1*4882a593Smuzhiyun /*
2*4882a593Smuzhiyun * arch/xtensa/include/asm/stacktrace.h
3*4882a593Smuzhiyun *
4*4882a593Smuzhiyun * This file is subject to the terms and conditions of the GNU General Public
5*4882a593Smuzhiyun * License. See the file "COPYING" in the main directory of this archive
6*4882a593Smuzhiyun * for more details.
7*4882a593Smuzhiyun *
8*4882a593Smuzhiyun * Copyright (C) 2001 - 2013 Tensilica Inc.
9*4882a593Smuzhiyun */
10*4882a593Smuzhiyun #ifndef _XTENSA_STACKTRACE_H
11*4882a593Smuzhiyun #define _XTENSA_STACKTRACE_H
12*4882a593Smuzhiyun
13*4882a593Smuzhiyun #include <linux/sched.h>
14*4882a593Smuzhiyun
15*4882a593Smuzhiyun struct stackframe {
16*4882a593Smuzhiyun unsigned long pc;
17*4882a593Smuzhiyun unsigned long sp;
18*4882a593Smuzhiyun };
19*4882a593Smuzhiyun
stack_pointer(struct task_struct * task)20*4882a593Smuzhiyun static __always_inline unsigned long *stack_pointer(struct task_struct *task)
21*4882a593Smuzhiyun {
22*4882a593Smuzhiyun unsigned long *sp;
23*4882a593Smuzhiyun
24*4882a593Smuzhiyun if (!task || task == current)
25*4882a593Smuzhiyun __asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp));
26*4882a593Smuzhiyun else
27*4882a593Smuzhiyun sp = (unsigned long *)task->thread.sp;
28*4882a593Smuzhiyun
29*4882a593Smuzhiyun return sp;
30*4882a593Smuzhiyun }
31*4882a593Smuzhiyun
32*4882a593Smuzhiyun void walk_stackframe(unsigned long *sp,
33*4882a593Smuzhiyun int (*fn)(struct stackframe *frame, void *data),
34*4882a593Smuzhiyun void *data);
35*4882a593Smuzhiyun
36*4882a593Smuzhiyun void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth,
37*4882a593Smuzhiyun int (*kfn)(struct stackframe *frame, void *data),
38*4882a593Smuzhiyun int (*ufn)(struct stackframe *frame, void *data),
39*4882a593Smuzhiyun void *data);
40*4882a593Smuzhiyun void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,
41*4882a593Smuzhiyun int (*ufn)(struct stackframe *frame, void *data),
42*4882a593Smuzhiyun void *data);
43*4882a593Smuzhiyun
44*4882a593Smuzhiyun #endif /* _XTENSA_STACKTRACE_H */
45