[PATCH] D80791: [AArch64] Generate .note.gnu.property based on module flags.

Momchil Velikov via Phabricator via cfe-commits cfe-commits at lists.llvm.org
Mon Aug 10 03:03:40 PDT 2020


chill added a comment.

In D80791#2196598 <https://reviews.llvm.org/D80791#2196598>, @nsz wrote:

> the assumption is that the intended branch protection is implied via cmdline flags for the tu and function attributes are only used in source code for some hack.

I don't share this assumption. I find it just as valid to control the PAC/BTI with things like:

  #ifdef ENABLE_BTI
  #define BTI_FUNC __attribute__((target("branch-protection=bti")))
  #else
  #define BTI_FUNC
  
  BTI_FUNC void foo() { ...
  BTI_FUNC int bar() { ...

without using any command-line option other than `-DENABLE_BTI=1`.


CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D80791/new/

https://reviews.llvm.org/D80791



More information about the cfe-commits mailing list