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hw: error message on unmap on broken RM clients

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In the past, unmap sometimes occured on RM clients that have no thread,
PD, or translation table assigned. However, this shouldn't be the
case anymore.

Fixes #504
This commit is contained in:
Martin Stein 2015-03-10 12:38:41 +01:00 committed by Christian Helmuth
parent 657646e76e
commit d312f840bd
1 changed files with 19 additions and 11 deletions
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30
repos/base-hw/src/core/rm_session_support.cc
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@ -31,21 +31,29 @@ using namespace Genode;
void Rm_client::unmap(addr_t, addr_t virt_base, size_t size)
{
/* remove mapping from the translation table of the thread that we serve */
/* determine and lock PD */
Platform_thread * const pt = (Platform_thread *)badge();
if (!pt || !pt->pd()) return;
Lock::Guard guard(*pt->pd()->lock());
Translation_table * const tt = pt->pd()->translation_table();
if (!tt) {
PWRN("failed to get translation table of RM client");
if (!pt) {
PERR("failed to get thread of RM client");
return;
}
tt->remove_translation(virt_base, size,pt->pd()->page_slab());
Platform_pd * const pd = pt->pd();
if (!pd) {
PERR("failed to get PD of RM client");
return;
}
Lock::Guard guard(*pd->lock());
/* update translation caches of all CPUs */
Kernel::update_pd(pt->pd()->id());
/* update translation table of the PD */
Translation_table * const tt = pd->translation_table();
if (!tt) {
PERR("failed to get translation table of RM client");
return;
}
tt->remove_translation(virt_base, size, pd->page_slab());
/* update translation caches */
Kernel::update_pd(pd->id());
}