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authorHaavard Skinnemoen <hskinnemoen@atmel.com>2007-03-13 17:59:11 +0100
committerHaavard Skinnemoen <hskinnemoen@atmel.com>2007-04-27 13:44:13 +0200
commit623b0355d5b1f9c6d05005b649a2f3a7b9fd7816 (patch)
tree43ef35d4f6e83a49c1fb72df4b538271b650c054 /include/asm-avr32
parent3b328c98093702c584692bffabd440800b383d73 (diff)
downloadop-kernel-dev-623b0355d5b1f9c6d05005b649a2f3a7b9fd7816.zip
op-kernel-dev-623b0355d5b1f9c6d05005b649a2f3a7b9fd7816.tar.gz
[AVR32] Clean up exception handling code
* Use generic BUG() handling * Remove some useless debug statements * Use a common function _exception() to send signals or oops when an exception can't be handled. This makes sure init doesn't enter an infinite exception loop as well. Borrowed from powerpc. * Add some basic exception tracing support to the page fault code. * Rework dump_stack(), show_regs() and friends and move everything into process.c * Print information about configuration options and chip type when oopsing Signed-off-by: Haavard Skinnemoen <hskinnemoen@atmel.com>
Diffstat (limited to 'include/asm-avr32')
-rw-r--r--include/asm-avr32/bug.h50
-rw-r--r--include/asm-avr32/processor.h6
-rw-r--r--include/asm-avr32/system.h13
3 files changed, 45 insertions, 24 deletions
diff --git a/include/asm-avr32/bug.h b/include/asm-avr32/bug.h
index 521766b..afdcd79 100644
--- a/include/asm-avr32/bug.h
+++ b/include/asm-avr32/bug.h
@@ -18,27 +18,53 @@
#ifdef CONFIG_DEBUG_BUGVERBOSE
-#define BUG() \
- do { \
- asm volatile(".hword %0\n\t" \
- ".hword %1\n\t" \
- ".long %2" \
- : \
- : "n"(AVR32_BUG_OPCODE), \
- "i"(__LINE__), "X"(__FILE__)); \
- } while (0)
+#define _BUG_OR_WARN(flags) \
+ asm volatile( \
+ "1: .hword %0\n" \
+ " .section __bug_table,\"a\",@progbits\n" \
+ "2: .long 1b\n" \
+ " .long %1\n" \
+ " .short %2\n" \
+ " .short %3\n" \
+ " .org 2b + %4\n" \
+ " .previous" \
+ : \
+ : "i"(AVR32_BUG_OPCODE), "i"(__FILE__), \
+ "i"(__LINE__), "i"(flags), \
+ "i"(sizeof(struct bug_entry)))
#else
+#define _BUG_OR_WARN(flags) \
+ asm volatile( \
+ "1: .hword %0\n" \
+ " .section __bug_table,\"a\",@progbits\n" \
+ "2: .long 1b\n" \
+ " .short %1\n" \
+ " .org 2b + %2\n" \
+ " .previous" \
+ : \
+ : "i"(AVR32_BUG_OPCODE), "i"(flags), \
+ "i"(sizeof(struct bug_entry)))
+
+#endif /* CONFIG_DEBUG_BUGVERBOSE */
+
#define BUG() \
do { \
- asm volatile(".hword %0\n\t" \
- : : "n"(AVR32_BUG_OPCODE)); \
+ _BUG_OR_WARN(0); \
+ for (;;); \
} while (0)
-#endif /* CONFIG_DEBUG_BUGVERBOSE */
+#define WARN_ON(condition) \
+ ({ \
+ typeof(condition) __ret_warn_on = (condition); \
+ if (unlikely(__ret_warn_on)) \
+ _BUG_OR_WARN(BUGFLAG_WARNING); \
+ unlikely(__ret_warn_on); \
+ })
#define HAVE_ARCH_BUG
+#define HAVE_ARCH_WARN_ON
#endif /* CONFIG_BUG */
diff --git a/include/asm-avr32/processor.h b/include/asm-avr32/processor.h
index cbb89cc..6a64833 100644
--- a/include/asm-avr32/processor.h
+++ b/include/asm-avr32/processor.h
@@ -134,10 +134,10 @@ extern int kernel_thread(int (*fn)(void *), void *arg, unsigned long flags);
#define thread_saved_pc(tsk) ((tsk)->thread.cpu_context.pc)
struct pt_regs;
-void show_trace(struct task_struct *task, unsigned long *stack,
- struct pt_regs *regs);
-
extern unsigned long get_wchan(struct task_struct *p);
+extern void show_regs_log_lvl(struct pt_regs *regs, const char *log_lvl);
+extern void show_stack_log_lvl(struct task_struct *tsk, unsigned long sp,
+ struct pt_regs *regs, const char *log_lvl);
#define KSTK_EIP(tsk) ((tsk)->thread.cpu_context.pc)
#define KSTK_ESP(tsk) ((tsk)->thread.cpu_context.ksp)
diff --git a/include/asm-avr32/system.h b/include/asm-avr32/system.h
index ac596058..a8236ba 100644
--- a/include/asm-avr32/system.h
+++ b/include/asm-avr32/system.h
@@ -9,6 +9,7 @@
#define __ASM_AVR32_SYSTEM_H
#include <linux/compiler.h>
+#include <linux/linkage.h>
#include <linux/types.h>
#include <asm/ptrace.h>
@@ -140,15 +141,9 @@ static inline unsigned long __cmpxchg(volatile void *ptr, unsigned long old,
sizeof(*(ptr))))
struct pt_regs;
-extern void __die(const char *, struct pt_regs *, unsigned long,
- const char *, const char *, unsigned long);
-extern void __die_if_kernel(const char *, struct pt_regs *, unsigned long,
- const char *, const char *, unsigned long);
-
-#define die(msg, regs, err) \
- __die(msg, regs, err, __FILE__ ":", __FUNCTION__, __LINE__)
-#define die_if_kernel(msg, regs, err) \
- __die_if_kernel(msg, regs, err, __FILE__ ":", __FUNCTION__, __LINE__)
+void NORET_TYPE die(const char *str, struct pt_regs *regs, long err);
+void _exception(long signr, struct pt_regs *regs, int code,
+ unsigned long addr);
#define arch_align_stack(x) (x)
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