add system call execution for uti

Change-Id: Ide79726b79964e72596ed78c87ec61d1eaf7e1c7

executer/user/arch/arm64/archdep_c.c

@@ -0,0 +1,69 @@
+/* archdep_c.c COPYRIGHT FUJITSU LIMITED 2019 */
+
+long uti_syscall6(long syscall_number,
+		  long arg0, long arg1, long arg2,
+		  long arg3, long arg4, long arg5)
+{
+	long ret;
+
+	asm volatile(
+		"mov x8, %1;"
+		"mov x0, %2;"
+		"mov x1, %3;"
+		"mov x2, %4;"
+		"mov x3, %5;"
+		"mov x4, %6;"
+		"mov x5, %7;"
+		"svc #0x0;"
+		"mov %0, x0;"
+		: "=r" (ret)
+		: "r" (syscall_number),
+		  "r" (arg0), "r" (arg1), "r" (arg2),
+		  "r" (arg3), "r" (arg4), "r" (arg5));
+	return ret;
+}
+
+long uti_syscall3(long syscall_number, long arg0, long arg1, long arg2)
+{
+	long ret;
+
+	asm volatile(
+		"mov x8, %1;"
+		"mov x0, %2;"
+		"mov x1, %3;"
+		"mov x2, %4;"
+		"svc #0x0;"
+		"mov %0, x0;"
+		: "=r" (ret)
+		: "r" (syscall_number),
+		  "r" (arg0), "r" (arg1), "r" (arg2));
+	return ret;
+}
+
+long uti_syscall1(long syscall_number, long arg0)
+{
+	long ret;
+
+	asm volatile(
+		"mov x8, %1;"
+		"mov x0, %2;"
+		"svc #0x0;"
+		"mov %0, x0;"
+		: "=r" (ret)
+		: "r" (syscall_number),
+		  "r" (arg0));
+	return ret;
+}
+
+long uti_syscall0(long syscall_number)
+{
+	long ret;
+
+	asm volatile(
+		"mov x8, %1;"
+		"svc #0x0;"
+		"mov %0, x0;"
+		: "=r" (ret)
+		: "r" (syscall_number));
+	return ret;
+}