diff --git a/src/cmd/internal/obj/arm64/obj7.go b/src/cmd/internal/obj/arm64/obj7.go
index 9774e0120bd..0e16e287a78 100644
--- a/src/cmd/internal/obj/arm64/obj7.go
+++ b/src/cmd/internal/obj/arm64/obj7.go
@@ -289,11 +289,12 @@ func (c *ctxt7) stacksplit(p *obj.Prog, framesize int32) *obj.Prog {
 	}
 	call.To.Sym = c.ctxt.Lookup(morestack)
 
-	unspill := c.cursym.Func().UnspillRegisterArgs(call, c.newprog)
-	pcdata = c.ctxt.EndUnsafePoint(unspill, c.newprog, -1)
+	// The instructions which unspill regs should be preemptible.
+	pcdata = c.ctxt.EndUnsafePoint(call, c.newprog, -1)
+	unspill := c.cursym.Func().UnspillRegisterArgs(pcdata, c.newprog)
 
 	// B	start
-	jmp := obj.Appendp(pcdata, c.newprog)
+	jmp := obj.Appendp(unspill, c.newprog)
 	jmp.As = AB
 	jmp.To.Type = obj.TYPE_BRANCH
 	jmp.To.SetTarget(startPred.Link)
diff --git a/src/cmd/internal/obj/ppc64/obj9.go b/src/cmd/internal/obj/ppc64/obj9.go
index 02831b890a3..da95e65079c 100644
--- a/src/cmd/internal/obj/ppc64/obj9.go
+++ b/src/cmd/internal/obj/ppc64/obj9.go
@@ -1363,11 +1363,12 @@ func (c *ctxt9) stacksplit(p *obj.Prog, framesize int32) *obj.Prog {
 		p.To.Reg = REG_R2
 	}
 
+	// The instructions which unspill regs should be preemptible.
+	p = c.ctxt.EndUnsafePoint(p, c.newprog, -1)
 	unspill := c.cursym.Func().UnspillRegisterArgs(p, c.newprog)
-	p = c.ctxt.EndUnsafePoint(unspill, c.newprog, -1)
 
 	// BR	start
-	p = obj.Appendp(p, c.newprog)
+	p = obj.Appendp(unspill, c.newprog)
 	p.As = ABR
 	p.To.Type = obj.TYPE_BRANCH
 	p.To.SetTarget(startPred.Link)
diff --git a/src/cmd/internal/obj/riscv/obj.go b/src/cmd/internal/obj/riscv/obj.go
index 7b5621f6508..675031de73f 100644
--- a/src/cmd/internal/obj/riscv/obj.go
+++ b/src/cmd/internal/obj/riscv/obj.go
@@ -913,8 +913,9 @@ func stacksplit(ctxt *obj.Link, p *obj.Prog, cursym *obj.LSym, newprog obj.ProgA
 	}
 	jalToSym(ctxt, p, REG_X5)
 
-	p = cursym.Func().UnspillRegisterArgs(p, newprog)
+	// The instructions which unspill regs should be preemptible.
 	p = ctxt.EndUnsafePoint(p, newprog, -1)
+	p = cursym.Func().UnspillRegisterArgs(p, newprog)
 
 	// JMP start
 	p = obj.Appendp(p, newprog)
diff --git a/src/cmd/internal/obj/x86/obj6.go b/src/cmd/internal/obj/x86/obj6.go
index fc4007ec88b..e6ea8985e4f 100644
--- a/src/cmd/internal/obj/x86/obj6.go
+++ b/src/cmd/internal/obj/x86/obj6.go
@@ -1226,10 +1226,11 @@ func stacksplit(ctxt *obj.Link, cursym *obj.LSym, p *obj.Prog, newprog obj.ProgA
 		progedit(ctxt, callend.Link, newprog)
 	}
 
-	pcdata = cursym.Func().UnspillRegisterArgs(callend, newprog)
-	pcdata = ctxt.EndUnsafePoint(pcdata, newprog, -1)
+	// The instructions which unspill regs should be preemptible.
+	pcdata = ctxt.EndUnsafePoint(callend, newprog, -1)
+	unspill := cursym.Func().UnspillRegisterArgs(pcdata, newprog)
 
-	jmp := obj.Appendp(pcdata, newprog)
+	jmp := obj.Appendp(unspill, newprog)
 	jmp.As = obj.AJMP
 	jmp.To.Type = obj.TYPE_BRANCH
 	jmp.To.SetTarget(startPred.Link)