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aa9ff3894c
With planned removal of Thread:: exceptions, we need to consider that a 'Thread' object may exist without a valid 'Stack' and therefore without a valid 'Native_thread', which is hosted as part of the 'Stack'. This patch reworks the code that accesses the 'Native_thread' to use the new 'Thread::with_native_thread' interface. Within the local scope, the native thread is referred to as 'nt'. The _init_platform_thread and _deinit_platform_thread() have been replaced by _init_native_thread and _deinit_native_thread, which take a 'Stack &' as argument. As a safety caution, 'Native_thread' objects can no longer be copied. Issue #5245
64 lines
2.0 KiB
C++
64 lines
2.0 KiB
C++
/*
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* \brief Kernel-specific thread meta data
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* \author Norman Feske
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* \date 2016-03-11
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*
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* On most platforms, the 'Genode::Native_thread' type is private to the
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* base framework. However, on NOVA, we make the type publicly available to
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* expose the low-level thread-specific capability selectors to user-level
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* virtual-machine monitors (Seoul or VirtualBox).
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*/
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/*
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* Copyright (C) 2016-2017 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 _INCLUDE__NOVA__NATIVE_THREAD_H_
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#define _INCLUDE__NOVA__NATIVE_THREAD_H_
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#include <nova/receive_window.h>
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namespace Genode { struct Native_thread; }
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struct Genode::Native_thread : Noncopyable
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{
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static constexpr unsigned long INVALID_INDEX = ~0UL;
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addr_t ec_sel = INVALID_INDEX; /* selector for execution context */
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addr_t exc_pt_sel = INVALID_INDEX; /* base of event portal window */
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/*
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* Designated selector to populate with the result of an IPC call
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*
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* By default, the client-side receive window for delegated selectors
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* is automatically allocated within the component's selector space.
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* However, in special cases such as during the initialization of a
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* user-level VMM (ports/include/vmm/vcpu_dispatcher.h), the targeted
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* selector is defined manually. The 'client_rcv_sel' provides the
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* hook for such a manual allocation. If it contains a valid selector
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* value, the value is used as the basis of the receive window of an
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* 'ipc_call'.
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*/
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addr_t client_rcv_sel = INVALID_INDEX;
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addr_t initial_ip = 0;
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/* receive window for capability selectors received at the server side */
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Receive_window server_rcv_window { };
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Native_capability pager_cap { };
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Native_thread() { }
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/* ec_sel is invalid until thread gets started */
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bool ec_valid() const { return ec_sel != INVALID_INDEX; }
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void reset_client_rcv_sel() { client_rcv_sel = INVALID_INDEX; }
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};
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#endif /* _INCLUDE__NOVA__NATIVE_THREAD_H_ */
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