Re: Broken .loc directive in GAS

[Michal Ludvig <mludvig at suse dot cz>]

Alan Modra told me that:
> For reference, I've attached the -S output I get from your testcase.
> I suppose it's possible that ld is being confused by your crt*, libgcc
> or libc.

It's unlikely - I did some tests and it turns out that asm produced by 
GCC from CVS (mainline and 3.3 release) give correct binary, but asm 
generated by gcc-3.3-64 from SuSE 8.2 and by gcc-3.2.2-5 from RedHat 9 
give give binaries with overlaps.

I have put some asm sources to: http://tmp.logix.cz/OffBy2/
along with a Makefile.
After you have built all four binaries run 'readelf -wl' on each of them 
and compare results. You will see that temp-rh9 and temp-sl82 have 
overlapping sequences in temp.cc entry.
At least I hope you'll see it! I tried to run it on RH8, SL8.2 and 
Gentoo and everywhere got the same result (different addresses, but 
overlapped by 2 bytes).

Is it a GCC or bug or a bug in a linker? Or does it still happening only 
in my office?

Michal Ludvig
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