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Reverting edit(s) by 2402:3A80:CB3:6D28:839E:94E9:29F2:AF4C (talk) to rev. 1096728389 by Vejlenser: non-constructive (RW 16.1) |
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In either case, the modifications may be performed directly to the [[machine code]] instructions themselves, by [[overlapping instructions|overlaying]] new instructions over the existing ones (for example: altering a compare and branch to an [[unconditional branch]] or alternatively a '[[NOP (code)|NOP]]').
In the [[IBM System/360 architecture]], and its successors up to [[z/Architecture]], an EXECUTE (EX) instruction ''logically'' overlays the second byte of its target instruction with the low-order 8 bits of [[general purpose register|register]] 1. This provides the effect of self-
==Application in low and high level languages==
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