[Tinyos-devel] nesc.xml bitoffset error

[WenZhan Song]

I absolutely agree with you - somewhere is wrong.

On Feb 7, 2008 11:55 AM, David Gay <dgay42 at gmail.com> wrote:

> On Feb 7, 2008 11:25 AM, WenZhan Song <wenzhan.song at gmail.com> wrote:
> > David,
> >
> > Your suggestions can correct the XML bitoffset problem of non-packed
> > structure, but it does not solve the second problem:
> >
> http://sensorweb.vancouver.wsu.edu/wiki/index.php/Tips#Problem2:_If_not.2C_the_initial_values_are_even_set_to_the_wrong_addresse_in_memory
> >
> > According to our test, without "structure_size_boundary=32", it works
> great
> > if we always define packed structure. With it, it even has problems with
> > "packed" structure.
>
> I'll look at the details later, but the nesC compiler has no influence
> on the layout of regular C structures (as opposed to nx_structs, which
> are layed out by nesC). If you're not getting what you expect in terms
> of layout from a C structure, either:
> - there's a bug in gcc
> - you're not understanding gcc's layout rules for your architecture
> correctly
>
> David Gay
>
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