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#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