Add aarch64 support to the internal copy of boehm-gc, taken from boehm-gc upstream and the OpenBSD port.
Index: patches/patch-sigscheme_libgcroots_include_private_gcconfig_h =================================================================== RCS file: patches/patch-sigscheme_libgcroots_include_private_gcconfig_h diff -N patches/patch-sigscheme_libgcroots_include_private_gcconfig_h --- /dev/null 1 Jan 1970 00:00:00 -0000 +++ patches/patch-sigscheme_libgcroots_include_private_gcconfig_h 29 Dec 2018 22:22:31 -0000 @@ -0,0 +1,118 @@ +$OpenBSD$ + +Index: sigscheme/libgcroots/include/private/gcconfig.h +--- sigscheme/libgcroots/include/private/gcconfig.h.orig ++++ sigscheme/libgcroots/include/private/gcconfig.h +@@ -62,6 +62,14 @@ + # endif + + /* Determine the machine type: */ ++# if defined(__aarch64__) ++# define AARCH64 ++# if !defined(LINUX) && !defined(DARWIN) && !defined(FREEBSD) \ ++ && !defined(OPENBSD) ++# define NOSYS ++# define mach_type_known ++# endif ++# endif + # if defined(__arm__) || defined(__thumb__) + # define ARM32 + # if !defined(LINUX) && !defined(NETBSD) +@@ -75,6 +83,10 @@ + # if defined(hp9000s300) + # error M68K based HP machines no longer supported. + # endif ++# if defined(OPENBSD) && defined(__aarch64__) ++# define AARCH64 ++# define mach_type_known ++# endif + # if defined(OPENBSD) && defined(m68k) + # define M68K + # define mach_type_known +@@ -1721,6 +1733,86 @@ + # define DATAEND (_end) + # define CACHE_LINE_SIZE 256 + # define GETPAGESIZE() 4096 ++# endif ++# endif ++ ++# ifdef AARCH64 ++# define MACH_TYPE "AARCH64" ++# ifdef __ILP32__ ++# define CPP_WORDSZ 32 ++# define ALIGNMENT 4 ++# else ++# define CPP_WORDSZ 64 ++# define ALIGNMENT 8 ++# endif ++# ifndef HBLKSIZE ++# define HBLKSIZE 4096 ++# endif ++# ifdef LINUX ++# define OS_TYPE "LINUX" ++# define LINUX_STACKBOTTOM ++# define DYNAMIC_LOADING ++ extern int __data_start[]; ++ extern int _end[]; ++# define DATASTART ((ptr_t)__data_start) ++# define DATAEND ((ptr_t)(&_end)) ++# endif ++# ifdef DARWIN ++ /* iOS */ ++# define OS_TYPE "DARWIN" ++# define DARWIN_DONT_PARSE_STACK ++# ifndef GC_DONT_REGISTER_MAIN_STATIC_DATA ++# define DYNAMIC_LOADING ++# endif ++# define DATASTART ((ptr_t)get_etext()) ++# define DATAEND ((ptr_t)get_end()) ++# define STACKBOTTOM ((ptr_t)0x16fdfffff) ++# ifndef USE_MMAP ++# define USE_MMAP ++# endif ++# define USE_MMAP_ANON ++# define MPROTECT_VDB ++# include <unistd.h> ++# define GETPAGESIZE() (unsigned)getpagesize() ++ /* FIXME: There seems to be some issues with trylock hanging on */ ++ /* darwin. This should be looked into some more. */ ++# define NO_PTHREAD_TRYLOCK ++# if TARGET_OS_IPHONE && !defined(NO_DYLD_BIND_FULLY_IMAGE) ++# define NO_DYLD_BIND_FULLY_IMAGE ++# endif ++# endif ++# ifdef FREEBSD ++# define OS_TYPE "FREEBSD" ++# ifndef GC_FREEBSD_THREADS ++# define MPROTECT_VDB ++# endif ++# define FREEBSD_STACKBOTTOM ++# ifdef __ELF__ ++# define DYNAMIC_LOADING ++# endif ++ extern char etext[]; ++# define DATASTART GC_FreeBSDGetDataStart(0x1000, (ptr_t)etext) ++# define DATASTART_USES_BSDGETDATASTART ++# endif ++# ifdef OPENBSD ++# define OS_TYPE "OPENBSD" ++# ifndef GC_OPENBSD_THREADS ++# include <sys/param.h> ++# include <uvm/uvm_extern.h> ++# define STACKBOTTOM ((ptr_t)USRSTACK) ++# endif ++ extern int __data_start[]; ++# define DATASTART ((ptr_t)__data_start) ++ extern int _end[]; ++# define DATAEND ((ptr_t)(&_end)) ++# define DYNAMIC_LOADING ++# endif ++# ifdef NOSYS ++ /* __data_start is usually defined in the target linker script. */ ++ extern int __data_start[]; ++# define DATASTART ((ptr_t)__data_start) ++ extern void *__stack_base__; ++# define STACKBOTTOM ((ptr_t)__stack_base__) + # endif + # endif +
