all: power64 is now ppc64
Fixes #8654.
LGTM=austin
R=austin
CC=golang-codereviews
https://golang.org/cl/180600043
diff --git a/src/runtime/sys_ppc64x.go b/src/runtime/sys_ppc64x.go
new file mode 100644
index 0000000..b0c0331
--- /dev/null
+++ b/src/runtime/sys_ppc64x.go
@@ -0,0 +1,37 @@
+// Copyright 2014 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ppc64 ppc64le
+
+package runtime
+
+import "unsafe"
+
+// adjust Gobuf as if it executed a call to fn with context ctxt
+// and then did an immediate Gosave.
+func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
+ if buf.lr != 0 {
+ gothrow("invalid use of gostartcall")
+ }
+ buf.lr = buf.pc
+ buf.pc = uintptr(fn)
+ buf.ctxt = ctxt
+}
+
+// Called to rewind context saved during morestack back to beginning of function.
+// To help us, the linker emits a jmp back to the beginning right after the
+// call to morestack. We just have to decode and apply that jump.
+func rewindmorestack(buf *gobuf) {
+ var inst uint32
+ if buf.pc&3 == 0 && buf.pc != 0 {
+ inst = *(*uint32)(unsafe.Pointer(buf.pc))
+ if inst>>26 == 18 && inst&3 == 0 {
+ //print("runtime: rewind pc=", hex(buf.pc), " to pc=", hex(uintptr(buf.pc + int32(inst<<6)>>6)), "\n");
+ buf.pc += uintptr(int32(inst<<6) >> 6)
+ return
+ }
+ }
+ print("runtime: pc=", hex(buf.pc), " ", hex(inst), "\n")
+ gothrow("runtime: misuse of rewindmorestack")
+}
