From 7599c95dd79251d0337860a407b1e049a29cc0e6 Mon Sep 17 00:00:00 2001
From: mikael <mikael@FreeBSD.org>
Date: Sun, 16 May 2021 11:10:24 +0200
Subject: [PATCH] Fix build on FreeBSD aarch64

---
 src/backend/cpu/platform/BasicCpuInfo_arm.cpp | 13 +++++++++++--
 1 file changed, 11 insertions(+), 2 deletions(-)

diff --git a/src/backend/cpu/platform/BasicCpuInfo_arm.cpp b/src/backend/cpu/platform/BasicCpuInfo_arm.cpp
index 318928cd..4eb9864a 100644
--- a/src/backend/cpu/platform/BasicCpuInfo_arm.cpp
+++ b/src/backend/cpu/platform/BasicCpuInfo_arm.cpp
@@ -26,11 +26,14 @@
 #include <thread>
 
 
-#if __ARM_FEATURE_CRYPTO && !defined(__APPLE__)
+#if __ARM_FEATURE_CRYPTO && !(defined(__APPLE__) || defined(__FreeBSD__))
 #   include <sys/auxv.h>
 #   include <asm/hwcap.h>
 #endif
 
+#if defined (__FreeBSD__)
+#include <machine/armreg.h>
+#endif
 
 #include "backend/cpu/platform/BasicCpuInfo.h"
 #include "3rdparty/rapidjson/document.h"
@@ -62,8 +65,14 @@ xmrig::BasicCpuInfo::BasicCpuInfo() :
 #   endif
 
 #   if __ARM_FEATURE_CRYPTO
-#   if !defined(__APPLE__)
+#   if !(defined(__APPLE__) || defined(__FreeBSD__))
     m_flags.set(FLAG_AES, getauxval(AT_HWCAP) & HWCAP_AES);
+#   elif defined(__FreeBSD__)
+    uint64_t id_aa64isar0;
+    id_aa64isar0 = READ_SPECIALREG(id_aa64isar0_el1);
+    if (ID_AA64ISAR0_AES_VAL(id_aa64isar0) == ID_AA64ISAR0_AES_BASE) {
+        m_flags.set(FLAG_AES, true);
+    }
 #   else
     m_flags.set(FLAG_AES, true);
 #   endif