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, |
67a4f2b7 | 3 | 2003, 2004, 2005, 2006 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 | |
9 | the Free Software Foundation; either version 2 of the License, or | |
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 | |
3e110533 | 19 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, MA 02110-1301, USA. */ |
252b5132 RH |
20 | |
21 | #include "bfd.h" | |
22 | #include "sysdep.h" | |
23 | #include "bfdlink.h" | |
24 | #include "libbfd.h" | |
25 | #include "elf-bfd.h" | |
eac338cf | 26 | #include "elf-vxworks.h" |
252b5132 | 27 | |
55fd94b0 AM |
28 | /* 386 uses REL relocations instead of RELA. */ |
29 | #define USE_REL 1 | |
252b5132 RH |
30 | |
31 | #include "elf/i386.h" | |
32 | ||
33 | static reloc_howto_type elf_howto_table[]= | |
34 | { | |
b34976b6 | 35 | HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield, |
1b452ec6 | 36 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
37 | TRUE, 0x00000000, 0x00000000, FALSE), |
38 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 39 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
40 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
41 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 42 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
43 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
44 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 45 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
46 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
47 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 48 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
49 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
50 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 51 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
52 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
53 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 54 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
55 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
56 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 57 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
58 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
59 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 60 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
61 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
62 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 63 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
64 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
65 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 66 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 67 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 68 | |
dc47f327 AM |
69 | /* We have a gap in the reloc numbers here. |
70 | R_386_standard counts the number up to this point, and | |
71 | R_386_ext_offset is the value to subtract from a reloc type of | |
72 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
73 | #define R_386_standard (R_386_GOTPC + 1) |
74 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 75 | |
37e55690 | 76 | /* These relocs are a GNU extension. */ |
b34976b6 | 77 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 78 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
79 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
80 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 81 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
82 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
83 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 84 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
85 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
86 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 87 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
88 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
89 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 90 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
91 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
92 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 93 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
94 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
95 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 96 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 97 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 98 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 99 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
100 | TRUE, 0xffff, 0xffff, TRUE), |
101 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 102 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
103 | TRUE, 0xff, 0xff, FALSE), |
104 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 105 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 106 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 107 | |
55fd94b0 AM |
108 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
109 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 110 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 111 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 112 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
113 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
114 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 115 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
116 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
117 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 118 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
119 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
120 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 121 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
122 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
123 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 124 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
125 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
126 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 127 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 128 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
67a4f2b7 AO |
129 | EMPTY_HOWTO (38), |
130 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
131 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
132 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
133 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
134 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
135 | FALSE, 0, 0, FALSE), | |
136 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
137 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
138 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
139 | |
140 | /* Another gap. */ | |
67a4f2b7 | 141 | #define R_386_tls (R_386_TLS_DESC + 1 - R_386_tls_offset) |
55fd94b0 | 142 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_tls) |
252b5132 RH |
143 | |
144 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
145 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
146 | 0, /* rightshift */ | |
147 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
148 | 0, /* bitsize */ | |
b34976b6 | 149 | FALSE, /* pc_relative */ |
252b5132 RH |
150 | 0, /* bitpos */ |
151 | complain_overflow_dont, /* complain_on_overflow */ | |
152 | NULL, /* special_function */ | |
153 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 154 | FALSE, /* partial_inplace */ |
252b5132 RH |
155 | 0, /* src_mask */ |
156 | 0, /* dst_mask */ | |
b34976b6 | 157 | FALSE), /* pcrel_offset */ |
252b5132 RH |
158 | |
159 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
160 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
161 | 0, /* rightshift */ | |
162 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
163 | 0, /* bitsize */ | |
b34976b6 | 164 | FALSE, /* pc_relative */ |
252b5132 RH |
165 | 0, /* bitpos */ |
166 | complain_overflow_dont, /* complain_on_overflow */ | |
167 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
168 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 169 | FALSE, /* partial_inplace */ |
252b5132 RH |
170 | 0, /* src_mask */ |
171 | 0, /* dst_mask */ | |
b34976b6 | 172 | FALSE) /* pcrel_offset */ |
dc47f327 | 173 | |
55fd94b0 | 174 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
175 | |
176 | }; | |
177 | ||
252b5132 | 178 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
179 | #define TRACE(str) \ |
180 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
181 | #else |
182 | #define TRACE(str) | |
183 | #endif | |
184 | ||
185 | static reloc_howto_type * | |
55fd94b0 AM |
186 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
187 | bfd_reloc_code_real_type code) | |
252b5132 RH |
188 | { |
189 | switch (code) | |
190 | { | |
191 | case BFD_RELOC_NONE: | |
192 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 193 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
194 | |
195 | case BFD_RELOC_32: | |
196 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 197 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
198 | |
199 | case BFD_RELOC_CTOR: | |
200 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 201 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
202 | |
203 | case BFD_RELOC_32_PCREL: | |
204 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 205 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
206 | |
207 | case BFD_RELOC_386_GOT32: | |
208 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 209 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
210 | |
211 | case BFD_RELOC_386_PLT32: | |
212 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 213 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
214 | |
215 | case BFD_RELOC_386_COPY: | |
216 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 217 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
218 | |
219 | case BFD_RELOC_386_GLOB_DAT: | |
220 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 221 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
222 | |
223 | case BFD_RELOC_386_JUMP_SLOT: | |
224 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 225 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
226 | |
227 | case BFD_RELOC_386_RELATIVE: | |
228 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 229 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
230 | |
231 | case BFD_RELOC_386_GOTOFF: | |
232 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 233 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
234 | |
235 | case BFD_RELOC_386_GOTPC: | |
236 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 237 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 238 | |
37e55690 JJ |
239 | /* These relocs are a GNU extension. */ |
240 | case BFD_RELOC_386_TLS_TPOFF: | |
241 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 242 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
243 | |
244 | case BFD_RELOC_386_TLS_IE: | |
245 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 246 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
247 | |
248 | case BFD_RELOC_386_TLS_GOTIE: | |
249 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 250 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 251 | |
13ae64f3 JJ |
252 | case BFD_RELOC_386_TLS_LE: |
253 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 254 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
255 | |
256 | case BFD_RELOC_386_TLS_GD: | |
257 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 258 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
259 | |
260 | case BFD_RELOC_386_TLS_LDM: | |
261 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 262 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 263 | |
252b5132 RH |
264 | case BFD_RELOC_16: |
265 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 266 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
267 | |
268 | case BFD_RELOC_16_PCREL: | |
269 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 270 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
271 | |
272 | case BFD_RELOC_8: | |
273 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 274 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
275 | |
276 | case BFD_RELOC_8_PCREL: | |
277 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 278 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 279 | |
13ae64f3 JJ |
280 | /* Common with Sun TLS implementation. */ |
281 | case BFD_RELOC_386_TLS_LDO_32: | |
282 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 283 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
284 | |
285 | case BFD_RELOC_386_TLS_IE_32: | |
286 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 287 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
288 | |
289 | case BFD_RELOC_386_TLS_LE_32: | |
290 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 291 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
292 | |
293 | case BFD_RELOC_386_TLS_DTPMOD32: | |
294 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 295 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
296 | |
297 | case BFD_RELOC_386_TLS_DTPOFF32: | |
298 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 299 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
300 | |
301 | case BFD_RELOC_386_TLS_TPOFF32: | |
302 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 303 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 304 | |
67a4f2b7 AO |
305 | case BFD_RELOC_386_TLS_GOTDESC: |
306 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
307 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
308 | ||
309 | case BFD_RELOC_386_TLS_DESC_CALL: | |
310 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
311 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
312 | ||
313 | case BFD_RELOC_386_TLS_DESC: | |
314 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
315 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
316 | ||
252b5132 RH |
317 | case BFD_RELOC_VTABLE_INHERIT: |
318 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 319 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
320 | |
321 | case BFD_RELOC_VTABLE_ENTRY: | |
322 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 323 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
324 | |
325 | default: | |
326 | break; | |
327 | } | |
328 | ||
329 | TRACE ("Unknown"); | |
330 | return 0; | |
331 | } | |
332 | ||
252b5132 | 333 | static void |
55fd94b0 AM |
334 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, |
335 | arelent *cache_ptr, | |
336 | Elf_Internal_Rela *dst) | |
252b5132 | 337 | { |
dc47f327 AM |
338 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); |
339 | unsigned int indx; | |
340 | ||
341 | if ((indx = r_type) >= R_386_standard | |
342 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
343 | >= R_386_ext - R_386_standard) | |
13ae64f3 JJ |
344 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
345 | >= R_386_tls - R_386_ext) | |
346 | && ((indx = r_type - R_386_vt_offset) - R_386_tls | |
347 | >= R_386_vt - R_386_tls)) | |
252b5132 | 348 | { |
d003868e AM |
349 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
350 | abfd, (int) r_type); | |
55fd94b0 | 351 | indx = R_386_NONE; |
252b5132 | 352 | } |
dc47f327 | 353 | cache_ptr->howto = &elf_howto_table[indx]; |
252b5132 RH |
354 | } |
355 | ||
356 | /* Return whether a symbol name implies a local label. The UnixWare | |
357 | 2.1 cc generates temporary symbols that start with .X, so we | |
358 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
359 | If so, we should move the .X recognition into | |
360 | _bfd_elf_is_local_label_name. */ | |
361 | ||
b34976b6 | 362 | static bfd_boolean |
55fd94b0 | 363 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
364 | { |
365 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 366 | return TRUE; |
252b5132 RH |
367 | |
368 | return _bfd_elf_is_local_label_name (abfd, name); | |
369 | } | |
370 | \f | |
38701953 | 371 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 372 | |
b34976b6 | 373 | static bfd_boolean |
55fd94b0 | 374 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
375 | { |
376 | int offset; | |
eea6121a | 377 | size_t size; |
38701953 | 378 | |
61adc1a4 | 379 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 380 | { |
61adc1a4 NC |
381 | int pr_version = bfd_get_32 (abfd, note->descdata); |
382 | ||
383 | if (pr_version != 1) | |
384 | return FALSE; | |
385 | ||
386 | /* pr_cursig */ | |
387 | elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20); | |
388 | ||
389 | /* pr_pid */ | |
390 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
391 | ||
392 | /* pr_reg */ | |
393 | offset = 28; | |
eea6121a | 394 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
395 | } |
396 | else | |
397 | { | |
398 | switch (note->descsz) | |
399 | { | |
400 | default: | |
401 | return FALSE; | |
38701953 | 402 | |
61adc1a4 NC |
403 | case 144: /* Linux/i386 */ |
404 | /* pr_cursig */ | |
405 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
38701953 | 406 | |
61adc1a4 NC |
407 | /* pr_pid */ |
408 | elf_tdata (abfd)->core_pid = bfd_get_32 (abfd, note->descdata + 24); | |
38701953 | 409 | |
61adc1a4 NC |
410 | /* pr_reg */ |
411 | offset = 72; | |
eea6121a | 412 | size = 68; |
38701953 | 413 | |
61adc1a4 NC |
414 | break; |
415 | } | |
38701953 AM |
416 | } |
417 | ||
418 | /* Make a ".reg/999" section. */ | |
419 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 420 | size, note->descpos + offset); |
38701953 AM |
421 | } |
422 | ||
b34976b6 | 423 | static bfd_boolean |
55fd94b0 | 424 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 425 | { |
61adc1a4 | 426 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 427 | { |
61adc1a4 NC |
428 | int pr_version = bfd_get_32 (abfd, note->descdata); |
429 | ||
430 | if (pr_version != 1) | |
b34976b6 | 431 | return FALSE; |
38701953 | 432 | |
61adc1a4 NC |
433 | elf_tdata (abfd)->core_program |
434 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); | |
435 | elf_tdata (abfd)->core_command | |
436 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); | |
437 | } | |
438 | else | |
439 | { | |
440 | switch (note->descsz) | |
441 | { | |
442 | default: | |
443 | return FALSE; | |
444 | ||
445 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
446 | elf_tdata (abfd)->core_program | |
447 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
448 | elf_tdata (abfd)->core_command | |
449 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
450 | } | |
38701953 AM |
451 | } |
452 | ||
453 | /* Note that for some reason, a spurious space is tacked | |
454 | onto the end of the args in some (at least one anyway) | |
455 | implementations, so strip it off if it exists. */ | |
38701953 AM |
456 | { |
457 | char *command = elf_tdata (abfd)->core_command; | |
458 | int n = strlen (command); | |
459 | ||
460 | if (0 < n && command[n - 1] == ' ') | |
461 | command[n - 1] = '\0'; | |
462 | } | |
463 | ||
b34976b6 | 464 | return TRUE; |
38701953 AM |
465 | } |
466 | \f | |
467 | /* Functions for the i386 ELF linker. | |
468 | ||
469 | In order to gain some understanding of code in this file without | |
470 | knowing all the intricate details of the linker, note the | |
471 | following: | |
472 | ||
473 | Functions named elf_i386_* are called by external routines, other | |
474 | functions are only called locally. elf_i386_* functions appear | |
475 | in this file more or less in the order in which they are called | |
476 | from external routines. eg. elf_i386_check_relocs is called | |
477 | early in the link process, elf_i386_finish_dynamic_sections is | |
