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author | Jesper Nilsson <jesper.nilsson@axis.com> | 2008-01-17 10:42:58 +0100 |
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committer | Jesper Nilsson <jesper.nilsson@axis.com> | 2008-02-08 11:06:28 +0100 |
commit | 0dfb8c35703709ca5e8f58e019d72383110999a7 (patch) | |
tree | 825532e0771ed49704f7649029be392e72559b53 /include/asm-cris/arch-v10 | |
parent | fbdb5f865b570e34d6e0d17f327f8d9bc2c4ccc6 (diff) | |
download | op-kernel-dev-0dfb8c35703709ca5e8f58e019d72383110999a7.zip op-kernel-dev-0dfb8c35703709ca5e8f58e019d72383110999a7.tar.gz |
CRIS: Add architecture dependent bug.h for CRIS v10 and CRIS v32
Diffstat (limited to 'include/asm-cris/arch-v10')
-rw-r--r-- | include/asm-cris/arch-v10/bug.h | 66 |
1 files changed, 66 insertions, 0 deletions
diff --git a/include/asm-cris/arch-v10/bug.h b/include/asm-cris/arch-v10/bug.h new file mode 100644 index 0000000..3485d6b --- /dev/null +++ b/include/asm-cris/arch-v10/bug.h @@ -0,0 +1,66 @@ +#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 |