Commit | Line | Data |
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8d88c4ca | 1 | /* X86-64 specific support for 64-bit ELF |
ab96bf03 | 2 | Copyright 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007 |
3eb128b2 | 3 | Free Software Foundation, Inc. |
8d88c4ca NC |
4 | Contributed by Jan Hubicka <jh@suse.cz>. |
5 | ||
ae9a127f | 6 | This file is part of BFD, the Binary File Descriptor library. |
8d88c4ca | 7 | |
ae9a127f NC |
8 | This program is free software; you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
cd123cb7 | 10 | the Free Software Foundation; either version 3 of the License, or |
ae9a127f | 11 | (at your option) any later version. |
8d88c4ca | 12 | |
ae9a127f NC |
13 | This program is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
16 | GNU General Public License for more details. | |
8d88c4ca | 17 | |
ae9a127f NC |
18 | You should have received a copy of the GNU General Public License |
19 | along with this program; if not, write to the Free Software | |
cd123cb7 NC |
20 | Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston, |
21 | MA 02110-1301, USA. */ | |
8d88c4ca | 22 | |
8d88c4ca | 23 | #include "sysdep.h" |
3db64b00 | 24 | #include "bfd.h" |
c434dee6 | 25 | #include "bfdlink.h" |
8d88c4ca NC |
26 | #include "libbfd.h" |
27 | #include "elf-bfd.h" | |
28 | ||
29 | #include "elf/x86-64.h" | |
30 | ||
8d88c4ca NC |
31 | /* In case we're on a 32-bit machine, construct a 64-bit "-1" value. */ |
32 | #define MINUS_ONE (~ (bfd_vma) 0) | |
33 | ||
34 | /* The relocation "howto" table. Order of fields: | |
7b81dfbb AJ |
35 | type, rightshift, size, bitsize, pc_relative, bitpos, complain_on_overflow, |
36 | special_function, name, partial_inplace, src_mask, dst_mask, pcrel_offset. */ | |
70256ad8 AJ |
37 | static reloc_howto_type x86_64_elf_howto_table[] = |
38 | { | |
b34976b6 AM |
39 | HOWTO(R_X86_64_NONE, 0, 0, 0, FALSE, 0, complain_overflow_dont, |
40 | bfd_elf_generic_reloc, "R_X86_64_NONE", FALSE, 0x00000000, 0x00000000, | |
41 | FALSE), | |
42 | HOWTO(R_X86_64_64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
43 | bfd_elf_generic_reloc, "R_X86_64_64", FALSE, MINUS_ONE, MINUS_ONE, | |
44 | FALSE), | |
45 | HOWTO(R_X86_64_PC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
46 | bfd_elf_generic_reloc, "R_X86_64_PC32", FALSE, 0xffffffff, 0xffffffff, | |
47 | TRUE), | |
48 | HOWTO(R_X86_64_GOT32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
49 | bfd_elf_generic_reloc, "R_X86_64_GOT32", FALSE, 0xffffffff, 0xffffffff, | |
50 | FALSE), | |
51 | HOWTO(R_X86_64_PLT32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
52 | bfd_elf_generic_reloc, "R_X86_64_PLT32", FALSE, 0xffffffff, 0xffffffff, | |
53 | TRUE), | |
54 | HOWTO(R_X86_64_COPY, 0, 2, 32, FALSE, 0, complain_overflow_bitfield, | |
55 | bfd_elf_generic_reloc, "R_X86_64_COPY", FALSE, 0xffffffff, 0xffffffff, | |
56 | FALSE), | |
57 | HOWTO(R_X86_64_GLOB_DAT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
58 | bfd_elf_generic_reloc, "R_X86_64_GLOB_DAT", FALSE, MINUS_ONE, | |
59 | MINUS_ONE, FALSE), | |
60 | HOWTO(R_X86_64_JUMP_SLOT, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
61 | bfd_elf_generic_reloc, "R_X86_64_JUMP_SLOT", FALSE, MINUS_ONE, | |
62 | MINUS_ONE, FALSE), | |
63 | HOWTO(R_X86_64_RELATIVE, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
64 | bfd_elf_generic_reloc, "R_X86_64_RELATIVE", FALSE, MINUS_ONE, | |
65 | MINUS_ONE, FALSE), | |
66 | HOWTO(R_X86_64_GOTPCREL, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
67 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL", FALSE, 0xffffffff, | |
68 | 0xffffffff, TRUE), | |
69 | HOWTO(R_X86_64_32, 0, 2, 32, FALSE, 0, complain_overflow_unsigned, | |
70 | bfd_elf_generic_reloc, "R_X86_64_32", FALSE, 0xffffffff, 0xffffffff, | |
71 | FALSE), | |
72 | HOWTO(R_X86_64_32S, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
73 | bfd_elf_generic_reloc, "R_X86_64_32S", FALSE, 0xffffffff, 0xffffffff, | |
74 | FALSE), | |
75 | HOWTO(R_X86_64_16, 0, 1, 16, FALSE, 0, complain_overflow_bitfield, | |
76 | bfd_elf_generic_reloc, "R_X86_64_16", FALSE, 0xffff, 0xffff, FALSE), | |
b0360d8c | 77 | HOWTO(R_X86_64_PC16,0, 1, 16, TRUE, 0, complain_overflow_bitfield, |
b34976b6 | 78 | bfd_elf_generic_reloc, "R_X86_64_PC16", FALSE, 0xffff, 0xffff, TRUE), |
ac2aa337 | 79 | HOWTO(R_X86_64_8, 0, 0, 8, FALSE, 0, complain_overflow_bitfield, |
b34976b6 AM |
80 | bfd_elf_generic_reloc, "R_X86_64_8", FALSE, 0xff, 0xff, FALSE), |
81 | HOWTO(R_X86_64_PC8, 0, 0, 8, TRUE, 0, complain_overflow_signed, | |
82 | bfd_elf_generic_reloc, "R_X86_64_PC8", FALSE, 0xff, 0xff, TRUE), | |
83 | HOWTO(R_X86_64_DTPMOD64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
84 | bfd_elf_generic_reloc, "R_X86_64_DTPMOD64", FALSE, MINUS_ONE, | |
85 | MINUS_ONE, FALSE), | |
86 | HOWTO(R_X86_64_DTPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
87 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF64", FALSE, MINUS_ONE, | |
88 | MINUS_ONE, FALSE), | |
89 | HOWTO(R_X86_64_TPOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
90 | bfd_elf_generic_reloc, "R_X86_64_TPOFF64", FALSE, MINUS_ONE, | |
91 | MINUS_ONE, FALSE), | |
92 | HOWTO(R_X86_64_TLSGD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
93 | bfd_elf_generic_reloc, "R_X86_64_TLSGD", FALSE, 0xffffffff, | |
94 | 0xffffffff, TRUE), | |
95 | HOWTO(R_X86_64_TLSLD, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
96 | bfd_elf_generic_reloc, "R_X86_64_TLSLD", FALSE, 0xffffffff, | |
97 | 0xffffffff, TRUE), | |
ac2aa337 | 98 | HOWTO(R_X86_64_DTPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, |
b34976b6 AM |
99 | bfd_elf_generic_reloc, "R_X86_64_DTPOFF32", FALSE, 0xffffffff, |
100 | 0xffffffff, FALSE), | |
101 | HOWTO(R_X86_64_GOTTPOFF, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
102 | bfd_elf_generic_reloc, "R_X86_64_GOTTPOFF", FALSE, 0xffffffff, | |
103 | 0xffffffff, TRUE), | |
104 | HOWTO(R_X86_64_TPOFF32, 0, 2, 32, FALSE, 0, complain_overflow_signed, | |
105 | bfd_elf_generic_reloc, "R_X86_64_TPOFF32", FALSE, 0xffffffff, | |
106 | 0xffffffff, FALSE), | |
d6ab8113 JB |
107 | HOWTO(R_X86_64_PC64, 0, 4, 64, TRUE, 0, complain_overflow_bitfield, |
108 | bfd_elf_generic_reloc, "R_X86_64_PC64", FALSE, MINUS_ONE, MINUS_ONE, | |
109 | TRUE), | |
110 | HOWTO(R_X86_64_GOTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_bitfield, | |
111 | bfd_elf_generic_reloc, "R_X86_64_GOTOFF64", | |
112 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
113 | HOWTO(R_X86_64_GOTPC32, 0, 2, 32, TRUE, 0, complain_overflow_signed, | |
114 | bfd_elf_generic_reloc, "R_X86_64_GOTPC32", | |
115 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
7b81dfbb AJ |
116 | HOWTO(R_X86_64_GOT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, |
117 | bfd_elf_generic_reloc, "R_X86_64_GOT64", FALSE, MINUS_ONE, MINUS_ONE, | |
118 | FALSE), | |
119 | HOWTO(R_X86_64_GOTPCREL64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
120 | bfd_elf_generic_reloc, "R_X86_64_GOTPCREL64", FALSE, MINUS_ONE, | |
121 | MINUS_ONE, TRUE), | |
122 | HOWTO(R_X86_64_GOTPC64, 0, 4, 64, TRUE, 0, complain_overflow_signed, | |
123 | bfd_elf_generic_reloc, "R_X86_64_GOTPC64", | |
124 | FALSE, MINUS_ONE, MINUS_ONE, TRUE), | |
125 | HOWTO(R_X86_64_GOTPLT64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
126 | bfd_elf_generic_reloc, "R_X86_64_GOTPLT64", FALSE, MINUS_ONE, | |
127 | MINUS_ONE, FALSE), | |
128 | HOWTO(R_X86_64_PLTOFF64, 0, 4, 64, FALSE, 0, complain_overflow_signed, | |
129 | bfd_elf_generic_reloc, "R_X86_64_PLTOFF64", FALSE, MINUS_ONE, | |
130 | MINUS_ONE, FALSE), | |
67a4f2b7 AO |
131 | EMPTY_HOWTO (32), |
132 | EMPTY_HOWTO (33), | |
133 | HOWTO(R_X86_64_GOTPC32_TLSDESC, 0, 2, 32, TRUE, 0, | |
134 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
135 | "R_X86_64_GOTPC32_TLSDESC", | |
136 | FALSE, 0xffffffff, 0xffffffff, TRUE), | |
137 | HOWTO(R_X86_64_TLSDESC_CALL, 0, 0, 0, FALSE, 0, | |
138 | complain_overflow_dont, bfd_elf_generic_reloc, | |
139 | "R_X86_64_TLSDESC_CALL", | |
140 | FALSE, 0, 0, FALSE), | |
141 | HOWTO(R_X86_64_TLSDESC, 0, 4, 64, FALSE, 0, | |
142 | complain_overflow_bitfield, bfd_elf_generic_reloc, | |
143 | "R_X86_64_TLSDESC", | |
144 | FALSE, MINUS_ONE, MINUS_ONE, FALSE), | |
fe4770f4 | 145 | |
a33d77bc JB |
146 | /* We have a gap in the reloc numbers here. |
147 | R_X86_64_standard counts the number up to this point, and | |
148 | R_X86_64_vt_offset is the value to subtract from a reloc type of | |
149 | R_X86_64_GNU_VT* to form an index into this table. */ | |
67a4f2b7 | 150 | #define R_X86_64_standard (R_X86_64_TLSDESC + 1) |
a33d77bc JB |
151 | #define R_X86_64_vt_offset (R_X86_64_GNU_VTINHERIT - R_X86_64_standard) |
152 | ||
fe4770f4 | 153 | /* GNU extension to record C++ vtable hierarchy. */ |
b34976b6 AM |
154 | HOWTO (R_X86_64_GNU_VTINHERIT, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
155 | NULL, "R_X86_64_GNU_VTINHERIT", FALSE, 0, 0, FALSE), | |
fe4770f4 AJ |
156 | |
157 | /* GNU extension to record C++ vtable member usage. */ | |
b34976b6 AM |
158 | HOWTO (R_X86_64_GNU_VTENTRY, 0, 4, 0, FALSE, 0, complain_overflow_dont, |
159 | _bfd_elf_rel_vtable_reloc_fn, "R_X86_64_GNU_VTENTRY", FALSE, 0, 0, | |
160 | FALSE) | |
8d88c4ca NC |
161 | }; |
162 | ||
163 | /* Map BFD relocs to the x86_64 elf relocs. */ | |
70256ad8 AJ |
164 | struct elf_reloc_map |
165 | { | |
8d88c4ca NC |
166 | bfd_reloc_code_real_type bfd_reloc_val; |
167 | unsigned char elf_reloc_val; | |
168 | }; | |
169 | ||
dc810e39 | 170 | static const struct elf_reloc_map x86_64_reloc_map[] = |
8d88c4ca | 171 | { |
70256ad8 AJ |
172 | { BFD_RELOC_NONE, R_X86_64_NONE, }, |
173 | { BFD_RELOC_64, R_X86_64_64, }, | |
174 | { BFD_RELOC_32_PCREL, R_X86_64_PC32, }, | |
175 | { BFD_RELOC_X86_64_GOT32, R_X86_64_GOT32,}, | |
176 | { BFD_RELOC_X86_64_PLT32, R_X86_64_PLT32,}, | |
177 | { BFD_RELOC_X86_64_COPY, R_X86_64_COPY, }, | |
178 | { BFD_RELOC_X86_64_GLOB_DAT, R_X86_64_GLOB_DAT, }, | |
179 | { BFD_RELOC_X86_64_JUMP_SLOT, R_X86_64_JUMP_SLOT, }, | |
180 | { BFD_RELOC_X86_64_RELATIVE, R_X86_64_RELATIVE, }, | |
181 | { BFD_RELOC_X86_64_GOTPCREL, R_X86_64_GOTPCREL, }, | |
182 | { BFD_RELOC_32, R_X86_64_32, }, | |
183 | { BFD_RELOC_X86_64_32S, R_X86_64_32S, }, | |
184 | { BFD_RELOC_16, R_X86_64_16, }, | |
185 | { BFD_RELOC_16_PCREL, R_X86_64_PC16, }, | |
186 | { BFD_RELOC_8, R_X86_64_8, }, | |
187 | { BFD_RELOC_8_PCREL, R_X86_64_PC8, }, | |
bffbf940 JJ |
188 | { BFD_RELOC_X86_64_DTPMOD64, R_X86_64_DTPMOD64, }, |
189 | { BFD_RELOC_X86_64_DTPOFF64, R_X86_64_DTPOFF64, }, | |
190 | { BFD_RELOC_X86_64_TPOFF64, R_X86_64_TPOFF64, }, | |
191 | { BFD_RELOC_X86_64_TLSGD, R_X86_64_TLSGD, }, | |
192 | { BFD_RELOC_X86_64_TLSLD, R_X86_64_TLSLD, }, | |
193 | { BFD_RELOC_X86_64_DTPOFF32, R_X86_64_DTPOFF32, }, | |
194 | { BFD_RELOC_X86_64_GOTTPOFF, R_X86_64_GOTTPOFF, }, | |
195 | { BFD_RELOC_X86_64_TPOFF32, R_X86_64_TPOFF32, }, | |
d6ab8113 JB |
196 | { BFD_RELOC_64_PCREL, R_X86_64_PC64, }, |
197 | { BFD_RELOC_X86_64_GOTOFF64, R_X86_64_GOTOFF64, }, | |
198 | { BFD_RELOC_X86_64_GOTPC32, R_X86_64_GOTPC32, }, | |
7b81dfbb AJ |
199 | { BFD_RELOC_X86_64_GOT64, R_X86_64_GOT64, }, |
200 | { BFD_RELOC_X86_64_GOTPCREL64,R_X86_64_GOTPCREL64, }, | |
201 | { BFD_RELOC_X86_64_GOTPC64, R_X86_64_GOTPC64, }, | |
202 | { BFD_RELOC_X86_64_GOTPLT64, R_X86_64_GOTPLT64, }, | |
203 | { BFD_RELOC_X86_64_PLTOFF64, R_X86_64_PLTOFF64, }, | |
67a4f2b7 AO |
204 | { BFD_RELOC_X86_64_GOTPC32_TLSDESC, R_X86_64_GOTPC32_TLSDESC, }, |
205 | { BFD_RELOC_X86_64_TLSDESC_CALL, R_X86_64_TLSDESC_CALL, }, | |
206 | { BFD_RELOC_X86_64_TLSDESC, R_X86_64_TLSDESC, }, | |
fe4770f4 AJ |
207 | { BFD_RELOC_VTABLE_INHERIT, R_X86_64_GNU_VTINHERIT, }, |
208 | { BFD_RELOC_VTABLE_ENTRY, R_X86_64_GNU_VTENTRY, }, | |
8d88c4ca NC |
209 | }; |
210 | ||
67a4f2b7 AO |
211 | static reloc_howto_type * |
212 | elf64_x86_64_rtype_to_howto (bfd *abfd, unsigned r_type) | |
213 | { | |
214 | unsigned i; | |
215 | ||
216 | if (r_type < (unsigned int) R_X86_64_GNU_VTINHERIT | |
217 | || r_type >= (unsigned int) R_X86_64_max) | |
218 | { | |
219 | if (r_type >= (unsigned int) R_X86_64_standard) | |
220 | { | |
221 | (*_bfd_error_handler) (_("%B: invalid relocation type %d"), | |
222 | abfd, (int) r_type); | |
223 | r_type = R_X86_64_NONE; | |
224 | } | |
225 | i = r_type; | |
226 | } | |
227 | else | |
228 | i = r_type - (unsigned int) R_X86_64_vt_offset; | |
229 | BFD_ASSERT (x86_64_elf_howto_table[i].type == r_type); | |
230 | return &x86_64_elf_howto_table[i]; | |
231 | } | |
8d88c4ca NC |
232 | |
233 | /* Given a BFD reloc type, return a HOWTO structure. */ | |
234 | static reloc_howto_type * | |
67a4f2b7 | 235 | elf64_x86_64_reloc_type_lookup (bfd *abfd, |
27482721 | 236 | bfd_reloc_code_real_type code) |
8d88c4ca NC |
237 | { |
238 | unsigned int i; | |
27482721 | 239 | |
8d88c4ca NC |
240 | for (i = 0; i < sizeof (x86_64_reloc_map) / sizeof (struct elf_reloc_map); |
241 | i++) | |
242 | { | |
243 | if (x86_64_reloc_map[i].bfd_reloc_val == code) | |
67a4f2b7 AO |
244 | return elf64_x86_64_rtype_to_howto (abfd, |
245 | x86_64_reloc_map[i].elf_reloc_val); | |
8d88c4ca NC |
246 | } |
247 | return 0; | |
248 | } | |
249 | ||
157090f7 AM |
250 | static reloc_howto_type * |
251 | elf64_x86_64_reloc_name_lookup (bfd *abfd ATTRIBUTE_UNUSED, | |
252 | const char *r_name) | |
253 | { | |
254 | unsigned int i; | |
255 | ||
256 | for (i = 0; | |
257 | i < (sizeof (x86_64_elf_howto_table) | |
258 | / sizeof (x86_64_elf_howto_table[0])); | |
259 | i++) | |
260 | if (x86_64_elf_howto_table[i].name != NULL | |
261 | && strcasecmp (x86_64_elf_howto_table[i].name, r_name) == 0) | |
262 | return &x86_64_elf_howto_table[i]; | |
263 | ||
264 | return NULL; | |
265 | } | |
266 | ||
8d88c4ca | 267 | /* Given an x86_64 ELF reloc type, fill in an arelent structure. */ |
8da6118f | 268 | |
8d88c4ca | 269 | static void |
27482721 AJ |
270 | elf64_x86_64_info_to_howto (bfd *abfd ATTRIBUTE_UNUSED, arelent *cache_ptr, |
271 | Elf_Internal_Rela *dst) | |
8d88c4ca | 272 | { |
67a4f2b7 | 273 | unsigned r_type; |
8d88c4ca NC |
274 | |
275 | r_type = ELF64_R_TYPE (dst->r_info); | |
67a4f2b7 | 276 | cache_ptr->howto = elf64_x86_64_rtype_to_howto (abfd, r_type); |
8d88c4ca NC |
277 | BFD_ASSERT (r_type == cache_ptr->howto->type); |
278 | } | |
70256ad8 | 279 | \f |
3bab7989 | 280 | /* Support for core dump NOTE sections. */ |
b34976b6 | 281 | static bfd_boolean |
27482721 | 282 | elf64_x86_64_grok_prstatus (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
283 | { |
284 | int offset; | |
eea6121a | 285 | size_t size; |
3bab7989 ML |
286 | |
287 | switch (note->descsz) | |
288 | { | |
289 | default: | |
b34976b6 | 290 | return FALSE; |
3bab7989 ML |
291 | |
292 | case 336: /* sizeof(istruct elf_prstatus) on Linux/x86_64 */ | |
293 | /* pr_cursig */ | |
cedb70c5 | 294 | elf_tdata (abfd)->core_signal |
3bab7989 ML |
295 | = bfd_get_16 (abfd, note->descdata + 12); |
296 | ||
297 | /* pr_pid */ | |
cedb70c5 | 298 | elf_tdata (abfd)->core_pid |
3bab7989 ML |
299 | = bfd_get_32 (abfd, note->descdata + 32); |
300 | ||
301 | /* pr_reg */ | |
302 | offset = 112; | |
eea6121a | 303 | size = 216; |
3bab7989 ML |
304 | |
305 | break; | |
306 | } | |
307 | ||
308 | /* Make a ".reg/999" section. */ | |
309 | return _bfd_elfcore_make_pseudosection (abfd, ".reg", | |
eea6121a | 310 | size, note->descpos + offset); |
3bab7989 ML |
311 | } |
312 | ||
b34976b6 | 313 | static bfd_boolean |
27482721 | 314 | elf64_x86_64_grok_psinfo (bfd *abfd, Elf_Internal_Note *note) |
3bab7989 ML |
315 | { |
316 | switch (note->descsz) | |
317 | { | |
318 | default: | |
b34976b6 | 319 | return FALSE; |
3bab7989 ML |
320 | |
321 | case 136: /* sizeof(struct elf_prpsinfo) on Linux/x86_64 */ | |
322 | elf_tdata (abfd)->core_program | |
323 | = _bfd_elfcore_strndup (abfd, note->descdata + 40, 16); | |
324 | elf_tdata (abfd)->core_command | |
325 | = _bfd_elfcore_strndup (abfd, note->descdata + 56, 80); | |
326 | } | |
327 | ||
328 | /* Note that for some reason, a spurious space is tacked | |
329 | onto the end of the args in some (at least one anyway) | |
330 | implementations, so strip it off if it exists. */ | |
331 | ||
332 | { | |
333 | char *command = elf_tdata (abfd)->core_command; | |
334 | int n = strlen (command); | |
335 | ||
336 | if (0 < n && command[n - 1] == ' ') | |
337 | command[n - 1] = '\0'; | |
338 | } | |
339 | ||
b34976b6 | 340 | return TRUE; |
3bab7989 ML |
341 | } |
342 | \f | |
407443a3 | 343 | /* Functions for the x86-64 ELF linker. */ |
70256ad8 | 344 | |
407443a3 | 345 | /* The name of the dynamic interpreter. This is put in the .interp |
70256ad8 AJ |
346 | section. */ |
347 | ||
407443a3 | 348 | #define ELF_DYNAMIC_INTERPRETER "/lib/ld64.so.1" |
70256ad8 | 349 | |
d40d037c AJ |
350 | /* If ELIMINATE_COPY_RELOCS is non-zero, the linker will try to avoid |
351 | copying dynamic variables from a shared lib into an app's dynbss | |
352 | section, and instead use a dynamic relocation to point into the | |
353 | shared lib. */ | |
354 | #define ELIMINATE_COPY_RELOCS 1 | |
355 | ||
70256ad8 AJ |
356 | /* The size in bytes of an entry in the global offset table. */ |
357 | ||
358 | #define GOT_ENTRY_SIZE 8 | |
8d88c4ca | 359 | |
70256ad8 | 360 | /* The size in bytes of an entry in the procedure linkage table. */ |
8d88c4ca | 361 | |
70256ad8 AJ |
362 | #define PLT_ENTRY_SIZE 16 |
363 | ||
364 | /* The first entry in a procedure linkage table looks like this. See the | |
365 | SVR4 ABI i386 supplement and the x86-64 ABI to see how this works. */ | |
366 | ||
367 | static const bfd_byte elf64_x86_64_plt0_entry[PLT_ENTRY_SIZE] = | |
368 | { | |
653165cc AJ |
369 | 0xff, 0x35, 8, 0, 0, 0, /* pushq GOT+8(%rip) */ |
370 | 0xff, 0x25, 16, 0, 0, 0, /* jmpq *GOT+16(%rip) */ | |
10efb593 | 371 | 0x0f, 0x1f, 0x40, 0x00 /* nopl 0(%rax) */ |
70256ad8 AJ |
372 | }; |
373 | ||
374 | /* Subsequent entries in a procedure linkage table look like this. */ | |
375 | ||
376 | static const bfd_byte elf64_x86_64_plt_entry[PLT_ENTRY_SIZE] = | |
377 | { | |
653165cc | 378 | 0xff, 0x25, /* jmpq *name@GOTPC(%rip) */ |
407443a3 | 379 | 0, 0, 0, 0, /* replaced with offset to this symbol in .got. */ |
653165cc | 380 | 0x68, /* pushq immediate */ |
70256ad8 AJ |
381 | 0, 0, 0, 0, /* replaced with index into relocation table. */ |
382 | 0xe9, /* jmp relative */ | |
383 | 0, 0, 0, 0 /* replaced with offset to start of .plt0. */ | |
384 | }; | |
385 | ||
386 | /* The x86-64 linker needs to keep track of the number of relocs that | |
985142a4 | 387 | it decides to copy as dynamic relocs in check_relocs for each symbol. |
c434dee6 AJ |
388 | This is so that it can later discard them if they are found to be |
389 | unnecessary. We store the information in a field extending the | |
390 | regular ELF linker hash table. */ | |
70256ad8 | 391 | |
c434dee6 | 392 | struct elf64_x86_64_dyn_relocs |
70256ad8 AJ |
393 | { |
394 | /* Next section. */ | |
c434dee6 AJ |
395 | struct elf64_x86_64_dyn_relocs *next; |
396 | ||
397 | /* The input section of the reloc. */ | |
398 | asection *sec; | |
399 | ||
400 | /* Total number of relocs copied for the input section. */ | |
70256ad8 | 401 | bfd_size_type count; |
c434dee6 AJ |
402 | |
403 | /* Number of pc-relative relocs copied for the input section. */ | |
