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libbpf: Clean up and improve CO-RE reloc logging

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Add logging of local/target type kind (struct/union/typedef/etc). Preserve
unresolved root type ID (for cases of typedef). Improve the format of CO-RE
reloc spec output format to contain only relevant and succinct info.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Link: https://lore.kernel.org/bpf/20200818223921.2911963-3-andriin@fb.com
This commit is contained in:
Andrii Nakryiko
2020-08-18 15:39:14 -07:00
committed by Alexei Starovoitov
parent 81ba088902
commit 28b93c6449
4 changed files with 169 additions and 129 deletions
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17
tools/lib/bpf/btf.c
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@@ -1131,14 +1131,14 @@ static int btf_ext_setup_line_info(struct btf_ext *btf_ext)
return btf_ext_setup_info(btf_ext, &param);
}
static int btf_ext_setup_field_reloc(struct btf_ext *btf_ext)
static int btf_ext_setup_core_relos(struct btf_ext *btf_ext)
{
struct btf_ext_sec_setup_param param = {
.off = btf_ext->hdr->field_reloc_off,
.len = btf_ext->hdr->field_reloc_len,
.min_rec_size = sizeof(struct bpf_field_reloc),
.ext_info = &btf_ext->field_reloc_info,
.desc = "field_reloc",
.off = btf_ext->hdr->core_relo_off,
.len = btf_ext->hdr->core_relo_len,
.min_rec_size = sizeof(struct bpf_core_relo),
.ext_info = &btf_ext->core_relo_info,
.desc = "core_relo",
};
return btf_ext_setup_info(btf_ext, &param);
@@ -1217,10 +1217,9 @@ struct btf_ext *btf_ext__new(__u8 *data, __u32 size)
if (err)
goto done;
if (btf_ext->hdr->hdr_len <
offsetofend(struct btf_ext_header, field_reloc_len))
if (btf_ext->hdr->hdr_len < offsetofend(struct btf_ext_header, core_relo_len))
goto done;
err = btf_ext_setup_field_reloc(btf_ext);
err = btf_ext_setup_core_relos(btf_ext);
if (err)
goto done;