diff --git a/eng/common/cross/toolchain.cmake b/eng/common/cross/toolchain.cmake
index eaeeab38fa1..d5dfc13504b 100644
--- a/eng/common/cross/toolchain.cmake
+++ b/eng/common/cross/toolchain.cmake
@@ -48,11 +48,13 @@ elseif(TARGET_ARCH_NAME STREQUAL "arm64")
   set(CMAKE_SYSTEM_PROCESSOR aarch64)
   if(EXISTS ${CROSS_ROOTFS}/usr/lib/gcc/aarch64-alpine-linux-musl)
     set(TOOLCHAIN "aarch64-alpine-linux-musl")
-  else()
+  elseif(LINUX)
     set(TOOLCHAIN "aarch64-linux-gnu")
-  endif()
-  if(TIZEN)
-    set(TIZEN_TOOLCHAIN "aarch64-tizen-linux-gnu/9.2.0")
+    if(TIZEN)
+      set(TIZEN_TOOLCHAIN "aarch64-tizen-linux-gnu/9.2.0")
+    endif()
+  elseif(FREEBSD)
+    set(triple "aarch64-unknown-freebsd12")
   endif()
 elseif(TARGET_ARCH_NAME STREQUAL "ppc64le")
   set(CMAKE_SYSTEM_PROCESSOR ppc64le)
@@ -66,12 +68,18 @@ elseif(TARGET_ARCH_NAME STREQUAL "x86")
   if(TIZEN)
     set(TIZEN_TOOLCHAIN "i586-tizen-linux-gnu/9.2.0")
   endif()
-elseif (FREEBSD)
-  set(CMAKE_SYSTEM_PROCESSOR "x86_64")
-  set(triple "x86_64-unknown-freebsd12")
-elseif (ILLUMOS)
-  set(CMAKE_SYSTEM_PROCESSOR "x86_64")
-  set(TOOLCHAIN "x86_64-illumos")
+elseif(TARGET_ARCH_NAME STREQUAL "x64")
+  set(CMAKE_SYSTEM_PROCESSOR x86_64)
+  if(LINUX)
+    set(TOOLCHAIN "x86_64-linux-gnu")
+    if(TIZEN)
+      set(TIZEN_TOOLCHAIN "x86_64-tizen-linux-gnu/9.2.0")
+    endif()
+  elseif(FREEBSD)
+    set(triple "x86_64-unknown-freebsd12")
+  elseif(ILLUMOS)
+    set(TOOLCHAIN "x86_64-illumos")
+  endif()
 else()
   message(FATAL_ERROR "Arch is ${TARGET_ARCH_NAME}. Only armel, arm, armv6, arm64, ppc64le, s390x and x86 are supported!")
 endif()
@@ -218,7 +226,7 @@ endif()
 
 # Specify compile options
 
-if((TARGET_ARCH_NAME MATCHES "^(arm|armv6|armel|arm64|ppc64le|s390x)$" AND NOT ANDROID) OR ILLUMOS)
+if((TARGET_ARCH_NAME MATCHES "^(arm|armv6|armel|arm64|ppc64le|s390x)$" AND NOT ANDROID AND NOT FREEBSD) OR ILLUMOS)
   set(CMAKE_C_COMPILER_TARGET ${TOOLCHAIN})
   set(CMAKE_CXX_COMPILER_TARGET ${TOOLCHAIN})
   set(CMAKE_ASM_COMPILER_TARGET ${TOOLCHAIN})
diff --git a/eng/native/configureplatform.cmake b/eng/native/configureplatform.cmake
index d21206f1f8b..5a6e65a4336 100644
--- a/eng/native/configureplatform.cmake
+++ b/eng/native/configureplatform.cmake
@@ -160,7 +160,8 @@ endif(CLR_CMAKE_HOST_OS STREQUAL Android)
 
