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author | Al Viro <viro@zeniv.linux.org.uk> | 2016-12-26 00:50:06 -0500 |
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committer | Al Viro <viro@zeniv.linux.org.uk> | 2017-03-28 18:23:54 -0400 |
commit | 527b5baeada26f9660722b4a498d3855d90f276c (patch) | |
tree | ec626095b5ca841e8237f41a79e9d75cdb90a6de /arch/powerpc/include/asm/extable.h | |
parent | d597580d373774b1bdab84b3d26ff0b55162b916 (diff) | |
download | op-kernel-dev-527b5baeada26f9660722b4a498d3855d90f276c.zip op-kernel-dev-527b5baeada26f9660722b4a498d3855d90f276c.tar.gz |
powerpc: switch to extable.h
Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
Diffstat (limited to 'arch/powerpc/include/asm/extable.h')
-rw-r--r-- | arch/powerpc/include/asm/extable.h | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/powerpc/include/asm/extable.h b/arch/powerpc/include/asm/extable.h new file mode 100644 index 0000000..07cc45c --- /dev/null +++ b/arch/powerpc/include/asm/extable.h @@ -0,0 +1,29 @@ +#ifndef _ARCH_POWERPC_EXTABLE_H +#define _ARCH_POWERPC_EXTABLE_H + +/* + * The exception table consists of pairs of relative addresses: the first is + * the address of an instruction that is allowed to fault, and the second is + * the address at which the program should continue. No registers are + * modified, so it is entirely up to the continuation code to figure out what + * to do. + * + * All the routines below use bits of fixup code that are out of line with the + * main instruction path. This means when everything is well, we don't even + * have to jump over them. Further, they do not intrude on our cache or tlb + * entries. + */ + +#define ARCH_HAS_RELATIVE_EXTABLE + +struct exception_table_entry { + int insn; + int fixup; +}; + +static inline unsigned long extable_fixup(const struct exception_table_entry *x) +{ + return (unsigned long)&x->fixup + x->fixup; +} + +#endif |