Download from: http://people.redhat.com/anderson Changelog: - Fixes for gdb-7.0 ppc64/ppc-specific files to handle gcc-4.6 compiler failures. Without the patch, gcc-4.6 generates "error: variable ‘<variable>’ set but not used [-Werror=unused-but-set-variable]" fatal errors when the (default) -Werror flag is used. Previous gcc versions considered local variables were simply set to some value to be "used", but that is no longer the case. (anderson(a)redhat.com) - Add support for the "bt" command to recognize the new s390x "restart_stack" used by the PSW restart interrupt in 3.0.1 and later kernels. (holzheu(a)linux.vnet.ibm.com) - Enhancement to the s390x "bt" command to display the register contents of the pt_regs strucutre for interrupts, instead of just printing the string "- Interrupt -". The pt_regs structure contains all of the current registers and PSW of the interrupted CPU. (holzheu(a)linux.vnet.ibm.com) - Removed the "files -l" option, which does not support 2.6 or later kernels, and because it requires structure offset data that can only be determined if the "lockd" and "nfsd" modules have been built into the kernel. Given the kernel module dependencies, the command is more suitable as an extension module, if anyone cares to carry on its legacy. (anderson(a)redhat.com) - Fix for the "ps" command to disallow the mutually-exclusive "-u" and "-k" options from being entered together. Without the patch, whichever of the two options was entered last was acted upon. Also, the help page was clarified by separating the three process identifier formats from the "-u", "-k" and "-G" qualifiers. (anderson(a)redhat.com) - Fix for the "ps" command to disallow the mutually-exclusive "-a", "-t", "-c", "-p", "-g", "-l" and "-r" options from being entered together. Without the patch, whichever of the seven options that was entered last was acted upon. - Added new "struct -[xd]" and "union -[xd]" options, which override the current default output format with hexadecimal or decimal format for just the command instance. The "-o" member offset values and the structure size value are also controlled by the new options. Without the patch, it would require changing the default output format with "hex" or "dec" prior to executing the "struct" or "union" command. (anderson(a)redhat.com) - Fix for the "fuser" command, which may occasionally precede its output with the message "WARNING: FILE_NRHASH has changed from 32" on 2.6.19 and later kernels. The message is harmless. (anderson(a)redhat.com) - Exported new set_temporary_radix() and restore_current_radix() functions, which are used to temporarily override the current output radix setting. (anderson(a)redhat.com) - Fixes for ARM gdb-7.0/bfd/elf32-arm.c file to handle gcc-4.6 compiler failures. Without the patch, gcc-4.6 generates "error: variable ‘<variable>’ set but not used [-Werror=unused-but-set-variable]" fatal errors when the (default) -Werror flag is used. Previous gcc versions considered local variables were simply set to some value to be "used", but that is no longer the case. (anderson(a)redhat.com) - Cosmetic fix for command-failure "Usage" messages to prevent the output from exceeding 80 columns. (anderson(a)redhat.com) - Implemented a new "struct -p" option which can be used to dereference pointer members and display the target data. The option can be used with the struct_name.member[,member] format, or if not, all pointers in the structure will be dereferenced. If the member is a pointer, the member's data type will be prepended to the member name when displaying the target address; on the subsequent line(s) the target's symbol name will be displayed in brackets if appropriate, and if possible, the target data will be displayed. For example, currently to display an mm_struct's "pgd" member: crash> mm_struct.pgd ffff810022e7d080 pgd = 0xffff81000e3ac000 crash> The -p option shows the data type of "pgd", dereferences the pointer value, and with -x, displays the target's contents in hexadecimal regardless of the current output format: crash> mm_struct.pgd ffff810022e7d080 -px pgd_t *pgd = 0xffff81000e3ac000 -> { pgd = 0x2c0a6067 } crash> Here the "thread_info" and "binfmt" members of a task_struct are dereferenced and the targets displayed: crash> task_struct.thread_info,binfmt ffff8100181190c0 -p struct thread_info *thread_info = 0xffff810023c06000 -> { task = 0xffff8100181190c0, exec_domain = 0xffffffff802f78e0, flags = 128, status = 1, cpu = 3, preempt_count = 0, addr_limit = { seg = 18446604435732824064 }, restart_block = { fn = 0xffffffff80095a52 <do_no_restart_syscall>, arg0 = 0, arg1 = 0, arg2 = 0, arg3 = 0 } } struct linux_binfmt *binfmt = 0xffffffff80305540 -> <elf_format> { next = 0xffffffff80305500, module = 0x0, load_binary = 0xffffffff80017d99 <load_elf_binary>, load_shlib = 0xffffffff800838c3 <load_elf_library>, core_dump = 0xffffffff80086465 <elf_core_dump>, min_coredump = 4096 } crash> When a .member is not specified, all pointers in the structure are dereferenced, which may be quite verbose depending upon the structure. (anderson(a)redhat.com) - Implemented support for "SADUMP" dumpfiles, which are created by the Fujitsu Stand Alone Dump facility. The dump-creation mechanism is based in hardware-specific firmware, generating a dumpfile in three different formats: sadump dump device (single partition), sadump dump device (disk set), and archive file formats. The crash utility recognizes all three formats. (d.hatayama(a)jp.fujitsu.com) - Fix for the "bt" command to display Control registers 8-15 (s390x and s390) and floating point registers 8-15 (s390x only) correctly. Without the patch, the register content was copied from the wrong location of the save area, and the wrong register values were displayed for the active tasks. (holzheu(a)linux.vnet.ibm.com) - Fix for 2.6.34 ppc64 kernels, which were changed to dynamically allocate the paca structure, and changed the data type of "paca" symbol from array to a paca_struct pointer. (mahesh(a)linux.vnet.ibm.com) - Fix for 2.6.36 and later ppc64 kernels, which overwrite the paca pointer variable to point to a static paca during a crash sequence just prior to the kexec of the secondary kernel, which contains a paca_struct.data_offset value that is valid only for crashing cpu. However, the kernel change also re-introduced the __per_cpu_offset array, which had been removed in 2.6.15, which will be used as an alternative to the per-cpu paca_struct. (mahesh(a)linux.vnet.ibm.com) - The new version of makedumpfile, 1.4.0, contains a facility that allows a user to filter out kernel data (e.g., security keys, confidential/secret information, etc.) from a vmcore. The data that is filtered out is poisoned with character 'X' (0x58). A filtered ELF kdump vmcore now contains a new "ERASEINFO" ELF note section that contains the filter data strings used by makedumpfile. A filtered compressed kdump has a header version number 5, and contains new offset_eraseinfo and size_eraseinfo members in its sub-header that point to a copy of the filter data strings. In most cases, the erased kernel data will be inconsequential to the crash session, but it is certainly possible that the removal of crucial kernel data that the crash utility needs may cause the crash session to fail, cause individual commands to fail, or result in other unpredictable runtime behaviour. This patch detects whether kernel data has been erased from the dumpfile, and if so, displays an early warning message alerting the user. The "help -n" command displays the filter data strings that were used by makedumpfile. (mahesh(a)linux.vnet.ibm.com)