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