arch/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 */