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

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if the fault handler generates a pagefault, we'd like to panic rather
than invoking the onfault handler.
This commit is contained in:
chs 2001-02-05 11:12:05 +00:00
parent a1c22f6d67
commit 755889bc0b
1 changed files with 5 additions and 1 deletions
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6
sys/arch/i386/i386/trap.c
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@ -1,4 +1,4 @@
/* $NetBSD: trap.c,v 1.153 2000/12/11 05:29:00 mycroft Exp $ */
/* $NetBSD: trap.c,v 1.154 2001/02/05 11:12:05 chs Exp $ */
/*-
* Copyright (c) 1998, 2000 The NetBSD Foundation, Inc.
@ -172,6 +172,7 @@ trap(frame)
IDTVEC(osyscall)[];
struct trapframe *vframe;
int resume;
caddr_t onfault;
uvmexp.traps++;
@ -403,7 +404,10 @@ trap(frame)
}
/* Fault the original page in. */
onfault = p->p_addr->u_pcb.pcb_onfault;
p->p_addr->u_pcb.pcb_onfault = NULL;
rv = uvm_fault(map, va, 0, ftype);
p->p_addr->u_pcb.pcb_onfault = onfault;
if (rv == KERN_SUCCESS) {
if (nss > vm->vm_ssize)
vm->vm_ssize = nss;