michaelkuc6/blog_os
1
0
Fork 0
mirror of https://github.com/phil-opp/blog_os.git synced 2025-12-16 22:37:49 +00:00
Code Issues Projects Releases Wiki Activity

Add a Gdt::load method

Browse Source
This commit is contained in:
Philipp Oppermann
2017-04-19 12:10:03 +02:00
parent 238cc575c3
commit 58e90d497e
1 changed files with 12 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

12
src/interrupts/gdt.rs
View File

@@ -27,6 +27,18 @@ impl Gdt {
SegmentSelector::new(index as u16, PrivilegeLevel::Ring0) SegmentSelector::new(index as u16, PrivilegeLevel::Ring0)
} }
pub fn load(&'static self) {
use x86_64::instructions::tables::{DescriptorTablePointer, lgdt};
use core::mem::size_of;
let ptr = DescriptorTablePointer {
base: self.table.as_ptr() as u64,
limit: (self.table.len() * size_of::<u64>() - 1) as u16,
};
unsafe { lgdt(&ptr) };
}
fn push(&mut self, value: u64) -> usize { fn push(&mut self, value: u64) -> usize {
if self.next_free < self.table.len() { if self.next_free < self.table.len() {
let index = self.next_free; let index = self.next_free;