From mboxrd@z Thu Jan 1 00:00:00 1970 Return-Path: Received-SPF: Pass (sender SPF authorized) identity=mailfrom; client-ip=192.55.52.93; helo=mga11.intel.com; envelope-from=jian.j.wang@intel.com; receiver=edk2-devel@lists.01.org Received: from mga11.intel.com (mga11.intel.com [192.55.52.93]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by ml01.01.org (Postfix) with ESMTPS id 07B6F21CF58B4 for ; Mon, 9 Oct 2017 07:14:03 -0700 (PDT) Received: from fmsmga002.fm.intel.com ([10.253.24.26]) by fmsmga102.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 09 Oct 2017 07:17:28 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.42,500,1500966000"; d="scan'208";a="1228750979" Received: from sunyanwa-mobl1.ccr.corp.intel.com (HELO jwang36-MOBL2.ccr.corp.intel.com) ([10.255.25.15]) by fmsmga002.fm.intel.com with ESMTP; 09 Oct 2017 07:17:27 -0700 From: Jian J Wang To: edk2-devel@lists.01.org Date: Mon, 9 Oct 2017 22:17:16 +0800 Message-Id: <20171009141722.992-1-jian.j.wang@intel.com> X-Mailer: git-send-email 2.14.1.windows.1 Subject: [PATCH v4 0/6] Add NULL pointer detection feature X-BeenThere: edk2-devel@lists.01.org X-Mailman-Version: 2.1.22 Precedence: list List-Id: EDK II Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , X-List-Received-Date: Mon, 09 Oct 2017 14:14:04 -0000 The mechanism behind is to trigger a page fault exception at address 0. This can be made by disabling page 0 (0-4095) during page table setup. So this feature can only be available on platform with paging enabled. Once this feature is enabled, any code, like CSM, which has to access memory in page 0 needs to enable this page temporarily in advance and disable it afterwards. PcdNullPointerDetectionPropertyMask is used to control and elaborate the use cases. For example, BIT7 of this PCD must be set for Windows 7 boot on Qemu if BIT0 set; or boot will fail. Suggested-by: Ayellet Wolman Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Jian J Wang Jian J Wang (5): MdeModulePkg/DxeIpl: Implement NULL pointer detection MdeModulePkg/Core/Dxe: Add EndOfDxe workaround for NULL pointer detection UefiCpuPkg/PiSmmCpuDxeSmm: Implement NULL pointer detection for SMM code IntelFrameworkModulePkg/Csm: Add code to bypass NULL pointer detection OvmfPkg/QemuVideoDxe: Bypass NULL pointer detection during VBE SHIM installing Wang, Jian J (1): MdeModulePkg/MdeModulePkg.dec,.uni: Add NULL pointer detection PCD .../Csm/BiosThunk/KeyboardDxe/BiosKeyboard.c | 101 ++++++++++++++ .../Csm/BiosThunk/KeyboardDxe/BiosKeyboard.h | 2 + .../Csm/BiosThunk/KeyboardDxe/KeyboardDxe.inf | 2 + .../Csm/LegacyBiosDxe/LegacyBda.c | 4 + .../Csm/LegacyBiosDxe/LegacyBios.c | 152 +++++++++++++++++++++ .../Csm/LegacyBiosDxe/LegacyBiosDxe.inf | 2 + .../Csm/LegacyBiosDxe/LegacyBiosInterface.h | 18 +++ .../Csm/LegacyBiosDxe/LegacyBootSupport.c | 23 +++- .../Csm/LegacyBiosDxe/LegacyPci.c | 17 ++- IntelFrameworkModulePkg/Csm/LegacyBiosDxe/Thunk.c | 27 +++- MdeModulePkg/Core/Dxe/DxeMain.inf | 1 + MdeModulePkg/Core/Dxe/Mem/Page.c | 4 +- MdeModulePkg/Core/Dxe/Misc/MemoryProtection.c | 65 +++++++++ MdeModulePkg/Core/DxeIplPeim/DxeIpl.h | 25 ++++ MdeModulePkg/Core/DxeIplPeim/DxeIpl.inf | 1 + MdeModulePkg/Core/DxeIplPeim/DxeLoad.c | 1 + MdeModulePkg/Core/DxeIplPeim/Ia32/DxeLoadFunc.c | 17 ++- MdeModulePkg/Core/DxeIplPeim/X64/DxeLoadFunc.c | 4 + MdeModulePkg/Core/DxeIplPeim/X64/VirtualMemory.c | 93 ++++++++++++- MdeModulePkg/MdeModulePkg.dec | 13 ++ MdeModulePkg/MdeModulePkg.uni | 13 ++ OvmfPkg/QemuVideoDxe/QemuVideoDxe.inf | 1 + OvmfPkg/QemuVideoDxe/VbeShim.c | 14 ++ UefiCpuPkg/PiSmmCpuDxeSmm/Ia32/PageTbl.c | 12 ++ UefiCpuPkg/PiSmmCpuDxeSmm/MpService.c | 25 +++- UefiCpuPkg/PiSmmCpuDxeSmm/PiSmmCpuDxeSmm.inf | 1 + UefiCpuPkg/PiSmmCpuDxeSmm/X64/PageTbl.c | 12 ++ 27 files changed, 628 insertions(+), 22 deletions(-) -- 2.14.1.windows.1