Re: Variables in linker script

[Dave Korn <dave dot korn dot cygwin at gmail dot com>]

On 22/09/2010 13:22, Nikola Ikonic wrote:

> thanks for your replies. Dave, would it be possible to create a
> preprocessor file which would create linker scripts which do some kind
> of arithmetics with variables? I made an example with OR = 0x40132d00;
> 
> but what if would have
> 
> LEN = 0x5000;
> OR = 0x40132d00;
> End = OR+LEN;
> 
> MEMORY
> {
>  /*These commands describe block locations (execution area)*/
>  MODULE2      : ORIGIN = OR, LENGTH = END;
> }"
> 
> Or there could be some other kind of arithmetics (multiplying etc).

  LD can parse expressions just fine, just so long as all the symbols are
defined as constants, so

#define LEN 0x5000
#define OR  0x40132d00
#define END (LEN + OR)

MEMORY
{
  /*These commands describe block locations (execution area)*/
  MODULE2      : ORIGIN = OR, LENGTH = END;
}

... ought to do what you want, I think.

    cheers,
      DaveK