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selftests/bpf: Change NAME_NTH/IS_NAME_NTH for BTF_KIND_TAG format 

BTF_KIND_TAG ELF format has a component_idx which might have value -1.
test_btf may confuse it with common_type.name as NAME_NTH checkes
high 16bit to be 0xffff. Change NAME_NTH high 16bit check to be
0xfffe so it won't confuse with component_idx.

Signed-off-by: Yonghong Song <yhs@fb.com>
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Link: https://lore.kernel.org/bpf/20210914223041.248009-1-yhs@fb.com
This commit is contained in:
Yonghong Song 2021-09-14 15:30:41 -07:00 committed by Alexei Starovoitov
parent 71d29c2d47
commit 3df3bd68d4
1 changed files with 2 additions and 2 deletions
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4
tools/testing/selftests/bpf/prog_tests/btf.c
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@ -39,8 +39,8 @@ static bool always_log;
#define BTF_END_RAW 0xdeadbeef
#define NAME_TBD 0xdeadb33f
#define NAME_NTH(N) (0xffff0000 | N)
#define IS_NAME_NTH(X) ((X & 0xffff0000) == 0xffff0000)
#define NAME_NTH(N) (0xfffe0000 | N)
#define IS_NAME_NTH(X) ((X & 0xffff0000) == 0xfffe0000)
#define GET_NAME_NTH_IDX(X) (X & 0x0000ffff)
#define MAX_NR_RAW_U32 1024