| /* SPDX-License-Identifier: GPL-2.0 */ |
| #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 |