 if(CLR_CMAKE_HOST_OS STREQUAL FreeBSD)
     set(CLR_CMAKE_HOST_UNIX 1)
-    set(CLR_CMAKE_HOST_UNIX_AMD64 1)
+    set(CLR_CMAKE_HOST_UNIX_ARM64 1)
+    set(CLR_CMAKE_HOST_AMD64 0)
     set(CLR_CMAKE_HOST_FREEBSD 1)
 endif(CLR_CMAKE_HOST_OS STREQUAL FreeBSD)
 
diff --git a/eng/native/configuretools.cmake b/eng/native/configuretools.cmake
index 6697524c659..4ab99a86db5 100644
--- a/eng/native/configuretools.cmake
+++ b/eng/native/configuretools.cmake
@@ -54,7 +54,7 @@ if(NOT WIN32 AND NOT CLR_CMAKE_TARGET_BROWSER)
       set(TOOLSET_PREFIX ${ANDROID_TOOLCHAIN_PREFIX})
     elseif(CMAKE_CROSSCOMPILING AND NOT DEFINED CLR_CROSS_COMPONENTS_BUILD AND
         CMAKE_SYSTEM_PROCESSOR MATCHES "^(armv8l|armv7l|armv6l|aarch64|arm|s390x|ppc64le)$")
-      set(TOOLSET_PREFIX "${TOOLCHAIN}-")
+      set(TOOLSET_PREFIX "llvm-")
     else()
       set(TOOLSET_PREFIX "")
     endif()
diff --git a/src/coreclr/inc/crosscomp.h b/src/coreclr/inc/crosscomp.h
index 9a78c69a342..3262391c856 100644
--- a/src/coreclr/inc/crosscomp.h
+++ b/src/coreclr/inc/crosscomp.h
@@ -551,6 +551,8 @@ typedef struct _T_KNONVOLATILE_CONTEXT_POINTERS {
 #define DAC_CS_NATIVE_DATA_SIZE 12
 #elif defined(TARGET_FREEBSD) && defined(TARGET_AMD64)
 #define DAC_CS_NATIVE_DATA_SIZE 24
+#elif defined(TARGET_FREEBSD) && defined(TARGET_ARM64)
+#define DAC_CS_NATIVE_DATA_SIZE 24
 #elif defined(TARGET_LINUX) && defined(TARGET_ARM)
 #define DAC_CS_NATIVE_DATA_SIZE 80
 #elif defined(TARGET_LINUX) && defined(TARGET_ARM64)
diff --git a/src/coreclr/pal/inc/pal.h b/src/coreclr/pal/inc/pal.h
index dd7e99c665b..444b4768727 100644
--- a/src/coreclr/pal/inc/pal.h
+++ b/src/coreclr/pal/inc/pal.h
@@ -2677,6 +2677,8 @@ PALIMPORT BOOL PALAPI PAL_VirtualUnwindOutOfProc(CONTEXT *context, KNONVOLATILE_
 #define PAL_CS_NATIVE_DATA_SIZE 12
 #elif defined(__FreeBSD__) && defined(__x86_64__)
 #define PAL_CS_NATIVE_DATA_SIZE 24
+#elif defined(__FreeBSD__) && defined(HOST_ARM64)
+#define PAL_CS_NATIVE_DATA_SIZE 24
 #elif defined(__linux__) && defined(HOST_ARM)
 #define PAL_CS_NATIVE_DATA_SIZE 80
 #elif defined(__linux__) && defined(HOST_ARM64)
diff --git a/src/coreclr/pal/src/configure.cmake b/src/coreclr/pal/src/configure.cmake
index 4f900a5555e..ba9a068c92e 100644
