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2020-05-07scripts/gdb: repair rb_first() and rb_last()Aymeric Agon-Rambosson1-2/+2
The current implementations of the rb_first() and rb_last() gdb functions have a variable that references itself in its instanciation, which causes the function to throw an error if a specific condition on the argument is met. The original author rather intended to reference the argument and made a typo. Referring the argument instead makes the function work as intended. Signed-off-by: Aymeric Agon-Rambosson <aymeric.agon@yandex.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Link: http://lkml.kernel.org/r/20200427051029.354840-1-aymeric.agon@yandex.com Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2020-03-25.gitignore: add SPDX License IdentifierMasahiro Yamada1-0/+1
Add SPDX License Identifier to all .gitignore files. Signed-off-by: Masahiro Yamada <masahiroy@kernel.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-11-06scripts/gdb: fix debugging modules compiled with hot/cold partitioningIlya Leoshkevich1-1/+2
gcc's -freorder-blocks-and-partition option makes it group frequently and infrequently used code in .text.hot and .text.unlikely sections respectively. At least when building modules on s390, this option is used by default. gdb assumes that all code is located in .text section, and that .text section is located at module load address. With such modules this is no longer the case: there is code in .text.hot and .text.unlikely, and either of them might precede .text. Fix by explicitly telling gdb the addresses of code sections. It might be tempting to do this for all sections, not only the ones in the white list. Unfortunately, gdb appears to have an issue, when telling it about e.g. loadable .note.gnu.build-id section causes it to think that non-loadable .note.Linux section is loaded at address 0, which in turn causes NULL pointers to be resolved to bogus symbols. So keep using the white list approach for the time being. Link: http://lkml.kernel.org/r/20191028152734.13065-1-iii@linux.ibm.com Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-19scripts/gdb: fix debugging modules on s390Ilya Leoshkevich1-1/+7
Currently lx-symbols assumes that module text is always located at module->core_layout->base, but s390 uses the following layout: +------+ <- module->core_layout->base | GOT | +------+ <- module->core_layout->base + module->arch->plt_offset | PLT | +------+ <- module->core_layout->base + module->arch->plt_offset + | TEXT | module->arch->plt_size +------+ Therefore, when trying to debug modules on s390, all the symbol addresses are skewed by plt_offset + plt_size. Fix by adding plt_offset + plt_size to module_addr in load_module_symbols(). Link: http://lkml.kernel.org/r/20191017085917.81791-1-iii@linux.ibm.com Signed-off-by: Ilya Leoshkevich <iii@linux.ibm.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Vasily Gorbik <gor@linux.ibm.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-10-19scripts/gdb: fix lx-dmesg when CONFIG_PRINTK_CALLER is setJoel Colledge2-16/+25
When CONFIG_PRINTK_CALLER is set, struct printk_log contains an additional member caller_id. This affects the offset of the log text. Account for this by using the type information from gdb to determine all the offsets instead of using hardcoded values. This fixes following error: (gdb) lx-dmesg Python Exception <class 'ValueError'> embedded null character: Error occurred in Python command: embedded null character The read_u* utility functions now take an offset argument to make them easier to use. Link: http://lkml.kernel.org/r/20191011142500.2339-1-joel.colledge@linbit.com Signed-off-by: Joel Colledge <joel.colledge@linbit.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Leonard Crestez <leonard.crestez@nxp.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-09-25scripts/gdb: handle split debugDouglas Anderson1-2/+2
Some systems (like Chrome OS) may use "split debug" for kernel modules. That means that the debug symbols are in a different file than the main elf file. Let's handle that by also searching for debug symbols that end in ".ko.debug". This is a packaging topic. You can take a normal elf file and split the debug out of it using objcopy. Try "man objcopy" and then take a look at the "--only-keep-debug" option. It'll give you a whole recipe for doing splitdebug. The suffix used for the debug symbols is arbitrary. If people have other another suffix besides ".ko.debug" then we could presumably support that too... For portage (which is the packaging system used by Chrome OS) split debug is supported by default (and the