A pair of scripts to make it easier to run and debug 32 bit executables on 64 bit systems

src/scripts/debug_32bit.sh

+#!/bin/bash
+
+# Copyright (c) 2009 The Chromium OS Authors. All rights reserved.
+# Use of this source code is governed by a BSD-style license that can be
+# found in the LICENSE file.
+
+# Debug a 32 bit binary on 64 bit linux.  Can be run from inside or outside
+# the chroot.  If inside, then the 32 bit gdb from the chroot is used, otherwise
+# the system's 64 bit gdb is used.
+
+. "$(dirname "$0")/common.sh"
+
+# Command line options
+DEFINE_string chroot "$DEFAULT_CHROOT_DIR" "Location of chroot"
+
+# Parse command line and update positional args
+FLAGS "$@" || exit 1
+eval set -- "${FLAGS_ARGV}"
+
+  # Die on any errors
+set -e
+
+if [ -z "$SYSROOT" ]; then
+  if [ $INSIDE_CHROOT == 1 ]; then
+    SYSROOT=/build/x86-generic
+  else
+    SYSROOT=$FLAGS_chroot/build/x86-generic
+  fi
+fi
+
+if [ -z "$CHOST" ]; then
+  CHOST="x86-generic"
+fi
+
+SYSROOT="$FLAGS_chroot/build/$CHOST"
+LIB_PATHS="/lib32:/usr/lib32:$LIB_PATHS:$SYSROOT/usr/lib:$SYSROOT/lib:."
+LIB_PATHS="$LIB_PATHS:$SYSROOT/opt/google/chrome/chromeos"
+
+if [ $INSIDE_CHROOT == 1 ]; then
+  # if we're inside the chroot, the we'll be running a 32 bit gdb, so we'll
+  # need the same library path as the target
+  export LD_LIBRARY_PATH=$LIB_PATHS
+  GDB="$SYSROOT/usr/bin/gdb"
+else
+  GDB="gdb"
+fi
+
+exec $GDB \
+  --eval-command "set environment LD_LIBRARY_PATH=$LIB_PATHS" \
+  --eval-command "set sysroot $SYSROOT " \
+  --eval-command "set prompt (cros-gdb) " \
+  --args "$@"