xtensa-fsf-ld: dangerous relocation: call8: call target out of range

[nick clifton]

Hi Max,
> net/built-in.o: In function `fib_net_init':
> fib_frontend.c:(.init.text+0x1553): dangerous relocation: call8: call
> target out of range: (.text+0x3eb38)

> If I add --no-relax ld option to this link step everything works fine.
>
> Referenced portion of the object file (net/built-in.o) looks like this:
>
>      1550:       180000          l32r    a8, fffc1550
> <unregister_net_sysctl_table+0xfff6eb90>
>                          1550: R_XTENSA_SLOT0_OP .init.literal+0x5a0
>                          1550: R_XTENSA_ASM_EXPAND       fib_trie_table
>      1553:       0b8000          callx8  a8
>      1556:       caa3            beqz.n  a10, 157d <fib_net_init+0x5d>
>
> Can anybody suggest the way to debug/fix it?

Take a look at bfd/elf32-xtensa.c.  In particular the relax_section() 
function. (Compiling with "#define DEBUG 1" might help).

It looks like linker relaxation on the xtensa is quite extensive 
however, so you may have some trouble narrowing down the exact bug.  You 
could try contacting Sterling Augustine, the Xtensa maintainer for more 
help.  You might also wish to file a binutils bug report on the problem 
(at http://sourceware.org/bugzilla/), althpugh if you do this it would 
be really useful if you can include a small test case to reproduce the 
problem.

Cheers
   Nick