1/* SPDX-License-Identifier: GPL-2.0 */
 2
 3#ifndef _ASM_RISCV_STACKTRACE_H
 4#define _ASM_RISCV_STACKTRACE_H
 5
 6#include <linux/sched.h>
 7#include <asm/ptrace.h>
 8
 9struct stackframe {
10	unsigned long fp;
11	unsigned long ra;
12};
13
14extern void notrace walk_stackframe(struct task_struct *task, struct pt_regs *regs,
15				    bool (*fn)(void *, unsigned long), void *arg);
16extern void dump_backtrace(struct pt_regs *regs, struct task_struct *task,
17			   const char *loglvl);
18
19static inline bool on_thread_stack(void)
20{
21	return !(((unsigned long)(current->stack) ^ current_stack_pointer) & ~(THREAD_SIZE - 1));
22}
23
24
25#ifdef CONFIG_VMAP_STACK
26DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack);
27#endif /* CONFIG_VMAP_STACK */
28
29#endif /* _ASM_RISCV_STACKTRACE_H */