1d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes/* 2d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Copyright (c) 2016 Dmitry V. Levin <ldv@altlinux.org> 3d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * All rights reserved. 4d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 5d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * Redistribution and use in source and binary forms, with or without 6d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * modification, are permitted provided that the following conditions 7d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * are met: 8d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 1. Redistributions of source code must retain the above copyright 9d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer. 10d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 2. Redistributions in binary form must reproduce the above copyright 11d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * notice, this list of conditions and the following disclaimer in the 12d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * documentation and/or other materials provided with the distribution. 13d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 3. The name of the author may not be used to endorse or promote products 14d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * derived from this software without specific prior written permission. 15d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * 16d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes */ 27d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 28d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include "defs.h" 29d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes#include "ptrace.h" 30d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes 31d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesint 32d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughesupoke(int pid, unsigned long off, kernel_ulong_t val) 33d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes{ 34d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (ptrace(PTRACE_POKEUSER, pid, off, val)) { 35d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes if (errno != ESRCH) 36d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes perror_msg("upoke: PTRACE_POKEUSER pid:%d @%#lx)", pid, off); 37d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return -1; 38d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes } 39d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes return 0; 40d35df493b4e7684c50d2d2fa032ee3a7ac228009Elliott Hughes} 41