1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
use crate::structures::gdt::SegmentSelector;
pub unsafe fn set_cs(sel: SegmentSelector) {
#[cfg(feature = "inline_asm")]
#[inline(always)]
unsafe fn inner(sel: SegmentSelector) {
asm!("pushq $0; \
leaq 1f(%rip), %rax; \
pushq %rax; \
lretq; \
1:" :: "ri" (u64::from(sel.0)) : "rax" "memory");
}
#[cfg(not(feature = "inline_asm"))]
#[inline(always)]
unsafe fn inner(sel: SegmentSelector) {
crate::asm::x86_64_asm_set_cs(u64::from(sel.0))
}
inner(sel)
}
#[inline]
pub unsafe fn load_ss(sel: SegmentSelector) {
#[cfg(feature = "inline_asm")]
asm!("movw $0, %ss " :: "r" (sel.0) : "memory");
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_load_ss(sel.0);
}
#[inline]
pub unsafe fn load_ds(sel: SegmentSelector) {
#[cfg(feature = "inline_asm")]
asm!("movw $0, %ds " :: "r" (sel.0) : "memory");
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_load_ds(sel.0);
}
#[inline]
pub unsafe fn load_es(sel: SegmentSelector) {
#[cfg(feature = "inline_asm")]
asm!("movw $0, %es " :: "r" (sel.0) : "memory");
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_load_es(sel.0);
}
#[inline]
pub unsafe fn load_fs(sel: SegmentSelector) {
#[cfg(feature = "inline_asm")]
asm!("movw $0, %fs " :: "r" (sel.0) : "memory");
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_load_fs(sel.0);
}
#[inline]
pub unsafe fn load_gs(sel: SegmentSelector) {
#[cfg(feature = "inline_asm")]
asm!("movw $0, %gs " :: "r" (sel.0) : "memory");
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_load_gs(sel.0);
}
#[inline]
pub unsafe fn swap_gs() {
#[cfg(feature = "inline_asm")]
asm!("swapgs" ::: "memory" : "volatile");
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_swapgs();
}
#[inline]
pub fn cs() -> SegmentSelector {
#[cfg(feature = "inline_asm")]
{
let segment: u16;
unsafe { asm!("mov %cs, $0" : "=r" (segment) ) };
SegmentSelector(segment)
}
#[cfg(not(feature = "inline_asm"))]
{
let segment: u16 = unsafe { crate::asm::x86_64_asm_get_cs() };
SegmentSelector(segment)
}
}