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