1 /* $OpenBSD: SYS.h,v 1.4 2012/08/22 17:19:35 pascal Exp $ */ 2 /*- 3 * Copyright (c) 1990 The Regents of the University of California. 4 * All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * William Jolitz. 8 * 9 * Redistribution and use in source and binary forms, with or without 10 * modification, are permitted provided that the following conditions 11 * are met: 12 * 1. Redistributions of source code must retain the above copyright 13 * notice, this list of conditions and the following disclaimer. 14 * 2. Redistributions in binary form must reproduce the above copyright 15 * notice, this list of conditions and the following disclaimer in the 16 * documentation and/or other materials provided with the distribution. 17 * 3. Neither the name of the University nor the names of its contributors 18 * may be used to endorse or promote products derived from this software 19 * without specific prior written permission. 20 * 21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 31 * SUCH DAMAGE. 32 * 33 * from: @(#)SYS.h 5.5 (Berkeley) 5/7/91 34 * $NetBSD: SYS.h,v 1.9 2006/01/06 06:19:20 uwe Exp $ 35 */ 36 37 #include <machine/asm.h> 38 #include <sys/syscall.h> 39 40 #ifdef __STDC__ 41 #define SYSENTRY(x) \ 42 WEAK_ALIAS(x,_thread_sys_ ## x); \ 43 ENTRY(_thread_sys_ ## x) 44 #else 45 #define SYSENTRY(x) \ 46 WEAK_ALIAS(x,_thread_sys_/**/x); \ 47 ENTRY(_thread_sys_/**/x) 48 #endif 49 50 #ifdef __STDC__ 51 #define SYSTRAP(x) \ 52 mov.l 903f, r0; \ 53 .word 0xc380; /* trapa #0x80; */ \ 54 bra 904f; \ 55 nop; \ 56 .align 2; \ 57 903: .long (SYS_ ## x); \ 58 904: 59 #else 60 #define SYSTRAP(x) \ 61 mov.l 903f, r0; \ 62 trapa #0x80; \ 63 bra 904f; \ 64 nop; \ 65 .align 2; \ 66 903: .long (SYS_/**/x); \ 67 904: 68 #endif 69 70 #define CERROR _C_LABEL(__cerror) 71 #define _CERROR _C_LABEL(___cerror) 72 73 #define _SYSCALL_NOERROR(x,y) \ 74 SYSENTRY(x); \ 75 SYSTRAP(y) 76 77 #ifdef __PIC__ 78 79 #define JUMP_CERROR \ 80 mov r0, r4; \ 81 mov.l 912f, r1; \ 82 mova 912f, r0; \ 83 mov.l 913f, r2; \ 84 add r1, r0; \ 85 mov.l @(r0, r2), r3; \ 86 jmp @r3; \ 87 nop; \ 88 .align 2; \ 89 912: .long _GLOBAL_OFFSET_TABLE_; \ 90 913: .long PIC_GOT(CERROR) 91 92 #else /* !PIC */ 93 94 #define JUMP_CERROR \ 95 mov.l 912f, r3; \ 96 jmp @r3; \ 97 mov r0, r4; \ 98 .align 2; \ 99 912: .long CERROR 100 101 #endif /* !PIC */ 102 103 #define _SYSCALL(x,y) \ 104 .text; \ 105 911: JUMP_CERROR; \ 106 _SYSCALL_NOERROR(x,y); \ 107 bf 911b 108 109 #define SYSCALL_NOERROR(x) \ 110 _SYSCALL_NOERROR(x,x) 111 112 #define SYSCALL(x) \ 113 _SYSCALL(x,x) 114 115 #define PSEUDO_NOERROR(x,y) \ 116 _SYSCALL_NOERROR(x,y); \ 117 rts; \ 118 nop 119 120 #define PSEUDO(x,y) \ 121 _SYSCALL(x,y); \ 122 rts; \ 123 nop 124 125 #define RSYSCALL_NOERROR(x) \ 126 PSEUDO_NOERROR(x,x) 127 128 #define RSYSCALL(x) \ 129 PSEUDO(x,x) 130 131 .globl CERROR 132