478 | one of the last functions. */ | |
479 | ||
252b5132 RH |
480 | |
481 | /* The name of the dynamic interpreter. This is put in the .interp | |
482 | section. */ | |
483 | ||
484 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
485 | ||
a23b6845 AM |
486 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
487 | copying dynamic variables from a shared lib into an app's dynbss | |
488 | section, and instead use a dynamic relocation to point into the | |
489 | shared lib. */ | |
490 | #define ELIMINATE_COPY_RELOCS 1 | |
491 | ||
252b5132 RH |
492 | /* The size in bytes of an entry in the procedure linkage table. */ |
493 | ||
494 | #define PLT_ENTRY_SIZE 16 | |
495 | ||
496 | /* The first entry in an absolute procedure linkage table looks like | |
eac338cf PB |
497 | this. See the SVR4 ABI i386 supplement to see how this works. |
498 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 499 | |
eac338cf | 500 | static const bfd_byte elf_i386_plt0_entry[12] = |
252b5132 RH |
501 | { |
502 | 0xff, 0x35, /* pushl contents of address */ | |
503 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
504 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 505 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
506 | }; |
507 | ||
508 | /* Subsequent entries in an absolute procedure linkage table look like | |
509 | this. */ | |
510 | ||
511 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
512 | { | |
513 | 0xff, 0x25, /* jmp indirect */ | |
514 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
515 | 0x68, /* pushl immediate */ | |
516 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
517 | 0xe9, /* jmp relative */ | |
518 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
519 | }; | |
520 | ||
eac338cf PB |
521 | /* The first entry in a PIC procedure linkage table look like this. |
522 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 523 | |
eac338cf | 524 | static const bfd_byte elf_i386_pic_plt0_entry[12] = |
252b5132 RH |
525 | { |
526 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 527 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
528 | }; |
529 | ||
530 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
531 | ||
532 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
533 | { | |
534 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
535 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
536 | 0x68, /* pushl immediate */ | |
537 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
538 | 0xe9, /* jmp relative */ | |
539 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
540 | }; | |
541 | ||
eac338cf PB |
542 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
543 | for the PLTResolve stub and then for each PLT entry. */ | |
544 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
545 | #define PLTRESOLVE_RELOCS 2 | |
546 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
547 | ||
252b5132 | 548 | /* The i386 linker needs to keep track of the number of relocs that it |
ffb2e45b AM |
549 | decides to copy as dynamic relocs in check_relocs for each symbol. |
550 | This is so that it can later discard them if they are found to be | |
551 | unnecessary. We store the information in a field extending the | |
552 | regular ELF linker hash table. */ | |
252b5132 | 553 | |
ffb2e45b | 554 | struct elf_i386_dyn_relocs |
252b5132 | 555 | { |
ffb2e45b | 556 | struct elf_i386_dyn_relocs *next; |
0c715baa AM |
557 | |
558 | /* The input section of the reloc. */ | |
559 | asection *sec; | |
560 | ||
561 | /* Total number of relocs copied for the input section. */ | |
252b5132 | 562 | bfd_size_type count; |
0c715baa AM |
563 | |
564 | /* Number of pc-relative relocs copied for the input section. */ | |
565 | bfd_size_type pc_count; | |
252b5132 RH |
566 | }; |
567 | ||
568 | /* i386 ELF linker hash entry. */ | |
569 | ||
570 | struct elf_i386_link_hash_entry | |
571 | { | |
ebe50bae | 572 | struct elf_link_hash_entry elf; |
252b5132 | 573 | |
0c715baa | 574 | /* Track dynamic relocs copied for this symbol. */ |
ffb2e45b | 575 | struct elf_i386_dyn_relocs *dyn_relocs; |
13ae64f3 | 576 | |
37e55690 JJ |
577 | #define GOT_UNKNOWN 0 |
578 | #define GOT_NORMAL 1 | |
579 | #define GOT_TLS_GD 2 | |
580 | #define GOT_TLS_IE 4 | |
581 | #define GOT_TLS_IE_POS 5 | |
582 | #define GOT_TLS_IE_NEG 6 | |
583 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
584 | #define GOT_TLS_GDESC 8 |
585 | #define GOT_TLS_GD_BOTH_P(type) \ | |
586 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
587 | #define GOT_TLS_GD_P(type) \ | |
588 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
589 | #define GOT_TLS_GDESC_P(type) \ | |
590 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
591 | #define GOT_TLS_GD_ANY_P(type) \ | |
592 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 593 | unsigned char tls_type; |
67a4f2b7 AO |
594 | |
595 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
596 | starting at the end of the jump table. */ | |
597 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
598 | }; |
599 | ||
600 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
601 | ||
602 | struct elf_i386_obj_tdata | |
603 | { | |
604 | struct elf_obj_tdata root; | |
605 | ||
606 | /* tls_type for each local got entry. */ | |
607 | char *local_got_tls_type; | |
67a4f2b7 AO |
608 | |
609 | /* GOTPLT entries for TLS descriptors. */ | |
610 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
611 | }; |
612 | ||
13ae64f3 JJ |
613 | #define elf_i386_tdata(abfd) \ |
614 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
615 | ||
616 | #define elf_i386_local_got_tls_type(abfd) \ | |
617 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
618 | ||
67a4f2b7 AO |
619 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
620 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
621 | ||
b34976b6 | 622 | static bfd_boolean |
55fd94b0 | 623 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 624 | { |
13ae64f3 | 625 | if (abfd->tdata.any == NULL) |
62d7a5f6 AM |
626 | { |
627 | bfd_size_type amt = sizeof (struct elf_i386_obj_tdata); | |
628 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
629 | if (abfd->tdata.any == NULL) | |
630 | return FALSE; | |
631 | } | |
632 | return bfd_elf_mkobject (abfd); | |
13ae64f3 | 633 | } |
cedb70c5 | 634 | |
252b5132 RH |
635 | /* i386 ELF linker hash table. */ |
636 | ||
637 | struct elf_i386_link_hash_table | |
638 | { | |
ebe50bae | 639 | struct elf_link_hash_table elf; |
252b5132 | 640 | |
6725bdbf AM |
641 | /* Short-cuts to get to dynamic linker sections. */ |
642 | asection *sgot; | |
643 | asection *sgotplt; | |
644 | asection *srelgot; | |
645 | asection *splt; | |
646 | asection *srelplt; | |
647 | asection *sdynbss; | |
648 | asection *srelbss; | |
9635fe29 | 649 | |
eac338cf PB |
650 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ |
651 | asection *srelplt2; | |
652 | ||
eac338cf PB |
653 | /* True if the target system is VxWorks. */ |
654 | int is_vxworks; | |
ec338859 | 655 | |
eac338cf PB |
656 | /* Value used to fill the last word of the first plt entry. */ |
657 | bfd_byte plt0_pad_byte; | |
9635fe29 | 658 | |
5ae0bfb6 RS |
659 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
660 | bfd_vma next_tls_desc_index; | |
661 | ||
13ae64f3 JJ |
662 | union { |
663 | bfd_signed_vma refcount; | |
664 | bfd_vma offset; | |
665 | } tls_ldm_got; | |
666 | ||
67a4f2b7 AO |
667 | /* The amount of space used by the reserved portion of the sgotplt |
668 | section, plus whatever space is used by the jump slots. */ | |
669 | bfd_vma sgotplt_jump_table_size; | |
670 | ||
ec338859 AM |
671 | /* Small local sym to section mapping cache. */ |
672 | struct sym_sec_cache sym_sec; | |
6725bdbf | 673 | }; |
252b5132 RH |
674 | |
675 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
676 | ||
677 | #define elf_i386_hash_table(p) \ | |
678 | ((struct elf_i386_link_hash_table *) ((p)->hash)) | |
679 | ||
67a4f2b7 | 680 | #define elf_i386_compute_jump_table_size(htab) \ |
5ae0bfb6 | 681 | ((htab)->next_tls_desc_index * 4) |
67a4f2b7 | 682 | |
252b5132 RH |
683 | /* Create an entry in an i386 ELF linker hash table. */ |
684 | ||
685 | static struct bfd_hash_entry * | |
55fd94b0 AM |
686 | link_hash_newfunc (struct bfd_hash_entry *entry, |
687 | struct bfd_hash_table *table, | |
688 | const char *string) | |
252b5132 | 689 | { |
252b5132 RH |
690 | /* Allocate the structure if it has not already been allocated by a |
691 | subclass. */ | |
ebe50bae AM |
692 | if (entry == NULL) |
693 | { | |
694 | entry = bfd_hash_allocate (table, | |
695 | sizeof (struct elf_i386_link_hash_entry)); | |
696 | if (entry == NULL) | |
697 | return entry; | |
698 | } | |
252b5132 RH |
699 | |
700 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
701 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
702 | if (entry != NULL) | |
252b5132 | 703 | { |
ebe50bae AM |
704 | struct elf_i386_link_hash_entry *eh; |
705 | ||
706 | eh = (struct elf_i386_link_hash_entry *) entry; | |
707 | eh->dyn_relocs = NULL; | |
13ae64f3 | 708 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 709 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
710 | } |
711 | ||
ebe50bae | 712 | return entry; |
252b5132 RH |
713 | } |
714 | ||
715 | /* Create an i386 ELF linker hash table. */ | |
716 | ||
717 | static struct bfd_link_hash_table * | |
55fd94b0 | 718 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
719 | { |
720 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 721 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 722 | |
55fd94b0 | 723 | ret = bfd_malloc (amt); |
ebe50bae | 724 | if (ret == NULL) |
252b5132 RH |
725 | return NULL; |
726 | ||
66eb6687 AM |
727 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
728 | sizeof (struct elf_i386_link_hash_entry))) | |
252b5132 | 729 | { |
e2d34d7d | 730 | free (ret); |
252b5132 RH |
731 | return NULL; |
732 | } | |
733 | ||
6725bdbf AM |
734 | ret->sgot = NULL; |
735 | ret->sgotplt = NULL; | |
736 | ret->srelgot = NULL; | |
737 | ret->splt = NULL; | |
738 | ret->srelplt = NULL; | |
739 | ret->sdynbss = NULL; | |
740 | ret->srelbss = NULL; | |
7a624474 | 741 | ret->tls_ldm_got.refcount = 0; |
5ae0bfb6 | 742 | ret->next_tls_desc_index = 0; |
67a4f2b7 | 743 | ret->sgotplt_jump_table_size = 0; |
ec338859 | 744 | ret->sym_sec.abfd = NULL; |
eac338cf PB |
745 | ret->is_vxworks = 0; |
746 | ret->srelplt2 = NULL; | |
eac338cf | 747 | ret->plt0_pad_byte = 0; |
6725bdbf | 748 | |
ebe50bae | 749 | return &ret->elf.root; |
252b5132 RH |
750 | } |
751 | ||
6725bdbf AM |
752 | /* Create .got, .gotplt, and .rel.got sections in DYNOBJ, and set up |
753 | shortcuts to them in our hash table. */ | |
754 | ||
b34976b6 | 755 | static bfd_boolean |
55fd94b0 | 756 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
757 | { |
758 | struct elf_i386_link_hash_table *htab; | |
759 | ||
760 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 761 | return FALSE; |
6725bdbf AM |
762 | |
763 | htab = elf_i386_hash_table (info); | |
764 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
765 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
766 | if (!htab->sgot || !htab->sgotplt) | |
767 | abort (); | |
768 | ||
3496cb2a L |
769 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rel.got", |
770 | (SEC_ALLOC | SEC_LOAD | |
771 | | SEC_HAS_CONTENTS | |
772 | | SEC_IN_MEMORY | |
773 | | SEC_LINKER_CREATED | |
774 | | SEC_READONLY)); | |
6725bdbf | 775 | if (htab->srelgot == NULL |
6725bdbf | 776 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 2)) |
b34976b6 AM |
777 | return FALSE; |
778 | return TRUE; | |
6725bdbf AM |
779 | } |
780 | ||
781 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and | |
782 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
783 | hash table. */ | |
784 | ||
b34976b6 | 785 | static bfd_boolean |
55fd94b0 | 786 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
787 | { |
788 | struct elf_i386_link_hash_table *htab; | |
789 | ||
790 | htab = elf_i386_hash_table (info); | |
791 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 792 | return FALSE; |
6725bdbf AM |
793 | |
794 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 795 | return FALSE; |
6725bdbf AM |
796 | |
797 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
798 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rel.plt"); | |
799 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
800 | if (!info->shared) | |
801 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rel.bss"); | |
802 | ||
803 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
804 | || (!info->shared && !htab->srelbss)) | |
805 | abort (); | |
806 | ||
711de32c RS |
807 | if (htab->is_vxworks |
808 | && !elf_vxworks_create_dynamic_sections (dynobj, info, &htab->srelplt2)) | |
809 | return FALSE; | |
eac338cf | 810 | |
b34976b6 | 811 | return TRUE; |
6725bdbf AM |
812 | } |
813 | ||
ebe50bae AM |
814 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
815 | ||
51b64d56 | 816 | static void |
fcfa13d2 | 817 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
818 | struct elf_link_hash_entry *dir, |
819 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
820 | { |
821 | struct elf_i386_link_hash_entry *edir, *eind; | |
822 | ||
823 | edir = (struct elf_i386_link_hash_entry *) dir; | |
824 | eind = (struct elf_i386_link_hash_entry *) ind; | |
825 | ||
bbd7ec4a | 826 | if (eind->dyn_relocs != NULL) |
ebe50bae | 827 | { |
bbd7ec4a AM |
828 | if (edir->dyn_relocs != NULL) |
829 | { | |
830 | struct elf_i386_dyn_relocs **pp; | |
831 | struct elf_i386_dyn_relocs *p; | |
832 | ||
fcfa13d2 | 833 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
834 | list. Merge any entries against the same section. */ |
835 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
836 | { | |
837 | struct elf_i386_dyn_relocs *q; | |
838 | ||
839 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
840 | if (q->sec == p->sec) | |
841 | { | |
842 | q->pc_count += p->pc_count; | |
843 | q->count += p->count; | |
844 | *pp = p->next; | |
845 | break; | |
846 | } | |
847 | if (q == NULL) | |
848 | pp = &p->next; | |
849 | } | |
850 | *pp = edir->dyn_relocs; | |
851 | } | |
852 | ||
ebe50bae AM |
853 | edir->dyn_relocs = eind->dyn_relocs; |
854 | eind->dyn_relocs = NULL; | |
855 | } | |
ebe50bae | 856 | |
cd67d266 JJ |
857 | if (ind->root.type == bfd_link_hash_indirect |
858 | && dir->got.refcount <= 0) | |
859 | { | |
860 | edir->tls_type = eind->tls_type; | |
861 | eind->tls_type = GOT_UNKNOWN; | |
862 | } | |
81848ca0 AM |
863 | |
864 | if (ELIMINATE_COPY_RELOCS | |
865 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
866 | && dir->dynamic_adjusted) |
867 | { | |
868 | /* If called to transfer flags for a weakdef during processing | |
869 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
870 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
871 | dir->ref_dynamic |= ind->ref_dynamic; | |
872 | dir->ref_regular |= ind->ref_regular; | |
873 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
874 | dir->needs_plt |= ind->needs_plt; | |
875 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
876 | } | |
81848ca0 | 877 | else |
fcfa13d2 | 878 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
ebe50bae AM |
879 | } |
880 | ||
13ae64f3 | 881 | static int |
55fd94b0 | 882 | elf_i386_tls_transition (struct bfd_link_info *info, int r_type, int is_local) |
13ae64f3 JJ |
883 | { |
884 | if (info->shared) | |
885 | return r_type; | |
886 | ||
887 | switch (r_type) | |
888 | { | |
889 | case R_386_TLS_GD: | |
67a4f2b7 AO |
890 | case R_386_TLS_GOTDESC: |
891 | case R_386_TLS_DESC_CALL: | |
13ae64f3 JJ |
892 | case R_386_TLS_IE_32: |
893 | if (is_local) | |
894 | return R_386_TLS_LE_32; | |
895 | return R_386_TLS_IE_32; | |
37e55690 JJ |
896 | case R_386_TLS_IE: |
897 | case R_386_TLS_GOTIE: | |
898 | if (is_local) | |
899 | return R_386_TLS_LE_32; | |
900 | return r_type; | |
13ae64f3 JJ |
901 | case R_386_TLS_LDM: |
902 | return R_386_TLS_LE_32; | |
903 | } | |
904 | ||
905 | return r_type; | |
906 | } | |
907 | ||
252b5132 | 908 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
909 | calculate needed space in the global offset table, procedure linkage |
910 | table, and dynamic reloc sections. */ | |
252b5132 | 911 | |
b34976b6 | 912 | static bfd_boolean |
55fd94b0 AM |
913 | elf_i386_check_relocs (bfd *abfd, |
914 | struct bfd_link_info *info, | |
915 | asection *sec, | |
916 | const Elf_Internal_Rela *relocs) | |
252b5132 | 917 | { |
6725bdbf | 918 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
919 | Elf_Internal_Shdr *symtab_hdr; |
920 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
921 | const Elf_Internal_Rela *rel; |
922 | const Elf_Internal_Rela *rel_end; | |
252b5132 RH |
923 | asection *sreloc; |
924 | ||
1049f94e | 925 | if (info->relocatable) |
b34976b6 | 926 | return TRUE; |
252b5132 | 927 | |
6725bdbf | 928 | htab = elf_i386_hash_table (info); |
252b5132 RH |
929 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
930 | sym_hashes = elf_sym_hashes (abfd); | |
252b5132 | 931 | |
252b5132 RH |
932 | sreloc = NULL; |
933 | ||
934 | rel_end = relocs + sec->reloc_count; | |
935 | for (rel = relocs; rel < rel_end; rel++) | |
936 | { | |
13ae64f3 | 937 | unsigned int r_type; |
252b5132 RH |
938 | unsigned long r_symndx; |
939 | struct elf_link_hash_entry *h; | |
940 | ||
941 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 942 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 943 | |
d9bc7a44 | 944 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 945 | { |
d003868e AM |
946 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
947 | abfd, | |
8f615d07 | 948 | r_symndx); |
b34976b6 | 949 | return FALSE; |
f5f31454 L |
950 | } |
951 | ||
252b5132 RH |
952 | if (r_symndx < symtab_hdr->sh_info) |
953 | h = NULL; | |
954 | else | |
71cb9464 L |
955 | { |
956 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
957 | while (h->root.type == bfd_link_hash_indirect | |
958 | || h->root.type == bfd_link_hash_warning) | |
959 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
960 | } | |
252b5132 | 961 | |
13ae64f3 JJ |
962 | r_type = elf_i386_tls_transition (info, r_type, h == NULL); |
963 | ||
964 | switch (r_type) | |
252b5132 | 965 | { |
37e55690 JJ |
966 | case R_386_TLS_LDM: |
967 | htab->tls_ldm_got.refcount += 1; | |
968 | goto create_got; | |
969 | ||
970 | case R_386_PLT32: | |
971 | /* This symbol requires a procedure linkage table entry. We | |
972 | actually build the entry in adjust_dynamic_symbol, | |
973 | because this might be a case of linking PIC code which is | |
974 | never referenced by a dynamic object, in which case we | |
975 | don't need to generate a procedure linkage table entry | |
976 | after all. */ | |
977 | ||
978 | /* If this is a local symbol, we resolve it directly without | |
979 | creating a procedure linkage table entry. */ | |
980 | if (h == NULL) | |
981 | continue; | |
982 | ||
f5385ebf | 983 | h->needs_plt = 1; |
37e55690 JJ |
984 | h->plt.refcount += 1; |
985 | break; | |
986 | ||
13ae64f3 | 987 | case R_386_TLS_IE_32: |
37e55690 JJ |
988 | case R_386_TLS_IE: |
989 | case R_386_TLS_GOTIE: | |
13ae64f3 JJ |
990 | if (info->shared) |
991 | info->flags |= DF_STATIC_TLS; | |
37e55690 JJ |
992 | /* Fall through */ |
993 | ||
252b5132 | 994 | case R_386_GOT32: |
13ae64f3 | 995 | case R_386_TLS_GD: |
67a4f2b7 AO |
996 | case R_386_TLS_GOTDESC: |
997 | case R_386_TLS_DESC_CALL: | |
252b5132 | 998 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
