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 | ||
ad1e85de L |
1520 | /* It is referenced by a non-shared object. */ |
1521 | h->ref_regular = 1; | |
71cb9464 | 1522 | } |
252b5132 | 1523 | |
142411ca L |
1524 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1525 | symtab_hdr, sym_hashes, | |
1526 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1527 | rel, rel_end, h, r_symndx)) |
c2e61a4e | 1528 | return FALSE; |
13ae64f3 JJ |
1529 | |
1530 | switch (r_type) | |
252b5132 | 1531 | { |
37e55690 JJ |
1532 | case R_386_TLS_LDM: |
1533 | htab->tls_ldm_got.refcount += 1; | |
1534 | goto create_got; | |
1535 | ||
1536 | case R_386_PLT32: | |
1537 | /* This symbol requires a procedure linkage table entry. We | |
1538 | actually build the entry in adjust_dynamic_symbol, | |
1539 | because this might be a case of linking PIC code which is | |
1540 | never referenced by a dynamic object, in which case we | |
1541 | don't need to generate a procedure linkage table entry | |
1542 | after all. */ | |
1543 | ||
1544 | /* If this is a local symbol, we resolve it directly without | |
1545 | creating a procedure linkage table entry. */ | |
1546 | if (h == NULL) | |
1547 | continue; | |
1548 | ||
f5385ebf | 1549 | h->needs_plt = 1; |
37e55690 JJ |
1550 | h->plt.refcount += 1; |
1551 | break; | |
1552 | ||
13ae64f3 | 1553 | case R_386_TLS_IE_32: |
37e55690 JJ |
1554 | case R_386_TLS_IE: |
1555 | case R_386_TLS_GOTIE: | |
1d85728f | 1556 | if (!info->executable) |
13ae64f3 | 1557 | info->flags |= DF_STATIC_TLS; |
37e55690 JJ |
1558 | /* Fall through */ |
1559 | ||
252b5132 | 1560 | case R_386_GOT32: |
13ae64f3 | 1561 | case R_386_TLS_GD: |
67a4f2b7 AO |
1562 | case R_386_TLS_GOTDESC: |
1563 | case R_386_TLS_DESC_CALL: | |
252b5132 | 1564 | /* This symbol requires a global offset table entry. */ |
13ae64f3 JJ |
1565 | { |
1566 | int tls_type, old_tls_type; | |
1567 | ||
1568 | switch (r_type) | |
1569 | { | |
1570 | default: | |
1571 | case R_386_GOT32: tls_type = GOT_NORMAL; break; | |
1572 | case R_386_TLS_GD: tls_type = GOT_TLS_GD; break; | |
67a4f2b7 AO |
1573 | case R_386_TLS_GOTDESC: |
1574 | case R_386_TLS_DESC_CALL: | |
1575 | tls_type = GOT_TLS_GDESC; break; | |
37e55690 JJ |
1576 | case R_386_TLS_IE_32: |
1577 | if (ELF32_R_TYPE (rel->r_info) == r_type) | |
1578 | tls_type = GOT_TLS_IE_NEG; | |
1579 | else | |
ebcfb3c0 JJ |
1580 | /* If this is a GD->IE transition, we may use either of |
1581 | R_386_TLS_TPOFF and R_386_TLS_TPOFF32. */ | |
37e55690 JJ |
1582 | tls_type = GOT_TLS_IE; |
1583 | break; | |
1584 | case R_386_TLS_IE: | |
1585 | case R_386_TLS_GOTIE: | |
1586 | tls_type = GOT_TLS_IE_POS; break; | |
13ae64f3 JJ |
1587 | } |
1588 | ||
1589 | if (h != NULL) | |
1590 | { | |
1591 | h->got.refcount += 1; | |
1592 | old_tls_type = elf_i386_hash_entry(h)->tls_type; | |
1593 | } | |
1594 | else | |
1595 | { | |
1596 | bfd_signed_vma *local_got_refcounts; | |
1597 | ||
1598 | /* This is a global offset table entry for a local symbol. */ | |
1599 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1600 | if (local_got_refcounts == NULL) | |
1601 | { | |
1602 | bfd_size_type size; | |
1603 | ||
1604 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1605 | size *= (sizeof (bfd_signed_vma) |
1606 | + sizeof (bfd_vma) + sizeof(char)); | |
a50b1753 NC |
1607 | local_got_refcounts = (bfd_signed_vma *) |
1608 | bfd_zalloc (abfd, size); | |
13ae64f3 | 1609 | if (local_got_refcounts == NULL) |
c2e61a4e | 1610 | return FALSE; |
13ae64f3 | 1611 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
1612 | elf_i386_local_tlsdesc_gotent (abfd) |
1613 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
13ae64f3 | 1614 | elf_i386_local_got_tls_type (abfd) |
67a4f2b7 | 1615 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
13ae64f3 JJ |
1616 | } |
1617 | local_got_refcounts[r_symndx] += 1; | |
1618 | old_tls_type = elf_i386_local_got_tls_type (abfd) [r_symndx]; | |
1619 | } | |
1620 | ||
37e55690 JJ |
1621 | if ((old_tls_type & GOT_TLS_IE) && (tls_type & GOT_TLS_IE)) |
1622 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1623 | /* If a TLS symbol is accessed using IE at least once, |
1624 | there is no point to use dynamic model for it. */ | |
ebcfb3c0 | 1625 | else if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN |
67a4f2b7 | 1626 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
37e55690 | 1627 | || (tls_type & GOT_TLS_IE) == 0)) |
13ae64f3 | 1628 | { |
67a4f2b7 | 1629 | if ((old_tls_type & GOT_TLS_IE) && GOT_TLS_GD_ANY_P (tls_type)) |
37e55690 | 1630 | tls_type = old_tls_type; |
67a4f2b7 AO |
1631 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1632 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1633 | tls_type |= old_tls_type; | |
13ae64f3 JJ |
1634 | else |
1635 | { | |
09a24cbf | 1636 | if (h) |
4c544807 L |
1637 | name = h->root.root.string; |
1638 | else | |
1639 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1640 | NULL); | |
13ae64f3 | 1641 | (*_bfd_error_handler) |
d003868e | 1642 | (_("%B: `%s' accessed both as normal and " |
55fd94b0 | 1643 | "thread local symbol"), |
4c544807 | 1644 | abfd, name); |
c2e61a4e | 1645 | return FALSE; |
13ae64f3 JJ |
1646 | } |
1647 | } | |
1648 | ||
1649 | if (old_tls_type != tls_type) | |
1650 | { | |
1651 | if (h != NULL) | |
1652 | elf_i386_hash_entry (h)->tls_type = tls_type; | |
1653 | else | |
1654 | elf_i386_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
1655 | } | |
1656 | } | |
0ac8d2ca AM |
1657 | /* Fall through */ |
1658 | ||
1659 | case R_386_GOTOFF: | |
1660 | case R_386_GOTPC: | |
13ae64f3 | 1661 | create_got: |
6de2ae4a | 1662 | if (htab->elf.sgot == NULL) |
0ac8d2ca AM |
1663 | { |
1664 | if (htab->elf.dynobj == NULL) | |
1665 | htab->elf.dynobj = abfd; | |
6de2ae4a | 1666 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, info)) |
c2e61a4e | 1667 | return FALSE; |
0ac8d2ca | 1668 | } |
37e55690 JJ |
1669 | if (r_type != R_386_TLS_IE) |
1670 | break; | |
1671 | /* Fall through */ | |
252b5132 | 1672 | |
37e55690 JJ |
1673 | case R_386_TLS_LE_32: |
1674 | case R_386_TLS_LE: | |
1d85728f | 1675 | if (info->executable) |
37e55690 | 1676 | break; |
bffbf940 | 1677 | info->flags |= DF_STATIC_TLS; |
b34976b6 | 1678 | /* Fall through */ |
252b5132 RH |
1679 | |
1680 | case R_386_32: | |
1681 | case R_386_PC32: | |
710ab287 | 1682 | if (h != NULL && info->executable) |
6725bdbf | 1683 | { |
12d0ee4a | 1684 | /* If this reloc is in a read-only section, we might |
ebe50bae AM |
1685 | need a copy reloc. We can't check reliably at this |
1686 | stage whether the section is read-only, as input | |
1687 | sections have not yet been mapped to output sections. | |
1688 | Tentatively set the flag for now, and correct in | |
1689 | adjust_dynamic_symbol. */ | |
f5385ebf | 1690 | h->non_got_ref = 1; |
12d0ee4a AM |
1691 | |
1692 | /* We may need a .plt entry if the function this reloc | |
1693 | refers to is in a shared lib. */ | |
51b64d56 | 1694 | h->plt.refcount += 1; |
c6585bbb | 1695 | if (r_type != R_386_PC32) |
f5385ebf | 1696 | h->pointer_equality_needed = 1; |
6725bdbf | 1697 | } |
7843f00e | 1698 | |
252b5132 | 1699 | /* If we are creating a shared library, and this is a reloc |
f69da49f AM |
1700 | against a global symbol, or a non PC relative reloc |
1701 | against a local symbol, then we need to copy the reloc | |
1702 | into the shared library. However, if we are linking with | |
1703 | -Bsymbolic, we do not need to copy a reloc against a | |
1704 | global symbol which is defined in an object we are | |
1705 | including in the link (i.e., DEF_REGULAR is set). At | |
1706 | this point we have not seen all the input files, so it is | |
1707 | possible that DEF_REGULAR is not set now but will be set | |
1f655a09 L |
1708 | later (it is never cleared). In case of a weak definition, |
1709 | DEF_REGULAR may be cleared later by a strong definition in | |
ebe50bae | 1710 | a shared library. We account for that possibility below by |
1f655a09 L |
1711 | storing information in the relocs_copied field of the hash |
1712 | table entry. A similar situation occurs when creating | |
1713 | shared libraries and symbol visibility changes render the | |
12d0ee4a | 1714 | symbol local. |
56882138 | 1715 | |
12d0ee4a AM |
1716 | If on the other hand, we are creating an executable, we |
1717 | may need to keep relocations for symbols satisfied by a | |
1718 | dynamic library if we manage to avoid copy relocs for the | |
1719 | symbol. */ | |
1720 | if ((info->shared | |
1721 | && (sec->flags & SEC_ALLOC) != 0 | |
13ae64f3 | 1722 | && (r_type != R_386_PC32 |
12d0ee4a | 1723 | || (h != NULL |
55255dae | 1724 | && (! SYMBOLIC_BIND (info, h) |
12d0ee4a | 1725 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1726 | || !h->def_regular)))) |
a23b6845 AM |
1727 | || (ELIMINATE_COPY_RELOCS |
1728 | && !info->shared | |
12d0ee4a AM |
1729 | && (sec->flags & SEC_ALLOC) != 0 |
1730 | && h != NULL | |
12d0ee4a | 1731 | && (h->root.type == bfd_link_hash_defweak |
0f88be7a | 1732 | || !h->def_regular))) |
252b5132 | 1733 | { |
e03a8ed8 L |
1734 | struct elf_dyn_relocs *p; |
1735 | struct elf_dyn_relocs **head; | |
ec338859 | 1736 | |
12d0ee4a AM |
1737 | /* We must copy these reloc types into the output file. |
1738 | Create a reloc section in dynobj and make room for | |
1739 | this reloc. */ | |
252b5132 RH |
1740 | if (sreloc == NULL) |
1741 | { | |
0ac8d2ca AM |
1742 | if (htab->elf.dynobj == NULL) |
1743 | htab->elf.dynobj = abfd; | |
1744 | ||
83bac4b0 NC |
1745 | sreloc = _bfd_elf_make_dynamic_reloc_section |
1746 | (sec, htab->elf.dynobj, 2, abfd, /*rela?*/ FALSE); | |
1747 | ||
252b5132 | 1748 | if (sreloc == NULL) |
c2e61a4e | 1749 | return FALSE; |
252b5132 RH |
1750 | } |
1751 | ||
0c715baa AM |
1752 | /* If this is a global symbol, we count the number of |
1753 | relocations we need for this symbol. */ | |
1754 | if (h != NULL) | |
252b5132 | 1755 | { |
ec338859 | 1756 | head = &((struct elf_i386_link_hash_entry *) h)->dyn_relocs; |
0c715baa AM |
1757 | } |
1758 | else | |
1759 | { | |
ec338859 AM |
1760 | /* Track dynamic relocs needed for local syms too. |
1761 | We really need local syms available to do this | |
1762 | easily. Oh well. */ | |
87d72d41 | 1763 | void **vpp; |
ec338859 | 1764 | asection *s; |
87d72d41 AM |
1765 | |
1766 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1767 | abfd, r_symndx); | |
1768 | if (isym == NULL) | |
1769 | return FALSE; | |
1770 | ||
1771 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
ec338859 | 1772 | if (s == NULL) |
87d72d41 | 1773 | s = sec; |
ec338859 | 1774 | |
e81d3500 | 1775 | vpp = &elf_section_data (s)->local_dynrel; |
e03a8ed8 | 1776 | head = (struct elf_dyn_relocs **)vpp; |
ec338859 AM |
1777 | } |
1778 | ||
1779 | p = *head; | |
1780 | if (p == NULL || p->sec != sec) | |
1781 | { | |
1782 | bfd_size_type amt = sizeof *p; | |
a50b1753 NC |
1783 | p = (struct elf_dyn_relocs *) bfd_alloc (htab->elf.dynobj, |
1784 | amt); | |
ec338859 | 1785 | if (p == NULL) |
c2e61a4e | 1786 | return FALSE; |
ec338859 AM |
1787 | p->next = *head; |
1788 | *head = p; | |
1789 | p->sec = sec; | |
1790 | p->count = 0; | |
1791 | p->pc_count = 0; | |
252b5132 | 1792 | } |
ec338859 AM |
1793 | |
1794 | p->count += 1; | |
13ae64f3 | 1795 | if (r_type == R_386_PC32) |
ec338859 | 1796 | p->pc_count += 1; |
252b5132 | 1797 | } |
252b5132 RH |
1798 | break; |
1799 | ||
1800 | /* This relocation describes the C++ object vtable hierarchy. | |
1801 | Reconstruct it for later use during GC. */ | |
1802 | case R_386_GNU_VTINHERIT: | |
d17e0c6e | 1803 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1804 | return FALSE; |
252b5132 RH |
1805 | break; |
1806 | ||
1807 | /* This relocation describes which C++ vtable entries are actually | |
1808 | used. Record for later use during GC. */ | |
1809 | case R_386_GNU_VTENTRY: | |
c6aa130f MS |
1810 | BFD_ASSERT (h != NULL); |
1811 | if (h != NULL | |
1812 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_offset)) | |
c2e61a4e | 1813 | return FALSE; |
252b5132 RH |
1814 | break; |
1815 | ||
1816 | default: | |
1817 | break; | |
1818 | } | |
1819 | } | |
1820 | ||
b34976b6 | 1821 | return TRUE; |
252b5132 RH |
1822 | } |
1823 | ||
1824 | /* Return the section that should be marked against GC for a given | |
1825 | relocation. */ | |
1826 | ||
1827 | static asection * | |
55fd94b0 | 1828 | elf_i386_gc_mark_hook (asection *sec, |
07adf181 | 1829 | struct bfd_link_info *info, |
55fd94b0 AM |
1830 | Elf_Internal_Rela *rel, |
1831 | struct elf_link_hash_entry *h, | |
1832 | Elf_Internal_Sym *sym) | |
252b5132 RH |
1833 | { |
1834 | if (h != NULL) | |
07adf181 AM |
1835 | switch (ELF32_R_TYPE (rel->r_info)) |
1836 | { | |
1837 | case R_386_GNU_VTINHERIT: | |
1838 | case R_386_GNU_VTENTRY: | |
1839 | return NULL; | |
1840 | } | |
1841 | ||
1842 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
252b5132 RH |
1843 | } |
1844 | ||
1845 | /* Update the got entry reference counts for the section being removed. */ | |
1846 | ||
b34976b6 | 1847 | static bfd_boolean |
55fd94b0 AM |
1848 | elf_i386_gc_sweep_hook (bfd *abfd, |
1849 | struct bfd_link_info *info, | |
1850 | asection *sec, | |
1851 | const Elf_Internal_Rela *relocs) | |
252b5132 | 1852 | { |
4dfe6ac6 | 1853 | struct elf_i386_link_hash_table *htab; |
dd5724d5 AM |
1854 | Elf_Internal_Shdr *symtab_hdr; |
1855 | struct elf_link_hash_entry **sym_hashes; | |
1856 | bfd_signed_vma *local_got_refcounts; | |
1857 | const Elf_Internal_Rela *rel, *relend; | |
dd5724d5 | 1858 | |
7dda2462 TG |
1859 | if (info->relocatable) |
1860 | return TRUE; | |
1861 | ||
4dfe6ac6 NC |
1862 | htab = elf_i386_hash_table (info); |
1863 | if (htab == NULL) | |
1864 | return FALSE; | |
1865 | ||
ec338859 | 1866 | elf_section_data (sec)->local_dynrel = NULL; |
dd5724d5 | 1867 | |
0ffa91dd | 1868 | symtab_hdr = &elf_symtab_hdr (abfd); |
6725bdbf AM |
1869 | sym_hashes = elf_sym_hashes (abfd); |
1870 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
dd5724d5 AM |
1871 | |
1872 | relend = relocs + sec->reloc_count; | |
1873 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1874 | { |
1875 | unsigned long r_symndx; | |
1876 | unsigned int r_type; | |
1877 | struct elf_link_hash_entry *h = NULL; | |
37e55690 | 1878 | |
26e41594 AM |
1879 | r_symndx = ELF32_R_SYM (rel->r_info); |
1880 | if (r_symndx >= symtab_hdr->sh_info) | |
1881 | { | |
26e41594 | 1882 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1883 | while (h->root.type == bfd_link_hash_indirect |
1884 | || h->root.type == bfd_link_hash_warning) | |
1885 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1886 | } |
bb1cb422 L |
1887 | else |
1888 | { | |
1889 | /* A local symbol. */ | |
1890 | Elf_Internal_Sym *isym; | |
1891 | ||
1892 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1893 | abfd, r_symndx); | |
1894 | ||
1895 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1896 | if (isym != NULL | |
1897 | && ELF32_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) | |
1898 | { | |
1899 | h = elf_i386_get_local_sym_hash (htab, abfd, rel, FALSE); | |
1900 | if (h == NULL) | |
1901 | abort (); | |
1902 | } | |
1903 | } | |
0c715baa | 1904 | |
3db2e7dd L |
1905 | if (h) |
1906 | { | |
1907 | struct elf_i386_link_hash_entry *eh; | |
1908 | struct elf_dyn_relocs **pp; | |
1909 | struct elf_dyn_relocs *p; | |
1910 | ||
1911 | eh = (struct elf_i386_link_hash_entry *) h; | |
1912 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1913 | if (p->sec == sec) | |
1914 | { | |
1915 | /* Everything must go for SEC. */ | |
1916 | *pp = p->next; | |
1917 | break; | |
1918 | } | |
1919 | } | |
1920 | ||
26e41594 | 1921 | r_type = ELF32_R_TYPE (rel->r_info); |
142411ca L |
1922 | if (! elf_i386_tls_transition (info, abfd, sec, NULL, |
1923 | symtab_hdr, sym_hashes, | |
1924 | &r_type, GOT_UNKNOWN, | |
23209a78 | 1925 | rel, relend, h, r_symndx)) |
142411ca L |
1926 | return FALSE; |
1927 | ||
26e41594 AM |
1928 | switch (r_type) |
1929 | { | |
1930 | case R_386_TLS_LDM: | |
4dfe6ac6 NC |
1931 | if (htab->tls_ldm_got.refcount > 0) |
1932 | htab->tls_ldm_got.refcount -= 1; | |
26e41594 | 1933 | break; |
0c715baa | 1934 | |
26e41594 | 1935 | case R_386_TLS_GD: |
67a4f2b7 AO |
1936 | case R_386_TLS_GOTDESC: |
1937 | case R_386_TLS_DESC_CALL: | |
26e41594 AM |
1938 | case R_386_TLS_IE_32: |
1939 | case R_386_TLS_IE: | |
1940 | case R_386_TLS_GOTIE: | |
1941 | case R_386_GOT32: | |
1942 | if (h != NULL) | |
1943 | { | |
1944 | if (h->got.refcount > 0) | |
1945 | h->got.refcount -= 1; | |
bb1cb422 L |
1946 | if (h->type == STT_GNU_IFUNC) |
1947 | { | |
1948 | if (h->plt.refcount > 0) | |
1949 | h->plt.refcount -= 1; | |
1950 | } | |
26e41594 AM |
1951 | } |
1952 | else if (local_got_refcounts != NULL) | |
1953 | { | |
1954 | if (local_got_refcounts[r_symndx] > 0) | |
1955 | local_got_refcounts[r_symndx] -= 1; | |
1956 | } | |
1957 | break; | |
0c715baa | 1958 | |
26e41594 AM |
1959 | case R_386_32: |
1960 | case R_386_PC32: | |
3db2e7dd L |
1961 | if (info->shared |
1962 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
1963 | break; |
1964 | /* Fall through */ | |
6725bdbf | 1965 | |
26e41594 AM |
1966 | case R_386_PLT32: |
1967 | if (h != NULL) | |
1968 | { | |
1969 | if (h->plt.refcount > 0) | |
1970 | h->plt.refcount -= 1; | |
1971 | } | |
1972 | break; | |
dd5724d5 | 1973 | |
bb1cb422 L |
1974 | case R_386_GOTOFF: |
1975 | if (h != NULL && h->type == STT_GNU_IFUNC) | |
1976 | { | |
1977 | if (h->got.refcount > 0) | |
1978 | h->got.refcount -= 1; | |
1979 | if (h->plt.refcount > 0) | |
1980 | h->plt.refcount -= 1; | |
1981 | } | |
1982 | break; | |
1983 | ||
26e41594 AM |
1984 | default: |
1985 | break; | |
1986 | } | |
1987 | } | |
252b5132 | 1988 | |
b34976b6 | 1989 | return TRUE; |
252b5132 RH |
1990 | } |
1991 | ||
1992 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1993 | regular object. The current definition is in some section of the | |
1994 | dynamic object, but we're not including those sections. We have to | |
1995 | change the definition to something the rest of the link can | |
1996 | understand. */ | |
1997 | ||
b34976b6 | 1998 | static bfd_boolean |
55fd94b0 AM |
1999 | elf_i386_adjust_dynamic_symbol (struct bfd_link_info *info, |
2000 | struct elf_link_hash_entry *h) | |
252b5132 | 2001 | { |
6725bdbf | 2002 | struct elf_i386_link_hash_table *htab; |
252b5132 | 2003 | asection *s; |
5ca5bb35 L |
2004 | struct elf_i386_link_hash_entry *eh; |
2005 | struct elf_dyn_relocs *p; | |
252b5132 | 2006 | |
cbe950e9 L |
2007 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
2008 | if (h->type == STT_GNU_IFUNC) | |
2009 | { | |
73bcf233 L |
2010 | /* All local STT_GNU_IFUNC references must be treate as local |
2011 | calls via local PLT. */ | |
5ca5bb35 L |
2012 | if (h->ref_regular |
2013 | && SYMBOL_CALLS_LOCAL (info, h)) | |
2014 | { | |
73bcf233 | 2015 | bfd_size_type pc_count = 0, count = 0; |
5ca5bb35 L |
2016 | struct elf_dyn_relocs **pp; |
2017 | ||
2018 | eh = (struct elf_i386_link_hash_entry *) h; | |
2019 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2020 | { | |
2021 | pc_count += p->pc_count; | |
2022 | p->count -= p->pc_count; | |
