#ifndef _ASM_X86_DWARF2_H
#define _ASM_X86_DWARF2_H

#ifndef __ASSEMBLY__
#warning "asm/dwarf2.h should be only included in pure assembly files"
#endif

/*
* Macros for dwarf2 CFI unwind table entries.
* See "as.info" for details on these pseudo ops. Unfortunately
* they are only supported in very new binutils, so define them
* away for older version.
*/

#ifdef CONFIG_AS_CFI

#define CFI_STARTPROC .cfi_startproc
#define CFI_ENDPROC .cfi_endproc
#define CFI_DEF_CFA .cfi_def_cfa
#define CFI_DEF_CFA_REGISTER .cfi_def_cfa_register
#define CFI_DEF_CFA_OFFSET .cfi_def_cfa_offset
#define CFI_ADJUST_CFA_OFFSET .cfi_adjust_cfa_offset
#define CFI_OFFSET .cfi_offset
#define CFI_REL_OFFSET .cfi_rel_offset
#define CFI_REGISTER .cfi_register
#define CFI_RESTORE .cfi_restore
#define CFI_REMEMBER_STATE .cfi_remember_state
#define CFI_RESTORE_STATE .cfi_restore_state
#define CFI_UNDEFINED .cfi_undefined
#define CFI_ESCAPE .cfi_escape

#ifdef CONFIG_AS_CFI_SIGNAL_FRAME
#define CFI_SIGNAL_FRAME .cfi_signal_frame
#else
#define CFI_SIGNAL_FRAME
#endif

#if defined(CONFIG_AS_CFI_SECTIONS) && defined(__ASSEMBLY__)
/*
* Emit CFI data in .debug_frame sections, not .eh_frame sections.
* The latter we currently just discard since we don't do DWARF
* unwinding at runtime. So only the offline DWARF information is
* useful to anyone. Note we should not use this directive if this
* file is used in the vDSO assembly, or if vmlinux.lds.S gets
* changed so it doesn't discard .eh_frame.
*/
.cfi_sections .debug_frame
#endif

#else

/*
* Due to the structure of pre-exisiting code, don't use assembler line
* comment character # to ignore the arguments. Instead, use a dummy macro.
*/
.macro cfi_ignore a=0, b=0, c=0, d=0
.endm

#define CFI_STARTPROC cfi_ignore
#define CFI_ENDPROC cfi_ignore
#define CFI_DEF_CFA cfi_ignore
#define CFI_DEF_CFA_REGISTER cfi_ignore
#define CFI_DEF_CFA_OFFSET cfi_ignore
#define CFI_ADJUST_CFA_OFFSET cfi_ignore
#define CFI_OFFSET cfi_ignore
#define CFI_REL_OFFSET cfi_ignore
#define CFI_REGISTER cfi_ignore
#define CFI_RESTORE cfi_ignore
#define CFI_REMEMBER_STATE cfi_ignore
#define CFI_RESTORE_STATE cfi_ignore
#define CFI_UNDEFINED cfi_ignore
#define CFI_ESCAPE cfi_ignore
#define CFI_SIGNAL_FRAME cfi_ignore

#endif

/*
* An attempt to make CFI annotations more or less
* correct and shorter. It is implied that you know
* what you're doing if you use them.
*/
#ifdef __ASSEMBLY__
#ifdef CONFIG_X86_64
.macro pushq_cfi reg
pushq \reg
CFI_ADJUST_CFA_OFFSET 8
.endm

.macro popq_cfi reg
popq \reg
CFI_ADJUST_CFA_OFFSET -8
.endm

.macro pushfq_cfi
pushfq
CFI_ADJUST_CFA_OFFSET 8
.endm

.macro popfq_cfi
popfq
CFI_ADJUST_CFA_OFFSET -8
.endm

.macro movq_cfi reg offset=0
movq %\reg, \offset(%rsp)
CFI_REL_OFFSET \reg, \offset
.endm

.macro movq_cfi_restore offset reg
movq \offset(%rsp), %\reg
CFI_RESTORE \reg
.endm
#else /*!CONFIG_X86_64*/
.macro pushl_cfi reg
pushl \reg
CFI_ADJUST_CFA_OFFSET 4
.endm

.macro popl_cfi reg
popl \reg
CFI_ADJUST_CFA_OFFSET -4
.endm

.macro pushfl_cfi
pushfl
CFI_ADJUST_CFA_OFFSET 4
.endm

.macro popfl_cfi
popfl
CFI_ADJUST_CFA_OFFSET -4
.endm

.macro movl_cfi reg offset=0
movl %\reg, \offset(%esp)
CFI_REL_OFFSET \reg, \offset
.endm

.macro movl_cfi_restore offset reg
movl \offset(%esp), %\reg
CFI_RESTORE \reg
.endm
#endif /*!CONFIG_X86_64*/
#endif /*__ASSEMBLY__*/

#endif /* _ASM_X86_DWARF2_H */