LXR linux/include/linux/frame.h

   1/* SPDX-License-Identifier: GPL-2.0 */
   2#ifndef _LINUX_FRAME_H
   3#define _LINUX_FRAME_H
   4
   5#ifdef CONFIG_STACK_VALIDATION
   6/*
   7 * This macro marks the given function's stack frame as "non-standard", which
   8 * tells objtool to ignore the function when doing stack metadata validation.
   9 * It should only be used in special cases where you're 100% sure it won't
  10 * affect the reliability of frame pointers and kernel stack traces.
  11 *
  12 * For more information, see tools/objtool/Documentation/stack-validation.txt.
  13 */
  14#define STACK_FRAME_NON_STANDARD(func) \
  15        static void __used __section(.discard.func_stack_frame_non_standard) \
  16                *__func_stack_frame_non_standard_##func = func
  17
  18#else /* !CONFIG_STACK_VALIDATION */
  19
  20#define STACK_FRAME_NON_STANDARD(func)
  21
  22#endif /* CONFIG_STACK_VALIDATION */
  23
  24#endif /* _LINUX_FRAME_H */
  25