1 /* $OpenBSD: SYS.h,v 1.7 2023/12/10 16:45:50 deraadt Exp $ */ 2 /* $NetBSD: SYS.h,v 1.8 2003/08/07 16:42:02 agc Exp $ */ 3 4 /*- 5 * Copyright (c) 1990 The Regents of the University of California. 6 * All rights reserved. 7 * 8 * This code is derived from software contributed to Berkeley by 9 * William Jolitz. 10 * 11 * Redistribution and use in source and binary forms, with or without 12 * modification, are permitted provided that the following conditions 13 * are met: 14 * 1. Redistributions of source code must retain the above copyright 15 * notice, this list of conditions and the following disclaimer. 16 * 2. Redistributions in binary form must reproduce the above copyright 17 * notice, this list of conditions and the following disclaimer in the 18 * documentation and/or other materials provided with the distribution. 19 * 3. Neither the name of the University nor the names of its contributors 20 * may be used to endorse or promote products derived from this software 21 * without specific prior written permission. 22 * 23 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 24 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 25 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 26 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 27 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 28 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 29 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 30 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 31 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 32 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 33 * SUCH DAMAGE. 34 * 35 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 36 */ 37 38 #include "DEFS.h" 39 #include <sys/syscall.h> 40 41 #define SYSENTRY(x) \ 42 .weak x; \ 43 x = _thread_sys_ ## x; \ 44 ENTRY(_thread_sys_ ## x) 45 #define SYSENTRY_HIDDEN(x) \ 46 ENTRY(_thread_sys_ ## x) 47 #define __END_HIDDEN(x) \ 48 END(_thread_sys_ ## x); \ 49 _HIDDEN_FALIAS(x, _thread_sys_ ## x); \ 50 END(_HIDDEN(x)) 51 #define __END(x) \ 52 __END_HIDDEN(x); END(x) 53 54 #define SYSTRAP(x) \ 55 ldr x8, =SYS_ ## x; \ 56 97: svc 0; \ 57 PINSYSCALL(SYS_ ## x, 97b); \ 58 dsb nsh; \ 59 isb 60 61 #define CERROR __cerror 62 63 #define _SYSCALL_NOERROR(x,y) \ 64 SYSENTRY(x); \ 65 SYSTRAP(y) 66 #define _SYSCALL_HIDDEN_NOERROR(x,y) \ 67 SYSENTRY_HIDDEN(x); \ 68 SYSTRAP(y) 69 70 #define _SYSCALL(x, y) \ 71 _SYSCALL_NOERROR(x,y); \ 72 bcs CERROR 73 #define _SYSCALL_HIDDEN(x, y) \ 74 _SYSCALL_HIDDEN_NOERROR(x,y); \ 75 bcs CERROR 76 77 #define SYSCALL_NOERROR(x) \ 78 _SYSCALL_NOERROR(x,x) 79 80 #define SYSCALL(x) \ 81 _SYSCALL(x,x) 82 83 84 #define PSEUDO_NOERROR(x,y) \ 85 SYSENTRY(x); \ 86 RETGUARD_SETUP(x, x15); \ 87 SYSTRAP(y); \ 88 RETGUARD_CHECK(x, x15); \ 89 ret; \ 90 __END(x) 91 92 #define PSEUDO(x,y) \ 93 SYSENTRY(x); \ 94 RETGUARD_SETUP(x, x15); \ 95 SYSTRAP(y); \ 96 bcs CERROR; \ 97 RETGUARD_CHECK(x, x15); \ 98 ret; \ 99 __END(x) 100 #define PSEUDO_HIDDEN(x,y) \ 101 SYSENTRY_HIDDEN(x); \ 102 RETGUARD_SETUP(x, x15); \ 103 SYSTRAP(y); \ 104 bcs CERROR; \ 105 RETGUARD_CHECK(x, x15); \ 106 ret; \ 107 __END_HIDDEN(x) 108 109 #define RSYSCALL_NOERROR(x) \ 110 PSEUDO_NOERROR(x,x) 111 112 #define RSYSCALL(x) \ 113 PSEUDO(x,x) 114 #define RSYSCALL_HIDDEN(x) \ 115 PSEUDO_HIDDEN(x,x) 116 #define SYSCALL_END(x) \ 117 __END(x) 118 #define SYSCALL_END_HIDDEN(x) \ 119 __END_HIDDEN(x) 120 121 .globl CERROR 122