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b49e588c1c
This patch replaces the former 'Pd_session::bind_thread' function by a PD-capability argument of the 'Cpu_session::create_thread' function, and removes the ancient thread-start protocol via 'Rm_session::add_client' and 'Cpu_session::set_pager'. Threads are now bound to PDs at their creation time and implicitly paged according to the address space of the PD. Note the API change: This patch changes the signature of the 'Child' and 'Process' constructors. There is a new 'address_space' argument, which represents the region map representing the child's address space. It is supplied separately to the PD session capability (which principally can be invoked to obtain the PD's address space) to allow the population of the address space without relying on an 'Pd_session::address_space' RPC call. Furthermore, a new (optional) env_pd argument allows the explicit overriding of the PD capability handed out to the child as part of its environment. It can be used to intercept the interaction of the child with its PD session at core. This is used by Noux. Issue #1938
233 lines
6.7 KiB
C++
233 lines
6.7 KiB
C++
/*
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* \brief Protection domain (PD) session interface
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* \author Christian Helmuth
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* \author Norman Feske
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* \date 2006-06-27
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*
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* A pd session represents the protection domain of a program.
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*/
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/*
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* Copyright (C) 2006-2013 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__PD_SESSION__PD_SESSION_H_
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#define _INCLUDE__PD_SESSION__PD_SESSION_H_
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#include <base/exception.h>
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#include <thread/capability.h>
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#include <session/session.h>
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#include <signal_source/signal_source.h>
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#include <region_map/region_map.h>
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namespace Genode {
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struct Pd_session;
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struct Parent;
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struct Signal_context;
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}
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struct Genode::Pd_session : Session
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{
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static const char *service_name() { return "PD"; }
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virtual ~Pd_session() { }
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/**
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* Assign parent to protection domain
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*
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* \param parent capability of parent interface
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*/
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virtual void assign_parent(Capability<Parent> parent) = 0;
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/**
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* Assign PCI device to PD
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*
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* The specified address has to refer to the locally mapped PCI
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* configuration space of the device.
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*
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* This function is solely used on the NOVA kernel.
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*/
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virtual bool assign_pci(addr_t pci_config_memory_address, uint16_t bdf) = 0;
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/********************************
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** Support for the signal API **
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********************************/
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typedef Capability<Signal_source> Signal_source_capability;
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class Out_of_metadata : public Exception { };
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class Invalid_signal_source : public Exception { };
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/**
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* Create a new signal source
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*
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* \return a cap that acts as reference to the created source
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*
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* The signal source provides an interface to wait for incoming signals.
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*
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* \throw Out_of_metadata
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*/
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virtual Signal_source_capability alloc_signal_source() = 0;
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/**
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* Free a signal source
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*
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* \param cap capability of the signal source to destroy
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*/
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virtual void free_signal_source(Signal_source_capability cap) = 0;
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/**
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* Allocate signal context
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*
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* \param source signal source that shall provide the new context
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*
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*
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* \param imprint opaque value that gets delivered with signals
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* originating from the allocated signal-context capability
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* \return new signal-context capability
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*
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* \throw Out_of_metadata
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* \throw Invalid_signal_source
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*/
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virtual Capability<Signal_context>
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alloc_context(Signal_source_capability source, unsigned long imprint) = 0;
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/**
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* Free signal-context
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*
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* \param cap capability of signal-context to release
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*/
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virtual void free_context(Capability<Signal_context> cap) = 0;
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/**
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* Submit signals to the specified signal context
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*
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* \param context signal destination
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* \param cnt number of signals to submit at once
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*
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* The 'context' argument does not necessarily belong to this PD session.
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* Normally, it is a capability obtained from a potentially untrusted
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* component. Because we cannot trust this capability, signals are not
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* submitted by invoking 'cap' directly but by using it as argument to our
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* trusted PD-session interface. Otherwise, a potential signal receiver
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* could supply a capability with a blocking interface to compromise the
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* nonblocking behaviour of the signal submission.
