Commit | Line | Data |
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351f65ca | 1 | /* X86-64 specific support for ELF |
4dfe6ac6 | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, |
9f973f28 L |
3 | 2010, 2011 |
4 | Free Software Foundation, Inc. | |
8d88c4ca NC |
5 | Contributed by Jan Hubicka <jh@suse.cz>. |
6 | ||
ae9a127f | 7 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 8 | |
ae9a127f NC |
9 | This program is free software; you can redistribute it and/or modify |
10 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 11 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 12 | (at your option) any later version. |
8d88c4ca | 13 | |
ae9a127f NC |
14 | This program is distributed in the hope that it will be useful, |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
8d88c4ca | 18 | |
ae9a127f NC |
19 | You should have received a copy of the GNU General Public License |
20 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
21 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
22 | MA 02110-1301, USA. */ | |
8d88c4ca | 23 | |
8d88c4ca | 24 | #include "sysdep.h" |
3db64b00 | 25 | #include "bfd.h" |
c434dee6 | 26 | #include "bfdlink.h" |
8d88c4ca NC |
27 | #include "libbfd.h" |
28 | #include "elf-bfd.h" | |
142411ca | 29 | #include "bfd_stdint.h" |
c25bc9fc L |
30 | #include "objalloc.h" |
31 | #include "hashtab.h" | |
8d88c4ca NC |
32 | |
33 | #include "elf/x86-64.h" | |
34 | ||
8d88c4ca NC |
35 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
36 | #define MINUS_ONE (~ (bfd_vma) 0) | |
37 | ||
351f65ca L |
38 | /* Since both 32-bit and 64-bit x86-64 encode relocation type in the |
39 | identical manner, we use ELF32_R_TYPE instead of ELF64_R_TYPE to get | |
40 | relocation type. We also use ELF_ST_TYPE instead of ELF64_ST_TYPE | |
41 | since they are the same. */ | |
42 | ||
43 | #define ABI_64_P(abfd) \ | |
44 | (get_elf_backend_data (abfd)->s->elfclass == ELFCLASS64) | |
45 | ||
8d88c4ca | 46 | /* The relocation "howto" table. Order of fields: |
7b81dfbb AJ |
47 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
48 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
49 | static reloc_howto_type x86_64_elf_howto_table[] = |
50 | { | |
b34976b6 AM |
51 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
52 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
53 | FALSE), | |
54 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
55 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
56 | FALSE), | |
57 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
58 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
59 | TRUE), | |
60 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
61 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
62 | FALSE), | |
63 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
64 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
65 | TRUE), | |
66 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
67 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
68 | FALSE), | |
69 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
70 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
71 | MINUS_ONE, FALSE), | |
72 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
73 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
74 | MINUS_ONE, FALSE), | |
75 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
76 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
77 | MINUS_ONE, FALSE), | |
78 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
79 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
80 | 0xffffffff, TRUE), | |
81 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
82 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
83 | FALSE), | |
84 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
85 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
86 | FALSE), | |
87 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
88 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 89 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 90 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 91 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
92 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
93 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
94 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
95 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
96 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
97 | MINUS_ONE, FALSE), | |
98 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
99 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
100 | MINUS_ONE, FALSE), | |
101 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
102 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
103 | MINUS_ONE, FALSE), | |
104 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
106 | 0xffffffff, TRUE), | |
107 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
108 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
109 | 0xffffffff, TRUE), | |
ac2aa337 | 110 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
111 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
112 | 0xffffffff, FALSE), | |
113 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
115 | 0xffffffff, TRUE), | |
116 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
117 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
118 | 0xffffffff, FALSE), | |
d6ab8113 JB |
119 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
120 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
121 | TRUE), | |
122 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
124 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
125 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
126 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
127 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
128 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
129 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
130 | FALSE), | |
131 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
132 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
133 | MINUS_ONE, TRUE), | |
134 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
135 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
136 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
137 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
138 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
139 | MINUS_ONE, FALSE), | |
140 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
141 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
142 | MINUS_ONE, FALSE), | |
67a4f2b7 AO |
143 | EMPTY_HOWTO (32), |
144 | EMPTY_HOWTO (33), | |
145 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, | |
146 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
147 | "R_X86_64_GOTPC32_TLSDESC", | |
148 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
149 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
150 | complain_overflow_dont, bfd_elf_generic_reloc, | |
151 | "R_X86_64_TLSDESC_CALL", | |
152 | FALSE, 0, 0, FALSE), | |
153 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
154 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
155 | "R_X86_64_TLSDESC", | |
156 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
cbe950e9 L |
157 | HOWTO(R_X86_64_IRELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, |
158 | bfd_elf_generic_reloc, "R_X86_64_IRELATIVE", FALSE, MINUS_ONE, | |
159 | MINUS_ONE, FALSE), | |
fe4770f4 | 160 | |
a33d77bc JB |
161 | /* We have a gap in the reloc numbers here. |
162 | R_X86_64_standard counts the number up to this point, and | |
163 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
164 | R_X86_64_GNU_VT* to form an index into this table. */ | |
cbe950e9 | 165 | #define R_X86_64_standard (R_X86_64_IRELATIVE + 1) |
a33d77bc JB |
166 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
167 | ||
fe4770f4 | 168 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
169 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
170 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
171 | |
172 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
173 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
174 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
175 | FALSE) | |
8d88c4ca NC |
176 | }; |
177 | ||
d8045f23 NC |
178 | #define IS_X86_64_PCREL_TYPE(TYPE) \ |
179 | ( ((TYPE) == R_X86_64_PC8) \ | |
180 | || ((TYPE) == R_X86_64_PC16) \ | |
181 | || ((TYPE) == R_X86_64_PC32) \ | |
182 | || ((TYPE) == R_X86_64_PC64)) | |
183 | ||
8d88c4ca | 184 | /* Map BFD relocs to the x86_64 elf relocs. */ |
70256ad8 AJ |
185 | struct elf_reloc_map |
186 | { | |
8d88c4ca NC |
187 | bfd_reloc_code_real_type bfd_reloc_val; |
188 | unsigned char elf_reloc_val; | |
189 | }; | |
190 | ||
dc810e39 | 191 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 192 | { |
70256ad8 AJ |
193 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
194 | { BFD_RELOC_64, R_X86_64_64, }, | |
195 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
196 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
197 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
198 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
199 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
200 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
201 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
202 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
203 | { BFD_RELOC_32, R_X86_64_32, }, | |
204 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
205 | { BFD_RELOC_16, R_X86_64_16, }, | |
206 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
207 | { BFD_RELOC_8, R_X86_64_8, }, | |
208 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
209 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
210 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
211 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
212 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
213 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
214 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
215 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
216 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
217 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
218 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
219 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
220 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
221 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
222 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
223 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
224 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
67a4f2b7 AO |
225 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
226 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
227 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
cbe950e9 | 228 | { BFD_RELOC_X86_64_IRELATIVE, R_X86_64_IRELATIVE, }, |
fe4770f4 AJ |
229 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
230 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
231 | }; |
232 | ||
67a4f2b7 | 233 | static reloc_howto_type * |
351f65ca | 234 | elf_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) |
67a4f2b7 AO |
235 | { |
236 | unsigned i; | |
237 | ||
238 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
239 | || r_type >= (unsigned int) R_X86_64_max) | |
240 | { | |
241 | if (r_type >= (unsigned int) R_X86_64_standard) | |
242 | { | |
243 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
244 | abfd, (int) r_type); | |
245 | r_type = R_X86_64_NONE; | |
246 | } | |
247 | i = r_type; | |
248 | } | |
249 | else | |
250 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
251 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
252 | return &x86_64_elf_howto_table[i]; | |
253 | } | |
8d88c4ca NC |
254 | |
255 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
256 | static reloc_howto_type * | |
351f65ca L |
257 | elf_x86_64_reloc_type_lookup (bfd *abfd, |
258 | bfd_reloc_code_real_type code) | |
8d88c4ca NC |
259 | { |
260 | unsigned int i; | |
27482721 | 261 | |
8d88c4ca NC |
262 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
263 | i++) | |
264 | { | |
265 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
351f65ca L |
266 | return elf_x86_64_rtype_to_howto (abfd, |
267 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
268 | } |
269 | return 0; | |
270 | } | |
271 | ||
157090f7 | 272 | static reloc_howto_type * |
351f65ca L |
273 | elf_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, |
274 | const char *r_name) | |
157090f7 AM |
275 | { |
276 | unsigned int i; | |
277 | ||
278 | for (i = 0; | |
279 | i < (sizeof (x86_64_elf_howto_table) | |
280 | / sizeof (x86_64_elf_howto_table[0])); | |
281 | i++) | |
282 | if (x86_64_elf_howto_table[i].name != NULL | |
283 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
284 | return &x86_64_elf_howto_table[i]; | |
285 | ||
286 | return NULL; | |
287 | } | |
288 | ||
8d88c4ca | 289 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 290 | |
8d88c4ca | 291 | static void |
351f65ca L |
292 | elf_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
293 | Elf_Internal_Rela *dst) | |
8d88c4ca | 294 | { |
67a4f2b7 | 295 | unsigned r_type; |
8d88c4ca | 296 | |
351f65ca L |
297 | r_type = ELF32_R_TYPE (dst->r_info); |
298 | cache_ptr->howto = elf_x86_64_rtype_to_howto (abfd, r_type); | |
8d88c4ca NC |
299 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
300 | } | |
70256ad8 | 301 | \f |
3bab7989 | 302 | /* Support for core dump NOTE sections. */ |
b34976b6 | 303 | static bfd_boolean |
351f65ca | 304 | elf_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
305 | { |
306 | int offset; | |
eea6121a | 307 | size_t size; |
3bab7989 ML |
308 | |
309 | switch (note->descsz) | |
310 | { | |
311 | default: | |
b34976b6 | 312 | return FALSE; |
3bab7989 ML |
313 | |
314 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
315 | /* pr_cursig */ | |
cedb70c5 | 316 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
317 | = bfd_get_16 (abfd, note->descdata + 12); |
318 | ||
319 | /* pr_pid */ | |
261b8d08 | 320 | elf_tdata (abfd)->core_lwpid |
3bab7989 ML |
321 | = bfd_get_32 (abfd, note->descdata + 32); |
322 | ||
323 | /* pr_reg */ | |
324 | offset = 112; | |
eea6121a | 325 | size = 216; |
3bab7989 ML |
326 | |
327 | break; | |
328 | } | |
329 | ||
330 | /* Make a ".reg/999" section. */ | |
331 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 332 | size, note->descpos + offset); |
3bab7989 ML |
333 | } |
334 | ||
b34976b6 | 335 | static bfd_boolean |
351f65ca | 336 | elf_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
337 | { |
338 | switch (note->descsz) | |
339 | { | |
340 | default: | |
b34976b6 | 341 | return FALSE; |
3bab7989 ML |
342 | |
343 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
261b8d08 PA |
344 | elf_tdata (abfd)->core_pid |
345 | = bfd_get_32 (abfd, note->descdata + 24); | |
3bab7989 ML |
346 | elf_tdata (abfd)->core_program |
347 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
348 | elf_tdata (abfd)->core_command | |
349 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
350 | } | |
351 | ||
352 | /* Note that for some reason, a spurious space is tacked | |
353 | onto the end of the args in some (at least one anyway) | |
354 | implementations, so strip it off if it exists. */ | |
355 | ||
356 | { | |
357 | char *command = elf_tdata (abfd)->core_command; | |
358 | int n = strlen (command); | |
359 | ||
360 | if (0 < n && command[n - 1] == ' ') | |
361 | command[n - 1] = '\0'; | |
362 | } | |
363 | ||
b34976b6 | 364 | return TRUE; |
3bab7989 ML |
365 | } |
366 | \f | |
407443a3 | 367 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 368 | |
407443a3 | 369 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
370 | section. */ |
371 | ||
351f65ca L |
372 | #define ELF64_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
373 | #define ELF32_DYNAMIC_INTERPRETER "/lib/ld32.so.1" | |
70256ad8 | 374 | |
d40d037c AJ |
375 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
376 | copying dynamic variables from a shared lib into an app's dynbss | |
377 | section, and instead use a dynamic relocation to point into the | |
378 | shared lib. */ | |
379 | #define ELIMINATE_COPY_RELOCS 1 | |
380 | ||
70256ad8 AJ |
381 | /* The size in bytes of an entry in the global offset table. */ |
382 | ||
383 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 384 | |
70256ad8 | 385 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 386 | |
70256ad8 AJ |
387 | #define PLT_ENTRY_SIZE 16 |
388 | ||
389 | /* The first entry in a procedure linkage table looks like this. See the | |
390 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
391 | ||
351f65ca | 392 | static const bfd_byte elf_x86_64_plt0_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 393 | { |
653165cc AJ |
394 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
395 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 396 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
397 | }; |
398 | ||
399 | /* Subsequent entries in a procedure linkage table look like this. */ | |
400 | ||
351f65ca | 401 | static const bfd_byte elf_x86_64_plt_entry[PLT_ENTRY_SIZE] = |
70256ad8 | 402 | { |
653165cc | 403 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 404 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 405 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
406 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
407 | 0xe9, /* jmp relative */ | |
408 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
409 | }; | |
410 | ||
70256ad8 AJ |
411 | /* x86-64 ELF linker hash entry. */ |
412 | ||
351f65ca | 413 | struct elf_x86_64_link_hash_entry |
70256ad8 | 414 | { |
c434dee6 | 415 | struct elf_link_hash_entry elf; |
70256ad8 | 416 | |
c434dee6 | 417 | /* Track dynamic relocs copied for this symbol. */ |
e03a8ed8 | 418 | struct elf_dyn_relocs *dyn_relocs; |
bffbf940 JJ |
419 | |
420 | #define GOT_UNKNOWN 0 | |
421 | #define GOT_NORMAL 1 | |
422 | #define GOT_TLS_GD 2 | |
423 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
424 | #define GOT_TLS_GDESC 4 |
425 | #define GOT_TLS_GD_BOTH_P(type) \ | |
426 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
427 | #define GOT_TLS_GD_P(type) \ | |
428 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
429 | #define GOT_TLS_GDESC_P(type) \ | |
430 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
431 | #define GOT_TLS_GD_ANY_P(type) \ | |
432 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 433 | unsigned char tls_type; |
67a4f2b7 AO |
434 | |
435 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
436 | starting at the end of the jump table. */ | |
437 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
438 | }; |
439 | ||
351f65ca L |
440 | #define elf_x86_64_hash_entry(ent) \ |
441 | ((struct elf_x86_64_link_hash_entry *)(ent)) | |
bffbf940 | 442 | |
351f65ca | 443 | struct elf_x86_64_obj_tdata |
bffbf940 JJ |
444 | { |
445 | struct elf_obj_tdata root; | |
446 | ||
447 | /* tls_type for each local got entry. */ | |
448 | char *local_got_tls_type; | |
67a4f2b7 AO |
449 | |
450 | /* GOTPLT entries for TLS descriptors. */ | |
451 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
452 | }; |
453 | ||
351f65ca L |
454 | #define elf_x86_64_tdata(abfd) \ |
455 | ((struct elf_x86_64_obj_tdata *) (abfd)->tdata.any) | |
bffbf940 | 456 | |
351f65ca L |
457 | #define elf_x86_64_local_got_tls_type(abfd) \ |
458 | (elf_x86_64_tdata (abfd)->local_got_tls_type) | |
bffbf940 | 459 | |
351f65ca L |
460 | #define elf_x86_64_local_tlsdesc_gotent(abfd) \ |
461 | (elf_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 462 | |
0ffa91dd NC |
463 | #define is_x86_64_elf(bfd) \ |
464 | (bfd_get_flavour (bfd) == bfd_target_elf_flavour \ | |
465 | && elf_tdata (bfd) != NULL \ | |
4dfe6ac6 | 466 | && elf_object_id (bfd) == X86_64_ELF_DATA) |
0ffa91dd NC |
467 | |
468 | static bfd_boolean | |
351f65ca | 469 | elf_x86_64_mkobject (bfd *abfd) |
0ffa91dd | 470 | { |
351f65ca | 471 | return bfd_elf_allocate_object (abfd, sizeof (struct elf_x86_64_obj_tdata), |
4dfe6ac6 | 472 | X86_64_ELF_DATA); |
0ffa91dd NC |
473 | } |
474 | ||
c434dee6 | 475 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 476 | |
351f65ca | 477 | struct elf_x86_64_link_hash_table |
407443a3 | 478 | { |
c434dee6 | 479 | struct elf_link_hash_table elf; |
70256ad8 | 480 | |
c434dee6 | 481 | /* Short-cuts to get to dynamic linker sections. */ |
c434dee6 AJ |
482 | asection *sdynbss; |
483 | asection *srelbss; | |
70256ad8 | 484 | |
4dfe6ac6 NC |
485 | union |
486 | { | |
bffbf940 JJ |
487 | bfd_signed_vma refcount; |
488 | bfd_vma offset; | |
489 | } tls_ld_got; | |
490 | ||
67a4f2b7 AO |
491 | /* The amount of space used by the jump slots in the GOT. */ |
492 | bfd_vma sgotplt_jump_table_size; | |
493 | ||
87d72d41 AM |
494 | /* Small local sym cache. */ |
495 | struct sym_cache sym_cache; | |
9f03412a | 496 | |
351f65ca L |
497 | bfd_vma (*r_info) (bfd_vma, bfd_vma); |
498 | bfd_vma (*r_sym) (bfd_vma); | |
248775ba | 499 | unsigned int pointer_r_type; |
351f65ca L |
500 | const char *dynamic_interpreter; |
501 | int dynamic_interpreter_size; | |
502 | ||
9f03412a AO |
503 | /* _TLS_MODULE_BASE_ symbol. */ |
504 | struct bfd_link_hash_entry *tls_module_base; | |
c25bc9fc L |
505 | |
506 | /* Used by local STT_GNU_IFUNC symbols. */ | |
507 | htab_t loc_hash_table; | |
4dfe6ac6 NC |
508 | void * loc_hash_memory; |
509 | ||
510 | /* The offset into splt of the PLT entry for the TLS descriptor | |
511 | resolver. Special values are 0, if not necessary (or not found | |
512 | to be necessary yet), and -1 if needed but not determined | |
513 | yet. */ | |
514 | bfd_vma tlsdesc_plt; | |
515 | /* The offset into sgot of the GOT entry used by the PLT entry | |
516 | above. */ | |
517 | bfd_vma tlsdesc_got; | |
c434dee6 | 518 | }; |
70256ad8 AJ |
519 | |
520 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca | 521 | |
351f65ca | 522 | #define elf_x86_64_hash_table(p) \ |
4dfe6ac6 | 523 | (elf_hash_table_id ((struct elf_link_hash_table *) ((p)->hash)) \ |
351f65ca | 524 | == X86_64_ELF_DATA ? ((struct elf_x86_64_link_hash_table *) ((p)->hash)) : NULL) |
8d88c4ca | 525 | |
351f65ca | 526 | #define elf_x86_64_compute_jump_table_size(htab) \ |
6de2ae4a | 527 | ((htab)->elf.srelplt->reloc_count * GOT_ENTRY_SIZE) |
67a4f2b7 | 528 | |
407443a3 | 529 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
530 | |
531 | static struct bfd_hash_entry * | |
351f65ca L |
532 | elf_x86_64_link_hash_newfunc (struct bfd_hash_entry *entry, |
533 | struct bfd_hash_table *table, | |
534 | const char *string) | |
70256ad8 | 535 | { |
70256ad8 | 536 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
537 | subclass. */ |
538 | if (entry == NULL) | |
539 | { | |
a50b1753 NC |
540 | entry = (struct bfd_hash_entry *) |
541 | bfd_hash_allocate (table, | |
351f65ca | 542 | sizeof (struct elf_x86_64_link_hash_entry)); |
c434dee6 AJ |
543 | if (entry == NULL) |
544 | return entry; | |
545 | } | |
70256ad8 AJ |
546 | |
547 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
548 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
549 | if (entry != NULL) | |
70256ad8 | 550 | { |
351f65ca | 551 | struct elf_x86_64_link_hash_entry *eh; |
c434dee6 | 552 | |
351f65ca | 553 | eh = (struct elf_x86_64_link_hash_entry *) entry; |
c434dee6 | 554 | eh->dyn_relocs = NULL; |
bffbf940 | 555 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 556 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
557 | } |
558 | ||
c434dee6 | 559 | return entry; |
70256ad8 AJ |
560 | } |
561 | ||
c25bc9fc L |
562 | /* Compute a hash of a local hash entry. We use elf_link_hash_entry |
563 | for local symbol so that we can handle local STT_GNU_IFUNC symbols | |
564 | as global symbol. We reuse indx and dynstr_index for local symbol | |
565 | hash since they aren't used by global symbols in this backend. */ | |
566 | ||
567 | static hashval_t | |
351f65ca | 568 | elf_x86_64_local_htab_hash (const void *ptr) |
c25bc9fc L |
569 | { |
