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Fix unmap function by flushing the TLB

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Philipp Oppermann
2017-04-13 19:43:52 +02:00
parent eb5c9afa51
commit 55e602dc61
1 changed files with 5 additions and 2 deletions
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7
src/memory/paging/mod.rs
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@@ -138,6 +138,9 @@ impl ActivePageTable {
fn unmap<A>(&mut self, page: Page, allocator: &mut A)
where A: FrameAllocator
{
use x86_64::instructions::tlb;
use x86_64::VirtualAddress;
assert!(self.translate(page.start_address()).is_some());
let p1 = self.p4_mut()
@@ -147,12 +150,12 @@ impl ActivePageTable {
.expect("mapping code does not support huge pages");
let frame = p1[page.p1_index()].pointed_frame().unwrap();
p1[page.p1_index()].set_unused();
tlb::flush(VirtualAddress(page.start_address()));
// TODO free p(1,2,3) table if empty
allocator.deallocate_frame(frame);
//allocator.deallocate_frame(frame);
}
}
pub fn test_paging<A>(allocator: &mut A)
where A: FrameAllocator
{