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Date:      Wed, 14 Oct 1998 11:25:57 +0930
From:      Greg Lehey <grog@lemis.com>
To:        John Polstra <jdp@polstra.com>, peter@netplex.com.au
Cc:        current@FreeBSD.ORG
Subject:   Re: Make elf release
Message-ID:  <19981014112557.B21983@freebie.lemis.com>
In-Reply-To: <199810140056.RAA20027@austin.polstra.com>; from John Polstra on Tue, Oct 13, 1998 at 05:56:09PM -0700
References:  <199810132359.HAA02821@spinner.netplex.com.au> <199810140056.RAA20027@austin.polstra.com>

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On Tuesday, 13 October 1998 at 17:56:09 -0700, John Polstra wrote:
> In article <199810132359.HAA02821@spinner.netplex.com.au>,
> Peter Wemm  <peter@netplex.com.au> wrote:
>
>> It's GDB that is the problem - it can't see KLD modules.  Mind you, it
>> can't see LKM's either.
>
> Just to clarify -- GDB can see them if you tell it where they are.
> For example, if I wanted to debug the star saver, I'd first run
> modstat to find out where it's loaded:
>
>     Type     Id Off Loadaddr Size Info     Rev Module Name
>     MISC      0   0 f2fe0000 0008 f2fe1000   1 star_saver_mod
>
> Then in GDB, I'd say:
>
>     add-symbol-file /lkm/star_saver_mod.o 0xf2fe0020
>
> Note, I had to add 0x20 to the load address to account for the size
> of the a.out header.

OK, you've shown yours, I'll show mine.  Here's a gdb
macro/function/whatever that accesses this same information
internally:

def tr
if (lkmods[0].area != 0)
  printf "   asf 0x%x\n", lkmods[0].area
  add-symbol-file /T/vinum/cybernet/vinum_mod.o lkmods[0].area + 0x20
end

Greg
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