570 | struct elf_link_hash_entry *h | |
571 | = (struct elf_link_hash_entry *) ptr; | |
d2149d72 | 572 | return ELF_LOCAL_SYMBOL_HASH (h->indx, h->dynstr_index); |
c25bc9fc L |
573 | } |
574 | ||
575 | /* Compare local hash entries. */ | |
576 | ||
577 | static int | |
351f65ca | 578 | elf_x86_64_local_htab_eq (const void *ptr1, const void *ptr2) |
c25bc9fc L |
579 | { |
580 | struct elf_link_hash_entry *h1 | |
581 | = (struct elf_link_hash_entry *) ptr1; | |
582 | struct elf_link_hash_entry *h2 | |
583 | = (struct elf_link_hash_entry *) ptr2; | |
584 | ||
585 | return h1->indx == h2->indx && h1->dynstr_index == h2->dynstr_index; | |
586 | } | |
587 | ||
588 | /* Find and/or create a hash entry for local symbol. */ | |
589 | ||
590 | static struct elf_link_hash_entry * | |
351f65ca L |
591 | elf_x86_64_get_local_sym_hash (struct elf_x86_64_link_hash_table *htab, |
592 | bfd *abfd, const Elf_Internal_Rela *rel, | |
593 | bfd_boolean create) | |
c25bc9fc | 594 | { |
351f65ca | 595 | struct elf_x86_64_link_hash_entry e, *ret; |
c25bc9fc | 596 | asection *sec = abfd->sections; |
d2149d72 | 597 | hashval_t h = ELF_LOCAL_SYMBOL_HASH (sec->id, |
351f65ca | 598 | htab->r_sym (rel->r_info)); |
c25bc9fc L |
599 | void **slot; |
600 | ||
601 | e.elf.indx = sec->id; | |
351f65ca | 602 | e.elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc L |
603 | slot = htab_find_slot_with_hash (htab->loc_hash_table, &e, h, |
604 | create ? INSERT : NO_INSERT); | |
605 | ||
606 | if (!slot) | |
607 | return NULL; | |
608 | ||
609 | if (*slot) | |
610 | { | |
351f65ca | 611 | ret = (struct elf_x86_64_link_hash_entry *) *slot; |
c25bc9fc L |
612 | return &ret->elf; |
613 | } | |
614 | ||
351f65ca | 615 | ret = (struct elf_x86_64_link_hash_entry *) |
c25bc9fc | 616 | objalloc_alloc ((struct objalloc *) htab->loc_hash_memory, |
351f65ca | 617 | sizeof (struct elf_x86_64_link_hash_entry)); |
c25bc9fc L |
618 | if (ret) |
619 | { | |
620 | memset (ret, 0, sizeof (*ret)); | |
621 | ret->elf.indx = sec->id; | |
351f65ca | 622 | ret->elf.dynstr_index = htab->r_sym (rel->r_info); |
c25bc9fc | 623 | ret->elf.dynindx = -1; |
c25bc9fc L |
624 | *slot = ret; |
625 | } | |
626 | return &ret->elf; | |
627 | } | |
628 | ||
8d88c4ca NC |
629 | /* Create an X86-64 ELF linker hash table. */ |
630 | ||
631 | static struct bfd_link_hash_table * | |
351f65ca | 632 | elf_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca | 633 | { |
351f65ca L |
634 | struct elf_x86_64_link_hash_table *ret; |
635 | bfd_size_type amt = sizeof (struct elf_x86_64_link_hash_table); | |
8d88c4ca | 636 | |
351f65ca | 637 | ret = (struct elf_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 638 | if (ret == NULL) |
8d88c4ca NC |
639 | return NULL; |
640 | ||
eb4ff4d6 | 641 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, |
351f65ca L |
642 | elf_x86_64_link_hash_newfunc, |
643 | sizeof (struct elf_x86_64_link_hash_entry), | |
4dfe6ac6 | 644 | X86_64_ELF_DATA)) |
8d88c4ca | 645 | { |
e2d34d7d | 646 | free (ret); |
8d88c4ca NC |
647 | return NULL; |
648 | } | |
649 | ||
c434dee6 AJ |
650 | ret->sdynbss = NULL; |
651 | ret->srelbss = NULL; | |
87d72d41 | 652 | ret->sym_cache.abfd = NULL; |
67a4f2b7 AO |
653 | ret->tlsdesc_plt = 0; |
654 | ret->tlsdesc_got = 0; | |
bffbf940 | 655 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 656 | ret->sgotplt_jump_table_size = 0; |
9f03412a | 657 | ret->tls_module_base = NULL; |
6bbec505 | 658 | |
351f65ca L |
659 | if (ABI_64_P (abfd)) |
660 | { | |
661 | ret->r_info = elf64_r_info; | |
662 | ret->r_sym = elf64_r_sym; | |
248775ba | 663 | ret->pointer_r_type = R_X86_64_64; |
351f65ca L |
664 | ret->dynamic_interpreter = ELF64_DYNAMIC_INTERPRETER; |
665 | ret->dynamic_interpreter_size = sizeof ELF64_DYNAMIC_INTERPRETER; | |
666 | } | |
667 | else | |
668 | { | |
669 | ret->r_info = elf32_r_info; | |
670 | ret->r_sym = elf32_r_sym; | |
248775ba | 671 | ret->pointer_r_type = R_X86_64_32; |
351f65ca L |
672 | ret->dynamic_interpreter = ELF32_DYNAMIC_INTERPRETER; |
673 | ret->dynamic_interpreter_size = sizeof ELF32_DYNAMIC_INTERPRETER; | |
674 | } | |
675 | ||
c25bc9fc | 676 | ret->loc_hash_table = htab_try_create (1024, |
351f65ca L |
677 | elf_x86_64_local_htab_hash, |
678 | elf_x86_64_local_htab_eq, | |
c25bc9fc L |
679 | NULL); |
680 | ret->loc_hash_memory = objalloc_create (); | |
681 | if (!ret->loc_hash_table || !ret->loc_hash_memory) | |
682 | { | |
683 | free (ret); | |
684 | return NULL; | |
685 | } | |
686 | ||
c434dee6 AJ |
687 | return &ret->elf.root; |
688 | } | |
689 | ||
c25bc9fc L |
690 | /* Destroy an X86-64 ELF linker hash table. */ |
691 | ||
692 | static void | |
351f65ca | 693 | elf_x86_64_link_hash_table_free (struct bfd_link_hash_table *hash) |
c25bc9fc | 694 | { |
351f65ca L |
695 | struct elf_x86_64_link_hash_table *htab |
696 | = (struct elf_x86_64_link_hash_table *) hash; | |
c25bc9fc L |
697 | |
698 | if (htab->loc_hash_table) | |
699 | htab_delete (htab->loc_hash_table); | |
700 | if (htab->loc_hash_memory) | |
701 | objalloc_free ((struct objalloc *) htab->loc_hash_memory); | |
702 | _bfd_generic_link_hash_table_free (hash); | |
703 | } | |
704 | ||
c434dee6 AJ |
705 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and |
706 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
707 | hash table. */ | |
708 | ||
b34976b6 | 709 | static bfd_boolean |
351f65ca L |
710 | elf_x86_64_create_dynamic_sections (bfd *dynobj, |
711 | struct bfd_link_info *info) | |
c434dee6 | 712 | { |
351f65ca | 713 | struct elf_x86_64_link_hash_table *htab; |
c434dee6 | 714 | |
c434dee6 | 715 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) |
b34976b6 | 716 | return FALSE; |
c434dee6 | 717 | |
351f65ca | 718 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
719 | if (htab == NULL) |
720 | return FALSE; | |
721 | ||
c434dee6 AJ |
722 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); |
723 | if (!info->shared) | |
724 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
725 | ||
6de2ae4a | 726 | if (!htab->sdynbss |
c434dee6 AJ |
727 | || (!info->shared && !htab->srelbss)) |
728 | abort (); | |
729 | ||
b34976b6 | 730 | return TRUE; |
c434dee6 AJ |
731 | } |
732 | ||
733 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
734 | ||
735 | static void | |
351f65ca L |
736 | elf_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
737 | struct elf_link_hash_entry *dir, | |
738 | struct elf_link_hash_entry *ind) | |
c434dee6 | 739 | { |
351f65ca | 740 | struct elf_x86_64_link_hash_entry *edir, *eind; |
c434dee6 | 741 | |
351f65ca L |
742 | edir = (struct elf_x86_64_link_hash_entry *) dir; |
743 | eind = (struct elf_x86_64_link_hash_entry *) ind; | |
c434dee6 AJ |
744 | |
745 | if (eind->dyn_relocs != NULL) | |
746 | { | |
747 | if (edir->dyn_relocs != NULL) | |
748 | { | |
e03a8ed8 L |
749 | struct elf_dyn_relocs **pp; |
750 | struct elf_dyn_relocs *p; | |
c434dee6 | 751 | |
fcfa13d2 | 752 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
753 | list. Merge any entries against the same section. */ |
754 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
755 | { | |
e03a8ed8 | 756 | struct elf_dyn_relocs *q; |
c434dee6 AJ |
757 | |
758 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
759 | if (q->sec == p->sec) | |
760 | { | |
761 | q->pc_count += p->pc_count; | |
762 | q->count += p->count; | |
763 | *pp = p->next; | |
764 | break; | |
765 | } | |
766 | if (q == NULL) | |
767 | pp = &p->next; | |
768 | } | |
769 | *pp = edir->dyn_relocs; | |
770 | } | |
771 | ||
772 | edir->dyn_relocs = eind->dyn_relocs; | |
773 | eind->dyn_relocs = NULL; | |
774 | } | |
775 | ||
bffbf940 JJ |
776 | if (ind->root.type == bfd_link_hash_indirect |
777 | && dir->got.refcount <= 0) | |
778 | { | |
779 | edir->tls_type = eind->tls_type; | |
780 | eind->tls_type = GOT_UNKNOWN; | |
781 | } | |
782 | ||
d40d037c AJ |
783 | if (ELIMINATE_COPY_RELOCS |
784 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
785 | && dir->dynamic_adjusted) |
786 | { | |
787 | /* If called to transfer flags for a weakdef during processing | |
788 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
789 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
790 | dir->ref_dynamic |= ind->ref_dynamic; | |
791 | dir->ref_regular |= ind->ref_regular; | |
792 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
793 | dir->needs_plt |= ind->needs_plt; | |
794 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
795 | } | |
d40d037c | 796 | else |
fcfa13d2 | 797 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
798 | } |
799 | ||
b34976b6 | 800 | static bfd_boolean |
27482721 | 801 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 802 | { |
8d88c4ca NC |
803 | /* Set the right machine number for an x86-64 elf64 file. */ |
804 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 805 | return TRUE; |
8d88c4ca NC |
806 | } |
807 | ||
142411ca L |
808 | typedef union |
809 | { | |
810 | unsigned char c[2]; | |
811 | uint16_t i; | |
812 | } | |
813 | x86_64_opcode16; | |
814 | ||
815 | typedef union | |
816 | { | |
817 | unsigned char c[4]; | |
818 | uint32_t i; | |
819 | } | |
820 | x86_64_opcode32; | |
821 | ||
822 | /* Return TRUE if the TLS access code sequence support transition | |
823 | from R_TYPE. */ | |
824 | ||
825 | static bfd_boolean | |
351f65ca L |
826 | elf_x86_64_check_tls_transition (bfd *abfd, |
827 | struct bfd_link_info *info, | |
828 | asection *sec, | |
829 | bfd_byte *contents, | |
830 | Elf_Internal_Shdr *symtab_hdr, | |
831 | struct elf_link_hash_entry **sym_hashes, | |
832 | unsigned int r_type, | |
833 | const Elf_Internal_Rela *rel, | |
834 | const Elf_Internal_Rela *relend) | |
bffbf940 | 835 | { |
142411ca L |
836 | unsigned int val; |
837 | unsigned long r_symndx; | |
838 | struct elf_link_hash_entry *h; | |
839 | bfd_vma offset; | |
351f65ca | 840 | struct elf_x86_64_link_hash_table *htab; |
142411ca L |
841 | |
842 | /* Get the section contents. */ | |
843 | if (contents == NULL) | |
844 | { | |
845 | if (elf_section_data (sec)->this_hdr.contents != NULL) | |
846 | contents = elf_section_data (sec)->this_hdr.contents; | |
847 | else | |
848 | { | |
849 | /* FIXME: How to better handle error condition? */ | |
850 | if (!bfd_malloc_and_get_section (abfd, sec, &contents)) | |
851 | return FALSE; | |
bffbf940 | 852 | |
142411ca L |
853 | /* Cache the section contents for elf_link_input_bfd. */ |
854 | elf_section_data (sec)->this_hdr.contents = contents; | |
855 | } | |
856 | } | |
857 | ||
351f65ca | 858 | htab = elf_x86_64_hash_table (info); |
142411ca | 859 | offset = rel->r_offset; |
bffbf940 | 860 | switch (r_type) |
142411ca L |
861 | { |
862 | case R_X86_64_TLSGD: | |
863 | case R_X86_64_TLSLD: | |
864 | if ((rel + 1) >= relend) | |
865 | return FALSE; | |
866 | ||
867 | if (r_type == R_X86_64_TLSGD) | |
868 | { | |
52bc799a | 869 | /* Check transition from GD access model. For 64bit, only |
142411ca L |
870 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
871 | .word 0x6666; rex64; call __tls_get_addr | |
52bc799a L |
872 | can transit to different access model. For 32bit, only |
873 | leaq foo@tlsgd(%rip), %rdi | |
874 | .word 0x6666; rex64; call __tls_get_addr | |
142411ca L |
875 | can transit to different access model. */ |
876 | ||
52bc799a L |
877 | static x86_64_opcode32 call = { { 0x66, 0x66, 0x48, 0xe8 } }; |
878 | if ((offset + 12) > sec->size | |
142411ca L |
879 | || bfd_get_32 (abfd, contents + offset + 4) != call.i) |
880 | return FALSE; | |
52bc799a L |
881 | |
882 | if (ABI_64_P (abfd)) | |
883 | { | |
884 | static x86_64_opcode32 leaq = { { 0x66, 0x48, 0x8d, 0x3d } }; | |
885 | if (offset < 4 | |
886 | || bfd_get_32 (abfd, contents + offset - 4) != leaq.i) | |
887 | return FALSE; | |
888 | } | |
889 | else | |
890 | { | |
891 | static x86_64_opcode16 lea = { { 0x8d, 0x3d } }; | |
892 | if (offset < 3 | |
893 | || bfd_get_8 (abfd, contents + offset - 3) != 0x48 | |
894 | || bfd_get_16 (abfd, contents + offset - 2) != lea.i) | |
895 | return FALSE; | |
896 | } | |
142411ca L |
897 | } |
898 | else | |
899 | { | |
900 | /* Check transition from LD access model. Only | |
901 | leaq foo@tlsld(%rip), %rdi; | |
902 | call __tls_get_addr | |
903 | can transit to different access model. */ | |
904 | ||
905 | static x86_64_opcode32 ld = { { 0x48, 0x8d, 0x3d, 0xe8 } }; | |
906 | x86_64_opcode32 op; | |
907 | ||
908 | if (offset < 3 || (offset + 9) > sec->size) | |
909 | return FALSE; | |
910 | ||
911 | op.i = bfd_get_32 (abfd, contents + offset - 3); | |
912 | op.c[3] = bfd_get_8 (abfd, contents + offset + 4); | |
913 | if (op.i != ld.i) | |
914 | return FALSE; | |
915 | } | |
916 | ||
351f65ca | 917 | r_symndx = htab->r_sym (rel[1].r_info); |
142411ca L |
918 | if (r_symndx < symtab_hdr->sh_info) |
919 | return FALSE; | |
920 | ||
921 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
c4fb387b L |
922 | /* Use strncmp to check __tls_get_addr since __tls_get_addr |
923 | may be versioned. */ | |
142411ca L |
924 | return (h != NULL |
925 | && h->root.root.string != NULL | |
351f65ca L |
926 | && (ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PC32 |
927 | || ELF32_R_TYPE (rel[1].r_info) == R_X86_64_PLT32) | |
c4fb387b L |
928 | && (strncmp (h->root.root.string, |
929 | "__tls_get_addr", 14) == 0)); | |
142411ca L |
930 | |
931 | case R_X86_64_GOTTPOFF: | |
932 | /* Check transition from IE access model: | |
4a4c5f25 L |
933 | mov foo@gottpoff(%rip), %reg |
934 | add foo@gottpoff(%rip), %reg | |
142411ca L |
935 | */ |
936 | ||
4a4c5f25 L |
937 | /* Check REX prefix first. */ |
938 | if (offset >= 3 && (offset + 4) <= sec->size) | |
939 | { | |
940 | val = bfd_get_8 (abfd, contents + offset - 3); | |
941 | if (val != 0x48 && val != 0x4c) | |
942 | { | |
943 | /* X32 may have 0x44 REX prefix or no REX prefix. */ | |
944 | if (ABI_64_P (abfd)) | |
945 | return FALSE; | |
946 | } | |
947 | } | |
948 | else | |
949 | { | |
950 | /* X32 may not have any REX prefix. */ | |
951 | if (ABI_64_P (abfd)) | |
952 | return FALSE; | |
953 | if (offset < 2 || (offset + 3) > sec->size) | |
954 | return FALSE; | |
955 | } | |
142411ca L |
956 | |
957 | val = bfd_get_8 (abfd, contents + offset - 2); | |
958 | if (val != 0x8b && val != 0x03) | |
959 | return FALSE; | |
960 | ||
961 | val = bfd_get_8 (abfd, contents + offset - 1); | |
962 | return (val & 0xc7) == 5; | |
963 | ||
964 | case R_X86_64_GOTPC32_TLSDESC: | |
965 | /* Check transition from GDesc access model: | |
966 | leaq x@tlsdesc(%rip), %rax | |
967 | ||
968 | Make sure it's a leaq adding rip to a 32-bit offset | |
969 | into any register, although it's probably almost always | |
970 | going to be rax. */ | |
971 | ||
972 | if (offset < 3 || (offset + 4) > sec->size) | |
973 | return FALSE; | |
974 | ||
975 | val = bfd_get_8 (abfd, contents + offset - 3); | |
976 | if ((val & 0xfb) != 0x48) | |
977 | return FALSE; | |
978 | ||
979 | if (bfd_get_8 (abfd, contents + offset - 2) != 0x8d) | |
980 | return FALSE; | |
981 | ||
982 | val = bfd_get_8 (abfd, contents + offset - 1); | |
983 | return (val & 0xc7) == 0x05; | |
984 | ||
985 | case R_X86_64_TLSDESC_CALL: | |
986 | /* Check transition from GDesc access model: | |
987 | call *x@tlsdesc(%rax) | |
988 | */ | |
989 | if (offset + 2 <= sec->size) | |
990 | { | |
991 | /* Make sure that it's a call *x@tlsdesc(%rax). */ | |
992 | static x86_64_opcode16 call = { { 0xff, 0x10 } }; | |
993 | return bfd_get_16 (abfd, contents + offset) == call.i; | |
994 | } | |
995 | ||
996 | return FALSE; | |
997 | ||
998 | default: | |
999 | abort (); | |
1000 | } | |
1001 | } | |
1002 | ||
1003 | /* Return TRUE if the TLS access transition is OK or no transition | |
1004 | will be performed. Update R_TYPE if there is a transition. */ | |
1005 | ||
1006 | static bfd_boolean | |
351f65ca L |
1007 | elf_x86_64_tls_transition (struct bfd_link_info *info, bfd *abfd, |
1008 | asection *sec, bfd_byte *contents, | |
1009 | Elf_Internal_Shdr *symtab_hdr, | |
1010 | struct elf_link_hash_entry **sym_hashes, | |
1011 | unsigned int *r_type, int tls_type, | |
1012 | const Elf_Internal_Rela *rel, | |
1013 | const Elf_Internal_Rela *relend, | |
1014 | struct elf_link_hash_entry *h, | |
1015 | unsigned long r_symndx) | |
142411ca L |
1016 | { |
1017 | unsigned int from_type = *r_type; | |
1018 | unsigned int to_type = from_type; | |
1019 | bfd_boolean check = TRUE; | |
1020 | ||
bb1cb422 L |
1021 | /* Skip TLS transition for functions. */ |
1022 | if (h != NULL | |
1023 | && (h->type == STT_FUNC | |
1024 | || h->type == STT_GNU_IFUNC)) | |
1025 | return TRUE; | |
1026 | ||
142411ca | 1027 | switch (from_type) |
bffbf940 JJ |
1028 | { |
1029 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
1030 | case R_X86_64_GOTPC32_TLSDESC: |
1031 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 1032 | case R_X86_64_GOTTPOFF: |
1d85728f | 1033 | if (info->executable) |
142411ca L |
1034 | { |
1035 | if (h == NULL) | |
1036 | to_type = R_X86_64_TPOFF32; | |
1037 | else | |
1038 | to_type = R_X86_64_GOTTPOFF; | |
1039 | } | |
1040 | ||
351f65ca | 1041 | /* When we are called from elf_x86_64_relocate_section, |
142411ca L |
1042 | CONTENTS isn't NULL and there may be additional transitions |
1043 | based on TLS_TYPE. */ | |
1044 | if (contents != NULL) | |
1045 | { | |
1046 | unsigned int new_to_type = to_type; | |
1047 | ||
1d85728f | 1048 | if (info->executable |
142411ca L |
1049 | && h != NULL |
1050 | && h->dynindx == -1 | |
1051 | && tls_type == GOT_TLS_IE) | |
1052 | new_to_type = R_X86_64_TPOFF32; | |
1053 | ||
1054 | if (to_type == R_X86_64_TLSGD | |
1055 | || to_type == R_X86_64_GOTPC32_TLSDESC | |
1056 | || to_type == R_X86_64_TLSDESC_CALL) | |
1057 | { | |
1058 | if (tls_type == GOT_TLS_IE) | |
1059 | new_to_type = R_X86_64_GOTTPOFF; | |
1060 | } | |
1061 | ||
1062 | /* We checked the transition before when we were called from | |
351f65ca | 1063 | elf_x86_64_check_relocs. We only want to check the new |
142411ca L |
1064 | transition which hasn't been checked before. */ |
1065 | check = new_to_type != to_type && from_type == to_type; | |
1066 | to_type = new_to_type; | |
1067 | } | |
1068 | ||
1069 | break; | |
1070 | ||
bffbf940 | 1071 | case R_X86_64_TLSLD: |
1d85728f | 1072 | if (info->executable) |
142411ca L |
1073 | to_type = R_X86_64_TPOFF32; |
1074 | break; | |
1075 | ||
1076 | default: | |
1077 | return TRUE; | |
bffbf940 JJ |
1078 | } |
1079 | ||
142411ca L |
1080 | /* Return TRUE if there is no transition. */ |
1081 | if (from_type == to_type) | |
1082 | return TRUE; | |
1083 | ||
1084 | /* Check if the transition can be performed. */ | |
1085 | if (check | |
351f65ca L |
1086 | && ! elf_x86_64_check_tls_transition (abfd, info, sec, contents, |
1087 | symtab_hdr, sym_hashes, | |
1088 | from_type, rel, relend)) | |
142411ca | 1089 | { |
2f629d23 | 1090 | reloc_howto_type *from, *to; |
4c544807 | 1091 | const char *name; |
142411ca | 1092 | |
351f65ca L |
1093 | from = elf_x86_64_rtype_to_howto (abfd, from_type); |
1094 | to = elf_x86_64_rtype_to_howto (abfd, to_type); | |
142411ca | 1095 | |
4c544807 L |
1096 | if (h) |
1097 | name = h->root.root.string; | |
1098 | else | |
1099 | { | |
351f65ca | 1100 | struct elf_x86_64_link_hash_table *htab; |
4dfe6ac6 | 1101 | |
351f65ca | 1102 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1103 | if (htab == NULL) |
1104 | name = "*unknown*"; | |
1105 | else | |
1106 | { | |
1107 | Elf_Internal_Sym *isym; | |
1108 | ||
1109 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1110 | abfd, r_symndx); | |
1111 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1112 | } | |
4c544807 L |
1113 | } |
1114 | ||
142411ca L |
1115 | (*_bfd_error_handler) |
1116 | (_("%B: TLS transition from %s to %s against `%s' at 0x%lx " | |
1117 | "in section `%A' failed"), | |
4c544807 | 1118 | abfd, sec, from->name, to->name, name, |
142411ca L |
1119 | (unsigned long) rel->r_offset); |
1120 | bfd_set_error (bfd_error_bad_value); | |
1121 | return FALSE; | |
1122 | } | |
1123 | ||
1124 | *r_type = to_type; | |
1125 | return TRUE; | |
bffbf940 JJ |
1126 | } |
1127 | ||
70256ad8 | 1128 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
1129 | calculate needed space in the global offset table, procedure |
1130 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 1131 | |
b34976b6 | 1132 | static bfd_boolean |
351f65ca L |
1133 | elf_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, |
1134 | asection *sec, | |
1135 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1136 | { |
351f65ca | 1137 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1138 | Elf_Internal_Shdr *symtab_hdr; |
1139 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
1140 | const Elf_Internal_Rela *rel; |
1141 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
1142 | asection *sreloc; |
1143 | ||
1049f94e | 1144 | if (info->relocatable) |
b34976b6 | 1145 | return TRUE; |
70256ad8 | 1146 | |
0ffa91dd NC |
1147 | BFD_ASSERT (is_x86_64_elf (abfd)); |
1148 | ||
351f65ca | 1149 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1150 | if (htab == NULL) |
1151 | return FALSE; | |
1152 | ||
0ffa91dd | 1153 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 | 1154 | sym_hashes = elf_sym_hashes (abfd); |
70256ad8 | 1155 | |
c434dee6 | 1156 | sreloc = NULL; |
cbe950e9 | 1157 | |
70256ad8 AJ |
1158 | rel_end = relocs + sec->reloc_count; |
1159 | for (rel = relocs; rel < rel_end; rel++) | |
1160 | { | |
bffbf940 | 1161 | unsigned int r_type; |
70256ad8 AJ |
1162 | unsigned long r_symndx; |
1163 | struct elf_link_hash_entry *h; | |
4c544807 L |
1164 | Elf_Internal_Sym *isym; |
1165 | const char *name; | |
70256ad8 | 1166 | |
351f65ca L |
1167 | r_symndx = htab->r_sym (rel->r_info); |
1168 | r_type = ELF32_R_TYPE (rel->r_info); | |
c434dee6 AJ |
1169 | |
1170 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
1171 | { | |
d003868e AM |
1172 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
1173 | abfd, r_symndx); | |
b34976b6 | 1174 | return FALSE; |
c434dee6 AJ |
1175 | } |
1176 | ||
70256ad8 | 1177 | if (r_symndx < symtab_hdr->sh_info) |
c25bc9fc L |
1178 | { |
1179 | /* A local symbol. */ | |
c2e61a4e L |
1180 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, |
1181 | abfd, r_symndx); | |
1182 | if (isym == NULL) | |
1183 | return FALSE; | |
c25bc9fc L |
1184 | |
1185 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
351f65ca | 1186 | if (ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 1187 | { |
351f65ca L |
1188 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, |
1189 | TRUE); | |
c25bc9fc | 1190 | if (h == NULL) |
c2e61a4e | 1191 | return FALSE; |
6bbec505 | 1192 | |
c25bc9fc L |
1193 | /* Fake a STT_GNU_IFUNC symbol. */ |
1194 | h->type = STT_GNU_IFUNC; | |
1195 | h->def_regular = 1; | |
1196 | h->ref_regular = 1; | |
1197 | h->forced_local = 1; | |
1198 | h->root.type = bfd_link_hash_defined; | |
1199 | } | |
1200 | else | |
1201 | h = NULL; | |
1202 | } | |
70256ad8 | 1203 | else |
71cb9464 | 1204 | { |
4c544807 | 1205 | isym = NULL; |
71cb9464 L |
1206 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
1207 | while (h->root.type == bfd_link_hash_indirect | |
1208 | || h->root.type == bfd_link_hash_warning) | |
1209 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
c25bc9fc | 1210 | } |
cbe950e9 | 1211 | |
d1534d16 L |
1212 | /* Check invalid x32 relocations. */ |
1213 | if (!ABI_64_P (abfd)) | |
1214 | switch (r_type) | |
1215 | { | |
1216 | default: | |
1217 | break; | |
1218 | ||
1219 | case R_X86_64_64: | |
1220 | case R_X86_64_DTPOFF64: | |
1221 | case R_X86_64_TPOFF64: | |
1222 | case R_X86_64_PC64: | |
1223 | case R_X86_64_GOTOFF64: | |
1224 | case R_X86_64_GOT64: | |
1225 | case R_X86_64_GOTPCREL64: | |
1226 | case R_X86_64_GOTPC64: | |
1227 | case R_X86_64_GOTPLT64: | |
1228 | case R_X86_64_PLTOFF64: | |
1229 | { | |
1230 | if (h) | |
1231 | name = h->root.root.string; | |
1232 | else | |
1233 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1234 | NULL); | |
1235 | (*_bfd_error_handler) | |
1236 | (_("%B: relocation %s against symbol `%s' isn't " | |