2023 | p->pc_count = 0; | |
73bcf233 | 2024 | count += p->count; |
5ca5bb35 L |
2025 | if (p->count == 0) |
2026 | *pp = p->next; | |
2027 | else | |
2028 | pp = &p->next; | |
2029 | } | |
2030 | ||
73bcf233 | 2031 | if (pc_count || count) |
5ca5bb35 L |
2032 | { |
2033 | h->needs_plt = 1; | |
5ca5bb35 | 2034 | h->non_got_ref = 1; |
a5479e5f L |
2035 | if (h->plt.refcount <= 0) |
2036 | h->plt.refcount = 1; | |
2037 | else | |
2038 | h->plt.refcount += 1; | |
5ca5bb35 L |
2039 | } |
2040 | } | |
2041 | ||
cbe950e9 L |
2042 | if (h->plt.refcount <= 0) |
2043 | { | |
2044 | h->plt.offset = (bfd_vma) -1; | |
2045 | h->needs_plt = 0; | |
2046 | } | |
2047 | return TRUE; | |
2048 | } | |
2049 | ||
252b5132 RH |
2050 | /* If this is a function, put it in the procedure linkage table. We |
2051 | will fill in the contents of the procedure linkage table later, | |
2052 | when we know the address of the .got section. */ | |
2053 | if (h->type == STT_FUNC | |
f5385ebf | 2054 | || h->needs_plt) |
252b5132 | 2055 | { |
6725bdbf | 2056 | if (h->plt.refcount <= 0 |
9c7a29a3 AM |
2057 | || SYMBOL_CALLS_LOCAL (info, h) |
2058 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
2059 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
2060 | { |
2061 | /* This case can occur if we saw a PLT32 reloc in an input | |
dd5724d5 AM |
2062 | file, but the symbol was never referred to by a dynamic |
2063 | object, or if all references were garbage collected. In | |
2064 | such a case, we don't actually need to build a procedure | |
2065 | linkage table, and we can just do a PC32 reloc instead. */ | |
bbd7ec4a | 2066 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2067 | h->needs_plt = 0; |
252b5132 RH |
2068 | } |
2069 | ||
b34976b6 | 2070 | return TRUE; |
252b5132 | 2071 | } |
6725bdbf AM |
2072 | else |
2073 | /* It's possible that we incorrectly decided a .plt reloc was | |
2074 | needed for an R_386_PC32 reloc to a non-function sym in | |
2075 | check_relocs. We can't decide accurately between function and | |
2076 | non-function syms in check-relocs; Objects loaded later in | |
2077 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 2078 | h->plt.offset = (bfd_vma) -1; |
252b5132 RH |
2079 | |
2080 | /* If this is a weak symbol, and there is a real definition, the | |
2081 | processor independent code will have arranged for us to see the | |
2082 | real definition first, and we can just use the same value. */ | |
f6e332e6 | 2083 | if (h->u.weakdef != NULL) |
252b5132 | 2084 | { |
f6e332e6 AM |
2085 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
2086 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
2087 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
2088 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
a23b6845 | 2089 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 2090 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 2091 | return TRUE; |
252b5132 RH |
2092 | } |
2093 | ||
2094 | /* This is a reference to a symbol defined by a dynamic object which | |
2095 | is not a function. */ | |
2096 | ||
2097 | /* If we are creating a shared library, we must presume that the | |
2098 | only references to the symbol are via the global offset table. | |
2099 | For such cases we need not do anything here; the relocations will | |
2100 | be handled correctly by relocate_section. */ | |
2101 | if (info->shared) | |
b34976b6 | 2102 | return TRUE; |
252b5132 | 2103 | |
7843f00e ILT |
2104 | /* If there are no references to this symbol that do not use the |
2105 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 2106 | if (!h->non_got_ref) |
b34976b6 | 2107 | return TRUE; |
7843f00e | 2108 | |
8bd621d8 AM |
2109 | /* If -z nocopyreloc was given, we won't generate them either. */ |
2110 | if (info->nocopyreloc) | |
2111 | { | |
f5385ebf | 2112 | h->non_got_ref = 0; |
b34976b6 | 2113 | return TRUE; |
8bd621d8 AM |
2114 | } |
2115 | ||
643796e3 | 2116 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2117 | if (htab == NULL) |
2118 | return FALSE; | |
643796e3 DJ |
2119 | |
2120 | /* If there aren't any dynamic relocs in read-only sections, then | |
2121 | we can keep the dynamic relocs and avoid the copy reloc. This | |
2122 | doesn't work on VxWorks, where we can not have dynamic relocations | |
2123 | (other than copy and jump slot relocations) in an executable. */ | |
23209a78 RM |
2124 | if (ELIMINATE_COPY_RELOCS |
2125 | && !get_elf_i386_backend_data (info->output_bfd)->is_vxworks) | |
ebe50bae | 2126 | { |
a23b6845 AM |
2127 | eh = (struct elf_i386_link_hash_entry *) h; |
2128 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2129 | { | |
2130 | s = p->sec->output_section; | |
2131 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2132 | break; | |
2133 | } | |
2134 | ||
a23b6845 AM |
2135 | if (p == NULL) |
2136 | { | |
f5385ebf | 2137 | h->non_got_ref = 0; |
a23b6845 AM |
2138 | return TRUE; |
2139 | } | |
ebe50bae AM |
2140 | } |
2141 | ||
252b5132 RH |
2142 | /* We must allocate the symbol in our .dynbss section, which will |
2143 | become part of the .bss section of the executable. There will be | |
2144 | an entry for this symbol in the .dynsym section. The dynamic | |
2145 | object will contain position independent code, so all references | |
2146 | from the dynamic object to this symbol will go through the global | |
2147 | offset table. The dynamic linker will use the .dynsym entry to | |
2148 | determine the address it must put in the global offset table, so | |
2149 | both the dynamic object and the regular object will refer to the | |
2150 | same memory location for the variable. */ | |
2151 | ||
252b5132 RH |
2152 | /* We must generate a R_386_COPY reloc to tell the dynamic linker to |
2153 | copy the initial value out of the dynamic object and into the | |
0ac8d2ca | 2154 | runtime process image. */ |
1d7e9d18 | 2155 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0 && h->size != 0) |
252b5132 | 2156 | { |
eea6121a | 2157 | htab->srelbss->size += sizeof (Elf32_External_Rel); |
f5385ebf | 2158 | h->needs_copy = 1; |
252b5132 RH |
2159 | } |
2160 | ||
0ac8d2ca | 2161 | s = htab->sdynbss; |
252b5132 | 2162 | |
027297b7 | 2163 | return _bfd_elf_adjust_dynamic_copy (h, s); |
252b5132 RH |
2164 | } |
2165 | ||
6725bdbf | 2166 | /* Allocate space in .plt, .got and associated reloc sections for |
0c715baa | 2167 | dynamic relocs. */ |
6725bdbf | 2168 | |
b34976b6 | 2169 | static bfd_boolean |
eb4ff4d6 | 2170 | elf_i386_allocate_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
6725bdbf AM |
2171 | { |
2172 | struct bfd_link_info *info; | |
2173 | struct elf_i386_link_hash_table *htab; | |
5a15f56f | 2174 | struct elf_i386_link_hash_entry *eh; |
e03a8ed8 | 2175 | struct elf_dyn_relocs *p; |
25e762b9 | 2176 | unsigned plt_entry_size; |
6725bdbf | 2177 | |
e92d460e | 2178 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2179 | return TRUE; |
6725bdbf | 2180 | |
cbe950e9 | 2181 | eh = (struct elf_i386_link_hash_entry *) h; |
e92d460e | 2182 | |
6725bdbf AM |
2183 | info = (struct bfd_link_info *) inf; |
2184 | htab = elf_i386_hash_table (info); | |
4dfe6ac6 NC |
2185 | if (htab == NULL) |
2186 | return FALSE; | |
6725bdbf | 2187 | |
25e762b9 RM |
2188 | plt_entry_size = GET_PLT_ENTRY_SIZE (info->output_bfd); |
2189 | ||
cbe950e9 L |
2190 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2191 | here if it is defined and referenced in a non-shared object. */ | |
2192 | if (h->type == STT_GNU_IFUNC | |
2193 | && h->def_regular) | |
25e762b9 RM |
2194 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, &eh->dyn_relocs, |
2195 | plt_entry_size, 4); | |
cbe950e9 L |
2196 | else if (htab->elf.dynamic_sections_created |
2197 | && h->plt.refcount > 0) | |
6725bdbf | 2198 | { |
5a15f56f AM |
2199 | /* Make sure this symbol is output as a dynamic symbol. |
2200 | Undefined weak syms won't yet be marked as dynamic. */ | |
2201 | if (h->dynindx == -1 | |
f5385ebf | 2202 | && !h->forced_local) |
5a15f56f | 2203 | { |
c152c796 | 2204 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2205 | return FALSE; |
5a15f56f AM |
2206 | } |
2207 | ||
4e795f50 AM |
2208 | if (info->shared |
2209 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
ced53ee5 | 2210 | { |
6de2ae4a | 2211 | asection *s = htab->elf.splt; |
6725bdbf | 2212 | |
ced53ee5 AM |
2213 | /* If this is the first .plt entry, make room for the special |
2214 | first entry. */ | |
eea6121a | 2215 | if (s->size == 0) |
25e762b9 | 2216 | s->size += plt_entry_size; |
6725bdbf | 2217 | |
eea6121a | 2218 | h->plt.offset = s->size; |
6725bdbf | 2219 | |
ced53ee5 AM |
2220 | /* If this symbol is not defined in a regular file, and we are |
2221 | not generating a shared library, then set the symbol to this | |
2222 | location in the .plt. This is required to make function | |
2223 | pointers compare as equal between the normal executable and | |
2224 | the shared library. */ | |
2225 | if (! info->shared | |
f5385ebf | 2226 | && !h->def_regular) |
ced53ee5 AM |
2227 | { |
2228 | h->root.u.def.section = s; | |
2229 | h->root.u.def.value = h->plt.offset; | |
2230 | } | |
6725bdbf | 2231 | |
ced53ee5 | 2232 | /* Make room for this entry. */ |
25e762b9 | 2233 | s->size += plt_entry_size; |
6725bdbf | 2234 | |
ced53ee5 AM |
2235 | /* We also need to make an entry in the .got.plt section, which |
2236 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2237 | htab->elf.sgotplt->size += 4; |
6725bdbf | 2238 | |
6725bdbf | 2239 | /* We also need to make an entry in the .rel.plt section. */ |
6de2ae4a | 2240 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
e1f98742 | 2241 | htab->elf.srelplt->reloc_count++; |
eac338cf | 2242 | |
23209a78 RM |
2243 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks |
2244 | && !info->shared) | |
eac338cf PB |
2245 | { |
2246 | /* VxWorks has a second set of relocations for each PLT entry | |
2247 | in executables. They go in a separate relocation section, | |
2248 | which is processed by the kernel loader. */ | |
2249 | ||
2250 | /* There are two relocations for the initial PLT entry: an | |
2251 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 4 and an | |
2252 | R_386_32 relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
2253 | ||
25e762b9 | 2254 | if (h->plt.offset == plt_entry_size) |
eac338cf PB |
2255 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); |
2256 | ||
2257 | /* There are two extra relocations for each subsequent PLT entry: | |
2258 | an R_386_32 relocation for the GOT entry, and an R_386_32 | |
2259 | relocation for the PLT entry. */ | |
2260 | ||
2261 | htab->srelplt2->size += (sizeof (Elf32_External_Rel) * 2); | |
2262 | } | |
6725bdbf | 2263 | } |
ced53ee5 AM |
2264 | else |
2265 | { | |
51b64d56 | 2266 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2267 | h->needs_plt = 0; |
ced53ee5 | 2268 | } |
6725bdbf AM |
2269 | } |
2270 | else | |
2271 | { | |
51b64d56 | 2272 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 2273 | h->needs_plt = 0; |
6725bdbf AM |
2274 | } |
2275 | ||
67a4f2b7 AO |
2276 | eh->tlsdesc_got = (bfd_vma) -1; |
2277 | ||
37e55690 | 2278 | /* If R_386_TLS_{IE_32,IE,GOTIE} symbol is now local to the binary, |
13ae64f3 JJ |
2279 | make it a R_386_TLS_LE_32 requiring no TLS entry. */ |
2280 | if (h->got.refcount > 0 | |
1d85728f | 2281 | && info->executable |
13ae64f3 | 2282 | && h->dynindx == -1 |
37e55690 | 2283 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE)) |
cedb70c5 | 2284 | h->got.offset = (bfd_vma) -1; |
13ae64f3 | 2285 | else if (h->got.refcount > 0) |
6725bdbf | 2286 | { |
0ac8d2ca | 2287 | asection *s; |
b34976b6 | 2288 | bfd_boolean dyn; |
13ae64f3 | 2289 | int tls_type = elf_i386_hash_entry(h)->tls_type; |
6725bdbf | 2290 | |
5a15f56f AM |
2291 | /* Make sure this symbol is output as a dynamic symbol. |
2292 | Undefined weak syms won't yet be marked as dynamic. */ | |
2293 | if (h->dynindx == -1 | |
f5385ebf | 2294 | && !h->forced_local) |
5a15f56f | 2295 | { |
c152c796 | 2296 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2297 | return FALSE; |
5a15f56f AM |
2298 | } |
2299 | ||
6de2ae4a | 2300 | s = htab->elf.sgot; |
67a4f2b7 AO |
2301 | if (GOT_TLS_GDESC_P (tls_type)) |
2302 | { | |
6de2ae4a | 2303 | eh->tlsdesc_got = htab->elf.sgotplt->size |
67a4f2b7 | 2304 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2305 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2306 | h->got.offset = (bfd_vma) -2; |
2307 | } | |
2308 | if (! GOT_TLS_GDESC_P (tls_type) | |
2309 | || GOT_TLS_GD_P (tls_type)) | |
2310 | { | |
2311 | h->got.offset = s->size; | |
2312 | s->size += 4; | |
2313 | /* R_386_TLS_GD needs 2 consecutive GOT slots. */ | |
2314 | if (GOT_TLS_GD_P (tls_type) || tls_type == GOT_TLS_IE_BOTH) | |
2315 | s->size += 4; | |
2316 | } | |
ebe50bae | 2317 | dyn = htab->elf.dynamic_sections_created; |
13ae64f3 | 2318 | /* R_386_TLS_IE_32 needs one dynamic relocation, |
37e55690 JJ |
2319 | R_386_TLS_IE resp. R_386_TLS_GOTIE needs one dynamic relocation, |
2320 | (but if both R_386_TLS_IE_32 and R_386_TLS_IE is present, we | |
2321 | need two), R_386_TLS_GD needs one if local symbol and two if | |
2322 | global. */ | |
2323 | if (tls_type == GOT_TLS_IE_BOTH) | |
6de2ae4a | 2324 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 | 2325 | else if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
37e55690 | 2326 | || (tls_type & GOT_TLS_IE)) |
6de2ae4a | 2327 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2328 | else if (GOT_TLS_GD_P (tls_type)) |
6de2ae4a | 2329 | htab->elf.srelgot->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2330 | else if (! GOT_TLS_GDESC_P (tls_type) |
2331 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2332 | || h->root.type != bfd_link_hash_undefweak) | |
ef5aade5 L |
2333 | && (info->shared |
2334 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
6de2ae4a | 2335 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2336 | if (GOT_TLS_GDESC_P (tls_type)) |
6de2ae4a | 2337 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
6725bdbf AM |
2338 | } |
2339 | else | |
51b64d56 | 2340 | h->got.offset = (bfd_vma) -1; |
6725bdbf | 2341 | |
5a15f56f | 2342 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2343 | return TRUE; |
5a15f56f | 2344 | |
0c715baa AM |
2345 | /* In the shared -Bsymbolic case, discard space allocated for |
2346 | dynamic pc-relative relocs against symbols which turn out to be | |
2347 | defined in regular objects. For the normal shared case, discard | |
0ac8d2ca AM |
2348 | space for pc-relative relocs that have become local due to symbol |
2349 | visibility changes. */ | |
0c715baa AM |
2350 | |
2351 | if (info->shared) | |
5a15f56f | 2352 | { |
09695f56 AM |
2353 | /* The only reloc that uses pc_count is R_386_PC32, which will |
2354 | appear on a call or on something like ".long foo - .". We | |
2355 | want calls to protected symbols to resolve directly to the | |
2356 | function rather than going via the plt. If people want | |
2357 | function pointer comparisons to work as expected then they | |
2358 | should avoid writing assembly like ".long foo - .". */ | |
2359 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
5a15f56f | 2360 | { |
e03a8ed8 | 2361 | struct elf_dyn_relocs **pp; |
0c715baa AM |
2362 | |
2363 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2364 | { | |
2365 | p->count -= p->pc_count; | |
2366 | p->pc_count = 0; | |
2367 | if (p->count == 0) | |
2368 | *pp = p->next; | |
2369 | else | |
2370 | pp = &p->next; | |
2371 | } | |
5a15f56f | 2372 | } |
4e795f50 | 2373 | |
23209a78 | 2374 | if (get_elf_i386_backend_data (info->output_bfd)->is_vxworks) |
3348747a | 2375 | { |
e03a8ed8 | 2376 | struct elf_dyn_relocs **pp; |
3348747a NS |
2377 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) |
2378 | { | |
2379 | if (strcmp (p->sec->output_section->name, ".tls_vars") == 0) | |
2380 | *pp = p->next; | |
2381 | else | |
2382 | pp = &p->next; | |
2383 | } | |
2384 | } | |
2385 | ||
4e795f50 | 2386 | /* Also discard relocs on undefined weak syms with non-default |
3348747a | 2387 | visibility. */ |
22d606e9 | 2388 | if (eh->dyn_relocs != NULL |
4e795f50 | 2389 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2390 | { |
2391 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2392 | eh->dyn_relocs = NULL; | |
2393 | ||
2394 | /* Make sure undefined weak symbols are output as a dynamic | |
2395 | symbol in PIEs. */ | |
2396 | else if (h->dynindx == -1 | |
2397 | && !h->forced_local) | |
2398 | { | |
2399 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2400 | return FALSE; | |
2401 | } | |
2402 | } | |
0c715baa | 2403 | } |
a23b6845 | 2404 | else if (ELIMINATE_COPY_RELOCS) |
0c715baa AM |
2405 | { |
2406 | /* For the non-shared case, discard space for relocs against | |
2407 | symbols which turn out to need copy relocs or are not | |
2408 | dynamic. */ | |
2409 | ||
f5385ebf AM |
2410 | if (!h->non_got_ref |
2411 | && ((h->def_dynamic | |
2412 | && !h->def_regular) | |
ebe50bae | 2413 | || (htab->elf.dynamic_sections_created |
0c715baa AM |
2414 | && (h->root.type == bfd_link_hash_undefweak |
2415 | || h->root.type == bfd_link_hash_undefined)))) | |
2416 | { | |
2417 | /* Make sure this symbol is output as a dynamic symbol. | |
2418 | Undefined weak syms won't yet be marked as dynamic. */ | |
2419 | if (h->dynindx == -1 | |
f5385ebf | 2420 | && !h->forced_local) |
0c715baa | 2421 | { |
c152c796 | 2422 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2423 | return FALSE; |
0c715baa | 2424 | } |
5a15f56f | 2425 | |
0c715baa AM |
2426 | /* If that succeeded, we know we'll be keeping all the |
2427 | relocs. */ | |
2428 | if (h->dynindx != -1) | |
2429 | goto keep; | |
2430 | } | |
2431 | ||
2432 | eh->dyn_relocs = NULL; | |
2433 | ||
ec338859 | 2434 | keep: ; |
5a15f56f AM |
2435 | } |
2436 | ||
0c715baa AM |
2437 | /* Finally, allocate space. */ |
2438 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
12d0ee4a | 2439 | { |
e7c33416 NC |
2440 | asection *sreloc; |
2441 | ||
cbe950e9 | 2442 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2443 | |
2444 | BFD_ASSERT (sreloc != NULL); | |
eea6121a | 2445 | sreloc->size += p->count * sizeof (Elf32_External_Rel); |
12d0ee4a AM |
2446 | } |
2447 | ||
b34976b6 | 2448 | return TRUE; |
6725bdbf AM |
2449 | } |
2450 | ||
c25bc9fc L |
2451 | /* Allocate space in .plt, .got and associated reloc sections for |
2452 | local dynamic relocs. */ | |
2453 | ||
2454 | static bfd_boolean | |
2455 | elf_i386_allocate_local_dynrelocs (void **slot, void *inf) | |
2456 | { | |
2457 | struct elf_link_hash_entry *h | |
2458 | = (struct elf_link_hash_entry *) *slot; | |
2459 | ||
2460 | if (h->type != STT_GNU_IFUNC | |
2461 | || !h->def_regular | |
2462 | || !h->ref_regular | |
2463 | || !h->forced_local | |
2464 | || h->root.type != bfd_link_hash_defined) | |
2465 | abort (); | |
2466 | ||
2467 | return elf_i386_allocate_dynrelocs (h, inf); | |
2468 | } | |
2469 | ||
0c715baa AM |
2470 | /* Find any dynamic relocs that apply to read-only sections. */ |
2471 | ||
b34976b6 | 2472 | static bfd_boolean |
eb4ff4d6 | 2473 | elf_i386_readonly_dynrelocs (struct elf_link_hash_entry *h, void *inf) |
0c715baa AM |
