Commit Graph

6 Commits

Author SHA1 Message Date
Norman Feske
73ab30c22c Update copyright headers to 2013 2013-01-10 21:44:47 +01:00
Norman Feske
f2e47ef9f4 Whitespace 2012-11-26 09:45:13 +01:00
Alexander Boettcher
6862ab481a NOVA: drop special utcb handling of main thread
Unify handling of UTCBs. The utcb of the main thread is with commit
ea38aad30e at a fixed location - per convention.
So we can remove all the ugly code to transfer the utcb address during process
creation.

To do so also the UTCB of the main thread of Core must be inside Genode's
thread context area to handle it the same way. Unfortunately the UTCB of the
main thread of Core can't be chosen, it is defined by the kernel.

Possible solutions:
- make virtual address of first thread UTCB configurable in hypervisor
- map the utcb of the first thread inside Core to the desired location

This commit implements the second option.

Kernel patch: make utcb map-able
With the patch the Utcb of the main thread of Core is map-able.

Fixes #374

Noux actually uses the sp variable during thread creation and expects to be
set accordingly. This wasn't the case for the main thread, it was ever set
to the address of the main thread UTCB.
2012-10-04 14:35:38 +02:00
Alexander Boettcher
4342d0d234 NOVA: let thread die if SM cap is invalid
Patch prevents following bugs:

* In sleep_forever the thread return from semaphore down if cap is revoked
  during destruction of a thread. This causes an endless loop consuming time
  not available for other threads.
* In lock_helper and cap_sel_alloc the thread return from the lock() method
  even if the semaphore down call failed because of an revoked semaphore.

  This lead to the situation that a thread subject to de-construction returns
  from the lock method, but not holding the lock, entering the critical section
  and modifying state inside the critical section. Another thread in parallel
  already in the critical section or entering the critical section also
  modifies the state. This lead to curious bugs ...
* thread_nova, thread_start, irq_session
  Detect early bugs if the SM is gone unexpectedly where it should never
  happen.
2012-08-09 11:09:42 +02:00
Alexander Boettcher
4155585267 NOVA: Adjust native_capability type
It now can hold a right bit used during IPC to demote rights of the to be
transfered capability.

The local_name field in the native_capability type is not needed anymore
in NOVA. Simplify the class, remove it from constructors and adapt all
invocations in base-nova.

Unfortunately local_name in struct Raw is still used in generic base code
(process.cc, reload_parent_cap.cc), however has no effect in base-nova.
2012-08-09 11:09:41 +02:00
Alexander Boettcher
7550f243ad NOVA: use cap_session to allocate portals 2012-08-09 11:09:41 +02:00