Reviewed-by: Liming Gao <liming....@intel.com> > -----Original Message----- > From: Ni, Ruiyu > Sent: Friday, June 1, 2018 3:22 PM > To: edk2-devel@lists.01.org > Cc: Gao, Liming <liming....@intel.com>; Zeng, Star <star.z...@intel.com> > Subject: [PATCH 3/3] MdePkg/UefiRuntimeLib: Do not allow to be linked by DXE > driver > > When UefiRuntimeLib links to a DXE driver, its constructor > still registers a Virtual Address Change event. The event callback > will get called when RT.SetVirtualAddressMap() is called from OS. > But when the driver is a DXE driver, the memory occupied by the > callback function might be zeroed or used by OS since the BS type > memory is free memory when entering to RT phase. > > The patch reverts commit 97511979b4fdd84cf7cd51e43c22dc03e79bd4f3 > "MdePkg/UefiRuntimeLib: Support more module types." > It makes sure that DXE driver cannot link to this library. > > Contributed-under: TianoCore Contribution Agreement 1.1 > Signed-off-by: Ruiyu Ni <ruiyu...@intel.com> > Cc: Liming Gao <liming....@intel.com> > Cc: Star Zeng <star.z...@intel.com> > --- > MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf | 4 ++-- > 1 file changed, 2 insertions(+), 2 deletions(-) > > diff --git a/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf > b/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf > index d053da545a..8f46495fc5 100644 > --- a/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf > +++ b/MdePkg/Library/UefiRuntimeLib/UefiRuntimeLib.inf > @@ -5,7 +5,7 @@ > # EVT_SIGNAL_EXIT_BOOT_SERVICES event, to provide runtime services. > # This instance also supports SAL drivers for better performance. > # > -# Copyright (c) 2006 - 2017, Intel Corporation. All rights reserved.<BR> > +# Copyright (c) 2006 - 2014, Intel Corporation. All rights reserved.<BR> > # > # This program and the accompanying materials > # are licensed and made available under the terms and conditions of the BSD > License > @@ -24,7 +24,7 @@ [Defines] > FILE_GUID = b1ee6c28-54aa-4d17-b705-3e28ccb27b2e > MODULE_TYPE = DXE_RUNTIME_DRIVER > VERSION_STRING = 1.0 > - LIBRARY_CLASS = UefiRuntimeLib|DXE_RUNTIME_DRIVER > DXE_SAL_DRIVER DXE_CORE DXE_DRIVER > DXE_SMM_DRIVER > + LIBRARY_CLASS = UefiRuntimeLib|DXE_RUNTIME_DRIVER > DXE_SAL_DRIVER > > CONSTRUCTOR = RuntimeDriverLibConstruct > DESTRUCTOR = RuntimeDriverLibDeconstruct > -- > 2.16.1.windows.1
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