diff options
| author | Paul Mundt <lethal@linux-sh.org> | 2007-03-08 19:41:21 +0900 |
|---|---|---|
| committer | Paul Mundt <lethal@hera.kernel.org> | 2007-05-07 02:10:53 +0000 |
| commit | fa69151173b1fc6fa3ced0edd5c2ea83b5d32bc1 (patch) | |
| tree | e7af97ccddc06d54dd6d6982a64cbf4982693379 /include/asm-sh | |
| parent | 45ed285b54930767937deb0eaf718b1d08c3c475 (diff) | |
sh: generic BUG() support.
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>
Diffstat (limited to 'include/asm-sh')
| -rw-r--r-- | include/asm-sh/bug.h | 92 |
1 files changed, 61 insertions, 31 deletions
diff --git a/include/asm-sh/bug.h b/include/asm-sh/bug.h index 2f89dd06d0cd..794c36daf06d 100644 --- a/include/asm-sh/bug.h +++ b/include/asm-sh/bug.h @@ -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 */ |