1*49232773SQing Zhang /* SPDX-License-Identifier: GPL-2.0 */ 2*49232773SQing Zhang /* 3*49232773SQing Zhang * Most of this ideas comes from x86. 4*49232773SQing Zhang * 5*49232773SQing Zhang * Copyright (C) 2022 Loongson Technology Corporation Limited 6*49232773SQing Zhang */ 7*49232773SQing Zhang #ifndef _ASM_UNWIND_H 8*49232773SQing Zhang #define _ASM_UNWIND_H 9*49232773SQing Zhang 10*49232773SQing Zhang #include <linux/sched.h> 11*49232773SQing Zhang 12*49232773SQing Zhang #include <asm/stacktrace.h> 13*49232773SQing Zhang 14*49232773SQing Zhang struct unwind_state { 15*49232773SQing Zhang struct stack_info stack_info; 16*49232773SQing Zhang struct task_struct *task; 17*49232773SQing Zhang bool first, error; 18*49232773SQing Zhang unsigned long sp, pc; 19*49232773SQing Zhang }; 20*49232773SQing Zhang 21*49232773SQing Zhang void unwind_start(struct unwind_state *state, 22*49232773SQing Zhang struct task_struct *task, struct pt_regs *regs); 23*49232773SQing Zhang bool unwind_next_frame(struct unwind_state *state); 24*49232773SQing Zhang unsigned long unwind_get_return_address(struct unwind_state *state); 25*49232773SQing Zhang 26*49232773SQing Zhang static inline bool unwind_done(struct unwind_state *state) 27*49232773SQing Zhang { 28*49232773SQing Zhang return state->stack_info.type == STACK_TYPE_UNKNOWN; 29*49232773SQing Zhang } 30*49232773SQing Zhang 31*49232773SQing Zhang static inline bool unwind_error(struct unwind_state *state) 32*49232773SQing Zhang { 33*49232773SQing Zhang return state->error; 34*49232773SQing Zhang } 35*49232773SQing Zhang 36*49232773SQing Zhang #endif /* _ASM_UNWIND_H */ 37