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 movq_cfi reg offset=0 93 movq %\reg, \offset(%rsp) 94 CFI_REL_OFFSET \reg, \offset 95 .endm 96 97 .macro movq_cfi_restore offset reg 98 movq \offset(%rsp), %\reg 99 CFI_RESTORE \reg 100 .endm 101#else /*!CONFIG_X86_64*/ 102 .macro pushl_cfi reg 103 pushl \reg 104 CFI_ADJUST_CFA_OFFSET 4 105 .endm 106 107 .macro popl_cfi reg 108 popl \reg 109 CFI_ADJUST_CFA_OFFSET -4 110 .endm 111 112 .macro movl_cfi reg offset=0 113 movl %\reg, \offset(%esp) 114 CFI_REL_OFFSET \reg, \offset 115 .endm 116 117 .macro movl_cfi_restore offset reg 118 movl \offset(%esp), %\reg 119 CFI_RESTORE \reg 120 .endm 121#endif /*!CONFIG_X86_64*/ 122#endif /*__ASSEMBLY__*/ 123 124#endif /* _ASM_X86_DWARF2_H */ 125