CVS commit: src/sys/net

["Alexander Nasonov" <alnsn%netbsd.org@localhost>]

Module Name:    src
Committed By:   alnsn
Date:           Sat Jul  5 22:06:11 UTC 2014

Modified Files:
        src/sys/net: bpf_filter.c

Log Message:
Implement error checking in m_xbyte() and check for errors after m_xbyte() call.
Reuse (len - k) expression in m_xword() and m_xhalf() to give an optimization
hint to a compiler.

When m_xbyte() didn't exist, bpf_filter() handled out-of-bounds BPF_B loads
correctly because "return 0" inside MINDEX() was aborting filter programs.
After the change that added m_xbyte() zero values were passed to A or X
registers instead of aborting a filter program.


To generate a diff of this commit:
cvs rdiff -u -r1.65 -r1.66 src/sys/net/bpf_filter.c

Please note that diffs are not public domain; they are subject to the
copyright notices on the relevant files.