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Message-ID: <20121119003643.GW20323@brightrain.aerifal.cx>
Date: Sun, 18 Nov 2012 19:36:44 -0500
From: Rich Felker <dalias@...ifal.cx>
To: musl@...ts.openwall.com
Subject: Re: debloating data, bss
On Sun, Nov 18, 2012 at 11:59:12PM +0100, Szabolcs Nagy wrote:
> * Rich Felker <dalias@...ifal.cx> [2012-11-18 16:03:53 -0500]:
> >
> > 908 160 12 1080 438 random.o (ex lib/libc.a)
> >
> > Unfortunately I think random really does have that much state...
> >
>
> interestingly the data segment has different size here
> (i386, gcc-4.4.3, default config):
>
> $ size libc.a |grep random
> 841 140 12 993 3e1 random.o (ex libc.a)
>
> and looking into the code it seems there is indeed 140 bytes
> of initialized static data (and 12bytes of zero)
Very odd. That's what I counted too, and what the total looks like it
should be based on "nm --size". Perhaps gcc is adding some
padding/alignment to the data segment?
Rich
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