[PATCH v2 1/8] scripts/gdb/symbols: add specific ko module load command

[Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>]

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

Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@xxxxxxxxxxxx>
---
 scripts/gdb/linux/symbols.py | 23 +++++++++++++++++++++--
 1 file 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'):
-- 
2.18.0