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Fix pmap_extract so that it doesn't panic if the user types

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'cat /proc/pid/map'

Submitted by: Arun Sharma <arun.sharma@intel.com>
This commit is contained in:
Doug Rabson 2003-01-24 09:58:32 +00:00
parent 628edf0f9b
commit 388dc84194
1 changed files with 10 additions and 3 deletions
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13
sys/ia64/ia64/pmap.c
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@ -1172,13 +1172,20 @@ pmap_extract(pmap, va)
register pmap_t pmap;
vm_offset_t va;
{
struct ia64_lpte *pte;
pmap_t oldpmap;
vm_offset_t pa;
if (!pmap)
return 0;
oldpmap = pmap_install(pmap);
pa = ia64_tpa(va);
pte = pmap_find_vhpt(va);
pmap_install(oldpmap);
return pa;
if (!pte)
return 0;
return pmap_pte_pa(pte);
}
/***************************************************