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libbpf: Expose BTF-to-C type declaration emitting API

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Expose API that allows to emit type declaration and field/variable definition
(if optional field name is specified) in valid C syntax for any provided BTF
type. This is going to be used by bpftool when emitting data section layout as
a struct. As part of making this API useful in a stand-alone fashion, move
initialization of some of the internal btf_dump state to earlier phase.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Martin KaFai Lau <kafai@fb.com>
Link: https://lore.kernel.org/bpf/20191214014341.3442258-8-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2019-12-13 17:43:31 -08:00
committed by Andrii Nakryiko
parent 600ba1c5e1
commit 5ec0ba6530
3 changed files with 65 additions and 26 deletions
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src/libbpf.map
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@@ -211,6 +211,7 @@ LIBBPF_0.0.6 {
LIBBPF_0.0.7 {
global:
btf_dump__emit_type_decl;
bpf_program__attach;
btf__align_of;
} LIBBPF_0.0.6;