TRAP_TRACE
send_user_sigtrap(TRAP_TRACE);
DEFINE(LTRAP_TRACE, TRAP_TRACE);
si_code = TRAP_TRACE;
force_sig_fault_to_task(SIGTRAP, TRAP_TRACE,
handle_gdb_break(regs, TRAP_TRACE);
_exception(SIGTRAP, regs, TRAP_TRACE, regs->nip);
_exception(SIGTRAP, regs, TRAP_TRACE, regs->nip);
force_sig_fault(SIGTRAP, TRAP_TRACE, (void __user *)regs->nip);
return TRAP_TRACE;