87 lines
2.1 KiB
C++
87 lines
2.1 KiB
C++
/*
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* \brief Implementations for the initialization of a thread
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* \author Martin stein
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* \author Stefan Kalkowski
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* \date 2013-02-15
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*/
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/*
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* Copyright (C) 2013-2017 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 Affero General Public License version 3.
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*/
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/* Genode includes */
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#include <base/thread.h>
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#include <base/env.h>
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#include <base/sleep.h>
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/* base-internal includes */
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#include <base/internal/stack.h>
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#include <base/internal/native_utcb.h>
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#include <base/internal/capability_space.h>
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using namespace Genode;
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namespace Hw {
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Ram_dataspace_capability _main_thread_utcb_ds;
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Untyped_capability _main_thread_cap;
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Untyped_capability _parent_cap;
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}
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/*****************************
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** Startup library support **
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*****************************/
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void prepare_init_main_thread()
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{
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using namespace Genode;
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using namespace Hw;
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/*
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* Make data from the startup info persistantly available by copying it
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* before the UTCB gets polluted by the following function calls.
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*/
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Native_utcb * utcb = Thread::myself()->utcb();
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_parent_cap = Capability_space::import(utcb->cap_get(Native_utcb::PARENT));
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Untyped_capability ds_cap =
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Capability_space::import(utcb->cap_get(Native_utcb::UTCB_DATASPACE));
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_main_thread_utcb_ds = reinterpret_cap_cast<Ram_dataspace>(ds_cap);
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_main_thread_cap = Capability_space::import(utcb->cap_get(Native_utcb::THREAD_MYSELF));
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}
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void prepare_reinit_main_thread() { prepare_init_main_thread(); }
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/************
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** Thread **
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************/
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/* prevent the compiler from optimizing out the 'this' pointer check */
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__attribute__((optimize("-fno-delete-null-pointer-checks")))
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Native_utcb *Thread::utcb()
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{
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if (this) { return &_stack->utcb(); }
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return utcb_main_thread();
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}
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void Thread::_thread_start()
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{
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Thread::myself()->_thread_bootstrap();
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Thread::myself()->entry();
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Thread::myself()->_join_lock.unlock();
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Genode::sleep_forever();
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}
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void Thread::_thread_bootstrap()
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{
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Kernel::capid_t capid = myself()->utcb()->cap_get(Native_utcb::THREAD_MYSELF);
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native_thread().cap = Capability_space::import(capid);
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}
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