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SubjectRe: [PATCH v2 0/8] clean up vdso-layout.lds.S
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H. Peter Anvin píše v Po 15. 06. 2009 v 09:51 -0700:
> Petr Tesarik wrote:
> > Petr Tesarik píše v Po 15. 06. 2009 v 17:16 +0200:
> >> [...]
> >> An example can probably explain it better:
> >>
> >> $ cat >shared.c <<EOF
> >> int shared_object[100];
> >> EOF
> >> $ cat >exe.c <<EOF
> >> #include <stdio.h>
> >> extern int shared_object[100];
> >> int main(void) {
> >> printf("%p\n", &shared_object);
> >> return 0;
> >> }
> >> EOF
> >
> > BTW this example demonstrates that there is one section which should be
> > included in .data but is not:
> >
> > *(COMMON)
> >
> > I'll send a patch later.
> >
>
> *(COMMON) is BSS, not data...

Very true, but for the vDSO we decided to put both writeable and
read-only data into one section (called .data for that matter), probably
to reduce the number of sections and hence also the size of the
resulting binary.

Petr Tesarik


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