Remove nested functions from readelf.c

[Timm Bäder]

On 01/02/2021 15:21, Mark Wielaard wrote:
> On Fri, 2021-01-08 at 09:16 +0100, Timm Bäder via Elfutils-devel wrote:
>> here another round for src/readelf.c. I think they are simple, but I'm
>> not happy with the advance_pc() commit. I'm open for suggestions here
>> but I can't come up with something better right now. I'll keep looking
>> in to that in the meantime.
> 
> Yeah, the advance_pc function is really why you want nested functions
> in the first place IMHO. Passing around the captured state as 6 extra
> arguments seems to not really make the code much clearer. Especially
> because on its own it isn't immediately clear what the code is about or
> that it is to be used as part of the special opcode or
> DW_LNS_advance_pc opcode (where DW_LNS_const_add_pc acts like special
> opcode 255) handling.
> 
> It might be helpful to spell out in a comment to the function which
> part of the DWARF4 6.2.5.1 Special Opcodes handling the advance_pc
> function is responsible for.
> 
> But honestly in this case I think just keeping the nested function is
> the cleanest way to handle this.
> 
> Cheers,
> 
> Mark
> 

That's what I was worried about as well of course. But I think I can
work on this a bit and solve it in a cleaner way, with some additional
refactorings. I'll try to come up with some patches.


- Timm


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