Add support of OpenBSD/aarch64

* include/private/gcconfig.h [__aarch64__ && !LINUX && !DARWIN
&& !FREEBSD && !NETBSD] (NOSYS): Do not define if OPENBSD.
* include/private/gcconfig.h [OPENBSD && __aarch64__] (AARCH64,
mach_type_known): Define.
* include/private/gcconfig.h [AARCH64 && OPENBSD] (OS_TYPE, ELF_CLASS,
DATASTART, DATAEND, DYNAMIC_LOADING): Define macro.
* include/private/gcconfig.h [AARCH64 && OPENBSD
&& !GC_OPENBSD_THREADS]: Include sys/param.h, uvm/uvm_extern.h.
* include/private/gcconfig.h [AARCH64 && OPENBSD
&& !GC_OPENBSD_THREADS && USRSTACK] (STACKBOTTOM): Define macro.
* include/private/gcconfig.h [AARCH64 && OPENBSD
&& !GC_OPENBSD_THREADS && !USRSTACK] (HEURISTIC2): Define macro.
* include/private/gcconfig.h [AARCH64 && OPENBSD] (__data_start, _end):
Declare extern variable.

diff --git a/include/private/gcconfig.h b/include/private/gcconfig.h
index 3fa9cba..4e7e444 100644 (file)
--- a/include/private/gcconfig.h
+++ b/include/private/gcconfig.h
@@ -147,7 +147,8 @@ EXTERN_C_BEGIN
 # if defined(__aarch64__)
 #    define AARCH64
 #    if !defined(LINUX) && !defined(DARWIN) && !defined(FREEBSD) \
-        && !defined(NETBSD) && !defined(NN_BUILD_TARGET_PLATFORM_NX)
+        && !defined(NETBSD) && !defined(NN_BUILD_TARGET_PLATFORM_NX) \
+        && !defined(OPENBSD)
 #      define NOSYS
 #      define mach_type_known
 #    endif
@@ -183,6 +184,10 @@ EXTERN_C_BEGIN
 #    define ARM32
 #    define mach_type_known
 # endif
+# if defined(OPENBSD) && defined(__aarch64__)
+#    define AARCH64
+#    define mach_type_known
+# endif
 # if defined(OPENBSD) && defined(__sh__)
 #    define SH
 #    define mach_type_known
@@ -2327,6 +2332,26 @@ EXTERN_C_BEGIN
 #     define ELF_CLASS ELFCLASS64
 #     define DYNAMIC_LOADING
 #   endif
+#   ifdef OPENBSD
+#     define OS_TYPE "OPENBSD"
+#     define ELF_CLASS ELFCLASS64
+#     ifndef GC_OPENBSD_THREADS
+        EXTERN_C_END
+#       include <sys/param.h>
+#       include <uvm/uvm_extern.h>
+        EXTERN_C_BEGIN
+#       ifdef USRSTACK
+#         define STACKBOTTOM ((ptr_t)USRSTACK)
+#       else
+#         define HEURISTIC2
+#       endif
+#     endif
+      extern int __data_start[];
+#     define DATASTART ((ptr_t)__data_start)
+      extern int _end[];
+#     define DATAEND ((ptr_t)(&_end))
+#     define DYNAMIC_LOADING
+#   endif
 #   ifdef NINTENDO_SWITCH
       extern int __bss_end[];
 #     define NO_HANDLE_FORK 1