what's the right way to use custom entry point

[Cong Monkey]

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@deneb.enyo.de>:
> * 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.