kern.malloc
	kern.nchstats
	kern.seminfo
	kern.shminfo
	kern.timecounter
	kern.tty
	kern.watchdog
	net.bpf
	net.ifq
	net.inet
	net.inet.ah
	net.inet.carp
	net.inet.divert
	net.inet.esp
	net.inet.etherip
	net.inet.gre
	net.inet.icmp
	net.inet.igmp
	net.inet.ip
	net.inet.ip.ifq
	net.inet.ipcomp
	net.inet.ipip
	net.inet.mobileip
	net.inet.pfsync
	net.inet.pim
	net.inet.tcp

	SYS_READLINK             = 58  // { ssize_t|sys||readlink(const char *path, char *buf, size_t count); }
	SYS_EXECVE               = 59  // { int|sys||execve(const char *path, char * const *argp, char * const *envp); }
	SYS_UMASK                = 60  // { mode_t|sys||umask(mode_t newmask); }
	SYS_CHROOT               = 61  // { int|sys||chroot(const char *path); }
	SYS_VFORK                = 66  // { int|sys||vfork(void); }

	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++

	auxvp := (*[1 << 28]uintptr)(add(unsafe.Pointer(argv), uintptr(n)*goarch.PtrSize))
	pairs := sysauxv(auxvp[:])

func syscall_dup2(oldfd, newfd uintptr) (val, err uintptr) {
	return syscall_fcntl(oldfd, _F_DUP2FD, newfd)
}

//go:nosplit
//go:linkname syscall_execve
//go:cgo_unsafe_args
func syscall_execve(path, argv, envp uintptr) (err uintptr) {
	call := libcall{
		fn:   uintptr(unsafe.Pointer(&libc_execve)),
		n:    3,
		args: uintptr(unsafe.Pointer(&path)),
	}
	asmcgocall(unsafe.Pointer(&asmsysvicall6x), unsafe.Pointer(&call))

func chdir(path uintptr) (err Errno)
func chroot1(path uintptr) (err Errno)
func closeFD(fd uintptr) (err Errno)
func dup2child(old uintptr, new uintptr) (val uintptr, err Errno)
func execve(path uintptr, argv uintptr, envp uintptr) (err Errno)
func exit(code uintptr)
func fcntl1(fd uintptr, cmd uintptr, arg uintptr) (val uintptr, err Errno)
func forkx(flags uintptr) (pid uintptr, err Errno)
func getpid() (pid uintptr, err Errno)

	Esi    uint32
	Ebp    uint32
	Isp    uint32
	Ebx    uint32
	Edx    uint32
	Ecx    uint32
	Eax    uint32
	Trapno uint32
	Err    uint32
	Eip    uint32
	Cs     uint32
	Eflags uint32
	Esp    uint32
	Ss     uint32
	Gs     uint32
}

type FpReg struct {
	Env   [7]uint32
	Acc   [8][10]uint8
	Ex_sw uint32
	Pad   [64]uint8
}

type FpExtendedPrecision struct{}

	DI:   "DI",
	R8W:  "R8",
	R9W:  "R9",
	R10W: "R10",
	R11W: "R11",
	R12W: "R12",
	R13W: "R13",
	R14W: "R14",
	R15W: "R15",
	EAX:  "AX",
	ECX:  "CX",
	EDX:  "DX",
	EBX:  "BX",
	ESP:  "SP",
	EBP:  "BP",
	ESI:  "SI",
	EDI:  "DI",
	R8L:  "R8",
	R9L:  "R9",
	R10L: "R10",
	R11L: "R11",
	R12L: "R12",
	R13L: "R13",
	R14L: "R14",
	R15L: "R15",
	RAX:  "AX",
	RCX:  "CX",

	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))

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