arch/x86/include/asm/dwarf2.h

   1 #ifndef _ASM_X86_DWARF2_H
   2 #define _ASM_X86_DWARF2_H
   3
   4 #ifndef __ASSEMBLY__
   5 #warning "asm/dwarf2.h should be only included in pure assembly files"
   6 #endif
   7
   8 /*
   9  * Macros for dwarf2 CFI unwind table entries.
  10  * See "as.info" for details on these pseudo ops. Unfortunately
  11  * they are only supported in very new binutils, so define them
  12  * away for older version.
  13  */
  14
  15 #ifdef CONFIG_AS_CFI
  16
  17 #define CFI_STARTPROC           .cfi_startproc
  18 #define CFI_ENDPROC             .cfi_endproc
  19 #define CFI_DEF_CFA             .cfi_def_cfa
  20 #define CFI_DEF_CFA_REGISTER    .cfi_def_cfa_register
  21 #define CFI_DEF_CFA_OFFSET      .cfi_def_cfa_offset
  22 #define CFI_ADJUST_CFA_OFFSET   .cfi_adjust_cfa_offset
  23 #define CFI_OFFSET              .cfi_offset
  24 #define CFI_REL_OFFSET          .cfi_rel_offset
  25 #define CFI_REGISTER            .cfi_register
  26 #define CFI_RESTORE             .cfi_restore
  27 #define CFI_REMEMBER_STATE      .cfi_remember_state
  28 #define CFI_RESTORE_STATE       .cfi_restore_state
  29 #define CFI_UNDEFINED           .cfi_undefined
  30
  31 #ifdef CONFIG_AS_CFI_SIGNAL_FRAME
  32 #define CFI_SIGNAL_FRAME        .cfi_signal_frame
  33 #else
  34 #define CFI_SIGNAL_FRAME
  35 #endif
  36
  37 #else
  38
  39 /*
  40  * Due to the structure of pre-exisiting code, don't use assembler line
  41  * comment character # to ignore the arguments. Instead, use a dummy macro.
  42  */
  43 .macro cfi_ignore a=0, b=0, c=0, d=0
  44 .endm
  45
  46 #define CFI_STARTPROC           cfi_ignore
  47 #define CFI_ENDPROC             cfi_ignore
  48 #define CFI_DEF_CFA             cfi_ignore
  49 #define CFI_DEF_CFA_REGISTER    cfi_ignore
  50 #define CFI_DEF_CFA_OFFSET      cfi_ignore
  51 #define CFI_ADJUST_CFA_OFFSET   cfi_ignore
  52 #define CFI_OFFSET              cfi_ignore
  53 #define CFI_REL_OFFSET          cfi_ignore
  54 #define CFI_REGISTER            cfi_ignore
  55 #define CFI_RESTORE             cfi_ignore
  56 #define CFI_REMEMBER_STATE      cfi_ignore
  57 #define CFI_RESTORE_STATE       cfi_ignore
  58 #define CFI_UNDEFINED           cfi_ignore
  59 #define CFI_SIGNAL_FRAME        cfi_ignore
  60
  61 #endif
  62
  63 /*
  64  * An attempt to make CFI annotations more or less
  65  * correct and shorter. It is implied that you know
  66  * what you're doing if you use them.
  67  */
  68 #ifdef __ASSEMBLY__
  69 #ifdef CONFIG_X86_64
  70         .macro pushq_cfi reg
  71         pushq \reg
  72         CFI_ADJUST_CFA_OFFSET 8
  73         .endm
  74
  75         .macro popq_cfi reg
  76         popq \reg
  77         CFI_ADJUST_CFA_OFFSET -8
  78         .endm
  79
  80         .macro movq_cfi reg offset=0
  81         movq %\reg, \offset(%rsp)
  82         CFI_REL_OFFSET \reg, \offset
  83         .endm
  84
  85         .macro movq_cfi_restore offset reg
  86         movq \offset(%rsp), %\reg
  87         CFI_RESTORE \reg
  88         .endm
  89 #else /*!CONFIG_X86_64*/
  90
  91         /* 32bit defenitions are missed yet */
  92
  93 #endif /*!CONFIG_X86_64*/
  94 #endif /*__ASSEMBLY__*/
  95
  96 #endif /* _ASM_X86_DWARF2_H */