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, |
1d7e9d18 | 3 | 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012 |
9f973f28 | 4 | Free Software Foundation, Inc. |
252b5132 | 5 | |
571fe01f | 6 | This file is part of BFD, the Binary File Descriptor library. |
252b5132 | 7 | |
571fe01f NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
571fe01f | 11 | (at your option) any later version. |
252b5132 | 12 | |
571fe01f NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
252b5132 | 17 | |
571fe01f NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
252b5132 | 22 | |
252b5132 | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
252b5132 RH |
25 | #include "bfdlink.h" |
26 | #include "libbfd.h" | |
27 | #include "elf-bfd.h" | |
5a68afcf | 28 | #include "elf-nacl.h" |
eac338cf | 29 | #include "elf-vxworks.h" |
142411ca | 30 | #include "bfd_stdint.h" |
c25bc9fc L |
31 | #include "objalloc.h" |
32 | #include "hashtab.h" | |
e41b3a13 | 33 | #include "dwarf2.h" |
252b5132 | 34 | |
55fd94b0 AM |
35 | /* 386 uses REL relocations instead of RELA. */ |
36 | #define USE_REL 1 | |
252b5132 RH |
37 | |
38 | #include "elf/i386.h" | |
39 | ||
40 | static reloc_howto_type elf_howto_table[]= | |
41 | { | |
b34976b6 | 42 | HOWTO(R_386_NONE, 0, 0, 0, FALSE, 0, complain_overflow_bitfield, |
1b452ec6 | 43 | bfd_elf_generic_reloc, "R_386_NONE", |
b34976b6 AM |
44 | TRUE, 0x00000000, 0x00000000, FALSE), |
45 | HOWTO(R_386_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 46 | bfd_elf_generic_reloc, "R_386_32", |
b34976b6 AM |
47 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
48 | HOWTO(R_386_PC32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 49 | bfd_elf_generic_reloc, "R_386_PC32", |
b34976b6 AM |
50 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
51 | HOWTO(R_386_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 52 | bfd_elf_generic_reloc, "R_386_GOT32", |
b34976b6 AM |
53 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
54 | HOWTO(R_386_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 55 | bfd_elf_generic_reloc, "R_386_PLT32", |
b34976b6 AM |
56 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
57 | HOWTO(R_386_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 58 | bfd_elf_generic_reloc, "R_386_COPY", |
b34976b6 AM |
59 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
60 | HOWTO(R_386_GLOB_DAT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 61 | bfd_elf_generic_reloc, "R_386_GLOB_DAT", |
b34976b6 AM |
62 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
63 | HOWTO(R_386_JUMP_SLOT, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 64 | bfd_elf_generic_reloc, "R_386_JUMP_SLOT", |
b34976b6 AM |
65 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
66 | HOWTO(R_386_RELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 67 | bfd_elf_generic_reloc, "R_386_RELATIVE", |
b34976b6 AM |
68 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
69 | HOWTO(R_386_GOTOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 70 | bfd_elf_generic_reloc, "R_386_GOTOFF", |
b34976b6 AM |
71 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
72 | HOWTO(R_386_GOTPC, 0, 2, 32, TRUE, 0, complain_overflow_bitfield, | |
1b452ec6 | 73 | bfd_elf_generic_reloc, "R_386_GOTPC", |
b34976b6 | 74 | TRUE, 0xffffffff, 0xffffffff, TRUE), |
1b452ec6 | 75 | |
dc47f327 AM |
76 | /* We have a gap in the reloc numbers here. |
77 | R_386_standard counts the number up to this point, and | |
78 | R_386_ext_offset is the value to subtract from a reloc type of | |
79 | R_386_16 thru R_386_PC8 to form an index into this table. */ | |
55fd94b0 AM |
80 | #define R_386_standard (R_386_GOTPC + 1) |
81 | #define R_386_ext_offset (R_386_TLS_TPOFF - R_386_standard) | |
1b452ec6 | 82 | |
37e55690 | 83 | /* These relocs are a GNU extension. */ |
b34976b6 | 84 | HOWTO(R_386_TLS_TPOFF, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
37e55690 | 85 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF", |
b34976b6 AM |
86 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
87 | HOWTO(R_386_TLS_IE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 88 | bfd_elf_generic_reloc, "R_386_TLS_IE", |
b34976b6 AM |
89 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
90 | HOWTO(R_386_TLS_GOTIE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
37e55690 | 91 | bfd_elf_generic_reloc, "R_386_TLS_GOTIE", |
b34976b6 AM |
92 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
93 | HOWTO(R_386_TLS_LE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 94 | bfd_elf_generic_reloc, "R_386_TLS_LE", |
b34976b6 AM |
95 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
96 | HOWTO(R_386_TLS_GD, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 97 | bfd_elf_generic_reloc, "R_386_TLS_GD", |
b34976b6 AM |
98 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
99 | HOWTO(R_386_TLS_LDM, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 100 | bfd_elf_generic_reloc, "R_386_TLS_LDM", |
b34976b6 AM |
101 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
102 | HOWTO(R_386_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 103 | bfd_elf_generic_reloc, "R_386_16", |
b34976b6 | 104 | TRUE, 0xffff, 0xffff, FALSE), |
b0360d8c | 105 | HOWTO(R_386_PC16, 0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
1b452ec6 | 106 | bfd_elf_generic_reloc, "R_386_PC16", |
b34976b6 AM |
107 | TRUE, 0xffff, 0xffff, TRUE), |
108 | HOWTO(R_386_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, | |
1b452ec6 | 109 | bfd_elf_generic_reloc, "R_386_8", |
b34976b6 AM |
110 | TRUE, 0xff, 0xff, FALSE), |
111 | HOWTO(R_386_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
1b452ec6 | 112 | bfd_elf_generic_reloc, "R_386_PC8", |
b34976b6 | 113 | TRUE, 0xff, 0xff, TRUE), |
dc47f327 | 114 | |
55fd94b0 AM |
115 | #define R_386_ext (R_386_PC8 + 1 - R_386_ext_offset) |
116 | #define R_386_tls_offset (R_386_TLS_LDO_32 - R_386_ext) | |
13ae64f3 | 117 | /* These are common with Solaris TLS implementation. */ |
b34976b6 | 118 | HOWTO(R_386_TLS_LDO_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
13ae64f3 | 119 | bfd_elf_generic_reloc, "R_386_TLS_LDO_32", |
b34976b6 AM |
120 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
121 | HOWTO(R_386_TLS_IE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 122 | bfd_elf_generic_reloc, "R_386_TLS_IE_32", |
b34976b6 AM |
123 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
124 | HOWTO(R_386_TLS_LE_32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 125 | bfd_elf_generic_reloc, "R_386_TLS_LE_32", |
b34976b6 AM |
126 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
127 | HOWTO(R_386_TLS_DTPMOD32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 128 | bfd_elf_generic_reloc, "R_386_TLS_DTPMOD32", |
b34976b6 AM |
129 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
130 | HOWTO(R_386_TLS_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 131 | bfd_elf_generic_reloc, "R_386_TLS_DTPOFF32", |
b34976b6 AM |
132 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
133 | HOWTO(R_386_TLS_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
13ae64f3 | 134 | bfd_elf_generic_reloc, "R_386_TLS_TPOFF32", |
b34976b6 | 135 | TRUE, 0xffffffff, 0xffffffff, FALSE), |
67a4f2b7 AO |
136 | EMPTY_HOWTO (38), |
137 | HOWTO(R_386_TLS_GOTDESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
138 | bfd_elf_generic_reloc, "R_386_TLS_GOTDESC", | |
139 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
140 | HOWTO(R_386_TLS_DESC_CALL, 0, 0, 0, FALSE, 0, complain_overflow_dont, | |
141 | bfd_elf_generic_reloc, "R_386_TLS_DESC_CALL", | |
142 | FALSE, 0, 0, FALSE), | |
143 | HOWTO(R_386_TLS_DESC, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
144 | bfd_elf_generic_reloc, "R_386_TLS_DESC", | |
145 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
cbe950e9 L |
146 | HOWTO(R_386_IRELATIVE, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, |
147 | bfd_elf_generic_reloc, "R_386_IRELATIVE", | |
148 | TRUE, 0xffffffff, 0xffffffff, FALSE), | |
13ae64f3 JJ |
149 | |
150 | /* Another gap. */ | |
cbe950e9 L |
151 | #define R_386_irelative (R_386_IRELATIVE + 1 - R_386_tls_offset) |
152 | #define R_386_vt_offset (R_386_GNU_VTINHERIT - R_386_irelative) | |
252b5132 RH |
153 | |
154 | /* GNU extension to record C++ vtable hierarchy. */ | |
252b5132 RH |
155 | HOWTO (R_386_GNU_VTINHERIT, /* type */ |
156 | 0, /* rightshift */ | |
157 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
158 | 0, /* bitsize */ | |
b34976b6 | 159 | FALSE, /* pc_relative */ |
252b5132 RH |
160 | 0, /* bitpos */ |
161 | complain_overflow_dont, /* complain_on_overflow */ | |
162 | NULL, /* special_function */ | |
163 | "R_386_GNU_VTINHERIT", /* name */ | |
b34976b6 | 164 | FALSE, /* partial_inplace */ |
252b5132 RH |
165 | 0, /* src_mask */ |
166 | 0, /* dst_mask */ | |
b34976b6 | 167 | FALSE), /* pcrel_offset */ |
252b5132 RH |
168 | |
169 | /* GNU extension to record C++ vtable member usage. */ | |
252b5132 RH |
170 | HOWTO (R_386_GNU_VTENTRY, /* type */ |
171 | 0, /* rightshift */ | |
172 | 2, /* size (0 = byte, 1 = short, 2 = long) */ | |
173 | 0, /* bitsize */ | |
b34976b6 | 174 | FALSE, /* pc_relative */ |
252b5132 RH |
175 | 0, /* bitpos */ |
176 | complain_overflow_dont, /* complain_on_overflow */ | |
177 | _bfd_elf_rel_vtable_reloc_fn, /* special_function */ | |
178 | "R_386_GNU_VTENTRY", /* name */ | |
b34976b6 | 179 | FALSE, /* partial_inplace */ |
252b5132 RH |
180 | 0, /* src_mask */ |
181 | 0, /* dst_mask */ | |
b34976b6 | 182 | FALSE) /* pcrel_offset */ |
dc47f327 | 183 | |
55fd94b0 | 184 | #define R_386_vt (R_386_GNU_VTENTRY + 1 - R_386_vt_offset) |
dc47f327 AM |
185 | |
186 | }; | |
187 | ||
252b5132 | 188 | #ifdef DEBUG_GEN_RELOC |
55fd94b0 AM |
189 | #define TRACE(str) \ |
190 | fprintf (stderr, "i386 bfd reloc lookup %d (%s)\n", code, str) | |
252b5132 RH |
191 | #else |
192 | #define TRACE(str) | |
193 | #endif | |
194 | ||
195 | static reloc_howto_type * | |
55fd94b0 AM |
196 | elf_i386_reloc_type_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
197 | bfd_reloc_code_real_type code) | |
252b5132 RH |
198 | { |
199 | switch (code) | |
200 | { | |
201 | case BFD_RELOC_NONE: | |
202 | TRACE ("BFD_RELOC_NONE"); | |
55fd94b0 | 203 | return &elf_howto_table[R_386_NONE]; |
252b5132 RH |
204 | |
205 | case BFD_RELOC_32: | |
206 | TRACE ("BFD_RELOC_32"); | |
55fd94b0 | 207 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
208 | |
209 | case BFD_RELOC_CTOR: | |
210 | TRACE ("BFD_RELOC_CTOR"); | |
55fd94b0 | 211 | return &elf_howto_table[R_386_32]; |
252b5132 RH |
212 | |
213 | case BFD_RELOC_32_PCREL: | |
214 | TRACE ("BFD_RELOC_PC32"); | |
55fd94b0 | 215 | return &elf_howto_table[R_386_PC32]; |
252b5132 RH |
216 | |
217 | case BFD_RELOC_386_GOT32: | |
218 | TRACE ("BFD_RELOC_386_GOT32"); | |
55fd94b0 | 219 | return &elf_howto_table[R_386_GOT32]; |
252b5132 RH |
220 | |
221 | case BFD_RELOC_386_PLT32: | |
222 | TRACE ("BFD_RELOC_386_PLT32"); | |
55fd94b0 | 223 | return &elf_howto_table[R_386_PLT32]; |
252b5132 RH |
224 | |
225 | case BFD_RELOC_386_COPY: | |
226 | TRACE ("BFD_RELOC_386_COPY"); | |
55fd94b0 | 227 | return &elf_howto_table[R_386_COPY]; |
252b5132 RH |
228 | |
229 | case BFD_RELOC_386_GLOB_DAT: | |
230 | TRACE ("BFD_RELOC_386_GLOB_DAT"); | |
55fd94b0 | 231 | return &elf_howto_table[R_386_GLOB_DAT]; |
252b5132 RH |
232 | |
233 | case BFD_RELOC_386_JUMP_SLOT: | |
234 | TRACE ("BFD_RELOC_386_JUMP_SLOT"); | |
55fd94b0 | 235 | return &elf_howto_table[R_386_JUMP_SLOT]; |
252b5132 RH |
236 | |
237 | case BFD_RELOC_386_RELATIVE: | |
238 | TRACE ("BFD_RELOC_386_RELATIVE"); | |
55fd94b0 | 239 | return &elf_howto_table[R_386_RELATIVE]; |
252b5132 RH |
240 | |
241 | case BFD_RELOC_386_GOTOFF: | |
242 | TRACE ("BFD_RELOC_386_GOTOFF"); | |
55fd94b0 | 243 | return &elf_howto_table[R_386_GOTOFF]; |
252b5132 RH |
244 | |
245 | case BFD_RELOC_386_GOTPC: | |
246 | TRACE ("BFD_RELOC_386_GOTPC"); | |
55fd94b0 | 247 | return &elf_howto_table[R_386_GOTPC]; |
252b5132 | 248 | |
37e55690 JJ |
249 | /* These relocs are a GNU extension. */ |
250 | case BFD_RELOC_386_TLS_TPOFF: | |
251 | TRACE ("BFD_RELOC_386_TLS_TPOFF"); | |
55fd94b0 | 252 | return &elf_howto_table[R_386_TLS_TPOFF - R_386_ext_offset]; |
37e55690 JJ |
253 | |
254 | case BFD_RELOC_386_TLS_IE: | |
255 | TRACE ("BFD_RELOC_386_TLS_IE"); | |
55fd94b0 | 256 | return &elf_howto_table[R_386_TLS_IE - R_386_ext_offset]; |
37e55690 JJ |
257 | |
258 | case BFD_RELOC_386_TLS_GOTIE: | |
259 | TRACE ("BFD_RELOC_386_TLS_GOTIE"); | |
55fd94b0 | 260 | return &elf_howto_table[R_386_TLS_GOTIE - R_386_ext_offset]; |
37e55690 | 261 | |
13ae64f3 JJ |
262 | case BFD_RELOC_386_TLS_LE: |
263 | TRACE ("BFD_RELOC_386_TLS_LE"); | |
55fd94b0 | 264 | return &elf_howto_table[R_386_TLS_LE - R_386_ext_offset]; |
13ae64f3 JJ |
265 | |
266 | case BFD_RELOC_386_TLS_GD: | |
267 | TRACE ("BFD_RELOC_386_TLS_GD"); | |
55fd94b0 | 268 | return &elf_howto_table[R_386_TLS_GD - R_386_ext_offset]; |
13ae64f3 JJ |
269 | |
270 | case BFD_RELOC_386_TLS_LDM: | |
271 | TRACE ("BFD_RELOC_386_TLS_LDM"); | |
55fd94b0 | 272 | return &elf_howto_table[R_386_TLS_LDM - R_386_ext_offset]; |
13ae64f3 | 273 | |
252b5132 RH |
274 | case BFD_RELOC_16: |
275 | TRACE ("BFD_RELOC_16"); | |
55fd94b0 | 276 | return &elf_howto_table[R_386_16 - R_386_ext_offset]; |
252b5132 RH |
277 | |
278 | case BFD_RELOC_16_PCREL: | |
279 | TRACE ("BFD_RELOC_16_PCREL"); | |
55fd94b0 | 280 | return &elf_howto_table[R_386_PC16 - R_386_ext_offset]; |
252b5132 RH |
281 | |
282 | case BFD_RELOC_8: | |
283 | TRACE ("BFD_RELOC_8"); | |
55fd94b0 | 284 | return &elf_howto_table[R_386_8 - R_386_ext_offset]; |
252b5132 RH |
285 | |
286 | case BFD_RELOC_8_PCREL: | |
287 | TRACE ("BFD_RELOC_8_PCREL"); | |
55fd94b0 | 288 | return &elf_howto_table[R_386_PC8 - R_386_ext_offset]; |
252b5132 | 289 | |
13ae64f3 JJ |
290 | /* Common with Sun TLS implementation. */ |
291 | case BFD_RELOC_386_TLS_LDO_32: | |
292 | TRACE ("BFD_RELOC_386_TLS_LDO_32"); | |
55fd94b0 | 293 | return &elf_howto_table[R_386_TLS_LDO_32 - R_386_tls_offset]; |
13ae64f3 JJ |
294 | |
295 | case BFD_RELOC_386_TLS_IE_32: | |
296 | TRACE ("BFD_RELOC_386_TLS_IE_32"); | |
55fd94b0 | 297 | return &elf_howto_table[R_386_TLS_IE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
298 | |
299 | case BFD_RELOC_386_TLS_LE_32: | |
300 | TRACE ("BFD_RELOC_386_TLS_LE_32"); | |
55fd94b0 | 301 | return &elf_howto_table[R_386_TLS_LE_32 - R_386_tls_offset]; |
13ae64f3 JJ |
302 | |
303 | case BFD_RELOC_386_TLS_DTPMOD32: | |
304 | TRACE ("BFD_RELOC_386_TLS_DTPMOD32"); | |
55fd94b0 | 305 | return &elf_howto_table[R_386_TLS_DTPMOD32 - R_386_tls_offset]; |
13ae64f3 JJ |
306 | |
307 | case BFD_RELOC_386_TLS_DTPOFF32: | |
308 | TRACE ("BFD_RELOC_386_TLS_DTPOFF32"); | |
55fd94b0 | 309 | return &elf_howto_table[R_386_TLS_DTPOFF32 - R_386_tls_offset]; |
13ae64f3 JJ |
310 | |
311 | case BFD_RELOC_386_TLS_TPOFF32: | |
312 | TRACE ("BFD_RELOC_386_TLS_TPOFF32"); | |
55fd94b0 | 313 | return &elf_howto_table[R_386_TLS_TPOFF32 - R_386_tls_offset]; |
13ae64f3 | 314 | |
67a4f2b7 AO |
315 | case BFD_RELOC_386_TLS_GOTDESC: |
316 | TRACE ("BFD_RELOC_386_TLS_GOTDESC"); | |
317 | return &elf_howto_table[R_386_TLS_GOTDESC - R_386_tls_offset]; | |
318 | ||
319 | case BFD_RELOC_386_TLS_DESC_CALL: | |
320 | TRACE ("BFD_RELOC_386_TLS_DESC_CALL"); | |
321 | return &elf_howto_table[R_386_TLS_DESC_CALL - R_386_tls_offset]; | |
322 | ||
323 | case BFD_RELOC_386_TLS_DESC: | |
324 | TRACE ("BFD_RELOC_386_TLS_DESC"); | |
325 | return &elf_howto_table[R_386_TLS_DESC - R_386_tls_offset]; | |
326 | ||
cbe950e9 L |
327 | case BFD_RELOC_386_IRELATIVE: |
328 | TRACE ("BFD_RELOC_386_IRELATIVE"); | |
2a750708 | 329 | return &elf_howto_table[R_386_IRELATIVE - R_386_tls_offset]; |
cbe950e9 | 330 | |
252b5132 RH |
331 | case BFD_RELOC_VTABLE_INHERIT: |
332 | TRACE ("BFD_RELOC_VTABLE_INHERIT"); | |
55fd94b0 | 333 | return &elf_howto_table[R_386_GNU_VTINHERIT - R_386_vt_offset]; |
252b5132 RH |
334 | |
335 | case BFD_RELOC_VTABLE_ENTRY: | |
336 | TRACE ("BFD_RELOC_VTABLE_ENTRY"); | |
55fd94b0 | 337 | return &elf_howto_table[R_386_GNU_VTENTRY - R_386_vt_offset]; |
252b5132 RH |
338 | |
339 | default: | |
340 | break; | |
341 | } | |
342 | ||
343 | TRACE ("Unknown"); | |
344 | return 0; | |
345 | } | |
346 | ||
157090f7 AM |
347 | static reloc_howto_type * |
348 | elf_i386_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
349 | const char *r_name) | |
350 | { | |
351 | unsigned int i; | |
352 | ||
353 | for (i = 0; i < sizeof (elf_howto_table) / sizeof (elf_howto_table[0]); i++) | |
354 | if (elf_howto_table[i].name != NULL | |
355 | && strcasecmp (elf_howto_table[i].name, r_name) == 0) | |
356 | return &elf_howto_table[i]; | |
357 | ||
358 | return NULL; | |
359 | } | |
360 | ||
142411ca L |
361 | static reloc_howto_type * |
362 | elf_i386_rtype_to_howto (bfd *abfd, unsigned r_type) | |
252b5132 | 363 | { |
dc47f327 AM |
364 | unsigned int indx; |
365 | ||
366 | if ((indx = r_type) >= R_386_standard | |
367 | && ((indx = r_type - R_386_ext_offset) - R_386_standard | |
368 | >= R_386_ext - R_386_standard) | |
13ae64f3 | 369 | && ((indx = r_type - R_386_tls_offset) - R_386_ext |
cbe950e9 L |
370 | >= R_386_irelative - R_386_ext) |
371 | && ((indx = r_type - R_386_vt_offset) - R_386_irelative | |
372 | >= R_386_vt - R_386_irelative)) | |
252b5132 | 373 | { |
d003868e AM |
374 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), |
375 | abfd, (int) r_type); | |
55fd94b0 | 376 | indx = R_386_NONE; |
252b5132 | 377 | } |
142411ca L |
378 | BFD_ASSERT (elf_howto_table [indx].type == r_type); |
379 | return &elf_howto_table[indx]; | |
380 | } | |
381 | ||
382 | static void | |
383 | elf_i386_info_to_howto_rel (bfd *abfd ATTRIBUTE_UNUSED, | |
384 | arelent *cache_ptr, | |
385 | Elf_Internal_Rela *dst) | |
386 | { | |
387 | unsigned int r_type = ELF32_R_TYPE (dst->r_info); | |
388 | cache_ptr->howto = elf_i386_rtype_to_howto (abfd, r_type); | |
252b5132 RH |
389 | } |
390 | ||
391 | /* Return whether a symbol name implies a local label. The UnixWare | |
392 | 2.1 cc generates temporary symbols that start with .X, so we | |
393 | recognize them here. FIXME: do other SVR4 compilers also use .X?. | |
394 | If so, we should move the .X recognition into | |
395 | _bfd_elf_is_local_label_name. */ | |
396 | ||
b34976b6 | 397 | static bfd_boolean |
55fd94b0 | 398 | elf_i386_is_local_label_name (bfd *abfd, const char *name) |
252b5132 RH |
399 | { |
400 | if (name[0] == '.' && name[1] == 'X') | |
b34976b6 | 401 | return TRUE; |
252b5132 RH |
402 | |
403 | return _bfd_elf_is_local_label_name (abfd, name); | |
404 | } | |
405 | \f | |
38701953 | 406 | /* Support for core dump NOTE sections. */ |
61adc1a4 | 407 | |
b34976b6 | 408 | static bfd_boolean |
55fd94b0 | 409 | elf_i386_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
38701953 AM |
410 | { |
411 | int offset; | |
eea6121a | 412 | size_t size; |
38701953 | 413 | |
61adc1a4 | 414 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 415 | { |
61adc1a4 NC |
416 | int pr_version = bfd_get_32 (abfd, note->descdata); |
417 | ||
418 | if (pr_version != 1) | |
419 | return FALSE; | |
420 | ||
421 | /* pr_cursig */ | |
422 | elf_tdata (abfd)->core_signal = bfd_get_32 (abfd, note->descdata + 20); | |
423 | ||
424 | /* pr_pid */ | |
261b8d08 | 425 | elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); |
61adc1a4 NC |
426 | |
427 | /* pr_reg */ | |
428 | offset = 28; | |
eea6121a | 429 | size = bfd_get_32 (abfd, note->descdata + 8); |
61adc1a4 NC |
430 | } |
431 | else | |
432 | { | |
433 | switch (note->descsz) | |
434 | { | |
435 | default: | |
436 | return FALSE; | |
38701953 | 437 | |
61adc1a4 NC |
438 | case 144: /* Linux/i386 */ |
439 | /* pr_cursig */ | |
440 | elf_tdata (abfd)->core_signal = bfd_get_16 (abfd, note->descdata + 12); | |
38701953 | 441 | |
61adc1a4 | 442 | /* pr_pid */ |
261b8d08 | 443 | elf_tdata (abfd)->core_lwpid = bfd_get_32 (abfd, note->descdata + 24); |
38701953 | 444 | |
61adc1a4 NC |
445 | /* pr_reg */ |
446 | offset = 72; | |
eea6121a | 447 | size = 68; |
38701953 | 448 | |
61adc1a4 NC |
449 | break; |
450 | } | |
38701953 AM |
451 | } |
452 | ||
453 | /* Make a ".reg/999" section. */ | |
454 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 455 | size, note->descpos + offset); |
38701953 AM |
456 | } |
457 | ||
b34976b6 | 458 | static bfd_boolean |
55fd94b0 | 459 | elf_i386_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
38701953 | 460 | { |
61adc1a4 | 461 | if (note->namesz == 8 && strcmp (note->namedata, "FreeBSD") == 0) |
38701953 | 462 | { |
61adc1a4 NC |
463 | int pr_version = bfd_get_32 (abfd, note->descdata); |
464 | ||
465 | if (pr_version != 1) | |
b34976b6 | 466 | return FALSE; |
38701953 | 467 | |
61adc1a4 NC |
468 | elf_tdata (abfd)->core_program |
469 | = _bfd_elfcore_strndup (abfd, note->descdata + 8, 17); | |
470 | elf_tdata (abfd)->core_command | |
471 | = _bfd_elfcore_strndup (abfd, note->descdata + 25, 81); | |
472 | } | |
473 | else | |
474 | { | |
475 | switch (note->descsz) | |
476 | { | |
477 | default: | |
478 | return FALSE; | |
479 | ||
480 | case 124: /* Linux/i386 elf_prpsinfo. */ | |
261b8d08 PA |
481 | elf_tdata (abfd)->core_pid |
482 | = bfd_get_32 (abfd, note->descdata + 12); | |
61adc1a4 NC |
483 | elf_tdata (abfd)->core_program |
484 | = _bfd_elfcore_strndup (abfd, note->descdata + 28, 16); | |
485 | elf_tdata (abfd)->core_command | |
486 | = _bfd_elfcore_strndup (abfd, note->descdata + 44, 80); | |
487 | } | |
38701953 AM |
488 | } |
489 | ||
490 | /* Note that for some reason, a spurious space is tacked | |
491 | onto the end of the args in some (at least one anyway) | |
492 | implementations, so strip it off if it exists. */ | |
38701953 AM |
493 | { |
494 | char *command = elf_tdata (abfd)->core_command; | |
495 | int n = strlen (command); | |
496 | ||
497 | if (0 < n && command[n - 1] == ' ') | |
498 | command[n - 1] = '\0'; | |
499 | } | |
500 | ||
b34976b6 | 501 | return TRUE; |
38701953 AM |
502 | } |
503 | \f | |
504 | /* Functions for the i386 ELF linker. | |
505 | ||
506 | In order to gain some understanding of code in this file without | |
507 | knowing all the intricate details of the linker, note the | |
508 | following: | |
509 | ||
510 | Functions named elf_i386_* are called by external routines, other | |
511 | functions are only called locally. elf_i386_* functions appear | |
512 | in this file more or less in the order in which they are called | |
513 | from external routines. eg. elf_i386_check_relocs is called | |
514 | early in the link process, elf_i386_finish_dynamic_sections is | |
515 | one of the last functions. */ | |
516 | ||
252b5132 RH |
517 | |
518 | /* The name of the dynamic interpreter. This is put in the .interp | |
519 | section. */ | |
520 | ||
521 | #define ELF_DYNAMIC_INTERPRETER "/usr/lib/libc.so.1" | |
522 | ||
a23b6845 AM |
523 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
524 | copying dynamic variables from a shared lib into an app's dynbss | |
525 | section, and instead use a dynamic relocation to point into the | |
526 | shared lib. */ | |
527 | #define ELIMINATE_COPY_RELOCS 1 | |
528 | ||
252b5132 RH |
529 | /* The size in bytes of an entry in the procedure linkage table. */ |
530 | ||
531 | #define PLT_ENTRY_SIZE 16 | |
532 | ||
533 | /* The first entry in an absolute procedure linkage table looks like | |
eac338cf PB |
534 | this. See the SVR4 ABI i386 supplement to see how this works. |
535 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 536 | |
eac338cf | 537 | static const bfd_byte elf_i386_plt0_entry[12] = |
252b5132 RH |
538 | { |
539 | 0xff, 0x35, /* pushl contents of address */ | |
540 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
541 | 0xff, 0x25, /* jmp indirect */ | |
eac338cf | 542 | 0, 0, 0, 0 /* replaced with address of .got + 8. */ |
252b5132 RH |
543 | }; |
544 | ||
545 | /* Subsequent entries in an absolute procedure linkage table look like | |
546 | this. */ | |
547 | ||
548 | static const bfd_byte elf_i386_plt_entry[PLT_ENTRY_SIZE] = | |
549 | { | |
550 | 0xff, 0x25, /* jmp indirect */ | |
551 | 0, 0, 0, 0, /* replaced with address of this symbol in .got. */ | |
552 | 0x68, /* pushl immediate */ | |
553 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
554 | 0xe9, /* jmp relative */ | |
555 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
556 | }; | |
557 | ||
eac338cf PB |
558 | /* The first entry in a PIC procedure linkage table look like this. |
559 | Will be padded to PLT_ENTRY_SIZE with htab->plt0_pad_byte. */ | |
252b5132 | 560 | |
eac338cf | 561 | static const bfd_byte elf_i386_pic_plt0_entry[12] = |
252b5132 RH |
562 | { |
563 | 0xff, 0xb3, 4, 0, 0, 0, /* pushl 4(%ebx) */ | |
eac338cf | 564 | 0xff, 0xa3, 8, 0, 0, 0 /* jmp *8(%ebx) */ |
252b5132 RH |
565 | }; |
566 | ||
567 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
568 | ||
569 | static const bfd_byte elf_i386_pic_plt_entry[PLT_ENTRY_SIZE] = | |
570 | { | |
571 | 0xff, 0xa3, /* jmp *offset(%ebx) */ | |
572 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
573 | 0x68, /* pushl immediate */ | |
574 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
575 | 0xe9, /* jmp relative */ | |
576 | 0, 0, 0, 0 /* replaced with offset to start of .plt. */ | |
577 | }; | |
578 | ||
e41b3a13 JJ |
579 | /* .eh_frame covering the .plt section. */ |
580 | ||
581 | static const bfd_byte elf_i386_eh_frame_plt[] = | |
582 | { | |
583 | #define PLT_CIE_LENGTH 20 | |
584 | #define PLT_FDE_LENGTH 36 | |
585 | #define PLT_FDE_START_OFFSET 4 + PLT_CIE_LENGTH + 8 | |
586 | #define PLT_FDE_LEN_OFFSET 4 + PLT_CIE_LENGTH + 12 | |
587 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
588 | 0, 0, 0, 0, /* CIE ID */ | |
589 | 1, /* CIE version */ | |
590 | 'z', 'R', 0, /* Augmentation string */ | |
591 | 1, /* Code alignment factor */ | |
592 | 0x7c, /* Data alignment factor */ | |
593 | 8, /* Return address column */ | |
594 | 1, /* Augmentation size */ | |
595 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
596 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
597 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
598 | DW_CFA_nop, DW_CFA_nop, | |
599 | ||
600 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
601 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
602 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
603 | 0, 0, 0, 0, /* .plt size goes here */ | |
604 | 0, /* Augmentation size */ | |
605 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
606 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
607 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
