330980378c
Areas of an attached dataspace which have never been accessed cannot get unmapped. With this patch this case is not treated as error anymore. Fixes #398.
64 lines
1.5 KiB
C++
64 lines
1.5 KiB
C++
/*
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* \brief RM-session implementation
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* \author Norman Feske
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* \author Sebastian Sumpf
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* \date 2009-10-02
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*/
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/*
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* Copyright (C) 2009-2012 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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/* Genode includes */
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#include <base/printf.h>
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#include <base/ipc_pager.h>
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/* core includes */
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#include <rm_session_component.h>
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#include <nova_util.h>
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using namespace Genode;
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static const bool verbose = false;
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void Rm_client::unmap(addr_t core_local_base, addr_t virt_base, size_t size)
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{
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addr_t const core_local_end = core_local_base + (size - 1);
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off_t const core_to_virt = virt_base - core_local_base;
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Nova::Rights rwx(true, true, true);
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while (true) {
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Nova::Mem_crd crd(core_local_base >> 12, 32, rwx);
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Nova::lookup(crd);
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if (!crd.is_null()) {
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if (verbose)
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PINF("Unmapping local: %08lx virt: %08lx base: %lx order: %lx size: %lx is null: %d",
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core_local_base, core_local_base + core_to_virt, crd.base(), crd.order(),
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(0x1000UL << crd.order()), crd.is_null());
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unmap_local(crd, false);
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core_local_base = (crd.base() << 12) /* base address of mapping */
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+ (0x1000 << crd.order()); /* size of mapping */
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} else {
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/* This can happen if the region has never been touched */
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if (verbose)
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PINF("Nothing mapped at local: %08lx virt: %08lx",
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core_local_base, core_local_base + core_to_virt);
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core_local_base += 0x1000;
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}
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if (core_local_base > core_local_end)
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return;
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}
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}
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