MISRA stands for "Motor Industry Software Reliability Association". IAR has an Embedded Workbench which I believe is a Tester to verify the implementation for the MISRA C rules.
Does KEIL have a such a tool?
If there a PDF document available that spells out the rules. I have search and all I can find are test suites.
PC-Lint from Gimpel Software will check for compliance with MISRA coding style rules -- and do lots of other nice things for you as well.