entities.put("scaron", "\u0161");
        entities.put("Yuml", "\u0178");
        entities.put("circ", "\u02c6");
        entities.put("tilde", "\u02dc");
        entities.put("ensp", "\u2002");
        entities.put("emsp", "\u2003");
        entities.put("thinsp", "\u2009");
        entities.put("zwnj", "\u200c");
        entities.put("zwj", "\u200d");
        entities.put("lrm", "\u200e");

	"∅":                          "\u2205",
	" ":                          "\u2004",
	" ":                          "\u2005",
	" ":                            "\u2003",
	"ŋ":                             "\u014b",
	" ":                            "\u2002",
	"ę":                           "\u0119",
	"𝕖":                            "\U0001d556",

	"OElig":    "\u0152",
	"oelig":    "\u0153",
	"Scaron":   "\u0160",
	"scaron":   "\u0161",
	"Yuml":     "\u0178",
	"circ":     "\u02C6",
	"tilde":    "\u02DC",
	"ensp":     "\u2002",
	"emsp":     "\u2003",
	"thinsp":   "\u2009",
	"zwnj":     "\u200C",
	"zwj":      "\u200D",
	"lrm":      "\u200E",
	"rlm":      "\u200F",
	"ndash":    "\u2013",
	"mdash":    "\u2014",

                public Process exec(String command, String[] envp) { return null; }
                public Process exec(String command, String[] envp, File file) { return null; }
                public Process exec(String command, List<?> envp, File file) { return null; }
                public Process exec(String[] command) { return null; }
                public Process exec(String[] command, String[] envp) { return null; }

        externalProcessStarted(command, consumer);
        return runtime.exec(command, envp);
    }

    public static Process exec(Runtime runtime, String[] command, String[] envp, String consumer) throws IOException {
        externalProcessStarted(command, consumer);
        return runtime.exec(command, envp);
    }

// avoids a build dependency for other platforms.
var execveLibc func(path uintptr, argv uintptr, envp uintptr) Errno
var execveDarwin func(path *byte, argv **byte, envp **byte) error
var execveOpenBSD func(path *byte, argv **byte, envp **byte) error

// Exec invokes the execve(2) system call.
func Exec(argv0 string, argv []string, envv []string) (err error) {

	// sequence of string pointers followed by a NULL, and auxv.
	// The TLS pointer should be initialized to 0.
	//
	// In an ELFv2 compliant dynamically linked binary, R3 contains argc,
	// R4 contains argv, R5 contains envp, R6 contains auxv, and R13
	// contains the TLS pointer.
	//
	// When loading via glibc, the first doubleword on the stack points
	// to NULL a value. (that is *(uintptr)(R1) == 0). This is used to

//sys	getcwd(buf []byte) (n int, err error)
//sys	sysctl(mib []_C_int, old *byte, oldlen *uintptr, new *byte, newlen uintptr) (err error)
//sysnb fork() (pid int, err error)
//sysnb execve(path *byte, argv **byte, envp **byte) (err error)
//sysnb exit(res int) (err error)
//sys   ptrace(request int, pid int, addr uintptr, data uintptr) (err error)
//sysnb getentropy(p []byte) (err error)

	fs        floatstate64
	pad_cgo_0 [4]byte
}

type regs32 struct {
	eax    uint32
	ebx    uint32
	ecx    uint32
	edx    uint32
	edi    uint32
	esi    uint32
	ebp    uint32
	esp    uint32
	ss     uint32
	eflags uint32
	eip    uint32
	cs     uint32
	ds     uint32
	es     uint32
	fs     uint32
	gs     uint32
}

type floatstate32 struct {
	fpu_reserved  [2]int32

	setThreadCPUProfilerHz(hz)
}

//go:nosplit
func validSIGPROF(mp *m, c *sigctxt) bool {
	return true
}

func sysargs(argc int32, argv **byte) {
	n := argc + 1

	// skip over argv, envp to get to auxv
	for argv_index(argv, n) != nil {
		n++
	}

	// skip NULL separator
	n++

	// now argv+n is auxv
	auxvp := (*[1 << 28]uintptr)(add(unsafe.Pointer(argv), uintptr(n)*goarch.PtrSize))