From f8fe689a81f906d1b91bb3220acde2a4ecb14c5b Mon Sep 17 00:00:00 2001
From: Daniel Baumann <daniel.baumann@progress-linux.org>
Date: Mon, 6 May 2024 05:01:46 +0200
Subject: Adding upstream version 6.0.4-dfsg.

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
---
 .../r0drv/darwin/memuserkernel-r0drv-darwin.cpp    | 118 +++++++++++++++++++++
 1 file changed, 118 insertions(+)
 create mode 100644 src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp

(limited to 'src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp')

diff --git a/src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp b/src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp
new file mode 100644
index 00000000..3375386a
--- /dev/null
+++ b/src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp
@@ -0,0 +1,118 @@
+/* $Id: memuserkernel-r0drv-darwin.cpp $ */
+/** @file
+ * IPRT - User & Kernel Memory, Ring-0 Driver, Darwin.
+ */
+
+/*
+ * Copyright (C) 2009-2019 Oracle Corporation
+ *
+ * This file is part of VirtualBox Open Source Edition (OSE), as
+ * available from http://www.virtualbox.org. This file is free software;
+ * you can redistribute it and/or modify it under the terms of the GNU
+ * General Public License (GPL) as published by the Free Software
+ * Foundation, in version 2 as it comes in the "COPYING" file of the
+ * VirtualBox OSE distribution. VirtualBox OSE is distributed in the
+ * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL) only, as it comes in the "COPYING.CDDL" file of the
+ * VirtualBox OSE distribution, in which case the provisions of the
+ * CDDL are applicable instead of those of the GPL.
+ *
+ * You may elect to license modified versions of this file under the
+ * terms and conditions of either the GPL or the CDDL or both.
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include "the-darwin-kernel.h"
+#include "internal/iprt.h"
+#include <iprt/mem.h>
+#include <iprt/assert.h>
+
+#if defined(RT_ARCH_AMD64) || defined(RT_ARCH_X86)
+# include <iprt/asm-amd64-x86.h>
+#endif
+#include <iprt/errcore.h>
+
+
+RTR0DECL(int) RTR0MemUserCopyFrom(void *pvDst, RTR3PTR R3PtrSrc, size_t cb)
+{
+    RT_ASSERT_INTS_ON();
+    IPRT_DARWIN_SAVE_EFL_AC();
+    int rc = copyin((const user_addr_t)R3PtrSrc, pvDst, cb);
+    IPRT_DARWIN_RESTORE_EFL_AC();
+    if (RT_LIKELY(rc == 0))
+        return VINF_SUCCESS;
+    return VERR_ACCESS_DENIED;
+}
+
+
+RTR0DECL(int) RTR0MemUserCopyTo(RTR3PTR R3PtrDst, void const *pvSrc, size_t cb)
+{
+    RT_ASSERT_INTS_ON();
+    IPRT_DARWIN_SAVE_EFL_AC();
+    int rc = copyout(pvSrc, R3PtrDst, cb);
+    IPRT_DARWIN_RESTORE_EFL_AC();
+    if (RT_LIKELY(rc == 0))
+        return VINF_SUCCESS;
+    return VERR_ACCESS_DENIED;
+}
+
+
+RTR0DECL(bool) RTR0MemUserIsValidAddr(RTR3PTR R3Ptr)
+{
+    /* the commpage is above this. */
+#ifdef RT_ARCH_X86
+    return R3Ptr < VM_MAX_ADDRESS;
+#else
+    return R3Ptr < VM_MAX_PAGE_ADDRESS;
+#endif
+}
+
+
+RTR0DECL(bool) RTR0MemKernelIsValidAddr(void *pv)
+{
+    /* Found no public #define or symbol for checking this, so we'll
+       have to make do with thing found in the debugger and the sources. */
+#ifdef RT_ARCH_X86
+    NOREF(pv);
+    return true;    /* Almost anything is a valid kernel address here. */
+
+#elif defined(RT_ARCH_AMD64)
+    return (uintptr_t)pv >= UINT64_C(0xffff800000000000);
+
+#else
+# error "PORTME"
+#endif
+}
+
+
+RTR0DECL(bool) RTR0MemAreKrnlAndUsrDifferent(void)
+{
+    /* As mentioned in RTR0MemKernelIsValidAddr, found no way of checking
+       this at compiler or runtime. */
+#ifdef RT_ARCH_X86
+    return false;
+#else
+    return true;
+#endif
+}
+
+
+RTR0DECL(int) RTR0MemKernelCopyFrom(void *pvDst, void const *pvSrc, size_t cb)
+{
+    RT_NOREF(pvDst, pvSrc, cb);
+    return VERR_NOT_SUPPORTED;
+}
+
+
+RTR0DECL(int) RTR0MemKernelCopyTo(void *pvDst, void const *pvSrc, size_t cb)
+{
+    RT_NOREF(pvDst, pvSrc, cb);
+    return VERR_NOT_SUPPORTED;
+}
+
-- 
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