зеркало из https://github.com/mozilla/gecko-dev.git
95 строки
3.1 KiB
C++
95 строки
3.1 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "mozilla/WindowsProcessMitigations.h"
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#include <processthreadsapi.h>
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#include "mozilla/Assertions.h"
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#include "mozilla/DynamicallyLinkedFunctionPtr.h"
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// See bug 1766432 comment 4. In the future, we should keep this static assert
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// when we remove MOZ_PROCESS_MITIGATION_DYNAMIC_CODE_POLICY.
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#include "mozilla/MozProcessMitigationDynamicCodePolicy.h"
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static_assert(sizeof(MOZ_PROCESS_MITIGATION_DYNAMIC_CODE_POLICY) == 4);
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#if (_WIN32_WINNT < 0x0602)
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BOOL WINAPI GetProcessMitigationPolicy(
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HANDLE hProcess, PROCESS_MITIGATION_POLICY MitigationPolicy, PVOID lpBuffer,
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SIZE_T dwLength);
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#endif // (_WIN32_WINNT < 0x0602)
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namespace mozilla {
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static decltype(&::GetProcessMitigationPolicy)
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FetchGetProcessMitigationPolicyFunc() {
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static const StaticDynamicallyLinkedFunctionPtr<
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decltype(&::GetProcessMitigationPolicy)>
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pGetProcessMitigationPolicy(L"kernel32.dll",
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"GetProcessMitigationPolicy");
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return pGetProcessMitigationPolicy;
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}
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static bool sWin32kLockedDownInPolicy = false;
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MFBT_API bool IsWin32kLockedDown() {
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static bool sWin32kLockedDown = []() {
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auto pGetProcessMitigationPolicy = FetchGetProcessMitigationPolicyFunc();
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PROCESS_MITIGATION_SYSTEM_CALL_DISABLE_POLICY polInfo;
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if (!pGetProcessMitigationPolicy ||
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!pGetProcessMitigationPolicy(::GetCurrentProcess(),
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ProcessSystemCallDisablePolicy, &polInfo,
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sizeof(polInfo))) {
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// We failed to get pointer to GetProcessMitigationPolicy or the call
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// to it failed, so just return what the sandbox policy says.
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return sWin32kLockedDownInPolicy;
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}
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return !!polInfo.DisallowWin32kSystemCalls;
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}();
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return sWin32kLockedDown;
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}
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MFBT_API void SetWin32kLockedDownInPolicy() {
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sWin32kLockedDownInPolicy = true;
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}
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MFBT_API bool IsDynamicCodeDisabled() {
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auto pGetProcessMitigationPolicy = FetchGetProcessMitigationPolicyFunc();
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if (!pGetProcessMitigationPolicy) {
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return false;
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}
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MOZ_PROCESS_MITIGATION_DYNAMIC_CODE_POLICY polInfo;
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if (!pGetProcessMitigationPolicy(::GetCurrentProcess(),
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ProcessDynamicCodePolicy, &polInfo,
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sizeof(polInfo))) {
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return false;
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}
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return polInfo.ProhibitDynamicCode;
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}
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MFBT_API bool IsEafPlusEnabled() {
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auto pGetProcessMitigationPolicy = FetchGetProcessMitigationPolicyFunc();
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if (!pGetProcessMitigationPolicy) {
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return false;
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}
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PROCESS_MITIGATION_PAYLOAD_RESTRICTION_POLICY polInfo;
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if (!pGetProcessMitigationPolicy(::GetCurrentProcess(),
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ProcessPayloadRestrictionPolicy, &polInfo,
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sizeof(polInfo))) {
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return false;
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}
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return polInfo.EnableExportAddressFilterPlus;
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}
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} // namespace mozilla
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