suffix is .ko.debug). ...and so in Chrome OS we always get the installed elf files stripped and then the symbols stashed away. At the moment we don't actually use the normal portage magic to do this for the kernel though since it affects our ability to get good stack dumps in the kernel. We instead pass a script as "strip" [1]. [1] https://chromium.googlesource.com/chromiumos/overlays/chromiumos-overlay/+/refs/heads/master/eclass/cros-kernel/strip_splitdebug Link: http://lkml.kernel.org/r/20190730234052.148744-1-dianders@chromium.org Signed-off-by: Douglas Anderson <dianders@chromium.org> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-07-16scripts/gdb: add helpers to find and list devicesLeonard Crestez2-0/+183
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>
2019-07-16scripts/gdb: add lx-genpd-summary commandLeonard Crestez2-0/+84
This is like /sys/kernel/debug/pm/pm_genpd_summary except it's accessible through a debugger. This can be useful if the target crashes or hangs because power domains were not properly enabled. Link: http://lkml.kernel.org/r/f9ee627a0d4f94b894aa202fee8a98444049bed8.1561492937.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>
2019-07-11kbuild: replace KBUILD_SRCTREE with boolean building_out_of_srctreeMasahiro Yamada1-1/+1
Commit 25b146c5b8ce ("kbuild: allow Kbuild to start from any directory") deprecated KBUILD_SRCTREE. It is only used in tools/testing/selftest/ to distinguish out-of-tree build. Replace it with a new boolean flag, building_out_of_srctree. I also replaced the conditional ($(srctree),.) because the next commit will allow an absolute path to be used for $(srctree) even when building in the source tree. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-06-01scripts/gdb: fix invocation when CONFIG_COMMON_CLK is not setFabiano Rosas1-1/+2
CLK_GET_RATE_NOCACHE depends on CONFIG_COMMON_CLK. Importing constants.py when CONFIG_COMMON_CLK is not defined causes: (gdb) lx-symbols (...) File "scripts/gdb/linux/proc.py", line 15, in <module> from linux import constants File "scripts/gdb/linux/constants.py", line 2, in <module> LX_CLK_GET_RATE_NOCACHE = gdb.parse_and_eval("CLK_GET_RATE_NOCACHE") gdb.error: No symbol "CLK_GET_RATE_NOCACHE" in current context. Link: http://lkml.kernel.org/r/20190523195313.24701-1-farosas@linux.ibm.com Fixes: e7e6f462c1be ("scripts/gdb: print cached rate in lx-clk-summary") Signed-off-by: Fabiano Rosas <farosas@linux.ibm.com> Reviewed-by: Stephen Boyd <swboyd@chromium.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Leonard Crestez <leonard.crestez@nxp.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-21treewide: Add SPDX license identifier - Makefile/KconfigThomas Gleixner1-0/+1
Add SPDX license identifiers to all Make/Kconfig files which: - Have no license information of any form These files fall under the project license, GPL v2 only. The resulting SPDX license identifier is: GPL-2.0-only Signed-off-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2019-05-14scripts/gdb: print cached rate in lx-clk-summaryLeonard Crestez2-7/+18
The clk rate is always stored in clk_core but might be out of date and require calls to update from hardware. Deal with that case by printing a (c) suffix. Link: http://lkml.kernel.org/r/1a474318982a5f0125f2360c4161029b17f56bd1.1556881728.git.leonard.crestez@nxp.com Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: clean up error handling in list helpersLeonard Crestez1-8/+2
An incorrect argument to list_for_each is an internal error in gdb scripts so a TypeError should be raised. The gdb.GdbError exception type is intended for user errors such as incorrect invocation. Drop the type assertion in list_for_each_entry because list_for_each isn't going to suddenly yield something else. Applies to both list and hlist Link: http://lkml.kernel.org/r/c1d3fd4db13d999a3ba57f5bbc1924862d824f61.1556881728.git.leonard.crestez@nxp.com Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: add $lx_clk_core_lookup functionLeonard Crestez1-0/+23
Finding an individual clk_core requires walking the tree which can be quite complicated so add a helper for easy access. (gdb) print *(struct clk_scu*)$lx_clk_core_lookup("uart0_clk")->hw Link: http://lkml.kernel.org/r/Message-ID: Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: initial clk support: lx-clk-summaryLeonard Crestez2-0/+47
Add an lx-clk-summary command which prints a subset of /sys/kernel/debug/clk/clk_summary. This can be used to examine hangs caused by clk not being enabled. Link: http://lkml.kernel.org/r/Message-ID: Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Stephen Boyd <swboyd@chromium.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: add hlist utilitiesLeonard Crestez1-0/+23
