[PATCH 5.15 164/565] libbpf: Fix output .symtab byte-order during linking

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5.15-stable review patch.  If anyone has any objections, please let me know.

------------------

From: Tony Ambardar <tony.ambardar@xxxxxxxxx>

[ Upstream commit f896b4a5399e97af0b451fcf04754ed316935674 ]

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: faf6ed321cf6 ("libbpf: Add BPF static linker APIs")
Signed-off-by: Tony Ambardar <tony.ambardar@xxxxxxxxx>
Signed-off-by: Andrii Nakryiko <andrii@xxxxxxxxxx>
Link: https://lore.kernel.org/bpf/87868bfeccf3f51aec61260073f8778e9077050a.1726475448.git.tony.ambardar@xxxxxxxxx
Signed-off-by: Alexei Starovoitov <ast@xxxxxxxxxx>
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
---
 tools/lib/bpf/linker.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/tools/lib/bpf/linker.c b/tools/lib/bpf/linker.c
index bfe0c30841b9b..8907d4238818c 100644
--- a/tools/lib/bpf/linker.c
+++ b/tools/lib/bpf/linker.c
@@ -397,6 +397,8 @@ 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)
-- 
2.43.0







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