----- "Alex Sidorenko" <asid@xxxxxx> wrote:
> Hi Dave,
>
> I have found that crash-4.0.9 cannot load any extensions on 32-bit hosts, even
> echo.so. Running crash with -d5 on a live 32-bit kernel I can see that it
> fails as
>
> crash> extend extensions/echo.so
> extend: ./extensions/echo.so: machine type mismatch: 3
> extend: ./extensions/echo.so: not an ELF format object file
>
> if (!is_shared_object(ext->filename)) {
> error(INFO, "%s: not an ELF format object file\n",
>
>
> Something is wrong in is_shared_object() logic on IA32. It is interesting that
> there are no problems with crash-4.0.9 and extensions on 64-bit systems. As
> most of us are running 64 bits, this probably explains why nobody reported
> this bug yet.
Thanks -- I'll take a look. It appears that the extension module
is passing this test in is_shared_object():
if (elf64->e_ident[EI_CLASS] == ELFCLASS64 ...
What does "readelf -a" show for the echo.so file? (I don't have
a handy x86 machine readily available at the moment...)
Dave
--
Crash-utility mailing list
Crash-utility@xxxxxxxxxx
https://www.redhat.com/mailman/listinfo/crash-utility