--- a/src/coreclr/pal/src/configure.cmake
+++ b/src/coreclr/pal/src/configure.cmake
@@ -1342,6 +1342,13 @@ elseif(CLR_CMAKE_TARGET_FREEBSD)
   set(HAS_FTRUNCATE_LENGTH_ISSUE 0)
   set(BSD_REGS_STYLE "((reg).r_##rr)")
   set(HAVE_SCHED_OTHER_ASSIGNABLE 1)
+if (CLR_CMAKE_HOST_ARCH_AMD64)
+  set(BSD_REGS_STYLE "((reg).r_##rr)")
+elseif(CLR_CMAKE_HOST_ARCH_ARM64)
+  set(BSD_REGS_STYLE "((reg).rr)")
+else()
+  message(FATAL_ERROR "Unknown FreeBSD architecture")
+endif()
 elseif(CLR_CMAKE_TARGET_NETBSD)
   set(DEADLOCK_WHEN_THREAD_IS_SUSPENDED_WHILE_BLOCKED_ON_MUTEX 0)
   set(PAL_PTRACE "ptrace((cmd), (pid), (void*)(addr), (data))")
diff --git a/src/coreclr/pal/src/exception/seh-unwind.cpp b/src/coreclr/pal/src/exception/seh-unwind.cpp
index 9fe6c61d0f8..343c1ae1048 100644
--- a/src/coreclr/pal/src/exception/seh-unwind.cpp
+++ b/src/coreclr/pal/src/exception/seh-unwind.cpp
@@ -173,6 +173,42 @@ enum
     ASSIGN_REG(R29)        \
     ASSIGN_REG(R30)        \
     ASSIGN_REG(R31)        
+#elif (defined(HOST_ARM64) && defined(TARGET_FREEBSD))
+#define ASSIGN_UNWIND_REGS \
+    ASSIGN_REG(X0) \
+    ASSIGN_REG(X1) \
+    ASSIGN_REG(X2) \
+    ASSIGN_REG(X3) \
+    ASSIGN_REG(X4) \
+    ASSIGN_REG(X5) \
+    ASSIGN_REG(X6) \
+    ASSIGN_REG(X7) \
+    ASSIGN_REG(X8) \
+    ASSIGN_REG(X9) \
+    ASSIGN_REG(X10) \
+    ASSIGN_REG(X11) \
+    ASSIGN_REG(X12) \
+    ASSIGN_REG(X13) \
+    ASSIGN_REG(X14) \
+    ASSIGN_REG(X15) \
+    ASSIGN_REG(X16) \
+    ASSIGN_REG(X17) \
+    ASSIGN_REG(X18) \
+    ASSIGN_REG(X19) \
+    ASSIGN_REG(X20) \
+    ASSIGN_REG(X21) \
+    ASSIGN_REG(X22) \
+    ASSIGN_REG(X23) \
+    ASSIGN_REG(X24) \
+    ASSIGN_REG(X25) \
+    ASSIGN_REG(X26) \
+    ASSIGN_REG(X27) \
+    ASSIGN_REG(X28) \
+    ASSIGN_REG(Lr) \
+    ASSIGN_REG(Sp) \
+    ASSIGN_REG(Pc) \
+    ASSIGN_REG(Fp) \
+    ASSIGN_REG(Cpsr)
 #else
 #error unsupported architecture
 #endif
diff --git a/src/coreclr/pal/src/include/pal/context.h b/src/coreclr/pal/src/include/pal/context.h
index fec5139fd5e..60507af185a 100644
--- a/src/coreclr/pal/src/include/pal/context.h
+++ b/src/coreclr/pal/src/include/pal/context.h
@@ -407,7 +407,59 @@ inline void *FPREG_Xstate_Ymmh(const ucontext_t *uc)
 
