Shared Memory on System V

[Bernard CASSAGNE]

When reading "shmat(2)" specification, it seems possible :

a) To attach a segment of length N at address A
b) To attach a second segment at address A+N
c) To address the two segments as a contiguous space.

This is impossible on a 3B2 machine, but seems possible when reading
source kernal files for VAX.

Is there any ATT specification about such usage of shared memory ?

Thank you for all ideas by mailing thru :
UUCP :  ...seismo!mcvax!vmucnam!imag!bernard