Process which may execute on an Intel CPU. More...

#include <IntelProcess.h>

Inheritance diagram for IntelProcess:

Public Member Functions
	IntelProcess (ProcessID id, Address entry, bool privileged, const MemoryMap &map)
	Constructor function. More...

virtual	~IntelProcess ()
	Destructor function. More...

virtual Result	initialize ()
	Initialize the Process. More...

virtual void	reset (const Address entry)
	Restart execution at the given entry point. More...

virtual void	execute (Process *previous)
	Execute the process. More...

Public Member Functions inherited from Process
	Process (ProcessID id, Address entry, bool privileged, const MemoryMap &map)
	Constructor function. More...

virtual	~Process ()
	Destructor function. More...

ProcessID	getID () const
	Retrieve our ID number. More...

ProcessID	getParent () const
	Retrieve our parent ID. More...

ProcessID	getWait () const
	Get Wait ID. More...

uint	getWaitResult () const
	Get wait result. More...

ProcessShares &	getShares ()
	Get process shares. More...

State	getState () const
	Retrieves the current state. More...

MemoryContext *	getMemoryContext ()
	Get MMU memory context. More...

bool	isPrivileged () const
	Get privilege. More...

bool	operator== (Process *proc)
	Compare two processes. More...

Private Attributes
Address	m_kernelStack
	Current kernel stack address (changes during execution). More...

Address	m_kernelStackBase
	Base kernel stack (fixed) More...

Static Private Attributes
static const Size	KernelStackSize = PAGESIZE
	Size of the kernel stack. More...

Additional Inherited Members
Public Types inherited from Process
enum	Result { Success, InvalidArgument, MemoryMapError, OutOfMemory, WakeupPending }
	Result codes. More...

enum	State { Ready, Sleeping, Waiting, Stopped }
	Represents the execution state of the Process. More...

Protected Member Functions inherited from Process
Result	wakeup ()
	Prevent process from sleeping. More...

Result	sleep (const Timer::Info *timer, bool ignoreWakeups)
	Stops the process for executing until woken up. More...

Result	wait (ProcessID id)
	Let Process wait for other Process to terminate. More...

virtual Result	join (const uint result)
	Complete waiting for another Process. More...

Result	stop ()
	Stop execution of this process. More...

Result	resume ()
	Resume execution when this process is stopped. More...

Result	raiseEvent (const struct ProcessEvent *event)
	Raise kernel event. More...

const Timer::Info &	getSleepTimer () const
	Get sleep timer. More...

void	setParent (ProcessID id)
	Set parent process ID. More...

Protected Attributes inherited from Process
const ProcessID	m_id
	Process Identifier. More...

ProcessID	m_parent
	Parent process. More...

State	m_state
	Current process status. More...

ProcessID	m_waitId
	Waits for exit of this Process. More...

uint	m_waitResult
	Wait exit result of the other Process. More...

bool	m_privileged
	Privilege level. More...

Address	m_entry
	Entry point of the program. More...

MemoryMap	m_map
	Virtual memory layout. More...

MemoryContext *	m_memoryContext
	MMU memory context. More...

Size	m_wakeups
	Number of wakeups received. More...

Timer::Info	m_sleepTimer
	Sleep timer value. More...

ProcessShares	m_shares
	Contains virtual memory shares between this process and others. More...

MemoryChannel *	m_kernelChannel
	Channel for sending kernel events to the Process. More...

Detailed Description

Process which may execute on an Intel CPU.

Todo:: IntelProcess currently has a per-process kernel stack, while the ARMProcess does not. The kernel stack should not be needed anymore, and can be removed to reduce overhead.

Definition at line 38 of file IntelProcess.h.

Constructor & Destructor Documentation

◆ IntelProcess()

IntelProcess::IntelProcess	(	ProcessID	id,
		Address	entry,
		bool	privileged,
		const MemoryMap &	map
	)

Constructor function.

Parameters

id	Process Identifier.
entry	Initial EIP register value.
privileged	If true, the Process has unlimited access to hardware.
map	Virtual memory layout.

Definition at line 25 of file IntelProcess.cpp.

