}
		for i := 0; i < nsym; i++ {
			s.AddUint64(ctxt.Arch, uint64(chain[i]))
		}
	} else {
		s.AddUint32(ctxt.Arch, uint32(nbucket))
		s.AddUint32(ctxt.Arch, uint32(nsym))
		for i := 0; i < nbucket; i++ {
			s.AddUint32(ctxt.Arch, buckets[i])
		}
		for i := 0; i < nsym; i++ {
			s.AddUint32(ctxt.Arch, chain[i])
		}
	}

	dynstr := ldr.CreateSymForUpdate(".dynstr", 0)

	// version symbols

	if err != nil {
		t.Fatalf("failed to mmap memory: %v", err)
	}
	defer syscall.Munmap(data)
	p := (*uint32)(unsafe.Pointer(&data[0]))
	atomic.AddUint32(p, 1)
	(*p)++
	if *p != 2 {
		t.Fatalf("data[0] = %v, expect 2", *p)
	}

TEXT ·CompareAndSwapInt64(SB),NOSPLIT,$0
	JMP	internal∕runtime∕atomic·Cas64(SB)

TEXT ·CompareAndSwapUint64(SB),NOSPLIT,$0
	JMP	internal∕runtime∕atomic·Cas64(SB)

TEXT ·AddInt32(SB),NOSPLIT,$0
	JMP	internal∕runtime∕atomic·Xadd(SB)

TEXT ·AddUint32(SB),NOSPLIT,$0
	JMP	internal∕runtime∕atomic·Xadd(SB)

TEXT ·AddUintptr(SB),NOSPLIT,$0
	JMP	internal∕runtime∕atomic·Xadduintptr(SB)

TEXT ·AddInt64(SB),NOSPLIT,$0

		for i, right := range n.Rhs {
			call, ok := right.(*ast.CallExpr)
			if !ok {
				continue
			}
			fn := typeutil.StaticCallee(pass.TypesInfo, call)
			if analysisutil.IsFunctionNamed(fn, "sync/atomic", "AddInt32", "AddInt64", "AddUint32", "AddUint64", "AddUintptr") {
				checkAtomicAddAssignment(pass, n.Lhs[i], call)
			}
		}
	})
	return nil, nil
}

// checkAtomicAddAssignment walks the atomic.Add* method calls checking

	}

	// This should not fault.
	a := (*uint32)(unsafe.Pointer(&b[pagesize-4]))
	atomic.StoreUint32(a, 1)
	if x := atomic.LoadUint32(a); x != 1 {
		t.Fatalf("bad atomic value: %v, want 1", x)
	}
	if x := atomic.AddUint32(a, 1); x != 2 {
		t.Fatalf("bad atomic value: %v, want 2", x)
	}

		plt.SetUint32(ctxt.Arch, plt.Size()-4, 0x91000210)

		// br      x17
		plt.AddUint32(ctxt.Arch, 0xd61f0220)

		// 3 nop for place holder
		plt.AddUint32(ctxt.Arch, 0xd503201f)
		plt.AddUint32(ctxt.Arch, 0xd503201f)
		plt.AddUint32(ctxt.Arch, 0xd503201f)

		// check gotplt.size == 0
		if gotplt.Size() != 0 {

// indices of servers in c.servers when making queries.
// When the rotate option is enabled, this offset increases.
// Otherwise it is always 0.
func (c *dnsConfig) serverOffset() uint32 {
	if c.rotate {
		return atomic.AddUint32(&c.soffset, 1) - 1 // return 0 to start
	}
	return 0

	tables := []Table{TableMangle, TableFilter, TableNAT}
	go ipt.Monitor(canary, tables, func() {
		if !ensureNoChains(mfe) {
			t.Errorf("reload called while canaries still exist")
		}
		atomic.AddUint32(&reloads, 1)
	}, 100*time.Millisecond, stopCh)

	// Monitor should create canary chains quickly
	if err := waitForChains(mfe, canary, tables); err != nil {
		t.Errorf("failed to create iptables canaries: %v", err)

		plt.AddUint8(0x10)
		plt.AddUint8(0x0c)
		plt.AddUint8(0x00)
		plt.AddUint8(0x14)
		// jg .plt
		plt.AddUint8(0xc0)
		plt.AddUint8(0xf4)

		plt.AddUint32(target.Arch, uint32(-((plt.Size() - 2) >> 1))) // roll-your-own relocation
		//.plt index
		plt.AddUint32(target.Arch, uint32(rela.Size())) // rela size before current entry

		// rela
		rela.AddAddrPlus(target.Arch, got.Sym(), got.Size()-8)

		// add to got: pointer to current pos in plt
		got.AddAddrPlus(target.Arch, plt.Sym(), plt.Size())

		// pushq $x
		plt.AddUint8(0x68)

		plt.AddUint32(target.Arch, uint32((got.Size()-24-8)/8))

		// jmpq .plt
		plt.AddUint8(0xe9)

		plt.AddUint32(target.Arch, uint32(-(plt.Size() + 4)))

		// rela
		rela.AddAddrPlus(target.Arch, got.Sym(), got.Size()-8)

		sDynid := ldr.SymDynid(s)