Linux kernel mirror (for testing)
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1/* SPDX-License-Identifier: GPL-2.0-only */
2/*
3 * Copyright (C) 2012 ARM Ltd.
4 */
5#ifndef __ASM_STACKTRACE_H
6#define __ASM_STACKTRACE_H
7
8#include <linux/percpu.h>
9#include <linux/sched.h>
10#include <linux/sched/task_stack.h>
11#include <linux/llist.h>
12
13#include <asm/memory.h>
14#include <asm/pointer_auth.h>
15#include <asm/ptrace.h>
16#include <asm/sdei.h>
17
18#include <asm/stacktrace/common.h>
19
20extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
21 const char *loglvl);
22
23DECLARE_PER_CPU(unsigned long *, irq_stack_ptr);
24
25static inline bool on_irq_stack(unsigned long sp, unsigned long size,
26 struct stack_info *info)
27{
28 unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr);
29 unsigned long high = low + IRQ_STACK_SIZE;
30
31 return on_stack(sp, size, low, high, STACK_TYPE_IRQ, info);
32}
33
34static inline bool on_task_stack(const struct task_struct *tsk,
35 unsigned long sp, unsigned long size,
36 struct stack_info *info)
37{
38 unsigned long low = (unsigned long)task_stack_page(tsk);
39 unsigned long high = low + THREAD_SIZE;
40
41 return on_stack(sp, size, low, high, STACK_TYPE_TASK, info);
42}
43
44#ifdef CONFIG_VMAP_STACK
45DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack);
46
47static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
48 struct stack_info *info)
49{
50 unsigned long low = (unsigned long)raw_cpu_ptr(overflow_stack);
51 unsigned long high = low + OVERFLOW_STACK_SIZE;
52
53 return on_stack(sp, size, low, high, STACK_TYPE_OVERFLOW, info);
54}
55#else
56static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
57 struct stack_info *info) { return false; }
58#endif
59
60#endif /* __ASM_STACKTRACE_H */