404 | bfd_size_type pc_count; | |
70256ad8 AJ |
405 | }; |
406 | ||
407 | /* x86-64 ELF linker hash entry. */ | |
408 | ||
409 | struct elf64_x86_64_link_hash_entry | |
410 | { | |
c434dee6 | 411 | struct elf_link_hash_entry elf; |
70256ad8 | 412 | |
c434dee6 AJ |
413 | /* Track dynamic relocs copied for this symbol. */ |
414 | struct elf64_x86_64_dyn_relocs *dyn_relocs; | |
bffbf940 JJ |
415 | |
416 | #define GOT_UNKNOWN 0 | |
417 | #define GOT_NORMAL 1 | |
418 | #define GOT_TLS_GD 2 | |
419 | #define GOT_TLS_IE 3 | |
67a4f2b7 AO |
420 | #define GOT_TLS_GDESC 4 |
421 | #define GOT_TLS_GD_BOTH_P(type) \ | |
422 | ((type) == (GOT_TLS_GD | GOT_TLS_GDESC)) | |
423 | #define GOT_TLS_GD_P(type) \ | |
424 | ((type) == GOT_TLS_GD || GOT_TLS_GD_BOTH_P (type)) | |
425 | #define GOT_TLS_GDESC_P(type) \ | |
426 | ((type) == GOT_TLS_GDESC || GOT_TLS_GD_BOTH_P (type)) | |
427 | #define GOT_TLS_GD_ANY_P(type) \ | |
428 | (GOT_TLS_GD_P (type) || GOT_TLS_GDESC_P (type)) | |
bffbf940 | 429 | unsigned char tls_type; |
67a4f2b7 AO |
430 | |
431 | /* Offset of the GOTPLT entry reserved for the TLS descriptor, | |
432 | starting at the end of the jump table. */ | |
433 | bfd_vma tlsdesc_got; | |
bffbf940 JJ |
434 | }; |
435 | ||
436 | #define elf64_x86_64_hash_entry(ent) \ | |
437 | ((struct elf64_x86_64_link_hash_entry *)(ent)) | |
438 | ||
439 | struct elf64_x86_64_obj_tdata | |
440 | { | |
441 | struct elf_obj_tdata root; | |
442 | ||
443 | /* tls_type for each local got entry. */ | |
444 | char *local_got_tls_type; | |
67a4f2b7 AO |
445 | |
446 | /* GOTPLT entries for TLS descriptors. */ | |
447 | bfd_vma *local_tlsdesc_gotent; | |
70256ad8 AJ |
448 | }; |
449 | ||
bffbf940 JJ |
450 | #define elf64_x86_64_tdata(abfd) \ |
451 | ((struct elf64_x86_64_obj_tdata *) (abfd)->tdata.any) | |
452 | ||
453 | #define elf64_x86_64_local_got_tls_type(abfd) \ | |
454 | (elf64_x86_64_tdata (abfd)->local_got_tls_type) | |
455 | ||
67a4f2b7 AO |
456 | #define elf64_x86_64_local_tlsdesc_gotent(abfd) \ |
457 | (elf64_x86_64_tdata (abfd)->local_tlsdesc_gotent) | |
bffbf940 | 458 | |
c434dee6 | 459 | /* x86-64 ELF linker hash table. */ |
8d88c4ca | 460 | |
407443a3 AJ |
461 | struct elf64_x86_64_link_hash_table |
462 | { | |
c434dee6 | 463 | struct elf_link_hash_table elf; |
70256ad8 | 464 | |
c434dee6 AJ |
465 | /* Short-cuts to get to dynamic linker sections. */ |
466 | asection *sgot; | |
467 | asection *sgotplt; | |
468 | asection *srelgot; | |
469 | asection *splt; | |
470 | asection *srelplt; | |
471 | asection *sdynbss; | |
472 | asection *srelbss; | |
70256ad8 | 473 | |
67a4f2b7 AO |
474 | /* The offset into splt of the PLT entry for the TLS descriptor |
475 | resolver. Special values are 0, if not necessary (or not found | |
476 | to be necessary yet), and -1 if needed but not determined | |
477 | yet. */ | |
478 | bfd_vma tlsdesc_plt; | |
479 | /* The offset into sgot of the GOT entry used by the PLT entry | |
480 | above. */ | |
481 | bfd_vma tlsdesc_got; | |
482 | ||
bffbf940 JJ |
483 | union { |
484 | bfd_signed_vma refcount; | |
485 | bfd_vma offset; | |
486 | } tls_ld_got; | |
487 | ||
67a4f2b7 AO |
488 | /* The amount of space used by the jump slots in the GOT. */ |
489 | bfd_vma sgotplt_jump_table_size; | |
490 | ||
c434dee6 AJ |
491 | /* Small local sym to section mapping cache. */ |
492 | struct sym_sec_cache sym_sec; | |
493 | }; | |
70256ad8 AJ |
494 | |
495 | /* Get the x86-64 ELF linker hash table from a link_info structure. */ | |
8d88c4ca NC |
496 | |
497 | #define elf64_x86_64_hash_table(p) \ | |
498 | ((struct elf64_x86_64_link_hash_table *) ((p)->hash)) | |
499 | ||
67a4f2b7 AO |
500 | #define elf64_x86_64_compute_jump_table_size(htab) \ |
501 | ((htab)->srelplt->reloc_count * GOT_ENTRY_SIZE) | |
502 | ||
407443a3 | 503 | /* Create an entry in an x86-64 ELF linker hash table. */ |
70256ad8 AJ |
504 | |
505 | static struct bfd_hash_entry * | |
27482721 AJ |
506 | link_hash_newfunc (struct bfd_hash_entry *entry, struct bfd_hash_table *table, |
507 | const char *string) | |
70256ad8 | 508 | { |
70256ad8 | 509 | /* Allocate the structure if it has not already been allocated by a |
c434dee6 AJ |
510 | subclass. */ |
511 | if (entry == NULL) | |
512 | { | |
513 | entry = bfd_hash_allocate (table, | |
514 | sizeof (struct elf64_x86_64_link_hash_entry)); | |
515 | if (entry == NULL) | |
516 | return entry; | |
517 | } | |
70256ad8 AJ |
518 | |
519 | /* Call the allocation method of the superclass. */ | |
c434dee6 AJ |
520 | entry = _bfd_elf_link_hash_newfunc (entry, table, string); |
521 | if (entry != NULL) | |
70256ad8 | 522 | { |
c434dee6 AJ |
523 | struct elf64_x86_64_link_hash_entry *eh; |
524 | ||
525 | eh = (struct elf64_x86_64_link_hash_entry *) entry; | |
526 | eh->dyn_relocs = NULL; | |
bffbf940 | 527 | eh->tls_type = GOT_UNKNOWN; |
67a4f2b7 | 528 | eh->tlsdesc_got = (bfd_vma) -1; |
70256ad8 AJ |
529 | } |
530 | ||
c434dee6 | 531 | return entry; |
70256ad8 AJ |
532 | } |
533 | ||
8d88c4ca NC |
534 | /* Create an X86-64 ELF linker hash table. */ |
535 | ||
536 | static struct bfd_link_hash_table * | |
27482721 | 537 | elf64_x86_64_link_hash_table_create (bfd *abfd) |
8d88c4ca NC |
538 | { |
539 | struct elf64_x86_64_link_hash_table *ret; | |
dc810e39 | 540 | bfd_size_type amt = sizeof (struct elf64_x86_64_link_hash_table); |
8d88c4ca | 541 | |
e2d34d7d | 542 | ret = (struct elf64_x86_64_link_hash_table *) bfd_malloc (amt); |
c434dee6 | 543 | if (ret == NULL) |
8d88c4ca NC |
544 | return NULL; |
545 | ||
66eb6687 AM |
546 | if (!_bfd_elf_link_hash_table_init (&ret->elf, abfd, link_hash_newfunc, |
547 | sizeof (struct elf64_x86_64_link_hash_entry))) | |
8d88c4ca | 548 | { |
e2d34d7d | 549 | free (ret); |
8d88c4ca NC |
550 | return NULL; |
551 | } | |
552 | ||
c434dee6 AJ |
553 | ret->sgot = NULL; |
554 | ret->sgotplt = NULL; | |
555 | ret->srelgot = NULL; | |
556 | ret->splt = NULL; | |
557 | ret->srelplt = NULL; | |
558 | ret->sdynbss = NULL; | |
559 | ret->srelbss = NULL; | |
560 | ret->sym_sec.abfd = NULL; | |
67a4f2b7 AO |
561 | ret->tlsdesc_plt = 0; |
562 | ret->tlsdesc_got = 0; | |
bffbf940 | 563 | ret->tls_ld_got.refcount = 0; |
67a4f2b7 | 564 | ret->sgotplt_jump_table_size = 0; |
c434dee6 AJ |
565 | |
566 | return &ret->elf.root; | |
567 | } | |
568 | ||
569 | /* Create .got, .gotplt, and .rela.got sections in DYNOBJ, and set up | |
570 | shortcuts to them in our hash table. */ | |
571 | ||
b34976b6 | 572 | static bfd_boolean |
27482721 | 573 | create_got_section (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
574 | { |
575 | struct elf64_x86_64_link_hash_table *htab; | |
576 | ||
577 | if (! _bfd_elf_create_got_section (dynobj, info)) | |
b34976b6 | 578 | return FALSE; |
c434dee6 AJ |
579 | |
580 | htab = elf64_x86_64_hash_table (info); | |
581 | htab->sgot = bfd_get_section_by_name (dynobj, ".got"); | |
582 | htab->sgotplt = bfd_get_section_by_name (dynobj, ".got.plt"); | |
583 | if (!htab->sgot || !htab->sgotplt) | |
584 | abort (); | |
585 | ||
3496cb2a L |
586 | htab->srelgot = bfd_make_section_with_flags (dynobj, ".rela.got", |
587 | (SEC_ALLOC | SEC_LOAD | |
588 | | SEC_HAS_CONTENTS | |
589 | | SEC_IN_MEMORY | |
590 | | SEC_LINKER_CREATED | |
591 | | SEC_READONLY)); | |
c434dee6 | 592 | if (htab->srelgot == NULL |
c434dee6 | 593 | || ! bfd_set_section_alignment (dynobj, htab->srelgot, 3)) |
b34976b6 AM |
594 | return FALSE; |
595 | return TRUE; | |
c434dee6 AJ |
596 | } |
597 | ||
598 | /* Create .plt, .rela.plt, .got, .got.plt, .rela.got, .dynbss, and | |
599 | .rela.bss sections in DYNOBJ, and set up shortcuts to them in our | |
600 | hash table. */ | |
601 | ||
b34976b6 | 602 | static bfd_boolean |
27482721 | 603 | elf64_x86_64_create_dynamic_sections (bfd *dynobj, struct bfd_link_info *info) |
c434dee6 AJ |
604 | { |
605 | struct elf64_x86_64_link_hash_table *htab; | |
606 | ||
607 | htab = elf64_x86_64_hash_table (info); | |
608 | if (!htab->sgot && !create_got_section (dynobj, info)) | |
b34976b6 | 609 | return FALSE; |
c434dee6 AJ |
610 | |
611 | if (!_bfd_elf_create_dynamic_sections (dynobj, info)) | |
b34976b6 | 612 | return FALSE; |
c434dee6 AJ |
613 | |
614 | htab->splt = bfd_get_section_by_name (dynobj, ".plt"); | |
615 | htab->srelplt = bfd_get_section_by_name (dynobj, ".rela.plt"); | |
616 | htab->sdynbss = bfd_get_section_by_name (dynobj, ".dynbss"); | |
617 | if (!info->shared) | |
618 | htab->srelbss = bfd_get_section_by_name (dynobj, ".rela.bss"); | |
619 | ||
620 | if (!htab->splt || !htab->srelplt || !htab->sdynbss | |
621 | || (!info->shared && !htab->srelbss)) | |
622 | abort (); | |
623 | ||
b34976b6 | 624 | return TRUE; |
c434dee6 AJ |
625 | } |
626 | ||
627 | /* Copy the extra info we tack onto an elf_link_hash_entry. */ | |
628 | ||
629 | static void | |
fcfa13d2 | 630 | elf64_x86_64_copy_indirect_symbol (struct bfd_link_info *info, |
27482721 AJ |
631 | struct elf_link_hash_entry *dir, |
632 | struct elf_link_hash_entry *ind) | |
c434dee6 AJ |
633 | { |
634 | struct elf64_x86_64_link_hash_entry *edir, *eind; | |
635 | ||
636 | edir = (struct elf64_x86_64_link_hash_entry *) dir; | |
637 | eind = (struct elf64_x86_64_link_hash_entry *) ind; | |
638 | ||
639 | if (eind->dyn_relocs != NULL) | |
640 | { | |
641 | if (edir->dyn_relocs != NULL) | |
642 | { | |
643 | struct elf64_x86_64_dyn_relocs **pp; | |
644 | struct elf64_x86_64_dyn_relocs *p; | |
645 | ||
fcfa13d2 | 646 | /* Add reloc counts against the indirect sym to the direct sym |
c434dee6 AJ |
647 | list. Merge any entries against the same section. */ |
648 | for (pp = &eind->dyn_relocs; (p = *pp) != NULL; ) | |
649 | { | |
650 | struct elf64_x86_64_dyn_relocs *q; | |
651 | ||
652 | for (q = edir->dyn_relocs; q != NULL; q = q->next) | |
653 | if (q->sec == p->sec) | |
654 | { | |
655 | q->pc_count += p->pc_count; | |
656 | q->count += p->count; | |
657 | *pp = p->next; | |
658 | break; | |
659 | } | |
660 | if (q == NULL) | |
661 | pp = &p->next; | |
662 | } | |
663 | *pp = edir->dyn_relocs; | |
664 | } | |
665 | ||
666 | edir->dyn_relocs = eind->dyn_relocs; | |
667 | eind->dyn_relocs = NULL; | |
668 | } | |
669 | ||
bffbf940 JJ |
670 | if (ind->root.type == bfd_link_hash_indirect |
671 | && dir->got.refcount <= 0) | |
672 | { | |
673 | edir->tls_type = eind->tls_type; | |
674 | eind->tls_type = GOT_UNKNOWN; | |
675 | } | |
676 | ||
d40d037c AJ |
677 | if (ELIMINATE_COPY_RELOCS |
678 | && ind->root.type != bfd_link_hash_indirect | |
f5385ebf AM |
679 | && dir->dynamic_adjusted) |
680 | { | |
681 | /* If called to transfer flags for a weakdef during processing | |
682 | of elf_adjust_dynamic_symbol, don't copy non_got_ref. | |
683 | We clear it ourselves for ELIMINATE_COPY_RELOCS. */ | |
684 | dir->ref_dynamic |= ind->ref_dynamic; | |
685 | dir->ref_regular |= ind->ref_regular; | |
686 | dir->ref_regular_nonweak |= ind->ref_regular_nonweak; | |
687 | dir->needs_plt |= ind->needs_plt; | |
688 | dir->pointer_equality_needed |= ind->pointer_equality_needed; | |
689 | } | |
d40d037c | 690 | else |
fcfa13d2 | 691 | _bfd_elf_link_hash_copy_indirect (info, dir, ind); |
8d88c4ca NC |
692 | } |
693 | ||
b34976b6 | 694 | static bfd_boolean |
27482721 | 695 | elf64_x86_64_mkobject (bfd *abfd) |
8d88c4ca | 696 | { |
bffbf940 | 697 | if (abfd->tdata.any == NULL) |
62d7a5f6 AM |
698 | { |
699 | bfd_size_type amt = sizeof (struct elf64_x86_64_obj_tdata); | |
700 | abfd->tdata.any = bfd_zalloc (abfd, amt); | |
701 | if (abfd->tdata.any == NULL) | |
702 | return FALSE; | |
703 | } | |
704 | return bfd_elf_mkobject (abfd); | |
bffbf940 JJ |
705 | } |
706 | ||
b34976b6 | 707 | static bfd_boolean |
27482721 | 708 | elf64_x86_64_elf_object_p (bfd *abfd) |
bffbf940 | 709 | { |
8d88c4ca NC |
710 | /* Set the right machine number for an x86-64 elf64 file. */ |
711 | bfd_default_set_arch_mach (abfd, bfd_arch_i386, bfd_mach_x86_64); | |
b34976b6 | 712 | return TRUE; |
8d88c4ca NC |
713 | } |
714 | ||
bffbf940 | 715 | static int |
3bfa9139 | 716 | elf64_x86_64_tls_transition (struct bfd_link_info *info, int r_type, |
2f3bf80a | 717 | struct elf_link_hash_entry *h) |
bffbf940 JJ |
718 | { |
719 | if (info->shared) | |
720 | return r_type; | |
721 | ||
722 | switch (r_type) | |
723 | { | |
724 | case R_X86_64_TLSGD: | |
67a4f2b7 AO |
725 | case R_X86_64_GOTPC32_TLSDESC: |
726 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 727 | case R_X86_64_GOTTPOFF: |
2f3bf80a | 728 | if (h == NULL) |
bffbf940 JJ |
729 | return R_X86_64_TPOFF32; |
730 | return R_X86_64_GOTTPOFF; | |
731 | case R_X86_64_TLSLD: | |
732 | return R_X86_64_TPOFF32; | |
733 | } | |
734 | ||
735 | return r_type; | |
736 | } | |
737 | ||
70256ad8 | 738 | /* Look through the relocs for a section during the first phase, and |
c434dee6 AJ |
739 | calculate needed space in the global offset table, procedure |
740 | linkage table, and dynamic reloc sections. */ | |
70256ad8 | 741 | |
b34976b6 | 742 | static bfd_boolean |
27482721 AJ |
743 | elf64_x86_64_check_relocs (bfd *abfd, struct bfd_link_info *info, asection *sec, |
744 | const Elf_Internal_Rela *relocs) | |
70256ad8 | 745 | { |
c434dee6 | 746 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
747 | Elf_Internal_Shdr *symtab_hdr; |
748 | struct elf_link_hash_entry **sym_hashes; | |
70256ad8 AJ |
749 | const Elf_Internal_Rela *rel; |
750 | const Elf_Internal_Rela *rel_end; | |
70256ad8 AJ |
751 | asection *sreloc; |
752 | ||
1049f94e | 753 | if (info->relocatable) |
b34976b6 | 754 | return TRUE; |
70256ad8 | 755 | |
c434dee6 | 756 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
757 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; |
758 | sym_hashes = elf_sym_hashes (abfd); | |
70256ad8 | 759 | |
c434dee6 AJ |
760 | sreloc = NULL; |
761 | ||
70256ad8 AJ |
762 | rel_end = relocs + sec->reloc_count; |
763 | for (rel = relocs; rel < rel_end; rel++) | |
764 | { | |
bffbf940 | 765 | unsigned int r_type; |
70256ad8 AJ |
766 | unsigned long r_symndx; |
767 | struct elf_link_hash_entry *h; | |
768 | ||
769 | r_symndx = ELF64_R_SYM (rel->r_info); | |
bffbf940 | 770 | r_type = ELF64_R_TYPE (rel->r_info); |
c434dee6 AJ |
771 | |
772 | if (r_symndx >= NUM_SHDR_ENTRIES (symtab_hdr)) | |
773 | { | |
d003868e AM |
774 | (*_bfd_error_handler) (_("%B: bad symbol index: %d"), |
775 | abfd, r_symndx); | |
b34976b6 | 776 | return FALSE; |
c434dee6 AJ |
777 | } |
778 | ||
70256ad8 AJ |
779 | if (r_symndx < symtab_hdr->sh_info) |
780 | h = NULL; | |
781 | else | |
71cb9464 L |
782 | { |
783 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; | |
784 | while (h->root.type == bfd_link_hash_indirect | |
785 | || h->root.type == bfd_link_hash_warning) | |
786 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
787 | } | |
70256ad8 | 788 | |
2f3bf80a | 789 | r_type = elf64_x86_64_tls_transition (info, r_type, h); |
bffbf940 | 790 | switch (r_type) |
70256ad8 | 791 | { |
bffbf940 JJ |
792 | case R_X86_64_TLSLD: |
793 | htab->tls_ld_got.refcount += 1; | |
794 | goto create_got; | |
795 | ||
796 | case R_X86_64_TPOFF32: | |
797 | if (info->shared) | |
70256ad8 | 798 | { |
bffbf940 | 799 | (*_bfd_error_handler) |
d003868e AM |
800 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
801 | abfd, | |
6610a52d L |
802 | x86_64_elf_howto_table[r_type].name, |
803 | (h) ? h->root.root.string : "a local symbol"); | |
bffbf940 | 804 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 805 | return FALSE; |
70256ad8 | 806 | } |
bffbf940 | 807 | break; |
c434dee6 | 808 | |
bffbf940 JJ |
809 | case R_X86_64_GOTTPOFF: |
810 | if (info->shared) | |
811 | info->flags |= DF_STATIC_TLS; | |
812 | /* Fall through */ | |
70256ad8 | 813 | |
bffbf940 JJ |
814 | case R_X86_64_GOT32: |
815 | case R_X86_64_GOTPCREL: | |
816 | case R_X86_64_TLSGD: | |
7b81dfbb AJ |
817 | case R_X86_64_GOT64: |
818 | case R_X86_64_GOTPCREL64: | |
819 | case R_X86_64_GOTPLT64: | |
67a4f2b7 AO |
820 | case R_X86_64_GOTPC32_TLSDESC: |
821 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 JJ |
822 | /* This symbol requires a global offset table entry. */ |
823 | { | |
824 | int tls_type, old_tls_type; | |
825 | ||
826 | switch (r_type) | |
827 | { | |
828 | default: tls_type = GOT_NORMAL; break; | |
829 | case R_X86_64_TLSGD: tls_type = GOT_TLS_GD; break; | |
830 | case R_X86_64_GOTTPOFF: tls_type = GOT_TLS_IE; break; | |
67a4f2b7 AO |
831 | case R_X86_64_GOTPC32_TLSDESC: |
832 | case R_X86_64_TLSDESC_CALL: | |
833 | tls_type = GOT_TLS_GDESC; break; | |
bffbf940 JJ |
834 | } |
835 | ||
836 | if (h != NULL) | |
837 | { | |
7b81dfbb AJ |
838 | if (r_type == R_X86_64_GOTPLT64) |
839 | { | |
840 | /* This relocation indicates that we also need | |
841 | a PLT entry, as this is a function. We don't need | |
842 | a PLT entry for local symbols. */ | |
843 | h->needs_plt = 1; | |
844 | h->plt.refcount += 1; | |
845 | } | |
bffbf940 JJ |
846 | h->got.refcount += 1; |
847 | old_tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
848 | } | |
849 | else | |
850 | { | |
851 | bfd_signed_vma *local_got_refcounts; | |
852 | ||
853 | /* This is a global offset table entry for a local symbol. */ | |
854 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
855 | if (local_got_refcounts == NULL) | |
856 | { | |
857 | bfd_size_type size; | |
858 | ||
859 | size = symtab_hdr->sh_info; | |
67a4f2b7 AO |
860 | size *= sizeof (bfd_signed_vma) |
861 | + sizeof (bfd_vma) + sizeof (char); | |
bffbf940 JJ |
862 | local_got_refcounts = ((bfd_signed_vma *) |
863 | bfd_zalloc (abfd, size)); | |
864 | if (local_got_refcounts == NULL) | |
b34976b6 | 865 | return FALSE; |
bffbf940 | 866 | elf_local_got_refcounts (abfd) = local_got_refcounts; |
67a4f2b7 AO |
867 | elf64_x86_64_local_tlsdesc_gotent (abfd) |
868 | = (bfd_vma *) (local_got_refcounts + symtab_hdr->sh_info); | |
bffbf940 | 869 | elf64_x86_64_local_got_tls_type (abfd) |
67a4f2b7 | 870 | = (char *) (local_got_refcounts + 2 * symtab_hdr->sh_info); |
bffbf940 JJ |
871 | } |
872 | local_got_refcounts[r_symndx] += 1; | |
873 | old_tls_type | |
874 | = elf64_x86_64_local_got_tls_type (abfd) [r_symndx]; | |
875 | } | |
876 | ||
877 | /* If a TLS symbol is accessed using IE at least once, | |
878 | there is no point to use dynamic model for it. */ | |
879 | if (old_tls_type != tls_type && old_tls_type != GOT_UNKNOWN | |
67a4f2b7 AO |
880 | && (! GOT_TLS_GD_ANY_P (old_tls_type) |
881 | || tls_type != GOT_TLS_IE)) | |
bffbf940 | 882 | { |
67a4f2b7 | 883 | if (old_tls_type == GOT_TLS_IE && GOT_TLS_GD_ANY_P (tls_type)) |
bffbf940 | 884 | tls_type = old_tls_type; |
67a4f2b7 AO |
885 | else if (GOT_TLS_GD_ANY_P (old_tls_type) |
886 | && GOT_TLS_GD_ANY_P (tls_type)) | |
887 | tls_type |= old_tls_type; | |
bffbf940 JJ |
888 | else |
889 | { | |
890 | (*_bfd_error_handler) | |
d003868e AM |
891 | (_("%B: %s' accessed both as normal and thread local symbol"), |
892 | abfd, h ? h->root.root.string : "<local>"); | |
b34976b6 | 893 | return FALSE; |
bffbf940 JJ |
894 | } |
895 | } | |
896 | ||
897 | if (old_tls_type != tls_type) | |
898 | { | |
899 | if (h != NULL) | |
900 | elf64_x86_64_hash_entry (h)->tls_type = tls_type; | |
901 | else | |
902 | elf64_x86_64_local_got_tls_type (abfd) [r_symndx] = tls_type; | |
903 | } | |
904 | } | |
c434dee6 AJ |
905 | /* Fall through */ |
906 | ||
