shim

<jargon, memory management> A small piece of data inserted in order to achieve a desired memory alignment or other addressing property.

For example, the PDP-11 Unix linker, in split I&D (instructions and data) mode, inserts a two-byte shim at location 0 in data space so that no data object will have an address of 0 (and be confused with the C null pointer).

See also loose bytes.

[Jargon File]

Last updated: 1994-12-21

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Nearby terms: shift left logical « Shift Out « shift right logical « shim » shit hit the fan » shitogram » Shockwave


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