#!/usr/bin/env bash
set -eu
. common
after=''
arch='x86_64'
before=''
gem5=false
lx_symbols="-ex 'lx-symbols ../kernel_module-1.0/'"
kgdb=false
while getopts A:a:b:gkL OPT; do
  case "$OPT" in
    a)
      arch="$OPTARG"
      ;;
    A)
      after="$OPTARG"
      ;;
    b)
      before="$OPTARG"
      ;;
    g)
      gem5=true
      ;;
    k)
      kgdb=true
      ;;
    L)
      lx_symbols=''
      ;;
  esac
done
shift "$(($OPTIND - 1))"
if [ "$#" -gt 0 ]; then
  brk="-ex 'break ${1}'"
  shift
else
  brk=''
fi
if "$gem5"; then
  port=7000
else
  port=1234
fi
set_common_vars "$arch" "$gem5"
gdb="${out_dir}/host/usr/bin/${arch}-linux-gdb ${before}"
cd "${out_dir}/build/linux-custom/"
if "$kgdb"; then
    cmd="\
${gdb} \
-q \
-ex 'add-auto-load-safe-path $(pwd)' \
-ex 'file vmlinux' \
-ex 'target remote localhost:${port}'
"
else
  # ## lx-symbols
  #
  # ### lx-symbols after continue
  #
  # lx symbols must be run after continue.
  #
  # running it immediately after the connect on the bootloader leads to failure,
  # likely because kernel structure on which it depends are not yet available.
  #
  # With this setup, continue runs, and lx-symbols only runs when a break happens,
  # either by hitting the breakpoint, or by entering Ctrl + C.
  #
  # Sure, if the user sets a break on a raw address of the bootloader,
  # problems will still arise, but let's think about that some other time.
  #
  # ### lx-symbols autoload
  #
  # The lx-symbols commands gets loaded through the file vmlinux-gdb.py
  # which gets put on the kernel build root when python debugging scripts are enabled.
  cmd="\
${gdb} \
-q \
-ex 'add-auto-load-safe-path $(pwd)' \
-ex 'file vmlinux' \
-ex 'target remote localhost:${port}' \
${brk} \
-ex 'continue' \
${lx_symbols} \
"
fi
cmd="$cmd $after"
echo "$cmd" | tee "${root_dir}/rungdb.log"
eval "$cmd"