linux/scripts/gdb/vmlinux-gdb.py
Leonard Crestez 778c1f5ccb scripts/gdb: add helpers to find and list devices
Add helper commands and functions for finding pointers to struct device
by enumerating linux device bus/class infrastructure.  This can be used
to fetch subsystem and driver-specific structs:

  (gdb) p *$container_of($lx_device_find_by_class_name("net", "eth0"), "struct net_device", "dev")
  (gdb) p *$container_of($lx_device_find_by_bus_name("i2c", "0-004b"), "struct i2c_client", "dev")
  (gdb) p *(struct imx_port*)$lx_device_find_by_class_name("tty", "ttymxc1")->parent->driver_data

Several generic "lx-device-list" functions are included to enumerate
devices by bus and class:

  (gdb) lx-device-list-bus usb
  (gdb) lx-device-list-class
  (gdb) lx-device-list-tree &platform_bus

Similar information is available in /sys but pointer values are
deliberately hidden.

Link: http://lkml.kernel.org/r/c948628041311cbf1b9b4cff3dda7d2073cb3eaa.1561492937.git.leonard.crestez@nxp.com
Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com>
Reviewed-by: Stephen Boyd <sboyd@kernel.org>
Cc: Kieran Bingham <kbingham@kernel.org>
Cc: Jan Kiszka <jan.kiszka@siemens.com>
Cc: "Rafael J. Wysocki" <rafael@kernel.org>
Cc: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
Signed-off-by: Andrew Morton <akpm@linux-foundation.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16 19:23:24 -07:00

40 lines
864 B
Python

#
# gdb helper commands and functions for Linux kernel debugging
#
# loader module
#
# Copyright (c) Siemens AG, 2012, 2013
#
# Authors:
# Jan Kiszka <jan.kiszka@siemens.com>
#
# This work is licensed under the terms of the GNU GPL version 2.
#
import os
sys.path.insert(0, os.path.dirname(__file__) + "/scripts/gdb")
try:
gdb.parse_and_eval("0")
gdb.execute("", to_string=True)
except:
gdb.write("NOTE: gdb 7.2 or later required for Linux helper scripts to "
"work.\n")
else:
import linux.utils
import linux.symbols
import linux.modules
import linux.dmesg
import linux.tasks
import linux.config
import linux.cpus
import linux.lists
import linux.rbtree
import linux.proc
import linux.constants
import linux.timerlist
import linux.clk
import linux.genpd
import linux.device