linux-kernel - [PATCH 5.15 213/247] scripts/gdb: change kernel config dumping method

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Message-Id: <20220613094929.400111120@linuxfoundation.org>
Date:   Mon, 13 Jun 2022 12:11:55 +0200
From:   Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To:     linux-kernel@...r.kernel.org
Cc:     Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
        stable@...r.kernel.org, Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.15 213/247] scripts/gdb: change kernel config dumping method

From: Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>

[ Upstream commit 1f7a6cf6b07c74a17343c2559cd5f5018a245961 ]

MAGIC_START("IKCFG_ST") and MAGIC_END("IKCFG_ED") are moved out
from the kernel_config_data variable.

Thus, we parse kernel_config_data directly instead of considering
offset of MAGIC_START and MAGIC_END.

Fixes: 13610aa908dc ("kernel/configs: use .incbin directive to embed config_data.gz")
Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@...iatek.com>
Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
 scripts/gdb/linux/config.py | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)

diff --git a/scripts/gdb/linux/config.py b/scripts/gdb/linux/config.py
index 90e1565b1967..8843ab3cbadd 100644
--- a/scripts/gdb/linux/config.py
+++ b/scripts/gdb/linux/config.py
@@ -24,9 +24,9 @@ class LxConfigDump(gdb.Command):
             filename = arg
 
         try:
-            py_config_ptr = gdb.parse_and_eval("kernel_config_data + 8")
-            py_config_size = gdb.parse_and_eval(
-                    "sizeof(kernel_config_data) - 1 - 8 * 2")
+            py_config_ptr = gdb.parse_and_eval("&kernel_config_data")
+            py_config_ptr_end = gdb.parse_and_eval("&kernel_config_data_end")
+            py_config_size = py_config_ptr_end - py_config_ptr
         except gdb.error as e:
             raise gdb.GdbError("Can't find config, enable CONFIG_IKCONFIG?")
 
-- 
2.35.1