This allows easily examining kernel hlists in python. Link: http://lkml.kernel.org/r/Message-ID: Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Stephen Boyd <sboyd@kernel.org> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Kieran Bingham <kbingham@kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: silence pep8 checksStephen Boyd5-5/+16
These scripts have some pep8 style warnings. Fix them up so that this directory is all pep8 clean. Link: http://lkml.kernel.org/r/20190329220844.38234-6-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: add a timer list commandStephen Boyd3-0/+233
Implement a command to print the timer list, much like how /proc/timer_list is implemented. This can be used to look at the pending timers on a crashed system. [swboyd@chromium.org: v2] Link: http://lkml.kernel.org/r/20190329220844.38234-5-swboyd@chromium.org Link: http://lkml.kernel.org/r/20190325184522.260535-5-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: add rb tree iterating utilitiesStephen Boyd2-0/+178
Implement gdb functions for rb_first(), rb_last(), rb_next(), and rb_prev(). These can be useful to iterate through the kernel's red-black trees. [swboyd@chromium.org: v2] Link: http://lkml.kernel.org/r/20190329220844.38234-4-swboyd@chromium.org Link: http://lkml.kernel.org/r/20190325184522.260535-4-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: add kernel config dumping commandStephen Boyd2-0/+45
lx-configdump <file> dumps the contents of the gzipped .config to a text file when the config is included in the kernel with CONFIG_IKCONFIG. By default, the file written is called config.txt, but it can be any user supplied filename as well. If the kernel config is in a module (configs.ko), then it can be loaded along with symbols for the module loaded with 'lx-symbols' and then this command will still work. Obviously if you have the whole vmlinux then this can also be achieved with scripts/extract-ikconfig, but this gdb script can be useful to confirm that the memory contents of the config in memory and the vmlinux contents on disk match what is expected. [swboyd@chromium.org: v2] Link: http://lkml.kernel.org/r/20190329220844.38234-3-swboyd@chromium.org Link: http://lkml.kernel.org/r/20190325184522.260535-3-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-05-14scripts/gdb: find vmlinux where it was beforeStephen Boyd1-1/+5
Patch series "gdb script for kconfig and timer list". This is a handful of changes to the kernel's gdb scripts to do some more debugging with kgdb. The first patch allows the vmlinux to be reloaded from where it was specified on the command line so that this set of scripts can be used from anywhere. The second patch adds a script to dump the config.gz to a file on the host debugging machine. The third patch adds some rb tree utilities and the last patch uses those rb tree walking utilities to dump out the contents of /proc/timer_list from a system under debug. This patch (of 5): If I run 'gdb <path/to/vmlinux>' and there's the vmlinux-gdb.py file there I can properly see symbols and use the lx commands provided by the GDB scripts. But once I run 'lx-symbols' at the command prompt, gdb reloads the vmlinux symbols assuming that this script was run from the directory that has vmlinux at the root. That isn't always true, but we could just look and see what symbols were already loaded and use that instead. Let's do that so this can work by being invoked anywhere. Link: http://lkml.kernel.org/r/20190325184522.260535-2-swboyd@chromium.org Signed-off-by: Stephen Boyd <swboyd@chromium.org> Cc: Douglas Anderson <dianders@chromium.org> Cc: Nikolay Borisov <n.borisov.lkml@gmail.com> Cc: Kieran Bingham <kbingham@kernel.org> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jackie Liu <liuyun01@kylinos.cn> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-04-02kbuild: use $(srctree) instead of KBUILD_SRC to check out-of-tree buildMasahiro Yamada1-1/+1
KBUILD_SRC was conventionally used for some different purposes: [1] To remember the source tree path [2] As a flag to check if sub-make is already done [3] As a flag to check if Kbuild runs out of tree For [1], we do not need to remember it because the top Makefile can compute it by $(realpath $(dir $(lastword $(MAKEFILE_LIST)))) [2] has been replaced with self-commenting 'sub_make_done'. For [3], we can distinguish in-tree/out-of-tree by comparing $(srctree) and '.' This commit converts [3] to prepare for the KBUILD_SRC removal. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
