/* SPDX-License-Identifier: GPL-2.0-only */
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/*
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* Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
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* Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
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*/
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#ifndef __ASM_STACKTRACE_H
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#define __ASM_STACKTRACE_H
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#include <linux/sched.h>
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/**
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* arc_unwind_core - Unwind the kernel mode stack for an execution context
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* @tsk: NULL for current task, specific task otherwise
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* @regs: pt_regs used to seed the unwinder {SP, FP, BLINK, PC}
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* If NULL, use pt_regs of @tsk (if !NULL) otherwise
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* use the current values of {SP, FP, BLINK, PC}
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* @consumer_fn: Callback invoked for each frame unwound
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* Returns 0 to continue unwinding, -1 to stop
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* @arg: Arg to callback
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*
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* Returns the address of first function in stack
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*
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* Semantics:
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* - synchronous unwinding (e.g. dump_stack): @tsk NULL, @regs NULL
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* - Asynchronous unwinding of sleeping task: @tsk !NULL, @regs NULL
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* - Asynchronous unwinding of intr/excp etc: @tsk !NULL, @regs !NULL
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*/
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notrace noinline unsigned int arc_unwind_core(
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struct task_struct *tsk, struct pt_regs *regs,
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int (*consumer_fn) (unsigned int, void *),
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void *arg);
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#endif /* __ASM_STACKTRACE_H */
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