[WIP] FreeBSD support

CMakeLists.txt

@@ -48,7 +48,8 @@ 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)
@@ -121,6 +122,8 @@ 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)
@@ -331,6 +334,11 @@ 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()

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

lib/Common/Core/SysInfo.cpp

@@ -10,7 +10,7 @@
 #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
@@ -194,7 +194,7 @@ 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.

pal/inc/pal.h

@@ -230,7 +230,12 @@ 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

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@"

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")

pal/src/include/pal/context.h

@@ -25,6 +25,9 @@ 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