1// Copyright 2018 The Go Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style
3// license that can be found in the LICENSE file.
4
5package runtime
6
7import (
8	"internal/goarch"
9	"runtime/internal/sys"
10	"unsafe"
11)
12
13type m0Stack struct {
14	_ [8192 * sys.StackGuardMultiplier]byte
15}
16
17var wasmStack m0Stack
18
19func wasmDiv()
20
21func wasmTruncS()
22func wasmTruncU()
23
24//go:wasmimport gojs runtime.wasmExit
25func wasmExit(code int32)
26
27// adjust Gobuf as it if executed a call to fn with context ctxt
28// and then stopped before the first instruction in fn.
29func gostartcall(buf *gobuf, fn, ctxt unsafe.Pointer) {
30	sp := buf.sp
31	sp -= goarch.PtrSize
32	*(*uintptr)(unsafe.Pointer(sp)) = buf.pc
33	buf.sp = sp
34	buf.pc = uintptr(fn)
35	buf.ctxt = ctxt
36}
37