lrdp-v2: vmlinux linux banner timestamp matching with ramdump

	Read the linux banner data from vmlinux rodata section.
	Also read the linux banner data from ramump. Do a matching of both the data.
	If success then ramparser will go ahead and proces further
Change-Id: I1b9245f1a4fcc9cdff0a3bfb7293b2385981feba

linux-ramdump-parser-v2/gdbmi.py

@@ -291,6 +291,20 @@ class GdbMI(object):
         result = self._run_for_one('print /d {0}'.format(symbol))
         return int(result.split(' ')[-1], 10)
 
+
+    def get_value_of_string(self, symbol):
+        """Returns the value of a symbol (as a string)"""
+        cmd = 'print /s {0}'.format(symbol)
+        result = self._run(cmd)
+        if len(result.lines) == 0:
+            raise GdbMIException(
+                            cmd, '\n'.join(result.lines + result.oob_lines))
+        match = re.search(r'^[$]\d+ = \\"(.*)(\\\\n\\")', result.lines[0])
+        if match:
+            return match.group(1)
+        return None
+
+
 if __name__ == '__main__':
     if len(sys.argv) != 3:
         print('Usage: gdbmi.py gdb_path elf')

linux-ramdump-parser-v2/ramdump.py

@@ -831,7 +831,18 @@ class RamDump():
 
             print_out_str('Linux Banner: ' + b.rstrip())
             print_out_str('version = {0}'.format(self.version))
+            vm_v = self.gdbmi.get_value_of_string('linux_banner')
+            if vm_v is None:
+                print_out_str('!!! Could not read banner address from vmlinux!')
+                return False
+            if str(vm_v) in str(b):
+                print_out_str("Linux banner from vmlinux = %s" % vm_v)
+                print_out_str("Linux banner from dump = %s" % b)
                 return True
+            else:
+                print_out_str("Expected Linux banner = %s" % vm_v)
+                print_out_str("But Linux banner got = %s" % b)
+                return False
         else:
             print_out_str('!!! Could not lookup banner address')
             return False