1 /* $OpenBSD: SYS.h,v 1.10 2001/09/20 21:13:27 drahn Exp $ */ 2 /*- 3 * Copyright (c) 1994 4 * Andrew Cagney. All rights reserved. 5 * 6 * This code is derived from software contributed to Berkeley by 7 * Ralph Campbell. 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. All advertising materials mentioning features or use of this software 18 * must display the following acknowledgement: 19 * This product includes software developed by the University of 20 * California, Berkeley and its contributors. 21 * 4. Neither the name of the University nor the names of its contributors 22 * may be used to endorse or promote products derived from this software 23 * without specific prior written permission. 24 * 25 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND 26 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 27 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 28 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE 29 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 30 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 31 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 32 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 33 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 34 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 35 * SUCH DAMAGE. 36 * 37 * from: @(#)SYS.h 8.1 (Berkeley) 6/4/93 38 */ 39 40 #include <sys/syscall.h> 41 42 /* r0 will be a non zero errno if there was an error, while r3/r4 will 43 contain the return value */ 44 45 #include "machine/asm.h" 46 47 #ifdef __STDC__ 48 #define _CONCAT(x,y) x##y 49 #define PSEUDO_PREFIX(p,x,y) .extern cerror ; \ 50 ENTRY(p##x) \ 51 li 0, SYS_##y ; \ 52 /* sc */ 53 #else /* !__STDC__ */ 54 #define _CONCAT(x,y) x/**/y 55 #define PSEUDO_PREFIX(p,x,y) .extern cerror ; \ 56 ENTRY(p/**/x) \ 57 li 0, SYS_/**/y ; \ 58 /* sc */ 59 #endif /* !__STDC__ */ 60 #define PSEUDO_SUFFIX cmpwi 0, 0 ; \ 61 beqlr+ ; \ 62 b PIC_PLT(_ASM_LABEL(cerror)) 63 64 #define PSEUDO_NOERROR_SUFFIX blr 65 66 #define SUFFIX PSEUDO_SUFFIX 67 68 #define ALIAS(x,y) .weak y; .set y,_CONCAT(x,y); 69 70 #define PREFIX(x) ALIAS(_thread_sys_,x) \ 71 PSEUDO_PREFIX(_thread_sys_,x,x) 72 #define PREFIX2(x,y) ALIAS(_thread_sys_,x) \ 73 PSEUDO_PREFIX(_thread_sys_,x,y) 74 #define PSEUDO_NOERROR(x,y) ALIAS(_thread_sys_,x) \ 75 PSEUDO_PREFIX(_thread_sys_,x,y) ; \ 76 sc ; \ 77 PSEUDO_NOERROR_SUFFIX 78 79 #define PSEUDO(x,y) ALIAS(_thread_sys_,x) \ 80 PSEUDO_PREFIX(_thread_sys_,x,y) ; \ 81 sc ; \ 82 PSEUDO_SUFFIX 83 84 #define RSYSCALL(x) PSEUDO(x,x) 85