RFR: 8359359: AArch64: share trampolines between static calls to the same method [v6]

[Dean Long]

On Thu, 16 Oct 2025 15:43:30 GMT, Mikhail Ablakatov <mablakatov at openjdk.org> wrote:

>> We need to convert the check `callee != nullptr` into an assert.
>
> @eastig , I'm a bit stuck on [`gen_continuation_enter()`](https://github.com/openjdk/jdk/blob/master/src/hotspot/cpu/aarch64/sharedRuntime_aarch64.cpp#L1059). I can't figure out what the target of this static call is. Are you familiar with this portion of the codebase by any chance?

The target is Continuation::enter(), thanks to LinkResolver::resolve_continuation_enter().

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PR Review Comment: https://git.openjdk.org/jdk/pull/25954#discussion_r2437715928