Max Filippov | 3e4196a | 2013-04-15 09:20:48 +0400 | [diff] [blame] | 1 | /* |
| 2 | * arch/xtensa/include/asm/stacktrace.h |
| 3 | * |
| 4 | * This file is subject to the terms and conditions of the GNU General Public |
| 5 | * License. See the file "COPYING" in the main directory of this archive |
| 6 | * for more details. |
| 7 | * |
| 8 | * Copyright (C) 2001 - 2013 Tensilica Inc. |
| 9 | */ |
| 10 | #ifndef _XTENSA_STACKTRACE_H |
| 11 | #define _XTENSA_STACKTRACE_H |
| 12 | |
| 13 | #include <linux/sched.h> |
| 14 | |
| 15 | struct stackframe { |
| 16 | unsigned long pc; |
| 17 | unsigned long sp; |
| 18 | }; |
| 19 | |
| 20 | static __always_inline unsigned long *stack_pointer(struct task_struct *task) |
| 21 | { |
| 22 | unsigned long *sp; |
| 23 | |
| 24 | if (!task || task == current) |
| 25 | __asm__ __volatile__ ("mov %0, a1\n" : "=a"(sp)); |
| 26 | else |
| 27 | sp = (unsigned long *)task->thread.sp; |
| 28 | |
| 29 | return sp; |
| 30 | } |
| 31 | |
| 32 | void walk_stackframe(unsigned long *sp, |
| 33 | int (*fn)(struct stackframe *frame, void *data), |
| 34 | void *data); |
| 35 | |
| 36 | #endif /* _XTENSA_STACKTRACE_H */ |