System Architecture 2-21
UNIX Kernel and Semaphore-Allocation Parameters
Figure2-1
Shared memory
mustbe attached to
a user process so
that it looks like
contiguous
memory.
Operating system memory
User process
SHMBASE
Next segment
attaches here when
lowerboundary istoo
large.
Next segment of
shared memory
should attach here.
Gap
Shared-memory
segment
Shared-memory
segment