2015-02-19 14:50:27 +01:00
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/*
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* \brief Kernel backend for virtual machines
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* \author Stefan Kalkowski
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* \date 2015-02-10
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*/
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/*
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2017-02-20 13:23:52 +01:00
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* Copyright (C) 2015-2017 Genode Labs GmbH
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2015-02-19 14:50:27 +01:00
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*
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* This file is part of the Genode OS framework, which is distributed
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2017-02-20 13:23:52 +01:00
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* under the terms of the GNU Affero General Public License version 3.
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2015-02-19 14:50:27 +01:00
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*/
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/* core includes */
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2019-09-26 14:24:28 +02:00
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#include "thread.h"
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#include "vm.h"
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2015-02-19 14:50:27 +01:00
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2015-05-19 14:18:40 +02:00
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void Kernel::Thread::_call_new_vm()
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2015-02-19 14:50:27 +01:00
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{
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2015-05-19 14:18:40 +02:00
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Signal_context * context =
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base/core: use references instead of pointers
This patch replaces the former prominent use of pointers by references
wherever feasible. This has the following benefits:
* The contract between caller and callee becomes more obvious. When
passing a reference, the contract says that the argument cannot be
a null pointer. The caller is responsible to ensure that. Therefore,
the use of reference eliminates the need to add defensive null-pointer
checks at the callee site, which sometimes merely exist to be on the
safe side. The bottom line is that the code becomes easier to follow.
* Reference members must be initialized via an object initializer,
which promotes a programming style that avoids intermediate object-
construction states. Within core, there are still a few pointers
as member variables left though. E.g., caused by the late association
of 'Platform_thread' objects with their 'Platform_pd' objects.
* If no pointers are present as member variables, we don't need to
manually provide declarations of a private copy constructor and
an assignment operator to avoid -Weffc++ errors "class ... has
pointer data members [-Werror=effc++]".
This patch also changes a few system bindings on NOVA and Fiasco.OC,
e.g., the return value of the global 'cap_map' accessor has become a
reference. Hence, the patch touches a few places outside of core.
Fixes #3135
2019-01-24 22:00:01 +01:00
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pd().cap_tree().find<Signal_context>(user_arg_4());
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2015-05-19 14:18:40 +02:00
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if (!context) {
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user_arg_0(cap_id_invalid());
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return;
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}
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2019-03-21 13:59:30 +01:00
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_call_new<Vm>((void*)user_arg_2(), context, (void*)user_arg_3());
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2015-02-19 14:50:27 +01:00
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}
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2015-05-19 14:18:40 +02:00
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void Kernel::Thread::_call_delete_vm() { _call_delete<Vm>(); }
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2015-04-01 10:23:38 +02:00
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void Kernel::Thread::_call_run_vm()
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{
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reinterpret_cast<Vm*>(user_arg_1())->run();
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user_arg_0(0);
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2015-02-19 14:50:27 +01:00
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}
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void Kernel::Thread::_call_pause_vm()
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{
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2015-04-01 10:23:38 +02:00
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reinterpret_cast<Vm*>(user_arg_1())->pause();
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user_arg_0(0);
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2015-02-19 14:50:27 +01:00
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}
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