1237 | "supported in x32 mode"), abfd, | |
1238 | x86_64_elf_howto_table[r_type].name, name); | |
1239 | bfd_set_error (bfd_error_bad_value); | |
1240 | return FALSE; | |
1241 | } | |
1242 | break; | |
1243 | } | |
1244 | ||
c25bc9fc L |
1245 | if (h != NULL) |
1246 | { | |
cbe950e9 L |
1247 | /* Create the ifunc sections for static executables. If we |
1248 | never see an indirect function symbol nor we are building | |
1249 | a static executable, those sections will be empty and | |
1250 | won't appear in output. */ | |
1251 | switch (r_type) | |
1252 | { | |
1253 | default: | |
1254 | break; | |
1255 | ||
1256 | case R_X86_64_32S: | |
1257 | case R_X86_64_32: | |
1258 | case R_X86_64_64: | |
1259 | case R_X86_64_PC32: | |
1260 | case R_X86_64_PC64: | |
1261 | case R_X86_64_PLT32: | |
1262 | case R_X86_64_GOTPCREL: | |
1263 | case R_X86_64_GOTPCREL64: | |
9d4057ee AM |
1264 | if (htab->elf.dynobj == NULL) |
1265 | htab->elf.dynobj = abfd; | |
1266 | if (!_bfd_elf_create_ifunc_sections (htab->elf.dynobj, info)) | |
c2e61a4e | 1267 | return FALSE; |
cbe950e9 L |
1268 | break; |
1269 | } | |
1270 | ||
1271 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle | |
1272 | it here if it is defined in a non-shared object. */ | |
1273 | if (h->type == STT_GNU_IFUNC | |
1274 | && h->def_regular) | |
1275 | { | |
1276 | /* It is referenced by a non-shared object. */ | |
1277 | h->ref_regular = 1; | |
7ae26bc1 | 1278 | h->needs_plt = 1; |
6bbec505 | 1279 | |
cbe950e9 L |
1280 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1281 | h->plt.refcount += 1; | |
1282 | ||
1283 | /* STT_GNU_IFUNC needs dynamic sections. */ | |
1284 | if (htab->elf.dynobj == NULL) | |
1285 | htab->elf.dynobj = abfd; | |
1286 | ||
1287 | switch (r_type) | |
1288 | { | |
048cbda4 | 1289 | default: |
4c544807 L |
1290 | if (h->root.root.string) |
1291 | name = h->root.root.string; | |
1292 | else | |
1293 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1294 | NULL); | |
048cbda4 L |
1295 | (*_bfd_error_handler) |
1296 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
1297 | "symbol `%s' isn't handled by %s"), abfd, | |
1298 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 1299 | name, __FUNCTION__); |
048cbda4 | 1300 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1301 | return FALSE; |
cbe950e9 | 1302 | |
248775ba L |
1303 | case R_X86_64_32: |
1304 | if (ABI_64_P (abfd)) | |
1305 | goto not_pointer; | |
710ab287 L |
1306 | case R_X86_64_64: |
1307 | h->non_got_ref = 1; | |
1308 | h->pointer_equality_needed = 1; | |
1309 | if (info->shared) | |
1310 | { | |
710ab287 L |
1311 | /* We must copy these reloc types into the output |
1312 | file. Create a reloc section in dynobj and | |
1313 | make room for this reloc. */ | |
e03a8ed8 L |
1314 | sreloc = _bfd_elf_create_ifunc_dyn_reloc |
1315 | (abfd, info, sec, sreloc, | |
351f65ca | 1316 | &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs); |
710ab287 | 1317 | if (sreloc == NULL) |
c2e61a4e | 1318 | return FALSE; |
710ab287 L |
1319 | } |
1320 | break; | |
1321 | ||
cbe950e9 | 1322 | case R_X86_64_32S: |
cbe950e9 L |
1323 | case R_X86_64_PC32: |
1324 | case R_X86_64_PC64: | |
248775ba | 1325 | not_pointer: |
cbe950e9 L |
1326 | h->non_got_ref = 1; |
1327 | if (r_type != R_X86_64_PC32 | |
1328 | && r_type != R_X86_64_PC64) | |
1329 | h->pointer_equality_needed = 1; | |
1330 | break; | |
1331 | ||
1332 | case R_X86_64_PLT32: | |
1333 | break; | |
1334 | ||
1335 | case R_X86_64_GOTPCREL: | |
1336 | case R_X86_64_GOTPCREL64: | |
7afd84dc | 1337 | h->got.refcount += 1; |
6de2ae4a L |
1338 | if (htab->elf.sgot == NULL |
1339 | && !_bfd_elf_create_got_section (htab->elf.dynobj, | |
1340 | info)) | |
c2e61a4e | 1341 | return FALSE; |
cbe950e9 L |
1342 | break; |
1343 | } | |
1344 | ||
1345 | continue; | |
1346 | } | |
71cb9464 | 1347 | } |
70256ad8 | 1348 | |
351f65ca L |
1349 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, |
1350 | symtab_hdr, sym_hashes, | |
1351 | &r_type, GOT_UNKNOWN, | |
1352 | rel, rel_end, h, r_symndx)) | |
c2e61a4e | 1353 | return FALSE; |
142411ca | 1354 | |
bffbf940 | 1355 | switch (r_type) |
70256ad8 | 1356 | { |
bffbf940 JJ |
1357 | case R_X86_64_TLSLD: |
1358 | htab->tls_ld_got.refcount += 1; | |
1359 | goto create_got; | |
1360 | ||
1361 | case R_X86_64_TPOFF32: | |
351f65ca | 1362 | if (!info->executable && ABI_64_P (abfd)) |
70256ad8 | 1363 | { |
09a24cbf | 1364 | if (h) |
4c544807 L |
1365 | name = h->root.root.string; |
1366 | else | |
1367 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, | |
1368 | NULL); | |
bffbf940 | 1369 | (*_bfd_error_handler) |
d003868e AM |
1370 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
1371 | abfd, | |
4c544807 | 1372 | x86_64_elf_howto_table[r_type].name, name); |
bffbf940 | 1373 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1374 | return FALSE; |
70256ad8 | 1375 | } |
bffbf940 | 1376 | break; |
c434dee6 | 1377 | |
bffbf940 | 1378 | case R_X86_64_GOTTPOFF: |
1d85728f | 1379 | if (!info->executable) |
bffbf940 JJ |
1380 | info->flags |= DF_STATIC_TLS; |
1381 | /* Fall through */ | |
70256ad8 | 1382 | |
bffbf940 JJ |
1383 | case R_X86_64_GOT32: |
1384 | case R_X86_64_GOTPCREL: | |
1385 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
1386 | case R_X86_64_GOT64: |
1387 | case R_X86_64_GOTPCREL64: | |
1388 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
1389 | case R_X86_64_GOTPC32_TLSDESC: |
1390 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
1391 | /* This symbol requires a global offset table entry. */ |
1392 | { | |
1393 | int tls_type, old_tls_type; | |
1394 | ||
1395 | switch (r_type) | |
1396 | { | |
1397 | default: tls_type = GOT_NORMAL; break; | |
1398 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
1399 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
1400 | case R_X86_64_GOTPC32_TLSDESC: |
1401 | case R_X86_64_TLSDESC_CALL: | |
1402 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
1403 | } |
1404 | ||
1405 | if (h != NULL) | |
1406 | { | |
7b81dfbb AJ |
1407 | if (r_type == R_X86_64_GOTPLT64) |
1408 | { | |
1409 | /* This relocation indicates that we also need | |
1410 | a PLT entry, as this is a function. We don't need | |
1411 | a PLT entry for local symbols. */ | |
1412 | h->needs_plt = 1; | |
1413 | h->plt.refcount += 1; | |
1414 | } | |
bffbf940 | 1415 | h->got.refcount += 1; |
351f65ca | 1416 | old_tls_type = elf_x86_64_hash_entry (h)->tls_type; |
bffbf940 JJ |
1417 | } |
1418 | else | |
1419 | { | |
1420 | bfd_signed_vma *local_got_refcounts; | |
1421 | ||
1422 | /* This is a global offset table entry for a local symbol. */ | |
1423 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1424 | if (local_got_refcounts == NULL) | |
1425 | { | |
1426 | bfd_size_type size; | |
1427 | ||
1428 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
1429 | size *= sizeof (bfd_signed_vma) |
1430 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
1431 | local_got_refcounts = ((bfd_signed_vma *) |
1432 | bfd_zalloc (abfd, size)); | |
1433 | if (local_got_refcounts == NULL) | |
c2e61a4e | 1434 | return FALSE; |
bffbf940 | 1435 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
351f65ca | 1436 | elf_x86_64_local_tlsdesc_gotent (abfd) |
67a4f2b7 | 1437 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); |
351f65ca | 1438 | elf_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 1439 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
1440 | } |
1441 | local_got_refcounts[r_symndx] += 1; | |
1442 | old_tls_type | |
351f65ca | 1443 | = elf_x86_64_local_got_tls_type (abfd) [r_symndx]; |
bffbf940 JJ |
1444 | } |
1445 | ||
1446 | /* If a TLS symbol is accessed using IE at least once, | |
1447 | there is no point to use dynamic model for it. */ | |
1448 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
1449 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
1450 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 1451 | { |
67a4f2b7 | 1452 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 1453 | tls_type = old_tls_type; |
67a4f2b7 AO |
1454 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
1455 | && GOT_TLS_GD_ANY_P (tls_type)) | |
1456 | tls_type |= old_tls_type; | |
bffbf940 JJ |
1457 | else |
1458 | { | |
09a24cbf | 1459 | if (h) |
4c544807 L |
1460 | name = h->root.root.string; |
1461 | else | |
1462 | name = bfd_elf_sym_name (abfd, symtab_hdr, | |
1463 | isym, NULL); | |
bffbf940 | 1464 | (*_bfd_error_handler) |
1f7a4e42 | 1465 | (_("%B: '%s' accessed both as normal and thread local symbol"), |
4c544807 | 1466 | abfd, name); |
c2e61a4e | 1467 | return FALSE; |
bffbf940 JJ |
1468 | } |
1469 | } | |
1470 | ||
1471 | if (old_tls_type != tls_type) | |
1472 | { | |
1473 | if (h != NULL) | |
351f65ca | 1474 | elf_x86_64_hash_entry (h)->tls_type = tls_type; |
bffbf940 | 1475 | else |
351f65ca | 1476 | elf_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; |
bffbf940 JJ |
1477 | } |
1478 | } | |
c434dee6 AJ |
1479 | /* Fall through */ |
1480 | ||
d6ab8113 JB |
1481 | case R_X86_64_GOTOFF64: |
1482 | case R_X86_64_GOTPC32: | |
7b81dfbb | 1483 | case R_X86_64_GOTPC64: |
bffbf940 | 1484 | create_got: |
6de2ae4a | 1485 | if (htab->elf.sgot == NULL) |
c434dee6 AJ |
1486 | { |
1487 | if (htab->elf.dynobj == NULL) | |
1488 | htab->elf.dynobj = abfd; | |
6de2ae4a L |
1489 | if (!_bfd_elf_create_got_section (htab->elf.dynobj, |
1490 | info)) | |
c2e61a4e | 1491 | return FALSE; |
c434dee6 | 1492 | } |
70256ad8 AJ |
1493 | break; |
1494 | ||
1495 | case R_X86_64_PLT32: | |
1496 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
1497 | actually build the entry in adjust_dynamic_symbol, |
1498 | because this might be a case of linking PIC code which is | |
1499 | never referenced by a dynamic object, in which case we | |
1500 | don't need to generate a procedure linkage table entry | |
1501 | after all. */ | |
70256ad8 AJ |
1502 | |
1503 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 1504 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
1505 | if (h == NULL) |
1506 | continue; | |
1507 | ||
f5385ebf | 1508 | h->needs_plt = 1; |
51b64d56 | 1509 | h->plt.refcount += 1; |
70256ad8 AJ |
1510 | break; |
1511 | ||
7b81dfbb AJ |
1512 | case R_X86_64_PLTOFF64: |
1513 | /* This tries to form the 'address' of a function relative | |
1514 | to GOT. For global symbols we need a PLT entry. */ | |
1515 | if (h != NULL) | |
1516 | { | |
1517 | h->needs_plt = 1; | |
1518 | h->plt.refcount += 1; | |
1519 | } | |
1520 | goto create_got; | |
1521 | ||
248775ba L |
1522 | case R_X86_64_32: |
1523 | if (!ABI_64_P (abfd)) | |
1524 | goto pointer; | |
cc78d0af AJ |
1525 | case R_X86_64_8: |
1526 | case R_X86_64_16: | |
70256ad8 | 1527 | case R_X86_64_32S: |
1b71fb54 AJ |
1528 | /* Let's help debug shared library creation. These relocs |
1529 | cannot be used in shared libs. Don't error out for | |
1530 | sections we don't care about, such as debug sections or | |
1531 | non-constant sections. */ | |
1532 | if (info->shared | |
1533 | && (sec->flags & SEC_ALLOC) != 0 | |
1534 | && (sec->flags & SEC_READONLY) != 0) | |
1535 | { | |
09a24cbf | 1536 | if (h) |
4c544807 L |
1537 | name = h->root.root.string; |
1538 | else | |
1539 | name = bfd_elf_sym_name (abfd, symtab_hdr, isym, NULL); | |
1b71fb54 | 1540 | (*_bfd_error_handler) |
d003868e | 1541 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
4c544807 | 1542 | abfd, x86_64_elf_howto_table[r_type].name, name); |
1b71fb54 | 1543 | bfd_set_error (bfd_error_bad_value); |
c2e61a4e | 1544 | return FALSE; |
1b71fb54 AJ |
1545 | } |
1546 | /* Fall through. */ | |
1547 | ||
c434dee6 AJ |
1548 | case R_X86_64_PC8: |
1549 | case R_X86_64_PC16: | |
70256ad8 | 1550 | case R_X86_64_PC32: |
d6ab8113 | 1551 | case R_X86_64_PC64: |
1b71fb54 | 1552 | case R_X86_64_64: |
248775ba | 1553 | pointer: |
710ab287 | 1554 | if (h != NULL && info->executable) |
c434dee6 AJ |
1555 | { |
1556 | /* If this reloc is in a read-only section, we might | |
1557 | need a copy reloc. We can't check reliably at this | |
1558 | stage whether the section is read-only, as input | |
1559 | sections have not yet been mapped to output sections. | |
1560 | Tentatively set the flag for now, and correct in | |
1561 | adjust_dynamic_symbol. */ | |
f5385ebf | 1562 | h->non_got_ref = 1; |
c434dee6 AJ |
1563 | |
1564 | /* We may need a .plt entry if the function this reloc | |
1565 | refers to is in a shared lib. */ | |
1566 | h->plt.refcount += 1; | |
d6ab8113 | 1567 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 1568 | h->pointer_equality_needed = 1; |
c434dee6 | 1569 | } |
70256ad8 AJ |
1570 | |
1571 | /* If we are creating a shared library, and this is a reloc | |
1572 | against a global symbol, or a non PC relative reloc | |
1573 | against a local symbol, then we need to copy the reloc | |
1574 | into the shared library. However, if we are linking with | |
1575 | -Bsymbolic, we do not need to copy a reloc against a | |
1576 | global symbol which is defined in an object we are | |
407443a3 | 1577 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
1578 | this point we have not seen all the input files, so it is |
1579 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1580 | later (it is never cleared). In case of a weak definition, |
1581 | DEF_REGULAR may be cleared later by a strong definition in | |
1582 | a shared library. We account for that possibility below by | |
1583 | storing information in the relocs_copied field of the hash | |
1584 | table entry. A similar situation occurs when creating | |
1585 | shared libraries and symbol visibility changes render the | |
1586 | symbol local. | |
1587 | ||
1588 | If on the other hand, we are creating an executable, we | |
1589 | may need to keep relocations for symbols satisfied by a | |
1590 | dynamic library if we manage to avoid copy relocs for the | |
0f88be7a | 1591 | symbol. */ |
c434dee6 AJ |
1592 | if ((info->shared |
1593 | && (sec->flags & SEC_ALLOC) != 0 | |
d8045f23 | 1594 | && (! IS_X86_64_PCREL_TYPE (r_type) |
c434dee6 | 1595 | || (h != NULL |
55255dae | 1596 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1597 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1598 | || !h->def_regular)))) |
d40d037c AJ |
1599 | || (ELIMINATE_COPY_RELOCS |
1600 | && !info->shared | |
c434dee6 AJ |
1601 | && (sec->flags & SEC_ALLOC) != 0 |
1602 | && h != NULL | |
1603 | && (h->root.type == bfd_link_hash_defweak | |
0f88be7a | 1604 | || !h->def_regular))) |
70256ad8 | 1605 | { |
e03a8ed8 L |
1606 | struct elf_dyn_relocs *p; |
1607 | struct elf_dyn_relocs **head; | |
c434dee6 AJ |
1608 | |
1609 | /* We must copy these reloc types into the output file. | |
1610 | Create a reloc section in dynobj and make room for | |
1611 | this reloc. */ | |
70256ad8 AJ |
1612 | if (sreloc == NULL) |
1613 | { | |
c434dee6 AJ |
1614 | if (htab->elf.dynobj == NULL) |
1615 | htab->elf.dynobj = abfd; | |
1616 | ||
83bac4b0 | 1617 | sreloc = _bfd_elf_make_dynamic_reloc_section |
82e96e07 L |
1618 | (sec, htab->elf.dynobj, ABI_64_P (abfd) ? 3 : 2, |
1619 | abfd, /*rela?*/ TRUE); | |
70256ad8 | 1620 | |
70256ad8 | 1621 | if (sreloc == NULL) |
c2e61a4e | 1622 | return FALSE; |
70256ad8 AJ |
1623 | } |
1624 | ||
c434dee6 AJ |
1625 | /* If this is a global symbol, we count the number of |
1626 | relocations we need for this symbol. */ | |
1627 | if (h != NULL) | |
70256ad8 | 1628 | { |
351f65ca | 1629 | head = &((struct elf_x86_64_link_hash_entry *) h)->dyn_relocs; |
c434dee6 AJ |
1630 | } |
1631 | else | |
1632 | { | |
1633 | /* Track dynamic relocs needed for local syms too. | |
1634 | We really need local syms available to do this | |
1635 | easily. Oh well. */ | |
c434dee6 | 1636 | asection *s; |
87d72d41 | 1637 | void **vpp; |
87d72d41 AM |
1638 | |
1639 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1640 | abfd, r_symndx); | |
1641 | if (isym == NULL) | |
1642 | return FALSE; | |
1643 | ||
1644 | s = bfd_section_from_elf_index (abfd, isym->st_shndx); | |
c434dee6 | 1645 | if (s == NULL) |
87d72d41 | 1646 | s = sec; |
70256ad8 | 1647 | |
e81d3500 DD |
1648 | /* Beware of type punned pointers vs strict aliasing |
1649 | rules. */ | |
1650 | vpp = &(elf_section_data (s)->local_dynrel); | |
e03a8ed8 | 1651 | head = (struct elf_dyn_relocs **)vpp; |
c434dee6 | 1652 | } |
70256ad8 | 1653 | |
c434dee6 AJ |
1654 | p = *head; |
1655 | if (p == NULL || p->sec != sec) | |
1656 | { | |
1657 | bfd_size_type amt = sizeof *p; | |
d8045f23 | 1658 | |
e03a8ed8 | 1659 | p = ((struct elf_dyn_relocs *) |
c434dee6 | 1660 | bfd_alloc (htab->elf.dynobj, amt)); |
70256ad8 | 1661 | if (p == NULL) |
c2e61a4e | 1662 | return FALSE; |
c434dee6 AJ |
1663 | p->next = *head; |
1664 | *head = p; | |
1665 | p->sec = sec; | |
1666 | p->count = 0; | |
1667 | p->pc_count = 0; | |
70256ad8 | 1668 | } |
c434dee6 AJ |
1669 | |
1670 | p->count += 1; | |
d8045f23 | 1671 | if (IS_X86_64_PCREL_TYPE (r_type)) |
c434dee6 | 1672 | p->pc_count += 1; |
70256ad8 AJ |
1673 | } |
1674 | break; | |
fe4770f4 AJ |
1675 | |
1676 | /* This relocation describes the C++ object vtable hierarchy. | |
1677 | Reconstruct it for later use during GC. */ | |
1678 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1679 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
c2e61a4e | 1680 | return FALSE; |
fe4770f4 AJ |
1681 | break; |
1682 | ||
1683 | /* This relocation describes which C++ vtable entries are actually | |
1684 | used. Record for later use during GC. */ | |
1685 | case R_X86_64_GNU_VTENTRY: | |
d17e0c6e JB |
1686 | BFD_ASSERT (h != NULL); |
1687 | if (h != NULL | |
1688 | && !bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) | |
c2e61a4e | 1689 | return FALSE; |
fe4770f4 | 1690 | break; |
c434dee6 AJ |
1691 | |
1692 | default: | |
1693 | break; | |
70256ad8 AJ |
1694 | } |
1695 | } | |
1696 | ||
b34976b6 | 1697 | return TRUE; |
70256ad8 AJ |
1698 | } |
1699 | ||
1700 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1701 | relocation. */ |
70256ad8 AJ |
1702 | |
1703 | static asection * | |
351f65ca L |
1704 | elf_x86_64_gc_mark_hook (asection *sec, |
1705 | struct bfd_link_info *info, | |
1706 | Elf_Internal_Rela *rel, | |
1707 | struct elf_link_hash_entry *h, | |
1708 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1709 | { |
1710 | if (h != NULL) | |
351f65ca | 1711 | switch (ELF32_R_TYPE (rel->r_info)) |
07adf181 AM |
1712 | { |
1713 | case R_X86_64_GNU_VTINHERIT: | |
1714 | case R_X86_64_GNU_VTENTRY: | |
1715 | return NULL; | |
1716 | } | |
1717 | ||
1718 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1719 | } |
1720 | ||
407443a3 | 1721 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1722 | |
b34976b6 | 1723 | static bfd_boolean |
351f65ca L |
1724 | elf_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1725 | asection *sec, | |
1726 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 1727 | { |
351f65ca | 1728 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1729 | Elf_Internal_Shdr *symtab_hdr; |
1730 | struct elf_link_hash_entry **sym_hashes; | |
1731 | bfd_signed_vma *local_got_refcounts; | |
1732 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 | 1733 | |
7dda2462 TG |
1734 | if (info->relocatable) |
1735 | return TRUE; | |
1736 | ||
351f65ca | 1737 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
1738 | if (htab == NULL) |
1739 | return FALSE; | |
1740 | ||
c434dee6 | 1741 | elf_section_data (sec)->local_dynrel = NULL; |
70256ad8 | 1742 | |
0ffa91dd | 1743 | symtab_hdr = &elf_symtab_hdr (abfd); |
70256ad8 AJ |
1744 | sym_hashes = elf_sym_hashes (abfd); |
1745 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1746 | ||
351f65ca | 1747 | htab = elf_x86_64_hash_table (info); |
70256ad8 AJ |
1748 | relend = relocs + sec->reloc_count; |
1749 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1750 | { |
1751 | unsigned long r_symndx; | |
1752 | unsigned int r_type; | |
1753 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1754 | |
351f65ca | 1755 | r_symndx = htab->r_sym (rel->r_info); |
26e41594 AM |
1756 | if (r_symndx >= symtab_hdr->sh_info) |
1757 | { | |
26e41594 | 1758 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1759 | while (h->root.type == bfd_link_hash_indirect |
1760 | || h->root.type == bfd_link_hash_warning) | |
1761 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1762 | } |
bb1cb422 L |
1763 | else |
1764 | { | |
1765 | /* A local symbol. */ | |
1766 | Elf_Internal_Sym *isym; | |
1767 | ||
1768 | isym = bfd_sym_from_r_symndx (&htab->sym_cache, | |
1769 | abfd, r_symndx); | |
1770 | ||
1771 | /* Check relocation against local STT_GNU_IFUNC symbol. */ | |
1772 | if (isym != NULL | |
82e96e07 | 1773 | && ELF_ST_TYPE (isym->st_info) == STT_GNU_IFUNC) |
bb1cb422 | 1774 | { |
351f65ca | 1775 | h = elf_x86_64_get_local_sym_hash (htab, abfd, rel, FALSE); |
bb1cb422 L |
1776 | if (h == NULL) |
1777 | abort (); | |
1778 | } | |
1779 | } | |
c434dee6 | 1780 | |
3db2e7dd L |
1781 | if (h) |
1782 | { | |
1783 | struct elf_x86_64_link_hash_entry *eh; | |
1784 | struct elf_dyn_relocs **pp; | |
1785 | struct elf_dyn_relocs *p; | |
1786 | ||
1787 | eh = (struct elf_x86_64_link_hash_entry *) h; | |
1788 | ||
1789 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) | |
1790 | if (p->sec == sec) | |
1791 | { | |
1792 | /* Everything must go for SEC. */ | |
1793 | *pp = p->next; | |
1794 | break; | |
1795 | } | |
1796 | } | |
1797 | ||
351f65ca L |
1798 | r_type = ELF32_R_TYPE (rel->r_info); |
1799 | if (! elf_x86_64_tls_transition (info, abfd, sec, NULL, | |
1800 | symtab_hdr, sym_hashes, | |
1801 | &r_type, GOT_UNKNOWN, | |
1802 | rel, relend, h, r_symndx)) | |
142411ca L |
1803 | return FALSE; |
1804 | ||
26e41594 AM |
1805 | switch (r_type) |
1806 | { | |
1807 | case R_X86_64_TLSLD: | |
4dfe6ac6 NC |
1808 | if (htab->tls_ld_got.refcount > 0) |
1809 | htab->tls_ld_got.refcount -= 1; | |
26e41594 | 1810 | break; |
c434dee6 | 1811 | |
26e41594 | 1812 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1813 | case R_X86_64_GOTPC32_TLSDESC: |
1814 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1815 | case R_X86_64_GOTTPOFF: |
1816 | case R_X86_64_GOT32: | |
1817 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
1818 | case R_X86_64_GOT64: |
1819 | case R_X86_64_GOTPCREL64: | |
1820 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
1821 | if (h != NULL) |
1822 | { | |
7b81dfbb AJ |
1823 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
1824 | h->plt.refcount -= 1; | |
26e41594 AM |
1825 | if (h->got.refcount > 0) |
1826 | h->got.refcount -= 1; | |
bb1cb422 L |
1827 | if (h->type == STT_GNU_IFUNC) |
1828 | { | |
1829 | if (h->plt.refcount > 0) | |
1830 | h->plt.refcount -= 1; | |
1831 | } | |
26e41594 AM |
1832 | } |
1833 | else if (local_got_refcounts != NULL) | |
1834 | { | |
1835 | if (local_got_refcounts[r_symndx] > 0) | |
1836 | local_got_refcounts[r_symndx] -= 1; | |
1837 | } | |
1838 | break; | |
c434dee6 | 1839 | |
26e41594 AM |
1840 | case R_X86_64_8: |
1841 | case R_X86_64_16: | |
1842 | case R_X86_64_32: | |
1843 | case R_X86_64_64: | |
1844 | case R_X86_64_32S: | |
1845 | case R_X86_64_PC8: | |
1846 | case R_X86_64_PC16: | |
1847 | case R_X86_64_PC32: | |
d6ab8113 | 1848 | case R_X86_64_PC64: |
3db2e7dd L |
1849 | if (info->shared |
1850 | && (h == NULL || h->type != STT_GNU_IFUNC)) | |
26e41594 AM |
1851 | break; |
1852 | /* Fall thru */ | |
c434dee6 | 1853 | |
26e41594 | 1854 | case R_X86_64_PLT32: |
7b81dfbb | 1855 | case R_X86_64_PLTOFF64: |
26e41594 AM |
1856 | if (h != NULL) |
1857 | { | |
1858 | if (h->plt.refcount > 0) | |
1859 | h->plt.refcount -= 1; | |
1860 | } | |
1861 | break; | |
70256ad8 | 1862 | |
26e41594 AM |
1863 | default: |
1864 | break; | |
1865 | } | |
1866 | } | |
70256ad8 | 1867 | |
b34976b6 | 1868 | return TRUE; |
70256ad8 AJ |
1869 | } |
1870 | ||
1871 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1872 | regular object. The current definition is in some section of the | |
1873 | dynamic object, but we're not including those sections. We have to | |
