From: Jiri Olsa <jolsa@kernel.org>
To: Alexei Starovoitov <ast@kernel.org>,
Daniel Borkmann <daniel@iogearbox.net>,
Andrii Nakryiko <andrii@kernel.org>
Cc: bpf@vger.kernel.org, Martin KaFai Lau <kafai@fb.com>,
Song Liu <songliubraving@fb.com>, Yonghong Song <yhs@fb.com>,
John Fastabend <john.fastabend@gmail.com>,
KP Singh <kpsingh@chromium.org>,
Stanislav Fomichev <sdf@google.com>, Hao Luo <haoluo@google.com>
Subject: [PATCHv3 bpf-next 05/26] bpf: Add bpf_get_func_ip helper support for uprobe link
Date: Fri, 30 Jun 2023 10:33:23 +0200 [thread overview]
Message-ID: <20230630083344.984305-6-jolsa@kernel.org> (raw)
In-Reply-To: <20230630083344.984305-1-jolsa@kernel.org>
Adding support for bpf_get_func_ip helper being called from
ebpf program attached by uprobe_multi link.
It returns the ip of the uprobe.
Acked-by: Andrii Nakryiko <andrii@kernel.org>
Signed-off-by: Jiri Olsa <jolsa@kernel.org>
---
kernel/trace/bpf_trace.c | 33 ++++++++++++++++++++++++++++++---
1 file changed, 30 insertions(+), 3 deletions(-)
diff --git a/kernel/trace/bpf_trace.c b/kernel/trace/bpf_trace.c
index 4ef51fd0497f..f5a41c1604b8 100644
--- a/kernel/trace/bpf_trace.c
+++ b/kernel/trace/bpf_trace.c
@@ -88,6 +88,7 @@ static u64 bpf_kprobe_multi_cookie(struct bpf_run_ctx *ctx);
static u64 bpf_kprobe_multi_entry_ip(struct bpf_run_ctx *ctx);
static u64 bpf_uprobe_multi_cookie(struct bpf_run_ctx *ctx);
+static u64 bpf_uprobe_multi_entry_ip(struct bpf_run_ctx *ctx);
/**
* trace_call_bpf - invoke BPF program
@@ -1101,6 +1102,18 @@ static const struct bpf_func_proto bpf_get_attach_cookie_proto_kmulti = {
.arg1_type = ARG_PTR_TO_CTX,
};
+BPF_CALL_1(bpf_get_func_ip_uprobe_multi, struct pt_regs *, regs)
+{
+ return bpf_uprobe_multi_entry_ip(current->bpf_ctx);
+}
+
+static const struct bpf_func_proto bpf_get_func_ip_proto_uprobe_multi = {
+ .func = bpf_get_func_ip_uprobe_multi,
+ .gpl_only = false,
+ .ret_type = RET_INTEGER,
+ .arg1_type = ARG_PTR_TO_CTX,
+};
+
BPF_CALL_1(bpf_get_attach_cookie_uprobe_multi, struct pt_regs *, regs)
{
return bpf_uprobe_multi_cookie(current->bpf_ctx);
@@ -1555,9 +1568,11 @@ kprobe_prog_func_proto(enum bpf_func_id func_id, const struct bpf_prog *prog)
return &bpf_override_return_proto;
#endif
case BPF_FUNC_get_func_ip:
- return prog->expected_attach_type == BPF_TRACE_KPROBE_MULTI ?
- &bpf_get_func_ip_proto_kprobe_multi :
- &bpf_get_func_ip_proto_kprobe;
+ if (prog->expected_attach_type == BPF_TRACE_KPROBE_MULTI)
+ return &bpf_get_func_ip_proto_kprobe_multi;
+ if (prog->expected_attach_type == BPF_TRACE_UPROBE_MULTI)
+ return &bpf_get_func_ip_proto_uprobe_multi;
+ return &bpf_get_func_ip_proto_kprobe;
case BPF_FUNC_get_attach_cookie:
if (prog->expected_attach_type == BPF_TRACE_KPROBE_MULTI)
return &bpf_get_attach_cookie_proto_kmulti;
@@ -3067,6 +3082,14 @@ uprobe_multi_link_ret_handler(struct uprobe_consumer *con, unsigned long func, s
return uprobe_prog_run(uprobe, func, regs);
}
+static u64 bpf_uprobe_multi_entry_ip(struct bpf_run_ctx *ctx)
+{
+ struct bpf_uprobe_multi_run_ctx *run_ctx;
+
+ run_ctx = container_of(current->bpf_ctx, struct bpf_uprobe_multi_run_ctx, run_ctx);
+ return run_ctx->entry_ip;
+}
+
static u64 bpf_uprobe_multi_cookie(struct bpf_run_ctx *ctx)
{
struct bpf_uprobe_multi_run_ctx *run_ctx;
@@ -3228,4 +3251,8 @@ static u64 bpf_uprobe_multi_cookie(struct bpf_run_ctx *ctx)
{
return 0;
}
+static u64 bpf_uprobe_multi_entry_ip(struct bpf_run_ctx *ctx)
+{
+ return 0;
+}
#endif /* CONFIG_UPROBES */
--
2.41.0
next prev parent reply other threads:[~2023-06-30 8:34 UTC|newest]
Thread overview: 73+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-06-30 8:33 [PATCHv3 bpf-next 00/26] bpf: Add multi uprobe link Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 01/26] bpf: Add attach_type checks under bpf_prog_attach_check_attach_type Jiri Olsa
2023-07-06 22:34 ` Andrii Nakryiko
2023-06-30 8:33 ` [PATCHv3 bpf-next 02/26] bpf: Add multi uprobe link Jiri Olsa
2023-07-06 22:34 ` Andrii Nakryiko
2023-07-11 9:00 ` Jiri Olsa
