From: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> To: Jan Kiszka <jan.kiszka@siemens.com>, Kieran Bingham <kbingham@kernel.org>, Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: <chinwen.chang@mediatek.com>, <qun-wei.lin@mediatek.com>, <linux-mm@kvack.org>, <linux-modules@vger.kernel.org>, <casper.li@mediatek.com>, <akpm@linux-foundation.org>, <linux-arm-kernel@lists.infradead.org>, Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>, <linux-kernel@vger.kernel.org>, <linux-mediatek@lists.infradead.org> Subject: [PATCH v2 2/8] scripts/gdb/modules: add get module text support Date: Tue, 8 Aug 2023 16:30:12 +0800 [thread overview] Message-ID: <20230808083020.22254-3-Kuan-Ying.Lee@mediatek.com> (raw) In-Reply-To: <20230808083020.22254-1-Kuan-Ying.Lee@mediatek.com> When we get an text address from coredump and we cannot find this address in vmlinux, it might located in kernel module. We want to know which kernel module it located in. This GDB scripts can help us to find the target kernel module. (gdb) lx-getmod-by-textaddr 0xffff800002d305ac 0xffff800002d305ac is in kasan_test.ko Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> --- scripts/gdb/linux/modules.py | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/scripts/gdb/linux/modules.py b/scripts/gdb/linux/modules.py index f76a43bfa15f..298dfcc25eae 100644 --- a/scripts/gdb/linux/modules.py +++ b/scripts/gdb/linux/modules.py @@ -97,5 +97,35 @@ class LxLsmod(gdb.Command): gdb.write("\n") - LxLsmod() + +def help(): + t = """Usage: lx-getmod-by-textaddr [Heximal Address] + Example: lx-getmod-by-textaddr 0xffff800002d305ac\n""" + gdb.write("Unrecognized command\n") + raise gdb.GdbError(t) + +class LxFindTextAddrinMod(gdb.Command): + '''Look up loaded kernel module by text address.''' + + def __init__(self): + super(LxFindTextAddrinMod, self).__init__('lx-getmod-by-textaddr', gdb.COMMAND_SUPPORT) + + def invoke(self, arg, from_tty): + args = gdb.string_to_argv(arg) + + if len(args) != 1: + help() + + addr = gdb.Value(int(args[0], 16)).cast(utils.get_ulong_type()) + for mod in module_list(): + mod_text_start = mod['mem'][constants.LX_MOD_TEXT]['base'] + mod_text_end = mod_text_start + mod['mem'][constants.LX_MOD_TEXT]['size'].cast(utils.get_ulong_type()) + + if addr >= mod_text_start and addr < mod_text_end: + s = "0x%x" % addr + " is in " + mod['name'].string() + ".ko\n" + gdb.write(s) + return + gdb.write("0x%x is not in any module text section\n" % addr) + +LxFindTextAddrinMod() -- 2.18.0
WARNING: multiple messages have this Message-ID (diff)
From: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> To: Jan Kiszka <jan.kiszka@siemens.com>, Kieran Bingham <kbingham@kernel.org>, Matthias Brugger <matthias.bgg@gmail.com>, AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com> Cc: <chinwen.chang@mediatek.com>, <qun-wei.lin@mediatek.com>, <linux-mm@kvack.org>, <linux-modules@vger.kernel.org>, <casper.li@mediatek.com>, <akpm@linux-foundation.org>, <linux-arm-kernel@lists.infradead.org>, Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com>, <linux-kernel@vger.kernel.org>, <linux-mediatek@lists.infradead.org> Subject: [PATCH v2 2/8] scripts/gdb/modules: add get module text support Date: Tue, 8 Aug 2023 16:30:12 +0800 [thread overview] Message-ID: <20230808083020.22254-3-Kuan-Ying.Lee@mediatek.com> (raw) In-Reply-To: <20230808083020.22254-1-Kuan-Ying.Lee@mediatek.com> When we get an