Initial checkin.

1 files changed, 43 insertions, 0 deletions

diff --git a/libc/sysdeps/linux/v850/syscall.c b/libc/sysdeps/linux/v850/syscall.c
new file mode 100644
index 000000000..2b7d67b4a
--- /dev/null
+++ b/libc/sysdeps/linux/v850/syscall.c
@@ -0,0 +1,43 @@
+/*
+ * libc/sysdeps/linux/v850/syscall.c -- generic syscall function for linux/v850
+ *
+ *  Copyright (C) 2002  NEC Corporation
+ *  Copyright (C) 2002  Miles Bader <miles@gnu.org>
+ *
+ * This file is subject to the terms and conditions of the GNU Lesser
+ * General Public License.  See the file COPYING.LIB in the main
+ * directory of this archive for more details.
+ * 
+ * Written by Miles Bader <miles@gnu.org>
+ */
+
+#include <errno.h>
+#include <sys/syscall.h>
+
+typedef unsigned long arg_t;
+
+/* Invoke `system call' NUM, passing it the remaining arguments.
+   This is completely system-dependent, and not often useful.  */
+long
+syscall (long num, arg_t a1, arg_t a2, arg_t a3, arg_t a4, arg_t a5, arg_t a6)
+{
+  /* We don't know how many arguments are valid, so A5 and A6 are fetched
+     off the stack even for (the majority of) system calls with fewer
+     arguments; hopefully this won't cause any problems.  A1-A4 are in
+     registers, so they're OK.  */
+  register arg_t a asm (SYSCALL_ARG0) = a1;
+  register arg_t b asm (SYSCALL_ARG1) = a2;
+  register arg_t c asm (SYSCALL_ARG2) = a3;
+  register arg_t d asm (SYSCALL_ARG3) = a4;
+  register arg_t e asm (SYSCALL_ARG4) = a5;
+  register arg_t f asm (SYSCALL_ARG5) = a6;
+  register unsigned long syscall asm (SYSCALL_NUM) = num;
+  register unsigned long ret asm (SYSCALL_RET);
+
+  asm ("trap " SYSCALL_LONG_TRAP
+       : "=r" (ret)
+       : "r" (syscall), "r" (a), "r" (b), "r" (c), "r" (d), "r" (e), "r" (f)
+       : SYSCALL_CLOBBERS);
+
+  __syscall_return (long, ret);
+}