999 | { |
1000 | int tls_type, old_tls_type; | |
1001 | ||
1002 | switch (r_type) | |
1003 | { | |
1004 | default: | |
1005 | case R_386_GOT32: tls_type = GOT_NORMAL; break; | |
1006 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; | |
67a4f2b7 AO |
1007 | case R_386_TLS_GOTDESC: |
1008 | case R_386_TLS_DESC_CALL: | |
1009 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1010 | case R_386_TLS_IE_32: |
1011 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1012 | tls_type = GOT_TLS_IE_NEG; | |
1013 | else | |
ebcfb3c0 JJ |
1014 | /* If this is a GD->IE transition, we may use either of |
1015 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1016 | tls_type = GOT_TLS_IE; |
1017 | break; | |
1018 | case R_386_TLS_IE: | |
1019 | case R_386_TLS_GOTIE: | |
1020 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1021 | } |
1022 | ||
1023 | if (h != NULL) | |
1024 | { | |
1025 | h->got.refcount += 1; | |
1026 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
1027 | } | |
1028 | else | |
1029 | { | |
1030 | bfd_signed_vma *local_got_refcounts; | |
1031 | ||
1032 | /* This is a global offset table entry for a local symbol. */ | |
1033 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1034 | if (local_got_refcounts == NULL) | |
1035 | { | |
1036 | bfd_size_type size; | |
1037 | ||
1038 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1039 | size *= (sizeof (bfd_signed_vma) |
1040 | + sizeof (bfd_vma) + sizeof(char)); | |
55fd94b0 | 1041 | local_got_refcounts = bfd_zalloc (abfd, size); |
13ae64f3 | 1042 | if (local_got_refcounts == NULL) |
b34976b6 | 1043 | return FALSE; |
13ae64f3 | 1044 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1045 | elf_i386_local_tlsdesc_gotent (abfd) |
1046 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 1047 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 1048 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1049 | } |
1050 | local_got_refcounts[r_symndx] += 1; | |
1051 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
1052 | } | |
1053 | ||
37e55690 JJ |
1054 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1055 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1056 | /* If a TLS symbol is accessed using IE at least once, |
1057 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1058 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1059 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1060 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1061 | { |
67a4f2b7 | 1062 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1063 | tls_type = old_tls_type; |
67a4f2b7 AO |
1064 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1065 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1066 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1067 | else |
1068 | { | |
1069 | (*_bfd_error_handler) | |
d003868e | 1070 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1071 | "thread local symbol"), |
d003868e | 1072 | abfd, |
37e55690 | 1073 | h ? h->root.root.string : "<local>"); |
b34976b6 | 1074 | return FALSE; |
13ae64f3 JJ |
1075 | } |
1076 | } | |
1077 | ||
1078 | if (old_tls_type != tls_type) | |
1079 | { | |
1080 | if (h != NULL) | |
1081 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
1082 | else | |
1083 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1084 | } | |
1085 | } | |
0ac8d2ca AM |
1086 | /* Fall through */ |
1087 | ||
1088 | case R_386_GOTOFF: | |
1089 | case R_386_GOTPC: | |
13ae64f3 | 1090 | create_got: |
0ac8d2ca AM |
1091 | if (htab->sgot == NULL) |
1092 | { | |
1093 | if (htab->elf.dynobj == NULL) | |
1094 | htab->elf.dynobj = abfd; | |
1095 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 1096 | return FALSE; |
0ac8d2ca | 1097 | } |
37e55690 JJ |
1098 | if (r_type != R_386_TLS_IE) |
1099 | break; | |
1100 | /* Fall through */ | |
252b5132 | 1101 | |
37e55690 JJ |
1102 | case R_386_TLS_LE_32: |
1103 | case R_386_TLS_LE: | |
1104 | if (!info->shared) | |
1105 | break; | |
bffbf940 | 1106 | info->flags |= DF_STATIC_TLS; |
b34976b6 | 1107 | /* Fall through */ |
252b5132 RH |
1108 | |
1109 | case R_386_32: | |
1110 | case R_386_PC32: | |
12d0ee4a | 1111 | if (h != NULL && !info->shared) |
6725bdbf | 1112 | { |
12d0ee4a | 1113 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1114 | need a copy reloc. We can't check reliably at this |
1115 | stage whether the section is read-only, as input | |
1116 | sections have not yet been mapped to output sections. | |
1117 | Tentatively set the flag for now, and correct in | |
1118 | adjust_dynamic_symbol. */ | |
f5385ebf | 1119 | h->non_got_ref = 1; |
12d0ee4a AM |
1120 | |
1121 | /* We may need a .plt entry if the function this reloc | |
1122 | refers to is in a shared lib. */ | |
51b64d56 | 1123 | h->plt.refcount += 1; |
c6585bbb | 1124 | if (r_type != R_386_PC32) |
f5385ebf | 1125 | h->pointer_equality_needed = 1; |
6725bdbf | 1126 | } |
7843f00e | 1127 | |
252b5132 | 1128 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1129 | against a global symbol, or a non PC relative reloc |
1130 | against a local symbol, then we need to copy the reloc | |
1131 | into the shared library. However, if we are linking with | |
1132 | -Bsymbolic, we do not need to copy a reloc against a | |
1133 | global symbol which is defined in an object we are | |
1134 | including in the link (i.e., DEF_REGULAR is set). At | |
1135 | this point we have not seen all the input files, so it is | |
1136 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1137 | later (it is never cleared). In case of a weak definition, |
1138 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1139 | a shared library. We account for that possibility below by |
1f655a09 L |
1140 | storing information in the relocs_copied field of the hash |
1141 | table entry. A similar situation occurs when creating | |
1142 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1143 | symbol local. |
56882138 | 1144 | |
12d0ee4a AM |
1145 | If on the other hand, we are creating an executable, we |
1146 | may need to keep relocations for symbols satisfied by a | |
1147 | dynamic library if we manage to avoid copy relocs for the | |
1148 | symbol. */ | |
1149 | if ((info->shared | |
1150 | && (sec->flags & SEC_ALLOC) != 0 | |
13ae64f3 | 1151 | && (r_type != R_386_PC32 |
12d0ee4a | 1152 | || (h != NULL |
55255dae | 1153 | && (! SYMBOLIC_BIND (info, h) |
12d0ee4a | 1154 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1155 | || !h->def_regular)))) |
a23b6845 AM |
1156 | || (ELIMINATE_COPY_RELOCS |
1157 | && !info->shared | |
12d0ee4a AM |
1158 | && (sec->flags & SEC_ALLOC) != 0 |
1159 | && h != NULL | |
12d0ee4a | 1160 | && (h->root.type == bfd_link_hash_defweak |
f5385ebf | 1161 | || !h->def_regular))) |
252b5132 | 1162 | { |
ec338859 AM |
1163 | struct elf_i386_dyn_relocs *p; |
1164 | struct elf_i386_dyn_relocs **head; | |
1165 | ||
12d0ee4a AM |
1166 | /* We must copy these reloc types into the output file. |
1167 | Create a reloc section in dynobj and make room for | |
1168 | this reloc. */ | |
252b5132 RH |
1169 | if (sreloc == NULL) |
1170 | { | |
1171 | const char *name; | |
0ac8d2ca | 1172 | bfd *dynobj; |
e92d460e AM |
1173 | unsigned int strndx = elf_elfheader (abfd)->e_shstrndx; |
1174 | unsigned int shnam = elf_section_data (sec)->rel_hdr.sh_name; | |
252b5132 | 1175 | |
e92d460e | 1176 | name = bfd_elf_string_from_elf_section (abfd, strndx, shnam); |
252b5132 | 1177 | if (name == NULL) |
b34976b6 | 1178 | return FALSE; |
252b5132 | 1179 | |
0112cd26 | 1180 | if (! CONST_STRNEQ (name, ".rel") |
c8492176 L |
1181 | || strcmp (bfd_get_section_name (abfd, sec), |
1182 | name + 4) != 0) | |
1183 | { | |
0c715baa | 1184 | (*_bfd_error_handler) |
d003868e AM |
1185 | (_("%B: bad relocation section name `%s\'"), |
1186 | abfd, name); | |
f5f31454 | 1187 | } |
252b5132 | 1188 | |
0ac8d2ca AM |
1189 | if (htab->elf.dynobj == NULL) |
1190 | htab->elf.dynobj = abfd; | |
1191 | ||
1192 | dynobj = htab->elf.dynobj; | |
252b5132 RH |
1193 | sreloc = bfd_get_section_by_name (dynobj, name); |
1194 | if (sreloc == NULL) | |
1195 | { | |
1196 | flagword flags; | |
1197 | ||
252b5132 RH |
1198 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
1199 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1200 | if ((sec->flags & SEC_ALLOC) != 0) | |
1201 | flags |= SEC_ALLOC | SEC_LOAD; | |
3496cb2a L |
1202 | sreloc = bfd_make_section_with_flags (dynobj, |
1203 | name, | |
1204 | flags); | |
252b5132 | 1205 | if (sreloc == NULL |
252b5132 | 1206 | || ! bfd_set_section_alignment (dynobj, sreloc, 2)) |
b34976b6 | 1207 | return FALSE; |
252b5132 | 1208 | } |
0c715baa | 1209 | elf_section_data (sec)->sreloc = sreloc; |
252b5132 RH |
1210 | } |
1211 | ||
0c715baa AM |
1212 | /* If this is a global symbol, we count the number of |
1213 | relocations we need for this symbol. */ | |
1214 | if (h != NULL) | |
252b5132 | 1215 | { |
ec338859 | 1216 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; |
0c715baa AM |
1217 | } |
1218 | else | |
1219 | { | |
e81d3500 | 1220 | void **vpp; |
ec338859 AM |
1221 | /* Track dynamic relocs needed for local syms too. |
1222 | We really need local syms available to do this | |
1223 | easily. Oh well. */ | |
1224 | ||
1225 | asection *s; | |
1226 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1227 | sec, r_symndx); | |
1228 | if (s == NULL) | |
b34976b6 | 1229 | return FALSE; |
ec338859 | 1230 | |
e81d3500 DD |
1231 | vpp = &elf_section_data (s)->local_dynrel; |
1232 | head = (struct elf_i386_dyn_relocs **)vpp; | |
ec338859 AM |
1233 | } |
1234 | ||
1235 | p = *head; | |
1236 | if (p == NULL || p->sec != sec) | |
1237 | { | |
1238 | bfd_size_type amt = sizeof *p; | |
55fd94b0 | 1239 | p = bfd_alloc (htab->elf.dynobj, amt); |
ec338859 | 1240 | if (p == NULL) |
b34976b6 | 1241 | return FALSE; |
ec338859 AM |
1242 | p->next = *head; |
1243 | *head = p; | |
1244 | p->sec = sec; | |
1245 | p->count = 0; | |
1246 | p->pc_count = 0; | |
252b5132 | 1247 | } |
ec338859 AM |
1248 | |
1249 | p->count += 1; | |
13ae64f3 | 1250 | if (r_type == R_386_PC32) |
ec338859 | 1251 | p->pc_count += 1; |
252b5132 | 1252 | } |
252b5132 RH |
1253 | break; |
1254 | ||
1255 | /* This relocation describes the C++ object vtable hierarchy. | |
1256 | Reconstruct it for later use during GC. */ | |
1257 | case R_386_GNU_VTINHERIT: | |
c152c796 | 1258 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1259 | return FALSE; |
252b5132 RH |
1260 | break; |
1261 | ||
1262 | /* This relocation describes which C++ vtable entries are actually | |
1263 | used. Record for later use during GC. */ | |
1264 | case R_386_GNU_VTENTRY: | |
c152c796 | 1265 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1266 | return FALSE; |
252b5132 RH |
1267 | break; |
1268 | ||
1269 | default: | |
1270 | break; | |
1271 | } | |
1272 | } | |
1273 | ||
b34976b6 | 1274 | return TRUE; |
252b5132 RH |
1275 | } |
1276 | ||
1277 | /* Return the section that should be marked against GC for a given | |
1278 | relocation. */ | |
1279 | ||
1280 | static asection * | |
55fd94b0 | 1281 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 1282 | struct bfd_link_info *info, |
55fd94b0 AM |
1283 | Elf_Internal_Rela *rel, |
1284 | struct elf_link_hash_entry *h, | |
1285 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1286 | { |
1287 | if (h != NULL) | |
07adf181 AM |
1288 | switch (ELF32_R_TYPE (rel->r_info)) |
1289 | { | |
1290 | case R_386_GNU_VTINHERIT: | |
1291 | case R_386_GNU_VTENTRY: | |
1292 | return NULL; | |
1293 | } | |
1294 | ||
1295 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1296 | } |
1297 | ||
1298 | /* Update the got entry reference counts for the section being removed. */ | |
1299 | ||
b34976b6 | 1300 | static bfd_boolean |
55fd94b0 AM |
1301 | elf_i386_gc_sweep_hook (bfd *abfd, |
1302 | struct bfd_link_info *info, | |
1303 | asection *sec, | |
1304 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1305 | { |
dd5724d5 AM |
1306 | Elf_Internal_Shdr *symtab_hdr; |
1307 | struct elf_link_hash_entry **sym_hashes; | |
1308 | bfd_signed_vma *local_got_refcounts; | |
1309 | const Elf_Internal_Rela *rel, *relend; | |
dd5724d5 | 1310 | |
ec338859 | 1311 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1312 | |
6725bdbf AM |
1313 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
1314 | sym_hashes = elf_sym_hashes (abfd); | |
1315 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1316 | |
1317 | relend = relocs + sec->reloc_count; | |
1318 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1319 | { |
1320 | unsigned long r_symndx; | |
1321 | unsigned int r_type; | |
1322 | struct elf_link_hash_entry *h = NULL; | |
37e55690 | 1323 | |
26e41594 AM |
1324 | r_symndx = ELF32_R_SYM (rel->r_info); |
1325 | if (r_symndx >= symtab_hdr->sh_info) | |
1326 | { | |
1327 | struct elf_i386_link_hash_entry *eh; | |
1328 | struct elf_i386_dyn_relocs **pp; | |
1329 | struct elf_i386_dyn_relocs *p; | |
dd5724d5 | 1330 | |
26e41594 | 1331 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1332 | while (h->root.type == bfd_link_hash_indirect |
1333 | || h->root.type == bfd_link_hash_warning) | |
1334 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1335 | eh = (struct elf_i386_link_hash_entry *) h; |
0c715baa | 1336 | |
26e41594 AM |
1337 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1338 | if (p->sec == sec) | |
1339 | { | |
1340 | /* Everything must go for SEC. */ | |
1341 | *pp = p->next; | |
1342 | break; | |
1343 | } | |
1344 | } | |
0c715baa | 1345 | |
26e41594 AM |
1346 | r_type = ELF32_R_TYPE (rel->r_info); |
1347 | r_type = elf_i386_tls_transition (info, r_type, h != NULL); | |
1348 | switch (r_type) | |
1349 | { | |
1350 | case R_386_TLS_LDM: | |
1351 | if (elf_i386_hash_table (info)->tls_ldm_got.refcount > 0) | |
1352 | elf_i386_hash_table (info)->tls_ldm_got.refcount -= 1; | |
1353 | break; | |
0c715baa | 1354 | |
26e41594 | 1355 | case R_386_TLS_GD: |
67a4f2b7 AO |
1356 | case R_386_TLS_GOTDESC: |
1357 | case R_386_TLS_DESC_CALL: | |
26e41594 AM |
1358 | case R_386_TLS_IE_32: |
1359 | case R_386_TLS_IE: | |
1360 | case R_386_TLS_GOTIE: | |
1361 | case R_386_GOT32: | |
1362 | if (h != NULL) | |
1363 | { | |
1364 | if (h->got.refcount > 0) | |
1365 | h->got.refcount -= 1; | |
1366 | } | |
1367 | else if (local_got_refcounts != NULL) | |
1368 | { | |
1369 | if (local_got_refcounts[r_symndx] > 0) | |
1370 | local_got_refcounts[r_symndx] -= 1; | |
1371 | } | |
1372 | break; | |
0c715baa | 1373 | |
26e41594 AM |
1374 | case R_386_32: |
1375 | case R_386_PC32: | |
1376 | if (info->shared) | |
1377 | break; | |
1378 | /* Fall through */ | |
6725bdbf | 1379 | |
26e41594 AM |
1380 | case R_386_PLT32: |
1381 | if (h != NULL) | |
1382 | { | |
1383 | if (h->plt.refcount > 0) | |
1384 | h->plt.refcount -= 1; | |
1385 | } | |
1386 | break; | |
dd5724d5 | 1387 | |
26e41594 AM |
1388 | default: |
1389 | break; | |
1390 | } | |
1391 | } | |
252b5132 | 1392 | |
b34976b6 | 1393 | return TRUE; |
252b5132 RH |
1394 | } |
1395 | ||
1396 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1397 | regular object. The current definition is in some section of the | |
1398 | dynamic object, but we're not including those sections. We have to | |
1399 | change the definition to something the rest of the link can | |
1400 | understand. */ | |
1401 | ||
b34976b6 | 1402 | static bfd_boolean |
55fd94b0 AM |
1403 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
1404 | struct elf_link_hash_entry *h) | |
252b5132 | 1405 | { |
6725bdbf | 1406 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1407 | asection *s; |
1408 | unsigned int power_of_two; | |
1409 | ||
252b5132 RH |
1410 | /* If this is a function, put it in the procedure linkage table. We |
1411 | will fill in the contents of the procedure linkage table later, | |
1412 | when we know the address of the .got section. */ | |
1413 | if (h->type == STT_FUNC | |
f5385ebf | 1414 | || h->needs_plt) |
252b5132 | 1415 | { |
6725bdbf | 1416 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
1417 | || SYMBOL_CALLS_LOCAL (info, h) |
1418 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1419 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
1420 | { |
1421 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
1422 | file, but the symbol was never referred to by a dynamic |
1423 | object, or if all references were garbage collected. In | |
1424 | such a case, we don't actually need to build a procedure | |
1425 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 1426 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1427 | h->needs_plt = 0; |
252b5132 RH |
1428 | } |
1429 | ||
b34976b6 | 1430 | return TRUE; |
252b5132 | 1431 | } |
6725bdbf AM |
1432 | else |
1433 | /* It's possible that we incorrectly decided a .plt reloc was | |
1434 | needed for an R_386_PC32 reloc to a non-function sym in | |
1435 | check_relocs. We can't decide accurately between function and | |
1436 | non-function syms in check-relocs; Objects loaded later in | |
1437 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1438 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
1439 | |
1440 | /* If this is a weak symbol, and there is a real definition, the | |
1441 | processor independent code will have arranged for us to see the | |
1442 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 1443 | if (h->u.weakdef != NULL) |
252b5132 | 1444 | { |
f6e332e6 AM |
1445 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1446 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1447 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1448 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 1449 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1450 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1451 | return TRUE; |
252b5132 RH |
1452 | } |
1453 | ||
1454 | /* This is a reference to a symbol defined by a dynamic object which | |
1455 | is not a function. */ | |
1456 | ||
1457 | /* If we are creating a shared library, we must presume that the | |
1458 | only references to the symbol are via the global offset table. | |
1459 | For such cases we need not do anything here; the relocations will | |
1460 | be handled correctly by relocate_section. */ | |
1461 | if (info->shared) | |
b34976b6 | 1462 | return TRUE; |
252b5132 | 1463 | |
7843f00e ILT |
1464 | /* If there are no references to this symbol that do not use the |
1465 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1466 | if (!h->non_got_ref) |
b34976b6 | 1467 | return TRUE; |
7843f00e | 1468 | |
8bd621d8 AM |
1469 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1470 | if (info->nocopyreloc) | |
1471 | { | |
f5385ebf | 1472 | h->non_got_ref = 0; |
b34976b6 | 1473 | return TRUE; |
8bd621d8 AM |
1474 | } |
1475 | ||
643796e3 DJ |
1476 | htab = elf_i386_hash_table (info); |
1477 | ||
1478 | /* If there aren't any dynamic relocs in read-only sections, then | |
1479 | we can keep the dynamic relocs and avoid the copy reloc. This | |
1480 | doesn't work on VxWorks, where we can not have dynamic relocations | |
1481 | (other than copy and jump slot relocations) in an executable. */ | |
1482 | if (ELIMINATE_COPY_RELOCS && !htab->is_vxworks) | |
ebe50bae | 1483 | { |
a23b6845 AM |
1484 | struct elf_i386_link_hash_entry * eh; |
1485 | struct elf_i386_dyn_relocs *p; | |
ebe50bae | 1486 | |
a23b6845 AM |
1487 | eh = (struct elf_i386_link_hash_entry *) h; |
1488 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1489 | { | |
1490 | s = p->sec->output_section; | |
