[llvm-bugs] [Bug 43912] implement -fpatchable-function-entry

[via llvm-bugs]

https://bugs.llvm.org/show_bug.cgi?id=43912

Fangrui Song <i at maskray.me> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |i at maskray.me
         Resolution|---                         |FIXED
             Status|NEW                         |RESOLVED

--- Comment #4 from Fangrui Song <i at maskray.me> ---
https://reviews.llvm.org/D72222
https://reviews.llvm.org/D72221
https://reviews.llvm.org/D72220
https://reviews.llvm.org/D72215

have all been committed. -fpatchable-function-entry=N[,M], M!=0 is not
supported.

Its interaction with Branch Target Identification is still unclear. We need a
consensus with GCC/Linux folks
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=92424

There are several issues with GCC's implementation
https://gcc.gnu.org/ml/gcc/2020-01/msg00067.html It also requires GNU as and ld
features.

Mark this as fixed for now. We can create a new specific bug when these issues
are sorted out.

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