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Fix overflow bug when ceiling va

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This commit is contained in:
Yifan Wu 2021-02-24 03:50:59 +08:00
parent e8a0682cf8
commit 35cc3d6e2f
1 changed files with 2 additions and 2 deletions
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4
os/src/mm/address.rs
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@ -73,7 +73,7 @@ impl From<VirtPageNum> for usize {
impl VirtAddr {
pub fn floor(&self) -> VirtPageNum { VirtPageNum(self.0 / PAGE_SIZE) }
pub fn ceil(&self) -> VirtPageNum { VirtPageNum((self.0 + PAGE_SIZE - 1) / PAGE_SIZE) }
pub fn ceil(&self) -> VirtPageNum { VirtPageNum((self.0 - 1 + PAGE_SIZE) / PAGE_SIZE) }
pub fn page_offset(&self) -> usize { self.0 & (PAGE_SIZE - 1) }
pub fn aligned(&self) -> bool { self.page_offset() == 0 }
}
@ -88,7 +88,7 @@ impl From<VirtPageNum> for VirtAddr {
}
impl PhysAddr {
pub fn floor(&self) -> PhysPageNum { PhysPageNum(self.0 / PAGE_SIZE) }
pub fn ceil(&self) -> PhysPageNum { PhysPageNum((self.0 + PAGE_SIZE - 1) / PAGE_SIZE) }
pub fn ceil(&self) -> PhysPageNum { PhysPageNum((self.0 - 1 + PAGE_SIZE) / PAGE_SIZE) }
pub fn page_offset(&self) -> usize { self.0 & (PAGE_SIZE - 1) }
pub fn aligned(&self) -> bool { self.page_offset() == 0 }
}