1*04459484Sderaadt /* $OpenBSD: SYS.h,v 1.5 2023/12/11 22:29:24 deraadt Exp $ */ 2d6979ba5Sderaadt 3d6979ba5Sderaadt /* 4d6979ba5Sderaadt * Copyright (c) 2002,2004 Dale Rahn 5d6979ba5Sderaadt * All rights reserved. 6d6979ba5Sderaadt * 7d6979ba5Sderaadt * Redistribution and use in source and binary forms, with or without 8d6979ba5Sderaadt * modification, are permitted provided that the following conditions 9d6979ba5Sderaadt * are met: 10d6979ba5Sderaadt * 1. Redistributions of source code must retain the above copyright 11d6979ba5Sderaadt * notice, this list of conditions and the following disclaimer. 12d6979ba5Sderaadt * 2. Redistributions in binary form must reproduce the above copyright 13d6979ba5Sderaadt * notice, this list of conditions and the following disclaimer in the 14d6979ba5Sderaadt * documentation and/or other materials provided with the distribution. 15d6979ba5Sderaadt * 16d6979ba5Sderaadt * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS 17d6979ba5Sderaadt * OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED 18d6979ba5Sderaadt * WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 19d6979ba5Sderaadt * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY 20d6979ba5Sderaadt * DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 21d6979ba5Sderaadt * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 22d6979ba5Sderaadt * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 23d6979ba5Sderaadt * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 24d6979ba5Sderaadt * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 25d6979ba5Sderaadt * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26d6979ba5Sderaadt * SUCH DAMAGE. 27d6979ba5Sderaadt * 28d6979ba5Sderaadt */ 29d6979ba5Sderaadt 30d6979ba5Sderaadt #include <sys/syscall.h> 31d6979ba5Sderaadt #include <machine/asm.h> 32d6979ba5Sderaadt 3383762a71Sderaadt #define PINSYSCALL(sysno, label) \ 3483762a71Sderaadt .pushsection .openbsd.syscalls,"",@progbits ;\ 35*04459484Sderaadt .p2align 2 ;\ 3683762a71Sderaadt .long label ;\ 3783762a71Sderaadt .long sysno ;\ 3883762a71Sderaadt .popsection 3983762a71Sderaadt 40d6979ba5Sderaadt #define DL_SYSCALL(n) \ 41d6979ba5Sderaadt .global __CONCAT(_dl_,n) ;\ 42d6979ba5Sderaadt .type __CONCAT(_dl_,n), @function ;\ 43d6979ba5Sderaadt .align 16,0xcc ;\ 44d6979ba5Sderaadt __CONCAT(_dl_,n): ;\ 4512e285c6Sderaadt endbr64 ;\ 4639b8558cSmortimer RETGUARD_SETUP(_dl_##n, r11) ;\ 4739b8558cSmortimer RETGUARD_PUSH(r11) ;\ 48d6979ba5Sderaadt movl $(__CONCAT(SYS_,n)), %eax ;\ 49d6979ba5Sderaadt movq %rcx, %r10 ;\ 5083762a71Sderaadt 99: syscall ;\ 5183762a71Sderaadt PINSYSCALL(__CONCAT(SYS_,n), 99b) ;\ 5239b8558cSmortimer jnc 1f ;\ 5339b8558cSmortimer neg %rax ;\ 5439b8558cSmortimer 1: RETGUARD_POP(r11) ;\ 5539b8558cSmortimer RETGUARD_CHECK(_dl_##n, r11) ;\ 56d6979ba5Sderaadt ret 57