1874 | change the definition to something the rest of the link can | |
407443a3 | 1875 | understand. */ |
70256ad8 | 1876 | |
b34976b6 | 1877 | static bfd_boolean |
351f65ca L |
1878 | elf_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1879 | struct elf_link_hash_entry *h) | |
70256ad8 | 1880 | { |
351f65ca | 1881 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 1882 | asection *s; |
70256ad8 | 1883 | |
cbe950e9 L |
1884 | /* STT_GNU_IFUNC symbol must go through PLT. */ |
1885 | if (h->type == STT_GNU_IFUNC) | |
1886 | { | |
1887 | if (h->plt.refcount <= 0) | |
1888 | { | |
1889 | h->plt.offset = (bfd_vma) -1; | |
1890 | h->needs_plt = 0; | |
1891 | } | |
1892 | return TRUE; | |
1893 | } | |
1894 | ||
70256ad8 AJ |
1895 | /* If this is a function, put it in the procedure linkage table. We |
1896 | will fill in the contents of the procedure linkage table later, | |
1897 | when we know the address of the .got section. */ | |
1898 | if (h->type == STT_FUNC | |
f5385ebf | 1899 | || h->needs_plt) |
70256ad8 | 1900 | { |
c434dee6 | 1901 | if (h->plt.refcount <= 0 |
27482721 AJ |
1902 | || SYMBOL_CALLS_LOCAL (info, h) |
1903 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1904 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1905 | { |
70256ad8 AJ |
1906 | /* This case can occur if we saw a PLT32 reloc in an input |
1907 | file, but the symbol was never referred to by a dynamic | |
1908 | object, or if all references were garbage collected. In | |
1909 | such a case, we don't actually need to build a procedure | |
1910 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1911 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1912 | h->needs_plt = 0; |
70256ad8 AJ |
1913 | } |
1914 | ||
b34976b6 | 1915 | return TRUE; |
70256ad8 | 1916 | } |
bbd7ec4a | 1917 | else |
c434dee6 AJ |
1918 | /* It's possible that we incorrectly decided a .plt reloc was |
1919 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1920 | check_relocs. We can't decide accurately between function and | |
1921 | non-function syms in check-relocs; Objects loaded later in | |
1922 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1923 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1924 | |
1925 | /* If this is a weak symbol, and there is a real definition, the | |
1926 | processor independent code will have arranged for us to see the | |
407443a3 | 1927 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1928 | if (h->u.weakdef != NULL) |
70256ad8 | 1929 | { |
f6e332e6 AM |
1930 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1931 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1932 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1933 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1934 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1935 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1936 | return TRUE; |
70256ad8 AJ |
1937 | } |
1938 | ||
1939 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1940 | is not a function. */ |
70256ad8 AJ |
1941 | |
1942 | /* If we are creating a shared library, we must presume that the | |
1943 | only references to the symbol are via the global offset table. | |
1944 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1945 | be handled correctly by relocate_section. */ |
70256ad8 | 1946 | if (info->shared) |
b34976b6 | 1947 | return TRUE; |
70256ad8 AJ |
1948 | |
1949 | /* If there are no references to this symbol that do not use the | |
1950 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1951 | if (!h->non_got_ref) |
b34976b6 | 1952 | return TRUE; |
70256ad8 | 1953 | |
c434dee6 AJ |
1954 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1955 | if (info->nocopyreloc) | |
1956 | { | |
f5385ebf | 1957 | h->non_got_ref = 0; |
b34976b6 | 1958 | return TRUE; |
c434dee6 AJ |
1959 | } |
1960 | ||
d40d037c | 1961 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1962 | { |
351f65ca | 1963 | struct elf_x86_64_link_hash_entry * eh; |
e03a8ed8 | 1964 | struct elf_dyn_relocs *p; |
c434dee6 | 1965 | |
351f65ca | 1966 | eh = (struct elf_x86_64_link_hash_entry *) h; |
d40d037c AJ |
1967 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
1968 | { | |
1969 | s = p->sec->output_section; | |
1970 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1971 | break; | |
1972 | } | |
1973 | ||
1974 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1975 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1976 | if (p == NULL) | |
1977 | { | |
f5385ebf | 1978 | h->non_got_ref = 0; |
d40d037c AJ |
1979 | return TRUE; |
1980 | } | |
c434dee6 AJ |
1981 | } |
1982 | ||
909272ee AM |
1983 | if (h->size == 0) |
1984 | { | |
1985 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1986 | h->root.root.string); | |
1987 | return TRUE; | |
1988 | } | |
1989 | ||
70256ad8 | 1990 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1991 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1992 | an entry for this symbol in the .dynsym section. The dynamic |
1993 | object will contain position independent code, so all references | |
1994 | from the dynamic object to this symbol will go through the global | |
1995 | offset table. The dynamic linker will use the .dynsym entry to | |
1996 | determine the address it must put in the global offset table, so | |
1997 | both the dynamic object and the regular object will refer to the | |
1998 | same memory location for the variable. */ | |
1999 | ||
351f65ca | 2000 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2001 | if (htab == NULL) |
2002 | return FALSE; | |
70256ad8 AJ |
2003 | |
2004 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
2005 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 2006 | runtime process image. */ |
70256ad8 AJ |
2007 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
2008 | { | |
351f65ca L |
2009 | const struct elf_backend_data *bed; |
2010 | bed = get_elf_backend_data (info->output_bfd); | |
2011 | htab->srelbss->size += bed->s->sizeof_rela; | |
f5385ebf | 2012 | h->needs_copy = 1; |
70256ad8 AJ |
2013 | } |
2014 | ||
c434dee6 | 2015 | s = htab->sdynbss; |
70256ad8 | 2016 | |
027297b7 | 2017 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
2018 | } |
2019 | ||
c434dee6 AJ |
2020 | /* Allocate space in .plt, .got and associated reloc sections for |
2021 | dynamic relocs. */ | |
2022 | ||
b34976b6 | 2023 | static bfd_boolean |
351f65ca | 2024 | elf_x86_64_allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
2025 | { |
2026 | struct bfd_link_info *info; | |
351f65ca L |
2027 | struct elf_x86_64_link_hash_table *htab; |
2028 | struct elf_x86_64_link_hash_entry *eh; | |
e03a8ed8 | 2029 | struct elf_dyn_relocs *p; |
351f65ca | 2030 | const struct elf_backend_data *bed; |
c434dee6 | 2031 | |
e92d460e | 2032 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 2033 | return TRUE; |
c434dee6 | 2034 | |
e92d460e AM |
2035 | if (h->root.type == bfd_link_hash_warning) |
2036 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
351f65ca | 2037 | eh = (struct elf_x86_64_link_hash_entry *) h; |
e92d460e | 2038 | |
c434dee6 | 2039 | info = (struct bfd_link_info *) inf; |
351f65ca | 2040 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2041 | if (htab == NULL) |
2042 | return FALSE; | |
351f65ca | 2043 | bed = get_elf_backend_data (info->output_bfd); |
c434dee6 | 2044 | |
cbe950e9 L |
2045 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle it |
2046 | here if it is defined and referenced in a non-shared object. */ | |
2047 | if (h->type == STT_GNU_IFUNC | |
2048 | && h->def_regular) | |
e03a8ed8 L |
2049 | return _bfd_elf_allocate_ifunc_dyn_relocs (info, h, |
2050 | &eh->dyn_relocs, | |
2051 | PLT_ENTRY_SIZE, | |
2052 | GOT_ENTRY_SIZE); | |
cbe950e9 L |
2053 | else if (htab->elf.dynamic_sections_created |
2054 | && h->plt.refcount > 0) | |
c434dee6 AJ |
2055 | { |
2056 | /* Make sure this symbol is output as a dynamic symbol. | |
2057 | Undefined weak syms won't yet be marked as dynamic. */ | |
2058 | if (h->dynindx == -1 | |
f5385ebf | 2059 | && !h->forced_local) |
c434dee6 | 2060 | { |
c152c796 | 2061 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2062 | return FALSE; |
c434dee6 AJ |
2063 | } |
2064 | ||
27482721 AJ |
2065 | if (info->shared |
2066 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 | 2067 | { |
6de2ae4a | 2068 | asection *s = htab->elf.splt; |
c434dee6 AJ |
2069 | |
2070 | /* If this is the first .plt entry, make room for the special | |
2071 | first entry. */ | |
eea6121a AM |
2072 | if (s->size == 0) |
2073 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 2074 | |
eea6121a | 2075 | h->plt.offset = s->size; |
c434dee6 AJ |
2076 | |
2077 | /* If this symbol is not defined in a regular file, and we are | |
2078 | not generating a shared library, then set the symbol to this | |
2079 | location in the .plt. This is required to make function | |
2080 | pointers compare as equal between the normal executable and | |
2081 | the shared library. */ | |
2082 | if (! info->shared | |
f5385ebf | 2083 | && !h->def_regular) |
c434dee6 AJ |
2084 | { |
2085 | h->root.u.def.section = s; | |
2086 | h->root.u.def.value = h->plt.offset; | |
2087 | } | |
2088 | ||
2089 | /* Make room for this entry. */ | |
eea6121a | 2090 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
2091 | |
2092 | /* We also need to make an entry in the .got.plt section, which | |
2093 | will be placed in the .got section by the linker script. */ | |
6de2ae4a | 2094 | htab->elf.sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
2095 | |
2096 | /* We also need to make an entry in the .rela.plt section. */ | |
351f65ca | 2097 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
6de2ae4a | 2098 | htab->elf.srelplt->reloc_count++; |
c434dee6 AJ |
2099 | } |
2100 | else | |
2101 | { | |
2102 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2103 | h->needs_plt = 0; |
c434dee6 AJ |
2104 | } |
2105 | } | |
2106 | else | |
2107 | { | |
2108 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 2109 | h->needs_plt = 0; |
c434dee6 AJ |
2110 | } |
2111 | ||
67a4f2b7 AO |
2112 | eh->tlsdesc_got = (bfd_vma) -1; |
2113 | ||
bffbf940 JJ |
2114 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
2115 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
2116 | if (h->got.refcount > 0 | |
1d85728f | 2117 | && info->executable |
bffbf940 | 2118 | && h->dynindx == -1 |
351f65ca | 2119 | && elf_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) |
d8045f23 NC |
2120 | { |
2121 | h->got.offset = (bfd_vma) -1; | |
2122 | } | |
bffbf940 | 2123 | else if (h->got.refcount > 0) |
c434dee6 AJ |
2124 | { |
2125 | asection *s; | |
b34976b6 | 2126 | bfd_boolean dyn; |
351f65ca | 2127 | int tls_type = elf_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
2128 | |
2129 | /* Make sure this symbol is output as a dynamic symbol. | |
2130 | Undefined weak syms won't yet be marked as dynamic. */ | |
2131 | if (h->dynindx == -1 | |
f5385ebf | 2132 | && !h->forced_local) |
c434dee6 | 2133 | { |
c152c796 | 2134 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 2135 | return FALSE; |
c434dee6 AJ |
2136 | } |
2137 | ||
67a4f2b7 AO |
2138 | if (GOT_TLS_GDESC_P (tls_type)) |
2139 | { | |
6de2ae4a | 2140 | eh->tlsdesc_got = htab->elf.sgotplt->size |
351f65ca | 2141 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2142 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2143 | h->got.offset = (bfd_vma) -2; |
2144 | } | |
2145 | if (! GOT_TLS_GDESC_P (tls_type) | |
2146 | || GOT_TLS_GD_P (tls_type)) | |
2147 | { | |
6de2ae4a | 2148 | s = htab->elf.sgot; |
67a4f2b7 AO |
2149 | h->got.offset = s->size; |
2150 | s->size += GOT_ENTRY_SIZE; | |
2151 | if (GOT_TLS_GD_P (tls_type)) | |
2152 | s->size += GOT_ENTRY_SIZE; | |
2153 | } | |
c434dee6 | 2154 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
2155 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
2156 | and two if global. | |
2157 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 2158 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 2159 | || tls_type == GOT_TLS_IE) |
351f65ca | 2160 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 | 2161 | else if (GOT_TLS_GD_P (tls_type)) |
351f65ca | 2162 | htab->elf.srelgot->size += 2 * bed->s->sizeof_rela; |
67a4f2b7 AO |
2163 | else if (! GOT_TLS_GDESC_P (tls_type) |
2164 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2165 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
2166 | && (info->shared |
2167 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
351f65ca | 2168 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2169 | if (GOT_TLS_GDESC_P (tls_type)) |
2170 | { | |
351f65ca | 2171 | htab->elf.srelplt->size += bed->s->sizeof_rela; |
67a4f2b7 AO |
2172 | htab->tlsdesc_plt = (bfd_vma) -1; |
2173 | } | |
c434dee6 AJ |
2174 | } |
2175 | else | |
2176 | h->got.offset = (bfd_vma) -1; | |
2177 | ||
c434dee6 | 2178 | if (eh->dyn_relocs == NULL) |
b34976b6 | 2179 | return TRUE; |
c434dee6 AJ |
2180 | |
2181 | /* In the shared -Bsymbolic case, discard space allocated for | |
2182 | dynamic pc-relative relocs against symbols which turn out to be | |
2183 | defined in regular objects. For the normal shared case, discard | |
2184 | space for pc-relative relocs that have become local due to symbol | |
2185 | visibility changes. */ | |
2186 | ||
2187 | if (info->shared) | |
2188 | { | |
27482721 AJ |
2189 | /* Relocs that use pc_count are those that appear on a call |
2190 | insn, or certain REL relocs that can generated via assembly. | |
2191 | We want calls to protected symbols to resolve directly to the | |
2192 | function rather than going via the plt. If people want | |
2193 | function pointer comparisons to work as expected then they | |
2194 | should avoid writing weird assembly. */ | |
2195 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 | 2196 | { |
e03a8ed8 | 2197 | struct elf_dyn_relocs **pp; |
c434dee6 AJ |
2198 | |
2199 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
2200 | { | |
2201 | p->count -= p->pc_count; | |
2202 | p->pc_count = 0; | |
2203 | if (p->count == 0) | |
2204 | *pp = p->next; | |
2205 | else | |
2206 | pp = &p->next; | |
2207 | } | |
2208 | } | |
4e795f50 AM |
2209 | |
2210 | /* Also discard relocs on undefined weak syms with non-default | |
2211 | visibility. */ | |
22d606e9 | 2212 | if (eh->dyn_relocs != NULL |
4e795f50 | 2213 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
2214 | { |
2215 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
2216 | eh->dyn_relocs = NULL; | |
2217 | ||
2218 | /* Make sure undefined weak symbols are output as a dynamic | |
2219 | symbol in PIEs. */ | |
2220 | else if (h->dynindx == -1 | |
d8045f23 NC |
2221 | && ! h->forced_local |
2222 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2223 | return FALSE; | |
22d606e9 | 2224 | } |
cbe950e9 | 2225 | |
d8045f23 | 2226 | } |
d40d037c | 2227 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
2228 | { |
2229 | /* For the non-shared case, discard space for relocs against | |
2230 | symbols which turn out to need copy relocs or are not | |
2231 | dynamic. */ | |
2232 | ||
f5385ebf AM |
2233 | if (!h->non_got_ref |
2234 | && ((h->def_dynamic | |
2235 | && !h->def_regular) | |
c434dee6 AJ |
2236 | || (htab->elf.dynamic_sections_created |
2237 | && (h->root.type == bfd_link_hash_undefweak | |
2238 | || h->root.type == bfd_link_hash_undefined)))) | |
2239 | { | |
2240 | /* Make sure this symbol is output as a dynamic symbol. | |
2241 | Undefined weak syms won't yet be marked as dynamic. */ | |
2242 | if (h->dynindx == -1 | |
d8045f23 NC |
2243 | && ! h->forced_local |
2244 | && ! bfd_elf_link_record_dynamic_symbol (info, h)) | |
2245 | return FALSE; | |
c434dee6 AJ |
2246 | |
2247 | /* If that succeeded, we know we'll be keeping all the | |
2248 | relocs. */ | |
2249 | if (h->dynindx != -1) | |
2250 | goto keep; | |
2251 | } | |
2252 | ||
2253 | eh->dyn_relocs = NULL; | |
2254 | ||
2255 | keep: ; | |
2256 | } | |
2257 | ||
2258 | /* Finally, allocate space. */ | |
2259 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
2260 | { | |
e7c33416 NC |
2261 | asection * sreloc; |
2262 | ||
cbe950e9 | 2263 | sreloc = elf_section_data (p->sec)->sreloc; |
e7c33416 NC |
2264 | |
2265 | BFD_ASSERT (sreloc != NULL); | |
2266 | ||
351f65ca | 2267 | sreloc->size += p->count * bed->s->sizeof_rela; |
c434dee6 AJ |
2268 | } |
2269 | ||
b34976b6 | 2270 | return TRUE; |
c434dee6 AJ |
2271 | } |
2272 | ||
c25bc9fc L |
2273 | /* Allocate space in .plt, .got and associated reloc sections for |
2274 | local dynamic relocs. */ | |
2275 | ||
2276 | static bfd_boolean | |
351f65ca | 2277 | elf_x86_64_allocate_local_dynrelocs (void **slot, void *inf) |
c25bc9fc L |
2278 | { |
2279 | struct elf_link_hash_entry *h | |
2280 | = (struct elf_link_hash_entry *) *slot; | |
2281 | ||
2282 | if (h->type != STT_GNU_IFUNC | |
2283 | || !h->def_regular | |
2284 | || !h->ref_regular | |
2285 | || !h->forced_local | |
2286 | || h->root.type != bfd_link_hash_defined) | |
2287 | abort (); | |
2288 | ||
351f65ca | 2289 | return elf_x86_64_allocate_dynrelocs (h, inf); |
c25bc9fc L |
2290 | } |
2291 | ||
c434dee6 AJ |
2292 | /* Find any dynamic relocs that apply to read-only sections. */ |
2293 | ||
b34976b6 | 2294 | static bfd_boolean |
351f65ca L |
2295 | elf_x86_64_readonly_dynrelocs (struct elf_link_hash_entry *h, |
2296 | void * inf) | |
c434dee6 | 2297 | { |
351f65ca | 2298 | struct elf_x86_64_link_hash_entry *eh; |
e03a8ed8 | 2299 | struct elf_dyn_relocs *p; |
c434dee6 | 2300 | |
e92d460e AM |
2301 | if (h->root.type == bfd_link_hash_warning) |
2302 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
2303 | ||
aa715242 L |
2304 | /* Skip local IFUNC symbols. */ |
2305 | if (h->forced_local && h->type == STT_GNU_IFUNC) | |
2306 | return TRUE; | |
2307 | ||
351f65ca | 2308 | eh = (struct elf_x86_64_link_hash_entry *) h; |
c434dee6 AJ |
2309 | for (p = eh->dyn_relocs; p != NULL; p = p->next) |
2310 | { | |
2311 | asection *s = p->sec->output_section; | |
2312 | ||
2313 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
2314 | { | |
2315 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
2316 | ||
2317 | info->flags |= DF_TEXTREL; | |
2318 | ||
b70321a2 L |
2319 | if (info->warn_shared_textrel && info->shared) |
2320 | info->callbacks->einfo (_("%P: %B: warning: relocation against `%s' in readonly section `%A'.\n"), | |
2321 | p->sec->owner, h->root.root.string, | |
2322 | p->sec); | |
2323 | ||
c434dee6 | 2324 | /* Not an error, just cut short the traversal. */ |
b34976b6 | 2325 | return FALSE; |
c434dee6 AJ |
2326 | } |
2327 | } | |
b34976b6 | 2328 | return TRUE; |
c434dee6 AJ |
2329 | } |
2330 | ||
70256ad8 AJ |
2331 | /* Set the sizes of the dynamic sections. */ |
2332 | ||
b34976b6 | 2333 | static bfd_boolean |
351f65ca L |
2334 | elf_x86_64_size_dynamic_sections (bfd *output_bfd, |
2335 | struct bfd_link_info *info) | |
70256ad8 | 2336 | { |
351f65ca | 2337 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
2338 | bfd *dynobj; |
2339 | asection *s; | |
b34976b6 | 2340 | bfd_boolean relocs; |
c434dee6 | 2341 | bfd *ibfd; |
351f65ca | 2342 | const struct elf_backend_data *bed; |
70256ad8 | 2343 | |
351f65ca | 2344 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2345 | if (htab == NULL) |
2346 | return FALSE; | |
351f65ca | 2347 | bed = get_elf_backend_data (output_bfd); |
4dfe6ac6 | 2348 | |
c434dee6 AJ |
2349 | dynobj = htab->elf.dynobj; |
2350 | if (dynobj == NULL) | |
2351 | abort (); | |
70256ad8 | 2352 | |
c434dee6 | 2353 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2354 | { |
2355 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 2356 | if (info->executable) |
70256ad8 AJ |
2357 | { |
2358 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
2359 | if (s == NULL) |
2360 | abort (); | |
351f65ca L |
2361 | s->size = htab->dynamic_interpreter_size; |
2362 | s->contents = (unsigned char *) htab->dynamic_interpreter; | |
70256ad8 AJ |
2363 | } |
2364 | } | |
70256ad8 | 2365 | |
c434dee6 AJ |
2366 | /* Set up .got offsets for local syms, and space for local dynamic |
2367 | relocs. */ | |
2368 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 2369 | { |
c434dee6 AJ |
2370 | bfd_signed_vma *local_got; |
2371 | bfd_signed_vma *end_local_got; | |
bffbf940 | 2372 | char *local_tls_type; |
67a4f2b7 | 2373 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
2374 | bfd_size_type locsymcount; |
2375 | Elf_Internal_Shdr *symtab_hdr; | |
2376 | asection *srel; | |
70256ad8 | 2377 | |
0ffa91dd | 2378 | if (! is_x86_64_elf (ibfd)) |
70256ad8 AJ |
2379 | continue; |
2380 | ||
c434dee6 | 2381 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 2382 | { |
e03a8ed8 | 2383 | struct elf_dyn_relocs *p; |
c434dee6 | 2384 | |
e03a8ed8 | 2385 | for (p = (struct elf_dyn_relocs *) |
e81d3500 | 2386 | (elf_section_data (s)->local_dynrel); |
c434dee6 AJ |
2387 | p != NULL; |
2388 | p = p->next) | |
70256ad8 | 2389 | { |
c434dee6 AJ |
2390 | if (!bfd_is_abs_section (p->sec) |
2391 | && bfd_is_abs_section (p->sec->output_section)) | |
2392 | { | |
2393 | /* Input section has been discarded, either because | |
2394 | it is a copy of a linkonce section or due to | |
2395 | linker script /DISCARD/, so we'll be discarding | |
2396 | the relocs too. */ | |
2397 | } | |
2398 | else if (p->count != 0) | |
2399 | { | |
2400 | srel = elf_section_data (p->sec)->sreloc; | |
351f65ca | 2401 | srel->size += p->count * bed->s->sizeof_rela; |
4b819e1f L |
2402 | if ((p->sec->output_section->flags & SEC_READONLY) != 0 |
2403 | && (info->flags & DF_TEXTREL) == 0) | |
b70321a2 L |
2404 | { |
2405 | info->flags |= DF_TEXTREL; | |
2406 | if (info->warn_shared_textrel && info->shared) | |
2407 | info->callbacks->einfo (_("%P: %B: warning: relocation in readonly section `%A'.\n"), | |
2408 | p->sec->owner, p->sec); | |
b70321a2 | 2409 | } |
c434dee6 | 2410 | } |
70256ad8 AJ |
2411 | } |
2412 | } | |
c434dee6 AJ |
2413 | |
2414 | local_got = elf_local_got_refcounts (ibfd); | |
2415 | if (!local_got) | |
2416 | continue; | |
2417 | ||
0ffa91dd | 2418 | symtab_hdr = &elf_symtab_hdr (ibfd); |
c434dee6 AJ |
2419 | locsymcount = symtab_hdr->sh_info; |
2420 | end_local_got = local_got + locsymcount; | |
351f65ca L |
2421 | local_tls_type = elf_x86_64_local_got_tls_type (ibfd); |
2422 | local_tlsdesc_gotent = elf_x86_64_local_tlsdesc_gotent (ibfd); | |
6de2ae4a L |
2423 | s = htab->elf.sgot; |
2424 | srel = htab->elf.srelgot; | |
67a4f2b7 AO |
2425 | for (; local_got < end_local_got; |
2426 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 2427 | { |
67a4f2b7 | 2428 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 2429 | if (*local_got > 0) |
70256ad8 | 2430 | { |
67a4f2b7 AO |
2431 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
2432 | { | |
6de2ae4a | 2433 | *local_tlsdesc_gotent = htab->elf.sgotplt->size |
351f65ca | 2434 | - elf_x86_64_compute_jump_table_size (htab); |
6de2ae4a | 2435 | htab->elf.sgotplt->size += 2 * GOT_ENTRY_SIZE; |
67a4f2b7 AO |
2436 | *local_got = (bfd_vma) -2; |
2437 | } | |
2438 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2439 | || GOT_TLS_GD_P (*local_tls_type)) | |
2440 | { | |
2441 | *local_got = s->size; | |
2442 | s->size += GOT_ENTRY_SIZE; | |
2443 | if (GOT_TLS_GD_P (*local_tls_type)) | |
2444 | s->size += GOT_ENTRY_SIZE; | |
2445 | } | |
bffbf940 | 2446 | if (info->shared |
67a4f2b7 | 2447 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 2448 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
2449 | { |
2450 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
2451 | { | |
6de2ae4a | 2452 | htab->elf.srelplt->size |
351f65ca | 2453 | += bed->s->sizeof_rela; |
67a4f2b7 AO |
2454 | htab->tlsdesc_plt = (bfd_vma) -1; |
2455 | } | |
2456 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
2457 | || GOT_TLS_GD_P (*local_tls_type)) | |
351f65ca | 2458 | srel->size += bed->s->sizeof_rela; |
67a4f2b7 | 2459 | } |
70256ad8 AJ |
2460 | } |
2461 | else | |
c434dee6 AJ |
2462 | *local_got = (bfd_vma) -1; |
2463 | } | |
2464 | } | |
