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0b64328944
For a main thread a thread object is created by the CRT0 before _main gets called so that _main can already run in a generic environment that, e.g., catches stack overflows as a page-fault instead of corrupting the BSS. Additionally dynamic programs have only one CRT0 - the one of the LDSO - which does the initialization for both LDSO and program. ref #989
63 lines
1.4 KiB
C++
63 lines
1.4 KiB
C++
/*
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* \brief Implementation of the core-internal Thread API via Linux threads
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* \author Norman Feske
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* \date 2006-06-13
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*/
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/*
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* Copyright (C) 2006-2013 Genode Labs GmbH
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*
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* This file is part of the Genode OS framework, which is distributed
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* under the terms of the GNU General Public License version 2.
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*/
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/* Genode includes */
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#include <base/thread.h>
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#include <base/sleep.h>
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/* Linux syscall bindings */
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#include <linux_syscalls.h>
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using namespace Genode;
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static void empty_signal_handler(int) { }
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void Thread_base::_thread_start()
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{
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/*
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* Set signal handler such that canceled system calls get not transparently
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* retried after a signal gets received.
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*/
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lx_sigaction(LX_SIGUSR1, empty_signal_handler);
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/*
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* Deliver SIGCHLD signals to no thread other than the main thread. Core's
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* main thread will handle the signals while executing the 'wait_for_exit'
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* function, which is known to not hold any locks that would interfere with
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* the handling of the signal.
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*/
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lx_sigsetmask(LX_SIGCHLD, false);
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Thread_base::myself()->entry();
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Thread_base::myself()->_join_lock.unlock();
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sleep_forever();
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}
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void Thread_base::_init_platform_thread(Type) { }
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void Thread_base::_deinit_platform_thread() { }
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void Thread_base::start()
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{
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_tid.tid = lx_create_thread(Thread_base::_thread_start, stack_top(), this);
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_tid.pid = lx_getpid();
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}
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void Thread_base::cancel_blocking() { }
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