Previously all pending events were handled on return of exceptions
in process context. This was causing threads that run in userspace
and take no exceptions not handle their pending events indefinitely.
Now scheduler handles them in irq context as well.
Multi-threaded apps can now wait on children to destroy.
WAIT_ON is useful when a child exists with an exit code and the pager
of the child does not want to take the hassle of destorying it via an
ipc. It provides an alternative method of synchronous thread destruction,
where the child destroys itself directly rather than the parent issuing
a destroy on it explicitly.
Reiterating again to simplify:
Working:
- Pager issues destroy, client also issues exit
they work in sync.
Missing
- Pager killing itself
- Pager killing all children while killing itself
- Pager waiting on children
It is important to be able to create environments with not much
involvement with capability management. This is to increase usability
of the system and provide the option of having simpler api with
less security-oriented applications.
Pagers can now share their own private capabilities with their
paged children, or their siblings with whom they have a common pager
ancestor.
Added flags CAP_SHARE_CHILD and CAP_SHARE_SIBLINGS for that.
Pagers by default do not share their capabilities with their children.
By using one of CAP_SHARE_SPACE, CAP_SHARE_GROUP or CAP_SHARE_CONTAINER
a pager may now share its capabilities with a collection of threads.
Test container is planned to test codezero microkernel extensively.
With these changes, everything is there to develop a full-featured test suite.
It also exemplifies how a new container type can be added to the system.
(cherry picked from commit f21fa53df421bfc8eeeaa096c89b98beed436c60)
Removed dependency on hard-coded pager id. Pager id is now passed
as an environment string `pagerid' to tasks. Alternatively, this
could take space in the utcb of each task.
Added a per-container container.h that inclues useful definitions.
Hello world now is in a separate file not to modify main too often.
hello world now prints container name and id.
new file: conts/test/SConstruct
new file: conts/test/container.c
new file: conts/test/include/linker.lds
new file: conts/test/include/test.h
new file: conts/test/main.c
new file: conts/test/src/test.c
modified: scripts/bare/bare_generator.py
