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This is a static safety-checker for SystemTap modules. It attempts to
validate modules by checking the opcodes used and the external references
against a whitelist.
The script relies on external data files to provide the whitelists, which by
default are in the <script-dir>/data directory. The 'references' file
provides a plain list of allowed references. The 'opcodes' file provides a
list of regular expressions that match allowed opcodes. Either data file may
have an optional kernel and/or architecture suffix, as in 'opcodes-i686' or
'references-2.6.9-32.ELsmp-x86_64'.
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