0, | |
4100 | htab->sgot->contents + off); | |
4101 | bfd_put_32 (output_bfd, 0, | |
4102 | htab->sgot->contents + off + 4); | |
4103 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); | |
947216bf AM |
4104 | loc = htab->srelgot->contents; |
4105 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
4106 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4107 | htab->tls_ldm_got.offset |= 1; | |
4108 | } | |
8c37241b JJ |
4109 | relocation = htab->sgot->output_section->vma |
4110 | + htab->sgot->output_offset + off | |
4111 | - htab->sgotplt->output_section->vma | |
4112 | - htab->sgotplt->output_offset; | |
b34976b6 | 4113 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
4114 | break; |
4115 | ||
4116 | case R_386_TLS_LDO_32: | |
a45bb67d | 4117 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
eb4ff4d6 | 4118 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
4119 | else |
4120 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 4121 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4122 | break; |
4123 | ||
4124 | case R_386_TLS_LE_32: | |
13ae64f3 | 4125 | case R_386_TLS_LE: |
37e55690 JJ |
4126 | if (info->shared) |
4127 | { | |
947216bf | 4128 | Elf_Internal_Rela outrel; |
37e55690 | 4129 | asection *sreloc; |
947216bf | 4130 | bfd_byte *loc; |
37e55690 JJ |
4131 | int indx; |
4132 | ||
4133 | outrel.r_offset = rel->r_offset | |
4134 | + input_section->output_section->vma | |
4135 | + input_section->output_offset; | |
4136 | if (h != NULL && h->dynindx != -1) | |
4137 | indx = h->dynindx; | |
4138 | else | |
4139 | indx = 0; | |
4140 | if (r_type == R_386_TLS_LE_32) | |
4141 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
4142 | else | |
4143 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
4144 | sreloc = elf_section_data (input_section)->sreloc; | |
4145 | if (sreloc == NULL) | |
4146 | abort (); | |
947216bf AM |
4147 | loc = sreloc->contents; |
4148 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
37e55690 JJ |
4149 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4150 | if (indx) | |
4151 | continue; | |
4152 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4153 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 4154 | else |
eb4ff4d6 | 4155 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
4156 | } |
4157 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4158 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 4159 | else |
eb4ff4d6 | 4160 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4161 | break; |
4162 | ||
252b5132 RH |
4163 | default: |
4164 | break; | |
4165 | } | |
4166 | ||
239e1f3a AM |
4167 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4168 | because such sections are not SEC_ALLOC and thus ld.so will | |
4169 | not process them. */ | |
8c694914 | 4170 | if (unresolved_reloc |
239e1f3a | 4171 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 4172 | && h->def_dynamic)) |
6a30718d JJ |
4173 | { |
4174 | (*_bfd_error_handler) | |
843fe662 | 4175 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
4176 | input_bfd, |
4177 | input_section, | |
6a30718d | 4178 | (long) rel->r_offset, |
843fe662 | 4179 | howto->name, |
6a30718d | 4180 | h->root.root.string); |
b34976b6 | 4181 | return FALSE; |
6a30718d | 4182 | } |
83be169b | 4183 | |
cbe950e9 | 4184 | do_relocation: |
252b5132 RH |
4185 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4186 | contents, rel->r_offset, | |
55fd94b0 | 4187 | relocation, 0); |
252b5132 | 4188 | |
cf5c0c5b | 4189 | if (r != bfd_reloc_ok) |
252b5132 | 4190 | { |
cf5c0c5b | 4191 | const char *name; |
ffb2e45b | 4192 | |
cf5c0c5b AM |
4193 | if (h != NULL) |
4194 | name = h->root.root.string; | |
4195 | else | |
4196 | { | |
4197 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4198 | symtab_hdr->sh_link, | |
4199 | sym->st_name); | |
4200 | if (name == NULL) | |
b34976b6 | 4201 | return FALSE; |
cf5c0c5b AM |
4202 | if (*name == '\0') |
4203 | name = bfd_section_name (input_bfd, sec); | |
4204 | } | |
ffb2e45b | 4205 | |
cf5c0c5b AM |
4206 | if (r == bfd_reloc_overflow) |
4207 | { | |
