CryptoPkg: Fix handling of &strcmp function pointers

In a couple of places, OpenSSL code uses the address of the
strcmp() function, and assigns it to another comparator function
pointer.

Unfortunately, this falls foul of the inconsistent function ABI
that we use in EDKII. We '#define strcmp AsciiStrCmp' but AsciiStrCmp
is an EFIAPI function with the Microsoft ABI. And we're assigning its
address to a non-EFIAPI function, which may well have a different ABI.

Fix this by providing an actual strcmp() function in the default ABI.
We already *had* a prototype for it in OpenSslSupport.h, which was
then superseded by the #define strcmp AsciiStrCmp.

Now, OpenSSL code *can* use &strcmp without problems.

Cc: Ting Ye <ting.ye@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
Cc: Gary Lin <glin@suse.com>
Cc: Ronald Cron <ronald.cron@arm.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: David Woodhouse <dwmw2@infradead.org>
Signed-off-by: Qin Long <qin.long@intel.com>
Reviewed-by: Ting Ye <ting.ye@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Laszlo Ersek <lersek@redhat.com>
Tested-by: Gary Lin <glin@suse.com>

1 files changed, 1 insertions, 2 deletions

diff --git a/CryptoPkg/Include/OpenSslSupport.h b/CryptoPkg/Include/OpenSslSupport.h
index e011a7cfee..e6858a94a4 100644
--- a/CryptoPkg/Include/OpenSslSupport.h
+++ b/CryptoPkg/Include/OpenSslSupport.h
@@ -1,7 +1,7 @@
 /** @file

   Root include file to support building OpenSSL Crypto Library.

 

-Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>

+Copyright (c) 2010 - 2017, 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

 which accompanies this distribution.  The full text of the license may be found at

@@ -276,7 +276,6 @@ extern FILE  *stdout;
 #define memchr(buf,ch,count)              ScanMem8(buf,(UINTN)(count),(UINT8)ch)

 #define memcmp(buf1,buf2,count)           (int)(CompareMem(buf1,buf2,(UINTN)(count)))

 #define memmove(dest,source,count)        CopyMem(dest,source,(UINTN)(count))

-#define strcmp                            AsciiStrCmp

 #define strncmp(string1,string2,count)    (int)(AsciiStrnCmp(string1,string2,(UINTN)(count)))

 #define strcpy(strDest,strSource)         AsciiStrCpyS(strDest,MAX_STRING_SIZE,strSource)

 #define strncpy(strDest,strSource,count)  AsciiStrnCpyS(strDest,MAX_STRING_SIZE,strSource,(UINTN)count)