608 | DW_CFA_advance_loc + 10, /* DW_CFA_advance_loc: 10 to __PLT__+16 */ | |
609 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
610 | 11, /* Block length */ | |
611 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
612 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
613 | DW_OP_lit15, DW_OP_and, DW_OP_lit11, DW_OP_ge, | |
28ede8be | 614 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, |
e41b3a13 JJ |
615 | DW_CFA_nop, DW_CFA_nop, DW_CFA_nop, DW_CFA_nop |
616 | }; | |
617 | ||
25e762b9 RM |
618 | struct elf_i386_plt_layout |
619 | { | |
620 | /* The first entry in an absolute procedure linkage table looks like this. */ | |
621 | const bfd_byte *plt0_entry; | |
622 | unsigned int plt0_entry_size; | |
623 | ||
624 | /* Offsets into plt0_entry that are to be replaced with GOT[1] and GOT[2]. */ | |
625 | unsigned int plt0_got1_offset; | |
626 | unsigned int plt0_got2_offset; | |
627 | ||
628 | /* Later entries in an absolute procedure linkage table look like this. */ | |
629 | const bfd_byte *plt_entry; | |
630 | unsigned int plt_entry_size; | |
631 | ||
632 | /* Offsets into plt_entry that are to be replaced with... */ | |
633 | unsigned int plt_got_offset; /* ... address of this symbol in .got. */ | |
634 | unsigned int plt_reloc_offset; /* ... offset into relocation table. */ | |
635 | unsigned int plt_plt_offset; /* ... offset to start of .plt. */ | |
636 | ||
637 | /* Offset into plt_entry where the initial value of the GOT entry points. */ | |
638 | unsigned int plt_lazy_offset; | |
639 | ||
640 | /* The first entry in a PIC procedure linkage table looks like this. */ | |
641 | const bfd_byte *pic_plt0_entry; | |
642 | ||
643 | /* Subsequent entries in a PIC procedure linkage table look like this. */ | |
644 | const bfd_byte *pic_plt_entry; | |
645 | ||
646 | /* .eh_frame covering the .plt section. */ | |
647 | const bfd_byte *eh_frame_plt; | |
648 | unsigned int eh_frame_plt_size; | |
649 | }; | |
650 | ||
651 | #define GET_PLT_ENTRY_SIZE(abfd) \ | |
652 | get_elf_i386_backend_data (abfd)->plt->plt_entry_size | |
653 | ||
654 | /* These are the standard parameters. */ | |
655 | static const struct elf_i386_plt_layout elf_i386_plt = | |
656 | { | |
657 | elf_i386_plt0_entry, /* plt0_entry */ | |
658 | sizeof (elf_i386_plt0_entry), /* plt0_entry_size */ | |
659 | 2, /* plt0_got1_offset */ | |
660 | 8, /* plt0_got2_offset */ | |
661 | elf_i386_plt_entry, /* plt_entry */ | |
662 | PLT_ENTRY_SIZE, /* plt_entry_size */ | |
663 | 2, /* plt_got_offset */ | |
664 | 7, /* plt_reloc_offset */ | |
665 | 12, /* plt_plt_offset */ | |
666 | 6, /* plt_lazy_offset */ | |
667 | elf_i386_pic_plt0_entry, /* pic_plt0_entry */ | |
668 | elf_i386_pic_plt_entry, /* pic_plt_entry */ | |
669 | elf_i386_eh_frame_plt, /* eh_frame_plt */ | |
670 | sizeof (elf_i386_eh_frame_plt), /* eh_frame_plt_size */ | |
671 | }; | |
672 | \f | |
673 | ||
eac338cf PB |
674 | /* On VxWorks, the .rel.plt.unloaded section has absolute relocations |
675 | for the PLTResolve stub and then for each PLT entry. */ | |
676 | #define PLTRESOLVE_RELOCS_SHLIB 0 | |
677 | #define PLTRESOLVE_RELOCS 2 | |
678 | #define PLT_NON_JUMP_SLOT_RELOCS 2 | |
679 | ||
23209a78 RM |
680 | /* Architecture-specific backend data for i386. */ |
681 | ||
682 | struct elf_i386_backend_data | |
683 | { | |
25e762b9 RM |
684 | /* Parameters describing PLT generation. */ |
685 | const struct elf_i386_plt_layout *plt; | |
686 | ||
23209a78 RM |
687 | /* Value used to fill the unused bytes of the first PLT entry. */ |
688 | bfd_byte plt0_pad_byte; | |
689 | ||
690 | /* True if the target system is VxWorks. */ | |
691 | int is_vxworks; | |
692 | }; | |
693 | ||
694 | #define get_elf_i386_backend_data(abfd) \ | |
695 | ((const struct elf_i386_backend_data *) \ | |
696 | get_elf_backend_data (abfd)->arch_data) | |
697 | ||
698 | /* These are the standard parameters. */ | |
699 | static const struct elf_i386_backend_data elf_i386_arch_bed = | |
700 | { | |
25e762b9 | 701 | &elf_i386_plt, /* plt */ |
23209a78 RM |
702 | 0, /* plt0_pad_byte */ |
703 | 0, /* is_vxworks */ | |
704 | }; | |
705 | ||
706 | #define elf_backend_arch_data &elf_i386_arch_bed | |
707 | ||
252b5132 RH |
708 | /* i386 ELF linker hash entry. */ |
709 | ||
710 | struct elf_i386_link_hash_entry | |
711 | { | |
ebe50bae | 712 | struct elf_link_hash_entry elf; |
252b5132 | 713 | |
0c715baa | 714 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 715 | struct elf_dyn_relocs *dyn_relocs; |
13ae64f3 | 716 | |
37e55690 JJ |
717 | #define GOT_UNKNOWN 0 |
718 | #define GOT_NORMAL 1 | |
719 | #define GOT_TLS_GD 2 | |
720 | #define GOT_TLS_IE 4 | |
721 | #define GOT_TLS_IE_POS 5 | |
722 | #define GOT_TLS_IE_NEG 6 | |
723 | #define GOT_TLS_IE_BOTH 7 | |
67a4f2b7 AO |
724 | #define GOT_TLS_GDESC 8 |
725 | #define GOT_TLS_GD_BOTH_P(type) \ | |
726 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
727 | #define GOT_TLS_GD_P(type) \ | |
728 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
729 | #define GOT_TLS_GDESC_P(type) \ | |
730 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
731 | #define GOT_TLS_GD_ANY_P(type) \ | |
732 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
37e55690 | 733 | unsigned char tls_type; |
67a4f2b7 AO |
734 | |
735 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
736 | starting at the end of the jump table. */ | |
737 | bfd_vma tlsdesc_got; | |
13ae64f3 JJ |
738 | }; |
739 | ||
740 | #define elf_i386_hash_entry(ent) ((struct elf_i386_link_hash_entry *)(ent)) | |
741 | ||
742 | struct elf_i386_obj_tdata | |
743 | { | |
744 | struct elf_obj_tdata root; | |
745 | ||
746 | /* tls_type for each local got entry. */ | |
747 | char *local_got_tls_type; | |
67a4f2b7 AO |
748 | |
749 | /* GOTPLT entries for TLS descriptors. */ | |
750 | bfd_vma *local_tlsdesc_gotent; | |
252b5132 RH |
751 | }; |
752 | ||
13ae64f3 JJ |
753 | #define elf_i386_tdata(abfd) \ |
754 | ((struct elf_i386_obj_tdata *) (abfd)->tdata.any) | |
755 | ||
756 | #define elf_i386_local_got_tls_type(abfd) \ | |
757 | (elf_i386_tdata (abfd)->local_got_tls_type) | |
758 | ||
67a4f2b7 AO |
759 | #define elf_i386_local_tlsdesc_gotent(abfd) \ |
760 | (elf_i386_tdata (abfd)->local_tlsdesc_gotent) | |
761 | ||
0ffa91dd NC |
762 | #define is_i386_elf(bfd) \ |
763 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
764 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 765 | && elf_object_id (bfd) == I386_ELF_DATA) |
0ffa91dd | 766 | |
b34976b6 | 767 | static bfd_boolean |
55fd94b0 | 768 | elf_i386_mkobject (bfd *abfd) |
13ae64f3 | 769 | { |
0ffa91dd | 770 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_i386_obj_tdata), |
4dfe6ac6 | 771 | I386_ELF_DATA); |
13ae64f3 | 772 | } |
cedb70c5 | 773 | |
252b5132 RH |
774 | /* i386 ELF linker hash table. */ |
775 | ||
776 | struct elf_i386_link_hash_table | |
777 | { | |
ebe50bae | 778 | struct elf_link_hash_table elf; |
252b5132 | 779 | |
6725bdbf | 780 | /* Short-cuts to get to dynamic linker sections. */ |
6725bdbf AM |
781 | asection *sdynbss; |
782 | asection *srelbss; | |
e41b3a13 | 783 | asection *plt_eh_frame; |
9635fe29 | 784 | |
4dfe6ac6 NC |
785 | union |
786 | { | |
13ae64f3 JJ |
787 | bfd_signed_vma refcount; |
788 | bfd_vma offset; | |
789 | } tls_ldm_got; | |
790 | ||
67a4f2b7 AO |
791 | /* The amount of space used by the reserved portion of the sgotplt |
792 | section, plus whatever space is used by the jump slots. */ | |
793 | bfd_vma sgotplt_jump_table_size; | |
794 | ||
87d72d41 AM |
795 | /* Small local sym cache. */ |
796 | struct sym_cache sym_cache; | |
9f03412a AO |
797 | |
798 | /* _TLS_MODULE_BASE_ symbol. */ | |
799 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
800 | |
801 | /* Used by local STT_GNU_IFUNC symbols. */ | |
802 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
803 | void * loc_hash_memory; |
804 | ||
805 | /* The (unloaded but important) .rel.plt.unloaded section on VxWorks. */ | |
806 | asection *srelplt2; | |
807 | ||
4dfe6ac6 NC |
808 | /* The index of the next unused R_386_TLS_DESC slot in .rel.plt. */ |
809 | bfd_vma next_tls_desc_index; | |
e1f98742 L |
810 | |
811 | /* The index of the next unused R_386_JUMP_SLOT slot in .rel.plt. */ | |
812 | bfd_vma next_jump_slot_index; | |
813 | ||
814 | /* The index of the next unused R_386_IRELATIVE slot in .rel.plt. */ | |
815 | bfd_vma next_irelative_index; | |
6725bdbf | 816 | }; |
252b5132 RH |
817 | |
818 | /* Get the i386 ELF linker hash table from a link_info structure. */ | |
819 | ||
820 | #define elf_i386_hash_table(p) \ | |
4dfe6ac6 NC |
821 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
822 | == I386_ELF_DATA ? ((struct elf_i386_link_hash_table *) ((p)->hash)) : NULL) | |
252b5132 | 823 | |
67a4f2b7 | 824 | #define elf_i386_compute_jump_table_size(htab) \ |
5ae0bfb6 | 825 | ((htab)->next_tls_desc_index * 4) |
67a4f2b7 | 826 | |
252b5132 RH |
827 | /* Create an entry in an i386 ELF linker hash table. */ |
828 | ||
829 | static struct bfd_hash_entry * | |
eb4ff4d6 L |
830 | elf_i386_link_hash_newfunc (struct bfd_hash_entry *entry, |
831 | struct bfd_hash_table *table, | |
832 | const char *string) | |
252b5132 | 833 | { |
252b5132 RH |
834 | /* Allocate the structure if it has not already been allocated by a |
835 | subclass. */ | |
ebe50bae AM |
836 | if (entry == NULL) |
837 | { | |
a50b1753 NC |
838 | entry = (struct bfd_hash_entry *) |
839 | bfd_hash_allocate (table, sizeof (struct elf_i386_link_hash_entry)); | |
ebe50bae AM |
840 | if (entry == NULL) |
841 | return entry; | |
842 | } | |
252b5132 RH |
843 | |
844 | /* Call the allocation method of the superclass. */ | |
ebe50bae AM |
845 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
846 | if (entry != NULL) | |
252b5132 | 847 | { |
ebe50bae AM |
848 | struct elf_i386_link_hash_entry *eh; |
849 | ||
850 | eh = (struct elf_i386_link_hash_entry *) entry; | |
851 | eh->dyn_relocs = NULL; | |
13ae64f3 | 852 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 853 | eh->tlsdesc_got = (bfd_vma) -1; |
252b5132 RH |
854 | } |
855 | ||
ebe50bae | 856 | return entry; |
252b5132 RH |
857 | } |
858 | ||
c25bc9fc L |
859 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
860 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
861 | as global symbol. We reuse indx and dynstr_index for local symbol | |
862 | hash since they aren't used by global symbols in this backend. */ | |
863 | ||
864 | static hashval_t | |
865 | elf_i386_local_htab_hash (const void *ptr) | |
866 | { | |
867 | struct elf_link_hash_entry *h | |
868 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 869 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
870 | } |
871 | ||
872 | /* Compare local hash entries. */ | |
873 | ||
874 | static int | |
875 | elf_i386_local_htab_eq (const void *ptr1, const void *ptr2) | |
876 | { | |
877 | struct elf_link_hash_entry *h1 | |
878 | = (struct elf_link_hash_entry *) ptr1; | |
879 | struct elf_link_hash_entry *h2 | |
880 | = (struct elf_link_hash_entry *) ptr2; | |
881 | ||
882 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
883 | } | |
884 | ||
885 | /* Find and/or create a hash entry for local symbol. */ | |
886 | ||
887 | static struct elf_link_hash_entry * | |
888 | elf_i386_get_local_sym_hash (struct elf_i386_link_hash_table *htab, | |
889 | bfd *abfd, const Elf_Internal_Rela *rel, | |
890 | bfd_boolean create) | |
891 | { | |
892 | struct elf_i386_link_hash_entry e, *ret; | |
893 | asection *sec = abfd->sections; | |
d2149d72 L |
894 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
895 | ELF32_R_SYM (rel->r_info)); | |
c25bc9fc L |
896 | void **slot; |
897 | ||
898 | e.elf.indx = sec->id; | |
899 | e.elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
900 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, | |
901 | create ? INSERT : NO_INSERT); | |
902 | ||
903 | if (!slot) | |
904 | return NULL; | |
905 | ||
906 | if (*slot) | |
907 | { | |
908 | ret = (struct elf_i386_link_hash_entry *) *slot; | |
909 | return &ret->elf; | |
910 | } | |
911 | ||
912 | ret = (struct elf_i386_link_hash_entry *) | |
913 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, | |
914 | sizeof (struct elf_i386_link_hash_entry)); | |
915 | if (ret) | |
916 | { | |
917 | memset (ret, 0, sizeof (*ret)); | |
918 | ret->elf.indx = sec->id; | |
919 | ret->elf.dynstr_index = ELF32_R_SYM (rel->r_info); | |
920 | ret->elf.dynindx = -1; | |
c25bc9fc L |
921 | *slot = ret; |
922 | } | |
923 | return &ret->elf; | |
924 | } | |
925 | ||
252b5132 RH |
926 | /* Create an i386 ELF linker hash table. */ |
927 | ||
928 | static struct bfd_link_hash_table * | |
55fd94b0 | 929 | elf_i386_link_hash_table_create (bfd *abfd) |
252b5132 RH |
930 | { |
931 | struct elf_i386_link_hash_table *ret; | |
dc810e39 | 932 | bfd_size_type amt = sizeof (struct elf_i386_link_hash_table); |
252b5132 | 933 | |
a50b1753 | 934 | ret = (struct elf_i386_link_hash_table *) bfd_malloc (amt); |
ebe50bae | 935 | if (ret == NULL) |
252b5132 RH |
936 | return NULL; |
937 | ||
eb4ff4d6 L |
938 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
939 | elf_i386_link_hash_newfunc, | |
4dfe6ac6 NC |
940 | sizeof (struct elf_i386_link_hash_entry), |
941 | I386_ELF_DATA)) | |
252b5132 | 942 | { |
e2d34d7d | 943 | free (ret); |
252b5132 RH |
944 | return NULL; |
945 | } | |
946 | ||
6725bdbf AM |
947 | ret->sdynbss = NULL; |
948 | ret->srelbss = NULL; | |
332ce62b | 949 | ret->plt_eh_frame = NULL; |
7a624474 | 950 | ret->tls_ldm_got.refcount = 0; |
5ae0bfb6 | 951 | ret->next_tls_desc_index = 0; |
67a4f2b7 | 952 | ret->sgotplt_jump_table_size = 0; |
87d72d41 | 953 | ret->sym_cache.abfd = NULL; |
eac338cf | 954 | ret->srelplt2 = NULL; |
9f03412a | 955 | ret->tls_module_base = NULL; |
e1f98742 L |
956 | ret->next_jump_slot_index = 0; |
957 | ret->next_irelative_index = 0; | |
6725bdbf | 958 | |
c25bc9fc L |
959 | ret->loc_hash_table = htab_try_create (1024, |
960 | elf_i386_local_htab_hash, | |
961 | elf_i386_local_htab_eq, | |
962 | NULL); | |
963 | ret->loc_hash_memory = objalloc_create (); | |
964 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
965 | { | |
966 | free (ret); | |
967 | return NULL; | |
968 | } | |
969 | ||
ebe50bae | 970 | return &ret->elf.root; |
252b5132 RH |
971 | } |
972 | ||
c25bc9fc L |
973 | /* Destroy an i386 ELF linker hash table. */ |
974 | ||
975 | static void | |
976 | elf_i386_link_hash_table_free (struct bfd_link_hash_table *hash) | |
977 | { | |
978 | struct elf_i386_link_hash_table *htab | |
979 | = (struct elf_i386_link_hash_table *) hash; | |
980 | ||
981 | if (htab->loc_hash_table) | |
982 | htab_delete (htab->loc_hash_table); | |
983 | if (htab->loc_hash_memory) | |
984 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
985 | _bfd_generic_link_hash_table_free (hash); | |
986 | } | |
987 | ||
6725bdbf AM |
988 | /* Create .plt, .rel.plt, .got, .got.plt, .rel.got, .dynbss, and |
989 | .rel.bss sections in DYNOBJ, and set up shortcuts to them in our | |
990 | hash table. */ | |
991 | ||
b34976b6 | 992 | static bfd_boolean |
55fd94b0 | 993 | elf_i386_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
6725bdbf AM |
994 | { |
995 | struct elf_i386_link_hash_table *htab; | |
996 | ||
6725bdbf | 997 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 998 | return FALSE; |
6725bdbf | 999 | |
6de2ae4a | 1000 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1001 | if (htab == NULL) |
1002 | return FALSE; | |
1003 | ||
3d4d4302 | 1004 | htab->sdynbss = bfd_get_linker_section (dynobj, ".dynbss"); |
6725bdbf | 1005 | if (!info->shared) |
3d4d4302 | 1006 | htab->srelbss = bfd_get_linker_section (dynobj, ".rel.bss"); |
6725bdbf | 1007 | |
6de2ae4a | 1008 | if (!htab->sdynbss |
6725bdbf AM |
1009 | || (!info->shared && !htab->srelbss)) |
1010 | abort (); | |
1011 | ||
23209a78 | 1012 | if (get_elf_i386_backend_data (dynobj)->is_vxworks |
6de2ae4a L |
1013 | && !elf_vxworks_create_dynamic_sections (dynobj, info, |
1014 | &htab->srelplt2)) | |
711de32c | 1015 | return FALSE; |
eac338cf | 1016 | |
e41b3a13 | 1017 | if (!info->no_ld_generated_unwind_info |
2fe0fd06 | 1018 | && htab->plt_eh_frame == NULL |
e4de50d4 | 1019 | && htab->elf.splt != NULL) |
e41b3a13 | 1020 | { |
bbf96e4e L |
1021 | flagword flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY |
1022 | | SEC_HAS_CONTENTS | SEC_IN_MEMORY | |
1023 | | SEC_LINKER_CREATED); | |
e41b3a13 | 1024 | htab->plt_eh_frame |
bbf96e4e | 1025 | = bfd_make_section_anyway_with_flags (dynobj, ".eh_frame", flags); |
e41b3a13 JJ |
1026 | if (htab->plt_eh_frame == NULL |
1027 | || !bfd_set_section_alignment (dynobj, htab->plt_eh_frame, 2)) | |
1028 | return FALSE; | |
e41b3a13 JJ |
1029 | } |
1030 | ||
b34976b6 | 1031 | return TRUE; |
6725bdbf AM |
1032 | } |
1033 | ||
ebe50bae AM |
1034 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ |
1035 | ||
51b64d56 | 1036 | static void |
fcfa13d2 | 1037 | elf_i386_copy_indirect_symbol (struct bfd_link_info *info, |
55fd94b0 AM |
1038 | struct elf_link_hash_entry *dir, |
1039 | struct elf_link_hash_entry *ind) | |
ebe50bae AM |
1040 | { |
1041 | struct elf_i386_link_hash_entry *edir, *eind; | |
1042 | ||
1043 | edir = (struct elf_i386_link_hash_entry *) dir; | |
1044 | eind = (struct elf_i386_link_hash_entry *) ind; | |
1045 | ||
bbd7ec4a | 1046 | if (eind->dyn_relocs != NULL) |
ebe50bae | 1047 | { |
bbd7ec4a AM |
1048 | if (edir->dyn_relocs != NULL) |
1049 | { | |
e03a8ed8 L |
1050 | struct elf_dyn_relocs **pp; |
1051 | struct elf_dyn_relocs *p; | |
bbd7ec4a | 1052 | |
fcfa13d2 | 1053 | /* Add reloc counts against the indirect sym to the direct sym |
bbd7ec4a AM |
1054 | list. Merge any entries against the same section. */ |
1055 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
1056 | { | |
e03a8ed8 | 1057 | struct elf_dyn_relocs *q; |
bbd7ec4a AM |
1058 | |
1059 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
1060 | if (q->sec == p->sec) | |
1061 | { | |
1062 | q->pc_count += p->pc_count; | |
1063 | q->count += p->count; | |
1064 | *pp = p->next; | |
1065 | break; | |
1066 | } | |
1067 | if (q == NULL) | |
1068 | pp = &p->next; | |
1069 | } | |
1070 | *pp = edir->dyn_relocs; | |
1071 | } | |
1072 | ||
ebe50bae AM |
1073 | edir->dyn_relocs = eind->dyn_relocs; |
1074 | eind->dyn_relocs = NULL; | |
1075 | } | |
ebe50bae | 1076 | |
cd67d266 JJ |
1077 | if (ind->root.type == bfd_link_hash_indirect |
1078 | && dir->got.refcount <= 0) | |
1079 | { | |
1080 | edir->tls_type = eind->tls_type; | |
1081 | eind->tls_type = GOT_UNKNOWN; | |
1082 | } | |
81848ca0 AM |
1083 | |
1084 | if (ELIMINATE_COPY_RELOCS | |
1085 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
1086 | && dir->dynamic_adjusted) |
1087 | { | |
1088 | /* If called to transfer flags for a weakdef during processing | |
1089 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
1090 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
1091 | dir->ref_dynamic |= ind->ref_dynamic; | |
1092 | dir->ref_regular |= ind->ref_regular; | |
1093 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
1094 | dir->needs_plt |= ind->needs_plt; | |
1095 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
1096 | } | |
81848ca0 | 1097 | else |
fcfa13d2 | 1098 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
ebe50bae AM |
1099 | } |
1100 | ||
142411ca L |
1101 | /* Return TRUE if the TLS access code sequence support transition |
1102 | from R_TYPE. */ | |
1103 | ||
1104 | static bfd_boolean | |
1105 | elf_i386_check_tls_transition (bfd *abfd, asection *sec, | |
1106 | bfd_byte *contents, | |
1107 | Elf_Internal_Shdr *symtab_hdr, | |
1108 | struct elf_link_hash_entry **sym_hashes, | |
1109 | unsigned int r_type, | |
1110 | const Elf_Internal_Rela *rel, | |
1111 | const Elf_Internal_Rela *relend) | |
13ae64f3 | 1112 | { |
142411ca L |
1113 | unsigned int val, type; |
1114 | unsigned long r_symndx; | |
1115 | struct elf_link_hash_entry *h; | |
1116 | bfd_vma offset; | |
1117 | ||
1118 | /* Get the section contents. */ | |
1119 | if (contents == NULL) | |
1120 | { | |
1121 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
1122 | contents = elf_section_data (sec)->this_hdr.contents; | |
1123 | else | |
1124 | { | |
1125 | /* FIXME: How to better handle error condition? */ | |
1126 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
1127 | return FALSE; | |
13ae64f3 | 1128 | |
142411ca L |
1129 | /* Cache the section contents for elf_link_input_bfd. */ |
1130 | elf_section_data (sec)->this_hdr.contents = contents; | |
1131 | } | |
1132 | } | |
1133 | ||
1134 | offset = rel->r_offset; | |
13ae64f3 | 1135 | switch (r_type) |
142411ca L |
1136 | { |
1137 | case R_386_TLS_GD: | |
1138 | case R_386_TLS_LDM: | |
1139 | if (offset < 2 || (rel + 1) >= relend) | |
1140 | return FALSE; | |
1141 | ||
1142 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1143 | if (r_type == R_386_TLS_GD) | |
1144 | { | |
09e8c3bf | 1145 | /* Check transition from GD access model. Only |
142411ca L |
1146 | leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr |
1147 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop | |
1148 | can transit to different access model. */ | |
1149 | if ((offset + 10) > sec->size || | |
1150 | (type != 0x8d && type != 0x04)) | |
1151 | return FALSE; | |
1152 | ||
1153 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1154 | if (type == 0x04) | |
1155 | { | |
1156 | /* leal foo@tlsgd(,%reg,1), %eax; call ___tls_get_addr */ | |
1157 | if (offset < 3) | |
1158 | return FALSE; | |
1159 | ||
1160 | if (bfd_get_8 (abfd, contents + offset - 3) != 0x8d) | |
1161 | return FALSE; | |
1162 | ||
1163 | if ((val & 0xc7) != 0x05 || val == (4 << 3)) | |
1164 | return FALSE; | |
1165 | } | |
1166 | else | |
1167 | { | |
1168 | /* leal foo@tlsgd(%reg), %eax; call ___tls_get_addr; nop */ | |
1169 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1170 | return FALSE; | |
1171 | ||
1172 | if (bfd_get_8 (abfd, contents + offset + 9) != 0x90) | |
1173 | return FALSE; | |
1174 | } | |
1175 | } | |
1176 | else | |
1177 | { | |
1178 | /* Check transition from LD access model. Only | |
1179 | leal foo@tlsgd(%reg), %eax; call ___tls_get_addr | |
1180 | can transit to different access model. */ | |
1181 | if (type != 0x8d || (offset + 9) > sec->size) | |
1182 | return FALSE; | |
1183 | ||
1184 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1185 | if ((val & 0xf8) != 0x80 || (val & 7) == 4) | |
1186 | return FALSE; | |
1187 | } | |
1188 | ||
1189 | if (bfd_get_8 (abfd, contents + offset + 4) != 0xe8) | |
1190 | return FALSE; | |
1191 | ||
1192 | r_symndx = ELF32_R_SYM (rel[1].r_info); | |
1193 | if (r_symndx < symtab_hdr->sh_info) | |
1194 | return FALSE; | |
1195 | ||
1196 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
1197 | /* Use strncmp to check ___tls_get_addr since ___tls_get_addr |
1198 | may be versioned. */ | |
142411ca L |
1199 | return (h != NULL |
1200 | && h->root.root.string != NULL | |
1201 | && (ELF32_R_TYPE (rel[1].r_info) == R_386_PC32 | |
1202 | || ELF32_R_TYPE (rel[1].r_info) == R_386_PLT32) | |
c4fb387b L |
1203 | && (strncmp (h->root.root.string, "___tls_get_addr", |
1204 | 15) == 0)); | |
142411ca L |
1205 | |
1206 | case R_386_TLS_IE: | |
1207 | /* Check transition from IE access model: | |
1208 | movl foo@indntpoff(%rip), %eax | |
1209 | movl foo@indntpoff(%rip), %reg | |
1210 | addl foo@indntpoff(%rip), %reg | |
1211 | */ | |
1212 | ||
1213 | if (offset < 1 || (offset + 4) > sec->size) | |
1214 | return FALSE; | |
1215 | ||
1216 | /* Check "movl foo@tpoff(%rip), %eax" first. */ | |
1217 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1218 | if (val == 0xa1) | |
1219 | return TRUE; | |
1220 | ||
1221 | if (offset < 2) | |
1222 | return FALSE; | |
1223 | ||
1224 | /* Check movl|addl foo@tpoff(%rip), %reg. */ | |
1225 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1226 | return ((type == 0x8b || type == 0x03) | |
1227 | && (val & 0xc7) == 0x05); | |
1228 | ||
1229 | case R_386_TLS_GOTIE: | |
1230 | case R_386_TLS_IE_32: | |
1231 | /* Check transition from {IE_32,GOTIE} access model: | |
1232 | subl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1233 | movl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1234 | addl foo@{tpoff,gontoff}(%reg1), %reg2 | |
1235 | */ | |
1236 | ||
1237 | if (offset < 2 || (offset + 4) > sec->size) | |
1238 | return FALSE; | |
1239 | ||
1240 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1241 | if ((val & 0xc0) != 0x80 || (val & 7) == 4) | |
1242 | return FALSE; | |
1243 | ||
1244 | type = bfd_get_8 (abfd, contents + offset - 2); | |
1245 | return type == 0x8b || type == 0x2b || type == 0x03; | |
1246 | ||
1247 | case R_386_TLS_GOTDESC: | |
1248 | /* Check transition from GDesc access model: | |
1249 | leal x@tlsdesc(%ebx), %eax | |
1250 | ||
1251 | Make sure it's a leal adding ebx to a 32-bit offset | |
1252 | into any register, although it's probably almost always | |
1253 | going to be eax. */ | |
1254 | ||
1255 | if (offset < 2 || (offset + 4) > sec->size) | |
1256 | return FALSE; | |
1257 | ||
1258 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
1259 | return FALSE; | |
1260 | ||
1261 | val = bfd_get_8 (abfd, contents + offset - 1); | |
1262 | return (val & 0xc7) == 0x83; | |
1263 | ||
1264 | case R_386_TLS_DESC_CALL: | |
1265 | /* Check transition from GDesc access model: | |
1266 | call *x@tlsdesc(%rax) | |
1267 | */ | |
1268 | if (offset + 2 <= sec->size) | |
1269 | { | |
1270 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
fa289a5f AM |
1271 | static const unsigned char call[] = { 0xff, 0x10 }; |
1272 | return memcmp (contents + offset, call, 2) == 0; | |
142411ca L |
1273 | } |
1274 | ||
1275 | return FALSE; | |
1276 | ||
1277 | default: | |
1278 | abort (); | |
1279 | } | |
1280 | } | |
1281 | ||
1282 | /* Return TRUE if the TLS access transition is OK or no transition | |
1283 | will be performed. Update R_TYPE if there is a transition. */ | |
1284 | ||
1285 | static bfd_boolean | |
1286 | elf_i386_tls_transition (struct bfd_link_info *info, bfd *abfd, | |
1287 | asection *sec, bfd_byte *contents, | |
1288 | Elf_Internal_Shdr *symtab_hdr, | |
1289 | struct elf_link_hash_entry **sym_hashes, | |
1290 | unsigned int *r_type, int tls_type, | |
1291 | const Elf_Internal_Rela *rel, | |
1292 | const Elf_Internal_Rela *relend, | |
4c544807 L |
1293 | struct elf_link_hash_entry *h, |
1294 | unsigned long r_symndx) | |
142411ca L |
1295 | { |
1296 | unsigned int from_type = *r_type; | |
1297 | unsigned int to_type = from_type; | |
1298 | bfd_boolean check = TRUE; | |
1299 | ||
bb1cb422 L |
1300 | /* Skip TLS transition for functions. */ |
