Linker (NIOS2-ELF-LD) help requested

NetJohn,

> For one part of it, we need to fix a constant structure at a known

> location in Flash.

There are several ways you can do this. One way is to

place the data in it's own section. E.g.:

C Language:

struct foo bar __attribute__ ((section (".fixed.struct"))) = { 0 };

Then locate it at a fixed address with an output section in

your linker command file. E.g., put the struct at 0xffff0000:

.fixed.struct 0xffff0000 :
{
    *(.fixed.struct)
}

Another way (which I prefer) is to put the struct definition

in it's _own_ C module. E.g.: in module foo.c:

struct foo bar =  {some initialized data };

Then locate module's .data section at a fixed address with an

output section in your linker command file. E.g.:

.fixed.struct 0xffff0000 :
{
    foo.o (.data)
}

If the data isn't initialized use .bss.

> Can anyone point me in the right direction?

A little dated, but most of the good stuff hasn't changed

much:

http://www.gnu.org/software/binutils/manua...d-2.9.1/ld.html (http://www.gnu.org/software/binutils/manual/ld-2.9.1/ld.html)

Or try use info ld on a linux system.

> The linker is GNU-based, correct?

Yes.

> So GNU's LD docs should be applicable?

Yes.

Regards,

--Scott