2019-03-10Merge tag 'kbuild-v5.1' of ↵Linus Torvalds1-12/+13
git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild Pull Kbuild updates from Masahiro Yamada: - do not generate unneeded top-level built-in.a - let git ignore O= directory entirely - optimize scripts/kallsyms slightly - exclude DWARF info from *.s regardless of config options - fix GCC toolchain search path for Clang to prepare ld.lld support - do not generate modules.order when CONFIG_MODULES is disabled - simplify single target rules and remove VPATH for external module build - allow to add optional flags to dpkg-buildpackage when building deb-pkg - move some compiler option tests from Makefile to Kconfig - various Makefile cleanups * tag 'kbuild-v5.1' of git://git.kernel.org/pub/scm/linux/kernel/git/masahiroy/linux-kbuild: (40 commits) kbuild: remove scripts/basic/% build target kbuild: use -Werror=implicit-... instead of -Werror-implicit-... kbuild: clean up scripts/gcc-version.sh kbuild: remove cc-version macro kbuild: update comment block of scripts/clang-version.sh kbuild: remove commented-out INITRD_COMPRESS kbuild: move -gsplit-dwarf, -gdwarf-4 option tests to Kconfig kbuild: [bin]deb-pkg: add DPKG_FLAGS variable kbuild: move ".config not found!" message from Kconfig to Makefile kbuild: invoke syncconfig if include/config/auto.conf.cmd is missing kbuild: simplify single target rules kbuild: remove empty rules for makefiles kbuild: make -r/-R effective in top Makefile for old Make versions kbuild: move tools_silent to a more relevant place kbuild: compute false-positive -Wmaybe-uninitialized cases in Kconfig kbuild: refactor cc-cross-prefix implementation kbuild: hardcode genksyms path and remove GENKSYMS variable scripts/gdb: refactor rules for symlink creation kbuild: create symlink to vmlinux-gdb.py in scripts_gdb target scripts/gdb: do not descend into scripts/gdb from scripts ...
2019-03-07scripts/gdb: replace flags (MS_xyz -> SB_xyz)Jackie Liu2-12/+12
Since commit 1751e8a6cb93 ("Rename superblock flags (MS_xyz -> SB_xyz)"), scripts/gdb should be updated to replace MS_xyz with SB_xyz. This change didn't directly affect the running operation of scripts/gdb until commit e262e32d6bde "vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled" removed the definitions used by constants.py. Update constants.py.in to utilise the new internal flags, matching the implementation at fs/proc_namespace.c::show_sb_opts. Note to stable, e262e32d6bde landed in v5.0-rc1 (which was just released), so we'll want this picked back to 5.0 stable once this patch hits mainline (akpm just picked it up). Without this, debugging a kernel a kernel via GDB+QEMU is broken in the 5.0 release. [kieran.bingham@ideasonboard.com: add fixes tag, reword commit message] Link: http://lkml.kernel.org/r/20190305103014.25847-1-kieran.bingham@ideasonboard.com Fixes: e262e32d6bde "vfs: Suppress MS_* flag defs within the kernel unless explicitly enabled" Signed-off-by: Jackie Liu <liuyun01@kylinos.cn> Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Tested-by: Nick Desaulniers <ndesaulniers@google.com> Tested-by: Kieran Bingham <kieran.bingham@ideasonboard.com> Cc: Felipe Balbi <felipe.balbi@linux.intel.com> Cc: Dan Robertson <danlrobertson89@gmail.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: David Howells <dhowells@redhat.com> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2019-02-27scripts/gdb: refactor rules for symlink creationMasahiro Yamada1-7/+11
gdb-scripts is not a real object, but (ab)used like a phony target. Rewrite the code in a more Kbuild-ish way. Add symlinks to extra-y and use if_changed. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-02-27scripts/gdb: do not descend into scripts/gdb from scriptsMasahiro Yamada1-6/+3
Currently, Kbuild descends from scripts/Makefile to scripts/gdb/Makefile just for creating symbolic links, but it does not need to do it so early. Merge the two descending paths to simplify the code. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
2019-01-04scripts/gdb: fix lx-version string outputDu Changbin1-1/+1
A bug is present in GDB which causes early string termination when parsing variables. This has been reported [0], but we should ensure that we can support at least basic printing of the core kernel strings. For current gdb version (has been tested with 7.3 and 8.1), 'lx-version' only prints one character. (gdb) lx-version L(gdb) This can be fixed by casting 'linux_banner' as (char *). (gdb) lx-version Linux version 4.19.0-rc1+ (changbin@acer) (gcc version 7.3.0 (Ubuntu 7.3.0-16ubuntu3)) #21 SMP Sat Sep 1 21:43:30 CST 2018 [0] https://sourceware.org/bugzilla/show_bug.cgi?id=20077 [kbingham@kernel.org: add detail to commit message] Link: http://lkml.kernel.org/r/20181111162035.8356-1-kieran.bingham@ideasonboard.com Fixes: 2d061d999424 ("scripts/gdb: add version command") Signed-off-by: Du Changbin <changbin.du@gmail.com> Signed-off-by: Kieran Bingham <kbingham@kernel.org> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Daniel Thompson <daniel.thompson@linaro.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2018-01-19scripts/gdb/linux/tasks.py: fix get_thread_infoXi Kangjie1-0/+2
