Add support for the Analog Devices Blackfin mmuless processor

1 files changed, 49 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/bfin/syscall.c b/libc/sysdeps/linux/bfin/syscall.c
new file mode 100644
index 000000000..6fe6cf2e6
--- /dev/null
+++ b/libc/sysdeps/linux/bfin/syscall.c
@@ -0,0 +1,49 @@
+/* vi: set sw=4 ts=4: */
+/* syscall for blackfin/uClibc
+ *
+ * Copyright (C) 2004 by Analog Devices Inc.
+ * Copyright (C) 2002 by Erik Andersen <andersen@uclibc.org>
+ *
+ * This program is free software; you can redistribute it and/or modify it
+ * under the terms of the GNU Library General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or (at your
+ * option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful, but WITHOUT
+ * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
+ * FITNESS FOR A PARTICULAR PURPOSE. See the GNU Library General Public License
+ * for more details.
+ *
+ * You should have received a copy of the GNU Library General Public License
+ * along with this program; if not, write to the Free Software Foundation,
+ * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ */
+
+#include <features.h>
+#include <errno.h>
+#include <sys/types.h>
+#include <sys/syscall.h>
+
+long syscall(long sysnum, long a, long b, long c, long d, long e)
+{
+	int _r0 = 0;
+    asm volatile(
+	    "p0 = %1;"		/*SysCall Number*/
+	    "r0 = %2;"
+	    "r1 = %3;"
+	    "r2 = %4;"
+		"r3 = %6;"
+		"r4 = %5;"
+		"excpt 0;"		/*Call the System Call*/
+		"%0 = r0;"		/*Store the result of syscall*/
+	    : "=r"(_r0)
+	    : "r"(sysnum), "r"(a), "r"(b),
+	      "r"(c), "r"(d), "r"(e)
+	    : "memory");
+
+    if(_r0 >=(unsigned long) -4095) {
+	(*__errno_location())=(-_r0);
+	_r0=(unsigned long) -1;
+    }
+    return (long) _r0;
+}