 #if defined(HOST_ARM64)
 
-#ifndef TARGET_OSX
+#if defined(TARGET_FREEBSD)
+
+#define MCREG_X0(mc)  (mc.mc_gpregs.gp_x[0])
+#define MCREG_X1(mc)  (mc.mc_gpregs.gp_x[1])
+#define MCREG_X2(mc)  (mc.mc_gpregs.gp_x[2])
+#define MCREG_X3(mc)  (mc.mc_gpregs.gp_x[3])
+#define MCREG_X4(mc)  (mc.mc_gpregs.gp_x[4])
+#define MCREG_X5(mc)  (mc.mc_gpregs.gp_x[5])
+#define MCREG_X6(mc)  (mc.mc_gpregs.gp_x[6])
+#define MCREG_X7(mc)  (mc.mc_gpregs.gp_x[7])
+#define MCREG_X8(mc)  (mc.mc_gpregs.gp_x[8])
+#define MCREG_X9(mc)  (mc.mc_gpregs.gp_x[9])
+#define MCREG_X10(mc) (mc.mc_gpregs.gp_x[10])
+#define MCREG_X11(mc) (mc.mc_gpregs.gp_x[11])
+#define MCREG_X12(mc) (mc.mc_gpregs.gp_x[12])
+#define MCREG_X13(mc) (mc.mc_gpregs.gp_x[13])
+#define MCREG_X14(mc) (mc.mc_gpregs.gp_x[14])
+#define MCREG_X15(mc) (mc.mc_gpregs.gp_x[15])
+#define MCREG_X16(mc) (mc.mc_gpregs.gp_x[16])
+#define MCREG_X17(mc) (mc.mc_gpregs.gp_x[17])
+#define MCREG_X18(mc) (mc.mc_gpregs.gp_x[18])
+#define MCREG_X19(mc) (mc.mc_gpregs.gp_x[19])
+#define MCREG_X20(mc) (mc.mc_gpregs.gp_x[20])
+#define MCREG_X21(mc) (mc.mc_gpregs.gp_x[21])
+#define MCREG_X22(mc) (mc.mc_gpregs.gp_x[22])
+#define MCREG_X23(mc) (mc.mc_gpregs.gp_x[23])
+#define MCREG_X24(mc) (mc.mc_gpregs.gp_x[24])
+#define MCREG_X25(mc) (mc.mc_gpregs.gp_x[25])
+#define MCREG_X26(mc) (mc.mc_gpregs.gp_x[26])
+#define MCREG_X27(mc) (mc.mc_gpregs.gp_x[27])
+#define MCREG_X28(mc) (mc.mc_gpregs.gp_x[28])
+#define MCREG_Fp(mc)  (mc.mc_gpregs.gp_x[29])
+#define MCREG_Cpsr(mc) (mc.mc_fpregs.fp_sr)
+
+#define MCREG_Lr(mc)  (mc.mc_gpregs.gp_lr)
+#define MCREG_Sp(mc)  (mc.mc_gpregs.gp_sp)
+
+//TODO: missing those on FreeBSD ?
+#define MCREG_Pc(mc)  (mc.mc_gpregs.gp_sp)
+
+inline
+struct fpregs* GetNativeSigSimdContext(native_context_t *mc)
+{
+        return &(mc->uc_mcontext.mc_fpregs);
+}
+
+inline
+const struct fpregs* GetConstNativeSigSimdContext(const native_context_t *mc)
+{
+        return GetNativeSigSimdContext(const_cast<native_context_t*>(mc));
+}
+
+#elif !defined(TARGET_OSX) // TARGET_FREEBSD
 
 #define MCREG_X0(mc)      ((mc).regs[0])
 #define MCREG_X1(mc)      ((mc).regs[1])
@@ -911,7 +963,7 @@ const VfpSigFrame* GetConstNativeSigSimdContext(const native_context_t *mc)
 #endif
 
 #ifdef HOST_64BIT
-
+#ifdef HOST_AMD64
 #define BSDREG_Rbx(reg)     BSD_REGS_STYLE(reg,RBX,rbx)
 #define BSDREG_Rcx(reg)     BSD_REGS_STYLE(reg,RCX,rcx)
 #define BSDREG_Rdx(reg)     BSD_REGS_STYLE(reg,RDX,rdx)
@@ -933,6 +985,42 @@ const VfpSigFrame* GetConstNativeSigSimdContext(const native_context_t *mc)
 #define BSDREG_R15(reg)     BSD_REGS_STYLE(reg,R15,r15)
 #define BSDREG_EFlags(reg)  BSD_REGS_STYLE(reg,RFLAGS,rflags)
 
