arch/arc/include/asm/stacktrace.h

   1 /* SPDX-License-Identifier: GPL-2.0-only */
   2 /*
   3  * Copyright (C) 2014-15 Synopsys, Inc. (www.synopsys.com)
   4  * Copyright (C) 2007-2010, 2011-2012 Synopsys, Inc. (www.synopsys.com)
   5  */
   6
   7 #ifndef __ASM_STACKTRACE_H
   8 #define __ASM_STACKTRACE_H
   9
  10 #include <linux/sched.h>
  11
  12 /**
  13  * arc_unwind_core - Unwind the kernel mode stack for an execution context
  14  * @tsk:                NULL for current task, specific task otherwise
  15  * @regs:               pt_regs used to seed the unwinder {SP, FP, BLINK, PC}
  16  *                      If NULL, use pt_regs of @tsk (if !NULL) otherwise
  17  *                      use the current values of {SP, FP, BLINK, PC}
  18  * @consumer_fn:        Callback invoked for each frame unwound
  19  *                      Returns 0 to continue unwinding, -1 to stop
  20  * @arg:                Arg to callback
  21  *
  22  * Returns the address of first function in stack
  23  *
  24  * Semantics:
  25  *  - synchronous unwinding (e.g. dump_stack): @tsk  NULL, @regs  NULL
  26  *  - Asynchronous unwinding of sleeping task: @tsk !NULL, @regs  NULL
  27  *  - Asynchronous unwinding of intr/excp etc: @tsk !NULL, @regs !NULL
  28  */
  29 notrace noinline unsigned int arc_unwind_core(
  30         struct task_struct *tsk, struct pt_regs *regs,
  31         int (*consumer_fn) (unsigned int, void *),
  32         void *arg);
  33
  34 #endif /* __ASM_STACKTRACE_H */