2011-12-22 16:19:25 +01:00
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/*
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2016-01-23 14:42:55 +01:00
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* \brief Stack-specific part of the thread library
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2011-12-22 16:19:25 +01:00
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* \author Norman Feske
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2014-01-28 14:30:36 +01:00
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* \author Alexander Boettcher
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* \author Martin Stein
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2011-12-22 16:19:25 +01:00
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* \date 2010-01-19
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*
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* This part of the thread library is required by the IPC framework
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* also if no threads are used.
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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) 2010-2017 Genode Labs GmbH
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2011-12-22 16:19:25 +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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2011-12-22 16:19:25 +01:00
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*/
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2014-01-28 14:30:36 +01:00
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/* Genode includes */
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#include <util/construct_at.h>
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#include <base/env.h>
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2011-12-22 16:19:25 +01:00
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#include <base/thread.h>
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2016-01-23 14:42:55 +01:00
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/* base-internal includes */
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#include <base/internal/stack.h>
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2016-03-03 17:57:29 +01:00
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#include <base/internal/stack_area.h>
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2016-03-08 16:59:43 +01:00
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#include <base/internal/native_utcb.h>
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2016-01-23 14:42:55 +01:00
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2016-06-15 15:04:54 +02:00
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/* NOVA includes */
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#include <nova/cap_map.h>
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2014-01-28 14:30:36 +01:00
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2011-12-22 16:19:25 +01:00
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using namespace Genode;
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2014-01-28 14:30:36 +01:00
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extern addr_t __initial_sp;
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/*******************
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** local helpers **
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*******************/
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Native_utcb * main_thread_utcb()
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{
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using namespace Genode;
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return reinterpret_cast<Native_utcb *>(
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2016-03-03 17:57:29 +01:00
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stack_area_virtual_base() + stack_virtual_size() - Nova::PAGE_SIZE_BYTE);
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2014-01-28 14:30:36 +01:00
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}
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addr_t main_thread_running_semaphore() { return Nova::SM_SEL_EC; }
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2011-12-22 16:19:25 +01:00
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2014-01-28 14:30:36 +01:00
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class Initial_cap_range : public Cap_range
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{
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private:
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enum { CAP_RANGE_START = 4096 };
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public:
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Initial_cap_range() : Cap_range(CAP_RANGE_START) { }
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};
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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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Initial_cap_range &initial_cap_range()
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2014-01-28 14:30:36 +01:00
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{
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static Initial_cap_range s;
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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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return s;
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2014-01-28 14:30:36 +01:00
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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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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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cap_map().insert(initial_cap_range());
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2014-01-28 14:30:36 +01:00
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/* for Core we can't perform the following code so early */
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if (!__initial_sp) {
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2015-07-14 16:19:14 +02:00
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enum { CAP_RANGES = 32 };
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2014-01-28 14:30:36 +01:00
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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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unsigned index = initial_cap_range().base() +
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initial_cap_range().elements();
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2014-01-28 14:30:36 +01:00
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static char local[CAP_RANGES][sizeof(Cap_range)];
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for (unsigned i = 0; i < CAP_RANGES; i++) {
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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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Cap_range &range = *reinterpret_cast<Cap_range *>(local[i]);
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construct_at<Cap_range>(&range, index);
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2014-01-28 14:30:36 +01:00
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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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cap_map().insert(range);
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2014-01-28 14:30:36 +01:00
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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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index = range.base() + range.elements();
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2014-01-28 14:30:36 +01:00
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}
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}
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}
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void prepare_reinit_main_thread()
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{
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using namespace Genode;
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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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construct_at<Capability_map>(&cap_map());
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construct_at<Initial_cap_range>(&initial_cap_range());
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2014-01-28 14:30:36 +01:00
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prepare_init_main_thread();
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}
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2016-05-04 12:27:17 +02:00
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/************
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** Thread **
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************/
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2011-12-22 16:19:25 +01:00
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2019-09-18 02:04:30 +02:00
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#pragma clang diagnostic ignored "-Wtautological-undefined-compare"
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2017-04-10 19:57:38 +02:00
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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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2016-05-04 12:27:17 +02:00
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Native_utcb *Thread::utcb()
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2011-12-22 16:19:25 +01:00
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{
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/*
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* If 'utcb' is called on the object returned by 'myself',
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* the 'this' pointer may be NULL (if the calling thread is
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* the main thread). Therefore we allow this special case
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* here.
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*/
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if (this == 0) return main_thread_utcb();
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2016-01-23 14:42:55 +01:00
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return &_stack->utcb();
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2011-12-22 16:19:25 +01:00
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}
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