Now that btf_parse_elf() handles .BTF.base section presence,
we need to ensure that resolve_btfids uses .BTF.base when present
rather than the vmlinux base BTF passed in via the -B option.
Detect .BTF.base section presence and unset the base BTF path
to ensure that BTF ELF parsing will do the right thing.
Signed-off-by: Alan Maguire <alan.maguire@xxxxxxxxxx>
---
tools/bpf/resolve_btfids/main.c | 8 ++++++++
1 file changed, 8 insertions(+)
diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c
index af393c7dee1f..936ef95c3d32 100644
--- a/tools/bpf/resolve_btfids/main.c
+++ b/tools/bpf/resolve_btfids/main.c
@@ -409,6 +409,14 @@ static int elf_collect(struct object *obj)
obj->efile.idlist = data;
obj->efile.idlist_shndx = idx;
obj->efile.idlist_addr = sh.sh_addr;
+ } else if (!strcmp(name, BTF_BASE_ELF_SEC)) {
+ /* If a .BTF.base section is found, do not resolve
+ * BTF ids relative to vmlinux; resolve relative
+ * to the .BTF.base section instead. btf__parse_split()
+ * will take care of this once the base BTF it is
+ * passed is NULL.
+ */
+ obj->base_btf_path = NULL;
}
if (compressed_section_fix(elf, scn, &sh))
--
2.31.1
