parameter identification

[hackhaye]

By reading ghidra's source code, I found ghidra simply by "ParamListStandard: : possibleParam" and "ParamListStandardOut: : possibleParam" to figure out whether the current address and size of the corresponding varnode parameters or return values . I am curious, is this judgment method just a simple judgment according to the parameter passing rules, for example, under x64, the first 6 registers are rdi, rsi, rdx, rcx, r8, r9, and the rest of the addresses on the stack are other parameters?

What should I do if I want to quickly implement my own pass rules?