1491 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1492 | break; | |
1493 | } | |
1494 | ||
a23b6845 AM |
1495 | if (p == NULL) |
1496 | { | |
f5385ebf | 1497 | h->non_got_ref = 0; |
a23b6845 AM |
1498 | return TRUE; |
1499 | } | |
ebe50bae AM |
1500 | } |
1501 | ||
909272ee AM |
1502 | if (h->size == 0) |
1503 | { | |
1504 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1505 | h->root.root.string); | |
1506 | return TRUE; | |
1507 | } | |
1508 | ||
252b5132 RH |
1509 | /* We must allocate the symbol in our .dynbss section, which will |
1510 | become part of the .bss section of the executable. There will be | |
1511 | an entry for this symbol in the .dynsym section. The dynamic | |
1512 | object will contain position independent code, so all references | |
1513 | from the dynamic object to this symbol will go through the global | |
1514 | offset table. The dynamic linker will use the .dynsym entry to | |
1515 | determine the address it must put in the global offset table, so | |
1516 | both the dynamic object and the regular object will refer to the | |
1517 | same memory location for the variable. */ | |
1518 | ||
252b5132 RH |
1519 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
1520 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 1521 | runtime process image. */ |
252b5132 RH |
1522 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1523 | { | |
eea6121a | 1524 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 1525 | h->needs_copy = 1; |
252b5132 RH |
1526 | } |
1527 | ||
1528 | /* We need to figure out the alignment required for this symbol. I | |
1529 | have no idea how ELF linkers handle this. */ | |
1530 | power_of_two = bfd_log2 (h->size); | |
1531 | if (power_of_two > 3) | |
1532 | power_of_two = 3; | |
1533 | ||
1534 | /* Apply the required alignment. */ | |
0ac8d2ca | 1535 | s = htab->sdynbss; |
eea6121a | 1536 | s->size = BFD_ALIGN (s->size, (bfd_size_type) (1 << power_of_two)); |
0ac8d2ca | 1537 | if (power_of_two > bfd_get_section_alignment (htab->elf.dynobj, s)) |
252b5132 | 1538 | { |
0ac8d2ca | 1539 | if (! bfd_set_section_alignment (htab->elf.dynobj, s, power_of_two)) |
b34976b6 | 1540 | return FALSE; |
252b5132 RH |
1541 | } |
1542 | ||
1543 | /* Define the symbol as being at this point in the section. */ | |
1544 | h->root.u.def.section = s; | |
eea6121a | 1545 | h->root.u.def.value = s->size; |
252b5132 RH |
1546 | |
1547 | /* Increment the section size to make room for the symbol. */ | |
eea6121a | 1548 | s->size += h->size; |
252b5132 | 1549 | |
b34976b6 | 1550 | return TRUE; |
252b5132 RH |
1551 | } |
1552 | ||
6725bdbf | 1553 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 1554 | dynamic relocs. */ |
6725bdbf | 1555 | |
b34976b6 | 1556 | static bfd_boolean |
55fd94b0 | 1557 | allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
1558 | { |
1559 | struct bfd_link_info *info; | |
1560 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 1561 | struct elf_i386_link_hash_entry *eh; |
0c715baa | 1562 | struct elf_i386_dyn_relocs *p; |
6725bdbf | 1563 | |
e92d460e | 1564 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1565 | return TRUE; |
6725bdbf | 1566 | |
e92d460e AM |
1567 | if (h->root.type == bfd_link_hash_warning) |
1568 | /* When warning symbols are created, they **replace** the "real" | |
1569 | entry in the hash table, thus we never get to see the real | |
1570 | symbol in a hash traversal. So look at it now. */ | |
1571 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1572 | ||
6725bdbf AM |
1573 | info = (struct bfd_link_info *) inf; |
1574 | htab = elf_i386_hash_table (info); | |
1575 | ||
ebe50bae | 1576 | if (htab->elf.dynamic_sections_created |
9c7a29a3 | 1577 | && h->plt.refcount > 0) |
6725bdbf | 1578 | { |
5a15f56f AM |
1579 | /* Make sure this symbol is output as a dynamic symbol. |
1580 | Undefined weak syms won't yet be marked as dynamic. */ | |
1581 | if (h->dynindx == -1 | |
f5385ebf | 1582 | && !h->forced_local) |
5a15f56f | 1583 | { |
c152c796 | 1584 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1585 | return FALSE; |
5a15f56f AM |
1586 | } |
1587 | ||
4e795f50 AM |
1588 | if (info->shared |
1589 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
ced53ee5 | 1590 | { |
0ac8d2ca | 1591 | asection *s = htab->splt; |
6725bdbf | 1592 | |
ced53ee5 AM |
1593 | /* If this is the first .plt entry, make room for the special |
1594 | first entry. */ | |
eea6121a AM |
1595 | if (s->size == 0) |
1596 | s->size += PLT_ENTRY_SIZE; | |
6725bdbf | 1597 | |
eea6121a | 1598 | h->plt.offset = s->size; |
6725bdbf | 1599 | |
ced53ee5 AM |
1600 | /* If this symbol is not defined in a regular file, and we are |
1601 | not generating a shared library, then set the symbol to this | |
1602 | location in the .plt. This is required to make function | |
1603 | pointers compare as equal between the normal executable and | |
1604 | the shared library. */ | |
1605 | if (! info->shared | |
f5385ebf | 1606 | && !h->def_regular) |
ced53ee5 AM |
1607 | { |
1608 | h->root.u.def.section = s; | |
1609 | h->root.u.def.value = h->plt.offset; | |
1610 | } | |
6725bdbf | 1611 | |
ced53ee5 | 1612 | /* Make room for this entry. */ |
eea6121a | 1613 | s->size += PLT_ENTRY_SIZE; |
6725bdbf | 1614 | |
ced53ee5 AM |
1615 | /* We also need to make an entry in the .got.plt section, which |
1616 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1617 | htab->sgotplt->size += 4; |
6725bdbf | 1618 | |
6725bdbf | 1619 | /* We also need to make an entry in the .rel.plt section. */ |
eea6121a | 1620 | htab->srelplt->size += sizeof (Elf32_External_Rel); |
5ae0bfb6 | 1621 | htab->next_tls_desc_index++; |
eac338cf PB |
1622 | |
1623 | if (htab->is_vxworks && !info->shared) | |
1624 | { | |
1625 | /* VxWorks has a second set of relocations for each PLT entry | |
1626 | in executables. They go in a separate relocation section, | |
1627 | which is processed by the kernel loader. */ | |
1628 | ||
1629 | /* There are two relocations for the initial PLT entry: an | |
1630 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
1631 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
1632 | ||
1633 | if (h->plt.offset == PLT_ENTRY_SIZE) | |
1634 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
1635 | ||
1636 | /* There are two extra relocations for each subsequent PLT entry: | |
1637 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
1638 | relocation for the PLT entry. */ | |
1639 | ||
1640 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
1641 | } | |
6725bdbf | 1642 | } |
ced53ee5 AM |
1643 | else |
1644 | { | |
51b64d56 | 1645 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1646 | h->needs_plt = 0; |
ced53ee5 | 1647 | } |
6725bdbf AM |
1648 | } |
1649 | else | |
1650 | { | |
51b64d56 | 1651 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1652 | h->needs_plt = 0; |
6725bdbf AM |
1653 | } |
1654 | ||
67a4f2b7 AO |
1655 | eh = (struct elf_i386_link_hash_entry *) h; |
1656 | eh->tlsdesc_got = (bfd_vma) -1; | |
1657 | ||
37e55690 | 1658 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
1659 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
1660 | if (h->got.refcount > 0 | |
1661 | && !info->shared | |
1662 | && h->dynindx == -1 | |
37e55690 | 1663 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 1664 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 1665 | else if (h->got.refcount > 0) |
6725bdbf | 1666 | { |
0ac8d2ca | 1667 | asection *s; |
b34976b6 | 1668 | bfd_boolean dyn; |
13ae64f3 | 1669 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 1670 | |
5a15f56f AM |
1671 | /* Make sure this symbol is output as a dynamic symbol. |
1672 | Undefined weak syms won't yet be marked as dynamic. */ | |
1673 | if (h->dynindx == -1 | |
f5385ebf | 1674 | && !h->forced_local) |
5a15f56f | 1675 | { |
c152c796 | 1676 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1677 | return FALSE; |
5a15f56f AM |
1678 | } |
1679 | ||
6725bdbf | 1680 | s = htab->sgot; |
67a4f2b7 AO |
1681 | if (GOT_TLS_GDESC_P (tls_type)) |
1682 | { | |
1683 | eh->tlsdesc_got = htab->sgotplt->size | |
1684 | - elf_i386_compute_jump_table_size (htab); | |
1685 | htab->sgotplt->size += 8; | |
1686 | h->got.offset = (bfd_vma) -2; | |
1687 | } | |
1688 | if (! GOT_TLS_GDESC_P (tls_type) | |
1689 | || GOT_TLS_GD_P (tls_type)) | |
1690 | { | |
1691 | h->got.offset = s->size; | |
1692 | s->size += 4; | |
1693 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
1694 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
1695 | s->size += 4; | |
1696 | } | |
ebe50bae | 1697 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 1698 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
1699 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
1700 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
1701 | need two), R_386_TLS_GD needs one if local symbol and two if | |
1702 | global. */ | |
1703 | if (tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 1704 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 1705 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 1706 | || (tls_type & GOT_TLS_IE)) |
eea6121a | 1707 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 1708 | else if (GOT_TLS_GD_P (tls_type)) |
eea6121a | 1709 | htab->srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
1710 | else if (! GOT_TLS_GDESC_P (tls_type) |
1711 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1712 | || h->root.type != bfd_link_hash_undefweak) | |
ef5aade5 L |
1713 | && (info->shared |
1714 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1715 | htab->srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
1716 | if (GOT_TLS_GDESC_P (tls_type)) |
1717 | htab->srelplt->size += sizeof (Elf32_External_Rel); | |
6725bdbf AM |
1718 | } |
1719 | else | |
51b64d56 | 1720 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 1721 | |
5a15f56f | 1722 | if (eh->dyn_relocs == NULL) |
b34976b6 | 1723 | return TRUE; |
5a15f56f | 1724 | |
0c715baa AM |
1725 | /* In the shared -Bsymbolic case, discard space allocated for |
1726 | dynamic pc-relative relocs against symbols which turn out to be | |
1727 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
1728 | space for pc-relative relocs that have become local due to symbol |
1729 | visibility changes. */ | |
0c715baa AM |
1730 | |
1731 | if (info->shared) | |
5a15f56f | 1732 | { |
09695f56 AM |
1733 | /* The only reloc that uses pc_count is R_386_PC32, which will |
1734 | appear on a call or on something like ".long foo - .". We | |
1735 | want calls to protected symbols to resolve directly to the | |
1736 | function rather than going via the plt. If people want | |
1737 | function pointer comparisons to work as expected then they | |
1738 | should avoid writing assembly like ".long foo - .". */ | |
1739 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 1740 | { |
0c715baa AM |
1741 | struct elf_i386_dyn_relocs **pp; |
1742 | ||
1743 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1744 | { | |
1745 | p->count -= p->pc_count; | |
1746 | p->pc_count = 0; | |
1747 | if (p->count == 0) | |
1748 | *pp = p->next; | |
1749 | else | |
1750 | pp = &p->next; | |
1751 | } | |
5a15f56f | 1752 | } |
4e795f50 AM |
1753 | |
1754 | /* Also discard relocs on undefined weak syms with non-default | |
1755 | visibility. */ | |
22d606e9 | 1756 | if (eh->dyn_relocs != NULL |
4e795f50 | 1757 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
1758 | { |
1759 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
1760 | eh->dyn_relocs = NULL; | |
1761 | ||
1762 | /* Make sure undefined weak symbols are output as a dynamic | |
1763 | symbol in PIEs. */ | |
1764 | else if (h->dynindx == -1 | |
1765 | && !h->forced_local) | |
1766 | { | |
1767 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1768 | return FALSE; | |
1769 | } | |
1770 | } | |
0c715baa | 1771 | } |
a23b6845 | 1772 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
1773 | { |
1774 | /* For the non-shared case, discard space for relocs against | |
1775 | symbols which turn out to need copy relocs or are not | |
1776 | dynamic. */ | |
1777 | ||
f5385ebf AM |
1778 | if (!h->non_got_ref |
1779 | && ((h->def_dynamic | |
1780 | && !h->def_regular) | |
ebe50bae | 1781 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
1782 | && (h->root.type == bfd_link_hash_undefweak |
1783 | || h->root.type == bfd_link_hash_undefined)))) | |
1784 | { | |
1785 | /* Make sure this symbol is output as a dynamic symbol. | |
1786 | Undefined weak syms won't yet be marked as dynamic. */ | |
1787 | if (h->dynindx == -1 | |
f5385ebf | 1788 | && !h->forced_local) |
0c715baa | 1789 | { |
c152c796 | 1790 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1791 | return FALSE; |
0c715baa | 1792 | } |
5a15f56f | 1793 | |
0c715baa AM |
1794 | /* If that succeeded, we know we'll be keeping all the |
1795 | relocs. */ | |
1796 | if (h->dynindx != -1) | |
1797 | goto keep; | |
1798 | } | |
1799 | ||
1800 | eh->dyn_relocs = NULL; | |
1801 | ||
ec338859 | 1802 | keep: ; |
5a15f56f AM |
1803 | } |
1804 | ||
0c715baa AM |
1805 | /* Finally, allocate space. */ |
1806 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 1807 | { |
0c715baa | 1808 | asection *sreloc = elf_section_data (p->sec)->sreloc; |
eea6121a | 1809 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
1810 | } |
1811 | ||
b34976b6 | 1812 | return TRUE; |
6725bdbf AM |
1813 | } |
1814 | ||
0c715baa AM |
1815 | /* Find any dynamic relocs that apply to read-only sections. */ |
1816 | ||
b34976b6 | 1817 | static bfd_boolean |
55fd94b0 | 1818 | readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
1819 | { |
1820 | struct elf_i386_link_hash_entry *eh; | |
1821 | struct elf_i386_dyn_relocs *p; | |
1822 | ||
e92d460e AM |
1823 | if (h->root.type == bfd_link_hash_warning) |
1824 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1825 | ||
0c715baa AM |
1826 | eh = (struct elf_i386_link_hash_entry *) h; |
1827 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1828 | { | |
1829 | asection *s = p->sec->output_section; | |
1830 | ||
1831 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1832 | { | |
1833 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1834 | ||
1835 | info->flags |= DF_TEXTREL; | |
1836 | ||
1837 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1838 | return FALSE; |
0c715baa AM |
1839 | } |
1840 | } | |
b34976b6 | 1841 | return TRUE; |
0c715baa AM |
1842 | } |
1843 | ||
252b5132 RH |
1844 | /* Set the sizes of the dynamic sections. */ |
1845 | ||
b34976b6 | 1846 | static bfd_boolean |
55fd94b0 AM |
1847 | elf_i386_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1848 | struct bfd_link_info *info) | |
252b5132 | 1849 | { |
6725bdbf | 1850 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1851 | bfd *dynobj; |
1852 | asection *s; | |
b34976b6 | 1853 | bfd_boolean relocs; |
0c715baa | 1854 | bfd *ibfd; |
252b5132 | 1855 | |
6725bdbf | 1856 | htab = elf_i386_hash_table (info); |
ebe50bae | 1857 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
1858 | if (dynobj == NULL) |
1859 | abort (); | |
252b5132 | 1860 | |
ebe50bae | 1861 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
1862 | { |
1863 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1864 | if (info->executable) |
252b5132 RH |
1865 | { |
1866 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
ffb2e45b AM |
1867 | if (s == NULL) |
1868 | abort (); | |
eea6121a | 1869 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
1870 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1871 | } | |
161d71a6 | 1872 | } |
6725bdbf | 1873 | |
0c715baa AM |
1874 | /* Set up .got offsets for local syms, and space for local dynamic |
1875 | relocs. */ | |
1876 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
161d71a6 L |
1877 | { |
1878 | bfd_signed_vma *local_got; | |
1879 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 1880 | char *local_tls_type; |
67a4f2b7 | 1881 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
1882 | bfd_size_type locsymcount; |
1883 | Elf_Internal_Shdr *symtab_hdr; | |
1884 | asection *srel; | |
6725bdbf | 1885 | |
0c715baa | 1886 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
161d71a6 | 1887 | continue; |
6725bdbf | 1888 | |
0c715baa AM |
1889 | for (s = ibfd->sections; s != NULL; s = s->next) |
1890 | { | |
ec338859 | 1891 | struct elf_i386_dyn_relocs *p; |
0c715baa | 1892 | |
e81d3500 DD |
1893 | for (p = ((struct elf_i386_dyn_relocs *) |
1894 | elf_section_data (s)->local_dynrel); | |
ec338859 AM |
1895 | p != NULL; |
1896 | p = p->next) | |
0c715baa | 1897 | { |
ec338859 AM |
1898 | if (!bfd_is_abs_section (p->sec) |
1899 | && bfd_is_abs_section (p->sec->output_section)) | |
1900 | { | |
1901 | /* Input section has been discarded, either because | |
1902 | it is a copy of a linkonce section or due to | |
1903 | linker script /DISCARD/, so we'll be discarding | |
1904 | the relocs too. */ | |
1905 | } | |
248866a8 | 1906 | else if (p->count != 0) |
ec338859 AM |
1907 | { |
1908 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1909 | srel->size += p->count * sizeof (Elf32_External_Rel); |
248866a8 AM |
1910 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1911 | info->flags |= DF_TEXTREL; | |
ec338859 | 1912 | } |
0c715baa AM |
1913 | } |
1914 | } | |
1915 | ||
1916 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
1917 | if (!local_got) |
1918 | continue; | |
6725bdbf | 1919 | |
0c715baa | 1920 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; |
161d71a6 L |
1921 | locsymcount = symtab_hdr->sh_info; |
1922 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 1923 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 1924 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
161d71a6 L |
1925 | s = htab->sgot; |
1926 | srel = htab->srelgot; | |
67a4f2b7 AO |
1927 | for (; local_got < end_local_got; |
1928 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 1929 | { |
67a4f2b7 | 1930 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 1931 | if (*local_got > 0) |
6725bdbf | 1932 | { |
67a4f2b7 AO |
1933 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
1934 | { | |
1935 | *local_tlsdesc_gotent = htab->sgotplt->size | |
1936 | - elf_i386_compute_jump_table_size (htab); | |
1937 | htab->sgotplt->size += 8; | |
1938 | *local_got = (bfd_vma) -2; | |
1939 | } | |
1940 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
1941 | || GOT_TLS_GD_P (*local_tls_type)) | |
1942 | { | |
1943 | *local_got = s->size; | |
1944 | s->size += 4; | |
1945 | if (GOT_TLS_GD_P (*local_tls_type) | |
1946 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
1947 | s->size += 4; | |
1948 | } | |
13ae64f3 | 1949 | if (info->shared |
67a4f2b7 | 1950 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
1951 | || (*local_tls_type & GOT_TLS_IE)) |
1952 | { | |
1953 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 1954 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
1955 | else if (GOT_TLS_GD_P (*local_tls_type) |
1956 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 1957 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
1958 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
1959 | htab->srelplt->size += sizeof (Elf32_External_Rel); | |
37e55690 | 1960 | } |
6725bdbf | 1961 | } |
161d71a6 L |
1962 | else |
1963 | *local_got = (bfd_vma) -1; | |
6725bdbf | 1964 | } |
252b5132 | 1965 | } |
6725bdbf | 1966 | |
13ae64f3 JJ |
1967 | if (htab->tls_ldm_got.refcount > 0) |
1968 | { | |
1969 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
1970 | relocs. */ | |
