diff --git a/CryptoPkg/CryptoPkg.dsc b/CryptoPkg/CryptoPkg.dsc
index 8df9e301d6..f88b4f87d1 100644
--- a/CryptoPkg/CryptoPkg.dsc
+++ b/CryptoPkg/CryptoPkg.dsc
@@ -23,7 +23,7 @@
   PLATFORM_VERSION               = 0.91
   DSC_SPECIFICATION              = 0x00010005
   OUTPUT_DIRECTORY               = Build/CryptoPkg
-  SUPPORTED_ARCHITECTURES        = IA32|X64|IPF|EBC
+  SUPPORTED_ARCHITECTURES        = IA32|X64|IPF|EBC|ARM
   BUILD_TARGETS                  = DEBUG|RELEASE
   SKUID_IDENTIFIER               = DEFAULT
 
@@ -50,6 +50,14 @@
   IntrinsicLib|CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
   OpensslLib|CryptoPkg/Library/OpensslLib/OpensslLib.inf
 
+[LibraryClasses.ARM]
+  #
+  # It is not possible to prevent the ARM compiler for generic intrinsic functions.
+  # This library provides the instrinsic functions generate by a given compiler.
+  # [LibraryClasses.ARM] and NULL mean link this library into all ARM images.
+  #
+  NULL|ArmPkg/Library/CompilerIntrinsicsLib/CompilerIntrinsicsLib.inf
+
 [LibraryClasses.common.PEIM]
   BaseCryptLib|CryptoPkg/Library/BaseCryptLib/PeiCryptLib.inf
 
diff --git a/CryptoPkg/Include/OpenSslSupport.h b/CryptoPkg/Include/OpenSslSupport.h
index 571511582e..258854b101 100644
--- a/CryptoPkg/Include/OpenSslSupport.h
+++ b/CryptoPkg/Include/OpenSslSupport.h
@@ -30,10 +30,18 @@ typedef VOID  *FILE;
 //
 // Map all va_xxxx elements to VA_xxx defined in MdePkg/Include/Base.h
 //
+#if !defined(__CC_ARM) // if va_list is not already defined
 #define va_list   VA_LIST
 #define va_arg    VA_ARG
 #define va_start  VA_START
 #define va_end    VA_END
+#else // __CC_ARM
+#define va_start(Marker, Parameter)   __va_start(Marker, Parameter)
+#define va_arg(Marker, TYPE)          __va_arg(Marker, TYPE)
+#define va_end(Marker)                ((void)0)
+#endif
+
+
 
 //
 // #defines from EFI Application Toolkit required to buiild Open SSL
@@ -211,9 +219,9 @@ __sighandler_t *signal     (int, __sighandler_t *);
 //
 // Global variables from EFI Application Toolkit required to buiild Open SSL
 //
-FILE  *stderr;
-FILE  *stdin;
-FILE  *stdout;
+static FILE  *stderr;
+static FILE  *stdin;
+static FILE  *stdout;
 
 //
 // Macros that directly map functions to BaseLib, BaseMemoryLib, and DebugLib functions
diff --git a/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c b/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
index b9daaee0bc..46574dc8f5 100644
--- a/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
+++ b/CryptoPkg/Library/BaseCryptLib/SysCall/CrtWrapper.c
@@ -15,6 +15,8 @@ WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
 
 #include <OpenSslSupport.h>
 
+int errno = 0;
+
 typedef
 INTN
 (*SORT_COMPARE)(
@@ -298,3 +300,113 @@ void *UI_OpenSSL(void)
 {
   return NULL;
 }
+
+int X509_load_cert_file (VOID *ctx, const char *file, int type)
+{
+  return 0;
+}
+
+int X509_load_crl_file (VOID *ctx, const char *file, int type)
+{
+  return 0;
+}
+
+int chmod (const char *c, mode_t m)
+{
+  return -1;
+}
+
+int close (int f)
+{
+  return -1;
+}
+
+void closelog (void)
+{
+
+}
+
+void exit (int e)
+{
+
+}
+
+int fclose (FILE *f)
+{
+  return 0;
+}
+
+FILE *fopen (const char *c, const char *m)
+{
+  return NULL;
+}
+
+size_t fread (void *b, size_t c, size_t i, FILE *f)
+{
+  return 0;
+}
+
+int fprintf (FILE *f, const char *s, ...)
+{
+  return 0;
+}
+
+uid_t getuid (void)
+{
+  return 0;
+}
+
+uid_t geteuid (void)
+{
+  return 0;
+}
+
+gid_t getgid (void)
+{
+  return 0;
+}
+
+gid_t getegid (void)
+{
+  return 0;
+}
+
+off_t lseek (int a, off_t o, int d)
+{
+  return 0;
+}
+
+void openlog (const char *c, int a, int b)
+{
+
+}
+
+ssize_t read (int f, void *b, size_t c)
+{
+  return 0;
+}
+
+int stat (const char *c, struct stat *s)
+{
+  return -1;
+}
+
+int strcasecmp (const char *c, const char *s)
+{
+  return 0;
+}
+
+int strncasecmp (const char *c, const char *s, size_t l)
+{
+  return 0;
+}
+
+void syslog (int a, const char *c, ...)
+{
+
+}
+
+ssize_t write (int f, const void *b, size_t l)
+{
+  return 0;
+}
diff --git a/CryptoPkg/Library/OpensslLib/OpensslLib.inf b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
index 27547f3a38..7968275358 100644
--- a/CryptoPkg/Library/OpensslLib/OpensslLib.inf
+++ b/CryptoPkg/Library/OpensslLib/OpensslLib.inf
@@ -51,7 +51,7 @@
 #
   
 #
-#  VALID_ARCHITECTURES           = IA32 X64 IPF
+#  VALID_ARCHITECTURES           = IA32 X64 IPF ARM
 #
 
 [Sources]
@@ -599,3 +599,7 @@
    MSFT:RELEASE_*_IPF_CC_FLAGS            == /nologo /c /WX /GS- /X /EHs-c- /GR- /Gy /Os /GL /FIAutoGen.h /QIPF_fr32 -U_WIN32 -U_WIN64 -U_MSC_VER $(OPENSSL_FLAGS) $(OPENSSL_EXFLAGS) /w
   INTEL:*_*_*_CC_FLAGS                    = -U_WIN32 -U_WIN64 -U_MSC_VER -U__ICC $(OPENSSL_FLAGS) $(OPENSSL_EXFLAGS) /w
     GCC:*_*_*_CC_FLAGS                    = -U_WIN32 -U_WIN64 $(OPENSSL_FLAGS) $(OPENSSL_EXFLAGS) -w
+   RVCT:DEBUG_*_*_CC_FLAGS                = $(OPENSSL_FLAGS) $(OPENSSL_EXFLAGS) --library_interface=aeabi_clib99 --fpu=vfpv3
+   RVCT:RELEASE_*_*_CC_FLAGS              = $(OPENSSL_FLAGS) $(OPENSSL_EXFLAGS) --library_interface=aeabi_clib99 --fpu=vfpv3
+
+