scripts/gdb: use mem instead of core_layout to get the module address

commit ac3b4328 ("module: replace module_layout with module_memory")
changed the struct module data structure from module_layout to
module_memory. The core_layout member which is used while loading
modules are not available anymore leading to the following error while
running gdb:

(gdb) lx-symbols
loading vmlinux
Python Exception <class 'gdb.error'>: There is no member named core_layout.
Error occurred in Python: There is no member named core_layout.

Replace core_layout with its new counterpart mem[MOD_TEXT].

Fixes: ac3b4328 ("module: replace module_layout with module_memory")
Signed-off-by: Pankaj Raghav <p.raghav@samsung.com>
Signed-off-by: Luis Chamberlain <mcgrof@kernel.org>

scripts/gdb/linux/constants.py.in

@@ -54,6 +54,9 @@ LX_VALUE(SB_NODIRATIME)
 /* linux/htimer.h */
 LX_GDBPARSED(hrtimer_resolution)
 
+/* linux/module.h */
+LX_GDBPARSED(MOD_TEXT)
+
 /* linux/mount.h */
 LX_VALUE(MNT_NOSUID)
 LX_VALUE(MNT_NODEV)

scripts/gdb/linux/modules.py

@@ -13,7 +13,7 @@
 
 import gdb
 
-from linux import cpus, utils, lists
+from linux import cpus, utils, lists, constants
 
 
 module_type = utils.CachedType("struct module")
@@ -73,7 +73,7 @@ class LxLsmod(gdb.Command):
                 "        " if utils.get_long_type().sizeof == 8 else ""))
 
         for module in module_list():
-            layout = module['core_layout']
+            layout = module['mem'][constants.LX_MOD_TEXT]
             gdb.write("{address} {name:<19} {size:>8}  {ref}".format(
                 address=str(layout['base']).split()[0],
                 name=module['name'].string(),

scripts/gdb/linux/symbols.py

@@ -15,7 +15,7 @@ import gdb
 import os
 import re
 
-from linux import modules, utils
+from linux import modules, utils, constants
 
 
 if hasattr(gdb, 'Breakpoint'):
@@ -109,7 +109,7 @@ lx-symbols command."""
 
     def load_module_symbols(self, module):
         module_name = module['name'].string()
-        module_addr = str(module['core_layout']['base']).split()[0]
+        module_addr = str(module['mem'][constants.LX_MOD_TEXT]['base']).split()[0]
 
         module_file = self._get_module_file(module_name)
         if not module_file and not self.module_files_updated: