10f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare/* 20f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * Copyright (C) 2008 The Android Open Source Project 30f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * All rights reserved. 40f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * 50f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * Redistribution and use in source and binary forms, with or without 60f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * modification, are permitted provided that the following conditions 70f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * are met: 80f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * * Redistributions of source code must retain the above copyright 90f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * notice, this list of conditions and the following disclaimer. 100f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * * Redistributions in binary form must reproduce the above copyright 110f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * notice, this list of conditions and the following disclaimer in 120f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * the documentation and/or other materials provided with the 130f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * distribution. 140f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * 150f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS 160f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT 170f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS 180f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE 190f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, 200f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, 210f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS 220f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED 230f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, 240f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT 250f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 260f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare * SUCH DAMAGE. 270f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare */ 28c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes 2998b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes#include <stdarg.h> 300f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare#include <sys/ptrace.h> 310f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare 3298b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughesextern "C" long __ptrace(int req, pid_t pid, void* addr, void* data); 330f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare 3498b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hugheslong ptrace(int req, ...) { 3598b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes bool is_peek = (req == PTRACE_PEEKUSR || req == PTRACE_PEEKTEXT || req == PTRACE_PEEKDATA); 3698b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes long peek_result; 37c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes 3898b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes va_list args; 3998b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes va_start(args, req); 4098b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes pid_t pid = va_arg(args, pid_t); 4198b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes void* addr = va_arg(args, void*); 4298b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes void* data; 4398b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes if (is_peek) { 4498b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes data = &peek_result; 4598b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes } else { 4698b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes data = va_arg(args, void*); 47c3f114037dbf028896310609fd28cf2b3da99c4dElliott Hughes } 4898b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes va_end(args); 4998b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes 5098b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes long result = __ptrace(req, pid, addr, data); 5198b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes if (is_peek && result == 0) { 5298b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes return peek_result; 5398b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes } 5498b088dce70a2625d5cfa1872e427af5f06bfd99Elliott Hughes return result; 550f2dc2b60cf684f58eefda51b7442c44c10aa492Bruce Beare} 56