tyler.durden/audk
1
0
Fork 0
mirror of https://github.com/acidanthera/audk.git synced 2025-07-22 21:24:35 +02:00
Code Issues Packages Projects Releases Wiki Activity

CryptoPkg: Fix possible unresolved external symbol issue.

Browse Source 
The compiler (visual studio) may optimize some explicit strcmp call
in openssl source to use the intrinsic memcmp call.
In CrtLibSupport.h, we just use #define to mapping memcmp to
CompareMem API. So in Link phase, this kind of intrinsic optimization
will cause the "unresolved external symbol" error. For example:
    OpensslLib.lib(v3_utl.obj) : error LNK2001:
                               unresolved external symbol _memcmp

This patch will keep the memcmp mapping, and provide extra Intrinsic
memcmp wrapper to satisfy the symbol link.

Cc: Ting Ye <ting.ye@intel.com>
Cc: Feng Tian <feng.tian@intel.com>
Cc: Laszlo Ersek <lersek@redhat.com>
Contributed-under: TianoCore Contribution Agreement 1.0
Signed-off-by: Qin Long <qin.long@intel.com>
Reviewed-by: Laszlo Ersek <lersek@redhat.com>
This commit is contained in:
Qin Long 2017-04-01 11:30:55 +08:00
parent 81bec7aa52
commit 5d7a1d63c0
2 changed files with 10 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
CryptoPkg/Library/Include/CrtLibSupport.h
View File

@ -133,6 +133,7 @@ void *malloc (size_t);
void *realloc (void *, size_t); void *realloc (void *, size_t);
void free (void *); void free (void *);
void *memset (void *, int, size_t); void *memset (void *, int, size_t);
int memcmp (const void *, const void *, size_t);
int isdigit (int); int isdigit (int);
int isspace (int); int isspace (int);
int isxdigit (int); int isxdigit (int);

10
CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
View File

@ -17,12 +17,14 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Library/BaseMemoryLib.h> #include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h> #include <Library/BaseLib.h>
typedef UINTN size_t;
/* OpenSSL will use floating point support, and C compiler produces the _fltused /* OpenSSL will use floating point support, and C compiler produces the _fltused
symbol by default. Simply define this symbol here to satisfy the linker. */ symbol by default. Simply define this symbol here to satisfy the linker. */
int _fltused = 1; int _fltused = 1;
/* Sets buffers to a specified character */ /* Sets buffers to a specified character */
void * memset (void *dest, char ch, unsigned int count) void * memset (void *dest, char ch, size_t count)
{ {
// //
// NOTE: Here we use one base implementation for memset, instead of the direct // NOTE: Here we use one base implementation for memset, instead of the direct
@ -46,6 +48,12 @@ void * memset (void *dest, char ch, unsigned int count)
return dest; return dest;
} }
/* Compare bytes in two buffers. */
int memcmp (const void *buf1, const void *buf2, size_t count)
{
return (int)CompareMem(buf1, buf2, count);
}
int strcmp (const char *s1, const char *s2) int strcmp (const char *s1, const char *s2)
{ {
return (int)AsciiStrCmp(s1, s2); return (int)AsciiStrCmp(s1, s2);