// It is common to use a func literal as the argument, in order
// to share inputs and outputs with the code around the call
// to system stack:
//
//	... set up y ...
//	systemstack(func() {
//		x = bigcall(y)
//	})
//	... use x ...
//
//go:noescape
func systemstack(fn func())

//go:nosplit
//go:nowritebarrierrec
func badsystemstack() {
	writeErrStr("fatal: systemstack called from unexpected goroutine")
}

}

var a = []int{1, 2, 3}
var NIL []int

func arraycmptest() {
	if NIL != nil {
		println("fail1:", NIL, "!= nil")
		panic("bigalg")
	}
	if nil != NIL {
		println("fail2: nil !=", NIL)
		panic("bigalg")
	}
	if a == nil || nil == a {
		println("fail3:", a, "== nil")
		panic("bigalg")
	}
}

func SameArray(a, b []int) bool {
	if len(a) != len(b) || cap(a) != cap(b) {
		return false
	}

	} else {
		mp = nil
	}

	var libcall libcall
	libcall.fn = uintptr(unsafe.Pointer(fn))
	libcall.n = 1
	// TODO(rsc): Why is noescape necessary here and below?
	libcall.args = uintptr(noescape(unsafe.Pointer(&a1)))
	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
	if mp != nil {
		mp.libcallsp = 0
	}
	return libcall.r1, libcall.err
}

//go:nosplit

// func Syscall9(trap int32, a1, a2, a3, a4, a5, a6, a7, a8, a9 int64) (r1, r2, err int32)

TEXT	·Syscall(SB),NOSPLIT,$0-28
	BL runtime·entersyscall(SB)
	MOVW trap+0(FP), R0 // sigcall num
	MOVW a1+4(FP), R1 // a1
	MOVW a2+8(FP), R2 // a2
	MOVW a3+12(FP), R3 // a3
	SWI $0 // syscall
	MOVW $0, R2
	BCS error
	MOVW R0, r1+16(FP) // r1
	MOVW R1, r2+20(FP) // r2
	MOVW R2, err+24(FP) // err

func syscall_chdir(path uintptr) (err uintptr) {
	call := libcall{
		fn:   uintptr(unsafe.Pointer(&libc_chdir)),
		n:    1,
		args: uintptr(unsafe.Pointer(&path)),
	}
	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))
	return call.err
}

//go:nosplit
//go:linkname syscall_chroot
func syscall_chroot(path uintptr) (err uintptr) {
	call := libcall{
		fn:   uintptr(unsafe.Pointer(&libc_chroot)),
		n:    1,

//go:nosplit
//go:cgo_unsafe_args
func doMmap(addr, n, prot, flags, fd, off uintptr) (uintptr, uintptr) {
	var libcall libcall
	libcall.fn = uintptr(unsafe.Pointer(&libc_mmap))
	libcall.n = 6
	libcall.args = uintptr(noescape(unsafe.Pointer(&addr)))
	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&libcall))
	return libcall.r1, libcall.err
}

//go:nosplit
func munmap(addr unsafe.Pointer, n uintptr) {

			bigVal = bigVal.Lsh(bigVal, bitsPerByte).Or(bigVal, big.NewInt(int64(curVal)))
			if valEnd {
				if start == 0 {
					b.WriteString("2.")
					bigVal = bigVal.Sub(bigVal, big.NewInt(80))
				}
				numBuf = bigVal.Append(numBuf, 10)
				b.Write(numBuf)
				numBuf = numBuf[:0]
				val = 0
				start = i + 1
				overflow = false
			}
			continue
		}
		val <<= bitsPerByte
		val |= uint64(curVal)

//
//go:nosplit
func stdcall_no_g(fn stdFunction, n int, args uintptr) uintptr {
	libcall := libcall{
		fn:   uintptr(unsafe.Pointer(fn)),
		n:    uintptr(n),
		args: args,
	}
	asmstdcall_trampoline(noescape(unsafe.Pointer(&libcall)))
	return libcall.r1
}

// Calling stdcall on os stack.
// May run during STW, so write barriers are not allowed.
//
//go:nowritebarrier

	<-ch
}

func TestRaceMapBigValInsert(t *testing.T) {
	m := make(map[int]BigVal)
	var v BigVal
	ch := make(chan bool, 1)
	go func() {
		m[1] = v
		ch <- true
	}()
	v.y[30] = new(int)
	<-ch
}

func TestRaceMapBigValAccess1(t *testing.T) {
	m := make(map[int]BigVal)
	var v BigVal
	ch := make(chan bool, 1)
	go func() {
		v = m[1]
		ch <- true
	}()

	MOVM.DB.W [R4, R5, R14], (R13)	// push {r4, r5, lr}
	MOVW	R0, R4			// put libcall * in r4
	MOVW	R13, R5			// save stack pointer in r5

	// SetLastError(0)
	MOVW	$0, R0
	MRC	15, 0, R1, C13, C0, 2
	MOVW	R0, 0x34(R1)

	MOVW	8(R4), R12	// libcall->args

	// Do we have more than 4 arguments?
	MOVW	4(R4), R0	// libcall->n
	SUB.S	$4, R0, R2
	BLE	loadregs

	// Reserve stack space for remaining args