When the data is on a different page

[BaiFeng666]

`void ReadPhysicalAddress(const UINT32 pageIndex, const ULONG64 targetAddress, const PVOID buffer, const SIZE_T size) { const ULONG pageOffset = targetAddress % PAGE_SIZE; const ULONG64 pageStartPhysical = targetAddress - pageOffset;

_PAGE* pageInfo = &PageList[pageIndex];
const ULONG64 OldPFN = pageInfo->PTE->PFN;

pageInfo->PTE->PFN = PAGE_TO_PFN(pageStartPhysical);
__invlpg(pageInfo->VirtualAddress);

const PVOID virtualAddress = (PVOID)(((ULONG64)(pageInfo->VirtualAddress) + pageOffset));

// 计算跨页情况下需要读取的数据大小
SIZE_T firstPageSize = PAGE_SIZE - pageOffset;
SIZE_T secondPageSize = size - firstPageSize;

// 读取第一页的数据
memcpy(buffer, virtualAddress, firstPageSize);

// 如果跨页，继续读取第二页的数据
if (secondPageSize > 0) {
    // 计算第二页的起始地址
    const PVOID secondPageVirtualAddress = (PVOID)(((ULONG64)(pageInfo->VirtualAddress) + PAGE_SIZE));
    memcpy((char*)buffer + firstPageSize, secondPageVirtualAddress, secondPageSize);
}

pageInfo->PTE->PFN = OldPFN;
__invlpg(pageInfo->VirtualAddress);

}`

Maybe it could be optimized