Re: Startup function before main.

["Steve Graegert" <graegerts@gmail.com>]

On 3/27/06, krishna.vamsi@wipro.com <krishna.vamsi@wipro.com> wrote:
> Hi List,
>
> Before Executing the main function, a startup routine will be executed
> which will set up the initial environment for the process.
>
> This Startup routine will be supplied by the kernel and linked by the
> Linker. My question is : Can we add one more startup routine before
> executing the main program, if yes how??

No, not programmatically, only by patching the executable or object file.
You can call other functions from within the constructor:

	void __attribute__ ((constructor)) my_ctor() {
		int i = my_func();
	}

You should not need a second constructor.  Who shall decide which one
comes first and how should it be done?

	\Steve