Start work on object loader using llvm's RuntimeDyld api.

lib/llvm-backend/cpp/object_loader.hh

@@ -0,0 +1,40 @@
+#include <cstddef>
+#include <cstdint>
+
+typedef enum {
+    PROTECT_NONE,
+    PROTECT_READ,
+    PROTECT_READ_WRITE,
+    PROTECT_READ_EXECUTE,
+} mem_protect_t;
+
+typedef enum {
+    RESULT_OK,
+    RESULT_ALLOCATE_FAILURE,
+    RESULT_PROTECT_FAILURE,
+    RESULT_DEALLOC_FAILURE,
+    RESULT_OBJECT_LOAD_FAILURE,
+} result_t;
+
+typedef result_t (*alloc_memory_t)(size_t size, mem_protect_t protect, uint8_t** ptr_out, size_t* size_out);
+typedef result_t (*protect_memory_t)(uint8_t* ptr, size_t size, mem_protect_t protect);
+typedef result_t (*dealloc_memory_t)(uint8_t* ptr, size_t size);
+typedef uintptr_t (*lookup_vm_symbol_t)(char* name_ptr, size_t name_size);
+
+typedef struct {
+    /* Memory management. */
+    alloc_memory_t alloc_memory;
+    protect_memory_t protect_memory;
+    dealloc_memory_t dealloc_memory;
+
+    lookup_vm_symbol_t lookup_vm_symbol;
+} callbacks_t;
+
+extern "C" {
+    result_t object_load(uint8_t* mem_ptr, size_t mem_size, callbacks_t* callbacks) {
+        return RESULT_OK;
+    }
+
+    void test_cpp() {
+    }
+}