Messages in this thread | | | Subject | Re: make PROT_WRITE imply PROT_READ | From | Alan Cox <> | Date | Fri, 30 Jun 2006 13:20:59 +0100 |
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Ar Gwe, 2006-06-30 am 10:35 +0200, ysgrifennodd Arjan van de Ven: > apps like JVM's forgot PROT_EXEC and break when the hardware enforces it > apps that forget PROT_READ break when the kernel/hardware enforce it > > not too much difference....
There is quite a difference. The _EXEC case behaves predictably for the platforms that support it. At least I am not aware of cases that is not true. The _READ case without the fault handling patch behaves unpredictably depending on the precise ordering of events on a clean page.
Alan
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