1 /* 2 * Copyright (C) 2008 The Android Open Source Project 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * * Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * * Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in 12 * the documentation and/or other materials provided with the 13 * distribution. 14 * 15 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 16 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 17 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 18 * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 19 * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 20 * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 21 * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 22 * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 23 * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 24 * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 25 * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 26 * SUCH DAMAGE. 27 */ 28 #include <sys/types.h> 29 #include <sys/ptrace.h> 30 31 extern long __ptrace(int request, pid_t pid, void *addr, void *data); 32 33 long ptrace(int request, pid_t pid, void * addr, void * data) 34 { 35 switch (request) { 36 case PTRACE_PEEKUSR: 37 case PTRACE_PEEKTEXT: 38 case PTRACE_PEEKDATA: 39 { 40 long word; 41 long ret; 42 43 ret = __ptrace(request, pid, addr, &word); 44 if (ret == 0) { 45 return word; 46 } else { 47 // __ptrace will set errno for us 48 return -1; 49 } 50 } 51 52 default: 53 return __ptrace(request, pid, addr, data); 54 } 55 } 56 57 /* 58 * Hook for gdb to get notified when a thread is created 59 */ 60 #ifdef __i386__ 61 #define ATTRIBUTES __attribute__((noinline)) __attribute__((fastcall)) 62 #else 63 #define ATTRIBUTES __attribute__((noinline)) 64 #endif 65 66 void ATTRIBUTES _thread_created_hook(pid_t thread_id) 67 { 68 } 69