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
12 #include <asm/memory.h>
13 #include <asm/pointer_auth.h>
14 #include <asm/ptrace.h>
15 #include <asm/sdei.h>
16
17 #include <asm/stacktrace/common.h>
18
19 extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
20 const char *loglvl);
21
22 DECLARE_PER_CPU(unsigned long *, irq_stack_ptr);
23
on_irq_stack(unsigned long sp,unsigned long size,struct stack_info * info)24 static inline bool on_irq_stack(unsigned long sp, unsigned long size,
25 struct stack_info *info)
26 {
27 unsigned long low = (unsigned long)raw_cpu_read(irq_stack_ptr);
28 unsigned long high = low + IRQ_STACK_SIZE;
29
30 return on_stack(sp, size, low, high, STACK_TYPE_IRQ, info);
31 }
32
on_task_stack(const struct task_struct * tsk,unsigned long sp,unsigned long size,struct stack_info * info)33 static inline bool on_task_stack(const struct task_struct *tsk,
34 unsigned long sp, unsigned long size,
35 struct stack_info *info)
36 {
37 unsigned long low = (unsigned long)task_stack_page(tsk);
38 unsigned long high = low + THREAD_SIZE;
39
40 return on_stack(sp, size, low, high, STACK_TYPE_TASK, info);
41 }
42
43 #ifdef CONFIG_VMAP_STACK
44 DECLARE_PER_CPU(unsigned long [OVERFLOW_STACK_SIZE/sizeof(long)], overflow_stack);
45
on_overflow_stack(unsigned long sp,unsigned long size,struct stack_info * info)46 static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
47 struct stack_info *info)
48 {
49 unsigned long low = (unsigned long)raw_cpu_ptr(overflow_stack);
50 unsigned long high = low + OVERFLOW_STACK_SIZE;
51
52 return on_stack(sp, size, low, high, STACK_TYPE_OVERFLOW, info);
53 }
54 #else
on_overflow_stack(unsigned long sp,unsigned long size,struct stack_info * info)55 static inline bool on_overflow_stack(unsigned long sp, unsigned long size,
56 struct stack_info *info) { return false; }
57 #endif
58
59 #endif /* __ASM_STACKTRACE_H */
60