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eba9c15746
The patch adjust the code of the base, base-<kernel>, and os repository.
To adapt existing components to fix violations of the best practices
suggested by "Effective C++" as reported by the -Weffc++ compiler
argument. The changes follow the patterns outlined below:
* A class with virtual functions can no longer publicly inherit base
classed without a vtable. The inherited object may either be moved
to a member variable, or inherited privately. The latter would be
used for classes that inherit 'List::Element' or 'Avl_node'. In order
to enable the 'List' and 'Avl_tree' to access the meta data, the
'List' must become a friend.
* Instead of adding a virtual destructor to abstract base classes,
we inherit the new 'Interface' class, which contains a virtual
destructor. This way, single-line abstract base classes can stay
as compact as they are now. The 'Interface' utility resides in
base/include/util/interface.h.
* With the new warnings enabled, all member variables must be explicitly
initialized. Basic types may be initialized with '='. All other types
are initialized with braces '{ ... }' or as class initializers. If
basic types and non-basic types appear in a row, it is nice to only
use the brace syntax (also for basic types) and align the braces.
* If a class contains pointers as members, it must now also provide a
copy constructor and assignment operator. In the most cases, one
would make them private, effectively disallowing the objects to be
copied. Unfortunately, this warning cannot be fixed be inheriting
our existing 'Noncopyable' class (the compiler fails to detect that
the inheriting class cannot be copied and still gives the error).
For now, we have to manually add declarations for both the copy
constructor and assignment operator as private class members. Those
declarations should be prepended with a comment like this:
/*
* Noncopyable
*/
Thread(Thread const &);
Thread &operator = (Thread const &);
In the future, we should revisit these places and try to replace
the pointers with references. In the presence of at least one
reference member, the compiler would no longer implicitly generate
a copy constructor. So we could remove the manual declaration.
Issue #465
92 lines
2.0 KiB
C++
92 lines
2.0 KiB
C++
/*
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* \brief CPU state
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* \author Norman Feske
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* \author Stefan Kalkowski
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* \author Martin Stein
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* \date 2011-05-06
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*/
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/*
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* Copyright (C) 2011-2017 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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#ifndef _INCLUDE__SPEC__ARM__CPU__CPU_STATE_H_
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#define _INCLUDE__SPEC__ARM__CPU__CPU_STATE_H_
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/* Genode includes */
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#include <base/stdint.h>
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namespace Genode {
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struct Cpu_state;
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struct Cpu_state_modes;
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}
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/**
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* Basic CPU state
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*/
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struct Genode::Cpu_state
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{
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/**
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* Native exception types
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*/
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enum Cpu_exception {
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RESET = 1,
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UNDEFINED_INSTRUCTION = 2,
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SUPERVISOR_CALL = 3,
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PREFETCH_ABORT = 4,
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DATA_ABORT = 5,
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INTERRUPT_REQUEST = 6,
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FAST_INTERRUPT_REQUEST = 7,
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};
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/**
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* Registers
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*/
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struct
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{
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addr_t r0, r1, r2, r3, r4, r5, r6,
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r7, r8, r9, r10, r11, r12; /* general purpose register 0..12 */
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addr_t sp; /* stack pointer */
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addr_t lr; /* link register */
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addr_t ip; /* instruction pointer */
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addr_t cpsr; /* current program status register */
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addr_t cpu_exception; /* last hardware exception */
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};
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};
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/**
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* Extend CPU state by banked registers
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*/
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struct Genode::Cpu_state_modes : Cpu_state
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{
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/**
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* Common banked registers for exception modes
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*/
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struct Mode_state {
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enum Mode {
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UND, /* Undefined */
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SVC, /* Supervisor */
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ABORT, /* Abort */
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IRQ, /* Interrupt */
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FIQ, /* Fast Interrupt */
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MAX
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};
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addr_t spsr; /* saved program status register */
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addr_t sp; /* banked stack pointer */
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addr_t lr; /* banked link register */
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};
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Mode_state mode[Mode_state::MAX]; /* exception mode registers */
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addr_t fiq_r[5]; /* fast-interrupt mode r8-r12 */
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};
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#endif /* _INCLUDE__SPEC__ARM__CPU__CPU_STATE_H_ */
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