1 /* 2 * Copyright (C) 2010 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 #define __GNU_SOURCE 1 29 #include <sched.h> 30 #include <stdlib.h> 31 #include <stdarg.h> 32 #include <stdio.h> 33 34 /* WARNING: AT THE MOMENT, THIS IS ONLY SUPPORTED ON ARM 35 */ 36 37 extern int __bionic_clone(unsigned long clone_flags, 38 void* newsp, 39 int *parent_tidptr, 40 void *new_tls, 41 int *child_tidptr, 42 int (*fn)(void *), 43 void *arg); 44 45 extern void _exit_thread(int retCode); 46 47 /* this function is called from the __bionic_clone 48 * assembly fragment to call the thread function 49 * then exit. */ 50 extern void 51 __bionic_clone_entry( int (*fn)(void *), void *arg ) 52 { 53 int ret = (*fn)(arg); 54 _exit_thread(ret); 55 } 56 57 int 58 clone(int (*fn)(void *), void *child_stack, int flags, void* arg, ...) 59 { 60 va_list args; 61 int *parent_tidptr = NULL; 62 void *new_tls = NULL; 63 int *child_tidptr = NULL; 64 int ret; 65 66 /* extract optional parameters - they are cummulative */ 67 va_start(args, arg); 68 if (flags & (CLONE_PARENT_SETTID|CLONE_SETTLS|CLONE_CHILD_SETTID)) { 69 parent_tidptr = va_arg(args, int*); 70 } 71 if (flags & (CLONE_SETTLS|CLONE_CHILD_SETTID)) { 72 new_tls = va_arg(args, void*); 73 } 74 if (flags & CLONE_CHILD_SETTID) { 75 child_tidptr = va_arg(args, int*); 76 } 77 va_end(args); 78 79 ret = __bionic_clone(flags, child_stack, parent_tidptr, new_tls, child_tidptr, fn, arg); 80 return ret; 81 } 82
