projects / mirror_ubuntu-bionic-kernel.git / blame
| Commit | Line | Data |
|---|---|---|
| 7b956f03 AL |
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__) | |
| f24f9108 | 39 | #ifndef BUILD_VDSO |
| 7b956f03 AL |
40 | /* |
| 41 | * Emit CFI data in .debug_frame sections, not .eh_frame sections. | |
| 42 | * The latter we currently just discard since we don't do DWARF | |
| 43 | * unwinding at runtime. So only the offline DWARF information is | |
| f24f9108 AL |
44 | * useful to anyone. Note we should not use this directive if |
| 45 | * vmlinux.lds.S gets changed so it doesn't discard .eh_frame. | |
| 7b956f03 AL |
46 | */ |
| 47 | .cfi_sections .debug_frame | |
| f24f9108 AL |
48 | #else |
| 49 | /* | |
| 50 | * For the vDSO, emit both runtime unwind information and debug | |
| 51 | * symbols for the .dbg file. | |
| 52 | */ | |
| 53 | .cfi_sections .eh_frame, .debug_frame | |
| 54 | #endif | |
| 7b956f03 AL |
55 | #endif |
| 56 | ||
| 57 | #else | |
| 58 | ||
| 59 | /* | |
| 60 | * Due to the structure of pre-exisiting code, don't use assembler line | |
| 61 | * comment character # to ignore the arguments. Instead, use a dummy macro. | |
| 62 | */ | |
| 63 | .macro cfi_ignore a=0, b=0, c=0, d=0 | |
| 64 | .endm | |
| 65 | ||
| 66 | #define CFI_STARTPROC cfi_ignore | |
| 67 | #define CFI_ENDPROC cfi_ignore | |
| 68 | #define CFI_DEF_CFA cfi_ignore | |
| 69 | #define CFI_DEF_CFA_REGISTER cfi_ignore | |
| 70 | #define CFI_DEF_CFA_OFFSET cfi_ignore | |
| 71 | #define CFI_ADJUST_CFA_OFFSET cfi_ignore | |
| 72 | #define CFI_OFFSET cfi_ignore | |
| 73 | #define CFI_REL_OFFSET cfi_ignore | |
| 74 | #define CFI_REGISTER cfi_ignore | |
| 75 | #define CFI_RESTORE cfi_ignore | |
| 76 | #define CFI_REMEMBER_STATE cfi_ignore | |
| 77 | #define CFI_RESTORE_STATE cfi_ignore | |
| 78 | #define CFI_UNDEFINED cfi_ignore | |
| 79 | #define CFI_ESCAPE cfi_ignore | |
| 80 | #define CFI_SIGNAL_FRAME cfi_ignore | |
| 81 | ||
| 82 | #endif | |
| 83 | ||
| 84 | /* | |
| 85 | * An attempt to make CFI annotations more or less | |
| 86 | * correct and shorter. It is implied that you know | |
| 87 | * what you're doing if you use them. | |
| 88 | */ | |
| 89 | #ifdef __ASSEMBLY__ | |
| 90 | #ifdef CONFIG_X86_64 | |
| 91 | .macro pushq_cfi reg | |
| 92 | pushq \reg | |
| 93 | CFI_ADJUST_CFA_OFFSET 8 | |
| 94 | .endm | |
| 95 | ||
| 96 | .macro pushq_cfi_reg reg | |
| 97 | pushq %\reg | |
| 98 | CFI_ADJUST_CFA_OFFSET 8 | |
| 99 | CFI_REL_OFFSET \reg, 0 | |
| 100 | .endm | |
| 101 | ||
| 102 | .macro popq_cfi reg | |
| 103 | popq \reg | |
| 104 | CFI_ADJUST_CFA_OFFSET -8 | |
| 105 | .endm | |
| 106 | ||
| 107 | .macro popq_cfi_reg reg | |
| 108 | popq %\reg | |
| 109 | CFI_ADJUST_CFA_OFFSET -8 | |
| 110 | CFI_RESTORE \reg | |
| 111 | .endm | |
| 112 | ||
| 113 | .macro pushfq_cfi | |
| 114 | pushfq | |
| 115 | CFI_ADJUST_CFA_OFFSET 8 | |
| 116 | .endm | |
| 117 | ||
| 118 | .macro popfq_cfi | |
| 119 | popfq | |
| 120 | CFI_ADJUST_CFA_OFFSET -8 | |
| 121 | .endm | |
| 122 | ||
| 123 | .macro movq_cfi reg offset=0 | |
| 124 | movq %\reg, \offset(%rsp) | |
| 125 | CFI_REL_OFFSET \reg, \offset | |
| 126 | .endm | |
| 127 | ||
| 128 | .macro movq_cfi_restore offset reg | |
| 129 | movq \offset(%rsp), %\reg | |
| 130 | CFI_RESTORE \reg | |
| 131 | .endm | |
| 132 | #else /*!CONFIG_X86_64*/ | |
| 133 | .macro pushl_cfi reg | |
| 134 | pushl \reg | |
| 135 | CFI_ADJUST_CFA_OFFSET 4 | |
| 136 | .endm | |
| 137 | ||
| 138 | .macro pushl_cfi_reg reg | |
| 139 | pushl %\reg | |
| 140 | CFI_ADJUST_CFA_OFFSET 4 | |
| 141 | CFI_REL_OFFSET \reg, 0 | |
| 142 | .endm | |
| 143 | ||
| 144 | .macro popl_cfi reg | |
| 145 | popl \reg | |
| 146 | CFI_ADJUST_CFA_OFFSET -4 | |
| 147 | .endm | |
| 148 | ||
| 149 | .macro popl_cfi_reg reg | |
| 150 | popl %\reg | |
| 151 | CFI_ADJUST_CFA_OFFSET -4 | |
| 152 | CFI_RESTORE \reg | |
| 153 | .endm | |
| 154 | ||
| 155 | .macro pushfl_cfi | |
| 156 | pushfl | |
| 157 | CFI_ADJUST_CFA_OFFSET 4 | |
| 158 | .endm | |
| 159 | ||
| 160 | .macro popfl_cfi | |
| 161 | popfl | |
| 162 | CFI_ADJUST_CFA_OFFSET -4 | |
| 163 | .endm | |
| 164 | ||
| 165 | .macro movl_cfi reg offset=0 | |
| 166 | movl %\reg, \offset(%esp) | |
| 167 | CFI_REL_OFFSET \reg, \offset | |
| 168 | .endm | |
| 169 | ||
| 170 | .macro movl_cfi_restore offset reg | |
| 171 | movl \offset(%esp), %\reg | |
| 172 | CFI_RESTORE \reg | |
| 173 | .endm | |
| 174 | #endif /*!CONFIG_X86_64*/ | |
| 175 | #endif /*__ASSEMBLY__*/ | |
| 176 | ||
| 177 | #endif /* _ASM_X86_DWARF2_H */ |