From: Long Qin <qin.long@intel.com>
To: edk2-devel@lists.01.org
Cc: ting.ye@intel.com, hao.a.wu@intel.com, feng.tian@intel.com,
eric.dong@intel.com, lersek@redhat.com,
Qin Long <qin.long@intel.com>
Subject: [PATCH v2 2/4] CryptoPkg: Fix possible unresolved external symbol issue.
Date: Sat, 1 Apr 2017 13:38:32 +0800 [thread overview]
Message-ID: <20170401053834.12856-3-qin.long@intel.com> (raw)
In-Reply-To: <20170401053834.12856-1-qin.long@intel.com>
From: Qin Long <qin.long@intel.com>
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>
---
CryptoPkg/Include/CrtLibSupport.h | 1 +
CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c | 10 +++++++++-
2 files changed, 10 insertions(+), 1 deletion(-)
diff --git a/CryptoPkg/Include/CrtLibSupport.h b/CryptoPkg/Include/CrtLibSupport.h
index ddf7784a37..7f1ec12302 100644
--- a/CryptoPkg/Include/CrtLibSupport.h
+++ b/CryptoPkg/Include/CrtLibSupport.h
@@ -133,6 +133,7 @@ void *malloc (size_t);
void *realloc (void *, size_t);
void free (void *);
void *memset (void *, int, size_t);
+int memcmp (const void *, const void *, size_t);
int isdigit (int);
int isspace (int);
int isxdigit (int);
diff --git a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
index e8a76d07ff..bf485d680d 100644
--- a/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
+++ b/CryptoPkg/Library/IntrinsicLib/MemoryIntrinsics.c
@@ -17,12 +17,14 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
#include <Library/BaseMemoryLib.h>
#include <Library/BaseLib.h>
+typedef UINTN size_t;
+
/* OpenSSL will use floating point support, and C compiler produces the _fltused
symbol by default. Simply define this symbol here to satisfy the linker. */
int _fltused = 1;
/* 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
@@ -46,6 +48,12 @@ void * memset (void *dest, char ch, unsigned int count)
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)
{
return (int)AsciiStrCmp(s1, s2);
--
2.12.2.windows.1
next prev parent reply other threads:[~2017-04-01 5:40 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2017-04-01 5:38 [PATCH v2 0/4] Resolving Some CryptoPkg Build Issues Long Qin
2017-04-01 5:38 ` [PATCH v2 1/4] CryptoPkg/OpensslLib: Suppress extra build warnings in openssl source Long Qin
2017-04-01 5:38 ` Long Qin [this message]
2017-04-01 5:38 ` [PATCH v2 3/4] CryptoPkg/BaseCryptLib: Adding NULL checking in time() wrapper Long Qin
2017-04-01 5:38 ` [PATCH v2 4/4] CryptoPkg: One workaround to resolve potential build issue Long Qin
2017-04-03 16:45 ` [PATCH v2 0/4] Resolving Some CryptoPkg Build Issues Laszlo Ersek
2017-04-06 8:54 ` Laszlo Ersek
2017-04-06 11:26 ` Long, Qin
2017-04-06 12:56 ` Laszlo Ersek
2017-04-06 14:17 ` Long, Qin
2017-04-06 17:17 ` Laszlo Ersek
2017-04-07 10:17 ` Laszlo Ersek
2017-04-07 13:22 ` Long, Qin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-list from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20170401053834.12856-3-qin.long@intel.com \
--to=devel@edk2.groups.io \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox