50 lines
1.3 KiB
Plaintext
50 lines
1.3 KiB
Plaintext
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/* Beware: mostly obsolete info */
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This is the first (alpha) release of kernel packer/unpacker
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for FreeBSD. It is based on xBoot from Linux, but
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hardly rewritten.
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It assumes that:
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1) The kernel should be loaded at 0x100000 phys address.
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2) The CS selector is equal to 8, which is OK for all
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current secondary boot programs.
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Run "make install" to install it. It will place
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"kzip" shell script into /usr/sbin, and several files
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into /usr/libexec/kzip directory.
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Then try to zip your kernel, for example:
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% kzip /kernel
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System size is 462848
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Compressed size 247027
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It will create file /kernel.kz:
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% ls -l /kernel /kernel.kz
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-rwxr-xr-x 1 root 497297 Oct 8 12:41 /386bsd
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-rwxrwxr-x 1 root 262144 Oct 8 13:37 /386bsd.kz
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Then rename /kernel.kz to /kernel and reboot.
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% mv /kernel /o3kernel
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% mv /kernel.kz /kernel
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% sync
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% reboot
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During booting, you will see the message:
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Uncompressing kernel...done
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Booting the kernel
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The packed kernel should load and run.
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The main problem with packed kernel is the lack of symbol table,
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so all commands that require it, will not run.
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Among them: ps, savecore, *stat, etc.
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Packed kernels are good for install and fixit floppies.
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Serge Vakulenko, <vak@zebub.msk.su>
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Opdated for FreeBSD 2.1 by Gary Jennejohn 12FEB95
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