2011-12-22 16:19:25 +01:00
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/*
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* \brief Fiasco.OC pager framework
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* \author Stefan Kalkowski
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* \date 2011-09-08
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*
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* X86_32 specific parts, when handling cpu-exceptions.
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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) 2011-2017 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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2015-06-19 14:58:18 +02:00
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/* core includes */
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#include <ipc_pager.h>
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2011-12-22 16:19:25 +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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void Genode::Ipc_pager::get_regs(Foc_thread_state &state) const
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2011-12-22 16:19:25 +01:00
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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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state.ip = _regs.ip;
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state.sp = _regs.sp;
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state.edi = _regs.edi;
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state.esi = _regs.esi;
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state.ebp = _regs.ebp;
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state.ebx = _regs.ebx;
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state.edx = _regs.edx;
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state.ecx = _regs.ecx;
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state.eax = _regs.eax;
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state.gs = _regs.gs;
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state.fs = _regs.fs;
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state.eflags = _regs.flags;
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state.trapno = _regs.trapno;
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2011-12-22 16:19:25 +01:00
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}
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2013-09-26 11:49:00 +02:00
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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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void Genode::Ipc_pager::set_regs(Foc_thread_state const &state)
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2013-09-26 11:49:00 +02:00
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{
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_regs.ip = state.ip;
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_regs.sp = state.sp;
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_regs.edi = state.edi;
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_regs.esi = state.esi;
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_regs.ebp = state.ebp;
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_regs.ebx = state.ebx;
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_regs.edx = state.edx;
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_regs.ecx = state.ecx;
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_regs.eax = state.eax;
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_regs.gs = state.gs;
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_regs.fs = state.fs;
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_regs.flags = state.eflags;
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_regs.trapno = state.trapno;
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}
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