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Correctly mark unaligned write as such to avoid UB

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This commit is contained in:
bjorn3
2024-01-24 19:43:34 +01:00
parent fa58f5887e
commit 5e71f6f9df
1 changed files with 2 additions and 2 deletions
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src/arch/x86_64/gdt.rs
+2 -2
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@@ -143,14 +143,14 @@ pub unsafe fn pcr() -> *mut ProcessorControlRegion {
pub unsafe fn set_tss_stack(stack: usize) {
use super::pti::{PTI_CONTEXT_STACK, PTI_CPU_STACK};
core::ptr::addr_of_mut!((*pcr()).tss.rsp[0])
.write((PTI_CPU_STACK.as_ptr() as usize + PTI_CPU_STACK.len()) as u64);
.write_unaligned((PTI_CPU_STACK.as_ptr() as usize + PTI_CPU_STACK.len()) as u64);
PTI_CONTEXT_STACK = stack;
}
#[cfg(not(feature = "pti"))]
pub unsafe fn set_tss_stack(stack: usize) {
// TODO: If this increases performance, read gs:[offset] directly
core::ptr::addr_of_mut!((*pcr()).tss.rsp[0]).write(stack as u64);
core::ptr::addr_of_mut!((*pcr()).tss.rsp[0]).write_unaligned(stack as u64);
}
// Initialize startup GDT