13e4196a5SMax Filippov /*
23e4196a5SMax Filippov * arch/xtensa/include/asm/stacktrace.h
33e4196a5SMax Filippov *
43e4196a5SMax Filippov * This file is subject to the terms and conditions of the GNU General Public
53e4196a5SMax Filippov * License. See the file "COPYING" in the main directory of this archive
63e4196a5SMax Filippov * for more details.
73e4196a5SMax Filippov *
83e4196a5SMax Filippov * Copyright (C) 2001 - 2013 Tensilica Inc.
93e4196a5SMax Filippov */
103e4196a5SMax Filippov #ifndef _XTENSA_STACKTRACE_H
113e4196a5SMax Filippov #define _XTENSA_STACKTRACE_H
123e4196a5SMax Filippov
133e4196a5SMax Filippov #include <linux/sched.h>
143e4196a5SMax Filippov
153e4196a5SMax Filippov struct stackframe {
163e4196a5SMax Filippov unsigned long pc;
173e4196a5SMax Filippov unsigned long sp;
183e4196a5SMax Filippov };
193e4196a5SMax Filippov
stack_pointer(struct task_struct * task)203e4196a5SMax Filippov static __always_inline unsigned long *stack_pointer(struct task_struct *task)
213e4196a5SMax Filippov {
22*92652cf9SKees Cook unsigned long sp;
233e4196a5SMax Filippov
243e4196a5SMax Filippov if (!task || task == current)
25*92652cf9SKees Cook sp = current_stack_pointer;
263e4196a5SMax Filippov else
27*92652cf9SKees Cook sp = task->thread.sp;
283e4196a5SMax Filippov
29*92652cf9SKees Cook return (unsigned long *)sp;
303e4196a5SMax Filippov }
313e4196a5SMax Filippov
323e4196a5SMax Filippov void walk_stackframe(unsigned long *sp,
333e4196a5SMax Filippov int (*fn)(struct stackframe *frame, void *data),
343e4196a5SMax Filippov void *data);
353e4196a5SMax Filippov
365fdf377dSMax Filippov void xtensa_backtrace_kernel(struct pt_regs *regs, unsigned int depth,
375fdf377dSMax Filippov int (*kfn)(struct stackframe *frame, void *data),
385fdf377dSMax Filippov int (*ufn)(struct stackframe *frame, void *data),
395fdf377dSMax Filippov void *data);
405fdf377dSMax Filippov void xtensa_backtrace_user(struct pt_regs *regs, unsigned int depth,
415fdf377dSMax Filippov int (*ufn)(struct stackframe *frame, void *data),
425fdf377dSMax Filippov void *data);
435fdf377dSMax Filippov
443e4196a5SMax Filippov #endif /* _XTENSA_STACKTRACE_H */
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