MaxOS::runtime::BreakPointException Class Reference

Exception handler for a hardware breakpoint. More...

#include <gdbstub.h>

Inheritance diagram for MaxOS::runtime::BreakPointException:

Public Member Functions
	BreakPointException (GDBServer *server)
	Registers a handler for the BreakPointException (interrupt 0x1)
system::cpu_status_t *	handle_interrupt (system::cpu_status_t *status) override
	Handles the interrupt 0x3 by pausing the thread.
Public Member Functions inherited from MaxOS::hardwarecommunication::ExceptionHandler
	ExceptionHandler (uint8_t interrupt_number)
	Create a new base exception handler for an interrupt.
	~ExceptionHandler ()
virtual string	get_message (system::cpu_status_t *status)
	Get an human readable error message explaining this exception.
Public Member Functions inherited from MaxOS::hardwarecommunication::InterruptHandler
virtual void	handle_interrupt ()
	Handles an interrupt.

Additional Inherited Members
Protected Member Functions inherited from MaxOS::hardwarecommunication::InterruptHandler
	InterruptHandler (uint8_t interrupt_number, int64_t redirect=-1, uint64_t redirect_index=0)
	Creates a new interrupt handler and registers it with the interrupt manager.
virtual	~InterruptHandler ()
	Destroys the interrupt handler and unregisters it from the interrupt manager.
Protected Attributes inherited from MaxOS::hardwarecommunication::InterruptHandler
uint8_t	m_interrupt_number
	The interrupt number this handler handles.

Detailed Description

Exception handler for a hardware breakpoint.

Definition at line 54 of file gdbstub.h.

Constructor & Destructor Documentation

BreakPointException()

BreakPointException::BreakPointException

(

GDBServer *

server

)

Registers a handler for the BreakPointException (interrupt 0x1)

Parameters

server

The GDB stub that will handle the exception

Definition at line 585 of file gdbstub.cpp.

: ExceptionHandler(0x3),
  m_gdb_handler(server)
{
 
}

Member Function Documentation

handle_interrupt()

cpu_status_t * BreakPointException::handle_interrupt ( system::cpu_status_t *  status )

overridevirtual

Handles the interrupt 0x3 by pausing the thread.

Parameters

status

The registers at time of exception

Returns

The state to return to

Reimplemented from MaxOS::hardwarecommunication::ExceptionHandler.

Definition at line 600 of file gdbstub.cpp.

                                                                        {
 
    // Move back
    status->rip -= 1;
    m_gdb_handler->thread_regs = *status;
    m_gdb_handler->attached_thread()->thread_state = ThreadState::WAITING;
 
    // Notify the server that it stopped
    m_gdb_handler->send_message("S05");
 
    // Dont execute further until instructed by GDB
    GlobalScheduler::current_thread()->yield();
 
    // Copy the registers back as they may have been modified elsewhere
    *status = m_gdb_handler->thread_regs;
    return status;
}

References MaxOS::runtime::GDBServer::attached_thread(), MaxOS::processes::GlobalScheduler::current_thread(), MaxOS::runtime::GDBServer::send_message(), MaxOS::processes::Thread::thread_state, and MaxOS::processes::Thread::yield().

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

• /home/runner/work/MaxOS/MaxOS/kernel/include/runtime/gdbstub.h
• /home/runner/work/MaxOS/MaxOS/kernel/src/runtime/gdbstub.cpp