* Is there a way to distinguish binary files compiled with -D_FORTIFY_SOURCE=1 and -D_FORTIFY_SOURCE=2?
@ 2021-04-09 0:12 Peng Yu
2021-04-09 17:17 ` Carlos O'Donell
0 siblings, 1 reply; 2+ messages in thread
From: Peng Yu @ 2021-04-09 0:12 UTC (permalink / raw)
To: libc-help
https://gcc.gnu.org/legacy-ml/gcc-patches/2004-09/msg02055.html
When I compile a .c file with -D_FORTIFY_SOURCE=1 and
-D_FORTIFY_SOURCE=2, the binary files both contain symbols like
..._chk@...
So I can not tell whether _FORTIFY_SOURCE is 1 or 2 just by whether
symbols have ..._chk@....
Is there a way to tell the difference only from the binary file?
--
Regards,
Peng
^ permalink raw reply [flat|nested] 2+ messages in thread
* Re: Is there a way to distinguish binary files compiled with -D_FORTIFY_SOURCE=1 and -D_FORTIFY_SOURCE=2?
2021-04-09 0:12 Is there a way to distinguish binary files compiled with -D_FORTIFY_SOURCE=1 and -D_FORTIFY_SOURCE=2? Peng Yu
@ 2021-04-09 17:17 ` Carlos O'Donell
0 siblings, 0 replies; 2+ messages in thread
From: Carlos O'Donell @ 2021-04-09 17:17 UTC (permalink / raw)
To: Peng Yu; +Cc: libc-help
On Thu, Apr 8, 2021 at 8:12 PM Peng Yu via Libc-help
<libc-help@sourceware.org> wrote:
>
> https://gcc.gnu.org/legacy-ml/gcc-patches/2004-09/msg02055.html
>
> When I compile a .c file with -D_FORTIFY_SOURCE=1 and
> -D_FORTIFY_SOURCE=2, the binary files both contain symbols like
> ..._chk@...
>
> So I can not tell whether _FORTIFY_SOURCE is 1 or 2 just by whether
> symbols have ..._chk@....
>
> Is there a way to tell the difference only from the binary file?
If you want to know about this feature you want to know about all the features.
In Fedora and in RHEL we use annobin to answer this question:
https://fedoraproject.org/wiki/Changes/Annobin
Cheers,
Carlos.
^ permalink raw reply [flat|nested] 2+ messages in thread
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2021-04-09 0:12 Is there a way to distinguish binary files compiled with -D_FORTIFY_SOURCE=1 and -D_FORTIFY_SOURCE=2? Peng Yu
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