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 #define CFI_ESCAPE .cfi_escape 31 32 #ifdef CONFIG_AS_CFI_SIGNAL_FRAME 33 #define CFI_SIGNAL_FRAME .cfi_signal_frame 34 #else 35 #define CFI_SIGNAL_FRAME 36 #endif 37 38 #if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__) 39 /* 40 * Emit CFI data in .debug_frame sections, not .eh_frame sections. 41 * The latter we currently just discard since we don't do DWARF 42 * unwinding at runtime. So only the offline DWARF information is 43 * useful to anyone. Note we should not use this directive if this 44 * file is used in the vDSO assembly, or if vmlinux.lds.S gets 45 * changed so it doesn't discard .eh_frame. 46 */ 47 .cfi_sections .debug_frame 48 #endif 49 50 #else 51 52 /* 53 * Due to the structure of pre-exisiting code, don't use assembler line 54 * comment character # to ignore the arguments. Instead, use a dummy macro. 55 */ 56 .macro cfi_ignore a=0, b=0, c=0, d=0 57 .endm 58 59 #define CFI_STARTPROC cfi_ignore 60 #define CFI_ENDPROC cfi_ignore 61 #define CFI_DEF_CFA cfi_ignore 62 #define CFI_DEF_CFA_REGISTER cfi_ignore 63 #define CFI_DEF_CFA_OFFSET cfi_ignore 64 #define CFI_ADJUST_CFA_OFFSET cfi_ignore 65 #define CFI_OFFSET cfi_ignore 66 #define CFI_REL_OFFSET cfi_ignore 67 #define CFI_REGISTER cfi_ignore 68 #define CFI_RESTORE cfi_ignore 69 #define CFI_REMEMBER_STATE cfi_ignore 70 #define CFI_RESTORE_STATE cfi_ignore 71 #define CFI_UNDEFINED cfi_ignore 72 #define CFI_ESCAPE cfi_ignore 73 #define CFI_SIGNAL_FRAME cfi_ignore 74 75 #endif 76 77 /* 78 * An attempt to make CFI annotations more or less 79 * correct and shorter. It is implied that you know 80 * what you're doing if you use them. 81 */ 82 #ifdef __ASSEMBLY__ 83 #ifdef CONFIG_X86_64 84 .macro pushq_cfi reg 85 pushq \reg 86 CFI_ADJUST_CFA_OFFSET 8 87 .endm 88 89 .macro popq_cfi reg 90 popq \reg 91 CFI_ADJUST_CFA_OFFSET -8 92 .endm 93 94 .macro pushfq_cfi 95 pushfq 96 CFI_ADJUST_CFA_OFFSET 8 97 .endm 98 99 .macro popfq_cfi 100 popfq 101 CFI_ADJUST_CFA_OFFSET -8 102 .endm 103 104 .macro movq_cfi reg offset=0 105 movq %\reg, \offset(%rsp) 106 CFI_REL_OFFSET \reg, \offset 107 .endm 108 109 .macro movq_cfi_restore offset reg 110 movq \offset(%rsp), %\reg 111 CFI_RESTORE \reg 112 .endm 113 #else /*!CONFIG_X86_64*/ 114 .macro pushl_cfi reg 115 pushl \reg 116 CFI_ADJUST_CFA_OFFSET 4 117 .endm 118 119 .macro popl_cfi reg 120 popl \reg 121 CFI_ADJUST_CFA_OFFSET -4 122 .endm 123 124 .macro pushfl_cfi 125 pushfl 126 CFI_ADJUST_CFA_OFFSET 4 127 .endm 128 129 .macro popfl_cfi 130 popfl 131 CFI_ADJUST_CFA_OFFSET -4 132 .endm 133 134 .macro movl_cfi reg offset=0 135 movl %\reg, \offset(%esp) 136 CFI_REL_OFFSET \reg, \offset 137 .endm 138 139 .macro movl_cfi_restore offset reg 140 movl \offset(%esp), %\reg 141 CFI_RESTORE \reg 142 .endm 143 #endif /*!CONFIG_X86_64*/ 144 #endif /*__ASSEMBLY__*/ 145 146 #endif /* _ASM_X86_DWARF2_H */ 147