path: root/scripts/gdb
diff options
authorDouglas Anderson <>2019-09-25 16:47:48 -0700
committerLinus Torvalds <>2019-09-25 17:51:40 -0700
commitda036ae147624b70f7d3784ff3a53bd4fda20d2a (patch)
tree000de0f9d9480fe86e9b7c9b9b4e489b070d74e4 /scripts/gdb
parent7d92bda271ddcbb2d1be2f82733dcb9bf8378010 (diff)
scripts/gdb: handle split debug
Some systems (like Chrome OS) may use "split debug" for kernel modules. That means that the debug symbols are in a different file than the main elf file. Let's handle that by also searching for debug symbols that end in ".ko.debug". This is a packaging topic. You can take a normal elf file and split the debug out of it using objcopy. Try "man objcopy" and then take a look at the "--only-keep-debug" option. It'll give you a whole recipe for doing splitdebug. The suffix used for the debug symbols is arbitrary. If people have other another suffix besides ".ko.debug" then we could presumably support that too... For portage (which is the packaging system used by Chrome OS) split debug is supported by default (and the suffix is .ko.debug). ...and so in Chrome OS we always get the installed elf files stripped and then the symbols stashed away. At the moment we don't actually use the normal portage magic to do this for the kernel though since it affects our ability to get good stack dumps in the kernel. We instead pass a script as "strip" [1]. [1] Link: Signed-off-by: Douglas Anderson <> Reviewed-by: Stephen Boyd <> Reviewed-by: Jan Kiszka <> Cc: Kieran Bingham <> Cc: Jason Wessel <> Cc: Daniel Thompson <> Signed-off-by: Andrew Morton <> Signed-off-by: Linus Torvalds <>
Diffstat (limited to 'scripts/gdb')
1 files changed, 2 insertions, 2 deletions
diff --git a/scripts/gdb/linux/ b/scripts/gdb/linux/
index 2f5b95f09fa0..34e40e96dee2 100644
--- a/scripts/gdb/linux/
+++ b/scripts/gdb/linux/
@@ -77,12 +77,12 @@ lx-symbols command."""
gdb.write("scanning for modules in {0}\n".format(path))
for root, dirs, files in os.walk(path):
for name in files:
- if name.endswith(".ko"):
+ if name.endswith(".ko") or name.endswith(".ko.debug"):
self.module_files.append(root + "/" + name)
self.module_files_updated = True
def _get_module_file(self, module_name):
- module_pattern = ".*/{0}\.ko$".format(
+ module_pattern = ".*/{0}\.ko(?:.debug)?$".format(
module_name.replace("_", r"[_\-]"))
for name in self.module_files:
if re.match(module_pattern, name) and os.path.exists(name):