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libbpf: Assume unsigned values for BTF_KIND_ENUM

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Currently, BTF_KIND_ENUM type doesn't record whether enum values should be
interpreted as signed or unsigned. In Linux, most enums are unsigned, though,
so interpreting them as unsigned matches real world better.

Change btf_dump test case to test maximum 32-bit value, instead of negative
value.

Signed-off-by: Andrii Nakryiko <andriin@fb.com>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Link: https://lore.kernel.org/bpf/20200303003233.3496043-3-andriin@fb.com
This commit is contained in:
Andrii Nakryiko authored and Andrii Nakryiko committed 2020-03-12 22:57:51 -07:00
1 parent 26cbe2384c
commit 483a8c238f
1 file changed
+4 -4
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src/btf_dump.c
+4 -4
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@@ -916,13 +916,13 @@ static void btf_dump_emit_enum_def(struct btf_dump *d, __u32 id,
/* enumerators share namespace with typedef idents */
dup_cnt = btf_dump_name_dups(d, d->ident_names, name);
if (dup_cnt > 1) {
btf_dump_printf(d, "\n%s%s___%zu = %d,",
btf_dump_printf(d, "\n%s%s___%zu = %u,",
pfx(lvl + 1), name, dup_cnt,
(__s32)v->val);
(__u32)v->val);
} else {
btf_dump_printf(d, "\n%s%s = %d,",
btf_dump_printf(d, "\n%s%s = %u,",
pfx(lvl + 1), name,
(__s32)v->val);
(__u32)v->val);
}
}
btf_dump_printf(d, "\n%s}", pfx(lvl));