svn commit: r256007 - head/sys/powerpc/include

[Nathan Whitehorn]

Author: nwhitehorn
Date: Wed Oct  2 20:40:21 2013
New Revision: 256007
URL: http://svnweb.freebsd.org/changeset/base/256007

Log:
  Implement GET_STACK_USAGE() on PowerPC. This implementation is identical
  to that on x86 and sparc64.
  
  Approved by:	re (kib)

Modified:
  head/sys/powerpc/include/proc.h

Modified: head/sys/powerpc/include/proc.h
==============================================================================
--- head/sys/powerpc/include/proc.h	Wed Oct  2 19:23:02 2013	(r256006)
+++ head/sys/powerpc/include/proc.h	Wed Oct  2 20:40:21 2013	(r256007)
@@ -54,6 +54,18 @@ struct mdproc {
 #endif
 
 #ifdef _KERNEL
+
+#include <machine/pcb.h>
+
+/* Get the current kernel thread stack usage. */
+#define	GET_STACK_USAGE(total, used) do {				\
+	struct thread *td = curthread;					\
+	(total) = td->td_kstack_pages * PAGE_SIZE - sizeof(struct pcb);	\
+	(used) = (char *)td->td_kstack +				\
+	    td->td_kstack_pages * PAGE_SIZE -				\
+	    (char *)&td;						\
+} while (0)
+
 struct syscall_args {
 	u_int code;
 	struct sysent *callp;