tree ae267868c130248a5b56ae6d4616e0d584a3de2a
parent c7c9820071f8b81a64221f5cfafb3cbfeafe7916
author Andrew Burgess <aburgess@redhat.com> 1711454707 +0000
committer Andrew Burgess <aburgess@redhat.com> 1711454707 +0000

gdb: fix possible uninitialised variable use

After this commit:

  commit 198ff6ff819c240545f9fc68b39636fd376d4ba9
  Date:   Tue Jan 30 15:37:23 2024 +0000

      gdb/gdbserver: share x86/linux tdesc caching

a possible use of an uninitialised variable was introduced, the
'tdesc' variable in i386_linux_core_read_description might be read
without being written too if 'xcr0' was 0.

This is fixed in this commit.  I've updated the function to follow the
same pattern as amd64_linux_core_read_description, if xcr0 is 0 then
we select a default xcr0 value and use that to select a tdesc.