X86 calling conventions

X86 calling conventions define the interface between called code and its caller when programming x86 microprocessors. They specify the order and placement of parameters, which registers a called function preserves, and how stack preparation and restoration are divided between caller and callee. Calling conventions are related to type representations and name mangling as parts of an application binary interface. Compiler implementations can differ, making interoperability difficult, though API standards such as stdcall are uniformly implemented.

The picture on this card was made with AI. It is an illustration, not a real photo of the subject.

Subject

Calling conventions for x86 microprocessors

Parameter passing

Stack, registers, or both

ABI relationship

Part of an application binary interface