1 /* $OpenBSD: SYS.h,v 1.6 2011/09/05 02:56:44 guenther Exp $ */ 2 3 /*- 4 * Copyright (c) 1990 The Regents of the University of California. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to Berkeley by 8 * William Jolitz. 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. Neither the name of the University nor the names of its contributors 19 * may be used to endorse or promote products derived from this software 20 * without specific prior written permission. 21 * 22 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 23 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 24 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 25 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 26 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 27 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 28 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 29 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 30 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 31 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 32 * SUCH DAMAGE. 33 * 34 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 35 * $NetBSD: SYS.h,v 1.5 2002/06/03 18:30:32 fvdl Exp $ 36 */ 37 38 /* 39 * XXXfvdl change to use syscall/sysret. 40 */ 41 42 #include <machine/asm.h> 43 #include <sys/syscall.h> 44 45 #ifdef __STDC__ 46 47 #define SYSTRAP(x) movl $(SYS_ ## x),%eax; movq %rcx, %r10; syscall 48 #define SYSENTRY(x) \ 49 ENTRY(_thread_sys_ ## x); \ 50 .weak _C_LABEL(x); \ 51 _C_LABEL(x) = _C_LABEL(_thread_sys_ ## x) 52 #else 53 54 #define SYSTRAP(x) movl $(SYS_/**/x),%eax; movq %rcx, %r10; syscall 55 #define SYSENTRY(x) \ 56 ENTRY(_thread_sys_/**/x); \ 57 .weak _C_LABEL(x); \ 58 _C_LABEL(x) = _C_LABEL(_thread_sys_/**/x) 59 60 #endif 61 62 #define CERROR _C_LABEL(__cerror) 63 #define _CERROR _C_LABEL(___cerror) 64 #define CURBRK _C_LABEL(__curbrk) 65 66 #define _SYSCALL_NOERROR(x,y) \ 67 SYSENTRY(x); \ 68 SYSTRAP(y) 69 70 #ifdef PIC 71 #define _SYSCALL(x,y) \ 72 .text; _ALIGN_TEXT; \ 73 2: mov PIC_GOT(CERROR), %rcx; \ 74 jmp *%rcx; \ 75 _SYSCALL_NOERROR(x,y); \ 76 jc 2b 77 #else 78 #define _SYSCALL(x,y) \ 79 .text; _ALIGN_TEXT; \ 80 2: jmp CERROR; \ 81 _SYSCALL_NOERROR(x,y); \ 82 jc 2b 83 #endif 84 85 #define SYSCALL_NOERROR(x) \ 86 _SYSCALL_NOERROR(x,x) 87 88 #define SYSCALL(x) \ 89 _SYSCALL(x,x) 90 91 #define PSEUDO_NOERROR(x,y) \ 92 _SYSCALL_NOERROR(x,y); \ 93 ret 94 95 #define PSEUDO(x,y) \ 96 _SYSCALL(x,y); \ 97 ret 98 99 #define RSYSCALL_NOERROR(x) \ 100 PSEUDO_NOERROR(x,x) 101 102 #define RSYSCALL(x) \ 103 PSEUDO(x,x) 104 105 #define WSYSCALL(weak,strong) \ 106 WEAK_ALIAS(weak,strong); \ 107 PSEUDO(strong,weak) 108 109 .globl CERROR 110