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From 85bc04d5436ca6c8a30a1ad28862260a04b8b3d5 Mon Sep 17 00:00:00 2001
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From: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
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Date: Wed, 16 Dec 2009 13:16:08 +0100
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Subject: [PATCH 02/15] avr32: add varargs handling of prctl syscall
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prctl is defined to use varargs in the header file, hence it needs varargs
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specific handling in the source. This patch properly handles the variodic
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argument before the syscall is passed to the kernel for the AVR32 architecture.
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Signed-off-by: Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>
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---
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libc/sysdeps/linux/avr32/Makefile.arch | 2 +-
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libc/sysdeps/linux/avr32/prctl.c | 36 ++++++++++++++++++++++++++++++++
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2 files changed, 37 insertions(+), 1 deletions(-)
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create mode 100644 libc/sysdeps/linux/avr32/prctl.c
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diff --git a/libc/sysdeps/linux/avr32/Makefile.arch b/libc/sysdeps/linux/avr32/Makefile.arch
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index bc5f625..98b85a7 100644
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--- a/libc/sysdeps/linux/avr32/Makefile.arch
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+++ b/libc/sysdeps/linux/avr32/Makefile.arch
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@@ -5,7 +5,7 @@
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# Licensed under the LGPL v2.1, see the file COPYING.LIB in this tarball.
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#
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-CSRC := brk.c clone.c mmap.c sigaction.c
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+CSRC := brk.c clone.c mmap.c prctl.c sigaction.c
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SSRC := __longjmp.S setjmp.S bsd-setjmp.S bsd-_setjmp.S \
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sigrestorer.S syscall.S vfork.S
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diff --git a/libc/sysdeps/linux/avr32/prctl.c b/libc/sysdeps/linux/avr32/prctl.c
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new file mode 100644
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index 0000000..4e146e3
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--- /dev/null
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+++ b/libc/sysdeps/linux/avr32/prctl.c
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@@ -0,0 +1,36 @@
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+/*
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+ * prctl syscall for AVR32 Linux.
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+ *
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+ * Copyright (C) 2010 Atmel Corporation
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+ *
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+ * This file is subject to the terms and conditions of the GNU Lesser General
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+ * Public License. See the file "COPYING.LIB" in the main directory of this
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+ * archive for more details.
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+ */
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+#include <sys/syscall.h>
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+#include <sys/prctl.h>
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+#include <stdarg.h>
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+
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+#ifdef __NR_prctl
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+#define __NR___syscall_prctl __NR_prctl
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+static inline _syscall5(int, __syscall_prctl, int, option, long, arg2,
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+ long, arg3, long, arg4, long, arg5);
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+
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+int prctl(int __option, ...)
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+{
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+ long arg2;
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+ long arg3;
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+ long arg4;
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+ long arg5;
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+ va_list ap;
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+
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+ va_start(ap, __option);
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+ arg2 = va_arg(ap, long);
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+ arg3 = va_arg(ap, long);
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+ arg4 = va_arg(ap, long);
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+ arg5 = va_arg(ap, long);
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+ va_end(ap);
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+
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+ return INLINE_SYSCALL(prctl, 5, __option, arg2, arg3, arg4, arg5);
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+}
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+#endif
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--
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1.6.6.1
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