Aren/NetBSD
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

work around an overflow problem in uvm_fault_wire().

Browse Source 
from Eduardo Horvath and Simon Burge.
This commit is contained in:
chs 2001-06-14 05:12:56 +00:00
parent 82b8462ccf
commit 7e00a527ea
1 changed files with 9 additions and 5 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

14
sys/uvm/uvm_fault.c
View File

@ -1,4 +1,4 @@
/* $NetBSD: uvm_fault.c,v 1.64 2001/06/02 18:09:26 chs Exp $ */
/* $NetBSD: uvm_fault.c,v 1.65 2001/06/14 05:12:56 chs Exp $ */
/*
*
@ -1798,17 +1798,22 @@ uvm_fault_wire(map, start, end, access_type)
vm_prot_t access_type;
{
vaddr_t va;
pmap_t pmap;
int error;
pmap = vm_map_pmap(map);
/*
* now fault it in a page at a time. if the fault fails then we have
* to undo what we have done. note that in uvm_fault VM_PROT_NONE
* is replaced with the max protection if fault_type is VM_FAULT_WIRE.
*/
/*
* XXX work around overflowing a vaddr_t. this prevents us from
* wiring the last page in the address space, though.
*/
if (start > end) {
return EFAULT;
}
for (va = start ; va < end ; va += PAGE_SIZE) {
error = uvm_fault(map, va, VM_FAULT_WIRE, access_type);
if (error) {
@ -1818,7 +1823,6 @@ uvm_fault_wire(map, start, end, access_type)
return error;
}
}
return 0;
}