//
//go:nosplit
//go:cgo_unsafe_args
//go:linkname syscall_syscall6
func syscall_syscall6(fn, nargs, a1, a2, a3, a4, a5, a6 uintptr) (r1, r2, err uintptr) {
	c := libcall{
		fn:   fn,
		n:    nargs,
		args: uintptr(unsafe.Pointer(&a1)),
	}

	entersyscallblock()
	asmcgocall(unsafe.Pointer(&asmsyscall6), unsafe.Pointer(&c))
	exitsyscall()
	return c.r1, 0, c.err
}

	syscalltick uint32
	freelink    *m // on sched.freem
	trace       mTraceState

	// these are here because they are too large to be on the stack
	// of low-level NOSPLIT functions.
	libcall    libcall
	libcallpc  uintptr // for cpu profiler
	libcallsp  uintptr
	libcallg   guintptr
	winsyscall winlibcall // stores syscall parameters on windows

	}
	if !isShrinkStackSafe(gp) {
		throw("shrinkstack at bad time")
	}
	// Check for self-shrinks while in a libcall. These may have
	// pointers into the stack disguised as uintptrs, but these
	// code paths should all be nosplit.
	if gp == getg().m.curg && gp.m.libcallsp != 0 {
		throw("shrinking stack in libcall")
	}

	if debug.gcshrinkstackoff > 0 {
		return
	}
	f := findfunc(gp.startpc)

// the initial PC must not be rewound to the previous instruction.
// (All the saved pairs record a PC that is a return address, so we
// rewind it into the CALL instruction.)
// If gp.m.libcall{g,pc,sp} information is available, it uses that information in preference to
// the pc/sp/lr passed in.
func tracebacktrap(pc, sp, lr uintptr, gp *g) {
	if gp.m.libcallsp != 0 {

	wakep()

	releasem(mp)

	return now
}

// usesLibcall indicates whether this runtime performs system calls
// via libcall.
func usesLibcall() bool {
	switch GOOS {
	case "aix", "darwin", "illumos", "ios", "solaris", "windows":
		return true
	case "openbsd":
		return GOARCH != "mips64"
	}
	return false
}