On 12/18/2012 12:37 PM, Andy Lutomirski wrote:
There is no introduce of new fix address. There are still there for
x86_64. If this will currently not a major problem on this architecture
than it will not for x86_32 too.
Not necessarily true. On x86-64 (non-compat) the fixmap address is in
kernel space (high bit set), so it can't conflict with anything in
user space. On true 32-bit mode, the same applies. In compat mode,
the fixed address is in *user* space and might conflict with existing
uses.
The other bit is that the fixmap isn't actually fixed on 32 bits, which
creates its own set of problems. As such, I really would prefer a
properly PIC solution.
-hpa
--
H. Peter Anvin, Intel Open Source Technology Center
I work for Intel. I don't speak on their behalf.
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