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libbpf: Support BTF_KIND_TYPE_TAG

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Add libbpf support for BTF_KIND_TYPE_TAG.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20211112012614.1505315-1-yhs@fb.com
This commit is contained in:
Yonghong Song
2021-11-11 17:26:14 -08:00
committed by Andrii Nakryiko
parent d932a1a46b
commit 98181e0546
6 changed files with 73 additions and 2 deletions
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src/libbpf_internal.h
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@@ -73,6 +73,8 @@
BTF_TYPE_ENC(name, BTF_INFO_ENC(BTF_KIND_FLOAT, 0, 0), sz)
#define BTF_TYPE_DECL_TAG_ENC(value, type, component_idx) \
BTF_TYPE_ENC(value, BTF_INFO_ENC(BTF_KIND_DECL_TAG, 0, 0), type), (component_idx)
#define BTF_TYPE_TYPE_TAG_ENC(value, type) \
BTF_TYPE_ENC(value, BTF_INFO_ENC(BTF_KIND_TYPE_TAG, 0, 0), type)
#ifndef likely
#define likely(x) __builtin_expect(!!(x), 1)