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page_check_range: fix wrap around test (Lauro Ramos Venancio). 

Move up the warp around test because line
'end = TARGET_PAGE_ALIGN(start+len);'
can interfere with it.


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@5563 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
balrog 2008-10-28 10:24:11 +00:00
parent d732dcb442
commit 55f280c90e
1 changed files with 4 additions and 3 deletions
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7
exec.c
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@ -2081,12 +2081,13 @@ int page_check_range(target_ulong start, target_ulong len, int flags)
target_ulong end;
target_ulong addr;
if (start + len < start)
/* we've wrapped around */
return -1;
end = TARGET_PAGE_ALIGN(start+len); /* must do before we loose bits in the next step */
start = start & TARGET_PAGE_MASK;
if( end < start )
/* we've wrapped around */
return -1;
for(addr = start; addr < end; addr += TARGET_PAGE_SIZE) {
p = page_find(addr >> TARGET_PAGE_BITS);
if( !p )