RFR: 8289743: AArch64: Clean up patching logic [v13]

[Andrew Haley]

On Thu, 21 Jul 2022 09:30:34 GMT, Nick Gasson <ngasson at openjdk.org> wrote:

> We are seeing some new crashes after this change. The cause seems to be bad values using ADRP: see JDK-8290780.

I'm on it now. I think it might be a sign-extension bug when calculating the page offset.

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PR: https://git.openjdk.org/jdk/pull/9398