Re: readelf seems broken in F33

2020-10-06 Thread Jeff Law

On 10/6/20 3:05 PM, Florian Weimer wrote:
> * Steve Grubb:
>
>> I was doing some binary analysis of files in F33 and have run across
>> something odd.
>>
>> readelf -s  /usr/sbin/auditd | grep GLIBC
>>
>> produces a lot of output like:
>>
>>182: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
>> (3)
>>184: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
>> (3)
>>185: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
>> (3)
>>186: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
>> (3)
>>187: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.3.2 
>> (2)
>>191: 0 FUNCGLOBAL DEFAULT  UND alarm@GLIBC_2.2.5 
>> (3)
>>194: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
>> (3)
>>195: 0 FUNCGLOBAL DEFAULT  UND close@GLIBC_2.2.5 
>> (3)
>>197: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
>> (3)
>>
>> It's missing a lot of symbols. Is this something with readelf or an odd
>> effect of the LTO changes?
> This question looks familiar.
>
> It's a deliberate change to indicate truncation.  Use readelf -sW if you
> want to avoid it.  Truncation has been silent before, so it's necessary
> to educate users about readelf -W.

I think I may have used --wide in my test because I wanted to see more
info...


jeff
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Re: readelf seems broken in F33

2020-10-06 Thread Florian Weimer
* Steve Grubb:

> I was doing some binary analysis of files in F33 and have run across
> something odd.
>
> readelf -s  /usr/sbin/auditd | grep GLIBC
>
> produces a lot of output like:
>
>182: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>184: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>185: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>186: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>187: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.3.2 
> (2)
>191: 0 FUNCGLOBAL DEFAULT  UND alarm@GLIBC_2.2.5 
> (3)
>194: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>195: 0 FUNCGLOBAL DEFAULT  UND close@GLIBC_2.2.5 
> (3)
>197: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>
> It's missing a lot of symbols. Is this something with readelf or an odd
> effect of the LTO changes?

This question looks familiar.

It's a deliberate change to indicate truncation.  Use readelf -sW if you
want to avoid it.  Truncation has been silent before, so it's necessary
to educate users about readelf -W.

Thanks,
Florian
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Re: readelf seems broken in F33

2020-10-06 Thread Jeff Law

On 9/16/20 3:44 PM, Steve Grubb wrote:
> Hello,
>
> I was doing some binary analysis of files in F33 and have run across 
> something odd.
>
> readelf -s  /usr/sbin/auditd | grep GLIBC
>
> produces a lot of output like:
>
>182: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>184: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>185: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>186: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>187: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.3.2 
> (2)
>191: 0 FUNCGLOBAL DEFAULT  UND alarm@GLIBC_2.2.5 
> (3)
>194: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>195: 0 FUNCGLOBAL DEFAULT  UND close@GLIBC_2.2.5 
> (3)
>197: 0 FUNCGLOBAL DEFAULT  UND [...]@GLIBC_2.2.5 
> (3)
>
> It's missing a lot of symbols. Is this something with readelf or an odd
> effect of the LTO changes?

Odd, I'm running F33 bits here and I get 159 symbols from running that
(out of 206 total symbols).


jeff




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