On Fri, 16 Feb 2024 22:09:02 +0900 Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> wrote: > On Thu, 15 Feb 2024 11:11:34 -0500 > Steven Rostedt <rostedt@xxxxxxxxxxx> wrote: > > > On Wed, 7 Feb 2024 00:12:40 +0900 > > "Masami Hiramatsu (Google)" <mhiramat@xxxxxxxxxx> wrote: > > > > > From: Masami Hiramatsu (Google) <mhiramat@xxxxxxxxxx> > > > > > > Add ftrace_partial_regs() which converts the ftrace_regs to pt_regs. > > > If the architecture defines its own ftrace_regs, this copies partial > > > registers to pt_regs and returns it. If not, ftrace_regs is the same as > > > pt_regs and ftrace_partial_regs() will return ftrace_regs::regs. > > > > This says what this patch is doing and not why it is doing it. > > Hmm, OK. The reason is the eBPF needs this to keep the same pt_regs > interface to access registers. > Thus when replacing the pt_regs with ftrace_regs in fprobes (which is > used by kprobe_multi eBPF event), this will be required. > I'll add this to next version. Thanks, that should go into the change log. -- Steve
