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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* ARM 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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namespace Fiasco {
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#include <l4/sys/utcb.h>
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}
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enum Exceptions { EX_REGS = 0x500000 };
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void Genode::Ipc_pager::_parse_exception()
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{
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if (Fiasco::l4_utcb_exc()->err == EX_REGS)
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_type = PAUSE;
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else
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_type = EXCEPTION;
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}
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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.pc;
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state.sp = _regs.sp;
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state.r0 = _regs.r[0];
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state.r1 = _regs.r[1];
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state.r2 = _regs.r[2];
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state.r3 = _regs.r[3];
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state.r4 = _regs.r[4];
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state.r5 = _regs.r[5];
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state.r6 = _regs.r[6];
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state.r7 = _regs.r[7];
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state.r8 = _regs.r[8];
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state.r9 = _regs.r[9];
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state.r10 = _regs.r[10];
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state.r11 = _regs.r[11];
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state.r12 = _regs.r[12];
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state.lr = _regs.ulr;
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state.cpsr = _regs.cpsr;
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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.pc = state.ip;
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_regs.sp = state.sp;
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_regs.r[0] = state.r0;
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_regs.r[1] = state.r1;
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_regs.r[2] = state.r2;
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_regs.r[3] = state.r3;
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_regs.r[4] = state.r4;
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_regs.r[5] = state.r5;
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_regs.r[6] = state.r6;
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_regs.r[7] = state.r7;
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_regs.r[8] = state.r8;
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_regs.r[9] = state.r9;
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_regs.r[10] = state.r10;
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_regs.r[11] = state.r11;
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_regs.r[12] = state.r12;
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_regs.ulr = state.lr;
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_regs.cpsr = state.cpsr;
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}
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2017-10-13 14:26:09 +02:00
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bool Genode::Ipc_pager::exec_fault() const
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{
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return (_pf_addr & 4) && !(_pf_addr & 1);
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}
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