Add flashrom memory layout detection by FMAP (using fmap_decode)

client/site_tests/hardware_Components/hardware_Components.py

Index: client/site_tests/hardware_Components/hardware_Components.py
diff --git a/client/site_tests/hardware_Components/hardware_Components.py b/client/site_tests/hardware_Components/hardware_Components.py
index 8574e0b79e62e7e2c724b233ab3781218f30d1e0..ae4ff06825238118fe284b83011d00fd18facecb 100644
--- a/client/site_tests/hardware_Components/hardware_Components.py
+++ b/client/site_tests/hardware_Components/hardware_Components.py
@@ -239,7 +239,9 @@ class hardware_Components(test.test):
             raise error.TestError('Cannot select BIOS flashrom')
         base_img = flashrom.read_whole()
         flashrom_size = len(base_img)
-        layout = flashrom.detect_chromeos_bios_layout(flashrom_size)
+        # XXX we can NOT trust base image here for layout, otherwise firmware
+        # can provide fake (non-used) GBB/BSTUB in garbage area.
+        layout = flashrom.detect_chromeos_bios_layout(flashrom_size, None)
         if not layout:
             raise error.TestError('Cannot detect ChromeOS flashrom laout')
         hash_src = ''
@@ -268,7 +270,8 @@ class hardware_Components(test.test):
             raise error.TestError('Cannot select BIOS flashrom')
         base_img = flashrom.read_whole()
         flashrom_size = len(base_img)
-        layout = flashrom.detect_chromeos_bios_layout(flashrom_size)
+        # we can trust base image for layout, since it's only RW.
+        layout = flashrom.detect_chromeos_bios_layout(flashrom_size, base_imge)
         if not layout:
             raise error.TestError('Cannot detect ChromeOS flashrom laout')
         for index, name in enumerate(section_names):