diff --git a/src/system/libroot/os/arch/arm/Jamfile b/src/system/libroot/os/arch/arm/Jamfile
index 52b5f241fb..2ebb171b6d 100644
--- a/src/system/libroot/os/arch/arm/Jamfile
+++ b/src/system/libroot/os/arch/arm/Jamfile
@@ -9,6 +9,7 @@ MergeObject os_arch_$(TARGET_ARCH).o :
 	atomic.S
 	byteorder.S
 	system_time.c
+	stack_frame.c
 	thread.c
 	time.c
 	tls.c
diff --git a/src/system/libroot/os/arch/arm/stack_frame.c b/src/system/libroot/os/arch/arm/stack_frame.c
new file mode 100644
index 0000000000..30223cbcea
--- /dev/null
+++ b/src/system/libroot/os/arch/arm/stack_frame.c
@@ -0,0 +1,27 @@
+/*
+ * Copyright 2012, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		François Revol <revol@free.fr>
+ */
+
+#include <SupportDefs.h>
+
+#include <libroot_private.h>
+
+
+void*
+get_stack_frame(void)
+{
+	// TODO: Implement!
+	return NULL;
+}
+
+
+void*
+__arch_get_caller(void)
+{
+	// TODO: Implement!
+	return NULL;
+}
diff --git a/src/system/libroot/os/arch/arm/system_time.c b/src/system/libroot/os/arch/arm/system_time.c
index 7fd1fd4dd1..6514ae92e4 100644
--- a/src/system/libroot/os/arch/arm/system_time.c
+++ b/src/system/libroot/os/arch/arm/system_time.c
@@ -1,6 +1,9 @@
 /*
- * Copyright 2006, Ingo Weinhold <bonefish@cs.tu-berlin.de>.
- * All rights reserved. Distributed under the terms of the MIT License.
+ * Copyright 2012, Haiku, Inc.
+ * Distributed under the terms of the MIT License.
+ *
+ * Authors:
+ *		François Revol <revol@free.fr>
  */
 
 #include <OS.h>
@@ -9,10 +12,29 @@
 #include <libroot_private.h>
 #include <real_time_data.h>
 
+static vint32 *sConversionFactor;
+
+void
+__arm_setup_system_time(vint32 *cvFactor)
+{
+	sConversionFactor = cvFactor;
+}
+
+
+//XXX: this is a hack
+// remove me when platform code works
+static int64
+__arm_get_time_base(void)
+{
+	static uint64 time_dilation_field = 0;
+	return time_dilation_field++;
+}
 
 bigtime_t
 system_time(void)
 {
-#warning ARM:WRITEME
-	return 0;
+	uint64 timeBase = __arm_get_time_base();
+
+	uint32 cv = *sConversionFactor;
+	return (timeBase >> 32) * cv + (((timeBase & 0xffffffff) * cv) >> 32);
 }