Since kernel 4.9, the thread_info has been moved into task_struct, no longer locates at the bottom of kernel stack. See commits c65eacbe290b ("sched/core: Allow putting thread_info into task_struct") and 15f4eae70d36 ("x86: Move thread_info into task_struct"). Before fix: (gdb) set $current = $lx_current() (gdb) p $lx_thread_info($current) $1 = {flags = 1470918301} (gdb) p $current.thread_info $2 = {flags = 2147483648} After fix: (gdb) p $lx_thread_info($current) $1 = {flags = 2147483648} (gdb) p $current.thread_info $2 = {flags = 2147483648} Link: http://lkml.kernel.org/r/20180118210159.17223-1-imxikangjie@gmail.com Fixes: 15f4eae70d36 ("x86: Move thread_info into task_struct") Signed-off-by: Xi Kangjie <imxikangjie@gmail.com> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Acked-by: Kieran Bingham <kbingham@kernel.org> Cc: <stable@vger.kernel.org> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-11-02License cleanup: add SPDX GPL-2.0 license identifier to files with no licenseGreg Kroah-Hartman1-0/+1
Many source files in the tree are missing licensing information, which makes it harder for compliance tools to determine the correct license. By default all files without license information are under the default license of the kernel, which is GPL version 2. Update the files which contain no license information with the 'GPL-2.0' SPDX license identifier. The SPDX identifier is a legally binding shorthand, which can be used instead of the full boiler plate text. This patch is based on work done by Thomas Gleixner and Kate Stewart and Philippe Ombredanne. How this work was done: Patches were generated and checked against linux-4.14-rc6 for a subset of the use cases: - file had no licensing information it it. - file was a */uapi/* one with no licensing information in it, - file was a */uapi/* one with existing licensing information, Further patches will be generated in subsequent months to fix up cases where non-standard license headers were used, and references to license had to be inferred by heuristics based on keywords. The analysis to determine which SPDX License Identifier to be applied to a file was done in a spreadsheet of side by side results from of the output of two independent scanners (ScanCode & Windriver) producing SPDX tag:value files created by Philippe Ombredanne. Philippe prepared the base worksheet, and did an initial spot review of a few 1000 files. The 4.13 kernel was the starting point of the analysis with 60,537 files assessed. Kate Stewart did a file by file comparison of the scanner results in the spreadsheet to determine which SPDX license identifier(s) to be applied to the file. She confirmed any determination that was not immediately clear with lawyers working with the Linux Foundation. Criteria used to select files for SPDX license identifier tagging was: - Files considered eligible had to be source code files. - Make and config files were included as candidates if they contained >5 lines of source - File already had some variant of a license header in it (even if <5 lines). All documentation files were explicitly excluded. The following heuristics were used to determine which SPDX license identifiers to apply. - when both scanners couldn't find any license traces, file was considered to have no license information in it, and the top level COPYING file license applied. For non */uapi/* files that summary was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 11139 and resulted in the first patch in this series. If that file was a */uapi/* path one, it was "GPL-2.0 WITH Linux-syscall-note" otherwise it was "GPL-2.0". Results of that was: SPDX license identifier # files ---------------------------------------------------|------- GPL-2.0 WITH Linux-syscall-note 930 and resulted in the second patch in this series. - if a file had some form of licensing information in it, and was one of the */uapi/* ones, it was denoted with the Linux-syscall-note if any GPL family license was found in the file or had no licensing in it (per prior point). Results summary: SPDX license identifier # files ---------------------------------------------------|------ GPL-2.0 WITH Linux-syscall-note 270 GPL-2.0+ WITH Linux-syscall-note 169 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-2-Clause) 21 ((GPL-2.0 WITH Linux-syscall-note) OR BSD-3-Clause) 17 LGPL-2.1+ WITH Linux-syscall-note 15 GPL-1.0+ WITH Linux-syscall-note 14 ((GPL-2.0+ WITH Linux-syscall-note) OR BSD-3-Clause) 5 LGPL-2.0+ WITH Linux-syscall-note 4 LGPL-2.1 WITH Linux-syscall-note 3 ((GPL-2.0 WITH Linux-syscall-note) OR MIT) 3 ((GPL-2.0 WITH Linux-syscall-note) AND MIT) 1 and that resulted in the third patch in this series. - when the two scanners agreed on the detected license(s), that became the concluded license(s). - when there was disagreement between the two scanners (one detected a license but the other didn't, or they both detected different licenses) a manual inspection of the file occurred. - In most cases a manual inspection of the information in the file resulted in a clear resolution of the license that should apply (and which scanner probably needed to revisit its heuristics). - When it was not immediately clear, the license identifier was confirmed with lawyers working with the Linux Foundation. - If there was any question as to the appropriate license identifier, the file was flagged for further research and to be revisited later in time. In total, over 70 hours of logged manual review was done on the spreadsheet to determine the SPDX license identifiers to apply to the source files by Kate, Philippe, Thomas and, in some cases, confirmation by lawyers working with the Linux Foundation. Kate also obtained a third independent scan of the 4.13 code base from FOSSology, and compared selected files where the other two scanners disagreed against that SPDX file, to see if there was new insights. The Windriver scanner is based on an older version of FOSSology in part, so they are related. Thomas did random spot checks in about 500 files from the spreadsheets for the uapi headers and agreed with SPDX license identifier in the files he inspected. For the non-uapi files Thomas did random spot checks in about 15000 files. In initial set of patches against 4.14-rc6, 3 files were found to have copy/paste license identifier errors, and have been fixed to reflect the correct identifier. Additionally Philippe spent 10 hours this week doing a detailed manual inspection and review of the 12,461 patched files from the initial patch version early this week with: - a full scancode scan run, collecting the matched texts, detected license ids and scores - reviewing anything where there was a license detected (about 500+ files) to ensure that the applied SPDX license was correct - reviewing anything where there was no detection but the patch license was not GPL-2.0 WITH Linux-syscall-note to ensure that the applied SPDX license was correct This produced a worksheet with 20 files needing minor correction. This worksheet was then exported into 3 different .csv files for the different types of files to be modified. These .csv files were then reviewed by Greg. Thomas wrote a script to parse the csv files and add the proper SPDX tag to the file, in the format that the file expected. This script was further refined by Greg based on the output to detect more types of files automatically and to distinguish between header and source .c files (which need different comment types.) Finally Greg ran the script using the .csv files to generate the patches. Reviewed-by: Kate Stewart <kstewart@linuxfoundation.org> Reviewed-by: Philippe Ombredanne <pombredanne@nexb.com> Reviewed-by: Thomas Gleixner <tglx@linutronix.de> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
2017-09-01kbuild: use $(abspath ...) instead of $(shell cd ... && /bin/pwd)Masahiro Yamada1-1/+1
Kbuild conventionally uses $(shell cd ... && /bin/pwd) idiom to get the absolute path of the directory because GNU Make 3.80, the minimal supported version at that time, did not support $(abspath ...) or $(realpath ...). Commit 37d69ee30808 ("docs: bump minimal GNU Make version to 3.81") dropped the GNU Make 3.80 support, so we are now allowed to use those make-builtin helpers. This conversion will provide better portability without relying on the pwd command or its location /bin/pwd. I am intentionally using $(realpath ...) instead $(abspath ...) in some places. The difference between the two is $(realpath ...) returns an empty string if the given path does not exist. It is convenient in places where we need to error-out if the makefile fails to create an output directory. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Acked-by: Thierry Reding <treding@nvidia.com>
