1*04459484Sderaadt /* $OpenBSD: SYS.h,v 1.3 2023/12/11 22:29:25 deraadt Exp $ */ 26d91b5a8Sdrahn 36d91b5a8Sdrahn /* 46d91b5a8Sdrahn * Copyright (c) 2016 Dale Rahn <drahn@openbsd.org> 56d91b5a8Sdrahn * 66d91b5a8Sdrahn * Redistribution and use in source and binary forms, with or without 76d91b5a8Sdrahn * modification, are permitted provided that the following conditions 86d91b5a8Sdrahn * are met: 96d91b5a8Sdrahn * 1. Redistributions of source code must retain the above copyright 106d91b5a8Sdrahn * notice, this list of conditions and the following disclaimer. 116d91b5a8Sdrahn * 2. Redistributions in binary form must reproduce the above copyright 126d91b5a8Sdrahn * notice, this list of conditions and the following disclaimer in the 136d91b5a8Sdrahn * documentation and/or other materials provided with the distribution. 146d91b5a8Sdrahn * 156d91b5a8Sdrahn * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 166d91b5a8Sdrahn * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 176d91b5a8Sdrahn * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 186d91b5a8Sdrahn * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 196d91b5a8Sdrahn * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 206d91b5a8Sdrahn * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 216d91b5a8Sdrahn * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 226d91b5a8Sdrahn * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 236d91b5a8Sdrahn * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 246d91b5a8Sdrahn * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 256d91b5a8Sdrahn * SUCH DAMAGE. 266d91b5a8Sdrahn * 276d91b5a8Sdrahn */ 286d91b5a8Sdrahn 296d91b5a8Sdrahn #include <machine/asm.h> 306d91b5a8Sdrahn #include <sys/syscall.h> 316d91b5a8Sdrahn 3283762a71Sderaadt #define PINSYSCALL(sysno, label) \ 3383762a71Sderaadt .pushsection .openbsd.syscalls,"",@progbits ;\ 34*04459484Sderaadt .p2align 2 ;\ 3583762a71Sderaadt .long label ;\ 3683762a71Sderaadt .long sysno ;\ 3783762a71Sderaadt .popsection 3883762a71Sderaadt 396d91b5a8Sdrahn #define SYSTRAP(x) \ 406d91b5a8Sdrahn li t0, SYS_ ## x ;\ 4183762a71Sderaadt 99: ecall ;\ 4283762a71Sderaadt PINSYSCALL(SYS_ ## x, 99b) 436d91b5a8Sdrahn /* XXX fence */ 446d91b5a8Sdrahn 456d91b5a8Sdrahn #define DL_SYSCALL(n) \ 466d91b5a8Sdrahn .global __CONCAT(_dl_,n) ;\ 476d91b5a8Sdrahn .type __CONCAT(_dl_,n)%function ;\ 486d91b5a8Sdrahn __CONCAT(_dl_,n): ;\ 496d91b5a8Sdrahn RETGUARD_SETUP(__CONCAT(_dl_,n), x15) ;\ 506d91b5a8Sdrahn SYSTRAP(n) ;\ 516d91b5a8Sdrahn beqz t0, 1f ;\ 526d91b5a8Sdrahn sub a0, zero, a0 /* r0 = -errno */ ;\ 536d91b5a8Sdrahn 1: ;\ 546d91b5a8Sdrahn RETGUARD_CHECK(__CONCAT(_dl_,n), x15) ;\ 556d91b5a8Sdrahn ret 56