d/freebsd-dev
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

Only handle copyin/out/etc faults when not in an interrupt handler.

Browse Source 
This makes unexpected faults (in an interrupt handler) more likely
to crash properly.  It could be done even better (more robustly and
more efficiently) using lazy fault handling.
This commit is contained in:
Bruce Evans 1996-12-18 19:12:01 +00:00
parent 115abf2097
commit 959c02787e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=20651
3 changed files with 27 additions and 24 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

17
sys/amd64/amd64/trap.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
* $Id: trap.c,v 1.82 1996/09/01 10:10:12 davidg Exp $
* $Id: trap.c,v 1.83 1996/09/10 08:32:01 bde Exp $
*/
/*
@ -350,10 +350,10 @@ trap(frame)
doreti_popl_ds_fault);
MAYBE_DORETI_FAULT(doreti_popl_es,
doreti_popl_es_fault);
}
if (curpcb && curpcb->pcb_onfault) {
frame.tf_eip = (int)curpcb->pcb_onfault;
return;
if (curpcb && curpcb->pcb_onfault) {
frame.tf_eip = (int)curpcb->pcb_onfault;
return;
}
}
break;
@ -493,7 +493,8 @@ trap_pfault(frame, usermode)
if (p == NULL ||
(!usermode && va < VM_MAXUSER_ADDRESS &&
(curpcb == NULL || curpcb->pcb_onfault == NULL))) {
(intr_nesting_level != 0 || curpcb == NULL ||
curpcb->pcb_onfault == NULL))) {
trap_fatal(frame);
return (-1);
}
@ -550,7 +551,7 @@ trap_pfault(frame, usermode)
return (0);
nogo:
if (!usermode) {
if (curpcb && curpcb->pcb_onfault) {
if (intr_nesting_level == 0 && curpcb && curpcb->pcb_onfault) {
frame->tf_eip = (int)curpcb->pcb_onfault;
return (0);
}
@ -645,7 +646,7 @@ trap_pfault(frame, usermode)
return (0);
nogo:
if (!usermode) {
if (curpcb && curpcb->pcb_onfault) {
if (intr_nesting_level == 0 && curpcb && curpcb->pcb_onfault) {
frame->tf_eip = (int)curpcb->pcb_onfault;
return (0);
}

17
sys/i386/i386/trap.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
* $Id: trap.c,v 1.82 1996/09/01 10:10:12 davidg Exp $
* $Id: trap.c,v 1.83 1996/09/10 08:32:01 bde Exp $
*/
/*
@ -350,10 +350,10 @@ trap(frame)
doreti_popl_ds_fault);
MAYBE_DORETI_FAULT(doreti_popl_es,
doreti_popl_es_fault);
}
if (curpcb && curpcb->pcb_onfault) {
frame.tf_eip = (int)curpcb->pcb_onfault;
return;
if (curpcb && curpcb->pcb_onfault) {
frame.tf_eip = (int)curpcb->pcb_onfault;
return;
}
}
break;
@ -493,7 +493,8 @@ trap_pfault(frame, usermode)
if (p == NULL ||
(!usermode && va < VM_MAXUSER_ADDRESS &&
(curpcb == NULL || curpcb->pcb_onfault == NULL))) {
(intr_nesting_level != 0 || curpcb == NULL ||
curpcb->pcb_onfault == NULL))) {
trap_fatal(frame);
return (-1);
}
@ -550,7 +551,7 @@ trap_pfault(frame, usermode)
return (0);
nogo:
if (!usermode) {
if (curpcb && curpcb->pcb_onfault) {
if (intr_nesting_level == 0 && curpcb && curpcb->pcb_onfault) {
frame->tf_eip = (int)curpcb->pcb_onfault;
return (0);
}
@ -645,7 +646,7 @@ trap_pfault(frame, usermode)
return (0);
nogo:
if (!usermode) {
if (curpcb && curpcb->pcb_onfault) {
if (intr_nesting_level == 0 && curpcb && curpcb->pcb_onfault) {
frame->tf_eip = (int)curpcb->pcb_onfault;
return (0);
}

17
sys/kern/subr_trap.c
View File

@ -35,7 +35,7 @@
* SUCH DAMAGE.
*
* from: @(#)trap.c 7.4 (Berkeley) 5/13/91
* $Id: trap.c,v 1.82 1996/09/01 10:10:12 davidg Exp $
* $Id: trap.c,v 1.83 1996/09/10 08:32:01 bde Exp $
*/
/*
@ -350,10 +350,10 @@ trap(frame)
doreti_popl_ds_fault);
MAYBE_DORETI_FAULT(doreti_popl_es,
doreti_popl_es_fault);
}
if (curpcb && curpcb->pcb_onfault) {
frame.tf_eip = (int)curpcb->pcb_onfault;
return;
if (curpcb && curpcb->pcb_onfault) {
frame.tf_eip = (int)curpcb->pcb_onfault;
return;
}
}
break;
@ -493,7 +493,8 @@ trap_pfault(frame, usermode)
if (p == NULL ||
(!usermode && va < VM_MAXUSER_ADDRESS &&
(curpcb == NULL || curpcb->pcb_onfault == NULL))) {
(intr_nesting_level != 0 || curpcb == NULL ||
curpcb->pcb_onfault == NULL))) {
trap_fatal(frame);
return (-1);
}
@ -550,7 +551,7 @@ trap_pfault(frame, usermode)
return (0);
nogo:
if (!usermode) {
if (curpcb && curpcb->pcb_onfault) {
if (intr_nesting_level == 0 && curpcb && curpcb->pcb_onfault) {
frame->tf_eip = (int)curpcb->pcb_onfault;
return (0);
}
@ -645,7 +646,7 @@ trap_pfault(frame, usermode)
return (0);
nogo:
if (!usermode) {
if (curpcb && curpcb->pcb_onfault) {
if (intr_nesting_level == 0 && curpcb && curpcb->pcb_onfault) {
frame->tf_eip = (int)curpcb->pcb_onfault;
return (0);
}