1 files changed, 105 insertions, 0 deletions
diff --git a/src/VBox/Runtime/r3/posix/RTMemProtect-posix.cpp b/src/VBox/Runtime/r3/posix/RTMemProtect-posix.cpp
new file mode 100644
index 00000000..41400a87
--- /dev/null
+++ b/src/VBox/Runtime/r3/posix/RTMemProtect-posix.cpp
@@ -0,0 +1,105 @@
+/* $Id: RTMemProtect-posix.cpp $ */
+/** @file
+ * IPRT - Memory Allocation, POSIX.
+ */
+
+/*
+ * Copyright (C) 2006-2023 Oracle and/or its affiliates.
+ *
+ * This file is part of VirtualBox base platform packages, as
+ * available from https://www.virtualbox.org.
+ *
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU General Public License
+ * as published by the Free Software Foundation, in version 3 of the
+ * License.
+ *
+ * This program is distributed in the hope that it will be useful, but
+ * WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, see <https://www.gnu.org/licenses>.
+ *
+ * The contents of this file may alternatively be used under the terms
+ * of the Common Development and Distribution License Version 1.0
+ * (CDDL), a copy of it is provided in the "COPYING.CDDL" file included
+ * in the VirtualBox 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.
+ *
+ * SPDX-License-Identifier: GPL-3.0-only OR CDDL-1.0
+ */
+
+
+/*********************************************************************************************************************************
+*   Header Files                                                                                                                 *
+*********************************************************************************************************************************/
+#include <iprt/alloc.h>
+#include <iprt/assert.h>
+#include <iprt/param.h>
+#include <iprt/errcore.h>
+#include <iprt/string.h>
+
+#include <errno.h>
+#include <sys/mman.h>
+
+
+RTDECL(int) RTMemProtect(void *pv, size_t cb, unsigned fProtect) RT_NO_THROW_DEF
+{
+    /*
+     * Validate input.
+     */
+    if (cb == 0)
+    {
+        AssertMsgFailed(("!cb\n"));
+        return VERR_INVALID_PARAMETER;
+    }
+    if (fProtect & ~(RTMEM_PROT_NONE | RTMEM_PROT_READ | RTMEM_PROT_WRITE | RTMEM_PROT_EXEC))
+    {
+        AssertMsgFailed(("fProtect=%#x\n", fProtect));
+        return VERR_INVALID_PARAMETER;
+    }
+
+    /*
+     * Convert the flags.
+     */
+    int fProt;
+#if     RTMEM_PROT_NONE  == PROT_NONE \
+    &&  RTMEM_PROT_READ  == PROT_READ \
+    &&  RTMEM_PROT_WRITE == PROT_WRITE \
+    &&  RTMEM_PROT_EXEC  == PROT_EXEC
+    fProt = fProtect;
+#else
+    Assert(!RTMEM_PROT_NONE);
+    if (!fProtect)
+        fProt = PROT_NONE;
+    else
+    {
+        fProt = 0;
+        if (fProtect & RTMEM_PROT_READ)
+            fProt |= PROT_READ;
+        if (fProtect & RTMEM_PROT_WRITE)
+            fProt |= PROT_WRITE;
+        if (fProtect & RTMEM_PROT_EXEC)
+            fProt |= PROT_EXEC;
+    }
+#endif
+
+    /*
+     * Align the request.
+     */
+    cb += (uintptr_t)pv & PAGE_OFFSET_MASK;
+    pv = (void *)((uintptr_t)pv & ~PAGE_OFFSET_MASK);
+
+    /*
+     * Change the page attributes.
+     */
+    int rc = mprotect(pv, cb, fProt);
+    if (!rc)
+        return rc;
+    return RTErrConvertFromErrno(errno);
+}