[Buildroot] [PATCH] gcc: powerpc32 transition to secureplt
Peter Korsgaard
peter at korsgaard.com
Tue Sep 29 19:09:23 UTC 2020
>>>>> "Matthew" == Matthew Weber <matthew.weber at rockwellcollins.com> writes:
> Peter,
> On Wed, Sep 23, 2020 at 10:29 AM Matt Weber
> <matthew.weber at rockwellcollins.com> wrote:
>>
>> PowerPC has two PLT models: BSS-PLT and Secure-PLT. BSS-PLT uses
>> runtime code generation to generate the PLT stubs. Secure-PLT was
>> introduced with GCC 4.1 and Binutils 2.17 (base has GCC 4.2.1 and
>> Binutils 2.17), and is a more secure PLT format, using a read-only
>> linkage table, with the dynamic linker populating a non-executable
>> index table.
>>
>> Ref to other distro/BSD transitions
>> https://patchwork.openembedded.org/patch/106621/
>> https://reviews.freebsd.org/D20598
>>
>> Fixes a bug observed when creating SELinux policy where all apps
>> require execmem because the heap requires execute before this
>> change.
>>
> This also applies to 2020.02.x and the previous release 2020.08.
Committed to 2020.02.x, 2020.05.x and 2020.08.x, thanks.
--
Bye, Peter Korsgaard
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