diff --git a/CMakeLists.txt b/CMakeLists.txt
index 4c54ddeef6b..d97a53b5920 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -53,7 +53,8 @@ else(NOT CHAKRACORE_BUILD_SH)
 endif(NOT CHAKRACORE_BUILD_SH)
 
 if(CC_USES_SYSTEM_ARCH_SH OR NOT CHAKRACORE_BUILD_SH)
-    if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64")
+    if(CMAKE_SYSTEM_PROCESSOR STREQUAL "x86_64"
+       OR CMAKE_SYSTEM_PROCESSOR STREQUAL "amd64")
         set(CC_TARGETS_AMD64_SH 1)
     elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL "armv7l")
         set(CC_TARGETS_ARM_SH 1)
@@ -136,6 +137,8 @@ elseif(CMAKE_SYSTEM_NAME STREQUAL Linux)
     set(CC_TARGET_OS_LINUX 1)
 elseif(CMAKE_SYSTEM_NAME STREQUAL Darwin)
     set(CC_TARGET_OS_OSX 1)
+elseif(CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
+    set(CC_TARGET_OS_FREEBSD 1)
 endif()
 
 if (ENABLE_CC_XPLAT_TRACE_SH)
@@ -193,6 +196,12 @@ if(EMBED_ICU)
     # Keep consistent with what ICU download script used to print
     message("Note: ICU installation and use is subject to it's publisher's licensing terms")
 
+    if (CC_TARGET_OS_FREEBSD)
+        # FreeBSD calls GNU make 'gmake'
+        find_program(MAKE_PROGRAM "gmake" REQUIRED)
+    else()
+        set(MAKE_PROGRAM "make")
+    endif()
     set(ICU_PREFIX ${CMAKE_CURRENT_SOURCE_DIR}/deps/thirdparty/icu)
     set(ICU_DOWNLOAD_DIR ${ICU_PREFIX}/download)
     set(ICU_SOURCE_DIR ${ICU_PREFIX}/stage)
@@ -216,8 +225,8 @@ if(EMBED_ICU)
         URL https://github.com/unicode-org/icu/releases/download/release-63-2/icu4c-63_2-src.tgz
         URL_HASH SHA512=5fa9092efd8d6da6dfc8d498e4026167fda43423eaafc754d1789cf8fd4f6e76377878ebcaa32e14f314836136b764873511a93bfbcc5419b758841cc6df8f32
         CONFIGURE_COMMAND ${ICU_SOURCE_DIR}/source/configure --prefix=${ICU_PREFIX} --with-data-packaging=static --enable-static --disable-shared --with-library-bits=64 --disable-icuio --disable-layout --disable-tests --disable-samples
-        BUILD_COMMAND make STATICCFLAGS="-fPIC" STATICCXXFLAGS="-fPIC" STATICCPPFLAGS="-DPIC"
-        INSTALL_COMMAND make install
+        BUILD_COMMAND ${MAKE_PROGRAM} STATICCFLAGS="-fPIC" STATICCXXFLAGS="-fPIC" STATICCPPFLAGS="-DPIC"
+        INSTALL_COMMAND ${MAKE_PROGRAM} install
         BYPRODUCTS ${ICU_LIBRARIES}
     )
 elseif(ICU_INCLUDE_PATH)
@@ -354,6 +363,11 @@ elseif(CC_TARGET_OS_OSX)
         message(WARNING "-- !! macOS Deployment Target was set to $ENV{MACOSX_DEPLOYMENT_TARGET}. Using it as is.")
       endif()
     endif()
+elseif(CC_TARGET_OS_FREEBSD)
+    add_definitions(
+        -DPLATFORM_UNIX
+    )
+    # TODO?
 else()
     message(FATAL_ERROR "Unsupported OS: ${CMAKE_SYSTEM_NAME}")
 endif()
diff --git a/bin/GCStress/CMakeLists.txt b/bin/GCStress/CMakeLists.txt
index 8a6d31ffe3d..1be6a0560ad 100644
--- a/bin/GCStress/CMakeLists.txt
+++ b/bin/GCStress/CMakeLists.txt
@@ -45,4 +45,16 @@ elseif(NOT CC_TARGET_OS_ANDROID)
     )
 endif()
 
