[PATCH 0/2] arch_dump: fix prstatus pid on s390x and ppc

[Omar Sandoval <osandov@osandov.com>]

Hello,

I maintain drgn [1], a debugger for the Linux kernel. I ran into a quirk
of the NT_PRSTATUS note in kernel core dumps [2], so I looked into how
QEMU's dump-guest-memory command generates NT_PRSTATUS. I noticed that
on most architectures, the note's PID field is set to the CPU ID plus 1.
There are two exceptions: on s390x, there's an endianness bug (it's not
byte swapped if the host is little endian), and on ppc, it's not set at
all (it defaults to zero). They're both easy fixes.

Thanks,
Omar

1: https://github.com/osandov/drgn
2: https://github.com/osandov/drgn/issues/404

Omar Sandoval (2):
  target/s390x/arch_dump: use correct byte order for pid
  target/ppc/arch_dump: set prstatus pid to cpuid

 target/ppc/arch_dump.c   | 21 ++++++++++++---------
 target/s390x/arch_dump.c |  2 +-
 2 files changed, 13 insertions(+), 10 deletions(-)

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2.45.2