/* $Id$ */
/* Copyright (c) 2009-2015 Pierre Pronchery <khorben@defora.org> */
/* This file is part of DeforaOS System libc */
/* All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions are
 * met:
 *
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 *
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
 * IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
 * PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
 * TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
 * PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
 * LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
 * NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
 * SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. */



_syscall:
	mov	%rcx, %r10
	syscall
	cmp	$0, %rax
	jge	_syscall_return
	cmp	$-4096, %rax
	jle	_syscall_return
.errno:
	neg	%rax
#ifdef __PIC__
	mov	errno@GOTPCREL(%rip), %rcx
	mov	%rax, (%rcx)
#else
	mov	%rax, errno
#endif
	mov	$-1, %rax
_syscall_return:
	ret


/* macros */
#ifdef __PIC__
# define SYSCALL(name) \
.global name; \
.type name,@function; \
name:; \
	mov	$SYS_ ## name, %rax; \
	jmp	_syscall@PLT
#else
# define SYSCALL(name) \
.global name; \
.type name,@function; \
name:; \
	mov	$SYS_ ## name, %rax; \
	jmp	_syscall
#endif