linux/include/asm-x86_64/bug.h
Jeremy Fitzhardinge c31a0bf3e1 [PATCH] Generic BUG for x86-64
This makes x86-64 use the generic BUG machinery.

The main advantage in using the generic BUG machinery for x86-64 is that
the inlined overhead of BUG is just the ud2a instruction; the file+line
information are no longer inlined into the instruction stream.  This
reduces cache pollution.

Signed-off-by: Jeremy Fitzhardinge <jeremy@goop.org>
Cc: Andi Kleen <ak@muc.de>
Cc: Hugh Dickens <hugh@veritas.com>
Cc: Michael Ellerman <michael@ellerman.id.au>
Cc: Paul Mackerras <paulus@samba.org>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Rusty Russell <rusty@rustcorp.com.au>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-12-08 08:28:39 -08:00

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725 B
C

#ifndef __ASM_X8664_BUG_H
#define __ASM_X8664_BUG_H 1
#ifdef CONFIG_BUG
#define HAVE_ARCH_BUG
#ifdef CONFIG_DEBUG_BUGVERBOSE
#define BUG() \
do { \
asm volatile("1:\tud2\n" \
".pushsection __bug_table,\"a\"\n" \
"2:\t.quad 1b, %c0\n" \
"\t.word %c1, 0\n" \
"\t.org 2b+%c2\n" \
".popsection" \
: : "i" (__FILE__), "i" (__LINE__), \
"i" (sizeof(struct bug_entry))); \
for(;;) ; \
} while(0)
#else
#define BUG() \
do { \
asm volatile("ud2"); \
for(;;) ; \
} while(0)
#endif
void out_of_line_bug(void);
#else
static inline void out_of_line_bug(void) { }
#endif
#include <asm-generic/bug.h>
#endif