cf5c0c5b | 4208 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4209 | (info, (h ? &h->root : NULL), name, howto->name, |
4210 | (bfd_vma) 0, input_bfd, input_section, | |
4211 | rel->r_offset))) | |
b34976b6 | 4212 | return FALSE; |
cf5c0c5b AM |
4213 | } |
4214 | else | |
4215 | { | |
4216 | (*_bfd_error_handler) | |
d003868e AM |
4217 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
4218 | input_bfd, input_section, | |
cf5c0c5b | 4219 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4220 | return FALSE; |
cf5c0c5b | 4221 | } |
252b5132 RH |
4222 | } |
4223 | } | |
4224 | ||
b34976b6 | 4225 | return TRUE; |
252b5132 RH |
4226 | } |
4227 | ||
4228 | /* Finish up dynamic symbol handling. We set the contents of various | |
4229 | dynamic sections here. */ | |
4230 | ||
b34976b6 | 4231 | static bfd_boolean |
55fd94b0 AM |
4232 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
4233 | struct bfd_link_info *info, | |
4234 | struct elf_link_hash_entry *h, | |
4235 | Elf_Internal_Sym *sym) | |
252b5132 | 4236 | { |
6725bdbf | 4237 | struct elf_i386_link_hash_table *htab; |
252b5132 | 4238 | |
6725bdbf | 4239 | htab = elf_i386_hash_table (info); |
252b5132 RH |
4240 | |
4241 | if (h->plt.offset != (bfd_vma) -1) | |
4242 | { | |
252b5132 RH |
4243 | bfd_vma plt_index; |
4244 | bfd_vma got_offset; | |
947216bf AM |
4245 | Elf_Internal_Rela rel; |
4246 | bfd_byte *loc; | |
cbe950e9 L |
4247 | asection *plt, *gotplt, *relplt; |
4248 | ||
4249 | /* When building a static executable, use .iplt, .igot.plt and | |
4250 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
710ab287 | 4251 | if (htab->splt != NULL) |
cbe950e9 L |
4252 | { |
4253 | plt = htab->splt; | |
4254 | gotplt = htab->sgotplt; | |
4255 | relplt = htab->srelplt; | |
4256 | } | |
4257 | else | |
4258 | { | |
4259 | plt = htab->iplt; | |
4260 | gotplt = htab->igotplt; | |
4261 | relplt = htab->irelplt; | |
4262 | } | |
252b5132 RH |
4263 | |
4264 | /* This symbol has an entry in the procedure linkage table. Set | |
4265 | it up. */ | |
4266 | ||
cbe950e9 L |
4267 | if ((h->dynindx == -1 |
4268 | && !((h->forced_local || info->executable) | |
4269 | && h->def_regular | |
4270 | && h->type == STT_GNU_IFUNC)) | |
4271 | || plt == NULL | |
4272 | || gotplt == NULL | |
4273 | || relplt == NULL) | |
ffb2e45b | 4274 | abort (); |
252b5132 RH |
4275 | |
4276 | /* Get the index in the procedure linkage table which | |
4277 | corresponds to this symbol. This is the index of this symbol | |
4278 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4279 | first entry in the procedure linkage table is reserved. |
252b5132 | 4280 | |
cbe950e9 | 4281 | Get the offset into the .got table of the entry that |
252b5132 | 4282 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 L |
4283 | The first three are reserved. |
4284 | ||
4285 | For static executables, we don't reserve anything. */ | |
4286 | ||
4287 | if (plt == htab->splt) | |
4288 | { | |
4289 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
4290 | got_offset = (plt_index + 3) * 4; | |
4291 | } | |
4292 | else | |
4293 | { | |
4294 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; | |
4295 | got_offset = plt_index * 4; | |
4296 | } | |
252b5132 RH |
4297 | |
4298 | /* Fill in the entry in the procedure linkage table. */ | |
4299 | if (! info->shared) | |
4300 | { | |
cbe950e9 | 4301 | memcpy (plt->contents + h->plt.offset, elf_i386_plt_entry, |
252b5132 RH |
4302 | PLT_ENTRY_SIZE); |
4303 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4304 | (gotplt->output_section->vma |
4305 | + gotplt->output_offset | |
252b5132 | 4306 | + got_offset), |
cbe950e9 | 4307 | plt->contents + h->plt.offset + 2); |
eac338cf PB |
4308 | |
4309 | if (htab->is_vxworks) | |
4310 | { | |
4311 | int s, k, reloc_index; | |
4312 | ||
4313 | /* Create the R_386_32 relocation referencing the GOT | |
4314 | for this PLT entry. */ | |
4315 | ||
4316 | /* S: Current slot number (zero-based). */ | |
4317 | s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE; | |
4318 | /* K: Number of relocations for PLTResolve. */ | |
4319 | if (info->shared) | |