1301 | if (h != NULL | |
1302 | && (h->type == STT_FUNC | |
1303 | || h->type == STT_GNU_IFUNC)) | |
1304 | return TRUE; | |
1305 | ||
142411ca | 1306 | switch (from_type) |
13ae64f3 JJ |
1307 | { |
1308 | case R_386_TLS_GD: | |
67a4f2b7 AO |
1309 | case R_386_TLS_GOTDESC: |
1310 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 1311 | case R_386_TLS_IE_32: |
37e55690 JJ |
1312 | case R_386_TLS_IE: |
1313 | case R_386_TLS_GOTIE: | |
1d85728f | 1314 | if (info->executable) |
142411ca L |
1315 | { |
1316 | if (h == NULL) | |
1317 | to_type = R_386_TLS_LE_32; | |
1318 | else if (from_type != R_386_TLS_IE | |
1319 | && from_type != R_386_TLS_GOTIE) | |
1320 | to_type = R_386_TLS_IE_32; | |
1321 | } | |
1322 | ||
1323 | /* When we are called from elf_i386_relocate_section, CONTENTS | |
1324 | isn't NULL and there may be additional transitions based on | |
1325 | TLS_TYPE. */ | |
1326 | if (contents != NULL) | |
1327 | { | |
1328 | unsigned int new_to_type = to_type; | |
1329 | ||
1d85728f | 1330 | if (info->executable |
142411ca L |
1331 | && h != NULL |
1332 | && h->dynindx == -1 | |
1333 | && (tls_type & GOT_TLS_IE)) | |
1334 | new_to_type = R_386_TLS_LE_32; | |
1335 | ||
1336 | if (to_type == R_386_TLS_GD | |
1337 | || to_type == R_386_TLS_GOTDESC | |
1338 | || to_type == R_386_TLS_DESC_CALL) | |
1339 | { | |
1340 | if (tls_type == GOT_TLS_IE_POS) | |
1341 | new_to_type = R_386_TLS_GOTIE; | |
1342 | else if (tls_type & GOT_TLS_IE) | |
1343 | new_to_type = R_386_TLS_IE_32; | |
1344 | } | |
1345 | ||
1346 | /* We checked the transition before when we were called from | |
1347 | elf_i386_check_relocs. We only want to check the new | |
1348 | transition which hasn't been checked before. */ | |
1349 | check = new_to_type != to_type && from_type == to_type; | |
1350 | to_type = new_to_type; | |
1351 | } | |
1352 | ||
1353 | break; | |
1354 | ||
13ae64f3 | 1355 | case R_386_TLS_LDM: |
1d85728f | 1356 | if (info->executable) |
142411ca L |
1357 | to_type = R_386_TLS_LE_32; |
1358 | break; | |
1359 | ||
1360 | default: | |
1361 | return TRUE; | |
1362 | } | |
1363 | ||
1364 | /* Return TRUE if there is no transition. */ | |
1365 | if (from_type == to_type) | |
1366 | return TRUE; | |
1367 | ||
1368 | /* Check if the transition can be performed. */ | |
1369 | if (check | |
1370 | && ! elf_i386_check_tls_transition (abfd, sec, contents, | |
1371 | symtab_hdr, sym_hashes, | |
1372 | from_type, rel, relend)) | |
1373 | { | |
2f629d23 | 1374 | reloc_howto_type *from, *to; |
4c544807 | 1375 | const char *name; |
142411ca L |
1376 | |
1377 | from = elf_i386_rtype_to_howto (abfd, from_type); | |
1378 | to = elf_i386_rtype_to_howto (abfd, to_type); | |
1379 | ||
4c544807 L |
1380 | if (h) |
1381 | name = h->root.root.string; | |
1382 | else | |
1383 | { | |
4c544807 | 1384 | struct elf_i386_link_hash_table *htab; |
4dfe6ac6 | 1385 | |
4c544807 | 1386 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1387 | if (htab == NULL) |
1388 | name = "*unknown*"; | |
1389 | else | |
1390 | { | |
1391 | Elf_Internal_Sym *isym; | |
1392 | ||
1393 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1394 | abfd, r_symndx); | |
1395 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1396 | } | |
4c544807 L |
1397 | } |
1398 | ||
142411ca L |
1399 | (*_bfd_error_handler) |
1400 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1401 | "in section `%A' failed"), | |
4c544807 | 1402 | abfd, sec, from->name, to->name, name, |
142411ca L |
1403 | (unsigned long) rel->r_offset); |
1404 | bfd_set_error (bfd_error_bad_value); | |
1405 | return FALSE; | |
13ae64f3 JJ |
1406 | } |
1407 | ||
142411ca L |
1408 | *r_type = to_type; |
1409 | return TRUE; | |
13ae64f3 JJ |
1410 | } |
1411 | ||
252b5132 | 1412 | /* Look through the relocs for a section during the first phase, and |
0ac8d2ca AM |
1413 | calculate needed space in the global offset table, procedure linkage |
1414 | table, and dynamic reloc sections. */ | |
252b5132 | 1415 | |
b34976b6 | 1416 | static bfd_boolean |
55fd94b0 AM |
1417 | elf_i386_check_relocs (bfd *abfd, |
1418 | struct bfd_link_info *info, | |
1419 | asection *sec, | |
1420 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1421 | { |
6725bdbf | 1422 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
1423 | Elf_Internal_Shdr *symtab_hdr; |
1424 | struct elf_link_hash_entry **sym_hashes; | |
252b5132 RH |
1425 | const Elf_Internal_Rela *rel; |
1426 | const Elf_Internal_Rela *rel_end; | |
252b5132 RH |
1427 | asection *sreloc; |
1428 | ||
1049f94e | 1429 | if (info->relocatable) |
b34976b6 | 1430 | return TRUE; |
252b5132 | 1431 | |
0ffa91dd NC |
1432 | BFD_ASSERT (is_i386_elf (abfd)); |
1433 | ||
6725bdbf | 1434 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
1435 | if (htab == NULL) |
1436 | return FALSE; | |
1437 | ||
0ffa91dd | 1438 | symtab_hdr = &elf_symtab_hdr (abfd); |
252b5132 | 1439 | sym_hashes = elf_sym_hashes (abfd); |
252b5132 | 1440 | |
252b5132 RH |
1441 | sreloc = NULL; |
1442 | ||
1443 | rel_end = relocs + sec->reloc_count; | |
1444 | for (rel = relocs; rel < rel_end; rel++) | |
1445 | { | |
13ae64f3 | 1446 | unsigned int r_type; |
252b5132 RH |
1447 | unsigned long r_symndx; |
1448 | struct elf_link_hash_entry *h; | |
4c544807 L |
1449 | Elf_Internal_Sym *isym; |
1450 | const char *name; | |
252b5132 RH |
1451 | |
1452 | r_symndx = ELF32_R_SYM (rel->r_info); | |
13ae64f3 | 1453 | r_type = ELF32_R_TYPE (rel->r_info); |
252b5132 | 1454 | |
d9bc7a44 | 1455 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) |
f5f31454 | 1456 | { |
d003868e AM |
1457 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1458 | abfd, | |
8f615d07 | 1459 | r_symndx); |
b34976b6 | 1460 | return FALSE; |
f5f31454 L |
1461 | } |
1462 | ||
252b5132 | 1463 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1464 | { |
1465 | /* A local symbol. */ | |
c2e61a4e L |
1466 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1467 | abfd, r_symndx); | |
1468 | if (isym == NULL) | |
1469 | return FALSE; | |
c25bc9fc L |
1470 | |
1471 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
c25bc9fc L |
1472 | if (ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
1473 | { | |
9fff0c39 | 1474 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, TRUE); |
c25bc9fc | 1475 | if (h == NULL) |
c2e61a4e | 1476 | return FALSE; |
6bbec505 | 1477 | |
c25bc9fc L |
1478 | /* Fake a STT_GNU_IFUNC symbol. */ |
1479 | h->type = STT_GNU_IFUNC; | |
1480 | h->def_regular = 1; | |
1481 | h->ref_regular = 1; | |
1482 | h->forced_local = 1; | |
1483 | h->root.type = bfd_link_hash_defined; | |
1484 | } | |
1485 | else | |
1486 | h = NULL; | |
1487 | } | |
252b5132 | 1488 | else |
71cb9464 | 1489 | { |
4c544807 | 1490 | isym = NULL; |
71cb9464 L |
1491 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1492 | while (h->root.type == bfd_link_hash_indirect | |
1493 | || h->root.type == bfd_link_hash_warning) | |
1494 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1495 | } |
cbe950e9 | 1496 | |
c25bc9fc L |
1497 | if (h != NULL) |
1498 | { | |
cbe950e9 L |
1499 | /* Create the ifunc sections for static executables. If we |
1500 | never see an indirect function symbol nor we are building | |
1501 | a static executable, those sections will be empty and | |
1502 | won't appear in output. */ | |
1503 | switch (r_type) | |
1504 | { | |
1505 | default: | |
1506 | break; | |
1507 | ||
1508 | case R_386_32: | |
1509 | case R_386_PC32: | |
1510 | case R_386_PLT32: | |
1511 | case R_386_GOT32: | |
1512 | case R_386_GOTOFF: | |
9d4057ee AM |
1513 | if (htab->elf.dynobj == NULL) |
1514 | htab->elf.dynobj = abfd; | |
1515 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1516 | return FALSE; |
cbe950e9 L |
1517 | break; |
1518 | } | |
1519 | ||
1520 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
1521 | it here if it is defined in a non-shared object. */ | |
1522 | if (h->type == STT_GNU_IFUNC | |
1523 | && h->def_regular) | |
1524 | { | |
1525 | /* It is referenced by a non-shared object. */ | |
1526 | h->ref_regular = 1; | |
7ae26bc1 | 1527 | h->needs_plt = 1; |
6bbec505 | 1528 | |
cbe950e9 L |
1529 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1530 | h->plt.refcount += 1; | |
1531 | ||
1532 | /* STT_GNU_IFUNC needs dynamic sections. */ | |
1533 | if (htab->elf.dynobj == NULL) | |
1534 | htab->elf.dynobj = abfd; | |
1535 | ||
1536 | switch (r_type) | |
1537 | { | |
048cbda4 | 1538 | default: |
4c544807 L |
1539 | if (h->root.root.string) |
1540 | name = h->root.root.string; | |
1541 | else | |
1542 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1543 | NULL); | |
048cbda4 L |
1544 | (*_bfd_error_handler) |
1545 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
1546 | "symbol `%s' isn't handled by %s"), abfd, | |
1547 | elf_howto_table[r_type].name, | |
4c544807 | 1548 | name, __FUNCTION__); |
048cbda4 | 1549 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1550 | return FALSE; |
cbe950e9 L |
1551 | |
1552 | case R_386_32: | |
710ab287 L |
1553 | h->non_got_ref = 1; |
1554 | h->pointer_equality_needed = 1; | |
1555 | if (info->shared) | |
1556 | { | |
710ab287 L |
1557 | /* We must copy these reloc types into the |
1558 | output file. Create a reloc section in | |
1559 | dynobj and make room for this reloc. */ | |
e03a8ed8 L |
1560 | sreloc = _bfd_elf_create_ifunc_dyn_reloc |
1561 | (abfd, info, sec, sreloc, | |
1562 | &((struct elf_i386_link_hash_entry *) h)->dyn_relocs); | |
710ab287 | 1563 | if (sreloc == NULL) |
c2e61a4e | 1564 | return FALSE; |
710ab287 L |
1565 | } |
1566 | break; | |
1567 | ||
cbe950e9 L |
1568 | case R_386_PC32: |
1569 | h->non_got_ref = 1; | |
cbe950e9 L |
1570 | break; |
1571 | ||
1572 | case R_386_PLT32: | |
1573 | break; | |
1574 | ||
1575 | case R_386_GOT32: | |
1576 | case R_386_GOTOFF: | |
7afd84dc | 1577 | h->got.refcount += 1; |
6de2ae4a L |
1578 | if (htab->elf.sgot == NULL |
1579 | && !_bfd_elf_create_got_section (htab->elf.dynobj, | |
cbe950e9 | 1580 | info)) |
c2e61a4e | 1581 | return FALSE; |
cbe950e9 L |
1582 | break; |
1583 | } | |
1584 | ||
1585 | continue; | |
1586 | } | |
71cb9464 | 1587 | } |
252b5132 | 1588 | |
142411ca L |
1589 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1590 | symtab_hdr, sym_hashes, | |
1591 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1592 | rel, rel_end, h, r_symndx)) |
c2e61a4e | 1593 | return FALSE; |
13ae64f3 JJ |
1594 | |
1595 | switch (r_type) | |
252b5132 | 1596 | { |
37e55690 JJ |
1597 | case R_386_TLS_LDM: |
1598 | htab->tls_ldm_got.refcount += 1; | |
1599 | goto create_got; | |
1600 | ||
1601 | case R_386_PLT32: | |
1602 | /* This symbol requires a procedure linkage table entry. We | |
1603 | actually build the entry in adjust_dynamic_symbol, | |
1604 | because this might be a case of linking PIC code which is | |
1605 | never referenced by a dynamic object, in which case we | |
1606 | don't need to generate a procedure linkage table entry | |
1607 | after all. */ | |
1608 | ||
1609 | /* If this is a local symbol, we resolve it directly without | |
1610 | creating a procedure linkage table entry. */ | |
1611 | if (h == NULL) | |
1612 | continue; | |
1613 | ||
f5385ebf | 1614 | h->needs_plt = 1; |
37e55690 JJ |
1615 | h->plt.refcount += 1; |
1616 | break; | |
1617 | ||
13ae64f3 | 1618 | case R_386_TLS_IE_32: |
37e55690 JJ |
1619 | case R_386_TLS_IE: |
1620 | case R_386_TLS_GOTIE: | |
1d85728f | 1621 | if (!info->executable) |
13ae64f3 | 1622 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1623 | /* Fall through */ |
1624 | ||
252b5132 | 1625 | case R_386_GOT32: |
13ae64f3 | 1626 | case R_386_TLS_GD: |
67a4f2b7 AO |
1627 | case R_386_TLS_GOTDESC: |
1628 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1629 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1630 | { |
1631 | int tls_type, old_tls_type; | |
1632 | ||
1633 | switch (r_type) | |
1634 | { | |
1635 | default: | |
1636 | case R_386_GOT32: tls_type = GOT_NORMAL; break; | |
1637 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; | |
67a4f2b7 AO |
1638 | case R_386_TLS_GOTDESC: |
1639 | case R_386_TLS_DESC_CALL: | |
1640 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1641 | case R_386_TLS_IE_32: |
1642 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1643 | tls_type = GOT_TLS_IE_NEG; | |
1644 | else | |
ebcfb3c0 JJ |
1645 | /* If this is a GD->IE transition, we may use either of |
1646 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1647 | tls_type = GOT_TLS_IE; |
1648 | break; | |
1649 | case R_386_TLS_IE: | |
1650 | case R_386_TLS_GOTIE: | |
1651 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1652 | } |
1653 | ||
1654 | if (h != NULL) | |
1655 | { | |
1656 | h->got.refcount += 1; | |
1657 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
1658 | } | |
1659 | else | |
1660 | { | |
1661 | bfd_signed_vma *local_got_refcounts; | |
1662 | ||
1663 | /* This is a global offset table entry for a local symbol. */ | |
1664 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1665 | if (local_got_refcounts == NULL) | |
1666 | { | |
1667 | bfd_size_type size; | |
1668 | ||
1669 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1670 | size *= (sizeof (bfd_signed_vma) |
1671 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
1672 | local_got_refcounts = (bfd_signed_vma *) |
1673 | bfd_zalloc (abfd, size); | |
13ae64f3 | 1674 | if (local_got_refcounts == NULL) |
c2e61a4e | 1675 | return FALSE; |
13ae64f3 | 1676 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1677 | elf_i386_local_tlsdesc_gotent (abfd) |
1678 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 1679 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 1680 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1681 | } |
1682 | local_got_refcounts[r_symndx] += 1; | |
1683 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
1684 | } | |
1685 | ||
37e55690 JJ |
1686 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1687 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1688 | /* If a TLS symbol is accessed using IE at least once, |
1689 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1690 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1691 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1692 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1693 | { |
67a4f2b7 | 1694 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1695 | tls_type = old_tls_type; |
67a4f2b7 AO |
1696 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1697 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1698 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1699 | else |
1700 | { | |
09a24cbf | 1701 | if (h) |
4c544807 L |
1702 | name = h->root.root.string; |
1703 | else | |
1704 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1705 | NULL); | |
13ae64f3 | 1706 | (*_bfd_error_handler) |
d003868e | 1707 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1708 | "thread local symbol"), |
4c544807 | 1709 | abfd, name); |
c2e61a4e | 1710 | return FALSE; |
13ae64f3 JJ |
1711 | } |
1712 | } | |
1713 | ||
1714 | if (old_tls_type != tls_type) | |
1715 | { | |
1716 | if (h != NULL) | |
1717 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
1718 | else | |
1719 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1720 | } | |
1721 | } | |
0ac8d2ca AM |
1722 | /* Fall through */ |
1723 | ||
1724 | case R_386_GOTOFF: | |
1725 | case R_386_GOTPC: | |
13ae64f3 | 1726 | create_got: |
6de2ae4a | 1727 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
1728 | { |
1729 | if (htab->elf.dynobj == NULL) | |
1730 | htab->elf.dynobj = abfd; | |
6de2ae4a | 1731 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c2e61a4e | 1732 | return FALSE; |
0ac8d2ca | 1733 | } |
37e55690 JJ |
1734 | if (r_type != R_386_TLS_IE) |
1735 | break; | |
1736 | /* Fall through */ | |
252b5132 | 1737 | |
37e55690 JJ |
1738 | case R_386_TLS_LE_32: |
1739 | case R_386_TLS_LE: | |
1d85728f | 1740 | if (info->executable) |
37e55690 | 1741 | break; |
bffbf940 | 1742 | info->flags |= DF_STATIC_TLS; |
b34976b6 | 1743 | /* Fall through */ |
252b5132 RH |
1744 | |
1745 | case R_386_32: | |
1746 | case R_386_PC32: | |
710ab287 | 1747 | if (h != NULL && info->executable) |
6725bdbf | 1748 | { |
12d0ee4a | 1749 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1750 | need a copy reloc. We can't check reliably at this |
1751 | stage whether the section is read-only, as input | |
1752 | sections have not yet been mapped to output sections. | |
1753 | Tentatively set the flag for now, and correct in | |
1754 | adjust_dynamic_symbol. */ | |
f5385ebf | 1755 | h->non_got_ref = 1; |
12d0ee4a AM |
1756 | |
1757 | /* We may need a .plt entry if the function this reloc | |
1758 | refers to is in a shared lib. */ | |
51b64d56 | 1759 | h->plt.refcount += 1; |
c6585bbb | 1760 | if (r_type != R_386_PC32) |
f5385ebf | 1761 | h->pointer_equality_needed = 1; |
6725bdbf | 1762 | } |
7843f00e | 1763 | |
252b5132 | 1764 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1765 | against a global symbol, or a non PC relative reloc |
1766 | against a local symbol, then we need to copy the reloc | |
1767 | into the shared library. However, if we are linking with | |
1768 | -Bsymbolic, we do not need to copy a reloc against a | |
1769 | global symbol which is defined in an object we are | |
1770 | including in the link (i.e., DEF_REGULAR is set). At | |
1771 | this point we have not seen all the input files, so it is | |
1772 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1773 | later (it is never cleared). In case of a weak definition, |
1774 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1775 | a shared library. We account for that possibility below by |
1f655a09 L |
1776 | storing information in the relocs_copied field of the hash |
1777 | table entry. A similar situation occurs when creating | |
1778 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1779 | symbol local. |
56882138 | 1780 | |
12d0ee4a AM |
1781 | If on the other hand, we are creating an executable, we |
1782 | may need to keep relocations for symbols satisfied by a | |
1783 | dynamic library if we manage to avoid copy relocs for the | |
1784 | symbol. */ | |
1785 | if ((info->shared | |
1786 | && (sec->flags & SEC_ALLOC) != 0 | |
13ae64f3 | 1787 | && (r_type != R_386_PC32 |
12d0ee4a | 1788 | || (h != NULL |
55255dae | 1789 | && (! SYMBOLIC_BIND (info, h) |
12d0ee4a | 1790 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1791 | || !h->def_regular)))) |
a23b6845 AM |
1792 | || (ELIMINATE_COPY_RELOCS |
1793 | && !info->shared | |
12d0ee4a AM |
1794 | && (sec->flags & SEC_ALLOC) != 0 |
1795 | && h != NULL | |
12d0ee4a | 1796 | && (h->root.type == bfd_link_hash_defweak |
0f88be7a | 1797 | || !h->def_regular))) |
252b5132 | 1798 | { |
e03a8ed8 L |
1799 | struct elf_dyn_relocs *p; |
1800 | struct elf_dyn_relocs **head; | |
ec338859 | 1801 | |
12d0ee4a AM |
1802 | /* We must copy these reloc types into the output file. |
1803 | Create a reloc section in dynobj and make room for | |
1804 | this reloc. */ | |
252b5132 RH |
1805 | if (sreloc == NULL) |
1806 | { | |
0ac8d2ca AM |
1807 | if (htab->elf.dynobj == NULL) |
1808 | htab->elf.dynobj = abfd; | |
1809 | ||
83bac4b0 NC |
1810 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1811 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1812 | ||
252b5132 | 1813 | if (sreloc == NULL) |
c2e61a4e | 1814 | return FALSE; |
252b5132 RH |
1815 | } |
1816 | ||
0c715baa AM |
1817 | /* If this is a global symbol, we count the number of |
1818 | relocations we need for this symbol. */ | |
1819 | if (h != NULL) | |
252b5132 | 1820 | { |
ec338859 | 1821 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; |
0c715baa AM |
1822 | } |
1823 | else | |
1824 | { | |
ec338859 AM |
1825 | /* Track dynamic relocs needed for local syms too. |
1826 | We really need local syms available to do this | |
1827 | easily. Oh well. */ | |
87d72d41 | 1828 | void **vpp; |
ec338859 | 1829 | asection *s; |
87d72d41 AM |
1830 | |
1831 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1832 | abfd, r_symndx); | |
1833 | if (isym == NULL) | |
1834 | return FALSE; | |
1835 | ||
1836 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1837 | if (s == NULL) |
87d72d41 | 1838 | s = sec; |
ec338859 | 1839 | |
e81d3500 | 1840 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1841 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1842 | } |
1843 | ||
1844 | p = *head; | |
1845 | if (p == NULL || p->sec != sec) | |
1846 | { | |
1847 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
1848 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
1849 | amt); | |
ec338859 | 1850 | if (p == NULL) |
c2e61a4e | 1851 | return FALSE; |
ec338859 AM |
1852 | p->next = *head; |
1853 | *head = p; | |
1854 | p->sec = sec; | |
1855 | p->count = 0; | |
1856 | p->pc_count = 0; | |
252b5132 | 1857 | } |
ec338859 AM |
1858 | |
1859 | p->count += 1; | |
13ae64f3 | 1860 | if (r_type == R_386_PC32) |
ec338859 | 1861 | p->pc_count += 1; |
252b5132 | 1862 | } |
252b5132 RH |
1863 | break; |
1864 | ||
1865 | /* This relocation describes the C++ object vtable hierarchy. | |
1866 | Reconstruct it for later use during GC. */ | |
1867 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1868 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1869 | return FALSE; |
252b5132 RH |
1870 | break; |
1871 | ||
1872 | /* This relocation describes which C++ vtable entries are actually | |
1873 | used. Record for later use during GC. */ | |
1874 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1875 | BFD_ASSERT (h != NULL); |
1876 | if (h != NULL | |
1877 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c2e61a4e | 1878 | return FALSE; |
252b5132 RH |
1879 | break; |
1880 | ||
1881 | default: | |
1882 | break; | |
1883 | } | |
1884 | } | |
1885 | ||
b34976b6 | 1886 | return TRUE; |
252b5132 RH |
1887 | } |
1888 | ||
1889 | /* Return the section that should be marked against GC for a given | |
1890 | relocation. */ | |
1891 | ||
1892 | static asection * | |
55fd94b0 | 1893 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 1894 | struct bfd_link_info *info, |
55fd94b0 AM |
1895 | Elf_Internal_Rela *rel, |
1896 | struct elf_link_hash_entry *h, | |
1897 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1898 | { |
1899 | if (h != NULL) | |
07adf181 AM |
1900 | switch (ELF32_R_TYPE (rel->r_info)) |
1901 | { | |
1902 | case R_386_GNU_VTINHERIT: | |
1903 | case R_386_GNU_VTENTRY: | |
1904 | return NULL; | |
1905 | } | |
1906 | ||
1907 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1908 | } |
1909 | ||
1910 | /* Update the got entry reference counts for the section being removed. */ | |
1911 | ||
b34976b6 | 1912 | static bfd_boolean |
55fd94b0 AM |
1913 | elf_i386_gc_sweep_hook (bfd *abfd, |
1914 | struct bfd_link_info *info, | |
1915 | asection *sec, | |
1916 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1917 | { |
4dfe6ac6 | 1918 | struct elf_i386_link_hash_table *htab; |
dd5724d5 AM |
1919 | Elf_Internal_Shdr *symtab_hdr; |
1920 | struct elf_link_hash_entry **sym_hashes; | |
1921 | bfd_signed_vma *local_got_refcounts; | |
1922 | const Elf_Internal_Rela *rel, *relend; | |
dd5724d5 | 1923 | |
7dda2462 TG |
1924 | if (info->relocatable) |
1925 | return TRUE; | |
1926 | ||
4dfe6ac6 NC |
1927 | htab = elf_i386_hash_table (info); |
1928 | if (htab == NULL) | |
1929 | return FALSE; | |
1930 | ||
ec338859 | 1931 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1932 | |
0ffa91dd | 1933 | symtab_hdr = &elf_symtab_hdr (abfd); |
6725bdbf AM |
1934 | sym_hashes = elf_sym_hashes (abfd); |
1935 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1936 | |
1937 | relend = relocs + sec->reloc_count; | |
1938 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1939 | { |
1940 | unsigned long r_symndx; | |
1941 | unsigned int r_type; | |
1942 | struct elf_link_hash_entry *h = NULL; | |
37e55690 | 1943 | |
26e41594 AM |
1944 | r_symndx = ELF32_R_SYM (rel->r_info); |
1945 | if (r_symndx >= symtab_hdr->sh_info) | |
1946 | { | |
26e41594 | 1947 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1948 | while (h->root.type == bfd_link_hash_indirect |
1949 | || h->root.type == bfd_link_hash_warning) | |
1950 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1951 | } |
bb1cb422 L |
1952 | else |
1953 | { | |
1954 | /* A local symbol. */ | |
1955 | Elf_Internal_Sym *isym; | |
1956 | ||
1957 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1958 | abfd, r_symndx); | |
1959 | ||
1960 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1961 | if (isym != NULL | |
1962 | && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
1963 | { | |
1964 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE); | |
1965 | if (h == NULL) | |
1966 | abort (); | |
1967 | } | |
1968 | } | |
0c715baa | 1969 | |
3db2e7dd L |
1970 | if (h) |
1971 | { | |
1972 | struct elf_i386_link_hash_entry *eh; | |
1973 | struct elf_dyn_relocs **pp; | |
1974 | struct elf_dyn_relocs *p; | |
1975 | ||
1976 | eh = (struct elf_i386_link_hash_entry *) h; | |
1977 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1978 | if (p->sec == sec) | |
1979 | { | |
1980 | /* Everything must go for SEC. */ | |
1981 | *pp = p->next; | |
1982 | break; | |
1983 | } | |
1984 | } | |
1985 | ||
26e41594 | 1986 | r_type = ELF32_R_TYPE (rel->r_info); |
142411ca L |
1987 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1988 | symtab_hdr, sym_hashes, | |
1989 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1990 | rel, relend, h, r_symndx)) |
142411ca L |
1991 | return FALSE; |
1992 | ||
26e41594 AM |
1993 | switch (r_type) |
1994 | { | |
1995 | case R_386_TLS_LDM: | |
4dfe6ac6 NC |
1996 | if (htab->tls_ldm_got.refcount > 0) |
1997 | htab->tls_ldm_got.refcount -= 1; | |
26e41594 | 1998 | break; |
0c715baa | 1999 | |
26e41594 | 2000 | case R_386_TLS_GD: |
67a4f2b7 AO |
2001 | case R_386_TLS_GOTDESC: |
2002 | case R_386_TLS_DESC_CALL: | |
26e41594 AM |
2003 | case R_386_TLS_IE_32: |
2004 | case R_386_TLS_IE: | |
2005 | case R_386_TLS_GOTIE: | |
2006 | case R_386_GOT32: | |
2007 | if (h != NULL) | |
2008 | { | |
2009 | if (h->got.refcount > 0) | |
2010 | h->got.refcount -= 1; | |
bb1cb422 L |
2011 | if (h->type == STT_GNU_IFUNC) |
2012 | { | |
2013 | if (h->plt.refcount > 0) | |
2014 | h->plt.refcount -= 1; | |
2015 | } | |
26e41594 AM |
2016 | } |
2017 | else if (local_got_refcounts != NULL) | |
2018 | { | |
2019 | if (local_got_refcounts[r_symndx] > 0) | |
2020 | local_got_refcounts[r_symndx] -= 1; | |
2021 | } | |
2022 | break; | |
0c715baa | 2023 | |
26e41594 AM |
2024 | case R_386_32: |
2025 | case R_386_PC32: | |
3db2e7dd L |
