1 /* $OpenBSD: ptrace.c,v 1.9 2020/07/06 07:31:51 kettenis Exp $ */ 2 /* 3 * Copyright (c) 2004, Mark Kettenis. 4 * Copyright (c) 2004, Miodrag Vallat. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR 17 * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES 18 * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. 19 * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT 21 * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, 22 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY 23 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT 24 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF 25 * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. 26 */ 27 28 #include <sys/types.h> 29 #include <sys/ptrace.h> 30 #include <sys/wait.h> 31 32 #include <machine/reg.h> 33 34 #include <signal.h> 35 #include <stdio.h> 36 #include <stdlib.h> 37 #include <unistd.h> 38 39 /* 40 * This tests checks whether ptrace will correctly cope with unaligned pc. 41 */ 42 int 43 main(void) 44 { 45 pid_t pid; 46 int status; 47 48 pid = fork(); 49 if (pid == 0) { 50 ptrace(PT_TRACE_ME, 0, 0, 0); 51 raise(SIGTRAP); 52 exit(EXIT_FAILURE); 53 } else { 54 struct reg regs; 55 56 waitpid(pid, &status, 0); 57 ptrace(PT_GETREGS, pid, (caddr_t)®s, 0); 58 59 /* 60 * Make sure amd64 is tested before i386 61 */ 62 63 #if defined(__alpha__) 64 regs.r_regs[R_ZERO]|= 0x07; 65 #elif defined(__x86_64__) 66 regs.r_rip |= 0x07; 67 #elif defined(__arm__) 68 regs.r_pc |= 0x03; 69 #elif defined(__hppa__) 70 regs.r_pcoqh |= 0x03; 71 regs.r_pcoqt |= 0x03; 72 #elif defined(__i386__) 73 regs.r_eip |= 0x03; 74 #elif defined(__mips64__) 75 regs.r_regs[PC] |= 0x03; 76 #elif defined(__powerpc64__) 77 regs.r_pc |= 0x03; 78 #elif defined(__powerpc__) 79 regs.pc |= 0x03; 80 #elif defined(__sh__) 81 regs.r_spc |= 0x01; 82 #elif defined( __sparcv9__) 83 regs.r_pc |= 0x07; 84 regs.r_npc |= 0x07; 85 #elif defined( __m88k__) 86 /* 87 * The following code is for 88100 only, but should work with 88 * 88110 too, even though it sets the DELAY bit in exip. 89 */ 90 regs.sxip |= 0x03; 91 regs.snip |= 0x03; 92 regs.sfip |= 0x03; 93 #endif 94 ptrace(PT_SETREGS, pid, (caddr_t)®s, 0); 95 ptrace(PT_CONTINUE, pid, (caddr_t)1, 0); 96 } 97 exit(EXIT_SUCCESS); 98 } 99