4320 | k = PLTRESOLVE_RELOCS_SHLIB; | |
4321 | else | |
4322 | k = PLTRESOLVE_RELOCS; | |
4323 | /* Skip the PLTresolve relocations, and the relocations for | |
4324 | the other PLT slots. */ | |
4325 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
4326 | loc = (htab->srelplt2->contents + reloc_index | |
4327 | * sizeof (Elf32_External_Rel)); | |
4328 | ||
4329 | rel.r_offset = (htab->splt->output_section->vma | |
4330 | + htab->splt->output_offset | |
4331 | + h->plt.offset + 2), | |
7325306f | 4332 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4333 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
4334 | ||
4335 | /* Create the R_386_32 relocation referencing the beginning of | |
4336 | the PLT for this GOT entry. */ | |
4337 | rel.r_offset = (htab->sgotplt->output_section->vma | |
4338 | + htab->sgotplt->output_offset | |
4339 | + got_offset); | |
7325306f | 4340 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
4341 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4342 | loc + sizeof (Elf32_External_Rel)); | |
4343 | } | |
252b5132 RH |
4344 | } |
4345 | else | |
4346 | { | |
cbe950e9 | 4347 | memcpy (plt->contents + h->plt.offset, elf_i386_pic_plt_entry, |
252b5132 RH |
4348 | PLT_ENTRY_SIZE); |
4349 | bfd_put_32 (output_bfd, got_offset, | |
cbe950e9 | 4350 | plt->contents + h->plt.offset + 2); |
252b5132 RH |
4351 | } |
4352 | ||
cbe950e9 L |
4353 | /* Don't fill PLT entry for static executables. */ |
4354 | if (plt == htab->splt) | |
4355 | { | |
4356 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
4357 | plt->contents + h->plt.offset + 7); | |
4358 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
4359 | plt->contents + h->plt.offset + 12); | |
4360 | } | |
252b5132 RH |
4361 | |
4362 | /* Fill in the entry in the global offset table. */ | |
4363 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4364 | (plt->output_section->vma |
4365 | + plt->output_offset | |
252b5132 RH |
4366 | + h->plt.offset |
4367 | + 6), | |
cbe950e9 | 4368 | gotplt->contents + got_offset); |
252b5132 RH |
4369 | |
4370 | /* Fill in the entry in the .rel.plt section. */ | |
cbe950e9 L |
4371 | rel.r_offset = (gotplt->output_section->vma |
4372 | + gotplt->output_offset | |
252b5132 | 4373 | + got_offset); |
cbe950e9 L |
4374 | if (h->dynindx == -1 |
4375 | || ((info->executable | |
4376 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4377 | && h->def_regular | |
4378 | && h->type == STT_GNU_IFUNC)) | |
4379 | { | |
4380 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4381 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
4382 | in the .got.plt section. */ | |
4383 | bfd_put_32 (output_bfd, | |
4384 | (h->root.u.def.value | |
4385 | + h->root.u.def.section->output_section->vma | |
4386 | + h->root.u.def.section->output_offset), | |
4387 | gotplt->contents + got_offset); | |
4388 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
4389 | } | |
4390 | else | |
4391 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
4392 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 4393 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 | 4394 | |
f5385ebf | 4395 | if (!h->def_regular) |
252b5132 RH |
4396 | { |
4397 | /* Mark the symbol as undefined, rather than as defined in | |
c6585bbb JJ |
4398 | the .plt section. Leave the value if there were any |
4399 | relocations where pointer equality matters (this is a clue | |
51b64d56 AM |
4400 | for the dynamic linker, to make function pointer |
4401 | comparisons work between an application and shared | |
c6585bbb JJ |
4402 | library), otherwise set it to zero. If a function is only |
4403 | called from a binary, there is no need to slow down | |
4404 | shared libraries because of that. */ | |
252b5132 | 4405 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4406 | if (!h->pointer_equality_needed) |
c6585bbb | 4407 | sym->st_value = 0; |
252b5132 RH |
4408 | } |
4409 | } | |
4410 | ||
13ae64f3 | 4411 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 4412 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
