#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 #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 */