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hypervisor: x86: add two safety comments

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Signed-off-by: Wei Liu <liuwe@microsoft.com>
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Wei Liu 2022-11-16 21:50:09 +00:00 committed by Liu Wei
parent 6c89c541da
commit 7f2723d9c6
1 changed files with 2 additions and 0 deletions
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2
hypervisor/src/arch/x86/mod.rs
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@ -272,6 +272,7 @@ impl LapicState {
use std::io::Cursor; use std::io::Cursor;
use std::mem; use std::mem;
// SAFETY: plain old data type
let sliceu8 = unsafe { let sliceu8 = unsafe {
// This array is only accessed as parts of a u32 word, so interpret it as a u8 array. // This array is only accessed as parts of a u32 word, so interpret it as a u8 array.
// Cursors are only readable on arrays of u8, not i8(c_char). // Cursors are only readable on arrays of u8, not i8(c_char).
@ -290,6 +291,7 @@ impl LapicState {
use std::io::Cursor; use std::io::Cursor;
use std::mem; use std::mem;
// SAFETY: plain old data type
let sliceu8 = unsafe { let sliceu8 = unsafe {
// This array is only accessed as parts of a u32 word, so interpret it as a u8 array. // This array is only accessed as parts of a u32 word, so interpret it as a u8 array.
// Cursors are only readable on arrays of u8, not i8(c_char). // Cursors are only readable on arrays of u8, not i8(c_char).