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 #ifndef BUILD_VDSO 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 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. 46 */ 47 .cfi_sections .debug_frame 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 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 #endif /* _ASM_X86_DWARF2_H */ 85