Tks for your advice:) Another question: What's the easy way to self get (int argc, char** argv) for self entry point! I use a not so elegant way like: https://gist.github.com/congzhangzh/5141f1c4de4e7ac85d6f8d6a630207e7 2016-10-26 4:09 GMT+08:00 Florian Weimer <fw@xxxxxxxxxxxxx>: > * Cong Monkey: > >> Hi, >> >> I want use custom entry point, but it's very strange! >> >> entry_point_test.c file: >> >> int sayhello(int argc, char** argv) >> { >> return 0; >> } > >> if I do: >> cc ../entry_point_test.c -o entry_point_test -Wl,-esayhello >> -nostartfiles #cc works >> ./a.out >> then I get: >> # Segmentation fault >> >> anyone can help what should I do? > > It depends on the system. In general, the entry point function must > not return because there is nothing to return to. In general, you > need to perform a system call to terminate the process. > > I checked your example on Linux, and it works. The crash happens > after the function returns.