2474 | { |
2475 | struct elf_i386_link_hash_entry *eh; | |
e03a8ed8 | 2476 | struct elf_dyn_relocs *p; |
0c715baa | 2477 | |
aa715242 L |
2478 | /* Skip local IFUNC symbols. */ |
2479 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2480 | return TRUE; | |
2481 | ||
0c715baa AM |
2482 | eh = (struct elf_i386_link_hash_entry *) h; |
2483 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2484 | { | |
2485 | asection *s = p->sec->output_section; | |
2486 | ||
2487 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2488 | { | |
2489 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2490 | ||
2491 | info->flags |= DF_TEXTREL; | |
2492 | ||
b70321a2 L |
2493 | if (info->warn_shared_textrel && info->shared) |
2494 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2495 | p->sec->owner, h->root.root.string, | |
2496 | p->sec); | |
2497 | ||
0c715baa | 2498 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2499 | return FALSE; |
0c715baa AM |
2500 | } |
2501 | } | |
b34976b6 | 2502 | return TRUE; |
0c715baa AM |
2503 | } |
2504 | ||
daa67607 L |
2505 | /* Convert |
2506 | mov foo@GOT(%reg), %reg | |
2507 | to | |
2508 | lea foo@GOTOFF(%reg), %reg | |
2509 | with the local symbol, foo. */ | |
2510 | ||
2511 | static bfd_boolean | |
2512 | elf_i386_convert_mov_to_lea (bfd *abfd, asection *sec, | |
2513 | struct bfd_link_info *link_info) | |
2514 | { | |
2515 | Elf_Internal_Shdr *symtab_hdr; | |
2516 | Elf_Internal_Rela *internal_relocs; | |
2517 | Elf_Internal_Rela *irel, *irelend; | |
2518 | bfd_byte *contents; | |
2519 | struct elf_i386_link_hash_table *htab; | |
2520 | bfd_boolean changed_contents; | |
2521 | bfd_boolean changed_relocs; | |
2522 | bfd_signed_vma *local_got_refcounts; | |
2523 | ||
2524 | /* Don't even try to convert non-ELF outputs. */ | |
2525 | if (!is_elf_hash_table (link_info->hash)) | |
2526 | return FALSE; | |
2527 | ||
fbdc86d9 | 2528 | /* Nothing to do if there are no codes, no relocations or no output. */ |
daa67607 | 2529 | if ((sec->flags & (SEC_CODE | SEC_RELOC)) != (SEC_CODE | SEC_RELOC) |
fbdc86d9 L |
2530 | || sec->reloc_count == 0 |
2531 | || discarded_section (sec)) | |
daa67607 L |
2532 | return TRUE; |
2533 | ||
2534 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
2535 | ||
2536 | /* Load the relocations for this section. */ | |
2537 | internal_relocs = (_bfd_elf_link_read_relocs | |
2538 | (abfd, sec, NULL, (Elf_Internal_Rela *) NULL, | |
2539 | link_info->keep_memory)); | |
2540 | if (internal_relocs == NULL) | |
2541 | return FALSE; | |
2542 | ||
2543 | htab = elf_i386_hash_table (link_info); | |
2544 | changed_contents = FALSE; | |
2545 | changed_relocs = FALSE; | |
2546 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
2547 | ||
2548 | /* Get the section contents. */ | |
2549 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
2550 | contents = elf_section_data (sec)->this_hdr.contents; | |
2551 | else | |
2552 | { | |
2553 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
2554 | goto error_return; | |
2555 | } | |
2556 | ||
2557 | irelend = internal_relocs + sec->reloc_count; | |
2558 | for (irel = internal_relocs; irel < irelend; irel++) | |
2559 | { | |
2560 | unsigned int r_type = ELF32_R_TYPE (irel->r_info); | |
2561 | unsigned int r_symndx = ELF32_R_SYM (irel->r_info); | |
2562 | unsigned int indx; | |
2563 | struct elf_link_hash_entry *h; | |
2564 | ||
2565 | if (r_type != R_386_GOT32) | |
2566 | continue; | |
2567 | ||
2568 | /* Get the symbol referred to by the reloc. */ | |
2569 | if (r_symndx < symtab_hdr->sh_info) | |
2570 | { | |
2571 | Elf_Internal_Sym *isym; | |
2572 | ||
2573 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
2574 | abfd, r_symndx); | |
2575 | ||
2576 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. */ | |
2577 | if (ELF_ST_TYPE (isym->st_info) != STT_GNU_IFUNC | |
2578 | && bfd_get_8 (input_bfd, | |
2579 | contents + irel->r_offset - 2) == 0x8b) | |
2580 | { | |
2581 | bfd_put_8 (output_bfd, 0x8d, | |
2582 | contents + irel->r_offset - 2); | |
2583 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2584 | if (local_got_refcounts != NULL | |
2585 | && local_got_refcounts[r_symndx] > 0) | |
2586 | local_got_refcounts[r_symndx] -= 1; | |
2587 | changed_contents = TRUE; | |
2588 | changed_relocs = TRUE; | |
2589 | } | |
2590 | continue; | |
2591 | } | |
2592 | ||
2593 | indx = r_symndx - symtab_hdr->sh_info; | |
2594 | h = elf_sym_hashes (abfd)[indx]; | |
2595 | BFD_ASSERT (h != NULL); | |
2596 | ||
2597 | while (h->root.type == bfd_link_hash_indirect | |
2598 | || h->root.type == bfd_link_hash_warning) | |
2599 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2600 | ||
3f65f599 L |
2601 | /* STT_GNU_IFUNC must keep R_386_GOT32 relocation. We also avoid |
2602 | optimizing _DYNAMIC since ld.so may use its link-time address. */ | |
daa67607 L |
2603 | if (h->def_regular |
2604 | && h->type != STT_GNU_IFUNC | |
9637f6ef | 2605 | && h != htab->elf.hdynamic |
daa67607 L |
2606 | && SYMBOL_REFERENCES_LOCAL (link_info, h) |
2607 | && bfd_get_8 (input_bfd, | |
2608 | contents + irel->r_offset - 2) == 0x8b) | |
2609 | { | |
2610 | bfd_put_8 (output_bfd, 0x8d, | |
2611 | contents + irel->r_offset - 2); | |
2612 | irel->r_info = ELF32_R_INFO (r_symndx, R_386_GOTOFF); | |
2613 | if (h->got.refcount > 0) | |
2614 | h->got.refcount -= 1; | |
2615 | changed_contents = TRUE; | |
2616 | changed_relocs = TRUE; | |
2617 | } | |
2618 | } | |
2619 | ||
2620 | if (contents != NULL | |
2621 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2622 | { | |
2623 | if (!changed_contents && !link_info->keep_memory) | |
2624 | free (contents); | |
2625 | else | |
2626 | { | |
2627 | /* Cache the section contents for elf_link_input_bfd. */ | |
2628 | elf_section_data (sec)->this_hdr.contents = contents; | |
2629 | } | |
2630 | } | |
2631 | ||
2632 | if (elf_section_data (sec)->relocs != internal_relocs) | |
2633 | { | |
2634 | if (!changed_relocs) | |
2635 | free (internal_relocs); | |
2636 | else | |
2637 | elf_section_data (sec)->relocs = internal_relocs; | |
2638 | } | |
2639 | ||
2640 | return TRUE; | |
2641 | ||
2642 | error_return: | |
2643 | if (contents != NULL | |
2644 | && elf_section_data (sec)->this_hdr.contents != contents) | |
2645 | free (contents); | |
2646 | if (internal_relocs != NULL | |
2647 | && elf_section_data (sec)->relocs != internal_relocs) | |
2648 | free (internal_relocs); | |
2649 | return FALSE; | |
2650 | } | |
2651 | ||
252b5132 RH |
2652 | /* Set the sizes of the dynamic sections. */ |
2653 | ||
b34976b6 | 2654 | static bfd_boolean |
23209a78 | 2655 | elf_i386_size_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
252b5132 | 2656 | { |
6725bdbf | 2657 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
2658 | bfd *dynobj; |
2659 | asection *s; | |
b34976b6 | 2660 | bfd_boolean relocs; |
0c715baa | 2661 | bfd *ibfd; |
252b5132 | 2662 | |
6725bdbf | 2663 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
2664 | if (htab == NULL) |
2665 | return FALSE; | |
ebe50bae | 2666 | dynobj = htab->elf.dynobj; |
ffb2e45b AM |
2667 | if (dynobj == NULL) |
2668 | abort (); | |
252b5132 | 2669 | |
ebe50bae | 2670 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2671 | { |
2672 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2673 | if (info->executable) |
252b5132 | 2674 | { |
3d4d4302 | 2675 | s = bfd_get_linker_section (dynobj, ".interp"); |
ffb2e45b AM |
2676 | if (s == NULL) |
2677 | abort (); | |
eea6121a | 2678 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
252b5132 RH |
2679 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
2680 | } | |
161d71a6 | 2681 | } |
6725bdbf | 2682 | |
0c715baa AM |
2683 | /* Set up .got offsets for local syms, and space for local dynamic |
2684 | relocs. */ | |
2685 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
161d71a6 L |
2686 | { |
2687 | bfd_signed_vma *local_got; | |
2688 | bfd_signed_vma *end_local_got; | |
13ae64f3 | 2689 | char *local_tls_type; |
67a4f2b7 | 2690 | bfd_vma *local_tlsdesc_gotent; |
161d71a6 L |
2691 | bfd_size_type locsymcount; |
2692 | Elf_Internal_Shdr *symtab_hdr; | |
2693 | asection *srel; | |
6725bdbf | 2694 | |
0ffa91dd | 2695 | if (! is_i386_elf (ibfd)) |
161d71a6 | 2696 | continue; |
6725bdbf | 2697 | |
0c715baa AM |
2698 | for (s = ibfd->sections; s != NULL; s = s->next) |
2699 | { | |
e03a8ed8 | 2700 | struct elf_dyn_relocs *p; |
0c715baa | 2701 | |
daa67607 L |
2702 | if (!elf_i386_convert_mov_to_lea (ibfd, s, info)) |
2703 | return FALSE; | |
2704 | ||
e03a8ed8 | 2705 | for (p = ((struct elf_dyn_relocs *) |
e81d3500 | 2706 | elf_section_data (s)->local_dynrel); |
ec338859 AM |
2707 | p != NULL; |
2708 | p = p->next) | |
0c715baa | 2709 | { |
ec338859 AM |
2710 | if (!bfd_is_abs_section (p->sec) |
2711 | && bfd_is_abs_section (p->sec->output_section)) | |
2712 | { | |
2713 | /* Input section has been discarded, either because | |
2714 | it is a copy of a linkonce section or due to | |
2715 | linker script /DISCARD/, so we'll be discarding | |
2716 | the relocs too. */ | |
2717 | } | |
23209a78 | 2718 | else if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3348747a NS |
2719 | && strcmp (p->sec->output_section->name, |
2720 | ".tls_vars") == 0) | |
2721 | { | |
2722 | /* Relocations in vxworks .tls_vars sections are | |
2723 | handled specially by the loader. */ | |
2724 | } | |
248866a8 | 2725 | else if (p->count != 0) |
ec338859 AM |
2726 | { |
2727 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 2728 | srel->size += p->count * sizeof (Elf32_External_Rel); |
4b819e1f L |
2729 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2730 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2731 | { |
2732 | info->flags |= DF_TEXTREL; | |
2733 | if (info->warn_shared_textrel && info->shared) | |
2734 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2735 | p->sec->owner, p->sec); | |
b70321a2 | 2736 | } |
ec338859 | 2737 | } |
0c715baa AM |
2738 | } |
2739 | } | |
2740 | ||
2741 | local_got = elf_local_got_refcounts (ibfd); | |
161d71a6 L |
2742 | if (!local_got) |
2743 | continue; | |
6725bdbf | 2744 | |
0ffa91dd | 2745 | symtab_hdr = &elf_symtab_hdr (ibfd); |
161d71a6 L |
2746 | locsymcount = symtab_hdr->sh_info; |
2747 | end_local_got = local_got + locsymcount; | |
13ae64f3 | 2748 | local_tls_type = elf_i386_local_got_tls_type (ibfd); |
67a4f2b7 | 2749 | local_tlsdesc_gotent = elf_i386_local_tlsdesc_gotent (ibfd); |
6de2ae4a L |
2750 | s = htab->elf.sgot; |
2751 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2752 | for (; local_got < end_local_got; |
2753 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
161d71a6 | 2754 | { |
67a4f2b7 | 2755 | *local_tlsdesc_gotent = (bfd_vma) -1; |
161d71a6 | 2756 | if (*local_got > 0) |
6725bdbf | 2757 | { |
67a4f2b7 AO |
2758 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2759 | { | |
6de2ae4a | 2760 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
67a4f2b7 | 2761 | - elf_i386_compute_jump_table_size (htab); |
6de2ae4a | 2762 | htab->elf.sgotplt->size += 8; |
67a4f2b7 AO |
2763 | *local_got = (bfd_vma) -2; |
2764 | } | |
2765 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2766 | || GOT_TLS_GD_P (*local_tls_type)) | |
2767 | { | |
2768 | *local_got = s->size; | |
2769 | s->size += 4; | |
2770 | if (GOT_TLS_GD_P (*local_tls_type) | |
2771 | || *local_tls_type == GOT_TLS_IE_BOTH) | |
2772 | s->size += 4; | |
2773 | } | |
13ae64f3 | 2774 | if (info->shared |
67a4f2b7 | 2775 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
37e55690 JJ |
2776 | || (*local_tls_type & GOT_TLS_IE)) |
2777 | { | |
2778 | if (*local_tls_type == GOT_TLS_IE_BOTH) | |
eea6121a | 2779 | srel->size += 2 * sizeof (Elf32_External_Rel); |
67a4f2b7 AO |
2780 | else if (GOT_TLS_GD_P (*local_tls_type) |
2781 | || ! GOT_TLS_GDESC_P (*local_tls_type)) | |
eea6121a | 2782 | srel->size += sizeof (Elf32_External_Rel); |
67a4f2b7 | 2783 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
6de2ae4a | 2784 | htab->elf.srelplt->size += sizeof (Elf32_External_Rel); |
37e55690 | 2785 | } |
6725bdbf | 2786 | } |
161d71a6 L |
2787 | else |
2788 | *local_got = (bfd_vma) -1; | |
6725bdbf | 2789 | } |
252b5132 | 2790 | } |
6725bdbf | 2791 | |
13ae64f3 JJ |
2792 | if (htab->tls_ldm_got.refcount > 0) |
2793 | { | |
2794 | /* Allocate 2 got entries and 1 dynamic reloc for R_386_TLS_LDM | |
2795 | relocs. */ | |
6de2ae4a L |
2796 | htab->tls_ldm_got.offset = htab->elf.sgot->size; |
2797 | htab->elf.sgot->size += 8; | |
2798 | htab->elf.srelgot->size += sizeof (Elf32_External_Rel); | |
13ae64f3 JJ |
2799 | } |
2800 | else | |
2801 | htab->tls_ldm_got.offset = -1; | |
2802 | ||
0c715baa AM |
2803 | /* Allocate global sym .plt and .got entries, and space for global |
2804 | sym dynamic relocs. */ | |
eb4ff4d6 | 2805 | elf_link_hash_traverse (&htab->elf, elf_i386_allocate_dynrelocs, info); |
252b5132 | 2806 | |
c25bc9fc L |
2807 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2808 | htab_traverse (htab->loc_hash_table, | |
2809 | elf_i386_allocate_local_dynrelocs, | |
2810 | info); | |
2811 | ||
67a4f2b7 AO |
2812 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2813 | incremented. However, when we reserve space for TLS descriptors, | |
2814 | it's not incremented, so in order to compute the space reserved | |
2815 | for them, it suffices to multiply the reloc count by the jump | |
e1f98742 | 2816 | slot size. |
caa0075c | 2817 | |
e1f98742 L |
2818 | PR ld/13302: We start next_irelative_index at the end of .rela.plt |
2819 | so that R_386_IRELATIVE entries come last. */ | |
6de2ae4a | 2820 | if (htab->elf.srelplt) |
e1f98742 L |
2821 | { |
2822 | htab->next_tls_desc_index = htab->elf.srelplt->reloc_count; | |
2823 | htab->sgotplt_jump_table_size = htab->next_tls_desc_index * 4; | |
2824 | htab->next_irelative_index = htab->elf.srelplt->reloc_count - 1; | |
2825 | } | |
2826 | else if (htab->elf.irelplt) | |
2827 | htab->next_irelative_index = htab->elf.irelplt->reloc_count - 1; | |
2828 | ||
67a4f2b7 | 2829 | |
a7b16ceb L |
2830 | if (htab->elf.sgotplt) |
2831 | { | |
2832 | /* Don't allocate .got.plt section if there are no GOT nor PLT | |
9a2a56cc | 2833 | entries and there is no reference to _GLOBAL_OFFSET_TABLE_. */ |
9d4b2dba L |
2834 | if ((htab->elf.hgot == NULL |
2835 | || !htab->elf.hgot->ref_regular_nonweak) | |
e28df02b L |
2836 | && (htab->elf.sgotplt->size |
2837 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2838 | && (htab->elf.splt == NULL |
2839 | || htab->elf.splt->size == 0) | |
2840 | && (htab->elf.sgot == NULL | |
2841 | || htab->elf.sgot->size == 0) | |
2842 | && (htab->elf.iplt == NULL | |
2843 | || htab->elf.iplt->size == 0) | |
2844 | && (htab->elf.igotplt == NULL | |
2845 | || htab->elf.igotplt->size == 0)) | |
2846 | htab->elf.sgotplt->size = 0; | |
2847 | } | |
2848 | ||
9a2a56cc AM |
2849 | |
2850 | if (htab->plt_eh_frame != NULL | |
2851 | && htab->elf.splt != NULL | |
2852 | && htab->elf.splt->size != 0 | |
2853 | && !bfd_is_abs_section (htab->elf.splt->output_section) | |
2854 | && _bfd_elf_eh_frame_present (info)) | |
2855 | htab->plt_eh_frame->size = sizeof (elf_i386_eh_frame_plt); | |
2856 | ||
5a15f56f AM |
2857 | /* We now have determined the sizes of the various dynamic sections. |
2858 | Allocate memory for them. */ | |
b34976b6 | 2859 | relocs = FALSE; |
252b5132 RH |
2860 | for (s = dynobj->sections; s != NULL; s = s->next) |
2861 | { | |
eac338cf PB |
2862 | bfd_boolean strip_section = TRUE; |
2863 | ||
252b5132 RH |
2864 | if ((s->flags & SEC_LINKER_CREATED) == 0) |
2865 | continue; | |
2866 | ||
6de2ae4a | 2867 | if (s == htab->elf.splt |
9a2a56cc | 2868 | || s == htab->elf.sgot) |
252b5132 | 2869 | { |
6725bdbf AM |
2870 | /* Strip this section if we don't need it; see the |
2871 | comment below. */ | |
eac338cf PB |
2872 | /* We'd like to strip these sections if they aren't needed, but if |
2873 | we've exported dynamic symbols from them we must leave them. | |
2874 | It's too late to tell BFD to get rid of the symbols. */ | |
2875 | ||
7325306f | 2876 | if (htab->elf.hplt != NULL) |
eac338cf | 2877 | strip_section = FALSE; |
252b5132 | 2878 | } |
9a2a56cc AM |
2879 | else if (s == htab->elf.sgotplt |
2880 | || s == htab->elf.iplt | |
2881 | || s == htab->elf.igotplt | |
2882 | || s == htab->plt_eh_frame | |
2883 | || s == htab->sdynbss) | |
2884 | { | |
2885 | /* Strip these too. */ | |
2886 | } | |
0112cd26 | 2887 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rel")) |
252b5132 | 2888 | { |
6de2ae4a L |
2889 | if (s->size != 0 |
2890 | && s != htab->elf.srelplt | |
2891 | && s != htab->srelplt2) | |
b34976b6 | 2892 | relocs = TRUE; |
252b5132 | 2893 | |
0ac8d2ca AM |
2894 | /* We use the reloc_count field as a counter if we need |
2895 | to copy relocs into the output file. */ | |
5ae0bfb6 | 2896 | s->reloc_count = 0; |
252b5132 | 2897 | } |
6725bdbf | 2898 | else |
252b5132 RH |
2899 | { |
2900 | /* It's not one of our sections, so don't allocate space. */ | |
2901 | continue; | |
2902 | } | |
2903 | ||
c456f082 | 2904 | if (s->size == 0) |
252b5132 | 2905 | { |
0ac8d2ca AM |
2906 | /* If we don't need this section, strip it from the |
2907 | output file. This is mostly to handle .rel.bss and | |
2908 | .rel.plt. We must create both sections in | |
2909 | create_dynamic_sections, because they must be created | |
2910 | before the linker maps input sections to output | |
2911 | sections. The linker does that before | |
2912 | adjust_dynamic_symbol is called, and it is that | |
2913 | function which decides whether anything needs to go | |
2914 | into these sections. */ | |
c456f082 AM |
2915 | if (strip_section) |
2916 | s->flags |= SEC_EXCLUDE; | |
252b5132 RH |
2917 | continue; |
2918 | } | |
2919 | ||
c456f082 AM |
2920 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2921 | continue; | |
2922 | ||
f69da49f AM |
2923 | /* Allocate memory for the section contents. We use bfd_zalloc |
2924 | here in case unused entries are not reclaimed before the | |
2925 | section's contents are written out. This should not happen, | |
2926 | but this way if it does, we get a R_386_NONE reloc instead | |
2927 | of garbage. */ | |
a50b1753 | 2928 | s->contents = (unsigned char *) bfd_zalloc (dynobj, s->size); |
6725bdbf | 2929 | if (s->contents == NULL) |
b34976b6 | 2930 | return FALSE; |
252b5132 RH |
2931 | } |
2932 | ||
e41b3a13 | 2933 | if (htab->plt_eh_frame != NULL |
9a2a56cc AM |
2934 | && htab->plt_eh_frame->contents != NULL) |
2935 | { | |
2936 | memcpy (htab->plt_eh_frame->contents, elf_i386_eh_frame_plt, | |
2937 | sizeof (elf_i386_eh_frame_plt)); | |
2938 | bfd_put_32 (dynobj, htab->elf.splt->size, | |
2939 | htab->plt_eh_frame->contents + PLT_FDE_LEN_OFFSET); | |
2940 | } | |
e41b3a13 | 2941 | |
ebe50bae | 2942 | if (htab->elf.dynamic_sections_created) |
252b5132 RH |
2943 | { |
2944 | /* Add some entries to the .dynamic section. We fill in the | |
2945 | values later, in elf_i386_finish_dynamic_sections, but we | |
2946 | must add the entries now so that we get the correct size for | |
2947 | the .dynamic section. The DT_DEBUG entry is filled in by the | |
2948 | dynamic linker and used by the debugger. */ | |
