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

/* SPDX-License-Identifier: GPL-2.0 */
#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
b2441318	1	/* SPDX-License-Identifier: GPL-2.0 */
527b5bae AV	2	#ifndef _ARCH_POWERPC_EXTABLE_H
	3	#define _ARCH_POWERPC_EXTABLE_H
	4
	5	/*
	6	* The exception table consists of pairs of relative addresses: the first is
	7	* the address of an instruction that is allowed to fault, and the second is
	8	* the address at which the program should continue. No registers are
	9	* modified, so it is entirely up to the continuation code to figure out what
	10	* to do.
	11	*
	12	* All the routines below use bits of fixup code that are out of line with the
	13	* main instruction path. This means when everything is well, we don't even
	14	* have to jump over them. Further, they do not intrude on our cache or tlb
	15	* entries.
	16	*/
	17
	18	#define ARCH_HAS_RELATIVE_EXTABLE
	19
	20	struct exception_table_entry {
	21	int insn;
	22	int fixup;
	23	};
	24
	25	static inline unsigned long extable_fixup(const struct exception_table_entry *x)
	26	{
	27	return (unsigned long)&x->fixup + x->fixup;
	28	}
	29
	30	#endif