2026 | if (info->shared |
2027 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
2028 | break; |
2029 | /* Fall through */ | |
6725bdbf | 2030 | |
26e41594 AM |
2031 | case R_386_PLT32: |
2032 | if (h != NULL) | |
2033 | { | |
2034 | if (h->plt.refcount > 0) | |
2035 | h->plt.refcount -= 1; | |
2036 | } | |
2037 | break; | |
dd5724d5 | 2038 | |
bb1cb422 L |
2039 | case R_386_GOTOFF: |
2040 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
2041 | { | |
2042 | if (h->got.refcount > 0) | |
2043 | h->got.refcount -= 1; | |
2044 | if (h->plt.refcount > 0) | |
2045 | h->plt.refcount -= 1; | |
2046 | } | |
2047 | break; | |
2048 | ||
26e41594 AM |
2049 | default: |
2050 | break; | |
2051 | } | |
2052 | } | |
252b5132 | 2053 | |
b34976b6 | 2054 | return TRUE; |
252b5132 RH |
2055 | } |
2056 | ||
2057 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
2058 | regular object. The current definition is in some section of the | |
2059 | dynamic object, but we're not including those sections. We have to | |
2060 | change the definition to something the rest of the link can | |
2061 | understand. */ | |
2062 | ||
b34976b6 | 2063 | static bfd_boolean |
55fd94b0 AM |
2064 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2065 | struct elf_link_hash_entry *h) | |
252b5132 | 2066 | { |
6725bdbf | 2067 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2068 | asection *s; |
252b5132 | 2069 | |
cbe950e9 L |
2070 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2071 | if (h->type == STT_GNU_IFUNC) | |
2072 | { | |
2073 | if (h->plt.refcount <= 0) | |
2074 | { | |
2075 | h->plt.offset = (bfd_vma) -1; | |
2076 | h->needs_plt = 0; | |
2077 | } | |
2078 | return TRUE; | |
2079 | } | |
2080 | ||
252b5132 RH |
2081 | /* If this is a function, put it in the procedure linkage table. We |
2082 | will fill in the contents of the procedure linkage table later, | |
2083 | when we know the address of the .got section. */ | |
2084 | if (h->type == STT_FUNC | |
f5385ebf | 2085 | || h->needs_plt) |
252b5132 | 2086 | { |
6725bdbf | 2087 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2088 | || SYMBOL_CALLS_LOCAL (info, h) |
2089 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2090 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2091 | { |
2092 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2093 | file, but the symbol was never referred to by a dynamic |
2094 | object, or if all references were garbage collected. In | |
2095 | such a case, we don't actually need to build a procedure | |
2096 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2097 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2098 | h->needs_plt = 0; |
252b5132 RH |
2099 | } |
2100 | ||
b34976b6 | 2101 | return TRUE; |
252b5132 | 2102 | } |
6725bdbf AM |
2103 | else |
2104 | /* It's possible that we incorrectly decided a .plt reloc was | |
2105 | needed for an R_386_PC32 reloc to a non-function sym in | |
2106 | check_relocs. We can't decide accurately between function and | |
2107 | non-function syms in check-relocs; Objects loaded later in | |
2108 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2109 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2110 | |
2111 | /* If this is a weak symbol, and there is a real definition, the | |
2112 | processor independent code will have arranged for us to see the | |
2113 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2114 | if (h->u.weakdef != NULL) |
252b5132 | 2115 | { |
f6e332e6 AM |
2116 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2117 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2118 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2119 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2120 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2121 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2122 | return TRUE; |
252b5132 RH |
2123 | } |
2124 | ||
2125 | /* This is a reference to a symbol defined by a dynamic object which | |
2126 | is not a function. */ | |
2127 | ||
2128 | /* If we are creating a shared library, we must presume that the | |
2129 | only references to the symbol are via the global offset table. | |
2130 | For such cases we need not do anything here; the relocations will | |
2131 | be handled correctly by relocate_section. */ | |
2132 | if (info->shared) | |
b34976b6 | 2133 | return TRUE; |
252b5132 | 2134 | |
7843f00e ILT |
2135 | /* If there are no references to this symbol that do not use the |
2136 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2137 | if (!h->non_got_ref) |
b34976b6 | 2138 | return TRUE; |
7843f00e | 2139 | |
8bd621d8 AM |
2140 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2141 | if (info->nocopyreloc) | |
2142 | { | |
f5385ebf | 2143 | h->non_got_ref = 0; |
b34976b6 | 2144 | return TRUE; |
8bd621d8 AM |
2145 | } |
2146 | ||
643796e3 | 2147 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2148 | if (htab == NULL) |
2149 | return FALSE; | |
643796e3 DJ |
2150 | |
2151 | /* If there aren't any dynamic relocs in read-only sections, then | |
2152 | we can keep the dynamic relocs and avoid the copy reloc. This | |
2153 | doesn't work on VxWorks, where we can not have dynamic relocations | |
2154 | (other than copy and jump slot relocations) in an executable. */ | |
23209a78 RM |
2155 | if (ELIMINATE_COPY_RELOCS |
2156 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) | |
ebe50bae | 2157 | { |
a23b6845 | 2158 | struct elf_i386_link_hash_entry * eh; |
e03a8ed8 | 2159 | struct elf_dyn_relocs *p; |
ebe50bae | 2160 | |
a23b6845 AM |
2161 | eh = (struct elf_i386_link_hash_entry *) h; |
2162 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2163 | { | |
2164 | s = p->sec->output_section; | |
2165 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2166 | break; | |
2167 | } | |
2168 | ||
a23b6845 AM |
2169 | if (p == NULL) |
2170 | { | |
f5385ebf | 2171 | h->non_got_ref = 0; |
a23b6845 AM |
2172 | return TRUE; |
2173 | } | |
ebe50bae AM |
2174 | } |
2175 | ||
252b5132 RH |
2176 | /* We must allocate the symbol in our .dynbss section, which will |
2177 | become part of the .bss section of the executable. There will be | |
2178 | an entry for this symbol in the .dynsym section. The dynamic | |
2179 | object will contain position independent code, so all references | |
2180 | from the dynamic object to this symbol will go through the global | |
2181 | offset table. The dynamic linker will use the .dynsym entry to | |
2182 | determine the address it must put in the global offset table, so | |
2183 | both the dynamic object and the regular object will refer to the | |
2184 | same memory location for the variable. */ | |
2185 | ||
252b5132 RH |
2186 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2187 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2188 | runtime process image. */ |
1d7e9d18 | 2189 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2190 | { |
eea6121a | 2191 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2192 | h->needs_copy = 1; |
252b5132 RH |
2193 | } |
2194 | ||
0ac8d2ca | 2195 | s = htab->sdynbss; |
252b5132 | 2196 | |
027297b7 | 2197 | return _bfd_elf_adjust_dynamic_copy (h, s); |
252b5132 RH |
2198 | } |
2199 | ||
6725bdbf | 2200 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2201 | dynamic relocs. */ |
6725bdbf | 2202 | |
b34976b6 | 2203 | static bfd_boolean |
eb4ff4d6 | 2204 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2205 | { |
2206 | struct bfd_link_info *info; | |
2207 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2208 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2209 | struct elf_dyn_relocs *p; |
25e762b9 | 2210 | unsigned plt_entry_size; |
6725bdbf | 2211 | |
e92d460e | 2212 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2213 | return TRUE; |
6725bdbf | 2214 | |
cbe950e9 | 2215 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2216 | |
6725bdbf AM |
2217 | info = (struct bfd_link_info *) inf; |
2218 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2219 | if (htab == NULL) |
2220 | return FALSE; | |
6725bdbf | 2221 | |
25e762b9 RM |
2222 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2223 | ||
cbe950e9 L |
2224 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2225 | here if it is defined and referenced in a non-shared object. */ | |
2226 | if (h->type == STT_GNU_IFUNC | |
2227 | && h->def_regular) | |
25e762b9 RM |
2228 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
2229 | plt_entry_size, 4); | |
cbe950e9 L |
2230 | else if (htab->elf.dynamic_sections_created |
2231 | && h->plt.refcount > 0) | |
6725bdbf | 2232 | { |
5a15f56f AM |
2233 | /* Make sure this symbol is output as a dynamic symbol. |
2234 | Undefined weak syms won't yet be marked as dynamic. */ | |
2235 | if (h->dynindx == -1 | |
f5385ebf | 2236 | && !h->forced_local) |
5a15f56f | 2237 | { |
c152c796 | 2238 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2239 | return FALSE; |
5a15f56f AM |
2240 | } |
2241 | ||
4e795f50 AM |
2242 | if (info->shared |
2243 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
ced53ee5 | 2244 | { |
6de2ae4a | 2245 | asection *s = htab->elf.splt; |
6725bdbf | 2246 | |
ced53ee5 AM |
2247 | /* If this is the first .plt entry, make room for the special |
2248 | first entry. */ | |
eea6121a | 2249 | if (s->size == 0) |
25e762b9 | 2250 | s->size += plt_entry_size; |
6725bdbf | 2251 | |
eea6121a | 2252 | h->plt.offset = s->size; |
6725bdbf | 2253 | |
ced53ee5 AM |
2254 | /* If this symbol is not defined in a regular file, and we are |
2255 | not generating a shared library, then set the symbol to this | |
2256 | location in the .plt. This is required to make function | |
2257 | pointers compare as equal between the normal executable and | |
2258 | the shared library. */ | |
2259 | if (! info->shared | |
f5385ebf | 2260 | && !h->def_regular) |
ced53ee5 AM |
2261 | { |
2262 | h->root.u.def.section = s; | |
2263 | h->root.u.def.value = h->plt.offset; | |
2264 | } | |
6725bdbf | 2265 | |
ced53ee5 | 2266 | /* Make room for this entry. */ |
25e762b9 | 2267 | s->size += plt_entry_size; |
6725bdbf | 2268 | |
ced53ee5 AM |
2269 | /* We also need to make an entry in the .got.plt section, which |
2270 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2271 | htab->elf.sgotplt->size += 4; |
6725bdbf | 2272 | |
6725bdbf | 2273 | /* We also need to make an entry in the .rel.plt section. */ |
6de2ae4a | 2274 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
e1f98742 | 2275 | htab->elf.srelplt->reloc_count++; |
eac338cf | 2276 | |
23209a78 RM |
2277 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
2278 | && !info->shared) | |
eac338cf PB |
2279 | { |
2280 | /* VxWorks has a second set of relocations for each PLT entry | |
2281 | in executables. They go in a separate relocation section, | |
2282 | which is processed by the kernel loader. */ | |
2283 | ||
2284 | /* There are two relocations for the initial PLT entry: an | |
2285 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2286 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2287 | ||
25e762b9 | 2288 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2289 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2290 | ||
2291 | /* There are two extra relocations for each subsequent PLT entry: | |
2292 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2293 | relocation for the PLT entry. */ | |
2294 | ||
2295 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2296 | } | |
6725bdbf | 2297 | } |
ced53ee5 AM |
2298 | else |
2299 | { | |
51b64d56 | 2300 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2301 | h->needs_plt = 0; |
ced53ee5 | 2302 | } |
6725bdbf AM |
2303 | } |
2304 | else | |
2305 | { | |
51b64d56 | 2306 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2307 | h->needs_plt = 0; |
6725bdbf AM |
2308 | } |
2309 | ||
67a4f2b7 AO |
2310 | eh->tlsdesc_got = (bfd_vma) -1; |
2311 | ||
37e55690 | 2312 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2313 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2314 | if (h->got.refcount > 0 | |
1d85728f | 2315 | && info->executable |
13ae64f3 | 2316 | && h->dynindx == -1 |
37e55690 | 2317 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2318 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2319 | else if (h->got.refcount > 0) |
6725bdbf | 2320 | { |
0ac8d2ca | 2321 | asection *s; |
b34976b6 | 2322 | bfd_boolean dyn; |
13ae64f3 | 2323 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2324 | |
5a15f56f AM |
2325 | /* Make sure this symbol is output as a dynamic symbol. |
2326 | Undefined weak syms won't yet be marked as dynamic. */ | |
2327 | if (h->dynindx == -1 | |
f5385ebf | 2328 | && !h->forced_local) |
5a15f56f | 2329 | { |
c152c796 | 2330 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2331 | return FALSE; |
5a15f56f AM |
2332 | } |
2333 | ||
6de2ae4a | 2334 | s = htab->elf.sgot; |
67a4f2b7 AO |
2335 | if (GOT_TLS_GDESC_P (tls_type)) |
2336 | { | |
6de2ae4a | 2337 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2338 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2339 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2340 | h->got.offset = (bfd_vma) -2; |
2341 | } | |
2342 | if (! GOT_TLS_GDESC_P (tls_type) | |
2343 | || GOT_TLS_GD_P (tls_type)) | |
2344 | { | |
2345 | h->got.offset = s->size; | |
2346 | s->size += 4; | |
2347 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2348 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2349 | s->size += 4; | |
2350 | } | |
ebe50bae | 2351 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2352 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2353 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2354 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2355 | need two), R_386_TLS_GD needs one if local symbol and two if | |
2356 | global. */ | |
2357 | if (tls_type == GOT_TLS_IE_BOTH) | |
6de2ae4a | 2358 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2359 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2360 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2361 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2362 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2363 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2364 | else if (! GOT_TLS_GDESC_P (tls_type) |
2365 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2366 | || h->root.type != bfd_link_hash_undefweak) | |
ef5aade5 L |
2367 | && (info->shared |
2368 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6de2ae4a | 2369 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2370 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2371 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2372 | } |
2373 | else | |
51b64d56 | 2374 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2375 | |
5a15f56f | 2376 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2377 | return TRUE; |
5a15f56f | 2378 | |
0c715baa AM |
2379 | /* In the shared -Bsymbolic case, discard space allocated for |
2380 | dynamic pc-relative relocs against symbols which turn out to be | |
2381 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2382 | space for pc-relative relocs that have become local due to symbol |
2383 | visibility changes. */ | |
0c715baa AM |
2384 | |
2385 | if (info->shared) | |
5a15f56f | 2386 | { |
09695f56 AM |
2387 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2388 | appear on a call or on something like ".long foo - .". We | |
2389 | want calls to protected symbols to resolve directly to the | |
2390 | function rather than going via the plt. If people want | |
2391 | function pointer comparisons to work as expected then they | |
2392 | should avoid writing assembly like ".long foo - .". */ | |
2393 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2394 | { |
e03a8ed8 | 2395 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2396 | |
2397 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2398 | { | |
2399 | p->count -= p->pc_count; | |
2400 | p->pc_count = 0; | |
2401 | if (p->count == 0) | |
2402 | *pp = p->next; | |
2403 | else | |
2404 | pp = &p->next; | |
2405 | } | |
5a15f56f | 2406 | } |
4e795f50 | 2407 | |
23209a78 | 2408 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2409 | { |
e03a8ed8 | 2410 | struct elf_dyn_relocs **pp; |
3348747a NS |
2411 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2412 | { | |
2413 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2414 | *pp = p->next; | |
2415 | else | |
2416 | pp = &p->next; | |
2417 | } | |
2418 | } | |
2419 | ||
4e795f50 | 2420 | /* Also discard relocs on undefined weak syms with non-default |
3348747a | 2421 | visibility. */ |
22d606e9 | 2422 | if (eh->dyn_relocs != NULL |
4e795f50 | 2423 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2424 | { |
2425 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2426 | eh->dyn_relocs = NULL; | |
2427 | ||
2428 | /* Make sure undefined weak symbols are output as a dynamic | |
2429 | symbol in PIEs. */ | |
2430 | else if (h->dynindx == -1 | |
2431 | && !h->forced_local) | |
2432 | { | |
2433 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2434 | return FALSE; | |
2435 | } | |
2436 | } | |
0c715baa | 2437 | } |
a23b6845 | 2438 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2439 | { |
2440 | /* For the non-shared case, discard space for relocs against | |
2441 | symbols which turn out to need copy relocs or are not | |
2442 | dynamic. */ | |
2443 | ||
f5385ebf AM |
2444 | if (!h->non_got_ref |
2445 | && ((h->def_dynamic | |
2446 | && !h->def_regular) | |
ebe50bae | 2447 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2448 | && (h->root.type == bfd_link_hash_undefweak |
2449 | || h->root.type == bfd_link_hash_undefined)))) | |
2450 | { | |
2451 | /* Make sure this symbol is output as a dynamic symbol. | |
2452 | Undefined weak syms won't yet be marked as dynamic. */ | |
2453 | if (h->dynindx == -1 | |
f5385ebf | 2454 | && !h->forced_local) |
0c715baa | 2455 | { |
c152c796 | 2456 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2457 | return FALSE; |
0c715baa | 2458 | } |
5a15f56f | 2459 | |
0c715baa AM |
2460 | /* If that succeeded, we know we'll be keeping all the |
2461 | relocs. */ | |
2462 | if (h->dynindx != -1) | |
2463 | goto keep; | |
2464 | } | |
2465 | ||
2466 | eh->dyn_relocs = NULL; | |
2467 | ||
ec338859 | 2468 | keep: ; |
5a15f56f AM |
2469 | } |
2470 | ||
0c715baa AM |
2471 | /* Finally, allocate space. */ |
2472 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2473 | { |
e7c33416 NC |
2474 | asection *sreloc; |
2475 | ||
cbe950e9 | 2476 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2477 | |
2478 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2479 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2480 | } |
2481 | ||
b34976b6 | 2482 | return TRUE; |
6725bdbf AM |
2483 | } |
2484 | ||
c25bc9fc L |
2485 | /* Allocate space in .plt, .got and associated reloc sections for |
2486 | local dynamic relocs. */ | |
2487 | ||
2488 | static bfd_boolean | |
2489 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2490 | { | |
2491 | struct elf_link_hash_entry *h | |
2492 | = (struct elf_link_hash_entry *) *slot; | |
2493 | ||
2494 | if (h->type != STT_GNU_IFUNC | |
2495 | || !h->def_regular | |
2496 | || !h->ref_regular | |
2497 | || !h->forced_local | |
2498 | || h->root.type != bfd_link_hash_defined) | |
2499 | abort (); | |
2500 | ||
2501 | return elf_i386_allocate_dynrelocs (h, inf); | |
2502 | } | |
2503 | ||
0c715baa AM |
2504 | /* Find any dynamic relocs that apply to read-only sections. */ |
2505 | ||
b34976b6 | 2506 | static bfd_boolean |
eb4ff4d6 | 2507 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
2508 | { |
2509 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 2510 | struct elf_dyn_relocs *p; |
0c715baa | 2511 | |
aa715242 L |
2512 | /* Skip local IFUNC symbols. */ |
2513 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2514 | return TRUE; | |
2515 | ||
0c715baa AM |
2516 | eh = (struct elf_i386_link_hash_entry *) h; |
2517 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2518 | { | |
2519 | asection *s = p->sec->output_section; | |
2520 | ||
2521 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2522 | { | |
2523 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2524 | ||
2525 | info->flags |= DF_TEXTREL; | |
2526 | ||
b70321a2 L |
2527 | if (info->warn_shared_textrel && info->shared) |
2528 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2529 | p->sec->owner, h->root.root.string, | |
2530 | p->sec); | |
2531 | ||
0c715baa | 2532 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2533 | return FALSE; |
0c715baa AM |
2534 | } |
2535 | } | |
b34976b6 | 2536 | return TRUE; |
0c715baa AM |
2537 | } |
2538 | ||
daa67607 L |
2539 | /* Convert |
2540 | mov foo@GOT(%reg), %reg | |
2541 | to | |
2542 | lea foo@GOTOFF(%reg), %reg | |
2543 | with the local symbol, foo. */ | |
2544 | ||
2545 | static bfd_boolean | |
2546 | elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2547 | struct bfd_link_info *link_info) | |
2548 | { | |
2549 | Elf_Internal_Shdr *symtab_hdr; | |
2550 | Elf_Internal_Rela *internal_relocs; | |
2551 | Elf_Internal_Rela *irel, *irelend; | |
2552 | bfd_byte *contents; | |
2553 | struct elf_i386_link_hash_table *htab; | |
2554 | bfd_boolean changed_contents; | |
2555 | bfd_boolean changed_relocs; | |
2556 | bfd_signed_vma *local_got_refcounts; | |
2557 | ||
2558 | /* Don't even try to convert non-ELF outputs. */ | |
2559 | if (!is_elf_hash_table (link_info->hash)) | |
2560 | return FALSE; | |
2561 | ||
fbdc86d9 | 2562 | /* Nothing to do if there are no codes, no relocations or no output. */ |
daa67607 | 2563 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
fbdc86d9 L |
2564 | || sec->reloc_count == 0 |
2565 | || discarded_section (sec)) | |
daa67607 L |
2566 | return TRUE; |
2567 | ||
2568 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2569 | ||
2570 | /* Load the relocations for this section. */ | |
2571 | internal_relocs = (_bfd_elf_link_read_relocs | |
2572 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2573 | link_info->keep_memory)); | |
2574 | if (internal_relocs == NULL) | |
2575 | return FALSE; | |
2576 | ||
2577 | htab = elf_i386_hash_table (link_info); | |
2578 | changed_contents = FALSE; | |
2579 | changed_relocs = FALSE; | |
2580 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2581 | ||
2582 | /* Get the section contents. */ | |
2583 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2584 | contents = elf_section_data (sec)->this_hdr.contents; | |
2585 | else | |
2586 | { | |
2587 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2588 | goto error_return; | |
2589 | } | |
2590 | ||
2591 | irelend = internal_relocs + sec->reloc_count; | |
2592 | for (irel = internal_relocs; irel < irelend; irel++) | |
2593 | { | |
2594 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2595 | unsigned int r_symndx = ELF32_R_SYM (irel->r_info); | |
2596 | unsigned int indx; | |
2597 | struct elf_link_hash_entry *h; | |
2598 | ||
2599 | if (r_type != R_386_GOT32) | |
2600 | continue; | |
2601 | ||
2602 | /* Get the symbol referred to by the reloc. */ | |
2603 | if (r_symndx < symtab_hdr->sh_info) | |
2604 | { | |
2605 | Elf_Internal_Sym *isym; | |
2606 | ||
2607 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2608 | abfd, r_symndx); | |
2609 | ||
2610 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */ | |
2611 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
2612 | && bfd_get_8 (input_bfd, | |
2613 | contents + irel->r_offset - 2) == 0x8b) | |
2614 | { | |
2615 | bfd_put_8 (output_bfd, 0x8d, | |
2616 | contents + irel->r_offset - 2); | |
2617 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2618 | if (local_got_refcounts != NULL | |
2619 | && local_got_refcounts[r_symndx] > 0) | |
2620 | local_got_refcounts[r_symndx] -= 1; | |
2621 | changed_contents = TRUE; | |
2622 | changed_relocs = TRUE; | |
2623 | } | |
2624 | continue; | |
2625 | } | |
2626 | ||
2627 | indx = r_symndx - symtab_hdr->sh_info; | |
2628 | h = elf_sym_hashes (abfd)[indx]; | |
2629 | BFD_ASSERT (h != NULL); | |
2630 | ||
2631 | while (h->root.type == bfd_link_hash_indirect | |
2632 | || h->root.type == bfd_link_hash_warning) | |
2633 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2634 | ||
3f65f599 L |
2635 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid |
2636 | optimizing _DYNAMIC since ld.so may use its link-time address. */ | |
daa67607 L |
2637 | if (h->def_regular |
2638 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2639 | && h != htab->elf.hdynamic |
daa67607 L |
2640 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
2641 | && bfd_get_8 (input_bfd, | |
2642 | contents + irel->r_offset - 2) == 0x8b) | |
2643 | { | |
2644 | bfd_put_8 (output_bfd, 0x8d, | |
2645 | contents + irel->r_offset - 2); | |
2646 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2647 | if (h->got.refcount > 0) | |
2648 | h->got.refcount -= 1; | |
2649 | changed_contents = TRUE; | |
2650 | changed_relocs = TRUE; | |
2651 | } | |
2652 | } | |
2653 | ||
2654 | if (contents != NULL | |
2655 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2656 | { | |
2657 | if (!changed_contents && !link_info->keep_memory) | |
2658 | free (contents); | |
2659 | else | |
2660 | { | |
2661 | /* Cache the section contents for elf_link_input_bfd. */ | |
2662 | elf_section_data (sec)->this_hdr.contents = contents; | |
2663 | } | |
2664 | } | |
2665 | ||
2666 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2667 | { | |
2668 | if (!changed_relocs) | |
2669 | free (internal_relocs); | |
2670 | else | |
2671 | elf_section_data (sec)->relocs = internal_relocs; | |
2672 | } | |
2673 | ||
2674 | return TRUE; | |
2675 | ||
2676 | error_return: | |
2677 | if (contents != NULL | |
2678 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2679 | free (contents); | |
2680 | if (internal_relocs != NULL | |
2681 | && elf_section_data (sec)->relocs != internal_relocs) | |
2682 | free (internal_relocs); | |
2683 | return FALSE; | |
2684 | } | |
2685 | ||
252b5132 RH |
2686 | /* Set the sizes of the dynamic sections. */ |
2687 | ||
b34976b6 | 2688 | static bfd_boolean |
23209a78 | 2689 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 2690 | { |
6725bdbf | 2691 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
2692 | bfd *dynobj; |
2693 | asection *s; | |
b34976b6 | 2694 | bfd_boolean relocs; |
0c715baa | 2695 | bfd *ibfd; |
252b5132 | 2696 | |
6725bdbf | 2697 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2698 | if (htab == NULL) |
2699 | return FALSE; | |