dc810e39 | 2949 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2950 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2951 | |
36af4a4e | 2952 | if (info->executable) |
252b5132 | 2953 | { |
dc810e39 | 2954 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2955 | return FALSE; |
252b5132 RH |
2956 | } |
2957 | ||
6de2ae4a | 2958 | if (htab->elf.splt->size != 0) |
252b5132 | 2959 | { |
dc810e39 AM |
2960 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2961 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2962 | || !add_dynamic_entry (DT_PLTREL, DT_REL) | |
2963 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2964 | return FALSE; |
252b5132 RH |
2965 | } |
2966 | ||
2967 | if (relocs) | |
2968 | { | |
dc810e39 AM |
2969 | if (!add_dynamic_entry (DT_REL, 0) |
2970 | || !add_dynamic_entry (DT_RELSZ, 0) | |
2971 | || !add_dynamic_entry (DT_RELENT, sizeof (Elf32_External_Rel))) | |
b34976b6 | 2972 | return FALSE; |
252b5132 | 2973 | |
0c715baa AM |
2974 | /* If any dynamic relocs apply to a read-only section, |
2975 | then we need a DT_TEXTREL entry. */ | |
248866a8 | 2976 | if ((info->flags & DF_TEXTREL) == 0) |
eb4ff4d6 L |
2977 | elf_link_hash_traverse (&htab->elf, |
2978 | elf_i386_readonly_dynrelocs, info); | |
0c715baa AM |
2979 | |
2980 | if ((info->flags & DF_TEXTREL) != 0) | |
2981 | { | |
2982 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2983 | return FALSE; |
0c715baa | 2984 | } |
252b5132 | 2985 | } |
23209a78 | 2986 | if (get_elf_i386_backend_data (output_bfd)->is_vxworks |
7a2b07ff NS |
2987 | && !elf_vxworks_add_dynamic_entries (output_bfd, info)) |
2988 | return FALSE; | |
252b5132 | 2989 | } |
dc810e39 | 2990 | #undef add_dynamic_entry |
252b5132 | 2991 | |
b34976b6 | 2992 | return TRUE; |
252b5132 RH |
2993 | } |
2994 | ||
67a4f2b7 AO |
2995 | static bfd_boolean |
2996 | elf_i386_always_size_sections (bfd *output_bfd, | |
2997 | struct bfd_link_info *info) | |
2998 | { | |
2999 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
3000 | ||
3001 | if (tls_sec) | |
3002 | { | |
3003 | struct elf_link_hash_entry *tlsbase; | |
3004 | ||
3005 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
3006 | "_TLS_MODULE_BASE_", | |
3007 | FALSE, FALSE, FALSE); | |
3008 | ||
3009 | if (tlsbase && tlsbase->type == STT_TLS) | |
3010 | { | |
4dfe6ac6 | 3011 | struct elf_i386_link_hash_table *htab; |
67a4f2b7 AO |
3012 | struct bfd_link_hash_entry *bh = NULL; |
3013 | const struct elf_backend_data *bed | |
3014 | = get_elf_backend_data (output_bfd); | |
3015 | ||
4dfe6ac6 NC |
3016 | htab = elf_i386_hash_table (info); |
3017 | if (htab == NULL) | |
3018 | return FALSE; | |
3019 | ||
67a4f2b7 AO |
3020 | if (!(_bfd_generic_link_add_one_symbol |
3021 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
3022 | tls_sec, 0, NULL, FALSE, | |
3023 | bed->collect, &bh))) | |
3024 | return FALSE; | |
9f03412a | 3025 | |
4dfe6ac6 | 3026 | htab->tls_module_base = bh; |
9f03412a | 3027 | |
67a4f2b7 AO |
3028 | tlsbase = (struct elf_link_hash_entry *)bh; |
3029 | tlsbase->def_regular = 1; | |
3030 | tlsbase->other = STV_HIDDEN; | |
3031 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
3032 | } | |
3033 | } | |
3034 | ||
3035 | return TRUE; | |
3036 | } | |
3037 | ||
38701953 AM |
3038 | /* Set the correct type for an x86 ELF section. We do this by the |
3039 | section name, which is a hack, but ought to work. */ | |
3040 | ||
b34976b6 | 3041 | static bfd_boolean |
55fd94b0 AM |
3042 | elf_i386_fake_sections (bfd *abfd ATTRIBUTE_UNUSED, |
3043 | Elf_Internal_Shdr *hdr, | |
3044 | asection *sec) | |
38701953 | 3045 | { |
91d6fa6a | 3046 | const char *name; |
38701953 AM |
3047 | |
3048 | name = bfd_get_section_name (abfd, sec); | |
3049 | ||
3050 | /* This is an ugly, but unfortunately necessary hack that is | |
3051 | needed when producing EFI binaries on x86. It tells | |
3052 | elf.c:elf_fake_sections() not to consider ".reloc" as a section | |
3053 | containing ELF relocation info. We need this hack in order to | |
3054 | be able to generate ELF binaries that can be translated into | |
3055 | EFI applications (which are essentially COFF objects). Those | |
3056 | files contain a COFF ".reloc" section inside an ELFNN object, | |
3057 | which would normally cause BFD to segfault because it would | |
3058 | attempt to interpret this section as containing relocation | |
3059 | entries for section "oc". With this hack enabled, ".reloc" | |
3060 | will be treated as a normal data section, which will avoid the | |
3061 | segfault. However, you won't be able to create an ELFNN binary | |
3062 | with a section named "oc" that needs relocations, but that's | |
3063 | the kind of ugly side-effects you get when detecting section | |
3064 | types based on their names... In practice, this limitation is | |
3065 | unlikely to bite. */ | |
3066 | if (strcmp (name, ".reloc") == 0) | |
3067 | hdr->sh_type = SHT_PROGBITS; | |
3068 | ||
b34976b6 | 3069 | return TRUE; |
38701953 AM |
3070 | } |
3071 | ||
9f03412a AO |
3072 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
3073 | executables. Rather than setting it to the beginning of the TLS | |
3074 | section, we have to set it to the end. This function may be called | |
3075 | multiple times, it is idempotent. */ | |
3076 | ||
3077 | static void | |
eb4ff4d6 | 3078 | elf_i386_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 3079 | { |
4dfe6ac6 | 3080 | struct elf_i386_link_hash_table *htab; |
9f03412a AO |
3081 | struct bfd_link_hash_entry *base; |
3082 | ||
3083 | if (!info->executable) | |
3084 | return; | |
3085 | ||
4dfe6ac6 NC |
3086 | htab = elf_i386_hash_table (info); |
3087 | if (htab == NULL) | |
3088 | return; | |
9f03412a | 3089 | |
4dfe6ac6 NC |
3090 | base = htab->tls_module_base; |
3091 | if (base == NULL) | |
9f03412a AO |
3092 | return; |
3093 | ||
4dfe6ac6 | 3094 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
3095 | } |
3096 | ||
13ae64f3 JJ |
3097 | /* Return the base VMA address which should be subtracted from real addresses |
3098 | when resolving @dtpoff relocation. | |
3099 | This is PT_TLS segment p_vaddr. */ | |
3100 | ||
3101 | static bfd_vma | |
eb4ff4d6 | 3102 | elf_i386_dtpoff_base (struct bfd_link_info *info) |
13ae64f3 | 3103 | { |
e1918d23 AM |
3104 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3105 | if (elf_hash_table (info)->tls_sec == NULL) | |
6a30718d | 3106 | return 0; |
e1918d23 | 3107 | return elf_hash_table (info)->tls_sec->vma; |
13ae64f3 JJ |
3108 | } |
3109 | ||
3110 | /* Return the relocation value for @tpoff relocation | |
3111 | if STT_TLS virtual address is ADDRESS. */ | |
3112 | ||
3113 | static bfd_vma | |
eb4ff4d6 | 3114 | elf_i386_tpoff (struct bfd_link_info *info, bfd_vma address) |
13ae64f3 | 3115 | { |
e1918d23 | 3116 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
3117 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
3118 | bfd_vma static_tls_size; | |
13ae64f3 | 3119 | |
e1918d23 AM |
3120 | /* If tls_sec is NULL, we should have signalled an error already. */ |
3121 | if (htab->tls_sec == NULL) | |
6a30718d | 3122 | return 0; |
7dc98aea RO |
3123 | |
3124 | /* Consider special static TLS alignment requirements. */ | |
3125 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
3126 | return static_tls_size + htab->tls_sec->vma - address; | |
13ae64f3 JJ |
3127 | } |
3128 | ||
252b5132 RH |
3129 | /* Relocate an i386 ELF section. */ |
3130 | ||
b34976b6 | 3131 | static bfd_boolean |
55fd94b0 AM |
3132 | elf_i386_relocate_section (bfd *output_bfd, |
3133 | struct bfd_link_info *info, | |
3134 | bfd *input_bfd, | |
3135 | asection *input_section, | |
3136 | bfd_byte *contents, | |
3137 | Elf_Internal_Rela *relocs, | |
3138 | Elf_Internal_Sym *local_syms, | |
3139 | asection **local_sections) | |
252b5132 | 3140 | { |
6725bdbf | 3141 | struct elf_i386_link_hash_table *htab; |
252b5132 RH |
3142 | Elf_Internal_Shdr *symtab_hdr; |
3143 | struct elf_link_hash_entry **sym_hashes; | |
3144 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 3145 | bfd_vma *local_tlsdesc_gotents; |
252b5132 RH |
3146 | Elf_Internal_Rela *rel; |
3147 | Elf_Internal_Rela *relend; | |
3348747a | 3148 | bfd_boolean is_vxworks_tls; |
25e762b9 | 3149 | unsigned plt_entry_size; |
252b5132 | 3150 | |
0ffa91dd | 3151 | BFD_ASSERT (is_i386_elf (input_bfd)); |
6bbec505 | 3152 | |
6725bdbf | 3153 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
3154 | if (htab == NULL) |
3155 | return FALSE; | |
0ffa91dd | 3156 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
252b5132 RH |
3157 | sym_hashes = elf_sym_hashes (input_bfd); |
3158 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 3159 | local_tlsdesc_gotents = elf_i386_local_tlsdesc_gotent (input_bfd); |
3348747a NS |
3160 | /* We have to handle relocations in vxworks .tls_vars sections |
3161 | specially, because the dynamic loader is 'weird'. */ | |
23209a78 RM |
3162 | is_vxworks_tls = (get_elf_i386_backend_data (output_bfd)->is_vxworks |
3163 | && info->shared | |
3348747a NS |
3164 | && !strcmp (input_section->output_section->name, |
3165 | ".tls_vars")); | |
252b5132 | 3166 | |
eb4ff4d6 | 3167 | elf_i386_set_tls_module_base (info); |
9f03412a | 3168 | |
25e762b9 RM |
3169 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); |
3170 | ||
252b5132 RH |
3171 | rel = relocs; |
3172 | relend = relocs + input_section->reloc_count; | |
3173 | for (; rel < relend; rel++) | |
3174 | { | |
13ae64f3 | 3175 | unsigned int r_type; |
252b5132 RH |
3176 | reloc_howto_type *howto; |
3177 | unsigned long r_symndx; | |
3178 | struct elf_link_hash_entry *h; | |
3179 | Elf_Internal_Sym *sym; | |
3180 | asection *sec; | |
67a4f2b7 | 3181 | bfd_vma off, offplt; |
252b5132 | 3182 | bfd_vma relocation; |
b34976b6 | 3183 | bfd_boolean unresolved_reloc; |
252b5132 | 3184 | bfd_reloc_status_type r; |
1b452ec6 | 3185 | unsigned int indx; |
13ae64f3 | 3186 | int tls_type; |
252b5132 RH |
3187 | |
3188 | r_type = ELF32_R_TYPE (rel->r_info); | |
55fd94b0 AM |
3189 | if (r_type == R_386_GNU_VTINHERIT |
3190 | || r_type == R_386_GNU_VTENTRY) | |
252b5132 | 3191 | continue; |
dc47f327 | 3192 | |
55fd94b0 | 3193 | if ((indx = r_type) >= R_386_standard |
13ae64f3 JJ |
3194 | && ((indx = r_type - R_386_ext_offset) - R_386_standard |
3195 | >= R_386_ext - R_386_standard) | |
3196 | && ((indx = r_type - R_386_tls_offset) - R_386_ext | |
cbe950e9 | 3197 | >= R_386_irelative - R_386_ext)) |
252b5132 | 3198 | { |
6ba842b6 | 3199 | (*_bfd_error_handler) |
d003868e AM |
3200 | (_("%B: unrecognized relocation (0x%x) in section `%A'"), |
3201 | input_bfd, input_section, r_type); | |
252b5132 | 3202 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 3203 | return FALSE; |
252b5132 | 3204 | } |
1b452ec6 | 3205 | howto = elf_howto_table + indx; |
252b5132 RH |
3206 | |
3207 | r_symndx = ELF32_R_SYM (rel->r_info); | |
252b5132 RH |
3208 | h = NULL; |
3209 | sym = NULL; | |
3210 | sec = NULL; | |
b34976b6 | 3211 | unresolved_reloc = FALSE; |
252b5132 RH |
3212 | if (r_symndx < symtab_hdr->sh_info) |
3213 | { | |
3214 | sym = local_syms + r_symndx; | |
3215 | sec = local_sections[r_symndx]; | |
3216 | relocation = (sec->output_section->vma | |
3217 | + sec->output_offset | |
3218 | + sym->st_value); | |
ab96bf03 AM |
3219 | |
3220 | if (ELF_ST_TYPE (sym->st_info) == STT_SECTION | |
3221 | && ((sec->flags & SEC_MERGE) != 0 | |
3222 | || (info->relocatable | |
3223 | && sec->output_offset != 0))) | |
f8df10f4 | 3224 | { |
f8df10f4 | 3225 | bfd_vma addend; |
4a335f3d | 3226 | bfd_byte *where = contents + rel->r_offset; |
f8df10f4 | 3227 | |
4a335f3d | 3228 | switch (howto->size) |
f8df10f4 | 3229 | { |
4a335f3d AM |
3230 | case 0: |
3231 | addend = bfd_get_8 (input_bfd, where); | |
3232 | if (howto->pc_relative) | |
3233 | { | |
3234 | addend = (addend ^ 0x80) - 0x80; | |
3235 | addend += 1; | |
3236 | } | |
3237 | break; | |
3238 | case 1: | |
3239 | addend = bfd_get_16 (input_bfd, where); | |
3240 | if (howto->pc_relative) | |
3241 | { | |
3242 | addend = (addend ^ 0x8000) - 0x8000; | |
3243 | addend += 2; | |
3244 | } | |
3245 | break; | |
3246 | case 2: | |
3247 | addend = bfd_get_32 (input_bfd, where); | |
3248 | if (howto->pc_relative) | |
3249 | { | |
3250 | addend = (addend ^ 0x80000000) - 0x80000000; | |
3251 | addend += 4; | |
3252 | } | |
3253 | break; | |
3254 | default: | |
3255 | abort (); | |
f8df10f4 JJ |
3256 | } |
3257 | ||
ab96bf03 AM |
3258 | if (info->relocatable) |
3259 | addend += sec->output_offset; | |
3260 | else | |
3261 | { | |
3262 | asection *msec = sec; | |
3263 | addend = _bfd_elf_rel_local_sym (output_bfd, sym, &msec, | |
3264 | addend); | |
3265 | addend -= relocation; | |
3266 | addend += msec->output_section->vma + msec->output_offset; | |
3267 | } | |
4a335f3d AM |
3268 | |
3269 | switch (howto->size) | |
3270 | { | |
3271 | case 0: | |
16a10388 | 3272 | /* FIXME: overflow checks. */ |
4a335f3d AM |
3273 | if (howto->pc_relative) |
3274 | addend -= 1; | |
3275 | bfd_put_8 (input_bfd, addend, where); | |
4a335f3d AM |
3276 | break; |
3277 | case 1: | |
3278 | if (howto->pc_relative) | |
3279 | addend -= 2; | |
3280 | bfd_put_16 (input_bfd, addend, where); | |
4a335f3d AM |
3281 | break; |
3282 | case 2: | |
3283 | if (howto->pc_relative) | |
3284 | addend -= 4; | |
3285 | bfd_put_32 (input_bfd, addend, where); | |
3286 | break; | |
3287 | } | |
f8df10f4 | 3288 | } |
1f85278f L |
3289 | else if (!info->relocatable |
3290 | && ELF32_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) | |
c25bc9fc L |
3291 | { |
3292 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
9fff0c39 L |
3293 | h = elf_i386_get_local_sym_hash (htab, input_bfd, rel, |
3294 | FALSE); | |
c25bc9fc L |
3295 | if (h == NULL) |
3296 | abort (); | |
3297 | ||
23209a78 | 3298 | /* Set STT_GNU_IFUNC symbol value. */ |
c25bc9fc L |
3299 | h->root.u.def.value = sym->st_value; |
3300 | h->root.u.def.section = sec; | |
3301 | } | |
252b5132 RH |
3302 | } |
3303 | else | |
3304 | { | |
3d540e93 | 3305 | bfd_boolean warned ATTRIBUTE_UNUSED; |
ffb2e45b | 3306 | |
b2a8e766 AM |
3307 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
3308 | r_symndx, symtab_hdr, sym_hashes, | |
3309 | h, sec, relocation, | |
3310 | unresolved_reloc, warned); | |
252b5132 RH |
3311 | } |
3312 | ||
dbaa2011 | 3313 | if (sec != NULL && discarded_section (sec)) |
0672748a | 3314 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
545fd46b | 3315 | rel, 1, relend, howto, 0, contents); |
9635fe29 | 3316 | |
ab96bf03 AM |
3317 | if (info->relocatable) |
3318 | continue; | |
3319 | ||
cbe950e9 L |
3320 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
3321 | it here if it is defined in a non-shared object. */ | |
3322 | if (h != NULL | |
3323 | && h->type == STT_GNU_IFUNC | |
3324 | && h->def_regular) | |
3325 | { | |
3326 | asection *plt, *gotplt, *base_got; | |
3327 | bfd_vma plt_index; | |
4c544807 | 3328 | const char *name; |
cbe950e9 L |
3329 | |
3330 | if ((input_section->flags & SEC_ALLOC) == 0 | |
3331 | || h->plt.offset == (bfd_vma) -1) | |
3332 | abort (); | |
3333 | ||
3334 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 3335 | if (htab->elf.splt != NULL) |
cbe950e9 | 3336 | { |
6de2ae4a L |
3337 | plt = htab->elf.splt; |
3338 | gotplt = htab->elf.sgotplt; | |
cbe950e9 L |
3339 | } |
3340 | else | |
3341 | { | |
6de2ae4a L |
3342 | plt = htab->elf.iplt; |
3343 | gotplt = htab->elf.igotplt; | |
cbe950e9 L |
3344 | } |
3345 | ||
3346 | relocation = (plt->output_section->vma | |
3347 | + plt->output_offset + h->plt.offset); | |
3348 | ||
3349 | switch (r_type) | |
3350 | { | |
3351 | default: | |
4c544807 L |
3352 | if (h->root.root.string) |
3353 | name = h->root.root.string; | |
3354 | else | |
3355 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
3356 | NULL); | |
cbe950e9 L |
3357 | (*_bfd_error_handler) |
3358 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
3359 | "symbol `%s' isn't handled by %s"), input_bfd, | |
3360 | elf_howto_table[r_type].name, | |
4c544807 | 3361 | name, __FUNCTION__); |
cbe950e9 L |
3362 | bfd_set_error (bfd_error_bad_value); |
3363 | return FALSE; | |
3364 | ||
3365 | case R_386_32: | |
710ab287 | 3366 | /* Generate dynamic relcoation only when there is a |
c293fa49 | 3367 | non-GOT reference in a shared object. */ |
710ab287 L |
3368 | if (info->shared && h->non_got_ref) |
3369 | { | |
3370 | Elf_Internal_Rela outrel; | |
710ab287 L |
3371 | asection *sreloc; |
3372 | bfd_vma offset; | |
3373 | ||
c25bc9fc L |
3374 | /* Need a dynamic relocation to get the real function |
3375 | adddress. */ | |
710ab287 L |
3376 | offset = _bfd_elf_section_offset (output_bfd, |
3377 | info, | |
3378 | input_section, | |
3379 | rel->r_offset); | |
3380 | if (offset == (bfd_vma) -1 | |
3381 | || offset == (bfd_vma) -2) | |
3382 | abort (); | |
3383 | ||
3384 | outrel.r_offset = (input_section->output_section->vma | |
3385 | + input_section->output_offset | |
3386 | + offset); | |
3387 | ||
3388 | if (h->dynindx == -1 | |
44c4ea11 L |
3389 | || h->forced_local |
3390 | || info->executable) | |
710ab287 L |
3391 | { |
3392 | /* This symbol is resolved locally. */ | |
56b8aada L |
3393 | outrel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); |
3394 | bfd_put_32 (output_bfd, | |
3395 | (h->root.u.def.value | |
3396 | + h->root.u.def.section->output_section->vma | |
3397 | + h->root.u.def.section->output_offset), | |
3398 | contents + offset); | |
710ab287 L |
3399 | } |
3400 | else | |
56b8aada | 3401 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
710ab287 | 3402 | |
6de2ae4a | 3403 | sreloc = htab->elf.irelifunc; |
59d6ffb2 | 3404 | elf_append_rel (output_bfd, sreloc, &outrel); |
710ab287 L |
3405 | |
3406 | /* If this reloc is against an external symbol, we | |
3407 | do not want to fiddle with the addend. Otherwise, | |
3408 | we need to include the symbol value so that it | |
3409 | becomes an addend for the dynamic reloc. For an | |
3410 | internal symbol, we have updated addend. */ | |
56b8aada | 3411 | continue; |
710ab287 | 3412 | } |
d59a60e9 | 3413 | /* FALLTHROUGH */ |
cbe950e9 L |
3414 | case R_386_PC32: |
3415 | case R_386_PLT32: | |
3416 | goto do_relocation; | |
3417 | ||
3418 | case R_386_GOT32: | |
6de2ae4a | 3419 | base_got = htab->elf.sgot; |
cbe950e9 L |
3420 | off = h->got.offset; |
3421 | ||
7afd84dc | 3422 | if (base_got == NULL) |
cbe950e9 L |
3423 | abort (); |
3424 | ||
7afd84dc | 3425 | if (off == (bfd_vma) -1) |
cbe950e9 | 3426 | { |
7afd84dc L |
3427 | /* We can't use h->got.offset here to save state, or |
3428 | even just remember the offset, as finish_dynamic_symbol | |
3429 | would use that as offset into .got. */ | |
6bbec505 | 3430 | |
6de2ae4a | 3431 | if (htab->elf.splt != NULL) |
7afd84dc | 3432 | { |
25e762b9 | 3433 | plt_index = h->plt.offset / plt_entry_size - 1; |
7afd84dc | 3434 | off = (plt_index + 3) * 4; |
6de2ae4a | 3435 | base_got = htab->elf.sgotplt; |
7afd84dc | 3436 | } |
cbe950e9 L |
3437 | else |
3438 | { | |
25e762b9 | 3439 | plt_index = h->plt.offset / plt_entry_size; |
7afd84dc | 3440 | off = plt_index * 4; |
6de2ae4a | 3441 | base_got = htab->elf.igotplt; |
7afd84dc L |
3442 | } |
3443 | ||
3444 | if (h->dynindx == -1 | |
3445 | || h->forced_local | |
