The RiscV toolchain doesn't provide __ctzdi2 implementation when
compiled with -nostdlib that needed by openssl library when EC
enabled. So adding the simple implementation of __ctzdi2.
Forcing to use CopyMem of EDK2 as builtin memcpy disabled for RiscV
with -fno-builtin-memcpy flag.
Signed-off-by: Tuan Phan <tp...@ventanamicro.com>
---
.../Library/IntrinsicLib/CompilerHelper.c | 41 +++++++++++++++++++
.../Library/IntrinsicLib/IntrinsicLib.inf | 6 ++-
2 files changed, 46 insertions(+), 1 deletion(-)
create mode 100644 CryptoPkg/Library/IntrinsicLib/CompilerHelper.c
diff --git a/CryptoPkg/Library/IntrinsicLib/CompilerHelper.c
b/CryptoPkg/Library/IntrinsicLib/CompilerHelper.c
new file mode 100644
index 000000000000..9e700a11ed17
--- /dev/null
+++ b/CryptoPkg/Library/IntrinsicLib/CompilerHelper.c
@@ -0,0 +1,41 @@
+/** @file
+ Implement functions that not available when compiled with -nostdlib flag.
+
+ SPDX-License-Identifier: BSD-2-Clause-Patent
+
+**/
+
+unsigned int
+__ctzdi2 (unsigned long long x)
+{
+ unsigned int ret = 0;
+
+ if (!x) {
+ return 64;
+ }
+ if (!(x & 0xffffffff)) {
+ x >>= 32;
+ ret |= 32;
+ }
+ if (!(x & 0xffff)) {
+ x >>= 16;
+ ret |= 16;
+ }
+ if (!(x & 0xff)) {
+ x >>= 8;
+ ret |= 8;
+ }
+ if (!(x & 0xf)) {
+ x >>= 4;
+ ret |= 4;
+ }
+ if (!(x & 0x3)) {
+ x >>= 2;
+ ret |= 2;
+ }
+ if (!(x & 0x1)) {
+ x >>= 1;
+ ret |= 1;
+ }
+ return ret;
+}
diff --git a/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
b/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
index 86e74b57b109..6796b39b07cf 100644
--- a/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
+++ b/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
@@ -18,7 +18,7 @@
#
# The following information is for reference only and not required by the
build tools.
#
-# VALID_ARCHITECTURES = IA32 X64
+# VALID_ARCHITECTURES = IA32 X64 RISCV64
#
[Sources]
@@ -43,6 +43,10 @@
[Sources.X64]
CopyMem.c
+[Sources.RISCV64]
+ CopyMem.c
+ CompilerHelper.c
+
[Packages]
MdePkg/MdePkg.dec
--
2.25.1
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