Download from: http://people.redhat.com/anderson Changelog: - Fix to allow a vmlinux.bz2 file to be accepted when it is part of a relative or absolute pathname. Without the patch, the file is rejected with the message "crash: <path-to>/vmlinux.bz2: not a supported file format", although it is still possible to use it with the "-f" flag. (d.hatayama(a)jp.fujitsu.com) - Fix for the usage of a vmlinux.gz or vmlinux.bz2 file if the relevant gunzip or bunzip2 file is not located in /usr/bin. Without the patch on an Ubunutu system, the uncompression fails because those binaries are only located in the /bin directory. Also fixed the uncompression error message to differentiate between gunzip and bunzip2. (anderson(a)redhat.com) - Created a new exist_regs_in_elf_notes() function for extension modules to pre-determine whether an ELF note containing registers exists for a specified task. The function is also used by the currently-existing get_regs_from_elf_notes() function to clean up redundant code in the various get_<arch>_regs_from_elf_notes() functions that it calls. (d.hatayama(a)jp.fujitsu.com) - Exported the formerly static x86_64_exception_frame() function to extension modules, and created a new EFRAME_INIT flags argument that directs the function to fill in the x86_64 pt_regs offset table and return any errors encountered in doing so. (anderson(a)redhat.com) - Created and exported a new get_kvm_register_set() interface for extension modules to get a copy of the per-cpu registers stored in the kvmdump header. (anderson(a)redhat.com) - Fix for the handling of x86_64 compressed kdump dumpfiles where the crashing system contained more than 454 cpus. Without the patch, the crash session fails during initialization with the error message "crash: compressed kdump: invalid nr_cpus value: <cpus>" followed by "crash: vmcore: not a supported file format". (tindoh(a)redhat.com, tachibana(a)mxm.nes.nec.co.jp) - Fix for the "uvtop" and "vm -p" commands when run on tasks that have performed an mprotect(PROT_NONE) on a user-space page. Because the PAGE_PRESENT bit is not set in that case, the page was presumed to be swapped out. Without the patch the "vtop <address>" command fails with the error message "vtop: cannot determine swap location", and "vm -p" indicates "SWAP: (unknown swap location)" when iterating over the page. (d.hatayama(a)jp.fujitsu.com) - Fix for the use of the "-g vmlinux" command line option by non-root users if the /dev/crash module has been preloaded. Without the patch, after the vmlinux file's debugging information has been shown, the error messages "ERROR: Removing 'crash': Operation not permitted" and "NOTE: cleanup_memory_driver failed" are displayed. (anderson(a)redhat.com) - Fix for the s390x "bt" command to handle a program check interrupt while operating on the process stack. Without the patch, the backtrace stops prematurely upon reaching the pgm_check_handler() interrupt handler. (holzheu(a)linux.vnet.ibm.com) - Long overdue rewrite of the crash.8 man page and the associated "crash -h" built-in usage display. The crash.8 man page clarifies the required invocation options, adds all of the rarely-used command line options that have proliferated over the years, and updates the ENVIRONMENT variables section. The "crash -h" output closely mimics the relevant parts of the crash.8 man page. (anderson(a)redhat.com) - Fix for the embedded gdb module to determine member offsets of the pglist_data structure when the kernel was compiled with gcc 4.6.0. Without the patch, the system MEMORY size shown by the initial system data and by the "sys" command is nonsensical, the "kmem -n" command shows faulty memory node data, and if the kernel is configure with CONFIG_SLUB, "kmem -[sS]" will fail with numerous "kmem: page_to_nid: cannot determine node for pages: <page-address>" errors. There may be other ramifications given that the pglist_data structure is crucial to the functionality of the crash utility. (tromey(a)redhat.com) - Implemented the capability of using the NT_PRSTATUS ELF note data that is saved in version 4 compressed kdump headers to determine the starting stack and instruction pointer hooks for x86 and x86_64 backtraces when they cannot be determined in the traditional manners. (wang.chao(a)cn.fujitsu.com, wency(a)cn.fujitsu.com) - Added a new "--osrelease <dumpfile>" command line option that displays the OSRELEASE vmcoreinfo string from a kdump dumpfile. (anderson(a)redhat.com) - Fix to recognize the per-cpu symbol name change from "cpu_info" to "ia64_cpu_info" in 2.6.33 and later ia64 kernels. Without the patch, the message "WARNING: cannot find cpuinfo_ia64 location" would appear during invocation, and the "mach -c" command would fail in a similar manner, indicating "mach: cannot find cpuinfo_ia64 location". (anderson(a)redhat.com) - Fix for "kmem -[sS]" command on 2.6.39 kernels where the original slab structure members have been moved into an anonymous union. Without the patch, either command fails immediately with the error message "kmem: invalid structure member offset: slab_list". (anderson(a)redhat.com)