+#elif defined(HOST_ARM64)
+#define BSDREG_X0(reg) BSD_REGS_STYLE(reg,X[0],x[0])
+#define BSDREG_X1(reg) BSD_REGS_STYLE(reg,X[1],x[1])
+#define BSDREG_X2(reg) BSD_REGS_STYLE(reg,X[2],x[2])
+#define BSDREG_X3(reg) BSD_REGS_STYLE(reg,X[3],x[3])
+#define BSDREG_X4(reg) BSD_REGS_STYLE(reg,X[4],x[4])
+#define BSDREG_X5(reg) BSD_REGS_STYLE(reg,X[5],x[5])
+#define BSDREG_X6(reg) BSD_REGS_STYLE(reg,X[6],x[6])
+#define BSDREG_X7(reg) BSD_REGS_STYLE(reg,X[7],x[7])
+#define BSDREG_X8(reg) BSD_REGS_STYLE(reg,X[8],x[8])
+#define BSDREG_X9(reg) BSD_REGS_STYLE(reg,X[9],x[9])
+#define BSDREG_X10(reg) BSD_REGS_STYLE(reg,X[10],x[10])
+#define BSDREG_X11(reg) BSD_REGS_STYLE(reg,X[11],x[11])
+#define BSDREG_X12(reg) BSD_REGS_STYLE(reg,X[12],x[12])
+#define BSDREG_X13(reg) BSD_REGS_STYLE(reg,X[13],x[13])
+#define BSDREG_X14(reg) BSD_REGS_STYLE(reg,X[14],x[14])
+#define BSDREG_X15(reg) BSD_REGS_STYLE(reg,X[15],x[15])
+#define BSDREG_X16(reg) BSD_REGS_STYLE(reg,X[16],x[16])
+#define BSDREG_X17(reg) BSD_REGS_STYLE(reg,X[17],x[17])
+#define BSDREG_X18(reg) BSD_REGS_STYLE(reg,X[18],x[18])
+#define BSDREG_X19(reg) BSD_REGS_STYLE(reg,X[19],x[19])
+#define BSDREG_X20(reg) BSD_REGS_STYLE(reg,X[20],x[20])
+#define BSDREG_X21(reg) BSD_REGS_STYLE(reg,X[21],x[21])
+#define BSDREG_X22(reg) BSD_REGS_STYLE(reg,X[22],x[22])
+#define BSDREG_X23(reg) BSD_REGS_STYLE(reg,X[23],x[23])
+#define BSDREG_X24(reg) BSD_REGS_STYLE(reg,X[24],x[24])
+#define BSDREG_X25(reg) BSD_REGS_STYLE(reg,X[25],x[25])
+#define BSDREG_X26(reg) BSD_REGS_STYLE(reg,X[26],x[26])
+#define BSDREG_X27(reg) BSD_REGS_STYLE(reg,X[27],x[27])
+#define BSDREG_X28(reg) BSD_REGS_STYLE(reg,X[28],x[28])
+#define BSDREG_Fp(reg) BSD_REGS_STYLE(reg,X[29],x[29])
+#define BSDREG_Sp(reg) BSD_REGS_STYLE(reg,Sp,sp)
+#define BSDREG_Pc(reg) BSD_REGS_STYLE(reg,Pc,pc)
+#define BSDREG_Lr(reg) BSD_REGS_STYLE(reg,Lr,lr)
+#define BSDREG_Cpsr(reg) BSD_REGS_STYLE(reg,Spsr,spsr)
+
 #else // HOST_64BIT
 
 #define BSDREG_Ebx(reg)     BSD_REGS_STYLE(reg,EBX,ebx)
@@ -948,6 +1036,7 @@ const VfpSigFrame* GetConstNativeSigSimdContext(const native_context_t *mc)
 #define BSDREG_Esp(reg)     BSD_REGS_STYLE(reg,ESP,esp)
 #define BSDREG_SegSs(reg)   BSD_REGS_STYLE(reg,SS,ss)
 
