? db_machdep.c.diff
Index: db_machdep.c
===================================================================
RCS file: /cvsroot/src/sys/arch/amd64/amd64/db_machdep.c,v
retrieving revision 1.3
diff -u -p -u -r1.3 db_machdep.c
--- db_machdep.c	12 Jul 2012 17:14:39 -0000	1.3
+++ db_machdep.c	3 Oct 2012 16:56:58 -0000
@@ -131,7 +131,8 @@ db_nextframe(long **nextframe, long **re
 	    default:
 
 		/* The only argument to trap() or syscall() is the trapframe. */
-		tf = (struct trapframe *)argp;
+		tf = (struct trapframe *)
+			db_get_value((long)argp, sizeof(*tf), false);
 		switch (is_trap) {
 		case TRAP:
 			(*pr)("--- trap (number %d) ---\n", tf->tf_trapno);
@@ -143,8 +144,10 @@ db_nextframe(long **nextframe, long **re
 			(*pr)("--- interrupt ---\n");
 			break;
 		}
-		*ip = (db_addr_t)tf->tf_rip;
-		fp = (struct x86_64_frame *)tf->tf_rbp;
+		*ip = (db_addr_t)
+			db_get_value((long)tf->tf_rip, sizeof(*ip), false);
+		fp = (struct x86_64_frame *)
+			db_get_value((long)tf->tf_rbp, sizeof(*fp), false);
 		if (fp == NULL)
 			return 0;
 		*nextframe = (long *)&fp->f_frame;