Re: silly [< >] and other excess

[Russell King <rmk@arm.linux.org.uk>]

Albert D. Cahalan writes:
> Yes. Don't you look at the raw data anyway?

I look at the raw stack data from time to time, but mostly I want
the backtrace, PC and LR converted into something more meaningful,
and I don't want the extra clutter of that particular raw data.

> In theory yes, but in practice no. Your kernel isn't a significant
> portion of your address space, so the chance of random data being
> looked up successfully is very low. Maybe a 1% chance on 32-bit
> hardware, and far less on 64-bit hardware.

Not so.  This is my point; on the ARM, when you get stuff like stack
and registers dumped, a lot of the hex numbers can look very much like
addresses in kernel space; most of them are data object symbols and
the like.  There can be a lot of these, and suddenly you'd end up with
most of the System.map being output because something in the dump
somewhere looks like its a symbol.

> Somebody else posted a reasonable hack for the [<>] problem.
> His proposal involved letting multiple values share the same
> markers, something like this:

Yep, now that is one idea I like!
   _____
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  |   |         Russell King        rmk@arm.linux.org.uk      --- ---
  | | | | http://www.arm.linux.org.uk/personal/aboutme.html   /  /  |
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  /   |               THE developer of ARM Linux              |+| /|\
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