+#endif // HOST_AMD64
 #endif // HOST_64BIT
 
 #endif // HAVE_BSD_REGS_T
diff --git a/src/libraries/Microsoft.NETCore.Platforms/src/runtime.compatibility.json b/src/libraries/Microsoft.NETCore.Platforms/src/runtime.compatibility.json
index 15c8c0a7477..b2f53649fc7 100644
--- a/src/libraries/Microsoft.NETCore.Platforms/src/runtime.compatibility.json
+++ b/src/libraries/Microsoft.NETCore.Platforms/src/runtime.compatibility.json
@@ -3468,6 +3468,14 @@
     "any",
     "base"
   ],
+  "freebsd-arm64": [
+    "freebsd-arm64",
+    "freebsd",
+    "unix-arm64",
+    "unix",
+    "any",
+    "base"
+  ],
   "freebsd.12": [
     "freebsd.12",
     "freebsd",
@@ -3485,6 +3493,16 @@
     "any",
     "base"
   ],
+  "freebsd.12-arm64": [
+    "freebsd.12-arm64",
+    "freebsd.12",
+    "freebsd-arm64",
+    "freebsd",
+    "unix-arm64",
+    "unix",
+    "any",
+    "base"
+  ],
   "freebsd.13": [
     "freebsd.13",
     "freebsd.12",
@@ -3505,6 +3523,18 @@
     "any",
     "base"
   ],
+  "freebsd.13-arm64": [
+    "freebsd.13-arm64",
+    "freebsd.13",
+    "freebsd.12-arm64",
+    "freebsd.12",
+    "freebsd-arm64",
+    "freebsd",
+    "unix-arm64",
+    "unix",
+    "any",
+    "base"
+  ],
   "gentoo": [
     "gentoo",
     "linux",
diff --git a/src/libraries/Microsoft.NETCore.Platforms/src/runtime.json b/src/libraries/Microsoft.NETCore.Platforms/src/runtime.json
index 050ce1e4e8c..105e8f41e52 100644
--- a/src/libraries/Microsoft.NETCore.Platforms/src/runtime.json
+++ b/src/libraries/Microsoft.NETCore.Platforms/src/runtime.json
@@ -1226,6 +1226,12 @@
         "unix-x64"
       ]
     },
+    "freebsd-arm64": {
+      "#import": [
+        "freebsd",
+        "unix-arm64"
+      ]
+    },
     "freebsd.12": {
       "#import": [
         "freebsd"
@@ -1237,6 +1243,12 @@
         "freebsd-x64"
       ]
     },
+    "freebsd.12-arm64": {
+      "#import": [
+        "freebsd.12",
+        "freebsd-arm64"
+      ]
+    },
     "freebsd.13": {
       "#import": [
         "freebsd.12"
@@ -1248,6 +1260,12 @@
         "freebsd.12-x64"
       ]
     },
+    "freebsd.13-arm64": {
+      "#import": [
+        "freebsd.13",
+        "freebsd.12-arm64"
+      ]
+    },
     "gentoo": {
       "#import": [
         "linux"
diff --git a/src/libraries/Microsoft.NETCore.Platforms/src/runtimeGroups.props b/src/libraries/Microsoft.NETCore.Platforms/src/runtimeGroups.props
index 1b10a2604af..db6580cab7b 100644
--- a/src/libraries/Microsoft.NETCore.Platforms/src/runtimeGroups.props
+++ b/src/libraries/Microsoft.NETCore.Platforms/src/runtimeGroups.props
@@ -178,7 +178,7 @@
 
     <RuntimeGroup Include="freebsd">
       <Parent>unix</Parent>
-      <Architectures>x64</Architectures>
+      <Architectures>x64;arm64</Architectures>
       <Versions>12;13</Versions>
     </RuntimeGroup>