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libbpf: Fix output .symtab byte-order during linking

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BugLink: https://bugs.launchpad.net/bugs/2101915

[ 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: faf6ed321c ("libbpf: Add BPF static linker APIs")
Signed-off-by: Tony Ambardar <tony.ambardar@gmail.com>
Signed-off-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/87868bfeccf3f51aec61260073f8778e9077050a.1726475448.git.tony.ambardar@gmail.com
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Sasha Levin <sashal@kernel.org>
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Stefan Bader <stefan.bader@canonical.com>
This commit is contained in:
Tony Ambardar
2025-03-11 08:51:19 +09:00
committed by Stefan Bader
parent b191f1ec8c
commit aac3a5ab62
1 changed files with 2 additions and 0 deletions
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tools/lib/bpf/linker.c
+2
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@@ -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)