Removed sys_exit() kernel call.

lib/syslib/Makefile

@@ -27,7 +27,6 @@ OBJECTS	= \
 	$(LIBSYS)(sys_eniop.o) \
 	$(LIBSYS)(sys_segctl.o) \
 	$(LIBSYS)(sys_umap.o) \
-	$(LIBSYS)(sys_exit.o) \
 	$(LIBSYS)(sys_physcp.o) \
 	$(LIBSYS)(sys_vircp.o) \
 	$(LIBSYS)(sys_in.o) \
@@ -95,9 +94,6 @@ $(LIBSYS)(sys_segctl.o):	sys_segctl.c
 $(LIBSYS)(sys_umap.o):	sys_umap.c
 	$(CC1) sys_umap.c
 
-$(LIBSYS)(sys_exit.o):	sys_exit.c
-	$(CC1) sys_exit.c
-
 $(LIBSYS)(sys_getsig.o):	sys_getsig.c
 	$(CC1) sys_getsig.c
 

lib/syslib/sys_exit.c

@@ -1,15 +0,0 @@
-#include "syslib.h"
-
-/*===========================================================================*
- *                              sys_exit			     	     *
- *===========================================================================*/
-PUBLIC int sys_exit(int status)
-{
-/* A server wants to exit. The exit status is passed on, possibly a panic.
- */
-  message m;
-  m.EXIT_STATUS = status;
-  return(_taskcall(SYSTASK, SYS_EXIT, &m));
-  /* NOT REACHED */
-}
-

lib/syslib/sys_xit.c

@@ -3,15 +3,15 @@
 /*===========================================================================*
  *                                sys_xit			     	     *
  *===========================================================================*/
-PUBLIC int sys_xit(parent, proc)
-int parent;			/* parent of exiting process */
+PUBLIC int sys_xit(proc)
 int proc;			/* which process has exited */
 {
-/* A process has exited.  Tell the kernel. */
-
+/* A process has exited. PM tells the kernel. In addition this call can be
+ * used by system processes to directly exit without passing through the
+ * PM. This should be used with care to prevent inconsistent PM tables. 
+ */
   message m;
 
-  m.PR_PPROC_NR = parent;
   m.PR_PROC_NR = proc;
   return(_taskcall(SYSTASK, SYS_XIT, &m));
 }

lib/utils/panic.c

@@ -22,9 +22,9 @@ int num;			/* number to go with format string */
       }
   }
 
-  m.m_type = SYS_EXIT;
-  m.EXIT_STATUS = 1;
-  _taskcall(SYSTASK, SYS_EXIT, &m);
+  m.m_type = SYS_XIT;
+  m.PR_PROC_NR = SELF;
+  _taskcall(SYSTASK, SYS_XIT, &m);
   /* never reached */
 }