Dumping Large Binary Buffer Through Sysctl
phk at phk.freebsd.dk
Sat Nov 8 16:51:22 PST 2008
In message <5D267A3F22FD854F8F48B3D2B523819339364836FC at IRVEXCHCCR01.corp.ad.bro
adcom.com>, "David Christensen" writes:
>I'm looking for a way to dump a large binary debug buffer=20
>in a driver to a file. I've currently implemented this
>with SYSCTL_ADD_OPAQUE() and it works fine but running the
>"sysctl -a" command causes this buffer to be dumped which
>is something of a pain. Is there a better way to do this?
Much better idea: memory map it, that way your driver does
not even discover that userland peeks over its shoulder.
Poul-Henning Kamp | UNIX since Zilog Zeus 3.20
phk at FreeBSD.ORG | TCP/IP since RFC 956
FreeBSD committer | BSD since 4.3-tahoe
Never attribute to malice what can adequately be explained by incompetence.
More information about the freebsd-current