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