[Fwd: Re: gas (or maybe gdb/gcc) problem with o64 Mips and DWARF]

[Eric Christopher]

> The problem appears to be in gas/dwarf2dbg.c in function dwarf2_finish()
> which has the following:
> 
>  /* Calculate the size of an address for the target machine.  */
>   sizeof_address = bfd_arch_bits_per_address (stdoutput) / 8;
> 
> So gas is not getting address size from the compilation unit header, but
> from the architecture, which for mips64-elf is "mips:4000".  So how
> should this work?  I cannot see how to grab info from the CU header. And
> I don't know how else to find out from GCC what size a pointer is.
> 
> (What happens if I add "-mlong64" to the compile line?  Now gcc
> generates CUs with 64-bit addresses and gas agrees and all works well.)
> 

Right. This is a known bug in the mips port right now where we have two
different possible pointer sizes, however, bfd's static tables only have
one entry. I/someone will need to construct duplicate tables for 32 and
64-bit pointers.

-eric

-- 
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