summaryrefslogtreecommitdiff
path: root/arch/mips/include/asm/stacktrace.h
diff options
context:
space:
mode:
authorRalf Baechle <ralf@linux-mips.org>2008-09-16 21:48:51 +0400
committerRalf Baechle <ralf@linux-mips.org>2008-10-11 19:18:52 +0400
commit384740dc49ea651ba350704d13ff6be9976e37fe (patch)
treea6e80cad287ccae7a86d81bfa692fc96889c88ed /arch/mips/include/asm/stacktrace.h
parente8c7c482347574ecdd45c43e32c332d5fc2ece61 (diff)
downloadlinux-384740dc49ea651ba350704d13ff6be9976e37fe.tar.xz
MIPS: Move headfiles to new location below arch/mips/include
Signed-off-by: Ralf Baechle <ralf@linux-mips.org>
Diffstat (limited to 'arch/mips/include/asm/stacktrace.h')
-rw-r--r--arch/mips/include/asm/stacktrace.h48
1 files changed, 48 insertions, 0 deletions
diff --git a/arch/mips/include/asm/stacktrace.h b/arch/mips/include/asm/stacktrace.h
new file mode 100644
index 000000000000..0bf82818aa53
--- /dev/null
+++ b/arch/mips/include/asm/stacktrace.h
@@ -0,0 +1,48 @@
+#ifndef _ASM_STACKTRACE_H
+#define _ASM_STACKTRACE_H
+
+#include <asm/ptrace.h>
+
+#ifdef CONFIG_KALLSYMS
+extern int raw_show_trace;
+extern unsigned long unwind_stack(struct task_struct *task, unsigned long *sp,
+ unsigned long pc, unsigned long *ra);
+#else
+#define raw_show_trace 1
+static inline unsigned long unwind_stack(struct task_struct *task,
+ unsigned long *sp, unsigned long pc, unsigned long *ra)
+{
+ return 0;
+}
+#endif
+
+static __always_inline void prepare_frametrace(struct pt_regs *regs)
+{
+#ifndef CONFIG_KALLSYMS
+ /*
+ * Remove any garbage that may be in regs (specially func
+ * addresses) to avoid show_raw_backtrace() to report them
+ */
+ memset(regs, 0, sizeof(*regs));
+#endif
+ __asm__ __volatile__(
+ ".set push\n\t"
+ ".set noat\n\t"
+#ifdef CONFIG_64BIT
+ "1: dla $1, 1b\n\t"
+ "sd $1, %0\n\t"
+ "sd $29, %1\n\t"
+ "sd $31, %2\n\t"
+#else
+ "1: la $1, 1b\n\t"
+ "sw $1, %0\n\t"
+ "sw $29, %1\n\t"
+ "sw $31, %2\n\t"
+#endif
+ ".set pop\n\t"
+ : "=m" (regs->cp0_epc),
+ "=m" (regs->regs[29]), "=m" (regs->regs[31])
+ : : "memory");
+}
+
+#endif /* _ASM_STACKTRACE_H */