SYS.h revision 1.21
1 /* $NetBSD: SYS.h,v 1.21 2007/03/09 14:30:45 ad Exp $ */ 2 3 /*- 4 * Copyright (c) 2007 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Andrew Doran. 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 * 3. All advertising materials mentioning features or use of this software 19 * must display the following acknowledgement: 20 * This product includes software developed by the NetBSD 21 * Foundation, Inc. and its contributors. 22 * 4. Neither the name of The NetBSD Foundation nor the names of its 23 * contributors may be used to endorse or promote products derived 24 * from this software without specific prior written permission. 25 * 26 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 27 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 28 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 29 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 30 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 31 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 32 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 33 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 34 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 35 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 36 * POSSIBILITY OF SUCH DAMAGE. 37 */ 38 39 /*- 40 * Copyright (c) 1990 The Regents of the University of California. 41 * All rights reserved. 42 * 43 * This code is derived from software contributed to Berkeley by 44 * William Jolitz. 45 * 46 * Redistribution and use in source and binary forms, with or without 47 * modification, are permitted provided that the following conditions 48 * are met: 49 * 1. Redistributions of source code must retain the above copyright 50 * notice, this list of conditions and the following disclaimer. 51 * 2. Redistributions in binary form must reproduce the above copyright 52 * notice, this list of conditions and the following disclaimer in the 53 * documentation and/or other materials provided with the distribution. 54 * 3. Neither the name of the University nor the names of its contributors 55 * may be used to endorse or promote products derived from this software 56 * without specific prior written permission. 57 * 58 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 59 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 60 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 61 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 62 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 63 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 64 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 65 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 66 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 67 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 68 * SUCH DAMAGE. 69 * 70 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 71 */ 72 73 #include <machine/asm.h> 74 #include <sys/syscall.h> 75 76 #ifdef __STDC__ 77 #define _SYSNAM(x) $(SYS_ ## x) 78 #else 79 #define _SYSNAM(x) $(SYS_/**/x) 80 #endif 81 82 #define OSYSTRAP(x) \ 83 movl _SYSNAM(x),%eax ;\ 84 int $0x80 85 86 #ifdef I686_LIBC 87 #define SYSTRAP(x) \ 88 pushl %ebx ;\ 89 movl _SYSNAM(x),%eax ;\ 90 movl $123f,%edx ;\ 91 movl %esp,%ecx ;\ 92 sysenter ;\ 93 123: movl %ebx,%edx ;\ 94 popl %ebx 95 #else /* I686_LIBC */ 96 #define SYSTRAP(x) OSYSTRAP(x) 97 #endif /* I686_LIBC */ 98 99 #ifdef __ELF__ 100 #define CERROR _C_LABEL(__cerror) 101 #define CURBRK _C_LABEL(__curbrk) 102 #else 103 #define CERROR _ASM_LABEL(cerror) 104 #define CURBRK _ASM_LABEL(curbrk) 105 #endif 106 107 #define _SYSCALL_NOERROR(x,y) \ 108 ENTRY(x); \ 109 SYSTRAP(y) 110 111 #ifdef PIC 112 #define _SYSCALL(x,y) \ 113 .text; _ALIGN_TEXT; \ 114 2: PIC_PROLOGUE; \ 115 mov PIC_GOT(CERROR), %ecx; \ 116 PIC_EPILOGUE; \ 117 jmp *%ecx; \ 118 _SYSCALL_NOERROR(x,y); \ 119 jc 2b 120 #else 121 #define _SYSCALL(x,y) \ 122 .text; _ALIGN_TEXT; \ 123 2: jmp CERROR; \ 124 _SYSCALL_NOERROR(x,y); \ 125 jc 2b 126 #endif 127 128 #define SYSCALL_NOERROR(x) \ 129 _SYSCALL_NOERROR(x,x) 130 131 #define SYSCALL(x) \ 132 _SYSCALL(x,x) 133 134 #define PSEUDO_NOERROR(x,y) \ 135 _SYSCALL_NOERROR(x,y); \ 136 ret 137 138 #define PSEUDO(x,y) \ 139 _SYSCALL(x,y); \ 140 ret 141 142 #define RSYSCALL_NOERROR(x) \ 143 PSEUDO_NOERROR(x,x) 144 145 #define RSYSCALL(x) \ 146 PSEUDO(x,x) 147 148 #ifdef WEAK_ALIAS 149 #define WSYSCALL(weak,strong) \ 150 WEAK_ALIAS(weak,strong); \ 151 PSEUDO(strong,weak) 152 #else 153 #define WSYSCALL(weak,strong) \ 154 PSEUDO(weak,weak) 155 #endif 156 157 .globl CERROR 158
Indexes created Fri Sep 26 20:09:58 GMT 2025