first steps towards a QEMU target backend

- This commit only enables linking against QEMU.  The abstraction layer is
  completely dysfunctional at this time.
- QEMU's build system needs to be patched in order to create a static
  library.  This patch is currently not included in the Fail* repository.
- QEMU's JIT compilation may complicate or even preclude the implementation
  of some of Fail*'s backend abstractions.  Only a minimal subset (serial
  I/O, memory, memory writes, save/restore) is planned for the first phase.

git-svn-id: https://www4.informatik.uni-erlangen.de/i4svn/danceos/trunk/devel/fail@1615 8c4709b5-6ec9-48aa-a5cd-a96041d1645a

src/core/sal/qemu/QEMUMemory.hpp

@@ -0,0 +1,41 @@
+#ifndef __QEMU_MEMORY_HPP__
+  #define __QEMU_MEMORY_HPP__
+
+#include "../Memory.hpp"
+
+namespace fail {
+
+/**
+ * \class QEMUMemoryManager
+ * Represents a concrete implemenation of the abstract
+ * MemoryManager to provide access to QEMU's memory pool.
+ */
+class QEMUMemoryManager : public MemoryManager {
+public:
+	size_t getPoolSize() const { return 0; /* TODO */ }
+	host_address_t getStartAddr() const { return 0; }
+	byte_t getByte(guest_address_t addr)
+	{
+		return static_cast<byte_t>(0); /* TODO */
+	}
+	void getBytes(guest_address_t addr, size_t cnt, void *dest)
+	{
+		char *d = static_cast<char *>(dest);
+		for (size_t i = 0; i < cnt; ++i)
+			d[i] = getByte(addr + i);
+	}
+	void setByte(guest_address_t addr, byte_t data)
+	{
+		/* TODO */
+	}
+	void setBytes(guest_address_t addr, size_t cnt, void const *src)
+	{
+		char const *s = static_cast<char const *>(src);
+		for (size_t i = 0; i < cnt; ++i)
+			setByte(addr + i, s[i]);
+	}
+};
+
+} // end-of-namespace: fail
+
+#endif // __QEMU_MEMORY_HPP__