tree 07693bd333216d837c999002b60f002c52dc3a55
parent ff763f2e557af2ac822ec06b37f2585d63eb5ede
author Tulio Magno Quites Machado Filho <tuliom@redhat.com> 1723574081 -0300
committer Copybara-Service <copybara-worker@google.com> 1723574161 -0700

[OpenMP][AArch64] Fix branch protection in microtasks (#102317)

Start __kmp_invoke_microtask with PACBTI in order to identify the
function as a valid branch target. Before returning, SP is
authenticated.
Also add the BTI and PAC markers to z_Linux_asm.S.

With this patch, libomp.so can now be generated with DT_AARCH64_BTI_PLT
when built with -mbranch-protection=standard.

The implementation is based on the code available in compiler-rt.

GitOrigin-RevId: 0aa22dcd2f6ec5f46b8ef18fee88066463734935