Fangrui Song 1560a00032 [yaml2obj/obj2yaml/llvm-readobj] Support SHF_GNU_RETAIN ...

In binutils, the flag is defined for ELFOSABI_GNU and ELFOSABI_FREEBSD.
It can be used to mark a section as a GC root.

In practice, the flag has generic semantics and can be applied to many
EI_OSABI values, so we consider it generic.

Differential Revision: https://reviews.llvm.org/D95728

2021-02-02 09:19:53 -08:00

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