d6ab8113 JB |
907 | case R_X86_64_GOTOFF64: |
908 | case R_X86_64_GOTPC32: | |
7b81dfbb | 909 | case R_X86_64_GOTPC64: |
bffbf940 | 910 | create_got: |
c434dee6 AJ |
911 | if (htab->sgot == NULL) |
912 | { | |
913 | if (htab->elf.dynobj == NULL) | |
914 | htab->elf.dynobj = abfd; | |
915 | if (!create_got_section (htab->elf.dynobj, info)) | |
b34976b6 | 916 | return FALSE; |
c434dee6 | 917 | } |
70256ad8 AJ |
918 | break; |
919 | ||
920 | case R_X86_64_PLT32: | |
921 | /* This symbol requires a procedure linkage table entry. We | |
407443a3 AJ |
922 | actually build the entry in adjust_dynamic_symbol, |
923 | because this might be a case of linking PIC code which is | |
924 | never referenced by a dynamic object, in which case we | |
925 | don't need to generate a procedure linkage table entry | |
926 | after all. */ | |
70256ad8 AJ |
927 | |
928 | /* If this is a local symbol, we resolve it directly without | |
407443a3 | 929 | creating a procedure linkage table entry. */ |
70256ad8 AJ |
930 | if (h == NULL) |
931 | continue; | |
932 | ||
f5385ebf | 933 | h->needs_plt = 1; |
51b64d56 | 934 | h->plt.refcount += 1; |
70256ad8 AJ |
935 | break; |
936 | ||
7b81dfbb AJ |
937 | case R_X86_64_PLTOFF64: |
938 | /* This tries to form the 'address' of a function relative | |
939 | to GOT. For global symbols we need a PLT entry. */ | |
940 | if (h != NULL) | |
941 | { | |
942 | h->needs_plt = 1; | |
943 | h->plt.refcount += 1; | |
944 | } | |
945 | goto create_got; | |
946 | ||
cc78d0af AJ |
947 | case R_X86_64_8: |
948 | case R_X86_64_16: | |
70256ad8 AJ |
949 | case R_X86_64_32: |
950 | case R_X86_64_32S: | |
1b71fb54 AJ |
951 | /* Let's help debug shared library creation. These relocs |
952 | cannot be used in shared libs. Don't error out for | |
953 | sections we don't care about, such as debug sections or | |
954 | non-constant sections. */ | |
955 | if (info->shared | |
956 | && (sec->flags & SEC_ALLOC) != 0 | |
957 | && (sec->flags & SEC_READONLY) != 0) | |
958 | { | |
959 | (*_bfd_error_handler) | |
d003868e AM |
960 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), |
961 | abfd, | |
6610a52d L |
962 | x86_64_elf_howto_table[r_type].name, |
963 | (h) ? h->root.root.string : "a local symbol"); | |
1b71fb54 | 964 | bfd_set_error (bfd_error_bad_value); |
b34976b6 | 965 | return FALSE; |
1b71fb54 AJ |
966 | } |
967 | /* Fall through. */ | |
968 | ||
c434dee6 AJ |
969 | case R_X86_64_PC8: |
970 | case R_X86_64_PC16: | |
70256ad8 | 971 | case R_X86_64_PC32: |
d6ab8113 | 972 | case R_X86_64_PC64: |
1b71fb54 | 973 | case R_X86_64_64: |
c434dee6 AJ |
974 | if (h != NULL && !info->shared) |
975 | { | |
976 | /* If this reloc is in a read-only section, we might | |
977 | need a copy reloc. We can't check reliably at this | |
978 | stage whether the section is read-only, as input | |
979 | sections have not yet been mapped to output sections. | |
980 | Tentatively set the flag for now, and correct in | |
981 | adjust_dynamic_symbol. */ | |
f5385ebf | 982 | h->non_got_ref = 1; |
c434dee6 AJ |
983 | |
984 | /* We may need a .plt entry if the function this reloc | |
985 | refers to is in a shared lib. */ | |
986 | h->plt.refcount += 1; | |
d6ab8113 | 987 | if (r_type != R_X86_64_PC32 && r_type != R_X86_64_PC64) |
f5385ebf | 988 | h->pointer_equality_needed = 1; |
c434dee6 | 989 | } |
70256ad8 AJ |
990 | |
991 | /* If we are creating a shared library, and this is a reloc | |
992 | against a global symbol, or a non PC relative reloc | |
993 | against a local symbol, then we need to copy the reloc | |
994 | into the shared library. However, if we are linking with | |
995 | -Bsymbolic, we do not need to copy a reloc against a | |
996 | global symbol which is defined in an object we are | |
407443a3 | 997 | including in the link (i.e., DEF_REGULAR is set). At |
70256ad8 AJ |
998 | this point we have not seen all the input files, so it is |
999 | possible that DEF_REGULAR is not set now but will be set | |
c434dee6 AJ |
1000 | later (it is never cleared). In case of a weak definition, |
1001 | DEF_REGULAR may be cleared later by a strong definition in | |
1002 | a shared library. We account for that possibility below by | |
1003 | storing information in the relocs_copied field of the hash | |
1004 | table entry. A similar situation occurs when creating | |
1005 | shared libraries and symbol visibility changes render the | |
1006 | symbol local. | |
1007 | ||
1008 | If on the other hand, we are creating an executable, we | |
1009 | may need to keep relocations for symbols satisfied by a | |
1010 | dynamic library if we manage to avoid copy relocs for the | |
1011 | symbol. */ | |
1012 | if ((info->shared | |
1013 | && (sec->flags & SEC_ALLOC) != 0 | |
bffbf940 JJ |
1014 | && (((r_type != R_X86_64_PC8) |
1015 | && (r_type != R_X86_64_PC16) | |
d6ab8113 JB |
1016 | && (r_type != R_X86_64_PC32) |
1017 | && (r_type != R_X86_64_PC64)) | |
c434dee6 | 1018 | || (h != NULL |
55255dae | 1019 | && (! SYMBOLIC_BIND (info, h) |
c434dee6 | 1020 | || h->root.type == bfd_link_hash_defweak |
f5385ebf | 1021 | || !h->def_regular)))) |
d40d037c AJ |
1022 | || (ELIMINATE_COPY_RELOCS |
1023 | && !info->shared | |
c434dee6 AJ |
1024 | && (sec->flags & SEC_ALLOC) != 0 |
1025 | && h != NULL | |
1026 | && (h->root.type == bfd_link_hash_defweak | |
f5385ebf | 1027 | || !h->def_regular))) |
70256ad8 | 1028 | { |
c434dee6 AJ |
1029 | struct elf64_x86_64_dyn_relocs *p; |
1030 | struct elf64_x86_64_dyn_relocs **head; | |
1031 | ||
1032 | /* We must copy these reloc types into the output file. | |
1033 | Create a reloc section in dynobj and make room for | |
1034 | this reloc. */ | |
70256ad8 AJ |
1035 | if (sreloc == NULL) |
1036 | { | |
1037 | const char *name; | |
c434dee6 | 1038 | bfd *dynobj; |
70256ad8 AJ |
1039 | |
1040 | name = (bfd_elf_string_from_elf_section | |
1041 | (abfd, | |
1042 | elf_elfheader (abfd)->e_shstrndx, | |
1043 | elf_section_data (sec)->rel_hdr.sh_name)); | |
1044 | if (name == NULL) | |
b34976b6 | 1045 | return FALSE; |
70256ad8 | 1046 | |
0112cd26 | 1047 | if (! CONST_STRNEQ (name, ".rela") |
c434dee6 AJ |
1048 | || strcmp (bfd_get_section_name (abfd, sec), |
1049 | name + 5) != 0) | |
1050 | { | |
1051 | (*_bfd_error_handler) | |
d003868e AM |
1052 | (_("%B: bad relocation section name `%s\'"), |
1053 | abfd, name); | |
c434dee6 AJ |
1054 | } |
1055 | ||
1056 | if (htab->elf.dynobj == NULL) | |
1057 | htab->elf.dynobj = abfd; | |
1058 | ||
1059 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
1060 | |
1061 | sreloc = bfd_get_section_by_name (dynobj, name); | |
1062 | if (sreloc == NULL) | |
1063 | { | |
1064 | flagword flags; | |
1065 | ||
70256ad8 AJ |
1066 | flags = (SEC_HAS_CONTENTS | SEC_READONLY |
1067 | | SEC_IN_MEMORY | SEC_LINKER_CREATED); | |
1068 | if ((sec->flags & SEC_ALLOC) != 0) | |
1069 | flags |= SEC_ALLOC | SEC_LOAD; | |
3496cb2a L |
1070 | sreloc = bfd_make_section_with_flags (dynobj, |
1071 | name, | |
1072 | flags); | |
70256ad8 | 1073 | if (sreloc == NULL |
cc78d0af | 1074 | || ! bfd_set_section_alignment (dynobj, sreloc, 3)) |
b34976b6 | 1075 | return FALSE; |
70256ad8 | 1076 | } |
c434dee6 | 1077 | elf_section_data (sec)->sreloc = sreloc; |
70256ad8 AJ |
1078 | } |
1079 | ||
c434dee6 AJ |
1080 | /* If this is a global symbol, we count the number of |
1081 | relocations we need for this symbol. */ | |
1082 | if (h != NULL) | |
70256ad8 | 1083 | { |
c434dee6 AJ |
1084 | head = &((struct elf64_x86_64_link_hash_entry *) h)->dyn_relocs; |
1085 | } | |
1086 | else | |
1087 | { | |
e81d3500 | 1088 | void **vpp; |
c434dee6 AJ |
1089 | /* Track dynamic relocs needed for local syms too. |
1090 | We really need local syms available to do this | |
1091 | easily. Oh well. */ | |
1092 | ||
1093 | asection *s; | |
1094 | s = bfd_section_from_r_symndx (abfd, &htab->sym_sec, | |
1095 | sec, r_symndx); | |
1096 | if (s == NULL) | |
b34976b6 | 1097 | return FALSE; |
70256ad8 | 1098 | |
e81d3500 DD |
1099 | /* Beware of type punned pointers vs strict aliasing |
1100 | rules. */ | |
1101 | vpp = &(elf_section_data (s)->local_dynrel); | |
1102 | head = (struct elf64_x86_64_dyn_relocs **)vpp; | |
c434dee6 | 1103 | } |
70256ad8 | 1104 | |
c434dee6 AJ |
1105 | p = *head; |
1106 | if (p == NULL || p->sec != sec) | |
1107 | { | |
1108 | bfd_size_type amt = sizeof *p; | |
1109 | p = ((struct elf64_x86_64_dyn_relocs *) | |
1110 | bfd_alloc (htab->elf.dynobj, amt)); | |
70256ad8 | 1111 | if (p == NULL) |
b34976b6 | 1112 | return FALSE; |
c434dee6 AJ |
1113 | p->next = *head; |
1114 | *head = p; | |
1115 | p->sec = sec; | |
1116 | p->count = 0; | |
1117 | p->pc_count = 0; | |
70256ad8 | 1118 | } |
c434dee6 AJ |
1119 | |
1120 | p->count += 1; | |
bffbf940 JJ |
1121 | if (r_type == R_X86_64_PC8 |
1122 | || r_type == R_X86_64_PC16 | |
d6ab8113 JB |
1123 | || r_type == R_X86_64_PC32 |
1124 | || r_type == R_X86_64_PC64) | |
c434dee6 | 1125 | p->pc_count += 1; |
70256ad8 AJ |
1126 | } |
1127 | break; | |
fe4770f4 AJ |
1128 | |
1129 | /* This relocation describes the C++ object vtable hierarchy. | |
1130 | Reconstruct it for later use during GC. */ | |
1131 | case R_X86_64_GNU_VTINHERIT: | |
c152c796 | 1132 | if (!bfd_elf_gc_record_vtinherit (abfd, sec, h, rel->r_offset)) |
b34976b6 | 1133 | return FALSE; |
fe4770f4 AJ |
1134 | break; |
1135 | ||
1136 | /* This relocation describes which C++ vtable entries are actually | |
1137 | used. Record for later use during GC. */ | |
1138 | case R_X86_64_GNU_VTENTRY: | |
c152c796 | 1139 | if (!bfd_elf_gc_record_vtentry (abfd, sec, h, rel->r_addend)) |
b34976b6 | 1140 | return FALSE; |
fe4770f4 | 1141 | break; |
c434dee6 AJ |
1142 | |
1143 | default: | |
1144 | break; | |
70256ad8 AJ |
1145 | } |
1146 | } | |
1147 | ||
b34976b6 | 1148 | return TRUE; |
70256ad8 AJ |
1149 | } |
1150 | ||
1151 | /* Return the section that should be marked against GC for a given | |
407443a3 | 1152 | relocation. */ |
70256ad8 AJ |
1153 | |
1154 | static asection * | |
27482721 | 1155 | elf64_x86_64_gc_mark_hook (asection *sec, |
07adf181 | 1156 | struct bfd_link_info *info, |
27482721 AJ |
1157 | Elf_Internal_Rela *rel, |
1158 | struct elf_link_hash_entry *h, | |
1159 | Elf_Internal_Sym *sym) | |
70256ad8 AJ |
1160 | { |
1161 | if (h != NULL) | |
07adf181 AM |
1162 | switch (ELF64_R_TYPE (rel->r_info)) |
1163 | { | |
1164 | case R_X86_64_GNU_VTINHERIT: | |
1165 | case R_X86_64_GNU_VTENTRY: | |
1166 | return NULL; | |
1167 | } | |
1168 | ||
1169 | return _bfd_elf_gc_mark_hook (sec, info, rel, h, sym); | |
70256ad8 AJ |
1170 | } |
1171 | ||
407443a3 | 1172 | /* Update the got entry reference counts for the section being removed. */ |
70256ad8 | 1173 | |
b34976b6 | 1174 | static bfd_boolean |
27482721 AJ |
1175 | elf64_x86_64_gc_sweep_hook (bfd *abfd, struct bfd_link_info *info, |
1176 | asection *sec, const Elf_Internal_Rela *relocs) | |
70256ad8 AJ |
1177 | { |
1178 | Elf_Internal_Shdr *symtab_hdr; | |
1179 | struct elf_link_hash_entry **sym_hashes; | |
1180 | bfd_signed_vma *local_got_refcounts; | |
1181 | const Elf_Internal_Rela *rel, *relend; | |
c434dee6 AJ |
1182 | |
1183 | elf_section_data (sec)->local_dynrel = NULL; | |
70256ad8 AJ |
1184 | |
1185 | symtab_hdr = &elf_tdata (abfd)->symtab_hdr; | |
1186 | sym_hashes = elf_sym_hashes (abfd); | |
1187 | local_got_refcounts = elf_local_got_refcounts (abfd); | |
1188 | ||
70256ad8 AJ |
1189 | relend = relocs + sec->reloc_count; |
1190 | for (rel = relocs; rel < relend; rel++) | |
26e41594 AM |
1191 | { |
1192 | unsigned long r_symndx; | |
1193 | unsigned int r_type; | |
1194 | struct elf_link_hash_entry *h = NULL; | |
70256ad8 | 1195 | |
26e41594 AM |
1196 | r_symndx = ELF64_R_SYM (rel->r_info); |
1197 | if (r_symndx >= symtab_hdr->sh_info) | |
1198 | { | |
1199 | struct elf64_x86_64_link_hash_entry *eh; | |
1200 | struct elf64_x86_64_dyn_relocs **pp; | |
1201 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1202 | |
26e41594 | 1203 | h = sym_hashes[r_symndx - symtab_hdr->sh_info]; |
3eb128b2 AM |
1204 | while (h->root.type == bfd_link_hash_indirect |
1205 | || h->root.type == bfd_link_hash_warning) | |
1206 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
26e41594 | 1207 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
c434dee6 | 1208 | |
26e41594 AM |
1209 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; pp = &p->next) |
1210 | if (p->sec == sec) | |
1211 | { | |
1212 | /* Everything must go for SEC. */ | |
1213 | *pp = p->next; | |
1214 | break; | |
1215 | } | |
1216 | } | |
c434dee6 | 1217 | |
26e41594 | 1218 | r_type = ELF64_R_TYPE (rel->r_info); |
2f3bf80a | 1219 | r_type = elf64_x86_64_tls_transition (info, r_type, h); |
26e41594 AM |
1220 | switch (r_type) |
1221 | { | |
1222 | case R_X86_64_TLSLD: | |
1223 | if (elf64_x86_64_hash_table (info)->tls_ld_got.refcount > 0) | |
1224 | elf64_x86_64_hash_table (info)->tls_ld_got.refcount -= 1; | |
1225 | break; | |
c434dee6 | 1226 | |
26e41594 | 1227 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
1228 | case R_X86_64_GOTPC32_TLSDESC: |
1229 | case R_X86_64_TLSDESC_CALL: | |
26e41594 AM |
1230 | case R_X86_64_GOTTPOFF: |
1231 | case R_X86_64_GOT32: | |
1232 | case R_X86_64_GOTPCREL: | |
7b81dfbb AJ |
1233 | case R_X86_64_GOT64: |
1234 | case R_X86_64_GOTPCREL64: | |
1235 | case R_X86_64_GOTPLT64: | |
26e41594 AM |
1236 | if (h != NULL) |
1237 | { | |
7b81dfbb AJ |
1238 | if (r_type == R_X86_64_GOTPLT64 && h->plt.refcount > 0) |
1239 | h->plt.refcount -= 1; | |
26e41594 AM |
1240 | if (h->got.refcount > 0) |
1241 | h->got.refcount -= 1; | |
1242 | } | |
1243 | else if (local_got_refcounts != NULL) | |
1244 | { | |
1245 | if (local_got_refcounts[r_symndx] > 0) | |
1246 | local_got_refcounts[r_symndx] -= 1; | |
1247 | } | |
1248 | break; | |
c434dee6 | 1249 | |
26e41594 AM |
1250 | case R_X86_64_8: |
1251 | case R_X86_64_16: | |
1252 | case R_X86_64_32: | |
1253 | case R_X86_64_64: | |
1254 | case R_X86_64_32S: | |
1255 | case R_X86_64_PC8: | |
1256 | case R_X86_64_PC16: | |
1257 | case R_X86_64_PC32: | |
d6ab8113 | 1258 | case R_X86_64_PC64: |
26e41594 AM |
1259 | if (info->shared) |
1260 | break; | |
1261 | /* Fall thru */ | |
c434dee6 | 1262 | |
26e41594 | 1263 | case R_X86_64_PLT32: |
7b81dfbb | 1264 | case R_X86_64_PLTOFF64: |
26e41594 AM |
1265 | if (h != NULL) |
1266 | { | |
1267 | if (h->plt.refcount > 0) | |
1268 | h->plt.refcount -= 1; | |
1269 | } | |
1270 | break; | |
70256ad8 | 1271 | |
26e41594 AM |
1272 | default: |
1273 | break; | |
1274 | } | |
1275 | } | |
70256ad8 | 1276 | |
b34976b6 | 1277 | return TRUE; |
70256ad8 AJ |
1278 | } |
1279 | ||
1280 | /* Adjust a symbol defined by a dynamic object and referenced by a | |
1281 | regular object. The current definition is in some section of the | |
1282 | dynamic object, but we're not including those sections. We have to | |
1283 | change the definition to something the rest of the link can | |
407443a3 | 1284 | understand. */ |
70256ad8 | 1285 | |
b34976b6 | 1286 | static bfd_boolean |
27482721 AJ |
1287 | elf64_x86_64_adjust_dynamic_symbol (struct bfd_link_info *info, |
1288 | struct elf_link_hash_entry *h) | |
70256ad8 | 1289 | { |
c434dee6 | 1290 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 1291 | asection *s; |
70256ad8 | 1292 | |
70256ad8 AJ |
1293 | /* If this is a function, put it in the procedure linkage table. We |
1294 | will fill in the contents of the procedure linkage table later, | |
1295 | when we know the address of the .got section. */ | |
1296 | if (h->type == STT_FUNC | |
f5385ebf | 1297 | || h->needs_plt) |
70256ad8 | 1298 | { |
c434dee6 | 1299 | if (h->plt.refcount <= 0 |
27482721 AJ |
1300 | || SYMBOL_CALLS_LOCAL (info, h) |
1301 | || (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT | |
1302 | && h->root.type == bfd_link_hash_undefweak)) | |
70256ad8 | 1303 | { |
70256ad8 AJ |
1304 | /* This case can occur if we saw a PLT32 reloc in an input |
1305 | file, but the symbol was never referred to by a dynamic | |
1306 | object, or if all references were garbage collected. In | |
1307 | such a case, we don't actually need to build a procedure | |
1308 | linkage table, and we can just do a PC32 reloc instead. */ | |
70256ad8 | 1309 | h->plt.offset = (bfd_vma) -1; |
f5385ebf | 1310 | h->needs_plt = 0; |
70256ad8 AJ |
1311 | } |
1312 | ||
b34976b6 | 1313 | return TRUE; |
70256ad8 | 1314 | } |
bbd7ec4a | 1315 | else |
c434dee6 AJ |
1316 | /* It's possible that we incorrectly decided a .plt reloc was |
1317 | needed for an R_X86_64_PC32 reloc to a non-function sym in | |
1318 | check_relocs. We can't decide accurately between function and | |
1319 | non-function syms in check-relocs; Objects loaded later in | |
1320 | the link may change h->type. So fix it now. */ | |
bbd7ec4a | 1321 | h->plt.offset = (bfd_vma) -1; |
70256ad8 AJ |
1322 | |
1323 | /* If this is a weak symbol, and there is a real definition, the | |
1324 | processor independent code will have arranged for us to see the | |
407443a3 | 1325 | real definition first, and we can just use the same value. */ |
f6e332e6 | 1326 | if (h->u.weakdef != NULL) |
70256ad8 | 1327 | { |
f6e332e6 AM |
1328 | BFD_ASSERT (h->u.weakdef->root.type == bfd_link_hash_defined |
1329 | || h->u.weakdef->root.type == bfd_link_hash_defweak); | |
1330 | h->root.u.def.section = h->u.weakdef->root.u.def.section; | |
1331 | h->root.u.def.value = h->u.weakdef->root.u.def.value; | |
d40d037c | 1332 | if (ELIMINATE_COPY_RELOCS || info->nocopyreloc) |
f6e332e6 | 1333 | h->non_got_ref = h->u.weakdef->non_got_ref; |
b34976b6 | 1334 | return TRUE; |
70256ad8 AJ |
1335 | } |
1336 | ||
1337 | /* This is a reference to a symbol defined by a dynamic object which | |
407443a3 | 1338 | is not a function. */ |
70256ad8 AJ |
1339 | |
1340 | /* If we are creating a shared library, we must presume that the | |
1341 | only references to the symbol are via the global offset table. | |
1342 | For such cases we need not do anything here; the relocations will | |
407443a3 | 1343 | be handled correctly by relocate_section. */ |
70256ad8 | 1344 | if (info->shared) |
b34976b6 | 1345 | return TRUE; |
70256ad8 AJ |
1346 | |
1347 | /* If there are no references to this symbol that do not use the | |
1348 | GOT, we don't need to generate a copy reloc. */ | |
f5385ebf | 1349 | if (!h->non_got_ref) |
b34976b6 | 1350 | return TRUE; |
70256ad8 | 1351 | |
c434dee6 AJ |
1352 | /* If -z nocopyreloc was given, we won't generate them either. */ |
1353 | if (info->nocopyreloc) | |
1354 | { | |
f5385ebf | 1355 | h->non_got_ref = 0; |
b34976b6 | 1356 | return TRUE; |
c434dee6 AJ |
1357 | } |
1358 | ||
d40d037c | 1359 | if (ELIMINATE_COPY_RELOCS) |
c434dee6 | 1360 | { |
d40d037c AJ |
1361 | struct elf64_x86_64_link_hash_entry * eh; |
1362 | struct elf64_x86_64_dyn_relocs *p; | |
c434dee6 | 1363 | |
d40d037c AJ |
1364 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1365 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1366 | { | |
1367 | s = p->sec->output_section; | |
1368 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1369 | break; | |
1370 | } | |
1371 | ||
1372 | /* If we didn't find any dynamic relocs in read-only sections, then | |
1373 | we'll be keeping the dynamic relocs and avoiding the copy reloc. */ | |
1374 | if (p == NULL) | |
1375 | { | |
