1 /* $OpenBSD: SYS.h,v 1.6 2023/12/11 22:29:24 deraadt Exp $ */ 2 3 /* 4 * Copyright (c) 2013 Miodrag Vallat. 5 * 6 * Permission to use, copy, modify, and distribute this software for any 7 * purpose with or without fee is hereby granted, provided that the above 8 * copyright notice and this permission notice appear in all copies. 9 * 10 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES 11 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF 12 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR 13 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES 14 * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN 15 * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF 16 * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. 17 */ 18 /* 19 * Copyright (c) 2006 Dale Rahn 20 * 21 * Redistribution and use in source and binary forms, with or without 22 * modification, are permitted provided that the following conditions 23 * are met: 24 * 1. Redistributions of source code must retain the above copyright 25 * notice, this list of conditions and the following disclaimer. 26 * 2. Redistributions in binary form must reproduce the above copyright 27 * notice, this list of conditions and the following disclaimer in the 28 * documentation and/or other materials provided with the distribution. 29 * 30 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 31 * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 32 * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 33 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 34 * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 35 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 36 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 37 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 38 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 39 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 40 * SUCH DAMAGE. 41 * 42 */ 43 44 #include <machine/asm.h> 45 #include <sys/syscall.h> 46 47 #define PINSYSCALL(sysno, label) \ 48 .pushsection .openbsd.syscalls,"",@progbits ;\ 49 .p2align 2 ;\ 50 .long label ;\ 51 .long sysno ;\ 52 .popsection 53 54 #define __CONCAT(p,x) p##x 55 #define __ENTRY(p,x) ENTRY(__CONCAT(p,x)) 56 #define __SYSCALLNAME(p,x) __CONCAT(p,x) 57 58 #define __DO_SYSCALL(x) \ 59 or %r13, %r0, __SYSCALLNAME(SYS_,x) ;\ 60 99: tb0 0, %r0, 450 ;\ 61 PINSYSCALL(__SYSCALLNAME(SYS_,x), 99b) 62 63 /* 64 * m88k syscall return ABI requires the same amount of ASM 65 * whether or not the syscall can possibly fail, so there's 66 * no benefit to a DL_SYSCALL_NOERR() macro. 67 */ 68 #define DL_SYSCALL(n) \ 69 __ENTRY(_dl_,n) ;\ 70 __DO_SYSCALL(n) ;\ 71 subu %r2, %r0, %r2 /* return -errno; */ ;\ 72 jmp %r1 ;\ 73 END(_dl_##n) 74