arch/arc/include/asm/stacktrace.h

   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 */