diff options
Diffstat (limited to 'src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp')
-rw-r--r-- | src/VBox/Runtime/r0drv/darwin/memuserkernel-r0drv-darwin.cpp | 118 |
1 files changed, 118 insertions, 0 deletions
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..78617cae --- /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) 2009-2020 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; +} + |