eea6121a AM |
1971 | htab->tls_ldm_got.offset = htab->sgot->size; |
1972 | htab->sgot->size += 8; | |
1973 | htab->srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
1974 | } |
1975 | else | |
1976 | htab->tls_ldm_got.offset = -1; | |
1977 | ||
0c715baa AM |
1978 | /* Allocate global sym .plt and .got entries, and space for global |
1979 | sym dynamic relocs. */ | |
ebe50bae | 1980 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); |
252b5132 | 1981 | |
67a4f2b7 AO |
1982 | /* For every jump slot reserved in the sgotplt, reloc_count is |
1983 | incremented. However, when we reserve space for TLS descriptors, | |
1984 | it's not incremented, so in order to compute the space reserved | |
1985 | for them, it suffices to multiply the reloc count by the jump | |
1986 | slot size. */ | |
1987 | if (htab->srelplt) | |
5ae0bfb6 | 1988 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; |
67a4f2b7 | 1989 | |
5a15f56f AM |
1990 | /* We now have determined the sizes of the various dynamic sections. |
1991 | Allocate memory for them. */ | |
b34976b6 | 1992 | relocs = FALSE; |
252b5132 RH |
1993 | for (s = dynobj->sections; s != NULL; s = s->next) |
1994 | { | |
eac338cf PB |
1995 | bfd_boolean strip_section = TRUE; |
1996 | ||
252b5132 RH |
1997 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
1998 | continue; | |
1999 | ||
6725bdbf AM |
2000 | if (s == htab->splt |
2001 | || s == htab->sgot | |
75ff4589 L |
2002 | || s == htab->sgotplt |
2003 | || s == htab->sdynbss) | |
252b5132 | 2004 | { |
6725bdbf AM |
2005 | /* Strip this section if we don't need it; see the |
2006 | comment below. */ | |
eac338cf PB |
2007 | /* We'd like to strip these sections if they aren't needed, but if |
2008 | we've exported dynamic symbols from them we must leave them. | |
2009 | It's too late to tell BFD to get rid of the symbols. */ | |
2010 | ||
7325306f | 2011 | if (htab->elf.hplt != NULL) |
eac338cf | 2012 | strip_section = FALSE; |
252b5132 | 2013 | } |
0112cd26 | 2014 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 2015 | { |
eac338cf | 2016 | if (s->size != 0 && s != htab->srelplt && s != htab->srelplt2) |
b34976b6 | 2017 | relocs = TRUE; |
252b5132 | 2018 | |
0ac8d2ca AM |
2019 | /* We use the reloc_count field as a counter if we need |
2020 | to copy relocs into the output file. */ | |
5ae0bfb6 | 2021 | s->reloc_count = 0; |
252b5132 | 2022 | } |
6725bdbf | 2023 | else |
252b5132 RH |
2024 | { |
2025 | /* It's not one of our sections, so don't allocate space. */ | |
2026 | continue; | |
2027 | } | |
2028 | ||
c456f082 | 2029 | if (s->size == 0) |
252b5132 | 2030 | { |
0ac8d2ca AM |
2031 | /* If we don't need this section, strip it from the |
2032 | output file. This is mostly to handle .rel.bss and | |
2033 | .rel.plt. We must create both sections in | |
2034 | create_dynamic_sections, because they must be created | |
2035 | before the linker maps input sections to output | |
2036 | sections. The linker does that before | |
2037 | adjust_dynamic_symbol is called, and it is that | |
2038 | function which decides whether anything needs to go | |
2039 | into these sections. */ | |
c456f082 AM |
2040 | if (strip_section) |
2041 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
2042 | continue; |
2043 | } | |
2044 | ||
c456f082 AM |
2045 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2046 | continue; | |
2047 | ||
f69da49f AM |
2048 | /* Allocate memory for the section contents. We use bfd_zalloc |
2049 | here in case unused entries are not reclaimed before the | |
2050 | section's contents are written out. This should not happen, | |
2051 | but this way if it does, we get a R_386_NONE reloc instead | |
2052 | of garbage. */ | |
eea6121a | 2053 | s->contents = bfd_zalloc (dynobj, s->size); |
6725bdbf | 2054 | if (s->contents == NULL) |
b34976b6 | 2055 | return FALSE; |
252b5132 RH |
2056 | } |
2057 | ||
ebe50bae | 2058 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2059 | { |
2060 | /* Add some entries to the .dynamic section. We fill in the | |
2061 | values later, in elf_i386_finish_dynamic_sections, but we | |
2062 | must add the entries now so that we get the correct size for | |
2063 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2064 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2065 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2066 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2067 | |
36af4a4e | 2068 | if (info->executable) |
252b5132 | 2069 | { |
dc810e39 | 2070 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2071 | return FALSE; |
252b5132 RH |
2072 | } |
2073 | ||
eea6121a | 2074 | if (htab->splt->size != 0) |
252b5132 | 2075 | { |
dc810e39 AM |
2076 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2077 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2078 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
2079 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2080 | return FALSE; |
252b5132 RH |
2081 | } |
2082 | ||
2083 | if (relocs) | |
2084 | { | |
dc810e39 AM |
2085 | if (!add_dynamic_entry (DT_REL, 0) |
2086 | || !add_dynamic_entry (DT_RELSZ, 0) | |
2087 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 2088 | return FALSE; |
252b5132 | 2089 | |
0c715baa AM |
2090 | /* If any dynamic relocs apply to a read-only section, |
2091 | then we need a DT_TEXTREL entry. */ | |
248866a8 AM |
2092 | if ((info->flags & DF_TEXTREL) == 0) |
2093 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
2094 | (PTR) info); | |
0c715baa AM |
2095 | |
2096 | if ((info->flags & DF_TEXTREL) != 0) | |
2097 | { | |
2098 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2099 | return FALSE; |
0c715baa | 2100 | } |
252b5132 RH |
2101 | } |
2102 | } | |
dc810e39 | 2103 | #undef add_dynamic_entry |
252b5132 | 2104 | |
b34976b6 | 2105 | return TRUE; |
252b5132 RH |
2106 | } |
2107 | ||
67a4f2b7 AO |
2108 | static bfd_boolean |
2109 | elf_i386_always_size_sections (bfd *output_bfd, | |
2110 | struct bfd_link_info *info) | |
2111 | { | |
2112 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
2113 | ||
2114 | if (tls_sec) | |
2115 | { | |
2116 | struct elf_link_hash_entry *tlsbase; | |
2117 | ||
2118 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
2119 | "_TLS_MODULE_BASE_", | |
2120 | FALSE, FALSE, FALSE); | |
2121 | ||
2122 | if (tlsbase && tlsbase->type == STT_TLS) | |
2123 | { | |
2124 | struct bfd_link_hash_entry *bh = NULL; | |
2125 | const struct elf_backend_data *bed | |
2126 | = get_elf_backend_data (output_bfd); | |
2127 | ||
2128 | if (!(_bfd_generic_link_add_one_symbol | |
2129 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2130 | tls_sec, 0, NULL, FALSE, | |
2131 | bed->collect, &bh))) | |
2132 | return FALSE; | |
2133 | tlsbase = (struct elf_link_hash_entry *)bh; | |
2134 | tlsbase->def_regular = 1; | |
2135 | tlsbase->other = STV_HIDDEN; | |
2136 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2137 | } | |
2138 | } | |
2139 | ||
2140 | return TRUE; | |
2141 | } | |
2142 | ||
38701953 AM |
2143 | /* Set the correct type for an x86 ELF section. We do this by the |
2144 | section name, which is a hack, but ought to work. */ | |
2145 | ||
b34976b6 | 2146 | static bfd_boolean |
55fd94b0 AM |
2147 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
2148 | Elf_Internal_Shdr *hdr, | |
2149 | asection *sec) | |
38701953 AM |
2150 | { |
2151 | register const char *name; | |
2152 | ||
2153 | name = bfd_get_section_name (abfd, sec); | |
2154 | ||
2155 | /* This is an ugly, but unfortunately necessary hack that is | |
2156 | needed when producing EFI binaries on x86. It tells | |
2157 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
2158 | containing ELF relocation info. We need this hack in order to | |
2159 | be able to generate ELF binaries that can be translated into | |
2160 | EFI applications (which are essentially COFF objects). Those | |
2161 | files contain a COFF ".reloc" section inside an ELFNN object, | |
2162 | which would normally cause BFD to segfault because it would | |
2163 | attempt to interpret this section as containing relocation | |
2164 | entries for section "oc". With this hack enabled, ".reloc" | |
2165 | will be treated as a normal data section, which will avoid the | |
2166 | segfault. However, you won't be able to create an ELFNN binary | |
2167 | with a section named "oc" that needs relocations, but that's | |
2168 | the kind of ugly side-effects you get when detecting section | |
2169 | types based on their names... In practice, this limitation is | |
2170 | unlikely to bite. */ | |
2171 | if (strcmp (name, ".reloc") == 0) | |
2172 | hdr->sh_type = SHT_PROGBITS; | |
2173 | ||
b34976b6 | 2174 | return TRUE; |
38701953 AM |
2175 | } |
2176 | ||
13ae64f3 JJ |
2177 | /* Return the base VMA address which should be subtracted from real addresses |
2178 | when resolving @dtpoff relocation. | |
2179 | This is PT_TLS segment p_vaddr. */ | |
2180 | ||
2181 | static bfd_vma | |
55fd94b0 | 2182 | dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 2183 | { |
e1918d23 AM |
2184 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2185 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 2186 | return 0; |
e1918d23 | 2187 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
2188 | } |
2189 | ||
2190 | /* Return the relocation value for @tpoff relocation | |
2191 | if STT_TLS virtual address is ADDRESS. */ | |
2192 | ||
2193 | static bfd_vma | |
55fd94b0 | 2194 | tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 2195 | { |
e1918d23 | 2196 | struct elf_link_hash_table *htab = elf_hash_table (info); |
13ae64f3 | 2197 | |
e1918d23 AM |
2198 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2199 | if (htab->tls_sec == NULL) | |
6a30718d | 2200 | return 0; |
e1918d23 | 2201 | return htab->tls_size + htab->tls_sec->vma - address; |
13ae64f3 JJ |
2202 | } |
2203 | ||
252b5132 RH |
2204 | /* Relocate an i386 ELF section. */ |
2205 | ||
b34976b6 | 2206 | static bfd_boolean |
55fd94b0 AM |
2207 | elf_i386_relocate_section (bfd *output_bfd, |
2208 | struct bfd_link_info *info, | |
2209 | bfd *input_bfd, | |
2210 | asection *input_section, | |
2211 | bfd_byte *contents, | |
2212 | Elf_Internal_Rela *relocs, | |
2213 | Elf_Internal_Sym *local_syms, | |
2214 | asection **local_sections) | |
252b5132 | 2215 | { |
6725bdbf | 2216 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
2217 | Elf_Internal_Shdr *symtab_hdr; |
2218 | struct elf_link_hash_entry **sym_hashes; | |
2219 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2220 | bfd_vma *local_tlsdesc_gotents; |
252b5132 RH |
2221 | Elf_Internal_Rela *rel; |
2222 | Elf_Internal_Rela *relend; | |
2223 | ||
6725bdbf | 2224 | htab = elf_i386_hash_table (info); |
252b5132 RH |
2225 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2226 | sym_hashes = elf_sym_hashes (input_bfd); | |
2227 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 2228 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
252b5132 | 2229 | |
252b5132 RH |
2230 | rel = relocs; |
2231 | relend = relocs + input_section->reloc_count; | |
2232 | for (; rel < relend; rel++) | |
2233 | { | |
13ae64f3 | 2234 | unsigned int r_type; |
252b5132 RH |
2235 | reloc_howto_type *howto; |
2236 | unsigned long r_symndx; | |
2237 | struct elf_link_hash_entry *h; | |
2238 | Elf_Internal_Sym *sym; | |
2239 | asection *sec; | |
67a4f2b7 | 2240 | bfd_vma off, offplt; |
252b5132 | 2241 | bfd_vma relocation; |
b34976b6 | 2242 | bfd_boolean unresolved_reloc; |
252b5132 | 2243 | bfd_reloc_status_type r; |
1b452ec6 | 2244 | unsigned int indx; |
13ae64f3 | 2245 | int tls_type; |
252b5132 RH |
2246 | |
2247 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
2248 | if (r_type == R_386_GNU_VTINHERIT |
2249 | || r_type == R_386_GNU_VTENTRY) | |
252b5132 | 2250 | continue; |
dc47f327 | 2251 | |
55fd94b0 | 2252 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
2253 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
2254 | >= R_386_ext - R_386_standard) | |
2255 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
2256 | >= R_386_tls - R_386_ext)) | |
252b5132 | 2257 | { |
6ba842b6 | 2258 | (*_bfd_error_handler) |
d003868e AM |
2259 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
2260 | input_bfd, input_section, r_type); | |
252b5132 | 2261 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 2262 | return FALSE; |
252b5132 | 2263 | } |
1b452ec6 | 2264 | howto = elf_howto_table + indx; |
252b5132 RH |
2265 | |
2266 | r_symndx = ELF32_R_SYM (rel->r_info); | |
2267 | ||
1049f94e | 2268 | if (info->relocatable) |
252b5132 | 2269 | { |
4a335f3d | 2270 | bfd_vma val; |
4a335f3d AM |
2271 | bfd_byte *where; |
2272 | ||
0ac8d2ca | 2273 | /* This is a relocatable link. We don't have to change |
252b5132 RH |
2274 | anything, unless the reloc is against a section symbol, |
2275 | in which case we have to adjust according to where the | |
2276 | section symbol winds up in the output section. */ | |
4a335f3d AM |
2277 | if (r_symndx >= symtab_hdr->sh_info) |
2278 | continue; | |
2279 | ||
2280 | sym = local_syms + r_symndx; | |
2281 | if (ELF_ST_TYPE (sym->st_info) != STT_SECTION) | |
2282 | continue; | |
2283 | ||
2284 | sec = local_sections[r_symndx]; | |
2285 | val = sec->output_offset; | |
2286 | if (val == 0) | |
2287 | continue; | |
2288 | ||
2289 | where = contents + rel->r_offset; | |
2290 | switch (howto->size) | |
252b5132 | 2291 | { |
16a10388 | 2292 | /* FIXME: overflow checks. */ |
4a335f3d | 2293 | case 0: |
16a10388 | 2294 | val += bfd_get_8 (input_bfd, where); |
4a335f3d | 2295 | bfd_put_8 (input_bfd, val, where); |
4a335f3d AM |
2296 | break; |
2297 | case 1: | |
16a10388 | 2298 | val += bfd_get_16 (input_bfd, where); |
4a335f3d | 2299 | bfd_put_16 (input_bfd, val, where); |
4a335f3d AM |
2300 | break; |
2301 | case 2: | |
2302 | val += bfd_get_32 (input_bfd, where); | |
2303 | bfd_put_32 (input_bfd, val, where); | |
2304 | break; | |
2305 | default: | |
2306 | abort (); | |
252b5132 | 2307 | } |
252b5132 RH |
2308 | continue; |
2309 | } | |
2310 | ||
2311 | /* This is a final link. */ | |
2312 | h = NULL; | |
2313 | sym = NULL; | |
2314 | sec = NULL; | |
b34976b6 | 2315 | unresolved_reloc = FALSE; |
252b5132 RH |
2316 | if (r_symndx < symtab_hdr->sh_info) |
2317 | { | |
2318 | sym = local_syms + r_symndx; | |
2319 | sec = local_sections[r_symndx]; | |
2320 | relocation = (sec->output_section->vma | |
2321 | + sec->output_offset | |
2322 | + sym->st_value); | |
f8df10f4 JJ |
2323 | if ((sec->flags & SEC_MERGE) |
2324 | && ELF_ST_TYPE (sym->st_info) == STT_SECTION) | |
2325 | { | |
2326 | asection *msec; | |
2327 | bfd_vma addend; | |
4a335f3d | 2328 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 2329 | |
4a335f3d | 2330 | switch (howto->size) |
f8df10f4 | 2331 | { |
4a335f3d AM |
2332 | case 0: |
2333 | addend = bfd_get_8 (input_bfd, where); | |
2334 | if (howto->pc_relative) | |
2335 | { | |
2336 | addend = (addend ^ 0x80) - 0x80; | |
2337 | addend += 1; | |
2338 | } | |
2339 | break; | |
2340 | case 1: | |
2341 | addend = bfd_get_16 (input_bfd, where); | |
2342 | if (howto->pc_relative) | |
2343 | { | |
2344 | addend = (addend ^ 0x8000) - 0x8000; | |
2345 | addend += 2; | |
2346 | } | |
2347 | break; | |
2348 | case 2: | |
2349 | addend = bfd_get_32 (input_bfd, where); | |
2350 | if (howto->pc_relative) | |
2351 | { | |
2352 | addend = (addend ^ 0x80000000) - 0x80000000; | |
2353 | addend += 4; | |
2354 | } | |
2355 | break; | |
2356 | default: | |
2357 | abort (); | |
f8df10f4 JJ |
2358 | } |
2359 | ||
f8df10f4 | 2360 | msec = sec; |
4a335f3d AM |
2361 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, addend); |
2362 | addend -= relocation; | |
f8df10f4 | 2363 | addend += msec->output_section->vma + msec->output_offset; |
4a335f3d AM |
2364 | |
2365 | switch (howto->size) | |
2366 | { | |
2367 | case 0: | |
16a10388 | 2368 | /* FIXME: overflow checks. */ |
4a335f3d AM |
2369 | if (howto->pc_relative) |
2370 | addend -= 1; | |
2371 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
2372 | break; |
2373 | case 1: | |
2374 | if (howto->pc_relative) | |
2375 | addend -= 2; | |
2376 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
2377 | break; |
2378 | case 2: | |
2379 | if (howto->pc_relative) | |
2380 | addend -= 4; | |
2381 | bfd_put_32 (input_bfd, addend, where); | |
2382 | break; | |
2383 | } | |
f8df10f4 | 2384 | } |
252b5132 RH |
2385 | } |
2386 | else | |
2387 | { | |
560e09e9 | 2388 | bfd_boolean warned; |
ffb2e45b | 2389 | |
b2a8e766 AM |
2390 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2391 | r_symndx, symtab_hdr, sym_hashes, | |
2392 | h, sec, relocation, | |
2393 | unresolved_reloc, warned); | |
252b5132 RH |
2394 | } |
2395 | ||
9635fe29 AM |
2396 | if (r_symndx == 0) |
2397 | { | |
b1e24c02 DJ |
2398 | /* r_symndx will be zero only for relocs against symbols from |
2399 | removed linkonce sections, or sections discarded by a linker | |
2400 | script. For these relocs, we just want the section contents | |
2401 | zeroed. Avoid any special processing. */ | |
2402 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2403 | continue; | |
9635fe29 AM |
2404 | } |
2405 | ||
252b5132 RH |
2406 | switch (r_type) |
2407 | { | |
2408 | case R_386_GOT32: | |
2409 | /* Relocation is to the entry for this symbol in the global | |
2410 | offset table. */ | |
ffb2e45b AM |
2411 | if (htab->sgot == NULL) |
2412 | abort (); | |
252b5132 RH |
2413 | |
2414 | if (h != NULL) | |
2415 | { | |
b34976b6 | 2416 | bfd_boolean dyn; |
252b5132 RH |
2417 | |
2418 | off = h->got.offset; | |
ebe50bae | 2419 | dyn = htab->elf.dynamic_sections_created; |
26e41594 | 2420 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
252b5132 | 2421 | || (info->shared |
586119b3 | 2422 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
2423 | || (ELF_ST_VISIBILITY (h->other) |
2424 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2425 | { |
2426 | /* This is actually a static link, or it is a | |
2427 | -Bsymbolic link and the symbol is defined | |
2428 | locally, or the symbol was forced to be local | |
2429 | because of a version file. We must initialize | |
2430 | this entry in the global offset table. Since the | |
2431 | offset must always be a multiple of 4, we use the | |
2432 | least significant bit to record whether we have | |
2433 | initialized it already. | |
2434 | ||
2435 | When doing a dynamic link, we create a .rel.got | |
2436 | relocation entry to initialize the value. This | |
2437 | is done in the finish_dynamic_symbol routine. */ | |
2438 | if ((off & 1) != 0) | |
2439 | off &= ~1; | |
2440 | else | |
2441 | { | |
2442 | bfd_put_32 (output_bfd, relocation, | |
6725bdbf | 2443 | htab->sgot->contents + off); |
252b5132 RH |
2444 | h->got.offset |= 1; |
2445 | } | |
2446 | } | |
8c694914 | 2447 | else |
b34976b6 | 2448 | unresolved_reloc = FALSE; |
252b5132 RH |
2449 | } |
2450 | else | |
2451 | { | |
ffb2e45b AM |
2452 | if (local_got_offsets == NULL) |
2453 | abort (); | |
252b5132 RH |
2454 | |
2455 | off = local_got_offsets[r_symndx]; | |
2456 | ||
2457 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
2458 | the least significant bit to record whether we have |
2459 | already generated the necessary reloc. */ | |
252b5132 RH |
2460 | if ((off & 1) != 0) |
2461 | off &= ~1; | |
2462 | else | |
2463 | { | |
6725bdbf AM |
2464 | bfd_put_32 (output_bfd, relocation, |
2465 | htab->sgot->contents + off); | |
252b5132 RH |
2466 | |
2467 | if (info->shared) | |
2468 | { | |
947216bf AM |
2469 | asection *s; |