f5385ebf | 1376 | h->non_got_ref = 0; |
d40d037c AJ |
1377 | return TRUE; |
1378 | } | |
c434dee6 AJ |
1379 | } |
1380 | ||
909272ee AM |
1381 | if (h->size == 0) |
1382 | { | |
1383 | (*_bfd_error_handler) (_("dynamic variable `%s' is zero size"), | |
1384 | h->root.root.string); | |
1385 | return TRUE; | |
1386 | } | |
1387 | ||
70256ad8 | 1388 | /* We must allocate the symbol in our .dynbss section, which will |
407443a3 | 1389 | become part of the .bss section of the executable. There will be |
70256ad8 AJ |
1390 | an entry for this symbol in the .dynsym section. The dynamic |
1391 | object will contain position independent code, so all references | |
1392 | from the dynamic object to this symbol will go through the global | |
1393 | offset table. The dynamic linker will use the .dynsym entry to | |
1394 | determine the address it must put in the global offset table, so | |
1395 | both the dynamic object and the regular object will refer to the | |
1396 | same memory location for the variable. */ | |
1397 | ||
c434dee6 | 1398 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
1399 | |
1400 | /* We must generate a R_X86_64_COPY reloc to tell the dynamic linker | |
1401 | to copy the initial value out of the dynamic object and into the | |
cedb70c5 | 1402 | runtime process image. */ |
70256ad8 AJ |
1403 | if ((h->root.u.def.section->flags & SEC_ALLOC) != 0) |
1404 | { | |
eea6121a | 1405 | htab->srelbss->size += sizeof (Elf64_External_Rela); |
f5385ebf | 1406 | h->needs_copy = 1; |
70256ad8 AJ |
1407 | } |
1408 | ||
c434dee6 | 1409 | s = htab->sdynbss; |
70256ad8 | 1410 | |
027297b7 | 1411 | return _bfd_elf_adjust_dynamic_copy (h, s); |
70256ad8 AJ |
1412 | } |
1413 | ||
c434dee6 AJ |
1414 | /* Allocate space in .plt, .got and associated reloc sections for |
1415 | dynamic relocs. */ | |
1416 | ||
b34976b6 | 1417 | static bfd_boolean |
27482721 | 1418 | allocate_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1419 | { |
1420 | struct bfd_link_info *info; | |
1421 | struct elf64_x86_64_link_hash_table *htab; | |
1422 | struct elf64_x86_64_link_hash_entry *eh; | |
1423 | struct elf64_x86_64_dyn_relocs *p; | |
1424 | ||
e92d460e | 1425 | if (h->root.type == bfd_link_hash_indirect) |
b34976b6 | 1426 | return TRUE; |
c434dee6 | 1427 | |
e92d460e AM |
1428 | if (h->root.type == bfd_link_hash_warning) |
1429 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1430 | ||
c434dee6 AJ |
1431 | info = (struct bfd_link_info *) inf; |
1432 | htab = elf64_x86_64_hash_table (info); | |
1433 | ||
1434 | if (htab->elf.dynamic_sections_created | |
27482721 | 1435 | && h->plt.refcount > 0) |
c434dee6 AJ |
1436 | { |
1437 | /* Make sure this symbol is output as a dynamic symbol. | |
1438 | Undefined weak syms won't yet be marked as dynamic. */ | |
1439 | if (h->dynindx == -1 | |
f5385ebf | 1440 | && !h->forced_local) |
c434dee6 | 1441 | { |
c152c796 | 1442 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1443 | return FALSE; |
c434dee6 AJ |
1444 | } |
1445 | ||
27482721 AJ |
1446 | if (info->shared |
1447 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (1, 0, h)) | |
c434dee6 AJ |
1448 | { |
1449 | asection *s = htab->splt; | |
1450 | ||
1451 | /* If this is the first .plt entry, make room for the special | |
1452 | first entry. */ | |
eea6121a AM |
1453 | if (s->size == 0) |
1454 | s->size += PLT_ENTRY_SIZE; | |
c434dee6 | 1455 | |
eea6121a | 1456 | h->plt.offset = s->size; |
c434dee6 AJ |
1457 | |
1458 | /* If this symbol is not defined in a regular file, and we are | |
1459 | not generating a shared library, then set the symbol to this | |
1460 | location in the .plt. This is required to make function | |
1461 | pointers compare as equal between the normal executable and | |
1462 | the shared library. */ | |
1463 | if (! info->shared | |
f5385ebf | 1464 | && !h->def_regular) |
c434dee6 AJ |
1465 | { |
1466 | h->root.u.def.section = s; | |
1467 | h->root.u.def.value = h->plt.offset; | |
1468 | } | |
1469 | ||
1470 | /* Make room for this entry. */ | |
eea6121a | 1471 | s->size += PLT_ENTRY_SIZE; |
c434dee6 AJ |
1472 | |
1473 | /* We also need to make an entry in the .got.plt section, which | |
1474 | will be placed in the .got section by the linker script. */ | |
eea6121a | 1475 | htab->sgotplt->size += GOT_ENTRY_SIZE; |
c434dee6 AJ |
1476 | |
1477 | /* We also need to make an entry in the .rela.plt section. */ | |
eea6121a | 1478 | htab->srelplt->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 1479 | htab->srelplt->reloc_count++; |
c434dee6 AJ |
1480 | } |
1481 | else | |
1482 | { | |
1483 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1484 | h->needs_plt = 0; |
c434dee6 AJ |
1485 | } |
1486 | } | |
1487 | else | |
1488 | { | |
1489 | h->plt.offset = (bfd_vma) -1; | |
f5385ebf | 1490 | h->needs_plt = 0; |
c434dee6 AJ |
1491 | } |
1492 | ||
67a4f2b7 AO |
1493 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1494 | eh->tlsdesc_got = (bfd_vma) -1; | |
1495 | ||
bffbf940 JJ |
1496 | /* If R_X86_64_GOTTPOFF symbol is now local to the binary, |
1497 | make it a R_X86_64_TPOFF32 requiring no GOT entry. */ | |
1498 | if (h->got.refcount > 0 | |
1499 | && !info->shared | |
1500 | && h->dynindx == -1 | |
1501 | && elf64_x86_64_hash_entry (h)->tls_type == GOT_TLS_IE) | |
1502 | h->got.offset = (bfd_vma) -1; | |
1503 | else if (h->got.refcount > 0) | |
c434dee6 AJ |
1504 | { |
1505 | asection *s; | |
b34976b6 | 1506 | bfd_boolean dyn; |
bffbf940 | 1507 | int tls_type = elf64_x86_64_hash_entry (h)->tls_type; |
c434dee6 AJ |
1508 | |
1509 | /* Make sure this symbol is output as a dynamic symbol. | |
1510 | Undefined weak syms won't yet be marked as dynamic. */ | |
1511 | if (h->dynindx == -1 | |
f5385ebf | 1512 | && !h->forced_local) |
c434dee6 | 1513 | { |
c152c796 | 1514 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1515 | return FALSE; |
c434dee6 AJ |
1516 | } |
1517 | ||
67a4f2b7 AO |
1518 | if (GOT_TLS_GDESC_P (tls_type)) |
1519 | { | |
1520 | eh->tlsdesc_got = htab->sgotplt->size | |
1521 | - elf64_x86_64_compute_jump_table_size (htab); | |
1522 | htab->sgotplt->size += 2 * GOT_ENTRY_SIZE; | |
1523 | h->got.offset = (bfd_vma) -2; | |
1524 | } | |
1525 | if (! GOT_TLS_GDESC_P (tls_type) | |
1526 | || GOT_TLS_GD_P (tls_type)) | |
1527 | { | |
1528 | s = htab->sgot; | |
1529 | h->got.offset = s->size; | |
1530 | s->size += GOT_ENTRY_SIZE; | |
1531 | if (GOT_TLS_GD_P (tls_type)) | |
1532 | s->size += GOT_ENTRY_SIZE; | |
1533 | } | |
c434dee6 | 1534 | dyn = htab->elf.dynamic_sections_created; |
bffbf940 JJ |
1535 | /* R_X86_64_TLSGD needs one dynamic relocation if local symbol |
1536 | and two if global. | |
1537 | R_X86_64_GOTTPOFF needs one dynamic relocation. */ | |
67a4f2b7 | 1538 | if ((GOT_TLS_GD_P (tls_type) && h->dynindx == -1) |
bffbf940 | 1539 | || tls_type == GOT_TLS_IE) |
eea6121a | 1540 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 | 1541 | else if (GOT_TLS_GD_P (tls_type)) |
eea6121a | 1542 | htab->srelgot->size += 2 * sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1543 | else if (! GOT_TLS_GDESC_P (tls_type) |
1544 | && (ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
1545 | || h->root.type != bfd_link_hash_undefweak) | |
27482721 AJ |
1546 | && (info->shared |
1547 | || WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, 0, h))) | |
eea6121a | 1548 | htab->srelgot->size += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
1549 | if (GOT_TLS_GDESC_P (tls_type)) |
1550 | { | |
1551 | htab->srelplt->size += sizeof (Elf64_External_Rela); | |
1552 | htab->tlsdesc_plt = (bfd_vma) -1; | |
1553 | } | |
c434dee6 AJ |
1554 | } |
1555 | else | |
1556 | h->got.offset = (bfd_vma) -1; | |
1557 | ||
c434dee6 | 1558 | if (eh->dyn_relocs == NULL) |
b34976b6 | 1559 | return TRUE; |
c434dee6 AJ |
1560 | |
1561 | /* In the shared -Bsymbolic case, discard space allocated for | |
1562 | dynamic pc-relative relocs against symbols which turn out to be | |
1563 | defined in regular objects. For the normal shared case, discard | |
1564 | space for pc-relative relocs that have become local due to symbol | |
1565 | visibility changes. */ | |
1566 | ||
1567 | if (info->shared) | |
1568 | { | |
27482721 AJ |
1569 | /* Relocs that use pc_count are those that appear on a call |
1570 | insn, or certain REL relocs that can generated via assembly. | |
1571 | We want calls to protected symbols to resolve directly to the | |
1572 | function rather than going via the plt. If people want | |
1573 | function pointer comparisons to work as expected then they | |
1574 | should avoid writing weird assembly. */ | |
1575 | if (SYMBOL_CALLS_LOCAL (info, h)) | |
c434dee6 AJ |
1576 | { |
1577 | struct elf64_x86_64_dyn_relocs **pp; | |
1578 | ||
1579 | for (pp = &eh->dyn_relocs; (p = *pp) != NULL; ) | |
1580 | { | |
1581 | p->count -= p->pc_count; | |
1582 | p->pc_count = 0; | |
1583 | if (p->count == 0) | |
1584 | *pp = p->next; | |
1585 | else | |
1586 | pp = &p->next; | |
1587 | } | |
1588 | } | |
4e795f50 AM |
1589 | |
1590 | /* Also discard relocs on undefined weak syms with non-default | |
1591 | visibility. */ | |
22d606e9 | 1592 | if (eh->dyn_relocs != NULL |
4e795f50 | 1593 | && h->root.type == bfd_link_hash_undefweak) |
22d606e9 AM |
1594 | { |
1595 | if (ELF_ST_VISIBILITY (h->other) != STV_DEFAULT) | |
1596 | eh->dyn_relocs = NULL; | |
1597 | ||
1598 | /* Make sure undefined weak symbols are output as a dynamic | |
1599 | symbol in PIEs. */ | |
1600 | else if (h->dynindx == -1 | |
1601 | && !h->forced_local) | |
1602 | { | |
1603 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) | |
1604 | return FALSE; | |
1605 | } | |
1606 | } | |
c434dee6 | 1607 | } |
d40d037c | 1608 | else if (ELIMINATE_COPY_RELOCS) |
c434dee6 AJ |
1609 | { |
1610 | /* For the non-shared case, discard space for relocs against | |
1611 | symbols which turn out to need copy relocs or are not | |
1612 | dynamic. */ | |
1613 | ||
f5385ebf AM |
1614 | if (!h->non_got_ref |
1615 | && ((h->def_dynamic | |
1616 | && !h->def_regular) | |
c434dee6 AJ |
1617 | || (htab->elf.dynamic_sections_created |
1618 | && (h->root.type == bfd_link_hash_undefweak | |
1619 | || h->root.type == bfd_link_hash_undefined)))) | |
1620 | { | |
1621 | /* Make sure this symbol is output as a dynamic symbol. | |
1622 | Undefined weak syms won't yet be marked as dynamic. */ | |
1623 | if (h->dynindx == -1 | |
f5385ebf | 1624 | && !h->forced_local) |
c434dee6 | 1625 | { |
c152c796 | 1626 | if (! bfd_elf_link_record_dynamic_symbol (info, h)) |
b34976b6 | 1627 | return FALSE; |
c434dee6 AJ |
1628 | } |
1629 | ||
1630 | /* If that succeeded, we know we'll be keeping all the | |
1631 | relocs. */ | |
1632 | if (h->dynindx != -1) | |
1633 | goto keep; | |
1634 | } | |
1635 | ||
1636 | eh->dyn_relocs = NULL; | |
1637 | ||
1638 | keep: ; | |
1639 | } | |
1640 | ||
1641 | /* Finally, allocate space. */ | |
1642 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1643 | { | |
1644 | asection *sreloc = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1645 | sreloc->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1646 | } |
1647 | ||
b34976b6 | 1648 | return TRUE; |
c434dee6 AJ |
1649 | } |
1650 | ||
1651 | /* Find any dynamic relocs that apply to read-only sections. */ | |
1652 | ||
b34976b6 | 1653 | static bfd_boolean |
27482721 | 1654 | readonly_dynrelocs (struct elf_link_hash_entry *h, void * inf) |
c434dee6 AJ |
1655 | { |
1656 | struct elf64_x86_64_link_hash_entry *eh; | |
1657 | struct elf64_x86_64_dyn_relocs *p; | |
1658 | ||
e92d460e AM |
1659 | if (h->root.type == bfd_link_hash_warning) |
1660 | h = (struct elf_link_hash_entry *) h->root.u.i.link; | |
1661 | ||
c434dee6 AJ |
1662 | eh = (struct elf64_x86_64_link_hash_entry *) h; |
1663 | for (p = eh->dyn_relocs; p != NULL; p = p->next) | |
1664 | { | |
1665 | asection *s = p->sec->output_section; | |
1666 | ||
1667 | if (s != NULL && (s->flags & SEC_READONLY) != 0) | |
1668 | { | |
1669 | struct bfd_link_info *info = (struct bfd_link_info *) inf; | |
1670 | ||
1671 | info->flags |= DF_TEXTREL; | |
1672 | ||
1673 | /* Not an error, just cut short the traversal. */ | |
b34976b6 | 1674 | return FALSE; |
c434dee6 AJ |
1675 | } |
1676 | } | |
b34976b6 | 1677 | return TRUE; |
c434dee6 AJ |
1678 | } |
1679 | ||
70256ad8 AJ |
1680 | /* Set the sizes of the dynamic sections. */ |
1681 | ||
b34976b6 | 1682 | static bfd_boolean |
27482721 AJ |
1683 | elf64_x86_64_size_dynamic_sections (bfd *output_bfd ATTRIBUTE_UNUSED, |
1684 | struct bfd_link_info *info) | |
70256ad8 | 1685 | { |
c434dee6 | 1686 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
1687 | bfd *dynobj; |
1688 | asection *s; | |
b34976b6 | 1689 | bfd_boolean relocs; |
c434dee6 | 1690 | bfd *ibfd; |
70256ad8 | 1691 | |
c434dee6 AJ |
1692 | htab = elf64_x86_64_hash_table (info); |
1693 | dynobj = htab->elf.dynobj; | |
1694 | if (dynobj == NULL) | |
1695 | abort (); | |
70256ad8 | 1696 | |
c434dee6 | 1697 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1698 | { |
1699 | /* Set the contents of the .interp section to the interpreter. */ | |
36af4a4e | 1700 | if (info->executable) |
70256ad8 AJ |
1701 | { |
1702 | s = bfd_get_section_by_name (dynobj, ".interp"); | |
c434dee6 AJ |
1703 | if (s == NULL) |
1704 | abort (); | |
eea6121a | 1705 | s->size = sizeof ELF_DYNAMIC_INTERPRETER; |
70256ad8 AJ |
1706 | s->contents = (unsigned char *) ELF_DYNAMIC_INTERPRETER; |
1707 | } | |
1708 | } | |
70256ad8 | 1709 | |
c434dee6 AJ |
1710 | /* Set up .got offsets for local syms, and space for local dynamic |
1711 | relocs. */ | |
1712 | for (ibfd = info->input_bfds; ibfd != NULL; ibfd = ibfd->link_next) | |
70256ad8 | 1713 | { |
c434dee6 AJ |
1714 | bfd_signed_vma *local_got; |
1715 | bfd_signed_vma *end_local_got; | |
bffbf940 | 1716 | char *local_tls_type; |
67a4f2b7 | 1717 | bfd_vma *local_tlsdesc_gotent; |
c434dee6 AJ |
1718 | bfd_size_type locsymcount; |
1719 | Elf_Internal_Shdr *symtab_hdr; | |
1720 | asection *srel; | |
70256ad8 | 1721 | |
c434dee6 | 1722 | if (bfd_get_flavour (ibfd) != bfd_target_elf_flavour) |
70256ad8 AJ |
1723 | continue; |
1724 | ||
c434dee6 | 1725 | for (s = ibfd->sections; s != NULL; s = s->next) |
70256ad8 | 1726 | { |
c434dee6 AJ |
1727 | struct elf64_x86_64_dyn_relocs *p; |
1728 | ||
e81d3500 DD |
1729 | for (p = (struct elf64_x86_64_dyn_relocs *) |
1730 | (elf_section_data (s)->local_dynrel); | |
c434dee6 AJ |
1731 | p != NULL; |
1732 | p = p->next) | |
70256ad8 | 1733 | { |
c434dee6 AJ |
1734 | if (!bfd_is_abs_section (p->sec) |
1735 | && bfd_is_abs_section (p->sec->output_section)) | |
1736 | { | |
1737 | /* Input section has been discarded, either because | |
1738 | it is a copy of a linkonce section or due to | |
1739 | linker script /DISCARD/, so we'll be discarding | |
1740 | the relocs too. */ | |
1741 | } | |
1742 | else if (p->count != 0) | |
1743 | { | |
1744 | srel = elf_section_data (p->sec)->sreloc; | |
eea6121a | 1745 | srel->size += p->count * sizeof (Elf64_External_Rela); |
c434dee6 AJ |
1746 | if ((p->sec->output_section->flags & SEC_READONLY) != 0) |
1747 | info->flags |= DF_TEXTREL; | |
1748 | ||
1749 | } | |
70256ad8 AJ |
1750 | } |
1751 | } | |
c434dee6 AJ |
1752 | |
1753 | local_got = elf_local_got_refcounts (ibfd); | |
1754 | if (!local_got) | |
1755 | continue; | |
1756 | ||
1757 | symtab_hdr = &elf_tdata (ibfd)->symtab_hdr; | |
1758 | locsymcount = symtab_hdr->sh_info; | |
1759 | end_local_got = local_got + locsymcount; | |
bffbf940 | 1760 | local_tls_type = elf64_x86_64_local_got_tls_type (ibfd); |
67a4f2b7 | 1761 | local_tlsdesc_gotent = elf64_x86_64_local_tlsdesc_gotent (ibfd); |
c434dee6 AJ |
1762 | s = htab->sgot; |
1763 | srel = htab->srelgot; | |
67a4f2b7 AO |
1764 | for (; local_got < end_local_got; |
1765 | ++local_got, ++local_tls_type, ++local_tlsdesc_gotent) | |
70256ad8 | 1766 | { |
67a4f2b7 | 1767 | *local_tlsdesc_gotent = (bfd_vma) -1; |
c434dee6 | 1768 | if (*local_got > 0) |
70256ad8 | 1769 | { |
67a4f2b7 AO |
1770 | if (GOT_TLS_GDESC_P (*local_tls_type)) |
1771 | { | |
1772 | *local_tlsdesc_gotent = htab->sgotplt->size | |
1773 | - elf64_x86_64_compute_jump_table_size (htab); | |
1774 | htab->sgotplt->size += 2 * GOT_ENTRY_SIZE; | |
1775 | *local_got = (bfd_vma) -2; | |
1776 | } | |
1777 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
1778 | || GOT_TLS_GD_P (*local_tls_type)) | |
1779 | { | |
1780 | *local_got = s->size; | |
1781 | s->size += GOT_ENTRY_SIZE; | |
1782 | if (GOT_TLS_GD_P (*local_tls_type)) | |
1783 | s->size += GOT_ENTRY_SIZE; | |
1784 | } | |
bffbf940 | 1785 | if (info->shared |
67a4f2b7 | 1786 | || GOT_TLS_GD_ANY_P (*local_tls_type) |
bffbf940 | 1787 | || *local_tls_type == GOT_TLS_IE) |
67a4f2b7 AO |
1788 | { |
1789 | if (GOT_TLS_GDESC_P (*local_tls_type)) | |
1790 | { | |
1791 | htab->srelplt->size += sizeof (Elf64_External_Rela); | |
1792 | htab->tlsdesc_plt = (bfd_vma) -1; | |
1793 | } | |
1794 | if (! GOT_TLS_GDESC_P (*local_tls_type) | |
1795 | || GOT_TLS_GD_P (*local_tls_type)) | |
1796 | srel->size += sizeof (Elf64_External_Rela); | |
1797 | } | |
70256ad8 AJ |
1798 | } |
1799 | else | |
c434dee6 AJ |
1800 | *local_got = (bfd_vma) -1; |
1801 | } | |
1802 | } | |
70256ad8 | 1803 | |
bffbf940 JJ |
1804 | if (htab->tls_ld_got.refcount > 0) |
1805 | { | |
1806 | /* Allocate 2 got entries and 1 dynamic reloc for R_X86_64_TLSLD | |
1807 | relocs. */ | |
eea6121a AM |
1808 | htab->tls_ld_got.offset = htab->sgot->size; |
1809 | htab->sgot->size += 2 * GOT_ENTRY_SIZE; | |
1810 | htab->srelgot->size += sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
1811 | } |
1812 | else | |
1813 | htab->tls_ld_got.offset = -1; | |
1814 | ||
c434dee6 AJ |
1815 | /* Allocate global sym .plt and .got entries, and space for global |
1816 | sym dynamic relocs. */ | |
1817 | elf_link_hash_traverse (&htab->elf, allocate_dynrelocs, (PTR) info); | |
1818 | ||
67a4f2b7 AO |
1819 | /* For every jump slot reserved in the sgotplt, reloc_count is |
1820 | incremented. However, when we reserve space for TLS descriptors, | |
1821 | it's not incremented, so in order to compute the space reserved | |
1822 | for them, it suffices to multiply the reloc count by the jump | |
1823 | slot size. */ | |
1824 | if (htab->srelplt) | |
1825 | htab->sgotplt_jump_table_size | |
1826 | = elf64_x86_64_compute_jump_table_size (htab); | |
1827 | ||
1828 | if (htab->tlsdesc_plt) | |
1829 | { | |
1830 | /* If we're not using lazy TLS relocations, don't generate the | |
1831 | PLT and GOT entries they require. */ | |
1832 | if ((info->flags & DF_BIND_NOW)) | |
1833 | htab->tlsdesc_plt = 0; | |
1834 | else | |
1835 | { | |
1836 | htab->tlsdesc_got = htab->sgot->size; | |
1837 | htab->sgot->size += GOT_ENTRY_SIZE; | |
1838 | /* Reserve room for the initial entry. | |
1839 | FIXME: we could probably do away with it in this case. */ | |
1840 | if (htab->splt->size == 0) | |
1841 | htab->splt->size += PLT_ENTRY_SIZE; | |
1842 | htab->tlsdesc_plt = htab->splt->size; | |
1843 | htab->splt->size += PLT_ENTRY_SIZE; | |
1844 | } | |
1845 | } | |
1846 | ||
c434dee6 AJ |
1847 | /* We now have determined the sizes of the various dynamic sections. |
1848 | Allocate memory for them. */ | |
b34976b6 | 1849 | relocs = FALSE; |
c434dee6 AJ |
1850 | for (s = dynobj->sections; s != NULL; s = s->next) |
