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[releases.git] / x86 / entry / vdso / extable.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 #ifndef __VDSO_EXTABLE_H
3 #define __VDSO_EXTABLE_H
4
5 /*
6  * Inject exception fixup for vDSO code.  Unlike normal exception fixup,
7  * vDSO uses a dedicated handler the addresses are relative to the overall
8  * exception table, not each individual entry.
9  */
10 #ifdef __ASSEMBLY__
11 #define _ASM_VDSO_EXTABLE_HANDLE(from, to)      \
12         ASM_VDSO_EXTABLE_HANDLE from to
13
14 .macro ASM_VDSO_EXTABLE_HANDLE from:req to:req
15         .pushsection __ex_table, "a"
16         .long (\from) - __ex_table
17         .long (\to) - __ex_table
18         .popsection
19 .endm
20 #else
21 #define _ASM_VDSO_EXTABLE_HANDLE(from, to)      \
22         ".pushsection __ex_table, \"a\"\n"      \
23         ".long (" #from ") - __ex_table\n"      \
24         ".long (" #to ") - __ex_table\n"        \
25         ".popsection\n"
26 #endif
27
28 #endif /* __VDSO_EXTABLE_H */