On Fri, Jun 17, 2016 at 7:31 AM, Sangjin Han <tinysun....@gmail.com> wrote:
> Hi,
>
> When linking libswiftCore.so, gold linker with --warn-execstack option
> generates following messages.
> /usr/bin/ld.gold: warning: lib/swift/linux/x86_64/swift_begin.o: missing
> .note.GNU-stack section implies executable stack
> /usr/bin/ld.gold: warning: lib/swift/linux/x86_64/swift_end.o: missing
> .note.GNU-stack section implies executable stack
>
> I found the web page about the GNU-stack section.
> http://en.chys.info/2010/12/note-gnu-stack/
>
> After quick testing in my build system (Linux + execstack -q), I think we
> should append one line to stdlib/public/runtime/swift_sections.S, or pass
> the proper option to the linker.
> The line is
> .section .note.GNU-stack,"",@progbits
> and the option is
> '-z noexecstack' (or -Wl,-z -Wl,noexecstack for clang++).
The patch would be much better I think. Thank you very much for the
investigation! Could you submit a pull request?
Dmitri
--
main(i,j){for(i=2;;i++){for(j=2;j<i;j++){if(!(i%j)){j=0;break;}}if
(j){printf("%d\n",i);}}} /*Dmitri Gribenko <griboz...@gmail.com>*/
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