Merge remote-tracking branch 'torvalds/master' into perf/core
[linux-2.6-block.git] / arch / loongarch / include / asm / unwind.h
1 /* SPDX-License-Identifier: GPL-2.0 */
2 /*
3  * Most of this ideas comes from x86.
4  *
5  * Copyright (C) 2022 Loongson Technology Corporation Limited
6  */
7 #ifndef _ASM_UNWIND_H
8 #define _ASM_UNWIND_H
9
10 #include <linux/sched.h>
11
12 #include <asm/stacktrace.h>
13
14 enum unwinder_type {
15         UNWINDER_GUESS,
16         UNWINDER_PROLOGUE,
17 };
18
19 struct unwind_state {
20         char type; /* UNWINDER_XXX */
21         struct stack_info stack_info;
22         struct task_struct *task;
23         bool first, error, is_ftrace;
24         int graph_idx;
25         unsigned long sp, pc, ra;
26 };
27
28 void unwind_start(struct unwind_state *state,
29                   struct task_struct *task, struct pt_regs *regs);
30 bool unwind_next_frame(struct unwind_state *state);
31 unsigned long unwind_get_return_address(struct unwind_state *state);
32
33 static inline bool unwind_done(struct unwind_state *state)
34 {
35         return state->stack_info.type == STACK_TYPE_UNKNOWN;
36 }
37
38 static inline bool unwind_error(struct unwind_state *state)
39 {
40         return state->error;
41 }
42
43 #endif /* _ASM_UNWIND_H */