Teach analyze-migration.py about section footers

Signed-off-by: Dr. David Alan Gilbert <dgilbert@redhat.com>
Signed-off-by: Juan Quintela <quintela@redhat.com>

scripts/analyze-migration.py

@@ -474,6 +474,7 @@ class MigrationDump(object):
     QEMU_VM_SECTION_FULL  = 0x04
     QEMU_VM_SUBSECTION    = 0x05
     QEMU_VM_VMDESCRIPTION = 0x06
+    QEMU_VM_SECTION_FOOTER= 0x7e
 
     def __init__(self, filename):
         self.section_classes = { ( 'ram', 0 ) : [ RamSection, None ],
@@ -526,6 +527,10 @@ def read(self, desc_only = False, dump_memory = False, write_memory = False):
             elif section_type == self.QEMU_VM_SECTION_PART or section_type == self.QEMU_VM_SECTION_END:
                 section_id = file.read32()
                 self.sections[section_id].read()
+            elif section_type == self.QEMU_VM_SECTION_FOOTER:
+                read_section_id = file.read32()
+                if read_section_id != section_id:
+                    raise Exception("Mismatched section footer: %x vs %x" % (read_section_id, section_id))
             else:
                 raise Exception("Unknown section type: %d" % section_type)
         file.close()