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