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_END_OF_STACK
11	UNWIND_HINT type=UNWIND_HINT_TYPE_END_OF_STACK
12.endm
13
14.macro UNWIND_HINT_UNDEFINED
15	UNWIND_HINT type=UNWIND_HINT_TYPE_UNDEFINED
16.endm
17
18.macro UNWIND_HINT_ENTRY
19	VALIDATE_UNRET_BEGIN
20	UNWIND_HINT_END_OF_STACK
21.endm
22
23.macro UNWIND_HINT_REGS base=%rsp offset=0 indirect=0 extra=1 partial=0 signal=1
24	.if \base == %rsp
25		.if \indirect
26			.set sp_reg, ORC_REG_SP_INDIRECT
27		.else
28			.set sp_reg, ORC_REG_SP
29		.endif
30	.elseif \base == %rbp
31		.set sp_reg, ORC_REG_BP
32	.elseif \base == %rdi
33		.set sp_reg, ORC_REG_DI
34	.elseif \base == %rdx
35		.set sp_reg, ORC_REG_DX
36	.elseif \base == %r10
37		.set sp_reg, ORC_REG_R10
38	.else
39		.error "UNWIND_HINT_REGS: bad base register"
40	.endif
41
42	.set sp_offset, \offset
43
44	.if \partial
45		.set type, UNWIND_HINT_TYPE_REGS_PARTIAL
46	.elseif \extra == 0
47		.set type, UNWIND_HINT_TYPE_REGS_PARTIAL
48		.set sp_offset, \offset + (16*8)
49	.else
50		.set type, UNWIND_HINT_TYPE_REGS
51	.endif
52
53	UNWIND_HINT sp_reg=sp_reg sp_offset=sp_offset type=type signal=\signal
54.endm
55
56.macro UNWIND_HINT_IRET_REGS base=%rsp offset=0 signal=1
57	UNWIND_HINT_REGS base=\base offset=\offset partial=1 signal=\signal
58.endm
59
60.macro UNWIND_HINT_IRET_ENTRY base=%rsp offset=0 signal=1
61	VALIDATE_UNRET_BEGIN
62	UNWIND_HINT_IRET_REGS base=\base offset=\offset signal=\signal
63.endm
64
65.macro UNWIND_HINT_FUNC
66	UNWIND_HINT sp_reg=ORC_REG_SP sp_offset=8 type=UNWIND_HINT_TYPE_FUNC
67.endm
68
69.macro UNWIND_HINT_SAVE
70	UNWIND_HINT type=UNWIND_HINT_TYPE_SAVE
71.endm
72
73.macro UNWIND_HINT_RESTORE
74	UNWIND_HINT type=UNWIND_HINT_TYPE_RESTORE
75.endm
76
77#else
78
79#define UNWIND_HINT_UNDEFINED \
80	UNWIND_HINT(UNWIND_HINT_TYPE_UNDEFINED, 0, 0, 0)
81
82#define UNWIND_HINT_FUNC \
83	UNWIND_HINT(UNWIND_HINT_TYPE_FUNC, ORC_REG_SP, 8, 0)
84
85#define UNWIND_HINT_SAVE \
86	UNWIND_HINT(UNWIND_HINT_TYPE_SAVE, 0, 0, 0)
87
88#define UNWIND_HINT_RESTORE \
89	UNWIND_HINT(UNWIND_HINT_TYPE_RESTORE, 0, 0, 0)
90
91#endif /* __ASSEMBLY__ */
92
93#endif /* _ASM_X86_UNWIND_HINTS_H */
94