[Bug ld/20995] Read-only data in ELF libraries may be remapped writable at runtime

[jiwang at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=20995

Jiong Wang <jiwang at gcc dot gnu.org> changed:

           What    |Removed                     |Added
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                 CC|                            |jiwang at gcc dot gnu.org

--- Comment #12 from Jiong Wang <jiwang at gcc dot gnu.org> ---
(In reply to Alan Modra from comment #11)
> I deliberately left the arm FAILs showing.  They are telling you that -z
> relro does not wotk on those target variants.  That should probably be fixed.

Reading the comment at
https://sourceware.org/ml/binutils/2017-01/msg00094.html, I feel we should
define COMMONPAGESIZE for arm-none-eabi, searching src/bfd and src/ld, the only
usage of it is to initialize config.commonpagesize which is later used to
expand "CONSTANT (COMMONPAGESIZE)" when COMMONPAGESIZE is used in linker script
which only play a role when calculating relro_end.

If the runtime doesn't support GNU_RELRO, then I looks to me the user is
responsible to make sure don't pass -z relro to the linker.

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