diff mbox series

[bpf-next,v6,3/8] libbpf: Fix output .symtab byte-order during linking

Message ID 87868bfeccf3f51aec61260073f8778e9077050a.1726475448.git.tony.ambardar@gmail.com (mailing list archive)
State Accepted
Commit a91c9b9697ff50c52f305c87d0faa0f8041dda2c
Delegated to: BPF
Headers show
Series libbpf, selftests/bpf: Support cross-endian usage | expand

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netdev/series_format success Posting correctly formatted
netdev/tree_selection success Clearly marked for bpf-next, async
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netdev/fixes_present success Fixes tag not required for -next series
netdev/header_inline success No static functions without inline keyword in header files
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Commit Message

Tony Ambardar Sept. 16, 2024, 8:37 a.m. UTC 
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@gmail.com>
---
 tools/lib/bpf/linker.c | 2 ++
 1 file changed, 2 insertions(+)
diff mbox series

Patch

diff --git a/tools/lib/bpf/linker.c b/tools/lib/bpf/linker.c
index e0005c6ade88..6985ab0f1ca9 100644
--- a/tools/lib/bpf/linker.c
+++ b/tools/lib/bpf/linker.c
@@ -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)