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	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY			* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF			* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	* SUCH DAMAGE.			* SUCH DAMAGE.
	*/			*/

	#include <sys/cdefs.h>			#include <sys/cdefs.h>
	__FBSDID("$FreeBSD$");			__FBSDID("$FreeBSD$");
	#include <sys/param.h>			#include <sys/param.h>
				#include <sys/proc.h>

	#include <machine/stack.h>			#include <machine/stack.h>
	#include <machine/vmparam.h>			#include <machine/vmparam.h>

	int			bool
	unwind_frame(struct unwind_state *frame)			unwind_frame(struct thread td, struct unwind_state frame)
	{			{
	uintptr_t fp;			uintptr_t fp;

	fp = frame->fp;			fp = frame->fp;

	if (!INKERNEL(fp))			if (!kstack_contains(td, fp - sizeof(fp) * 2, sizeof(fp) * 2))
	return (-1);			return (false);

	frame->sp = fp;			frame->sp = fp;
	frame->fp = ((uintptr_t *)fp)[-2];			frame->fp = ((uintptr_t *)fp)[-2];
	frame->pc = ((uintptr_t *)fp)[-1] - 4;			frame->pc = ((uintptr_t *)fp)[-1] - 4;

	return (0);			return (true);
	}			}