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Fix end_va bug in translated_byte_buffer

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This commit is contained in:
Yifan Wu 2021-03-23 19:19:21 +08:00
parent 902e0a2f69
commit 3ea60ee964
1 changed files with 5 additions and 1 deletions
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6
os/src/mm/page_table.rs
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@ -166,7 +166,11 @@ pub fn translated_byte_buffer(token: usize, ptr: *const u8, len: usize) -> Vec<&
vpn.step(); vpn.step();
let mut end_va: VirtAddr = vpn.into(); let mut end_va: VirtAddr = vpn.into();
end_va = end_va.min(VirtAddr::from(end)); end_va = end_va.min(VirtAddr::from(end));
v.push(&mut ppn.get_bytes_array()[start_va.page_offset()..end_va.page_offset()]); if end_va.page_offset() == 0 {
v.push(&mut ppn.get_bytes_array()[start_va.page_offset()..]);
} else {
v.push(&mut ppn.get_bytes_array()[start_va.page_offset()..end_va.page_offset()]);
}
start = end_va.into(); start = end_va.into();
} }
v v