RFR: 8361536: [s390x] Saving return_pc at wrong offset [v2]

[Amit Kumar]

On Fri, 1 Aug 2025 21:07:29 GMT, Martin Doerr <mdoerr at openjdk.org> wrote:

> I did not request reverting it. I only corrected the wrong description. You can use your favorite offsets :-)

Hi Martin, 
I reverted, because release build was crashing (I added crash log above). Mathematically, offset 80 should be fine to use. So I had to debug that.
I found out that mistakenly `Z_F14` was saved at offset `127` instead of `128`, which corrupted `Z_F13` register. That is fixed now. I am running test again.

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PR Comment: https://git.openjdk.org/jdk/pull/26209#issuecomment-3209017058