genode/repos/ports/include/vmm/printf.h
2017-02-28 12:59:29 +01:00

51 lines
1019 B
C++

/*
* \brief Utilities for implementing VMMs on Genode/NOVA
* \author Norman Feske
* \date 2013-08-20
*/
/*
* Copyright (C) 2013-2017 Genode Labs GmbH
*
* This file is part of the Genode OS framework, which is distributed
* under the terms of the GNU Affero General Public License version 3.
*/
#ifndef _INCLUDE__VMM__PRINTF_H_
#define _INCLUDE__VMM__PRINTF_H_
/* Genode includes */
#include <base/thread.h>
#include <base/lock.h>
#include <base/log.h>
/* NOVA includes */
#include <nova/syscalls.h>
namespace Vmm {
using namespace Genode;
/**
* Print message while preserving the UTCB content
*/
template <typename... ARGS>
void log(ARGS... args)
{
struct Utcb_backup { char buf[Nova::Utcb::size()]; };
static Lock lock;
static Utcb_backup utcb_backup;
Lock::Guard guard(lock);
utcb_backup = *(Utcb_backup *)Thread::myself()->utcb();
Genode::log("VMM: ", args...);
*(Utcb_backup *)Thread::myself()->utcb() = utcb_backup;
}
}
#endif /* _INCLUDE__VMM__PRINTF_H_ */