This patchset introduces a set of new APIs that make it possible to work with BTF more effectively (and without involving kernel) for applications like pahole that need to manipulate .BTF and .BTF.ext data.
Patch #1 changes existing btf__new() API call to only load and initialize struct btf, while exposing new btf__load() API to attempt to load and validate BTF in kernel. Patch #2 adds btf__get_raw_data() API allowing to get access to raw BTF data from struct btf. Patch #3 adds similar btf_ext__get_raw_data() API for working with struct btf_ext. Patch #4 removes not-yet-stable btf__get_strings() API which was added to be able to test contents of struct btf for btf__dedup(). It's now superseded by raw APIs. v2->v3: - const void* variants of btf__get_raw_data() - added btf_ext__get_raw_data() - removed btf__get_strings() and adapated test_btf.c to use btf__get_raw_data() v1->v2: - btf_load() returns just error, not fd - fix ordering in libbpf.map Andrii Nakryiko (4): btf: separate btf creation and loading btf: expose API to work with raw btf data btf: expose API to work with raw btf_ext data tools/bpf: remove btf__get_strings superseded() by raw data API tools/lib/bpf/btf.c | 145 +++++++++++++------------ tools/lib/bpf/btf.h | 6 +- tools/lib/bpf/libbpf.c | 2 +- tools/lib/bpf/libbpf.map | 3 + tools/testing/selftests/bpf/test_btf.c | 39 ++++--- 5 files changed, 110 insertions(+), 85 deletions(-) -- 2.17.1