70256ad8 | 2465 | |
bffbf940 JJ |
2466 | if (htab->tls_ld_got.refcount > 0) |
2467 | { | |
2468 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
2469 | relocs. */ | |
6de2ae4a L |
2470 | htab->tls_ld_got.offset = htab->elf.sgot->size; |
2471 | htab->elf.sgot->size += 2 * GOT_ENTRY_SIZE; | |
351f65ca | 2472 | htab->elf.srelgot->size += bed->s->sizeof_rela; |
bffbf940 JJ |
2473 | } |
2474 | else | |
2475 | htab->tls_ld_got.offset = -1; | |
2476 | ||
c434dee6 AJ |
2477 | /* Allocate global sym .plt and .got entries, and space for global |
2478 | sym dynamic relocs. */ | |
351f65ca | 2479 | elf_link_hash_traverse (&htab->elf, elf_x86_64_allocate_dynrelocs, |
eb4ff4d6 | 2480 | info); |
c434dee6 | 2481 | |
c25bc9fc L |
2482 | /* Allocate .plt and .got entries, and space for local symbols. */ |
2483 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 2484 | elf_x86_64_allocate_local_dynrelocs, |
c25bc9fc L |
2485 | info); |
2486 | ||
67a4f2b7 AO |
2487 | /* For every jump slot reserved in the sgotplt, reloc_count is |
2488 | incremented. However, when we reserve space for TLS descriptors, | |
2489 | it's not incremented, so in order to compute the space reserved | |
2490 | for them, it suffices to multiply the reloc count by the jump | |
2491 | slot size. */ | |
6de2ae4a | 2492 | if (htab->elf.srelplt) |
67a4f2b7 | 2493 | htab->sgotplt_jump_table_size |
351f65ca | 2494 | = elf_x86_64_compute_jump_table_size (htab); |
67a4f2b7 AO |
2495 | |
2496 | if (htab->tlsdesc_plt) | |
2497 | { | |
2498 | /* If we're not using lazy TLS relocations, don't generate the | |
2499 | PLT and GOT entries they require. */ | |
2500 | if ((info->flags & DF_BIND_NOW)) | |
2501 | htab->tlsdesc_plt = 0; | |
2502 | else | |
2503 | { | |
6de2ae4a L |
2504 | htab->tlsdesc_got = htab->elf.sgot->size; |
2505 | htab->elf.sgot->size += GOT_ENTRY_SIZE; | |
67a4f2b7 AO |
2506 | /* Reserve room for the initial entry. |
2507 | FIXME: we could probably do away with it in this case. */ | |
6de2ae4a L |
2508 | if (htab->elf.splt->size == 0) |
2509 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
2510 | htab->tlsdesc_plt = htab->elf.splt->size; | |
2511 | htab->elf.splt->size += PLT_ENTRY_SIZE; | |
67a4f2b7 AO |
2512 | } |
2513 | } | |
2514 | ||
a7b16ceb L |
2515 | if (htab->elf.sgotplt) |
2516 | { | |
e28df02b L |
2517 | struct elf_link_hash_entry *got; |
2518 | got = elf_link_hash_lookup (elf_hash_table (info), | |
2519 | "_GLOBAL_OFFSET_TABLE_", | |
2520 | FALSE, FALSE, FALSE); | |
2521 | ||
a7b16ceb | 2522 | /* Don't allocate .got.plt section if there are no GOT nor PLT |
e28df02b L |
2523 | entries and there is no refeence to _GLOBAL_OFFSET_TABLE_. */ |
2524 | if ((got == NULL | |
2525 | || !got->ref_regular_nonweak) | |
2526 | && (htab->elf.sgotplt->size | |
2527 | == get_elf_backend_data (output_bfd)->got_header_size) | |
a7b16ceb L |
2528 | && (htab->elf.splt == NULL |
2529 | || htab->elf.splt->size == 0) | |
2530 | && (htab->elf.sgot == NULL | |
2531 | || htab->elf.sgot->size == 0) | |
2532 | && (htab->elf.iplt == NULL | |
2533 | || htab->elf.iplt->size == 0) | |
2534 | && (htab->elf.igotplt == NULL | |
2535 | || htab->elf.igotplt->size == 0)) | |
2536 | htab->elf.sgotplt->size = 0; | |
2537 | } | |
2538 | ||
c434dee6 AJ |
2539 | /* We now have determined the sizes of the various dynamic sections. |
2540 | Allocate memory for them. */ | |
b34976b6 | 2541 | relocs = FALSE; |
c434dee6 AJ |
2542 | for (s = dynobj->sections; s != NULL; s = s->next) |
2543 | { | |
2544 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
2545 | continue; | |
2546 | ||
6de2ae4a L |
2547 | if (s == htab->elf.splt |
2548 | || s == htab->elf.sgot | |
2549 | || s == htab->elf.sgotplt | |
2550 | || s == htab->elf.iplt | |
2551 | || s == htab->elf.igotplt | |
75ff4589 | 2552 | || s == htab->sdynbss) |
c434dee6 AJ |
2553 | { |
2554 | /* Strip this section if we don't need it; see the | |
2555 | comment below. */ | |
2556 | } | |
0112cd26 | 2557 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 2558 | { |
6de2ae4a | 2559 | if (s->size != 0 && s != htab->elf.srelplt) |
b34976b6 | 2560 | relocs = TRUE; |
c434dee6 AJ |
2561 | |
2562 | /* We use the reloc_count field as a counter if we need | |
2563 | to copy relocs into the output file. */ | |
6de2ae4a | 2564 | if (s != htab->elf.srelplt) |
67a4f2b7 | 2565 | s->reloc_count = 0; |
70256ad8 | 2566 | } |
c434dee6 | 2567 | else |
70256ad8 AJ |
2568 | { |
2569 | /* It's not one of our sections, so don't allocate space. */ | |
2570 | continue; | |
2571 | } | |
2572 | ||
eea6121a | 2573 | if (s->size == 0) |
70256ad8 | 2574 | { |
c434dee6 AJ |
2575 | /* If we don't need this section, strip it from the |
2576 | output file. This is mostly to handle .rela.bss and | |
2577 | .rela.plt. We must create both sections in | |
2578 | create_dynamic_sections, because they must be created | |
2579 | before the linker maps input sections to output | |
2580 | sections. The linker does that before | |
2581 | adjust_dynamic_symbol is called, and it is that | |
2582 | function which decides whether anything needs to go | |
2583 | into these sections. */ | |
2584 | ||
8423293d | 2585 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
2586 | continue; |
2587 | } | |
2588 | ||
c456f082 AM |
2589 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
2590 | continue; | |
2591 | ||
70256ad8 AJ |
2592 | /* Allocate memory for the section contents. We use bfd_zalloc |
2593 | here in case unused entries are not reclaimed before the | |
2594 | section's contents are written out. This should not happen, | |
2595 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
2596 | of garbage. */ | |
eea6121a | 2597 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 2598 | if (s->contents == NULL) |
b34976b6 | 2599 | return FALSE; |
70256ad8 AJ |
2600 | } |
2601 | ||
c434dee6 | 2602 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
2603 | { |
2604 | /* Add some entries to the .dynamic section. We fill in the | |
351f65ca | 2605 | values later, in elf_x86_64_finish_dynamic_sections, but we |
70256ad8 | 2606 | must add the entries now so that we get the correct size for |
407443a3 | 2607 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 2608 | dynamic linker and used by the debugger. */ |
dc810e39 | 2609 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 2610 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 2611 | |
36af4a4e | 2612 | if (info->executable) |
70256ad8 | 2613 | { |
dc810e39 | 2614 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 2615 | return FALSE; |
70256ad8 AJ |
2616 | } |
2617 | ||
6de2ae4a | 2618 | if (htab->elf.splt->size != 0) |
70256ad8 | 2619 | { |
dc810e39 AM |
2620 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
2621 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
2622 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
2623 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 2624 | return FALSE; |
67a4f2b7 AO |
2625 | |
2626 | if (htab->tlsdesc_plt | |
2627 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
2628 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
2629 | return FALSE; | |
70256ad8 AJ |
2630 | } |
2631 | ||
2632 | if (relocs) | |
2633 | { | |
dc810e39 AM |
2634 | if (!add_dynamic_entry (DT_RELA, 0) |
2635 | || !add_dynamic_entry (DT_RELASZ, 0) | |
351f65ca | 2636 | || !add_dynamic_entry (DT_RELAENT, bed->s->sizeof_rela)) |
b34976b6 | 2637 | return FALSE; |
70256ad8 | 2638 | |
c434dee6 AJ |
2639 | /* If any dynamic relocs apply to a read-only section, |
2640 | then we need a DT_TEXTREL entry. */ | |
2641 | if ((info->flags & DF_TEXTREL) == 0) | |
eb4ff4d6 | 2642 | elf_link_hash_traverse (&htab->elf, |
351f65ca | 2643 | elf_x86_64_readonly_dynrelocs, |
eb4ff4d6 | 2644 | info); |
c434dee6 AJ |
2645 | |
2646 | if ((info->flags & DF_TEXTREL) != 0) | |
2647 | { | |
2648 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 2649 | return FALSE; |
c434dee6 | 2650 | } |
70256ad8 AJ |
2651 | } |
2652 | } | |
dc810e39 | 2653 | #undef add_dynamic_entry |
70256ad8 | 2654 | |
b34976b6 | 2655 | return TRUE; |
70256ad8 AJ |
2656 | } |
2657 | ||
67a4f2b7 | 2658 | static bfd_boolean |
351f65ca L |
2659 | elf_x86_64_always_size_sections (bfd *output_bfd, |
2660 | struct bfd_link_info *info) | |
67a4f2b7 AO |
2661 | { |
2662 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
2663 | ||
2664 | if (tls_sec) | |
2665 | { | |
2666 | struct elf_link_hash_entry *tlsbase; | |
2667 | ||
2668 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
2669 | "_TLS_MODULE_BASE_", | |
2670 | FALSE, FALSE, FALSE); | |
2671 | ||
2672 | if (tlsbase && tlsbase->type == STT_TLS) | |
2673 | { | |
351f65ca | 2674 | struct elf_x86_64_link_hash_table *htab; |
67a4f2b7 AO |
2675 | struct bfd_link_hash_entry *bh = NULL; |
2676 | const struct elf_backend_data *bed | |
2677 | = get_elf_backend_data (output_bfd); | |
2678 | ||
351f65ca | 2679 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2680 | if (htab == NULL) |
2681 | return FALSE; | |
2682 | ||
67a4f2b7 AO |
2683 | if (!(_bfd_generic_link_add_one_symbol |
2684 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
2685 | tls_sec, 0, NULL, FALSE, | |
2686 | bed->collect, &bh))) | |
2687 | return FALSE; | |
9f03412a | 2688 | |
4dfe6ac6 | 2689 | htab->tls_module_base = bh; |
9f03412a | 2690 | |
67a4f2b7 AO |
2691 | tlsbase = (struct elf_link_hash_entry *)bh; |
2692 | tlsbase->def_regular = 1; | |
2693 | tlsbase->other = STV_HIDDEN; | |
2694 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
2695 | } | |
2696 | } | |
2697 | ||
2698 | return TRUE; | |
2699 | } | |
2700 | ||
9f03412a AO |
2701 | /* _TLS_MODULE_BASE_ needs to be treated especially when linking |
2702 | executables. Rather than setting it to the beginning of the TLS | |
2703 | section, we have to set it to the end. This function may be called | |
2704 | multiple times, it is idempotent. */ | |
2705 | ||
2706 | static void | |
351f65ca | 2707 | elf_x86_64_set_tls_module_base (struct bfd_link_info *info) |
9f03412a | 2708 | { |
351f65ca | 2709 | struct elf_x86_64_link_hash_table *htab; |
9f03412a AO |
2710 | struct bfd_link_hash_entry *base; |
2711 | ||
2712 | if (!info->executable) | |
2713 | return; | |
2714 | ||
351f65ca | 2715 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2716 | if (htab == NULL) |
2717 | return; | |
9f03412a | 2718 | |
4dfe6ac6 NC |
2719 | base = htab->tls_module_base; |
2720 | if (base == NULL) | |
9f03412a AO |
2721 | return; |
2722 | ||
4dfe6ac6 | 2723 | base->u.def.value = htab->elf.tls_size; |
9f03412a AO |
2724 | } |
2725 | ||
bffbf940 JJ |
2726 | /* Return the base VMA address which should be subtracted from real addresses |
2727 | when resolving @dtpoff relocation. | |
2728 | This is PT_TLS segment p_vaddr. */ | |
2729 | ||
2730 | static bfd_vma | |
351f65ca | 2731 | elf_x86_64_dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 2732 | { |
e1918d23 AM |
2733 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2734 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 2735 | return 0; |
e1918d23 | 2736 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
2737 | } |
2738 | ||
2739 | /* Return the relocation value for @tpoff relocation | |
2740 | if STT_TLS virtual address is ADDRESS. */ | |
2741 | ||
2742 | static bfd_vma | |
351f65ca | 2743 | elf_x86_64_tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2744 | { |
e1918d23 | 2745 | struct elf_link_hash_table *htab = elf_hash_table (info); |
7dc98aea RO |
2746 | const struct elf_backend_data *bed = get_elf_backend_data (info->output_bfd); |
2747 | bfd_vma static_tls_size; | |
bffbf940 JJ |
2748 | |
2749 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2750 | if (htab->tls_sec == NULL) |
bffbf940 | 2751 | return 0; |
7dc98aea RO |
2752 | |
2753 | /* Consider special static TLS alignment requirements. */ | |
2754 | static_tls_size = BFD_ALIGN (htab->tls_size, bed->static_tls_alignment); | |
2755 | return address - static_tls_size - htab->tls_sec->vma; | |
bffbf940 JJ |
2756 | } |
2757 | ||
90f487df L |
2758 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2759 | branch? */ | |
2760 | ||
2761 | static bfd_boolean | |
2762 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2763 | { | |
2764 | /* Opcode Instruction | |
2765 | 0xe8 call | |
2766 | 0xe9 jump | |
2767 | 0x0f 0x8x conditional jump */ | |
2768 | return ((offset > 0 | |
2769 | && (contents [offset - 1] == 0xe8 | |
2770 | || contents [offset - 1] == 0xe9)) | |
2771 | || (offset > 1 | |
2772 | && contents [offset - 2] == 0x0f | |
2773 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2774 | } | |
2775 | ||
8d88c4ca NC |
2776 | /* Relocate an x86_64 ELF section. */ |
2777 | ||
b34976b6 | 2778 | static bfd_boolean |
351f65ca L |
2779 | elf_x86_64_relocate_section (bfd *output_bfd, |
2780 | struct bfd_link_info *info, | |
2781 | bfd *input_bfd, | |
2782 | asection *input_section, | |
2783 | bfd_byte *contents, | |
2784 | Elf_Internal_Rela *relocs, | |
2785 | Elf_Internal_Sym *local_syms, | |
2786 | asection **local_sections) | |
8d88c4ca | 2787 | { |
351f65ca | 2788 | struct elf_x86_64_link_hash_table *htab; |
8d88c4ca NC |
2789 | Elf_Internal_Shdr *symtab_hdr; |
2790 | struct elf_link_hash_entry **sym_hashes; | |
2791 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2792 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2793 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
2794 | Elf_Internal_Rela *relend; |
2795 | ||
0ffa91dd NC |
2796 | BFD_ASSERT (is_x86_64_elf (input_bfd)); |
2797 | ||
351f65ca | 2798 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
2799 | if (htab == NULL) |
2800 | return FALSE; | |
0ffa91dd | 2801 | symtab_hdr = &elf_symtab_hdr (input_bfd); |
8d88c4ca NC |
2802 | sym_hashes = elf_sym_hashes (input_bfd); |
2803 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
351f65ca | 2804 | local_tlsdesc_gotents = elf_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2805 | |
351f65ca | 2806 | elf_x86_64_set_tls_module_base (info); |
9f03412a | 2807 | |
c434dee6 | 2808 | rel = relocs; |
8d88c4ca | 2809 | relend = relocs + input_section->reloc_count; |
c434dee6 | 2810 | for (; rel < relend; rel++) |
8d88c4ca | 2811 | { |
bffbf940 | 2812 | unsigned int r_type; |
8d88c4ca NC |
2813 | reloc_howto_type *howto; |
2814 | unsigned long r_symndx; | |
2815 | struct elf_link_hash_entry *h; | |
2816 | Elf_Internal_Sym *sym; | |
2817 | asection *sec; | |
67a4f2b7 | 2818 | bfd_vma off, offplt; |
8d88c4ca | 2819 | bfd_vma relocation; |
b34976b6 | 2820 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2821 | bfd_reloc_status_type r; |
bffbf940 | 2822 | int tls_type; |
cbe950e9 | 2823 | asection *base_got; |
8d88c4ca | 2824 | |
351f65ca | 2825 | r_type = ELF32_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2826 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2827 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
2828 | continue; | |
8d88c4ca | 2829 | |
bffbf940 | 2830 | if (r_type >= R_X86_64_max) |
8da6118f KH |
2831 | { |
2832 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2833 | return FALSE; |
8da6118f | 2834 | } |
8d88c4ca | 2835 | |
b491616a | 2836 | howto = x86_64_elf_howto_table + r_type; |
351f65ca | 2837 | r_symndx = htab->r_sym (rel->r_info); |
8d88c4ca NC |
2838 | h = NULL; |
2839 | sym = NULL; | |
2840 | sec = NULL; | |
b34976b6 | 2841 | unresolved_reloc = FALSE; |
8d88c4ca | 2842 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2843 | { |
2844 | sym = local_syms + r_symndx; | |
2845 | sec = local_sections[r_symndx]; | |
c434dee6 | 2846 | |
c25bc9fc L |
2847 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, |
2848 | &sec, rel); | |
2849 | ||
2850 | /* Relocate against local STT_GNU_IFUNC symbol. */ | |
1f85278f | 2851 | if (!info->relocatable |
351f65ca | 2852 | && ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC) |
c25bc9fc | 2853 | { |
351f65ca L |
2854 | h = elf_x86_64_get_local_sym_hash (htab, input_bfd, |
2855 | rel, FALSE); | |
c25bc9fc L |
2856 | if (h == NULL) |
2857 | abort (); | |
2858 | ||
2859 | /* Set STT_GNU_IFUNC symbol value. */ | |
2860 | h->root.u.def.value = sym->st_value; | |
2861 | h->root.u.def.section = sec; | |
2862 | } | |
8da6118f | 2863 | } |
8d88c4ca | 2864 | else |
8da6118f | 2865 | { |
c9736ba0 | 2866 | bfd_boolean warned ATTRIBUTE_UNUSED; |
c434dee6 | 2867 | |
b2a8e766 AM |
2868 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2869 | r_symndx, symtab_hdr, sym_hashes, | |
2870 | h, sec, relocation, | |
2871 | unresolved_reloc, warned); | |
8da6118f | 2872 | } |
ab96bf03 AM |
2873 | |
2874 | if (sec != NULL && elf_discarded_section (sec)) | |
0672748a L |
2875 | RELOC_AGAINST_DISCARDED_SECTION (info, input_bfd, input_section, |
2876 | rel, relend, howto, contents); | |
ab96bf03 AM |
2877 | |
2878 | if (info->relocatable) | |
2879 | continue; | |
2880 | ||
cbe950e9 L |
2881 | /* Since STT_GNU_IFUNC symbol must go through PLT, we handle |
2882 | it here if it is defined in a non-shared object. */ | |
2883 | if (h != NULL | |
2884 | && h->type == STT_GNU_IFUNC | |
2885 | && h->def_regular) | |
2886 | { | |
2887 | asection *plt; | |
2888 | bfd_vma plt_index; | |
4c544807 | 2889 | const char *name; |
cbe950e9 L |
2890 | |
2891 | if ((input_section->flags & SEC_ALLOC) == 0 | |
2892 | || h->plt.offset == (bfd_vma) -1) | |
2893 | abort (); | |
2894 | ||
2895 | /* STT_GNU_IFUNC symbol must go through PLT. */ | |
6de2ae4a | 2896 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
cbe950e9 L |
2897 | relocation = (plt->output_section->vma |
2898 | + plt->output_offset + h->plt.offset); | |
2899 | ||
2900 | switch (r_type) | |
2901 | { | |
2902 | default: | |
4c544807 L |
2903 | if (h->root.root.string) |
2904 | name = h->root.root.string; | |
2905 | else | |
2906 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, sym, | |
2907 | NULL); | |
cbe950e9 L |
2908 | (*_bfd_error_handler) |
2909 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2910 | "symbol `%s' isn't handled by %s"), input_bfd, | |
2911 | x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2912 | name, __FUNCTION__); |
cbe950e9 L |
2913 | bfd_set_error (bfd_error_bad_value); |
2914 | return FALSE; | |
2915 | ||
2916 | case R_X86_64_32S: | |
710ab287 | 2917 | if (info->shared) |
cbe950e9 | 2918 | abort (); |
710ab287 L |
2919 | goto do_relocation; |
2920 | ||
248775ba L |
2921 | case R_X86_64_32: |
2922 | if (ABI_64_P (output_bfd)) | |
2923 | goto do_relocation; | |
17672001 | 2924 | /* FALLTHROUGH */ |
710ab287 L |
2925 | case R_X86_64_64: |
2926 | if (rel->r_addend != 0) | |
2927 | { | |
4c544807 L |
2928 | if (h->root.root.string) |
2929 | name = h->root.root.string; | |
2930 | else | |
2931 | name = bfd_elf_sym_name (input_bfd, symtab_hdr, | |
2932 | sym, NULL); | |
710ab287 L |
2933 | (*_bfd_error_handler) |
2934 | (_("%B: relocation %s against STT_GNU_IFUNC " | |
2935 | "symbol `%s' has non-zero addend: %d"), | |
2936 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
4c544807 | 2937 | name, rel->r_addend); |
710ab287 L |
2938 | bfd_set_error (bfd_error_bad_value); |
2939 | return FALSE; | |
2940 | } | |
2941 | ||
2942 | /* Generate dynamic relcoation only when there is a | |
2943 | non-GOF reference in a shared object. */ | |
2944 | if (info->shared && h->non_got_ref) | |
2945 | { | |
2946 | Elf_Internal_Rela outrel; | |
710ab287 L |
2947 | asection *sreloc; |
2948 | ||
c25bc9fc L |
2949 | /* Need a dynamic relocation to get the real function |
2950 | address. */ | |
710ab287 L |
2951 | outrel.r_offset = _bfd_elf_section_offset (output_bfd, |
2952 | info, | |
2953 | input_section, | |
2954 | rel->r_offset); | |
2955 | if (outrel.r_offset == (bfd_vma) -1 | |
2956 | || outrel.r_offset == (bfd_vma) -2) | |
2957 | abort (); | |
2958 | ||
2959 | outrel.r_offset += (input_section->output_section->vma | |
2960 | + input_section->output_offset); | |
2961 | ||
2962 | if (h->dynindx == -1 | |
44c4ea11 L |
2963 | || h->forced_local |
2964 | || info->executable) | |
710ab287 L |
2965 | { |
2966 | /* This symbol is resolved locally. */ | |
351f65ca | 2967 | outrel.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
710ab287 L |
2968 | outrel.r_addend = (h->root.u.def.value |
2969 | + h->root.u.def.section->output_section->vma | |
2970 | + h->root.u.def.section->output_offset); | |
2971 | } | |
2972 | else | |
2973 | { | |
351f65ca | 2974 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
710ab287 L |
2975 | outrel.r_addend = 0; |
2976 | } | |
2977 | ||
6de2ae4a | 2978 | sreloc = htab->elf.irelifunc; |
351f65ca | 2979 | elf_append_rela (output_bfd, sreloc, &outrel); |
710ab287 L |
2980 | |
2981 | /* If this reloc is against an external symbol, we | |
2982 | do not want to fiddle with the addend. Otherwise, | |
2983 | we need to include the symbol value so that it | |
2984 | becomes an addend for the dynamic reloc. For an | |
2985 | internal symbol, we have updated addend. */ | |
2986 | continue; | |
2987 | } | |
17672001 | 2988 | /* FALLTHROUGH */ |
cbe950e9 L |
2989 | case R_X86_64_PC32: |
2990 | case R_X86_64_PC64: | |
2991 | case R_X86_64_PLT32: | |
2992 | goto do_relocation; | |
2993 | ||
2994 | case R_X86_64_GOTPCREL: | |
2995 | case R_X86_64_GOTPCREL64: | |
6de2ae4a | 2996 | base_got = htab->elf.sgot; |
cbe950e9 L |
2997 | off = h->got.offset; |
2998 | ||
7afd84dc | 2999 | if (base_got == NULL) |
cbe950e9 L |
3000 | abort (); |
3001 | ||
7afd84dc | 3002 | if (off == (bfd_vma) -1) |
cbe950e9 | 3003 | { |
7afd84dc L |
3004 | /* We can't use h->got.offset here to save state, or |
3005 | even just remember the offset, as finish_dynamic_symbol | |
3006 | would use that as offset into .got. */ | |
cbe950e9 | 3007 | |
6de2ae4a | 3008 | if (htab->elf.splt != NULL) |
7afd84dc L |
3009 | { |
3010 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3011 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 3012 | base_got = htab->elf.sgotplt; |
7afd84dc | 3013 | } |
cbe950e9 L |
3014 | else |
3015 | { | |
7afd84dc L |
3016 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; |
3017 | off = plt_index * GOT_ENTRY_SIZE; | |
6de2ae4a | 3018 | base_got = htab->elf.igotplt; |
7afd84dc L |
3019 | } |
3020 | ||
3021 | if (h->dynindx == -1 | |
3022 | || h->forced_local | |
3023 | || info->symbolic) | |
3024 | { | |
3025 | /* This references the local defitionion. We must | |
3026 | initialize this entry in the global offset table. | |
3027 | Since the offset must always be a multiple of 8, | |
3028 | we use the least significant bit to record | |
3029 | whether we have initialized it already. | |
3030 | ||
3031 | When doing a dynamic link, we create a .rela.got | |
3032 | relocation entry to initialize the value. This | |
3033 | is done in the finish_dynamic_symbol routine. */ | |
3034 | if ((off & 1) != 0) | |
3035 | off &= ~1; | |
3036 | else | |
3037 | { | |
3038 | bfd_put_64 (output_bfd, relocation, | |
3039 | base_got->contents + off); | |
3040 | /* Note that this is harmless for the GOTPLT64 | |
3041 | case, as -1 | 1 still is -1. */ | |
3042 | h->got.offset |= 1; | |
3043 | } | |
cbe950e9 L |
3044 | } |
3045 | } | |
3046 | ||
3047 | relocation = (base_got->output_section->vma | |
3048 | + base_got->output_offset + off); | |
3049 | ||
cbe950e9 L |
3050 | goto do_relocation; |
3051 | } | |
3052 | } | |
3053 | ||
70256ad8 AJ |
3054 | /* When generating a shared object, the relocations handled here are |
3055 | copied into the output file to be resolved at run time. */ | |
3056 | switch (r_type) | |
3057 | { | |
3058 | case R_X86_64_GOT32: | |
7b81dfbb | 3059 | case R_X86_64_GOT64: |
70256ad8 AJ |
3060 | /* Relocation is to the entry for this symbol in the global |
3061 | offset table. */ | |
70256ad8 | 3062 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
3063 | case R_X86_64_GOTPCREL64: |
3064 | /* Use global offset table entry as symbol value. */ | |
3065 | case R_X86_64_GOTPLT64: | |
3066 | /* This is the same as GOT64 for relocation purposes, but | |
3067 | indicates the existence of a PLT entry. The difficulty is, | |
3068 | that we must calculate the GOT slot offset from the PLT | |
