[PATCH bpf-next v3 0/4] btf_encoder: emit type tags for bpf_arena pointers

Ihor Solodrai
2025-02-19T21:05:38Z

This patch series implements emitting appropriate BTF type tags for
argument and return types of kfuncs marked with KF_ARENA_* flags.

For additional context see the description of BPF patch
"bpf: define KF_ARENA_* flags for bpf_arena kfuncs" [1].

The feature depends on recent changes in libbpf [2].

[1] https://lore.kernel.org/bpf/20250206003148.2308659-1-ihor.solodrai@linux.dev/
[2] https://lore.kernel.org/bpf/20250130201239.1429648-1-ihor.solodrai@linux.dev/

v2->v3:
* Nits in patch #1

v1->v2:
* Rewrite patch #1 refactoring btf_encoder__tag_kfuncs(): now the
post-processing step is removed entirely, and kfuncs are tagged in
btf_encoder__add_func().
* Nits and renames in patch #2
* Add patch #4 editing man pages

v2: https://lore.kernel.org/dwarves/20250212201552.1431219-1-ihor.solodrai@linux.dev/
v1: https://lore.kernel.org/dwarves/20250207021442.155703-1-ihor.solodrai@linux.dev/

Ihor Solodrai (4):
btf_encoder: refactor btf_encoder__tag_kfuncs()
btf_encoder: emit type tags for bpf_arena pointers
pahole: introduce --btf_feature=attributes
man-pages: describe attributes and remove reproducible_build

btf_encoder.c | 279 +++++++++++++++++++++++----------------------
dwarves.h | 1 +
man-pages/pahole.1 | 7 +-
pahole.c | 11 ++
4 files changed, 158 insertions(+), 140 deletions(-)

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2.48.1