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clear pcb_onfault before calling uvm_fault() and restore it afterward. 

if the fault handler generates a pagefault, we'd like to panic rather
than invoking the onfault handler.
This commit is contained in:
chs 2003-10-25 16:31:39 +00:00
parent 359e5c8c2e
commit cac49e5cf0
1 changed files with 7 additions and 2 deletions
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9
sys/arch/powerpc/powerpc/trap.c
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@ -1,4 +1,4 @@
/* $NetBSD: trap.c,v 1.92 2003/10/22 17:29:18 matt Exp $ */
/* $NetBSD: trap.c,v 1.93 2003/10/25 16:31:39 chs Exp $ */
/*
* Copyright (C) 1995, 1996 Wolfgang Solfrank.
@ -32,7 +32,7 @@
*/
#include <sys/cdefs.h>
__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.92 2003/10/22 17:29:18 matt Exp $");
__KERNEL_RCSID(0, "$NetBSD: trap.c,v 1.93 2003/10/25 16:31:39 chs Exp $");
#include "opt_altivec.h"
#include "opt_ddb.h"
@ -81,6 +81,7 @@ trap(struct trapframe *frame)
struct proc *p = l ? l->l_proc : NULL;
struct pcb *pcb = curpcb;
struct vm_map *map;
struct faultbuf *onfault;
ksiginfo_t ksi;
int type = frame->exc;
int ftype, rv;
@ -153,7 +154,11 @@ trap(struct trapframe *frame)
else
ftype = VM_PROT_READ;
onfault = pcb->pcb_onfault;
pcb->pcb_onfault = NULL;
rv = uvm_fault(map, trunc_page(va), 0, ftype);
pcb->pcb_onfault = onfault;
if (map != kernel_map) {
/*
* Record any stack growth...