This is my initial working version.

There is a bug in boot in this version: subhurd sometimes cannot boot.

1 files changed, 97 insertions, 0 deletions

diff --git a/boot-proxy-exc/mach_proxy.c~ b/boot-proxy-exc/mach_proxy.c~
new file mode 100644
index 00000000..1bb46821
--- /dev/null
+++ b/boot-proxy-exc/mach_proxy.c~
@@ -0,0 +1,97 @@
+/* 
+   Copyright (C) 2009 Free Software Foundation, Inc.
+   Written by Zheng Da.
+
+   This file is part of the GNU Hurd.
+
+   The GNU Hurd is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 2, or (at your option)
+   any later version.
+
+   The GNU Hurd is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with the GNU Hurd; see the file COPYING.  If not, write to
+   the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
+
+#include <string.h>
+
+#include "util.h"
+#include "mach_proxy.h"
+
+static LIST_HEADER (tasks_head);
+
+static struct mutex tasks_lock = MUTEX_INITIALIZER;
+
+int create_pseudo_task (task_t real_task, task_t *ret_pseudo_task)
+{
+  /* the first task is the kernel task. */
+  struct task_info *task_pi;
+  task_t pseudo_task;
+  error_t err;
+
+  err = ports_create_port (task_portclass, port_bucket,
+			   sizeof (struct task_info), &task_pi);
+  if (err)
+    return err;
+
+  task_pi->task_port = real_task;
+  task_pi->exc_pi = NULL;
+  task_pi->user_exc_port = 0;
+  mutex_info (&task_pi->lock);
+  entry_init (&task_pi->list);
+  mutex_lock (&tasks_lock);
+  add_entry_end (&tasks_head, &task_pi->list);
+  mutex_unlock (&tasks_lock);
+
+  pseudo_task = ports_get_right (task_pi);
+  mach_port_insert_right (mach_task_self (), pseudo_task, pseudo_task,
+			  MACH_MSG_TYPE_MAKE_SEND);
+  ports_port_deref (task_pi);
+
+  if (ret_pseudo_task)
+    *ret_pseudo_task = pseudo_task;
+
+  err = task_set_kernel_port (real_task, pseudo_task);
+  if (err) 
+    {
+      debug ("fail to set the kernel port: %s", strerror (err));
+      ports_destroy_right (task_pi);
+    }
+
+  return err;
+}
+
+void clean_pseudo_task (void *pi)
+{
+  struct task_info *task = pi;
+
+  debug ("remove a pseudo task from the list");
+  mutex_lock (&tasks_lock);
+  remove_entry (&task->list);
+  mutex_unlock (&tasks_lock);
+  
+  if (task->exc_pi)
+    ports_destroy_right (task->exc_pi);
+  if (task->user_exc_port)
+    mach_port_deallocate (mach_task_self (), task->user_exc_port);
+}
+
+void foreach_task (task_callback_t callback)
+{
+  struct list *entry = &tasks_head;
+  mutex_lock (&tasks_lock);
+  for (entry = tasks_head.next; entry != &tasks_head; entry = entry->next) 
+    {
+//      mutex_unlock (&tasks_lock);
+      struct task_info *task_pi = LIST_ENTRY (entry, struct task_info, list);
+      if (callback (task_pi))
+	break;
+//      mutex_lock (&tasks_lock);
+    }
+  mutex_unlock (&tasks_lock);
+}