[Crash-utility] crash version 4.0-3.9 is available

- Tentatively scheduled as base version for RHEL4-U5. - The current 2.6.18 x86_64 kernel has changed the IRQ-stack-to- process-stack linkage, where until now the link value was a pointer to the exception frame on the process stack, but has been changed to point to a location on the process stack above the exception frame. Because of that, after displaying the trace data from the IRQ stack, "bt" would then display an invalid exception frame, which was reported as a "possibly bogus exception frame". (anderson(a)redhat.com) - Also in x86_64 kernels, fix for the "bt" command. When the backtrace started on the NMI exception stack, it was displaying the correct exception frame data, but was erroneously reporting that it was a "possibly bogus exception frame". (anderson(a)redhat.com) - And again in x86_64 kernels, fix for the "bt" command. When making the transition from the IRQ stack back to the process stack, when the IRQ stack entry was made via the relatively new "call_softirq" entry point. In that case, there is no exception frame on the process stack, because it's essentially just a cross-stack call from do_softirq(). However, a bogus exception frame was being displayed, along with a "possibly bogus exception frame" message; and if the RIP value in the truly bogus exception frame happened to fall in the user virtual address range, the remainder of the process stack trace was not displayed at all. (anderson(a)redhat.com) - Fix for 2.6.18-era ia64 DISCONTIGMEM kernels, which would fail during initialization with the error message: "crash: invalid (optional) structure member offsets: pglist_data_node_next or pglist_data_pgdat_next". (anderson(a)redhat.com) - Adapted Olivier Daudel's nifty enhancement to the "struct" command, which allows the single "struct.member" argument to optionally be expressed in a "struct.member[,member,member] format, in order to display multiple members of a given structure. This also applies to the "union" and "*" commands, as all three functions have now been combined into one behind the scenes. Fixed the display for applying a minus count, and given that it opened up a the door to a number of entry errors, I also added additional error-catching/handling to avoid the display of incorrect structure data. (olivier.daudel(a)u-paris10.fr, anderson(a)redhat.com) - Fixed three sources of potential segmentation violations when using the "bt" command when the experimental dwarf CFI unwind backtrace facility was turned on. (anderson(a)redhat.com) - Added a new machdep_init(POST_VM) call, which is currently only being used by the x86_64 architecture; it calls init_unwind_table(), which has to be done after vm_init() in order to access the unwind tables of kernel modules. (anderson(a)redhat.com) Download from: http://people.redhat.com/anderson