Date: Sun, 09 Nov 2008 00:19:42 +0000 From: "Poul-Henning Kamp" <phk@phk.freebsd.dk> To: "David Christensen" <davidch@broadcom.com> Cc: "freebsd-current@freebsd.org" <freebsd-current@freebsd.org> Subject: Re: Dumping Large Binary Buffer Through Sysctl Message-ID: <44603.1226189982@critter.freebsd.dk> In-Reply-To: Your message of "Sat, 08 Nov 2008 14:16:19 PST." <5D267A3F22FD854F8F48B3D2B523819339364836FC@IRVEXCHCCR01.corp.ad.broadcom.com>
next in thread | previous in thread | raw e-mail | index | archive | help
In message <5D267A3F22FD854F8F48B3D2B523819339364836FC@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@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.
Want to link to this message? Use this URL: <https://mail-archive.FreeBSD.org/cgi/mid.cgi?44603.1226189982>