[linux-2.6-block.git] / arch / powerpc / include / asm / extable.h

#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
Commit	Line	Data
527b5bae AV	1	#ifndef _ARCH_POWERPC_EXTABLE_H
	2	#define _ARCH_POWERPC_EXTABLE_H
	3
	4	/*
	5	* The exception table consists of pairs of relative addresses: the first is
	6	* the address of an instruction that is allowed to fault, and the second is
	7	* the address at which the program should continue. No registers are
	8	* modified, so it is entirely up to the continuation code to figure out what
	9	* to do.
	10	*
	11	* All the routines below use bits of fixup code that are out of line with the
	12	* main instruction path. This means when everything is well, we don't even
	13	* have to jump over them. Further, they do not intrude on our cache or tlb
	14	* entries.
	15	*/
	16
	17	#define ARCH_HAS_RELATIVE_EXTABLE
	18
	19	struct exception_table_entry {
	20	int insn;
	21	int fixup;
	22	};
	23
	24	static inline unsigned long extable_fixup(const struct exception_table_entry *x)
	25	{
	26	return (unsigned long)&x->fixup + x->fixup;
	27	}
	28
	29	#endif