// used again if callback decide to make syscall.
	winsyscall := gp.m.winsyscall

	// entersyscall saves the caller's SP to allow the GC to trace the Go
	// stack. However, since we're returning to an earlier stack frame and
	// need to pair with the entersyscall() call made by cgocall, we must
	// save syscall* and let reentersyscall restore them.
	savedsp := unsafe.Pointer(gp.syscallsp)
	savedpc := gp.syscallpc

// not from the low-level system calls used by the runtime.
//
// Entersyscall cannot split the stack: the save must
// make g->sched refer to the caller's stack segment, because
// entersyscall is going to return immediately after.
//
// Nothing entersyscall calls can split the stack either.
// We cannot safely move the stack during an active call to syscall,

	runtime.EnterSyscall()
	r0, e2, e1 := CallLeFuncWithErr(GetZosLibVec()+SYS_MUNMAP<<4, uintptr(addr), uintptr(length))
	runtime.ExitSyscall()
	if int64(r0) == -1 {
		err = errnoErr2(e1, e2)
	}
	return
}

// THIS FILE IS GENERATED BY THE COMMAND AT THE TOP; DO NOT EDIT

func ioctl(fd int, req int, arg uintptr) (err error) {
	runtime.EnterSyscall()

// The file contains tests that cannot run under race detector for some reason.
//
//go:build !race

package runtime_test

import (
	"runtime"
	"testing"
)

// Syscall tests split stack between Entersyscall and Exitsyscall under race detector.
func BenchmarkSyscall(b *testing.B) {
	benchmarkSyscall(b, 0, 1)
}

func BenchmarkSyscallWork(b *testing.B) {
	benchmarkSyscall(b, 100, 1)
}

func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
	entersyscall()
	libcCall(unsafe.Pointer(abi.FuncPCABI0(syscall)), unsafe.Pointer(&fn))
	exitsyscall()
	return
}
func syscall()

//go:linkname syscall_syscallX syscall.syscallX
//go:nosplit
//go:cgo_unsafe_args
func syscall_syscallX(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
	entersyscall()
	libcCall(unsafe.Pointer(abi.FuncPCABI0(syscallX)), unsafe.Pointer(&fn))

func SyscallNoError(trap, a1, a2, a3 uintptr) (r1, r2 uintptr) {
	syscall.Entersyscall()
	r := realSyscallNoError(trap, a1, a2, a3, 0, 0, 0, 0, 0, 0)
	syscall.Exitsyscall()
	return r, 0
}

func Syscall(trap, a1, a2, a3 uintptr) (r1, r2 uintptr, err syscall.Errno) {
	syscall.Entersyscall()
	r, errno := realSyscall(trap, a1, a2, a3, 0, 0, 0, 0, 0, 0)
	syscall.Exitsyscall()

//
//go:linkname syscall_syscall syscall.syscall
//go:nosplit
func syscall_syscall(fn, a1, a2, a3 uintptr) (r1, r2, err uintptr) {
	args := struct{ fn, a1, a2, a3, r1, r2, err uintptr }{fn, a1, a2, a3, r1, r2, err}
	entersyscall()
	libcCall(unsafe.Pointer(abi.FuncPCABI0(syscall)), unsafe.Pointer(&args))
	exitsyscall()
	return args.r1, args.r2, args.err
}
func syscall()

//go:linkname syscall_syscallX syscall.syscallX
//go:nosplit

}

func Close(fd int) (err error) {
	runtime.EnterSyscall()
	r0, e2, e1 := CallLeFuncWithErr(GetZosLibVec()+SYS_CLOSE<<4, uintptr(fd))
	runtime.ExitSyscall()
	for i := 0; e1 == EAGAIN && i < 10; i++ {
		runtime.EnterSyscall()
		CallLeFuncWithErr(GetZosLibVec()+SYS_USLEEP<<4, uintptr(10))
		runtime.ExitSyscall()
		runtime.EnterSyscall()
		r0, e2, e1 = CallLeFuncWithErr(GetZosLibVec()+SYS_CLOSE<<4, uintptr(fd))

TEXT errstr<>(SB),NOSPLIT,$0
	MOVQ    $41, BP
	SYSCALL
	RET

// func errstr() string
// Only used by package syscall.
// Grab error string due to a syscall made
// in entersyscall mode, without going
// through the allocator (issue 4994).
// See ../syscall/asm_plan9_amd64.s:/·Syscall/
TEXT runtime·errstr(SB),NOSPLIT,$16-16
	get_tls(AX)
	MOVQ	g(AX), BX
	MOVQ	g_m(BX), BX

TEXT errstr<>(SB),NOSPLIT,$0
	MOVL    $41, AX
	INT     $64
	RET

// func errstr() string
// Only used by package syscall.
// Grab error string due to a syscall made
// in entersyscall mode, without going
// through the allocator (issue 4994).
// See ../syscall/asm_plan9_386.s:/·Syscall/
TEXT runtime·errstr(SB),NOSPLIT,$8-8
	get_tls(AX)
	MOVL	g(AX), BX
	MOVL	g_m(BX), BX