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 */