Fix end_va bug in translated_byte_buffer

4 years ago · 3ea60ee964
parent 902e0a2f69
commit 3ea60ee964
1 changed files with 5 additions and 1 deletions
--- a/os/src/mm/page_table.rs
+++ b/os/src/mm/page_table.rs
@ -166,7 +166,11 @@ pub fn translated_byte_buffer(token: usize, ptr: *const u8, len: usize) -> Vec<&
        vpn.step();
        let mut end_va: VirtAddr = vpn.into();
        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();
    }
    v