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x86, asm: Make _ASM_EXTABLE() usable from assembly code 

We have had this convenient macro _ASM_EXTABLE() to generate exception
table entry in inline assembly.  Make it also usable for pure
assembly.

Signed-off-by: H. Peter Anvin <hpa@zytor.com>
This commit is contained in:
H. Peter Anvin 2009-08-31 11:57:20 -07:00
parent fe9b4e4e40
commit 709972b1f6
1 changed files with 9 additions and 1 deletions
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10
arch/x86/include/asm/asm.h
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@ -3,7 +3,7 @@
#ifdef __ASSEMBLY__
# define __ASM_FORM(x) x
# define __ASM_EX_SEC .section __ex_table
# define __ASM_EX_SEC .section __ex_table, "a"
#else
# define __ASM_FORM(x) " " #x " "
# define __ASM_EX_SEC " .section __ex_table,\"a\"\n"
@ -38,10 +38,18 @@
#define _ASM_DI __ASM_REG(di)
/* Exception table entry */
#ifdef __ASSEMBLY__
# define _ASM_EXTABLE(from,to) \
__ASM_EX_SEC ; \
_ASM_ALIGN ; \
_ASM_PTR from , to ; \
.previous
#else
# define _ASM_EXTABLE(from,to) \
__ASM_EX_SEC \
_ASM_ALIGN "\n" \
_ASM_PTR #from "," #to "\n" \
" .previous\n"
#endif
#endif /* _ASM_X86_ASM_H */