title: Remote 'g' packet reply is too long aarch64 arm64
body: <p>I am trying to setup KGDB to debug our arm64 kernel. My setup is that target is running on kernel 3.14 (with some arm64 kgdb patches back ported), on host I used the linaro toolchain 4.8 aarch64-linux-gnu-gdb, and whenever I issue:</p>
  
  <pre><code>target remote /dev/ttyS0
  </code></pre>
  
  <p>I got the error message:</p>
  
  <pre><code>Remote 'g' packet reply is too long:
  </code></pre>
  
  <p>I Googled a lot on the problem, and none of them worked out for me. I think this problem is specific to arm64. Does anyone here by any chance know how to proceed?</p>