RFR: 8299683: [S390X] Problems with -XX:+VerifyStack [v2]

[Martin Doerr]

On Fri, 3 Feb 2023 15:51:11 GMT, sid8606 <duke at openjdk.org> wrote:

>> I think you can't use this get_PC version for the intended purpose. It doesn't set Z_RET = start pc + offs which is what you probably wanted.
>
> 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.

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