ebe50bae | 2700 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
2701 | if (dynobj == NULL) |
2702 | abort (); | |
252b5132 | 2703 | |
ebe50bae | 2704 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2705 | { |
2706 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2707 | if (info->executable) |
252b5132 | 2708 | { |
3d4d4302 | 2709 | s = bfd_get_linker_section (dynobj, ".interp"); |
ffb2e45b AM |
2710 | if (s == NULL) |
2711 | abort (); | |
eea6121a | 2712 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
2713 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2714 | } | |
161d71a6 | 2715 | } |
6725bdbf | 2716 | |
0c715baa AM |
2717 | /* Set up .got offsets for local syms, and space for local dynamic |
2718 | relocs. */ | |
2719 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
161d71a6 L |
2720 | { |
2721 | bfd_signed_vma *local_got; | |
2722 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 2723 | char *local_tls_type; |
67a4f2b7 | 2724 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
2725 | bfd_size_type locsymcount; |
2726 | Elf_Internal_Shdr *symtab_hdr; | |
2727 | asection *srel; | |
6725bdbf | 2728 | |
0ffa91dd | 2729 | if (! is_i386_elf (ibfd)) |
161d71a6 | 2730 | continue; |
6725bdbf | 2731 | |
0c715baa AM |
2732 | for (s = ibfd->sections; s != NULL; s = s->next) |
2733 | { | |
e03a8ed8 | 2734 | struct elf_dyn_relocs *p; |
0c715baa | 2735 | |
daa67607 L |
2736 | if (!elf_i386_convert_mov_to_lea (ibfd, s, info)) |
2737 | return FALSE; | |
2738 | ||
e03a8ed8 | 2739 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 2740 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
2741 | p != NULL; |
2742 | p = p->next) | |
0c715baa | 2743 | { |
ec338859 AM |
2744 | if (!bfd_is_abs_section (p->sec) |
2745 | && bfd_is_abs_section (p->sec->output_section)) | |
2746 | { | |
2747 | /* Input section has been discarded, either because | |
2748 | it is a copy of a linkonce section or due to | |
2749 | linker script /DISCARD/, so we'll be discarding | |
2750 | the relocs too. */ | |
2751 | } | |
23209a78 | 2752 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
2753 | && strcmp (p->sec->output_section->name, |
2754 | ".tls_vars") == 0) | |
2755 | { | |
2756 | /* Relocations in vxworks .tls_vars sections are | |
2757 | handled specially by the loader. */ | |
2758 | } | |
248866a8 | 2759 | else if (p->count != 0) |
ec338859 AM |
2760 | { |
2761 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2762 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
2763 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2764 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2765 | { |
2766 | info->flags |= DF_TEXTREL; | |
2767 | if (info->warn_shared_textrel && info->shared) | |
2768 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2769 | p->sec->owner, p->sec); | |
b70321a2 | 2770 | } |
ec338859 | 2771 | } |
0c715baa AM |
2772 | } |
2773 | } | |
2774 | ||
2775 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
2776 | if (!local_got) |
2777 | continue; | |
6725bdbf | 2778 | |
0ffa91dd | 2779 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
2780 | locsymcount = symtab_hdr->sh_info; |
2781 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 2782 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 2783 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
2784 | s = htab->elf.sgot; |
2785 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2786 | for (; local_got < end_local_got; |
2787 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 2788 | { |
67a4f2b7 | 2789 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 2790 | if (*local_got > 0) |
6725bdbf | 2791 | { |
67a4f2b7 AO |
2792 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2793 | { | |
6de2ae4a | 2794 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 2795 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2796 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2797 | *local_got = (bfd_vma) -2; |
2798 | } | |
2799 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2800 | || GOT_TLS_GD_P (*local_tls_type)) | |
2801 | { | |
2802 | *local_got = s->size; | |
2803 | s->size += 4; | |
2804 | if (GOT_TLS_GD_P (*local_tls_type) | |
2805 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
2806 | s->size += 4; | |
2807 | } | |
13ae64f3 | 2808 | if (info->shared |
67a4f2b7 | 2809 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
2810 | || (*local_tls_type & GOT_TLS_IE)) |
2811 | { | |
2812 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 2813 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2814 | else if (GOT_TLS_GD_P (*local_tls_type) |
2815 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 2816 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2817 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 2818 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 2819 | } |
6725bdbf | 2820 | } |
161d71a6 L |
2821 | else |
2822 | *local_got = (bfd_vma) -1; | |
6725bdbf | 2823 | } |
252b5132 | 2824 | } |
6725bdbf | 2825 | |
13ae64f3 JJ |
2826 | if (htab->tls_ldm_got.refcount > 0) |
2827 | { | |
2828 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
2829 | relocs. */ | |
6de2ae4a L |
2830 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
2831 | htab->elf.sgot->size += 8; | |
2832 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
2833 | } |
2834 | else | |
2835 | htab->tls_ldm_got.offset = -1; | |
2836 | ||
0c715baa AM |
2837 | /* Allocate global sym .plt and .got entries, and space for global |
2838 | sym dynamic relocs. */ | |
eb4ff4d6 | 2839 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 2840 | |
c25bc9fc L |
2841 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2842 | htab_traverse (htab->loc_hash_table, | |
2843 | elf_i386_allocate_local_dynrelocs, | |
2844 | info); | |
2845 | ||
67a4f2b7 AO |
2846 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2847 | incremented. However, when we reserve space for TLS descriptors, | |
2848 | it's not incremented, so in order to compute the space reserved | |
2849 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 2850 | slot size. |
caa0075c | 2851 | |
e1f98742 L |
2852 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
2853 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 2854 | if (htab->elf.srelplt) |
e1f98742 L |
2855 | { |
2856 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
2857 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
2858 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2859 | } | |
2860 | else if (htab->elf.irelplt) | |
2861 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
2862 | ||
67a4f2b7 | 2863 | |
a7b16ceb L |
2864 | if (htab->elf.sgotplt) |
2865 | { | |
2866 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 2867 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
2868 | if ((htab->elf.hgot == NULL |
2869 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
2870 | && (htab->elf.sgotplt->size |
2871 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2872 | && (htab->elf.splt == NULL |
2873 | || htab->elf.splt->size == 0) | |
2874 | && (htab->elf.sgot == NULL | |
2875 | || htab->elf.sgot->size == 0) | |
2876 | && (htab->elf.iplt == NULL | |
2877 | || htab->elf.iplt->size == 0) | |
2878 | && (htab->elf.igotplt == NULL | |
2879 | || htab->elf.igotplt->size == 0)) | |
2880 | htab->elf.sgotplt->size = 0; | |
2881 | } | |
2882 | ||
9a2a56cc AM |
2883 | |
2884 | if (htab->plt_eh_frame != NULL | |
2885 | && htab->elf.splt != NULL | |
2886 | && htab->elf.splt->size != 0 | |
2887 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
2888 | && _bfd_elf_eh_frame_present (info)) | |
2889 | htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt); | |
2890 | ||
5a15f56f AM |
2891 | /* We now have determined the sizes of the various dynamic sections. |
2892 | Allocate memory for them. */ | |
b34976b6 | 2893 | relocs = FALSE; |
252b5132 RH |
2894 | for (s = dynobj->sections; s != NULL; s = s->next) |
2895 | { | |
eac338cf PB |
2896 | bfd_boolean strip_section = TRUE; |
2897 | ||
252b5132 RH |
2898 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
2899 | continue; | |
2900 | ||
6de2ae4a | 2901 | if (s == htab->elf.splt |
9a2a56cc | 2902 | || s == htab->elf.sgot) |
252b5132 | 2903 | { |
6725bdbf AM |
2904 | /* Strip this section if we don't need it; see the |
2905 | comment below. */ | |
eac338cf PB |
2906 | /* We'd like to strip these sections if they aren't needed, but if |
2907 | we've exported dynamic symbols from them we must leave them. | |
2908 | It's too late to tell BFD to get rid of the symbols. */ | |
2909 | ||
7325306f | 2910 | if (htab->elf.hplt != NULL) |
eac338cf | 2911 | strip_section = FALSE; |
252b5132 | 2912 | } |
9a2a56cc AM |
2913 | else if (s == htab->elf.sgotplt |
2914 | || s == htab->elf.iplt | |
2915 | || s == htab->elf.igotplt | |
2916 | || s == htab->plt_eh_frame | |
2917 | || s == htab->sdynbss) | |
2918 | { | |
2919 | /* Strip these too. */ | |
2920 | } | |
0112cd26 | 2921 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 2922 | { |
6de2ae4a L |
2923 | if (s->size != 0 |
2924 | && s != htab->elf.srelplt | |
2925 | && s != htab->srelplt2) | |
b34976b6 | 2926 | relocs = TRUE; |
252b5132 | 2927 | |
0ac8d2ca AM |
2928 | /* We use the reloc_count field as a counter if we need |
2929 | to copy relocs into the output file. */ | |
5ae0bfb6 | 2930 | s->reloc_count = 0; |
252b5132 | 2931 | } |
6725bdbf | 2932 | else |
252b5132 RH |
2933 | { |
2934 | /* It's not one of our sections, so don't allocate space. */ | |
2935 | continue; | |
2936 | } | |
2937 | ||
c456f082 | 2938 | if (s->size == 0) |
252b5132 | 2939 | { |
0ac8d2ca AM |
2940 | /* If we don't need this section, strip it from the |
2941 | output file. This is mostly to handle .rel.bss and | |
2942 | .rel.plt. We must create both sections in | |
2943 | create_dynamic_sections, because they must be created | |
2944 | before the linker maps input sections to output | |
2945 | sections. The linker does that before | |
2946 | adjust_dynamic_symbol is called, and it is that | |
2947 | function which decides whether anything needs to go | |
2948 | into these sections. */ | |
c456f082 AM |
2949 | if (strip_section) |
2950 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
2951 | continue; |
2952 | } | |
2953 | ||
c456f082 AM |
2954 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2955 | continue; | |
2956 | ||
f69da49f AM |
2957 | /* Allocate memory for the section contents. We use bfd_zalloc |
2958 | here in case unused entries are not reclaimed before the | |
2959 | section's contents are written out. This should not happen, | |
2960 | but this way if it does, we get a R_386_NONE reloc instead | |
2961 | of garbage. */ | |
a50b1753 | 2962 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 2963 | if (s->contents == NULL) |
b34976b6 | 2964 | return FALSE; |
252b5132 RH |
2965 | } |
2966 | ||
e41b3a13 | 2967 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
2968 | && htab->plt_eh_frame->contents != NULL) |
2969 | { | |
2970 | memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt, | |
2971 | sizeof (elf_i386_eh_frame_plt)); | |
2972 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
2973 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
2974 | } | |
e41b3a13 | 2975 | |
ebe50bae | 2976 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2977 | { |
2978 | /* Add some entries to the .dynamic section. We fill in the | |
2979 | values later, in elf_i386_finish_dynamic_sections, but we | |
2980 | must add the entries now so that we get the correct size for | |
2981 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2982 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2983 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2984 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2985 | |
36af4a4e | 2986 | if (info->executable) |
252b5132 | 2987 | { |
dc810e39 | 2988 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2989 | return FALSE; |
252b5132 RH |
2990 | } |
2991 | ||
6de2ae4a | 2992 | if (htab->elf.splt->size != 0) |
252b5132 | 2993 | { |
dc810e39 AM |
2994 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2995 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2996 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
2997 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2998 | return FALSE; |
252b5132 RH |
2999 | } |
3000 | ||
3001 | if (relocs) | |
3002 | { | |
dc810e39 AM |
3003 | if (!add_dynamic_entry (DT_REL, 0) |
3004 | || !add_dynamic_entry (DT_RELSZ, 0) | |
3005 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 3006 | return FALSE; |
252b5132 | 3007 | |
0c715baa AM |
3008 | /* If any dynamic relocs apply to a read-only section, |
3009 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 3010 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
3011 | elf_link_hash_traverse (&htab->elf, |
3012 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
3013 | |
3014 | if ((info->flags & DF_TEXTREL) != 0) | |
3015 | { | |
3016 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 3017 | return FALSE; |
0c715baa | 3018 | } |
252b5132 | 3019 | } |
23209a78 | 3020 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
3021 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
3022 | return FALSE; | |
252b5132 | 3023 | } |
dc810e39 | 3024 | #undef add_dynamic_entry |
252b5132 | 3025 | |
b34976b6 | 3026 | return TRUE; |
252b5132 RH |
3027 | } |
3028 | ||
67a4f2b7 AO |
3029 | static bfd_boolean |
3030 | elf_i386_always_size_sections (bfd *output_bfd, | |
3031 | struct bfd_link_info *info) | |
3032 | { | |
3033 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3034 | ||
3035 | if (tls_sec) | |
3036 | { | |
3037 | struct elf_link_hash_entry *tlsbase; | |
3038 | ||
3039 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3040 | "_TLS_MODULE_BASE_", | |
3041 | FALSE, FALSE, FALSE); | |
3042 | ||
3043 | if (tlsbase && tlsbase->type == STT_TLS) | |
3044 | { | |
4dfe6ac6 | 3045 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3046 | struct bfd_link_hash_entry *bh = NULL; |
3047 | const struct elf_backend_data *bed | |
3048 | = get_elf_backend_data (output_bfd); | |
3049 | ||
4dfe6ac6 NC |
3050 | htab = elf_i386_hash_table (info); |
3051 | if (htab == NULL) | |
3052 | return FALSE; | |
3053 | ||
67a4f2b7 AO |
3054 | if (!(_bfd_generic_link_add_one_symbol |
3055 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3056 | tls_sec, 0, NULL, FALSE, | |
3057 | bed->collect, &bh))) | |
3058 | return FALSE; | |
9f03412a | 3059 | |
4dfe6ac6 | 3060 | htab->tls_module_base = bh; |
9f03412a | 3061 | |
67a4f2b7 AO |
3062 | tlsbase = (struct elf_link_hash_entry *)bh; |
3063 | tlsbase->def_regular = 1; | |
3064 | tlsbase->other = STV_HIDDEN; | |
3065 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
3066 | } | |
3067 | } | |
3068 | ||
3069 | return TRUE; | |
3070 | } | |
3071 | ||
38701953 AM |
3072 | /* Set the correct type for an x86 ELF section. We do this by the |
3073 | section name, which is a hack, but ought to work. */ | |
3074 | ||
b34976b6 | 3075 | static bfd_boolean |
55fd94b0 AM |
3076 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3077 | Elf_Internal_Shdr *hdr, | |
3078 | asection *sec) | |
38701953 | 3079 | { |
91d6fa6a | 3080 | const char *name; |
38701953 AM |
3081 | |
3082 | name = bfd_get_section_name (abfd, sec); | |
3083 | ||
3084 | /* This is an ugly, but unfortunately necessary hack that is | |
3085 | needed when producing EFI binaries on x86. It tells | |
3086 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3087 | containing ELF relocation info. We need this hack in order to | |
3088 | be able to generate ELF binaries that can be translated into | |
3089 | EFI applications (which are essentially COFF objects). Those | |
3090 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3091 | which would normally cause BFD to segfault because it would | |
3092 | attempt to interpret this section as containing relocation | |
3093 | entries for section "oc". With this hack enabled, ".reloc" | |
3094 | will be treated as a normal data section, which will avoid the | |
3095 | segfault. However, you won't be able to create an ELFNN binary | |
3096 | with a section named "oc" that needs relocations, but that's | |
3097 | the kind of ugly side-effects you get when detecting section | |
3098 | types based on their names... In practice, this limitation is | |
3099 | unlikely to bite. */ | |
3100 | if (strcmp (name, ".reloc") == 0) | |
3101 | hdr->sh_type = SHT_PROGBITS; | |
3102 | ||
b34976b6 | 3103 | return TRUE; |
38701953 AM |
3104 | } |
3105 | ||
9f03412a AO |
3106 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3107 | executables. Rather than setting it to the beginning of the TLS | |
3108 | section, we have to set it to the end. This function may be called | |
3109 | multiple times, it is idempotent. */ | |
3110 | ||
3111 | static void | |
eb4ff4d6 | 3112 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3113 | { |
4dfe6ac6 | 3114 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3115 | struct bfd_link_hash_entry *base; |
3116 | ||
3117 | if (!info->executable) | |
3118 | return; | |
3119 | ||
4dfe6ac6 NC |
3120 | htab = elf_i386_hash_table (info); |
3121 | if (htab == NULL) | |
3122 | return; | |
9f03412a | 3123 | |
4dfe6ac6 NC |
3124 | base = htab->tls_module_base; |
3125 | if (base == NULL) | |
9f03412a AO |
3126 | return; |
3127 | ||
4dfe6ac6 | 3128 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3129 | } |
3130 | ||
13ae64f3 JJ |
3131 | /* Return the base VMA address which should be subtracted from real addresses |
3132 | when resolving @dtpoff relocation. | |
3133 | This is PT_TLS segment p_vaddr. */ | |
3134 | ||
3135 | static bfd_vma | |
eb4ff4d6 | 3136 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3137 | { |
e1918d23 AM |
3138 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3139 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3140 | return 0; |
e1918d23 | 3141 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3142 | } |
3143 | ||
3144 | /* Return the relocation value for @tpoff relocation | |
3145 | if STT_TLS virtual address is ADDRESS. */ | |
3146 | ||
3147 | static bfd_vma | |
eb4ff4d6 | 3148 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3149 | { |
e1918d23 | 3150 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3151 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3152 | bfd_vma static_tls_size; | |
13ae64f3 | 3153 | |
e1918d23 AM |
3154 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3155 | if (htab->tls_sec == NULL) | |
6a30718d | 3156 | return 0; |
7dc98aea RO |
3157 | |
3158 | /* Consider special static TLS alignment requirements. */ | |
3159 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3160 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3161 | } |
3162 | ||
252b5132 RH |
3163 | /* Relocate an i386 ELF section. */ |
3164 | ||
b34976b6 | 3165 | static bfd_boolean |
55fd94b0 AM |
3166 | elf_i386_relocate_section (bfd *output_bfd, |
3167 | struct bfd_link_info *info, | |
3168 | bfd *input_bfd, | |
3169 | asection *input_section, | |
3170 | bfd_byte *contents, | |
3171 | Elf_Internal_Rela *relocs, | |
3172 | Elf_Internal_Sym *local_syms, | |
3173 | asection **local_sections) | |
252b5132 | 3174 | { |
6725bdbf | 3175 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3176 | Elf_Internal_Shdr *symtab_hdr; |
3177 | struct elf_link_hash_entry **sym_hashes; | |
3178 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3179 | bfd_vma *local_tlsdesc_gotents; |
252b5132 RH |
3180 | Elf_Internal_Rela *rel; |
3181 | Elf_Internal_Rela *relend; | |
3348747a | 3182 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3183 | unsigned plt_entry_size; |
252b5132 | 3184 | |
0ffa91dd | 3185 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3186 | |
6725bdbf | 3187 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3188 | if (htab == NULL) |
3189 | return FALSE; | |
0ffa91dd | 3190 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3191 | sym_hashes = elf_sym_hashes (input_bfd); |
3192 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3193 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3194 | /* We have to handle relocations in vxworks .tls_vars sections |
3195 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 RM |
3196 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3197 | && info->shared | |
3348747a NS |
3198 | && !strcmp (input_section->output_section->name, |
3199 | ".tls_vars")); | |
252b5132 | 3200 | |
eb4ff4d6 | 3201 | elf_i386_set_tls_module_base (info); |
9f03412a | 3202 | |
25e762b9 RM |
3203 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3204 | ||
252b5132 RH |
3205 | rel = relocs; |
3206 | relend = relocs + input_section->reloc_count; | |
3207 | for (; rel < relend; rel++) | |
3208 | { | |
13ae64f3 | 3209 | unsigned int r_type; |
252b5132 RH |
3210 | reloc_howto_type *howto; |
3211 | unsigned long r_symndx; | |
3212 | struct elf_link_hash_entry *h; | |
3213 | Elf_Internal_Sym *sym; | |
3214 | asection *sec; | |
67a4f2b7 | 3215 | bfd_vma off, offplt; |
252b5132 | 3216 | bfd_vma relocation; |
b34976b6 | 3217 | bfd_boolean unresolved_reloc; |
252b5132 | 3218 | bfd_reloc_status_type r; |
1b452ec6 | 3219 | unsigned int indx; |
13ae64f3 | 3220 | int tls_type; |
252b5132 RH |
3221 | |
3222 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3223 | if (r_type == R_386_GNU_VTINHERIT |
3224 | || r_type == R_386_GNU_VTENTRY) | |
252b5132 | 3225 | continue; |
dc47f327 | 3226 | |
55fd94b0 | 3227 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3228 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3229 | >= R_386_ext - R_386_standard) | |
3230 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
cbe950e9 | 3231 | >= R_386_irelative - R_386_ext)) |
252b5132 | 3232 | { |
6ba842b6 | 3233 | (*_bfd_error_handler) |
d003868e AM |
3234 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3235 | input_bfd, input_section, r_type); | |
252b5132 | 3236 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3237 | return FALSE; |
252b5132 | 3238 | } |
1b452ec6 | 3239 | howto = elf_howto_table + indx; |
252b5132 RH |
3240 | |
3241 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3242 | h = NULL; |
3243 | sym = NULL; | |
3244 | sec = NULL; | |
b34976b6 | 3245 | unresolved_reloc = FALSE; |
252b5132 RH |
3246 | if (r_symndx < symtab_hdr->sh_info) |
3247 | { | |
3248 | sym = local_syms + r_symndx; | |
3249 | sec = local_sections[r_symndx]; | |
3250 | relocation = (sec->output_section->vma | |
3251 | + sec->output_offset | |
3252 | + sym->st_value); | |
ab96bf03 AM |
3253 | |
3254 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3255 | && ((sec->flags & SEC_MERGE) != 0 | |
3256 | || (info->relocatable | |
3257 | && sec->output_offset != 0))) | |
f8df10f4 | 3258 | { |
f8df10f4 | 3259 | bfd_vma addend; |
4a335f3d | 3260 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3261 | |
4a335f3d | 3262 | switch (howto->size) |
f8df10f4 | 3263 | { |
4a335f3d AM |
3264 | case 0: |
3265 | addend = bfd_get_8 (input_bfd, where); | |
3266 | if (howto->pc_relative) | |
3267 | { | |
3268 | addend = (addend ^ 0x80) - 0x80; | |
3269 | addend += 1; | |
3270 | } | |
3271 | break; | |
3272 | case 1: | |
3273 | addend = bfd_get_16 (input_bfd, where); | |
3274 | if (howto->pc_relative) | |
3275 | { | |
3276 | addend = (addend ^ 0x8000) - 0x8000; | |
3277 | addend += 2; | |
3278 | } | |
3279 | break; | |
3280 | case 2: | |
3281 | addend = bfd_get_32 (input_bfd, where); | |
3282 | if (howto->pc_relative) | |
3283 | { | |
3284 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3285 | addend += 4; | |
3286 | } | |
3287 | break; | |
3288 | default: | |
3289 | abort (); | |
f8df10f4 JJ |
3290 | } |
3291 | ||
ab96bf03 AM |
3292 | if (info->relocatable) |
3293 | addend += sec->output_offset; | |
3294 | else | |
3295 | { | |
3296 | asection *msec = sec; | |
3297 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3298 | addend); | |
3299 | addend -= relocation; | |
3300 | addend += msec->output_section->vma + msec->output_offset; | |
3301 | } | |
4a335f3d AM |
3302 | |
3303 | switch (howto->size) | |
3304 | { | |
3305 | case 0: | |
16a10388 | 3306 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3307 | if (howto->pc_relative) |
3308 | addend -= 1; | |
3309 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3310 | break; |
3311 | case 1: | |
3312 | if (howto->pc_relative) | |
3313 | addend -= 2; | |
3314 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3315 | break; |
3316 | case 2: | |
3317 | if (howto->pc_relative) | |
3318 | addend -= 4; | |
3319 | bfd_put_32 (input_bfd, addend, where); | |
3320 | break; | |
3321 | } | |
f8df10f4 | 3322 | } |
1f85278f L |
3323 | else if (!info->relocatable |
3324 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
c25bc9fc L |
3325 | { |
3326 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3327 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3328 | FALSE); | |
c25bc9fc L |
3329 | if (h == NULL) |
3330 | abort (); | |
3331 | ||
23209a78 | 3332 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3333 | h->root.u.def.value = sym->st_value; |
3334 | h->root.u.def.section = sec; | |
3335 | } | |
252b5132 RH |
3336 | } |
3337 | else | |
3338 | { | |
3d540e93 | 3339 | bfd_boolean warned ATTRIBUTE_UNUSED; |
ffb2e45b | 3340 | |
b2a8e766 AM |
3341 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3342 | r_symndx, symtab_hdr, sym_hashes, | |
3343 | h, sec, relocation, | |
3344 | unresolved_reloc, warned); | |
252b5132 RH |
3345 | } |
3346 | ||
dbaa2011 | 3347 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3348 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3349 | rel, 1, relend, howto, 0, contents); |
9635fe29 | 3350 | |
ab96bf03 AM |
3351 | if (info->relocatable) |
3352 | continue; | |
3353 | ||
cbe950e9 L |
3354 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3355 | it here if it is defined in a non-shared object. */ | |
3356 | if (h != NULL | |
3357 | && h->type == STT_GNU_IFUNC | |
3358 | && h->def_regular) | |
3359 | { | |
3360 | asection *plt, *gotplt, *base_got; | |
3361 | bfd_vma plt_index; | |
4c544807 | 3362 | const char *name; |
cbe950e9 L |
3363 | |
3364 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3365 | || h->plt.offset == (bfd_vma) -1) | |
3366 | abort (); | |
3367 | ||
3368 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3369 | if (htab->elf.splt != NULL) |
cbe950e9 | 3370 | { |
6de2ae4a L |
3371 | plt = htab->elf.splt; |
3372 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3373 | } |
3374 | else | |
3375 | { | |
