si_status int32
	si_addr   uint64
	si_value  [8]byte
	_reason   [40]byte
}

type mcontext struct {
	mc_onstack       uint64
	mc_rdi           uint64
	mc_rsi           uint64
	mc_rdx           uint64
	mc_rcx           uint64
	mc_r8            uint64
	mc_r9            uint64
	mc_rax           uint64
	mc_rbx           uint64
	mc_rbp           uint64
	mc_r10           uint64

	si_uid    uint32
	si_status int32
	si_addr   uint64
	si_value  [8]byte
	_reason   [40]byte
}

type gpregs struct {
	gp_ra      uint64
	gp_sp      uint64
	gp_gp      uint64
	gp_tp      uint64
	gp_t       [7]uint64
	gp_s       [12]uint64
	gp_a       [8]uint64
	gp_sepc    uint64
	gp_sstatus uint64
}

type fpregs struct {
	fp_x     [64]uint64 // actually __uint64_t fp_x[32][2]
	fp_fcsr  uint64

	_O_CLOEXEC   = 0x80000
	_SA_RESTORER = 0
)

type ptregs struct {
	gpr       [32]uint64
	nip       uint64
	msr       uint64
	orig_gpr3 uint64
	ctr       uint64
	link      uint64
	xer       uint64
	ccr       uint64
	softe     uint64
	trap      uint64
	dar       uint64
	dsisr     uint64
	result    uint64
}

type vreg struct {
	u [4]uint32
}

type stackt struct {

}

type regs64 struct {
	rax    uint64
	rbx    uint64
	rcx    uint64
	rdx    uint64
	rdi    uint64
	rsi    uint64
	rbp    uint64
	rsp    uint64
	r8     uint64
	r9     uint64
	r10    uint64
	r11    uint64
	r12    uint64
	r13    uint64
	r14    uint64
	r15    uint64
	rip    uint64
	rflags uint64
	cs     uint64
	fs     uint64
	gs     uint64
}

type floatstate64 struct {

		name     string
		quota    int64
		period   int64
		expected int64
	}{
		{
			name:     "50m",
			quota:    int64(5000),
			period:   int64(100000),
			expected: int64(50),
		},
		{
			name:     "750m",
			quota:    int64(75000),
			period:   int64(100000),
			expected: int64(750),
		},
		{
			name:     "1000m",
			quota:    int64(100000),
			period:   int64(100000),

}

type sigcontext struct {
	sc_rdi      uint64
	sc_rsi      uint64
	sc_rdx      uint64
	sc_rcx      uint64
	sc_r8       uint64
	sc_r9       uint64
	sc_r10      uint64
	sc_r11      uint64
	sc_r12      uint64
	sc_r13      uint64
	sc_r14      uint64
	sc_r15      uint64
	sc_rbp      uint64
	sc_rbx      uint64
	sc_rax      uint64
	sc_gs       uint64
	sc_fs       uint64
	sc_es       uint64

type user_regs_struct struct {
	pc  uint64
	ra  uint64
	sp  uint64
	gp  uint64
	tp  uint64
	t0  uint64
	t1  uint64
	t2  uint64
	s0  uint64
	s1  uint64
	a0  uint64
	a1  uint64
	a2  uint64
	a3  uint64
	a4  uint64
	a5  uint64
	a6  uint64
	a7  uint64
	s2  uint64
	s3  uint64
	s4  uint64
	s5  uint64
	s6  uint64
	s7  uint64
	s8  uint64
	s9  uint64
	s10 uint64

	tf_tcb   unsafe.Pointer
	tf_tid   *int32
	tf_stack uintptr
}

type sigcontext struct {
	sc_cookie  uint64
	sc_mask    uint64
	sc_pc      uint64
	sc_regs    [32]uint64
	mullo      uint64
	mulhi      uint64
	sc_fpregs  [33]uint64
	sc_fpused  uint64
	sc_fpc_eir uint64
	_xxx       [8]int64
}

type siginfo struct {
	si_signo  int32
	si_code   int32
	si_errno  int32
	pad_cgo_0 [4]byte

	Size    int64
	Blocks  int64
	Blksize int32
	Flags   uint32
	Gen     uint64
	Spare   [10]uint64
}

type Statfs_t struct {
	Version     uint32
	Type        uint32
	Flags       uint64
	Bsize       uint64
	Iosize      uint64
	Blocks      uint64
	Bfree       uint64
	Bavail      int64
	Files       uint64
	Ffree       int64
	Syncwrites  uint64
	Asyncwrites uint64
	Syncreads   uint64

	return old
}

//go:nosplit
//go:noinline
func Xchg64(ptr *uint64, new uint64) uint64 {
	old := *ptr
	*ptr = new
	return old
}

//go:nosplit
//go:noinline
func Xchgint32(ptr *int32, new int32) int32 {
	old := *ptr
	*ptr = new
	return old
}

//go:nosplit
//go:noinline
func Xchgint64(ptr *int64, new int64) int64 {
	old := *ptr
	*ptr = new
	return old
}