RFR: 8299683: [S390X] Problems with -XX:+VerifyStack [v3]

[sid8606]

On Sat, 4 Feb 2023 03:44:46 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

>> if Z_RET = start pc + offs can not be used then let me explore on how to get that offset on s390x.
>
> I think something like `__ get_PC(Z_RET, oop_map_offs - __ offset());` should work with oop_map_offs taken from above where the `add_gc_map` is used.

@TheRealMDoerr I have tried your suggestion and it' s works. I am not seeing any regressions. Added a commit for this change.

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PR: https://git.openjdk.org/jdk/pull/12161