6de2ae4a L |
3376 | plt = htab->elf.iplt; |
3377 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3378 | } |
3379 | ||
3380 | relocation = (plt->output_section->vma | |
3381 | + plt->output_offset + h->plt.offset); | |
3382 | ||
3383 | switch (r_type) | |
3384 | { | |
3385 | default: | |
4c544807 L |
3386 | if (h->root.root.string) |
3387 | name = h->root.root.string; | |
3388 | else | |
3389 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3390 | NULL); | |
cbe950e9 L |
3391 | (*_bfd_error_handler) |
3392 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3393 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3394 | elf_howto_table[r_type].name, | |
4c544807 | 3395 | name, __FUNCTION__); |
cbe950e9 L |
3396 | bfd_set_error (bfd_error_bad_value); |
3397 | return FALSE; | |
3398 | ||
3399 | case R_386_32: | |
710ab287 | 3400 | /* Generate dynamic relcoation only when there is a |
c293fa49 | 3401 | non-GOT reference in a shared object. */ |
710ab287 L |
3402 | if (info->shared && h->non_got_ref) |
3403 | { | |
3404 | Elf_Internal_Rela outrel; | |
3405 | bfd_byte *loc; | |
3406 | asection *sreloc; | |
3407 | bfd_vma offset; | |
3408 | ||
c25bc9fc L |
3409 | /* Need a dynamic relocation to get the real function |
3410 | adddress. */ | |
710ab287 L |
3411 | offset = _bfd_elf_section_offset (output_bfd, |
3412 | info, | |
3413 | input_section, | |
3414 | rel->r_offset); | |
3415 | if (offset == (bfd_vma) -1 | |
3416 | || offset == (bfd_vma) -2) | |
3417 | abort (); | |
3418 | ||
3419 | outrel.r_offset = (input_section->output_section->vma | |
3420 | + input_section->output_offset | |
3421 | + offset); | |
3422 | ||
3423 | if (h->dynindx == -1 | |
44c4ea11 L |
3424 | || h->forced_local |
3425 | || info->executable) | |
710ab287 L |
3426 | { |
3427 | /* This symbol is resolved locally. */ | |
56b8aada L |
3428 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); |
3429 | bfd_put_32 (output_bfd, | |
3430 | (h->root.u.def.value | |
3431 | + h->root.u.def.section->output_section->vma | |
3432 | + h->root.u.def.section->output_offset), | |
3433 | contents + offset); | |
710ab287 L |
3434 | } |
3435 | else | |
56b8aada | 3436 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
710ab287 | 3437 | |
6de2ae4a | 3438 | sreloc = htab->elf.irelifunc; |
710ab287 L |
3439 | loc = sreloc->contents; |
3440 | loc += (sreloc->reloc_count++ | |
3441 | * sizeof (Elf32_External_Rel)); | |
3442 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
3443 | ||
3444 | /* If this reloc is against an external symbol, we | |
3445 | do not want to fiddle with the addend. Otherwise, | |
3446 | we need to include the symbol value so that it | |
3447 | becomes an addend for the dynamic reloc. For an | |
3448 | internal symbol, we have updated addend. */ | |
56b8aada | 3449 | continue; |
710ab287 | 3450 | } |
d59a60e9 | 3451 | /* FALLTHROUGH */ |
cbe950e9 L |
3452 | case R_386_PC32: |
3453 | case R_386_PLT32: | |
3454 | goto do_relocation; | |
3455 | ||
3456 | case R_386_GOT32: | |
6de2ae4a | 3457 | base_got = htab->elf.sgot; |
cbe950e9 L |
3458 | off = h->got.offset; |
3459 | ||
7afd84dc | 3460 | if (base_got == NULL) |
cbe950e9 L |
3461 | abort (); |
3462 | ||
7afd84dc | 3463 | if (off == (bfd_vma) -1) |
cbe950e9 | 3464 | { |
7afd84dc L |
3465 | /* We can't use h->got.offset here to save state, or |
3466 | even just remember the offset, as finish_dynamic_symbol | |
3467 | would use that as offset into .got. */ | |
6bbec505 | 3468 | |
6de2ae4a | 3469 | if (htab->elf.splt != NULL) |
7afd84dc | 3470 | { |
25e762b9 | 3471 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3472 | off = (plt_index + 3) * 4; |
6de2ae4a | 3473 | base_got = htab->elf.sgotplt; |
7afd84dc | 3474 | } |
cbe950e9 L |
3475 | else |
3476 | { | |
25e762b9 | 3477 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3478 | off = plt_index * 4; |
6de2ae4a | 3479 | base_got = htab->elf.igotplt; |
7afd84dc L |
3480 | } |
3481 | ||
3482 | if (h->dynindx == -1 | |
3483 | || h->forced_local | |
3484 | || info->symbolic) | |
3485 | { | |
3486 | /* This references the local defitionion. We must | |
3487 | initialize this entry in the global offset table. | |
3488 | Since the offset must always be a multiple of 8, | |
3489 | we use the least significant bit to record | |
3490 | whether we have initialized it already. | |
3491 | ||
3492 | When doing a dynamic link, we create a .rela.got | |
3493 | relocation entry to initialize the value. This | |
3494 | is done in the finish_dynamic_symbol routine. */ | |
3495 | if ((off & 1) != 0) | |
3496 | off &= ~1; | |
3497 | else | |
3498 | { | |
3499 | bfd_put_32 (output_bfd, relocation, | |
3500 | base_got->contents + off); | |
3501 | h->got.offset |= 1; | |
3502 | } | |
cbe950e9 | 3503 | } |
cbe950e9 | 3504 | |
7afd84dc | 3505 | relocation = off; |
cbe950e9 | 3506 | |
7afd84dc | 3507 | /* Adjust for static executables. */ |
6de2ae4a | 3508 | if (htab->elf.splt == NULL) |
7afd84dc L |
3509 | relocation += gotplt->output_offset; |
3510 | } | |
3511 | else | |
0018b0a3 L |
3512 | { |
3513 | relocation = (base_got->output_section->vma | |
3514 | + base_got->output_offset + off | |
3515 | - gotplt->output_section->vma | |
3516 | - gotplt->output_offset); | |
3517 | /* Adjust for static executables. */ | |
6de2ae4a | 3518 | if (htab->elf.splt == NULL) |
0018b0a3 L |
3519 | relocation += gotplt->output_offset; |
3520 | } | |
3521 | ||
cbe950e9 L |
3522 | goto do_relocation; |
3523 | ||
3524 | case R_386_GOTOFF: | |
3525 | relocation -= (gotplt->output_section->vma | |
3526 | + gotplt->output_offset); | |
3527 | goto do_relocation; | |
3528 | } | |
3529 | } | |
3530 | ||
252b5132 RH |
3531 | switch (r_type) |
3532 | { | |
3533 | case R_386_GOT32: | |
3534 | /* Relocation is to the entry for this symbol in the global | |
3535 | offset table. */ | |
6de2ae4a | 3536 | if (htab->elf.sgot == NULL) |
ffb2e45b | 3537 | abort (); |
252b5132 RH |
3538 | |
3539 | if (h != NULL) | |
3540 | { | |
b34976b6 | 3541 | bfd_boolean dyn; |
252b5132 RH |
3542 | |
3543 | off = h->got.offset; | |
ebe50bae | 3544 | dyn = htab->elf.dynamic_sections_created; |
26e41594 | 3545 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
252b5132 | 3546 | || (info->shared |
586119b3 | 3547 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
3548 | || (ELF_ST_VISIBILITY (h->other) |
3549 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3550 | { |
3551 | /* This is actually a static link, or it is a | |
3552 | -Bsymbolic link and the symbol is defined | |
3553 | locally, or the symbol was forced to be local | |
3554 | because of a version file. We must initialize | |
3555 | this entry in the global offset table. Since the | |
3556 | offset must always be a multiple of 4, we use the | |
3557 | least significant bit to record whether we have | |
3558 | initialized it already. | |
3559 | ||
3560 | When doing a dynamic link, we create a .rel.got | |
3561 | relocation entry to initialize the value. This | |
3562 | is done in the finish_dynamic_symbol routine. */ | |
3563 | if ((off & 1) != 0) | |
3564 | off &= ~1; | |
3565 | else | |
3566 | { | |
3567 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 3568 | htab->elf.sgot->contents + off); |
252b5132 RH |
3569 | h->got.offset |= 1; |
3570 | } | |
3571 | } | |
8c694914 | 3572 | else |
b34976b6 | 3573 | unresolved_reloc = FALSE; |
252b5132 RH |
3574 | } |
3575 | else | |
3576 | { | |
ffb2e45b AM |
3577 | if (local_got_offsets == NULL) |
3578 | abort (); | |
252b5132 RH |
3579 | |
3580 | off = local_got_offsets[r_symndx]; | |
3581 | ||
3582 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
3583 | the least significant bit to record whether we have |
3584 | already generated the necessary reloc. */ | |
252b5132 RH |
3585 | if ((off & 1) != 0) |
3586 | off &= ~1; | |
3587 | else | |
3588 | { | |
6725bdbf | 3589 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 3590 | htab->elf.sgot->contents + off); |
252b5132 RH |
3591 | |
3592 | if (info->shared) | |
3593 | { | |
947216bf AM |
3594 | asection *s; |
3595 | Elf_Internal_Rela outrel; | |
3596 | bfd_byte *loc; | |
252b5132 | 3597 | |
6de2ae4a | 3598 | s = htab->elf.srelgot; |
947216bf | 3599 | if (s == NULL) |
ffb2e45b | 3600 | abort (); |
252b5132 | 3601 | |
6de2ae4a L |
3602 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3603 | + htab->elf.sgot->output_offset | |
252b5132 RH |
3604 | + off); |
3605 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
947216bf AM |
3606 | loc = s->contents; |
3607 | loc += s->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 3608 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
3609 | } |
3610 | ||
3611 | local_got_offsets[r_symndx] |= 1; | |
3612 | } | |
252b5132 RH |
3613 | } |
3614 | ||
ffb2e45b AM |
3615 | if (off >= (bfd_vma) -2) |
3616 | abort (); | |
3617 | ||
6de2ae4a L |
3618 | relocation = htab->elf.sgot->output_section->vma |
3619 | + htab->elf.sgot->output_offset + off | |
3620 | - htab->elf.sgotplt->output_section->vma | |
3621 | - htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3622 | break; |
3623 | ||
3624 | case R_386_GOTOFF: | |
3625 | /* Relocation is relative to the start of the global offset | |
3626 | table. */ | |
3627 | ||
90f487df L |
3628 | /* Check to make sure it isn't a protected function symbol |
3629 | for shared library since it may not be local when used | |
41bed6dd L |
3630 | as function address. We also need to make sure that a |
3631 | symbol is defined locally. */ | |
3632 | if (info->shared && h) | |
90f487df | 3633 | { |
41bed6dd L |
3634 | if (!h->def_regular) |
3635 | { | |
3636 | const char *v; | |
3637 | ||
3638 | switch (ELF_ST_VISIBILITY (h->other)) | |
3639 | { | |
3640 | case STV_HIDDEN: | |
3641 | v = _("hidden symbol"); | |
3642 | break; | |
3643 | case STV_INTERNAL: | |
3644 | v = _("internal symbol"); | |
3645 | break; | |
3646 | case STV_PROTECTED: | |
3647 | v = _("protected symbol"); | |
3648 | break; | |
3649 | default: | |
3650 | v = _("symbol"); | |
3651 | break; | |
3652 | } | |
3653 | ||
3654 | (*_bfd_error_handler) | |
3655 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), | |
3656 | input_bfd, v, h->root.root.string); | |
3657 | bfd_set_error (bfd_error_bad_value); | |
3658 | return FALSE; | |
3659 | } | |
3660 | else if (!info->executable | |
bdb892b9 | 3661 | && !SYMBOLIC_BIND (info, h) |
41bed6dd L |
3662 | && h->type == STT_FUNC |
3663 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3664 | { | |
3665 | (*_bfd_error_handler) | |
3666 | (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"), | |
3667 | input_bfd, h->root.root.string); | |
3668 | bfd_set_error (bfd_error_bad_value); | |
3669 | return FALSE; | |
3670 | } | |
90f487df L |
3671 | } |
3672 | ||
8c37241b JJ |
3673 | /* Note that sgot is not involved in this |
3674 | calculation. We always want the start of .got.plt. If we | |
3675 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
3676 | permitted by the ABI, we might have to change this |
3677 | calculation. */ | |
6de2ae4a L |
3678 | relocation -= htab->elf.sgotplt->output_section->vma |
3679 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3680 | break; |
3681 | ||
3682 | case R_386_GOTPC: | |
3683 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
3684 | relocation = htab->elf.sgotplt->output_section->vma |
3685 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 3686 | unresolved_reloc = FALSE; |
252b5132 RH |
3687 | break; |
3688 | ||
3689 | case R_386_PLT32: | |
3690 | /* Relocation is to the entry for this symbol in the | |
3691 | procedure linkage table. */ | |
3692 | ||
dd5724d5 | 3693 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 3694 | without using the procedure linkage table. */ |
252b5132 RH |
3695 | if (h == NULL) |
3696 | break; | |
3697 | ||
dd5724d5 | 3698 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3699 | || htab->elf.splt == NULL) |
252b5132 RH |
3700 | { |
3701 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
3702 | happens when statically linking PIC code, or when |
3703 | using -Bsymbolic. */ | |
252b5132 RH |
3704 | break; |
3705 | } | |
3706 | ||
6de2ae4a L |
3707 | relocation = (htab->elf.splt->output_section->vma |
3708 | + htab->elf.splt->output_offset | |
252b5132 | 3709 | + h->plt.offset); |
b34976b6 | 3710 | unresolved_reloc = FALSE; |
252b5132 RH |
3711 | break; |
3712 | ||
3713 | case R_386_32: | |
3714 | case R_386_PC32: | |
3348747a NS |
3715 | if ((input_section->flags & SEC_ALLOC) == 0 |
3716 | || is_vxworks_tls) | |
ec338859 AM |
3717 | break; |
3718 | ||
12d0ee4a | 3719 | if ((info->shared |
ef5aade5 L |
3720 | && (h == NULL |
3721 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3722 | || h->root.type != bfd_link_hash_undefweak) | |
12d0ee4a | 3723 | && (r_type != R_386_PC32 |
f6c52c13 | 3724 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 AM |
3725 | || (ELIMINATE_COPY_RELOCS |
3726 | && !info->shared | |
12d0ee4a AM |
3727 | && h != NULL |
3728 | && h->dynindx != -1 | |
f5385ebf AM |
3729 | && !h->non_got_ref |
3730 | && ((h->def_dynamic | |
3731 | && !h->def_regular) | |
28d0b90e | 3732 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3733 | || h->root.type == bfd_link_hash_undefined))) |
252b5132 | 3734 | { |
947216bf AM |
3735 | Elf_Internal_Rela outrel; |
3736 | bfd_byte *loc; | |
b34976b6 | 3737 | bfd_boolean skip, relocate; |
0c715baa | 3738 | asection *sreloc; |
252b5132 RH |
3739 | |
3740 | /* When generating a shared object, these relocations | |
3741 | are copied into the output file to be resolved at run | |
3742 | time. */ | |
3743 | ||
b34976b6 AM |
3744 | skip = FALSE; |
3745 | relocate = FALSE; | |
252b5132 | 3746 | |
c629eae0 JJ |
3747 | outrel.r_offset = |
3748 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3749 | rel->r_offset); | |
3750 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 3751 | skip = TRUE; |
0bb2d96a | 3752 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3753 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
3754 | outrel.r_offset += (input_section->output_section->vma |
3755 | + input_section->output_offset); | |
3756 | ||
3757 | if (skip) | |
0bb2d96a | 3758 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
3759 | else if (h != NULL |
3760 | && h->dynindx != -1 | |
3761 | && (r_type == R_386_PC32 | |
3762 | || !info->shared | |
55255dae | 3763 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 3764 | || !h->def_regular)) |
0bb2d96a | 3765 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
3766 | else |
3767 | { | |
5a15f56f | 3768 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 3769 | relocate = TRUE; |
5a15f56f | 3770 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
3771 | } |
3772 | ||
cbe950e9 | 3773 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 3774 | |
62d78908 L |
3775 | if (sreloc == NULL || sreloc->contents == NULL) |
3776 | { | |
3777 | r = bfd_reloc_notsupported; | |
3778 | goto check_relocation_error; | |
3779 | } | |
0c715baa | 3780 | |
947216bf AM |
3781 | loc = sreloc->contents; |
3782 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
e7c33416 | 3783 | |
0c715baa | 3784 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
252b5132 RH |
3785 | |
3786 | /* If this reloc is against an external symbol, we do | |
3787 | not want to fiddle with the addend. Otherwise, we | |
3788 | need to include the symbol value so that it becomes | |
3789 | an addend for the dynamic reloc. */ | |
0f88be7a | 3790 | if (! relocate) |
252b5132 RH |
3791 | continue; |
3792 | } | |
252b5132 RH |
3793 | break; |
3794 | ||
37e55690 | 3795 | case R_386_TLS_IE: |
1d85728f | 3796 | if (!info->executable) |
37e55690 | 3797 | { |
947216bf AM |
3798 | Elf_Internal_Rela outrel; |
3799 | bfd_byte *loc; | |
37e55690 | 3800 | asection *sreloc; |
37e55690 JJ |
3801 | |
3802 | outrel.r_offset = rel->r_offset | |
3803 | + input_section->output_section->vma | |
3804 | + input_section->output_offset; | |
3805 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
3806 | sreloc = elf_section_data (input_section)->sreloc; | |
3807 | if (sreloc == NULL) | |
3808 | abort (); | |
947216bf AM |
3809 | loc = sreloc->contents; |
3810 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
37e55690 JJ |
3811 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
3812 | } | |
3813 | /* Fall through */ | |
3814 | ||
13ae64f3 | 3815 | case R_386_TLS_GD: |
67a4f2b7 AO |
3816 | case R_386_TLS_GOTDESC: |
3817 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 3818 | case R_386_TLS_IE_32: |
37e55690 | 3819 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
3820 | tls_type = GOT_UNKNOWN; |
3821 | if (h == NULL && local_got_offsets) | |
3822 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
3823 | else if (h != NULL) | |
142411ca | 3824 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
3825 | if (tls_type == GOT_TLS_IE) |
3826 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
3827 | |
3828 | if (! elf_i386_tls_transition (info, input_bfd, | |
3829 | input_section, contents, | |
3830 | symtab_hdr, sym_hashes, | |
3831 | &r_type, tls_type, rel, | |
4c544807 | 3832 | relend, h, r_symndx)) |
142411ca | 3833 | return FALSE; |
13ae64f3 JJ |
3834 | |
3835 | if (r_type == R_386_TLS_LE_32) | |
3836 | { | |
82e51918 | 3837 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
3838 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
3839 | { | |
142411ca | 3840 | unsigned int type; |
13ae64f3 JJ |
3841 | bfd_vma roff; |
3842 | ||
3843 | /* GD->LE transition. */ | |
13ae64f3 | 3844 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
3845 | if (type == 0x04) |
3846 | { | |
3847 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
3848 | Change it into: | |
3849 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3850 | (6 byte form of subl). */ | |
13ae64f3 JJ |
3851 | memcpy (contents + rel->r_offset - 3, |
3852 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
142411ca | 3853 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
3854 | } |
3855 | else | |
3856 | { | |
142411ca L |
3857 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop |
3858 | Change it into: | |
3859 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3860 | (6 byte form of subl). */ | |
3861 | memcpy (contents + rel->r_offset - 2, | |
3862 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
3863 | roff = rel->r_offset + 6; | |
13ae64f3 | 3864 | } |
eb4ff4d6 | 3865 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 3866 | contents + roff); |
a3fadc9a | 3867 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
3868 | rel++; |
3869 | continue; | |
3870 | } | |
67a4f2b7 AO |
3871 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
3872 | { | |
3873 | /* GDesc -> LE transition. | |
3874 | It's originally something like: | |
3875 | leal x@tlsdesc(%ebx), %eax | |
3876 | ||
3877 | leal x@ntpoff, %eax | |
3878 | ||
3879 | Registers other than %eax may be set up here. */ | |
3880 | ||
142411ca | 3881 | unsigned int val; |
67a4f2b7 AO |
3882 | bfd_vma roff; |
3883 | ||
67a4f2b7 | 3884 | roff = rel->r_offset; |
67a4f2b7 | 3885 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3886 | |
3887 | /* Now modify the instruction as appropriate. */ | |
3888 | /* aoliva FIXME: remove the above and xor the byte | |
3889 | below with 0x86. */ | |
3890 | bfd_put_8 (output_bfd, val ^ 0x86, | |
3891 | contents + roff - 1); | |
eb4ff4d6 | 3892 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
3893 | contents + roff); |
3894 | continue; | |
3895 | } | |
3896 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
3897 | { | |
3898 | /* GDesc -> LE transition. | |
3899 | It's originally: | |
3900 | call *(%eax) | |
3901 | Turn it into: | |
142411ca | 3902 | xchg %ax,%ax */ |
67a4f2b7 | 3903 | |
67a4f2b7 | 3904 | bfd_vma roff; |
6bbec505 | 3905 | |
67a4f2b7 | 3906 | roff = rel->r_offset; |
10efb593 | 3907 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3908 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3909 | continue; | |
3910 | } | |
37e55690 | 3911 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 3912 | { |
142411ca | 3913 | unsigned int val; |
13ae64f3 JJ |
3914 | |
3915 | /* IE->LE transition: | |
37e55690 JJ |
3916 | Originally it can be one of: |
3917 | movl foo, %eax | |
3918 | movl foo, %reg | |
3919 | addl foo, %reg | |
3920 | We change it into: | |
3921 | movl $foo, %eax | |
3922 | movl $foo, %reg | |
3923 | addl $foo, %reg. */ | |
37e55690 | 3924 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
3925 | if (val == 0xa1) |
3926 | { | |
3927 | /* movl foo, %eax. */ | |
55fd94b0 AM |
3928 | bfd_put_8 (output_bfd, 0xb8, |
3929 | contents + rel->r_offset - 1); | |
37e55690 | 3930 | } |
299bf759 | 3931 | else |
37e55690 | 3932 | { |
142411ca L |
3933 | unsigned int type; |
3934 | ||
55fd94b0 AM |
3935 | type = bfd_get_8 (input_bfd, |
3936 | contents + rel->r_offset - 2); | |
299bf759 | 3937 | switch (type) |
26e41594 | 3938 | { |
299bf759 L |
3939 | case 0x8b: |
3940 | /* movl */ | |
299bf759 L |
3941 | bfd_put_8 (output_bfd, 0xc7, |
3942 | contents + rel->r_offset - 2); | |
3943 | bfd_put_8 (output_bfd, | |
3944 | 0xc0 | ((val >> 3) & 7), | |
3945 | contents + rel->r_offset - 1); | |
3946 | break; | |
3947 | case 0x03: | |
3948 | /* addl */ | |
299bf759 L |
3949 | bfd_put_8 (output_bfd, 0x81, |
3950 | contents + rel->r_offset - 2); | |
3951 | bfd_put_8 (output_bfd, | |
3952 | 0xc0 | ((val >> 3) & 7), | |
3953 | contents + rel->r_offset - 1); | |
3954 | break; | |
3955 | default: | |
3956 | BFD_FAIL (); | |
3957 | break; | |
26e41594 | 3958 | } |
37e55690 | 3959 | } |
eb4ff4d6 | 3960 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3961 | contents + rel->r_offset); |
3962 | continue; | |
3963 | } | |
3964 | else | |
3965 | { | |
3966 | unsigned int val, type; | |
3967 | ||
3968 | /* {IE_32,GOTIE}->LE transition: | |
3969 | Originally it can be one of: | |
13ae64f3 | 3970 | subl foo(%reg1), %reg2 |
13ae64f3 | 3971 | movl foo(%reg1), %reg2 |
37e55690 | 3972 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
3973 | We change it into: |
3974 | subl $foo, %reg2 | |
37e55690 JJ |
3975 | movl $foo, %reg2 (6 byte form) |
3976 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
3977 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
3978 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3979 | if (type == 0x8b) |
3980 | { | |
3981 | /* movl */ | |
13ae64f3 JJ |
3982 | bfd_put_8 (output_bfd, 0xc7, |
3983 | contents + rel->r_offset - 2); | |
3984 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3985 | contents + rel->r_offset - 1); | |
3986 | } | |
3987 | else if (type == 0x2b) | |
3988 | { | |
3989 | /* subl */ | |
13ae64f3 JJ |
3990 | bfd_put_8 (output_bfd, 0x81, |
3991 | contents + rel->r_offset - 2); | |
3992 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
3993 | contents + rel->r_offset - 1); | |
3994 | } | |
37e55690 JJ |
3995 | else if (type == 0x03) |
3996 | { | |
3997 | /* addl */ | |
3998 | bfd_put_8 (output_bfd, 0x81, | |
3999 | contents + rel->r_offset - 2); | |
4000 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
4001 | contents + rel->r_offset - 1); | |
4002 | } | |
13ae64f3 JJ |
4003 | else |
4004 | BFD_FAIL (); | |
37e55690 | 4005 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 4006 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
4007 | contents + rel->r_offset); |
4008 | else | |
eb4ff4d6 | 4009 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 4010 | contents + rel->r_offset); |
13ae64f3 JJ |
4011 | continue; |
4012 | } | |
4013 | } | |
4014 | ||
6de2ae4a | 4015 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4016 | abort (); |
4017 | ||
4018 | if (h != NULL) | |
67a4f2b7 AO |
4019 | { |
4020 | off = h->got.offset; | |
4021 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
4022 | } | |
13ae64f3 JJ |
4023 | else |
4024 | { | |
4025 | if (local_got_offsets == NULL) | |
4026 | abort (); | |
4027 | ||
4028 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 4029 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
4030 | } |
4031 | ||
4032 | if ((off & 1) != 0) | |
4033 | off &= ~1; | |
26e41594 | 4034 | else |
13ae64f3 | 4035 | { |
947216bf AM |
4036 | Elf_Internal_Rela outrel; |
4037 | bfd_byte *loc; | |
91d6fa6a | 4038 | int dr_type; |
67a4f2b7 | 4039 | asection *sreloc; |
13ae64f3 | 4040 | |
6de2ae4a | 4041 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4042 | abort (); |
4043 | ||
67a4f2b7 AO |
4044 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
4045 | ||
4046 | if (GOT_TLS_GDESC_P (tls_type)) | |
4047 | { | |
4048 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); | |
4049 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4050 | <= htab->elf.sgotplt->size); |
4051 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4052 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4053 | + offplt |
4054 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4055 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4056 | loc = sreloc->contents; |
5ae0bfb6 RS |
4057 | loc += (htab->next_tls_desc_index++ |
4058 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 AO |
4059 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
4060 | <= sreloc->contents + sreloc->size); | |
4061 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); | |
4062 | if (indx == 0) | |
4063 | { | |
4064 | BFD_ASSERT (! unresolved_reloc); | |
4065 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4066 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4067 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4068 | + htab->sgotplt_jump_table_size + 4); |
4069 | } | |
4070 | else | |
4071 | { | |
4072 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4073 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4074 | + htab->sgotplt_jump_table_size + 4); |
4075 | } | |
4076 | } | |
4077 | ||
6de2ae4a | 4078 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4079 | |
6de2ae4a L |
4080 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4081 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4082 | |
67a4f2b7 | 4083 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4084 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4085 | else if (GOT_TLS_GDESC_P (tls_type)) |
4086 | goto dr_done; | |
37e55690 JJ |
4087 | else if (tls_type == GOT_TLS_IE_POS) |
4088 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4089 | else |
4090 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4091 | |
37e55690 | 4092 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4093 | bfd_put_32 (output_bfd, |
4094 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4095 | htab->elf.sgot->contents + off); |
