From 5d521765ac3fd463517d98967c7c0d6c8ce08955 Mon Sep 17 00:00:00 2001
From: Soumen Ghosh <soumeng@codeaurora.org>
Date: Thu, 3 Aug 2017 10:13:11 +0530
Subject: [PATCH] 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 | 14 ++++++++++++++
linux-ramdump-parser-v2/ramdump.py | 13 ++++++++++++-
2 files changed, 26 insertions(+), 1 deletion(-)
mode change 100755 => 100644 linux-ramdump-parser-v2/gdbmi.py
diff --git a/linux-ramdump-parser-v2/gdbmi.py b/linux-ramdump-parser-v2/gdbmi.py
old mode 100755
new mode 100644
index 25bc112..5501c4d
--- a/linux-ramdump-parser-v2/gdbmi.py
+++ b/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')
diff --git a/linux-ramdump-parser-v2/ramdump.py b/linux-ramdump-parser-v2/ramdump.py
index 23d0a1c..07e3b56 100644
--- a/linux-ramdump-parser-v2/ramdump.py
+++ b/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))
- return True
+ 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
--
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