From: Vince Weaver <vince@csl.cornell.edu>
To: qemu-devel@nongnu.org
Subject: [Qemu-devel] another 64/32 mmap() bug
Date: Sat, 27 Sep 2008 18:28:30 -0400 (EDT) [thread overview]
Message-ID: <20080927182454.A29159@stanley.csl.cornell.edu> (raw)
In trying to get the remaining spec2k/spec2k6 benchmarks to run, I've
found another 64-bit/32-bit mmap() linux-user problem.
This could be a kernel problem.
The mmap() call in conjunction with MAP_32BIT will make sure the address
of an allocation is < 32-bit. The problem is it doesn't check that the
_entire address range_ is < 32-bit.
So it will return an address of say 0xffff0000 for an allocation of
128kB, and the end of that allocation will not be addressable, causing
a segfault.
Vince
next reply other threads:[~2008-09-27 22:28 UTC|newest]
Thread overview: 2+ messages / expand[flat|nested] mbox.gz Atom feed top
2008-09-27 22:28 Vince Weaver [this message]
2008-09-28 19:11 ` [Qemu-devel] another 64/32 mmap() bug Vince Weaver
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