I32 call_sv(SV* sv, I32 flags);
I32 call_pv(char *subname, I32 flags);
I32 call_method(char *methname, I32 flags);
I32 call_argv(char *subname, I32 flags, char **argv);

I32 call_argv(char *subname, I32 flags, int numOfArgs, SV* a, SV* b, SV *c ...);

PUSHMARK(SP);
mPUSHi(some_integer);
mPUSHp(binary_data, len);
XPUSHs(some_SV_I_had_laying_around);
PUTBACK;
call_pv("sub_name", G_DISCARD);