VC has three calling conventions
- /Gd, the default setting, specifies the __cdecl calling convention for all functions except C++ member functions and functions marked __stdcall or __fastcall.
- /Gr specifies the __fastcall calling convention for all functions except C++ member sfunctions and functions marked __cdecl or __stdcall. All __fastcall functions must have prototypes.
- /Gz specifies the __stdcall calling convention for all functions except C++ member functions and functions marked __cdecl or __fastcall. All __stdcall functions must have prototypes.
Decorated Names for different calling conventions:
- For C, the __cdecl naming convention uses the function name preceded by an underscore ( _ ). Generally the function arguments are passed on the stack in reverse order so that the callee can access them in the correct order. The caller is responsible for popping the arguments after the function returns, which makes it possible to use the ... to send runtime defined arguments. Return values are returned in the registers.
_functionname
- For C, the __fastcall naming convention uses the function name preceded by an at sign (@) followed by the size of the function's arguments in bytes. Some of a __fastcall function's arguments are passed in registers (for x86 processors, ECX and EDX), and the rest are pushed onto the stack from right to left. The called routine pops these arguments from the stack before it returns. @function_name@number
- For C, the __stdcall naming convention uses the function name preceded by an underscore ( _ ) and followed by an at sign (@) and the size of the function's arguments in bytes. A __stdcall function's arguments are pushed onto the stack from right to left, and the called function pops these arguments from the stack before it returns. _functionname@number
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Calling Conventions supported by VC
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