/* SPDX-License-Identifier: GPL-2.0 *//* * Copyright (C) 2020-2022 Loongson Technology Corporation Limited */#ifndef _ASM_STACKTRACE_H#define _ASM_STACKTRACE_H #include <asm/asm.h>#include <asm/ptrace.h>#include <asm/loongarch.h>#include <asm/unwind_hints.h>#include <linux/stringify.h> enum stack_type {	STACK_TYPE_UNKNOWN,	STACK_TYPE_IRQ,	STACK_TYPE_TASK,}; struct stack_info {	enum stack_type type;	unsigned long begin, end, next_sp;}; struct stack_frame {	unsigned long	fp;	unsigned long	ra;}; bool in_irq_stack(unsigned long stack, struct stack_info *info);bool in_task_stack(unsigned long stack, struct task_struct *task, struct stack_info *info);int get_stack_info(unsigned long stack, struct task_struct *task, struct stack_info *info); static __always_inline bool on_thread_stack(void){	return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));} #define STR_LONG_L    __stringify(LONG_L)#define STR_LONG_S    __stringify(LONG_S)#define STR_LONGSIZE  __stringify(LONGSIZE) #define STORE_ONE_REG(r) \    STR_LONG_S   " $r" __stringify(r)", %1, "STR_LONGSIZE"*"__stringify(r)"\n\t" #define CSRRD_ONE_REG(reg) \    __stringify(csrrd) " %0, "__stringify(reg)"\n\t" static __always_inline void prepare_frametrace(struct pt_regs *regs){	__asm__ __volatile__(		UNWIND_HINT_SAVE		/* Save $ra */		STORE_ONE_REG(1)		/* Use $ra to save PC */		"pcaddi	$ra, 0\n\t"		STR_LONG_S " $ra, %0\n\t"		/* Restore $ra */		STR_LONG_L " $ra, %1, "STR_LONGSIZE"\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)		UNWIND_HINT_RESTORE		: "=m" (regs->csr_era)		: "r" (regs->regs)		: "memory");	__asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_BADV) : "=r" (regs->csr_badvaddr));	__asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_CRMD) : "=r" (regs->csr_crmd));	__asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_PRMD) : "=r" (regs->csr_prmd));	__asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_EUEN) : "=r" (regs->csr_euen));	__asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_ECFG) : "=r" (regs->csr_ecfg));	__asm__ __volatile__(CSRRD_ONE_REG(LOONGARCH_CSR_ESTAT) : "=r" (regs->csr_estat));} #endif /* _ASM_STACKTRACE_H */