Older versions of libelf cannot recognize the compressed section.
However, it's only required to fix the compressed section info when
compiling with CONFIG_DEBUG_INFO_COMPRESSED flag is set.
Only compile the compressed_section_fix function when necessary will make
it easier to enable the BTF function. Since the tool resolve_btfids is
compiled with host toolchain. The host toolchain might be older than the
cross compile toolchain.
Cc: stable@xxxxxxxxxxxxxxx
Signed-off-by: Kun-Chuan Hsieh <jetswayss@xxxxxxxxx>
---
tools/bpf/resolve_btfids/main.c | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/tools/bpf/resolve_btfids/main.c b/tools/bpf/resolve_btfids/main.c
index 7409d7860aa6..ad40346c6631 100644
--- a/tools/bpf/resolve_btfids/main.c
+++ b/tools/bpf/resolve_btfids/main.c
@@ -260,6 +260,7 @@ static struct btf_id *add_symbol(struct rb_root *root, char *name, size_t size)
return btf_id__add(root, id, false);
}
+#ifdef CONFIG_DEBUG_INFO_COMPRESSED
/*
* The data of compressed section should be aligned to 4
* (for 32bit) or 8 (for 64 bit) bytes. The binutils ld
@@ -292,6 +293,7 @@ static int compressed_section_fix(Elf *elf, Elf_Scn *scn, GElf_Shdr *sh)
}
return 0;
}
+#endif
static int elf_collect(struct object *obj)
{
@@ -370,8 +372,10 @@ static int elf_collect(struct object *obj)
obj->efile.idlist_addr = sh.sh_addr;
}
+#ifdef CONFIG_DEBUG_INFO_COMPRESSED
if (compressed_section_fix(elf, scn, &sh))
return -1;
+#endif
}
return 0;
--
2.25.1
