Luigi Auriemma

in the last days I had the occasion to see better the gcc inline assembly and the Borland fastcall calling convension used for example in Delphi and I guess in Borland compilers too.

indeed in gcc seems to exist only the microsoft fastcall (__fastcall) and so if we want to call an external function (like a dll) which uses this strange calling convention the following "delphi_call" function can do the job:

*edit* removed because had a bug

obviously exist various ways to do this thing and are plus or less faster and plus or less complex of this one, I have preferred the probably slower but easier-to-use solution for this example moreover because "delphi_call" is only a bridge and so it's used for calling any fastcall function specifying only the location of the function.

note that I have chosen "int" as generic type of variable because on the classic win32 systems it occupies 32 bit exactly like the pointers (like "char *") so it's enough good.

well, this is only an example so any other idea or improvement are welcome.

if someone is interested in this topic it's good to know that in the next 0.3.15 version of quickbms that I will release tomorrow I will add a simple file.h with the functions for using almost any calling convention existent like Borland (the one of the topic), Watcom, OS/2 syscall, optlink and so on.

in the meantime I hope the following informations/examples could be useful:

borland fastcall/register

cdecl

stdcall

pascal

watcom

QuickBMS 0.3.15 released:
http://aluigi.org/papers.htm#quickbms

the file with all the functions is src\calling_conventions.h