109 lines
3.0 KiB
C++
109 lines
3.0 KiB
C++
/**
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* \brief Implementations for the start of a thread
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* \author Martin Stein
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* \author Stefan Kalkowski
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* \date 2012-02-12
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*/
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/*
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* Copyright (C) 2012-2017 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/log.h>
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#include <base/sleep.h>
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#include <base/env.h>
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#include <cpu_thread/client.h>
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#include <deprecated/env.h>
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/* base-internal includes */
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#include <base/internal/stack_allocator.h>
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#include <base/internal/native_utcb.h>
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#include <base/internal/globals.h>
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using namespace Genode;
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namespace Hw {
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extern Ram_dataspace_capability _main_thread_utcb_ds;
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extern Untyped_capability _main_thread_cap;
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}
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/************
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** Thread **
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************/
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void Thread::_init_platform_thread(size_t weight, Type type)
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{
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_init_cpu_session_and_trace_control();
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if (type == NORMAL) {
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/* create server object */
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addr_t const utcb = (addr_t)&_stack->utcb();
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_thread_cap = _cpu_session->create_thread(env_deprecated()->pd_session_cap(),
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name(), _affinity,
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Weight(weight), utcb);
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return;
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}
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/* if we got reinitialized we have to get rid of the old UTCB */
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size_t const utcb_size = sizeof(Native_utcb);
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addr_t const stack_area = stack_area_virtual_base();
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addr_t const utcb_new = (addr_t)&_stack->utcb() - stack_area;
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Region_map * const rm = env_stack_area_region_map;
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if (type == REINITIALIZED_MAIN) { rm->detach(utcb_new); }
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/* remap initial main-thread UTCB according to stack-area spec */
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try { rm->attach_at(Hw::_main_thread_utcb_ds, utcb_new, utcb_size); }
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catch(...) {
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error("failed to re-map UTCB");
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while (1) ;
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}
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/* adjust initial object state in case of a main thread */
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native_thread().cap = Hw::_main_thread_cap;
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_thread_cap = main_thread_cap();
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}
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void Thread::_deinit_platform_thread()
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{
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if (!_cpu_session)
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_cpu_session = env_deprecated()->cpu_session();
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_cpu_session->kill_thread(_thread_cap);
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/* detach userland stack */
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size_t const size = sizeof(_stack->utcb());
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addr_t utcb = Stack_allocator::addr_to_base(_stack) +
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stack_virtual_size() - size - stack_area_virtual_base();
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env_stack_area_region_map->detach(utcb);
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}
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void Thread::start()
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{
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/* attach userland stack */
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try {
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Dataspace_capability ds = Cpu_thread_client(_thread_cap).utcb();
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size_t const size = sizeof(_stack->utcb());
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addr_t dst = Stack_allocator::addr_to_base(_stack) +
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stack_virtual_size() - size - stack_area_virtual_base();
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env_stack_area_region_map->attach_at(ds, dst, size);
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} catch (...) {
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error("failed to attach userland stack");
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sleep_forever();
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}
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/* start thread with its initial IP and aligned SP */
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Cpu_thread_client(_thread_cap).start((addr_t)_thread_start, _stack->top());
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}
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void Thread::cancel_blocking()
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{
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Cpu_thread_client(_thread_cap).cancel_blocking();
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}
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