[kaffe] Question about function 'sysdepCallMethod'

[Guilhem Lavaux]

Hi,

sysdepCallMethod is not simply this. It ensures that the arguments are 
passed correctly according to the ABI for some architecture/os/compiler 
combination. Generally it must be written in assembly or using some 
tricks of the compiler. sysdepCallMethod takes a pointer to some 
function, its arguments and then build a function call and finally call 
it. Once the function returns, the returned value is taken from the 
stack/registers and pushed into the return value memory.

Regards,

Guilhem.

qi fenghai wrote:
> Hi all, Please advise if 'sysdepCallMethod' can be implemented by this 
> way as bellow:
> 
> method 1:
>  in JVM:
>     typedef int (*FUNCTYPE)();  //function's return type is int
>     FUNCTYPE *nativefunc = (FUNCTYPE)dlsym(handle, "foo");
>         //four argument
>     (*nativefunc)(1, 2.5);
> 
>  in share library:
>     int foo(int, double);
> 
> method 2:
>  in JVM:
>     typedef int (*FUNCTYPE)(...);  //function's return type is int, 
> argument list is '...'
>     FUNCTYPE *nativefunc = (FUNCTYPE)dlsym(handle, "foo");
>         //four argument
>     (*nativefunc)(1, 2.5);
> 
>  in share library:
>     int foo(int, double);
> 
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