Antonio Borneo 45382d6907 scripts/gdb: fix 'lx-dmesg' on 32 bits arch ... [ Upstream commit e3c8d33e0d ] The type atomic_long_t can have size 4 or 8 bytes, depending on CONFIG_64BIT; it's only content, the field 'counter', is either an int or a s64 value. Current code incorrectly uses the fixed size utils.read_u64() to read the field 'counter' inside atomic_long_t. On 32 bits architectures reading the last element 'tail_id' of the struct prb_desc_ring: struct prb_desc_ring { ... atomic_long_t tail_id; }; causes the utils.read_u64() to access outside the boundary of the struct and the gdb command 'lx-dmesg' exits with error: Python Exception <class 'IndexError'>: index out of range Error occurred in Python: index out of range Query the really used atomic_long_t counter type size. Link: https://lore.kernel.org/r/20220617143758.137307-1-antonio.borneo@foss.st.com Fixes: e60768311a ("scripts/gdb: update for lockless printk ringbuffer") Signed-off-by: Antonio Borneo <antonio.borneo@foss.st.com> [pmladek@suse.com: Query the really used atomic_long_t counter type size] Tested-by: Antonio Borneo <antonio.borneo@foss.st.com> Reviewed-by: John Ogness <john.ogness@linutronix.de> Signed-off-by: Petr Mladek <pmladek@suse.com> Link: https://lore.kernel.org/r/20220719122831.19890-1-pmladek@suse.com Signed-off-by: Sasha Levin <sashal@kernel.org>		2022-08-17 14:23:56 +02:00
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linux	scripts/gdb: fix 'lx-dmesg' on 32 bits arch	2022-08-17 14:23:56 +02:00
Makefile	treewide: Add SPDX license identifier - Makefile/Kconfig	2019-05-21 10:50:46 +02:00
vmlinux-gdb.py	scripts/gdb: add helpers to find and list devices	2019-07-16 19:23:24 -07:00