re PR libffi/29152 (64-bit darwin ppc port needed for libffi)

libffi:
	PR libffi/29152
	PR libffi/42378
	* src/powerpc/darwin_closure.S: Provide Darwin64 implementation,
	update comments.
	* src/powerpc/ffitarget.h (POWERPC_DARWIN64): New,
	(FFI_TRAMPOLINE_SIZE): Update for Darwin64.
	* src/powerpc/darwin.S: Provide Darwin64 implementation,
	update comments.
	* src/powerpc/ffi_darwin.c: Likewise.

From-SVN: r168016

libffi/ChangeLog

+2010-12-18  Iain Sandoe  <iains@gcc.gnu.org>
+
+	PR libffi/29152
+	PR libffi/42378
+	* src/powerpc/darwin_closure.S: Provide Darwin64 implementation,
+	update comments.
+	* src/powerpc/ffitarget.h (POWERPC_DARWIN64): New,
+	(FFI_TRAMPOLINE_SIZE): Update for Darwin64.
+	* src/powerpc/darwin.S: Provide Darwin64 implementation,
+	update comments.
+	* src/powerpc/ffi_darwin.c: Likewise.
+	
 2010-12-06  Rainer Orth  <ro@CeBiTec.Uni-Bielefeld.DE>
 
 	* configure.ac (libffi_cv_as_ascii_pseudo_op): Use double

libffi/src/powerpc/ffitarget.h

 /* -----------------------------------------------------------------*-C-*-
    ffitarget.h - Copyright (c) 1996-2003  Red Hat, Inc.
-   Copyright (C) 2007, 2008 Free Software Foundation, Inc
+   Copyright (C) 2007, 2008, 2010 Free Software Foundation, Inc
    Target configuration macros for PowerPC.
 
    Permission is hereby granted, free of charge, to any person obtaining
@@ -34,10 +34,13 @@
 #ifndef POWERPC64
 #define POWERPC64
 #endif
-#elif defined (POWERPC_DARWIN) && defined (__ppc64__)	/* Darwin */
+#elif defined (POWERPC_DARWIN) && defined (__ppc64__)	/* Darwin64 */
 #ifndef POWERPC64
 #define POWERPC64
 #endif
+#ifndef POWERPC_DARWIN64
+#define POWERPC_DARWIN64
+#endif
 #elif defined (POWERPC_AIX) && defined (__64BIT__)	/* AIX64 */
 #ifndef POWERPC64
 #define POWERPC64
@@ -114,9 +117,13 @@ typedef enum ffi_abi {
 #define FFI_SYSV_TYPE_SMALL_STRUCT (FFI_TYPE_LAST + 2)
 
 #if defined(POWERPC64) || defined(POWERPC_AIX)
-#define FFI_TRAMPOLINE_SIZE 24
+#  if defined(POWERPC_DARWIN64)
+#    define FFI_TRAMPOLINE_SIZE 48
+#  else
+#    define FFI_TRAMPOLINE_SIZE 24
+#  endif
 #else /* POWERPC || POWERPC_AIX */
-#define FFI_TRAMPOLINE_SIZE 40
+#  define FFI_TRAMPOLINE_SIZE 40
 #endif
 
 #ifndef LIBFFI_ASM