https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109558
Bug ID: 109558
Summary: bpf: support BTF and DWARF tag annotations for BPF
Product: gcc
Version: unknown
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: jemarch at gcc dot gnu.org
Target Milestone: ---
There is a need to support:
- Two new C-language-level attributes that allow to associate (to "tag")
particular declarations and types with arbitrary strings. This is intended to
be used to, for example, characterize certain pointer types in the kernel
verifier.
- The conveyance of that information in the DWARF output in the form of a new
DIE: DW_TAG_(GNU|LLVM)_annotation.
- The conveyance of that information in the BTF output in the form of two new
kinds of BTF objects: BTF_KIND_DECL_TAG and BTF_KIND_TYPE_TAG.
All of these facilities are being added to the eBPF ecosystem, and support for
them exists in some form in LLVM. We have already discussed and agred on the
details of what to support.
