1 /* $NetBSD: SYS.h,v 1.2 2014/09/05 18:09:37 matt Exp $ */ 2 3 /*- 4 * Copyright (c) 2014 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Matt Thomas of 3am Software Foundry. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 #include <machine/asm.h> 33 #include <sys/syscall.h> 34 #include "sysassym.h" 35 36 #define _DOSYSCALL(x) l.addi r13,r0,(SYS_ ## x) ;\ 37 l.sys 0 ;\ 38 l.nop 39 40 #define _SYSCALL_NOERROR(x,y) ENTRY(x) ;\ 41 .if NSYSARGS_##y > 6 ;\ 42 l.lwz r11, 0(r1) ;\ 43 .endif ;\ 44 .if NSYSARGS_##y > 7 ;\ 45 l.lwz r12, 4(r1) ;\ 46 .endif ;\ 47 _DOSYSCALL(y) 48 49 #define _SYSCALL(x,y) _SYSCALL_NOERROR(x,y) ;\ 50 l.bf _C_LABEL(__cerror) ;\ 51 l.nop 52 53 #define SYSCALL_NOERROR(x) _SYSCALL_NOERROR(x,x) 54 55 #define SYSCALL(x) _SYSCALL(x,x) 56 57 #define PSEUDO_NOERROR(x,y) _SYSCALL_NOERROR(x,y) ;\ 58 l.jr lr ;\ 59 l.nop ;\ 60 END(x) 61 62 #define PSEUDO(x,y) _SYSCALL_NOERROR(x,y) ;\ 63 l.bf _C_LABEL(__cerror) ;\ 64 l.nop ;\ 65 l.jr lr ;\ 66 l.nop ;\ 67 END(x) 68 69 #define RSYSCALL_NOERROR(x) PSEUDO_NOERROR(x,x) 70 71 #define RSYSCALL(x) PSEUDO(x,x) 72 73 #define WSYSCALL(weak,strong) WEAK_ALIAS(weak,strong) ;\ 74 PSEUDO(strong,weak) 75