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Turn page of old P4 into guard page

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Philipp Oppermann
2017-04-18 12:35:19 +02:00
parent 2a3ce863fd
commit c6dd37dcc5
1 changed files with 7 additions and 0 deletions
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7
src/memory/paging/mod.rs
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@@ -196,4 +196,11 @@ pub fn remap_the_kernel<A>(allocator: &mut A, boot_info: &BootInformation)
let old_table = active_table.switch(new_table); let old_table = active_table.switch(new_table);
println!("NEW TABLE!!!"); println!("NEW TABLE!!!");
// turn the old p4 page into a guard page
let old_p4_page = Page::containing_address(
old_table.p4_frame.start_address()
);
active_table.unmap(old_p4_page, allocator);
println!("guard page at {:#x}", old_p4_page.start_address());
} }