2470 | Elf_Internal_Rela outrel; | |
2471 | bfd_byte *loc; | |
252b5132 | 2472 | |
947216bf AM |
2473 | s = htab->srelgot; |
2474 | if (s == NULL) | |
ffb2e45b | 2475 | abort (); |
252b5132 | 2476 | |
6725bdbf AM |
2477 | outrel.r_offset = (htab->sgot->output_section->vma |
2478 | + htab->sgot->output_offset | |
252b5132 RH |
2479 | + off); |
2480 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
947216bf AM |
2481 | loc = s->contents; |
2482 | loc += s->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 2483 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
2484 | } |
2485 | ||
2486 | local_got_offsets[r_symndx] |= 1; | |
2487 | } | |
252b5132 RH |
2488 | } |
2489 | ||
ffb2e45b AM |
2490 | if (off >= (bfd_vma) -2) |
2491 | abort (); | |
2492 | ||
8c37241b JJ |
2493 | relocation = htab->sgot->output_section->vma |
2494 | + htab->sgot->output_offset + off | |
2495 | - htab->sgotplt->output_section->vma | |
2496 | - htab->sgotplt->output_offset; | |
252b5132 RH |
2497 | break; |
2498 | ||
2499 | case R_386_GOTOFF: | |
2500 | /* Relocation is relative to the start of the global offset | |
2501 | table. */ | |
2502 | ||
90f487df L |
2503 | /* Check to make sure it isn't a protected function symbol |
2504 | for shared library since it may not be local when used | |
2505 | as function address. */ | |
2506 | if (info->shared | |
8fe76924 | 2507 | && !info->executable |
90f487df L |
2508 | && h |
2509 | && h->def_regular | |
2510 | && h->type == STT_FUNC | |
2511 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2512 | { | |
2513 | (*_bfd_error_handler) | |
2514 | (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"), | |
2515 | input_bfd, h->root.root.string); | |
2516 | bfd_set_error (bfd_error_bad_value); | |
2517 | return FALSE; | |
2518 | } | |
2519 | ||
8c37241b JJ |
2520 | /* Note that sgot is not involved in this |
2521 | calculation. We always want the start of .got.plt. If we | |
2522 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
2523 | permitted by the ABI, we might have to change this |
2524 | calculation. */ | |
8c37241b JJ |
2525 | relocation -= htab->sgotplt->output_section->vma |
2526 | + htab->sgotplt->output_offset; | |
252b5132 RH |
2527 | break; |
2528 | ||
2529 | case R_386_GOTPC: | |
2530 | /* Use global offset table as symbol value. */ | |
8c37241b JJ |
2531 | relocation = htab->sgotplt->output_section->vma |
2532 | + htab->sgotplt->output_offset; | |
b34976b6 | 2533 | unresolved_reloc = FALSE; |
252b5132 RH |
2534 | break; |
2535 | ||
2536 | case R_386_PLT32: | |
2537 | /* Relocation is to the entry for this symbol in the | |
2538 | procedure linkage table. */ | |
2539 | ||
dd5724d5 | 2540 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 2541 | without using the procedure linkage table. */ |
252b5132 RH |
2542 | if (h == NULL) |
2543 | break; | |
2544 | ||
dd5724d5 | 2545 | if (h->plt.offset == (bfd_vma) -1 |
6725bdbf | 2546 | || htab->splt == NULL) |
252b5132 RH |
2547 | { |
2548 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
2549 | happens when statically linking PIC code, or when |
2550 | using -Bsymbolic. */ | |
252b5132 RH |
2551 | break; |
2552 | } | |
2553 | ||
6725bdbf AM |
2554 | relocation = (htab->splt->output_section->vma |
2555 | + htab->splt->output_offset | |
252b5132 | 2556 | + h->plt.offset); |
b34976b6 | 2557 | unresolved_reloc = FALSE; |
252b5132 RH |
2558 | break; |
2559 | ||
2560 | case R_386_32: | |
2561 | case R_386_PC32: | |
f855931b | 2562 | if ((input_section->flags & SEC_ALLOC) == 0) |
ec338859 AM |
2563 | break; |
2564 | ||
12d0ee4a | 2565 | if ((info->shared |
ef5aade5 L |
2566 | && (h == NULL |
2567 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2568 | || h->root.type != bfd_link_hash_undefweak) | |
12d0ee4a | 2569 | && (r_type != R_386_PC32 |
f6c52c13 | 2570 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 AM |
2571 | || (ELIMINATE_COPY_RELOCS |
2572 | && !info->shared | |
12d0ee4a AM |
2573 | && h != NULL |
2574 | && h->dynindx != -1 | |
f5385ebf AM |
2575 | && !h->non_got_ref |
2576 | && ((h->def_dynamic | |
2577 | && !h->def_regular) | |
28d0b90e AM |
2578 | || h->root.type == bfd_link_hash_undefweak |
2579 | || h->root.type == bfd_link_hash_undefined))) | |
252b5132 | 2580 | { |
947216bf AM |
2581 | Elf_Internal_Rela outrel; |
2582 | bfd_byte *loc; | |
b34976b6 | 2583 | bfd_boolean skip, relocate; |
0c715baa | 2584 | asection *sreloc; |
252b5132 RH |
2585 | |
2586 | /* When generating a shared object, these relocations | |
2587 | are copied into the output file to be resolved at run | |
2588 | time. */ | |
2589 | ||
b34976b6 AM |
2590 | skip = FALSE; |
2591 | relocate = FALSE; | |
252b5132 | 2592 | |
c629eae0 JJ |
2593 | outrel.r_offset = |
2594 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
2595 | rel->r_offset); | |
2596 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 2597 | skip = TRUE; |
0bb2d96a | 2598 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2599 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
2600 | outrel.r_offset += (input_section->output_section->vma |
2601 | + input_section->output_offset); | |
2602 | ||
2603 | if (skip) | |
0bb2d96a | 2604 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
2605 | else if (h != NULL |
2606 | && h->dynindx != -1 | |
2607 | && (r_type == R_386_PC32 | |
2608 | || !info->shared | |
55255dae | 2609 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 2610 | || !h->def_regular)) |
0bb2d96a | 2611 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
2612 | else |
2613 | { | |
5a15f56f | 2614 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 2615 | relocate = TRUE; |
5a15f56f | 2616 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
2617 | } |
2618 | ||
0c715baa AM |
2619 | sreloc = elf_section_data (input_section)->sreloc; |
2620 | if (sreloc == NULL) | |
2621 | abort (); | |
2622 | ||
947216bf AM |
2623 | loc = sreloc->contents; |
2624 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
0c715baa | 2625 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
2626 | |
2627 | /* If this reloc is against an external symbol, we do | |
2628 | not want to fiddle with the addend. Otherwise, we | |
2629 | need to include the symbol value so that it becomes | |
2630 | an addend for the dynamic reloc. */ | |
2631 | if (! relocate) | |
2632 | continue; | |
2633 | } | |
252b5132 RH |
2634 | break; |
2635 | ||
37e55690 JJ |
2636 | case R_386_TLS_IE: |
2637 | if (info->shared) | |
2638 | { | |
947216bf AM |
2639 | Elf_Internal_Rela outrel; |
2640 | bfd_byte *loc; | |
37e55690 | 2641 | asection *sreloc; |
37e55690 JJ |
2642 | |
2643 | outrel.r_offset = rel->r_offset | |
2644 | + input_section->output_section->vma | |
2645 | + input_section->output_offset; | |
2646 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
2647 | sreloc = elf_section_data (input_section)->sreloc; | |
2648 | if (sreloc == NULL) | |
2649 | abort (); | |
947216bf AM |
2650 | loc = sreloc->contents; |
2651 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
37e55690 JJ |
2652 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
2653 | } | |
2654 | /* Fall through */ | |
2655 | ||
13ae64f3 | 2656 | case R_386_TLS_GD: |
67a4f2b7 AO |
2657 | case R_386_TLS_GOTDESC: |
2658 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 2659 | case R_386_TLS_IE_32: |
37e55690 | 2660 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
2661 | r_type = elf_i386_tls_transition (info, r_type, h == NULL); |
2662 | tls_type = GOT_UNKNOWN; | |
2663 | if (h == NULL && local_got_offsets) | |
2664 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
2665 | else if (h != NULL) | |
2666 | { | |
2667 | tls_type = elf_i386_hash_entry(h)->tls_type; | |
37e55690 | 2668 | if (!info->shared && h->dynindx == -1 && (tls_type & GOT_TLS_IE)) |
13ae64f3 JJ |
2669 | r_type = R_386_TLS_LE_32; |
2670 | } | |
37e55690 JJ |
2671 | if (tls_type == GOT_TLS_IE) |
2672 | tls_type = GOT_TLS_IE_NEG; | |
67a4f2b7 AO |
2673 | if (r_type == R_386_TLS_GD |
2674 | || r_type == R_386_TLS_GOTDESC | |
2675 | || r_type == R_386_TLS_DESC_CALL) | |
37e55690 JJ |
2676 | { |
2677 | if (tls_type == GOT_TLS_IE_POS) | |
2678 | r_type = R_386_TLS_GOTIE; | |
2679 | else if (tls_type & GOT_TLS_IE) | |
2680 | r_type = R_386_TLS_IE_32; | |
2681 | } | |
13ae64f3 JJ |
2682 | |
2683 | if (r_type == R_386_TLS_LE_32) | |
2684 | { | |
82e51918 | 2685 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
2686 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
2687 | { | |
2688 | unsigned int val, type; | |
2689 | bfd_vma roff; | |
2690 | ||
2691 | /* GD->LE transition. */ | |
2692 | BFD_ASSERT (rel->r_offset >= 2); | |
2693 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2694 | BFD_ASSERT (type == 0x8d || type == 0x04); | |
eea6121a | 2695 | BFD_ASSERT (rel->r_offset + 9 <= input_section->size); |
13ae64f3 JJ |
2696 | BFD_ASSERT (bfd_get_8 (input_bfd, |
2697 | contents + rel->r_offset + 4) | |
2698 | == 0xe8); | |
2699 | BFD_ASSERT (rel + 1 < relend); | |
2700 | BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
2701 | roff = rel->r_offset + 5; | |
2702 | val = bfd_get_8 (input_bfd, | |
2703 | contents + rel->r_offset - 1); | |
2704 | if (type == 0x04) | |
2705 | { | |
2706 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
2707 | Change it into: | |
2708 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
2709 | (6 byte form of subl). */ | |
2710 | BFD_ASSERT (rel->r_offset >= 3); | |
2711 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2712 | contents + rel->r_offset - 3) | |
2713 | == 0x8d); | |
2714 | BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3)); | |
2715 | memcpy (contents + rel->r_offset - 3, | |
2716 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
2717 | } | |
2718 | else | |
2719 | { | |
2720 | BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4); | |
eea6121a | 2721 | if (rel->r_offset + 10 <= input_section->size |
13ae64f3 JJ |
2722 | && bfd_get_8 (input_bfd, |
2723 | contents + rel->r_offset + 9) == 0x90) | |
2724 | { | |
2725 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
2726 | Change it into: | |
2727 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
2728 | (6 byte form of subl). */ | |
2729 | memcpy (contents + rel->r_offset - 2, | |
2730 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
2731 | roff = rel->r_offset + 6; | |
2732 | } | |
2733 | else | |
2734 | { | |
2735 | /* leal foo(%reg), %eax; call ___tls_get_addr | |
2736 | Change it into: | |
2737 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
2738 | (5 byte form of subl). */ | |
2739 | memcpy (contents + rel->r_offset - 2, | |
2740 | "\x65\xa1\0\0\0\0\x2d\0\0\0", 11); | |
2741 | } | |
2742 | } | |
2743 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2744 | contents + roff); | |
2745 | /* Skip R_386_PLT32. */ | |
2746 | rel++; | |
2747 | continue; | |
2748 | } | |
67a4f2b7 AO |
2749 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
2750 | { | |
2751 | /* GDesc -> LE transition. | |
2752 | It's originally something like: | |
2753 | leal x@tlsdesc(%ebx), %eax | |
2754 | ||
2755 | leal x@ntpoff, %eax | |
2756 | ||
2757 | Registers other than %eax may be set up here. */ | |
2758 | ||
2759 | unsigned int val, type; | |
2760 | bfd_vma roff; | |
2761 | ||
2762 | /* First, make sure it's a leal adding ebx to a | |
2763 | 32-bit offset into any register, although it's | |
2764 | probably almost always going to be eax. */ | |
2765 | roff = rel->r_offset; | |
2766 | BFD_ASSERT (roff >= 2); | |
2767 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
2768 | BFD_ASSERT (type == 0x8d); | |
2769 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
2770 | BFD_ASSERT ((val & 0xc7) == 0x83); | |
2771 | BFD_ASSERT (roff + 4 <= input_section->size); | |
2772 | ||
2773 | /* Now modify the instruction as appropriate. */ | |
2774 | /* aoliva FIXME: remove the above and xor the byte | |
2775 | below with 0x86. */ | |
2776 | bfd_put_8 (output_bfd, val ^ 0x86, | |
2777 | contents + roff - 1); | |
2778 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2779 | contents + roff); | |
2780 | continue; | |
2781 | } | |
2782 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
2783 | { | |
2784 | /* GDesc -> LE transition. | |
2785 | It's originally: | |
2786 | call *(%eax) | |
2787 | Turn it into: | |
2788 | nop; nop */ | |
2789 | ||
2790 | unsigned int val, type; | |
2791 | bfd_vma roff; | |
2792 | ||
2793 | /* First, make sure it's a call *(%eax). */ | |
2794 | roff = rel->r_offset; | |
2795 | BFD_ASSERT (roff + 2 <= input_section->size); | |
2796 | type = bfd_get_8 (input_bfd, contents + roff); | |
2797 | BFD_ASSERT (type == 0xff); | |
2798 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
2799 | BFD_ASSERT (val == 0x10); | |
2800 | ||
10efb593 L |
2801 | /* Now modify the instruction as appropriate. Use |
2802 | xchg %ax,%ax instead of 2 nops. */ | |
2803 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
2804 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2805 | continue; | |
2806 | } | |
37e55690 | 2807 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 JJ |
2808 | { |
2809 | unsigned int val, type; | |
2810 | ||
2811 | /* IE->LE transition: | |
37e55690 JJ |
2812 | Originally it can be one of: |
2813 | movl foo, %eax | |
2814 | movl foo, %reg | |
2815 | addl foo, %reg | |
2816 | We change it into: | |
2817 | movl $foo, %eax | |
2818 | movl $foo, %reg | |
2819 | addl $foo, %reg. */ | |
2820 | BFD_ASSERT (rel->r_offset >= 1); | |
2821 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
eea6121a | 2822 | BFD_ASSERT (rel->r_offset + 4 <= input_section->size); |
37e55690 JJ |
2823 | if (val == 0xa1) |
2824 | { | |
2825 | /* movl foo, %eax. */ | |
55fd94b0 AM |
2826 | bfd_put_8 (output_bfd, 0xb8, |
2827 | contents + rel->r_offset - 1); | |
37e55690 | 2828 | } |
299bf759 | 2829 | else |
37e55690 | 2830 | { |
299bf759 | 2831 | BFD_ASSERT (rel->r_offset >= 2); |
55fd94b0 AM |
2832 | type = bfd_get_8 (input_bfd, |
2833 | contents + rel->r_offset - 2); | |
299bf759 | 2834 | switch (type) |
26e41594 | 2835 | { |
299bf759 L |
2836 | case 0x8b: |
2837 | /* movl */ | |
2838 | BFD_ASSERT ((val & 0xc7) == 0x05); | |
2839 | bfd_put_8 (output_bfd, 0xc7, | |
2840 | contents + rel->r_offset - 2); | |
2841 | bfd_put_8 (output_bfd, | |
2842 | 0xc0 | ((val >> 3) & 7), | |
2843 | contents + rel->r_offset - 1); | |
2844 | break; | |
2845 | case 0x03: | |
2846 | /* addl */ | |
2847 | BFD_ASSERT ((val & 0xc7) == 0x05); | |
2848 | bfd_put_8 (output_bfd, 0x81, | |
2849 | contents + rel->r_offset - 2); | |
2850 | bfd_put_8 (output_bfd, | |
2851 | 0xc0 | ((val >> 3) & 7), | |
2852 | contents + rel->r_offset - 1); | |
2853 | break; | |
2854 | default: | |
2855 | BFD_FAIL (); | |
2856 | break; | |
26e41594 | 2857 | } |
37e55690 | 2858 | } |
37e55690 JJ |
2859 | bfd_put_32 (output_bfd, -tpoff (info, relocation), |
2860 | contents + rel->r_offset); | |
2861 | continue; | |
2862 | } | |
2863 | else | |
2864 | { | |
2865 | unsigned int val, type; | |
2866 | ||
2867 | /* {IE_32,GOTIE}->LE transition: | |
2868 | Originally it can be one of: | |
13ae64f3 | 2869 | subl foo(%reg1), %reg2 |
13ae64f3 | 2870 | movl foo(%reg1), %reg2 |
37e55690 | 2871 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
2872 | We change it into: |
2873 | subl $foo, %reg2 | |
37e55690 JJ |
2874 | movl $foo, %reg2 (6 byte form) |
2875 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
2876 | BFD_ASSERT (rel->r_offset >= 2); |
2877 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2878 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
eea6121a | 2879 | BFD_ASSERT (rel->r_offset + 4 <= input_section->size); |
37e55690 | 2880 | BFD_ASSERT ((val & 0xc0) == 0x80 && (val & 7) != 4); |
13ae64f3 JJ |
2881 | if (type == 0x8b) |
2882 | { | |
2883 | /* movl */ | |
13ae64f3 JJ |
2884 | bfd_put_8 (output_bfd, 0xc7, |
2885 | contents + rel->r_offset - 2); | |
2886 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2887 | contents + rel->r_offset - 1); | |
2888 | } | |
2889 | else if (type == 0x2b) | |
2890 | { | |
2891 | /* subl */ | |
13ae64f3 JJ |
2892 | bfd_put_8 (output_bfd, 0x81, |
2893 | contents + rel->r_offset - 2); | |
2894 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
2895 | contents + rel->r_offset - 1); | |
2896 | } | |
37e55690 JJ |
2897 | else if (type == 0x03) |
2898 | { | |
2899 | /* addl */ | |
2900 | bfd_put_8 (output_bfd, 0x81, | |
2901 | contents + rel->r_offset - 2); | |
2902 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2903 | contents + rel->r_offset - 1); | |
2904 | } | |
13ae64f3 JJ |
2905 | else |
2906 | BFD_FAIL (); | |
37e55690 JJ |
2907 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
2908 | bfd_put_32 (output_bfd, -tpoff (info, relocation), | |
2909 | contents + rel->r_offset); | |
2910 | else | |
2911 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2912 | contents + rel->r_offset); | |
13ae64f3 JJ |
2913 | continue; |
2914 | } | |
2915 | } | |
2916 | ||
2917 | if (htab->sgot == NULL) | |
2918 | abort (); | |
2919 | ||
2920 | if (h != NULL) | |
67a4f2b7 AO |
2921 | { |
2922 | off = h->got.offset; | |
2923 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
2924 | } | |
13ae64f3 JJ |
2925 | else |
2926 | { | |
2927 | if (local_got_offsets == NULL) | |
2928 | abort (); | |
2929 | ||
2930 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 2931 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
2932 | } |
2933 | ||
2934 | if ((off & 1) != 0) | |
2935 | off &= ~1; | |
26e41594 | 2936 | else |
13ae64f3 | 2937 | { |
947216bf AM |
2938 | Elf_Internal_Rela outrel; |
2939 | bfd_byte *loc; | |
13ae64f3 | 2940 | int dr_type, indx; |
67a4f2b7 | 2941 | asection *sreloc; |
13ae64f3 JJ |
2942 | |
2943 | if (htab->srelgot == NULL) | |
2944 | abort (); | |
2945 | ||
67a4f2b7 AO |
2946 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
2947 | ||
2948 | if (GOT_TLS_GDESC_P (tls_type)) | |
2949 | { | |
2950 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); | |
2951 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
2952 | <= htab->sgotplt->size); | |
2953 | outrel.r_offset = (htab->sgotplt->output_section->vma | |
2954 | + htab->sgotplt->output_offset | |
2955 | + offplt | |
2956 | + htab->sgotplt_jump_table_size); | |
2957 | sreloc = htab->srelplt; | |
2958 | loc = sreloc->contents; | |
5ae0bfb6 RS |
2959 | loc += (htab->next_tls_desc_index++ |
2960 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 AO |
2961 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
2962 | <= sreloc->contents + sreloc->size); | |
2963 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
2964 | if (indx == 0) | |
2965 | { | |
2966 | BFD_ASSERT (! unresolved_reloc); | |
2967 | bfd_put_32 (output_bfd, | |
2968 | relocation - dtpoff_base (info), | |
2969 | htab->sgotplt->contents + offplt | |
2970 | + htab->sgotplt_jump_table_size + 4); | |
2971 | } | |
2972 | else | |
2973 | { | |
2974 | bfd_put_32 (output_bfd, 0, | |
2975 | htab->sgotplt->contents + offplt | |
2976 | + htab->sgotplt_jump_table_size + 4); | |
2977 | } | |
2978 | } | |
2979 | ||
2980 | sreloc = htab->srelgot; | |
2981 | ||
13ae64f3 JJ |
2982 | outrel.r_offset = (htab->sgot->output_section->vma |
2983 | + htab->sgot->output_offset + off); | |
2984 | ||
67a4f2b7 | 2985 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 2986 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
2987 | else if (GOT_TLS_GDESC_P (tls_type)) |
2988 | goto dr_done; | |
37e55690 JJ |
2989 | else if (tls_type == GOT_TLS_IE_POS) |
