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Differential D15102 Diff 41584 head/sys/mips/mips/trap.c

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head/sys/mips/mips/trap.c

Show First 20 Lines • Show All 678 Lines • ▼ Show 20 Lines kernel_fault:
/* /*
* It is an error for the kernel to access user space except * It is an error for the kernel to access user space except
* through the copyin/copyout routines. * through the copyin/copyout routines.
*/ */
if (td->td_pcb->pcb_onfault == NULL) if (td->td_pcb->pcb_onfault == NULL)
goto err; goto err;
/* check for fuswintr() or suswintr() getting a page fault */
/* XXX There must be a nicer way to do this. */
if (td->td_pcb->pcb_onfault == fswintrberr) {
pc = (register_t)(intptr_t)td->td_pcb->pcb_onfault;
td->td_pcb->pcb_onfault = NULL;
return (pc);
}
goto dofault; goto dofault;
case T_TLB_LD_MISS + T_USER: case T_TLB_LD_MISS + T_USER:
ftype = VM_PROT_READ; ftype = VM_PROT_READ;
goto dofault; goto dofault;
case T_TLB_ST_MISS + T_USER: case T_TLB_ST_MISS + T_USER:
ftype = VM_PROT_WRITE; ftype = VM_PROT_WRITE;
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