Do you cover IA32 & X64 arch both, and verify Ovmf boot? > -----Original Message----- > From: Lu, XiaoyuX > Sent: Wednesday, June 5, 2019 3:35 PM > To: Gao, Liming <liming....@intel.com>; devel@edk2.groups.io > Cc: Bi, Dandan <dandan...@intel.com>; Wang, Jian J <jian.j.w...@intel.com> > Subject: RE: [edk2-devel] [PATCH v1 1/1] CryptoPkg/IntrinsicLib: Fix CLANG38 > IA32 build problem > > Liming, > > > -----Original Message----- > > From: Gao, Liming > > Sent: Wednesday, June 5, 2019 3:28 PM > > To: Lu, XiaoyuX <xiaoyux...@intel.com>; devel@edk2.groups.io > > Cc: Bi, Dandan <dandan...@intel.com>; Wang, Jian J <jian.j.w...@intel.com> > > Subject: RE: [edk2-devel] [PATCH v1 1/1] CryptoPkg/IntrinsicLib: Fix > > CLANG38 IA32 build problem > > > > Xiaoyu: > > > > > -----Original Message----- > > > From: Lu, XiaoyuX > > > Sent: Wednesday, June 5, 2019 2:34 PM > > > To: Gao, Liming <liming....@intel.com>; devel@edk2.groups.io > > > Cc: Bi, Dandan <dandan...@intel.com>; Wang, Jian J > > <jian.j.w...@intel.com> > > > Subject: RE: [edk2-devel] [PATCH v1 1/1] CryptoPkg/IntrinsicLib: Fix > > CLANG38 IA32 build problem > > > > > > Hi Liming, > > > > > > > -----Original Message----- > > > > From: Gao, Liming > > > > Sent: Wednesday, June 5, 2019 1:57 PM > > > > To: devel@edk2.groups.io; Lu, XiaoyuX <xiaoyux...@intel.com> > > > > Cc: Bi, Dandan <dandan...@intel.com>; Wang, Jian J > > <jian.j.w...@intel.com> > > > > Subject: RE: [edk2-devel] [PATCH v1 1/1] CryptoPkg/IntrinsicLib: Fix > > > > CLANG38 IA32 build problem > > > > > > > > Xiaoyu: > > > > > > > > >-----Original Message----- > > > > >From: devel@edk2.groups.io [mailto:devel@edk2.groups.io] On Behalf > > Of > > > > >Xiaoyu Lu > > > > >Sent: Wednesday, June 05, 2019 1:25 PM > > > > >To: devel@edk2.groups.io > > > > >Cc: Lu, XiaoyuX <xiaoyux...@intel.com>; Bi, Dandan > > > > <dandan...@intel.com>; > > > > >Wang, Jian J <jian.j.w...@intel.com> > > > > >Subject: [edk2-devel] [PATCH v1 1/1] CryptoPkg/IntrinsicLib: Fix > > CLANG38 > > > > >IA32 build problem > > > > > > > > > >When use clang-3.8 to build the NetworkPkg, compiler optimization > > > > >may use memcpy for memory copy. For example: > > > > > > > > > > CryptoPkg/Library/OpensslLib/openssl/ssl/ssl_rsa.c:918: undefined > > > > > reference to `memcpy'` > > > > > > > > > >Compiler optimization is sophisticated, but we can work around it > > > > >use __attribute__((__used__)) to informs the compiler that symbol > > > > >should be retained in the object file, even if it may be > > > > >unreferenced. > > > > > > > > > >Cc: Jian J Wang <jian.j.w...@intel.com> > > > > >Cc: Dandan Bi <dandan...@intel.com> > > > > >Signed-off-by: Xiaoyu Lu <xiaoyux...@intel.com> > > > > >--- > > > > > CryptoPkg/Library/IntrinsicLib/CopyMem.c | 13 +++++++++++++ > > > > > 1 file changed, 13 insertions(+) > > > > > > > > > >diff --git a/CryptoPkg/Library/IntrinsicLib/CopyMem.c > > > > >b/CryptoPkg/Library/IntrinsicLib/CopyMem.c > > > > >index e29b4918d200..7faf5a34d8c1 100644 > > > > >--- a/CryptoPkg/Library/IntrinsicLib/CopyMem.c > > > > >+++ b/CryptoPkg/Library/IntrinsicLib/CopyMem.c > > > > >@@ -10,8 +10,21 @@ SPDX-License-Identifier: BSD-2-Clause-Patent > > > > > #include <Base.h> > > > > > #include <Library/BaseMemoryLib.h> > > > > > > > > > >+#if defined(__clang__) && !defined(__APPLE__) > > > > > > > > So, this change is only for CLANG tool chain. > > > > > > > > >+ > > > > >+/* Copies bytes between buffers */ > > > > >+static __attribute__((__used__)) > > > > > > > > What purpose for static? > > > > > > > > > > Because I want __memcpy only use in this file scope. > > > > > > > >+void * __memcpy (void *dest, const void *src, unsigned int count) > > > > >+{ > > > > >+ return CopyMem (dest, src, (UINTN)count); > > > > >+} > > > > >+__attribute__((__alias__("__memcpy"))) > > > > >+void * memcpy (void *dest, const void *src, unsigned int count); > > > > > > > > __memcpy is IA32 Intrinsic API, memcpy is X64 Intrinsic API, right? > > > > > > > > > > __memcpy isn't IA32 Intrinsic API, only memcpy is intrinsic API for both > > IA32 and X64. > > > > > > The reason I alias memcpy and use __attribute__((__used__)) is let > > compiler retain symbol in object file, > > > So it can link correct. > > > > > > Is this correct? > > > > > > > Make sense. What test have been done by you? Build pass and Boot pass? > > > > Build pass and BaseCryptLib functions test pass. > I don't test http boot. > > Thanks, > Xiaoyu > > > > > Thanks > > > > Liming > > > > > > > >+ > > > > >+#else > > > > > /* Copies bytes between buffers */ > > > > > void * memcpy (void *dest, const void *src, unsigned int count) > > > > > { > > > > > return CopyMem (dest, src, (UINTN)count); > > > > > } > > > > >+#endif > > > > >-- > > > > >2.7.4 > > > > > > > > > > > > > > >
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