Download FreeBSD 7.2 AMD64 All Media torrent or any other torrent from Applications > UNIX Direct download via magnet link.
GNU/Linux GNU/kFreeBSD start: strace -o mytrace -s4096 -f -p PID stop: ctrl-c view: less mytrace start: ktrace -f mytrace -d -p PID stop: ktrace -c -p PID view: kdump -f mytrace -m 4096 Q. How do I run native FreeBSD under a chroot under Debian GNU/kFreeBSD? First extract the binaries from the FreeBSD ISO image: wget ftp://ftp.freebsd.org/pub/FreeBSD/releases/i386/ISO-IMAGES/8.1/FreeBSD-8.1-RELEASE-i386-disc1.iso mdconfig -a -t vnode -f FreeBSD-8.1-RELEASE-i386-disc1.iso -u 0 mount -t cd9660 -o ro /dev/md0 /mnt mkdir /srv/freebsd-8.1 cat /mnt/8.1-RELEASE/base/base.?? tar vzxf - -C /srv/freebsd-8.1 cat /mnt/8.1-RELEASE/manpages/manpages.?? tar vzxf - -C /srv/freebsd-8.1 umount /mnt mdconfig -d -u 0 Then mount devfs under the chroot with e.g.
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Mount -t devfs devfs /srv/freebsd-8.1/dev Note: bind-mounting (-t nullfs) /dev won't work here. Note2: You probably want to add /srv/freebsd-8.1/dev to /etc/fstab so that it's mounted on every boot. How do I run native FreeBSD userland tools easily? First setup a FreeBSD chroot (see Q&A above), then create a new file named /usr/local/bin/freebsd with the contents exec chroot /srv/freebsd-8.1 '$@' and make it executable. You can now run freebsd useland tools easily by prefixing the commands with freebsd: # uname GNU/kFreeBSD # freebsd uname FreeBSD Q. How do I debug the kernel? Recompile the kernel with debugging symbols and support for built-in debugger: # Make sure you have at least 4 gigabytes of disk space.
Apt-get source kfreebsd-8 cd kfreebsd-8-8.1 export QUILTPATCHES=debian/patches quilt push -a quilt new debugger.diff quilt add sys/i386/conf/GENERIC editor sys/i386/conf/GENERIC # Add the following options: # makeoptions DEBUG='-g' # options DDB # options KDB dch -i # Add a new changelog entry. # You probably want to use something like '+debugger' in the version number and # UNRELEASED in place of 'unstable'.
Quilt refresh debuild sudo debi sudo reboot Here's an example debugging story: 'ifconfig wlan0 create wlandev ath0' fails with 'ifconfig: SIOCIFCREATE2: Bad address'. By reading the source code I guess that this might be caused by copyin failing in wlanclonecreate function. I hit ctrl-alt-esc to enter the debugger prompt and add a breakpoint to that function: KDB: enter: manual escape to debugger thread pid 12 tid 100013 Stopped at kdbenter+0x3d: movl $0,kdbwhy db break wlanclonecreate db c and then proceed with the failing command using root@debian:# ifconfig wlan0 create wlandev ath0 thread pid 1309 tid 100088 Breakpoint at wlanclonecreate: pushl%ebp db Using the command 'x/x $ebp,10' you can inspect the stack which contains arguments that were passed to the wlanclonecreate function. On kfreebsd-i386 the following should be true. Address contents $ebp + 4 return address (usually the caller unless a tail call optimization is done) $ebp + 8 the first argument $ebp+12 the second argument $ebp+16 the third argument. Beware that the debugger silently converts between decimal and hexadecimal: 1+4.4 11 but 1+(4.4) 17!
If the in-kernel debugger is too primitive for your taste you can also use gdb. The easiest solution is to run the system under qemu started with the '-s' option and the to connect to it using gdb: gdb flavor-8.1-1-686/sys/i386/compile/DEBCUSTOM/kernel.debug target remote localhost:1234 Q. Is there something like LXR for browsing the FreeBSD codebase? Yes, see for kernel stuff and for userland.
What FreeBSD userland tools are still missing? FreeBSDkernel GLIBC FreeBSD FreeBSDversion GNU FreeBSD (DO NOT RELY ON IT!!) No Yes No Debian GNU/kFreeBSD Yes Yes No No No Debian GNU/Hurd No No No Debian GNU/Linux No No No No Q. Why was the choice made to use glibc? Because otherwise far more packages would need patches to build on Debian GNU/kFreeBSD. All packages in Debian GNU/Linux are known to work fine with (e)glibc. So most of the work is in only one package, the libc. The no more active tried to use the BSD libc, but not using the glibc was probably one of the reasons why it stalled.
Are there any repositories for the non-free stuff that was taken out? More information can be found from. What license is kFreeBSD released under? A: The kernel is of course BSD-licensed. But remember that the port is based on GNU libc (LGPL), and many essential tools have GNU GPL or other licenses. Please refer to individual packages' copyright files. Are the kernel patches needed to make Debian GNU/kFreeBSD work given back to FreeBSD?
Yes, you can see the patches but not all are accepted by upstream. A2: Some of the patches see the 'Status:' lines in the patches themselves. Unanswered questions Q. Can one run a Debian GNU/kFreeBSD chroot under Darwin?