From: Yonghong Song <yhs@fb.com>
To: <bpf@vger.kernel.org>
Cc: Alexei Starovoitov <ast@kernel.org>,
Andrii Nakryiko <andrii@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>, <kernel-team@fb.com>
Subject: [PATCH bpf-next v2 1/6] bpf: Add struct argument info in btf_func_model
Date: Thu, 11 Aug 2022 22:24:24 -0700 [thread overview]
Message-ID: <20220812052424.521379-1-yhs@fb.com> (raw)
In-Reply-To: <20220812052419.520522-1-yhs@fb.com>
Add arg_flags for additional information about arguments in btf_func_model.
Currently, only whether an argument is a structure or not is recorded.
Such information will be used in arch specific function
arch_prepare_bpf_trampoline() to prepare argument access properly
in trampoline.
Signed-off-by: Yonghong Song <yhs@fb.com>
---
include/linux/bpf.h | 4 ++++
1 file changed, 4 insertions(+)
diff --git a/include/linux/bpf.h b/include/linux/bpf.h
index a627a02cf8ab..2d3099fb5a0a 100644
--- a/include/linux/bpf.h
+++ b/include/linux/bpf.h
@@ -726,10 +726,14 @@ enum bpf_cgroup_storage_type {
*/
#define MAX_BPF_FUNC_REG_ARGS 5
+/* The argument is a structure. */
+#define BTF_FMODEL_STRUCT_ARG BIT(0)
+
struct btf_func_model {
u8 ret_size;
u8 nr_args;
u8 arg_size[MAX_BPF_FUNC_ARGS];
+ u8 arg_flags[MAX_BPF_FUNC_ARGS];
};
/* Restore arguments before returning from trampoline to let original function
--
2.30.2
next prev parent reply other threads:[~2022-08-12 5:24 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-12 5:24 [PATCH bpf-next v2 0/6] bpf: Support struct argument for trampoline base progs Yonghong Song
2022-08-12 5:24 ` Yonghong Song [this message]
2022-08-12 5:24 ` [PATCH bpf-next v2 2/6] bpf: x86: Rename stack_size to regs_off in {save,restore}_regs() Yonghong Song
2022-08-12 5:24 ` [PATCH bpf-next v2 3/6] bpf: x86: Support in-register struct arguments Yonghong Song
2022-08-14 20:24 ` Jiri Olsa
2022-08-15 5:29 ` Yonghong Song
2022-08-15 7:29 ` Jiri Olsa
2022-08-15 15:25 ` Yonghong Song
2022-08-15 22:44 ` Alexei Starovoitov
2022-08-18 4:56 ` Yonghong Song
2022-08-18 20:44 ` Alexei Starovoitov
2022-08-24 19:04 ` Yonghong Song
2022-08-24 22:35 ` Alexei Starovoitov
2022-08-25 4:10 ` Yonghong Song
2022-08-24 19:05 ` Andrii Nakryiko
2022-08-25 4:04 ` Yonghong Song
2022-08-12 5:24 ` [PATCH bpf-next v2 4/6] bpf: arm64: No support of struct argument Yonghong Song
2022-08-12 5:24 ` [PATCH bpf-next v2 5/6] bpf: Populate struct argument info in btf_func_model Yonghong Song
2022-08-12 5:24 ` [PATCH bpf-next v2 6/6] selftests/bpf: Add struct argument tests with fentry/fexit programs Yonghong Song
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