can't unwind through trampoline created by uprobe

Hi,

I'm writing a eBPF-based profiler for C++ and Lua script recently, I unwind stacks in BPF similar to what cargo-trace does.

I found that stask frames always break when rip goes into address range of uprobes, because no unwind rules for uprobe trampoline in dwarf.

> 7ffdb018c000-7ffdb018e000 r-xp 00000000 00:00 0 [vdso]
7fffffffe000-7ffffffff000 --xp 00000000 00:00 0 [uprobes]
ffffffffff600000-ffffffffff601000 --xp 00000000 00:00 0 [vsyscall]

I have no idea how to unwind through it. Any suggestions?

No source file, test, or entry point is named. Start by searching cargo-trace for uprobe and stack-unwinding handling, then reproduce the reported break with the described eBPF profiler; done means establishing and validating a way to unwind past uprobe trampoline frames.

Written by the indexing model from the issue text.