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variadic function

A function that accepts a varying number of arguments, like printf.

A variadic function (declared with ...) receives a variable argument list; ABIs treat its unnamed arguments specially, for example Apple's ARM64 ABI passes them all on the stack where standard AAPCS64 uses registers.

Examples

  • printf is variadic. On Apple's ARM64, its variable arguments go on the stack, not in registers.

See also

AAPCS64 ABI
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