[ARM] BE8 support in relocations

[Christophe LYON <christophe dot lyon at st dot com>]

Hello,

I am confused by the way elf32_arm_final_link_relocate handles reading 
and writing according to the endianness.

Indeed, in ARM's BE8 mode, data and code have different endianness, but 
this function uses bfd_get_XX and bfd_put_XX which don't take this into 
account.

For instance, it begins with
addend = bfd_get_32 (input_bfd, hit_data) & howto->src_mask;
which reads the right value in -BE and -LE but not in -BE8 in case the 
current reloc operates on a branch instruction (because it's encoded 
within code, in LE, but bfd_get_32 will read it in BE).

Is this a bug or am I missing something?

Thanks,

Christophe.