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3a51d50f VG |
1 | /* |
2 | * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com) | |
3 | * Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com) | |
4 | * | |
5 | * This program is free software; you can redistribute it and/or modify | |
6 | * it under the terms of the GNU General Public License version 2 as | |
7 | * published by the Free Software Foundation. | |
8 | */ | |
9 | ||
10 | #ifndef __ASM_STACKTRACE_H | |
11 | #define __ASM_STACKTRACE_H | |
12 | ||
13 | #include <linux/sched.h> | |
14 | ||
15 | /** | |
16 | * arc_unwind_core - Unwind the kernel mode stack for an execution context | |
17 | * @tsk: NULL for current task, specific task otherwise | |
18 | * @regs: pt_regs used to seed the unwinder {SP, FP, BLINK, PC} | |
19 | * If NULL, use pt_regs of @tsk (if !NULL) otherwise | |
20 | * use the current values of {SP, FP, BLINK, PC} | |
21 | * @consumer_fn: Callback invoked for each frame unwound | |
22 | * Returns 0 to continue unwinding, -1 to stop | |
23 | * @arg: Arg to callback | |
24 | * | |
25 | * Returns the address of first function in stack | |
26 | * | |
27 | * Semantics: | |
28 | * - synchronous unwinding (e.g. dump_stack): @tsk NULL, @regs NULL | |
29 | * - Asynchronous unwinding of sleeping task: @tsk !NULL, @regs NULL | |
30 | * - Asynchronous unwinding of intr/excp etc: @tsk !NULL, @regs !NULL | |
31 | */ | |
32 | notrace noinline unsigned int arc_unwind_core( | |
33 | struct task_struct *tsk, struct pt_regs *regs, | |
34 | int (*consumer_fn) (unsigned int, void *), | |
35 | void *arg); | |
36 | ||
37 | #endif /* __ASM_STACKTRACE_H */ |