37e55690 | 4096 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4097 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4098 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4099 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4100 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4101 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4102 | htab->elf.sgot->contents + off); |
13ae64f3 | 4103 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 AO |
4104 | |
4105 | loc = sreloc->contents; | |
4106 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
4107 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) | |
4108 | <= sreloc->contents + sreloc->size); | |
13ae64f3 JJ |
4109 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4110 | ||
67a4f2b7 | 4111 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4112 | { |
4113 | if (indx == 0) | |
4114 | { | |
82e51918 | 4115 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4116 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4117 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4118 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4119 | } |
4120 | else | |
4121 | { | |
4122 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4123 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4124 | outrel.r_info = ELF32_R_INFO (indx, |
4125 | R_386_TLS_DTPOFF32); | |
4126 | outrel.r_offset += 4; | |
67a4f2b7 | 4127 | sreloc->reloc_count++; |
947216bf | 4128 | loc += sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
4129 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
4130 | <= sreloc->contents + sreloc->size); | |
947216bf | 4131 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
13ae64f3 JJ |
4132 | } |
4133 | } | |
37e55690 JJ |
4134 | else if (tls_type == GOT_TLS_IE_BOTH) |
4135 | { | |
4136 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4137 | (indx == 0 |
4138 | ? relocation - elf_i386_dtpoff_base (info) | |
4139 | : 0), | |
6de2ae4a | 4140 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4141 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4142 | outrel.r_offset += 4; | |
67a4f2b7 | 4143 | sreloc->reloc_count++; |
947216bf | 4144 | loc += sizeof (Elf32_External_Rel); |
37e55690 JJ |
4145 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4146 | } | |
13ae64f3 | 4147 | |
67a4f2b7 | 4148 | dr_done: |
13ae64f3 JJ |
4149 | if (h != NULL) |
4150 | h->got.offset |= 1; | |
4151 | else | |
4152 | local_got_offsets[r_symndx] |= 1; | |
4153 | } | |
4154 | ||
67a4f2b7 AO |
4155 | if (off >= (bfd_vma) -2 |
4156 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4157 | abort (); |
67a4f2b7 AO |
4158 | if (r_type == R_386_TLS_GOTDESC |
4159 | || r_type == R_386_TLS_DESC_CALL) | |
4160 | { | |
4161 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4162 | unresolved_reloc = FALSE; | |
4163 | } | |
4164 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4165 | { |
6de2ae4a L |
4166 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4167 | + htab->elf.sgotplt->output_offset; | |
4168 | relocation = htab->elf.sgot->output_section->vma | |
4169 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4170 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4171 | && tls_type == GOT_TLS_IE_BOTH) | |
4172 | relocation += 4; | |
4173 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4174 | relocation += g_o_t; |
b34976b6 | 4175 | unresolved_reloc = FALSE; |
13ae64f3 | 4176 | } |
67a4f2b7 | 4177 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4178 | { |
4179 | unsigned int val, type; | |
4180 | bfd_vma roff; | |
4181 | ||
4182 | /* GD->IE transition. */ | |
13ae64f3 | 4183 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
4184 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
4185 | if (type == 0x04) | |
4186 | { | |
4187 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
4188 | Change it into: | |
4189 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 | 4190 | val >>= 3; |
142411ca | 4191 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4192 | } |
4193 | else | |
4194 | { | |
4195 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
4196 | Change it into: | |
4197 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4198 | roff = rel->r_offset - 2; |
4199 | } | |
4200 | memcpy (contents + roff, | |
4201 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4202 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4203 | /* If foo is used only with foo@gotntpoff(%reg) and |
4204 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4205 | subl $foo@gottpoff(%reg), %eax | |
4206 | into: | |
4207 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4208 | if (tls_type == GOT_TLS_IE_POS) |
4209 | contents[roff + 6] = 0x03; | |
8c37241b | 4210 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4211 | htab->elf.sgot->output_section->vma |
4212 | + htab->elf.sgot->output_offset + off | |
4213 | - htab->elf.sgotplt->output_section->vma | |
4214 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 JJ |
4215 | contents + roff + 8); |
4216 | /* Skip R_386_PLT32. */ | |
4217 | rel++; | |
4218 | continue; | |
4219 | } | |
67a4f2b7 AO |
4220 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4221 | { | |
4222 | /* GDesc -> IE transition. | |
4223 | It's originally something like: | |
4224 | leal x@tlsdesc(%ebx), %eax | |
4225 | ||
4226 | Change it to: | |
142411ca | 4227 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4228 | or: |
4229 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4230 | ||
4231 | Registers other than %eax may be set up here. */ | |
4232 | ||
67a4f2b7 AO |
4233 | bfd_vma roff; |
4234 | ||
4235 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4236 | offset into any register, although it's probably | |
4237 | almost always going to be eax. */ | |
4238 | roff = rel->r_offset; | |
67a4f2b7 AO |
4239 | |
4240 | /* Now modify the instruction as appropriate. */ | |
4241 | /* To turn a leal into a movl in the form we use it, it | |
4242 | suffices to change the first byte from 0x8d to 0x8b. | |
4243 | aoliva FIXME: should we decide to keep the leal, all | |
4244 | we have to do is remove the statement below, and | |
4245 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4246 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4247 | ||
4248 | if (tls_type == GOT_TLS_IE_BOTH) | |
4249 | off += 4; | |
4250 | ||
4251 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4252 | htab->elf.sgot->output_section->vma |
4253 | + htab->elf.sgot->output_offset + off | |
4254 | - htab->elf.sgotplt->output_section->vma | |
4255 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4256 | contents + roff); |
4257 | continue; | |
4258 | } | |
4259 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4260 | { | |
4261 | /* GDesc -> IE transition. | |
4262 | It's originally: | |
4263 | call *(%eax) | |
4264 | ||
4265 | Change it to: | |
142411ca | 4266 | xchg %ax,%ax |
67a4f2b7 AO |
4267 | or |
4268 | negl %eax | |
4269 | depending on how we transformed the TLS_GOTDESC above. | |
4270 | */ | |
4271 | ||
67a4f2b7 AO |
4272 | bfd_vma roff; |
4273 | ||
67a4f2b7 | 4274 | roff = rel->r_offset; |
67a4f2b7 AO |
4275 | |
4276 | /* Now modify the instruction as appropriate. */ | |
4277 | if (tls_type != GOT_TLS_IE_NEG) | |
4278 | { | |
10efb593 L |
4279 | /* xchg %ax,%ax */ |
4280 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
4281 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4282 | } | |
4283 | else | |
4284 | { | |
4285 | /* negl %eax */ | |
4286 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
4287 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
4288 | } | |
4289 | ||
4290 | continue; | |
4291 | } | |
4292 | else | |
4293 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
4294 | break; |
4295 | ||
4296 | case R_386_TLS_LDM: | |
142411ca L |
4297 | if (! elf_i386_tls_transition (info, input_bfd, |
4298 | input_section, contents, | |
4299 | symtab_hdr, sym_hashes, | |
4300 | &r_type, GOT_UNKNOWN, rel, | |
4c544807 | 4301 | relend, h, r_symndx)) |
142411ca | 4302 | return FALSE; |
13ae64f3 | 4303 | |
142411ca L |
4304 | if (r_type != R_386_TLS_LDM) |
4305 | { | |
13ae64f3 | 4306 | /* LD->LE transition: |
13ae64f3 JJ |
4307 | leal foo(%reg), %eax; call ___tls_get_addr. |
4308 | We change it into: | |
4309 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
142411ca | 4310 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
13ae64f3 JJ |
4311 | memcpy (contents + rel->r_offset - 2, |
4312 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 4313 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
4314 | rel++; |
4315 | continue; | |
4316 | } | |
4317 | ||
6de2ae4a | 4318 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4319 | abort (); |
4320 | ||
4321 | off = htab->tls_ldm_got.offset; | |
4322 | if (off & 1) | |
4323 | off &= ~1; | |
4324 | else | |
4325 | { | |
947216bf AM |
4326 | Elf_Internal_Rela outrel; |
4327 | bfd_byte *loc; | |
13ae64f3 | 4328 | |
6de2ae4a | 4329 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4330 | abort (); |
4331 | ||
6de2ae4a L |
4332 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4333 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
4334 | |
4335 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4336 | htab->elf.sgot->contents + off); |
13ae64f3 | 4337 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4338 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 4339 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
6de2ae4a L |
4340 | loc = htab->elf.srelgot->contents; |
4341 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
4342 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4343 | htab->tls_ldm_got.offset |= 1; | |
4344 | } | |
6de2ae4a L |
4345 | relocation = htab->elf.sgot->output_section->vma |
4346 | + htab->elf.sgot->output_offset + off | |
4347 | - htab->elf.sgotplt->output_section->vma | |
4348 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 4349 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
4350 | break; |
4351 | ||
4352 | case R_386_TLS_LDO_32: | |
959b0961 | 4353 | if (!info->executable || (input_section->flags & SEC_CODE) == 0) |
eb4ff4d6 | 4354 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
4355 | else |
4356 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 4357 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4358 | break; |
4359 | ||
4360 | case R_386_TLS_LE_32: | |
13ae64f3 | 4361 | case R_386_TLS_LE: |
1d85728f | 4362 | if (!info->executable) |
37e55690 | 4363 | { |
947216bf | 4364 | Elf_Internal_Rela outrel; |
37e55690 | 4365 | asection *sreloc; |
947216bf | 4366 | bfd_byte *loc; |
37e55690 JJ |
4367 | |
4368 | outrel.r_offset = rel->r_offset | |
4369 | + input_section->output_section->vma | |
4370 | + input_section->output_offset; | |
4371 | if (h != NULL && h->dynindx != -1) | |
4372 | indx = h->dynindx; | |
4373 | else | |
4374 | indx = 0; | |
4375 | if (r_type == R_386_TLS_LE_32) | |
4376 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
4377 | else | |
4378 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
4379 | sreloc = elf_section_data (input_section)->sreloc; | |
4380 | if (sreloc == NULL) | |
4381 | abort (); | |
947216bf AM |
4382 | loc = sreloc->contents; |
4383 | loc += sreloc->reloc_count++ * sizeof (Elf32_External_Rel); | |
37e55690 JJ |
4384 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4385 | if (indx) | |
4386 | continue; | |
4387 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4388 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 4389 | else |
eb4ff4d6 | 4390 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
4391 | } |
4392 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4393 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 4394 | else |
eb4ff4d6 | 4395 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4396 | break; |
4397 | ||
252b5132 RH |
4398 | default: |
4399 | break; | |
4400 | } | |
4401 | ||
239e1f3a AM |
4402 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4403 | because such sections are not SEC_ALLOC and thus ld.so will | |
4404 | not process them. */ | |
8c694914 | 4405 | if (unresolved_reloc |
239e1f3a | 4406 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4407 | && h->def_dynamic) |
4408 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4409 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d JJ |
4410 | { |
4411 | (*_bfd_error_handler) | |
843fe662 | 4412 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
4413 | input_bfd, |
4414 | input_section, | |
6a30718d | 4415 | (long) rel->r_offset, |
843fe662 | 4416 | howto->name, |
6a30718d | 4417 | h->root.root.string); |
b34976b6 | 4418 | return FALSE; |
6a30718d | 4419 | } |
83be169b | 4420 | |
cbe950e9 | 4421 | do_relocation: |
252b5132 RH |
4422 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4423 | contents, rel->r_offset, | |
55fd94b0 | 4424 | relocation, 0); |
252b5132 | 4425 | |
62d78908 | 4426 | check_relocation_error: |
cf5c0c5b | 4427 | if (r != bfd_reloc_ok) |
252b5132 | 4428 | { |
cf5c0c5b | 4429 | const char *name; |
ffb2e45b | 4430 | |
cf5c0c5b AM |
4431 | if (h != NULL) |
4432 | name = h->root.root.string; | |
4433 | else | |
4434 | { | |
4435 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4436 | symtab_hdr->sh_link, | |
4437 | sym->st_name); | |
4438 | if (name == NULL) | |
b34976b6 | 4439 | return FALSE; |
cf5c0c5b AM |
4440 | if (*name == '\0') |
4441 | name = bfd_section_name (input_bfd, sec); | |
4442 | } | |
ffb2e45b | 4443 | |
cf5c0c5b AM |
4444 | if (r == bfd_reloc_overflow) |
4445 | { | |
cf5c0c5b | 4446 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4447 | (info, (h ? &h->root : NULL), name, howto->name, |
4448 | (bfd_vma) 0, input_bfd, input_section, | |
4449 | rel->r_offset))) | |
b34976b6 | 4450 | return FALSE; |
cf5c0c5b AM |
4451 | } |
4452 | else | |
4453 | { | |
4454 | (*_bfd_error_handler) | |
d003868e AM |
4455 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
4456 | input_bfd, input_section, | |
cf5c0c5b | 4457 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4458 | return FALSE; |
cf5c0c5b | 4459 | } |
252b5132 RH |
4460 | } |
4461 | } | |
4462 | ||
b34976b6 | 4463 | return TRUE; |
252b5132 RH |
4464 | } |
4465 | ||
4466 | /* Finish up dynamic symbol handling. We set the contents of various | |
4467 | dynamic sections here. */ | |
4468 | ||
b34976b6 | 4469 | static bfd_boolean |
55fd94b0 AM |
4470 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
4471 | struct bfd_link_info *info, | |
4472 | struct elf_link_hash_entry *h, | |
4473 | Elf_Internal_Sym *sym) | |
252b5132 | 4474 | { |
6725bdbf | 4475 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
4476 | unsigned plt_entry_size; |
4477 | const struct elf_i386_backend_data *abed; | |
252b5132 | 4478 | |
6725bdbf | 4479 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4480 | if (htab == NULL) |
4481 | return FALSE; | |
252b5132 | 4482 | |
25e762b9 RM |
4483 | abed = get_elf_i386_backend_data (output_bfd); |
4484 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
4485 | ||
252b5132 RH |
4486 | if (h->plt.offset != (bfd_vma) -1) |
4487 | { | |
252b5132 RH |
4488 | bfd_vma plt_index; |
4489 | bfd_vma got_offset; | |
947216bf AM |
4490 | Elf_Internal_Rela rel; |
4491 | bfd_byte *loc; | |
cbe950e9 L |
4492 | asection *plt, *gotplt, *relplt; |
4493 | ||
4494 | /* When building a static executable, use .iplt, .igot.plt and | |
4495 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4496 | if (htab->elf.splt != NULL) |
cbe950e9 | 4497 | { |
6de2ae4a L |
4498 | plt = htab->elf.splt; |
4499 | gotplt = htab->elf.sgotplt; | |
4500 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4501 | } |
4502 | else | |
4503 | { | |
6de2ae4a L |
4504 | plt = htab->elf.iplt; |
4505 | gotplt = htab->elf.igotplt; | |
4506 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4507 | } |
252b5132 RH |
4508 | |
4509 | /* This symbol has an entry in the procedure linkage table. Set | |
4510 | it up. */ | |
4511 | ||
cbe950e9 L |
4512 | if ((h->dynindx == -1 |
4513 | && !((h->forced_local || info->executable) | |
4514 | && h->def_regular | |
4515 | && h->type == STT_GNU_IFUNC)) | |
4516 | || plt == NULL | |
4517 | || gotplt == NULL | |
4518 | || relplt == NULL) | |
cec7f46a | 4519 | abort (); |
252b5132 RH |
4520 | |
4521 | /* Get the index in the procedure linkage table which | |
4522 | corresponds to this symbol. This is the index of this symbol | |
4523 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4524 | first entry in the procedure linkage table is reserved. |
252b5132 | 4525 | |
cbe950e9 | 4526 | Get the offset into the .got table of the entry that |
252b5132 | 4527 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 4528 | The first three are reserved. |
6bbec505 | 4529 | |
cbe950e9 L |
4530 | For static executables, we don't reserve anything. */ |
4531 | ||
6de2ae4a | 4532 | if (plt == htab->elf.splt) |
cbe950e9 | 4533 | { |
e1f98742 L |
4534 | got_offset = h->plt.offset / plt_entry_size - 1; |
4535 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
4536 | } |
4537 | else | |
4538 | { | |
e1f98742 L |
4539 | got_offset = h->plt.offset / plt_entry_size; |
4540 | got_offset = got_offset * 4; | |
cbe950e9 | 4541 | } |
252b5132 RH |
4542 | |
4543 | /* Fill in the entry in the procedure linkage table. */ | |
4544 | if (! info->shared) | |
4545 | { | |
25e762b9 RM |
4546 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
4547 | abed->plt->plt_entry_size); | |
252b5132 | 4548 | bfd_put_32 (output_bfd, |
cbe950e9 L |
4549 | (gotplt->output_section->vma |
4550 | + gotplt->output_offset | |
252b5132 | 4551 | + got_offset), |
25e762b9 RM |
4552 | plt->contents + h->plt.offset |
4553 | + abed->plt->plt_got_offset); | |
eac338cf | 4554 | |
25e762b9 | 4555 | if (abed->is_vxworks) |
eac338cf PB |
4556 | { |
4557 | int s, k, reloc_index; | |
4558 | ||
4559 | /* Create the R_386_32 relocation referencing the GOT | |
4560 | for this PLT entry. */ | |
4561 | ||
4562 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
4563 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
4564 | / abed->plt->plt_entry_size); | |
eac338cf PB |
4565 | /* K: Number of relocations for PLTResolve. */ |
4566 | if (info->shared) | |
4567 | k = PLTRESOLVE_RELOCS_SHLIB; | |
4568 | else | |
4569 | k = PLTRESOLVE_RELOCS; | |
4570 | /* Skip the PLTresolve relocations, and the relocations for | |
4571 | the other PLT slots. */ | |
4572 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
4573 | loc = (htab->srelplt2->contents + reloc_index | |
4574 | * sizeof (Elf32_External_Rel)); | |
4575 | ||
6de2ae4a L |
4576 | rel.r_offset = (htab->elf.splt->output_section->vma |
4577 | + htab->elf.splt->output_offset | |
eac338cf | 4578 | + h->plt.offset + 2), |
7325306f | 4579 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4580 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
4581 | ||
4582 | /* Create the R_386_32 relocation referencing the beginning of | |
4583 | the PLT for this GOT entry. */ | |
6de2ae4a L |
4584 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
4585 | + htab->elf.sgotplt->output_offset | |
eac338cf | 4586 | + got_offset); |
7325306f | 4587 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
4588 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4589 | loc + sizeof (Elf32_External_Rel)); | |
4590 | } | |
252b5132 RH |
4591 | } |
4592 | else | |
4593 | { | |
25e762b9 RM |
4594 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
4595 | abed->plt->plt_entry_size); | |
252b5132 | 4596 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
4597 | plt->contents + h->plt.offset |
4598 | + abed->plt->plt_got_offset); | |
252b5132 RH |
4599 | } |
4600 | ||
252b5132 RH |
4601 | /* Fill in the entry in the global offset table. */ |
4602 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4603 | (plt->output_section->vma |
4604 | + plt->output_offset | |
252b5132 | 4605 | + h->plt.offset |
25e762b9 | 4606 | + abed->plt->plt_lazy_offset), |
cbe950e9 | 4607 | gotplt->contents + got_offset); |
252b5132 RH |
4608 | |
4609 | /* Fill in the entry in the .rel.plt section. */ | |
cbe950e9 L |
4610 | rel.r_offset = (gotplt->output_section->vma |
4611 | + gotplt->output_offset | |
252b5132 | 4612 | + got_offset); |
cbe950e9 L |
4613 | if (h->dynindx == -1 |
4614 | || ((info->executable | |
4615 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4616 | && h->def_regular | |
4617 | && h->type == STT_GNU_IFUNC)) | |
4618 | { | |
4619 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4620 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
4621 | in the .got.plt section. */ | |
4622 | bfd_put_32 (output_bfd, | |
23209a78 | 4623 | (h->root.u.def.value |
cbe950e9 L |
4624 | + h->root.u.def.section->output_section->vma |
4625 | + h->root.u.def.section->output_offset), | |
4626 | gotplt->contents + got_offset); | |
4627 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
e1f98742 L |
4628 | /* R_386_IRELATIVE comes last. */ |
4629 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4630 | } |
4631 | else | |
e1f98742 L |
4632 | { |
4633 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
4634 | plt_index = htab->next_jump_slot_index++; | |
4635 | } | |
cbe950e9 | 4636 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); |
0ac8d2ca | 4637 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 | 4638 | |
e1f98742 L |
4639 | /* Don't fill PLT entry for static executables. */ |
4640 | if (plt == htab->elf.splt) | |
4641 | { | |
4642 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
4643 | plt->contents + h->plt.offset | |
4644 | + abed->plt->plt_reloc_offset); | |
4645 | bfd_put_32 (output_bfd, - (h->plt.offset | |
4646 | + abed->plt->plt_plt_offset + 4), | |
4647 | plt->contents + h->plt.offset | |
4648 | + abed->plt->plt_plt_offset); | |
4649 | } | |
4650 | ||
f5385ebf | 4651 | if (!h->def_regular) |
252b5132 RH |
4652 | { |
4653 | /* Mark the symbol as undefined, rather than as defined in | |
c6585bbb JJ |
4654 | the .plt section. Leave the value if there were any |
4655 | relocations where pointer equality matters (this is a clue | |
51b64d56 AM |
4656 | for the dynamic linker, to make function pointer |
4657 | comparisons work between an application and shared | |
c6585bbb JJ |
4658 | library), otherwise set it to zero. If a function is only |
4659 | called from a binary, there is no need to slow down | |
4660 | shared libraries because of that. */ | |
252b5132 | 4661 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4662 | if (!h->pointer_equality_needed) |
c6585bbb | 4663 | sym->st_value = 0; |
252b5132 RH |
4664 | } |
4665 | } | |
4666 | ||
13ae64f3 | 4667 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 4668 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
37e55690 | 4669 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0) |
252b5132 | 4670 | { |
947216bf AM |
4671 | Elf_Internal_Rela rel; |
4672 | bfd_byte *loc; | |
252b5132 RH |
4673 | |
4674 | /* This symbol has an entry in the global offset table. Set it | |
4675 | up. */ | |
4676 | ||
6de2ae4a | 4677 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 4678 | abort (); |
252b5132 | 4679 | |
6de2ae4a L |
4680 | rel.r_offset = (htab->elf.sgot->output_section->vma |
4681 | + htab->elf.sgot->output_offset | |
dc810e39 | 4682 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 4683 | |
dd5724d5 AM |
4684 | /* If this is a static link, or it is a -Bsymbolic link and the |
4685 | symbol is defined locally or was forced to be local because | |
4686 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
4687 | The entry in the global offset table will already have been |
4688 | initialized in the relocate_section function. */ | |
710ab287 | 4689 | if (h->def_regular |
0018b0a3 L |
4690 | && h->type == STT_GNU_IFUNC) |
4691 | { | |
710ab287 L |
4692 | if (info->shared) |
4693 | { | |
4694 | /* Generate R_386_GLOB_DAT. */ | |
4695 | goto do_glob_dat; | |
4696 | } | |
4697 | else | |
4698 | { | |
cd2b2c10 L |
4699 | asection *plt; |
4700 | ||
710ab287 L |
4701 | if (!h->pointer_equality_needed) |
4702 | abort (); | |
4703 | ||
4704 | /* For non-shared object, we can't use .got.plt, which | |
4705 | contains the real function addres if we need pointer | |
4706 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 4707 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4708 | bfd_put_32 (output_bfd, |
4709 | (plt->output_section->vma | |
4710 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 4711 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4712 | return TRUE; |
4713 | } | |
0018b0a3 L |
4714 | } |
4715 | else if (info->shared | |
4716 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
dd5724d5 | 4717 | { |
6725bdbf | 4718 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
4719 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
4720 | } | |
252b5132 RH |
4721 | else |
4722 | { | |
dd5724d5 | 4723 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 4724 | do_glob_dat: |
6725bdbf | 4725 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4726 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
4727 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
4728 | } | |
4729 | ||
6de2ae4a L |
4730 | loc = htab->elf.srelgot->contents; |
4731 | loc += htab->elf.srelgot->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 4732 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 RH |
4733 | } |
4734 | ||
f5385ebf | 4735 | if (h->needs_copy) |
252b5132 | 4736 | { |
947216bf AM |
4737 | Elf_Internal_Rela rel; |
4738 | bfd_byte *loc; | |
252b5132 RH |
4739 | |
4740 | /* This symbol needs a copy reloc. Set it up. */ | |
4741 | ||
ffb2e45b AM |
4742 | if (h->dynindx == -1 |
4743 | || (h->root.type != bfd_link_hash_defined | |
4744 | && h->root.type != bfd_link_hash_defweak) | |
4745 | || htab->srelbss == NULL) | |
4746 | abort (); | |
252b5132 RH |
4747 | |
4748 | rel.r_offset = (h->root.u.def.value | |
4749 | + h->root.u.def.section->output_section->vma | |
4750 | + h->root.u.def.section->output_offset); | |
4751 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
947216bf AM |
4752 | loc = htab->srelbss->contents; |
4753 | loc += htab->srelbss->reloc_count++ * sizeof (Elf32_External_Rel); | |
0ac8d2ca | 4754 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 RH |
4755 | } |
4756 | ||
b34976b6 | 4757 | return TRUE; |
252b5132 RH |
4758 | } |
4759 | ||
c25bc9fc L |
4760 | /* Finish up local dynamic symbol handling. We set the contents of |
4761 | various dynamic sections here. */ | |
