Merge branch 'bpf: add support for BTF_KIND_DECL_TAG typedef'

Browse source

Yonghong Song says:

====================

Latest upstream llvm-project added support for btf_decl_tag attributes
for typedef declarations ([1], [2]). Similar to other btf_decl_tag cases,
func/func_param/global_var/struct/union/field, btf_decl_tag with typedef
declaration can carry information from kernel source to clang compiler
and then to dwarf/BTF, for bpf verification or other use cases.

This patch set added kernel support for BTF_KIND_DECL_TAG to typedef
declaration (Patch 1). Additional selftests are added to cover
unit testing, dedup, or bpf program usage of btf_decl_tag with typedef.
(Patches 2, 3 and 4). The btf documentation is updated to include
BTF_KIND_DECL_TAG typedef (Patch 5).

  [1] https://reviews.llvm.org/D110127
  [2] https://reviews.llvm.org/D112259
====================

Signed-off-by: Alexei Starovoitov <ast@kernel.org>

...

This commit is contained in:

Alexei Starovoitov 2021-10-22 17:04:44 -07:00

parent a33f607f68 5a8671349d

commit 1c50884370

4 changed files with 89 additions and 13 deletions

Show all changes Ignore whitespace when comparing lines Ignore changes in amount of whitespace Ignore changes in whitespace at EOL

Download patch file Download diff file Expand all files Collapse all files

6

Documentation/bpf/btf.rst

View file

4

kernel/bpf/btf.c

View file

83

tools/testing/selftests/bpf/prog_tests/btf.c

View file

9

tools/testing/selftests/bpf/progs/tag.c

View file