gdb helper script to easily add android symbol files

utils/load_sym_files.py

@@ -0,0 +1,61 @@
+# Copyright (c) 2013 Adrian Negreanu <[email protected]>
+
+# This program is free software; you can redistribute it and/or modify
+# it under the terms of the GNU General Public License as published by
+# the Free Software Foundation; either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU General Public License for more details.
+#
+# You should have received a copy of the GNU General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>
+
+import os
+import re
+import subprocess
+
+class LoadSymFiles(gdb.Command):
+    """Add symbol files for files in /proc/pid/maps:  load-sym-file symbols-directory"""
+    def __init__(self):
+        gdb.Command.__init__(self, "load-sym-files", gdb.COMMAND_FILES, gdb.COMPLETE_FILENAME, True)
+
+    def invoke(self, arg, from_tty):
+        arg_list = gdb.string_to_argv(arg)
+
+        if len(arg_list) < 1:
+            print "usage: load-sym-files symbols-dir"
+            return
+
+        symdir = arg_list[0]
+        if not os.path.isdir(symdir):
+            print "symbol directory is invalid"
+            return
+
+        pid = gdb.selected_inferior().pid
+        maps = open("/proc/%d/maps"%pid,"rb")
+        for line in maps:
+            # b7fc9000-b7fcf000 r-xp 00000000 08:01 1311443    /system/lib/liblog.so
+            m = re.match("([0-9A-Fa-f]+)-[0-9A-Fa-f]+\s+r-xp.*(/system/lib.*)", line)
+            if not m:
+                continue
+
+            start_addr = int(m.group(1),16)
+            lib        = m.group(2)
+            text_addr  = 0
+
+            p = subprocess.Popen("objdump -h "+lib , shell=True, stdout=subprocess.PIPE, stderr=subprocess.PIPE, stdin=subprocess.PIPE)
+            for header in  p.stdout.read().split("\n"):
+                #6 .text         00044ef7  00017f80  00017f80  00017f80  2**4
+                t = re.match("\s*[0-9]+\s+\.text\s+([0-9A-Fa-f]+\s+){3}([0-9A-Fa-f]+)",header)
+                if t:
+                    text_addr = int(t.group(2),16)
+                    break
+            symfile = symdir+lib
+            if os.path.isfile(symfile):
+                gdb.execute("add-symbol-file %s 0x%X" % (symfile,start_addr+text_addr))
+
+
+LoadSymFiles()