On Wed, Jun 13, 2012 at 8:51 AM, Jonathan Wakely <jwakely.gcc@xxxxxxxxx> wrote: > On Jun 13, 2012 11:56 AM, "Xin Tong" wrote: >> >> Function pointers can be used to call functions in C. but for C++ >> member functions. A special function pointer needs to be used, i.e. >> >> float (SomeClass::*my_memfunc_ptr)(int, char *); >> >> but eventually, my_memfunc_ptr will hold the address of the code of >> the function it points to. can i set up the calling context myself at >> this point, i.e. put "this" pointer into rdi, put the arguments into >> other registers/stacks and jump to the address held in the >> my_memfunc_ptr. would this work in gcc compiled code , what about >> other compilers and os linkages ? > > Have you seen http://gcc.gnu.org/onlinedocs/gcc/Bound-member-functions.html ? Ok. did not know that before. it seems member functions are callable with instruction address. especially with PMF enabled. one can take the address without an object. Thanks Xin
