1:31 p.m.
Download from: http://people.redhat.com/anderson
Changelog:
- Fixed the compressed kdump panic task determination function to use
the kernel's "crashing_cpu" symbol if it exists. Without the patch,
the function returned 0 because it was using diskdump-specific header
variables that are always set to zero in compressed kdump dumpfiles;
the panic task was then found by searching the kernel stacks of all
of the active tasks.
(anderson(a)redhat.com)
- Fix for the potential of false-positive warning messages during the
initialization of s390x zdump dumpfiles that would indicate either
"WARNING: multiple active tasks have called die and/or panic" and/or
"WARNING: multiple active tasks have called die".
(holzheu(a)linux.vnet.ibm.com)
- Removal of superfluous code for gathering registers from the ELF
header in the ARM get_netdump_regs_arm() function.
(per.fransson.ml(a)gmail.com)
- Additional fixes for the ARM architecture gdb-7.0/bfd/elf32-arm.c and
gdb-7.0/bfd/cpu-arm.c 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)
- Added new "dis -[xd]" options, which override the current default
output format with hexadecimal or decimal format for just the command
instance. Without the patch, it would require changing the default
output format with "hex" or "dec" prior to executing
"dis".
(anderson(a)redhat.com)
- Added new "task -[xd]" options, which override the current default
output format with hexadecimal or decimal format for just the command
instance. Without the patch, it would require changing the default
output format with "hex" or "dec" prior to executing
"task". The
new flags may be used with "foreach task" as well.
(anderson(a)redhat.com)
- Prevent the "struct -[xd]", "union -[xd]", and "p -[xd]"
commands
from allowing both options being entered on the command line.
(anderson(a)redhat.com)
- Fixes to top-level crash source files filesys.c, memory.c, netdump.c,
sadump.c, symbols.c, x86.c and lkcd_x86_trace.c to allow them to be
compiled cleanly with gcc-4.6. Without the patch, gcc-4.6 generates
fatal errors indicating "error: variable ‘<variable>’ set but not
used [-Werror=unused-but-set-variable]" when building crash with
"make Warn", or generates similar warning messages when building with
"make warn". This has been tested only on x86, x86_64 and ARM; the
other architectures may still generate errors/warnings when compiling
their machine-specific files with gcc-4.6.
(anderson(a)redhat.com)
- Fix for the "irq" command on 2.6.39 and later kernels. Without the
patch, the command fails with the message "irq: invalid structure
member offset: irq_desc_t_status".
(anderson(a)redhat.com)
- Fix for the SIAL extension module that solves the problem of getting
access to integer variables.
(maxc(a)gmx.co.uk)
- Fix for compiler warnings when building the extensions/sial.so
extension module with recent versions of /usr/bin/ld. Without the
patch, two warning messages are displayed: "/usr/bin/ld: Warning:
alignment 4 of symbol 'sialppdebug' in /tmp/ccYSzE2s.o is smaller
than 16 in libsial/libsial.a(sialpp.tab.o)" and "/usr/bin/ld:
Warning: alignment 4 of symbol 'sialdebug' in /tmp/ccYSzE2s.o is
smaller than 16 in libsial/libsial.a(sial.tab.o)".
(maxc(a)gmx.co.uk)
- If the stack pointer found in the register set stored in the ELF
header of a compressed kdump dumpfile, a KVM dumpfile, or an SADUMP
dumpfile is either NULL or cannot be accessed, the register set will
be dumped after the error message. Without the patch, only the error
message was displayed.
(anderson(a)redhat.com)
- Preparation of the top-level crash sources for more efficient updates
of the embedded gdb version. The changes should be invisible other
than the fact that all top-level source files will now be compiled
with the -DGDB_xxx flag, because the gdb-defined TYPE_CODE_xxx values
that are exported in defs.h changed in more recent gdb versions.
(anderson(a)redhat.com)
- Fixes for potential segmentation violations during the panic task
search phase of session initialization from a version 4 or later
x86_64 compressed kdump, in which the number of ELF NT_PRSTATUS
notes in the dumpfile does not match the number of cpus running
when the system crashed.
(Joe.Lawrence(a)stratus.com, anderson(a)redhat.com)
- Created an exported set_tmpfile2() function that allows the caller
to pass in their own FILE pointer of an open file that only exists
during the execution of a command. It will afford the recursive-use
protection of open_tmpfile2() plus the automatic closure of the file
if the command fails prior to completion or if the user forgets to
close it with close_tmpfile2().
(anderson(a)redhat.com)
- Created a new "rd -r <outputfile>" option that copies raw data
from memory to an output file. It can be invoked either of two
possible manners:
crash> rd -r <outputfile> <address> <count>
crash> rd -r <outputfile> <address> -e <ending-address
The <count> value is always a byte count with this option.
(adrian.wenl(a)gmail.com, anderson(a)redhat.com)
- Fix for the ARM "bt" command to store the correct value of the fp
register of active tasks. Without the patch, in rare circumstances,
the output may show an empty backtrace.
(per.xx.fransson(a)stericsson.com)
- Fix to prevent a harmless warning message when /proc/kallsyms is used
as a mapfile argument. Without the patch, during initialization,
the message "crash: /proc/kallsyms: lseek: Invalid argument" is
displayed. If a regular file copy of /proc/kallsyms is used, the
message is not displayed.
(anderson(a)redhat.com)
- Fix for running against live x86 kernels that have been relocated
by the Intel Trusted Boot or "tboot" facility. Without the patch,
a live crash session fails during invocation with the error message
"crash: vmlinux and /dev/mem do not match!" (or "/dev/crash" if
applicable). As a work-around, "/proc/kallsyms" can be entered on
the command line, or the "--reloc=<size>" option can be used, but
this fix obviates that requirement for live systems.
(anderson(a)redhat.com)
- Fix for the unlikely event where makedumpfile-generated s390/s390x
compressed kdumps do not have a CPU count in the dumpfile header.
This can happen when older s390 dump tools are used to create a dump
that do not write the CPU information into the s390 dump header.
Without the patch, the warning message "crash: compressed kdump:
invalid nr_cpus: 0" is displayed, the dumpfile is not recognized
as a compressed kdump, and the session fails. Since s390/s390x have
a fallback function that gets the CPU register information out of
memory, the same warning message will be displayed, but the dumpfile
will still be recognized as a compressed kdump.
(holzheu(a)linux.vnet.ibm.com)
- Fix for the "net -s" command on 2.6.38 and later kernels. Without
the patch, the command fails with the error message "net: invalid
structure member offset: inet_opt_daddr".
(bob.montgomery(a)hp.com, anderson(a)redhat.com)