2990 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
2991 | else |
2992 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 2993 | |
37e55690 JJ |
2994 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
2995 | bfd_put_32 (output_bfd, relocation - dtpoff_base (info), | |
2996 | htab->sgot->contents + off); | |
2997 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) | |
c5c1f40c | 2998 | bfd_put_32 (output_bfd, dtpoff_base (info) - relocation, |
c366c25e | 2999 | htab->sgot->contents + off); |
67a4f2b7 | 3000 | else if (dr_type != R_386_TLS_DESC) |
c366c25e JJ |
3001 | bfd_put_32 (output_bfd, 0, |
3002 | htab->sgot->contents + off); | |
13ae64f3 | 3003 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 AO |
3004 | |
3005 | loc = sreloc->contents; | |
3006 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
3007 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) | |
3008 | <= sreloc->contents + sreloc->size); | |
13ae64f3 JJ |
3009 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3010 | ||
67a4f2b7 | 3011 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
3012 | { |
3013 | if (indx == 0) | |
3014 | { | |
82e51918 | 3015 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
3016 | bfd_put_32 (output_bfd, |
3017 | relocation - dtpoff_base (info), | |
3018 | htab->sgot->contents + off + 4); | |
3019 | } | |
3020 | else | |
3021 | { | |
3022 | bfd_put_32 (output_bfd, 0, | |
3023 | htab->sgot->contents + off + 4); | |
3024 | outrel.r_info = ELF32_R_INFO (indx, | |
3025 | R_386_TLS_DTPOFF32); | |
3026 | outrel.r_offset += 4; | |
67a4f2b7 | 3027 | sreloc->reloc_count++; |
947216bf | 3028 | loc += sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
3029 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
3030 | <= sreloc->contents + sreloc->size); | |
947216bf | 3031 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
13ae64f3 JJ |
3032 | } |
3033 | } | |
37e55690 JJ |
3034 | else if (tls_type == GOT_TLS_IE_BOTH) |
3035 | { | |
3036 | bfd_put_32 (output_bfd, | |
3037 | indx == 0 ? relocation - dtpoff_base (info) : 0, | |
3038 | htab->sgot->contents + off + 4); | |
3039 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
3040 | outrel.r_offset += 4; | |
67a4f2b7 | 3041 | sreloc->reloc_count++; |
947216bf | 3042 | loc += sizeof (Elf32_External_Rel); |
37e55690 JJ |
3043 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3044 | } | |
13ae64f3 | 3045 | |
67a4f2b7 | 3046 | dr_done: |
13ae64f3 JJ |
3047 | if (h != NULL) |
3048 | h->got.offset |= 1; | |
3049 | else | |
3050 | local_got_offsets[r_symndx] |= 1; | |
3051 | } | |
3052 | ||
67a4f2b7 AO |
3053 | if (off >= (bfd_vma) -2 |
3054 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 3055 | abort (); |
67a4f2b7 AO |
3056 | if (r_type == R_386_TLS_GOTDESC |
3057 | || r_type == R_386_TLS_DESC_CALL) | |
3058 | { | |
3059 | relocation = htab->sgotplt_jump_table_size + offplt; | |
3060 | unresolved_reloc = FALSE; | |
3061 | } | |
3062 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 3063 | { |
8c37241b JJ |
3064 | bfd_vma g_o_t = htab->sgotplt->output_section->vma |
3065 | + htab->sgotplt->output_offset; | |
3066 | relocation = htab->sgot->output_section->vma | |
67a4f2b7 | 3067 | + htab->sgot->output_offset + off - g_o_t; |
37e55690 JJ |
3068 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
3069 | && tls_type == GOT_TLS_IE_BOTH) | |
3070 | relocation += 4; | |
3071 | if (r_type == R_386_TLS_IE) | |
8c37241b | 3072 | relocation += g_o_t; |
b34976b6 | 3073 | unresolved_reloc = FALSE; |
13ae64f3 | 3074 | } |
67a4f2b7 | 3075 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
3076 | { |
3077 | unsigned int val, type; | |
3078 | bfd_vma roff; | |
3079 | ||
3080 | /* GD->IE transition. */ | |
3081 | BFD_ASSERT (rel->r_offset >= 2); | |
3082 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
3083 | BFD_ASSERT (type == 0x8d || type == 0x04); | |
eea6121a | 3084 | BFD_ASSERT (rel->r_offset + 9 <= input_section->size); |
13ae64f3 JJ |
3085 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) |
3086 | == 0xe8); | |
3087 | BFD_ASSERT (rel + 1 < relend); | |
3088 | BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
3089 | roff = rel->r_offset - 3; | |
3090 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
3091 | if (type == 0x04) | |
3092 | { | |
3093 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
3094 | Change it into: | |
3095 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
3096 | BFD_ASSERT (rel->r_offset >= 3); | |
3097 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
3098 | contents + rel->r_offset - 3) | |
3099 | == 0x8d); | |
3100 | BFD_ASSERT ((val & 0xc7) == 0x05 && val != (4 << 3)); | |
3101 | val >>= 3; | |
3102 | } | |
3103 | else | |
3104 | { | |
3105 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
3106 | Change it into: | |
3107 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
eea6121a | 3108 | BFD_ASSERT (rel->r_offset + 10 <= input_section->size); |
13ae64f3 JJ |
3109 | BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4); |
3110 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
3111 | contents + rel->r_offset + 9) | |
3112 | == 0x90); | |
3113 | roff = rel->r_offset - 2; | |
3114 | } | |
3115 | memcpy (contents + roff, | |
3116 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
3117 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
3118 | /* If foo is used only with foo@gotntpoff(%reg) and |
3119 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
3120 | subl $foo@gottpoff(%reg), %eax | |
3121 | into: | |
3122 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
3123 | if (tls_type == GOT_TLS_IE_POS) |
3124 | contents[roff + 6] = 0x03; | |
8c37241b JJ |
3125 | bfd_put_32 (output_bfd, |
3126 | htab->sgot->output_section->vma | |
3127 | + htab->sgot->output_offset + off | |
3128 | - htab->sgotplt->output_section->vma | |
3129 | - htab->sgotplt->output_offset, | |
13ae64f3 JJ |
3130 | contents + roff + 8); |
3131 | /* Skip R_386_PLT32. */ | |
3132 | rel++; | |
3133 | continue; | |
3134 | } | |
67a4f2b7 AO |
3135 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
3136 | { | |
3137 | /* GDesc -> IE transition. | |
3138 | It's originally something like: | |
3139 | leal x@tlsdesc(%ebx), %eax | |
3140 | ||
3141 | Change it to: | |
3142 | movl x@gotntpoff(%ebx), %eax # before nop; nop | |
3143 | or: | |
3144 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
3145 | ||
3146 | Registers other than %eax may be set up here. */ | |
3147 | ||
3148 | unsigned int val, type; | |
3149 | bfd_vma roff; | |
3150 | ||
3151 | /* First, make sure it's a leal adding ebx to a 32-bit | |
3152 | offset into any register, although it's probably | |
3153 | almost always going to be eax. */ | |
3154 | roff = rel->r_offset; | |
3155 | BFD_ASSERT (roff >= 2); | |
3156 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
3157 | BFD_ASSERT (type == 0x8d); | |
3158 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
3159 | BFD_ASSERT ((val & 0xc7) == 0x83); | |
3160 | BFD_ASSERT (roff + 4 <= input_section->size); | |
3161 | ||
3162 | /* Now modify the instruction as appropriate. */ | |
3163 | /* To turn a leal into a movl in the form we use it, it | |
3164 | suffices to change the first byte from 0x8d to 0x8b. | |
3165 | aoliva FIXME: should we decide to keep the leal, all | |
3166 | we have to do is remove the statement below, and | |
3167 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
3168 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3169 | ||
3170 | if (tls_type == GOT_TLS_IE_BOTH) | |
3171 | off += 4; | |
3172 | ||
3173 | bfd_put_32 (output_bfd, | |
3174 | htab->sgot->output_section->vma | |
3175 | + htab->sgot->output_offset + off | |
3176 | - htab->sgotplt->output_section->vma | |
3177 | - htab->sgotplt->output_offset, | |
3178 | contents + roff); | |
3179 | continue; | |
3180 | } | |
3181 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
3182 | { | |
3183 | /* GDesc -> IE transition. | |
3184 | It's originally: | |
3185 | call *(%eax) | |
3186 | ||
3187 | Change it to: | |
3188 | nop; nop | |
3189 | or | |
3190 | negl %eax | |
3191 | depending on how we transformed the TLS_GOTDESC above. | |
3192 | */ | |
3193 | ||
3194 | unsigned int val, type; | |
3195 | bfd_vma roff; | |
3196 | ||
3197 | /* First, make sure it's a call *(%eax). */ | |
3198 | roff = rel->r_offset; | |
3199 | BFD_ASSERT (roff + 2 <= input_section->size); | |
3200 | type = bfd_get_8 (input_bfd, contents + roff); | |
3201 | BFD_ASSERT (type == 0xff); | |
3202 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
3203 | BFD_ASSERT (val == 0x10); | |
3204 | ||
3205 | /* Now modify the instruction as appropriate. */ | |
3206 | if (tls_type != GOT_TLS_IE_NEG) | |
3207 | { | |
10efb593 L |
3208 | /* xchg %ax,%ax */ |
3209 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
3210 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3211 | } | |
3212 | else | |
3213 | { | |
3214 | /* negl %eax */ | |
3215 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
3216 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
3217 | } | |
3218 | ||
3219 | continue; | |
3220 | } | |
3221 | else | |
3222 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
3223 | break; |
3224 | ||
3225 | case R_386_TLS_LDM: | |
3226 | if (! info->shared) | |
3227 | { | |
3228 | unsigned int val; | |
3229 | ||
3230 | /* LD->LE transition: | |
3231 | Ensure it is: | |
3232 | leal foo(%reg), %eax; call ___tls_get_addr. | |
3233 | We change it into: | |
3234 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
3235 | BFD_ASSERT (rel->r_offset >= 2); | |
3236 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) | |
3237 | == 0x8d); | |
3238 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
3239 | BFD_ASSERT ((val & 0xf8) == 0x80 && (val & 7) != 4); | |
eea6121a | 3240 | BFD_ASSERT (rel->r_offset + 9 <= input_section->size); |
13ae64f3 JJ |
3241 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) |
3242 | == 0xe8); | |
3243 | BFD_ASSERT (rel + 1 < relend); | |
3244 | BFD_ASSERT (ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32); | |
3245 | memcpy (contents + rel->r_offset - 2, | |
3246 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
3247 | /* Skip R_386_PLT32. */ | |
3248 | rel++; | |
3249 | continue; | |
3250 | } | |
3251 | ||
3252 | if (htab->sgot == NULL) | |
3253 | abort (); | |
3254 | ||
3255 | off = htab->tls_ldm_got.offset; | |
3256 | if (off & 1) | |
3257 | off &= ~1; | |
3258 | else | |
3259 | { | |
947216bf AM |
3260 | Elf_Internal_Rela outrel; |
3261 | bfd_byte *loc; | |
13ae64f3 JJ |
3262 | |
3263 | if (htab->srelgot == NULL) | |
3264 | abort (); | |
3265 | ||
3266 | outrel.r_offset = (htab->sgot->output_section->vma | |
3267 | + htab->sgot->output_offset + off); | |
3268 | ||
3269 | bfd_put_32 (output_bfd, 0, | |
3270 | htab->sgot->contents + off); | |
3271 | bfd_put_32 (output_bfd, 0, | |
3272 | htab->sgot->contents + off + 4); | |
3273 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); | |
947216bf AM |
3274 | loc = htab->srelgot->contents; |
3275 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
3276 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3277 | htab->tls_ldm_got.offset |= 1; | |
3278 | } | |
8c37241b JJ |
3279 | relocation = htab->sgot->output_section->vma |
3280 | + htab->sgot->output_offset + off | |
3281 | - htab->sgotplt->output_section->vma | |
3282 | - htab->sgotplt->output_offset; | |
b34976b6 | 3283 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
3284 | break; |
3285 | ||
3286 | case R_386_TLS_LDO_32: | |
a45bb67d | 3287 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
13ae64f3 JJ |
3288 | relocation -= dtpoff_base (info); |
3289 | else | |
3290 | /* When converting LDO to LE, we must negate. */ | |
3291 | relocation = -tpoff (info, relocation); | |
3292 | break; | |
3293 | ||
3294 | case R_386_TLS_LE_32: | |
13ae64f3 | 3295 | case R_386_TLS_LE: |
37e55690 JJ |
3296 | if (info->shared) |
3297 | { | |
947216bf | 3298 | Elf_Internal_Rela outrel; |
37e55690 | 3299 | asection *sreloc; |
947216bf | 3300 | bfd_byte *loc; |
37e55690 JJ |
3301 | int indx; |
3302 | ||
3303 | outrel.r_offset = rel->r_offset | |
3304 | + input_section->output_section->vma | |
3305 | + input_section->output_offset; | |
3306 | if (h != NULL && h->dynindx != -1) | |
3307 | indx = h->dynindx; | |
3308 | else | |
3309 | indx = 0; | |
3310 | if (r_type == R_386_TLS_LE_32) | |
3311 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
3312 | else | |
3313 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
3314 | sreloc = elf_section_data (input_section)->sreloc; | |
3315 | if (sreloc == NULL) | |
3316 | abort (); | |
947216bf AM |
3317 | loc = sreloc->contents; |
3318 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
37e55690 JJ |
3319 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3320 | if (indx) | |
3321 | continue; | |
3322 | else if (r_type == R_386_TLS_LE_32) | |
3323 | relocation = dtpoff_base (info) - relocation; | |
3324 | else | |
3325 | relocation -= dtpoff_base (info); | |
3326 | } | |
3327 | else if (r_type == R_386_TLS_LE_32) | |
3328 | relocation = tpoff (info, relocation); | |
3329 | else | |
3330 | relocation = -tpoff (info, relocation); | |
13ae64f3 JJ |
3331 | break; |
3332 | ||
252b5132 RH |
3333 | default: |
3334 | break; | |
3335 | } | |
3336 | ||
239e1f3a AM |
3337 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3338 | because such sections are not SEC_ALLOC and thus ld.so will | |
3339 | not process them. */ | |
8c694914 | 3340 | if (unresolved_reloc |
239e1f3a | 3341 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3342 | && h->def_dynamic)) |
6a30718d JJ |
3343 | { |
3344 | (*_bfd_error_handler) | |
843fe662 | 3345 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3346 | input_bfd, |
3347 | input_section, | |
6a30718d | 3348 | (long) rel->r_offset, |
843fe662 | 3349 | howto->name, |
6a30718d | 3350 | h->root.root.string); |
b34976b6 | 3351 | return FALSE; |
6a30718d | 3352 | } |
83be169b | 3353 | |
252b5132 RH |
3354 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
3355 | contents, rel->r_offset, | |
55fd94b0 | 3356 | relocation, 0); |
252b5132 | 3357 | |
cf5c0c5b | 3358 | if (r != bfd_reloc_ok) |
252b5132 | 3359 | { |
cf5c0c5b | 3360 | const char *name; |
ffb2e45b | 3361 | |
cf5c0c5b AM |
3362 | if (h != NULL) |
3363 | name = h->root.root.string; | |
3364 | else | |
3365 | { | |
3366 | name = bfd_elf_string_from_elf_section (input_bfd, | |
3367 | symtab_hdr->sh_link, | |
3368 | sym->st_name); | |
3369 | if (name == NULL) | |
b34976b6 | 3370 | return FALSE; |
cf5c0c5b AM |
3371 | if (*name == '\0') |
3372 | name = bfd_section_name (input_bfd, sec); | |
3373 | } | |
ffb2e45b | 3374 | |
cf5c0c5b AM |
3375 | if (r == bfd_reloc_overflow) |
3376 | { | |
cf5c0c5b | 3377 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3378 | (info, (h ? &h->root : NULL), name, howto->name, |
3379 | (bfd_vma) 0, input_bfd, input_section, | |
3380 | rel->r_offset))) | |
b34976b6 | 3381 | return FALSE; |
cf5c0c5b AM |
3382 | } |
3383 | else | |
3384 | { | |
3385 | (*_bfd_error_handler) | |
d003868e AM |
3386 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3387 | input_bfd, input_section, | |
cf5c0c5b | 3388 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3389 | return FALSE; |
cf5c0c5b | 3390 | } |
252b5132 RH |
3391 | } |
3392 | } | |
3393 | ||
b34976b6 | 3394 | return TRUE; |
252b5132 RH |
3395 | } |
3396 | ||
3397 | /* Finish up dynamic symbol handling. We set the contents of various | |
3398 | dynamic sections here. */ | |
3399 | ||
b34976b6 | 3400 | static bfd_boolean |
55fd94b0 AM |
3401 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
3402 | struct bfd_link_info *info, | |
3403 | struct elf_link_hash_entry *h, | |
3404 | Elf_Internal_Sym *sym) | |
252b5132 | 3405 | { |
6725bdbf | 3406 | struct elf_i386_link_hash_table *htab; |
252b5132 | 3407 | |
6725bdbf | 3408 | htab = elf_i386_hash_table (info); |
252b5132 RH |
3409 | |
3410 | if (h->plt.offset != (bfd_vma) -1) | |
3411 | { | |
252b5132 RH |
3412 | bfd_vma plt_index; |
3413 | bfd_vma got_offset; | |
947216bf AM |
3414 | Elf_Internal_Rela rel; |
3415 | bfd_byte *loc; | |
252b5132 RH |
3416 | |
3417 | /* This symbol has an entry in the procedure linkage table. Set | |
3418 | it up. */ | |
3419 | ||
ffb2e45b AM |
3420 | if (h->dynindx == -1 |
3421 | || htab->splt == NULL | |
3422 | || htab->sgotplt == NULL | |
3423 | || htab->srelplt == NULL) | |
3424 | abort (); | |
252b5132 RH |
3425 | |
3426 | /* Get the index in the procedure linkage table which | |
3427 | corresponds to this symbol. This is the index of this symbol | |
3428 | in all the symbols for which we are making plt entries. The | |
3429 | first entry in the procedure linkage table is reserved. */ | |
3430 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3431 | ||
3432 | /* Get the offset into the .got table of the entry that | |
3433 | corresponds to this function. Each .got entry is 4 bytes. | |
3434 | The first three are reserved. */ | |
3435 | got_offset = (plt_index + 3) * 4; | |
3436 | ||
3437 | /* Fill in the entry in the procedure linkage table. */ | |
3438 | if (! info->shared) | |
3439 | { | |
6725bdbf | 3440 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_plt_entry, |
252b5132 RH |
3441 | PLT_ENTRY_SIZE); |
3442 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
3443 | (htab->sgotplt->output_section->vma |
3444 | + htab->sgotplt->output_offset | |
252b5132 | 3445 | + got_offset), |
6725bdbf | 3446 | htab->splt->contents + h->plt.offset + 2); |
eac338cf PB |
3447 | |
3448 | if (htab->is_vxworks) | |
3449 | { | |
3450 | int s, k, reloc_index; | |
3451 | ||
3452 | /* Create the R_386_32 relocation referencing the GOT | |
3453 | for this PLT entry. */ | |
3454 | ||
3455 | /* S: Current slot number (zero-based). */ | |
3456 | s = (h->plt.offset - PLT_ENTRY_SIZE) / PLT_ENTRY_SIZE; | |
3457 | /* K: Number of relocations for PLTResolve. */ | |
3458 | if (info->shared) | |
3459 | k = PLTRESOLVE_RELOCS_SHLIB; | |
3460 | else | |
3461 | k = PLTRESOLVE_RELOCS; | |
3462 | /* Skip the PLTresolve relocations, and the relocations for | |
3463 | the other PLT slots. */ | |
3464 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
3465 | loc = (htab->srelplt2->contents + reloc_index | |
3466 | * sizeof (Elf32_External_Rel)); | |
3467 | ||
3468 | rel.r_offset = (htab->splt->output_section->vma | |
3469 | + htab->splt->output_offset | |
3470 | + h->plt.offset + 2), | |
7325306f | 3471 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3472 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
3473 | ||
3474 | /* Create the R_386_32 relocation referencing the beginning of | |
3475 | the PLT for this GOT entry. */ | |
3476 | rel.r_offset = (htab->sgotplt->output_section->vma | |
3477 | + htab->sgotplt->output_offset | |
3478 | + got_offset); | |
7325306f | 3479 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
3480 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
3481 | loc + sizeof (Elf32_External_Rel)); | |
3482 | } | |
252b5132 RH |
3483 | } |
3484 | else | |
3485 | { | |
6725bdbf | 3486 | memcpy (htab->splt->contents + h->plt.offset, elf_i386_pic_plt_entry, |
252b5132 RH |
3487 | PLT_ENTRY_SIZE); |
3488 | bfd_put_32 (output_bfd, got_offset, | |
6725bdbf | 3489 | htab->splt->contents + h->plt.offset + 2); |
252b5132 RH |
3490 | } |
3491 | ||
3492 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
6725bdbf | 3493 | htab->splt->contents + h->plt.offset + 7); |
