/* SPDX-License-Identifier: GPL-2.0 */#ifndef _ASM_STACKTRACE_H#define _ASM_STACKTRACE_H #include <asm/ptrace.h>#include <asm/asm.h>#include <linux/stringify.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);extern unsigned long unwind_stack_by_address(unsigned long stack_page,					     unsigned long *sp,					     unsigned long pc,					     unsigned long *ra);#else#define raw_show_trace 1static inline unsigned long unwind_stack(struct task_struct *task,	unsigned long *sp, unsigned long pc, unsigned long *ra){	return 0;}#endif #define STR_PTR_LA    __stringify(PTR_LA)#define STR_LONG_S    __stringify(LONG_S)#define STR_LONG_L    __stringify(LONG_L)#define STR_LONGSIZE  __stringify(LONGSIZE) #define STORE_ONE_REG(r) \    STR_LONG_S   " $" __stringify(r)",("STR_LONGSIZE"*"__stringify(r)")(%1)\n\t" 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"		/* Store $1 so we can use it */		STR_LONG_S " $1,"STR_LONGSIZE"(%1)\n\t"		/* Store the PC */		"1: " STR_PTR_LA " $1, 1b\n\t"		STR_LONG_S " $1,%0\n\t"		STORE_ONE_REG(2)		STORE_ONE_REG(3)		STORE_ONE_REG(4)		STORE_ONE_REG(5)		STORE_ONE_REG(6)		STORE_ONE_REG(7)		STORE_ONE_REG(8)		STORE_ONE_REG(9)		STORE_ONE_REG(10)		STORE_ONE_REG(11)		STORE_ONE_REG(12)		STORE_ONE_REG(13)		STORE_ONE_REG(14)		STORE_ONE_REG(15)		STORE_ONE_REG(16)		STORE_ONE_REG(17)		STORE_ONE_REG(18)		STORE_ONE_REG(19)		STORE_ONE_REG(20)		STORE_ONE_REG(21)		STORE_ONE_REG(22)		STORE_ONE_REG(23)		STORE_ONE_REG(24)		STORE_ONE_REG(25)		STORE_ONE_REG(26)		STORE_ONE_REG(27)		STORE_ONE_REG(28)		STORE_ONE_REG(29)		STORE_ONE_REG(30)		STORE_ONE_REG(31)		/* Restore $1 */		STR_LONG_L " $1,"STR_LONGSIZE"(%1)\n\t"		".set pop\n\t"		: "=m" (regs->cp0_epc)		: "r" (regs->regs)		: "memory");} #endif /* _ASM_STACKTRACE_H */