MinGw GCC Linker Directive help

[RErasmus]

Hi all,

I want to know whether it is possible to provide an specific area of memory using the Linker Directive File.
I know this can be done using a different compiler but just not if GCC can do this.

E.g.

In default.ld

SECTION
{
  SOME_MEMORY_ADDRESS 0xFF100000 LENGTH(4) :
}

In test.c

#define RSET_CPU_REG (0xFF100000)

int main()
{
  *((unsigned int*)RSET_CPU_REG) = 0x0000003F;
  return 0;
}

Thanks, ;-)
Rudolf

[Salem]

From the gcc manual page

`section ("SECTION-NAME")'
Normally, the compiler places the objects it generates in sections
like `data' and `bss'. Sometimes, however, you need additional
sections, or you need certain particular variables to appear in
special sections, for example to map to special hardware. The
`section' attribute specifies that a variable (or function) lives
in a particular section. For example, this small program uses
several specific section names:

          struct duart a __attribute__ ((section ("DUART_A"))) = { 0 };
          struct duart b __attribute__ ((section ("DUART_B"))) = { 0 };
          char stack[10000] __attribute__ ((section ("STACK"))) = { 0 };
          int init_data __attribute__ ((section ("INITDATA")));

          main()
          {
            /* Initialize stack pointer */
            init_sp (stack + sizeof (stack));

            /* Initialize initialized data */
            memcpy (&init_data, &data, &edata - &data);

            /* Turn on the serial ports */
            init_duart (&a);
            init_duart (&b);
          }

Having given a particular variable a section name, you would then use the linker to place that section at the address you want.