From 384740dc49ea651ba350704d13ff6be9976e37fe Mon Sep 17 00:00:00 2001 From: Ralf Baechle Date: Tue, 16 Sep 2008 19:48:51 +0200 Subject: MIPS: Move headfiles to new location below arch/mips/include Signed-off-by: Ralf Baechle --- arch/mips/include/asm/stacktrace.h | 48 ++++++++++++++++++++++++++++++++++++++ 1 file changed, 48 insertions(+) create mode 100644 arch/mips/include/asm/stacktrace.h (limited to 'arch/mips/include/asm/stacktrace.h') 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 + +#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 */ -- cgit v1.2.3