Messages in this thread | | | Date | Wed, 13 Mar 2024 00:39:01 +0900 | From | Masami Hiramatsu (Google) <> | Subject | [GIT PULL] probes: Updates for v6.9 |
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Hi Linus,
Probes updates for v6.9:
- x96/kprobes: Use boolean for some function return instead of 0 and 1. - x86/kprobes: Prohibit probing on INT/UD. This prevents user to put kprobe on INTn/INT1/INT3/INTO and UD0/UD1/UD2 because these are used for a special purpose in the kernel. - x86/kprobes: Boost Grp instructions. Because a few percent of kernel instructions are Grp 2/3/4/5 and those are safe to be executed without ip register fixup, allow those to be boosted (direct execution on the trampoline buffer with a JMP).
- tracing/probes: Add function argument access from return events (kretprobe and fprobe). This allows user to compare how a data structure field is changed after executing a function. With BTF, return event also accepts function argument access by name. This also includes below patches; . Fix a wrong comment (using "Kretprobe" in fprobe) . Cleanup a big probe argument parser function into three parts, type parser, post-processing function, and main parser. . Cleanup to set nr_args field when initializing trace_probe instead of counting up it while parsing. . Cleanup a redundant #else block from tracefs/README source code. . Update selftests to check entry argument access from return probes. . Documentation update about entry argument access from return probes.
Please pull the latest probes-v6.9 tree, which can be found at:
git://git.kernel.org/pub/scm/linux/kernel/git/trace/linux-trace.git probes-v6.9
Tag SHA1: 4c6745d26a2ff77a803db82beb2168f9c37b8f2b Head SHA1: e8c32f24766a1f22da024e73d1eb8e9c822482ac
Jinghao Jia (3): x86/kprobes: Refactor can_{probe,boost} return type to bool x86/kprobes: Prohibit kprobing on INT and UD x86/kprobes: Boost more instructions from grp2/3/4/5
Masami Hiramatsu (Google) (7): tracing/fprobe-event: cleanup: Fix a wrong comment in fprobe event tracing/probes: Cleanup probe argument parser tracing/probes: cleanup: Set trace_probe::nr_args at trace_probe_init tracing: Remove redundant #else block for BTF args from README tracing/probes: Support $argN in return probe (kprobe and fprobe) selftests/ftrace: Add test cases for entry args at function exit Documentation: tracing: Add entry argument access at function exit
---- Documentation/trace/fprobetrace.rst | 31 ++ Documentation/trace/kprobetrace.rst | 9 + arch/x86/kernel/kprobes/common.h | 2 +- arch/x86/kernel/kprobes/core.c | 98 +++-- kernel/trace/trace.c | 5 +- kernel/trace/trace_eprobe.c | 8 +- kernel/trace/trace_fprobe.c | 59 ++- kernel/trace/trace_kprobe.c | 58 ++- kernel/trace/trace_probe.c | 417 +++++++++++++++------ kernel/trace/trace_probe.h | 30 +- kernel/trace/trace_probe_tmpl.h | 10 +- kernel/trace/trace_uprobe.c | 14 +- .../ftrace/test.d/dynevent/fprobe_entry_arg.tc | 18 + .../ftrace/test.d/dynevent/fprobe_syntax_errors.tc | 4 + .../ftrace/test.d/kprobe/kprobe_syntax_errors.tc | 2 + .../ftrace/test.d/kprobe/kretprobe_entry_arg.tc | 18 + 16 files changed, 584 insertions(+), 199 deletions(-) create mode 100644 tools/testing/selftests/ftrace/test.d/dynevent/fprobe_entry_arg.tc create mode 100644 tools/testing/selftests/ftrace/test.d/kprobe/kretprobe_entry_arg.tc
-- Masami Hiramatsu (Google) <mhiramat@kernel.org>
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