SYS.h revision 1.6 
1/*	$NetBSD: SYS.h,v 1.6 2007/11/18 13:25:39 skrll Exp $	*/
2
3/*	$OpenBSD: SYS.h,v 1.9 2001/09/20 20:52:09 millert Exp $	*/
4
5/*
6 * Copyright (c) 1998-1999 Michael Shalayeff
7 * All rights reserved.
8 *
9 * Redistribution and use in source and binary forms, with or without
10 * modification, are permitted provided that the following conditions
11 * are met:
12 * 1. Redistributions of source code must retain the above copyright
13 *    notice, this list of conditions and the following disclaimer.
14 * 2. Redistributions in binary form must reproduce the above copyright
15 *    notice, this list of conditions and the following disclaimer in the
16 *    documentation and/or other materials provided with the distribution.
17 * 3. All advertising materials mentioning features or use of this software
18 *    must display the following acknowledgement:
19 *	This product includes software developed by Michael Shalayeff.
20 * 4. The name of the author may not be used to endorse or promote products
21 *    derived from this software without specific prior written permission.
22 *
23 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
24 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
25 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
26 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
27 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
28 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF MIND
29 * USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
30 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
31 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
32 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
33 */
34
35#include <sys/syscall.h>
36#include <machine/asm.h>
37#include <machine/vmparam.h>
38#undef _LOCORE
39#define _LOCORE
40#include <machine/frame.h>
41
42#define	SYSENTRY(x)	LEAF_ENTRY(x)
43#define	SYSEXIT(x)	EXIT(x)
44
45#define	SYSCALL(x)				!\
46	stw	%rp, HPPA_FRAME_ERP(%sr0,%sp)	!\
47	ldil	L%SYSCALLGATE, %r1		!\
48	ble	4(%sr7, %r1)			!\
49	ldi	__CONCAT(SYS_,x), %t1		!\
50	.import __cerror, code			!\
51	comb,<>	%r0, %t1, __cerror		!\
52	ldw	HPPA_FRAME_ERP(%sr0,%sp), %rp
53
54#define	PSEUDO(x,y)				!\
55SYSENTRY(x)					!\
56	SYSCALL(y)				!\
57	bv	%r0(%rp)			!\
58	nop					!\
59SYSEXIT(x)
60
61#define	PSEUDO_NOERROR(x,y)			!\
62SYSENTRY(x)					!\
63	stw	%rp, HPPA_FRAME_ERP(%sr0,%sp)	!\
64	ldil	L%SYSCALLGATE, %r1		!\
65	ble	4(%sr7, %r1)			!\
66	ldi	__CONCAT(SYS_,y), %t1		!\
67	ldw	HPPA_FRAME_ERP(%sr0,%sp), %rp	!\
68	bv	%r0(%rp)			!\
69	nop					!\
70SYSEXIT(x)
71
72#define RSYSCALL(x)		PSEUDO(x,x)
73#define	RSYSCALL_NOERROR(x)	PSEUDO_NOERROR(x,x)
74
75#ifdef WEAK_ALIAS
76#define WSYSCALL(weak,strong)		!\
77	WEAK_ALIAS(weak,strong)		!\
78	PSEUDO(strong,weak)
79#else
80#define WSYSCALL(weak,strong)		!\
81	PSEUDO(weak,weak)
82#endif
83