drgn fails to analyze a vmcore captured from s390x or ppc64le systems with the error: could not read memory from kdump

Issue

• drgn fails to analyze a vmcore captured from s390x or ppc64le systems with the error: could not read memory from kdump

• Attempts to analyze vmcore files from s390x or ppc64le systems using the drgn debugger result in the following error:

# drgn -c vmcore -s /usr/lib/debug/lib/modules/6.12.0-55.9.1.el10_0.s390x/vmlinux
drgn 0.0.29 (using Python 3.12.9, elfutils 0.192, with libkdumpfile)
warning: missing some debugging symbols (see https://drgn.readthedocs.io/en/latest/getting_debugging_symbols.html):
  kernel modules (could not find loaded kernel modules: could not read memory from kdump: Cannot get page I/O address: No way to translate: 0x3dd03a1c698)
For help, type help(drgn).
>>> import drgn
>>> from drgn import FaultError, NULL, Object, alignof, cast, container_of, execscript, implicit_convert, offsetof, reinterpret, sizeof, stack_trace
>>> from drgn.helpers.common import *
>>> from drgn.helpers.linux import *
>>> 
>>> stack_trace(1)
Traceback (most recent call last):
  File "<console>", line 1, in <module>
  File "/usr/lib64/python3.12/site-packages/drgn/__init__.py", line 286, in stack_trace
    return get_default_prog().stack_trace(thread)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
_drgn.FaultError: could not read memory from kdump: Cannot get page I/O address: No way to translate: 0x3dd03a07b58

# drgn -c vmcore -s /usr/lib/debug/lib/modules/6.12.0-55.9.1.el10_0.s390x/vmlinux
drgn 0.0.29 (using Python 3.12.9, elfutils 0.192, with libkdumpfile)
warning: missing some debugging symbols (see https://drgn.readthedocs.io/en/latest/getting_debugging_symbols.html):
  kernel modules (could not find loaded kernel modules: could not read memory from kdump: Cannot get page I/O address: No way to translate: 0x3dd03a1c698)
For help, type help(drgn).
>>> import drgn
>>> from drgn import FaultError, NULL, Object, alignof, cast, container_of, execscript, implicit_convert, offsetof, reinterpret, sizeof, stack_trace
>>> from drgn.helpers.common import *
>>> from drgn.helpers.linux import *
>>> 
>>> print(prog['linux_banner'].to_bytes_())
Traceback (most recent call last):
  File "<console>", line 1, in <module>
TypeError: cannot read object with incomplete array type