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System Architecture 2-21
UNIX Kernel and Semaphore-Allocation Parameters
Figure 2-1
Shared memory
must be attached to
a user process so
that it looks like
contiguous
memory.
Operating system memory
User process
SHMBASE
Next segment
attaches here when
lowerboundaryistoo
large.
Next segment of
shared memory
should attach here.
Gap
Shared-memory
segment
Shared-memory
segment