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| From: | i at maskray dot me |
| Subject: | [Bug ld/29072] ld silently make the program stack area executable if nested function is used |
| Date: | Thu, 21 Apr 2022 06:48:02 +0000 |
https://sourceware.org/bugzilla/show_bug.cgi?id=29072
Fangrui Song <i at maskray dot me> changed:
What |Removed |Added
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CC| |i at maskray dot me
--- Comment #9 from Fangrui Song <i at maskray dot me> ---
I think in 2022 we should consider this https://www.airs.com/blog/archives/518
> These days we could probably change the default: we could probably say that
> if an object file does not have a .note.GNU-stack section, then it does not
> require an executable stack.
Only give an executable stack if -z execstack is specified. This is ld.lld's
choice and (until one day ago mold's choice). Taking the address of a nested
function is so rare that I am unsure having an on-demand state is useful.
FWIW Clang doesn't supported GCC nested functions.
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