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. Neither the name of the University nor the names of its contributors 17 * may be used to endorse or promote products derived from this software 18 * without specific prior written permission. 19 * 20 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 21 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 22 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 23 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 24 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 25 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 26 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 27 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 28 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 29 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 30 * SUCH DAMAGE. 31 * 32 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 33 * $NetBSD: SYS.h,v 1.20 2003/08/07 16:42:06 agc Exp $ 34 */ 35 36 #include <machine/asm.h> 37 #include <sys/syscall.h> 38 39 #ifdef __STDC__ 40 #define SYSTRAP(x) movl $(SYS_ ## x),%eax; int $0x80 41 #else 42 #define SYSTRAP(x) movl $(SYS_/**/x),%eax; int $0x80 43 #endif 44 45 #ifdef __ELF__ 46 #define CERROR _C_LABEL(__cerror) 47 #define CURBRK _C_LABEL(__curbrk) 48 #else 49 #define CERROR _ASM_LABEL(cerror) 50 #define CURBRK _ASM_LABEL(curbrk) 51 #endif 52 53 #define _SYSCALL_NOERROR(x,y) \ 54 ENTRY(x); \ 55 SYSTRAP(y) 56 57 #ifdef PIC 58 #define _SYSCALL(x,y) \ 59 .text; _ALIGN_TEXT; \ 60 2: PIC_PROLOGUE; \ 61 mov PIC_GOT(CERROR), %ecx; \ 62 PIC_EPILOGUE; \ 63 jmp *%ecx; \ 64 _SYSCALL_NOERROR(x,y); \ 65 jc 2b 66 #else 67 #define _SYSCALL(x,y) \ 68 .text; _ALIGN_TEXT; \ 69 2: jmp CERROR; \ 70 _SYSCALL_NOERROR(x,y); \ 71 jc 2b 72 #endif 73 74 #define SYSCALL_NOERROR(x) \ 75 _SYSCALL_NOERROR(x,x) 76 77 #define SYSCALL(x) \ 78 _SYSCALL(x,x) 79 80 #define PSEUDO_NOERROR(x,y) \ 81 _SYSCALL_NOERROR(x,y); \ 82 ret 83 84 #define PSEUDO(x,y) \ 85 _SYSCALL(x,y); \ 86 ret 87 88 #define RSYSCALL_NOERROR(x) \ 89 PSEUDO_NOERROR(x,x) 90 91 #define RSYSCALL(x) \ 92 PSEUDO(x,x) 93 94 #ifdef WEAK_ALIAS 95 #define WSYSCALL(weak,strong) \ 96 WEAK_ALIAS(weak,strong); \ 97 PSEUDO(strong,weak) 98 #else 99 #define WSYSCALL(weak,strong) \ 100 PSEUDO(weak,weak) 101 #endif 102 103 .globl CERROR 104