1851 | { | |
1852 | if ((s->flags & SEC_LINKER_CREATED) == 0) | |
1853 | continue; | |
1854 | ||
1855 | if (s == htab->splt | |
1856 | || s == htab->sgot | |
75ff4589 L |
1857 | || s == htab->sgotplt |
1858 | || s == htab->sdynbss) | |
c434dee6 AJ |
1859 | { |
1860 | /* Strip this section if we don't need it; see the | |
1861 | comment below. */ | |
1862 | } | |
0112cd26 | 1863 | else if (CONST_STRNEQ (bfd_get_section_name (dynobj, s), ".rela")) |
c434dee6 | 1864 | { |
eea6121a | 1865 | if (s->size != 0 && s != htab->srelplt) |
b34976b6 | 1866 | relocs = TRUE; |
c434dee6 AJ |
1867 | |
1868 | /* We use the reloc_count field as a counter if we need | |
1869 | to copy relocs into the output file. */ | |
67a4f2b7 AO |
1870 | if (s != htab->srelplt) |
1871 | s->reloc_count = 0; | |
70256ad8 | 1872 | } |
c434dee6 | 1873 | else |
70256ad8 AJ |
1874 | { |
1875 | /* It's not one of our sections, so don't allocate space. */ | |
1876 | continue; | |
1877 | } | |
1878 | ||
eea6121a | 1879 | if (s->size == 0) |
70256ad8 | 1880 | { |
c434dee6 AJ |
1881 | /* If we don't need this section, strip it from the |
1882 | output file. This is mostly to handle .rela.bss and | |
1883 | .rela.plt. We must create both sections in | |
1884 | create_dynamic_sections, because they must be created | |
1885 | before the linker maps input sections to output | |
1886 | sections. The linker does that before | |
1887 | adjust_dynamic_symbol is called, and it is that | |
1888 | function which decides whether anything needs to go | |
1889 | into these sections. */ | |
1890 | ||
8423293d | 1891 | s->flags |= SEC_EXCLUDE; |
70256ad8 AJ |
1892 | continue; |
1893 | } | |
1894 | ||
c456f082 AM |
1895 | if ((s->flags & SEC_HAS_CONTENTS) == 0) |
1896 | continue; | |
1897 | ||
70256ad8 AJ |
1898 | /* Allocate memory for the section contents. We use bfd_zalloc |
1899 | here in case unused entries are not reclaimed before the | |
1900 | section's contents are written out. This should not happen, | |
1901 | but this way if it does, we get a R_X86_64_NONE reloc instead | |
1902 | of garbage. */ | |
eea6121a | 1903 | s->contents = (bfd_byte *) bfd_zalloc (dynobj, s->size); |
c434dee6 | 1904 | if (s->contents == NULL) |
b34976b6 | 1905 | return FALSE; |
70256ad8 AJ |
1906 | } |
1907 | ||
c434dee6 | 1908 | if (htab->elf.dynamic_sections_created) |
70256ad8 AJ |
1909 | { |
1910 | /* Add some entries to the .dynamic section. We fill in the | |
1911 | values later, in elf64_x86_64_finish_dynamic_sections, but we | |
1912 | must add the entries now so that we get the correct size for | |
407443a3 | 1913 | the .dynamic section. The DT_DEBUG entry is filled in by the |
70256ad8 | 1914 | dynamic linker and used by the debugger. */ |
dc810e39 | 1915 | #define add_dynamic_entry(TAG, VAL) \ |
5a580b3a | 1916 | _bfd_elf_add_dynamic_entry (info, TAG, VAL) |
dc810e39 | 1917 | |
36af4a4e | 1918 | if (info->executable) |
70256ad8 | 1919 | { |
dc810e39 | 1920 | if (!add_dynamic_entry (DT_DEBUG, 0)) |
b34976b6 | 1921 | return FALSE; |
70256ad8 AJ |
1922 | } |
1923 | ||
eea6121a | 1924 | if (htab->splt->size != 0) |
70256ad8 | 1925 | { |
dc810e39 AM |
1926 | if (!add_dynamic_entry (DT_PLTGOT, 0) |
1927 | || !add_dynamic_entry (DT_PLTRELSZ, 0) | |
1928 | || !add_dynamic_entry (DT_PLTREL, DT_RELA) | |
1929 | || !add_dynamic_entry (DT_JMPREL, 0)) | |
b34976b6 | 1930 | return FALSE; |
67a4f2b7 AO |
1931 | |
1932 | if (htab->tlsdesc_plt | |
1933 | && (!add_dynamic_entry (DT_TLSDESC_PLT, 0) | |
1934 | || !add_dynamic_entry (DT_TLSDESC_GOT, 0))) | |
1935 | return FALSE; | |
70256ad8 AJ |
1936 | } |
1937 | ||
1938 | if (relocs) | |
1939 | { | |
dc810e39 AM |
1940 | if (!add_dynamic_entry (DT_RELA, 0) |
1941 | || !add_dynamic_entry (DT_RELASZ, 0) | |
1942 | || !add_dynamic_entry (DT_RELAENT, sizeof (Elf64_External_Rela))) | |
b34976b6 | 1943 | return FALSE; |
70256ad8 | 1944 | |
c434dee6 AJ |
1945 | /* If any dynamic relocs apply to a read-only section, |
1946 | then we need a DT_TEXTREL entry. */ | |
1947 | if ((info->flags & DF_TEXTREL) == 0) | |
1948 | elf_link_hash_traverse (&htab->elf, readonly_dynrelocs, | |
1949 | (PTR) info); | |
1950 | ||
1951 | if ((info->flags & DF_TEXTREL) != 0) | |
1952 | { | |
1953 | if (!add_dynamic_entry (DT_TEXTREL, 0)) | |
b34976b6 | 1954 | return FALSE; |
c434dee6 | 1955 | } |
70256ad8 AJ |
1956 | } |
1957 | } | |
dc810e39 | 1958 | #undef add_dynamic_entry |
70256ad8 | 1959 | |
b34976b6 | 1960 | return TRUE; |
70256ad8 AJ |
1961 | } |
1962 | ||
67a4f2b7 AO |
1963 | static bfd_boolean |
1964 | elf64_x86_64_always_size_sections (bfd *output_bfd, | |
1965 | struct bfd_link_info *info) | |
1966 | { | |
1967 | asection *tls_sec = elf_hash_table (info)->tls_sec; | |
1968 | ||
1969 | if (tls_sec) | |
1970 | { | |
1971 | struct elf_link_hash_entry *tlsbase; | |
1972 | ||
1973 | tlsbase = elf_link_hash_lookup (elf_hash_table (info), | |
1974 | "_TLS_MODULE_BASE_", | |
1975 | FALSE, FALSE, FALSE); | |
1976 | ||
1977 | if (tlsbase && tlsbase->type == STT_TLS) | |
1978 | { | |
1979 | struct bfd_link_hash_entry *bh = NULL; | |
1980 | const struct elf_backend_data *bed | |
1981 | = get_elf_backend_data (output_bfd); | |
1982 | ||
1983 | if (!(_bfd_generic_link_add_one_symbol | |
1984 | (info, output_bfd, "_TLS_MODULE_BASE_", BSF_LOCAL, | |
1985 | tls_sec, 0, NULL, FALSE, | |
1986 | bed->collect, &bh))) | |
1987 | return FALSE; | |
1988 | tlsbase = (struct elf_link_hash_entry *)bh; | |
1989 | tlsbase->def_regular = 1; | |
1990 | tlsbase->other = STV_HIDDEN; | |
1991 | (*bed->elf_backend_hide_symbol) (info, tlsbase, TRUE); | |
1992 | } | |
1993 | } | |
1994 | ||
1995 | return TRUE; | |
1996 | } | |
1997 | ||
bffbf940 JJ |
1998 | /* Return the base VMA address which should be subtracted from real addresses |
1999 | when resolving @dtpoff relocation. | |
2000 | This is PT_TLS segment p_vaddr. */ | |
2001 | ||
2002 | static bfd_vma | |
27482721 | 2003 | dtpoff_base (struct bfd_link_info *info) |
bffbf940 | 2004 | { |
e1918d23 AM |
2005 | /* If tls_sec is NULL, we should have signalled an error already. */ |
2006 | if (elf_hash_table (info)->tls_sec == NULL) | |
bffbf940 | 2007 | return 0; |
e1918d23 | 2008 | return elf_hash_table (info)->tls_sec->vma; |
bffbf940 JJ |
2009 | } |
2010 | ||
2011 | /* Return the relocation value for @tpoff relocation | |
2012 | if STT_TLS virtual address is ADDRESS. */ | |
2013 | ||
2014 | static bfd_vma | |
27482721 | 2015 | tpoff (struct bfd_link_info *info, bfd_vma address) |
bffbf940 | 2016 | { |
e1918d23 | 2017 | struct elf_link_hash_table *htab = elf_hash_table (info); |
bffbf940 JJ |
2018 | |
2019 | /* If tls_segment is NULL, we should have signalled an error already. */ | |
e1918d23 | 2020 | if (htab->tls_sec == NULL) |
bffbf940 | 2021 | return 0; |
e1918d23 | 2022 | return address - htab->tls_size - htab->tls_sec->vma; |
bffbf940 JJ |
2023 | } |
2024 | ||
90f487df L |
2025 | /* Is the instruction before OFFSET in CONTENTS a 32bit relative |
2026 | branch? */ | |
2027 | ||
2028 | static bfd_boolean | |
2029 | is_32bit_relative_branch (bfd_byte *contents, bfd_vma offset) | |
2030 | { | |
2031 | /* Opcode Instruction | |
2032 | 0xe8 call | |
2033 | 0xe9 jump | |
2034 | 0x0f 0x8x conditional jump */ | |
2035 | return ((offset > 0 | |
2036 | && (contents [offset - 1] == 0xe8 | |
2037 | || contents [offset - 1] == 0xe9)) | |
2038 | || (offset > 1 | |
2039 | && contents [offset - 2] == 0x0f | |
2040 | && (contents [offset - 1] & 0xf0) == 0x80)); | |
2041 | } | |
2042 | ||
8d88c4ca NC |
2043 | /* Relocate an x86_64 ELF section. */ |
2044 | ||
b34976b6 | 2045 | static bfd_boolean |
27482721 AJ |
2046 | elf64_x86_64_relocate_section (bfd *output_bfd, struct bfd_link_info *info, |
2047 | bfd *input_bfd, asection *input_section, | |
2048 | bfd_byte *contents, Elf_Internal_Rela *relocs, | |
2049 | Elf_Internal_Sym *local_syms, | |
2050 | asection **local_sections) | |
8d88c4ca | 2051 | { |
c434dee6 | 2052 | struct elf64_x86_64_link_hash_table *htab; |
8d88c4ca NC |
2053 | Elf_Internal_Shdr *symtab_hdr; |
2054 | struct elf_link_hash_entry **sym_hashes; | |
2055 | bfd_vma *local_got_offsets; | |
67a4f2b7 | 2056 | bfd_vma *local_tlsdesc_gotents; |
c434dee6 | 2057 | Elf_Internal_Rela *rel; |
8d88c4ca NC |
2058 | Elf_Internal_Rela *relend; |
2059 | ||
c434dee6 | 2060 | htab = elf64_x86_64_hash_table (info); |
8d88c4ca NC |
2061 | symtab_hdr = &elf_tdata (input_bfd)->symtab_hdr; |
2062 | sym_hashes = elf_sym_hashes (input_bfd); | |
2063 | local_got_offsets = elf_local_got_offsets (input_bfd); | |
67a4f2b7 | 2064 | local_tlsdesc_gotents = elf64_x86_64_local_tlsdesc_gotent (input_bfd); |
8d88c4ca | 2065 | |
c434dee6 | 2066 | rel = relocs; |
8d88c4ca | 2067 | relend = relocs + input_section->reloc_count; |
c434dee6 | 2068 | for (; rel < relend; rel++) |
8d88c4ca | 2069 | { |
bffbf940 | 2070 | unsigned int r_type; |
8d88c4ca NC |
2071 | reloc_howto_type *howto; |
2072 | unsigned long r_symndx; | |
2073 | struct elf_link_hash_entry *h; | |
2074 | Elf_Internal_Sym *sym; | |
2075 | asection *sec; | |
67a4f2b7 | 2076 | bfd_vma off, offplt; |
8d88c4ca | 2077 | bfd_vma relocation; |
b34976b6 | 2078 | bfd_boolean unresolved_reloc; |
8d88c4ca | 2079 | bfd_reloc_status_type r; |
bffbf940 | 2080 | int tls_type; |
8d88c4ca | 2081 | |
c434dee6 | 2082 | r_type = ELF64_R_TYPE (rel->r_info); |
fe4770f4 AJ |
2083 | if (r_type == (int) R_X86_64_GNU_VTINHERIT |
2084 | || r_type == (int) R_X86_64_GNU_VTENTRY) | |
2085 | continue; | |
8d88c4ca | 2086 | |
bffbf940 | 2087 | if (r_type >= R_X86_64_max) |
8da6118f KH |
2088 | { |
2089 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2090 | return FALSE; |
8da6118f | 2091 | } |
8d88c4ca | 2092 | |
b491616a | 2093 | howto = x86_64_elf_howto_table + r_type; |
c434dee6 | 2094 | r_symndx = ELF64_R_SYM (rel->r_info); |
8d88c4ca NC |
2095 | h = NULL; |
2096 | sym = NULL; | |
2097 | sec = NULL; | |
b34976b6 | 2098 | unresolved_reloc = FALSE; |
8d88c4ca | 2099 | if (r_symndx < symtab_hdr->sh_info) |
8da6118f KH |
2100 | { |
2101 | sym = local_syms + r_symndx; | |
2102 | sec = local_sections[r_symndx]; | |
c434dee6 | 2103 | |
8517fae7 | 2104 | relocation = _bfd_elf_rela_local_sym (output_bfd, sym, &sec, rel); |
8da6118f | 2105 | } |
8d88c4ca | 2106 | else |
8da6118f | 2107 | { |
560e09e9 | 2108 | bfd_boolean warned; |
c434dee6 | 2109 | |
b2a8e766 AM |
2110 | RELOC_FOR_GLOBAL_SYMBOL (info, input_bfd, input_section, rel, |
2111 | r_symndx, symtab_hdr, sym_hashes, | |
2112 | h, sec, relocation, | |
2113 | unresolved_reloc, warned); | |
8da6118f | 2114 | } |
ab96bf03 AM |
2115 | |
2116 | if (sec != NULL && elf_discarded_section (sec)) | |
2117 | { | |
2118 | /* For relocs against symbols from removed linkonce sections, | |
2119 | or sections discarded by a linker script, we just want the | |
2120 | section contents zeroed. Avoid any special processing. */ | |
2121 | _bfd_clear_contents (howto, input_bfd, contents + rel->r_offset); | |
2122 | rel->r_info = 0; | |
2123 | rel->r_addend = 0; | |
2124 | continue; | |
2125 | } | |
2126 | ||
2127 | if (info->relocatable) | |
2128 | continue; | |
2129 | ||
70256ad8 AJ |
2130 | /* When generating a shared object, the relocations handled here are |
2131 | copied into the output file to be resolved at run time. */ | |
2132 | switch (r_type) | |
2133 | { | |
7b81dfbb | 2134 | asection *base_got; |
70256ad8 | 2135 | case R_X86_64_GOT32: |
7b81dfbb | 2136 | case R_X86_64_GOT64: |
70256ad8 AJ |
2137 | /* Relocation is to the entry for this symbol in the global |
2138 | offset table. */ | |
70256ad8 | 2139 | case R_X86_64_GOTPCREL: |
7b81dfbb AJ |
2140 | case R_X86_64_GOTPCREL64: |
2141 | /* Use global offset table entry as symbol value. */ | |
2142 | case R_X86_64_GOTPLT64: | |
2143 | /* This is the same as GOT64 for relocation purposes, but | |
2144 | indicates the existence of a PLT entry. The difficulty is, | |
2145 | that we must calculate the GOT slot offset from the PLT | |
2146 | offset, if this symbol got a PLT entry (it was global). | |
2147 | Additionally if it's computed from the PLT entry, then that | |
2148 | GOT offset is relative to .got.plt, not to .got. */ | |
2149 | base_got = htab->sgot; | |
2150 | ||
c434dee6 AJ |
2151 | if (htab->sgot == NULL) |
2152 | abort (); | |
053579d7 | 2153 | |
51e0a107 | 2154 | if (h != NULL) |
70256ad8 | 2155 | { |
b34976b6 | 2156 | bfd_boolean dyn; |
c434dee6 AJ |
2157 | |
2158 | off = h->got.offset; | |
7b81dfbb AJ |
2159 | if (h->needs_plt |
2160 | && h->plt.offset != (bfd_vma)-1 | |
2161 | && off == (bfd_vma)-1) | |
2162 | { | |
2163 | /* We can't use h->got.offset here to save | |
2164 | state, or even just remember the offset, as | |
2165 | finish_dynamic_symbol would use that as offset into | |
2166 | .got. */ | |
2167 | bfd_vma plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
2168 | off = (plt_index + 3) * GOT_ENTRY_SIZE; | |
2169 | base_got = htab->sgotplt; | |
2170 | } | |
2171 | ||
c434dee6 | 2172 | dyn = htab->elf.dynamic_sections_created; |
51e0a107 | 2173 | |
27482721 | 2174 | if (! WILL_CALL_FINISH_DYNAMIC_SYMBOL (dyn, info->shared, h) |
51e0a107 | 2175 | || (info->shared |
27482721 | 2176 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
4bc6e03a AJ |
2177 | || (ELF_ST_VISIBILITY (h->other) |
2178 | && h->root.type == bfd_link_hash_undefweak)) | |
51e0a107 JH |
2179 | { |
2180 | /* This is actually a static link, or it is a -Bsymbolic | |
2181 | link and the symbol is defined locally, or the symbol | |
407443a3 | 2182 | was forced to be local because of a version file. We |
51e0a107 JH |
2183 | must initialize this entry in the global offset table. |
2184 | Since the offset must always be a multiple of 8, we | |
2185 | use the least significant bit to record whether we | |
2186 | have initialized it already. | |
2187 | ||
2188 | When doing a dynamic link, we create a .rela.got | |
407443a3 AJ |
2189 | relocation entry to initialize the value. This is |
2190 | done in the finish_dynamic_symbol routine. */ | |
51e0a107 JH |
2191 | if ((off & 1) != 0) |
2192 | off &= ~1; | |
2193 | else | |
2194 | { | |
2195 | bfd_put_64 (output_bfd, relocation, | |
7b81dfbb AJ |
2196 | base_got->contents + off); |
2197 | /* Note that this is harmless for the GOTPLT64 case, | |
2198 | as -1 | 1 still is -1. */ | |
51e0a107 JH |
2199 | h->got.offset |= 1; |
2200 | } | |
2201 | } | |
053579d7 | 2202 | else |
b34976b6 | 2203 | unresolved_reloc = FALSE; |
70256ad8 | 2204 | } |
51e0a107 JH |
2205 | else |
2206 | { | |
c434dee6 AJ |
2207 | if (local_got_offsets == NULL) |
2208 | abort (); | |
51e0a107 JH |
2209 | |
2210 | off = local_got_offsets[r_symndx]; | |
2211 | ||
2212 | /* The offset must always be a multiple of 8. We use | |
407443a3 AJ |
2213 | the least significant bit to record whether we have |
2214 | already generated the necessary reloc. */ | |
51e0a107 JH |
2215 | if ((off & 1) != 0) |
2216 | off &= ~1; | |
2217 | else | |
2218 | { | |
c434dee6 | 2219 | bfd_put_64 (output_bfd, relocation, |
7b81dfbb | 2220 | base_got->contents + off); |
51e0a107 JH |
2221 | |
2222 | if (info->shared) | |
2223 | { | |
947216bf | 2224 | asection *s; |
51e0a107 | 2225 | Elf_Internal_Rela outrel; |
947216bf | 2226 | bfd_byte *loc; |
70256ad8 | 2227 | |
51e0a107 JH |
2228 | /* We need to generate a R_X86_64_RELATIVE reloc |
2229 | for the dynamic linker. */ | |
947216bf AM |
2230 | s = htab->srelgot; |
2231 | if (s == NULL) | |
c434dee6 | 2232 | abort (); |
51e0a107 | 2233 | |
7b81dfbb AJ |
2234 | outrel.r_offset = (base_got->output_section->vma |
2235 | + base_got->output_offset | |
51e0a107 JH |
2236 | + off); |
2237 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); | |
2238 | outrel.r_addend = relocation; | |
947216bf AM |
2239 | loc = s->contents; |
2240 | loc += s->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2241 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
51e0a107 JH |
2242 | } |
2243 | ||
2244 | local_got_offsets[r_symndx] |= 1; | |
2245 | } | |
51e0a107 | 2246 | } |
6a2bda3f | 2247 | |
c434dee6 AJ |
2248 | if (off >= (bfd_vma) -2) |
2249 | abort (); | |
2250 | ||
7b81dfbb AJ |
2251 | relocation = base_got->output_section->vma |
2252 | + base_got->output_offset + off; | |
2253 | if (r_type != R_X86_64_GOTPCREL && r_type != R_X86_64_GOTPCREL64) | |
8c37241b JJ |
2254 | relocation -= htab->sgotplt->output_section->vma |
2255 | - htab->sgotplt->output_offset; | |
c434dee6 | 2256 | |
70256ad8 AJ |
2257 | break; |
2258 | ||
d6ab8113 JB |
2259 | case R_X86_64_GOTOFF64: |
2260 | /* Relocation is relative to the start of the global offset | |
2261 | table. */ | |
2262 | ||
2263 | /* Check to make sure it isn't a protected function symbol | |
2264 | for shared library since it may not be local when used | |
2265 | as function address. */ | |
2266 | if (info->shared | |
2267 | && h | |
2268 | && h->def_regular | |
2269 | && h->type == STT_FUNC | |
2270 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2271 | { | |
2272 | (*_bfd_error_handler) | |
2273 | (_("%B: relocation R_X86_64_GOTOFF64 against protected function `%s' can not be used when making a shared object"), | |
2274 | input_bfd, h->root.root.string); | |
2275 | bfd_set_error (bfd_error_bad_value); | |
2276 | return FALSE; | |
2277 | } | |
2278 | ||
2279 | /* Note that sgot is not involved in this | |
2280 | calculation. We always want the start of .got.plt. If we | |
2281 | defined _GLOBAL_OFFSET_TABLE_ in a different way, as is | |
2282 | permitted by the ABI, we might have to change this | |
2283 | calculation. */ | |
2284 | relocation -= htab->sgotplt->output_section->vma | |
2285 | + htab->sgotplt->output_offset; | |
2286 | break; | |
2287 | ||
2288 | case R_X86_64_GOTPC32: | |
7b81dfbb | 2289 | case R_X86_64_GOTPC64: |
d6ab8113 JB |
2290 | /* Use global offset table as symbol value. */ |
2291 | relocation = htab->sgotplt->output_section->vma | |
2292 | + htab->sgotplt->output_offset; | |
2293 | unresolved_reloc = FALSE; | |
2294 | break; | |
7b81dfbb AJ |
2295 | |
2296 | case R_X86_64_PLTOFF64: | |
2297 | /* Relocation is PLT entry relative to GOT. For local | |
2298 | symbols it's the symbol itself relative to GOT. */ | |
2299 | if (h != NULL | |
2300 | /* See PLT32 handling. */ | |
2301 | && h->plt.offset != (bfd_vma) -1 | |
2302 | && htab->splt != NULL) | |
2303 | { | |
2304 | relocation = (htab->splt->output_section->vma | |
2305 | + htab->splt->output_offset | |
2306 | + h->plt.offset); | |
2307 | unresolved_reloc = FALSE; | |
2308 | } | |
2309 | ||
2310 | relocation -= htab->sgotplt->output_section->vma | |
2311 | + htab->sgotplt->output_offset; | |
2312 | break; | |
d6ab8113 | 2313 | |
70256ad8 AJ |
2314 | case R_X86_64_PLT32: |
2315 | /* Relocation is to the entry for this symbol in the | |
2316 | procedure linkage table. */ | |
2317 | ||
2318 | /* Resolve a PLT32 reloc against a local symbol directly, | |
407443a3 | 2319 | without using the procedure linkage table. */ |
70256ad8 AJ |
2320 | if (h == NULL) |
2321 | break; | |
2322 | ||
c434dee6 AJ |
2323 | if (h->plt.offset == (bfd_vma) -1 |
2324 | || htab->splt == NULL) | |
70256ad8 AJ |
2325 | { |
2326 | /* We didn't make a PLT entry for this symbol. This | |
407443a3 AJ |
2327 | happens when statically linking PIC code, or when |
