1 /* $OpenBSD: SYS.h,v 1.3 2003年06月02日 23:28:09 millert Exp $ */ 2 /* $NetBSD: SYS.h,v 1.2 1999年02月15日 04:54:36 hubertf Exp $ */ 3 /*- 4 * Copyright (c) 1992, 1993 5 * The Regents of the University of California. All rights reserved. 6 * 7 * This software was developed by the Computer Systems Engineering group 8 * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 * contributed to Berkeley. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * @(#)SYS.h 8.1 (Berkeley) 6/4/93 36 * 37 * from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp 38 * $Id: SYS.h,v 1.3 2003年06月02日 23:28:09 millert Exp $ 39 */ 40 41#include <machine/asm.h> 42#include <sys/syscall.h> 43#include <machine/trap.h> 44 45#ifdef __STDC__ 46#define _CAT(x,y) x##y 47#else 48#define _CAT(x,y) x/**/y 49#endif 50 51 /* 52 * ERROR branches to cerror. This is done with a macro so that I can 53 * change it to be position independent later, if need be. 54 */ 55#ifdef PIC 56#define ERROR() \ 57 PIC_PROLOGUE(%g1,%g2); \ 58 ld [%g1+cerror],%g2; jmp %g2; nop 59#else 60#define ERROR() \ 61 sethi %hi(cerror),%g1; or %lo(cerror),%g1,%g1; jmp %g1; nop 62#endif 63 64 /* 65 * SYSCALL is used when further action must be taken before returning. 66 * Note that it adds a `nop' over what we could do, if we only knew what 67 * came at label 1.... 68 */ 69#define SYSCALL(x) \ 70 ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1: 71 72 /* 73 * RSYSCALL is used when the system call should just return. Here 74 * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2 75 * and avoid a branch. 76 */ 77#define RSYSCALL(x) \ 78 ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ 79 t ST_SYSCALL; ERROR() 80 81 /* 82 * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x. 83 */ 84#define PSEUDO(x,y) \ 85 ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ 86 t ST_SYSCALL; ERROR() 87 88 /* 89 * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls 90 * that never fail. 91 * 92 * XXX - This should be optimized. 93 */ 94#define SYSCALL_NOERROR(x) \ 95 ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL 96 97 /* 98 * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls 99 * that never fail. 100 * 101 * XXX - This should be optimized. 102 */ 103#define RSYSCALL_NOERROR(x) \ 104 ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ 105 t ST_SYSCALL 106 107 .globl cerror 108