37e55690 | 4413 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0) |
252b5132 | 4414 | { |
947216bf AM |
4415 | Elf_Internal_Rela rel; |
4416 | bfd_byte *loc; | |
252b5132 RH |
4417 | |
4418 | /* This symbol has an entry in the global offset table. Set it | |
4419 | up. */ | |
4420 | ||
ffb2e45b AM |
4421 | if (htab->sgot == NULL || htab->srelgot == NULL) |
4422 | abort (); | |
252b5132 | 4423 | |
6725bdbf AM |
4424 | rel.r_offset = (htab->sgot->output_section->vma |
4425 | + htab->sgot->output_offset | |
dc810e39 | 4426 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 4427 | |
dd5724d5 AM |
4428 | /* If this is a static link, or it is a -Bsymbolic link and the |
4429 | symbol is defined locally or was forced to be local because | |
4430 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
4431 | The entry in the global offset table will already have been |
4432 | initialized in the relocate_section function. */ | |
710ab287 | 4433 | if (h->def_regular |
0018b0a3 L |
4434 | && h->type == STT_GNU_IFUNC) |
4435 | { | |
710ab287 L |
4436 | if (info->shared) |
4437 | { | |
4438 | /* Generate R_386_GLOB_DAT. */ | |
4439 | goto do_glob_dat; | |
4440 | } | |
4441 | else | |
4442 | { | |
4443 | if (!h->pointer_equality_needed) | |
4444 | abort (); | |
4445 | ||
4446 | /* For non-shared object, we can't use .got.plt, which | |
4447 | contains the real function addres if we need pointer | |
4448 | equality. We load the GOT entry with the PLT entry. */ | |
4449 | asection *plt = htab->splt ? htab->splt : htab->iplt; | |
4450 | bfd_put_32 (output_bfd, | |
4451 | (plt->output_section->vma | |
4452 | + plt->output_offset + h->plt.offset), | |
4453 | htab->sgot->contents + h->got.offset); | |
4454 | return TRUE; | |
4455 | } | |
0018b0a3 L |
4456 | } |
4457 | else if (info->shared | |
4458 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
dd5724d5 | 4459 | { |
6725bdbf | 4460 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
4461 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
4462 | } | |
252b5132 RH |
4463 | else |
4464 | { | |
dd5724d5 | 4465 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 4466 | do_glob_dat: |
6725bdbf AM |
4467 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
4468 | htab->sgot->contents + h->got.offset); | |
252b5132 RH |
4469 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
4470 | } | |
4471 | ||
947216bf AM |
4472 | loc = htab->srelgot->contents; |
4473 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 4474 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 RH |
4475 | } |
4476 | ||
f5385ebf | 4477 | if (h->needs_copy) |
252b5132 | 4478 | { |
947216bf AM |
4479 | Elf_Internal_Rela rel; |
4480 | bfd_byte *loc; | |
252b5132 RH |
4481 | |
4482 | /* This symbol needs a copy reloc. Set it up. */ | |
4483 | ||
ffb2e45b AM |
4484 | if (h->dynindx == -1 |
4485 | || (h->root.type != bfd_link_hash_defined | |
4486 | && h->root.type != bfd_link_hash_defweak) | |
4487 | || htab->srelbss == NULL) | |
4488 | abort (); | |
252b5132 RH |
4489 | |
4490 | rel.r_offset = (h->root.u.def.value | |
4491 | + h->root.u.def.section->output_section->vma | |
4492 | + h->root.u.def.section->output_offset); | |
4493 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
947216bf AM |
4494 | loc = htab->srelbss->contents; |
4495 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 4496 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 RH |
4497 | } |
4498 | ||
c25bc9fc L |
4499 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
4500 | be NULL for local symbols. | |
4501 | ||
eac338cf PB |
4502 | On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it |
4503 | is relative to the ".got" section. */ | |
c25bc9fc L |
4504 | if (sym != NULL |
4505 | && (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
4506 | || (!htab->is_vxworks && h == htab->elf.hgot))) | |
252b5132 RH |
4507 | sym->st_shndx = SHN_ABS; |
4508 | ||
b34976b6 | 4509 | return TRUE; |
252b5132 RH |
4510 | } |
4511 | ||
c25bc9fc L |
4512 | /* Finish up local dynamic symbol handling. We set the contents of |
4513 | various dynamic sections here. */ | |