2328 | using -Bsymbolic. */ | |
70256ad8 AJ |
2329 | break; |
2330 | } | |
2331 | ||
c434dee6 AJ |
2332 | relocation = (htab->splt->output_section->vma |
2333 | + htab->splt->output_offset | |
70256ad8 | 2334 | + h->plt.offset); |
b34976b6 | 2335 | unresolved_reloc = FALSE; |
70256ad8 AJ |
2336 | break; |
2337 | ||
fd8ab9e5 AJ |
2338 | case R_X86_64_PC8: |
2339 | case R_X86_64_PC16: | |
2340 | case R_X86_64_PC32: | |
6610a52d L |
2341 | if (info->shared |
2342 | && !SYMBOL_REFERENCES_LOCAL (info, h) | |
ba3bee0b | 2343 | && (input_section->flags & SEC_ALLOC) != 0 |
90f487df L |
2344 | && (input_section->flags & SEC_READONLY) != 0 |
2345 | && (!h->def_regular | |
2346 | || r_type != R_X86_64_PC32 | |
2347 | || h->type != STT_FUNC | |
2348 | || ELF_ST_VISIBILITY (h->other) != STV_PROTECTED | |
2349 | || !is_32bit_relative_branch (contents, | |
2350 | rel->r_offset))) | |
6610a52d | 2351 | { |
90f487df L |
2352 | if (h->def_regular |
2353 | && r_type == R_X86_64_PC32 | |
2354 | && h->type == STT_FUNC | |
2355 | && ELF_ST_VISIBILITY (h->other) == STV_PROTECTED) | |
2356 | (*_bfd_error_handler) | |
2357 | (_("%B: relocation R_X86_64_PC32 against protected function `%s' can not be used when making a shared object"), | |
2358 | input_bfd, h->root.root.string); | |
2359 | else | |
2360 | (*_bfd_error_handler) | |
2361 | (_("%B: relocation %s against `%s' can not be used when making a shared object; recompile with -fPIC"), | |
2362 | input_bfd, x86_64_elf_howto_table[r_type].name, | |
2363 | h->root.root.string); | |
6610a52d L |
2364 | bfd_set_error (bfd_error_bad_value); |
2365 | return FALSE; | |
2366 | } | |
2367 | /* Fall through. */ | |
2368 | ||
70256ad8 AJ |
2369 | case R_X86_64_8: |
2370 | case R_X86_64_16: | |
2371 | case R_X86_64_32: | |
d6ab8113 | 2372 | case R_X86_64_PC64: |
6b3db546 | 2373 | case R_X86_64_64: |
80643fbc | 2374 | /* FIXME: The ABI says the linker should make sure the value is |
407443a3 | 2375 | the same when it's zeroextended to 64 bit. */ |
c434dee6 | 2376 | |
b1e24c02 | 2377 | if ((input_section->flags & SEC_ALLOC) == 0) |
c434dee6 AJ |
2378 | break; |
2379 | ||
2380 | if ((info->shared | |
4bc6e03a AJ |
2381 | && (h == NULL |
2382 | || ELF_ST_VISIBILITY (h->other) == STV_DEFAULT | |
2383 | || h->root.type != bfd_link_hash_undefweak) | |
c434dee6 AJ |
2384 | && ((r_type != R_X86_64_PC8 |
2385 | && r_type != R_X86_64_PC16 | |
d6ab8113 JB |
2386 | && r_type != R_X86_64_PC32 |
2387 | && r_type != R_X86_64_PC64) | |
f6c52c13 | 2388 | || !SYMBOL_CALLS_LOCAL (info, h))) |
d40d037c AJ |
2389 | || (ELIMINATE_COPY_RELOCS |
2390 | && !info->shared | |
c434dee6 AJ |
2391 | && h != NULL |
2392 | && h->dynindx != -1 | |
f5385ebf AM |
2393 | && !h->non_got_ref |
2394 | && ((h->def_dynamic | |
2395 | && !h->def_regular) | |
c434dee6 AJ |
2396 | || h->root.type == bfd_link_hash_undefweak |
2397 | || h->root.type == bfd_link_hash_undefined))) | |
70256ad8 AJ |
2398 | { |
2399 | Elf_Internal_Rela outrel; | |
947216bf | 2400 | bfd_byte *loc; |
b34976b6 | 2401 | bfd_boolean skip, relocate; |
c434dee6 | 2402 | asection *sreloc; |
70256ad8 AJ |
2403 | |
2404 | /* When generating a shared object, these relocations | |
2405 | are copied into the output file to be resolved at run | |
407443a3 | 2406 | time. */ |
b34976b6 AM |
2407 | skip = FALSE; |
2408 | relocate = FALSE; | |
70256ad8 | 2409 | |
c629eae0 JJ |
2410 | outrel.r_offset = |
2411 | _bfd_elf_section_offset (output_bfd, info, input_section, | |
c434dee6 | 2412 | rel->r_offset); |
c629eae0 | 2413 | if (outrel.r_offset == (bfd_vma) -1) |
b34976b6 | 2414 | skip = TRUE; |
0fb19cbc | 2415 | else if (outrel.r_offset == (bfd_vma) -2) |
b34976b6 | 2416 | skip = TRUE, relocate = TRUE; |
70256ad8 AJ |
2417 | |
2418 | outrel.r_offset += (input_section->output_section->vma | |
2419 | + input_section->output_offset); | |
2420 | ||
2421 | if (skip) | |
0bb2d96a | 2422 | memset (&outrel, 0, sizeof outrel); |
c434dee6 | 2423 | |
fd8ab9e5 AJ |
2424 | /* h->dynindx may be -1 if this symbol was marked to |
2425 | become local. */ | |
2426 | else if (h != NULL | |
c434dee6 AJ |
2427 | && h->dynindx != -1 |
2428 | && (r_type == R_X86_64_PC8 | |
2429 | || r_type == R_X86_64_PC16 | |
2430 | || r_type == R_X86_64_PC32 | |
d6ab8113 | 2431 | || r_type == R_X86_64_PC64 |
c434dee6 | 2432 | || !info->shared |
55255dae | 2433 | || !SYMBOLIC_BIND (info, h) |
f5385ebf | 2434 | || !h->def_regular)) |
70256ad8 | 2435 | { |
70256ad8 | 2436 | outrel.r_info = ELF64_R_INFO (h->dynindx, r_type); |
c434dee6 | 2437 | outrel.r_addend = rel->r_addend; |
70256ad8 AJ |
2438 | } |
2439 | else | |
2440 | { | |
c434dee6 | 2441 | /* This symbol is local, or marked to become local. */ |
607c0e09 AS |
2442 | if (r_type == R_X86_64_64) |
2443 | { | |
b34976b6 | 2444 | relocate = TRUE; |
607c0e09 AS |
2445 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
2446 | outrel.r_addend = relocation + rel->r_addend; | |
2447 | } | |
2448 | else | |
2449 | { | |
2450 | long sindx; | |
2451 | ||
8517fae7 | 2452 | if (bfd_is_abs_section (sec)) |
607c0e09 AS |
2453 | sindx = 0; |
2454 | else if (sec == NULL || sec->owner == NULL) | |
2455 | { | |
2456 | bfd_set_error (bfd_error_bad_value); | |
b34976b6 | 2457 | return FALSE; |
607c0e09 AS |
2458 | } |
2459 | else | |
2460 | { | |
2461 | asection *osec; | |
2462 | ||
74541ad4 AM |
2463 | /* We are turning this relocation into one |
2464 | against a section symbol. It would be | |
2465 | proper to subtract the symbol's value, | |
2466 | osec->vma, from the emitted reloc addend, | |
2467 | but ld.so expects buggy relocs. */ | |
607c0e09 AS |
2468 | osec = sec->output_section; |
2469 | sindx = elf_section_data (osec)->dynindx; | |
74541ad4 AM |
2470 | if (sindx == 0) |
2471 | { | |
2472 | asection *oi = htab->elf.text_index_section; | |
2473 | sindx = elf_section_data (oi)->dynindx; | |
2474 | } | |
2475 | BFD_ASSERT (sindx != 0); | |
607c0e09 AS |
2476 | } |
2477 | ||
2478 | outrel.r_info = ELF64_R_INFO (sindx, r_type); | |
2479 | outrel.r_addend = relocation + rel->r_addend; | |
2480 | } | |
70256ad8 AJ |
2481 | } |
2482 | ||
c434dee6 AJ |
2483 | sreloc = elf_section_data (input_section)->sreloc; |
2484 | if (sreloc == NULL) | |
2485 | abort (); | |
2486 | ||
947216bf AM |
2487 | loc = sreloc->contents; |
2488 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 2489 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
70256ad8 AJ |
2490 | |
2491 | /* If this reloc is against an external symbol, we do | |
2492 | not want to fiddle with the addend. Otherwise, we | |
2493 | need to include the symbol value so that it becomes | |
2494 | an addend for the dynamic reloc. */ | |
2495 | if (! relocate) | |
2496 | continue; | |
2497 | } | |
2498 | ||
2499 | break; | |
2500 | ||
bffbf940 | 2501 | case R_X86_64_TLSGD: |
67a4f2b7 AO |
2502 | case R_X86_64_GOTPC32_TLSDESC: |
2503 | case R_X86_64_TLSDESC_CALL: | |
bffbf940 | 2504 | case R_X86_64_GOTTPOFF: |
2f3bf80a | 2505 | r_type = elf64_x86_64_tls_transition (info, r_type, h); |
bffbf940 JJ |
2506 | tls_type = GOT_UNKNOWN; |
2507 | if (h == NULL && local_got_offsets) | |
2508 | tls_type = elf64_x86_64_local_got_tls_type (input_bfd) [r_symndx]; | |
2509 | else if (h != NULL) | |
2510 | { | |
2511 | tls_type = elf64_x86_64_hash_entry (h)->tls_type; | |
2512 | if (!info->shared && h->dynindx == -1 && tls_type == GOT_TLS_IE) | |
2513 | r_type = R_X86_64_TPOFF32; | |
2514 | } | |
67a4f2b7 AO |
2515 | if (r_type == R_X86_64_TLSGD |
2516 | || r_type == R_X86_64_GOTPC32_TLSDESC | |
2517 | || r_type == R_X86_64_TLSDESC_CALL) | |
bffbf940 JJ |
2518 | { |
2519 | if (tls_type == GOT_TLS_IE) | |
2520 | r_type = R_X86_64_GOTTPOFF; | |
2521 | } | |
2522 | ||
2523 | if (r_type == R_X86_64_TPOFF32) | |
2524 | { | |
2525 | BFD_ASSERT (! unresolved_reloc); | |
2526 | if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) | |
2527 | { | |
2528 | unsigned int i; | |
abcf1d52 JJ |
2529 | static unsigned char tlsgd[8] |
2530 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
a3fadc9a L |
2531 | unsigned long tls_r_symndx; |
2532 | struct elf_link_hash_entry *tls_h; | |
bffbf940 JJ |
2533 | |
2534 | /* GD->LE transition. | |
abcf1d52 | 2535 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
a3fadc9a | 2536 | .word 0x6666; rex64; call __tls_get_addr |
bffbf940 JJ |
2537 | Change it into: |
2538 | movq %fs:0, %rax | |
2539 | leaq foo@tpoff(%rax), %rax */ | |
abcf1d52 JJ |
2540 | BFD_ASSERT (rel->r_offset >= 4); |
2541 | for (i = 0; i < 4; i++) | |
bffbf940 | 2542 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2543 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2544 | == tlsgd[i]); |
eea6121a | 2545 | BFD_ASSERT (rel->r_offset + 12 <= input_section->size); |
abcf1d52 JJ |
2546 | for (i = 0; i < 4; i++) |
2547 | BFD_ASSERT (bfd_get_8 (input_bfd, | |
2548 | contents + rel->r_offset + 4 + i) | |
2549 | == tlsgd[i+4]); | |
bffbf940 | 2550 | BFD_ASSERT (rel + 1 < relend); |
a3fadc9a L |
2551 | tls_r_symndx = ELF64_R_SYM (rel[1].r_info); |
2552 | BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info); | |
2553 | tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info]; | |
2554 | BFD_ASSERT (tls_h != NULL | |
2555 | && tls_h->root.root.string != NULL | |
2556 | && strcmp (tls_h->root.root.string, | |
2557 | "__tls_get_addr") == 0); | |
2558 | BFD_ASSERT ((! info->shared | |
2559 | && ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32) | |
2560 | || ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2561 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2562 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x8d\x80\0\0\0", |
2563 | 16); | |
2564 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
abcf1d52 | 2565 | contents + rel->r_offset + 8); |
a3fadc9a | 2566 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
2567 | rel++; |
2568 | continue; | |
2569 | } | |
67a4f2b7 AO |
2570 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
2571 | { | |
2572 | /* GDesc -> LE transition. | |
2573 | It's originally something like: | |
2574 | leaq x@tlsdesc(%rip), %rax | |
2575 | ||
2576 | Change it to: | |
2577 | movl $x@tpoff, %rax | |
2578 | ||
2579 | Registers other than %rax may be set up here. */ | |
2580 | ||
2581 | unsigned int val, type, type2; | |
2582 | bfd_vma roff; | |
2583 | ||
2584 | /* First, make sure it's a leaq adding rip to a | |
2585 | 32-bit offset into any register, although it's | |
2586 | probably almost always going to be rax. */ | |
2587 | roff = rel->r_offset; | |
2588 | BFD_ASSERT (roff >= 3); | |
2589 | type = bfd_get_8 (input_bfd, contents + roff - 3); | |
2590 | BFD_ASSERT ((type & 0xfb) == 0x48); | |
2591 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); | |
2592 | BFD_ASSERT (type2 == 0x8d); | |
2593 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
2594 | BFD_ASSERT ((val & 0xc7) == 0x05); | |
2595 | BFD_ASSERT (roff + 4 <= input_section->size); | |
2596 | ||
2597 | /* Now modify the instruction as appropriate. */ | |
2598 | bfd_put_8 (output_bfd, 0x48 | ((type >> 2) & 1), | |
2599 | contents + roff - 3); | |
2600 | bfd_put_8 (output_bfd, 0xc7, contents + roff - 2); | |
2601 | bfd_put_8 (output_bfd, 0xc0 | ((val >> 3) & 7), | |
2602 | contents + roff - 1); | |
2603 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2604 | contents + roff); | |
2605 | continue; | |
2606 | } | |
2607 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
2608 | { | |
2609 | /* GDesc -> LE transition. | |
2610 | It's originally: | |
2611 | call *(%rax) | |
2612 | Turn it into: | |
2613 | nop; nop. */ | |
2614 | ||
2615 | unsigned int val, type; | |
2616 | bfd_vma roff; | |
2617 | ||
2618 | /* First, make sure it's a call *(%rax). */ | |
2619 | roff = rel->r_offset; | |
2620 | BFD_ASSERT (roff + 2 <= input_section->size); | |
2621 | type = bfd_get_8 (input_bfd, contents + roff); | |
2622 | BFD_ASSERT (type == 0xff); | |
2623 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
2624 | BFD_ASSERT (val == 0x10); | |
2625 | ||
10efb593 L |
2626 | /* Now modify the instruction as appropriate. Use |
2627 | xchg %ax,%ax instead of 2 nops. */ | |
2628 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
2629 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2630 | continue; | |
2631 | } | |
bffbf940 JJ |
2632 | else |
2633 | { | |
2634 | unsigned int val, type, reg; | |
2635 | ||
2636 | /* IE->LE transition: | |
2637 | Originally it can be one of: | |
2638 | movq foo@gottpoff(%rip), %reg | |
2639 | addq foo@gottpoff(%rip), %reg | |
2640 | We change it into: | |
2641 | movq $foo, %reg | |
2642 | leaq foo(%reg), %reg | |
2643 | addq $foo, %reg. */ | |
2644 | BFD_ASSERT (rel->r_offset >= 3); | |
2645 | val = bfd_get_8 (input_bfd, contents + rel->r_offset - 3); | |
2646 | BFD_ASSERT (val == 0x48 || val == 0x4c); | |
2647 | type = bfd_get_8 (input_bfd, contents + rel->r_offset - 2); | |
2648 | BFD_ASSERT (type == 0x8b || type == 0x03); | |
2649 | reg = bfd_get_8 (input_bfd, contents + rel->r_offset - 1); | |
2650 | BFD_ASSERT ((reg & 0xc7) == 5); | |
2651 | reg >>= 3; | |
eea6121a | 2652 | BFD_ASSERT (rel->r_offset + 4 <= input_section->size); |
bffbf940 JJ |
2653 | if (type == 0x8b) |
2654 | { | |
2655 | /* movq */ | |
2656 | if (val == 0x4c) | |
2657 | bfd_put_8 (output_bfd, 0x49, | |
2658 | contents + rel->r_offset - 3); | |
2659 | bfd_put_8 (output_bfd, 0xc7, | |
2660 | contents + rel->r_offset - 2); | |
2661 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2662 | contents + rel->r_offset - 1); | |
2663 | } | |
2664 | else if (reg == 4) | |
2665 | { | |
2666 | /* addq -> addq - addressing with %rsp/%r12 is | |
2667 | special */ | |
2668 | if (val == 0x4c) | |
2669 | bfd_put_8 (output_bfd, 0x49, | |
2670 | contents + rel->r_offset - 3); | |
2671 | bfd_put_8 (output_bfd, 0x81, | |
2672 | contents + rel->r_offset - 2); | |
2673 | bfd_put_8 (output_bfd, 0xc0 | reg, | |
2674 | contents + rel->r_offset - 1); | |
2675 | } | |
2676 | else | |
2677 | { | |
2678 | /* addq -> leaq */ | |
2679 | if (val == 0x4c) | |
2680 | bfd_put_8 (output_bfd, 0x4d, | |
2681 | contents + rel->r_offset - 3); | |
2682 | bfd_put_8 (output_bfd, 0x8d, | |
2683 | contents + rel->r_offset - 2); | |
2684 | bfd_put_8 (output_bfd, 0x80 | reg | (reg << 3), | |
2685 | contents + rel->r_offset - 1); | |
2686 | } | |
2687 | bfd_put_32 (output_bfd, tpoff (info, relocation), | |
2688 | contents + rel->r_offset); | |
2689 | continue; | |
2690 | } | |
2691 | } | |
2692 | ||
2693 | if (htab->sgot == NULL) | |
2694 | abort (); | |
2695 | ||
2696 | if (h != NULL) | |
67a4f2b7 AO |
2697 | { |
2698 | off = h->got.offset; | |
2699 | offplt = elf64_x86_64_hash_entry (h)->tlsdesc_got; | |
2700 | } | |
bffbf940 JJ |
2701 | else |
2702 | { | |
2703 | if (local_got_offsets == NULL) | |
2704 | abort (); | |
2705 | ||
2706 | off = local_got_offsets[r_symndx]; | |
67a4f2b7 | 2707 | offplt = local_tlsdesc_gotents[r_symndx]; |
bffbf940 JJ |
2708 | } |
2709 | ||
2710 | if ((off & 1) != 0) | |
2711 | off &= ~1; | |
26e41594 | 2712 | else |
bffbf940 JJ |
2713 | { |
2714 | Elf_Internal_Rela outrel; | |
947216bf | 2715 | bfd_byte *loc; |
bffbf940 | 2716 | int dr_type, indx; |
67a4f2b7 | 2717 | asection *sreloc; |
bffbf940 JJ |
2718 | |
2719 | if (htab->srelgot == NULL) | |
2720 | abort (); | |
2721 | ||
67a4f2b7 AO |
2722 | indx = h && h->dynindx != -1 ? h->dynindx : 0; |
2723 | ||
2724 | if (GOT_TLS_GDESC_P (tls_type)) | |
2725 | { | |
2726 | outrel.r_info = ELF64_R_INFO (indx, R_X86_64_TLSDESC); | |
2727 | BFD_ASSERT (htab->sgotplt_jump_table_size + offplt | |
2728 | + 2 * GOT_ENTRY_SIZE <= htab->sgotplt->size); | |
2729 | outrel.r_offset = (htab->sgotplt->output_section->vma | |
2730 | + htab->sgotplt->output_offset | |
2731 | + offplt | |
2732 | + htab->sgotplt_jump_table_size); | |
2733 | sreloc = htab->srelplt; | |
2734 | loc = sreloc->contents; | |
2735 | loc += sreloc->reloc_count++ | |
2736 | * sizeof (Elf64_External_Rela); | |
2737 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
2738 | <= sreloc->contents + sreloc->size); | |
2739 | if (indx == 0) | |
2740 | outrel.r_addend = relocation - dtpoff_base (info); | |
2741 | else | |
2742 | outrel.r_addend = 0; | |
2743 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); | |
2744 | } | |
2745 | ||
2746 | sreloc = htab->srelgot; | |
2747 | ||
bffbf940 JJ |
2748 | outrel.r_offset = (htab->sgot->output_section->vma |
2749 | + htab->sgot->output_offset + off); | |
2750 | ||
67a4f2b7 | 2751 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 | 2752 | dr_type = R_X86_64_DTPMOD64; |
67a4f2b7 AO |
2753 | else if (GOT_TLS_GDESC_P (tls_type)) |
2754 | goto dr_done; | |
bffbf940 JJ |
2755 | else |
2756 | dr_type = R_X86_64_TPOFF64; | |
2757 | ||
2758 | bfd_put_64 (output_bfd, 0, htab->sgot->contents + off); | |
2759 | outrel.r_addend = 0; | |
67a4f2b7 AO |
2760 | if ((dr_type == R_X86_64_TPOFF64 |
2761 | || dr_type == R_X86_64_TLSDESC) && indx == 0) | |
bffbf940 JJ |
2762 | outrel.r_addend = relocation - dtpoff_base (info); |
2763 | outrel.r_info = ELF64_R_INFO (indx, dr_type); | |
2764 | ||
67a4f2b7 AO |
2765 | loc = sreloc->contents; |
2766 | loc += sreloc->reloc_count++ * sizeof (Elf64_External_Rela); | |
2767 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) | |
2768 | <= sreloc->contents + sreloc->size); | |
bffbf940 JJ |
2769 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2770 | ||
67a4f2b7 | 2771 | if (GOT_TLS_GD_P (tls_type)) |
bffbf940 JJ |
2772 | { |
2773 | if (indx == 0) | |
2774 | { | |
d40d037c | 2775 | BFD_ASSERT (! unresolved_reloc); |
bffbf940 JJ |
2776 | bfd_put_64 (output_bfd, |
2777 | relocation - dtpoff_base (info), | |
2778 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2779 | } | |
2780 | else | |
2781 | { | |
2782 | bfd_put_64 (output_bfd, 0, | |
2783 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2784 | outrel.r_info = ELF64_R_INFO (indx, | |
2785 | R_X86_64_DTPOFF64); | |
2786 | outrel.r_offset += GOT_ENTRY_SIZE; | |
67a4f2b7 | 2787 | sreloc->reloc_count++; |
947216bf | 2788 | loc += sizeof (Elf64_External_Rela); |
67a4f2b7 AO |
2789 | BFD_ASSERT (loc + sizeof (Elf64_External_Rela) |
2790 | <= sreloc->contents + sreloc->size); | |
947216bf | 2791 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
bffbf940 JJ |
2792 | } |
2793 | } | |
2794 | ||
67a4f2b7 | 2795 | dr_done: |
bffbf940 JJ |
2796 | if (h != NULL) |
2797 | h->got.offset |= 1; | |
2798 | else | |
2799 | local_got_offsets[r_symndx] |= 1; | |
2800 | } | |
2801 | ||
67a4f2b7 AO |
2802 | if (off >= (bfd_vma) -2 |
2803 | && ! GOT_TLS_GDESC_P (tls_type)) | |
bffbf940 JJ |
2804 | abort (); |
2805 | if (r_type == ELF64_R_TYPE (rel->r_info)) | |
2806 | { | |
67a4f2b7 AO |
2807 | if (r_type == R_X86_64_GOTPC32_TLSDESC |
2808 | || r_type == R_X86_64_TLSDESC_CALL) | |
2809 | relocation = htab->sgotplt->output_section->vma | |
2810 | + htab->sgotplt->output_offset | |
2811 | + offplt + htab->sgotplt_jump_table_size; | |
2812 | else | |
2813 | relocation = htab->sgot->output_section->vma | |
2814 | + htab->sgot->output_offset + off; | |
b34976b6 | 2815 | unresolved_reloc = FALSE; |
bffbf940 | 2816 | } |
67a4f2b7 | 2817 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSGD) |
bffbf940 JJ |
2818 | { |
2819 | unsigned int i; | |
abcf1d52 JJ |
2820 | static unsigned char tlsgd[8] |
