df5d1874ce
... plus additionally introduce {push,pop}f{l,q}_cfi. All in the
hope that the code becomes better readable this way (it gets
quite a bit smaller in any case).
Signed-off-by: Jan Beulich <jbeulich@novell.com>
Acked-by: Alexander van Heukelum <heukelum@fastmail.fm>
LKML-Reference: <4C7FBDA40200007800013FAF@vpn.id2.novell.com>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
144 lines
3.3 KiB
C
144 lines
3.3 KiB
C
#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
|
|
|
|
#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_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 */
|