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libbpf: add __arg_xxx macros for annotating global func args

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Add a set of __arg_xxx macros which can be used to augment BPF global
subprogs/functions with extra information for use by BPF verifier.

Acked-by: Eduard Zingerman <eddyz87@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/r/20231215011334.2307144-9-andrii@kernel.org
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
This commit is contained in:
Andrii Nakryiko
2023-12-14 17:13:32 -08:00
committed by Andrii Nakryiko
parent c65b319c04
commit c378eff58c
1 changed files with 3 additions and 0 deletions
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3
src/bpf_helpers.h
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@@ -188,6 +188,9 @@ enum libbpf_tristate {
!!sym; \
})
#define __arg_ctx __attribute__((btf_decl_tag("arg:ctx")))
#define __arg_nonnull __attribute((btf_decl_tag("arg:nonnull")))
#ifndef ___bpf_concat
#define ___bpf_concat(a, b) a ## b
#endif