2821 | = { 0x66, 0x48, 0x8d, 0x3d, 0x66, 0x66, 0x48, 0xe8 }; | |
bffbf940 JJ |
2822 | |
2823 | /* GD->IE transition. | |
abcf1d52 JJ |
2824 | .byte 0x66; leaq foo@tlsgd(%rip), %rdi |
2825 | .word 0x6666; rex64; call __tls_get_addr@plt | |
bffbf940 JJ |
2826 | Change it into: |
2827 | movq %fs:0, %rax | |
2828 | addq foo@gottpoff(%rip), %rax */ | |
abcf1d52 JJ |
2829 | BFD_ASSERT (rel->r_offset >= 4); |
2830 | for (i = 0; i < 4; i++) | |
26e41594 | 2831 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 | 2832 | contents + rel->r_offset - 4 + i) |
bffbf940 | 2833 | == tlsgd[i]); |
eea6121a | 2834 | BFD_ASSERT (rel->r_offset + 12 <= input_section->size); |
abcf1d52 | 2835 | for (i = 0; i < 4; i++) |
26e41594 | 2836 | BFD_ASSERT (bfd_get_8 (input_bfd, |
abcf1d52 JJ |
2837 | contents + rel->r_offset + 4 + i) |
2838 | == tlsgd[i+4]); | |
bffbf940 JJ |
2839 | BFD_ASSERT (rel + 1 < relend); |
2840 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
abcf1d52 | 2841 | memcpy (contents + rel->r_offset - 4, |
bffbf940 JJ |
2842 | "\x64\x48\x8b\x04\x25\0\0\0\0\x48\x03\x05\0\0\0", |
2843 | 16); | |
2844 | ||
2845 | relocation = (htab->sgot->output_section->vma | |
2846 | + htab->sgot->output_offset + off | |
2847 | - rel->r_offset | |
2848 | - input_section->output_section->vma | |
2849 | - input_section->output_offset | |
abcf1d52 | 2850 | - 12); |
bffbf940 | 2851 | bfd_put_32 (output_bfd, relocation, |
abcf1d52 | 2852 | contents + rel->r_offset + 8); |
bffbf940 JJ |
2853 | /* Skip R_X86_64_PLT32. */ |
2854 | rel++; | |
2855 | continue; | |
2856 | } | |
67a4f2b7 AO |
2857 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_GOTPC32_TLSDESC) |
2858 | { | |
2859 | /* GDesc -> IE transition. | |
2860 | It's originally something like: | |
2861 | leaq x@tlsdesc(%rip), %rax | |
2862 | ||
2863 | Change it to: | |
2864 | movq x@gottpoff(%rip), %rax # before nop; nop | |
2865 | ||
2866 | Registers other than %rax may be set up here. */ | |
2867 | ||
2868 | unsigned int val, type, type2; | |
2869 | bfd_vma roff; | |
2870 | ||
2871 | /* First, make sure it's a leaq adding rip to a 32-bit | |
2872 | offset into any register, although it's probably | |
2873 | almost always going to be rax. */ | |
2874 | roff = rel->r_offset; | |
2875 | BFD_ASSERT (roff >= 3); | |
2876 | type = bfd_get_8 (input_bfd, contents + roff - 3); | |
2877 | BFD_ASSERT ((type & 0xfb) == 0x48); | |
2878 | type2 = bfd_get_8 (input_bfd, contents + roff - 2); | |
2879 | BFD_ASSERT (type2 == 0x8d); | |
2880 | val = bfd_get_8 (input_bfd, contents + roff - 1); | |
2881 | BFD_ASSERT ((val & 0xc7) == 0x05); | |
2882 | BFD_ASSERT (roff + 4 <= input_section->size); | |
2883 | ||
2884 | /* Now modify the instruction as appropriate. */ | |
2885 | /* To turn a leaq into a movq in the form we use it, it | |
2886 | suffices to change the second byte from 0x8d to | |
2887 | 0x8b. */ | |
2888 | bfd_put_8 (output_bfd, 0x8b, contents + roff - 2); | |
2889 | ||
2890 | bfd_put_32 (output_bfd, | |
2891 | htab->sgot->output_section->vma | |
2892 | + htab->sgot->output_offset + off | |
2893 | - rel->r_offset | |
2894 | - input_section->output_section->vma | |
2895 | - input_section->output_offset | |
2896 | - 4, | |
2897 | contents + roff); | |
2898 | continue; | |
2899 | } | |
2900 | else if (ELF64_R_TYPE (rel->r_info) == R_X86_64_TLSDESC_CALL) | |
2901 | { | |
2902 | /* GDesc -> IE transition. | |
2903 | It's originally: | |
2904 | call *(%rax) | |
2905 | ||
2906 | Change it to: | |
2907 | nop; nop. */ | |
2908 | ||
2909 | unsigned int val, type; | |
2910 | bfd_vma roff; | |
2911 | ||
2912 | /* First, make sure it's a call *(%eax). */ | |
2913 | roff = rel->r_offset; | |
2914 | BFD_ASSERT (roff + 2 <= input_section->size); | |
2915 | type = bfd_get_8 (input_bfd, contents + roff); | |
2916 | BFD_ASSERT (type == 0xff); | |
2917 | val = bfd_get_8 (input_bfd, contents + roff + 1); | |
2918 | BFD_ASSERT (val == 0x10); | |
2919 | ||
10efb593 L |
2920 | /* Now modify the instruction as appropriate. Use |
2921 | xchg %ax,%ax instead of 2 nops. */ | |
2922 | bfd_put_8 (output_bfd, 0x66, contents + roff); | |
67a4f2b7 AO |
2923 | bfd_put_8 (output_bfd, 0x90, contents + roff + 1); |
2924 | ||
2925 | continue; | |
2926 | } | |
2927 | else | |
2928 | BFD_ASSERT (FALSE); | |
bffbf940 JJ |
2929 | break; |
2930 | ||
2931 | case R_X86_64_TLSLD: | |
2932 | if (! info->shared) | |
2933 | { | |
a3fadc9a L |
2934 | unsigned long tls_r_symndx; |
2935 | struct elf_link_hash_entry *tls_h; | |
2936 | ||
bffbf940 JJ |
2937 | /* LD->LE transition: |
2938 | Ensure it is: | |
a3fadc9a | 2939 | leaq foo@tlsld(%rip), %rdi; call __tls_get_addr. |
bffbf940 JJ |
2940 | We change it into: |
2941 | .word 0x6666; .byte 0x66; movl %fs:0, %rax. */ | |
2942 | BFD_ASSERT (rel->r_offset >= 3); | |
2943 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 3) | |
2944 | == 0x48); | |
2945 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 2) | |
2946 | == 0x8d); | |
2947 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset - 1) | |
2948 | == 0x3d); | |
eea6121a | 2949 | BFD_ASSERT (rel->r_offset + 9 <= input_section->size); |
bffbf940 JJ |
2950 | BFD_ASSERT (bfd_get_8 (input_bfd, contents + rel->r_offset + 4) |
2951 | == 0xe8); | |
2952 | BFD_ASSERT (rel + 1 < relend); | |
a3fadc9a L |
2953 | tls_r_symndx = ELF64_R_SYM (rel[1].r_info); |
2954 | BFD_ASSERT (tls_r_symndx >= symtab_hdr->sh_info); | |
2955 | tls_h = sym_hashes[tls_r_symndx - symtab_hdr->sh_info]; | |
2956 | BFD_ASSERT (tls_h != NULL | |
2957 | && tls_h->root.root.string != NULL | |
2958 | && strcmp (tls_h->root.root.string, | |
2959 | "__tls_get_addr") == 0); | |
2960 | BFD_ASSERT (ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PC32 | |
2961 | || ELF64_R_TYPE (rel[1].r_info) == R_X86_64_PLT32); | |
bffbf940 JJ |
2962 | memcpy (contents + rel->r_offset - 3, |
2963 | "\x66\x66\x66\x64\x48\x8b\x04\x25\0\0\0", 12); | |
a3fadc9a | 2964 | /* Skip R_X86_64_PC32/R_X86_64_PLT32. */ |
bffbf940 JJ |
2965 | rel++; |
2966 | continue; | |
2967 | } | |
2968 | ||
2969 | if (htab->sgot == NULL) | |
2970 | abort (); | |
2971 | ||
2972 | off = htab->tls_ld_got.offset; | |
2973 | if (off & 1) | |
2974 | off &= ~1; | |
2975 | else | |
2976 | { | |
2977 | Elf_Internal_Rela outrel; | |
947216bf | 2978 | bfd_byte *loc; |
bffbf940 JJ |
2979 | |
2980 | if (htab->srelgot == NULL) | |
2981 | abort (); | |
2982 | ||
2983 | outrel.r_offset = (htab->sgot->output_section->vma | |
2984 | + htab->sgot->output_offset + off); | |
2985 | ||
2986 | bfd_put_64 (output_bfd, 0, | |
2987 | htab->sgot->contents + off); | |
2988 | bfd_put_64 (output_bfd, 0, | |
2989 | htab->sgot->contents + off + GOT_ENTRY_SIZE); | |
2990 | outrel.r_info = ELF64_R_INFO (0, R_X86_64_DTPMOD64); | |
2991 | outrel.r_addend = 0; | |
947216bf AM |
2992 | loc = htab->srelgot->contents; |
2993 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
bffbf940 JJ |
2994 | bfd_elf64_swap_reloca_out (output_bfd, &outrel, loc); |
2995 | htab->tls_ld_got.offset |= 1; | |
2996 | } | |
2997 | relocation = htab->sgot->output_section->vma | |
2998 | + htab->sgot->output_offset + off; | |
b34976b6 | 2999 | unresolved_reloc = FALSE; |
bffbf940 JJ |
3000 | break; |
3001 | ||
3002 | case R_X86_64_DTPOFF32: | |
a45bb67d | 3003 | if (info->shared || (input_section->flags & SEC_CODE) == 0) |
bffbf940 JJ |
3004 | relocation -= dtpoff_base (info); |
3005 | else | |
3006 | relocation = tpoff (info, relocation); | |
3007 | break; | |
3008 | ||
3009 | case R_X86_64_TPOFF32: | |
3010 | BFD_ASSERT (! info->shared); | |
3011 | relocation = tpoff (info, relocation); | |
3012 | break; | |
3013 | ||
70256ad8 AJ |
3014 | default: |
3015 | break; | |
3016 | } | |
8d88c4ca | 3017 | |
239e1f3a AM |
3018 | /* Dynamic relocs are not propagated for SEC_DEBUGGING sections |
3019 | because such sections are not SEC_ALLOC and thus ld.so will | |
3020 | not process them. */ | |
c434dee6 | 3021 | if (unresolved_reloc |
239e1f3a | 3022 | && !((input_section->flags & SEC_DEBUGGING) != 0 |
f5385ebf | 3023 | && h->def_dynamic)) |
c434dee6 | 3024 | (*_bfd_error_handler) |
843fe662 | 3025 | (_("%B(%A+0x%lx): unresolvable %s relocation against symbol `%s'"), |
d003868e AM |
3026 | input_bfd, |
3027 | input_section, | |
c434dee6 | 3028 | (long) rel->r_offset, |
843fe662 | 3029 | howto->name, |
c434dee6 AJ |
3030 | h->root.root.string); |
3031 | ||
8d88c4ca | 3032 | r = _bfd_final_link_relocate (howto, input_bfd, input_section, |
c434dee6 AJ |
3033 | contents, rel->r_offset, |
3034 | relocation, rel->r_addend); | |
8d88c4ca NC |
3035 | |
3036 | if (r != bfd_reloc_ok) | |
8da6118f | 3037 | { |
c434dee6 AJ |
3038 | const char *name; |
3039 | ||
3040 | if (h != NULL) | |
3041 | name = h->root.root.string; | |
3042 | else | |
8da6118f | 3043 | { |
c434dee6 AJ |
3044 | name = bfd_elf_string_from_elf_section (input_bfd, |
3045 | symtab_hdr->sh_link, | |
3046 | sym->st_name); | |
3047 | if (name == NULL) | |
b34976b6 | 3048 | return FALSE; |
c434dee6 AJ |
3049 | if (*name == '\0') |
3050 | name = bfd_section_name (input_bfd, sec); | |
3051 | } | |
3052 | ||
3053 | if (r == bfd_reloc_overflow) | |
3054 | { | |
c434dee6 | 3055 | if (! ((*info->callbacks->reloc_overflow) |
dfeffb9f L |
3056 | (info, (h ? &h->root : NULL), name, howto->name, |
3057 | (bfd_vma) 0, input_bfd, input_section, | |
3058 | rel->r_offset))) | |
b34976b6 | 3059 | return FALSE; |
c434dee6 AJ |
3060 | } |
3061 | else | |
3062 | { | |
3063 | (*_bfd_error_handler) | |
d003868e AM |
3064 | (_("%B(%A+0x%lx): reloc against `%s': error %d"), |
3065 | input_bfd, input_section, | |
c434dee6 | 3066 | (long) rel->r_offset, name, (int) r); |
b34976b6 | 3067 | return FALSE; |
8da6118f KH |
3068 | } |
3069 | } | |
8d88c4ca | 3070 | } |
70256ad8 | 3071 | |
b34976b6 | 3072 | return TRUE; |
70256ad8 AJ |
3073 | } |
3074 | ||
3075 | /* Finish up dynamic symbol handling. We set the contents of various | |
3076 | dynamic sections here. */ | |
3077 | ||
b34976b6 | 3078 | static bfd_boolean |
27482721 AJ |
3079 | elf64_x86_64_finish_dynamic_symbol (bfd *output_bfd, |
3080 | struct bfd_link_info *info, | |
3081 | struct elf_link_hash_entry *h, | |
3082 | Elf_Internal_Sym *sym) | |
70256ad8 | 3083 | { |
c434dee6 | 3084 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 | 3085 | |
c434dee6 | 3086 | htab = elf64_x86_64_hash_table (info); |
70256ad8 AJ |
3087 | |
3088 | if (h->plt.offset != (bfd_vma) -1) | |
3089 | { | |
70256ad8 AJ |
3090 | bfd_vma plt_index; |
3091 | bfd_vma got_offset; | |
3092 | Elf_Internal_Rela rela; | |
947216bf | 3093 | bfd_byte *loc; |
70256ad8 AJ |
3094 | |
3095 | /* This symbol has an entry in the procedure linkage table. Set | |
407443a3 | 3096 | it up. */ |
c434dee6 AJ |
3097 | if (h->dynindx == -1 |
3098 | || htab->splt == NULL | |
3099 | || htab->sgotplt == NULL | |
3100 | || htab->srelplt == NULL) | |
3101 | abort (); | |
70256ad8 AJ |
3102 | |
3103 | /* Get the index in the procedure linkage table which | |
3104 | corresponds to this symbol. This is the index of this symbol | |
3105 | in all the symbols for which we are making plt entries. The | |
3106 | first entry in the procedure linkage table is reserved. */ | |
3107 | plt_index = h->plt.offset / PLT_ENTRY_SIZE - 1; | |
3108 | ||
3109 | /* Get the offset into the .got table of the entry that | |
407443a3 | 3110 | corresponds to this function. Each .got entry is GOT_ENTRY_SIZE |
fe4770f4 | 3111 | bytes. The first three are reserved for the dynamic linker. */ |
70256ad8 AJ |
3112 | got_offset = (plt_index + 3) * GOT_ENTRY_SIZE; |
3113 | ||
3114 | /* Fill in the entry in the procedure linkage table. */ | |
c434dee6 | 3115 | memcpy (htab->splt->contents + h->plt.offset, elf64_x86_64_plt_entry, |
70256ad8 AJ |
3116 | PLT_ENTRY_SIZE); |
3117 | ||
3118 | /* Insert the relocation positions of the plt section. The magic | |
3119 | numbers at the end of the statements are the positions of the | |
3120 | relocations in the plt section. */ | |
653165cc AJ |
3121 | /* Put offset for jmp *name@GOTPCREL(%rip), since the |
3122 | instruction uses 6 bytes, subtract this value. */ | |
3123 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3124 | (htab->sgotplt->output_section->vma |
3125 | + htab->sgotplt->output_offset | |
653165cc | 3126 | + got_offset |
c434dee6 AJ |
3127 | - htab->splt->output_section->vma |
3128 | - htab->splt->output_offset | |
653165cc AJ |
3129 | - h->plt.offset |
3130 | - 6), | |
c434dee6 | 3131 | htab->splt->contents + h->plt.offset + 2); |
653165cc AJ |
3132 | /* Put relocation index. */ |
3133 | bfd_put_32 (output_bfd, plt_index, | |
c434dee6 | 3134 | htab->splt->contents + h->plt.offset + 7); |
653165cc AJ |
3135 | /* Put offset for jmp .PLT0. */ |
3136 | bfd_put_32 (output_bfd, - (h->plt.offset + PLT_ENTRY_SIZE), | |
c434dee6 | 3137 | htab->splt->contents + h->plt.offset + 12); |
70256ad8 | 3138 | |
653165cc AJ |
3139 | /* Fill in the entry in the global offset table, initially this |
3140 | points to the pushq instruction in the PLT which is at offset 6. */ | |
c434dee6 AJ |
3141 | bfd_put_64 (output_bfd, (htab->splt->output_section->vma |
3142 | + htab->splt->output_offset | |
70256ad8 | 3143 | + h->plt.offset + 6), |
c434dee6 | 3144 | htab->sgotplt->contents + got_offset); |
70256ad8 AJ |
3145 | |
3146 | /* Fill in the entry in the .rela.plt section. */ | |
c434dee6 AJ |
3147 | rela.r_offset = (htab->sgotplt->output_section->vma |
3148 | + htab->sgotplt->output_offset | |
70256ad8 AJ |
3149 | + got_offset); |
3150 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_JUMP_SLOT); | |
3151 | rela.r_addend = 0; | |
947216bf | 3152 | loc = htab->srelplt->contents + plt_index * sizeof (Elf64_External_Rela); |
c434dee6 | 3153 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 | 3154 | |
f5385ebf | 3155 | if (!h->def_regular) |
70256ad8 AJ |
3156 | { |
3157 | /* Mark the symbol as undefined, rather than as defined in | |
47a9f7b3 JJ |
3158 | the .plt section. Leave the value if there were any |
3159 | relocations where pointer equality matters (this is a clue | |
c434dee6 AJ |
3160 | for the dynamic linker, to make function pointer |
3161 | comparisons work between an application and shared | |
47a9f7b3 JJ |
3162 | library), otherwise set it to zero. If a function is only |
3163 | called from a binary, there is no need to slow down | |
3164 | shared libraries because of that. */ | |
70256ad8 | 3165 | sym->st_shndx = SHN_UNDEF; |
f5385ebf | 3166 | if (!h->pointer_equality_needed) |
47a9f7b3 | 3167 | sym->st_value = 0; |
70256ad8 AJ |
3168 | } |
3169 | } | |
3170 | ||
bffbf940 | 3171 | if (h->got.offset != (bfd_vma) -1 |
67a4f2b7 | 3172 | && ! GOT_TLS_GD_ANY_P (elf64_x86_64_hash_entry (h)->tls_type) |
bffbf940 | 3173 | && elf64_x86_64_hash_entry (h)->tls_type != GOT_TLS_IE) |
053579d7 | 3174 | { |
053579d7 | 3175 | Elf_Internal_Rela rela; |
947216bf | 3176 | bfd_byte *loc; |
053579d7 AJ |
3177 | |
3178 | /* This symbol has an entry in the global offset table. Set it | |
bffbf940 | 3179 | up. */ |
c434dee6 AJ |
3180 | if (htab->sgot == NULL || htab->srelgot == NULL) |
3181 | abort (); | |
053579d7 | 3182 | |
c434dee6 AJ |
3183 | rela.r_offset = (htab->sgot->output_section->vma |
3184 | + htab->sgot->output_offset | |
dc810e39 | 3185 | + (h->got.offset &~ (bfd_vma) 1)); |
053579d7 AJ |
3186 | |
3187 | /* If this is a static link, or it is a -Bsymbolic link and the | |
3188 | symbol is defined locally or was forced to be local because | |
3189 | of a version file, we just want to emit a RELATIVE reloc. | |
3190 | The entry in the global offset table will already have been | |
3191 | initialized in the relocate_section function. */ | |
c434dee6 | 3192 | if (info->shared |
27482721 | 3193 | && SYMBOL_REFERENCES_LOCAL (info, h)) |
053579d7 | 3194 | { |
cc78d0af | 3195 | BFD_ASSERT((h->got.offset & 1) != 0); |
053579d7 AJ |
3196 | rela.r_info = ELF64_R_INFO (0, R_X86_64_RELATIVE); |
3197 | rela.r_addend = (h->root.u.def.value | |
3198 | + h->root.u.def.section->output_section->vma | |
3199 | + h->root.u.def.section->output_offset); | |
3200 | } | |
3201 | else | |
3202 | { | |
3203 | BFD_ASSERT((h->got.offset & 1) == 0); | |
c434dee6 AJ |
3204 | bfd_put_64 (output_bfd, (bfd_vma) 0, |
3205 | htab->sgot->contents + h->got.offset); | |
053579d7 AJ |
3206 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_GLOB_DAT); |
3207 | rela.r_addend = 0; | |
3208 | } | |
3209 | ||
947216bf AM |
3210 | loc = htab->srelgot->contents; |
3211 | loc += htab->srelgot->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3212 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
053579d7 AJ |
3213 | } |
3214 | ||
f5385ebf | 3215 | if (h->needs_copy) |
70256ad8 | 3216 | { |
70256ad8 | 3217 | Elf_Internal_Rela rela; |
947216bf | 3218 | bfd_byte *loc; |
70256ad8 AJ |
3219 | |
3220 | /* This symbol needs a copy reloc. Set it up. */ | |
3221 | ||
c434dee6 AJ |
3222 | if (h->dynindx == -1 |
3223 | || (h->root.type != bfd_link_hash_defined | |
3224 | && h->root.type != bfd_link_hash_defweak) | |
3225 | || htab->srelbss == NULL) | |
3226 | abort (); | |
70256ad8 AJ |
3227 | |
3228 | rela.r_offset = (h->root.u.def.value | |
3229 | + h->root.u.def.section->output_section->vma | |
3230 | + h->root.u.def.section->output_offset); | |
3231 | rela.r_info = ELF64_R_INFO (h->dynindx, R_X86_64_COPY); | |
3232 | rela.r_addend = 0; | |
947216bf AM |
3233 | loc = htab->srelbss->contents; |
3234 | loc += htab->srelbss->reloc_count++ * sizeof (Elf64_External_Rela); | |
c434dee6 | 3235 | bfd_elf64_swap_reloca_out (output_bfd, &rela, loc); |
70256ad8 AJ |
3236 | } |
3237 | ||
3238 | /* Mark _DYNAMIC and _GLOBAL_OFFSET_TABLE_ as absolute. */ | |
3239 | if (strcmp (h->root.root.string, "_DYNAMIC") == 0 | |
22edb2f1 | 3240 | || h == htab->elf.hgot) |
70256ad8 AJ |
3241 | sym->st_shndx = SHN_ABS; |
3242 | ||
b34976b6 | 3243 | return TRUE; |
70256ad8 AJ |
3244 | } |
3245 | ||
c434dee6 AJ |
3246 | /* Used to decide how to sort relocs in an optimal manner for the |
3247 | dynamic linker, before writing them out. */ | |
3248 | ||
3249 | static enum elf_reloc_type_class | |
27482721 | 3250 | elf64_x86_64_reloc_type_class (const Elf_Internal_Rela *rela) |
c434dee6 AJ |
3251 | { |
3252 | switch ((int) ELF64_R_TYPE (rela->r_info)) | |
3253 | { | |
3254 | case R_X86_64_RELATIVE: | |
3255 | return reloc_class_relative; | |
3256 | case R_X86_64_JUMP_SLOT: | |
3257 | return reloc_class_plt; | |
3258 | case R_X86_64_COPY: | |
3259 | return reloc_class_copy; | |
3260 | default: | |
3261 | return reloc_class_normal; | |
3262 | } | |
3263 | } | |
3264 | ||
70256ad8 AJ |
3265 | /* Finish up the dynamic sections. */ |
3266 | ||
b34976b6 | 3267 | static bfd_boolean |
27482721 | 3268 | elf64_x86_64_finish_dynamic_sections (bfd *output_bfd, struct bfd_link_info *info) |
70256ad8 | 3269 | { |
c434dee6 | 3270 | struct elf64_x86_64_link_hash_table *htab; |
70256ad8 AJ |
3271 | bfd *dynobj; |
3272 | asection *sdyn; | |
70256ad8 | 3273 | |
c434dee6 AJ |
3274 | htab = elf64_x86_64_hash_table (info); |
3275 | dynobj = htab->elf.dynobj; | |
70256ad8 AJ |
3276 | sdyn = bfd_get_section_by_name (dynobj, ".dynamic"); |
3277 | ||
c434dee6 | 3278 | if (htab->elf.dynamic_sections_created) |
70256ad8 | 3279 | { |
70256ad8 AJ |
3280 | Elf64_External_Dyn *dyncon, *dynconend; |
