1 /*- 2 * Copyright (c) 1990 The Regents of the University of California. 3 * All rights reserved. 4 * 5 * This code is derived from software contributed to Berkeley by 6 * William Jolitz. 7 * 8 * Redistribution and use in source and binary forms, with or without 9 * modification, are permitted provided that the following conditions 10 * are met: 11 * 1. Redistributions of source code must retain the above copyright 12 * notice, this list of conditions and the following disclaimer. 13 * 2. Redistributions in binary form must reproduce the above copyright 14 * notice, this list of conditions and the following disclaimer in the 15 * documentation and/or other materials provided with the distribution. 16 * 3. All advertising materials mentioning features or use of this software 17 * must display the following acknowledgement: 18 * This product includes software developed by the University of 19 * California, Berkeley and its contributors. 20 * 4. Neither the name of the University nor the names of its contributors 21 * may be used to endorse or promote products derived from this software 22 * without specific prior written permission. 23 * 24 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 25 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 26 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 27 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 28 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 29 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 30 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 31 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 32 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 33 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 34 * SUCH DAMAGE. 35 * 36 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 37 * $NetBSD: SYS.h,v 1.19 2002/05/26 12:24:56 wiz Exp $ 38 */ 39 40 #include <machine/asm.h> 41 #include <sys/syscall.h> 42 43 #ifdef __STDC__ 44 #define SYSTRAP(x) movl $(SYS_ ## x),%eax; int $0x80 45 #else 46 #define SYSTRAP(x) movl $(SYS_/**/x),%eax; int $0x80 47 #endif 48 49 #ifdef __ELF__ 50 #define CERROR _C_LABEL(__cerror) 51 #define CURBRK _C_LABEL(__curbrk) 52 #else 53 #define CERROR _ASM_LABEL(cerror) 54 #define CURBRK _ASM_LABEL(curbrk) 55 #endif 56 57 #define _SYSCALL_NOERROR(x,y) \ 58 ENTRY(x); \ 59 SYSTRAP(y) 60 61 #ifdef PIC 62 #define _SYSCALL(x,y) \ 63 .text; _ALIGN_TEXT; \ 64 2: PIC_PROLOGUE; \ 65 mov PIC_GOT(CERROR), %ecx; \ 66 PIC_EPILOGUE; \ 67 jmp *%ecx; \ 68 _SYSCALL_NOERROR(x,y); \ 69 jc 2b 70 #else 71 #define _SYSCALL(x,y) \ 72 .text; _ALIGN_TEXT; \ 73 2: jmp CERROR; \ 74 _SYSCALL_NOERROR(x,y); \ 75 jc 2b 76 #endif 77 78 #define SYSCALL_NOERROR(x) \ 79 _SYSCALL_NOERROR(x,x) 80 81 #define SYSCALL(x) \ 82 _SYSCALL(x,x) 83 84 #define PSEUDO_NOERROR(x,y) \ 85 _SYSCALL_NOERROR(x,y); \ 86 ret 87 88 #define PSEUDO(x,y) \ 89 _SYSCALL(x,y); \ 90 ret 91 92 #define RSYSCALL_NOERROR(x) \ 93 PSEUDO_NOERROR(x,x) 94 95 #define RSYSCALL(x) \ 96 PSEUDO(x,x) 97 98 #ifdef WEAK_ALIAS 99 #define WSYSCALL(weak,strong) \ 100 WEAK_ALIAS(weak,strong); \ 101 PSEUDO(strong,weak) 102 #else 103 #define WSYSCALL(weak,strong) \ 104 PSEUDO(weak,weak) 105 #endif 106 107 .globl CERROR 108