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kernel: mem: zero out memory as part of alloc()

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Signed-off-by: Sean Cross <sean@xobs.io>
This commit is contained in:
Sean Cross 2020-03-14 22:11:57 +08:00
parent db87a94960
commit 99d19866cf
1 changed files with 6 additions and 2 deletions
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8
kernel/src/mem.rs
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@ -218,7 +218,9 @@ impl MemoryManager {
if self.allocations[index] == 0 {
self.allocations[index] = pid;
self.last_ram_page = index + 1;
return Ok(index * PAGE_SIZE + self.ram_start);
let page = (index * PAGE_SIZE + self.ram_start) as *mut usize;
unsafe { page.write_bytes(0, PAGE_SIZE / mem::size_of::<usize>()) };
return Ok(page as usize);
}
}
for index in 0..self.last_ram_page {
@ -226,7 +228,9 @@ impl MemoryManager {
if self.allocations[index] == 0 {
self.allocations[index] = pid;
self.last_ram_page = index + 1;
return Ok(index * PAGE_SIZE + self.ram_start);
let page = (index * PAGE_SIZE + self.ram_start) as *mut usize;
unsafe { page.write_bytes(0, PAGE_SIZE / mem::size_of::<usize>()) };
return Ok(page as usize);
}
}
Err(xous::Error::OutOfMemory)