+if(CC_TARGET_OS_FREEBSD)
+  if(CMAKE_BUILD_TYPE STREQUAL Debug)
+    set(lib_target "${lib_target}"
+      "-lexecinfo"
+      )
+  endif()
+  set(lib_target "${lib_target}"
+    "-L/usr/local/lib"
+    "-lintl"
+    )
+endif()
+
 target_link_libraries (GCStress ${lib_target})
diff --git a/bin/ch/CMakeLists.txt b/bin/ch/CMakeLists.txt
index 012978877ff..1bb17dca9f1 100644
--- a/bin/ch/CMakeLists.txt
+++ b/bin/ch/CMakeLists.txt
@@ -119,6 +119,14 @@ elseif(CC_TARGET_OS_OSX)
   endif()
 endif()
 
+if(CC_TARGET_OS_FREEBSD)
+  set(lib_target "${lib_target}"
+    "-L/usr/local/lib"
+    "-lintl"
+    "-lsysinfo"
+    )
+endif()
+
 target_link_libraries (ch
   ${lib_target}
   ${CC_LTO_ENABLED}
diff --git a/bin/ch/ch.cpp b/bin/ch/ch.cpp
index 8c5b4a4e20a..76058cd6c60 100644
--- a/bin/ch/ch.cpp
+++ b/bin/ch/ch.cpp
@@ -13,7 +13,7 @@
 #include <pthread.h>
 #endif
 
-#ifdef __linux__
+#if defined(__linux__) || defined(__FreeBSD__)
 #include <sys/sysinfo.h>
 #elif defined(__APPLE__)
 #include <sys/sysctl.h>
@@ -543,7 +543,7 @@ static HRESULT CreateRuntime(JsRuntimeHandle *runtime)
     // Additionally, we can probably do better than just limit to the physical memory
     // size
 
-#if defined(__APPLE__) || defined(__linux__)
+#if defined(__APPLE__) || defined(__linux__) || defined(__FreeBSD__)
     size_t memoryLimit;
 #ifdef __APPLE__
     int totalRamHW[] = { CTL_HW, HW_MEMSIZE };
diff --git a/lib/Common/Common/ByteSwap.h b/lib/Common/Common/ByteSwap.h
index b9b1894f7e2..70d6650f62e 100644
--- a/lib/Common/Common/ByteSwap.h
+++ b/lib/Common/Common/ByteSwap.h
@@ -68,7 +68,14 @@ RtlUlonglongByteSwap(
 #define RtlUlongByteSwap(_x)     __bswap_32((_x))
 #define RtlUlonglongByteSwap(_x) __bswap_64((_x))
 
+#elif defined(__FreeBSD__)
+#include <byteswap.h>
+/* FreeBSD 13+, also above definitions would work
+ * TODO replace with "has byteswap.h" check? */
+#define RtlUshortByteSwap(_x)    bswap_16((_x))
+#define RtlUlongByteSwap(_x)     bswap_32((_x))
+#define RtlUlonglongByteSwap(_x) bswap_64((_x))
+
 #else
-// TODO: include endian.h for BSD?
 #error "ByteSwap.h: Not implemented for this platform"
 #endif
diff --git a/lib/Common/Core/SysInfo.cpp b/lib/Common/Core/SysInfo.cpp
index 9786e6201b6..dc1893a2eb7 100644
--- a/lib/Common/Core/SysInfo.cpp
+++ b/lib/Common/Core/SysInfo.cpp
@@ -11,7 +11,7 @@
 #include <VersionHelpers.h>
 #ifdef __APPLE__
 #include <sys/sysctl.h> // sysctl*
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__FreeBSD__)
 #include <unistd.h> // sysconf
 #endif
 // Initialization order
@@ -195,7 +195,7 @@ AutoSystemInfo::InitPhysicalProcessorCount()
             countPhysicalProcessor = 1;
         }
     }
-#elif defined(__linux__)
+#elif defined(__linux__) || defined(__FreeBSD__)
     countPhysicalProcessor = sysconf(_SC_NPROCESSORS_ONLN);
 #else
     // implementation for __linux__ should work for some others.
diff --git a/lib/Runtime/PlatformAgnostic/Platform/CMakeLists.txt b/lib/Runtime/PlatformAgnostic/Platform/CMakeLists.txt
index 400d775c0b4..84199be87c5 100644
--- a/lib/Runtime/PlatformAgnostic/Platform/CMakeLists.txt
+++ b/lib/Runtime/PlatformAgnostic/Platform/CMakeLists.txt
@@ -34,6 +34,10 @@ elseif(CC_TARGET_OS_OSX)
     Unix/SystemInfo.cpp
     # Linux/PerfTrace.cpp # TODO : implement for OSX?
     )
+elseif(CC_TARGET_OS_FREEBSD)
+  set(PL_SOURCE_FILES ${PL_SOURCE_FILES}
+    Unix/SystemInfo.cpp
+    )
 endif()
 
