tree 130ee0037103ce98ee545cc7f19ede9fedad25e1
parent 4751db93ef23c87c0fa2f06433555b7084f339bd
author Cherry Zhang <cherryyz@google.com> 1572396120 -0400
committer Cherry Zhang <cherryyz@google.com> 1573159545 +0000

runtime: add async preemption support on S390X

This CL adds support of call injection and async preemption on
S390X.

Like ARM64, we need to clobber one register (REGTMP) for
returning from the injected call. Previous CLs have marked code
sequences that use REGTMP async-nonpreemtible.

Change-Id: I78adbc5fd70ca245da390f6266623385b45c9dfc
Reviewed-on: https://go-review.googlesource.com/c/go/+/204106
Reviewed-by: Keith Randall <khr@golang.org>