2023-07-07 4:22 ` Andrii Nakryiko
2023-07-11 9:01 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 03/26] bpf: Add cookies support for uprobe_multi link Jiri Olsa
2023-07-01 3:40 ` Yafang Shao
2023-07-01 8:54 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 04/26] bpf: Add pid filter " Jiri Olsa
2023-06-30 8:33 ` Jiri Olsa [this message]
2023-07-06 22:29 ` [PATCHv3 bpf-next 05/26] bpf: Add bpf_get_func_ip helper support for uprobe link Andrii Nakryiko
2023-07-10 7:24 ` Jiri Olsa
2023-07-10 17:55 ` Andrii Nakryiko
2023-07-11 8:28 ` Jiri Olsa
2023-07-11 16:57 ` Andrii Nakryiko
2023-06-30 8:33 ` [PATCHv3 bpf-next 06/26] libbpf: Add uprobe_multi attach type and link names Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 07/26] libbpf: Move elf_find_func_offset* functions to elf object Jiri Olsa
2023-07-06 23:02 ` Andrii Nakryiko
2023-07-11 9:05 ` Jiri Olsa
2023-07-11 17:01 ` Andrii Nakryiko
2023-07-06 23:03 ` Andrii Nakryiko
2023-07-11 9:05 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 08/26] libbpf: Add elf_open/elf_close functions Jiri Olsa
2023-07-06 23:09 ` Andrii Nakryiko
2023-07-11 9:01 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 09/26] libbpf: Add elf symbol iterator Jiri Olsa
2023-07-06 23:24 ` Andrii Nakryiko
2023-07-11 9:03 ` Jiri Olsa
2023-07-11 16:59 ` Andrii Nakryiko
2023-06-30 8:33 ` [PATCHv3 bpf-next 10/26] libbpf: Add elf_resolve_syms_offsets function Jiri Olsa
2023-07-07 3:48 ` Andrii Nakryiko
2023-07-11 9:04 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 11/26] libbpf: Add elf_resolve_pattern_offsets function Jiri Olsa
2023-07-07 3:52 ` Andrii Nakryiko
2023-07-11 9:04 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 12/26] libbpf: Add bpf_link_create support for multi uprobes Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 13/26] libbpf: Add bpf_program__attach_uprobe_multi function Jiri Olsa
2023-07-07 4:05 ` Andrii Nakryiko
2023-07-11 9:05 ` Jiri Olsa
2023-07-11 17:02 ` Andrii Nakryiko
2023-06-30 8:33 ` [PATCHv3 bpf-next 14/26] libbpf: Add support for u[ret]probe.multi[.s] program sections Jiri Olsa
2023-07-07 4:07 ` Andrii Nakryiko
2023-06-30 8:33 ` [PATCHv3 bpf-next 15/26] libbpf: Add uprobe multi link detection Jiri Olsa
2023-07-07 4:20 ` Andrii Nakryiko
2023-07-11 9:03 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 16/26] libbpf: Add uprobe multi link support to bpf_program__attach_usdt Jiri Olsa
2023-07-07 4:29 ` Andrii Nakryiko
2023-07-11 9:04 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 17/26] selftests/bpf: Add uprobe_multi skel test Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 18/26] selftests/bpf: Add uprobe_multi api test Jiri Olsa
2023-07-07 4:32 ` Andrii Nakryiko
2023-07-11 9:06 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 19/26] selftests/bpf: Add uprobe_multi link test Jiri Olsa
2023-07-07 4:33 ` Andrii Nakryiko
2023-07-11 9:06 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 20/26] selftests/bpf: Add uprobe_multi test program Jiri Olsa
2023-07-07 4:35 ` Andrii Nakryiko
2023-06-30 8:33 ` [PATCHv3 bpf-next 21/26] selftests/bpf: Add uprobe_multi bench test Jiri Olsa
2023-07-07 4:38 ` Andrii Nakryiko
2023-07-11 9:07 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 22/26] selftests/bpf: Add usdt_multi test program Jiri Olsa
2023-07-07 4:39 ` Andrii Nakryiko
2023-06-30 8:33 ` [PATCHv3 bpf-next 23/26] selftests/bpf: Add usdt_multi bench test Jiri Olsa
2023-07-07 4:42 ` Andrii Nakryiko
2023-07-11 9:07 ` Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 24/26] selftests/bpf: Add uprobe_multi cookie test Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 25/26] selftests/bpf: Add uprobe_multi pid filter tests Jiri Olsa
2023-06-30 8:33 ` [PATCHv3 bpf-next 26/26] selftests/bpf: Add extra link to uprobe_multi tests Jiri Olsa
2023-07-05 12:45 ` [PATCHv3 bpf-next 00/26] bpf: Add multi uprobe link Daniel Borkmann
2023-07-05 19:10 ` Jiri Olsa
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