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| author |   Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-05-07 18:30:12 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-07-08 15:02:38 +0100 |
| commit | 9e1751e6d693b73b95db2f6d8438dd80f1aeffe0 (patch) | |
| tree | 40ece1a3b2681b7152ec3e7352e97bcd340e17b8 /scripts/build-many-glibcs.py | |
| parent | aarch64: ensure objects are BTI compatible (diff) | |
| download | glibc-9e1751e6d693b73b95db2f6d8438dd80f1aeffe0.tar.xz glibc-9e1751e6d693b73b95db2f6d8438dd80f1aeffe0.zip | |
aarch64: configure check for pac-ret code generation
Return address signing requires unwinder support, which is
present in libgcc since >=gcc-7, however due to bugs the
support may be broken in <gcc-10 (and similarly there may
be issues in custom unwinders), so pac-ret is not always
safe to use. So in assembly code glibc should only use
pac-ret if the compiler uses it too. Unfortunately there
is no predefined feature macro for it set by the compiler
so pac-ret is inferred from the code generation.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
Diffstat (limited to 'scripts/build-many-glibcs.py')
0 files changed, 0 insertions, 0 deletions