59 lines
1.1 KiB
C++
59 lines
1.1 KiB
C++
/*
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* \brief Utilities for implementing VMMs on Genode/NOVA
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* \author Norman Feske
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* \date 2013-08-20
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*/
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/*
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* Copyright (C) 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__VMM__PRINTF_H_
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#define _INCLUDE__VMM__PRINTF_H_
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/* Genode includes */
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#include <base/thread.h>
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#include <base/lock.h>
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#include <base/printf.h>
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/* NOVA includes */
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#include <nova/syscalls.h>
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namespace Vmm {
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using namespace Genode;
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void printf(const char *format, ...) __attribute__((format(printf, 1, 2)));
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}
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/**
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* Print message while preserving the UTCB content
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*/
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inline void Vmm::printf(const char *format, ...)
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{
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va_list list;
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va_start(list, format);
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struct Utcb_backup { char buf[Nova::Utcb::size()]; };
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static Lock lock;
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static Utcb_backup utcb_backup;
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Lock::Guard guard(lock);
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utcb_backup = *(Utcb_backup *)Thread_base::myself()->utcb();
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Genode::printf("VMM: ");
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Genode::vprintf(format, list);
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*(Utcb_backup *)Thread_base::myself()->utcb() = utcb_backup;
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va_end(list);
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}
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#endif /* _INCLUDE__VMM__PRINTF_H_ */
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