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authorKuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>2023-08-08 11:30:11 +0300
committerAndrew Morton <akpm@linux-foundation.org>2023-08-21 23:46:21 +0300
commit11f956538c07e566bb8edf399c30cccb064df5a3 (patch)
tree34546ce45635c966d389c81c7dc7500ab10e5840 /scripts/gdb
parent8e7b7ffbd40fdac5ee243f8295983ef371f715c9 (diff)
downloadlinux-11f956538c07e566bb8edf399c30cccb064df5a3.tar.xz
scripts/gdb/symbols: add specific ko module load command
Patch series "Add GDB memory helper commands", v2. I've created some GDB commands I think useful when I debug some memory issues and kernel module issue. For memory issue, we would like to get slabinfo, slabtrace, page_owner and vmallocinfo to debug the memory issues. For module issue, we would like to query kernel module name when we get a module text address and load module symbol by specific path. Patch 1-2: - Add kernel module related command. Patch 3-5: - Prepares for the memory-related command. Patch 6-8: - Add memory-related commands. This patch (of 8): Add lx-symbols <ko_path> command to support add specific ko module. Example output like below: (gdb) lx-symbols mm/kasan/kasan_test.ko loading @0xffff800002d30000: mm/kasan/kasan_test.ko Link: https://lkml.kernel.org/r/20230808083020.22254-1-Kuan-Ying.Lee@mediatek.com Link: https://lkml.kernel.org/r/20230808083020.22254-2-Kuan-Ying.Lee@mediatek.com Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> Cc: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: Chinwen Chang <chinwen.chang@mediatek.com> Cc: Matthias Brugger <matthias.bgg@gmail.com> Cc: Qun-Wei Lin <qun-wei.lin@mediatek.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Diffstat (limited to 'scripts/gdb')
-rw-r--r--scripts/gdb/linux/symbols.py23
1 files changed, 21 insertions, 2 deletions
diff --git a/scripts/gdb/linux/symbols.py b/scripts/gdb/linux/symbols.py
index c8047f4441e6..5179edd1b627 100644
--- a/scripts/gdb/linux/symbols.py
+++ b/scripts/gdb/linux/symbols.py
@@ -111,11 +111,12 @@ lx-symbols command."""
return "{textaddr} {sections}".format(
textaddr=textaddr, sections="".join(args))
- def load_module_symbols(self, module):
+ def load_module_symbols(self, module, module_file=None):
module_name = module['name'].string()
module_addr = str(module['mem'][constants.LX_MOD_TEXT]['base']).split()[0]
- module_file = self._get_module_file(module_name)
+ if not module_file:
+ module_file = self._get_module_file(module_name)
if not module_file and not self.module_files_updated:
self._update_module_files()
module_file = self._get_module_file(module_name)
@@ -138,6 +139,19 @@ lx-symbols command."""
else:
gdb.write("no module object found for '{0}'\n".format(module_name))
+ def load_ko_symbols(self, mod_path):
+ self.loaded_modules = []
+ module_list = modules.module_list()
+
+ for module in module_list:
+ module_name = module['name'].string()
+ module_pattern = ".*/{0}\.ko(?:.debug)?$".format(
+ module_name.replace("_", r"[_\-]"))
+ if re.match(module_pattern, mod_path) and os.path.exists(mod_path):
+ self.load_module_symbols(module, mod_path)
+ return
+ raise gdb.GdbError("%s is not a valid .ko\n" % mod_path)
+
def load_all_symbols(self):
gdb.write("loading vmlinux\n")
@@ -176,6 +190,11 @@ lx-symbols command."""
self.module_files = []
self.module_files_updated = False
+ argv = gdb.string_to_argv(arg)
+ if len(argv) == 1:
+ self.load_ko_symbols(argv[0])
+ return
+
self.load_all_symbols()
if hasattr(gdb, 'Breakpoint'):