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memory_manager: Add protections for invalid GPU addresses.

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- Avoid a crash in Xenoblade Chronicles 2.
This commit is contained in:
bunnei 2019-03-09 14:06:51 -05:00
parent 21eb4cfa7f
commit 197dcf0b5e
2 changed files with 45 additions and 24 deletions
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54
src/video_core/memory_manager.cpp
View File

@ -90,32 +90,44 @@ GPUVAddr MemoryManager::FindFreeRegion(GPUVAddr region_start, u64 size, u64 alig
return std::max(base, vma_handle->second.base); return std::max(base, vma_handle->second.base);
} }
std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr gpu_addr) { bool MemoryManager::IsAddressValid(GPUVAddr addr) const {
VAddr cpu_addr = page_table.backing_addr[gpu_addr >> page_bits]; return (addr >> page_bits) < page_table.pointers.size();
}
std::optional<VAddr> MemoryManager::GpuToCpuAddress(GPUVAddr addr) {
if (!IsAddressValid(addr)) {
return {};
}
VAddr cpu_addr = page_table.backing_addr[addr >> page_bits];
if (cpu_addr) { if (cpu_addr) {
return cpu_addr + (gpu_addr & page_mask); return cpu_addr + (addr & page_mask);
} }
return {}; return {};
} }
template <typename T> template <typename T>
T MemoryManager::Read(GPUVAddr vaddr) { T MemoryManager::Read(GPUVAddr addr) {
const u8* page_pointer = page_table.pointers[vaddr >> page_bits]; if (!IsAddressValid(addr)) {
return {};
}
const u8* page_pointer = page_table.pointers[addr >> page_bits];
if (page_pointer) { if (page_pointer) {
// NOTE: Avoid adding any extra logic to this fast-path block // NOTE: Avoid adding any extra logic to this fast-path block
T value; T value;
std::memcpy(&value, &page_pointer[vaddr & page_mask], sizeof(T)); std::memcpy(&value, &page_pointer[addr & page_mask], sizeof(T));
return value; return value;
} }
Common::PageType type = page_table.attributes[vaddr >> page_bits]; Common::PageType type = page_table.attributes[addr >> page_bits];
switch (type) { switch (type) {
case Common::PageType::Unmapped: case Common::PageType::Unmapped:
LOG_ERROR(HW_GPU, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, vaddr); LOG_ERROR(HW_GPU, "Unmapped Read{} @ 0x{:08X}", sizeof(T) * 8, addr);
return 0; return 0;
case Common::PageType::Memory: case Common::PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr); ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", addr);
break; break;
default: default:
UNREACHABLE(); UNREACHABLE();
@ -124,22 +136,26 @@ T MemoryManager::Read(GPUVAddr vaddr) {
} }
template <typename T> template <typename T>
void MemoryManager::Write(GPUVAddr vaddr, T data) { void MemoryManager::Write(GPUVAddr addr, T data) {
u8* page_pointer = page_table.pointers[vaddr >> page_bits]; if (!IsAddressValid(addr)) {
if (page_pointer) {
// NOTE: Avoid adding any extra logic to this fast-path block
std::memcpy(&page_pointer[vaddr & page_mask], &data, sizeof(T));
return; return;
} }
Common::PageType type = page_table.attributes[vaddr >> page_bits]; u8* page_pointer = page_table.pointers[addr >> page_bits];
if (page_pointer) {
// NOTE: Avoid adding any extra logic to this fast-path block
std::memcpy(&page_pointer[addr & page_mask], &data, sizeof(T));
return;
}
Common::PageType type = page_table.attributes[addr >> page_bits];
switch (type) { switch (type) {
case Common::PageType::Unmapped: case Common::PageType::Unmapped:
LOG_ERROR(HW_GPU, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8, LOG_ERROR(HW_GPU, "Unmapped Write{} 0x{:08X} @ 0x{:016X}", sizeof(data) * 8,
static_cast<u32>(data), vaddr); static_cast<u32>(data), addr);
return; return;
case Common::PageType::Memory: case Common::PageType::Memory:
ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", vaddr); ASSERT_MSG(false, "Mapped memory page without a pointer @ {:016X}", addr);
break; break;
default: default:
UNREACHABLE(); UNREACHABLE();
@ -156,6 +172,10 @@ template void MemoryManager::Write<u32>(GPUVAddr addr, u32 data);
template void MemoryManager::Write<u64>(GPUVAddr addr, u64 data); template void MemoryManager::Write<u64>(GPUVAddr addr, u64 data);
u8* MemoryManager::GetPointer(GPUVAddr addr) { u8* MemoryManager::GetPointer(GPUVAddr addr) {
if (!IsAddressValid(addr)) {
return {};
}
u8* page_pointer = page_table.pointers[addr >> page_bits]; u8* page_pointer = page_table.pointers[addr >> page_bits];
if (page_pointer) { if (page_pointer) {
return page_pointer + (addr & page_mask); return page_pointer + (addr & page_mask);

15
src/video_core/memory_manager.h
View File

@ -46,19 +46,19 @@ public:
MemoryManager(); MemoryManager();
GPUVAddr AllocateSpace(u64 size, u64 align); GPUVAddr AllocateSpace(u64 size, u64 align);
GPUVAddr AllocateSpace(GPUVAddr gpu_addr, u64 size, u64 align); GPUVAddr AllocateSpace(GPUVAddr addr, u64 size, u64 align);
GPUVAddr MapBufferEx(GPUVAddr cpu_addr, u64 size); GPUVAddr MapBufferEx(GPUVAddr cpu_addr, u64 size);
GPUVAddr MapBufferEx(GPUVAddr cpu_addr, GPUVAddr gpu_addr, u64 size); GPUVAddr MapBufferEx(GPUVAddr cpu_addr, GPUVAddr addr, u64 size);
GPUVAddr UnmapBuffer(GPUVAddr gpu_addr, u64 size); GPUVAddr UnmapBuffer(GPUVAddr addr, u64 size);
std::optional<VAddr> GpuToCpuAddress(GPUVAddr gpu_addr); std::optional<VAddr> GpuToCpuAddress(GPUVAddr addr);
template <typename T> template <typename T>
T Read(GPUVAddr vaddr); T Read(GPUVAddr addr);
template <typename T> template <typename T>
void Write(GPUVAddr vaddr, T data); void Write(GPUVAddr addr, T data);
u8* GetPointer(GPUVAddr vaddr); u8* GetPointer(GPUVAddr addr);
void ReadBlock(GPUVAddr src_addr, void* dest_buffer, std::size_t size); void ReadBlock(GPUVAddr src_addr, void* dest_buffer, std::size_t size);
void WriteBlock(GPUVAddr dest_addr, const void* src_buffer, std::size_t size); void WriteBlock(GPUVAddr dest_addr, const void* src_buffer, std::size_t size);
@ -69,6 +69,7 @@ private:
using VMAHandle = VMAMap::const_iterator; using VMAHandle = VMAMap::const_iterator;
using VMAIter = VMAMap::iterator; using VMAIter = VMAMap::iterator;
bool IsAddressValid(GPUVAddr addr) const;
void MapPages(GPUVAddr base, u64 size, u8* memory, Common::PageType type, void MapPages(GPUVAddr base, u64 size, u8* memory, Common::PageType type,
VAddr backing_addr = 0); VAddr backing_addr = 0);
void MapMemoryRegion(GPUVAddr base, u64 size, u8* target, VAddr backing_addr); void MapMemoryRegion(GPUVAddr base, u64 size, u8* target, VAddr backing_addr);