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From: Petr Salinger <[EMAIL PROTECTED]>
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Subject: kfreebsd-5: please leave page zero unmapped
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Package: kfreebsd-5  

Hi.

ELF loader /lib/ld.so.1 is mapped in memory at address 0.

$ cat /proc/self/maps 
00000000-00012000 r-xp 00016000 00:00 94246     /lib/ld-2.3.so
00012000-00013000 rw-p 00001000 00:00 0
08048000-0804c000 r-xp 00004000 00:00 94294     /bin/cat
0804c000-0804d000 rw-p 00002000 00:00 0
0804d000-0804e000 rwxp 00002000 00:00 0
2804c000-2804d000 rwxp 00001000 00:00 0
2804d000-28057000 r-xp 0000a000 00:00 73652     /etc/ld.so.cache
28057000-28160000 r-xp 0010e000 00:00 94249     /lib/libc-2.3.so
28160000-28164000 rwxp 0010e000 00:00 94249     /lib/libc-2.3.so
28164000-28168000 rwxp 00004000 00:00 0
bfbe0000-bfc00000 rwxp 00020000 00:00 0


Therefore reading of NULL pointers is not caught.

I don't know where is decided base adress for /lib/ld.so.1.

Thanks

        Petr




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Date: Fri, 18 Nov 2005 13:19:41 +0100
From: Robert Millan <[EMAIL PROTECTED]>
To: Aurelien Jarno <[EMAIL PROTECTED]>
Cc: Glibc/k*BSD <[EMAIL PROTECTED]>,
        [EMAIL PROTECTED]
Subject: Re: rebuild of glibc-2.3.0 for kfreeBSD (packages to test)
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This closes #336496, I'm CCing -done.

On Fri, Nov 18, 2005 at 10:07:36AM +0100, Aurelien Jarno wrote:
> 
> Hi all,
> 
> I have spent the night on the glibc packages and, thanks to Petr
> Salinger we provide me the patches, we now have new packages of the
> glibc 2.3. Tests packages are available from:
> 
>   http://io.debian.net/~aurel32/glibc
> 
> They mainly fix problem of ET_DYN/ET_EXEC so that we could now get rid
> of the ugly patch in binutils, the fact that ld.so was mapped at
> 0x00000000, rpcgen which is now compatible with gcc-4.0, the sys_errlist
> symbol which was not available, plus some minor fixes.
> 
> If you could, please test these packages. Note that you need a kernel
> 5.4 (which supports ET_DYN and ET_EXEC linker).
> 
> If everything is ok, I will upload it soon.
> 
> Aurelien
> 
> -- 
>   .''`.  Aurelien Jarno                   | GPG: 1024D/F1BCDB73
>  : :' :  Debian developer           | Electrical Engineer
>  `. `'   [EMAIL PROTECTED]         | [EMAIL PROTECTED]
>    `-    people.debian.org/~aurel32 | www.aurel32.net
> 
> _______________________________________________
> Glibc-bsd-devel mailing list
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-- 
Robert Millan


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