3281 | ||
c434dee6 AJ |
3282 | if (sdyn == NULL || htab->sgot == NULL) |
3283 | abort (); | |
70256ad8 AJ |
3284 | |
3285 | dyncon = (Elf64_External_Dyn *) sdyn->contents; | |
eea6121a | 3286 | dynconend = (Elf64_External_Dyn *) (sdyn->contents + sdyn->size); |
70256ad8 AJ |
3287 | for (; dyncon < dynconend; dyncon++) |
3288 | { | |
3289 | Elf_Internal_Dyn dyn; | |
70256ad8 AJ |
3290 | asection *s; |
3291 | ||
3292 | bfd_elf64_swap_dyn_in (dynobj, dyncon, &dyn); | |
3293 | ||
3294 | switch (dyn.d_tag) | |
3295 | { | |
3296 | default: | |
053579d7 | 3297 | continue; |
70256ad8 AJ |
3298 | |
3299 | case DT_PLTGOT: | |
8c37241b JJ |
3300 | s = htab->sgotplt; |
3301 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset; | |
c434dee6 | 3302 | break; |
70256ad8 AJ |
3303 | |
3304 | case DT_JMPREL: | |
c434dee6 AJ |
3305 | dyn.d_un.d_ptr = htab->srelplt->output_section->vma; |
3306 | break; | |
70256ad8 | 3307 | |
c434dee6 AJ |
3308 | case DT_PLTRELSZ: |
3309 | s = htab->srelplt->output_section; | |
eea6121a | 3310 | dyn.d_un.d_val = s->size; |
70256ad8 AJ |
3311 | break; |
3312 | ||
3313 | case DT_RELASZ: | |
c434dee6 AJ |
3314 | /* The procedure linkage table relocs (DT_JMPREL) should |
3315 | not be included in the overall relocs (DT_RELA). | |
3316 | Therefore, we override the DT_RELASZ entry here to | |
3317 | make it not include the JMPREL relocs. Since the | |
3318 | linker script arranges for .rela.plt to follow all | |
3319 | other relocation sections, we don't have to worry | |
3320 | about changing the DT_RELA entry. */ | |
3321 | if (htab->srelplt != NULL) | |
70256ad8 | 3322 | { |
c434dee6 | 3323 | s = htab->srelplt->output_section; |
eea6121a | 3324 | dyn.d_un.d_val -= s->size; |
70256ad8 AJ |
3325 | } |
3326 | break; | |
67a4f2b7 AO |
3327 | |
3328 | case DT_TLSDESC_PLT: | |
3329 | s = htab->splt; | |
3330 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
3331 | + htab->tlsdesc_plt; | |
3332 | break; | |
3333 | ||
3334 | case DT_TLSDESC_GOT: | |
3335 | s = htab->sgot; | |
3336 | dyn.d_un.d_ptr = s->output_section->vma + s->output_offset | |
3337 | + htab->tlsdesc_got; | |
3338 | break; | |
70256ad8 | 3339 | } |
c434dee6 | 3340 | |
70256ad8 AJ |
3341 | bfd_elf64_swap_dyn_out (output_bfd, &dyn, dyncon); |
3342 | } | |
3343 | ||
c434dee6 | 3344 | /* Fill in the special first entry in the procedure linkage table. */ |
eea6121a | 3345 | if (htab->splt && htab->splt->size > 0) |
70256ad8 | 3346 | { |
653165cc | 3347 | /* Fill in the first entry in the procedure linkage table. */ |
c434dee6 AJ |
3348 | memcpy (htab->splt->contents, elf64_x86_64_plt0_entry, |
3349 | PLT_ENTRY_SIZE); | |
653165cc AJ |
3350 | /* Add offset for pushq GOT+8(%rip), since the instruction |
3351 | uses 6 bytes subtract this value. */ | |
3352 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3353 | (htab->sgotplt->output_section->vma |
3354 | + htab->sgotplt->output_offset | |
653165cc | 3355 | + 8 |
c434dee6 AJ |
3356 | - htab->splt->output_section->vma |
3357 | - htab->splt->output_offset | |
653165cc | 3358 | - 6), |
c434dee6 | 3359 | htab->splt->contents + 2); |
653165cc AJ |
3360 | /* Add offset for jmp *GOT+16(%rip). The 12 is the offset to |
3361 | the end of the instruction. */ | |
3362 | bfd_put_32 (output_bfd, | |
c434dee6 AJ |
3363 | (htab->sgotplt->output_section->vma |
3364 | + htab->sgotplt->output_offset | |
653165cc | 3365 | + 16 |
c434dee6 AJ |
3366 | - htab->splt->output_section->vma |
3367 | - htab->splt->output_offset | |
653165cc | 3368 | - 12), |
c434dee6 | 3369 | htab->splt->contents + 8); |
653165cc | 3370 | |
c434dee6 AJ |
3371 | elf_section_data (htab->splt->output_section)->this_hdr.sh_entsize = |
3372 | PLT_ENTRY_SIZE; | |
67a4f2b7 AO |
3373 | |
3374 | if (htab->tlsdesc_plt) | |
3375 | { | |
3376 | bfd_put_64 (output_bfd, (bfd_vma) 0, | |
3377 | htab->sgot->contents + htab->tlsdesc_got); | |
3378 | ||
3379 | memcpy (htab->splt->contents + htab->tlsdesc_plt, | |
3380 | elf64_x86_64_plt0_entry, | |
3381 | PLT_ENTRY_SIZE); | |
3382 | ||
3383 | /* Add offset for pushq GOT+8(%rip), since the | |
3384 | instruction uses 6 bytes subtract this value. */ | |
3385 | bfd_put_32 (output_bfd, | |
3386 | (htab->sgotplt->output_section->vma | |
3387 | + htab->sgotplt->output_offset | |
3388 | + 8 | |
3389 | - htab->splt->output_section->vma | |
3390 | - htab->splt->output_offset | |
3391 | - htab->tlsdesc_plt | |
3392 | - 6), | |
3393 | htab->splt->contents + htab->tlsdesc_plt + 2); | |
3394 | /* Add offset for jmp *GOT+TDG(%rip), where TGD stands for | |
3395 | htab->tlsdesc_got. The 12 is the offset to the end of | |
3396 | the instruction. */ | |
3397 | bfd_put_32 (output_bfd, | |
3398 | (htab->sgot->output_section->vma | |
3399 | + htab->sgot->output_offset | |
3400 | + htab->tlsdesc_got | |
3401 | - htab->splt->output_section->vma | |
3402 | - htab->splt->output_offset | |
3403 | - htab->tlsdesc_plt | |
3404 | - 12), | |
3405 | htab->splt->contents + htab->tlsdesc_plt + 8); | |
3406 | } | |
70256ad8 | 3407 | } |
70256ad8 AJ |
3408 | } |
3409 | ||
c434dee6 | 3410 | if (htab->sgotplt) |
70256ad8 | 3411 | { |
c434dee6 | 3412 | /* Fill in the first three entries in the global offset table. */ |
eea6121a | 3413 | if (htab->sgotplt->size > 0) |
c434dee6 AJ |
3414 | { |
3415 | /* Set the first entry in the global offset table to the address of | |
3416 | the dynamic section. */ | |
3417 | if (sdyn == NULL) | |
3418 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents); | |
3419 | else | |
3420 | bfd_put_64 (output_bfd, | |
3421 | sdyn->output_section->vma + sdyn->output_offset, | |
3422 | htab->sgotplt->contents); | |
3423 | /* Write GOT[1] and GOT[2], needed for the dynamic linker. */ | |
3424 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE); | |
3425 | bfd_put_64 (output_bfd, (bfd_vma) 0, htab->sgotplt->contents + GOT_ENTRY_SIZE*2); | |
3426 | } | |
70256ad8 | 3427 | |
c434dee6 AJ |
3428 | elf_section_data (htab->sgotplt->output_section)->this_hdr.sh_entsize = |
3429 | GOT_ENTRY_SIZE; | |
3430 | } | |
70256ad8 | 3431 | |
eea6121a | 3432 | if (htab->sgot && htab->sgot->size > 0) |
8c37241b JJ |
3433 | elf_section_data (htab->sgot->output_section)->this_hdr.sh_entsize |
3434 | = GOT_ENTRY_SIZE; | |
3435 | ||
b34976b6 | 3436 | return TRUE; |
8d88c4ca NC |
3437 | } |
3438 | ||
4c45e5c9 JJ |
3439 | /* Return address for Ith PLT stub in section PLT, for relocation REL |
3440 | or (bfd_vma) -1 if it should not be included. */ | |
3441 | ||
3442 | static bfd_vma | |
3443 | elf64_x86_64_plt_sym_val (bfd_vma i, const asection *plt, | |
3444 | const arelent *rel ATTRIBUTE_UNUSED) | |
3445 | { | |
3446 | return plt->vma + (i + 1) * PLT_ENTRY_SIZE; | |
3447 | } | |
8df9fc9d | 3448 | |
d2b2c203 DJ |
3449 | /* Handle an x86-64 specific section when reading an object file. This |
3450 | is called when elfcode.h finds a section with an unknown type. */ | |
3451 | ||
3452 | static bfd_boolean | |
6dc132d9 L |
3453 | elf64_x86_64_section_from_shdr (bfd *abfd, |
3454 | Elf_Internal_Shdr *hdr, | |
3455 | const char *name, | |
3456 | int shindex) | |
d2b2c203 DJ |
3457 | { |
3458 | if (hdr->sh_type != SHT_X86_64_UNWIND) | |
3459 | return FALSE; | |
3460 | ||
6dc132d9 | 3461 | if (! _bfd_elf_make_section_from_shdr (abfd, hdr, name, shindex)) |
d2b2c203 DJ |
3462 | return FALSE; |
3463 | ||
3464 | return TRUE; | |
3465 | } | |
3466 | ||
3b22753a L |
3467 | /* Hook called by the linker routine which adds symbols from an object |
3468 | file. We use it to put SHN_X86_64_LCOMMON items in .lbss, instead | |
3469 | of .bss. */ | |
3470 | ||
3471 | static bfd_boolean | |
3472 | elf64_x86_64_add_symbol_hook (bfd *abfd, | |
3473 | struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3474 | Elf_Internal_Sym *sym, | |
3475 | const char **namep ATTRIBUTE_UNUSED, | |
3476 | flagword *flagsp ATTRIBUTE_UNUSED, | |
3477 | asection **secp, bfd_vma *valp) | |
3478 | { | |
3479 | asection *lcomm; | |
3480 | ||
3481 | switch (sym->st_shndx) | |
3482 | { | |
3483 | case SHN_X86_64_LCOMMON: | |
3484 | lcomm = bfd_get_section_by_name (abfd, "LARGE_COMMON"); | |
3485 | if (lcomm == NULL) | |
3486 | { | |
3487 | lcomm = bfd_make_section_with_flags (abfd, | |
3488 | "LARGE_COMMON", | |
3489 | (SEC_ALLOC | |
3490 | | SEC_IS_COMMON | |
3491 | | SEC_LINKER_CREATED)); | |
3492 | if (lcomm == NULL) | |
3493 | return FALSE; | |
3494 | elf_section_flags (lcomm) |= SHF_X86_64_LARGE; | |
3495 | } | |
3496 | *secp = lcomm; | |
3497 | *valp = sym->st_size; | |
3498 | break; | |
3499 | } | |
3500 | return TRUE; | |
3501 | } | |
3502 | ||
3503 | ||
3504 | /* Given a BFD section, try to locate the corresponding ELF section | |
3505 | index. */ | |
3506 | ||
3507 | static bfd_boolean | |
3508 | elf64_x86_64_elf_section_from_bfd_section (bfd *abfd ATTRIBUTE_UNUSED, | |
3509 | asection *sec, int *index) | |
3510 | { | |
3511 | if (sec == &_bfd_elf_large_com_section) | |
3512 | { | |
3513 | *index = SHN_X86_64_LCOMMON; | |
3514 | return TRUE; | |
3515 | } | |
3516 | return FALSE; | |
3517 | } | |
3518 | ||
3519 | /* Process a symbol. */ | |
3520 | ||
3521 | static void | |
3522 | elf64_x86_64_symbol_processing (bfd *abfd ATTRIBUTE_UNUSED, | |
3523 | asymbol *asym) | |
3524 | { | |
3525 | elf_symbol_type *elfsym = (elf_symbol_type *) asym; | |
3526 | ||
3527 | switch (elfsym->internal_elf_sym.st_shndx) | |
3528 | { | |
3529 | case SHN_X86_64_LCOMMON: | |
3530 | asym->section = &_bfd_elf_large_com_section; | |
3531 | asym->value = elfsym->internal_elf_sym.st_size; | |
3532 | /* Common symbol doesn't set BSF_GLOBAL. */ | |
3533 | asym->flags &= ~BSF_GLOBAL; | |
3534 | break; | |
3535 | } | |
3536 | } | |
3537 | ||
3538 | static bfd_boolean | |
3539 | elf64_x86_64_common_definition (Elf_Internal_Sym *sym) | |
3540 | { | |
3541 | return (sym->st_shndx == SHN_COMMON | |
3542 | || sym->st_shndx == SHN_X86_64_LCOMMON); | |
3543 | } | |
3544 | ||
3545 | static unsigned int | |
3546 | elf64_x86_64_common_section_index (asection *sec) | |
3547 | { | |
3548 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
3549 | return SHN_COMMON; | |
3550 | else | |
3551 | return SHN_X86_64_LCOMMON; | |
3552 | } | |
3553 | ||
3554 | static asection * | |
3555 | elf64_x86_64_common_section (asection *sec) | |
3556 | { | |
3557 | if ((elf_section_flags (sec) & SHF_X86_64_LARGE) == 0) | |
3558 | return bfd_com_section_ptr; | |
3559 | else | |
3560 | return &_bfd_elf_large_com_section; | |
3561 | } | |
3562 | ||
3563 | static bfd_boolean | |
3564 | elf64_x86_64_merge_symbol (struct bfd_link_info *info ATTRIBUTE_UNUSED, | |
3565 | struct elf_link_hash_entry **sym_hash ATTRIBUTE_UNUSED, | |
3566 | struct elf_link_hash_entry *h, | |
3567 | Elf_Internal_Sym *sym, | |
00492999 | 3568 | asection **psec, |
3b22753a L |
3569 | bfd_vma *pvalue ATTRIBUTE_UNUSED, |
3570 | unsigned int *pold_alignment ATTRIBUTE_UNUSED, | |
3571 | bfd_boolean *skip ATTRIBUTE_UNUSED, | |
3572 | bfd_boolean *override ATTRIBUTE_UNUSED, | |
3573 | bfd_boolean *type_change_ok ATTRIBUTE_UNUSED, | |
3574 | bfd_boolean *size_change_ok ATTRIBUTE_UNUSED, | |
3575 | bfd_boolean *newdef ATTRIBUTE_UNUSED, | |
3576 | bfd_boolean *newdyn, | |
3577 | bfd_boolean *newdyncommon ATTRIBUTE_UNUSED, | |
3578 | bfd_boolean *newweak ATTRIBUTE_UNUSED, | |
3579 | bfd *abfd ATTRIBUTE_UNUSED, | |
3580 | asection **sec, | |
3581 | bfd_boolean *olddef ATTRIBUTE_UNUSED, | |
3582 | bfd_boolean *olddyn, | |
3583 | bfd_boolean *olddyncommon ATTRIBUTE_UNUSED, | |
3584 | bfd_boolean *oldweak ATTRIBUTE_UNUSED, | |
00492999 | 3585 | bfd *oldbfd, |
3b22753a L |
3586 | asection **oldsec) |
3587 | { | |
3588 | /* A normal common symbol and a large common symbol result in a | |
00492999 L |
3589 | normal common symbol. We turn the large common symbol into a |
3590 | normal one. */ | |
3b22753a L |
3591 | if (!*olddyn |
3592 | && h->root.type == bfd_link_hash_common | |
3593 | && !*newdyn | |
3594 | && bfd_is_com_section (*sec) | |
00492999 | 3595 | && *oldsec != *sec) |
3b22753a | 3596 | { |
00492999 L |
3597 | if (sym->st_shndx == SHN_COMMON |
3598 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) != 0) | |
3599 | { | |
3600 | h->root.u.c.p->section | |
3601 | = bfd_make_section_old_way (oldbfd, "COMMON"); | |
3602 | h->root.u.c.p->section->flags = SEC_ALLOC; | |
3603 | } | |
3604 | else if (sym->st_shndx == SHN_X86_64_LCOMMON | |
3605 | && (elf_section_flags (*oldsec) & SHF_X86_64_LARGE) == 0) | |
9a2e389a | 3606 | *psec = *sec = bfd_com_section_ptr; |
3b22753a L |
3607 | } |
3608 | ||
3609 | return TRUE; | |
3610 | } | |
3611 | ||
3612 | static int | |
a6b96beb AM |
3613 | elf64_x86_64_additional_program_headers (bfd *abfd, |
3614 | struct bfd_link_info *info ATTRIBUTE_UNUSED) | |
3b22753a L |
3615 | { |
3616 | asection *s; | |
9a2e389a | 3617 | int count = 0; |
3b22753a L |
3618 | |
3619 | /* Check to see if we need a large readonly segment. */ | |
3620 | s = bfd_get_section_by_name (abfd, ".lrodata"); | |
3621 | if (s && (s->flags & SEC_LOAD)) | |
3622 | count++; | |
3623 | ||
3624 | /* Check to see if we need a large data segment. Since .lbss sections | |
3625 | is placed right after the .bss section, there should be no need for | |
3626 | a large data segment just because of .lbss. */ | |
3627 | s = bfd_get_section_by_name (abfd, ".ldata"); | |
3628 | if (s && (s->flags & SEC_LOAD)) | |
3629 | count++; | |
3630 | ||
3631 | return count; | |
3632 | } | |
3633 | ||
fdc90cb4 JJ |
3634 | /* Return TRUE if symbol should be hashed in the `.gnu.hash' section. */ |
3635 | ||
3636 | static bfd_boolean | |
3637 | elf64_x86_64_hash_symbol (struct elf_link_hash_entry *h) | |
3638 | { | |
3639 | if (h->plt.offset != (bfd_vma) -1 | |
3640 | && !h->def_regular | |
3641 | && !h->pointer_equality_needed) | |
3642 | return FALSE; | |
3643 | ||
3644 | return _bfd_elf_hash_symbol (h); | |
3645 | } | |
3646 | ||
9a2e389a | 3647 | static const struct bfd_elf_special_section |
3b22753a L |
3648 | elf64_x86_64_special_sections[]= |
3649 | { | |
0112cd26 NC |
3650 | { STRING_COMMA_LEN (".gnu.linkonce.lb"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, |
3651 | { STRING_COMMA_LEN (".gnu.linkonce.lr"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3652 | { STRING_COMMA_LEN (".gnu.linkonce.lt"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_EXECINSTR + SHF_X86_64_LARGE}, | |
3653 | { STRING_COMMA_LEN (".lbss"), -2, SHT_NOBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3654 | { STRING_COMMA_LEN (".ldata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_WRITE + SHF_X86_64_LARGE}, | |
3655 | { STRING_COMMA_LEN (".lrodata"), -2, SHT_PROGBITS, SHF_ALLOC + SHF_X86_64_LARGE}, | |
3656 | { NULL, 0, 0, 0, 0 } | |
3b22753a L |
3657 | }; |
3658 | ||
70256ad8 AJ |
3659 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_vec |
3660 | #define TARGET_LITTLE_NAME "elf64-x86-64" | |
3661 | #define ELF_ARCH bfd_arch_i386 | |
3662 | #define ELF_MACHINE_CODE EM_X86_64 | |
f7661549 | 3663 | #define ELF_MAXPAGESIZE 0x200000 |
2043964e | 3664 | #define ELF_MINPAGESIZE 0x1000 |
24718e3b | 3665 | #define ELF_COMMONPAGESIZE 0x1000 |
70256ad8 AJ |
3666 | |
3667 | #define elf_backend_can_gc_sections 1 | |
51b64d56 | 3668 | #define elf_backend_can_refcount 1 |
70256ad8 AJ |
3669 | #define elf_backend_want_got_plt 1 |
3670 | #define elf_backend_plt_readonly 1 | |
3671 | #define elf_backend_want_plt_sym 0 | |
3672 | #define elf_backend_got_header_size (GOT_ENTRY_SIZE*3) | |
b491616a | 3673 | #define elf_backend_rela_normal 1 |
70256ad8 AJ |
3674 | |
3675 | #define elf_info_to_howto elf64_x86_64_info_to_howto | |
70256ad8 | 3676 | |
70256ad8 AJ |
3677 | #define bfd_elf64_bfd_link_hash_table_create \ |
3678 | elf64_x86_64_link_hash_table_create | |
407443a3 | 3679 | #define bfd_elf64_bfd_reloc_type_lookup elf64_x86_64_reloc_type_lookup |
157090f7 AM |
3680 | #define bfd_elf64_bfd_reloc_name_lookup \ |
3681 | elf64_x86_64_reloc_name_lookup | |
70256ad8 AJ |
3682 | |
3683 | #define elf_backend_adjust_dynamic_symbol elf64_x86_64_adjust_dynamic_symbol | |
3684 | #define elf_backend_check_relocs elf64_x86_64_check_relocs | |
c434dee6 AJ |
3685 | #define elf_backend_copy_indirect_symbol elf64_x86_64_copy_indirect_symbol |
3686 | #define elf_backend_create_dynamic_sections elf64_x86_64_create_dynamic_sections | |
3687 | #define elf_backend_finish_dynamic_sections elf64_x86_64_finish_dynamic_sections | |
70256ad8 AJ |
3688 | #define elf_backend_finish_dynamic_symbol elf64_x86_64_finish_dynamic_symbol |
3689 | #define elf_backend_gc_mark_hook elf64_x86_64_gc_mark_hook | |
3690 | #define elf_backend_gc_sweep_hook elf64_x86_64_gc_sweep_hook | |
3bab7989 ML |
3691 | #define elf_backend_grok_prstatus elf64_x86_64_grok_prstatus |
3692 | #define elf_backend_grok_psinfo elf64_x86_64_grok_psinfo | |
c434dee6 | 3693 | #define elf_backend_reloc_type_class elf64_x86_64_reloc_type_class |
70256ad8 AJ |
3694 | #define elf_backend_relocate_section elf64_x86_64_relocate_section |
3695 | #define elf_backend_size_dynamic_sections elf64_x86_64_size_dynamic_sections | |
67a4f2b7 | 3696 | #define elf_backend_always_size_sections elf64_x86_64_always_size_sections |
74541ad4 | 3697 | #define elf_backend_init_index_section _bfd_elf_init_1_index_section |
4c45e5c9 | 3698 | #define elf_backend_plt_sym_val elf64_x86_64_plt_sym_val |
407443a3 | 3699 | #define elf_backend_object_p elf64_x86_64_elf_object_p |
bffbf940 | 3700 | #define bfd_elf64_mkobject elf64_x86_64_mkobject |
8d88c4ca | 3701 | |
d2b2c203 DJ |
3702 | #define elf_backend_section_from_shdr \ |
3703 | elf64_x86_64_section_from_shdr | |
3704 | ||
3b22753a L |
3705 | #define elf_backend_section_from_bfd_section \ |
3706 | elf64_x86_64_elf_section_from_bfd_section | |
3707 | #define elf_backend_add_symbol_hook \ | |
3708 | elf64_x86_64_add_symbol_hook | |
3709 | #define elf_backend_symbol_processing \ | |
3710 | elf64_x86_64_symbol_processing | |
3711 | #define elf_backend_common_section_index \ | |
3712 | elf64_x86_64_common_section_index | |
3713 | #define elf_backend_common_section \ | |
3714 | elf64_x86_64_common_section | |
3715 | #define elf_backend_common_definition \ | |
3716 | elf64_x86_64_common_definition | |
3717 | #define elf_backend_merge_symbol \ | |
3718 | elf64_x86_64_merge_symbol | |
3719 | #define elf_backend_special_sections \ | |
3720 | elf64_x86_64_special_sections | |
3721 | #define elf_backend_additional_program_headers \ | |
3722 | elf64_x86_64_additional_program_headers | |
fdc90cb4 JJ |
3723 | #define elf_backend_hash_symbol \ |
3724 | elf64_x86_64_hash_symbol | |
3b22753a | 3725 | |
8d88c4ca | 3726 | #include "elf64-target.h" |
9d7cbccd NC |
3727 | |
3728 | /* FreeBSD support. */ | |
3729 | ||
3730 | #undef TARGET_LITTLE_SYM | |
3731 | #define TARGET_LITTLE_SYM bfd_elf64_x86_64_freebsd_vec | |
3732 | #undef TARGET_LITTLE_NAME | |
3733 | #define TARGET_LITTLE_NAME "elf64-x86-64-freebsd" | |
3734 | ||
d1036acb L |
3735 | #undef ELF_OSABI |
3736 | #define ELF_OSABI ELFOSABI_FREEBSD | |
9d7cbccd NC |
3737 | |
3738 | #undef elf_backend_post_process_headers | |
d1036acb | 3739 | #define elf_backend_post_process_headers _bfd_elf_set_osabi |
9d7cbccd NC |
3740 | |
3741 | #undef elf64_bed | |
3742 | #define elf64_bed elf64_x86_64_fbsd_bed | |
3743 | ||
3744 | #include "elf64-target.h" |