1 1.15 joerg /* $NetBSD: SYS.h,v 1.15 2013/09/12 15:36:16 joerg Exp $ */ 2 1.8 thorpej 3 1.1 eeh /*- 4 1.1 eeh * Copyright (c) 1992, 1993 5 1.1 eeh * The Regents of the University of California. All rights reserved. 6 1.1 eeh * 7 1.1 eeh * This software was developed by the Computer Systems Engineering group 8 1.1 eeh * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 9 1.1 eeh * contributed to Berkeley. 10 1.1 eeh * 11 1.1 eeh * Redistribution and use in source and binary forms, with or without 12 1.1 eeh * modification, are permitted provided that the following conditions 13 1.1 eeh * are met: 14 1.1 eeh * 1. Redistributions of source code must retain the above copyright 15 1.1 eeh * notice, this list of conditions and the following disclaimer. 16 1.1 eeh * 2. Redistributions in binary form must reproduce the above copyright 17 1.1 eeh * notice, this list of conditions and the following disclaimer in the 18 1.1 eeh * documentation and/or other materials provided with the distribution. 19 1.13 agc * 3. Neither the name of the University nor the names of its contributors 20 1.1 eeh * may be used to endorse or promote products derived from this software 21 1.1 eeh * without specific prior written permission. 22 1.1 eeh * 23 1.1 eeh * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 1.1 eeh * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 1.1 eeh * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 1.1 eeh * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 1.1 eeh * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 1.1 eeh * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 1.1 eeh * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 1.1 eeh * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 1.1 eeh * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 1.1 eeh * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 1.1 eeh * SUCH DAMAGE. 34 1.1 eeh * 35 1.1 eeh * @(#)SYS.h 8.1 (Berkeley) 6/4/93 36 1.1 eeh * 37 1.1 eeh * from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp 38 1.1 eeh */ 39 1.1 eeh 40 1.1 eeh #include <machine/asm.h> 41 1.1 eeh #include <sys/syscall.h> 42 1.1 eeh #include <machine/trap.h> 43 1.1 eeh 44 1.12 wiz #ifdef __STDC__ 45 1.1 eeh #define _CAT(x,y) x##y 46 1.12 wiz #else 47 1.12 wiz #define _CAT(x,y) x/**/y 48 1.12 wiz #endif 49 1.1 eeh 50 1.1 eeh /* 51 1.1 eeh * ERROR branches to cerror. This is done with a macro so that I can 52 1.1 eeh * change it to be position independent later, if need be. 53 1.1 eeh */ 54 1.15 joerg #if __PIC__ - 0 >= 2 55 1.9 eeh #define JUMP(name) \ 56 1.9 eeh PIC_PROLOGUE(%g1,%g5); \ 57 1.9 eeh sethi %hi(_C_LABEL(name)),%g5; \ 58 1.9 eeh or %g5,%lo(_C_LABEL(name)),%g5; \ 59 1.9 eeh ldx [%g1+%g5],%g5; \ 60 1.9 eeh jmp %g5; \ 61 1.5 chs nop 62 1.15 joerg #elif __PIC__ - 0 >= 1 63 1.9 eeh #define JUMP(name) \ 64 1.9 eeh PIC_PROLOGUE(%g1,%g5); \ 65 1.9 eeh ldx [%g1+_C_LABEL(name)],%g5; jmp %g5; nop 66 1.9 eeh #else 67 1.9 eeh #define JUMP(name) set _C_LABEL(name),%g1; jmp %g1; nop 68 1.9 eeh #endif 69 1.9 eeh #define ERROR() JUMP(__cerror) 70 1.1 eeh /* 71 1.1 eeh * SYSCALL is used when further action must be taken before returning. 72 1.1 eeh * Note that it adds a `nop' over what we could do, if we only knew what 73 1.1 eeh * came at label 1.... 74 1.1 eeh */ 75 1.3 kleink #define _SYSCALL(x,y) \ 76 1.3 kleink ENTRY(x); mov _CAT(SYS_,y),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1: 77 1.3 kleink 78 1.1 eeh #define SYSCALL(x) \ 79 1.3 kleink _SYSCALL(x,x) 80 1.1 eeh 81 1.1 eeh /* 82 1.1 eeh * RSYSCALL is used when the system call should just return. Here 83 1.14 martin * we use the SYSCALL_G5RFLAG to put the `success' return address in %g5 84 1.1 eeh * and avoid a branch. 85 1.1 eeh */ 86 1.1 eeh #define RSYSCALL(x) \ 87 1.14 martin ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \ 88 1.1 eeh t ST_SYSCALL; ERROR() 89 1.1 eeh 90 1.1 eeh /* 91 1.1 eeh * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x. 92 1.1 eeh */ 93 1.1 eeh #define PSEUDO(x,y) \ 94 1.14 martin ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \ 95 1.1 eeh t ST_SYSCALL; ERROR() 96 1.7 thorpej 97 1.7 thorpej /* 98 1.7 thorpej * WSYSCALL(weak,strong) is like RSYSCALL(weak), except that weak is 99 1.7 thorpej * a weak internal alias for the strong symbol. 100 1.7 thorpej */ 101 1.7 thorpej #define WSYSCALL(weak,strong) \ 102 1.7 thorpej WEAK_ALIAS(weak,strong); \ 103 1.7 thorpej PSEUDO(strong,weak) 104 1.1 eeh 105 1.1 eeh /* 106 1.1 eeh * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls 107 1.1 eeh * that never fail. 108 1.1 eeh * 109 1.1 eeh * XXX - This should be optimized. 110 1.1 eeh */ 111 1.1 eeh #define SYSCALL_NOERROR(x) \ 112 1.1 eeh ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL 113 1.1 eeh 114 1.1 eeh /* 115 1.1 eeh * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls 116 1.1 eeh * that never fail. 117 1.1 eeh * 118 1.1 eeh * XXX - This should be optimized. 119 1.1 eeh */ 120 1.1 eeh #define RSYSCALL_NOERROR(x) \ 121 1.14 martin ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \ 122 1.1 eeh t ST_SYSCALL 123 1.1 eeh 124 1.1 eeh /* 125 1.1 eeh * PSEUDO_NOERROR(x,y) is like RSYSCALL_NOERROR(y) except that the name is x. 126 1.1 eeh */ 127 1.1 eeh #define PSEUDO_NOERROR(x,y) \ 128 1.14 martin ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G5RFLAG,%g1; add %o7,8,%g5; \ 129 1.1 eeh t ST_SYSCALL 130 1.8 thorpej 131 1.2 kleink .globl _C_LABEL(__cerror) 132
Indexes created Sun Sep 21 18:09:52 GMT 2025