From 85bc04d5436ca6c8a30a1ad28862260a04b8b3d5 Mon Sep 17 00:00:00 2001
From: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
Date: Wed, 16 Dec 2009 13:16:08 +0100
Subject: [PATCH 02/15] avr32: add varargs handling of prctl syscall

prctl is defined to use varargs in the header file, hence it needs varargs
specific handling in the source. This patch properly handles the variodic
argument before the syscall is passed to the kernel for the AVR32 architecture.

Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
---
 libc/sysdeps/linux/avr32/Makefile.arch |    2 +-
 libc/sysdeps/linux/avr32/prctl.c       |   36 ++++++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletions(-)
 create mode 100644 libc/sysdeps/linux/avr32/prctl.c

diff --git a/libc/sysdeps/linux/avr32/Makefile.arch b/libc/sysdeps/linux/avr32/Makefile.arch
index bc5f625..98b85a7 100644
--- a/libc/sysdeps/linux/avr32/Makefile.arch
+++ b/libc/sysdeps/linux/avr32/Makefile.arch
@@ -5,7 +5,7 @@
 # Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
 #
 
-CSRC	:= brk.c clone.c mmap.c sigaction.c
+CSRC	:= brk.c clone.c mmap.c prctl.c sigaction.c
 
 SSRC	:= __longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S	\
 		sigrestorer.S syscall.S vfork.S
diff --git a/libc/sysdeps/linux/avr32/prctl.c b/libc/sysdeps/linux/avr32/prctl.c
new file mode 100644
index 0000000..4e146e3
--- /dev/null
+++ b/libc/sysdeps/linux/avr32/prctl.c
@@ -0,0 +1,36 @@
+/*
+ * prctl syscall for AVR32 Linux.
+ *
+ * Copyright (C) 2010 Atmel Corporation
+ *
+ * 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.
+ */
+#include <sys/syscall.h>
+#include <sys/prctl.h>
+#include <stdarg.h>
+
+#ifdef __NR_prctl
+#define __NR___syscall_prctl	__NR_prctl
+static inline _syscall5(int, __syscall_prctl, int, option, long, arg2,
+		long, arg3, long, arg4, long, arg5);
+
+int prctl(int __option, ...)
+{
+	long arg2;
+	long arg3;
+	long arg4;
+	long arg5;
+	va_list ap;
+
+	va_start(ap, __option);
+	arg2 = va_arg(ap, long);
+	arg3 = va_arg(ap, long);
+	arg4 = va_arg(ap, long);
+	arg5 = va_arg(ap, long);
+	va_end(ap);
+
+	return INLINE_SYSCALL(prctl, 5, __option, arg2, arg3, arg4, arg5);
+}
+#endif
-- 
1.6.6.1

