Cregit: Linux 5.18: stacktrace.h

Contributors: 6
Author	Tokens	Token Proportion	Commits	Commit Proportion
Nikolay Borisov	54	28.88%	1	14.29%
Russell King	44	23.53%	1	14.29%
Masami Hiramatsu	35	18.72%	1	14.29%
Ard Biesheuvel	29	15.51%	2	28.57%
Catalin Marinas	24	12.83%	1	14.29%
Greg Kroah-Hartman	1	0.53%	1	14.29%
Total	187		7

/* SPDX-License-Identifier: GPL-2.0 */
#ifndef __ASM_STACKTRACE_H
#define __ASM_STACKTRACE_H

#include <asm/ptrace.h>
#include <linux/llist.h>

struct stackframe {
	/*
	 * FP member should hold R7 when CONFIG_THUMB2_KERNEL is enabled
	 * and R11 otherwise.
	 */
	unsigned long fp;
	unsigned long sp;
	unsigned long lr;
	unsigned long pc;

	/* address of the LR value on the stack */
	unsigned long *lr_addr;
#ifdef CONFIG_KRETPROBES
	struct llist_node *kr_cur;
	struct task_struct *tsk;
#endif
};

static __always_inline
void arm_get_current_stackframe(struct pt_regs *regs, struct stackframe *frame)
{
		frame->fp = frame_pointer(regs);
		frame->sp = regs->ARM_sp;
		frame->lr = regs->ARM_lr;
		frame->pc = regs->ARM_pc;
#ifdef CONFIG_KRETPROBES
		frame->kr_cur = NULL;
		frame->tsk = current;
#endif
}

extern int unwind_frame(struct stackframe *frame);
extern void walk_stackframe(struct stackframe *frame,
			    int (*fn)(struct stackframe *, void *), void *data);
extern void dump_mem(const char *lvl, const char *str, unsigned long bottom,
		     unsigned long top);

#endif	/* __ASM_STACKTRACE_H */