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, 3 insertions, 5 deletions

diff --git a/src/usr/vfs/vfsrp.C b/src/usr/vfs/vfsrp.C
index 266cdecba..9c178e92a 100644
--- a/src/usr/vfs/vfsrp.C
+++ b/src/usr/vfs/vfsrp.C
@@ -314,8 +314,8 @@ void VfsRp::_load_unload(msg_t * i_msg)
     {
         // Module does not exist in extended image.
         // If it exists then it is in the base image and it's already
-        // initialized, however, we still should not be here, so put out a 
-        // trace msg; 
+        // initialized, however, we still should not be here, so put out a
+        // trace msg;
         // If it does not exist anywhere then also create an error log
         TRACFCOMP(g_trac_vfs, ERR_MRK"load Module not found: %s",
                  (const char *) i_msg->data[0]);
@@ -362,11 +362,9 @@ void VfsRp::_exec(msg_t * i_msg)
                                             VFS_EXTENDED_MODULE_TABLE_OFFSET),
                         (const char*) msg1->data[0]);
 
-    tid_t child = vfs_exec(module, (void*) msg1->data[1]);
-
     msg_q_t vfsRmsgQ = (msg_q_t) i_msg->data[1];
 
-    msg1->data[0] = child;
+    msg1->data[0] = (uint64_t) vfs_start_entrypoint(module);
 
     msg_respond(vfsRmsgQ,msg1);
     msg_free(i_msg);