Created retprobe.rs to hold RetProbeContext and moved the ret from
ProbeContext in probe.rs into RetProbeContext. Now, only kprobe (which
uses ProbeContext) can access args, and kretprobe (which uses
RetProbeContext) can access ret.
Fixes: #700
```
warning: casting `u8` to `u64` may become silently lossy if you later change the type
warning: casting `u16` to `u64` may become silently lossy if you later change the type
warning: casting `u32` to `u64` may become silently lossy if you later change the type
warning: casting `i64` to `u64` may lose the sign of the value
warning: casting `i8` to `i64` may become silently lossy if you later change the type
warning: casting `i64` to `u64` may lose the sign of the value
warning: casting `i16` to `i64` may become silently lossy if you later change the type
warning: casting `i32` to `i64` may become silently lossy if you later change the type
--> ebpf/aya-ebpf/src/helpers.rs:753:27
|
753 | PrintkArg(x as $via as u64)
| ^
...
759 | / impl_integer_promotion!(
760 | | char: via u64,
761 | | u8: via u64,
762 | | u16: via u64,
... |
770 | | isize: via i64,
771 | | );
| |_- in this macro invocation
|
= help: for further information visit https://rust-lang.github.io/rust-clippy/master/index.html#cast_lossless
= note: this warning originates in the macro `impl_integer_promotion` (in Nightly builds, run with -Z macro-backtrace for more info)
```
Pass an array of bytes instead of u64 to avoid clippy sign warnings.
Wouter Dullaert
Tamir Duberstein
tyrone-wu
Alessandro Decina
Dave Tucker