3069 | offset, if this symbol got a PLT entry (it was global). | |
3070 | Additionally if it's computed from the PLT entry, then that | |
3071 | GOT offset is relative to .got.plt, not to .got. */ | |
6de2ae4a | 3072 | base_got = htab->elf.sgot; |
7b81dfbb | 3073 | |
6de2ae4a | 3074 | if (htab->elf.sgot == NULL) |
c434dee6 | 3075 | abort (); |
053579d7 | 3076 | |
51e0a107 | 3077 | if (h != NULL) |
70256ad8 | 3078 | { |
b34976b6 | 3079 | bfd_boolean dyn; |
c434dee6 AJ |
3080 | |
3081 | off = h->got.offset; | |
7b81dfbb AJ |
3082 | if (h->needs_plt |
3083 | && h->plt.offset != (bfd_vma)-1 | |
3084 | && off == (bfd_vma)-1) | |
3085 | { | |
3086 | /* We can't use h->got.offset here to save | |
3087 | state, or even just remember the offset, as | |
3088 | finish_dynamic_symbol would use that as offset into | |
3089 | .got. */ | |
3090 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3091 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
6de2ae4a | 3092 | base_got = htab->elf.sgotplt; |
7b81dfbb AJ |
3093 | } |
3094 | ||
c434dee6 | 3095 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 3096 | |
27482721 | 3097 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 3098 | || (info->shared |
27482721 | 3099 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
3100 | || (ELF_ST_VISIBILITY (h->other) |
3101 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
3102 | { |
3103 | /* This is actually a static link, or it is a -Bsymbolic | |
3104 | link and the symbol is defined locally, or the symbol | |
407443a3 | 3105 | was forced to be local because of a version file. We |
51e0a107 JH |
3106 | must initialize this entry in the global offset table. |
3107 | Since the offset must always be a multiple of 8, we | |
3108 | use the least significant bit to record whether we | |
3109 | have initialized it already. | |
3110 | ||
3111 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
3112 | relocation entry to initialize the value. This is |
3113 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
3114 | if ((off & 1) != 0) |
3115 | off &= ~1; | |
3116 | else | |
3117 | { | |
3118 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
3119 | base_got->contents + off); |
3120 | /* Note that this is harmless for the GOTPLT64 case, | |
3121 | as -1 | 1 still is -1. */ | |
51e0a107 JH |
3122 | h->got.offset |= 1; |
3123 | } | |
3124 | } | |
053579d7 | 3125 | else |
b34976b6 | 3126 | unresolved_reloc = FALSE; |
70256ad8 | 3127 | } |
51e0a107 JH |
3128 | else |
3129 | { | |
c434dee6 AJ |
3130 | if (local_got_offsets == NULL) |
3131 | abort (); | |
51e0a107 JH |
3132 | |
3133 | off = local_got_offsets[r_symndx]; | |
3134 | ||
3135 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
3136 | the least significant bit to record whether we have |
3137 | already generated the necessary reloc. */ | |
51e0a107 JH |
3138 | if ((off & 1) != 0) |
3139 | off &= ~1; | |
3140 | else | |
3141 | { | |
c434dee6 | 3142 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 3143 | base_got->contents + off); |
51e0a107 JH |
3144 | |
3145 | if (info->shared) | |
3146 | { | |
947216bf | 3147 | asection *s; |
51e0a107 | 3148 | Elf_Internal_Rela outrel; |
70256ad8 | 3149 | |
51e0a107 JH |
3150 | /* We need to generate a R_X86_64_RELATIVE reloc |
3151 | for the dynamic linker. */ | |
6de2ae4a | 3152 | s = htab->elf.srelgot; |
947216bf | 3153 | if (s == NULL) |
c434dee6 | 3154 | abort (); |
51e0a107 | 3155 | |
7b81dfbb AJ |
3156 | outrel.r_offset = (base_got->output_section->vma |
3157 | + base_got->output_offset | |
51e0a107 | 3158 | + off); |
351f65ca | 3159 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
51e0a107 | 3160 | outrel.r_addend = relocation; |
351f65ca | 3161 | elf_append_rela (output_bfd, s, &outrel); |
51e0a107 JH |
3162 | } |
3163 | ||
3164 | local_got_offsets[r_symndx] |= 1; | |
3165 | } | |
51e0a107 | 3166 | } |
6a2bda3f | 3167 | |
c434dee6 AJ |
3168 | if (off >= (bfd_vma) -2) |
3169 | abort (); | |
3170 | ||
7b81dfbb AJ |
3171 | relocation = base_got->output_section->vma |
3172 | + base_got->output_offset + off; | |
3173 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
6de2ae4a L |
3174 | relocation -= htab->elf.sgotplt->output_section->vma |
3175 | - htab->elf.sgotplt->output_offset; | |
c434dee6 | 3176 | |
70256ad8 AJ |
3177 | break; |
3178 | ||
d6ab8113 JB |
3179 | case R_X86_64_GOTOFF64: |
3180 | /* Relocation is relative to the start of the global offset | |
3181 | table. */ | |
3182 | ||
3183 | /* Check to make sure it isn't a protected function symbol | |
3184 | for shared library since it may not be local when used | |
3185 | as function address. */ | |
3186 | if (info->shared | |
3187 | && h | |
3188 | && h->def_regular | |
3189 | && h->type == STT_FUNC | |
3190 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
3191 | { | |
3192 | (*_bfd_error_handler) | |
3193 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
3194 | input_bfd, h->root.root.string); | |
3195 | bfd_set_error (bfd_error_bad_value); | |
3196 | return FALSE; | |
3197 | } | |
3198 | ||
3199 | /* Note that sgot is not involved in this | |
3200 | calculation. We always want the start of .got.plt. If we | |
3201 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
3202 | permitted by the ABI, we might have to change this | |
3203 | calculation. */ | |
6de2ae4a L |
3204 | relocation -= htab->elf.sgotplt->output_section->vma |
3205 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3206 | break; |
3207 | ||
3208 | case R_X86_64_GOTPC32: | |
7b81dfbb | 3209 | case R_X86_64_GOTPC64: |
d6ab8113 | 3210 | /* Use global offset table as symbol value. */ |
6de2ae4a L |
3211 | relocation = htab->elf.sgotplt->output_section->vma |
3212 | + htab->elf.sgotplt->output_offset; | |
d6ab8113 JB |
3213 | unresolved_reloc = FALSE; |
3214 | break; | |
7b81dfbb AJ |
3215 | |
3216 | case R_X86_64_PLTOFF64: | |
3217 | /* Relocation is PLT entry relative to GOT. For local | |
3218 | symbols it's the symbol itself relative to GOT. */ | |
3219 | if (h != NULL | |
3220 | /* See PLT32 handling. */ | |
3221 | && h->plt.offset != (bfd_vma) -1 | |
6de2ae4a | 3222 | && htab->elf.splt != NULL) |
7b81dfbb | 3223 | { |
6de2ae4a L |
3224 | relocation = (htab->elf.splt->output_section->vma |
3225 | + htab->elf.splt->output_offset | |
7b81dfbb AJ |
3226 | + h->plt.offset); |
3227 | unresolved_reloc = FALSE; | |
3228 | } | |
3229 | ||
6de2ae4a L |
3230 | relocation -= htab->elf.sgotplt->output_section->vma |
3231 | + htab->elf.sgotplt->output_offset; | |
7b81dfbb | 3232 | break; |
d6ab8113 | 3233 | |
70256ad8 AJ |
3234 | case R_X86_64_PLT32: |
3235 | /* Relocation is to the entry for this symbol in the | |
3236 | procedure linkage table. */ | |
3237 | ||
3238 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 3239 | without using the procedure linkage table. */ |
70256ad8 AJ |
3240 | if (h == NULL) |
3241 | break; | |
3242 | ||
c434dee6 | 3243 | if (h->plt.offset == (bfd_vma) -1 |
6de2ae4a | 3244 | || htab->elf.splt == NULL) |
70256ad8 AJ |
3245 | { |
3246 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
3247 | happens when statically linking PIC code, or when |
3248 | using -Bsymbolic. */ | |
70256ad8 AJ |
3249 | break; |
3250 | } | |
3251 | ||
6de2ae4a L |
3252 | relocation = (htab->elf.splt->output_section->vma |
3253 | + htab->elf.splt->output_offset | |
70256ad8 | 3254 | + h->plt.offset); |
b34976b6 | 3255 | unresolved_reloc = FALSE; |
70256ad8 AJ |
3256 | break; |
3257 | ||
fd8ab9e5 AJ |
3258 | case R_X86_64_PC8: |
3259 | case R_X86_64_PC16: | |
3260 | case R_X86_64_PC32: | |
6610a52d | 3261 | if (info->shared |
351f65ca | 3262 | && ABI_64_P (output_bfd) |
ba3bee0b | 3263 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df | 3264 | && (input_section->flags & SEC_READONLY) != 0 |
41bed6dd | 3265 | && h != NULL) |
6610a52d | 3266 | { |
41bed6dd L |
3267 | bfd_boolean fail = FALSE; |
3268 | bfd_boolean branch | |
3269 | = (r_type == R_X86_64_PC32 | |
3270 | && is_32bit_relative_branch (contents, rel->r_offset)); | |
3271 | ||
3272 | if (SYMBOL_REFERENCES_LOCAL (info, h)) | |
3273 | { | |
3274 | /* Symbol is referenced locally. Make sure it is | |
3275 | defined locally or for a branch. */ | |
3276 | fail = !h->def_regular && !branch; | |
3277 | } | |
90f487df | 3278 | else |
41bed6dd L |
3279 | { |
3280 | /* Symbol isn't referenced locally. We only allow | |
3281 | branch to symbol with non-default visibility. */ | |
3282 | fail = (!branch | |
3283 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT); | |
3284 | } | |
3285 | ||
3286 | if (fail) | |
3287 | { | |
3288 | const char *fmt; | |
3289 | const char *v; | |
3290 | const char *pic = ""; | |
3291 | ||
3292 | switch (ELF_ST_VISIBILITY (h->other)) | |
3293 | { | |
3294 | case STV_HIDDEN: | |
3295 | v = _("hidden symbol"); | |
3296 | break; | |
3297 | case STV_INTERNAL: | |
3298 | v = _("internal symbol"); | |
3299 | break; | |
3300 | case STV_PROTECTED: | |
3301 | v = _("protected symbol"); | |
3302 | break; | |
3303 | default: | |
3304 | v = _("symbol"); | |
3305 | pic = _("; recompile with -fPIC"); | |
3306 | break; | |
3307 | } | |
3308 | ||
3309 | if (h->def_regular) | |
3310 | fmt = _("%B: relocation %s against %s `%s' can not be used when making a shared object%s"); | |
3311 | else | |
3312 | fmt = _("%B: relocation %s against undefined %s `%s' can not be used when making a shared object%s"); | |
3313 | ||
3314 | (*_bfd_error_handler) (fmt, input_bfd, | |
3315 | x86_64_elf_howto_table[r_type].name, | |
3316 | v, h->root.root.string, pic); | |
3317 | bfd_set_error (bfd_error_bad_value); | |
3318 | return FALSE; | |
3319 | } | |
6610a52d L |
3320 | } |
3321 | /* Fall through. */ | |
3322 | ||
70256ad8 AJ |
3323 | case R_X86_64_8: |
3324 | case R_X86_64_16: | |
3325 | case R_X86_64_32: | |
d6ab8113 | 3326 | case R_X86_64_PC64: |
6b3db546 | 3327 | case R_X86_64_64: |
80643fbc | 3328 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 3329 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 3330 | |
b1e24c02 | 3331 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
3332 | break; |
3333 | ||
3334 | if ((info->shared | |
4bc6e03a AJ |
3335 | && (h == NULL |
3336 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
3337 | || h->root.type != bfd_link_hash_undefweak) | |
d8045f23 NC |
3338 | && (! IS_X86_64_PCREL_TYPE (r_type) |
3339 | || ! SYMBOL_CALLS_LOCAL (info, h))) | |
d40d037c AJ |
3340 | || (ELIMINATE_COPY_RELOCS |
3341 | && !info->shared | |
c434dee6 AJ |
3342 | && h != NULL |
3343 | && h->dynindx != -1 | |
f5385ebf AM |
3344 | && !h->non_got_ref |
3345 | && ((h->def_dynamic | |
3346 | && !h->def_regular) | |
c434dee6 | 3347 | || h->root.type == bfd_link_hash_undefweak |
0f88be7a | 3348 | || h->root.type == bfd_link_hash_undefined))) |
70256ad8 AJ |
3349 | { |
3350 | Elf_Internal_Rela outrel; | |
b34976b6 | 3351 | bfd_boolean skip, relocate; |
c434dee6 | 3352 | asection *sreloc; |
70256ad8 AJ |
3353 | |
3354 | /* When generating a shared object, these relocations | |
3355 | are copied into the output file to be resolved at run | |
407443a3 | 3356 | time. */ |
b34976b6 AM |
3357 | skip = FALSE; |
3358 | relocate = FALSE; | |
70256ad8 | 3359 | |
c629eae0 JJ |
3360 | outrel.r_offset = |
3361 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 3362 | rel->r_offset); |
c629eae0 | 3363 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 3364 | skip = TRUE; |
0fb19cbc | 3365 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 3366 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
3367 | |
3368 | outrel.r_offset += (input_section->output_section->vma | |
3369 | + input_section->output_offset); | |
3370 | ||
3371 | if (skip) | |
0bb2d96a | 3372 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 3373 | |
fd8ab9e5 AJ |
3374 | /* h->dynindx may be -1 if this symbol was marked to |
3375 | become local. */ | |
3376 | else if (h != NULL | |
c434dee6 | 3377 | && h->dynindx != -1 |
d8045f23 NC |
3378 | && (IS_X86_64_PCREL_TYPE (r_type) |
3379 | || ! info->shared | |
3380 | || ! SYMBOLIC_BIND (info, h) | |
3381 | || ! h->def_regular)) | |
70256ad8 | 3382 | { |
351f65ca | 3383 | outrel.r_info = htab->r_info (h->dynindx, r_type); |
c434dee6 | 3384 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
3385 | } |
3386 | else | |
3387 | { | |
c434dee6 | 3388 | /* This symbol is local, or marked to become local. */ |
248775ba | 3389 | if (r_type == htab->pointer_r_type) |
607c0e09 | 3390 | { |
b34976b6 | 3391 | relocate = TRUE; |
351f65ca | 3392 | outrel.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
607c0e09 AS |
3393 | outrel.r_addend = relocation + rel->r_addend; |
3394 | } | |
3395 | else | |
3396 | { | |
3397 | long sindx; | |
3398 | ||
8517fae7 | 3399 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
3400 | sindx = 0; |
3401 | else if (sec == NULL || sec->owner == NULL) | |
3402 | { | |
3403 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 3404 | return FALSE; |
607c0e09 AS |
3405 | } |
3406 | else | |
3407 | { | |
3408 | asection *osec; | |
3409 | ||
74541ad4 AM |
3410 | /* We are turning this relocation into one |
3411 | against a section symbol. It would be | |
3412 | proper to subtract the symbol's value, | |
3413 | osec->vma, from the emitted reloc addend, | |
3414 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
3415 | osec = sec->output_section; |
3416 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
3417 | if (sindx == 0) |
3418 | { | |
3419 | asection *oi = htab->elf.text_index_section; | |
3420 | sindx = elf_section_data (oi)->dynindx; | |
3421 | } | |
3422 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
3423 | } |
3424 | ||
351f65ca | 3425 | outrel.r_info = htab->r_info (sindx, r_type); |
607c0e09 AS |
3426 | outrel.r_addend = relocation + rel->r_addend; |
3427 | } | |
70256ad8 AJ |
3428 | } |
3429 | ||
cbe950e9 | 3430 | sreloc = elf_section_data (input_section)->sreloc; |
d8045f23 | 3431 | |
62d78908 L |
3432 | if (sreloc == NULL || sreloc->contents == NULL) |
3433 | { | |
3434 | r = bfd_reloc_notsupported; | |
3435 | goto check_relocation_error; | |
3436 | } | |
c434dee6 | 3437 | |
351f65ca | 3438 | elf_append_rela (output_bfd, sreloc, &outrel); |
70256ad8 AJ |
3439 | |
3440 | /* If this reloc is against an external symbol, we do | |
3441 | not want to fiddle with the addend. Otherwise, we | |
3442 | need to include the symbol value so that it becomes | |
3443 | an addend for the dynamic reloc. */ | |
0f88be7a | 3444 | if (! relocate) |
70256ad8 AJ |
3445 | continue; |
3446 | } | |
3447 | ||
3448 | break; | |
3449 | ||
bffbf940 | 3450 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
3451 | case R_X86_64_GOTPC32_TLSDESC: |
3452 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 3453 | case R_X86_64_GOTTPOFF: |
bffbf940 JJ |
3454 | tls_type = GOT_UNKNOWN; |
3455 | if (h == NULL && local_got_offsets) | |
351f65ca | 3456 | tls_type = elf_x86_64_local_got_tls_type (input_bfd) [r_symndx]; |
bffbf940 | 3457 | else if (h != NULL) |
351f65ca | 3458 | tls_type = elf_x86_64_hash_entry (h)->tls_type; |
142411ca | 3459 | |
351f65ca L |
3460 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3461 | input_section, contents, | |
3462 | symtab_hdr, sym_hashes, | |
3463 | &r_type, tls_type, rel, | |
3464 | relend, h, r_symndx)) | |
534a31f6 | 3465 | return FALSE; |
bffbf940 JJ |
3466 | |
3467 | if (r_type == R_X86_64_TPOFF32) | |
3468 | { | |
142411ca L |
3469 | bfd_vma roff = rel->r_offset; |
3470 | ||
bffbf940 | 3471 | BFD_ASSERT (! unresolved_reloc); |
142411ca | 3472 | |
351f65ca | 3473 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 | 3474 | { |
52bc799a | 3475 | /* GD->LE transition. For 64bit, change |
abcf1d52 | 3476 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 3477 | .word 0x6666; rex64; call __tls_get_addr |
52bc799a | 3478 | into: |
bffbf940 | 3479 | movq %fs:0, %rax |
52bc799a L |
3480 | leaq foo@tpoff(%rax), %rax |
3481 | For 32bit, change | |
3482 | leaq foo@tlsgd(%rip), %rdi | |
3483 | .word 0x6666; rex64; call __tls_get_addr | |
3484 | into: | |
3485 | movl %fs:0, %eax | |
bffbf940 | 3486 | leaq foo@tpoff(%rax), %rax */ |
52bc799a L |
3487 | if (ABI_64_P (output_bfd)) |
3488 | memcpy (contents + roff - 4, | |
3489 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3490 | 16); | |
3491 | else | |
3492 | memcpy (contents + roff - 3, | |
3493 | "\x64\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", | |
3494 | 15); | |
eb4ff4d6 | 3495 | bfd_put_32 (output_bfd, |
351f65ca | 3496 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3497 | contents + roff + 8); |
a3fadc9a | 3498 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3499 | rel++; |
3500 | continue; | |
3501 | } | |
351f65ca | 3502 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
67a4f2b7 AO |
3503 | { |
3504 | /* GDesc -> LE transition. | |
3505 | It's originally something like: | |
3506 | leaq x@tlsdesc(%rip), %rax | |
3507 | ||
3508 | Change it to: | |
c9736ba0 | 3509 | movl $x@tpoff, %rax. */ |
67a4f2b7 | 3510 | |
c9736ba0 | 3511 | unsigned int val, type; |
67a4f2b7 | 3512 | |
67a4f2b7 | 3513 | type = bfd_get_8 (input_bfd, contents + roff - 3); |
67a4f2b7 | 3514 | val = bfd_get_8 (input_bfd, contents + roff - 1); |
67a4f2b7 AO |
3515 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), |
3516 | contents + roff - 3); | |
3517 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
3518 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
3519 | contents + roff - 1); | |
eb4ff4d6 | 3520 | bfd_put_32 (output_bfd, |
351f65ca | 3521 | elf_x86_64_tpoff (info, relocation), |
67a4f2b7 AO |
3522 | contents + roff); |
3523 | continue; | |
3524 | } | |
351f65ca | 3525 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
67a4f2b7 AO |
3526 | { |
3527 | /* GDesc -> LE transition. | |
3528 | It's originally: | |
3529 | call *(%rax) | |
3530 | Turn it into: | |
142411ca | 3531 | xchg %ax,%ax. */ |
10efb593 | 3532 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
67a4f2b7 AO |
3533 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
3534 | continue; | |
3535 | } | |
351f65ca | 3536 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTTPOFF) |
bffbf940 | 3537 | { |
bffbf940 JJ |
3538 | /* IE->LE transition: |
3539 | Originally it can be one of: | |
3540 | movq foo@gottpoff(%rip), %reg | |
3541 | addq foo@gottpoff(%rip), %reg | |
3542 | We change it into: | |
3543 | movq $foo, %reg | |
3544 | leaq foo(%reg), %reg | |
3545 | addq $foo, %reg. */ | |
142411ca L |
3546 | |
3547 | unsigned int val, type, reg; | |
3548 | ||
3549 | val = bfd_get_8 (input_bfd, contents + roff - 3); | |
3550 | type = bfd_get_8 (input_bfd, contents + roff - 2); | |
3551 | reg = bfd_get_8 (input_bfd, contents + roff - 1); | |
bffbf940 | 3552 | reg >>= 3; |
bffbf940 JJ |
3553 | if (type == 0x8b) |
3554 | { | |
3555 | /* movq */ | |
3556 | if (val == 0x4c) | |
3557 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3558 | contents + roff - 3); |
4a4c5f25 L |
3559 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3560 | bfd_put_8 (output_bfd, 0x41, | |
3561 | contents + roff - 3); | |
bffbf940 | 3562 | bfd_put_8 (output_bfd, 0xc7, |
142411ca | 3563 | contents + roff - 2); |
bffbf940 | 3564 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3565 | contents + roff - 1); |
bffbf940 JJ |
3566 | } |
3567 | else if (reg == 4) | |
3568 | { | |
3569 | /* addq -> addq - addressing with %rsp/%r12 is | |
3570 | special */ | |
3571 | if (val == 0x4c) | |
3572 | bfd_put_8 (output_bfd, 0x49, | |
142411ca | 3573 | contents + roff - 3); |
4a4c5f25 L |
3574 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3575 | bfd_put_8 (output_bfd, 0x41, | |
3576 | contents + roff - 3); | |
bffbf940 | 3577 | bfd_put_8 (output_bfd, 0x81, |
142411ca | 3578 | contents + roff - 2); |
bffbf940 | 3579 | bfd_put_8 (output_bfd, 0xc0 | reg, |
142411ca | 3580 | contents + roff - 1); |
bffbf940 JJ |
3581 | } |
3582 | else | |
3583 | { | |
3584 | /* addq -> leaq */ | |
3585 | if (val == 0x4c) | |
3586 | bfd_put_8 (output_bfd, 0x4d, | |
142411ca | 3587 | contents + roff - 3); |
4a4c5f25 L |
3588 | else if (!ABI_64_P (output_bfd) && val == 0x44) |
3589 | bfd_put_8 (output_bfd, 0x45, | |
3590 | contents + roff - 3); | |
bffbf940 | 3591 | bfd_put_8 (output_bfd, 0x8d, |
142411ca | 3592 | contents + roff - 2); |
bffbf940 | 3593 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), |
142411ca | 3594 | contents + roff - 1); |
bffbf940 | 3595 | } |
eb4ff4d6 | 3596 | bfd_put_32 (output_bfd, |
351f65ca | 3597 | elf_x86_64_tpoff (info, relocation), |
142411ca | 3598 | contents + roff); |
bffbf940 JJ |
3599 | continue; |
3600 | } | |
142411ca L |
3601 | else |
3602 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
3603 | } |
3604 | ||
6de2ae4a | 3605 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3606 | abort (); |
3607 | ||
3608 | if (h != NULL) | |
67a4f2b7 AO |
3609 | { |
3610 | off = h->got.offset; | |
351f65ca | 3611 | offplt = elf_x86_64_hash_entry (h)->tlsdesc_got; |
67a4f2b7 | 3612 | } |
bffbf940 JJ |
3613 | else |
3614 | { | |
3615 | if (local_got_offsets == NULL) | |
3616 | abort (); | |
3617 | ||
3618 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 3619 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
3620 | } |
3621 | ||
3622 | if ((off & 1) != 0) | |
3623 | off &= ~1; | |
26e41594 | 3624 | else |
bffbf940 JJ |
3625 | { |
3626 | Elf_Internal_Rela outrel; | |
bffbf940 | 3627 | int dr_type, indx; |
67a4f2b7 | 3628 | asection *sreloc; |
bffbf940 | 3629 | |
6de2ae4a | 3630 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3631 | abort (); |
3632 | ||
67a4f2b7 AO |
3633 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
3634 | ||
3635 | if (GOT_TLS_GDESC_P (tls_type)) | |
3636 | { | |
351f65ca | 3637 | outrel.r_info = htab->r_info (indx, R_X86_64_TLSDESC); |
67a4f2b7 | 3638 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt |
6de2ae4a L |
3639 | + 2 * GOT_ENTRY_SIZE <= htab->elf.sgotplt->size); |
3640 | outrel.r_offset = (htab->elf.sgotplt->output_section->vma | |
3641 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3642 | + offplt |
3643 | + htab->sgotplt_jump_table_size); | |
6de2ae4a | 3644 | sreloc = htab->elf.srelplt; |
67a4f2b7 | 3645 | if (indx == 0) |
351f65ca | 3646 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
67a4f2b7 AO |
3647 | else |
3648 | outrel.r_addend = 0; | |
351f65ca | 3649 | elf_append_rela (output_bfd, sreloc, &outrel); |
67a4f2b7 AO |
3650 | } |
3651 | ||
6de2ae4a | 3652 | sreloc = htab->elf.srelgot; |
67a4f2b7 | 3653 | |
6de2ae4a L |
3654 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3655 | + htab->elf.sgot->output_offset + off); | |
bffbf940 | 3656 | |
67a4f2b7 | 3657 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 3658 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
3659 | else if (GOT_TLS_GDESC_P (tls_type)) |
3660 | goto dr_done; | |
bffbf940 JJ |
3661 | else |
3662 | dr_type = R_X86_64_TPOFF64; | |
3663 | ||
6de2ae4a | 3664 | bfd_put_64 (output_bfd, 0, htab->elf.sgot->contents + off); |
bffbf940 | 3665 | outrel.r_addend = 0; |
67a4f2b7 AO |
3666 | if ((dr_type == R_X86_64_TPOFF64 |
3667 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
351f65ca L |
3668 | outrel.r_addend = relocation - elf_x86_64_dtpoff_base (info); |
3669 | outrel.r_info = htab->r_info (indx, dr_type); | |
bffbf940 | 3670 | |
351f65ca | 3671 | elf_append_rela (output_bfd, sreloc, &outrel); |
bffbf940 | 3672 | |
67a4f2b7 | 3673 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
3674 | { |
3675 | if (indx == 0) | |
3676 | { | |
d40d037c | 3677 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 | 3678 | bfd_put_64 (output_bfd, |
351f65ca | 3679 | relocation - elf_x86_64_dtpoff_base (info), |
6de2ae4a | 3680 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
bffbf940 JJ |
3681 | } |
3682 | else | |
3683 | { | |
3684 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3685 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3686 | outrel.r_info = htab->r_info (indx, |
bffbf940 JJ |
3687 | R_X86_64_DTPOFF64); |
