From: Alexei Starovoitov <ast@kernel.org>
To: <davem@davemloft.net>
Cc: <daniel@iogearbox.net>, <peterz@infradead.org>,
<rostedt@goodmis.org>, <x86@kernel.org>, <netdev@vger.kernel.org>,
<bpf@vger.kernel.org>, <kernel-team@fb.com>
Subject: [PATCH bpf-next 6/7] bpf: Add kernel test functions for fentry testing
Date: Sat, 2 Nov 2019 15:00:24 -0700 [thread overview]
Message-ID: <20191102220025.2475981-7-ast@kernel.org> (raw)
In-Reply-To: <20191102220025.2475981-1-ast@kernel.org>
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>
---
net/bpf/test_run.c | 41 +++++++++++++++++++++++++++++++++++++++++
1 file changed, 41 insertions(+)
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 @@ static int bpf_test_finish(const union bpf_attr *kattr,
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;
}
--
2.23.0
next prev parent reply other threads:[~2019-11-02 22:00 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-11-02 22:00 [PATCH bpf-next 0/7] Introduce BPF trampoline Alexei Starovoitov
2019-11-02 22:00 ` [PATCH bpf-next 1/7] bpf, ftrace: temporary workaround Alexei Starovoitov
2019-11-02 22:00 ` [PATCH bpf-next 2/7] bpf: refactor x86 JIT into helpers Alexei Starovoitov
2019-11-02 22:00 ` [PATCH bpf-next 3/7] bpf: Introduce BPF trampoline Alexei Starovoitov
2019-11-05 19:51 ` Andrii Nakryiko
2019-11-02 22:00 ` [PATCH bpf-next 4/7] libbpf: Add support to attach to fentry/fexit tracing progs Alexei Starovoitov
2019-11-05 21:17 ` Andrii Nakryiko
2019-11-05 23:17 ` Alexei Starovoitov
2019-11-02 22:00 ` [PATCH bpf-next 5/7] selftest/bpf: Simple test for fentry/fexit Alexei Starovoitov
2019-11-05 21:37 ` Andrii Nakryiko
2019-11-02 22:00 ` Alexei Starovoitov [this message]
2019-11-02 22:00 ` [PATCH bpf-next 7/7] selftests/bpf: Add test for BPF trampoline Alexei Starovoitov
2019-11-05 21:50 ` Andrii Nakryiko
2019-11-05 14:31 ` [PATCH bpf-next 0/7] Introduce " Alexei Starovoitov
2019-11-05 15:40 ` Steven Rostedt
2019-11-05 15:47 ` Alexei Starovoitov
2019-11-05 16:00 ` Steven Rostedt
2019-11-05 16:28 ` Alexei Starovoitov
2019-11-05 17:26 ` Steven Rostedt
2019-11-05 17:59 ` Alexei Starovoitov
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