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*/
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virtual void submit(Capability<Signal_context> context, unsigned cnt = 1) = 0;
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/***********************************
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** Support for the RPC framework **
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***********************************/
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/**
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* Allocate new RPC-object capability
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*
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* \param ep entry point that will use this capability
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*
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* \throw Out_of_metadata if meta-data backing store is exhausted
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*
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* \return new RPC capability
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*/
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virtual Native_capability alloc_rpc_cap(Native_capability ep) = 0;
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/**
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* Free RPC-object capability
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*
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* \param cap capability to free
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*/
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virtual void free_rpc_cap(Native_capability cap) = 0;
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/**************************************
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** Virtual address-space management **
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**************************************/
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enum { LINKER_AREA_SIZE = 160*1024*1024UL };
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/**
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* Return region map of the PD's virtual address space
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*/
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virtual Capability<Region_map> address_space() = 0;
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/**
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* Return region map of the PD's stack area
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*/
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virtual Capability<Region_map> stack_area() = 0;
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/**
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* Return region map of the PD's linker area
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*/
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virtual Capability<Region_map> linker_area() = 0;
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/*****************************************
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** Access to kernel-specific interface **
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*****************************************/
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/**
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* Common base class of kernel-specific PD interfaces
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*/
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struct Native_pd { };
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/**
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* Return capability to kernel-specific PD operations
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*/
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virtual Capability<Native_pd> native_pd() = 0;
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/*********************
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** RPC declaration **
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*********************/
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GENODE_RPC(Rpc_assign_parent, void, assign_parent, Capability<Parent>);
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GENODE_RPC(Rpc_assign_pci, bool, assign_pci, addr_t, uint16_t);
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GENODE_RPC_THROW(Rpc_alloc_signal_source, Signal_source_capability,
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alloc_signal_source, GENODE_TYPE_LIST(Out_of_metadata));
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GENODE_RPC(Rpc_free_signal_source, void, free_signal_source, Signal_source_capability);
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GENODE_RPC_THROW(Rpc_alloc_context, Capability<Signal_context>, alloc_context,
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GENODE_TYPE_LIST(Out_of_metadata, Invalid_signal_source),
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Signal_source_capability, unsigned long);
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GENODE_RPC(Rpc_free_context, void, free_context,
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Capability<Signal_context>);
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GENODE_RPC(Rpc_submit, void, submit, Capability<Signal_context>, unsigned);
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GENODE_RPC_THROW(Rpc_alloc_rpc_cap, Native_capability, alloc_rpc_cap,
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GENODE_TYPE_LIST(Out_of_metadata), Native_capability);
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GENODE_RPC(Rpc_free_rpc_cap, void, free_rpc_cap, Native_capability);
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GENODE_RPC(Rpc_address_space, Capability<Region_map>, address_space);
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GENODE_RPC(Rpc_stack_area, Capability<Region_map>, stack_area);
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GENODE_RPC(Rpc_linker_area, Capability<Region_map>, linker_area);
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GENODE_RPC(Rpc_native_pd, Capability<Native_pd>, native_pd);
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/*
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* Manual definition of 'Rpc_functions', see the comment in cpu_session.h.
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*/
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typedef Meta::Type_tuple<Rpc_assign_parent,
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Meta::Type_tuple<Rpc_assign_pci,
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Meta::Type_tuple<Rpc_alloc_signal_source,
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Meta::Type_tuple<Rpc_free_signal_source,
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Meta::Type_tuple<Rpc_alloc_context,
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Meta::Type_tuple<Rpc_free_context,
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Meta::Type_tuple<Rpc_submit,
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Meta::Type_tuple<Rpc_alloc_rpc_cap,
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Meta::Type_tuple<Rpc_free_rpc_cap,
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Meta::Type_tuple<Rpc_address_space,
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Meta::Type_tuple<Rpc_stack_area,
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Meta::Type_tuple<Rpc_linker_area,
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Meta::Type_tuple<Rpc_native_pd,
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Meta::Empty>
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> > > > > > > > > > > > Rpc_functions;
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};
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#endif /* _INCLUDE__PD_SESSION__PD_SESSION_H_ */
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