On Thu, 2007-07-05 at 16:55 -0500, Scott Wood wrote: > As revealed by the recent "Prevent data exception in kernel space" > patch, versions of glibc prior to 2.4[1] assume that, on powerpc32, they > can execute out of any readable mapping, regardless of whether it is > marked for execution. This happens in the elf_machine_load_address() > function.
Umm, are you sure about this? The "prevent data exception in kernel space" patch came from a test program I had that attempted to execute a page with /no permissions/ at all! I know that I used to have problems with mono making this assumption but these have since been fixed; however if I understand you correctly then you can always pre-fault the page by a read and then execute it so I don't see the point in not doing the change you suggest. johannes
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