public int Read(long position, byte[] buffer, int bufferOffset, int count)
{
int bytesRead = 0;
while (bytesRead != count)
{
int i = 0;
for (; i < _segments.Length; i++)
{
ref ElfProgramHeader64 header = ref _segments[i].RefHeader;
long upperAddress = header.VirtualAddress + header.VirtualSize;
if (header.VirtualAddress <= position && position < upperAddress)
{
int bytesToReadRange = (int)Math.Min(count - bytesRead, upperAddress - position);
long segmentOffset = position - header.VirtualAddress;
int bytesReadRange = _segments[i].AddressSpace.Read(segmentOffset, buffer, bufferOffset, bytesToReadRange);
if (bytesReadRange == 0)
{
goto done;
}
position += bytesReadRange;
bufferOffset += bytesReadRange;
bytesRead += bytesReadRange;
break;
}
}
if (i == _segments.Length)
{
break;
}
}
public int Read(long position, byte[] buffer, int bufferOffset, int count)
{
for (int i = 0; i < _segments.Count; i++)
{
ref ElfProgramHeader64 header = ref _segments[i].RefHeader;
// FileSize == 0 means the segment isn't backed by any data
if (header.FileSize > 0 && header.VirtualAddress <= position && position + count <= header.VirtualAddress + header.VirtualSize)
{
long segmentOffset = position - header.VirtualAddress;
int fileBytes = (int)Math.Min(count, header.FileSize);
long fileOffset = header.FileOffset + segmentOffset;
int bytesRead = _addressSpace.Read(fileOffset, buffer, bufferOffset, fileBytes);
//zero the rest of the buffer if it is in the virtual address space but not the physical address space
if (bytesRead == fileBytes && fileBytes != count)
{
Array.Clear(buffer, bufferOffset + fileBytes, count - fileBytes);
bytesRead = count;
}
return(bytesRead);
}
}