RFR: 8370708: RISC-V: Add VerifyStackAtCalls [v4]

[Robbin Ehn]

> Hi, please consider.
> 
> Sanity tested and no issues with MAJIK t1 (with +VSC).
> 
> Thanks, Robbin

Robbin Ehn has updated the pull request incrementally with one additional commit since the last revision:

  Fixed format

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/28005/files
  - new: https://git.openjdk.org/jdk/pull/28005/files/1a2059f6..0dfed06f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=28005&range=03
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=28005&range=02-03

  Stats: 6 lines in 1 file changed: 3 ins; 3 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/28005.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/28005/head:pull/28005

PR: https://git.openjdk.org/jdk/pull/28005