forked from Minki/linux
b2be05273a
WARN() is used in some places to report firmware or hardware bugs that are then worked-around. These bugs do not affect the stability of the kernel and should not set the flag for TAINT_WARN. To allow for this, add WARN_TAINT() and WARN_TAINT_ONCE() macros that take a taint number as argument. Architectures that implement warnings using trap instructions instead of calls to warn_slowpath_*() now implement __WARN_TAINT(taint) instead of __WARN(). Signed-off-by: Ben Hutchings <ben@decadent.org.uk> Acked-by: Helge Deller <deller@gmx.de> Tested-by: Paul Mundt <lethal@linux-sh.org> Signed-off-by: David Woodhouse <David.Woodhouse@intel.com>
111 lines
2.4 KiB
C
111 lines
2.4 KiB
C
#ifndef __ASM_SH_BUG_H
|
|
#define __ASM_SH_BUG_H
|
|
|
|
#define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */
|
|
#define BUGFLAG_UNWINDER (1 << 1)
|
|
|
|
#ifdef CONFIG_GENERIC_BUG
|
|
#define HAVE_ARCH_BUG
|
|
#define HAVE_ARCH_WARN_ON
|
|
|
|
/**
|
|
* _EMIT_BUG_ENTRY
|
|
* %1 - __FILE__
|
|
* %2 - __LINE__
|
|
* %3 - trap type
|
|
* %4 - sizeof(struct bug_entry)
|
|
*
|
|
* The trapa opcode itself sits in %0.
|
|
* The %O notation is used to avoid # generation.
|
|
*
|
|
* The offending file and line are encoded in the __bug_table section.
|
|
*/
|
|
#ifdef CONFIG_DEBUG_BUGVERBOSE
|
|
#define _EMIT_BUG_ENTRY \
|
|
"\t.pushsection __bug_table,\"a\"\n" \
|
|
"2:\t.long 1b, %O1\n" \
|
|
"\t.short %O2, %O3\n" \
|
|
"\t.org 2b+%O4\n" \
|
|
"\t.popsection\n"
|
|
#else
|
|
#define _EMIT_BUG_ENTRY \
|
|
"\t.pushsection __bug_table,\"a\"\n" \
|
|
"2:\t.long 1b\n" \
|
|
"\t.short %O3\n" \
|
|
"\t.org 2b+%O4\n" \
|
|
"\t.popsection\n"
|
|
#endif
|
|
|
|
#define BUG() \
|
|
do { \
|
|
__asm__ __volatile__ ( \
|
|
"1:\t.short %O0\n" \
|
|
_EMIT_BUG_ENTRY \
|
|
: \
|
|
: "n" (TRAPA_BUG_OPCODE), \
|
|
"i" (__FILE__), \
|
|
"i" (__LINE__), "i" (0), \
|
|
"i" (sizeof(struct bug_entry))); \
|
|
} while (0)
|
|
|
|
#define __WARN_TAINT(taint) \
|
|
do { \
|
|
__asm__ __volatile__ ( \
|
|
"1:\t.short %O0\n" \
|
|
_EMIT_BUG_ENTRY \
|
|
: \
|
|
: "n" (TRAPA_BUG_OPCODE), \
|
|
"i" (__FILE__), \
|
|
"i" (__LINE__), \
|
|
"i" (BUGFLAG_TAINT(taint)), \
|
|
"i" (sizeof(struct bug_entry))); \
|
|
} while (0)
|
|
|
|
#define WARN_ON(x) ({ \
|
|
int __ret_warn_on = !!(x); \
|
|
if (__builtin_constant_p(__ret_warn_on)) { \
|
|
if (__ret_warn_on) \
|
|
__WARN(); \
|
|
} else { \
|
|
if (unlikely(__ret_warn_on)) \
|
|
__WARN(); \
|
|
} \
|
|
unlikely(__ret_warn_on); \
|
|
})
|
|
|
|
#define UNWINDER_BUG() \
|
|
do { \
|
|
__asm__ __volatile__ ( \
|
|
"1:\t.short %O0\n" \
|
|
_EMIT_BUG_ENTRY \
|
|
: \
|
|
: "n" (TRAPA_BUG_OPCODE), \
|
|
"i" (__FILE__), \
|
|
"i" (__LINE__), \
|
|
"i" (BUGFLAG_UNWINDER), \
|
|
"i" (sizeof(struct bug_entry))); \
|
|
} while (0)
|
|
|
|
#define UNWINDER_BUG_ON(x) ({ \
|
|
int __ret_unwinder_on = !!(x); \
|
|
if (__builtin_constant_p(__ret_unwinder_on)) { \
|
|
if (__ret_unwinder_on) \
|
|
UNWINDER_BUG(); \
|
|
} else { \
|
|
if (unlikely(__ret_unwinder_on)) \
|
|
UNWINDER_BUG(); \
|
|
} \
|
|
unlikely(__ret_unwinder_on); \
|
|
})
|
|
|
|
#else
|
|
|
|
#define UNWINDER_BUG BUG
|
|
#define UNWINDER_BUG_ON BUG_ON
|
|
|
|
#endif /* CONFIG_GENERIC_BUG */
|
|
|
|
#include <asm-generic/bug.h>
|
|
|
|
#endif /* __ASM_SH_BUG_H */
|