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then superseded by the #define strcmp AsciiStrCmp.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>

diff --git a/CryptoPkg/Include/OpenSslSupport.h b/CryptoPkg/Include/OpenSslSupport.h
index e011a7cfee54d0b8136cdf043ddf5eb9e5d4b334..e6858a94a484f49c6ede8943c7185ee918d8de84 100644 (file)
--- a/CryptoPkg/Include/OpenSslSupport.h
+++ b/CryptoPkg/Include/OpenSslSupport.h
@@ -1,7 +1,7 @@
 /** @file\r
   Root include file to support building OpenSSL Crypto Library.\r
 \r
-Copyright (c) 2010 - 2016, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -276,7 +276,6 @@ extern FILE  *stdout;
 #define memchr(buf,ch,count)              ScanMem8(buf,(UINTN)(count),(UINT8)ch)\r
 #define memcmp(buf1,buf2,count)           (int)(CompareMem(buf1,buf2,(UINTN)(count)))\r
 #define memmove(dest,source,count)        CopyMem(dest,source,(UINTN)(count))\r
-#define strcmp                            AsciiStrCmp\r
 #define strncmp(string1,string2,count)    (int)(AsciiStrnCmp(string1,string2,(UINTN)(count)))\r
 #define strcpy(strDest,strSource)         AsciiStrCpyS(strDest,MAX_STRING_SIZE,strSource)\r
 #define strncpy(strDest,strSource,count)  AsciiStrnCpyS(strDest,MAX_STRING_SIZE,strSource,(UINTN)count)\r

diff --git a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
index 9d6867ebce2675df600b6ef5a4152769387f32eb..e8a76d07ff4dc4f0f804e4011578e45b70acbbbc 100644 (file)
--- a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
+++ b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
@@ -2,7 +2,7 @@
   Intrinsic Memory Routines Wrapper Implementation for OpenSSL-based\r
   Cryptographic Library.\r
 \r
-Copyright (c) 2010 - 2014, Intel Corporation. All rights reserved.<BR>\r
+Copyright (c) 2010 - 2017, Intel Corporation. All rights reserved.<BR>\r
 This program and the accompanying materials\r
 are licensed and made available under the terms and conditions of the BSD License\r
 which accompanies this distribution.  The full text of the license may be found at\r
@@ -15,6 +15,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 \r
 #include <Base.h>\r
 #include <Library/BaseMemoryLib.h>\r
+#include <Library/BaseLib.h>\r
 \r
 /* OpenSSL will use floating point support, and C compiler produces the _fltused\r
    symbol by default. Simply define this symbol here to satisfy the linker. */\r
@@ -44,3 +45,8 @@ void * memset (void *dest, char ch, unsigned int count)
   \r
   return dest;\r
 }\r
+\r
+int strcmp (const char *s1, const char *s2)\r
+{\r
+  return (int)AsciiStrCmp(s1, s2);\r
+}\r