Massive refactoring of all code + audio skeleton.

This should make it easier to find files and (in the future) split things
up into separate libraries.
It also changes around emulator initialization to make it a little more
difficult to do things out of order and a little more sensible as to when
real init work happens.
Also adding a skeleton audio system/driver and reworking CPU register
access to be more extensible.

src/xenia/export_resolver.h

@@ -0,0 +1,97 @@
+/**
+ ******************************************************************************
+ * Xenia : Xbox 360 Emulator Research Project                                 *
+ ******************************************************************************
+ * Copyright 2013 Ben Vanik. All rights reserved.                             *
+ * Released under the BSD license - see LICENSE in the root for more details. *
+ ******************************************************************************
+ */
+
+#ifndef XENIA_EXPORT_RESOLVER_H_
+#define XENIA_EXPORT_RESOLVER_H_
+
+#include <xenia/core.h>
+
+#include <vector>
+
+
+typedef struct xe_ppc_state xe_ppc_state_t;
+
+
+namespace xe {
+
+
+typedef void (*xe_kernel_export_impl_fn)();
+typedef void (*xe_kernel_export_shim_fn)(xe_ppc_state_t*, void*);
+
+class KernelExport {
+public:
+  enum ExportType {
+    Function = 0,
+    Variable = 1,
+  };
+
+  uint32_t      ordinal;
+  ExportType    type;
+  uint32_t      flags;
+  char          signature[16];
+  char          name[96];
+
+  bool          is_implemented;
+
+  union {
+    // Variable data. Only valid when kXEKernelExportFlagVariable is set.
+    // This is an address in the client memory space that the variable can
+    // be found at.
+    uint32_t    variable_ptr;
+
+    struct {
+      // Second argument passed to the shim function.
+      void* shim_data;
+
+      // Shimmed implementation.
+      // This is called directly from generated code.
+      // It should parse args, do fixups, and call the impl.
+      xe_kernel_export_shim_fn shim;
+
+      // Real function implementation.
+      xe_kernel_export_impl_fn impl;
+    } function_data;
+  };
+};
+
+
+class ExportResolver {
+public:
+  ExportResolver();
+  ~ExportResolver();
+
+  void RegisterTable(const char* library_name, KernelExport* exports,
+                     const size_t count);
+
+  KernelExport* GetExportByOrdinal(const char* library_name,
+                                   const uint32_t ordinal);
+  KernelExport* GetExportByName(const char* library_name, const char* name);
+
+  void SetVariableMapping(const char* library_name, const uint32_t ordinal,
+                          uint32_t value);
+  void SetFunctionMapping(const char* library_name, const uint32_t ordinal,
+                          void* shim_data, xe_kernel_export_shim_fn shim,
+                          xe_kernel_export_impl_fn impl);
+
+private:
+  class ExportTable {
+  public:
+    char          name[32];
+    KernelExport* exports;
+    size_t        count;
+  };
+
+  std::vector<ExportTable> tables_;
+};
+
+
+}  // namespace xe
+
+
+#endif  // XENIA_EXPORT_RESOLVER_H_