linux/include/asm-sparc64/kdebug.h
Anil S Keshavamurthy d98f8f0518 [PATCH] Notify page fault call chain for sparc64
Overloading of page fault notification with the notify_die() has performance
issues(since the only interested components for page fault is kprobes and/or
kdb) and hence this patch introduces the new notifier call chain exclusively
for page fault notifications their by avoiding notifying unnecessary
components in the do_page_fault() code path.

Signed-off-by: Anil S Keshavamurthy <anil.s.keshavamurthy@intel.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-06-26 09:58:22 -07:00

52 lines
1.1 KiB
C

#ifndef _SPARC64_KDEBUG_H
#define _SPARC64_KDEBUG_H
/* Nearly identical to x86_64/i386 code. */
#include <linux/notifier.h>
struct pt_regs;
struct die_args {
struct pt_regs *regs;
const char *str;
long err;
int trapnr;
int signr;
};
extern int register_die_notifier(struct notifier_block *);
extern int unregister_die_notifier(struct notifier_block *);
extern int register_page_fault_notifier(struct notifier_block *);
extern int unregister_page_fault_notifier(struct notifier_block *);
extern struct atomic_notifier_head sparc64die_chain;
extern void bad_trap(struct pt_regs *, long);
/* Grossly misnamed. */
enum die_val {
DIE_OOPS = 1,
DIE_DEBUG, /* ta 0x70 */
DIE_DEBUG_2, /* ta 0x71 */
DIE_DIE,
DIE_TRAP,
DIE_TRAP_TL1,
DIE_GPF,
DIE_CALL,
DIE_PAGE_FAULT,
};
static inline int notify_die(enum die_val val,char *str, struct pt_regs *regs,
long err, int trap, int sig)
{
struct die_args args = { .regs = regs,
.str = str,
.err = err,
.trapnr = trap,
.signr = sig };
return atomic_notifier_call_chain(&sparc64die_chain, val, &args);
}
#endif