 add_library (Chakra.Runtime.PlatformAgnostic OBJECT
diff --git a/lib/Runtime/PlatformAgnostic/Platform/Unix/SystemInfo.cpp b/lib/Runtime/PlatformAgnostic/Platform/Unix/SystemInfo.cpp
index 419a4a8395c..415cfb29ad3 100644
--- a/lib/Runtime/PlatformAgnostic/Platform/Unix/SystemInfo.cpp
+++ b/lib/Runtime/PlatformAgnostic/Platform/Unix/SystemInfo.cpp
@@ -5,7 +5,7 @@
 
 #include "Common.h"
 #include "ChakraPlatform.h"
-#include <sys/sysctl.h>
+#include <sys/resource.h>
 
 namespace PlatformAgnostic
 {
diff --git a/pal/inc/pal.h b/pal/inc/pal.h
index 2f3e16b4bd2..f13d475da75 100644
--- a/pal/inc/pal.h
+++ b/pal/inc/pal.h
@@ -242,7 +242,12 @@ extern "C" {
 #endif
 #endif
 
+#ifndef __FreeBSD__
 #define PAL_GLOBAL __attribute__((init_priority(200)))
+#else
+/* TODO above macro expansion fails to compile on FreeBSD */
+#define PAL_GLOBAL
+#endif
 /******************* PAL-Specific Entrypoints *****************************/
 
 #define IsDebuggerPresent PAL_IsDebuggerPresent
diff --git a/pal/src/config.h.in b/pal/src/config.h.in
index 15e4a4c0deb..eb14ad1bf19 100644
--- a/pal/src/config.h.in
+++ b/pal/src/config.h.in
@@ -126,6 +126,7 @@
 #cmakedefine01 ERROR_FUNC_FOR_GLOB_HAS_FIXED_PARAMS
 #cmakedefine01 HAS_FTRUNCATE_LENGTH_ISSUE
 #cmakedefine FREEBSD_LIBC "@FREEBSD_LIBC@"
+#cmakedefine BSD_REGS_STYLE(reg, RR, rr) @BSD_REGS_STYLE@
 
 #cmakedefine JA_JP_LOCALE_NAME "@JA_JP_LOCALE_NAME@"
 #cmakedefine KO_KR_LOCALE_NAME "@KO_KR_LOCALE_NAME@"
diff --git a/pal/src/configure.cmake b/pal/src/configure.cmake
index b0c128e0a1f..596b8b6ce81 100644
--- a/pal/src/configure.cmake
+++ b/pal/src/configure.cmake
@@ -895,6 +895,13 @@ elseif(CMAKE_SYSTEM_NAME STREQUAL FreeBSD)
   set(KO_KR_LOCALE_NAME ko_KR_LOCALE_NOT_FOUND)
   set(ZH_TW_LOCALE_NAME zh_TW_LOCALE_NOT_FOUND)
   set(HAS_FTRUNCATE_LENGTH_ISSUE 0)
+  if(CMAKE_SYSTEM_PROCESSOR STREQUAL amd64)
+    set(BSD_REGS_STYLE "((reg).r_##rr)")
+  elseif(CMAKE_SYSTEM_PROCESSOR STREQUAL arm64)
+    set(BSD_REGS_STYLE "((reg).rr)")
+  else()
+    message(FATAL_ERROR "Unsupported FreeBSD architecture")
+  endif()
 
   if(EXISTS "/lib/libc.so.7")
     set(FREEBSD_LIBC "/lib/libc.so.7")
diff --git a/pal/src/include/pal/context.h b/pal/src/include/pal/context.h
index 8f6e0eac067..d81c14cb7f6 100644
--- a/pal/src/include/pal/context.h
+++ b/pal/src/include/pal/context.h
@@ -28,6 +28,9 @@ extern "C"
  * platforms and another type elsewhere. */
 #if HAVE_UCONTEXT_T
 #include <ucontext.h>
+#ifdef __FreeBSD__
+#include <machine/fpu.h>
+#endif
 
 typedef ucontext_t native_context_t;
 #else   // HAVE_UCONTEXT_T