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 #if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__) 38 /* 39 * Emit CFI data in .debug_frame sections, not .eh_frame sections. 40 * The latter we currently just discard since we don't do DWARF 41 * unwinding at runtime. So only the offline DWARF information is 42 * useful to anyone. Note we should not use this directive if this 43 * file is used in the vDSO assembly, or if vmlinux.lds.S gets 44 * changed so it doesn't discard .eh_frame. 45 */ 46 .cfi_sections .debug_frame 47 #endif 48 49 #else 50 51 /* 52 * Due to the structure of pre-exisiting code, don't use assembler line 53 * comment character # to ignore the arguments. Instead, use a dummy macro. 54 */ 55 .macro cfi_ignore a=0, b=0, c=0, d=0 56 .endm 57 58 #define CFI_STARTPROC cfi_ignore 59 #define CFI_ENDPROC cfi_ignore 60 #define CFI_DEF_CFA cfi_ignore 61 #define CFI_DEF_CFA_REGISTER cfi_ignore 62 #define CFI_DEF_CFA_OFFSET cfi_ignore 63 #define CFI_ADJUST_CFA_OFFSET cfi_ignore 64 #define CFI_OFFSET cfi_ignore 65 #define CFI_REL_OFFSET cfi_ignore 66 #define CFI_REGISTER cfi_ignore 67 #define CFI_RESTORE cfi_ignore 68 #define CFI_REMEMBER_STATE cfi_ignore 69 #define CFI_RESTORE_STATE cfi_ignore 70 #define CFI_UNDEFINED cfi_ignore 71 #define CFI_SIGNAL_FRAME cfi_ignore 72 73 #endif 74 75 /* 76 * An attempt to make CFI annotations more or less 77 * correct and shorter. It is implied that you know 78 * what you're doing if you use them. 79 */ 80 #ifdef __ASSEMBLY__ 81 #ifdef CONFIG_X86_64 82 .macro pushq_cfi reg 83 pushq \reg 84 CFI_ADJUST_CFA_OFFSET 8 85 .endm 86 87 .macro popq_cfi reg 88 popq \reg 89 CFI_ADJUST_CFA_OFFSET -8 90 .endm 91 92 .macro pushfq_cfi 93 pushfq 94 CFI_ADJUST_CFA_OFFSET 8 95 .endm 96 97 .macro popfq_cfi 98 popfq 99 CFI_ADJUST_CFA_OFFSET -8 100 .endm 101 102 .macro movq_cfi reg offset=0 103 movq %\reg, \offset(%rsp) 104 CFI_REL_OFFSET \reg, \offset 105 .endm 106 107 .macro movq_cfi_restore offset reg 108 movq \offset(%rsp), %\reg 109 CFI_RESTORE \reg 110 .endm 111 #else /*!CONFIG_X86_64*/ 112 .macro pushl_cfi reg 113 pushl \reg 114 CFI_ADJUST_CFA_OFFSET 4 115 .endm 116 117 .macro popl_cfi reg 118 popl \reg 119 CFI_ADJUST_CFA_OFFSET -4 120 .endm 121 122 .macro pushfl_cfi 123 pushfl 124 CFI_ADJUST_CFA_OFFSET 4 125 .endm 126 127 .macro popfl_cfi 128 popfl 129 CFI_ADJUST_CFA_OFFSET -4 130 .endm 131 132 .macro movl_cfi reg offset=0 133 movl %\reg, \offset(%esp) 134 CFI_REL_OFFSET \reg, \offset 135 .endm 136 137 .macro movl_cfi_restore offset reg 138 movl \offset(%esp), %\reg 139 CFI_RESTORE \reg 140 .endm 141 #endif /*!CONFIG_X86_64*/ 142 #endif /*__ASSEMBLY__*/ 143 144 #endif /* _ASM_X86_DWARF2_H */ 145