Re: [Crash-utility] Check _PAGE_PROTNONE bit in uvtop()

Currently, some of uvtop() functions on x86, x86_64 and ia64 lacks checking whether in pte _PAGE_PROTNONE bit is set or not. The flag is set to pte when specifying to the corresponding memory space PROT_NONE using mprotect(), and then _PAGE_PRESENT bit in the pte is unset in order to make hardware cause segmentation fault intensionally. Important is the fact that besides _PAGE_PRESENT set, _PAGE_PROTNONE indicates the page is present (not swapped out). The architectures fixed are x86, x86_64 and ia64 except for Xen. The patchset based on crash 5.1.4 consists of 5 patches, which are divided into the ones extending machine dependent data on x86 and x86_64, and the ones actually adding _PAGE_PROTNONE checking into each uvtop(). defs.h | 6 ++++-- ia64.c | 6 +++--- x86.c | 10 ++++++++-- x86_64.c | 11 +++++++++-- 4 files changed, 24 insertions(+), 9 deletions(-)