252b5132 | 3494 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), |
6725bdbf | 3495 | htab->splt->contents + h->plt.offset + 12); |
252b5132 RH |
3496 | |
3497 | /* Fill in the entry in the global offset table. */ | |
3498 | bfd_put_32 (output_bfd, | |
6725bdbf AM |
3499 | (htab->splt->output_section->vma |
3500 | + htab->splt->output_offset | |
252b5132 RH |
3501 | + h->plt.offset |
3502 | + 6), | |
6725bdbf | 3503 | htab->sgotplt->contents + got_offset); |
252b5132 RH |
3504 | |
3505 | /* Fill in the entry in the .rel.plt section. */ | |
6725bdbf AM |
3506 | rel.r_offset = (htab->sgotplt->output_section->vma |
3507 | + htab->sgotplt->output_offset | |
252b5132 RH |
3508 | + got_offset); |
3509 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
947216bf | 3510 | loc = htab->srelplt->contents + plt_index * sizeof (Elf32_External_Rel); |
0ac8d2ca | 3511 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 | 3512 | |
f5385ebf | 3513 | if (!h->def_regular) |
252b5132 RH |
3514 | { |
3515 | /* Mark the symbol as undefined, rather than as defined in | |
c6585bbb JJ |
3516 | the .plt section. Leave the value if there were any |
3517 | relocations where pointer equality matters (this is a clue | |
51b64d56 AM |
3518 | for the dynamic linker, to make function pointer |
3519 | comparisons work between an application and shared | |
c6585bbb JJ |
3520 | library), otherwise set it to zero. If a function is only |
3521 | called from a binary, there is no need to slow down | |
3522 | shared libraries because of that. */ | |
252b5132 | 3523 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 3524 | if (!h->pointer_equality_needed) |
c6585bbb | 3525 | sym->st_value = 0; |
252b5132 RH |
3526 | } |
3527 | } | |
3528 | ||
13ae64f3 | 3529 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 3530 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
37e55690 | 3531 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0) |
252b5132 | 3532 | { |
947216bf AM |
3533 | Elf_Internal_Rela rel; |
3534 | bfd_byte *loc; | |
252b5132 RH |
3535 | |
3536 | /* This symbol has an entry in the global offset table. Set it | |
3537 | up. */ | |
3538 | ||
ffb2e45b AM |
3539 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3540 | abort (); | |
252b5132 | 3541 | |
6725bdbf AM |
3542 | rel.r_offset = (htab->sgot->output_section->vma |
3543 | + htab->sgot->output_offset | |
dc810e39 | 3544 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 3545 | |
dd5724d5 AM |
3546 | /* If this is a static link, or it is a -Bsymbolic link and the |
3547 | symbol is defined locally or was forced to be local because | |
3548 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
3549 | The entry in the global offset table will already have been |
3550 | initialized in the relocate_section function. */ | |
6725bdbf | 3551 | if (info->shared |
586119b3 | 3552 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
dd5724d5 | 3553 | { |
6725bdbf | 3554 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
3555 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
3556 | } | |
252b5132 RH |
3557 | else |
3558 | { | |
dd5724d5 | 3559 | BFD_ASSERT((h->got.offset & 1) == 0); |
6725bdbf AM |
3560 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
3561 | htab->sgot->contents + h->got.offset); | |
252b5132 RH |
3562 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
3563 | } | |
3564 | ||
947216bf AM |
3565 | loc = htab->srelgot->contents; |
3566 | loc += htab->srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 3567 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 RH |
3568 | } |
3569 | ||
f5385ebf | 3570 | if (h->needs_copy) |
252b5132 | 3571 | { |
947216bf AM |
3572 | Elf_Internal_Rela rel; |
3573 | bfd_byte *loc; | |
252b5132 RH |
3574 | |
3575 | /* This symbol needs a copy reloc. Set it up. */ | |
3576 | ||
ffb2e45b AM |
3577 | if (h->dynindx == -1 |
3578 | || (h->root.type != bfd_link_hash_defined | |
3579 | && h->root.type != bfd_link_hash_defweak) | |
3580 | || htab->srelbss == NULL) | |
3581 | abort (); | |
252b5132 RH |
3582 | |
3583 | rel.r_offset = (h->root.u.def.value | |
3584 | + h->root.u.def.section->output_section->vma | |
3585 | + h->root.u.def.section->output_offset); | |
3586 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
947216bf AM |
3587 | loc = htab->srelbss->contents; |
3588 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 3589 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 RH |
3590 | } |
3591 | ||
eac338cf PB |
3592 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. |
3593 | On VxWorks, the _GLOBAL_OFFSET_TABLE_ symbol is not absolute: it | |
3594 | is relative to the ".got" section. */ | |
252b5132 | 3595 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 |
22edb2f1 | 3596 | || (!htab->is_vxworks && h == htab->elf.hgot)) |
252b5132 RH |
3597 | sym->st_shndx = SHN_ABS; |
3598 | ||
b34976b6 | 3599 | return TRUE; |
252b5132 RH |
3600 | } |
3601 | ||
38701953 AM |
3602 | /* Used to decide how to sort relocs in an optimal manner for the |
3603 | dynamic linker, before writing them out. */ | |
3604 | ||
3605 | static enum elf_reloc_type_class | |
55fd94b0 | 3606 | elf_i386_reloc_type_class (const Elf_Internal_Rela *rela) |
38701953 | 3607 | { |
55fd94b0 | 3608 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 AM |
3609 | { |
3610 | case R_386_RELATIVE: | |
3611 | return reloc_class_relative; | |
3612 | case R_386_JUMP_SLOT: | |
3613 | return reloc_class_plt; | |
3614 | case R_386_COPY: | |
3615 | return reloc_class_copy; | |
3616 | default: | |
3617 | return reloc_class_normal; | |
3618 | } | |
3619 | } | |
3620 | ||
252b5132 RH |
3621 | /* Finish up the dynamic sections. */ |
3622 | ||
b34976b6 | 3623 | static bfd_boolean |
55fd94b0 AM |
3624 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
3625 | struct bfd_link_info *info) | |
252b5132 | 3626 | { |
6725bdbf | 3627 | struct elf_i386_link_hash_table *htab; |
252b5132 | 3628 | bfd *dynobj; |
252b5132 RH |
3629 | asection *sdyn; |
3630 | ||
6725bdbf | 3631 | htab = elf_i386_hash_table (info); |
ebe50bae | 3632 | dynobj = htab->elf.dynobj; |
252b5132 RH |
3633 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3634 | ||
ebe50bae | 3635 | if (htab->elf.dynamic_sections_created) |
252b5132 | 3636 | { |
252b5132 RH |
3637 | Elf32_External_Dyn *dyncon, *dynconend; |
3638 | ||
ffb2e45b AM |
3639 | if (sdyn == NULL || htab->sgot == NULL) |
3640 | abort (); | |
252b5132 RH |
3641 | |
3642 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 3643 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
3644 | for (; dyncon < dynconend; dyncon++) |
3645 | { | |
3646 | Elf_Internal_Dyn dyn; | |
51b64d56 | 3647 | asection *s; |
252b5132 RH |
3648 | |
3649 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
3650 | ||
3651 | switch (dyn.d_tag) | |
3652 | { | |
3653 | default: | |
0ac8d2ca | 3654 | continue; |
252b5132 RH |
3655 | |
3656 | case DT_PLTGOT: | |
8c37241b JJ |
3657 | s = htab->sgotplt; |
3658 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
6725bdbf AM |
3659 | break; |
3660 | ||
252b5132 | 3661 | case DT_JMPREL: |
6348e046 AM |
3662 | s = htab->srelplt; |
3663 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
252b5132 RH |
3664 | break; |
3665 | ||
3666 | case DT_PLTRELSZ: | |
6348e046 | 3667 | s = htab->srelplt; |
eea6121a | 3668 | dyn.d_un.d_val = s->size; |
252b5132 RH |
3669 | break; |
3670 | ||
3671 | case DT_RELSZ: | |
3672 | /* My reading of the SVR4 ABI indicates that the | |
3673 | procedure linkage table relocs (DT_JMPREL) should be | |
3674 | included in the overall relocs (DT_REL). This is | |
3675 | what Solaris does. However, UnixWare can not handle | |
3676 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 AM |
3677 | here to make it not include the JMPREL relocs. */ |
3678 | s = htab->srelplt; | |
3679 | if (s == NULL) | |
3680 | continue; | |
eea6121a | 3681 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
3682 | break; |
3683 | ||
3684 | case DT_REL: | |
3685 | /* We may not be using the standard ELF linker script. | |
3686 | If .rel.plt is the first .rel section, we adjust | |
3687 | DT_REL to not include it. */ | |
3688 | s = htab->srelplt; | |
3689 | if (s == NULL) | |
3690 | continue; | |
3691 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
3692 | continue; | |
eea6121a | 3693 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
3694 | break; |
3695 | } | |
0ac8d2ca AM |
3696 | |
3697 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
3698 | } |
3699 | ||
3700 | /* Fill in the first entry in the procedure linkage table. */ | |
eea6121a | 3701 | if (htab->splt && htab->splt->size > 0) |
252b5132 RH |
3702 | { |
3703 | if (info->shared) | |
eac338cf PB |
3704 | { |
3705 | memcpy (htab->splt->contents, elf_i386_pic_plt0_entry, | |
3706 | sizeof (elf_i386_pic_plt0_entry)); | |
3707 | memset (htab->splt->contents + sizeof (elf_i386_pic_plt0_entry), | |
3708 | htab->plt0_pad_byte, | |
3709 | PLT_ENTRY_SIZE - sizeof (elf_i386_pic_plt0_entry)); | |
3710 | } | |
252b5132 RH |
3711 | else |
3712 | { | |
eac338cf PB |
3713 | memcpy (htab->splt->contents, elf_i386_plt0_entry, |
3714 | sizeof(elf_i386_plt0_entry)); | |
3715 | memset (htab->splt->contents + sizeof (elf_i386_plt0_entry), | |
3716 | htab->plt0_pad_byte, | |
3717 | PLT_ENTRY_SIZE - sizeof (elf_i386_plt0_entry)); | |
252b5132 | 3718 | bfd_put_32 (output_bfd, |
6725bdbf AM |
3719 | (htab->sgotplt->output_section->vma |
3720 | + htab->sgotplt->output_offset | |
3721 | + 4), | |
3722 | htab->splt->contents + 2); | |
252b5132 | 3723 | bfd_put_32 (output_bfd, |
6725bdbf AM |
3724 | (htab->sgotplt->output_section->vma |
3725 | + htab->sgotplt->output_offset | |
3726 | + 8), | |
3727 | htab->splt->contents + 8); | |
eac338cf PB |
3728 | |
3729 | if (htab->is_vxworks) | |
3730 | { | |
3731 | Elf_Internal_Rela rel; | |
7325306f | 3732 | |
eac338cf PB |
3733 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
3734 | On IA32 we use REL relocations so the addend goes in | |
3735 | the PLT directly. */ | |
3736 | rel.r_offset = (htab->splt->output_section->vma | |
3737 | + htab->splt->output_offset | |
3738 | + 2); | |
7325306f | 3739 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3740 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
3741 | htab->srelplt2->contents); | |
3742 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
3743 | rel.r_offset = (htab->splt->output_section->vma | |
3744 | + htab->splt->output_offset | |
3745 | + 8); | |
7325306f | 3746 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3747 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
3748 | htab->srelplt2->contents + | |
3749 | sizeof (Elf32_External_Rel)); | |
3750 | } | |
252b5132 RH |
3751 | } |
3752 | ||
3753 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
3754 | really seem like the right value. */ | |
6725bdbf AM |
3755 | elf_section_data (htab->splt->output_section) |
3756 | ->this_hdr.sh_entsize = 4; | |
eac338cf PB |
3757 | |
3758 | /* Correct the .rel.plt.unloaded relocations. */ | |
3759 | if (htab->is_vxworks && !info->shared) | |
3760 | { | |
3761 | int num_plts = (htab->splt->size / PLT_ENTRY_SIZE) - 1; | |
4c9b0de6 | 3762 | unsigned char *p; |
eac338cf PB |
3763 | |
3764 | p = htab->srelplt2->contents; | |
3765 | if (info->shared) | |
3766 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
3767 | else | |
3768 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
3769 | ||
3770 | for (; num_plts; num_plts--) | |
3771 | { | |
3772 | Elf_Internal_Rela rel; | |
3773 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 3774 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
3775 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
3776 | p += sizeof (Elf32_External_Rel); | |
3777 | ||
3778 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 3779 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
3780 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
3781 | p += sizeof (Elf32_External_Rel); | |
3782 | } | |
3783 | } | |
252b5132 RH |
3784 | } |
3785 | } | |
3786 | ||
12d0ee4a | 3787 | if (htab->sgotplt) |
252b5132 | 3788 | { |
12d0ee4a | 3789 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3790 | if (htab->sgotplt->size > 0) |
12d0ee4a AM |
3791 | { |
3792 | bfd_put_32 (output_bfd, | |
55fd94b0 | 3793 | (sdyn == NULL ? 0 |
12d0ee4a AM |
3794 | : sdyn->output_section->vma + sdyn->output_offset), |
3795 | htab->sgotplt->contents); | |
55fd94b0 AM |
3796 | bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 4); |
3797 | bfd_put_32 (output_bfd, 0, htab->sgotplt->contents + 8); | |
12d0ee4a | 3798 | } |
252b5132 | 3799 | |
12d0ee4a AM |
3800 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = 4; |
3801 | } | |
8c37241b | 3802 | |
eea6121a | 3803 | if (htab->sgot && htab->sgot->size > 0) |
8c37241b JJ |
3804 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize = 4; |
3805 | ||
b34976b6 | 3806 | return TRUE; |
252b5132 RH |
3807 | } |
3808 | ||
4c45e5c9 JJ |
3809 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3810 | or (bfd_vma) -1 if it should not be included. */ | |
3811 | ||
3812 | static bfd_vma | |
3813 | elf_i386_plt_sym_val (bfd_vma i, const asection *plt, | |
3814 | const arelent *rel ATTRIBUTE_UNUSED) | |
3815 | { | |
3816 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
3817 | } | |
3818 | ||
fdc90cb4 JJ |
3819 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
3820 | ||
3821 | static bfd_boolean | |
3822 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
3823 | { | |
3824 | if (h->plt.offset != (bfd_vma) -1 | |
3825 | && !h->def_regular | |
3826 | && !h->pointer_equality_needed) | |
3827 | return FALSE; | |
3828 | ||
3829 | return _bfd_elf_hash_symbol (h); | |
3830 | } | |
4c45e5c9 | 3831 | |
252b5132 RH |
3832 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec |
3833 | #define TARGET_LITTLE_NAME "elf32-i386" | |
3834 | #define ELF_ARCH bfd_arch_i386 | |
3835 | #define ELF_MACHINE_CODE EM_386 | |
3836 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
3837 | |
3838 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3839 | #define elf_backend_can_refcount 1 |
252b5132 RH |
3840 | #define elf_backend_want_got_plt 1 |
3841 | #define elf_backend_plt_readonly 1 | |
3842 | #define elf_backend_want_plt_sym 0 | |
3843 | #define elf_backend_got_header_size 12 | |
252b5132 | 3844 | |
8c29f035 AM |
3845 | /* Support RELA for objdump of prelink objects. */ |
3846 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
3847 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
3848 | ||
13ae64f3 | 3849 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 3850 | |
dd5724d5 AM |
3851 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
3852 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
3853 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup | |
3854 | ||
3855 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
3856 | #define elf_backend_check_relocs elf_i386_check_relocs | |
0ac8d2ca | 3857 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 3858 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 3859 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
3860 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
3861 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
3862 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
3863 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
3864 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
3865 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 3866 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
3867 | #define elf_backend_relocate_section elf_i386_relocate_section |
3868 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 3869 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
3870 | #define elf_backend_omit_section_dynsym \ |
3871 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
4c45e5c9 | 3872 | #define elf_backend_plt_sym_val elf_i386_plt_sym_val |
fdc90cb4 | 3873 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
dd5724d5 | 3874 | |
252b5132 | 3875 | #include "elf32-target.h" |
2bc3c89a AM |
3876 | |
3877 | /* FreeBSD support. */ | |
3878 | ||
3879 | #undef TARGET_LITTLE_SYM | |
3880 | #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec | |
3881 | #undef TARGET_LITTLE_NAME | |
3882 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
3883 | ||
3884 | /* The kernel recognizes executables as valid only if they carry a | |
3885 | "FreeBSD" label in the ELF header. So we put this label on all | |
3886 | executables and (for simplicity) also all other object files. */ | |
3887 | ||
2bc3c89a | 3888 | static void |
55fd94b0 AM |
3889 | elf_i386_post_process_headers (bfd *abfd, |
3890 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
2bc3c89a AM |
3891 | { |
3892 | Elf_Internal_Ehdr *i_ehdrp; | |
3893 | ||
3894 | i_ehdrp = elf_elfheader (abfd); | |
3895 | ||
3896 | /* Put an ABI label supported by FreeBSD >= 4.1. */ | |
3897 | i_ehdrp->e_ident[EI_OSABI] = ELFOSABI_FREEBSD; | |
3898 | #ifdef OLD_FREEBSD_ABI_LABEL | |
3899 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
3900 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
caf47ea6 | 3901 | #endif |
2bc3c89a AM |
3902 | } |
3903 | ||
3904 | #undef elf_backend_post_process_headers | |
571fe01f NC |
3905 | #define elf_backend_post_process_headers elf_i386_post_process_headers |
3906 | #undef elf32_bed | |
3907 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a AM |
3908 | |
3909 | #include "elf32-target.h" | |
eac338cf PB |
3910 | |
3911 | /* VxWorks support. */ | |
3912 | ||
3913 | #undef TARGET_LITTLE_SYM | |
3914 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec | |
3915 | #undef TARGET_LITTLE_NAME | |
3916 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
3917 | ||
3918 | ||
3919 | /* Like elf_i386_link_hash_table_create but with tweaks for VxWorks. */ | |
3920 | ||
3921 | static struct bfd_link_hash_table * | |
3922 | elf_i386_vxworks_link_hash_table_create (bfd *abfd) | |
3923 | { | |
3924 | struct bfd_link_hash_table *ret; | |
3925 | struct elf_i386_link_hash_table *htab; | |
3926 | ||
3927 | ret = elf_i386_link_hash_table_create (abfd); | |
3928 | if (ret) | |
3929 | { | |
3930 | htab = (struct elf_i386_link_hash_table *) ret; | |
3931 | htab->is_vxworks = 1; | |
3932 | htab->plt0_pad_byte = 0x90; | |
3933 | } | |
3934 | ||
3935 | return ret; | |
3936 | } | |
3937 | ||
3938 | ||
eac338cf PB |
3939 | #undef elf_backend_post_process_headers |
3940 | #undef bfd_elf32_bfd_link_hash_table_create | |
3941 | #define bfd_elf32_bfd_link_hash_table_create \ | |
3942 | elf_i386_vxworks_link_hash_table_create | |
3943 | #undef elf_backend_add_symbol_hook | |
3944 | #define elf_backend_add_symbol_hook \ | |
3945 | elf_vxworks_add_symbol_hook | |
3946 | #undef elf_backend_link_output_symbol_hook | |
3947 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 3948 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
3949 | #undef elf_backend_emit_relocs |
3950 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
3951 | #undef elf_backend_final_write_processing | |
3952 | #define elf_backend_final_write_processing \ | |
3953 | elf_vxworks_final_write_processing | |
3954 | ||
3955 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
3956 | define it. */ | |
3957 | #undef elf_backend_want_plt_sym | |
3958 | #define elf_backend_want_plt_sym 1 | |
3959 | ||
3960 | #undef elf32_bed | |
3961 | #define elf32_bed elf32_i386_vxworks_bed | |
3962 | ||
3963 | #include "elf32-target.h" |