Add support for enum64. For 64-bit enumerator value,
previously, the value is truncated into 32bit, e.g.,
for the following enum in linux uapi bpf.h,
enum {
BPF_F_INDEX_MASK = 0xffffffffULL,
BPF_F_CURRENT_CPU = BPF_F_INDEX_MASK,
/* BPF_FUNC_perf_event_output for sk_buff input context. */
BPF_F_CTXLEN_MASK = (0xfffffULL << 32),
};
BPF_F_CTXLEN_MASK will be encoded with 0 with BTF_KIND_ENUM
after pahole dwarf-to-btf conversion.
With this patch, the BPF_F_CTXLEN_MASK will be encoded properly
with BTF_KIND_ENUM64.
This patch is on top of tmp.master since tmp.master has not
been sync'ed with master branch yet.
Changelogs:
v1 -> v2:
- Add flag --skip_encoding_btf_enum64 to disable newly-added functionality.
Yonghong Song (2):
libbpf: Sync with latest libbpf repo
btf: Support BTF_KIND_ENUM64
btf_encoder.c | 65 +++++++++++++++++++++++++++++++++++------------
btf_encoder.h | 2 +-
dwarf_loader.c | 12 +++++++++
dwarves.h | 4 ++-
dwarves_fprintf.c | 6 ++++-
lib/bpf | 2 +-
pahole.c | 10 +++++++-
7 files changed, 80 insertions(+), 21 deletions(-)
--
2.30.2
