1 /* SPDX-License-Identifier: GPL-2.0 */ 2 #ifndef _ASM_X86_DWARF2_H 3 #define _ASM_X86_DWARF2_H 4 5 #ifndef __ASSEMBLY__ 6 #warning "asm/dwarf2.h should be only included in pure assembly files" 7 #endif 8 9 /* 10 * Macros for dwarf2 CFI unwind table entries. 11 * See "as.info" for details on these pseudo ops. Unfortunately 12 * they are only supported in very new binutils, so define them 13 * away for older version. 14 */ 15 16 #ifdef CONFIG_AS_CFI 17 18 #define CFI_STARTPROC .cfi_startproc 19 #define CFI_ENDPROC .cfi_endproc 20 #define CFI_DEF_CFA .cfi_def_cfa 21 #define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register 22 #define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset 23 #define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset 24 #define CFI_OFFSET .cfi_offset 25 #define CFI_REL_OFFSET .cfi_rel_offset 26 #define CFI_REGISTER .cfi_register 27 #define CFI_RESTORE .cfi_restore 28 #define CFI_REMEMBER_STATE .cfi_remember_state 29 #define CFI_RESTORE_STATE .cfi_restore_state 30 #define CFI_UNDEFINED .cfi_undefined 31 #define CFI_ESCAPE .cfi_escape 32 33 #ifdef CONFIG_AS_CFI_SIGNAL_FRAME 34 #define CFI_SIGNAL_FRAME .cfi_signal_frame 35 #else 36 #define CFI_SIGNAL_FRAME 37 #endif 38 39 #if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__) 40 #ifndef BUILD_VDSO 41 /* 42 * Emit CFI data in .debug_frame sections, not .eh_frame sections. 43 * The latter we currently just discard since we don't do DWARF 44 * unwinding at runtime. So only the offline DWARF information is 45 * useful to anyone. Note we should not use this directive if 46 * vmlinux.lds.S gets changed so it doesn't discard .eh_frame. 47 */ 48 .cfi_sections .debug_frame 49 #else 50 /* 51 * For the vDSO, emit both runtime unwind information and debug 52 * symbols for the .dbg file. 53 */ 54 .cfi_sections .eh_frame, .debug_frame 55 #endif 56 #endif 57 58 #else 59 60 /* 61 * Due to the structure of pre-exisiting code, don't use assembler line 62 * comment character # to ignore the arguments. Instead, use a dummy macro. 63 */ 64 .macro cfi_ignore a=0, b=0, c=0, d=0 65 .endm 66 67 #define CFI_STARTPROC cfi_ignore 68 #define CFI_ENDPROC cfi_ignore 69 #define CFI_DEF_CFA cfi_ignore 70 #define CFI_DEF_CFA_REGISTER cfi_ignore 71 #define CFI_DEF_CFA_OFFSET cfi_ignore 72 #define CFI_ADJUST_CFA_OFFSET cfi_ignore 73 #define CFI_OFFSET cfi_ignore 74 #define CFI_REL_OFFSET cfi_ignore 75 #define CFI_REGISTER cfi_ignore 76 #define CFI_RESTORE cfi_ignore 77 #define CFI_REMEMBER_STATE cfi_ignore 78 #define CFI_RESTORE_STATE cfi_ignore 79 #define CFI_UNDEFINED cfi_ignore 80 #define CFI_ESCAPE cfi_ignore 81 #define CFI_SIGNAL_FRAME cfi_ignore 82 83 #endif 84 85 #endif /* _ASM_X86_DWARF2_H */ 86