arch/x86/include/asm/frame.h

   1 /* SPDX-License-Identifier: GPL-2.0 */
   2 #ifndef _ASM_X86_FRAME_H
   3 #define _ASM_X86_FRAME_H
   4
   5 #include <asm/asm.h>
   6
   7 /*
   8  * These are stack frame creation macros.  They should be used by every
   9  * callable non-leaf asm function to make kernel stack traces more reliable.
  10  */
  11
  12 #ifdef CONFIG_FRAME_POINTER
  13
  14 #ifdef __ASSEMBLY__
  15
  16 .macro FRAME_BEGIN
  17         push %_ASM_BP
  18         _ASM_MOV %_ASM_SP, %_ASM_BP
  19 .endm
  20
  21 .macro FRAME_END
  22         pop %_ASM_BP
  23 .endm
  24
  25 #else /* !__ASSEMBLY__ */
  26
  27 #define FRAME_BEGIN                             \
  28         "push %" _ASM_BP "\n"                   \
  29         _ASM_MOV "%" _ASM_SP ", %" _ASM_BP "\n"
  30
  31 #define FRAME_END "pop %" _ASM_BP "\n"
  32
  33 #endif /* __ASSEMBLY__ */
  34
  35 #define FRAME_OFFSET __ASM_SEL(4, 8)
  36
  37 #else /* !CONFIG_FRAME_POINTER */
  38
  39 #define FRAME_BEGIN
  40 #define FRAME_END
  41 #define FRAME_OFFSET 0
  42
  43 #endif /* CONFIG_FRAME_POINTER */
  44
  45 #endif /* _ASM_X86_FRAME_H */