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The CPU session interfaces comes with the ability to install an exception handler per thread. This patch enhances the feature with the provision of a default signal handler that is used if no thread-specific handler is installed. The default signal handler can be set by specifying an invalid thread capability and a valid signal context capability. Furthermore, this patch relaxes the requirement of the order of the calls of 'exception_handler' and 'set_pager'. Originally, the exception handler could be installed not before setting a pager. Now, we remember the installed exception handler in the 'Cpu_thread' and propagate to to the platform thread at a later time.
68 lines
1.8 KiB
C++
68 lines
1.8 KiB
C++
/*
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* \brief Pseudo RM-session client stub targeting the process-local RM service
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* \author Norman Feske
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* \date 2011-11-21
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*/
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/*
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* Copyright (C) 2011-2012 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 General Public License version 2.
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*/
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#ifndef _INCLUDE__RM_SESSION__CLIENT_H_
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#define _INCLUDE__RM_SESSION__CLIENT_H_
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#include <rm_session/capability.h>
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namespace Genode {
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struct Rm_session_client : Rm_session
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{
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Rm_session_capability const _cap;
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/**
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* Return pointer to locally implemented RM session
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*
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* \throw Local_interface::Non_local_capability
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*/
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Rm_session *_local() const { return Rm_session_capability::deref(_cap); }
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explicit Rm_session_client(Rm_session_capability session)
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: _cap(session) { }
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Local_addr attach(Dataspace_capability ds, size_t size, off_t offset,
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bool use_local_addr, Local_addr local_addr,
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bool executable = false)
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{
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return _local()->attach(ds, size, offset, use_local_addr,
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local_addr, executable);
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}
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void detach(Local_addr local_addr) {
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return _local()->detach(local_addr); }
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Pager_capability add_client(Thread_capability thread) {
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return _local()->add_client(thread); }
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void fault_handler(Signal_context_capability handler)
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{
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/*
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* On Linux, page faults are never reflected to RM clients. They
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* are always handled by the kernel. If a segmentation fault
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* occurs, this condition is being reflected as a CPU exception
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* to the handler registered via 'Cpu_session::exception_handler'.
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*/
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}
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State state() {
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return _local()->state(); }
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Dataspace_capability dataspace() {
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return _local()->dataspace(); }
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};
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}
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#endif /* _INCLUDE__RM_SESSION__CLIENT_H_ */
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