Support task_wait / task_wait_tid syscalls:

    - Add task_end2 syscall to allow pthread_exit-like retval.
    - Add/maintain task states.
    - Create task parent/child tracking tree.
    - Add task_detach function.
    - Implement wait syscalls.

Make task_exec caller the parent of spawned task:

    Previously the task_exec call caused a message to the
    VFS task, which called task_create and returned the tid
    in response to the message.  This causes the parent of
    the spawned task to appear to be the VFS task.

    Modify task_exec / VFS handling to instead return the
    entry point address on the message and have task_exec call
    task_create directly itself.

Change-Id: I6b6796f45875de37b1ab01e7596639b073820b95
Reviewed-on: http://gfw160.austin.ibm.com:8080/gerrit/443
Tested-by: Jenkins Server
Reviewed-by: Daniel M. Crowell <dcrowell@us.ibm.com>
Reviewed-by: Andrew J. Geissler <andrewg@us.ibm.com>

1 files changed, 1 insertions, 0 deletions

diff --git a/src/include/errno.h b/src/include/errno.h
index d4c296179..79eb30bbf 100644
--- a/src/include/errno.h
+++ b/src/include/errno.h
@@ -31,6 +31,7 @@
 #define	EFAULT          14      // Bad address
 #define EINVAL          22      // Invalid argument
 #define ENFILE          23      // Too many open files in system
+#define EDEADLK         35      // Operation would cause deadlock.
 
 #define EWOULDBLOCK     EAGAIN  // operation would block