mirror of
https://github.com/torvalds/linux
synced 2024-11-05 18:23:50 +00:00
049cdefe19
As mentioned before, the size of the bug frame can be further reduced while continuing to use instructions to encode the information. Signed-off-by: Jan Beulich <jbeulich@novell.com> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
34 lines
847 B
C
34 lines
847 B
C
#ifndef __ASM_X8664_BUG_H
|
|
#define __ASM_X8664_BUG_H 1
|
|
|
|
#include <linux/stringify.h>
|
|
|
|
/*
|
|
* Tell the user there is some problem. The exception handler decodes
|
|
* this frame.
|
|
*/
|
|
struct bug_frame {
|
|
unsigned char ud2[2];
|
|
unsigned char push;
|
|
signed int filename;
|
|
unsigned char ret;
|
|
unsigned short line;
|
|
} __attribute__((packed));
|
|
|
|
#ifdef CONFIG_BUG
|
|
#define HAVE_ARCH_BUG
|
|
/* We turn the bug frame into valid instructions to not confuse
|
|
the disassembler. Thanks to Jan Beulich & Suresh Siddha
|
|
for nice instruction selection.
|
|
The magic numbers generate mov $64bitimm,%eax ; ret $offset. */
|
|
#define BUG() \
|
|
asm volatile( \
|
|
"ud2 ; pushq $%c1 ; ret $%c0" :: \
|
|
"i"(__LINE__), "i" (__FILE__))
|
|
void out_of_line_bug(void);
|
|
#else
|
|
static inline void out_of_line_bug(void) { }
|
|
#endif
|
|
|
|
#include <asm-generic/bug.h>
|
|
#endif
|