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Cleanup of parent-cap handling

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This patch alleviates the need for a Native_capability::Dst at the API
level. The former use case of this type as argument to
Deprecated_env::reinit uses the opaque Native_capability::Raw type
instead. The 'Raw' type contains the portion of the capability that is
transferred as-is when delegating the capability (i.e., when installing
the parent capability into a new component, or when installing a new
parent capability into a new forked Noux process). This information can
be retrieved via the new Native_capability::raw method.

Furthermore, this patch moves the functions for retriving the parent
capability to base/internal/parent_cap.h, which is meant to be
implemented in platform-specific ways. It replaces the former set of
startup/internal/_main_parent_cap.h headers.

Issue #1993
This commit is contained in:
Norman Feske
2016-06-13 15:14:32 +02:00
parent f7bdd383e2
commit d71f0a9606
29 changed files with 185 additions and 190 deletions
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50
repos/base-foc/src/include/base/internal/parent_cap.h Normal file
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/*
* \brief Interface to obtain the parent capability for the component
* \author Norman Feske
* \date 2013-09-25
*
* On Fiasco.OC, we transfer merely the 'local_name' part of the capability
* via the '_parent_cap' field of the ELF binary.
*/
/*
* Copyright (C) 2006-2013 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU General Public License version 2.
*/
#ifndef _INCLUDE__BASE__INTERNAL__PARENT_CAP_H_
#define _INCLUDE__BASE__INTERNAL__PARENT_CAP_H_
/* Genode includes */
#include <parent/capability.h>
#include <util/string.h>
#include <foc/native_capability.h>
/* base-internal includes */
#include <base/internal/crt0.h>
namespace Genode {
static inline Parent_capability parent_cap()
{
unsigned long const local_name = _parent_cap;
static Cap_index *i = cap_map()->insert(local_name,
Fiasco::PARENT_CAP);
/*
* Update local name after a parent capability got reloaded via
* 'Platform_env::reload_parent_cap()'.
*/
if (i->id() != local_name) {
cap_map()->remove(i);
i = cap_map()->insert(local_name, Fiasco::PARENT_CAP);
}
return reinterpret_cap_cast<Parent>(Native_capability(i));
}
}
#endif /* _INCLUDE__BASE__INTERNAL__PARENT_CAP_H_ */