Index: boot/genarch/ofw_tree.c
===================================================================
--- boot/genarch/ofw_tree.c	(revision 1b43a0495c2749ca4430886badcc6e9320843580)
+++ boot/genarch/ofw_tree.c	(revision b63a7cc2e041ecffd46183cd61923f532c13d113)
@@ -70,5 +70,6 @@
  * Transfer entire information from the OpenFirmware device tree 'current' node to
  * its memory representation in 'current_node'. This function recursively processes
- * all node's peers and children.
+ * all node's children. Node's peers are processed iteratively in order to prevent
+ * stack from overflowing.
  *
  * @param current_node	Pointer to uninitialized ofw_tree_node structure that will
@@ -84,112 +85,130 @@
 	phandle peer;
 	phandle child;
-	unsigned properties = 0;
 	size_t len;
 	int i;
 
-	/*
-	 * Initialize node.
-	 */
-	current_node->parent = parent_node;
-	current_node->peer = NULL;
-	current_node->child = NULL;
-	current_node->node_handle = current;
-	current_node->properties = 0;
-	current_node->property = NULL;
-	current_node->device = NULL;
-	
-	/*
-	 * Get the disambigued name.
-	 */
-	len = ofw_package_to_path(current, path, MAX_PATH_LEN);
-	if (len == -1)
-		return;
-	
-	path[len] = '\0';
-	for (i = len - 1; i >= 0 && path[i] != '/'; i--)
-		;
-	i++;								/* do not include '/' */
-	
-	len -= i;
-	current_node->da_name = ofw_tree_space_alloc(len + 1);		/* add space for trailing '\0' */
-	if (!current_node->da_name)
-		return;
-	
-	memcpy(current_node->da_name, &path[i], len);
-	current_node->da_name[len] = '\0';
-	
-	/*
-	 * Recursively process the potential peer node.
-	 */
-	peer = ofw_get_peer_node(current);
-	if (peer != 0 && peer != -1) {
-		ofw_tree_node_t *peer_node;
-		
-		peer_node = ofw_tree_node_alloc();
-		if (peer_node) {
-			ofw_tree_node_process(peer_node, parent_node, peer);
-			current_node->peer = peer_node;
+	while (current_node) {
+		/*
+		 * Initialize node.
+		 */
+		current_node->parent = parent_node;
+		current_node->peer = NULL;
+		current_node->child = NULL;
+		current_node->node_handle = current;
+		current_node->properties = 0;
+		current_node->property = NULL;
+		current_node->device = NULL;
+	
+		/*
+		 * Get the disambigued name.
+		 */
+		len = ofw_package_to_path(current, path, MAX_PATH_LEN);
+		if (len == -1)
+			return;
+	
+		path[len] = '\0';
+		for (i = len - 1; i >= 0 && path[i] != '/'; i--)
+			;
+		i++;	/* do not include '/' */
+	
+		len -= i;
+
+		/* add space for trailing '\0' */
+		current_node->da_name = ofw_tree_space_alloc(len + 1);
+		if (!current_node->da_name)
+			return;
+	
+		memcpy(current_node->da_name, &path[i], len);
+		current_node->da_name[len] = '\0';
+	
+	
+		/*
+		 * Recursively process the potential child node.
+		 */
+		child = ofw_get_child_node(current);
+		if (child != 0 && child != -1) {
+			ofw_tree_node_t *child_node;
+		
+			child_node = ofw_tree_node_alloc();
+			if (child_node) {
+				ofw_tree_node_process(child_node, current_node, child);
+				current_node->child = child_node;
+			}
 		}
+	
+		/*
+		 * Count properties.
+		 */
+		name[0] = '\0';
+		while (ofw_next_property(current, name, name) == 1)
+			current_node->properties++;
+	
+		if (!current_node->properties)
+			return;
+	
+		/*
+		 * Copy properties.
+		 */
+		current_node->property = ofw_tree_properties_alloc(current_node->properties);
+		if (!current_node->property)
+			return;
+		
+		name[0] = '\0';
+		for (i = 0; ofw_next_property(current, name, name) == 1; i++) {
+			size_t size;
+		
+			if (i == current_node->properties)
+				break;
+		
+			memcpy(current_node->property[i].name, name,
+				OFW_TREE_PROPERTY_MAX_NAMELEN);
+			current_node->property[i].name[OFW_TREE_PROPERTY_MAX_NAMELEN] = '\0';
+
+			size = ofw_get_proplen(current, name);
+			current_node->property[i].size = size;
+			if (size) {
+				void *buf;
+			
+				buf = ofw_tree_space_alloc(size);
+				if (current_node->property[i].value = buf) {
+					/*
+					 * Copy property value to memory node.
+					 */
+					(void) ofw_get_property(current, name, buf, size);
+				}
+			} else {
+				current_node->property[i].value = NULL;
+			}
+		}
+
+		current_node->properties = i;	/* Just in case we ran out of memory. */
+
+		/*
+		 * Iteratively process the next peer node.
+		 * Note that recursion is a bad idea here.
+		 * Due to the topology of the OpenFirmware device tree,
+		 * the nesting of peer nodes could be to wide and the
+		 * risk of overflowing the stack is too real.
+		 */
+		peer = ofw_get_peer_node(current);
+		if (peer != 0 && peer != -1) {
+			ofw_tree_node_t *peer_node;
+		
+			peer_node = ofw_tree_node_alloc();
+			if (peer_node) { 
+				current_node->peer = peer_node;
+				current_node = peer_node;
+				current = peer;
+				/*
+				 * Process the peer in next iteration.
+				 */
+				continue;
+			}
+		}
+		/*
+		 * No more peers on this level.
+		 */
+		break;
 	}
-	
-	/*
-	 * Recursively process the potential child node.
-	 */
-	child = ofw_get_child_node(current);
-	if (child != 0 && child != -1) {
-		ofw_tree_node_t *child_node;
-		
-		child_node = ofw_tree_node_alloc();
-		if (child_node) {
-			ofw_tree_node_process(child_node, current_node, child);
-			current_node->child = child_node;
-		}
-	}
-	
-	/*
-	 * Count properties.
-	 */
-	name[0] = '\0';
-	while (ofw_next_property(current, name, name) == 1)
-		current_node->properties++;
-	
-	if (!current_node->properties)
-		return;
-	
-	/*
-	 * Copy properties.
-	 */
-	current_node->property = ofw_tree_properties_alloc(current_node->properties);
-	if (!current_node->property)
-		return;
-		
-	name[0] = '\0';
-	for (i = 0; ofw_next_property(current, name, name) == 1; i++) {
-		size_t size;
-		
-		if (i == current_node->properties)
-			break;
-		
-		memcpy(current_node->property[i].name, name, OFW_TREE_PROPERTY_MAX_NAMELEN);
-		current_node->property[i].name[OFW_TREE_PROPERTY_MAX_NAMELEN] = '\0';
-
-		size = ofw_get_proplen(current, name);
-		current_node->property[i].size = size;
-		if (size) {
-			void *buf;
-			
-			buf = ofw_tree_space_alloc(size);
-			if (current_node->property[i].value = buf) {
-				/*
-				 * Copy property value to memory node.
-				 */
-				(void) ofw_get_property(current, name, buf, size);
-			}
-		} else {
-			current_node->property[i].value = NULL;
-		}
-	}
-		
-	current_node->properties = i;	/* Just in case we ran out of memory. */
 }