[PATCH] D106622: [BPF] support btf_tag attribute in .BTF section
Yonghong Song via Phabricator via llvm-commits
llvm-commits at lists.llvm.org
Thu Jul 22 17:39:29 PDT 2021
yonghong-song created this revision.
yonghong-song added reviewers: ast, anakryiko.
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A new kind BTF_KIND_TAG is added to .BTF to encode
btf_tag attributes. The format looks like
CommonType.name : attribute string
CommonType.type : attached to a struct/union/func/func_proto/var.
CommonType.info : encoding BTF_KIND_TAG
kflag bit to indicate the attribute is
for CommonType.type, or for struct/union member
or func_proto argument.
one uint32_t : to encode which member/argument starting from 0.
If one particular type or member/argument has more than one attribute,
multiple BTF_KIND_TAG will be generated.
Repository:
rG LLVM Github Monorepo
https://reviews.llvm.org/D106622
Files:
llvm/lib/Target/BPF/BTF.def
llvm/lib/Target/BPF/BTF.h
llvm/lib/Target/BPF/BTFDebug.cpp
llvm/lib/Target/BPF/BTFDebug.h
llvm/test/CodeGen/BPF/BTF/tag-1.ll
llvm/test/CodeGen/BPF/BTF/tag-2.ll
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