3446 | || info->symbolic) | |
3447 | { | |
3448 | /* This references the local defitionion. We must | |
3449 | initialize this entry in the global offset table. | |
3450 | Since the offset must always be a multiple of 8, | |
3451 | we use the least significant bit to record | |
3452 | whether we have initialized it already. | |
3453 | ||
3454 | When doing a dynamic link, we create a .rela.got | |
3455 | relocation entry to initialize the value. This | |
3456 | is done in the finish_dynamic_symbol routine. */ | |
3457 | if ((off & 1) != 0) | |
3458 | off &= ~1; | |
3459 | else | |
3460 | { | |
3461 | bfd_put_32 (output_bfd, relocation, | |
3462 | base_got->contents + off); | |
3463 | h->got.offset |= 1; | |
3464 | } | |
cbe950e9 | 3465 | } |
cbe950e9 | 3466 | |
7afd84dc | 3467 | relocation = off; |
cbe950e9 | 3468 | |
7afd84dc | 3469 | /* Adjust for static executables. */ |
6de2ae4a | 3470 | if (htab->elf.splt == NULL) |
7afd84dc L |
3471 | relocation += gotplt->output_offset; |
3472 | } | |
3473 | else | |
0018b0a3 L |
3474 | { |
3475 | relocation = (base_got->output_section->vma | |
3476 | + base_got->output_offset + off | |
3477 | - gotplt->output_section->vma | |
3478 | - gotplt->output_offset); | |
3479 | /* Adjust for static executables. */ | |
6de2ae4a | 3480 | if (htab->elf.splt == NULL) |
0018b0a3 L |
3481 | relocation += gotplt->output_offset; |
3482 | } | |
3483 | ||
cbe950e9 L |
3484 | goto do_relocation; |
3485 | ||
3486 | case R_386_GOTOFF: | |
3487 | relocation -= (gotplt->output_section->vma | |
3488 | + gotplt->output_offset); | |
3489 | goto do_relocation; | |
3490 | } | |
3491 | } | |
3492 | ||
252b5132 RH |
3493 | switch (r_type) |
3494 | { | |
3495 | case R_386_GOT32: | |
3496 | /* Relocation is to the entry for this symbol in the global | |
3497 | offset table. */ | |
6de2ae4a | 3498 | if (htab->elf.sgot == NULL) |
ffb2e45b | 3499 | abort (); |
252b5132 RH |
3500 | |
3501 | if (h != NULL) | |
3502 | { | |
b34976b6 | 3503 | bfd_boolean dyn; |
252b5132 RH |
3504 | |
3505 | off = h->got.offset; | |
ebe50bae | 3506 | dyn = htab->elf.dynamic_sections_created; |
26e41594 | 3507 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
252b5132 | 3508 | || (info->shared |
586119b3 | 3509 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
ef5aade5 L |
3510 | || (ELF_ST_VISIBILITY (h->other) |
3511 | && h->root.type == bfd_link_hash_undefweak)) | |
252b5132 RH |
3512 | { |
3513 | /* This is actually a static link, or it is a | |
3514 | -Bsymbolic link and the symbol is defined | |
3515 | locally, or the symbol was forced to be local | |
3516 | because of a version file. We must initialize | |
3517 | this entry in the global offset table. Since the | |
3518 | offset must always be a multiple of 4, we use the | |
3519 | least significant bit to record whether we have | |
3520 | initialized it already. | |
3521 | ||
3522 | When doing a dynamic link, we create a .rel.got | |
3523 | relocation entry to initialize the value. This | |
3524 | is done in the finish_dynamic_symbol routine. */ | |
3525 | if ((off & 1) != 0) | |
3526 | off &= ~1; | |
3527 | else | |
3528 | { | |
3529 | bfd_put_32 (output_bfd, relocation, | |
6de2ae4a | 3530 | htab->elf.sgot->contents + off); |
252b5132 RH |
3531 | h->got.offset |= 1; |
3532 | } | |
3533 | } | |
8c694914 | 3534 | else |
b34976b6 | 3535 | unresolved_reloc = FALSE; |
252b5132 RH |
3536 | } |
3537 | else | |
3538 | { | |
ffb2e45b AM |
3539 | if (local_got_offsets == NULL) |
3540 | abort (); | |
252b5132 RH |
3541 | |
3542 | off = local_got_offsets[r_symndx]; | |
3543 | ||
3544 | /* The offset must always be a multiple of 4. We use | |
83be169b AM |
3545 | the least significant bit to record whether we have |
3546 | already generated the necessary reloc. */ | |
252b5132 RH |
3547 | if ((off & 1) != 0) |
3548 | off &= ~1; | |
3549 | else | |
3550 | { | |
6725bdbf | 3551 | bfd_put_32 (output_bfd, relocation, |
6de2ae4a | 3552 | htab->elf.sgot->contents + off); |
252b5132 RH |
3553 | |
3554 | if (info->shared) | |
3555 | { | |
947216bf AM |
3556 | asection *s; |
3557 | Elf_Internal_Rela outrel; | |
252b5132 | 3558 | |
6de2ae4a | 3559 | s = htab->elf.srelgot; |
947216bf | 3560 | if (s == NULL) |
ffb2e45b | 3561 | abort (); |
252b5132 | 3562 | |
6de2ae4a L |
3563 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3564 | + htab->elf.sgot->output_offset | |
252b5132 RH |
3565 | + off); |
3566 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
59d6ffb2 | 3567 | elf_append_rel (output_bfd, s, &outrel); |
252b5132 RH |
3568 | } |
3569 | ||
3570 | local_got_offsets[r_symndx] |= 1; | |
3571 | } | |
252b5132 RH |
3572 | } |
3573 | ||
ffb2e45b AM |
3574 | if (off >= (bfd_vma) -2) |
3575 | abort (); | |
3576 | ||
6de2ae4a L |
3577 | relocation = htab->elf.sgot->output_section->vma |
3578 | + htab->elf.sgot->output_offset + off | |
3579 | - htab->elf.sgotplt->output_section->vma | |
3580 | - htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3581 | break; |
3582 | ||
3583 | case R_386_GOTOFF: | |
3584 | /* Relocation is relative to the start of the global offset | |
3585 | table. */ | |
3586 | ||
90f487df L |
3587 | /* Check to make sure it isn't a protected function symbol |
3588 | for shared library since it may not be local when used | |
41bed6dd L |
3589 | as function address. We also need to make sure that a |
3590 | symbol is defined locally. */ | |
3591 | if (info->shared && h) | |
90f487df | 3592 | { |
41bed6dd L |
3593 | if (!h->def_regular) |
3594 | { | |
3595 | const char *v; | |
3596 | ||
3597 | switch (ELF_ST_VISIBILITY (h->other)) | |
3598 | { | |
3599 | case STV_HIDDEN: | |
3600 | v = _("hidden symbol"); | |
3601 | break; | |
3602 | case STV_INTERNAL: | |
3603 | v = _("internal symbol"); | |
3604 | break; | |
3605 | case STV_PROTECTED: | |
3606 | v = _("protected symbol"); | |
3607 | break; | |
3608 | default: | |
3609 | v = _("symbol"); | |
3610 | break; | |
3611 | } | |
3612 | ||
3613 | (*_bfd_error_handler) | |
3614 | (_("%B: relocation R_386_GOTOFF against undefined %s `%s' can not be used when making a shared object"), | |
3615 | input_bfd, v, h->root.root.string); | |
3616 | bfd_set_error (bfd_error_bad_value); | |
3617 | return FALSE; | |
3618 | } | |
3619 | else if (!info->executable | |
bdb892b9 | 3620 | && !SYMBOLIC_BIND (info, h) |
41bed6dd L |
3621 | && h->type == STT_FUNC |
3622 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3623 | { | |
3624 | (*_bfd_error_handler) | |
3625 | (_("%B: relocation R_386_GOTOFF against protected function `%s' can not be used when making a shared object"), | |
3626 | input_bfd, h->root.root.string); | |
3627 | bfd_set_error (bfd_error_bad_value); | |
3628 | return FALSE; | |
3629 | } | |
90f487df L |
3630 | } |
3631 | ||
8c37241b JJ |
3632 | /* Note that sgot is not involved in this |
3633 | calculation. We always want the start of .got.plt. If we | |
3634 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
252b5132 RH |
3635 | permitted by the ABI, we might have to change this |
3636 | calculation. */ | |
6de2ae4a L |
3637 | relocation -= htab->elf.sgotplt->output_section->vma |
3638 | + htab->elf.sgotplt->output_offset; | |
252b5132 RH |
3639 | break; |
3640 | ||
3641 | case R_386_GOTPC: | |
3642 | /* Use global offset table as symbol value. */ | |
6de2ae4a L |
3643 | relocation = htab->elf.sgotplt->output_section->vma |
3644 | + htab->elf.sgotplt->output_offset; | |
b34976b6 | 3645 | unresolved_reloc = FALSE; |
252b5132 RH |
3646 | break; |
3647 | ||
3648 | case R_386_PLT32: | |
3649 | /* Relocation is to the entry for this symbol in the | |
3650 | procedure linkage table. */ | |
3651 | ||
dd5724d5 | 3652 | /* Resolve a PLT32 reloc against a local symbol directly, |
83be169b | 3653 | without using the procedure linkage table. */ |
252b5132 RH |
3654 | if (h == NULL) |
3655 | break; | |
3656 | ||
dd5724d5 | 3657 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3658 | || htab->elf.splt == NULL) |
252b5132 RH |
3659 | { |
3660 | /* We didn't make a PLT entry for this symbol. This | |
83be169b AM |
3661 | happens when statically linking PIC code, or when |
3662 | using -Bsymbolic. */ | |
252b5132 RH |
3663 | break; |
3664 | } | |
3665 | ||
6de2ae4a L |
3666 | relocation = (htab->elf.splt->output_section->vma |
3667 | + htab->elf.splt->output_offset | |
252b5132 | 3668 | + h->plt.offset); |
b34976b6 | 3669 | unresolved_reloc = FALSE; |
252b5132 RH |
3670 | break; |
3671 | ||
3672 | case R_386_32: | |
3673 | case R_386_PC32: | |
3348747a NS |
3674 | if ((input_section->flags & SEC_ALLOC) == 0 |
3675 | || is_vxworks_tls) | |
ec338859 AM |
3676 | break; |
3677 | ||
12d0ee4a | 3678 | if ((info->shared |
ef5aade5 L |
3679 | && (h == NULL |
3680 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3681 | || h->root.type != bfd_link_hash_undefweak) | |
12d0ee4a | 3682 | && (r_type != R_386_PC32 |
f6c52c13 | 3683 | || !SYMBOL_CALLS_LOCAL (info, h))) |
a23b6845 AM |
3684 | || (ELIMINATE_COPY_RELOCS |
3685 | && !info->shared | |
12d0ee4a AM |
3686 | && h != NULL |
3687 | && h->dynindx != -1 | |
f5385ebf AM |
3688 | && !h->non_got_ref |
3689 | && ((h->def_dynamic | |
3690 | && !h->def_regular) | |
28d0b90e | 3691 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3692 | || h->root.type == bfd_link_hash_undefined))) |
252b5132 | 3693 | { |
947216bf | 3694 | Elf_Internal_Rela outrel; |
b34976b6 | 3695 | bfd_boolean skip, relocate; |
0c715baa | 3696 | asection *sreloc; |
252b5132 RH |
3697 | |
3698 | /* When generating a shared object, these relocations | |
3699 | are copied into the output file to be resolved at run | |
3700 | time. */ | |
3701 | ||
b34976b6 AM |
3702 | skip = FALSE; |
3703 | relocate = FALSE; | |
252b5132 | 3704 | |
c629eae0 JJ |
3705 | outrel.r_offset = |
3706 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
3707 | rel->r_offset); | |
3708 | if (outrel.r_offset == (bfd_vma) -1) | |
b34976b6 | 3709 | skip = TRUE; |
0bb2d96a | 3710 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3711 | skip = TRUE, relocate = TRUE; |
252b5132 RH |
3712 | outrel.r_offset += (input_section->output_section->vma |
3713 | + input_section->output_offset); | |
3714 | ||
3715 | if (skip) | |
0bb2d96a | 3716 | memset (&outrel, 0, sizeof outrel); |
5a15f56f AM |
3717 | else if (h != NULL |
3718 | && h->dynindx != -1 | |
3719 | && (r_type == R_386_PC32 | |
3720 | || !info->shared | |
55255dae | 3721 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 3722 | || !h->def_regular)) |
0bb2d96a | 3723 | outrel.r_info = ELF32_R_INFO (h->dynindx, r_type); |
252b5132 RH |
3724 | else |
3725 | { | |
5a15f56f | 3726 | /* This symbol is local, or marked to become local. */ |
b34976b6 | 3727 | relocate = TRUE; |
5a15f56f | 3728 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
252b5132 RH |
3729 | } |
3730 | ||
cbe950e9 | 3731 | sreloc = elf_section_data (input_section)->sreloc; |
e7c33416 | 3732 | |
62d78908 L |
3733 | if (sreloc == NULL || sreloc->contents == NULL) |
3734 | { | |
3735 | r = bfd_reloc_notsupported; | |
3736 | goto check_relocation_error; | |
3737 | } | |
0c715baa | 3738 | |
59d6ffb2 | 3739 | elf_append_rel (output_bfd, sreloc, &outrel); |
252b5132 RH |
3740 | |
3741 | /* If this reloc is against an external symbol, we do | |
3742 | not want to fiddle with the addend. Otherwise, we | |
3743 | need to include the symbol value so that it becomes | |
3744 | an addend for the dynamic reloc. */ | |
0f88be7a | 3745 | if (! relocate) |
252b5132 RH |
3746 | continue; |
3747 | } | |
252b5132 RH |
3748 | break; |
3749 | ||
37e55690 | 3750 | case R_386_TLS_IE: |
1d85728f | 3751 | if (!info->executable) |
37e55690 | 3752 | { |
947216bf | 3753 | Elf_Internal_Rela outrel; |
37e55690 | 3754 | asection *sreloc; |
37e55690 JJ |
3755 | |
3756 | outrel.r_offset = rel->r_offset | |
3757 | + input_section->output_section->vma | |
3758 | + input_section->output_offset; | |
3759 | outrel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); | |
3760 | sreloc = elf_section_data (input_section)->sreloc; | |
3761 | if (sreloc == NULL) | |
3762 | abort (); | |
59d6ffb2 | 3763 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
3764 | } |
3765 | /* Fall through */ | |
3766 | ||
13ae64f3 | 3767 | case R_386_TLS_GD: |
67a4f2b7 AO |
3768 | case R_386_TLS_GOTDESC: |
3769 | case R_386_TLS_DESC_CALL: | |
13ae64f3 | 3770 | case R_386_TLS_IE_32: |
37e55690 | 3771 | case R_386_TLS_GOTIE: |
13ae64f3 JJ |
3772 | tls_type = GOT_UNKNOWN; |
3773 | if (h == NULL && local_got_offsets) | |
3774 | tls_type = elf_i386_local_got_tls_type (input_bfd) [r_symndx]; | |
3775 | else if (h != NULL) | |
142411ca | 3776 | tls_type = elf_i386_hash_entry(h)->tls_type; |
37e55690 JJ |
3777 | if (tls_type == GOT_TLS_IE) |
3778 | tls_type = GOT_TLS_IE_NEG; | |
142411ca L |
3779 | |
3780 | if (! elf_i386_tls_transition (info, input_bfd, | |
3781 | input_section, contents, | |
3782 | symtab_hdr, sym_hashes, | |
3783 | &r_type, tls_type, rel, | |
4c544807 | 3784 | relend, h, r_symndx)) |
142411ca | 3785 | return FALSE; |
13ae64f3 JJ |
3786 | |
3787 | if (r_type == R_386_TLS_LE_32) | |
3788 | { | |
82e51918 | 3789 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 JJ |
3790 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
3791 | { | |
142411ca | 3792 | unsigned int type; |
13ae64f3 JJ |
3793 | bfd_vma roff; |
3794 | ||
3795 | /* GD->LE transition. */ | |
13ae64f3 | 3796 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
3797 | if (type == 0x04) |
3798 | { | |
3799 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
3800 | Change it into: | |
3801 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3802 | (6 byte form of subl). */ | |
13ae64f3 JJ |
3803 | memcpy (contents + rel->r_offset - 3, |
3804 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
142411ca | 3805 | roff = rel->r_offset + 5; |
13ae64f3 JJ |
3806 | } |
3807 | else | |
3808 | { | |
142411ca L |
3809 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop |
3810 | Change it into: | |
3811 | movl %gs:0, %eax; subl $foo@tpoff, %eax | |
3812 | (6 byte form of subl). */ | |
3813 | memcpy (contents + rel->r_offset - 2, | |
3814 | "\x65\xa1\0\0\0\0\x81\xe8\0\0\0", 12); | |
3815 | roff = rel->r_offset + 6; | |
13ae64f3 | 3816 | } |
eb4ff4d6 | 3817 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
13ae64f3 | 3818 | contents + roff); |
a3fadc9a | 3819 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
3820 | rel++; |
3821 | continue; | |
3822 | } | |
67a4f2b7 AO |
3823 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
3824 | { | |
3825 | /* GDesc -> LE transition. | |
3826 | It's originally something like: | |
3827 | leal x@tlsdesc(%ebx), %eax | |
3828 | ||
3829 | leal x@ntpoff, %eax | |
3830 | ||
3831 | Registers other than %eax may be set up here. */ | |
3832 | ||
142411ca | 3833 | unsigned int val; |
67a4f2b7 AO |
3834 | bfd_vma roff; |
3835 | ||
67a4f2b7 | 3836 | roff = rel->r_offset; |
67a4f2b7 | 3837 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3838 | |
3839 | /* Now modify the instruction as appropriate. */ | |
3840 | /* aoliva FIXME: remove the above and xor the byte | |
3841 | below with 0x86. */ | |
3842 | bfd_put_8 (output_bfd, val ^ 0x86, | |
3843 | contents + roff - 1); | |
eb4ff4d6 | 3844 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
67a4f2b7 AO |
3845 | contents + roff); |
3846 | continue; | |
3847 | } | |
3848 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
3849 | { | |
3850 | /* GDesc -> LE transition. | |
3851 | It's originally: | |
3852 | call *(%eax) | |
3853 | Turn it into: | |
142411ca | 3854 | xchg %ax,%ax */ |
67a4f2b7 | 3855 | |
67a4f2b7 | 3856 | bfd_vma roff; |
6bbec505 | 3857 | |
67a4f2b7 | 3858 | roff = rel->r_offset; |
10efb593 | 3859 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3860 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3861 | continue; | |
3862 | } | |
37e55690 | 3863 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_IE) |
13ae64f3 | 3864 | { |
142411ca | 3865 | unsigned int val; |
13ae64f3 JJ |
3866 | |
3867 | /* IE->LE transition: | |
37e55690 JJ |
3868 | Originally it can be one of: |
3869 | movl foo, %eax | |
3870 | movl foo, %reg | |
3871 | addl foo, %reg | |
3872 | We change it into: | |
3873 | movl $foo, %eax | |
3874 | movl $foo, %reg | |
3875 | addl $foo, %reg. */ | |
37e55690 | 3876 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
37e55690 JJ |
3877 | if (val == 0xa1) |
3878 | { | |
3879 | /* movl foo, %eax. */ | |
55fd94b0 AM |
3880 | bfd_put_8 (output_bfd, 0xb8, |
3881 | contents + rel->r_offset - 1); | |
37e55690 | 3882 | } |
299bf759 | 3883 | else |
37e55690 | 3884 | { |
142411ca L |
3885 | unsigned int type; |
3886 | ||
55fd94b0 AM |
3887 | type = bfd_get_8 (input_bfd, |
3888 | contents + rel->r_offset - 2); | |
299bf759 | 3889 | switch (type) |
26e41594 | 3890 | { |
299bf759 L |
3891 | case 0x8b: |
3892 | /* movl */ | |
299bf759 L |
3893 | bfd_put_8 (output_bfd, 0xc7, |
3894 | contents + rel->r_offset - 2); | |
3895 | bfd_put_8 (output_bfd, | |
3896 | 0xc0 | ((val >> 3) & 7), | |
3897 | contents + rel->r_offset - 1); | |
3898 | break; | |
3899 | case 0x03: | |
3900 | /* addl */ | |
299bf759 L |
3901 | bfd_put_8 (output_bfd, 0x81, |
3902 | contents + rel->r_offset - 2); | |
3903 | bfd_put_8 (output_bfd, | |
3904 | 0xc0 | ((val >> 3) & 7), | |
3905 | contents + rel->r_offset - 1); | |
3906 | break; | |
3907 | default: | |
3908 | BFD_FAIL (); | |
3909 | break; | |
26e41594 | 3910 | } |
37e55690 | 3911 | } |
eb4ff4d6 | 3912 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3913 | contents + rel->r_offset); |
3914 | continue; | |
3915 | } | |
3916 | else | |
3917 | { | |
3918 | unsigned int val, type; | |
3919 | ||
3920 | /* {IE_32,GOTIE}->LE transition: | |
3921 | Originally it can be one of: | |
13ae64f3 | 3922 | subl foo(%reg1), %reg2 |
13ae64f3 | 3923 | movl foo(%reg1), %reg2 |
37e55690 | 3924 | addl foo(%reg1), %reg2 |
13ae64f3 JJ |
3925 | We change it into: |
3926 | subl $foo, %reg2 | |
37e55690 JJ |
3927 | movl $foo, %reg2 (6 byte form) |
3928 | addl $foo, %reg2. */ | |
13ae64f3 JJ |
3929 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
3930 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
13ae64f3 JJ |
3931 | if (type == 0x8b) |
3932 | { | |
3933 | /* movl */ | |
13ae64f3 JJ |
3934 | bfd_put_8 (output_bfd, 0xc7, |
3935 | contents + rel->r_offset - 2); | |
3936 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3937 | contents + rel->r_offset - 1); | |
3938 | } | |
3939 | else if (type == 0x2b) | |
3940 | { | |
3941 | /* subl */ | |
13ae64f3 JJ |
3942 | bfd_put_8 (output_bfd, 0x81, |
3943 | contents + rel->r_offset - 2); | |
3944 | bfd_put_8 (output_bfd, 0xe8 | ((val >> 3) & 7), | |
3945 | contents + rel->r_offset - 1); | |
3946 | } | |
37e55690 JJ |
3947 | else if (type == 0x03) |
3948 | { | |
3949 | /* addl */ | |
3950 | bfd_put_8 (output_bfd, 0x81, | |
3951 | contents + rel->r_offset - 2); | |
3952 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3953 | contents + rel->r_offset - 1); | |
3954 | } | |
13ae64f3 JJ |
3955 | else |
3956 | BFD_FAIL (); | |
37e55690 | 3957 | if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTIE) |
eb4ff4d6 | 3958 | bfd_put_32 (output_bfd, -elf_i386_tpoff (info, relocation), |
