Re: /dev/kmem

From: Russell King (rmk@arm.linux.org.uk)
Date: Sat May 06 2000 - 11:34:51 EST


George Anzinger writes:
> The question is which of the several kernels was booted? Does the boot
> code leave this somewhere it can be found? For example, a program can
> look at its 0'th parameter to find the file name it is running under.
> Can the system do something like this?

Yes. I believe lilo passes something like a "BOOT_IMAGE=" parameter to
the kernel when it boots. The value that gets passed is the label
name of the running kernel in /etc/lilo.conf.

If you make the labels the same as an extension to the System.map file,
you can easily pull this from /proc/cmdline, and insert the relevent
link at run time.
   _____
  |_____| ------------------------------------------------- ---+---+-
  | | Russell King rmk@arm.linux.org.uk --- ---
  | | | | http://www.arm.linux.org.uk/~rmk/aboutme.html / / |
  | +-+-+ --- -+-
  / | THE developer of ARM Linux |+| /|\
 / | | | --- |
    +-+-+ ------------------------------------------------- /\\\ |

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