Basics

Calling conventions

• Thiscall

  • microsoft 32bit c++ specific

  • this pointer in ECX, rest of arguments on the stack

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• fastcall

  • The first 4 arguments are stored in registers, the rest on the stack

    • windows uses the registers RCX, RDX, r8 and r9

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• stdcall

  • used by 32bit windows.

  • arguments are pused in reverse order onto the stack.

  • the callee cleans up the stack (arguments)

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• cdecl

  • used by 32bits *nix

  • same as stdcall but the caller cleans up the stack

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