[PATCH] Make v850 syscall6 macro support both old and new gcc versions

Make v850 syscall6 macro support both old and new gcc versions

include/asm-v850/unistd.h

@@ -340,6 +340,30 @@ type name (atype a, btype b, ctype c, dtype d, etype e)			      \
   __syscall_return (type, __ret);					      \
 }
 
+#if __GNUC__ < 3
+/* In older versions of gcc, `asm' statements with more than 10
+   input/output arguments produce a fatal error.  To work around this
+   problem, we use two versions, one for gcc-3.x and one for earlier
+   versions of gcc (the `earlier gcc' version doesn't work with gcc-3.x
+   because gcc-3.x doesn't allow clobbers to also be input arguments).  */
+#define __SYSCALL6_TRAP(syscall, ret, a, b, c, d, e, f)			      \
+  __asm__ __volatile__ ("trap " SYSCALL_LONG_TRAP			      \
+			: "=r" (ret), "=r" (syscall)			      \
+			: "1" (syscall),				      \
+			"r" (a), "r" (b), "r" (c), "r" (d),		      \
+ 			"r" (e), "r" (f)				      \
+			: SYSCALL_CLOBBERS, SYSCALL_ARG4, SYSCALL_ARG5);
+#else /* __GNUC__ >= 3 */
+#define __SYSCALL6_TRAP(syscall, ret, a, b, c, d, e, f)			      \
+  __asm__ __volatile__ ("trap " SYSCALL_LONG_TRAP			      \
+			: "=r" (ret), "=r" (syscall),			      \
+ 			"=r" (e), "=r" (f)				      \
+			: "1" (syscall),				      \
+			"r" (a), "r" (b), "r" (c), "r" (d),		      \
+			"2" (e), "3" (f)				      \
+			: SYSCALL_CLOBBERS);
+#endif
+
 #define _syscall6(type, name, atype, a, btype, b, ctype, c, dtype, d, etype, e, ftype, f) \
 type name (atype a, btype b, ctype c, dtype d, etype e, ftype f)	      \
 {									      \
@@ -351,13 +375,7 @@ type name (atype a, btype b, ctype c, dtype d, etype e, ftype f)	      \
   register etype __f __asm__ (SYSCALL_ARG5) = f;			      \
   register unsigned long __syscall __asm__ (SYSCALL_NUM) = __NR_##name;	      \
   register unsigned long __ret __asm__ (SYSCALL_RET);			      \
-  __asm__ __volatile__ ("trap " SYSCALL_LONG_TRAP			      \
-			: "=r" (__ret), "=r" (__syscall), 		      \
- 			"=r" (__e), "=r" (__f)				      \
-			: "1" (__syscall),				      \
-			"r" (__a), "r" (__b), "r" (__c), "r" (__d),	      \
-			"2" (__e), "3" (__f)				      \
-			: SYSCALL_CLOBBERS);				      \
+  __SYSCALL6_TRAP(__syscall, __ret, __a, __b, __c, __d, __e, __f);	      \
   __syscall_return (type, __ret);					      \
 }