SYS.h revision 1.10
1 1.1 cgd /*- 2 1.1 cgd * Copyright (c) 1992, 1993 3 1.1 cgd * The Regents of the University of California. All rights reserved. 4 1.1 cgd * 5 1.1 cgd * This software was developed by the Computer Systems Engineering group 6 1.1 cgd * at Lawrence Berkeley Laboratory under DARPA contract BG 91-66 and 7 1.1 cgd * contributed to Berkeley. 8 1.1 cgd * 9 1.1 cgd * Redistribution and use in source and binary forms, with or without 10 1.1 cgd * modification, are permitted provided that the following conditions 11 1.1 cgd * are met: 12 1.1 cgd * 1. Redistributions of source code must retain the above copyright 13 1.1 cgd * notice, this list of conditions and the following disclaimer. 14 1.1 cgd * 2. Redistributions in binary form must reproduce the above copyright 15 1.1 cgd * notice, this list of conditions and the following disclaimer in the 16 1.1 cgd * documentation and/or other materials provided with the distribution. 17 1.1 cgd * 3. All advertising materials mentioning features or use of this software 18 1.1 cgd * must display the following acknowledgement: 19 1.1 cgd * This product includes software developed by the University of 20 1.1 cgd * California, Berkeley and its contributors. 21 1.1 cgd * 4. Neither the name of the University nor the names of its contributors 22 1.1 cgd * may be used to endorse or promote products derived from this software 23 1.1 cgd * without specific prior written permission. 24 1.1 cgd * 25 1.1 cgd * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 1.1 cgd * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 1.1 cgd * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 1.1 cgd * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 1.1 cgd * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 1.1 cgd * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 1.1 cgd * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 1.1 cgd * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 1.1 cgd * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 1.1 cgd * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 1.1 cgd * SUCH DAMAGE. 36 1.1 cgd * 37 1.1 cgd * @(#)SYS.h 8.1 (Berkeley) 6/4/93 38 1.1 cgd * 39 1.1 cgd * from: Header: SYS.h,v 1.2 92/07/03 18:57:00 torek Exp 40 1.10 kleink * $NetBSD: SYS.h,v 1.10 2000/06/26 06:31:37 kleink Exp $ 41 1.1 cgd */ 42 1.1 cgd 43 1.3 pk #include <machine/asm.h> 44 1.1 cgd #include <sys/syscall.h> 45 1.1 cgd #include <machine/trap.h> 46 1.1 cgd 47 1.2 pk #ifdef __STDC__ 48 1.2 pk #define _CAT(x,y) x##y 49 1.2 pk #else 50 1.2 pk #define _CAT(x,y) x/**/y 51 1.2 pk #endif 52 1.2 pk 53 1.9 kleink #ifdef __ELF__ 54 1.9 kleink #define CERROR _C_LABEL(__cerror) 55 1.9 kleink #define CURBRK _C_LABEL(__curbrk) 56 1.9 kleink #else 57 1.9 kleink #define CERROR _ASM_LABEL(cerror) 58 1.9 kleink #define CURBRK _ASM_LABEL(curbrk) 59 1.9 kleink #endif 60 1.9 kleink 61 1.1 cgd /* 62 1.1 cgd * ERROR branches to cerror. This is done with a macro so that I can 63 1.1 cgd * change it to be position independent later, if need be. 64 1.1 cgd */ 65 1.3 pk #ifdef PIC 66 1.3 pk #define ERROR() \ 67 1.3 pk PIC_PROLOGUE(%g1,%g2); \ 68 1.9 kleink ld [%g1+CERROR],%g2; jmp %g2; nop 69 1.3 pk #else 70 1.1 cgd #define ERROR() \ 71 1.9 kleink sethi %hi(CERROR),%g1; or %lo(CERROR),%g1,%g1; jmp %g1; nop 72 1.3 pk #endif 73 1.1 cgd 74 1.1 cgd /* 75 1.1 cgd * SYSCALL is used when further action must be taken before returning. 76 1.1 cgd * Note that it adds a `nop' over what we could do, if we only knew what 77 1.1 cgd * came at label 1.... 78 1.1 cgd */ 79 1.10 kleink #define _SYSCALL(x,y) \ 80 1.10 kleink ENTRY(x); mov _CAT(SYS_,y),%g1; t ST_SYSCALL; bcc 1f; nop; ERROR(); 1: 81 1.10 kleink 82 1.1 cgd #define SYSCALL(x) \ 83 1.10 kleink _SYSCALL(x,x) 84 1.1 cgd 85 1.1 cgd /* 86 1.1 cgd * RSYSCALL is used when the system call should just return. Here 87 1.1 cgd * we use the SYSCALL_G2RFLAG to put the `success' return address in %g2 88 1.1 cgd * and avoid a branch. 89 1.1 cgd */ 90 1.1 cgd #define RSYSCALL(x) \ 91 1.2 pk ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ 92 1.1 cgd t ST_SYSCALL; ERROR() 93 1.1 cgd 94 1.1 cgd /* 95 1.1 cgd * PSEUDO(x,y) is like RSYSCALL(y) except that the name is x. 96 1.1 cgd */ 97 1.1 cgd #define PSEUDO(x,y) \ 98 1.2 pk ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ 99 1.1 cgd t ST_SYSCALL; ERROR() 100 1.4 jtc 101 1.4 jtc /* 102 1.4 jtc * SYSCALL_NOERROR is like SYSCALL, except it's used for syscalls 103 1.4 jtc * that never fail. 104 1.4 jtc * 105 1.4 jtc * XXX - This should be optimized. 106 1.4 jtc */ 107 1.4 jtc #define SYSCALL_NOERROR(x) \ 108 1.6 pk ENTRY(x); mov _CAT(SYS_,x),%g1; t ST_SYSCALL 109 1.4 jtc 110 1.4 jtc /* 111 1.4 jtc * RSYSCALL_NOERROR is like RSYSCALL, except it's used for syscalls 112 1.4 jtc * that never fail. 113 1.4 jtc * 114 1.4 jtc * XXX - This should be optimized. 115 1.4 jtc */ 116 1.4 jtc #define RSYSCALL_NOERROR(x) \ 117 1.6 pk ENTRY(x); mov (_CAT(SYS_,x))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ 118 1.7 kleink t ST_SYSCALL 119 1.7 kleink 120 1.7 kleink /* 121 1.7 kleink * PSEUDO_NOERROR(x,y) is like RSYSCALL_NOERROR(y) except that the name is x. 122 1.7 kleink */ 123 1.8 kleink #define PSEUDO_NOERROR(x,y) \ 124 1.7 kleink ENTRY(x); mov (_CAT(SYS_,y))|SYSCALL_G2RFLAG,%g1; add %o7,8,%g2; \ 125 1.6 pk t ST_SYSCALL 126 1.1 cgd 127 1.9 kleink .globl CERROR 128
Indexes created Tue Sep 23 07:09:52 GMT 2025