1#ifndef _ASM_X86_UNWIND_HINTS_H
 2#define _ASM_X86_UNWIND_HINTS_H
 3
 4#include <linux/objtool.h>
 5
 6#include "orc_types.h"
 7
 8#ifdef __ASSEMBLY__
 9
10.macro UNWIND_HINT_EMPTY
11	UNWIND_HINT type=UNWIND_HINT_TYPE_CALL end=1
12.endm
13
14.macro UNWIND_HINT_ENTRY
15	UNWIND_HINT type=UNWIND_HINT_TYPE_ENTRY end=1
16.endm
17
18.macro UNWIND_HINT_REGS base=%rsp offset=0 indirect=0 extra=1 partial=0
19	.if \base == %rsp
20		.if \indirect
21			.set sp_reg, ORC_REG_SP_INDIRECT
22		.else
23			.set sp_reg, ORC_REG_SP
24		.endif
25	.elseif \base == %rbp
26		.set sp_reg, ORC_REG_BP
27	.elseif \base == %rdi
28		.set sp_reg, ORC_REG_DI
29	.elseif \base == %rdx
30		.set sp_reg, ORC_REG_DX
31	.elseif \base == %r10
32		.set sp_reg, ORC_REG_R10
33	.else
34		.error "UNWIND_HINT_REGS: bad base register"
35	.endif
36
37	.set sp_offset, \offset
38
39	.if \partial
40		.set type, UNWIND_HINT_TYPE_REGS_PARTIAL
41	.elseif \extra == 0
42		.set type, UNWIND_HINT_TYPE_REGS_PARTIAL
43		.set sp_offset, \offset + (16*8)
44	.else
45		.set type, UNWIND_HINT_TYPE_REGS
46	.endif
47
48	UNWIND_HINT sp_reg=sp_reg sp_offset=sp_offset type=type
49.endm
50
51.macro UNWIND_HINT_IRET_REGS base=%rsp offset=0
52	UNWIND_HINT_REGS base=\base offset=\offset partial=1
53.endm
54
55.macro UNWIND_HINT_FUNC
56	UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=8 type=UNWIND_HINT_TYPE_FUNC
57.endm
58
59.macro UNWIND_HINT_SAVE
60	UNWIND_HINT type=UNWIND_HINT_TYPE_SAVE
61.endm
62
63.macro UNWIND_HINT_RESTORE
64	UNWIND_HINT type=UNWIND_HINT_TYPE_RESTORE
65.endm
66
67#else
68
69#define UNWIND_HINT_FUNC \
70	UNWIND_HINT(ORC_REG_SP, 8, UNWIND_HINT_TYPE_FUNC, 0)
71
72#endif /* __ASSEMBLY__ */
73
74#endif /* _ASM_X86_UNWIND_HINTS_H */