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https://github.com/edk2-porting/linux-next.git
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e65f7ae7f4
Support user-space dereference syntax for probe event arguments to dereference the data-structure or array in user-space. The syntax is just adding 'u' before an offset value. +|-u<OFFSET>(<FETCHARG>) e.g. +u8(%ax), +u0(+0(%si)) For example, if you probe do_sched_setscheduler(pid, policy, param) and record param->sched_priority, you can add new probe as below; p do_sched_setscheduler priority=+u0($arg3) Note that kprobe event provides this and it doesn't change the dereference method automatically because we do not know whether the given address is in userspace or kernel on some archs. So as same as "ustring", this is an option for user, who has to carefully choose the dereference method. Link: http://lkml.kernel.org/r/155789872187.26965.4468456816590888687.stgit@devnote2 Acked-by: Ingo Molnar <mingo@kernel.org> Signed-off-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Steven Rostedt (VMware) <rostedt@goodmis.org> |
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| .. | ||
| postprocess | ||
| coresight-cpu-debug.txt | ||
| coresight.txt | ||
| events-kmem.rst | ||
| events-msr.rst | ||
| events-nmi.rst | ||
| events-power.rst | ||
| events.rst | ||
| ftrace-design.rst | ||
| ftrace-uses.rst | ||
| ftrace.rst | ||
| function-graph-fold.vim | ||
| histogram.rst | ||
| hwlat_detector.rst | ||
| index.rst | ||
| intel_th.rst | ||
| kprobetrace.rst | ||
| mmiotrace.rst | ||
| ring-buffer-design.txt | ||
| stm.rst | ||
| sys-t.rst | ||
| tracepoint-analysis.rst | ||
| tracepoints.rst | ||
| uprobetracer.rst | ||