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Message-ID: <20250902143504.1224726-1-jolsa@kernel.org>
Date: Tue, 2 Sep 2025 16:34:53 +0200
From: Jiri Olsa <jolsa@...nel.org>
To: Oleg Nesterov <oleg@...hat.com>,
Masami Hiramatsu <mhiramat@...nel.org>,
Peter Zijlstra <peterz@...radead.org>,
Andrii Nakryiko <andrii@...nel.org>
Cc: bpf@...r.kernel.org,
linux-kernel@...r.kernel.org,
linux-trace-kernel@...r.kernel.org,
x86@...nel.org,
Song Liu <songliubraving@...com>,
Yonghong Song <yhs@...com>,
John Fastabend <john.fastabend@...il.com>,
Hao Luo <haoluo@...gle.com>,
Steven Rostedt <rostedt@...dmis.org>,
Ingo Molnar <mingo@...nel.org>
Subject: [PATCH perf/core 00/11] uprobes: Add unique uprobe
hi,
this patchset adds unique uprobe and support to change userspace
task's registers from within bpf uprobe program.
We recently had several requests for tetragon to be able to change
user application function return value or divert its execution through
instruction pointer change.
v1 changes (from rfc [1]):
- added unique probe support
- added more tests
thanks,
jirka
[1] https://lore.kernel.org/bpf/20250801210238.2207429-1-jolsa@kernel.org/
---
Jiri Olsa (11):
uprobes: Add unique flag to uprobe consumer
uprobes: Skip emulate/sstep on unique uprobe when ip is changed
perf: Add support to attach standard unique uprobe
bpf: Add support to attach uprobe_multi unique uprobe
bpf: Allow uprobe program to change context registers
libbpf: Add support to attach unique uprobe_multi uprobe
libbpf: Add support to attach generic unique uprobe
selftests/bpf: Add uprobe multi context registers changes test
selftests/bpf: Add uprobe multi context ip register change test
selftests/bpf: Add uprobe multi unique attach test
selftests/bpf: Add uprobe unique attach test
include/linux/bpf.h | 1 +
include/linux/trace_events.h | 2 +-
include/linux/uprobes.h | 1 +
include/uapi/linux/bpf.h | 3 +-
kernel/events/core.c | 12 ++++-
kernel/events/uprobes.c | 43 ++++++++++++++--
kernel/trace/bpf_trace.c | 7 +--
kernel/trace/trace_event_perf.c | 4 +-
kernel/trace/trace_probe.h | 2 +-
kernel/trace/trace_uprobe.c | 9 ++--
tools/include/uapi/linux/bpf.h | 3 +-
tools/lib/bpf/libbpf.c | 36 +++++++++++---
tools/lib/bpf/libbpf.h | 8 ++-
tools/testing/selftests/bpf/prog_tests/bpf_cookie.c | 1 +
tools/testing/selftests/bpf/prog_tests/uprobe.c | 111 ++++++++++++++++++++++++++++++++++++++++-
tools/testing/selftests/bpf/prog_tests/uprobe_multi_test.c | 248 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++
tools/testing/selftests/bpf/progs/uprobe_multi.c | 38 ++++++++++++++
tools/testing/selftests/bpf/progs/uprobe_multi_unique.c | 34 +++++++++++++
18 files changed, 534 insertions(+), 29 deletions(-)
create mode 100644 tools/testing/selftests/bpf/progs/uprobe_multi_unique.c
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