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uefi: initialize memory map buffer

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This is much easier than handling of `MaybeUninit` with casting things
around, and the performance overhead is negligible.
This commit is contained in:
Philipp Schuster 2026-06-21 18:06:44 +02:00
parent 68b5782ad5
commit 73acd67ade
1 changed files with 8 additions and 0 deletions
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8
uefi/src/mem/memory_map/impl_.rs
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@ -281,6 +281,12 @@ impl MemoryMapBackingMemory {
let memory_map_meta = boot::memory_map_size();
let len = Self::safe_allocation_size_hint(memory_map_meta);
let ptr = boot::allocate_pool(memory_type, len)?.as_ptr();
// Initialize all bytes.
//
// SAFETY: Pointer is valid.
unsafe {
ptr.write_bytes(0, len);
};
// Should be fine as UEFI always has allocations with a guaranteed
// alignment of 8 bytes.
@ -329,12 +335,14 @@ impl MemoryMapBackingMemory {
/// Returns a slice to the underlying memory.
#[must_use]
pub const fn as_slice(&self) -> &[u8] {
// SAFETY: Memory is valid and initialized.
unsafe { self.0.as_ref() }
}
/// Returns a mutable slice to the underlying memory.
#[must_use]
pub const fn as_mut_slice(&mut self) -> &mut [u8] {
// SAFETY: Memory is valid and initialized.
unsafe { self.0.as_mut() }
}
}