Linux kernel mirror (for testing)
git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
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linux
1/* SPDX-License-Identifier: GPL-2.0 */
2#ifndef __ASM_STACKTRACE_H
3#define __ASM_STACKTRACE_H
4
5#include <linux/llist.h>
6#include <asm/ptrace.h>
7#include <asm/sections.h>
8
9struct stackframe {
10 /*
11 * FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled
12 * and R11 otherwise.
13 */
14 unsigned long fp;
15 unsigned long sp;
16 unsigned long lr;
17 unsigned long pc;
18
19 /* address of the LR value on the stack */
20 unsigned long *lr_addr;
21#ifdef CONFIG_KRETPROBES
22 struct llist_node *kr_cur;
23 struct task_struct *tsk;
24#endif
25#ifdef CONFIG_UNWINDER_FRAME_POINTER
26 bool ex_frame;
27#endif
28};
29
30static inline bool on_thread_stack(void)
31{
32 unsigned long delta = current_stack_pointer ^ (unsigned long)current->stack;
33
34 return delta < THREAD_SIZE;
35}
36
37static __always_inline
38void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
39{
40 frame->fp = frame_pointer(regs);
41 frame->sp = regs->ARM_sp;
42 frame->lr = regs->ARM_lr;
43 frame->pc = regs->ARM_pc;
44#ifdef CONFIG_KRETPROBES
45 frame->kr_cur = NULL;
46 frame->tsk = current;
47#endif
48#ifdef CONFIG_UNWINDER_FRAME_POINTER
49 frame->ex_frame = in_entry_text(frame->pc);
50#endif
51}
52
53extern int unwind_frame(struct stackframe *frame);
54extern void walk_stackframe(struct stackframe *frame,
55 bool (*fn)(void *, unsigned long), void *data);
56extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
57 unsigned long top);
58extern void dump_backtrace(struct pt_regs *regs, struct task_struct *tsk,
59 const char *loglvl);
60
61#endif /* __ASM_STACKTRACE_H */