4514 | ||
4515 | static bfd_boolean | |
4516 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
4517 | { | |
4518 | struct elf_link_hash_entry *h | |
4519 | = (struct elf_link_hash_entry *) *slot; | |
4520 | struct bfd_link_info *info | |
4521 | = (struct bfd_link_info *) inf; | |
4522 | ||
4523 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
4524 | h, NULL); | |
4525 | } | |
4526 | ||
38701953 AM |
4527 | /* Used to decide how to sort relocs in an optimal manner for the |
4528 | dynamic linker, before writing them out. */ | |
4529 | ||
4530 | static enum elf_reloc_type_class | |
55fd94b0 | 4531 | elf_i386_reloc_type_class (const Elf_Internal_Rela *rela) |
38701953 | 4532 | { |
55fd94b0 | 4533 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 AM |
4534 | { |
4535 | case R_386_RELATIVE: | |
4536 | return reloc_class_relative; | |
4537 | case R_386_JUMP_SLOT: | |
4538 | return reloc_class_plt; | |
4539 | case R_386_COPY: | |
4540 | return reloc_class_copy; | |
4541 | default: | |
4542 | return reloc_class_normal; | |
4543 | } | |
4544 | } | |
4545 | ||
252b5132 RH |
4546 | /* Finish up the dynamic sections. */ |
4547 | ||
b34976b6 | 4548 | static bfd_boolean |
55fd94b0 AM |
4549 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
4550 | struct bfd_link_info *info) | |
252b5132 | 4551 | { |
6725bdbf | 4552 | struct elf_i386_link_hash_table *htab; |
252b5132 | 4553 | bfd *dynobj; |
252b5132 RH |
4554 | asection *sdyn; |
4555 | ||
6725bdbf | 4556 | htab = elf_i386_hash_table (info); |
ebe50bae | 4557 | dynobj = htab->elf.dynobj; |
252b5132 RH |
4558 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
4559 | ||
ebe50bae | 4560 | if (htab->elf.dynamic_sections_created) |
252b5132 | 4561 | { |
252b5132 RH |
4562 | Elf32_External_Dyn *dyncon, *dynconend; |
4563 | ||
ffb2e45b AM |
4564 | if (sdyn == NULL || htab->sgot == NULL) |
4565 | abort (); | |
252b5132 RH |
4566 | |
4567 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 4568 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
4569 | for (; dyncon < dynconend; dyncon++) |
4570 | { | |
4571 | Elf_Internal_Dyn dyn; | |
51b64d56 | 4572 | asection *s; |
252b5132 RH |
4573 | |
4574 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4575 | ||
4576 | switch (dyn.d_tag) | |
4577 | { | |
4578 | default: | |
7a2b07ff NS |
4579 | if (htab->is_vxworks |
4580 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
4581 | break; | |
0ac8d2ca | 4582 | continue; |
252b5132 RH |
4583 | |
4584 | case DT_PLTGOT: | |
8c37241b JJ |
4585 | s = htab->sgotplt; |
4586 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
6725bdbf AM |
4587 | break; |
4588 | ||
252b5132 | 4589 | case DT_JMPREL: |
6348e046 AM |
4590 | s = htab->srelplt; |
4591 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
252b5132 RH |
4592 | break; |
4593 | ||
4594 | case DT_PLTRELSZ: | |
6348e046 | 4595 | s = htab->srelplt; |
eea6121a | 4596 | dyn.d_un.d_val = s->size; |
252b5132 RH |
4597 | break; |
4598 | ||
4599 | case DT_RELSZ: | |
4600 | /* My reading of the SVR4 ABI indicates that the | |
4601 | procedure linkage table relocs (DT_JMPREL) should be | |
4602 | included in the overall relocs (DT_REL). This is | |
4603 | what Solaris does. However, UnixWare can not handle | |
4604 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 AM |
4605 | here to make it not include the JMPREL relocs. */ |
4606 | s = htab->srelplt; | |
4607 | if (s == NULL) | |
4608 | continue; | |
eea6121a | 4609 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
4610 | break; |
4611 | ||
4612 | case DT_REL: | |
4613 | /* We may not be using the standard ELF linker script. | |
4614 | If .rel.plt is the first .rel section, we adjust | |
4615 | DT_REL to not include it. */ | |
4616 | s = htab->srelplt; | |
4617 | if (s == NULL) | |
4618 | continue; | |
4619 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
4620 | continue; | |
eea6121a | 4621 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
4622 | break; |
4623 | } | |
0ac8d2ca AM |
4624 | |
4625 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
4626 | } |
4627 | ||