3688 | outrel.r_offset += GOT_ENTRY_SIZE; | |
351f65ca | 3689 | elf_append_rela (output_bfd, sreloc, |
464d3bd4 | 3690 | &outrel); |
bffbf940 JJ |
3691 | } |
3692 | } | |
3693 | ||
67a4f2b7 | 3694 | dr_done: |
bffbf940 JJ |
3695 | if (h != NULL) |
3696 | h->got.offset |= 1; | |
3697 | else | |
3698 | local_got_offsets[r_symndx] |= 1; | |
3699 | } | |
3700 | ||
67a4f2b7 AO |
3701 | if (off >= (bfd_vma) -2 |
3702 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 | 3703 | abort (); |
351f65ca | 3704 | if (r_type == ELF32_R_TYPE (rel->r_info)) |
bffbf940 | 3705 | { |
67a4f2b7 AO |
3706 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
3707 | || r_type == R_X86_64_TLSDESC_CALL) | |
6de2ae4a L |
3708 | relocation = htab->elf.sgotplt->output_section->vma |
3709 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 AO |
3710 | + offplt + htab->sgotplt_jump_table_size; |
3711 | else | |
6de2ae4a L |
3712 | relocation = htab->elf.sgot->output_section->vma |
3713 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3714 | unresolved_reloc = FALSE; |
bffbf940 | 3715 | } |
142411ca | 3716 | else |
67a4f2b7 | 3717 | { |
142411ca | 3718 | bfd_vma roff = rel->r_offset; |
67a4f2b7 | 3719 | |
351f65ca | 3720 | if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
142411ca | 3721 | { |
52bc799a | 3722 | /* GD->IE transition. For 64bit, change |
142411ca L |
3723 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
3724 | .word 0x6666; rex64; call __tls_get_addr@plt | |
52bc799a | 3725 | into: |
142411ca | 3726 | movq %fs:0, %rax |
52bc799a L |
3727 | addq foo@gottpoff(%rip), %rax |
3728 | For 32bit, change | |
3729 | leaq foo@tlsgd(%rip), %rdi | |
3730 | .word 0x6666; rex64; call __tls_get_addr@plt | |
3731 | into: | |
3732 | movl %fs:0, %eax | |
142411ca | 3733 | addq foo@gottpoff(%rip), %rax */ |
52bc799a L |
3734 | if (ABI_64_P (output_bfd)) |
3735 | memcpy (contents + roff - 4, | |
3736 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3737 | 16); | |
3738 | else | |
3739 | memcpy (contents + roff - 3, | |
3740 | "\x64\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", | |
3741 | 15); | |
142411ca | 3742 | |
6de2ae4a L |
3743 | relocation = (htab->elf.sgot->output_section->vma |
3744 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3745 | - roff |
3746 | - input_section->output_section->vma | |
3747 | - input_section->output_offset | |
3748 | - 12); | |
3749 | bfd_put_32 (output_bfd, relocation, | |
3750 | contents + roff + 8); | |
3751 | /* Skip R_X86_64_PLT32. */ | |
3752 | rel++; | |
3753 | continue; | |
3754 | } | |
351f65ca | 3755 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
142411ca L |
3756 | { |
3757 | /* GDesc -> IE transition. | |
3758 | It's originally something like: | |
3759 | leaq x@tlsdesc(%rip), %rax | |
67a4f2b7 | 3760 | |
142411ca | 3761 | Change it to: |
c9736ba0 | 3762 | movq x@gottpoff(%rip), %rax # before xchg %ax,%ax. */ |
67a4f2b7 | 3763 | |
142411ca L |
3764 | /* Now modify the instruction as appropriate. To |
3765 | turn a leaq into a movq in the form we use it, it | |
3766 | suffices to change the second byte from 0x8d to | |
3767 | 0x8b. */ | |
3768 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
3769 | ||
3770 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
3771 | htab->elf.sgot->output_section->vma |
3772 | + htab->elf.sgot->output_offset + off | |
142411ca L |
3773 | - rel->r_offset |
3774 | - input_section->output_section->vma | |
3775 | - input_section->output_offset | |
3776 | - 4, | |
3777 | contents + roff); | |
3778 | continue; | |
3779 | } | |
351f65ca | 3780 | else if (ELF32_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) |
142411ca L |
3781 | { |
3782 | /* GDesc -> IE transition. | |
3783 | It's originally: | |
3784 | call *(%rax) | |
3785 | ||
3786 | Change it to: | |
c9736ba0 | 3787 | xchg %ax, %ax. */ |
142411ca | 3788 | |
142411ca L |
3789 | bfd_put_8 (output_bfd, 0x66, contents + roff); |
3790 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); | |
3791 | continue; | |
3792 | } | |
3793 | else | |
3794 | BFD_ASSERT (FALSE); | |
67a4f2b7 | 3795 | } |
bffbf940 JJ |
3796 | break; |
3797 | ||
3798 | case R_X86_64_TLSLD: | |
351f65ca L |
3799 | if (! elf_x86_64_tls_transition (info, input_bfd, |
3800 | input_section, contents, | |
3801 | symtab_hdr, sym_hashes, | |
3802 | &r_type, GOT_UNKNOWN, | |
3803 | rel, relend, h, r_symndx)) | |
142411ca | 3804 | return FALSE; |
a3fadc9a | 3805 | |
142411ca L |
3806 | if (r_type != R_X86_64_TLSLD) |
3807 | { | |
bffbf940 | 3808 | /* LD->LE transition: |
a3fadc9a | 3809 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
52bc799a L |
3810 | For 64bit, we change it into: |
3811 | .word 0x6666; .byte 0x66; movq %fs:0, %rax. | |
3812 | For 32bit, we change it into: | |
3813 | nopl 0x0(%rax); movl %fs:0, %eax. */ | |
142411ca L |
3814 | |
3815 | BFD_ASSERT (r_type == R_X86_64_TPOFF32); | |
52bc799a L |
3816 | if (ABI_64_P (output_bfd)) |
3817 | memcpy (contents + rel->r_offset - 3, | |
3818 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
3819 | else | |
3820 | memcpy (contents + rel->r_offset - 3, | |
3821 | "\x0f\x1f\x40\x00\x64\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 3822 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
3823 | rel++; |
3824 | continue; | |
3825 | } | |
3826 | ||
6de2ae4a | 3827 | if (htab->elf.sgot == NULL) |
bffbf940 JJ |
3828 | abort (); |
3829 | ||
3830 | off = htab->tls_ld_got.offset; | |
3831 | if (off & 1) | |
3832 | off &= ~1; | |
3833 | else | |
3834 | { | |
3835 | Elf_Internal_Rela outrel; | |
bffbf940 | 3836 | |
6de2ae4a | 3837 | if (htab->elf.srelgot == NULL) |
bffbf940 JJ |
3838 | abort (); |
3839 | ||
6de2ae4a L |
3840 | outrel.r_offset = (htab->elf.sgot->output_section->vma |
3841 | + htab->elf.sgot->output_offset + off); | |
bffbf940 JJ |
3842 | |
3843 | bfd_put_64 (output_bfd, 0, | |
6de2ae4a | 3844 | htab->elf.sgot->contents + off); |
bffbf940 | 3845 | bfd_put_64 (output_bfd, 0, |
6de2ae4a | 3846 | htab->elf.sgot->contents + off + GOT_ENTRY_SIZE); |
351f65ca | 3847 | outrel.r_info = htab->r_info (0, R_X86_64_DTPMOD64); |
bffbf940 | 3848 | outrel.r_addend = 0; |
351f65ca | 3849 | elf_append_rela (output_bfd, htab->elf.srelgot, |
464d3bd4 | 3850 | &outrel); |
bffbf940 JJ |
3851 | htab->tls_ld_got.offset |= 1; |
3852 | } | |
6de2ae4a L |
3853 | relocation = htab->elf.sgot->output_section->vma |
3854 | + htab->elf.sgot->output_offset + off; | |
b34976b6 | 3855 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3856 | break; |
3857 | ||
3858 | case R_X86_64_DTPOFF32: | |
1d85728f | 3859 | if (!info->executable|| (input_section->flags & SEC_CODE) == 0) |
351f65ca | 3860 | relocation -= elf_x86_64_dtpoff_base (info); |
bffbf940 | 3861 | else |
351f65ca | 3862 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3863 | break; |
3864 | ||
3865 | case R_X86_64_TPOFF32: | |
6769d501 | 3866 | case R_X86_64_TPOFF64: |
9b769489 | 3867 | BFD_ASSERT (info->executable); |
351f65ca | 3868 | relocation = elf_x86_64_tpoff (info, relocation); |
bffbf940 JJ |
3869 | break; |
3870 | ||
70256ad8 AJ |
3871 | default: |
3872 | break; | |
3873 | } | |
8d88c4ca | 3874 | |
239e1f3a AM |
3875 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3876 | because such sections are not SEC_ALLOC and thus ld.so will | |
3877 | not process them. */ | |
c434dee6 | 3878 | if (unresolved_reloc |
239e1f3a | 3879 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3880 | && h->def_dynamic)) |
c434dee6 | 3881 | (*_bfd_error_handler) |
843fe662 | 3882 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3883 | input_bfd, |
3884 | input_section, | |
c434dee6 | 3885 | (long) rel->r_offset, |
843fe662 | 3886 | howto->name, |
c434dee6 AJ |
3887 | h->root.root.string); |
3888 | ||
cbe950e9 | 3889 | do_relocation: |
8d88c4ca | 3890 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3891 | contents, rel->r_offset, |
3892 | relocation, rel->r_addend); | |
8d88c4ca | 3893 | |
62d78908 | 3894 | check_relocation_error: |
8d88c4ca | 3895 | if (r != bfd_reloc_ok) |
8da6118f | 3896 | { |
c434dee6 AJ |
3897 | const char *name; |
3898 | ||
3899 | if (h != NULL) | |
3900 | name = h->root.root.string; | |
3901 | else | |
8da6118f | 3902 | { |
c434dee6 AJ |
3903 | name = bfd_elf_string_from_elf_section (input_bfd, |
3904 | symtab_hdr->sh_link, | |
3905 | sym->st_name); | |
3906 | if (name == NULL) | |
b34976b6 | 3907 | return FALSE; |
c434dee6 AJ |
3908 | if (*name == '\0') |
3909 | name = bfd_section_name (input_bfd, sec); | |
3910 | } | |
3911 | ||
3912 | if (r == bfd_reloc_overflow) | |
3913 | { | |
c434dee6 | 3914 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3915 | (info, (h ? &h->root : NULL), name, howto->name, |
3916 | (bfd_vma) 0, input_bfd, input_section, | |
3917 | rel->r_offset))) | |
b34976b6 | 3918 | return FALSE; |
c434dee6 AJ |
3919 | } |
3920 | else | |
3921 | { | |
3922 | (*_bfd_error_handler) | |
bb95161d | 3923 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
d003868e | 3924 | input_bfd, input_section, |
c434dee6 | 3925 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3926 | return FALSE; |
8da6118f KH |
3927 | } |
3928 | } | |
8d88c4ca | 3929 | } |
70256ad8 | 3930 | |
b34976b6 | 3931 | return TRUE; |
70256ad8 AJ |
3932 | } |
3933 | ||
3934 | /* Finish up dynamic symbol handling. We set the contents of various | |
3935 | dynamic sections here. */ | |
3936 | ||
b34976b6 | 3937 | static bfd_boolean |
351f65ca L |
3938 | elf_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3939 | struct bfd_link_info *info, | |
3940 | struct elf_link_hash_entry *h, | |
3941 | Elf_Internal_Sym *sym) | |
70256ad8 | 3942 | { |
351f65ca | 3943 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 | 3944 | |
351f65ca | 3945 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
3946 | if (htab == NULL) |
3947 | return FALSE; | |
70256ad8 AJ |
3948 | |
3949 | if (h->plt.offset != (bfd_vma) -1) | |
3950 | { | |
70256ad8 AJ |
3951 | bfd_vma plt_index; |
3952 | bfd_vma got_offset; | |
3953 | Elf_Internal_Rela rela; | |
947216bf | 3954 | bfd_byte *loc; |
cbe950e9 | 3955 | asection *plt, *gotplt, *relplt; |
351f65ca | 3956 | const struct elf_backend_data *bed; |
cbe950e9 L |
3957 | |
3958 | /* When building a static executable, use .iplt, .igot.plt and | |
3959 | .rela.iplt sections for STT_GNU_IFUNC symbols. */ | |
6de2ae4a | 3960 | if (htab->elf.splt != NULL) |
cbe950e9 | 3961 | { |
6de2ae4a L |
3962 | plt = htab->elf.splt; |
3963 | gotplt = htab->elf.sgotplt; | |
3964 | relplt = htab->elf.srelplt; | |
cbe950e9 L |
3965 | } |
3966 | else | |
3967 | { | |
6de2ae4a L |
3968 | plt = htab->elf.iplt; |
3969 | gotplt = htab->elf.igotplt; | |
3970 | relplt = htab->elf.irelplt; | |
cbe950e9 | 3971 | } |
70256ad8 AJ |
3972 | |
3973 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 3974 | it up. */ |
cbe950e9 L |
3975 | if ((h->dynindx == -1 |
3976 | && !((h->forced_local || info->executable) | |
3977 | && h->def_regular | |
3978 | && h->type == STT_GNU_IFUNC)) | |
3979 | || plt == NULL | |
3980 | || gotplt == NULL | |
3981 | || relplt == NULL) | |
f6df62c8 | 3982 | return FALSE; |
70256ad8 AJ |
3983 | |
3984 | /* Get the index in the procedure linkage table which | |
3985 | corresponds to this symbol. This is the index of this symbol | |
3986 | in all the symbols for which we are making plt entries. The | |
cbe950e9 | 3987 | first entry in the procedure linkage table is reserved. |
6bbec505 | 3988 | |
cbe950e9 | 3989 | Get the offset into the .got table of the entry that |
407443a3 | 3990 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
cbe950e9 L |
3991 | bytes. The first three are reserved for the dynamic linker. |
3992 | ||
3993 | For static executables, we don't reserve anything. */ | |
3994 | ||
6de2ae4a | 3995 | if (plt == htab->elf.splt) |
cbe950e9 L |
3996 | { |
3997 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3998 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; | |
3999 | } | |
4000 | else | |
4001 | { | |
4002 | plt_index = h->plt.offset / PLT_ENTRY_SIZE; | |
4003 | got_offset = plt_index * GOT_ENTRY_SIZE; | |
4004 | } | |
70256ad8 AJ |
4005 | |
4006 | /* Fill in the entry in the procedure linkage table. */ | |
351f65ca | 4007 | memcpy (plt->contents + h->plt.offset, elf_x86_64_plt_entry, |
70256ad8 AJ |
4008 | PLT_ENTRY_SIZE); |
4009 | ||
4010 | /* Insert the relocation positions of the plt section. The magic | |
4011 | numbers at the end of the statements are the positions of the | |
4012 | relocations in the plt section. */ | |
653165cc AJ |
4013 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
4014 | instruction uses 6 bytes, subtract this value. */ | |
4015 | bfd_put_32 (output_bfd, | |
cbe950e9 L |
4016 | (gotplt->output_section->vma |
4017 | + gotplt->output_offset | |
653165cc | 4018 | + got_offset |
cbe950e9 L |
4019 | - plt->output_section->vma |
4020 | - plt->output_offset | |
653165cc AJ |
4021 | - h->plt.offset |
4022 | - 6), | |
cbe950e9 L |
4023 | plt->contents + h->plt.offset + 2); |
4024 | ||
4025 | /* Don't fill PLT entry for static executables. */ | |
6de2ae4a | 4026 | if (plt == htab->elf.splt) |
cbe950e9 L |
4027 | { |
4028 | /* Put relocation index. */ | |
4029 | bfd_put_32 (output_bfd, plt_index, | |
4030 | plt->contents + h->plt.offset + 7); | |
4031 | /* Put offset for jmp .PLT0. */ | |
4032 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
4033 | plt->contents + h->plt.offset + 12); | |
4034 | } | |
70256ad8 | 4035 | |
653165cc AJ |
4036 | /* Fill in the entry in the global offset table, initially this |
4037 | points to the pushq instruction in the PLT which is at offset 6. */ | |
cbe950e9 L |
4038 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4039 | + plt->output_offset | |
70256ad8 | 4040 | + h->plt.offset + 6), |
cbe950e9 | 4041 | gotplt->contents + got_offset); |
70256ad8 AJ |
4042 | |
4043 | /* Fill in the entry in the .rela.plt section. */ | |
cbe950e9 L |
4044 | rela.r_offset = (gotplt->output_section->vma |
4045 | + gotplt->output_offset | |
70256ad8 | 4046 | + got_offset); |
cbe950e9 L |
4047 | if (h->dynindx == -1 |
4048 | || ((info->executable | |
4049 | || ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
4050 | && h->def_regular | |
4051 | && h->type == STT_GNU_IFUNC)) | |
4052 | { | |
4053 | /* If an STT_GNU_IFUNC symbol is locally defined, generate | |
4054 | R_X86_64_IRELATIVE instead of R_X86_64_JUMP_SLOT. */ | |
351f65ca | 4055 | rela.r_info = htab->r_info (0, R_X86_64_IRELATIVE); |
cbe950e9 L |
4056 | rela.r_addend = (h->root.u.def.value |
4057 | + h->root.u.def.section->output_section->vma | |
4058 | + h->root.u.def.section->output_offset); | |
4059 | } | |
4060 | else | |
4061 | { | |
351f65ca | 4062 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_JUMP_SLOT); |
cbe950e9 L |
4063 | rela.r_addend = 0; |
4064 | } | |
351f65ca L |
4065 | |
4066 | bed = get_elf_backend_data (output_bfd); | |
4067 | loc = relplt->contents + plt_index * bed->s->sizeof_rela; | |
82e96e07 | 4068 | bed->s->swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 4069 | |
f5385ebf | 4070 | if (!h->def_regular) |
70256ad8 AJ |
4071 | { |
4072 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
4073 | the .plt section. Leave the value if there were any |
4074 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
4075 | for the dynamic linker, to make function pointer |
4076 | comparisons work between an application and shared | |
47a9f7b3 JJ |
4077 | library), otherwise set it to zero. If a function is only |
4078 | called from a binary, there is no need to slow down | |
4079 | shared libraries because of that. */ | |
70256ad8 | 4080 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 4081 | if (!h->pointer_equality_needed) |
47a9f7b3 | 4082 | sym->st_value = 0; |
70256ad8 AJ |
4083 | } |
4084 | } | |
4085 | ||
bffbf940 | 4086 | if (h->got.offset != (bfd_vma) -1 |
351f65ca L |
4087 | && ! GOT_TLS_GD_ANY_P (elf_x86_64_hash_entry (h)->tls_type) |
4088 | && elf_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) | |
053579d7 | 4089 | { |
053579d7 AJ |
4090 | Elf_Internal_Rela rela; |
4091 | ||
4092 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 4093 | up. */ |
6de2ae4a | 4094 | if (htab->elf.sgot == NULL || htab->elf.srelgot == NULL) |
c434dee6 | 4095 | abort (); |
053579d7 | 4096 | |
6de2ae4a L |
4097 | rela.r_offset = (htab->elf.sgot->output_section->vma |
4098 | + htab->elf.sgot->output_offset | |
dc810e39 | 4099 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
4100 | |
4101 | /* If this is a static link, or it is a -Bsymbolic link and the | |
4102 | symbol is defined locally or was forced to be local because | |
4103 | of a version file, we just want to emit a RELATIVE reloc. | |
4104 | The entry in the global offset table will already have been | |
4105 | initialized in the relocate_section function. */ | |
710ab287 | 4106 | if (h->def_regular |
0018b0a3 L |
4107 | && h->type == STT_GNU_IFUNC) |
4108 | { | |
710ab287 L |
4109 | if (info->shared) |
4110 | { | |
4111 | /* Generate R_X86_64_GLOB_DAT. */ | |
4112 | goto do_glob_dat; | |
4113 | } | |
4114 | else | |
4115 | { | |
90d60710 L |
4116 | asection *plt; |
4117 | ||
710ab287 L |
4118 | if (!h->pointer_equality_needed) |
4119 | abort (); | |
4120 | ||
4121 | /* For non-shared object, we can't use .got.plt, which | |
4122 | contains the real function addres if we need pointer | |
4123 | equality. We load the GOT entry with the PLT entry. */ | |
90d60710 | 4124 | plt = htab->elf.splt ? htab->elf.splt : htab->elf.iplt; |
710ab287 L |
4125 | bfd_put_64 (output_bfd, (plt->output_section->vma |
4126 | + plt->output_offset | |
4127 | + h->plt.offset), | |
6de2ae4a | 4128 | htab->elf.sgot->contents + h->got.offset); |
710ab287 L |
4129 | return TRUE; |
4130 | } | |
0018b0a3 L |
4131 | } |
4132 | else if (info->shared | |
4133 | && SYMBOL_REFERENCES_LOCAL (info, h)) | |
053579d7 | 4134 | { |
41bed6dd L |
4135 | if (!h->def_regular) |
4136 | return FALSE; | |
cc78d0af | 4137 | BFD_ASSERT((h->got.offset & 1) != 0); |
351f65ca | 4138 | rela.r_info = htab->r_info (0, R_X86_64_RELATIVE); |
053579d7 AJ |
4139 | rela.r_addend = (h->root.u.def.value |
4140 | + h->root.u.def.section->output_section->vma | |
4141 | + h->root.u.def.section->output_offset); | |
4142 | } | |
4143 | else | |
4144 | { | |
4145 | BFD_ASSERT((h->got.offset & 1) == 0); | |
710ab287 | 4146 | do_glob_dat: |
c434dee6 | 4147 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
6de2ae4a | 4148 | htab->elf.sgot->contents + h->got.offset); |
351f65ca | 4149 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_GLOB_DAT); |
053579d7 AJ |
4150 | rela.r_addend = 0; |
4151 | } | |
4152 | ||
351f65ca | 4153 | elf_append_rela (output_bfd, htab->elf.srelgot, &rela); |
053579d7 AJ |
4154 | } |
4155 | ||
f5385ebf | 4156 | if (h->needs_copy) |
70256ad8 | 4157 | { |
70256ad8 AJ |
4158 | Elf_Internal_Rela rela; |
4159 | ||
4160 | /* This symbol needs a copy reloc. Set it up. */ | |
4161 | ||
c434dee6 AJ |
4162 | if (h->dynindx == -1 |
4163 | || (h->root.type != bfd_link_hash_defined | |
4164 | && h->root.type != bfd_link_hash_defweak) | |
4165 | || htab->srelbss == NULL) | |
4166 | abort (); | |
70256ad8 AJ |
4167 | |
4168 | rela.r_offset = (h->root.u.def.value | |
4169 | + h->root.u.def.section->output_section->vma | |
4170 | + h->root.u.def.section->output_offset); | |
351f65ca | 4171 | rela.r_info = htab->r_info (h->dynindx, R_X86_64_COPY); |
70256ad8 | 4172 | rela.r_addend = 0; |
351f65ca | 4173 | elf_append_rela (output_bfd, htab->srelbss, &rela); |
70256ad8 AJ |
4174 | } |
4175 | ||
c25bc9fc L |
4176 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. SYM may |
4177 | be NULL for local symbols. */ | |
4178 | if (sym != NULL | |
4179 | && (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
4180 | || h == htab->elf.hgot)) | |
70256ad8 AJ |
4181 | sym->st_shndx = SHN_ABS; |
4182 | ||
b34976b6 | 4183 | return TRUE; |
70256ad8 AJ |
4184 | } |
4185 | ||
c25bc9fc L |
4186 | /* Finish up local dynamic symbol handling. We set the contents of |
4187 | various dynamic sections here. */ | |
4188 | ||
4189 | static bfd_boolean | |
351f65ca | 4190 | elf_x86_64_finish_local_dynamic_symbol (void **slot, void *inf) |
c25bc9fc L |
4191 | { |
4192 | struct elf_link_hash_entry *h | |
4193 | = (struct elf_link_hash_entry *) *slot; | |
4194 | struct bfd_link_info *info | |
4195 | = (struct bfd_link_info *) inf; | |
4196 | ||
351f65ca | 4197 | return elf_x86_64_finish_dynamic_symbol (info->output_bfd, |
c25bc9fc L |
4198 | info, h, NULL); |
4199 | } | |
4200 | ||
c434dee6 AJ |
4201 | /* Used to decide how to sort relocs in an optimal manner for the |
4202 | dynamic linker, before writing them out. */ | |
4203 | ||
4204 | static enum elf_reloc_type_class | |
351f65ca | 4205 | elf_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 | 4206 | { |
351f65ca | 4207 | switch ((int) ELF32_R_TYPE (rela->r_info)) |
c434dee6 AJ |
4208 | { |
4209 | case R_X86_64_RELATIVE: | |
4210 | return reloc_class_relative; | |
4211 | case R_X86_64_JUMP_SLOT: | |
4212 | return reloc_class_plt; | |
4213 | case R_X86_64_COPY: | |
4214 | return reloc_class_copy; | |
4215 | default: | |
4216 | return reloc_class_normal; | |
4217 | } | |
4218 | } | |
4219 | ||
70256ad8 AJ |
4220 | /* Finish up the dynamic sections. */ |
4221 | ||
b34976b6 | 4222 | static bfd_boolean |
351f65ca L |
4223 | elf_x86_64_finish_dynamic_sections (bfd *output_bfd, |
4224 | struct bfd_link_info *info) | |
70256ad8 | 4225 | { |
351f65ca | 4226 | struct elf_x86_64_link_hash_table *htab; |
70256ad8 AJ |
4227 | bfd *dynobj; |
4228 | asection *sdyn; | |
70256ad8 | 4229 | |
351f65ca | 4230 | htab = elf_x86_64_hash_table (info); |
4dfe6ac6 NC |
4231 | if (htab == NULL) |
4232 | return FALSE; | |
4233 | ||
c434dee6 | 4234 | dynobj = htab->elf.dynobj; |
70256ad8 AJ |
4235 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
4236 | ||
c434dee6 | 4237 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 4238 | { |
82e96e07 L |
4239 | bfd_byte *dyncon, *dynconend; |
4240 | const struct elf_backend_data *bed; | |
4241 | bfd_size_type sizeof_dyn; | |
70256ad8 | 4242 | |
6de2ae4a | 4243 | if (sdyn == NULL || htab->elf.sgot == NULL) |
c434dee6 | 4244 | abort (); |
70256ad8 | 4245 | |
82e96e07 L |
4246 | bed = get_elf_backend_data (dynobj); |
4247 | sizeof_dyn = bed->s->sizeof_dyn; | |
4248 | dyncon = sdyn->contents; | |
4249 | dynconend = sdyn->contents + sdyn->size; | |
4250 | for (; dyncon < dynconend; dyncon += sizeof_dyn) | |
70256ad8 AJ |
4251 | { |
4252 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
4253 | asection *s; |
4254 | ||
82e96e07 | 4255 | (*bed->s->swap_dyn_in) (dynobj, dyncon, &dyn); |
70256ad8 AJ |
4256 | |
4257 | switch (dyn.d_tag) | |
4258 | { | |
4259 | default: | |
053579d7 | 4260 | continue; |
70256ad8 AJ |
4261 | |
4262 | case DT_PLTGOT: | |
6de2ae4a | 4263 | s = htab->elf.sgotplt; |
8c37241b | 4264 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; |
c434dee6 | 4265 | break; |
70256ad8 AJ |
4266 | |
4267 | case DT_JMPREL: | |
6de2ae4a | 4268 | dyn.d_un.d_ptr = htab->elf.srelplt->output_section->vma; |
c434dee6 | 4269 | break; |
70256ad8 | 4270 | |
c434dee6 | 4271 | case DT_PLTRELSZ: |
6de2ae4a | 4272 | s = htab->elf.srelplt->output_section; |
eea6121a | 4273 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
4274 | break; |
4275 | ||
4276 | case DT_RELASZ: | |
c434dee6 AJ |
4277 | /* The procedure linkage table relocs (DT_JMPREL) should |
4278 | not be included in the overall relocs (DT_RELA). | |
4279 | Therefore, we override the DT_RELASZ entry here to | |
4280 | make it not include the JMPREL relocs. Since the | |
4281 | linker script arranges for .rela.plt to follow all | |
4282 | other relocation sections, we don't have to worry | |
4283 | about changing the DT_RELA entry. */ | |
6de2ae4a | 4284 | if (htab->elf.srelplt != NULL) |
70256ad8 | 4285 | { |
6de2ae4a | 4286 | s = htab->elf.srelplt->output_section; |
eea6121a | 4287 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
4288 | } |
