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