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
use crate::structures::gdt::SegmentSelector;
use crate::VirtAddr;
pub use crate::structures::DescriptorTablePointer;
#[inline]
pub unsafe fn lgdt(gdt: &DescriptorTablePointer) {
#[cfg(feature = "inline_asm")]
asm!("lgdt [{}]", in(reg) gdt, options(readonly, nostack, preserves_flags));
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_lgdt(gdt as *const _);
}
#[inline]
pub unsafe fn lidt(idt: &DescriptorTablePointer) {
#[cfg(feature = "inline_asm")]
asm!("lidt [{}]", in(reg) idt, options(readonly, nostack, preserves_flags));
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_lidt(idt as *const _);
}
#[inline]
pub fn sidt() -> DescriptorTablePointer {
let mut idt: DescriptorTablePointer = DescriptorTablePointer {
limit: 0,
base: VirtAddr::new(0),
};
unsafe {
#[cfg(feature = "inline_asm")]
asm!("sidt [{}]", in(reg) &mut idt, options(nostack, preserves_flags));
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_sidt(&mut idt as *mut _);
}
idt
}
#[inline]
pub unsafe fn load_tss(sel: SegmentSelector) {
#[cfg(feature = "inline_asm")]
asm!("ltr {0:x}", in(reg) sel.0, options(nomem, nostack, preserves_flags));
#[cfg(not(feature = "inline_asm"))]
crate::asm::x86_64_asm_ltr(sel.0);
}