Older verions 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 stable@vger.kernel.org
Signed-off-by: Kun-Chuan Hsieh jetswayss@gmail.com --- 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;