Hi, Here is the 10th version of fprobe. In this version, the rethook arm support ([7/12]) comes back :-D, add an internal rethook flag for identify the context ([3-8/12]), and simplifies the ftrace_location lookup loops([2/12]) according to Jiri's comment :) The previous version (v9) is here[1]; [1] https://lore.kernel.org/all/164655933970.1674510.3809060481512713846.stgit@devnote2/T/#u This series introduces the fprobe, the function entry/exit probe with multiple probe point support for x86, arm64 and powerpc64le. This also introduces the rethook for hooking function return as same as the kretprobe does. This abstraction will help us to generalize the fgraph tracer, because we can just switch to it from the rethook in fprobe, depending on the kernel configuration. The patch [1/10] is from Jiri's series[2]. [2] https://lore.kernel.org/all/20220104080943.113249-1-jolsa@xxxxxxxxxx/T/#u And the patch [9/10] adds the FPROBE_FL_KPROBE_SHARED flag for the case if user wants to share the same code (or share a same resource) on the fprobe and the kprobes. I forcibly updated my kprobes/fprobe branch, you can pull this series from: https://git.kernel.org/pub/scm/linux/kernel/git/mhiramat/linux.git kprobes/fprobe Thank you, --- Jiri Olsa (1): ftrace: Add ftrace_set_filter_ips function Masami Hiramatsu (11): fprobe: Add ftrace based probe APIs rethook: Add a generic return hook rethook: x86: Add rethook x86 implementation arm64: rethook: Add arm64 rethook implementation powerpc: Add rethook support ARM: rethook: Add rethook arm implementation fprobe: Add exit_handler support fprobe: Add sample program for fprobe fprobe: Introduce FPROBE_FL_KPROBE_SHARED flag for fprobe docs: fprobe: Add fprobe description to ftrace-use.rst fprobe: Add a selftest for fprobe Documentation/trace/fprobe.rst | 171 +++++++++++++ Documentation/trace/index.rst | 1 arch/arm/Kconfig | 1 arch/arm/include/asm/stacktrace.h | 4 arch/arm/kernel/stacktrace.c | 6 arch/arm/probes/Makefile | 1 arch/arm/probes/rethook.c | 101 ++++++++ arch/arm64/Kconfig | 1 arch/arm64/include/asm/stacktrace.h | 2 arch/arm64/kernel/probes/Makefile | 1 arch/arm64/kernel/probes/rethook.c | 25 ++ arch/arm64/kernel/probes/rethook_trampoline.S | 87 +++++++ arch/arm64/kernel/stacktrace.c | 7 - arch/powerpc/Kconfig | 1 arch/powerpc/kernel/Makefile | 1 arch/powerpc/kernel/rethook.c | 72 +++++ arch/x86/Kconfig | 1 arch/x86/include/asm/unwind.h | 8 + arch/x86/kernel/Makefile | 1 arch/x86/kernel/kprobes/common.h | 1 arch/x86/kernel/rethook.c | 115 +++++++++ include/linux/fprobe.h | 105 ++++++++ include/linux/ftrace.h | 3 include/linux/kprobes.h | 3 include/linux/rethook.h | 100 ++++++++ include/linux/sched.h | 3 kernel/exit.c | 2 kernel/fork.c | 3 kernel/trace/Kconfig | 26 ++ kernel/trace/Makefile | 2 kernel/trace/fprobe.c | 332 +++++++++++++++++++++++++ kernel/trace/ftrace.c | 58 ++++ kernel/trace/rethook.c | 317 ++++++++++++++++++++++++ lib/Kconfig.debug | 12 + lib/Makefile | 2 lib/test_fprobe.c | 174 +++++++++++++ samples/Kconfig | 7 + samples/Makefile | 1 samples/fprobe/Makefile | 3 samples/fprobe/fprobe_example.c | 120 +++++++++ 40 files changed, 1867 insertions(+), 14 deletions(-) create mode 100644 Documentation/trace/fprobe.rst create mode 100644 arch/arm/probes/rethook.c create mode 100644 arch/arm64/kernel/probes/rethook.c create mode 100644 arch/arm64/kernel/probes/rethook_trampoline.S create mode 100644 arch/powerpc/kernel/rethook.c create mode 100644 arch/x86/kernel/rethook.c create mode 100644 include/linux/fprobe.h create mode 100644 include/linux/rethook.h create mode 100644 kernel/trace/fprobe.c create mode 100644 kernel/trace/rethook.c create mode 100644 lib/test_fprobe.c create mode 100644 samples/fprobe/Makefile create mode 100644 samples/fprobe/fprobe_example.c -- Masami Hiramatsu (Linaro) <mhiramat@xxxxxxxxxx>
