1995-06-02 00:37:44 +04:00
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/* $NetBSD: README,v 1.1.1.2 1995/06/01 20:37:47 gwr Exp $ */
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1995-02-15 01:56:36 +03:00
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The sun bootblocks are split into two parts: a small 1st-level program that
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gets written right after the superblock in a partition (and is hence limited
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in size to SBSIZE - DEV_BSIZE bytes), and a 2nd-level program that resides
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in the filesystem proper.
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The 1st-level program is loaded into memory by the PROM. It loads the second
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stage program from a set of filesystem block numbers that are hard-coded
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into it by the `installboot' program. The prototype code for the 1st-level
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bootblocks are in `bootxx'.
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The 2nd-level program (`boot') is normally installed in the root directory
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as `/boot'. It uses the device drivers in the PROM and the stand-alone
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filesystem code in `libsa.a' to locate and load the kernel.
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Use the following command to install the 1st-level bootblocks in the
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root filesystem (on `sd0a') using the file `/boot' as the second level
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boot program:
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1995-06-02 00:37:44 +04:00
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mount /dev/sd0a /mnt
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installboot /mnt/boot bootxx /dev/rsd0a
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The above only works with securelevel <= 0 (see init.8 manual).
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Status:
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bootxx, installboot are tested and working. It would be nice if
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installboot would find the inumber for the 2nd stage boot program
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without having the filesystem mounted so this command can work
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with securelevel==1 (the default). Doing this requies adding
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code to read and do a directory lookup in the root...
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netboot does not work yet... (netif_sun stuff in libsa not done)
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Note:
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Before installation, the second stage boot programs (ufsboot, ...)
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need the a.out header stripped off. For now I do this by hand
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using the following command. This needs to be automated...
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dd ibs=32 skip=1 if=a.out.file | dd conv=sync of=no.header.file
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