1 /* $NetBSD: SYS.h,v 1.12 2012/02/27 12:26:21 joerg Exp $ */ 2 /* 3 * Copyright (c) 1983, 1993 4 * The Regents of the University of California. All rights reserved. 5 * 6 * Redistribution and use in source and binary forms, with or without 7 * modification, are permitted provided that the following conditions 8 * are met: 9 * 1. Redistributions of source code must retain the above copyright 10 * notice, this list of conditions and the following disclaimer. 11 * 2. Redistributions in binary form must reproduce the above copyright 12 * notice, this list of conditions and the following disclaimer in the 13 * documentation and/or other materials provided with the distribution. 14 * 3. Neither the name of the University nor the names of its contributors 15 * may be used to endorse or promote products derived from this software 16 * without specific prior written permission. 17 * 18 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 19 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 20 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 21 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 22 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 23 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 24 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 25 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 26 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 27 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 28 * SUCH DAMAGE. 29 * 30 * @(#)SYS.h 8.1 (Berkeley) 6/4/93 31 */ 32 33 #include <machine/asm.h> 34 #include <sys/syscall.h> 35 36 #define CERROR _C_LABEL(__cerror) 37 #define CURBRK _C_LABEL(__curbrk) 38 39 #ifdef __STDC__ 40 #define SYSTRAP(x) chmk $ SYS_ ## x 41 #else 42 #define SYSTRAP(x) chmk $ SYS_/**/x 43 #endif 44 45 #define _SYSCALL_NOERROR(x,y) \ 46 ENTRY(x,0); \ 47 SYSTRAP(y) 48 49 #define _SYSCALL(x,y) \ 50 .p2align 2; \ 51 err: nop; nop; jmp CERROR+2; \ 52 _SYSCALL_NOERROR(x,y); \ 53 jcs err+2 54 55 #define SYSCALL_NOERROR(x) \ 56 _SYSCALL_NOERROR(x,x) 57 58 #define SYSCALL(x) \ 59 _SYSCALL(x,x) 60 61 #define PSEUDO_NOERROR(x,y) \ 62 _SYSCALL_NOERROR(x,y); \ 63 ret; \ 64 END(x) 65 66 #define PSEUDO(x,y) \ 67 _SYSCALL(x,y); \ 68 ret; \ 69 END(x) 70 71 #define RSYSCALL_NOERROR(x) \ 72 PSEUDO_NOERROR(x,x) 73 74 #define RSYSCALL(x) \ 75 PSEUDO(x,x) 76 77 #ifdef WEAK_ALIAS 78 #define WSYSCALL(weak,strong) \ 79 WEAK_ALIAS(weak,strong); \ 80 PSEUDO(strong,weak) 81 #else 82 #define WSYSCALL(weak,strong) \ 83 PSEUDO(weak,weak) 84 #endif 85 86 #define ASMSTR .asciz 87 88 .protected CERROR 89 .globl CERROR 90