Access linker symbol from .C file

I'm trying to access a linker symbol from my C file. The idea is to find out where the end of my code and R/O memory is in flash so I can use the remainder for storage. I have the following in my .c file:

.C file:

extern int __ram_rodata_end;

void *p = &__ram_rodata_end;

The .map file shows the symbol __ram_rodata_end like this:

0x01014f20 PROVIDE (__ram_rodata_end, <code 336> (.))

But the linker gives me the error below. If I use a symbol that&#39;s in reach (e.g. __sbss_end) everything works and p points to the end of data. The format in the map file is exactly the same so I know that&#39;s not the problem.

Linker error:

../test.c:33: Unable to reach __ram_rodata_end (at 0x01014f20) from the global pointer (at 0x0101ed34) because the offset (-40468) is out of the allowed range, -32678 to 32767.

Here&#39;s the assembly code causing the problem:

145 0100 040080D0 addi r2,gp,%gprel(__ram_rodata_end)

146 0104 150680E0 stw r2,24(fp)

Is there an easy way of getting the value of a linker symbol into a C variable? I&#39;m not above using inline assembly with a global or static variable to get the value.

Thanks,

Andrew