- Update to crash 6.0.5 from upstream and adjust patch positions
to match current crash source.
6.0.5 changelog is:
o Enhancement to the "foreach" command to allow any of the "name"
arguments to be POSIX extended regular expressions. The
expression string must be encompassed by "'" characters, and
will be matched against the names of all tasks.
o Fix for the embedded gdb module's "ptype" command, and by
extension, the crash utility's "struct" command, to be able to
fully display embedded structure or union members of a
structure/union. Without the patch, if a structure or union is
a member of a structure or union that is a member of a
structure or union, then it is displayed as "struct {...}" or
"union {...}".
o Extend the "ps -l" output to also display the task state next
to its last_run/timestamp value.
o Enhancement to the "foreach" command which adds a new "state"
task-indentifier argument that filters tasks by their task
state. The state argument may be any of the task states
displayed by the "ps" command: RU, IN, UN, ST, ZO, SW or DE.
o Implemented a new pc->cmd_cleanup function pointer and an
optional pc->cmd_cleanup_arg argument that will allow any
command to register a function and an optional argument that
will be called after a command has completed successfully, or
more likely, unsuccessfully. Normally the only cleanup required
for a command is the freeing of buffers that were allocated
with GETBUF(), but that is performed automatically after each
command is run. However, with the introduction of the new
POSIX regular expression functionality of the "foreach"
command, there needed to be a way to call regfree() in the case
where where regcomp() was called successfully, but then the
command later encountered one of several fatal error
conditions. This facility is also available for use by
extension module commands.
o Enforce the usage of a kernel thread's pgd from its active_mm
for the ARM "vtop -c" command; if its active_mm is NULL, make
the command fail similarly to the other architectures,
displaying the error message "vtop: no active_mm for this
kernel thread".
o Fix for the x86_64 "bt" command running against recent kernels
if an active task was operating on its IRQ stack when the crash
occurred. Without the patch, the determination of the IRQ
exception frame was off-by-8, displaying invalid register data
and the error message "bt: WARNING: possibly bogus exception
frame".
o Update to handle the vfsmount structure change in 3.3 kernels,
in which most members of the vfsmount structure have been moved
into a new "struct mount", and the vfsmount structure has been
embedded in the new mount structure. Without the patch, the
following commands will fail, displaying the following error
messages:
mount: "mount: invalid structure member offset: vfsmount_mnt_list"
files: "files: invalid structure member offset: dentry_d_covers"
vm: "vm: invalid structure member offset: dentry_d_covers"
swap: "swap: invalid structure member offset: dentry_d_covers
fuser: "files: invalid structure member offset: dentry_d_covers"
The "fuser" command generates the above error because it uses
the "files" command behind the scenes.
o Fix for the "ps" command to prevent the display of "??" under
the ST (task state) column. Without the patch, in more recent
kernels, if more than one bit were set in the task_struct.state
field, the state would display "??". With the fix, the primary
state will always be displayed.
o Update to the output of the "set" command when it displays a
task's state. Without the patch, if more than one bit was set
in the task_struct.state field, "STATE: (unknown)" would be
displayed. With the fix, all bits in both the task_struct.state
and task_struct.exit_state fields are translated.
o Implemented a new "vm -P " option, which is similar
to "vm -p", but only does the page translations of the specified
VM area of a context.
o Add support for the Freescale PowerPC e500mc version of the E500
processor chipset, and rework the PPC platform-specific code in
order to more easily support new processors.
o Implemented a new "gdb" crash environment variable that can be
used to alter a crash session's behavior such that all commands
are passed directly to the embedded gdb module. The new mode
is turned on and off by entering "set gdb on" and "set gdb off".
When running in this mode, the command prompt will be "gdb>".
In order to execute native crash commands while running in this
mode, precede the command with the "crash" directive, for
example, "crash ps".
o Fix for a "*** stack smashing detected ***: crash terminated"
failure during the initial system banner display on a 32-bit
PPC platform.
o Redesigned/simplified the internal read_string() function to
prevent a potential segmentation violation.
o Updates for the 32-bit PPC "vtop" command output:
(1) Translate kernel virtual addresses for FSL BOOKE by using
the TLBCAM setting
(2) Remove the PMD line from the display
(3) Fix the displayed PHYSICAL values of FSL BOOKE PTE format
o Fix for crash invocation failure on 3.3-era kernels in which
the former standalone "xtime" timespec structure has been moved
into the "timekeeper" structure. Without the patch, the crash
session would fail early on with the message "crash: cannot
resolve: xtime". The patch also prevents the crash session
failure in the unlikely event that the timespec access fails.