2017-07-12scripts/gdb: lx-dmesg: use explicit encoding=utf8 errors=replaceLeonard Crestez1-3/+10
Use errors=replace because it is never desirable for lx-dmesg to fail on string decoding errors, not even if the log buffer is corrupt and we show incorrect info. The kernel will sometimes print utf8, for example the copyright symbol from jffs2. In order to make this work specify 'utf8' everywhere because python2 otherwise defaults to 'ascii'. In theory the second errors='replace' is not be required because everything that can be decoded as utf8 should also be encodable back to utf8. But it's better to be extra safe here. It's worth noting that this is definitely not true for encoding='ascii', unknown characters are replaced with U+FFFD REPLACEMENT CHARACTER and they fail to encode back to ascii. Link: http://lkml.kernel.org/r/acee067f3345954ed41efb77b80eebdc038619c6.1498481469.git.leonard.crestez@nxp.com Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kieran@ksquared.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-12scripts/gdb: lx-dmesg: cast log_buf to void* for addr fetchLeonard Crestez1-1/+1
In some cases it is possible for the str() conversion here to throw encoding errors because log_buf might not point to valid ascii. For example: (gdb) python print str(gdb.parse_and_eval("log_buf")) Traceback (most recent call last): File "<string>", line 1, in <module> UnicodeEncodeError: 'ascii' codec can't encode character u'\u0303' in position 24: ordinal not in range(128) Avoid this by explicitly casting to (void *) inside the gdb expression. Link: http://lkml.kernel.org/r/ba6f85dbb02ca980ebd0e2399b0649423399b565.1498481469.git.leonard.crestez@nxp.com Signed-off-by: Leonard Crestez <leonard.crestez@nxp.com> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Cc: Jason Wessel <jason.wessel@windriver.com> Cc: Kieran Bingham <kieran@ksquared.org.uk> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-07-12scripts/gdb: add lx-fdtdump commandPeter Griffin2-0/+80
lx-fdtdump dumps the flattened device tree passed to the kernel from the bootloader to the filename specified as the command argument. If no argument is provided it defaults to fdtdump.dtb. This then allows further post processing on the machine running GDB. The fdt header is also also printed in the GDB console. For example: (gdb) lx-fdtdump fdt_magic: 0xD00DFEED fdt_totalsize: 0xC108 off_dt_struct: 0x38 off_dt_strings: 0x3804 off_mem_rsvmap: 0x28 version: 17 last_comp_version: 16 Dumped fdt to fdtdump.dtb >fdtdump fdtdump.dtb | less This command is useful as the bootloader can often re-write parts of the device tree, and this can sometimes cause the kernel to not boot. Link: http://lkml.kernel.org/r/1481280065-5336-2-git-send-email-kbingham@kernel.org Signed-off-by: Peter Griffin <peter.griffin@linaro.org> Signed-off-by: Kieran Bingham <kbingham@kernel.org> Cc: Jason Wessel <jason.wessel@windriver.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2017-06-02scripts/gdb: make lx-dmesg command work (reliably)André Draszik1-4/+5
lx-dmesg needs access to the log_buf symbol from printk.c. Unfortunately, the symbol log_buf also exists in BPF's verifier.c and hence gdb can pick one or the other. If it happens to pick BPF's log_buf, lx-dmesg doesn't work: (gdb) lx-dmesg Python Exception <class 'gdb.MemoryError'> Cannot access memory at address 0x0: Error occurred in Python command: Cannot access memory at address 0x0 (gdb) p log_buf $15 = 0x0 Luckily, GDB has a way to deal with this, see https://sourceware.org/gdb/onlinedocs/gdb/Symbols.html (gdb) info variables ^log_buf$ All variables matching regular expression "^log_buf$": File <linux.git>/kernel/bpf/verifier.c: static char *log_buf; File <linux.git>/kernel/printk/printk.c: static char *log_buf; (gdb) p 'verifier.c'::log_buf $1 = 0x0 (gdb) p 'printk.c'::log_buf $2 = 0x811a6aa0 <__log_buf> "" (gdb) p &log_buf $3 = (char **) 0x8120fe40 <log_buf> (gdb) p &'verifier.c'::log_buf $4 = (char **) 0x8120fe40 <log_buf> (gdb) p &'printk.c'::log_buf $5 = (char **) 0x8048b7d0 <log_buf> By being explicit about the location of the symbol, we can make lx-dmesg work again. While at it, do the same for the other symbols we need from printk.c Link: http://lkml.kernel.org/r/20170526112222.3414-1-git@andred.net Signed-off-by: André Draszik <git@andred.net> Tested-by: Kieran Bingham <kieran@bingham.xyz> Acked-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15Revert "scripts/gdb: add a Radix Tree Parser"Kieran Bingham3-105/+0
