Date: Wed, 8 Aug 2007 12:25:36 -0500 From: Craig Boston <cb@severious.net> To: Biks N <freebsd.dev@gmail.com> Cc: freebsd-hackers@freebsd.org Subject: Re: Using userland library in Kernel Message-ID: <20070808172535.GA8404@nowhere> In-Reply-To: <50cd4e5f0708080923p1d441e66ha6b42e277b55f8d@mail.gmail.com> References: <50cd4e5f0708080923p1d441e66ha6b42e277b55f8d@mail.gmail.com>
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On Wed, Aug 08, 2007 at 11:23:25AM -0500, Biks N wrote: > I am new to FreeBSD kernel programming and I am trying to use userland > library (zlib) in FreeBSD kernel. But I am not sure if zlib library is > linkable from the kernel. Normally, no, you can't just link in a library designed for userland into the kernel. Some porting is required to deal with the kernel environment -- things such as not having a full C library available, different memory management, etc. In this case however, there is already a zlib implementation in the kernel. IIRC, geom_uzip and the crypto framework both use it. You may want to check out sys/net/zlib.[ch] and see if it can do what you're after. You'll need to make sure to include a dependency on the zlib module and/or add it to your kernel configuration. Good luck, Craig
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