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author | Alexei Starovoitov <ast@kernel.org> | 2019-11-14 10:57:08 -0800 |
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committer | Daniel Borkmann <daniel@iogearbox.net> | 2019-11-15 23:43:01 +0100 |
commit | faeb2dce084aff92d466c6ce68481989b815435b (patch) | |
tree | f9ee80180d03b1ebfb48142df6290336516da5d9 /net/bpf/test_run.c | |
parent | e41074d39d71aa62a6ec557af09cd42ca0928e05 (diff) | |
download | linux-stable-faeb2dce084aff92d466c6ce68481989b815435b.tar.gz linux-stable-faeb2dce084aff92d466c6ce68481989b815435b.tar.bz2 linux-stable-faeb2dce084aff92d466c6ce68481989b815435b.zip |
bpf: Add kernel test functions for fentry testing
Add few kernel functions with various number of arguments,
their types and sizes for BPF trampoline testing to cover
different calling conventions.
Signed-off-by: Alexei Starovoitov <ast@kernel.org>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
Acked-by: Song Liu <songliubraving@fb.com>
Link: https://lore.kernel.org/bpf/20191114185720.1641606-9-ast@kernel.org
Diffstat (limited to 'net/bpf/test_run.c')
-rw-r--r-- | net/bpf/test_run.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/net/bpf/test_run.c b/net/bpf/test_run.c index 0be4497cb832..62933279fbba 100644 --- a/net/bpf/test_run.c +++ b/net/bpf/test_run.c @@ -105,6 +105,40 @@ out: return err; } +/* Integer types of various sizes and pointer combinations cover variety of + * architecture dependent calling conventions. 7+ can be supported in the + * future. + */ +int noinline bpf_fentry_test1(int a) +{ + return a + 1; +} + +int noinline bpf_fentry_test2(int a, u64 b) +{ + return a + b; +} + +int noinline bpf_fentry_test3(char a, int b, u64 c) +{ + return a + b + c; +} + +int noinline bpf_fentry_test4(void *a, char b, int c, u64 d) +{ + return (long)a + b + c + d; +} + +int noinline bpf_fentry_test5(u64 a, void *b, short c, int d, u64 e) +{ + return a + (long)b + c + d + e; +} + +int noinline bpf_fentry_test6(u64 a, void *b, short c, int d, void *e, u64 f) +{ + return a + (long)b + c + d + (long)e + f; +} + static void *bpf_test_init(const union bpf_attr *kattr, u32 size, u32 headroom, u32 tailroom) { @@ -122,6 +156,13 @@ static void *bpf_test_init(const union bpf_attr *kattr, u32 size, kfree(data); return ERR_PTR(-EFAULT); } + if (bpf_fentry_test1(1) != 2 || + bpf_fentry_test2(2, 3) != 5 || + bpf_fentry_test3(4, 5, 6) != 15 || + bpf_fentry_test4((void *)7, 8, 9, 10) != 34 || + bpf_fentry_test5(11, (void *)12, 13, 14, 15) != 65 || + bpf_fentry_test6(16, (void *)17, 18, 19, (void *)20, 21) != 111) + return ERR_PTR(-EFAULT); return data; } |