4762 | ||
4763 | static bfd_boolean | |
4764 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
4765 | { | |
4766 | struct elf_link_hash_entry *h | |
4767 | = (struct elf_link_hash_entry *) *slot; | |
4768 | struct bfd_link_info *info | |
23209a78 | 4769 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
4770 | |
4771 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
4772 | h, NULL); | |
4773 | } | |
4774 | ||
38701953 AM |
4775 | /* Used to decide how to sort relocs in an optimal manner for the |
4776 | dynamic linker, before writing them out. */ | |
4777 | ||
4778 | static enum elf_reloc_type_class | |
55fd94b0 | 4779 | elf_i386_reloc_type_class (const Elf_Internal_Rela *rela) |
38701953 | 4780 | { |
55fd94b0 | 4781 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 AM |
4782 | { |
4783 | case R_386_RELATIVE: | |
4784 | return reloc_class_relative; | |
4785 | case R_386_JUMP_SLOT: | |
4786 | return reloc_class_plt; | |
4787 | case R_386_COPY: | |
4788 | return reloc_class_copy; | |
4789 | default: | |
4790 | return reloc_class_normal; | |
4791 | } | |
4792 | } | |
4793 | ||
252b5132 RH |
4794 | /* Finish up the dynamic sections. */ |
4795 | ||
b34976b6 | 4796 | static bfd_boolean |
55fd94b0 AM |
4797 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
4798 | struct bfd_link_info *info) | |
252b5132 | 4799 | { |
6725bdbf | 4800 | struct elf_i386_link_hash_table *htab; |
252b5132 | 4801 | bfd *dynobj; |
252b5132 | 4802 | asection *sdyn; |
25e762b9 | 4803 | const struct elf_i386_backend_data *abed; |
252b5132 | 4804 | |
6725bdbf | 4805 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4806 | if (htab == NULL) |
4807 | return FALSE; | |
4808 | ||
ebe50bae | 4809 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4810 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 4811 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 4812 | |
ebe50bae | 4813 | if (htab->elf.dynamic_sections_created) |
252b5132 | 4814 | { |
252b5132 RH |
4815 | Elf32_External_Dyn *dyncon, *dynconend; |
4816 | ||
6de2ae4a | 4817 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 4818 | abort (); |
252b5132 RH |
4819 | |
4820 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 4821 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
4822 | for (; dyncon < dynconend; dyncon++) |
4823 | { | |
4824 | Elf_Internal_Dyn dyn; | |
51b64d56 | 4825 | asection *s; |
252b5132 RH |
4826 | |
4827 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4828 | ||
4829 | switch (dyn.d_tag) | |
4830 | { | |
4831 | default: | |
25e762b9 RM |
4832 | if (abed->is_vxworks |
4833 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 4834 | break; |
0ac8d2ca | 4835 | continue; |
252b5132 RH |
4836 | |
4837 | case DT_PLTGOT: | |
6de2ae4a | 4838 | s = htab->elf.sgotplt; |
8c37241b | 4839 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
4840 | break; |
4841 | ||
252b5132 | 4842 | case DT_JMPREL: |
6de2ae4a | 4843 | s = htab->elf.srelplt; |
6348e046 | 4844 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
4845 | break; |
4846 | ||
4847 | case DT_PLTRELSZ: | |
6de2ae4a | 4848 | s = htab->elf.srelplt; |
eea6121a | 4849 | dyn.d_un.d_val = s->size; |
252b5132 RH |
4850 | break; |
4851 | ||
4852 | case DT_RELSZ: | |
4853 | /* My reading of the SVR4 ABI indicates that the | |
4854 | procedure linkage table relocs (DT_JMPREL) should be | |
4855 | included in the overall relocs (DT_REL). This is | |
4856 | what Solaris does. However, UnixWare can not handle | |
4857 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 | 4858 | here to make it not include the JMPREL relocs. */ |
6de2ae4a | 4859 | s = htab->elf.srelplt; |
6348e046 AM |
4860 | if (s == NULL) |
4861 | continue; | |
eea6121a | 4862 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
4863 | break; |
4864 | ||
4865 | case DT_REL: | |
4866 | /* We may not be using the standard ELF linker script. | |
4867 | If .rel.plt is the first .rel section, we adjust | |
4868 | DT_REL to not include it. */ | |
6de2ae4a | 4869 | s = htab->elf.srelplt; |
6348e046 AM |
4870 | if (s == NULL) |
4871 | continue; | |
4872 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
4873 | continue; | |
eea6121a | 4874 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
4875 | break; |
4876 | } | |
0ac8d2ca AM |
4877 | |
4878 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
4879 | } |
4880 | ||
4881 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 4882 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 RH |
4883 | { |
4884 | if (info->shared) | |
eac338cf | 4885 | { |
25e762b9 RM |
4886 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
4887 | abed->plt->plt0_entry_size); | |
4888 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
4889 | abed->plt0_pad_byte, | |
4890 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 4891 | } |
252b5132 RH |
4892 | else |
4893 | { | |
25e762b9 RM |
4894 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
4895 | abed->plt->plt0_entry_size); | |
4896 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
4897 | abed->plt0_pad_byte, | |
4898 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 4899 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4900 | (htab->elf.sgotplt->output_section->vma |
4901 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 4902 | + 4), |
25e762b9 RM |
4903 | htab->elf.splt->contents |
4904 | + abed->plt->plt0_got1_offset); | |
252b5132 | 4905 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4906 | (htab->elf.sgotplt->output_section->vma |
4907 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 4908 | + 8), |
25e762b9 RM |
4909 | htab->elf.splt->contents |
4910 | + abed->plt->plt0_got2_offset); | |
eac338cf | 4911 | |
25e762b9 | 4912 | if (abed->is_vxworks) |
eac338cf PB |
4913 | { |
4914 | Elf_Internal_Rela rel; | |
7325306f | 4915 | |
eac338cf PB |
4916 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
4917 | On IA32 we use REL relocations so the addend goes in | |
4918 | the PLT directly. */ | |
6de2ae4a L |
4919 | rel.r_offset = (htab->elf.splt->output_section->vma |
4920 | + htab->elf.splt->output_offset | |
25e762b9 | 4921 | + abed->plt->plt0_got1_offset); |
7325306f | 4922 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4923 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4924 | htab->srelplt2->contents); | |
4925 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
4926 | rel.r_offset = (htab->elf.splt->output_section->vma |
4927 | + htab->elf.splt->output_offset | |
25e762b9 | 4928 | + abed->plt->plt0_got2_offset); |
7325306f | 4929 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4930 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4931 | htab->srelplt2->contents + | |
4932 | sizeof (Elf32_External_Rel)); | |
4933 | } | |
252b5132 RH |
4934 | } |
4935 | ||
4936 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
4937 | really seem like the right value. */ | |
6de2ae4a | 4938 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 4939 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
4940 | |
4941 | /* Correct the .rel.plt.unloaded relocations. */ | |
25e762b9 | 4942 | if (abed->is_vxworks && !info->shared) |
eac338cf | 4943 | { |
25e762b9 RM |
4944 | int num_plts = (htab->elf.splt->size |
4945 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 4946 | unsigned char *p; |
eac338cf PB |
4947 | |
4948 | p = htab->srelplt2->contents; | |
4949 | if (info->shared) | |
4950 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
4951 | else | |
4952 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
4953 | ||
4954 | for (; num_plts; num_plts--) | |
4955 | { | |
4956 | Elf_Internal_Rela rel; | |
4957 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 4958 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4959 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4960 | p += sizeof (Elf32_External_Rel); | |
4961 | ||
4962 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 4963 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
4964 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4965 | p += sizeof (Elf32_External_Rel); | |
4966 | } | |
4967 | } | |
252b5132 RH |
4968 | } |
4969 | } | |
4970 | ||
6de2ae4a | 4971 | if (htab->elf.sgotplt) |
252b5132 | 4972 | { |
56d4289c L |
4973 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4974 | { | |
4975 | (*_bfd_error_handler) | |
4976 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
4977 | return FALSE; | |
4978 | } | |
4979 | ||
12d0ee4a | 4980 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4981 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
4982 | { |
4983 | bfd_put_32 (output_bfd, | |
55fd94b0 | 4984 | (sdyn == NULL ? 0 |
12d0ee4a | 4985 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
4986 | htab->elf.sgotplt->contents); |
4987 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
4988 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 4989 | } |
252b5132 | 4990 | |
6de2ae4a | 4991 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 4992 | } |
8c37241b | 4993 | |
e41b3a13 | 4994 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4995 | if (htab->plt_eh_frame != NULL |
4996 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4997 | { |
4998 | if (htab->elf.splt != NULL | |
4999 | && htab->elf.splt->size != 0 | |
5000 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
5001 | && htab->elf.splt->output_section != NULL | |
5002 | && htab->plt_eh_frame->output_section != NULL) | |
5003 | { | |
5004 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
5005 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
5006 | + htab->plt_eh_frame->output_offset | |
5007 | + PLT_FDE_START_OFFSET; | |
5008 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
5009 | htab->plt_eh_frame->contents | |
5010 | + PLT_FDE_START_OFFSET); | |
5011 | } | |
5012 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 5013 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
5014 | { |
5015 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
5016 | htab->plt_eh_frame, | |
5017 | htab->plt_eh_frame->contents)) | |
5018 | return FALSE; | |
5019 | } | |
5020 | } | |
5021 | ||
6de2ae4a L |
5022 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
5023 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 5024 | |
c25bc9fc L |
5025 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
5026 | htab_traverse (htab->loc_hash_table, | |
5027 | elf_i386_finish_local_dynamic_symbol, | |
5028 | info); | |
5029 | ||
b34976b6 | 5030 | return TRUE; |
252b5132 RH |
5031 | } |
5032 | ||
4c45e5c9 JJ |
5033 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
5034 | or (bfd_vma) -1 if it should not be included. */ | |
5035 | ||
5036 | static bfd_vma | |
5037 | elf_i386_plt_sym_val (bfd_vma i, const asection *plt, | |
5038 | const arelent *rel ATTRIBUTE_UNUSED) | |
5039 | { | |
25e762b9 | 5040 | return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner); |
4c45e5c9 JJ |
5041 | } |
5042 | ||
fdc90cb4 JJ |
5043 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
5044 | ||
5045 | static bfd_boolean | |
5046 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
5047 | { | |
5048 | if (h->plt.offset != (bfd_vma) -1 | |
5049 | && !h->def_regular | |
5050 | && !h->pointer_equality_needed) | |
5051 | return FALSE; | |
5052 | ||
5053 | return _bfd_elf_hash_symbol (h); | |
5054 | } | |
4c45e5c9 | 5055 | |
d8045f23 NC |
5056 | /* Hook called by the linker routine which adds symbols from an object |
5057 | file. */ | |
5058 | ||
5059 | static bfd_boolean | |
c16153ae | 5060 | elf_i386_add_symbol_hook (bfd * abfd, |
d8045f23 NC |
5061 | struct bfd_link_info * info ATTRIBUTE_UNUSED, |
5062 | Elf_Internal_Sym * sym, | |
5063 | const char ** namep ATTRIBUTE_UNUSED, | |
5064 | flagword * flagsp ATTRIBUTE_UNUSED, | |
5065 | asection ** secp ATTRIBUTE_UNUSED, | |
5066 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
5067 | { | |
c16153ae | 5068 | if ((abfd->flags & DYNAMIC) == 0 |
f64b2e8d NC |
5069 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
5070 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) | |
5071 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; | |
d8045f23 NC |
5072 | |
5073 | return TRUE; | |
5074 | } | |
5075 | ||
252b5132 RH |
5076 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec |
5077 | #define TARGET_LITTLE_NAME "elf32-i386" | |
5078 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5079 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
5080 | #define ELF_MACHINE_CODE EM_386 |
5081 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
5082 | |
5083 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5084 | #define elf_backend_can_refcount 1 |
252b5132 RH |
5085 | #define elf_backend_want_got_plt 1 |
5086 | #define elf_backend_plt_readonly 1 | |
5087 | #define elf_backend_want_plt_sym 0 | |
5088 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 5089 | #define elf_backend_plt_alignment 4 |
252b5132 | 5090 | |
8c29f035 AM |
5091 | /* Support RELA for objdump of prelink objects. */ |
5092 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
5093 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
5094 | ||
13ae64f3 | 5095 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 5096 | |
dd5724d5 AM |
5097 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
5098 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
c25bc9fc | 5099 | #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free |
dd5724d5 | 5100 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 5101 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
dd5724d5 AM |
5102 | |
5103 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 5104 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 5105 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 5106 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 5107 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 5108 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
5109 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
5110 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
5111 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
5112 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
5113 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
5114 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 5115 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
5116 | #define elf_backend_relocate_section elf_i386_relocate_section |
5117 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 5118 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
5119 | #define elf_backend_omit_section_dynsym \ |
5120 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
4c45e5c9 | 5121 | #define elf_backend_plt_sym_val elf_i386_plt_sym_val |
fdc90cb4 | 5122 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
d8045f23 NC |
5123 | #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook |
5124 | #undef elf_backend_post_process_headers | |
5125 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
dd5724d5 | 5126 | |
252b5132 | 5127 | #include "elf32-target.h" |
2bc3c89a AM |
5128 | |
5129 | /* FreeBSD support. */ | |
5130 | ||
5131 | #undef TARGET_LITTLE_SYM | |
5132 | #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec | |
5133 | #undef TARGET_LITTLE_NAME | |
5134 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
5135 | #undef ELF_OSABI |
5136 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
5137 | |
5138 | /* The kernel recognizes executables as valid only if they carry a | |
5139 | "FreeBSD" label in the ELF header. So we put this label on all | |
5140 | executables and (for simplicity) also all other object files. */ | |
5141 | ||
2bc3c89a | 5142 | static void |
d8045f23 | 5143 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 5144 | { |
d8045f23 | 5145 | _bfd_elf_set_osabi (abfd, info); |
2bc3c89a | 5146 | |
2bc3c89a AM |
5147 | #ifdef OLD_FREEBSD_ABI_LABEL |
5148 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
5149 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
caf47ea6 | 5150 | #endif |
2bc3c89a AM |
5151 | } |
5152 | ||
5153 | #undef elf_backend_post_process_headers | |
d8045f23 | 5154 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
5155 | #undef elf32_bed |
5156 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 5157 | |
d8045f23 NC |
5158 | #undef elf_backend_add_symbol_hook |
5159 | ||
2bc3c89a | 5160 | #include "elf32-target.h" |
eac338cf | 5161 | |
a6cc6b3b RO |
5162 | /* Solaris 2. */ |
5163 | ||
5164 | #undef TARGET_LITTLE_SYM | |
5165 | #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec | |
5166 | #undef TARGET_LITTLE_NAME | |
5167 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
5168 | ||
5169 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5170 | objects won't be recognized. */ | |
5171 | #undef ELF_OSABI | |
5172 | ||
5173 | #undef elf32_bed | |
5174 | #define elf32_bed elf32_i386_sol2_bed | |
5175 | ||
7dc98aea RO |
5176 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
5177 | boundary. */ | |
5178 | #undef elf_backend_static_tls_alignment | |
5179 | #define elf_backend_static_tls_alignment 8 | |
5180 | ||
a6cc6b3b RO |
5181 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5182 | ||
5183 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5184 | File, p.63. */ | |
5185 | #undef elf_backend_want_plt_sym | |
5186 | #define elf_backend_want_plt_sym 1 | |
5187 | ||
5188 | #include "elf32-target.h" | |
5189 | ||
a27e4371 RM |
5190 | /* Native Client support. */ |
5191 | ||
5192 | #undef TARGET_LITTLE_SYM | |
5193 | #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec | |
5194 | #undef TARGET_LITTLE_NAME | |
5195 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
5196 | #undef elf32_bed | |
5197 | #define elf32_bed elf32_i386_nacl_bed | |
5198 | ||
5199 | #undef ELF_MAXPAGESIZE | |
5200 | #define ELF_MAXPAGESIZE 0x10000 | |
5201 | ||
5202 | /* Restore defaults. */ | |
5203 | #undef ELF_OSABI | |
5204 | #undef elf_backend_want_plt_sym | |
5205 | #define elf_backend_want_plt_sym 0 | |
5206 | #undef elf_backend_post_process_headers | |
5207 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
5208 | #undef elf_backend_static_tls_alignment | |
5209 | ||
5210 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5211 | ||
5212 | #undef elf_backend_plt_alignment | |
5213 | #define elf_backend_plt_alignment 5 | |
5214 | #define NACL_PLT_ENTRY_SIZE 64 | |
5215 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5216 | ||
5217 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
5218 | { | |
5219 | 0xff, 0x35, /* pushl contents of address */ | |
5220 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
5221 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5222 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
5223 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5224 | 0xff, 0xe1 /* jmp *%ecx */ | |
5225 | }; | |
5226 | ||
5227 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5228 | { | |
5229 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5230 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
5231 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5232 | 0xff, 0xe1, /* jmp *%ecx */ | |
5233 | ||
5234 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5235 | 0x90, | |
5236 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5237 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5238 | ||
5239 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5240 | 0x68, /* pushl immediate */ | |
5241 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
5242 | 0xe9, /* jmp relative */ | |
5243 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
5244 | ||
5245 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5246 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5247 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5248 | 0x90, 0x90 | |
5249 | }; | |
5250 | ||
5251 | static const bfd_byte | |
5252 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
5253 | { | |
5254 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
5255 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
5256 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
5257 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
5258 | |
5259 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
5260 | so pad to that size with nop instructions. */ | |
5261 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
5262 | }; |
5263 | ||
5264 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5265 | { | |
5266 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
5267 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
5268 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
5269 | 0xff, 0xe1, /* jmp *%ecx */ | |
5270 | ||
5271 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5272 | 0x90, | |
5273 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5274 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5275 | ||
5276 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5277 | 0x68, /* pushl immediate */ | |
5278 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
5279 | 0xe9, /* jmp relative */ | |
5280 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
5281 | ||
5282 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5283 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5284 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5285 | 0x90, 0x90 | |
5286 | }; | |
5287 | ||
5288 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
5289 | { | |
5290 | #if (PLT_CIE_LENGTH != 20 \ | |
5291 | || PLT_FDE_LENGTH != 36 \ | |
5292 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5293 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5294 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
5295 | #endif | |
5296 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5297 | 0, 0, 0, 0, /* CIE ID */ | |
5298 | 1, /* CIE version */ | |
5299 | 'z', 'R', 0, /* Augmentation string */ | |
5300 | 1, /* Code alignment factor */ | |
5301 | 0x7c, /* Data alignment factor: -4 */ | |
5302 | 8, /* Return address column */ | |
5303 | 1, /* Augmentation size */ | |
5304 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5305 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
5306 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
5307 | DW_CFA_nop, DW_CFA_nop, | |
5308 | ||
5309 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5310 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
5311 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
5312 | 0, 0, 0, 0, /* .plt size goes here */ | |
5313 | 0, /* Augmentation size */ | |
5314 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
5315 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5316 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
5317 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5318 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5319 | 13, /* Block length */ | |
5320 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
5321 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
5322 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5323 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
5324 | DW_CFA_nop, DW_CFA_nop | |
5325 | }; | |
5326 | ||
5327 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
5328 | { | |
5329 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
5330 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
5331 | 2, /* plt0_got1_offset */ | |
5332 | 8, /* plt0_got2_offset */ | |
5333 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
5334 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5335 | 2, /* plt_got_offset */ | |
5336 | 33, /* plt_reloc_offset */ | |
5337 | 38, /* plt_plt_offset */ | |
5338 | 32, /* plt_lazy_offset */ | |
5339 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
5340 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
5341 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5342 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
5343 | }; | |
5344 | ||
5345 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
5346 | { | |
5347 | &elf_i386_nacl_plt, /* plt */ | |
5348 | 0x90, /* plt0_pad_byte: nop insn */ | |
5349 | 0, /* is_vxworks */ | |
5350 | }; | |
5351 | ||
5352 | #undef elf_backend_arch_data | |
5353 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
5354 | ||
5a68afcf RM |
5355 | #undef elf_backend_modify_segment_map |
5356 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5357 | #undef elf_backend_modify_program_headers | |
5358 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
5359 | ||
a27e4371 RM |
5360 | #include "elf32-target.h" |
5361 | ||
5a68afcf RM |
5362 | /* Restore defaults. */ |
5363 | #undef elf_backend_modify_segment_map | |
5364 | #undef elf_backend_modify_program_headers | |
5365 | ||
eac338cf PB |
5366 | /* VxWorks support. */ |
5367 | ||
5368 | #undef TARGET_LITTLE_SYM | |
5369 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec | |
5370 | #undef TARGET_LITTLE_NAME | |
5371 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 5372 | #undef ELF_OSABI |
a27e4371 RM |
5373 | #undef elf_backend_plt_alignment |
5374 | #define elf_backend_plt_alignment 4 | |
eac338cf | 5375 | |
23209a78 RM |
5376 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
5377 | { | |
25e762b9 | 5378 | &elf_i386_plt, /* plt */ |
23209a78 RM |
5379 | 0x90, /* plt0_pad_byte */ |
5380 | 1, /* is_vxworks */ | |
5381 | }; | |
eac338cf | 5382 | |
23209a78 RM |
5383 | #undef elf_backend_arch_data |
5384 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 5385 | |
13285a1b AM |
5386 | #undef elf_backend_relocs_compatible |
5387 | #undef elf_backend_post_process_headers | |
eac338cf PB |
5388 | #undef elf_backend_add_symbol_hook |
5389 | #define elf_backend_add_symbol_hook \ | |
5390 | elf_vxworks_add_symbol_hook | |
5391 | #undef elf_backend_link_output_symbol_hook | |
5392 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 5393 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
5394 | #undef elf_backend_emit_relocs |
5395 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
5396 | #undef elf_backend_final_write_processing | |
5397 | #define elf_backend_final_write_processing \ | |
5398 | elf_vxworks_final_write_processing | |
7dc98aea | 5399 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
5400 | |
5401 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
5402 | define it. */ | |
5403 | #undef elf_backend_want_plt_sym | |
5404 | #define elf_backend_want_plt_sym 1 | |
5405 | ||
5406 | #undef elf32_bed | |
5407 | #define elf32_bed elf32_i386_vxworks_bed | |
5408 | ||
5409 | #include "elf32-target.h" |