arch/x86/include/asm/frame.h

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