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SMMU: Fix Right Shift UB.

This commit is contained in:
Fernando Sahmkow 2024-01-07 04:50:06 +01:00 committed by Liam
parent a874ab0133
commit 0672847330
2 changed files with 4 additions and 4 deletions
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4
src/core/device_memory_manager.h
View File

@ -62,13 +62,13 @@ public:
DAddr subbits = static_cast<DAddr>(address & page_mask); DAddr subbits = static_cast<DAddr>(address & page_mask);
const u32 base = compressed_device_addr[(address >> page_bits)]; const u32 base = compressed_device_addr[(address >> page_bits)];
if ((base >> MULTI_FLAG_BITS) == 0) [[likely]] { if ((base >> MULTI_FLAG_BITS) == 0) [[likely]] {
const DAddr d_address = static_cast<DAddr>(base << page_bits) + subbits; const DAddr d_address = (static_cast<DAddr>(base) << page_bits) + subbits;
operation(d_address); operation(d_address);
return; return;
} }
InnerGatherDeviceAddresses(buffer, address); InnerGatherDeviceAddresses(buffer, address);
for (u32 value : buffer) { for (u32 value : buffer) {
operation(static_cast<DAddr>(value << page_bits) + subbits); operation((static_cast<DAddr>(value) << page_bits) + subbits);
} }
} }

4
src/core/device_memory_manager.inc
View File

@ -301,7 +301,7 @@ template <typename Traits>
u8* DeviceMemoryManager<Traits>::GetSpan(const DAddr src_addr, const std::size_t size) { u8* DeviceMemoryManager<Traits>::GetSpan(const DAddr src_addr, const std::size_t size) {
size_t page_index = src_addr >> page_bits; size_t page_index = src_addr >> page_bits;
size_t subbits = src_addr & page_mask; size_t subbits = src_addr & page_mask;
if ((continuity_tracker[page_index] << page_bits) >= size + subbits) { if ((static_cast<size_t>(continuity_tracker[page_index]) << page_bits) >= size + subbits) {
return GetPointer<u8>(src_addr); return GetPointer<u8>(src_addr);
} }
return nullptr; return nullptr;
@ -311,7 +311,7 @@ template <typename Traits>
const u8* DeviceMemoryManager<Traits>::GetSpan(const DAddr src_addr, const std::size_t size) const { const u8* DeviceMemoryManager<Traits>::GetSpan(const DAddr src_addr, const std::size_t size) const {
size_t page_index = src_addr >> page_bits; size_t page_index = src_addr >> page_bits;
size_t subbits = src_addr & page_mask; size_t subbits = src_addr & page_mask;
if ((continuity_tracker[page_index] << page_bits) >= size + subbits) { if ((static_cast<size_t>(continuity_tracker[page_index]) << page_bits) >= size + subbits) {
return GetPointer<u8>(src_addr); return GetPointer<u8>(src_addr);
} }
return nullptr; return nullptr;