Index: kernel/generic/include/ipc/ipc.h
===================================================================
--- kernel/generic/include/ipc/ipc.h	(revision 0b378820b4861f67ea1335ef6260a5c98a59c64c)
+++ kernel/generic/include/ipc/ipc.h	(revision f6bffeebe3a4e9f347a03931d2c463a8718cd991)
@@ -115,4 +115,10 @@
  */
 #define IPC_FF_ROUTE_FROM_ME  (1 << 0)
+
+/* Data transfer flags. */
+#define IPC_XF_NONE		0
+
+/** Restrict the transfer size if necessary. */
+#define IPC_XF_RESTRICT		(1 << 0)
 
 /** Kernel IPC interfaces
Index: kernel/generic/src/ipc/sysipc.c
===================================================================
--- kernel/generic/src/ipc/sysipc.c	(revision 0b378820b4861f67ea1335ef6260a5c98a59c64c)
+++ kernel/generic/src/ipc/sysipc.c	(revision f6bffeebe3a4e9f347a03931d2c463a8718cd991)
@@ -426,7 +426,13 @@
 	case IPC_M_DATA_READ: {
 		size_t size = IPC_GET_ARG2(call->data);
-		if ((size <= 0 || (size > DATA_XFER_LIMIT)))
+		if (size <= 0)
 			return ELIMIT;
-		
+		if (size > DATA_XFER_LIMIT) {
+			int flags = IPC_GET_ARG3(call->data);
+			if (flags & IPC_XF_RESTRICT)
+				IPC_SET_ARG2(call->data, DATA_XFER_LIMIT);
+			else
+				return ELIMIT;
+		}
 		break;
 	}
@@ -435,6 +441,12 @@
 		size_t size = IPC_GET_ARG2(call->data);
 		
-		if (size > DATA_XFER_LIMIT)
-			return ELIMIT;
+		if (size > DATA_XFER_LIMIT) {
+			int flags = IPC_GET_ARG3(call->data);
+			if (flags & IPC_XF_RESTRICT) {
+				size = DATA_XFER_LIMIT;
+				IPC_SET_ARG2(call->data, size);
+			} else
+				return ELIMIT;
+		}
 		
 		call->buffer = (uint8_t *) malloc(size, 0);