Re: [PATCH 2/4] Add a dwarf unit type to represent 24 bit values.

John Darrington
2018-09-27T05:49:41Z

On Wed, Sep 26, 2018 at 10:53:34PM -0400, Simon Marchi wrote:
On 2018-09-26 13:41, John Darrington wrote:
> After discussion with the gcc folks, it seems that there is an easier
> and much simpler solution, which I'm attaching.
>
> J'

Err can you explain how this works, or link to the gcc discussion if it's
explained there? I must be missing something, because as far as I
understand, this will read 4 bytes when reading an address, when I
suppose it's encoded with 3 bytes in the DWARF info, isn't it?

Simon

The relevant discussion is here: https://gcc.gnu.org/ml/gcc-patches/2018-09/msg00712.html

The bottom line is that the dwarf address size does not need to
correspond to the machine address size (and in general it does not) -
it just needs to be at least as long.

J'

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