37e55690 JJ |
3959 | contents + rel->r_offset); |
3960 | else | |
eb4ff4d6 | 3961 | bfd_put_32 (output_bfd, elf_i386_tpoff (info, relocation), |
37e55690 | 3962 | contents + rel->r_offset); |
13ae64f3 JJ |
3963 | continue; |
3964 | } | |
3965 | } | |
3966 | ||
6de2ae4a | 3967 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
3968 | abort (); |
3969 | ||
3970 | if (h != NULL) | |
67a4f2b7 AO |
3971 | { |
3972 | off = h->got.offset; | |
3973 | offplt = elf_i386_hash_entry (h)->tlsdesc_got; | |
3974 | } | |
13ae64f3 JJ |
3975 | else |
3976 | { | |
3977 | if (local_got_offsets == NULL) | |
3978 | abort (); | |
3979 | ||
3980 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3981 | offplt = local_tlsdesc_gotents[r_symndx]; |
13ae64f3 JJ |
3982 | } |
3983 | ||
3984 | if ((off & 1) != 0) | |
3985 | off &= ~1; | |
26e41594 | 3986 | else |
13ae64f3 | 3987 | { |
947216bf | 3988 | Elf_Internal_Rela outrel; |
91d6fa6a | 3989 | int dr_type; |
67a4f2b7 | 3990 | asection *sreloc; |
13ae64f3 | 3991 | |
6de2ae4a | 3992 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
3993 | abort (); |
3994 | ||
67a4f2b7 AO |
3995 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3996 | ||
3997 | if (GOT_TLS_GDESC_P (tls_type)) | |
3998 | { | |
59d6ffb2 | 3999 | bfd_byte *loc; |
67a4f2b7 AO |
4000 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_DESC); |
4001 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt + 8 | |
6de2ae4a L |
4002 | <= htab->elf.sgotplt->size); |
4003 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
4004 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
4005 | + offplt |
4006 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 4007 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 4008 | loc = sreloc->contents; |
5ae0bfb6 RS |
4009 | loc += (htab->next_tls_desc_index++ |
4010 | * sizeof (Elf32_External_Rel)); | |
67a4f2b7 | 4011 | BFD_ASSERT (loc + sizeof (Elf32_External_Rel) |
c3b02097 | 4012 | <= sreloc->contents + sreloc->size); |
67a4f2b7 AO |
4013 | bfd_elf32_swap_reloc_out (output_bfd, &outrel, loc); |
4014 | if (indx == 0) | |
4015 | { | |
4016 | BFD_ASSERT (! unresolved_reloc); | |
4017 | bfd_put_32 (output_bfd, | |
eb4ff4d6 | 4018 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4019 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4020 | + htab->sgotplt_jump_table_size + 4); |
4021 | } | |
4022 | else | |
4023 | { | |
4024 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4025 | htab->elf.sgotplt->contents + offplt |
67a4f2b7 AO |
4026 | + htab->sgotplt_jump_table_size + 4); |
4027 | } | |
4028 | } | |
4029 | ||
6de2ae4a | 4030 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 4031 | |
6de2ae4a L |
4032 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4033 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 | 4034 | |
67a4f2b7 | 4035 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 | 4036 | dr_type = R_386_TLS_DTPMOD32; |
67a4f2b7 AO |
4037 | else if (GOT_TLS_GDESC_P (tls_type)) |
4038 | goto dr_done; | |
37e55690 JJ |
4039 | else if (tls_type == GOT_TLS_IE_POS) |
4040 | dr_type = R_386_TLS_TPOFF; | |
13ae64f3 JJ |
4041 | else |
4042 | dr_type = R_386_TLS_TPOFF32; | |
67a4f2b7 | 4043 | |
37e55690 | 4044 | if (dr_type == R_386_TLS_TPOFF && indx == 0) |
eb4ff4d6 L |
4045 | bfd_put_32 (output_bfd, |
4046 | relocation - elf_i386_dtpoff_base (info), | |
6de2ae4a | 4047 | htab->elf.sgot->contents + off); |
37e55690 | 4048 | else if (dr_type == R_386_TLS_TPOFF32 && indx == 0) |
23209a78 | 4049 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4050 | elf_i386_dtpoff_base (info) - relocation, |
6de2ae4a | 4051 | htab->elf.sgot->contents + off); |
67a4f2b7 | 4052 | else if (dr_type != R_386_TLS_DESC) |
c366c25e | 4053 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4054 | htab->elf.sgot->contents + off); |
13ae64f3 | 4055 | outrel.r_info = ELF32_R_INFO (indx, dr_type); |
67a4f2b7 | 4056 | |
59d6ffb2 | 4057 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 | 4058 | |
67a4f2b7 | 4059 | if (GOT_TLS_GD_P (tls_type)) |
13ae64f3 JJ |
4060 | { |
4061 | if (indx == 0) | |
4062 | { | |
82e51918 | 4063 | BFD_ASSERT (! unresolved_reloc); |
13ae64f3 | 4064 | bfd_put_32 (output_bfd, |
eb4ff4d6 | 4065 | relocation - elf_i386_dtpoff_base (info), |
6de2ae4a | 4066 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4067 | } |
4068 | else | |
4069 | { | |
4070 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4071 | htab->elf.sgot->contents + off + 4); |
13ae64f3 JJ |
4072 | outrel.r_info = ELF32_R_INFO (indx, |
4073 | R_386_TLS_DTPOFF32); | |
4074 | outrel.r_offset += 4; | |
59d6ffb2 | 4075 | elf_append_rel (output_bfd, sreloc, &outrel); |
13ae64f3 JJ |
4076 | } |
4077 | } | |
37e55690 JJ |
4078 | else if (tls_type == GOT_TLS_IE_BOTH) |
4079 | { | |
4080 | bfd_put_32 (output_bfd, | |
eb4ff4d6 L |
4081 | (indx == 0 |
4082 | ? relocation - elf_i386_dtpoff_base (info) | |
4083 | : 0), | |
6de2ae4a | 4084 | htab->elf.sgot->contents + off + 4); |
37e55690 JJ |
4085 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); |
4086 | outrel.r_offset += 4; | |
59d6ffb2 | 4087 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 | 4088 | } |
13ae64f3 | 4089 | |
67a4f2b7 | 4090 | dr_done: |
13ae64f3 JJ |
4091 | if (h != NULL) |
4092 | h->got.offset |= 1; | |
4093 | else | |
4094 | local_got_offsets[r_symndx] |= 1; | |
4095 | } | |
4096 | ||
67a4f2b7 AO |
4097 | if (off >= (bfd_vma) -2 |
4098 | && ! GOT_TLS_GDESC_P (tls_type)) | |
13ae64f3 | 4099 | abort (); |
67a4f2b7 AO |
4100 | if (r_type == R_386_TLS_GOTDESC |
4101 | || r_type == R_386_TLS_DESC_CALL) | |
4102 | { | |
4103 | relocation = htab->sgotplt_jump_table_size + offplt; | |
4104 | unresolved_reloc = FALSE; | |
4105 | } | |
4106 | else if (r_type == ELF32_R_TYPE (rel->r_info)) | |
13ae64f3 | 4107 | { |
6de2ae4a L |
4108 | bfd_vma g_o_t = htab->elf.sgotplt->output_section->vma |
4109 | + htab->elf.sgotplt->output_offset; | |
4110 | relocation = htab->elf.sgot->output_section->vma | |
4111 | + htab->elf.sgot->output_offset + off - g_o_t; | |
37e55690 JJ |
4112 | if ((r_type == R_386_TLS_IE || r_type == R_386_TLS_GOTIE) |
4113 | && tls_type == GOT_TLS_IE_BOTH) | |
4114 | relocation += 4; | |
4115 | if (r_type == R_386_TLS_IE) | |
8c37241b | 4116 | relocation += g_o_t; |
b34976b6 | 4117 | unresolved_reloc = FALSE; |
13ae64f3 | 4118 | } |
67a4f2b7 | 4119 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GD) |
13ae64f3 JJ |
4120 | { |
4121 | unsigned int val, type; | |
4122 | bfd_vma roff; | |
4123 | ||
4124 | /* GD->IE transition. */ | |
13ae64f3 | 4125 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); |
13ae64f3 JJ |
4126 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); |
4127 | if (type == 0x04) | |
4128 | { | |
4129 | /* leal foo(,%reg,1), %eax; call ___tls_get_addr | |
4130 | Change it into: | |
4131 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 | 4132 | val >>= 3; |
142411ca | 4133 | roff = rel->r_offset - 3; |
13ae64f3 JJ |
4134 | } |
4135 | else | |
4136 | { | |
4137 | /* leal foo(%reg), %eax; call ___tls_get_addr; nop | |
4138 | Change it into: | |
4139 | movl %gs:0, %eax; subl $foo@gottpoff(%reg), %eax. */ | |
13ae64f3 JJ |
4140 | roff = rel->r_offset - 2; |
4141 | } | |
4142 | memcpy (contents + roff, | |
4143 | "\x65\xa1\0\0\0\0\x2b\x80\0\0\0", 12); | |
4144 | contents[roff + 7] = 0x80 | (val & 7); | |
37e55690 JJ |
4145 | /* If foo is used only with foo@gotntpoff(%reg) and |
4146 | foo@indntpoff, but not with foo@gottpoff(%reg), change | |
4147 | subl $foo@gottpoff(%reg), %eax | |
4148 | into: | |
4149 | addl $foo@gotntpoff(%reg), %eax. */ | |
ebcfb3c0 JJ |
4150 | if (tls_type == GOT_TLS_IE_POS) |
4151 | contents[roff + 6] = 0x03; | |
8c37241b | 4152 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4153 | htab->elf.sgot->output_section->vma |
4154 | + htab->elf.sgot->output_offset + off | |
4155 | - htab->elf.sgotplt->output_section->vma | |
4156 | - htab->elf.sgotplt->output_offset, | |
13ae64f3 JJ |
4157 | contents + roff + 8); |
4158 | /* Skip R_386_PLT32. */ | |
4159 | rel++; | |
4160 | continue; | |
4161 | } | |
67a4f2b7 AO |
4162 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_GOTDESC) |
4163 | { | |
4164 | /* GDesc -> IE transition. | |
4165 | It's originally something like: | |
4166 | leal x@tlsdesc(%ebx), %eax | |
4167 | ||
4168 | Change it to: | |
142411ca | 4169 | movl x@gotntpoff(%ebx), %eax # before xchg %ax,%ax |
67a4f2b7 AO |
4170 | or: |
4171 | movl x@gottpoff(%ebx), %eax # before negl %eax | |
4172 | ||
4173 | Registers other than %eax may be set up here. */ | |
4174 | ||
67a4f2b7 AO |
4175 | bfd_vma roff; |
4176 | ||
4177 | /* First, make sure it's a leal adding ebx to a 32-bit | |
4178 | offset into any register, although it's probably | |
4179 | almost always going to be eax. */ | |
4180 | roff = rel->r_offset; | |
67a4f2b7 AO |
4181 | |
4182 | /* Now modify the instruction as appropriate. */ | |
4183 | /* To turn a leal into a movl in the form we use it, it | |
4184 | suffices to change the first byte from 0x8d to 0x8b. | |
4185 | aoliva FIXME: should we decide to keep the leal, all | |
4186 | we have to do is remove the statement below, and | |
4187 | adjust the relaxation of R_386_TLS_DESC_CALL. */ | |
4188 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
4189 | ||
4190 | if (tls_type == GOT_TLS_IE_BOTH) | |
4191 | off += 4; | |
4192 | ||
4193 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4194 | htab->elf.sgot->output_section->vma |
4195 | + htab->elf.sgot->output_offset + off | |
4196 | - htab->elf.sgotplt->output_section->vma | |
4197 | - htab->elf.sgotplt->output_offset, | |
67a4f2b7 AO |
4198 | contents + roff); |
4199 | continue; | |
4200 | } | |
4201 | else if (ELF32_R_TYPE (rel->r_info) == R_386_TLS_DESC_CALL) | |
4202 | { | |
4203 | /* GDesc -> IE transition. | |
4204 | It's originally: | |
4205 | call *(%eax) | |
4206 | ||
4207 | Change it to: | |
142411ca | 4208 | xchg %ax,%ax |
67a4f2b7 AO |
4209 | or |
4210 | negl %eax | |
4211 | depending on how we transformed the TLS_GOTDESC above. | |
4212 | */ | |
4213 | ||
67a4f2b7 AO |
4214 | bfd_vma roff; |
4215 | ||
67a4f2b7 | 4216 | roff = rel->r_offset; |
67a4f2b7 AO |
4217 | |
4218 | /* Now modify the instruction as appropriate. */ | |
4219 | if (tls_type != GOT_TLS_IE_NEG) | |
4220 | { | |
10efb593 L |
4221 | /* xchg %ax,%ax */ |
4222 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
4223 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
4224 | } | |
4225 | else | |
4226 | { | |
4227 | /* negl %eax */ | |
4228 | bfd_put_8 (output_bfd, 0xf7, contents + roff); | |
4229 | bfd_put_8 (output_bfd, 0xd8, contents + roff + 1); | |
4230 | } | |
4231 | ||
4232 | continue; | |
4233 | } | |
4234 | else | |
4235 | BFD_ASSERT (FALSE); | |
13ae64f3 JJ |
4236 | break; |
4237 | ||
4238 | case R_386_TLS_LDM: | |
142411ca L |
4239 | if (! elf_i386_tls_transition (info, input_bfd, |
4240 | input_section, contents, | |
4241 | symtab_hdr, sym_hashes, | |
4242 | &r_type, GOT_UNKNOWN, rel, | |
4c544807 | 4243 | relend, h, r_symndx)) |
142411ca | 4244 | return FALSE; |
13ae64f3 | 4245 | |
142411ca L |
4246 | if (r_type != R_386_TLS_LDM) |
4247 | { | |
13ae64f3 | 4248 | /* LD->LE transition: |
13ae64f3 JJ |
4249 | leal foo(%reg), %eax; call ___tls_get_addr. |
4250 | We change it into: | |
4251 | movl %gs:0, %eax; nop; leal 0(%esi,1), %esi. */ | |
142411ca | 4252 | BFD_ASSERT (r_type == R_386_TLS_LE_32); |
13ae64f3 JJ |
4253 | memcpy (contents + rel->r_offset - 2, |
4254 | "\x65\xa1\0\0\0\0\x90\x8d\x74\x26", 11); | |
a3fadc9a | 4255 | /* Skip R_386_PC32/R_386_PLT32. */ |
13ae64f3 JJ |
4256 | rel++; |
4257 | continue; | |
4258 | } | |
4259 | ||
6de2ae4a | 4260 | if (htab->elf.sgot == NULL) |
13ae64f3 JJ |
4261 | abort (); |
4262 | ||
4263 | off = htab->tls_ldm_got.offset; | |
4264 | if (off & 1) | |
4265 | off &= ~1; | |
4266 | else | |
4267 | { | |
947216bf | 4268 | Elf_Internal_Rela outrel; |
13ae64f3 | 4269 | |
6de2ae4a | 4270 | if (htab->elf.srelgot == NULL) |
13ae64f3 JJ |
4271 | abort (); |
4272 | ||
6de2ae4a L |
4273 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
4274 | + htab->elf.sgot->output_offset + off); | |
13ae64f3 JJ |
4275 | |
4276 | bfd_put_32 (output_bfd, 0, | |
6de2ae4a | 4277 | htab->elf.sgot->contents + off); |
13ae64f3 | 4278 | bfd_put_32 (output_bfd, 0, |
6de2ae4a | 4279 | htab->elf.sgot->contents + off + 4); |
13ae64f3 | 4280 | outrel.r_info = ELF32_R_INFO (0, R_386_TLS_DTPMOD32); |
59d6ffb2 | 4281 | elf_append_rel (output_bfd, htab->elf.srelgot, &outrel); |
13ae64f3 JJ |
4282 | htab->tls_ldm_got.offset |= 1; |
4283 | } | |
6de2ae4a L |
4284 | relocation = htab->elf.sgot->output_section->vma |
4285 | + htab->elf.sgot->output_offset + off | |
4286 | - htab->elf.sgotplt->output_section->vma | |
4287 | - htab->elf.sgotplt->output_offset; | |
b34976b6 | 4288 | unresolved_reloc = FALSE; |
13ae64f3 JJ |
4289 | break; |
4290 | ||
4291 | case R_386_TLS_LDO_32: | |
959b0961 | 4292 | if (!info->executable || (input_section->flags & SEC_CODE) == 0) |
eb4ff4d6 | 4293 | relocation -= elf_i386_dtpoff_base (info); |
13ae64f3 JJ |
4294 | else |
4295 | /* When converting LDO to LE, we must negate. */ | |
eb4ff4d6 | 4296 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4297 | break; |
4298 | ||
4299 | case R_386_TLS_LE_32: | |
13ae64f3 | 4300 | case R_386_TLS_LE: |
1d85728f | 4301 | if (!info->executable) |
37e55690 | 4302 | { |
947216bf | 4303 | Elf_Internal_Rela outrel; |
37e55690 | 4304 | asection *sreloc; |
37e55690 JJ |
4305 | |
4306 | outrel.r_offset = rel->r_offset | |
4307 | + input_section->output_section->vma | |
4308 | + input_section->output_offset; | |
4309 | if (h != NULL && h->dynindx != -1) | |
4310 | indx = h->dynindx; | |
4311 | else | |
4312 | indx = 0; | |
4313 | if (r_type == R_386_TLS_LE_32) | |
4314 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF32); | |
4315 | else | |
4316 | outrel.r_info = ELF32_R_INFO (indx, R_386_TLS_TPOFF); | |
4317 | sreloc = elf_section_data (input_section)->sreloc; | |
4318 | if (sreloc == NULL) | |
4319 | abort (); | |
59d6ffb2 | 4320 | elf_append_rel (output_bfd, sreloc, &outrel); |
37e55690 JJ |
4321 | if (indx) |
4322 | continue; | |
4323 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4324 | relocation = elf_i386_dtpoff_base (info) - relocation; |
37e55690 | 4325 | else |
eb4ff4d6 | 4326 | relocation -= elf_i386_dtpoff_base (info); |
37e55690 JJ |
4327 | } |
4328 | else if (r_type == R_386_TLS_LE_32) | |
eb4ff4d6 | 4329 | relocation = elf_i386_tpoff (info, relocation); |
37e55690 | 4330 | else |
eb4ff4d6 | 4331 | relocation = -elf_i386_tpoff (info, relocation); |
13ae64f3 JJ |
4332 | break; |
4333 | ||
252b5132 RH |
4334 | default: |
4335 | break; | |
4336 | } | |
4337 | ||
239e1f3a AM |
4338 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
4339 | because such sections are not SEC_ALLOC and thus ld.so will | |
4340 | not process them. */ | |
8c694914 | 4341 | if (unresolved_reloc |
239e1f3a | 4342 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
1d5316ab AM |
4343 | && h->def_dynamic) |
4344 | && _bfd_elf_section_offset (output_bfd, info, input_section, | |
4345 | rel->r_offset) != (bfd_vma) -1) | |
6a30718d JJ |
4346 | { |
4347 | (*_bfd_error_handler) | |
843fe662 | 4348 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
4349 | input_bfd, |
4350 | input_section, | |
6a30718d | 4351 | (long) rel->r_offset, |
843fe662 | 4352 | howto->name, |
6a30718d | 4353 | h->root.root.string); |
b34976b6 | 4354 | return FALSE; |
6a30718d | 4355 | } |
83be169b | 4356 | |
cbe950e9 | 4357 | do_relocation: |
252b5132 RH |
4358 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
4359 | contents, rel->r_offset, | |
55fd94b0 | 4360 | relocation, 0); |
252b5132 | 4361 | |
62d78908 | 4362 | check_relocation_error: |
cf5c0c5b | 4363 | if (r != bfd_reloc_ok) |
252b5132 | 4364 | { |
cf5c0c5b | 4365 | const char *name; |
ffb2e45b | 4366 | |
cf5c0c5b AM |
4367 | if (h != NULL) |
4368 | name = h->root.root.string; | |
4369 | else | |
4370 | { | |
4371 | name = bfd_elf_string_from_elf_section (input_bfd, | |
4372 | symtab_hdr->sh_link, | |
4373 | sym->st_name); | |
4374 | if (name == NULL) | |
b34976b6 | 4375 | return FALSE; |
cf5c0c5b AM |
4376 | if (*name == '\0') |
4377 | name = bfd_section_name (input_bfd, sec); | |
4378 | } | |
ffb2e45b | 4379 | |
cf5c0c5b AM |
4380 | if (r == bfd_reloc_overflow) |
4381 | { | |
cf5c0c5b | 4382 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
4383 | (info, (h ? &h->root : NULL), name, howto->name, |
4384 | (bfd_vma) 0, input_bfd, input_section, | |
4385 | rel->r_offset))) | |
b34976b6 | 4386 | return FALSE; |
cf5c0c5b AM |
4387 | } |
4388 | else | |
4389 | { | |
4390 | (*_bfd_error_handler) | |
d003868e AM |
4391 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
4392 | input_bfd, input_section, | |
cf5c0c5b | 4393 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 4394 | return FALSE; |
cf5c0c5b | 4395 | } |
252b5132 RH |
4396 | } |
4397 | } | |
4398 | ||
b34976b6 | 4399 | return TRUE; |
252b5132 RH |
4400 | } |
4401 | ||
4402 | /* Finish up dynamic symbol handling. We set the contents of various | |
4403 | dynamic sections here. */ | |
4404 | ||
b34976b6 | 4405 | static bfd_boolean |
55fd94b0 AM |
4406 | elf_i386_finish_dynamic_symbol (bfd *output_bfd, |
4407 | struct bfd_link_info *info, | |
4408 | struct elf_link_hash_entry *h, | |
4409 | Elf_Internal_Sym *sym) | |
252b5132 | 4410 | { |
6725bdbf | 4411 | struct elf_i386_link_hash_table *htab; |
25e762b9 RM |
4412 | unsigned plt_entry_size; |
4413 | const struct elf_i386_backend_data *abed; | |
252b5132 | 4414 | |
6725bdbf | 4415 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4416 | if (htab == NULL) |
4417 | return FALSE; | |
252b5132 | 4418 | |
25e762b9 RM |
4419 | abed = get_elf_i386_backend_data (output_bfd); |
4420 | plt_entry_size = GET_PLT_ENTRY_SIZE (output_bfd); | |
4421 | ||
252b5132 RH |
4422 | if (h->plt.offset != (bfd_vma) -1) |
4423 | { | |
252b5132 RH |
4424 | bfd_vma plt_index; |
4425 | bfd_vma got_offset; | |
947216bf AM |
4426 | Elf_Internal_Rela rel; |
4427 | bfd_byte *loc; | |
cbe950e9 L |
4428 | asection *plt, *gotplt, *relplt; |
4429 | ||
4430 | /* When building a static executable, use .iplt, .igot.plt and | |
4431 | .rel.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 4432 | if (htab->elf.splt != NULL) |
cbe950e9 | 4433 | { |
6de2ae4a L |
4434 | plt = htab->elf.splt; |
4435 | gotplt = htab->elf.sgotplt; | |
4436 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
4437 | } |
4438 | else | |
4439 | { | |
6de2ae4a L |
4440 | plt = htab->elf.iplt; |
4441 | gotplt = htab->elf.igotplt; | |
4442 | relplt = htab->elf.irelplt; | |
cbe950e9 | 4443 | } |
252b5132 RH |
4444 | |
4445 | /* This symbol has an entry in the procedure linkage table. Set | |
4446 | it up. */ | |
4447 | ||
cbe950e9 L |
4448 | if ((h->dynindx == -1 |
4449 | && !((h->forced_local || info->executable) | |
4450 | && h->def_regular | |
4451 | && h->type == STT_GNU_IFUNC)) | |
4452 | || plt == NULL | |
4453 | || gotplt == NULL | |
4454 | || relplt == NULL) | |
cec7f46a | 4455 | abort (); |
252b5132 RH |
4456 | |