4628 | /* Fill in the first entry in the procedure linkage table. */ | |
eea6121a | 4629 | if (htab->splt && htab->splt->size > 0) |
252b5132 RH |
4630 | { |
4631 | if (info->shared) | |
eac338cf PB |
4632 | { |
4633 | memcpy (htab->splt->contents, elf_i386_pic_plt0_entry, | |
4634 | sizeof (elf_i386_pic_plt0_entry)); | |
4635 | memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry), | |
4636 | htab->plt0_pad_byte, | |
4637 | PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry)); | |
4638 | } | |
252b5132 RH |
4639 | else |
4640 | { | |
eac338cf PB |
4641 | memcpy (htab->splt->contents, elf_i386_plt0_entry, |
4642 | sizeof(elf_i386_plt0_entry)); | |
4643 | memset (htab->splt->contents + sizeof (elf_i386_plt0_entry), | |
4644 | htab->plt0_pad_byte, | |
4645 | PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry)); | |
252b5132 | 4646 | bfd_put_32 (output_bfd, |
6725bdbf AM |
4647 | (htab->sgotplt->output_section->vma |
4648 | + htab->sgotplt->output_offset | |
4649 | + 4), | |
4650 | htab->splt->contents + 2); | |
252b5132 | 4651 | bfd_put_32 (output_bfd, |
6725bdbf AM |
4652 | (htab->sgotplt->output_section->vma |
4653 | + htab->sgotplt->output_offset | |
4654 | + 8), | |
4655 | htab->splt->contents + 8); | |
eac338cf PB |
4656 | |
4657 | if (htab->is_vxworks) | |
4658 | { | |
4659 | Elf_Internal_Rela rel; | |
7325306f | 4660 | |
eac338cf PB |
4661 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
4662 | On IA32 we use REL relocations so the addend goes in | |
4663 | the PLT directly. */ | |
4664 | rel.r_offset = (htab->splt->output_section->vma | |
4665 | + htab->splt->output_offset | |
4666 | + 2); | |
7325306f | 4667 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4668 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4669 | htab->srelplt2->contents); | |
4670 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
4671 | rel.r_offset = (htab->splt->output_section->vma | |
4672 | + htab->splt->output_offset | |
4673 | + 8); | |
7325306f | 4674 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4675 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4676 | htab->srelplt2->contents + | |
4677 | sizeof (Elf32_External_Rel)); | |
4678 | } | |
252b5132 RH |
4679 | } |
4680 | ||
4681 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
4682 | really seem like the right value. */ | |
6725bdbf AM |
4683 | elf_section_data (htab->splt->output_section) |
4684 | ->this_hdr.sh_entsize = 4; | |
eac338cf PB |
4685 | |
4686 | /* Correct the .rel.plt.unloaded relocations. */ | |
4687 | if (htab->is_vxworks && !info->shared) | |
4688 | { | |
4689 | int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1; | |
4c9b0de6 | 4690 | unsigned char *p; |
eac338cf PB |
4691 | |
4692 | p = htab->srelplt2->contents; | |
4693 | if (info->shared) | |
4694 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
4695 | else | |
4696 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
4697 | ||
4698 | for (; num_plts; num_plts--) | |
4699 | { | |
4700 | Elf_Internal_Rela rel; | |
4701 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 4702 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4703 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4704 | p += sizeof (Elf32_External_Rel); | |
4705 | ||
4706 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 4707 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
4708 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4709 | p += sizeof (Elf32_External_Rel); | |
4710 | } | |
4711 | } | |
252b5132 RH |
4712 | } |
4713 | } | |
4714 | ||
12d0ee4a | 4715 | if (htab->sgotplt) |
252b5132 | 4716 | { |
12d0ee4a | 4717 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 4718 | if (htab->sgotplt->size > 0) |
12d0ee4a AM |
4719 | { |
4720 | bfd_put_32 (output_bfd, | |
55fd94b0 | 4721 | (sdyn == NULL ? 0 |
12d0ee4a AM |
4722 | : sdyn->output_section->vma + sdyn->output_offset), |
4723 | htab->sgotplt->contents); | |
55fd94b0 AM |
4724 | bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4); |
4725 | bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8); | |
