We have
asmlinkage void user_unaligned_trap(struct pt_regs *regs, unsigned int insn)
{
enum direction dir;
if(!(current->thread.flags & SPARC_FLAG_UNALIGNED) ||
(((insn >> 30) & 3) != 3))
goto kill_user;
there, followed by some work on emulating the insn. So while the default
behaviour is to hit the process with SIGBUS, it can overridden by setting
SPARC_FLAG_UNALIGNED in current->thread.flags. Fair enough, but... Just
what could possibly set that flag?
That stuff had been introduced back in 2.1.9 and even there (or through
the 2.2, etc.) I don't see anything that would ever set it.
Am I missing something, or had it really been dead code all along?