4457 | /* Get the index in the procedure linkage table which | |
4458 | corresponds to this symbol. This is the index of this symbol | |
4459 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 4460 | first entry in the procedure linkage table is reserved. |
252b5132 | 4461 | |
cbe950e9 | 4462 | Get the offset into the .got table of the entry that |
252b5132 | 4463 | corresponds to this function. Each .got entry is 4 bytes. |
cbe950e9 | 4464 | The first three are reserved. |
6bbec505 | 4465 | |
cbe950e9 L |
4466 | For static executables, we don't reserve anything. */ |
4467 | ||
6de2ae4a | 4468 | if (plt == htab->elf.splt) |
cbe950e9 | 4469 | { |
e1f98742 L |
4470 | got_offset = h->plt.offset / plt_entry_size - 1; |
4471 | got_offset = (got_offset + 3) * 4; | |
cbe950e9 L |
4472 | } |
4473 | else | |
4474 | { | |
e1f98742 L |
4475 | got_offset = h->plt.offset / plt_entry_size; |
4476 | got_offset = got_offset * 4; | |
cbe950e9 | 4477 | } |
252b5132 RH |
4478 | |
4479 | /* Fill in the entry in the procedure linkage table. */ | |
4480 | if (! info->shared) | |
4481 | { | |
25e762b9 RM |
4482 | memcpy (plt->contents + h->plt.offset, abed->plt->plt_entry, |
4483 | abed->plt->plt_entry_size); | |
252b5132 | 4484 | bfd_put_32 (output_bfd, |
cbe950e9 L |
4485 | (gotplt->output_section->vma |
4486 | + gotplt->output_offset | |
252b5132 | 4487 | + got_offset), |
25e762b9 RM |
4488 | plt->contents + h->plt.offset |
4489 | + abed->plt->plt_got_offset); | |
eac338cf | 4490 | |
25e762b9 | 4491 | if (abed->is_vxworks) |
eac338cf PB |
4492 | { |
4493 | int s, k, reloc_index; | |
4494 | ||
4495 | /* Create the R_386_32 relocation referencing the GOT | |
4496 | for this PLT entry. */ | |
4497 | ||
4498 | /* S: Current slot number (zero-based). */ | |
25e762b9 RM |
4499 | s = ((h->plt.offset - abed->plt->plt_entry_size) |
4500 | / abed->plt->plt_entry_size); | |
eac338cf PB |
4501 | /* K: Number of relocations for PLTResolve. */ |
4502 | if (info->shared) | |
4503 | k = PLTRESOLVE_RELOCS_SHLIB; | |
4504 | else | |
4505 | k = PLTRESOLVE_RELOCS; | |
4506 | /* Skip the PLTresolve relocations, and the relocations for | |
4507 | the other PLT slots. */ | |
4508 | reloc_index = k + s * PLT_NON_JUMP_SLOT_RELOCS; | |
4509 | loc = (htab->srelplt2->contents + reloc_index | |
4510 | * sizeof (Elf32_External_Rel)); | |
4511 | ||
6de2ae4a L |
4512 | rel.r_offset = (htab->elf.splt->output_section->vma |
4513 | + htab->elf.splt->output_offset | |
eac338cf | 4514 | + h->plt.offset + 2), |
7325306f | 4515 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4516 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
4517 | ||
4518 | /* Create the R_386_32 relocation referencing the beginning of | |
4519 | the PLT for this GOT entry. */ | |
6de2ae4a L |
4520 | rel.r_offset = (htab->elf.sgotplt->output_section->vma |
4521 | + htab->elf.sgotplt->output_offset | |
eac338cf | 4522 | + got_offset); |
7325306f | 4523 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf | 4524 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
13ca3149 | 4525 | loc + sizeof (Elf32_External_Rel)); |
eac338cf | 4526 | } |
252b5132 RH |
4527 | } |
4528 | else | |
4529 | { | |
25e762b9 RM |
4530 | memcpy (plt->contents + h->plt.offset, abed->plt->pic_plt_entry, |
4531 | abed->plt->plt_entry_size); | |
252b5132 | 4532 | bfd_put_32 (output_bfd, got_offset, |
25e762b9 RM |
4533 | plt->contents + h->plt.offset |
4534 | + abed->plt->plt_got_offset); | |
252b5132 RH |
4535 | } |
4536 | ||
252b5132 RH |
4537 | /* Fill in the entry in the global offset table. */ |
4538 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4539 | (plt->output_section->vma |
4540 | + plt->output_offset | |
252b5132 | 4541 | + h->plt.offset |
25e762b9 | 4542 | + abed->plt->plt_lazy_offset), |
cbe950e9 | 4543 | gotplt->contents + got_offset); |
252b5132 RH |
4544 | |
4545 | /* Fill in the entry in the .rel.plt section. */ | |
cbe950e9 L |
4546 | rel.r_offset = (gotplt->output_section->vma |
4547 | + gotplt->output_offset | |
252b5132 | 4548 | + got_offset); |
cbe950e9 L |
4549 | if (h->dynindx == -1 |
4550 | || ((info->executable | |
4551 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4552 | && h->def_regular | |
4553 | && h->type == STT_GNU_IFUNC)) | |
4554 | { | |
4555 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4556 | R_386_IRELATIVE instead of R_386_JUMP_SLOT. Store addend | |
4557 | in the .got.plt section. */ | |
4558 | bfd_put_32 (output_bfd, | |
23209a78 | 4559 | (h->root.u.def.value |
cbe950e9 L |
4560 | + h->root.u.def.section->output_section->vma |
4561 | + h->root.u.def.section->output_offset), | |
4562 | gotplt->contents + got_offset); | |
4563 | rel.r_info = ELF32_R_INFO (0, R_386_IRELATIVE); | |
e1f98742 L |
4564 | /* R_386_IRELATIVE comes last. */ |
4565 | plt_index = htab->next_irelative_index--; | |
cbe950e9 L |
4566 | } |
4567 | else | |
e1f98742 L |
4568 | { |
4569 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_JUMP_SLOT); | |
4570 | plt_index = htab->next_jump_slot_index++; | |
4571 | } | |
cbe950e9 | 4572 | loc = relplt->contents + plt_index * sizeof (Elf32_External_Rel); |
0ac8d2ca | 4573 | bfd_elf32_swap_reloc_out (output_bfd, &rel, loc); |
252b5132 | 4574 | |
e1f98742 L |
4575 | /* Don't fill PLT entry for static executables. */ |
4576 | if (plt == htab->elf.splt) | |
4577 | { | |
4578 | bfd_put_32 (output_bfd, plt_index * sizeof (Elf32_External_Rel), | |
4579 | plt->contents + h->plt.offset | |
4580 | + abed->plt->plt_reloc_offset); | |
4581 | bfd_put_32 (output_bfd, - (h->plt.offset | |
4582 | + abed->plt->plt_plt_offset + 4), | |
4583 | plt->contents + h->plt.offset | |
4584 | + abed->plt->plt_plt_offset); | |
4585 | } | |
4586 | ||
f5385ebf | 4587 | if (!h->def_regular) |
252b5132 RH |
4588 | { |
4589 | /* Mark the symbol as undefined, rather than as defined in | |
c6585bbb JJ |
4590 | the .plt section. Leave the value if there were any |
4591 | relocations where pointer equality matters (this is a clue | |
51b64d56 AM |
4592 | for the dynamic linker, to make function pointer |
4593 | comparisons work between an application and shared | |
c6585bbb JJ |
4594 | library), otherwise set it to zero. If a function is only |
4595 | called from a binary, there is no need to slow down | |
4596 | shared libraries because of that. */ | |
252b5132 | 4597 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4598 | if (!h->pointer_equality_needed) |
c6585bbb | 4599 | sym->st_value = 0; |
252b5132 RH |
4600 | } |
4601 | } | |
4602 | ||
13ae64f3 | 4603 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 4604 | && ! GOT_TLS_GD_ANY_P (elf_i386_hash_entry(h)->tls_type) |
37e55690 | 4605 | && (elf_i386_hash_entry(h)->tls_type & GOT_TLS_IE) == 0) |
252b5132 | 4606 | { |
947216bf | 4607 | Elf_Internal_Rela rel; |
252b5132 RH |
4608 | |
4609 | /* This symbol has an entry in the global offset table. Set it | |
4610 | up. */ | |
4611 | ||
6de2ae4a | 4612 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
ffb2e45b | 4613 | abort (); |
252b5132 | 4614 | |
6de2ae4a L |
4615 | rel.r_offset = (htab->elf.sgot->output_section->vma |
4616 | + htab->elf.sgot->output_offset | |
dc810e39 | 4617 | + (h->got.offset & ~(bfd_vma) 1)); |
252b5132 | 4618 | |
dd5724d5 AM |
4619 | /* If this is a static link, or it is a -Bsymbolic link and the |
4620 | symbol is defined locally or was forced to be local because | |
4621 | of a version file, we just want to emit a RELATIVE reloc. | |
252b5132 RH |
4622 | The entry in the global offset table will already have been |
4623 | initialized in the relocate_section function. */ | |
710ab287 | 4624 | if (h->def_regular |
0018b0a3 L |
4625 | && h->type == STT_GNU_IFUNC) |
4626 | { | |
710ab287 L |
4627 | if (info->shared) |
4628 | { | |
4629 | /* Generate R_386_GLOB_DAT. */ | |
4630 | goto do_glob_dat; | |
4631 | } | |
4632 | else | |
4633 | { | |
cd2b2c10 L |
4634 | asection *plt; |
4635 | ||
710ab287 L |
4636 | if (!h->pointer_equality_needed) |
4637 | abort (); | |
4638 | ||
4639 | /* For non-shared object, we can't use .got.plt, which | |
4640 | contains the real function addres if we need pointer | |
4641 | equality. We load the GOT entry with the PLT entry. */ | |
cd2b2c10 | 4642 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4643 | bfd_put_32 (output_bfd, |
4644 | (plt->output_section->vma | |
4645 | + plt->output_offset + h->plt.offset), | |
6de2ae4a | 4646 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4647 | return TRUE; |
4648 | } | |
0018b0a3 L |
4649 | } |
4650 | else if (info->shared | |
4651 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
dd5724d5 | 4652 | { |
6725bdbf | 4653 | BFD_ASSERT((h->got.offset & 1) != 0); |
dd5724d5 AM |
4654 | rel.r_info = ELF32_R_INFO (0, R_386_RELATIVE); |
4655 | } | |
252b5132 RH |
4656 | else |
4657 | { | |
dd5724d5 | 4658 | BFD_ASSERT((h->got.offset & 1) == 0); |
710ab287 | 4659 | do_glob_dat: |
6725bdbf | 4660 | bfd_put_32 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4661 | htab->elf.sgot->contents + h->got.offset); |
252b5132 RH |
4662 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_GLOB_DAT); |
4663 | } | |
4664 | ||
59d6ffb2 | 4665 | elf_append_rel (output_bfd, htab->elf.srelgot, &rel); |
252b5132 RH |
4666 | } |
4667 | ||
f5385ebf | 4668 | if (h->needs_copy) |
252b5132 | 4669 | { |
947216bf | 4670 | Elf_Internal_Rela rel; |
252b5132 RH |
4671 | |
4672 | /* This symbol needs a copy reloc. Set it up. */ | |
4673 | ||
ffb2e45b AM |
4674 | if (h->dynindx == -1 |
4675 | || (h->root.type != bfd_link_hash_defined | |
4676 | && h->root.type != bfd_link_hash_defweak) | |
4677 | || htab->srelbss == NULL) | |
4678 | abort (); | |
252b5132 RH |
4679 | |
4680 | rel.r_offset = (h->root.u.def.value | |
4681 | + h->root.u.def.section->output_section->vma | |
4682 | + h->root.u.def.section->output_offset); | |
4683 | rel.r_info = ELF32_R_INFO (h->dynindx, R_386_COPY); | |
59d6ffb2 | 4684 | elf_append_rel (output_bfd, htab->srelbss, &rel); |
252b5132 RH |
4685 | } |
4686 | ||
b34976b6 | 4687 | return TRUE; |
252b5132 RH |
4688 | } |
4689 | ||
c25bc9fc L |
4690 | /* Finish up local dynamic symbol handling. We set the contents of |
4691 | various dynamic sections here. */ | |
4692 | ||
4693 | static bfd_boolean | |
4694 | elf_i386_finish_local_dynamic_symbol (void **slot, void *inf) | |
4695 | { | |
4696 | struct elf_link_hash_entry *h | |
4697 | = (struct elf_link_hash_entry *) *slot; | |
4698 | struct bfd_link_info *info | |
23209a78 | 4699 | = (struct bfd_link_info *) inf; |
c25bc9fc L |
4700 | |
4701 | return elf_i386_finish_dynamic_symbol (info->output_bfd, info, | |
4702 | h, NULL); | |
4703 | } | |
4704 | ||
38701953 AM |
4705 | /* Used to decide how to sort relocs in an optimal manner for the |
4706 | dynamic linker, before writing them out. */ | |
4707 | ||
4708 | static enum elf_reloc_type_class | |
55fd94b0 | 4709 | elf_i386_reloc_type_class (const Elf_Internal_Rela *rela) |
38701953 | 4710 | { |
55fd94b0 | 4711 | switch (ELF32_R_TYPE (rela->r_info)) |
38701953 AM |
4712 | { |
4713 | case R_386_RELATIVE: | |
4714 | return reloc_class_relative; | |
4715 | case R_386_JUMP_SLOT: | |
4716 | return reloc_class_plt; | |
4717 | case R_386_COPY: | |
4718 | return reloc_class_copy; | |
4719 | default: | |
4720 | return reloc_class_normal; | |
4721 | } | |
4722 | } | |
4723 | ||
252b5132 RH |
4724 | /* Finish up the dynamic sections. */ |
4725 | ||
b34976b6 | 4726 | static bfd_boolean |
55fd94b0 AM |
4727 | elf_i386_finish_dynamic_sections (bfd *output_bfd, |
4728 | struct bfd_link_info *info) | |
252b5132 | 4729 | { |
6725bdbf | 4730 | struct elf_i386_link_hash_table *htab; |
252b5132 | 4731 | bfd *dynobj; |
252b5132 | 4732 | asection *sdyn; |
25e762b9 | 4733 | const struct elf_i386_backend_data *abed; |
252b5132 | 4734 | |
6725bdbf | 4735 | htab = elf_i386_hash_table (info); |
4dfe6ac6 NC |
4736 | if (htab == NULL) |
4737 | return FALSE; | |
4738 | ||
ebe50bae | 4739 | dynobj = htab->elf.dynobj; |
3d4d4302 | 4740 | sdyn = bfd_get_linker_section (dynobj, ".dynamic"); |
25e762b9 | 4741 | abed = get_elf_i386_backend_data (output_bfd); |
252b5132 | 4742 | |
ebe50bae | 4743 | if (htab->elf.dynamic_sections_created) |
252b5132 | 4744 | { |
252b5132 RH |
4745 | Elf32_External_Dyn *dyncon, *dynconend; |
4746 | ||
6de2ae4a | 4747 | if (sdyn == NULL || htab->elf.sgot == NULL) |
ffb2e45b | 4748 | abort (); |
252b5132 RH |
4749 | |
4750 | dyncon = (Elf32_External_Dyn *) sdyn->contents; | |
eea6121a | 4751 | dynconend = (Elf32_External_Dyn *) (sdyn->contents + sdyn->size); |
252b5132 RH |
4752 | for (; dyncon < dynconend; dyncon++) |
4753 | { | |
4754 | Elf_Internal_Dyn dyn; | |
51b64d56 | 4755 | asection *s; |
252b5132 RH |
4756 | |
4757 | bfd_elf32_swap_dyn_in (dynobj, dyncon, &dyn); | |
4758 | ||
4759 | switch (dyn.d_tag) | |
4760 | { | |
4761 | default: | |
25e762b9 RM |
4762 | if (abed->is_vxworks |
4763 | && elf_vxworks_finish_dynamic_entry (output_bfd, &dyn)) | |
7a2b07ff | 4764 | break; |
0ac8d2ca | 4765 | continue; |
252b5132 RH |
4766 | |
4767 | case DT_PLTGOT: | |
6de2ae4a | 4768 | s = htab->elf.sgotplt; |
8c37241b | 4769 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
6725bdbf AM |
4770 | break; |
4771 | ||
252b5132 | 4772 | case DT_JMPREL: |
6de2ae4a | 4773 | s = htab->elf.srelplt; |
6348e046 | 4774 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
252b5132 RH |
4775 | break; |
4776 | ||
4777 | case DT_PLTRELSZ: | |
6de2ae4a | 4778 | s = htab->elf.srelplt; |
eea6121a | 4779 | dyn.d_un.d_val = s->size; |
252b5132 RH |
4780 | break; |
4781 | ||
4782 | case DT_RELSZ: | |
4783 | /* My reading of the SVR4 ABI indicates that the | |
4784 | procedure linkage table relocs (DT_JMPREL) should be | |
4785 | included in the overall relocs (DT_REL). This is | |
4786 | what Solaris does. However, UnixWare can not handle | |
4787 | that case. Therefore, we override the DT_RELSZ entry | |
6348e046 | 4788 | here to make it not include the JMPREL relocs. */ |
6de2ae4a | 4789 | s = htab->elf.srelplt; |
6348e046 AM |
4790 | if (s == NULL) |
4791 | continue; | |
eea6121a | 4792 | dyn.d_un.d_val -= s->size; |
6348e046 AM |
4793 | break; |
4794 | ||
4795 | case DT_REL: | |
4796 | /* We may not be using the standard ELF linker script. | |
4797 | If .rel.plt is the first .rel section, we adjust | |
4798 | DT_REL to not include it. */ | |
6de2ae4a | 4799 | s = htab->elf.srelplt; |
6348e046 AM |
4800 | if (s == NULL) |
4801 | continue; | |
4802 | if (dyn.d_un.d_ptr != s->output_section->vma + s->output_offset) | |
4803 | continue; | |
eea6121a | 4804 | dyn.d_un.d_ptr += s->size; |
252b5132 RH |
4805 | break; |
4806 | } | |
0ac8d2ca AM |
4807 | |
4808 | bfd_elf32_swap_dyn_out (output_bfd, &dyn, dyncon); | |
252b5132 RH |
4809 | } |
4810 | ||
4811 | /* Fill in the first entry in the procedure linkage table. */ | |
6de2ae4a | 4812 | if (htab->elf.splt && htab->elf.splt->size > 0) |
252b5132 RH |
4813 | { |
4814 | if (info->shared) | |
eac338cf | 4815 | { |
25e762b9 RM |
4816 | memcpy (htab->elf.splt->contents, abed->plt->pic_plt0_entry, |
4817 | abed->plt->plt0_entry_size); | |
4818 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
4819 | abed->plt0_pad_byte, | |
4820 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
eac338cf | 4821 | } |
252b5132 RH |
4822 | else |
4823 | { | |
25e762b9 RM |
4824 | memcpy (htab->elf.splt->contents, abed->plt->plt0_entry, |
4825 | abed->plt->plt0_entry_size); | |
4826 | memset (htab->elf.splt->contents + abed->plt->plt0_entry_size, | |
4827 | abed->plt0_pad_byte, | |
4828 | abed->plt->plt_entry_size - abed->plt->plt0_entry_size); | |
252b5132 | 4829 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4830 | (htab->elf.sgotplt->output_section->vma |
4831 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 4832 | + 4), |
25e762b9 RM |
4833 | htab->elf.splt->contents |
4834 | + abed->plt->plt0_got1_offset); | |
252b5132 | 4835 | bfd_put_32 (output_bfd, |
6de2ae4a L |
4836 | (htab->elf.sgotplt->output_section->vma |
4837 | + htab->elf.sgotplt->output_offset | |
6725bdbf | 4838 | + 8), |
25e762b9 RM |
4839 | htab->elf.splt->contents |
4840 | + abed->plt->plt0_got2_offset); | |
eac338cf | 4841 | |
25e762b9 | 4842 | if (abed->is_vxworks) |
eac338cf PB |
4843 | { |
4844 | Elf_Internal_Rela rel; | |
7325306f | 4845 | |
eac338cf PB |
4846 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 4. |
4847 | On IA32 we use REL relocations so the addend goes in | |
4848 | the PLT directly. */ | |
6de2ae4a L |
4849 | rel.r_offset = (htab->elf.splt->output_section->vma |
4850 | + htab->elf.splt->output_offset | |
25e762b9 | 4851 | + abed->plt->plt0_got1_offset); |
7325306f | 4852 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4853 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4854 | htab->srelplt2->contents); | |
4855 | /* Generate a relocation for _GLOBAL_OFFSET_TABLE_ + 8. */ | |
6de2ae4a L |
4856 | rel.r_offset = (htab->elf.splt->output_section->vma |
4857 | + htab->elf.splt->output_offset | |
25e762b9 | 4858 | + abed->plt->plt0_got2_offset); |
7325306f | 4859 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4860 | bfd_elf32_swap_reloc_out (output_bfd, &rel, |
4861 | htab->srelplt2->contents + | |
4862 | sizeof (Elf32_External_Rel)); | |
4863 | } | |
252b5132 RH |
4864 | } |
4865 | ||
4866 | /* UnixWare sets the entsize of .plt to 4, although that doesn't | |
4867 | really seem like the right value. */ | |
6de2ae4a | 4868 | elf_section_data (htab->elf.splt->output_section) |
6725bdbf | 4869 | ->this_hdr.sh_entsize = 4; |
eac338cf PB |
4870 | |
4871 | /* Correct the .rel.plt.unloaded relocations. */ | |
25e762b9 | 4872 | if (abed->is_vxworks && !info->shared) |
eac338cf | 4873 | { |
25e762b9 RM |
4874 | int num_plts = (htab->elf.splt->size |
4875 | / abed->plt->plt_entry_size) - 1; | |
4c9b0de6 | 4876 | unsigned char *p; |
eac338cf PB |
4877 | |
4878 | p = htab->srelplt2->contents; | |
4879 | if (info->shared) | |
4880 | p += PLTRESOLVE_RELOCS_SHLIB * sizeof (Elf32_External_Rel); | |
4881 | else | |
4882 | p += PLTRESOLVE_RELOCS * sizeof (Elf32_External_Rel); | |
4883 | ||
4884 | for (; num_plts; num_plts--) | |
4885 | { | |
4886 | Elf_Internal_Rela rel; | |
4887 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 4888 | rel.r_info = ELF32_R_INFO (htab->elf.hgot->indx, R_386_32); |
eac338cf PB |
4889 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4890 | p += sizeof (Elf32_External_Rel); | |
4891 | ||
4892 | bfd_elf32_swap_reloc_in (output_bfd, p, &rel); | |
7325306f | 4893 | rel.r_info = ELF32_R_INFO (htab->elf.hplt->indx, R_386_32); |
eac338cf PB |
4894 | bfd_elf32_swap_reloc_out (output_bfd, &rel, p); |
4895 | p += sizeof (Elf32_External_Rel); | |
4896 | } | |
4897 | } | |
252b5132 RH |
4898 | } |
4899 | } | |
4900 | ||
6de2ae4a | 4901 | if (htab->elf.sgotplt) |
252b5132 | 4902 | { |
56d4289c L |
4903 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4904 | { | |
4905 | (*_bfd_error_handler) | |
4906 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
4907 | return FALSE; | |
4908 | } | |
4909 | ||
12d0ee4a | 4910 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4911 | if (htab->elf.sgotplt->size > 0) |
12d0ee4a AM |
4912 | { |
4913 | bfd_put_32 (output_bfd, | |
