-/*
+/**
+ * \file
* Copyright 2014 Xamarin Inc
+ * Licensed under the MIT license. See LICENSE file in the project root for full license information.
*/
#ifndef __MONO_METADATA_ABI_DETAILS_H__
#define __MONO_METADATA_ABI_DETAILS_H__
#include <config.h>
#include <glib.h>
-#define MONO_ABI_ALIGNOF(type) MONO_ALIGN_ ## type
-#define MONO_CURRENT_ABI_ALIGNOF(type) ((int)G_STRUCT_OFFSET(struct { char c; type x; }, x))
+/*
+ * This file defines macros to compute sizes/alignments/field offsets which depend on
+ * the ABI. It is needed during cross compiling since the generated code needs to
+ * contain offsets which correspond to the ABI of the target, not the host.
+ * It defines the following macros:
+ * - MONO_ABI_SIZEOF(type) for every basic type
+ * - MONO_ABI_ALIGNOF(type) for every basic type
+ * - MONO_STRUCT_OFFSET(struct, field) for various runtime structures
+ * When not cross compiling, these correspond to the host ABI (i.e. sizeof/offsetof).
+ * When cross compiling, these are defined in a generated header file which is
+ * generated by the offsets tool in tools/offsets-tool. The name of the file
+ * is given by the --with-cross-offsets= configure argument.
+ */
+#define MONO_ABI_ALIGNOF(type) MONO_ALIGN_ ## type
+#define MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(type) typedef struct { char c; type x; } Mono_Align_Struct_ ##type;
+#define MONO_CURRENT_ABI_ALIGNOF(type) ((int)G_STRUCT_OFFSET(Mono_Align_Struct_ ##type, x))
+#define MONO_ABI_SIZEOF(type) MONO_SIZEOF_ ## type
+#define MONO_CURRENT_ABI_SIZEOF(type) ((int)sizeof(type))
#undef DECL_OFFSET
#undef DECL_OFFSET2
#define DECL_OFFSET2(struct,field,offset) MONO_OFFSET_ ## struct ## _ ## field = offset,
#define DECL_ALIGN(type) MONO_ALIGN_ ##type = MONO_CURRENT_ABI_ALIGNOF (type),
#define DECL_ALIGN2(type,size) MONO_ALIGN_ ##type = size,
+#define DECL_SIZE(type) MONO_SIZEOF_ ##type = MONO_CURRENT_ABI_SIZEOF (type),
+#define DECL_SIZE2(type,size) MONO_SIZEOF_ ##type = size,
+
+/* Needed by MONO_CURRENT_ABI_ALIGNOF */
+MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(gint8)
+MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(gint16)
+MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(gint32)
+MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(gint64)
+MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(float)
+MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(double)
+MONO_CURRENT_ABI_ALIGNOF_TYPEDEF(gpointer)
enum {
#include "object-offsets.h"
#ifdef USED_CROSS_COMPILER_OFFSETS
#define MONO_STRUCT_OFFSET(struct,field) MONO_OFFSET_ ## struct ## _ ## field
#else
+#if defined(HAS_CROSS_COMPILER_OFFSETS) || defined(MONO_CROSS_COMPILE)
#define MONO_STRUCT_OFFSET(struct,field) (MONO_OFFSET_ ## struct ## _ ## field == -1, G_STRUCT_OFFSET (struct,field))
+#else
+#define MONO_STRUCT_OFFSET(struct,field) G_STRUCT_OFFSET (struct,field)
+#endif
#endif
#endif