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Reload cs register and load TSS

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Philipp Oppermann
2017-04-19 12:15:52 +02:00
parent 165054d12a
commit aa8028cf6c
1 changed files with 15 additions and 3 deletions
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18
src/interrupts/mod.rs
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@@ -21,6 +21,10 @@ static GDT: Once<gdt::Gdt> = Once::new();
const DOUBLE_FAULT_IST_INDEX: usize = 0; const DOUBLE_FAULT_IST_INDEX: usize = 0;
pub fn init(memory_controller: &mut MemoryController) { pub fn init(memory_controller: &mut MemoryController) {
use x86_64::structures::gdt::SegmentSelector;
use x86_64::instructions::segmentation::set_cs;
use x86_64::instructions::tables::load_tss;
let double_fault_stack = memory_controller.alloc_stack(1) let double_fault_stack = memory_controller.alloc_stack(1)
.expect("could not allocate double fault stack"); .expect("could not allocate double fault stack");
@@ -31,15 +35,23 @@ pub fn init(memory_controller: &mut MemoryController) {
tss tss
}); });
let mut code_selector = SegmentSelector(0);
let mut tss_selector = SegmentSelector(0);
let gdt = GDT.call_once(|| { let gdt = GDT.call_once(|| {
let mut gdt = gdt::Gdt::new(); let mut gdt = gdt::Gdt::new();
let code_selector = gdt.add_entry(gdt::Descriptor:: code_selector = gdt.add_entry(gdt::Descriptor::kernel_code_segment());
kernel_code_segment()); tss_selector = gdt.add_entry(gdt::Descriptor::tss_segment(&tss));
let tss_selector = gdt.add_entry(gdt::Descriptor::tss_segment(&tss));
gdt gdt
}); });
gdt.load(); gdt.load();
unsafe {
// reload code segment register
set_cs(code_selector);
// load TSS
load_tss(tss_selector);
}
IDT.load(); IDT.load();
} }