[PATCH] D41723: Introduce the "retpoline" x86 mitigation technique for variant #2 of the speculative execution vulnerabilities disclosed today, specifically identified by CVE-2017-5715, "Branch Target Injection", and is one of the two halves to Spectre..

[Rui Ueyama via Phabricator via llvm-commits]

ruiu added a comment.

Chandler,

Please apply https://reviews.llvm.org/D41744 to this patch. It includes the following changes:

1. xchg is replaced with mov/pop instructions
2. x86-64 lazy PLT relocation target is now aligned to 16 byte
3. the x86-64 PLT header for lazy PLT resolution is shrunk from 48 bytes to 32 bytes (which became possible by utilizing the space made by (2))


https://reviews.llvm.org/D41723