#ifndef _ASM_STACKTRACE_H#define _ASM_STACKTRACE_H #include <asm/ptrace.h> #ifdef CONFIG_KALLSYMSextern 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#define unwind_stack(task, sp, pc, ra)	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 */