Re: [Tinycc-devel] I need help adding custom sections to a c program

[grischka]

Simon Lehmayr wrote:
> Hello tinycc-fans,
>  
> I must add 2 custom sections to a program called myinit and mynoinit.
>  
> When I write a litte program to test that:
> int myvar __attribute__ ((aligned(8), section(".myinit")));
> void main()
> {
>   myvar=10;
>   printf("%u",myvar);
> }
> I get a exe file (windows) but it won't run. I always get a runtime 
> error when the program reaches the assignment.
> When I use cygwin's "nm" tool on the object file, I see that variable 
> myvar is at address 00000000 and location R... that's wrong.
> What must I do to make this work?
> I can compile tcc on my machine and add sections in tcc itself with 
> new_section. This didn't work yet, too.

The problem is that sections created by find_section() are non-writeable
& non-executable and also that the PE code ignores such sections except
some special ones (as .rsrc).

Here is something that might help:
  http://repo.or.cz/w/tinycc.git?a=commitdiff;h=97ac6935

--- grischka