From 03aacdb73d2f797768129d54ac971b48756fa51a Mon Sep 17 00:00:00 2001
From: Jan-Marek Glogowski <glogow@fbihome.de>
Date: Fri, 17 Jul 2020 22:59:07 +0200
Subject: bridges: add a Windows Arm64 UNO bridge

Since Microsoft follows the general ARM64 ABI calling conventions,
and the SEH exception handling is the same, this result is a mixed
port of the gcc3_linux_aarch64 bridge and the refactored x86-64
exception handling.

I have no idea, if the complicated 32-bit handling in RaiseInfo()
is needed, as the ARM64 trampolines definitly use 64-bit code.
But since this is the first working version, I currently don't
mind much ;-)

There is definitly more potential for refactoring in the whole
bridges directory...

Change-Id: I9782a2e99c0231cdd1286af156ad312229eccf39
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/103642
Tested-by: Jenkins
Reviewed-by: Jan-Marek Glogowski <glogow@fbihome.de>
---
 bridges/inc/msvc/arm64.hxx  | 59 +++++++++++++++++++++++++++++++++++++++++++++
 bridges/inc/msvc/except.hxx |  6 ++---
 2 files changed, 61 insertions(+), 4 deletions(-)
 create mode 100644 bridges/inc/msvc/arm64.hxx

(limited to 'bridges/inc')

diff --git a/bridges/inc/msvc/arm64.hxx b/bridges/inc/msvc/arm64.hxx
new file mode 100644
index 000000000000..fb095446b097
--- /dev/null
+++ b/bridges/inc/msvc/arm64.hxx
@@ -0,0 +1,59 @@
+/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
+/*
+ * This file is part of the LibreOffice project.
+ *
+ * This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/.
+ *
+ * This file incorporates work covered by the following license notice:
+ *
+ *   Licensed to the Apache Software Foundation (ASF) under one or more
+ *   contributor license agreements. See the NOTICE file distributed
+ *   with this work for additional information regarding copyright
+ *   ownership. The ASF licenses this file to you under the Apache
+ *   License, Version 2.0 (the "License"); you may not use this file
+ *   except in compliance with the License. You may obtain a copy of
+ *   the License at http://www.apache.org/licenses/LICENSE-2.0 .
+ */
+
+#pragma once
+
+#include <msvc/except.hxx>
+
+#pragma pack(push, 8)
+
+struct ExceptionType final
+{
+    sal_Int32 _n0; // flags
+    sal_uInt32 _pTypeInfo; // typeinfo
+    sal_Int32 _n1, _n2, _n3; // thiscast
+    sal_Int32 _n4; // object_size
+    sal_uInt32 _pCopyCtor; // copyctor
+    ExceptionTypeInfo exc_type_info;
+
+    explicit ExceptionType(unsigned char* pCode, sal_uInt64 pCodeBase,
+                           typelib_TypeDescription* pTD) throw();
+
+    ExceptionType(const ExceptionType&) = delete;
+    ExceptionType& operator=(const ExceptionType&) = delete;
+};
+
+struct RaiseInfo final
+{
+    sal_Int32 _n0;
+    sal_uInt32 _pDtor;
+    sal_Int32 _n2;
+    sal_uInt32 _types;
+
+    // Additional fields
+    typelib_TypeDescription* _pTD;
+    unsigned char* _code;
+    sal_uInt64 _codeBase;
+
+    explicit RaiseInfo(typelib_TypeDescription* pTD) throw();
+};
+
+#pragma pack(pop)
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
diff --git a/bridges/inc/msvc/except.hxx b/bridges/inc/msvc/except.hxx
index 8ed49a887a24..91a6441006a3 100644
--- a/bridges/inc/msvc/except.hxx
+++ b/bridges/inc/msvc/except.hxx
@@ -38,15 +38,13 @@ constexpr DWORD MSVC_EH_MAGIC_PARAM = 0x19930520;
 // The NT Exception code that msvcrt uses ('msc' | 0xE0000000)
 constexpr DWORD MSVC_EH_MAGIC_CODE = 0xE06D7363;
 
-#ifdef _M_IX86
+#if defined(_M_IX86)
 #define MSVC_EH_PARAMETERS 3 // Number of parameters in exception record for x86
-#else
-#ifdef _M_AMD64
+#elif defined(_M_AMD64) || defined(_M_ARM64)
 #define MSVC_EH_PARAMETERS 4 // Number of parameters in exception record for AMD64
 #else
 #error "Unsupported machine type"
 #endif
-#endif
 
 class type_info;
 struct RaiseInfo;
-- 
cgit