206 lines
5.4 KiB
C++
206 lines
5.4 KiB
C++
/*
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* \brief Application child
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* \author Christian Prochaska
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* \date 2009-10-05
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*/
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/*
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* Copyright (C) 2009-2017 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 _APP_CHILD_H_
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#define _APP_CHILD_H_
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/* Genode includes */
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#include <base/child.h>
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#include <base/service.h>
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#include <init/child_policy.h>
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#include <util/arg_string.h>
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/* GDB monitor includes */
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#include "genode_child_resources.h"
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#include "cpu_session_component.h"
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#include "pd_session_component.h"
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#include "rom.h"
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#include "child_config.h"
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namespace Gdb_monitor {
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using namespace Genode;
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class App_child;
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}
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class Gdb_monitor::App_child : public Child_policy
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{
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public:
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typedef Registered<Genode::Parent_service> Parent_service;
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typedef Registry<Parent_service> Parent_services;
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private:
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enum { STACK_SIZE = 4*1024*sizeof(long) };
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Env &_env;
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Allocator &_alloc;
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Ram_session_capability _ref_ram_cap { _env.ram_session_cap() };
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Ram_session_client _ref_ram { _ref_ram_cap };
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const char *_unique_name;
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Dataspace_capability _elf_ds;
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Region_map &_rm;
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size_t _ram_quota;
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Rpc_entrypoint _entrypoint;
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Parent_services _parent_services;
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Init::Child_config _child_config;
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Init::Child_policy_provide_rom_file _config_policy;
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Genode_child_resources _genode_child_resources;
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Signal_dispatcher<App_child> _unresolved_page_fault_dispatcher;
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Dataspace_pool _managed_ds_map;
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Pd_session_component _pd { _entrypoint, _env, _alloc, _unique_name, _managed_ds_map };
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Pd_service::Single_session_factory _pd_factory { _pd };
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Pd_service _pd_service { _pd_factory };
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Local_cpu_factory _cpu_factory;
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Cpu_service _cpu_service { _cpu_factory };
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Local_rom_factory _rom_factory;
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Rom_service _rom_service { _rom_factory };
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Child *_child;
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void _dispatch_unresolved_page_fault(unsigned)
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{
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_genode_child_resources.cpu_session_component().handle_unresolved_page_fault();
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}
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template <typename T>
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static Service *_find_service(Registry<T> &services,
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Service::Name const &name)
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{
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Service *service = nullptr;
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services.for_each([&] (T &s) {
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if (!service && (s.name() == name))
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service = &s; });
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return service;
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}
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public:
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/**
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* Constructor
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*/
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App_child(Env &env,
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Allocator &alloc,
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char const *unique_name,
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size_t ram_quota,
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Signal_receiver &signal_receiver,
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Xml_node target_node)
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:
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_env(env),
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_alloc(alloc),
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_unique_name(unique_name),
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_rm(_env.rm()),
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_ram_quota(ram_quota),
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_entrypoint(&_env.pd(), STACK_SIZE, "GDB monitor entrypoint"),
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_child_config(env.ram(), _rm, target_node),
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_config_policy("config", _child_config.dataspace(), &_entrypoint),
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_unresolved_page_fault_dispatcher(signal_receiver,
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*this,
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&App_child::_dispatch_unresolved_page_fault),
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_cpu_factory(_env, _entrypoint, _alloc, _pd.core_pd_cap(),
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signal_receiver, &_genode_child_resources),
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_rom_factory(env, _entrypoint, _alloc)
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{
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_genode_child_resources.region_map_component(&_pd.region_map());
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_pd.region_map().fault_handler(_unresolved_page_fault_dispatcher);
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}
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~App_child()
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{
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destroy(_alloc, _child);
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}
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Genode_child_resources *genode_child_resources()
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{
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return &_genode_child_resources;
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}
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void start()
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{
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_child = new (_alloc) Child(_rm, _entrypoint, *this);
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}
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/****************************
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** Child-policy interface **
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****************************/
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Name name() const override { return _unique_name; }
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Ram_session &ref_ram() override { return _ref_ram; }
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Ram_session_capability ref_ram_cap() const override { return _ref_ram_cap; }
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void init(Ram_session &session,
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Ram_session_capability cap) override
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{
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session.ref_account(_ref_ram_cap);
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_ref_ram.transfer_quota(cap, _ram_quota);
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}
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Service &resolve_session_request(Service::Name const &service_name,
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Session_state::Args const &args) override
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{
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Service *service = nullptr;
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/* check for config file request */
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if ((service = _config_policy.resolve_session_request(service_name.string(), args.string())))
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return *service;
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if (service_name == "CPU")
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return _cpu_service;
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if (service_name == "PD")
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return _pd_service;
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if (service_name == "ROM")
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return _rom_service;
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service = _find_service(_parent_services, service_name);
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if (!service)
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service = new (_alloc) Parent_service(_parent_services, _env, service_name);
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if (!service)
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throw Parent::Service_denied();
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return *service;
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}
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// XXX adjust to API change, need to serve a "session_requests" rom
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// to the child
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void announce_service(Service::Name const &name) override
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{
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Genode::warning(__PRETTY_FUNCTION__, ": not implemented");
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}
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};
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#endif /* _APP_CHILD_H_ */
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