82 lines
2.9 KiB
C
82 lines
2.9 KiB
C
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/*
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* Copyright (C) 2010 The Android Open Source Project
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* * Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* * Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in
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* the documentation and/or other materials provided with the
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* distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
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* FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE
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* COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING,
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* BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS
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* OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED
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* AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT
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* OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#define __GNU_SOURCE 1
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#include <sched.h>
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#include <stdlib.h>
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#include <stdarg.h>
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#include <stdio.h>
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/* WARNING: AT THE MOMENT, THIS IS ONLY SUPPORTED ON ARM
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*/
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extern int __bionic_clone(unsigned long clone_flags,
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void* newsp,
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int *parent_tidptr,
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void *new_tls,
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int *child_tidptr,
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int (*fn)(void *),
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void *arg);
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extern void _exit_thread(int retCode);
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/* this function is called from the __bionic_clone
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* assembly fragment to call the thread function
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* then exit. */
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extern void
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__bionic_clone_entry( int (*fn)(void *), void *arg )
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{
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int ret = (*fn)(arg);
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_exit_thread(ret);
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}
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int
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clone(int (*fn)(void *), void *child_stack, int flags, void* arg, ...)
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{
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va_list args;
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int *parent_tidptr = NULL;
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void *new_tls = NULL;
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int *child_tidptr = NULL;
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int ret;
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/* extract optional parameters - they are cummulative */
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va_start(args, arg);
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if (flags & (CLONE_PARENT_SETTID|CLONE_SETTLS|CLONE_CHILD_SETTID)) {
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parent_tidptr = va_arg(args, int*);
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}
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if (flags & (CLONE_SETTLS|CLONE_CHILD_SETTID)) {
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new_tls = va_arg(args, void*);
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}
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if (flags & CLONE_CHILD_SETTID) {
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child_tidptr = va_arg(args, int*);
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}
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va_end(args);
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ret = __bionic_clone(flags, child_stack, parent_tidptr, new_tls, child_tidptr, fn, arg);
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return ret;
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}
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