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sh: generic BUG() support.

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Wire up GENERIC_BUG for SH. This moves off of the special bug
frame and on to the generic struct bug_entry. Roughly the same
semantics are retained, and we can kill off some of the verbose
BUG() reporting code.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2007-03-08 19:41:21 +09:00
committed by Paul Mundt
parent 45ed285b54
commit fa69151173
4 changed files with 95 additions and 102 deletions
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92
include/asm-sh/bug.h
View File

@@ -2,50 +2,80 @@
#define __ASM_SH_BUG_H
#ifdef CONFIG_BUG
struct bug_frame {
unsigned short opcode;
unsigned short line;
const char *file;
const char *func;
};
struct pt_regs;
extern void handle_BUG(struct pt_regs *);
#define HAVE_ARCH_BUG
#define HAVE_ARCH_WARN_ON
#define TRAPA_BUG_OPCODE 0xc33e /* trapa #0x3e */
/**
* _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__ ( \
".align 2\n\t" \
".short %O0\n\t" \
".short %O1\n\t" \
".long %O2\n\t" \
".long %O3\n\t" \
: \
: "n" (TRAPA_BUG_OPCODE), \
"i" (__LINE__), "X" (__FILE__), \
"X" (__FUNCTION__)); \
"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)
#else
#define BUG() \
do { \
__asm__ __volatile__ ( \
".align 2\n\t" \
".short %O0\n\t" \
: \
: "n" (TRAPA_BUG_OPCODE)); \
#define __WARN() \
do { \
__asm__ __volatile__ ( \
"1:\t.short %O0\n" \
_EMIT_BUG_ENTRY \
: \
: "n" (TRAPA_BUG_OPCODE), \
"i" (__FILE__), \
"i" (__LINE__), \
"i" (BUGFLAG_WARNING), \
"i" (sizeof(struct bug_entry))); \
} while (0)
#endif /* CONFIG_DEBUG_BUGVERBOSE */
#define WARN_ON(x) ({ \
typeof(x) __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 HAVE_ARCH_BUG
struct pt_regs;
/* arch/sh/kernel/traps.c */
void handle_BUG(struct pt_regs *);
#endif /* CONFIG_BUG */