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8505e8709b
Complete multi-prog sections and multi sub-prog support in libbpf by properly adjusting .BTF.ext's line and function information. Mark exposed btf_ext__reloc_func_info() and btf_ext__reloc_func_info() APIs as deprecated. These APIs have simplistic assumption that all sub-programs are going to be appended to all main BPF programs, which doesn't hold in real life. It's unlikely there are any users of this API, as it's very libbpf internals-specific. Signed-off-by: Andrii Nakryiko <andriin@fb.com> Signed-off-by: Alexei Starovoitov <ast@kernel.org> Link: https://lore.kernel.org/bpf/20200903203542.15944-6-andriin@fb.com
42 lines
1.4 KiB
C
42 lines
1.4 KiB
C
/* SPDX-License-Identifier: (LGPL-2.1 OR BSD-2-Clause) */
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/*
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* Common user-facing libbpf helpers.
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*
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* Copyright (c) 2019 Facebook
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*/
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#ifndef __LIBBPF_LIBBPF_COMMON_H
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#define __LIBBPF_LIBBPF_COMMON_H
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#include <string.h>
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#ifndef LIBBPF_API
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#define LIBBPF_API __attribute__((visibility("default")))
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#endif
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#define LIBBPF_DEPRECATED(msg) __attribute__((deprecated(msg)))
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/* Helper macro to declare and initialize libbpf options struct
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*
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* This dance with uninitialized declaration, followed by memset to zero,
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* followed by assignment using compound literal syntax is done to preserve
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* ability to use a nice struct field initialization syntax and **hopefully**
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* have all the padding bytes initialized to zero. It's not guaranteed though,
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* when copying literal, that compiler won't copy garbage in literal's padding
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* bytes, but that's the best way I've found and it seems to work in practice.
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*
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* Macro declares opts struct of given type and name, zero-initializes,
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* including any extra padding, it with memset() and then assigns initial
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* values provided by users in struct initializer-syntax as varargs.
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*/
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#define DECLARE_LIBBPF_OPTS(TYPE, NAME, ...) \
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struct TYPE NAME = ({ \
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memset(&NAME, 0, sizeof(struct TYPE)); \
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(struct TYPE) { \
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.sz = sizeof(struct TYPE), \
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__VA_ARGS__ \
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}; \
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})
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#endif /* __LIBBPF_LIBBPF_COMMON_H */
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