◆ ~IntelProcess()

IntelProcess::~IntelProcess ( )

virtual

Destructor function.

Definition at line 92 of file IntelProcess.cpp.

References Kernel::getAllocator(), WeakSingleton< Kernel >::instance(), KernelStackSize, m_kernelStackBase, SplitAllocator::release(), and SplitAllocator::toPhysical().

Member Function Documentation

◆ execute()

void IntelProcess::execute ( Process * previous )

virtual

Execute the process.

Saves and restores registers, then perform a context switch.

Implements Process.

Definition at line 142 of file IntelProcess.cpp.

References MemoryContext::activate(), TSS::esp0, kernelTss, m_kernelStack, m_kernelStackBase, Process::m_memoryContext, switchCoreState(), and ZERO.

◆ initialize()

Process::Result IntelProcess::initialize ( )

virtual

Initialize the Process.

Allocates various (architecture specific) resources, creates MMU context and stacks.

Returns: Result code

Reimplemented from Process.

Definition at line 30 of file IntelProcess.cpp.

References Memory::Range::access, Allocator::Range::address, Allocator::Range::alignment, ERROR, MemoryContext::initialize(), Process::initialize(), WeakSingleton< Kernel >::instance(), KernelStackSize, Process::m_entry, m_kernelStackBase, Process::m_map, Process::m_memoryContext, MemoryContext::mapRangeContiguous(), Process::MemoryMapError, Process::OutOfMemory, PAGESIZE, Memory::Range::phys, MemoryMap::range(), Memory::Readable, reset(), Memory::Range::size, Allocator::Range::size, MemoryContext::Success, Allocator::Success, Memory::User, MemoryMap::UserStack, and Memory::Writable.

◆ reset()

void IntelProcess::reset ( const Address entry )

virtual

Restart execution at the given entry point.

Parameters

entry Address to begin execution.

Implements Process.

Definition at line 99 of file IntelProcess.cpp.

References IRQRegs0::cs, IRQRegs3::cs, SegRegs::ds, CPURegs::ebp, IRQRegs0::eflags, IRQRegs3::eflags, IRQRegs0::eip, IRQRegs3::eip, SegRegs::es, CPURegs::esp0, IRQRegs3::esp3, SegRegs::fs, SegRegs::gs, INTEL_EFLAGS_DEFAULT, INTEL_EFLAGS_IRQ, CPUState::irq, KERNEL_CS_SEL, KERNEL_DS_SEL, loadCoreState(), Process::m_entry, m_kernelStack, m_kernelStackBase, Process::m_map, Process::m_privileged, MEMALIGN, MemoryMap::range(), CPUState::regs, CPUState::seg, MemoryBlock::set(), Memory::Range::size, SegRegs::ss0, IRQRegs3::ss3, USER_CS_SEL, USER_DS_SEL, MemoryMap::UserStack, and Memory::Range::virt.

Referenced by initialize().

Field Documentation

◆ KernelStackSize

const Size IntelProcess::KernelStackSize = PAGESIZE

staticprivate

Size of the kernel stack.

Definition at line 43 of file IntelProcess.h.

Referenced by initialize(), and ~IntelProcess().

◆ m_kernelStack

Address IntelProcess::m_kernelStack

private

Current kernel stack address (changes during execution).

Definition at line 89 of file IntelProcess.h.

Referenced by execute(), and reset().

◆ m_kernelStackBase

Address IntelProcess::m_kernelStackBase

private

Base kernel stack (fixed)

Definition at line 92 of file IntelProcess.h.

Referenced by execute(), initialize(), reset(), and ~IntelProcess().

The documentation for this class was generated from the following files:

kernel/intel/IntelProcess.h
kernel/intel/IntelProcess.cpp

Public Member Functions

Private Attributes

Static Private Attributes

Additional Inherited Members

Detailed Description

Constructor & Destructor Documentation

◆ IntelProcess()

◆ ~IntelProcess()

Member Function Documentation

◆ execute()

◆ initialize()

◆ reset()

Field Documentation

◆ KernelStackSize

◆ m_kernelStack

◆ m_kernelStackBase