1 /* $OpenBSD: SYS.h,v 1.5 2014/06/04 20:13:49 matthew 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 #define SYSENTRY(x) \ 41 WEAK_ALIAS(x,_thread_sys_ ## x); \ 42 ENTRY(_thread_sys_ ## x) 43 44 #define SYSTRAP(x) \ 45 mov.l 903f, r0; \ 46 .word 0xc380; /* trapa #0x80; */ \ 47 bra 904f; \ 48 nop; \ 49 .align 2; \ 50 903: .long (SYS_ ## x); \ 51 904: 52 53 #define CERROR _C_LABEL(__cerror) 54 #define _CERROR _C_LABEL(___cerror) 55 56 #define _SYSCALL_NOERROR(x,y) \ 57 SYSENTRY(x); \ 58 SYSTRAP(y) 59 60 #ifdef __PIC__ 61 62 #define JUMP_CERROR \ 63 mov r0, r4; \ 64 mov.l 912f, r1; \ 65 mova 912f, r0; \ 66 mov.l 913f, r2; \ 67 add r1, r0; \ 68 mov.l @(r0, r2), r3; \ 69 jmp @r3; \ 70 nop; \ 71 .align 2; \ 72 912: .long _GLOBAL_OFFSET_TABLE_; \ 73 913: .long PIC_GOT(CERROR) 74 75 #else /* !PIC */ 76 77 #define JUMP_CERROR \ 78 mov.l 912f, r3; \ 79 jmp @r3; \ 80 mov r0, r4; \ 81 .align 2; \ 82 912: .long CERROR 83 84 #endif /* !PIC */ 85 86 #define _SYSCALL(x,y) \ 87 .text; \ 88 911: JUMP_CERROR; \ 89 _SYSCALL_NOERROR(x,y); \ 90 bf 911b 91 92 #define SYSCALL_NOERROR(x) \ 93 _SYSCALL_NOERROR(x,x) 94 95 #define SYSCALL(x) \ 96 _SYSCALL(x,x) 97 98 #define PSEUDO_NOERROR(x,y) \ 99 _SYSCALL_NOERROR(x,y); \ 100 rts; \ 101 nop 102 103 #define PSEUDO(x,y) \ 104 _SYSCALL(x,y); \ 105 rts; \ 106 nop 107 108 #define RSYSCALL_NOERROR(x) \ 109 PSEUDO_NOERROR(x,x) 110 111 #define RSYSCALL(x) \ 112 PSEUDO(x,x) 113 114 .globl CERROR 115