I have made a small change in the code because NBExternalAdress does not inherit from NBExternalStructure anymore. It is safe?. I mean so far no problems but my understanding is limited so I haven't make any commit.

getGlobalSymbolPointer: symbolName�

| bytes addr |

bytes := ByteArray new: 8.

self bootstrapGetGlobalSymbolPointer: symbolName into: bytes.

addr := bytes unsignedLongAt: 1 bigEndian: false.

addr = 0

ifTrue: [self error: 'failed to get a symbol address: ' , symbolName].

+^ NBExternalAddress ulongAt: addr

-^ NBExternalAddress value: addr

Cheers