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//! Helpers to program the task state segment.
//! See Intel 3a, Chapter 7
use core::mem::size_of;
#[derive(Copy, Clone, Debug)]
#[repr(C, packed)]
pub struct TaskStateSegment {
pub link: u16,
reserved0: u16,
pub esp0: u32,
pub ss0: u16,
reserved1: u16,
pub esp1: u32,
pub ss1: u16,
reserved2: u16,
pub esp2: u32,
pub ss2: u16,
reserved3: u16,
pub cr3: u32,
pub eip: u32,
pub eflags: u32,
pub eax: u32,
pub ecx: u32,
pub edx: u32,
pub ebx: u32,
pub esp: u32,
pub ebp: u32,
pub esi: u32,
pub edi: u32,
pub es: u16,
reserved4: u16,
pub cs: u16,
reserved5: u16,
pub ss: u16,
reserved6: u16,
pub ds: u16,
reserved7: u16,
pub fs: u16,
reserved8: u16,
pub gs: u16,
reserved9: u16,
pub ldtr: u16,
reserved10: u32,
pub iobp_offset: u16
}
impl TaskStateSegment {
pub fn new() -> TaskStateSegment {
TaskStateSegment {
link: 0,
reserved0: 0,
esp0: 0,
ss0: 0,
reserved1: 0,
esp1: 0,
ss1: 0,
reserved2: 0,
esp2: 0,
ss2: 0,
reserved3: 0,
cr3: 0,
eip: 0,
eflags: 0,
eax: 0,
ecx: 0,
edx: 0,
ebx: 0,
esp: 0,
ebp: 0,
esi: 0,
edi: 0,
es: 0,
reserved4: 0,
cs: 0,
reserved5: 0,
ss: 0,
reserved6: 0,
ds: 0,
reserved7: 0,
fs: 0,
reserved8: 0,
gs: 0,
reserved9: 0,
ldtr: 0,
reserved10: 0,
iobp_offset: size_of::<TaskStateSegment>() as u16
}
}
}
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