67 lines
1.9 KiB
C
67 lines
1.9 KiB
C
#ifndef __ASM_CRISv10_ARCH_BUG_H
|
|
#define __ASM_CRISv10_ARCH_BUG_H
|
|
|
|
#include <linux/stringify.h>
|
|
|
|
#ifdef CONFIG_BUG
|
|
#ifdef CONFIG_DEBUG_BUGVERBOSE
|
|
/* The BUG() macro is used for marking obviously incorrect code paths.
|
|
* It will cause a message with the file name and line number to be printed,
|
|
* and then cause an oops. The message is actually printed by handle_BUG()
|
|
* in arch/cris/kernel/traps.c, and the reason we use this method of storing
|
|
* the file name and line number is that we do not want to affect the registers
|
|
* by calling printk() before causing the oops.
|
|
*/
|
|
|
|
#define BUG_PREFIX 0x0D7F
|
|
#define BUG_MAGIC 0x00001234
|
|
|
|
struct bug_frame {
|
|
unsigned short prefix;
|
|
unsigned int magic;
|
|
unsigned short clear;
|
|
unsigned short movu;
|
|
unsigned short line;
|
|
unsigned short jump;
|
|
unsigned char *filename;
|
|
};
|
|
|
|
#if 0
|
|
/* Unfortunately this version of the macro does not work due to a problem
|
|
* with the compiler (aka a bug) when compiling with -O2, which sometimes
|
|
* erroneously causes the second input to be stored in a register...
|
|
*/
|
|
#define BUG() \
|
|
__asm__ __volatile__ ("clear.d [" __stringify(BUG_MAGIC) "]\n\t"\
|
|
"movu.w %0,$r0\n\t" \
|
|
"jump %1\n\t" \
|
|
: : "i" (__LINE__), "i" (__FILE__))
|
|
#else
|
|
/* This version will have to do for now, until the compiler is fixed.
|
|
* The drawbacks of this version are that the file name will appear multiple
|
|
* times in the .rodata section, and that __LINE__ and __FILE__ can probably
|
|
* not be used like this with newer versions of gcc.
|
|
*/
|
|
#define BUG() \
|
|
__asm__ __volatile__ ("clear.d [" __stringify(BUG_MAGIC) "]\n\t"\
|
|
"movu.w " __stringify(__LINE__) ",$r0\n\t"\
|
|
"jump 0f\n\t" \
|
|
".section .rodata\n" \
|
|
"0:\t.string \"" __FILE__ "\"\n\t" \
|
|
".previous")
|
|
#endif
|
|
|
|
#else
|
|
|
|
/* This just causes an oops. */
|
|
#define BUG() (*(int *)0 = 0)
|
|
|
|
#endif
|
|
|
|
#define HAVE_ARCH_BUG
|
|
#endif
|
|
|
|
#include <asm-generic/bug.h>
|
|
|
|
#endif
|