On 02/12/2014 10:36 AM, Qiaowei Ren wrote: > An access to an invalid bound directory entry will cause a #BR > exception. This patch hook #BR exception handler to allocate > one bound table and bind it with that buond directory entry. > > This will avoid the need of forwarding the #BR exception > to the user space when bound directory has invalid entry. > > Signed-off-by: Qiaowei Ren <[email protected]> > --- > +void do_mpx_bt_fault(struct xsave_struct *xsave_buf) > +{ > + unsigned long status; > + unsigned long bd_entry, bd_base; > + unsigned long bd_size = 1UL << (MPX_L1_BITS+MPX_L1_SHIFT); > + > + bd_base = xsave_buf->bndcsr.cfg_reg_u & MPX_BNDCFG_ADDR_MASK; > + status = xsave_buf->bndcsr.status_reg; > + > + bd_entry = status & MPX_BNDSTA_ADDR_MASK; > + if ((bd_entry >= bd_base) && (bd_entry < bd_base + bd_size)) > + allocate_bt(bd_entry); > +}
This still just loops on failure, right? --Andy -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to [email protected] More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
