[3.15] gh-139808: Add branch protections for aarch64 in asm_trampoline.S (GH-130864)#149730
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….S (pythonGH-130864) Apply protection against ROP/JOP attacks for aarch64 on asm_trampoline.S. The BTI flag must be applied in assembler sources for this class of attacks to be mitigated on newer aarch64 processors. See also: https://sourceware.org/annobin/annobin.html/Test-branch-protection.html and https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/enabling-pac-and-bti-on-aarch64 (cherry picked from commit da8477b25c6124c961306d4d7cd5ec7dafda6be4) Co-authored-by: stratakis <cstratak@redhat.com> Co-authored-by: Victor Stinner <vstinner@python.org>
This was referenced May 12, 2026
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Apply protection against ROP/JOP attacks for aarch64 on asm_trampoline.S.
The BTI flag must be applied in assembler sources for this class
of attacks to be mitigated on newer aarch64 processors.
See also:
https://sourceware.org/annobin/annobin.html/Test-branch-protection.html
and
https://community.arm.com/arm-community-blogs/b/architectures-and-processors-blog/posts/enabling-pac-and-bti-on-aarch64
(cherry picked from commit da8477b)
Co-authored-by: stratakis cstratak@redhat.com
Co-authored-by: Victor Stinner vstinner@python.org