1 files changed, 54 insertions, 0 deletions
diff --git a/sys/powerpc/include/stack.h b/sys/powerpc/include/stack.h
new file mode 100644
index 000000000000..2904c36fe208
--- /dev/null
+++ b/sys/powerpc/include/stack.h
@@ -0,0 +1,54 @@
+/*-
+ * Mach Operating System
+ * Copyright (c) 1992 Carnegie Mellon University
+ * All Rights Reserved.
+ *
+ * Permission to use, copy, modify and distribute this software and its
+ * documentation is hereby granted, provided that both the copyright
+ * notice and this permission notice appear in all copies of the
+ * software, derivative works or modified versions, and any portions
+ * thereof, and that both notices appear in supporting documentation.
+ *
+ * CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
+ * CONDITION.  CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
+ * ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
+ *
+ * Carnegie Mellon requests users of this software to return to
+ *
+ *  Software Distribution Coordinator  or  Software.Distribution@CS.CMU.EDU
+ *  School of Computer Science
+ *  Carnegie Mellon University
+ *  Pittsburgh PA 15213-3890
+ *
+ * any improvements or extensions that they make and grant Carnegie Mellon
+ * the rights to redistribute these changes.
+ */
+
+#ifndef _MACHINE_STACK_H_
+#define	_MACHINE_STACK_H_
+
+extern int trapexit[];
+extern int asttrapexit[];
+extern int end[];
+
+#ifdef _SYS_PROC_H_
+
+#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) = td->td_kstack + (total) - (vm_offset_t)&td;		\
+} while (0)
+
+static __inline bool
+kstack_contains(struct thread *td, vm_offset_t va, size_t len)
+{
+	return (va >= td->td_kstack && va + len >= va &&
+	    va + len <= td->td_kstack + td->td_kstack_pages * PAGE_SIZE -
+	    sizeof(struct pcb));
+}
+#endif	/* _SYS_PROC_H_ */
+
+#endif /* !_MACHINE_STACK_H_ */