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[S390] Use generic bug.

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Generic bug implementation for s390. Will increase the value of the
console output on BUG() statements since registers r0-r5,r14 will
not be clobbered by a printk() call that was previously done before
the illegal instruction of BUG() was hit.
Also implements an architecture specific WARN_ON(). Output of that
could be increased but requires common code change.

Signed-off-by: Martin Schwidefsky <[email protected]>
Signed-off-by: Heiko Carstens <[email protected]>
This commit is contained in:
Heiko Carstens 2007-04-27 16:01:42 +02:00 • committed by Martin Schwidefsky
commit c0007f1a65
6 changed files with 89 additions and 18 deletions
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69
include/asm-s390/bug.h
View file

@ -1,27 +1,70 @@
#ifndef _S390_BUG_H
#define _S390_BUG_H
#ifndef _ASM_S390_BUG_H
#define _ASM_S390_BUG_H
#include <linux/kernel.h>
#ifdef CONFIG_BUG
static inline __attribute__((noreturn)) void __do_illegal_op(void)
{
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3)
__builtin_trap();
#ifdef CONFIG_64BIT
#define S390_LONG ".quad"
#else
asm volatile(".long 0");
#define S390_LONG ".long"
#endif
}
#define BUG() do { \
printk("kernel BUG at %s:%d!\n", __FILE__, __LINE__); \
__do_illegal_op(); \
#ifdef CONFIG_DEBUG_BUGVERBOSE
#define __EMIT_BUG(x) do { \
asm volatile( \
"0: j 0b+2\n" \
"1:\n" \
".section .rodata.str,\"aMS\",@progbits,1\n" \
"2: .asciz \""__FILE__"\"\n" \
".previous\n" \
".section __bug_table,\"a\"\n" \
"3:\t" S390_LONG "\t1b,2b\n" \
" .short %0,%1\n" \
" .org 3b+%2\n" \
".previous\n" \
: : "i" (__LINE__), \
"i" (x), \
"i" (sizeof(struct bug_entry))); \
} while (0)
#else /* CONFIG_DEBUG_BUGVERBOSE */
#define __EMIT_BUG(x) do { \
asm volatile( \
"0: j 0b+2\n" \
"1:\n" \
".section __bug_table,\"a\"\n" \
"2:\t" S390_LONG "\t1b\n" \
" .short %0\n" \
" .org 2b+%1\n" \
".previous\n" \
: : "i" (x), \
"i" (sizeof(struct bug_entry))); \
} while (0)
#endif /* CONFIG_DEBUG_BUGVERBOSE */
#define BUG() __EMIT_BUG(0)
#define WARN_ON(x) ({ \
typeof(x) __ret_warn_on = (x); \
if (__builtin_constant_p(__ret_warn_on)) { \
if (__ret_warn_on) \
__EMIT_BUG(BUGFLAG_WARNING); \
} else { \
if (unlikely(__ret_warn_on)) \
__EMIT_BUG(BUGFLAG_WARNING); \
} \
unlikely(__ret_warn_on); \
})
#define HAVE_ARCH_BUG
#endif
#define HAVE_ARCH_WARN_ON
#endif /* CONFIG_BUG */
#include <asm-generic/bug.h>
#endif
#endif /* _ASM_S390_BUG_H */