Commit f896b4a5 authored by Tony Ambardar's avatar Tony Ambardar Committed by Alexei Starovoitov
Browse files

libbpf: Fix output .symtab byte-order during linking 



Object linking output data uses the default ELF_T_BYTE type for '.symtab'
section data, which disables any libelf-based translation. Explicitly set
the ELF_T_SYM type for output to restore libelf's byte-order conversion,
noting that input '.symtab' data is already correctly translated.

Fixes: faf6ed32 ("libbpf: Add BPF static linker APIs")
Signed-off-by: default avatarTony Ambardar <tony.ambardar@gmail.com>
Signed-off-by: default avatarAndrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/87868bfeccf3f51aec61260073f8778e9077050a.1726475448.git.tony.ambardar@gmail.com


Signed-off-by: default avatarAlexei Starovoitov <ast@kernel.org>
parent 769ad3a6

tools/lib/bpf/linker.c

+2 −0
Original line number Diff line number Diff line
@@ -396,6 +396,8 @@ static int init_output_elf(struct bpf_linker *linker, const char *file) 
		pr_warn_elf("failed to create SYMTAB data");

		return -EINVAL;

	}

	/* Ensure libelf translates byte-order of symbol records */

	sec->data->d_type = ELF_T_SYM;



	str_off = strset__add_str(linker->strtab_strs, sec->sec_name);

	if (str_off < 0)