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 .macro pushl_cfi reg 91 pushl \reg 92 CFI_ADJUST_CFA_OFFSET 4 93 .endm 94 95 .macro popl_cfi reg 96 popl \reg 97 CFI_ADJUST_CFA_OFFSET -4 98 .endm 99 100 .macro movl_cfi reg offset=0 101 movl %\reg, \offset(%esp) 102 CFI_REL_OFFSET \reg, \offset 103 .endm 104 105 .macro movl_cfi_restore offset reg 106 movl \offset(%esp), %\reg 107 CFI_RESTORE \reg 108 .endm 109 #endif /*!CONFIG_X86_64*/ 110 #endif /*__ASSEMBLY__*/ 111 112 #endif /* _ASM_X86_DWARF2_H */ 113