34 lines
1.4 KiB
Plaintext
34 lines
1.4 KiB
Plaintext
/* $NetBSD: README,v 1.5 1995/09/16 23:20:24 pk Exp $ */
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The sparc 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 is 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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installboot /boot bootxx /dev/rsd0a
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Note: This only works with securelevel <= 0 (see init.8 manual).
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On machines with an Openboot Prom, the boot programs must retain the a.out
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header when installed on disk. On the "old monitor" machines the a.out
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header must be stripped off. Use the `-h' switch to leave the header on.
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So, on an Openboot machine you do:
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installboot -h /boot bootxx /dev/rsd0a
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Note: installboot should find this out by asking the kernel (sysctl).
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