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authorGravatar Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>2009-12-16 13:16:08 +0100
committerGravatar Hans-Christian Egtvedt <hans-christian.egtvedt@atmel.com>2010-01-21 11:31:33 +0100
commit2b69e9906e5087a796b3a15e9aabcd102c705b19 (patch)
tree577d8bafad675828fb53b7a9fbe65bf26392ca6f
parent831ea78623556cbfae002477afc6256cacaaf2c6 (diff)
downloaduClibc-2b69e9906e5087a796b3a15e9aabcd102c705b19.tar.gz
uClibc-2b69e9906e5087a796b3a15e9aabcd102c705b19.tar.bz2
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>
-rw-r--r--libc/sysdeps/linux/avr32/Makefile.arch2
-rw-r--r--libc/sysdeps/linux/avr32/prctl.c36
2 files changed, 37 insertions, 1 deletions
diff --git a/libc/sysdeps/linux/avr32/Makefile.arch b/libc/sysdeps/linux/avr32/Makefile.arch
index bc5f62550..98b85a7ce 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 000000000..4e146e35e
--- /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