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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then superseded by the #define strcmp AsciiStrCmp.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>
This commit is contained in:
Qin Long 2017-03-23 20:09:17 +08:00
parent d2cd3b6830
commit 420e508397
2 changed files with 8 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
CryptoPkg/Include/OpenSslSupport.h
View File

@ -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)

8
CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
View File

@ -2,7 +2,7 @@
Intrinsic Memory Routines Wrapper Implementation for OpenSSL-based
Cryptographic Library.
Copyright (c) 2010 - 2014, 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
@ -15,6 +15,7 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Base.h>
#include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h>
/* OpenSSL will use floating point support, and C compiler produces the _fltused
symbol by default. Simply define this symbol here to satisfy the linker. */
@ -44,3 +45,8 @@ void * memset (void *dest, char ch, unsigned int count)
return dest;
}
int strcmp (const char *s1, const char *s2)
{
return (int)AsciiStrCmp(s1, s2);
}