4289 | break; | |
67a4f2b7 AO |
4290 | |
4291 | case DT_TLSDESC_PLT: | |
6de2ae4a | 4292 | s = htab->elf.splt; |
67a4f2b7 AO |
4293 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4294 | + htab->tlsdesc_plt; | |
4295 | break; | |
4296 | ||
4297 | case DT_TLSDESC_GOT: | |
6de2ae4a | 4298 | s = htab->elf.sgot; |
67a4f2b7 AO |
4299 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset |
4300 | + htab->tlsdesc_got; | |
4301 | break; | |
70256ad8 | 4302 | } |
c434dee6 | 4303 | |
82e96e07 | 4304 | (*bed->s->swap_dyn_out) (output_bfd, &dyn, dyncon); |
70256ad8 AJ |
4305 | } |
4306 | ||
c434dee6 | 4307 | /* Fill in the special first entry in the procedure linkage table. */ |
6de2ae4a | 4308 | if (htab->elf.splt && htab->elf.splt->size > 0) |
70256ad8 | 4309 | { |
653165cc | 4310 | /* Fill in the first entry in the procedure linkage table. */ |
351f65ca | 4311 | memcpy (htab->elf.splt->contents, elf_x86_64_plt0_entry, |
c434dee6 | 4312 | PLT_ENTRY_SIZE); |
653165cc AJ |
4313 | /* Add offset for pushq GOT+8(%rip), since the instruction |
4314 | uses 6 bytes subtract this value. */ | |
4315 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4316 | (htab->elf.sgotplt->output_section->vma |
4317 | + htab->elf.sgotplt->output_offset | |
653165cc | 4318 | + 8 |
6de2ae4a L |
4319 | - htab->elf.splt->output_section->vma |
4320 | - htab->elf.splt->output_offset | |
653165cc | 4321 | - 6), |
6de2ae4a | 4322 | htab->elf.splt->contents + 2); |
653165cc AJ |
4323 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
4324 | the end of the instruction. */ | |
4325 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4326 | (htab->elf.sgotplt->output_section->vma |
4327 | + htab->elf.sgotplt->output_offset | |
653165cc | 4328 | + 16 |
6de2ae4a L |
4329 | - htab->elf.splt->output_section->vma |
4330 | - htab->elf.splt->output_offset | |
653165cc | 4331 | - 12), |
6de2ae4a | 4332 | htab->elf.splt->contents + 8); |
653165cc | 4333 | |
6de2ae4a | 4334 | elf_section_data (htab->elf.splt->output_section)->this_hdr.sh_entsize = |
c434dee6 | 4335 | PLT_ENTRY_SIZE; |
67a4f2b7 AO |
4336 | |
4337 | if (htab->tlsdesc_plt) | |
4338 | { | |
4339 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
6de2ae4a | 4340 | htab->elf.sgot->contents + htab->tlsdesc_got); |
67a4f2b7 | 4341 | |
6de2ae4a | 4342 | memcpy (htab->elf.splt->contents + htab->tlsdesc_plt, |
351f65ca | 4343 | elf_x86_64_plt0_entry, |
67a4f2b7 AO |
4344 | PLT_ENTRY_SIZE); |
4345 | ||
4346 | /* Add offset for pushq GOT+8(%rip), since the | |
4347 | instruction uses 6 bytes subtract this value. */ | |
4348 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4349 | (htab->elf.sgotplt->output_section->vma |
4350 | + htab->elf.sgotplt->output_offset | |
67a4f2b7 | 4351 | + 8 |
6de2ae4a L |
4352 | - htab->elf.splt->output_section->vma |
4353 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4354 | - htab->tlsdesc_plt |
4355 | - 6), | |
6de2ae4a | 4356 | htab->elf.splt->contents + htab->tlsdesc_plt + 2); |
67a4f2b7 AO |
4357 | /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for |
4358 | htab->tlsdesc_got. The 12 is the offset to the end of | |
4359 | the instruction. */ | |
4360 | bfd_put_32 (output_bfd, | |
6de2ae4a L |
4361 | (htab->elf.sgot->output_section->vma |
4362 | + htab->elf.sgot->output_offset | |
67a4f2b7 | 4363 | + htab->tlsdesc_got |
6de2ae4a L |
4364 | - htab->elf.splt->output_section->vma |
4365 | - htab->elf.splt->output_offset | |
67a4f2b7 AO |
4366 | - htab->tlsdesc_plt |
4367 | - 12), | |
6de2ae4a | 4368 | htab->elf.splt->contents + htab->tlsdesc_plt + 8); |
67a4f2b7 | 4369 | } |
70256ad8 | 4370 | } |
70256ad8 AJ |
4371 | } |
4372 | ||
6de2ae4a | 4373 | if (htab->elf.sgotplt) |
70256ad8 | 4374 | { |
56d4289c L |
4375 | if (bfd_is_abs_section (htab->elf.sgotplt->output_section)) |
4376 | { | |
4377 | (*_bfd_error_handler) | |
4378 | (_("discarded output section: `%A'"), htab->elf.sgotplt); | |
4379 | return FALSE; | |
4380 | } | |
4381 | ||
c434dee6 | 4382 | /* Fill in the first three entries in the global offset table. */ |
6de2ae4a | 4383 | if (htab->elf.sgotplt->size > 0) |
c434dee6 AJ |
4384 | { |
4385 | /* Set the first entry in the global offset table to the address of | |
4386 | the dynamic section. */ | |
4387 | if (sdyn == NULL) | |
6de2ae4a | 4388 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents); |
c434dee6 AJ |
4389 | else |
4390 | bfd_put_64 (output_bfd, | |
4391 | sdyn->output_section->vma + sdyn->output_offset, | |
6de2ae4a | 4392 | htab->elf.sgotplt->contents); |
c434dee6 | 4393 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ |
6de2ae4a L |
4394 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE); |
4395 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->elf.sgotplt->contents + GOT_ENTRY_SIZE*2); | |
c434dee6 | 4396 | } |
70256ad8 | 4397 | |
6de2ae4a | 4398 | elf_section_data (htab->elf.sgotplt->output_section)->this_hdr.sh_entsize = |
c434dee6 AJ |
4399 | GOT_ENTRY_SIZE; |
4400 | } | |
70256ad8 | 4401 | |
6de2ae4a L |
4402 | if (htab->elf.sgot && htab->elf.sgot->size > 0) |
4403 | elf_section_data (htab->elf.sgot->output_section)->this_hdr.sh_entsize | |
8c37241b JJ |
4404 | = GOT_ENTRY_SIZE; |
4405 | ||
c25bc9fc L |
4406 | /* Fill PLT and GOT entries for local STT_GNU_IFUNC symbols. */ |
4407 | htab_traverse (htab->loc_hash_table, | |
351f65ca | 4408 | elf_x86_64_finish_local_dynamic_symbol, |
c25bc9fc L |
4409 | info); |
4410 | ||
b34976b6 | 4411 | return TRUE; |
8d88c4ca NC |
4412 | } |
4413 | ||
4c45e5c9 JJ |
4414 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
4415 | or (bfd_vma) -1 if it should not be included. */ | |
4416 | ||
4417 | static bfd_vma | |
351f65ca L |
4418 | elf_x86_64_plt_sym_val (bfd_vma i, const asection *plt, |
4419 | const arelent *rel ATTRIBUTE_UNUSED) | |
4c45e5c9 JJ |
4420 | { |
4421 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
4422 | } | |
8df9fc9d | 4423 | |
d2b2c203 DJ |
4424 | /* Handle an x86-64 specific section when reading an object file. This |
4425 | is called when elfcode.h finds a section with an unknown type. */ | |
4426 | ||
4427 | static bfd_boolean | |
351f65ca | 4428 | elf_x86_64_section_from_shdr (bfd *abfd, |
6dc132d9 L |
4429 | Elf_Internal_Shdr *hdr, |
4430 | const char *name, | |
4431 | int shindex) | |
d2b2c203 DJ |
4432 | { |
4433 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
4434 | return FALSE; | |
4435 | ||
6dc132d9 | 4436 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
4437 | return FALSE; |
4438 | ||
4439 | return TRUE; | |
4440 | } | |
4441 | ||
3b22753a L |
4442 | /* Hook called by the linker routine which adds symbols from an object |
4443 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
4444 | of .bss. */ | |
4445 | ||
4446 | static bfd_boolean | |
351f65ca L |
4447 | elf_x86_64_add_symbol_hook (bfd *abfd, |
4448 | struct bfd_link_info *info, | |
4449 | Elf_Internal_Sym *sym, | |
4450 | const char **namep ATTRIBUTE_UNUSED, | |
4451 | flagword *flagsp ATTRIBUTE_UNUSED, | |
4452 | asection **secp, | |
4453 | bfd_vma *valp) | |
3b22753a L |
4454 | { |
4455 | asection *lcomm; | |
4456 | ||
4457 | switch (sym->st_shndx) | |
4458 | { | |
4459 | case SHN_X86_64_LCOMMON: | |
4460 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
4461 | if (lcomm == NULL) | |
4462 | { | |
4463 | lcomm = bfd_make_section_with_flags (abfd, | |
4464 | "LARGE_COMMON", | |
4465 | (SEC_ALLOC | |
4466 | | SEC_IS_COMMON | |
4467 | | SEC_LINKER_CREATED)); | |
4468 | if (lcomm == NULL) | |
4469 | return FALSE; | |
4470 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
4471 | } | |
4472 | *secp = lcomm; | |
4473 | *valp = sym->st_size; | |
c35bdf6e | 4474 | return TRUE; |
3b22753a | 4475 | } |
d8045f23 | 4476 | |
c16153ae | 4477 | if ((abfd->flags & DYNAMIC) == 0 |
f64b2e8d NC |
4478 | && (ELF_ST_TYPE (sym->st_info) == STT_GNU_IFUNC |
4479 | || ELF_ST_BIND (sym->st_info) == STB_GNU_UNIQUE)) | |
4480 | elf_tdata (info->output_bfd)->has_gnu_symbols = TRUE; | |
d8045f23 | 4481 | |
3b22753a L |
4482 | return TRUE; |
4483 | } | |
4484 | ||
4485 | ||
4486 | /* Given a BFD section, try to locate the corresponding ELF section | |
4487 | index. */ | |
4488 | ||
4489 | static bfd_boolean | |
351f65ca L |
4490 | elf_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, |
4491 | asection *sec, int *index_return) | |
3b22753a L |
4492 | { |
4493 | if (sec == &_bfd_elf_large_com_section) | |
4494 | { | |
91d6fa6a | 4495 | *index_return = SHN_X86_64_LCOMMON; |
3b22753a L |
4496 | return TRUE; |
4497 | } | |
4498 | return FALSE; | |
4499 | } | |
4500 | ||
4501 | /* Process a symbol. */ | |
4502 | ||
4503 | static void | |
351f65ca L |
4504 | elf_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, |
4505 | asymbol *asym) | |
3b22753a L |
4506 | { |
4507 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
4508 | ||
4509 | switch (elfsym->internal_elf_sym.st_shndx) | |
4510 | { | |
4511 | case SHN_X86_64_LCOMMON: | |
4512 | asym->section = &_bfd_elf_large_com_section; | |
4513 | asym->value = elfsym->internal_elf_sym.st_size; | |
4514 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
4515 | asym->flags &= ~BSF_GLOBAL; | |
4516 | break; | |
4517 | } | |
4518 | } | |
4519 | ||
4520 | static bfd_boolean | |
351f65ca | 4521 | elf_x86_64_common_definition (Elf_Internal_Sym *sym) |
3b22753a L |
4522 | { |
4523 | return (sym->st_shndx == SHN_COMMON | |
4524 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
4525 | } | |
4526 | ||
4527 | static unsigned int | |
351f65ca | 4528 | elf_x86_64_common_section_index (asection *sec) |
3b22753a L |
4529 | { |
4530 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4531 | return SHN_COMMON; | |
4532 | else | |
4533 | return SHN_X86_64_LCOMMON; | |
4534 | } | |
4535 | ||
4536 | static asection * | |
351f65ca | 4537 | elf_x86_64_common_section (asection *sec) |
3b22753a L |
4538 | { |
4539 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
4540 | return bfd_com_section_ptr; | |
4541 | else | |
4542 | return &_bfd_elf_large_com_section; | |
4543 | } | |
4544 | ||
4545 | static bfd_boolean | |
351f65ca L |
4546 | elf_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, |
4547 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
4548 | struct elf_link_hash_entry *h, | |
4549 | Elf_Internal_Sym *sym, | |
4550 | asection **psec, | |
4551 | bfd_vma *pvalue ATTRIBUTE_UNUSED, | |
4552 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
4553 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
4554 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
4555 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
4556 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
71e7aa7d L |
4557 | bfd_boolean *newdyn ATTRIBUTE_UNUSED, |
4558 | bfd_boolean *newdef, | |
351f65ca L |
4559 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, |
4560 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
4561 | bfd *abfd ATTRIBUTE_UNUSED, | |
4562 | asection **sec, | |
71e7aa7d L |
4563 | bfd_boolean *olddyn ATTRIBUTE_UNUSED, |
4564 | bfd_boolean *olddef, | |
351f65ca L |
4565 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, |
4566 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
4567 | bfd *oldbfd, | |
4568 | asection **oldsec) | |
3b22753a L |
4569 | { |
4570 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
4571 | normal common symbol. We turn the large common symbol into a |
4572 | normal one. */ | |
71e7aa7d | 4573 | if (!*olddef |
3b22753a | 4574 | && h->root.type == bfd_link_hash_common |
71e7aa7d | 4575 | && !*newdef |
3b22753a | 4576 | && bfd_is_com_section (*sec) |
00492999 | 4577 | && *oldsec != *sec) |
3b22753a | 4578 | { |
00492999 L |
4579 | if (sym->st_shndx == SHN_COMMON |
4580 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
4581 | { | |
4582 | h->root.u.c.p->section | |
4583 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
4584 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
4585 | } | |
4586 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
4587 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 4588 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
4589 | } |
4590 | ||
4591 | return TRUE; | |
4592 | } | |
4593 | ||
4594 | static int | |
351f65ca L |
4595 | elf_x86_64_additional_program_headers (bfd *abfd, |
4596 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
4597 | { |
4598 | asection *s; | |
9a2e389a | 4599 | int count = 0; |
3b22753a L |
4600 | |
4601 | /* Check to see if we need a large readonly segment. */ | |
4602 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
4603 | if (s && (s->flags & SEC_LOAD)) | |
4604 | count++; | |
4605 | ||
4606 | /* Check to see if we need a large data segment. Since .lbss sections | |
4607 | is placed right after the .bss section, there should be no need for | |
4608 | a large data segment just because of .lbss. */ | |
4609 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
4610 | if (s && (s->flags & SEC_LOAD)) | |
4611 | count++; | |
4612 | ||
4613 | return count; | |
4614 | } | |
4615 | ||
fdc90cb4 JJ |
4616 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
4617 | ||
4618 | static bfd_boolean | |
351f65ca | 4619 | elf_x86_64_hash_symbol (struct elf_link_hash_entry *h) |
fdc90cb4 JJ |
4620 | { |
4621 | if (h->plt.offset != (bfd_vma) -1 | |
4622 | && !h->def_regular | |
4623 | && !h->pointer_equality_needed) | |
4624 | return FALSE; | |
4625 | ||
4626 | return _bfd_elf_hash_symbol (h); | |
4627 | } | |
4628 | ||
c543bf9a L |
4629 | /* Return TRUE iff relocations for INPUT are compatible with OUTPUT. */ |
4630 | ||
4631 | static bfd_boolean | |
4632 | elf_x86_64_relocs_compatible (const bfd_target *input, | |
4633 | const bfd_target *output) | |
4634 | { | |
4635 | return ((xvec_get_elf_backend_data (input)->s->elfclass | |
4636 | == xvec_get_elf_backend_data (output)->s->elfclass) | |
4637 | && _bfd_elf_relocs_compatible (input, output)); | |
4638 | } | |
4639 | ||
9a2e389a | 4640 | static const struct bfd_elf_special_section |
351f65ca | 4641 | elf_x86_64_special_sections[]= |
3b22753a | 4642 | { |
0112cd26 NC |
4643 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
4644 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4645 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
4646 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4647 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
4648 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
4649 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
4650 | }; |
4651 | ||
70256ad8 AJ |
4652 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
4653 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
4654 | #define ELF_ARCH bfd_arch_i386 | |
ae95ffa6 | 4655 | #define ELF_TARGET_ID X86_64_ELF_DATA |
70256ad8 | 4656 | #define ELF_MACHINE_CODE EM_X86_64 |
f7661549 | 4657 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 4658 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 4659 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
4660 | |
4661 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 4662 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
4663 | #define elf_backend_want_got_plt 1 |
4664 | #define elf_backend_plt_readonly 1 | |
4665 | #define elf_backend_want_plt_sym 0 | |
4666 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 4667 | #define elf_backend_rela_normal 1 |
70256ad8 | 4668 | |
351f65ca | 4669 | #define elf_info_to_howto elf_x86_64_info_to_howto |
70256ad8 | 4670 | |
70256ad8 | 4671 | #define bfd_elf64_bfd_link_hash_table_create \ |
351f65ca | 4672 | elf_x86_64_link_hash_table_create |
c25bc9fc | 4673 | #define bfd_elf64_bfd_link_hash_table_free \ |
351f65ca L |
4674 | elf_x86_64_link_hash_table_free |
4675 | #define bfd_elf64_bfd_reloc_type_lookup elf_x86_64_reloc_type_lookup | |
157090f7 | 4676 | #define bfd_elf64_bfd_reloc_name_lookup \ |
351f65ca | 4677 | elf_x86_64_reloc_name_lookup |
70256ad8 | 4678 | |
351f65ca | 4679 | #define elf_backend_adjust_dynamic_symbol elf_x86_64_adjust_dynamic_symbol |
c543bf9a | 4680 | #define elf_backend_relocs_compatible elf_x86_64_relocs_compatible |
351f65ca L |
4681 | #define elf_backend_check_relocs elf_x86_64_check_relocs |
4682 | #define elf_backend_copy_indirect_symbol elf_x86_64_copy_indirect_symbol | |
4683 | #define elf_backend_create_dynamic_sections elf_x86_64_create_dynamic_sections | |
4684 | #define elf_backend_finish_dynamic_sections elf_x86_64_finish_dynamic_sections | |
4685 | #define elf_backend_finish_dynamic_symbol elf_x86_64_finish_dynamic_symbol | |
4686 | #define elf_backend_gc_mark_hook elf_x86_64_gc_mark_hook | |
4687 | #define elf_backend_gc_sweep_hook elf_x86_64_gc_sweep_hook | |
4688 | #define elf_backend_grok_prstatus elf_x86_64_grok_prstatus | |
4689 | #define elf_backend_grok_psinfo elf_x86_64_grok_psinfo | |
4690 | #define elf_backend_reloc_type_class elf_x86_64_reloc_type_class | |
4691 | #define elf_backend_relocate_section elf_x86_64_relocate_section | |
4692 | #define elf_backend_size_dynamic_sections elf_x86_64_size_dynamic_sections | |
4693 | #define elf_backend_always_size_sections elf_x86_64_always_size_sections | |
74541ad4 | 4694 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
351f65ca | 4695 | #define elf_backend_plt_sym_val elf_x86_64_plt_sym_val |
407443a3 | 4696 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
351f65ca | 4697 | #define bfd_elf64_mkobject elf_x86_64_mkobject |
8d88c4ca | 4698 | |
d2b2c203 | 4699 | #define elf_backend_section_from_shdr \ |
351f65ca | 4700 | elf_x86_64_section_from_shdr |
d2b2c203 | 4701 | |
3b22753a | 4702 | #define elf_backend_section_from_bfd_section \ |
351f65ca | 4703 | elf_x86_64_elf_section_from_bfd_section |
3b22753a | 4704 | #define elf_backend_add_symbol_hook \ |
351f65ca | 4705 | elf_x86_64_add_symbol_hook |
3b22753a | 4706 | #define elf_backend_symbol_processing \ |
351f65ca | 4707 | elf_x86_64_symbol_processing |
3b22753a | 4708 | #define elf_backend_common_section_index \ |
351f65ca | 4709 | elf_x86_64_common_section_index |
3b22753a | 4710 | #define elf_backend_common_section \ |
351f65ca | 4711 | elf_x86_64_common_section |
3b22753a | 4712 | #define elf_backend_common_definition \ |
351f65ca | 4713 | elf_x86_64_common_definition |
3b22753a | 4714 | #define elf_backend_merge_symbol \ |
351f65ca | 4715 | elf_x86_64_merge_symbol |
3b22753a | 4716 | #define elf_backend_special_sections \ |
351f65ca | 4717 | elf_x86_64_special_sections |
3b22753a | 4718 | #define elf_backend_additional_program_headers \ |
351f65ca | 4719 | elf_x86_64_additional_program_headers |
fdc90cb4 | 4720 | #define elf_backend_hash_symbol \ |
351f65ca | 4721 | elf_x86_64_hash_symbol |
3b22753a | 4722 | |
d8045f23 NC |
4723 | #undef elf_backend_post_process_headers |
4724 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
4725 | ||
8d88c4ca | 4726 | #include "elf64-target.h" |
9d7cbccd NC |
4727 | |
4728 | /* FreeBSD support. */ | |
4729 | ||
4730 | #undef TARGET_LITTLE_SYM | |
4731 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
4732 | #undef TARGET_LITTLE_NAME | |
4733 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
4734 | ||
d1036acb L |
4735 | #undef ELF_OSABI |
4736 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd | 4737 | |
9d7cbccd NC |
4738 | #undef elf64_bed |
4739 | #define elf64_bed elf64_x86_64_fbsd_bed | |
4740 | ||
4741 | #include "elf64-target.h" | |
8a9036a4 | 4742 | |
a6cc6b3b RO |
4743 | /* Solaris 2 support. */ |
4744 | ||
4745 | #undef TARGET_LITTLE_SYM | |
4746 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_sol2_vec | |
4747 | #undef TARGET_LITTLE_NAME | |
4748 | #define TARGET_LITTLE_NAME "elf64-x86-64-sol2" | |
4749 | ||
4750 | /* Restore default: we cannot use ELFOSABI_SOLARIS, otherwise ELFOSABI_NONE | |
4751 | objects won't be recognized. */ | |
4752 | #undef ELF_OSABI | |
4753 | ||
4754 | #undef elf64_bed | |
4755 | #define elf64_bed elf64_x86_64_sol2_bed | |
4756 | ||
7dc98aea RO |
4757 | /* The 64-bit static TLS arena size is rounded to the nearest 16-byte |
4758 | boundary. */ | |
4759 | #undef elf_backend_static_tls_alignment | |
4760 | #define elf_backend_static_tls_alignment 16 | |
4761 | ||
a6cc6b3b RO |
4762 | /* The Solaris 2 ABI requires a plt symbol on all platforms. |
4763 | ||
4764 | Cf. Linker and Libraries Guide, Ch. 2, Link-Editor, Generating the Output | |
4765 | File, p.63. */ | |
4766 | #undef elf_backend_want_plt_sym | |
4767 | #define elf_backend_want_plt_sym 1 | |
4768 | ||
4769 | #include "elf64-target.h" | |
4770 | ||
8a9036a4 L |
4771 | /* Intel L1OM support. */ |
4772 | ||
4773 | static bfd_boolean | |
4774 | elf64_l1om_elf_object_p (bfd *abfd) | |
4775 | { | |
4776 | /* Set the right machine number for an L1OM elf64 file. */ | |
4777 | bfd_default_set_arch_mach (abfd, bfd_arch_l1om, bfd_mach_l1om); | |
4778 | return TRUE; | |
4779 | } | |
4780 | ||
4781 | #undef TARGET_LITTLE_SYM | |
4782 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_vec | |
4783 | #undef TARGET_LITTLE_NAME | |
4784 | #define TARGET_LITTLE_NAME "elf64-l1om" | |
4785 | #undef ELF_ARCH | |
4786 | #define ELF_ARCH bfd_arch_l1om | |
4787 | ||
4788 | #undef ELF_MACHINE_CODE | |
4789 | #define ELF_MACHINE_CODE EM_L1OM | |
4790 | ||
4791 | #undef ELF_OSABI | |
4792 | ||
4793 | #undef elf64_bed | |
4794 | #define elf64_bed elf64_l1om_bed | |
4795 | ||
4796 | #undef elf_backend_object_p | |
4797 | #define elf_backend_object_p elf64_l1om_elf_object_p | |
4798 | ||
4799 | #undef elf_backend_post_process_headers | |
7dc98aea | 4800 | #undef elf_backend_static_tls_alignment |
8a9036a4 | 4801 | |
1a0c107f L |
4802 | #undef elf_backend_want_plt_sym |
4803 | #define elf_backend_want_plt_sym 0 | |
4804 | ||
8a9036a4 L |
4805 | #include "elf64-target.h" |
4806 | ||
4807 | /* FreeBSD L1OM support. */ | |
4808 | ||
4809 | #undef TARGET_LITTLE_SYM | |
4810 | #define TARGET_LITTLE_SYM bfd_elf64_l1om_freebsd_vec | |
4811 | #undef TARGET_LITTLE_NAME | |
4812 | #define TARGET_LITTLE_NAME "elf64-l1om-freebsd" | |
4813 | ||
4814 | #undef ELF_OSABI | |
4815 | #define ELF_OSABI ELFOSABI_FREEBSD | |
4816 | ||
4817 | #undef elf64_bed | |
4818 | #define elf64_bed elf64_l1om_fbsd_bed | |
4819 | ||
4820 | #undef elf_backend_post_process_headers | |
4821 | #define elf_backend_post_process_headers _bfd_elf_set_osabi | |
4822 | ||
4823 | #include "elf64-target.h" | |
351f65ca L |
4824 | |
4825 | /* 32bit x86-64 support. */ | |
4826 | ||
4827 | static bfd_boolean | |
4828 | elf32_x86_64_elf_object_p (bfd *abfd) | |
4829 | { | |
4830 | /* Set the right machine number for an x86-64 elf32 file. */ | |
4831 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x64_32); | |
4832 | return TRUE; | |
4833 | } | |
4834 | ||
4835 | #undef TARGET_LITTLE_SYM | |
4836 | #define TARGET_LITTLE_SYM bfd_elf32_x86_64_vec | |
4837 | #undef TARGET_LITTLE_NAME | |
4838 | #define TARGET_LITTLE_NAME "elf32-x86-64" | |
4839 | ||
4840 | #undef ELF_ARCH | |
4841 | #define ELF_ARCH bfd_arch_i386 | |
4842 | ||
4843 | #undef ELF_MACHINE_CODE | |
4844 | #define ELF_MACHINE_CODE EM_X86_64 | |
4845 | ||
4846 | #define bfd_elf32_bfd_link_hash_table_create \ | |
4847 | elf_x86_64_link_hash_table_create | |
4848 | #define bfd_elf32_bfd_link_hash_table_free \ | |
4849 | elf_x86_64_link_hash_table_free | |
4850 | #define bfd_elf32_bfd_reloc_type_lookup \ | |
4851 | elf_x86_64_reloc_type_lookup | |
4852 | #define bfd_elf32_bfd_reloc_name_lookup \ | |
4853 | elf_x86_64_reloc_name_lookup | |
4854 | #define bfd_elf32_mkobject \ | |
4855 | elf_x86_64_mkobject | |
4856 | ||
4857 | #undef ELF_OSABI | |
4858 | ||
4859 | #undef elf_backend_post_process_headers | |
4860 | ||
4861 | #undef elf_backend_object_p | |
4862 | #define elf_backend_object_p \ | |
4863 | elf32_x86_64_elf_object_p | |
4864 | ||
4865 | #undef elf_backend_bfd_from_remote_memory | |
4866 | #define elf_backend_bfd_from_remote_memory \ | |
4867 | _bfd_elf32_bfd_from_remote_memory | |
4868 | ||
4869 | #undef elf_backend_size_info | |
4870 | #define elf_backend_size_info \ | |
4871 | _bfd_elf32_size_info | |
4872 | ||
4873 | #include "elf32-target.h" |