コード例 #1
0
    void readPhysicalMemoryMap( HANDLE hPhysMem, u8 *buffer, u64 offset, unsigned int length)
    {
        unsigned int totalBytes = 0;
        unsigned int originalSize = length;
        unsigned int pageSize = length;

        if(!hPhysMem)
        {
            throw AccessErrorImpl( _("Handle to physical memory was not set or could not be opened.") );
        }

        if(0 == buffer)
        {
            throw AccessErrorImpl( _("Error accessing buffer.") );
        }

        while(totalBytes != originalSize )
        {
            DWORD BaseAddr;
            DWORD PhysAddr = static_cast<DWORD>(offset);

            // OK, first get the page that has the requested offset.  This
            // function will round-down physaddr to the nearest page boundary,
            // and the pageSize will change to the size of the page
            if (!MapMem(hPhysMem, (PVOID) &BaseAddr, &PhysAddr, reinterpret_cast<PDWORD>(&pageSize)))
            {
                throw AccessErrorImpl( _("Error mapping physical memory.") );
            }

            //Find the index into the page based on requested offset
            unsigned int index =  static_cast<DWORD>(offset) - PhysAddr;

            // Only continue to copy if the index is within the pageSize and
            // we still need bytes
            while( index < pageSize && totalBytes != originalSize)
            {
                u64 tmp = BaseAddr + index; // extra tmp to satisfy vc++ /w4
                buffer[totalBytes] = *reinterpret_cast<u8 *>(tmp);
                index++;
                totalBytes++;
            }

            u64 tmp = BaseAddr; // extra tmp to satisfy vc++ /w4
            if (!UnMapMem(reinterpret_cast<PVOID>(tmp)))
            {
                throw AccessErrorImpl( _("Error unmapping physical memory."));
            }

            // If the inner while loop exited due to the end of the page, we
            // need to update the offset and the remaining size and map
            // another page
            offset = PhysAddr + index;
            pageSize = originalSize-totalBytes;
        }
    }
コード例 #2
0
ファイル: OS_QNX.c プロジェクト: rickgaiser/xfree86-ps2
/*
 * MapVGA --
 *
 * Map the VGA memory window (0xA0000-0xAFFFF) as read/write memory for
 * the process for use in probing memory.
 */
Byte *MapVGA()
{
	return( MapMem(0xA0000,0x10000) );
}