How Arguments Get Into Registers: Passing Under the System V AMD64 ABI

You write parameters between parentheses; the CPU reads them out of registers. This topic verifies the routes of the first integer and floating-point arguments one by one under the System V AMD64 convention, plus where extra arguments go, how structs get split, and how values come back.

STARTFINISHHow Arguments Get Into Registers: The Integer Allocation Table→STARTFINISHThe 7th Argument Goes on the Stack, and the Two Routes a Return Value Takes→STARTFINISHFloat Arguments, Struct Packing, and Where the ABI Document Comes From→