GDT data segment

This commit is contained in:
mii443
2025-08-02 22:01:42 +09:00
parent 64b80783fd
commit 68443aa743

View File

@ -1,7 +1,7 @@
use lazy_static::lazy_static;
use x86_64::{
instructions::tables::load_tss,
registers::segmentation::{Segment, CS},
registers::segmentation::{Segment, CS, DS, ES, FS, GS, SS},
structures::{
gdt::{Descriptor, GlobalDescriptorTable, SegmentSelector},
tss::TaskStateSegment,
@ -30,12 +30,14 @@ lazy_static! {
static ref GDT: (GlobalDescriptorTable, Selectors) = {
let mut gdt = GlobalDescriptorTable::new();
let code_selector = gdt.append(Descriptor::kernel_code_segment());
let data_selector = gdt.append(Descriptor::kernel_data_segment());
let tss_selector = gdt.append(Descriptor::tss_segment(&TSS));
(
gdt,
Selectors {
code_selector,
data_selector,
tss_selector,
},
)
@ -44,6 +46,7 @@ lazy_static! {
struct Selectors {
code_selector: SegmentSelector,
data_selector: SegmentSelector,
tss_selector: SegmentSelector,
}
@ -52,6 +55,11 @@ pub fn init() {
unsafe {
CS::set_reg(GDT.1.code_selector);
DS::set_reg(GDT.1.data_selector);
ES::set_reg(GDT.1.data_selector);
FS::set_reg(GDT.1.data_selector);
GS::set_reg(GDT.1.data_selector);
SS::set_reg(GDT.1.data_selector);
load_tss(GDT.1.tss_selector);
}
}