12d0ee4a | 4726 | } |
252b5132 | 4727 | |
12d0ee4a AM |
4728 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4; |
4729 | } | |
8c37241b | 4730 | |
eea6121a | 4731 | if (htab->sgot && htab->sgot->size > 0) |
8c37241b JJ |
4732 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4; |
4733 | ||
c25bc9fc L |
4734 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4735 | htab_traverse (htab->loc_hash_table, | |
4736 | elf_i386_finish_local_dynamic_symbol, | |
4737 | info); | |
4738 | ||
b34976b6 | 4739 | return TRUE; |
252b5132 RH |
4740 | } |
4741 | ||
4c45e5c9 JJ |
4742 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4743 | or (bfd_vma) -1 if it should not be included. */ | |
4744 | ||
4745 | static bfd_vma | |
4746 | elf_i386_plt_sym_val (bfd_vma i, const asection *plt, | |
4747 | const arelent *rel ATTRIBUTE_UNUSED) | |
4748 | { | |
4749 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
4750 | } | |
4751 | ||
fdc90cb4 JJ |
4752 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
4753 | ||
4754 | static bfd_boolean | |
4755 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
4756 | { | |
4757 | if (h->plt.offset != (bfd_vma) -1 | |
4758 | && !h->def_regular | |
4759 | && !h->pointer_equality_needed) | |
4760 | return FALSE; | |
4761 | ||
4762 | return _bfd_elf_hash_symbol (h); | |
4763 | } | |
4c45e5c9 | 4764 | |
d8045f23 NC |
4765 | /* Hook called by the linker routine which adds symbols from an object |
4766 | file. */ | |
4767 | ||
4768 | static bfd_boolean | |
4769 | elf_i386_add_symbol_hook (bfd * abfd ATTRIBUTE_UNUSED, | |
4770 | struct bfd_link_info * info ATTRIBUTE_UNUSED, | |
4771 | Elf_Internal_Sym * sym, | |
4772 | const char ** namep ATTRIBUTE_UNUSED, | |
4773 | flagword * flagsp ATTRIBUTE_UNUSED, | |
4774 | asection ** secp ATTRIBUTE_UNUSED, | |
4775 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
4776 | { | |
4777 | if (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
4778 | elf_tdata (info->output_bfd)->has_ifunc_symbols = TRUE; | |
4779 | ||
4780 | return TRUE; | |
4781 | } | |
4782 | ||
252b5132 RH |
4783 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec |
4784 | #define TARGET_LITTLE_NAME "elf32-i386" | |
4785 | #define ELF_ARCH bfd_arch_i386 | |
4786 | #define ELF_MACHINE_CODE EM_386 | |
4787 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
4788 | |
4789 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4790 | #define elf_backend_can_refcount 1 |
252b5132 RH |
4791 | #define elf_backend_want_got_plt 1 |
4792 | #define elf_backend_plt_readonly 1 | |
4793 | #define elf_backend_want_plt_sym 0 | |
4794 | #define elf_backend_got_header_size 12 | |
252b5132 | 4795 | |
8c29f035 AM |
4796 | /* Support RELA for objdump of prelink objects. */ |
4797 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
4798 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
4799 | ||
13ae64f3 | 4800 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 4801 | |
dd5724d5 AM |
4802 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
4803 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
c25bc9fc | 4804 | #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free |
dd5724d5 | 4805 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 4806 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
dd5724d5 AM |
4807 | |
4808 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 4809 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 4810 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 4811 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 4812 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 4813 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
4814 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
4815 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
4816 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
4817 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
4818 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
4819 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 4820 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
