[ros-dev] Undocumented field in PEB?

[Jun Koi]

On Fri, Mar 6, 2009 at 6:50 PM, KJK::Hyperion <hackbunny at reactos.org> wrote:
> Jun Koi wrote:
>> But in fact the next field  (CriticalSectionTimeout) starts at 0x70.
>> No matter how big it is, we  actually dont care
>
> the size doesn't matter, but the alignment does (which, in the case of
> long long on Windows, matches its size, i.e. 8). 0x6C is not a multiple
> of 8, and the smallest multiple of 8 that's higher than 0x6C is 0x70
>

Now I see the reason.

But my question then is: how to make gcc automatically align
LARGER_INTEGER fields on 8 bytes like that?

I write a small test code with the NDK headers, and compile with gcc.
The result binary put CriticalSectionTimeout at 0x6C, not at 0x70.

Because ReactOS can be compiled with gcc, I guess there is an option
for gcc to do that. But I looked around for a while to no avail.

Anybody please enlighten me?

Thanks,
J


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