55fd94b0 | 4914 | (sdyn == NULL ? 0 |
12d0ee4a | 4915 | : sdyn->output_section->vma + sdyn->output_offset), |
6de2ae4a L |
4916 | htab->elf.sgotplt->contents); |
4917 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 4); | |
4918 | bfd_put_32 (output_bfd, 0, htab->elf.sgotplt->contents + 8); | |
12d0ee4a | 4919 | } |
252b5132 | 4920 | |
6de2ae4a | 4921 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = 4; |
12d0ee4a | 4922 | } |
8c37241b | 4923 | |
e41b3a13 | 4924 | /* Adjust .eh_frame for .plt section. */ |
9a2a56cc AM |
4925 | if (htab->plt_eh_frame != NULL |
4926 | && htab->plt_eh_frame->contents != NULL) | |
e41b3a13 JJ |
4927 | { |
4928 | if (htab->elf.splt != NULL | |
4929 | && htab->elf.splt->size != 0 | |
4930 | && (htab->elf.splt->flags & SEC_EXCLUDE) == 0 | |
4931 | && htab->elf.splt->output_section != NULL | |
4932 | && htab->plt_eh_frame->output_section != NULL) | |
4933 | { | |
4934 | bfd_vma plt_start = htab->elf.splt->output_section->vma; | |
4935 | bfd_vma eh_frame_start = htab->plt_eh_frame->output_section->vma | |
4936 | + htab->plt_eh_frame->output_offset | |
4937 | + PLT_FDE_START_OFFSET; | |
4938 | bfd_put_signed_32 (dynobj, plt_start - eh_frame_start, | |
4939 | htab->plt_eh_frame->contents | |
4940 | + PLT_FDE_START_OFFSET); | |
4941 | } | |
4942 | if (htab->plt_eh_frame->sec_info_type | |
dbaa2011 | 4943 | == SEC_INFO_TYPE_EH_FRAME) |
e41b3a13 JJ |
4944 | { |
4945 | if (! _bfd_elf_write_section_eh_frame (output_bfd, info, | |
4946 | htab->plt_eh_frame, | |
4947 | htab->plt_eh_frame->contents)) | |
4948 | return FALSE; | |
4949 | } | |
4950 | } | |
4951 | ||
6de2ae4a L |
4952 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4953 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize = 4; | |
8c37241b | 4954 | |
c25bc9fc L |
4955 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4956 | htab_traverse (htab->loc_hash_table, | |
4957 | elf_i386_finish_local_dynamic_symbol, | |
4958 | info); | |
4959 | ||
b34976b6 | 4960 | return TRUE; |
252b5132 RH |
4961 | } |
4962 | ||
4c45e5c9 JJ |
4963 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4964 | or (bfd_vma) -1 if it should not be included. */ | |
4965 | ||
4966 | static bfd_vma | |
4967 | elf_i386_plt_sym_val (bfd_vma i, const asection *plt, | |
4968 | const arelent *rel ATTRIBUTE_UNUSED) | |
4969 | { | |
25e762b9 | 4970 | return plt->vma + (i + 1) * GET_PLT_ENTRY_SIZE (plt->owner); |
4c45e5c9 JJ |
4971 | } |
4972 | ||
fdc90cb4 JJ |
4973 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
4974 | ||
4975 | static bfd_boolean | |
4976 | elf_i386_hash_symbol (struct elf_link_hash_entry *h) | |
4977 | { | |
4978 | if (h->plt.offset != (bfd_vma) -1 | |
4979 | && !h->def_regular | |
4980 | && !h->pointer_equality_needed) | |
4981 | return FALSE; | |
4982 | ||
4983 | return _bfd_elf_hash_symbol (h); | |
4984 | } | |
4c45e5c9 | 4985 | |
d8045f23 NC |
4986 | /* Hook called by the linker routine which adds symbols from an object |
4987 | file. */ | |
4988 | ||
4989 | static bfd_boolean | |
c16153ae | 4990 | elf_i386_add_symbol_hook (bfd * abfd, |
d8045f23 NC |
4991 | struct bfd_link_info * info ATTRIBUTE_UNUSED, |
4992 | Elf_Internal_Sym * sym, | |
4993 | const char ** namep ATTRIBUTE_UNUSED, | |
4994 | flagword * flagsp ATTRIBUTE_UNUSED, | |
4995 | asection ** secp ATTRIBUTE_UNUSED, | |
4996 | bfd_vma * valp ATTRIBUTE_UNUSED) | |
4997 | { | |
c16153ae | 4998 | if ((abfd->flags & DYNAMIC) == 0 |
f64b2e8d NC |
4999 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
5000 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) | |
5001 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; | |
d8045f23 NC |
5002 | |
5003 | return TRUE; | |
5004 | } | |
5005 | ||
252b5132 RH |
5006 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vec |
5007 | #define TARGET_LITTLE_NAME "elf32-i386" | |
5008 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 5009 | #define ELF_TARGET_ID I386_ELF_DATA |
252b5132 RH |
5010 | #define ELF_MACHINE_CODE EM_386 |
5011 | #define ELF_MAXPAGESIZE 0x1000 | |
252b5132 RH |
5012 | |
5013 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 5014 | #define elf_backend_can_refcount 1 |
252b5132 RH |
5015 | #define elf_backend_want_got_plt 1 |
5016 | #define elf_backend_plt_readonly 1 | |
5017 | #define elf_backend_want_plt_sym 0 | |
5018 | #define elf_backend_got_header_size 12 | |
e41b3a13 | 5019 | #define elf_backend_plt_alignment 4 |
252b5132 | 5020 | |
8c29f035 AM |
5021 | /* Support RELA for objdump of prelink objects. */ |
5022 | #define elf_info_to_howto elf_i386_info_to_howto_rel | |
dd5724d5 AM |
5023 | #define elf_info_to_howto_rel elf_i386_info_to_howto_rel |
5024 | ||
13ae64f3 | 5025 | #define bfd_elf32_mkobject elf_i386_mkobject |
13ae64f3 | 5026 | |
dd5724d5 AM |
5027 | #define bfd_elf32_bfd_is_local_label_name elf_i386_is_local_label_name |
5028 | #define bfd_elf32_bfd_link_hash_table_create elf_i386_link_hash_table_create | |
c25bc9fc | 5029 | #define bfd_elf32_bfd_link_hash_table_free elf_i386_link_hash_table_free |
dd5724d5 | 5030 | #define bfd_elf32_bfd_reloc_type_lookup elf_i386_reloc_type_lookup |
13285a1b | 5031 | #define bfd_elf32_bfd_reloc_name_lookup elf_i386_reloc_name_lookup |
dd5724d5 AM |
5032 | |
5033 | #define elf_backend_adjust_dynamic_symbol elf_i386_adjust_dynamic_symbol | |
13285a1b | 5034 | #define elf_backend_relocs_compatible _bfd_elf_relocs_compatible |
dd5724d5 | 5035 | #define elf_backend_check_relocs elf_i386_check_relocs |
0ac8d2ca | 5036 | #define elf_backend_copy_indirect_symbol elf_i386_copy_indirect_symbol |
6725bdbf | 5037 | #define elf_backend_create_dynamic_sections elf_i386_create_dynamic_sections |
0ac8d2ca | 5038 | #define elf_backend_fake_sections elf_i386_fake_sections |
dd5724d5 AM |
5039 | #define elf_backend_finish_dynamic_sections elf_i386_finish_dynamic_sections |
5040 | #define elf_backend_finish_dynamic_symbol elf_i386_finish_dynamic_symbol | |
5041 | #define elf_backend_gc_mark_hook elf_i386_gc_mark_hook | |
5042 | #define elf_backend_gc_sweep_hook elf_i386_gc_sweep_hook | |
c5fccbec DJ |
5043 | #define elf_backend_grok_prstatus elf_i386_grok_prstatus |
5044 | #define elf_backend_grok_psinfo elf_i386_grok_psinfo | |
db6751f2 | 5045 | #define elf_backend_reloc_type_class elf_i386_reloc_type_class |
0ac8d2ca AM |
5046 | #define elf_backend_relocate_section elf_i386_relocate_section |
5047 | #define elf_backend_size_dynamic_sections elf_i386_size_dynamic_sections | |
67a4f2b7 | 5048 | #define elf_backend_always_size_sections elf_i386_always_size_sections |
74541ad4 AM |
5049 | #define elf_backend_omit_section_dynsym \ |
5050 | ((bfd_boolean (*) (bfd *, struct bfd_link_info *, asection *)) bfd_true) | |
4c45e5c9 | 5051 | #define elf_backend_plt_sym_val elf_i386_plt_sym_val |
fdc90cb4 | 5052 | #define elf_backend_hash_symbol elf_i386_hash_symbol |
d8045f23 NC |
5053 | #define elf_backend_add_symbol_hook elf_i386_add_symbol_hook |
5054 | #undef elf_backend_post_process_headers | |
5055 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
dd5724d5 | 5056 | |
252b5132 | 5057 | #include "elf32-target.h" |
2bc3c89a AM |
5058 | |
5059 | /* FreeBSD support. */ | |
5060 | ||
5061 | #undef TARGET_LITTLE_SYM | |
5062 | #define TARGET_LITTLE_SYM bfd_elf32_i386_freebsd_vec | |
5063 | #undef TARGET_LITTLE_NAME | |
5064 | #define TARGET_LITTLE_NAME "elf32-i386-freebsd" | |
d1036acb L |
5065 | #undef ELF_OSABI |
5066 | #define ELF_OSABI ELFOSABI_FREEBSD | |
2bc3c89a AM |
5067 | |
5068 | /* The kernel recognizes executables as valid only if they carry a | |
5069 | "FreeBSD" label in the ELF header. So we put this label on all | |
5070 | executables and (for simplicity) also all other object files. */ | |
5071 | ||
2bc3c89a | 5072 | static void |
d8045f23 | 5073 | elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info) |
2bc3c89a | 5074 | { |
d8045f23 | 5075 | _bfd_elf_set_osabi (abfd, info); |
2bc3c89a | 5076 | |
2bc3c89a AM |
5077 | #ifdef OLD_FREEBSD_ABI_LABEL |
5078 | /* The ABI label supported by FreeBSD <= 4.0 is quite nonstandard. */ | |
5079 | memcpy (&i_ehdrp->e_ident[EI_ABIVERSION], "FreeBSD", 8); | |
caf47ea6 | 5080 | #endif |
2bc3c89a AM |
5081 | } |
5082 | ||
5083 | #undef elf_backend_post_process_headers | |
d8045f23 | 5084 | #define elf_backend_post_process_headers elf_i386_fbsd_post_process_headers |
571fe01f NC |
5085 | #undef elf32_bed |
5086 | #define elf32_bed elf32_i386_fbsd_bed | |
2bc3c89a | 5087 | |
d8045f23 NC |
5088 | #undef elf_backend_add_symbol_hook |
5089 | ||
2bc3c89a | 5090 | #include "elf32-target.h" |
eac338cf | 5091 | |
a6cc6b3b RO |
5092 | /* Solaris 2. */ |
5093 | ||
5094 | #undef TARGET_LITTLE_SYM | |
5095 | #define TARGET_LITTLE_SYM bfd_elf32_i386_sol2_vec | |
5096 | #undef TARGET_LITTLE_NAME | |
5097 | #define TARGET_LITTLE_NAME "elf32-i386-sol2" | |
5098 | ||
5099 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
5100 | objects won't be recognized. */ | |
5101 | #undef ELF_OSABI | |
5102 | ||
5103 | #undef elf32_bed | |
5104 | #define elf32_bed elf32_i386_sol2_bed | |
5105 | ||
7dc98aea RO |
5106 | /* The 32-bit static TLS arena size is rounded to the nearest 8-byte |
5107 | boundary. */ | |
5108 | #undef elf_backend_static_tls_alignment | |
5109 | #define elf_backend_static_tls_alignment 8 | |
5110 | ||
a6cc6b3b RO |
5111 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
5112 | ||
5113 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
5114 | File, p.63. */ | |
5115 | #undef elf_backend_want_plt_sym | |
5116 | #define elf_backend_want_plt_sym 1 | |
5117 | ||
5118 | #include "elf32-target.h" | |
5119 | ||
a27e4371 RM |
5120 | /* Native Client support. */ |
5121 | ||
5122 | #undef TARGET_LITTLE_SYM | |
5123 | #define TARGET_LITTLE_SYM bfd_elf32_i386_nacl_vec | |
5124 | #undef TARGET_LITTLE_NAME | |
5125 | #define TARGET_LITTLE_NAME "elf32-i386-nacl" | |
5126 | #undef elf32_bed | |
5127 | #define elf32_bed elf32_i386_nacl_bed | |
5128 | ||
5129 | #undef ELF_MAXPAGESIZE | |
5130 | #define ELF_MAXPAGESIZE 0x10000 | |
5131 | ||
5132 | /* Restore defaults. */ | |
5133 | #undef ELF_OSABI | |
5134 | #undef elf_backend_want_plt_sym | |
5135 | #define elf_backend_want_plt_sym 0 | |
5136 | #undef elf_backend_post_process_headers | |
5137 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
5138 | #undef elf_backend_static_tls_alignment | |
5139 | ||
5140 | /* NaCl uses substantially different PLT entries for the same effects. */ | |
5141 | ||
5142 | #undef elf_backend_plt_alignment | |
5143 | #define elf_backend_plt_alignment 5 | |
5144 | #define NACL_PLT_ENTRY_SIZE 64 | |
5145 | #define NACLMASK 0xe0 /* 32-byte alignment mask. */ | |
5146 | ||
5147 | static const bfd_byte elf_i386_nacl_plt0_entry[] = | |
5148 | { | |
5149 | 0xff, 0x35, /* pushl contents of address */ | |
5150 | 0, 0, 0, 0, /* replaced with address of .got + 4. */ | |
5151 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5152 | 0, 0, 0, 0, /* replaced with address of .got + 8. */ | |
5153 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5154 | 0xff, 0xe1 /* jmp *%ecx */ | |
5155 | }; | |
5156 | ||
5157 | static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5158 | { | |
5159 | 0x8b, 0x0d, /* movl contents of address, %ecx */ | |
5160 | 0, 0, 0, 0, /* replaced with GOT slot address. */ | |
5161 | 0x83, 0xe1, NACLMASK, /* andl $NACLMASK, %ecx */ | |
5162 | 0xff, 0xe1, /* jmp *%ecx */ | |
5163 | ||
5164 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5165 | 0x90, | |
5166 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5167 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5168 | ||
5169 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5170 | 0x68, /* pushl immediate */ | |
5171 | 0, 0, 0, 0, /* replaced with reloc offset. */ | |
5172 | 0xe9, /* jmp relative */ | |
5173 | 0, 0, 0, 0, /* replaced with offset to .plt. */ | |
5174 | ||
5175 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5176 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5177 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5178 | 0x90, 0x90 | |
5179 | }; | |
5180 | ||
5181 | static const bfd_byte | |
5182 | elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] = | |
5183 | { | |
5184 | 0xff, 0x73, 0x04, /* pushl 4(%ebx) */ | |
5185 | 0x8b, 0x4b, 0x08, /* mov 0x8(%ebx), %ecx */ | |
5186 | 0x83, 0xe1, 0xe0, /* and $NACLMASK, %ecx */ | |
5187 | 0xff, 0xe1, /* jmp *%ecx */ | |
caa0075c RM |
5188 | |
5189 | /* This is expected to be the same size as elf_i386_nacl_plt0_entry, | |
5190 | so pad to that size with nop instructions. */ | |
5191 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90 | |
a27e4371 RM |
5192 | }; |
5193 | ||
5194 | static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] = | |
5195 | { | |
5196 | 0x8b, 0x8b, /* movl offset(%ebx), %ecx */ | |
5197 | 0, 0, 0, 0, /* replaced with offset of this symbol in .got. */ | |
5198 | 0x83, 0xe1, 0xe0, /* andl $NACLMASK, %ecx */ | |
5199 | 0xff, 0xe1, /* jmp *%ecx */ | |
5200 | ||
5201 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5202 | 0x90, | |
5203 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5204 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5205 | ||
5206 | /* Lazy GOT entries point here (32-byte aligned). */ | |
5207 | 0x68, /* pushl immediate */ | |
5208 | 0, 0, 0, 0, /* replaced with offset into relocation table. */ | |
5209 | 0xe9, /* jmp relative */ | |
5210 | 0, 0, 0, 0, /* replaced with offset to start of .plt. */ | |
5211 | ||
5212 | /* Pad to the next 32-byte boundary with nop instructions. */ | |
5213 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5214 | 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, | |
5215 | 0x90, 0x90 | |
5216 | }; | |
5217 | ||
5218 | static const bfd_byte elf_i386_nacl_eh_frame_plt[] = | |
5219 | { | |
5220 | #if (PLT_CIE_LENGTH != 20 \ | |
5221 | || PLT_FDE_LENGTH != 36 \ | |
5222 | || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8 \ | |
5223 | || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12) | |
5224 | # error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!" | |
5225 | #endif | |
5226 | PLT_CIE_LENGTH, 0, 0, 0, /* CIE length */ | |
5227 | 0, 0, 0, 0, /* CIE ID */ | |
5228 | 1, /* CIE version */ | |
5229 | 'z', 'R', 0, /* Augmentation string */ | |
5230 | 1, /* Code alignment factor */ | |
5231 | 0x7c, /* Data alignment factor: -4 */ | |
5232 | 8, /* Return address column */ | |
5233 | 1, /* Augmentation size */ | |
5234 | DW_EH_PE_pcrel | DW_EH_PE_sdata4, /* FDE encoding */ | |
5235 | DW_CFA_def_cfa, 4, 4, /* DW_CFA_def_cfa: r4 (esp) ofs 4 */ | |
5236 | DW_CFA_offset + 8, 1, /* DW_CFA_offset: r8 (eip) at cfa-4 */ | |
5237 | DW_CFA_nop, DW_CFA_nop, | |
5238 | ||
5239 | PLT_FDE_LENGTH, 0, 0, 0, /* FDE length */ | |
5240 | PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */ | |
5241 | 0, 0, 0, 0, /* R_386_PC32 .plt goes here */ | |
5242 | 0, 0, 0, 0, /* .plt size goes here */ | |
5243 | 0, /* Augmentation size */ | |
5244 | DW_CFA_def_cfa_offset, 8, /* DW_CFA_def_cfa_offset: 8 */ | |
5245 | DW_CFA_advance_loc + 6, /* DW_CFA_advance_loc: 6 to __PLT__+6 */ | |
5246 | DW_CFA_def_cfa_offset, 12, /* DW_CFA_def_cfa_offset: 12 */ | |
5247 | DW_CFA_advance_loc + 58, /* DW_CFA_advance_loc: 58 to __PLT__+64 */ | |
5248 | DW_CFA_def_cfa_expression, /* DW_CFA_def_cfa_expression */ | |
5249 | 13, /* Block length */ | |
5250 | DW_OP_breg4, 4, /* DW_OP_breg4 (esp): 4 */ | |
5251 | DW_OP_breg8, 0, /* DW_OP_breg8 (eip): 0 */ | |
5252 | DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge, | |
5253 | DW_OP_lit2, DW_OP_shl, DW_OP_plus, | |
5254 | DW_CFA_nop, DW_CFA_nop | |
5255 | }; | |
5256 | ||
5257 | static const struct elf_i386_plt_layout elf_i386_nacl_plt = | |
5258 | { | |
5259 | elf_i386_nacl_plt0_entry, /* plt0_entry */ | |
5260 | sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */ | |
5261 | 2, /* plt0_got1_offset */ | |
5262 | 8, /* plt0_got2_offset */ | |
5263 | elf_i386_nacl_plt_entry, /* plt_entry */ | |
5264 | NACL_PLT_ENTRY_SIZE, /* plt_entry_size */ | |
5265 | 2, /* plt_got_offset */ | |
5266 | 33, /* plt_reloc_offset */ | |
5267 | 38, /* plt_plt_offset */ | |
5268 | 32, /* plt_lazy_offset */ | |
5269 | elf_i386_nacl_pic_plt0_entry, /* pic_plt0_entry */ | |
5270 | elf_i386_nacl_pic_plt_entry, /* pic_plt_entry */ | |
5271 | elf_i386_nacl_eh_frame_plt, /* eh_frame_plt */ | |
5272 | sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */ | |
5273 | }; | |
5274 | ||
5275 | static const struct elf_i386_backend_data elf_i386_nacl_arch_bed = | |
5276 | { | |
5277 | &elf_i386_nacl_plt, /* plt */ | |
5278 | 0x90, /* plt0_pad_byte: nop insn */ | |
5279 | 0, /* is_vxworks */ | |
5280 | }; | |
5281 | ||
5282 | #undef elf_backend_arch_data | |
5283 | #define elf_backend_arch_data &elf_i386_nacl_arch_bed | |
5284 | ||
5a68afcf RM |
5285 | #undef elf_backend_modify_segment_map |
5286 | #define elf_backend_modify_segment_map nacl_modify_segment_map | |
5287 | #undef elf_backend_modify_program_headers | |
5288 | #define elf_backend_modify_program_headers nacl_modify_program_headers | |
5289 | ||
a27e4371 RM |
5290 | #include "elf32-target.h" |
5291 | ||
5a68afcf RM |
5292 | /* Restore defaults. */ |
5293 | #undef elf_backend_modify_segment_map | |
5294 | #undef elf_backend_modify_program_headers | |
5295 | ||
eac338cf PB |
5296 | /* VxWorks support. */ |
5297 | ||
5298 | #undef TARGET_LITTLE_SYM | |
5299 | #define TARGET_LITTLE_SYM bfd_elf32_i386_vxworks_vec | |
5300 | #undef TARGET_LITTLE_NAME | |
5301 | #define TARGET_LITTLE_NAME "elf32-i386-vxworks" | |
d1036acb | 5302 | #undef ELF_OSABI |
a27e4371 RM |
5303 | #undef elf_backend_plt_alignment |
5304 | #define elf_backend_plt_alignment 4 | |
eac338cf | 5305 | |
23209a78 RM |
5306 | static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed = |
5307 | { | |
25e762b9 | 5308 | &elf_i386_plt, /* plt */ |
23209a78 RM |
5309 | 0x90, /* plt0_pad_byte */ |
5310 | 1, /* is_vxworks */ | |
5311 | }; | |
eac338cf | 5312 | |
23209a78 RM |
5313 | #undef elf_backend_arch_data |
5314 | #define elf_backend_arch_data &elf_i386_vxworks_arch_bed | |
eac338cf | 5315 | |
13285a1b AM |
5316 | #undef elf_backend_relocs_compatible |
5317 | #undef elf_backend_post_process_headers | |
eac338cf PB |
5318 | #undef elf_backend_add_symbol_hook |
5319 | #define elf_backend_add_symbol_hook \ | |
5320 | elf_vxworks_add_symbol_hook | |
5321 | #undef elf_backend_link_output_symbol_hook | |
5322 | #define elf_backend_link_output_symbol_hook \ | |
9c72ff84 | 5323 | elf_vxworks_link_output_symbol_hook |
eac338cf PB |
5324 | #undef elf_backend_emit_relocs |
5325 | #define elf_backend_emit_relocs elf_vxworks_emit_relocs | |
5326 | #undef elf_backend_final_write_processing | |
5327 | #define elf_backend_final_write_processing \ | |
5328 | elf_vxworks_final_write_processing | |
7dc98aea | 5329 | #undef elf_backend_static_tls_alignment |
eac338cf PB |
5330 | |
5331 | /* On VxWorks, we emit relocations against _PROCEDURE_LINKAGE_TABLE_, so | |
5332 | define it. */ | |
5333 | #undef elf_backend_want_plt_sym | |
5334 | #define elf_backend_want_plt_sym 1 | |
5335 | ||
5336 | #undef elf32_bed | |
5337 | #define elf32_bed elf32_i386_vxworks_bed | |
5338 | ||
5339 | #include "elf32-target.h" |