4821 | #define elf_backend_relocate_section elf_i386_relocate_section |
4822 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 4823 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
4824 | #define elf_backend_omit_section_dynsym \ |
4825 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
4c45e5c9 | 4826 | #define elf_backend_plt_sym_val elf_i386_plt_sym_val |
fdc90cb4 | 4827 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
d8045f23 NC |
4828 | #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook |
4829 | #undef elf_backend_post_process_headers | |
4830 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
dd5724d5 | 4831 | |
252b5132 | 4832 | #include "elf32-target.h" |
2bc3c89a AM |
4833 | |
4834 | /* FreeBSD support. */ | |
4835 | ||
4836 | #undef TARGET_LITTLE_SYM | |
4837 | #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec | |
4838 | #undef TARGET_LITTLE_NAME | |
4839 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
4840 | #undef ELF_OSABI |
4841 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
4842 | |
4843 | /* The kernel recognizes executables as valid only if they carry a | |
4844 | "FreeBSD" label in the ELF header. So we put this label on all | |
4845 | executables and (for simplicity) also all other object files. */ | |
4846 | ||
2bc3c89a | 4847 | static void |
d8045f23 | 4848 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 4849 | { |
d8045f23 | 4850 | _bfd_elf_set_osabi (abfd, info); |
2bc3c89a | 4851 | |
2bc3c89a AM |
4852 | #ifdef OLD_FREEBSD_ABI_LABEL |
4853 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
4854 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
caf47ea6 | 4855 | #endif |
2bc3c89a AM |
4856 | } |
4857 | ||
4858 | #undef elf_backend_post_process_headers | |
d8045f23 | 4859 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
4860 | #undef elf32_bed |
4861 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 4862 | |
d8045f23 NC |
4863 | #undef elf_backend_add_symbol_hook |
4864 | ||
2bc3c89a | 4865 | #include "elf32-target.h" |
eac338cf PB |
4866 | |
4867 | /* VxWorks support. */ | |
4868 | ||
4869 | #undef TARGET_LITTLE_SYM | |
4870 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec | |
4871 | #undef TARGET_LITTLE_NAME | |
4872 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 4873 | #undef ELF_OSABI |
eac338cf PB |
4874 | |
4875 | /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */ | |
4876 | ||
4877 | static struct bfd_link_hash_table * | |
4878 | elf_i386_vxworks_link_hash_table_create (bfd *abfd) | |
4879 | { | |
4880 | struct bfd_link_hash_table *ret; | |
4881 | struct elf_i386_link_hash_table *htab; | |
4882 | ||
4883 | ret = elf_i386_link_hash_table_create (abfd); | |
4884 | if (ret) | |
4885 | { | |
4886 | htab = (struct elf_i386_link_hash_table *) ret; | |
4887 | htab->is_vxworks = 1; | |
4888 | htab->plt0_pad_byte = 0x90; | |
4889 | } | |
4890 | ||
4891 | return ret; | |
4892 | } | |
4893 | ||
4894 | ||
13285a1b AM |
4895 | #undef elf_backend_relocs_compatible |
4896 | #undef elf_backend_post_process_headers | |
eac338cf PB |
4897 | #undef bfd_elf32_bfd_link_hash_table_create |
4898 | #define bfd_elf32_bfd_link_hash_table_create \ | |
4899 | elf_i386_vxworks_link_hash_table_create | |
4900 | #undef elf_backend_add_symbol_hook | |
4901 | #define elf_backend_add_symbol_hook \ | |
4902 | elf_vxworks_add_symbol_hook | |
4903 | #undef elf_backend_link_output_symbol_hook | |
4904 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 4905 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
4906 | #undef elf_backend_emit_relocs |
4907 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
4908 | #undef elf_backend_final_write_processing | |
4909 | #define elf_backend_final_write_processing \ | |
4910 | elf_vxworks_final_write_processing | |
4911 | ||
4912 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
4913 | define it. */ | |
4914 | #undef elf_backend_want_plt_sym | |
4915 | #define elf_backend_want_plt_sym 1 | |
4916 | ||
4917 | #undef elf32_bed | |
4918 | #define elf32_bed elf32_i386_vxworks_bed | |
4919 | ||
4920 | #include "elf32-target.h" |