Add AArch64 (64-bit ARM) target support

* include/private/gcconfig.h (AARCH64): New macro (defined only if
__aarch64__).
* include/private/gcconfig.h (mach_type_known): Update comment adding
ARM AArch64 target.
* include/private/gcconfig.h (NOSYS, mach_type_known, CPP_WORDSZ,
MACH_TYPE, ALIGNMENT, HBLKSIZE, OS_TYPE, LINUX_STACKBOTTOM,
DYNAMIC_LOADING, DATASTART, DATAEND, STACKBOTTOM): Define for AArch64.

diff --git a/include/private/gcconfig.h b/include/private/gcconfig.h
index f928f1662a4f63e695518f31463cd59a6282d05d..9215dd780faed808e37e6a2201f8c5a63da1c199 100644 (file)
--- a/include/private/gcconfig.h
+++ b/include/private/gcconfig.h
@@ -82,6 +82,13 @@
 #    define I386
 #    define mach_type_known
 # endif
+# if defined(__aarch64__)
+#    define AARCH64
+#    if !defined(LINUX)
+#      define NOSYS
+#      define mach_type_known
+#    endif
+# endif
 # if defined(__arm) || defined(__arm__) || defined(__thumb__)
 #    define ARM32
 #    if !defined(LINUX) && !defined(NETBSD) && !defined(OPENBSD) \
@@ -263,6 +270,10 @@
 #    define IA64
 #    define mach_type_known
 # endif
+# if defined(LINUX) && defined(__aarch64__)
+#    define AARCH64
+#    define mach_type_known
+# endif
 # if defined(LINUX) && (defined(__arm) || defined(__arm__))
 #    define ARM32
 #    define mach_type_known
@@ -557,6 +568,7 @@
                     /*                  running Amdahl UTS4             */
                     /*             S390       ==> 390-like machine      */
                     /*                  running LINUX                   */
+                    /*             AARCH64    ==> ARM AArch64           */
                     /*             ARM32      ==> Intel StrongARM       */
                     /*             IA64       ==> Intel IPF             */
                     /*                            (e.g. Itanium)        */
@@ -1942,6 +1954,31 @@
 #   endif
 # endif
 
+# ifdef AARCH64
+#   define CPP_WORDSZ 64
+#   define MACH_TYPE "AARCH64"
+#   define ALIGNMENT 8
+#   ifndef HBLKSIZE
+#     define HBLKSIZE 4096
+#   endif
+#   ifdef LINUX
+#     define OS_TYPE "LINUX"
+#     define LINUX_STACKBOTTOM
+#     define DYNAMIC_LOADING
+      extern int __data_start[];
+#     define DATASTART ((ptr_t)__data_start)
+      extern char _end[];
+#     define DATAEND ((ptr_t)(&_end))
+#   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
+
 # ifdef ARM32
 #   define CPP_WORDSZ 32
 #   define MACH_TYPE "ARM32"