text address from coredump and we cannot find this address in vmlinux, it might located in kernel module. We want to know which kernel module it located in. This GDB scripts can help us to find the target kernel module. (gdb) lx-getmod-by-textaddr 0xffff800002d305ac 0xffff800002d305ac is in kasan_test.ko Signed-off-by: Kuan-Ying Lee <Kuan-Ying.Lee@mediatek.com> --- scripts/gdb/linux/modules.py | 32 +++++++++++++++++++++++++++++++- 1 file changed, 31 insertions(+), 1 deletion(-) diff --git a/scripts/gdb/linux/modules.py b/scripts/gdb/linux/modules.py index f76a43bfa15f..298dfcc25eae 100644 --- a/scripts/gdb/linux/modules.py +++ b/scripts/gdb/linux/modules.py @@ -97,5 +97,35 @@ class LxLsmod(gdb.Command): gdb.write("\n") - LxLsmod() + +def help(): + t = """Usage: lx-getmod-by-textaddr [Heximal Address] + Example: lx-getmod-by-textaddr 0xffff800002d305ac\n""" + gdb.write("Unrecognized command\n") + raise gdb.GdbError(t) + +class LxFindTextAddrinMod(gdb.Command): + '''Look up loaded kernel module by text address.''' + + def __init__(self): + super(LxFindTextAddrinMod, self).__init__('lx-getmod-by-textaddr', gdb.COMMAND_SUPPORT) + + def invoke(self, arg, from_tty): + args = gdb.string_to_argv(arg) + + if len(args) != 1: + help() + + addr = gdb.Value(int(args[0], 16)).cast(utils.get_ulong_type()) + for mod in module_list(): + mod_text_start = mod['mem'][constants.LX_MOD_TEXT]['base'] + mod_text_end = mod_text_start + mod['mem'][constants.LX_MOD_TEXT]['size'].cast(utils.get_ulong_type()) + + if addr >= mod_text_start and addr < mod_text_end: + s = "0x%x" % addr + " is in " + mod['name'].string() + ".ko\n" + gdb.write(s) + return + gdb.write("0x%x is not in any module text section\n" % addr) + +LxFindTextAddrinMod() -- 2.18.0 _______________________________________________ linux-arm-kernel mailing list linux-arm-kernel@lists.infradead.org http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2023-08-08 16:16 UTC|newest] Thread overview: 22+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-08-08 8:30 [PATCH v2 0/8] Add GDB memory helper commands Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee 2023-08-08 8:30 ` [PATCH v2 1/8] scripts/gdb/symbols: add specific ko module load command Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee 2023-09-12 9:41 ` Johannes Berg 2023-09-12 9:41 ` Johannes Berg 2023-09-12 16:23 ` Andrew Morton 2023-09-12 16:23 ` Andrew Morton 2023-08-08 8:30 ` Kuan-Ying Lee [this message] 2023-08-08 8:30 ` [PATCH v2 2/8] scripts/gdb/modules: add get module text support Kuan-Ying Lee 2023-08-08 8:30 ` [PATCH v2 3/8] scripts/gdb/utils: add common type usage Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee 2023-08-08 8:30 ` [PATCH v2 4/8] scripts/gdb/aarch64: add aarch64 page operation helper commands and configs Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee 2023-08-08 8:30 ` [PATCH v2 5/8] scripts/gdb/stackdepot: Add stackdepot support Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee 2023-08-08 8:30 ` [PATCH v2 6/8] scripts/gdb/page_owner: add page owner support Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee 2023-08-08 8:30 ` [PATCH v2 7/8] scripts/gdb/slab: Add slab support Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee 2023-08-08 8:30 ` [PATCH v2 8/8] scripts/gdb/vmalloc: add vmallocinfo support Kuan-Ying Lee 2023-08-08 8:30 ` Kuan-Ying Lee
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