This reverts commit e127a73d41ac ("scripts/gdb: add a Radix Tree Parser") The python implementation of radix-tree was merged at the same time as the radix-tree system was heavily reworked from commit e9256efcc8e3 ("radix-tree: introduce radix_tree_empty") to 3bcadd6fa6c4 ("radix-tree: free up the bottom bit of exceptional entries for reuse") and no longer functions, but also prevents other gdb scripts from loading. This functionality has not yet hit a release, so simply remove it for now Link: http://lkml.kernel.org/r/1467127337-11135-6-git-send-email-kieran@bingham.xyz Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15scripts/gdb: Perform path expansion to lx-symbol's argumentsNikolay Borisov1-1/+1
Python doesn't do automatic expansion of paths. In case one passes path of the from ~/foo/bar the gdb scripts won't automatically expand that and as a result the symbols files won't be loaded. Fix this by explicitly expanding all paths which begin with "~" Link: http://lkml.kernel.org/r/1467127337-11135-5-git-send-email-kieran@bingham.xyz Signed-off-by: Nikolay Borisov <n.borisov.lkml@gmail.com> Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Reviewed-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15scripts/gdb: add constants.py to .gitignoreOmar Sandoval1-0/+1
Since scripts/gdb/linux/constants.py is autogenerated, this should have been added to .gitignore when it was introduced. Fixes: f197d75fcad1 ("scripts/gdb: provide linux constants") Link: http://lkml.kernel.org/r/1467127337-11135-4-git-send-email-kieran@bingham.xyz Signed-off-by: Omar Sandoval <osandov@fb.com> Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15scripts/gdb: rebuild constants.py on dependancy changeKieran Bingham1-2/+3
The autogenerated constants.py file was only being built on the initial call, and if the constants.py.in file changed. As we are utilising the CPP hooks, we can successfully use the call if_changed_dep rules to determine when to rebuild the file based on it's inclusions. Link: http://lkml.kernel.org/r/1467127337-11135-3-git-send-email-kieran@bingham.xyz Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Reported-by: Jan Kiszka <jan.kiszka@web.de> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-07-15scripts/gdb: silence 'nothing to do' messageKieran Bingham1-0/+1
The constants.py generation, involves a rule to link into the main makefile. This rule has no command and generates a spurious warning message in the build logs when CONFIG_SCRIPTS_GDB is enabled. Fix simply by giving a no-op action Link: http://lkml.kernel.org/r/1467127337-11135-2-git-send-email-kieran@bingham.xyz Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Reported-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: decode bytestream on dmesg for Python3Kieran Bingham1-2/+2
The recent fixes to lx-dmesg, now allow the command to print successfully on Python3, however the python interpreter wraps the bytes for each line with a b'<text>' marker. To remove this, we need to decode the line, where .decode() will default to 'UTF-8' Link: http://lkml.kernel.org/r/d67ccf93f2479c94cb3399262b9b796e0dbefcf2.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Acked-by: Dom Cote <buzdelabuz2@gmail.com> Tested-by: Dom Cote <buzdelabuz2@gmail.com> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: fix issue with dmesg.py and python 3.XDom Cote1-3/+4
When built against Python 3, GDB differs in the return type for its read_memory function, causing the lx-dmesg command to fail. Now that we have an improved read_16() we can use the new read_memoryview() abstraction to make lx-dmesg return valid data on both current Python APIs Tested with python 3.4 and 2.7 Tested with gdb 7.7 Link: http://lkml.kernel.org/r/28477b727ff7fe3101fd4e426060e8a68317a639.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Dom Cote <buzdelabuz2+git@gmail.com> [kieran@bingham.xyz: Adjusted commit log to better reflect code changes] Tested-by: Kieran Bingham <kieran@bingham.xyz> (Py2.7,Py3.4,GDB10) Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: improve types abstraction for gdb python scriptsDom Cote1-2/+15
Change the read_u16 function so it accepts both 'str' and 'byte' as type for the arguments. When calling read_memory() from gdb API, depending on if it was built with 2.7 or 3.X, the format used to return the data will differ ( 'str' for 2.7, and 'byte' for 3.X ). Add a function read_memoryview() to be able to get a 'memoryview' object back from read_memory() both with python 2.7 and 3.X . Tested with python 3.4 and 2.7 Tested with gdb 7.7 Link: http://lkml.kernel.org/r/73621f564503137a002a639d174e4fb35f73f462.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Dom Cote <buzdelabuz2+git@gmail.com> Tested-by: Kieran Bingham <kieran@bingham.xyz> (Py2.7,Py3.4,GDB10) Signed-off-by: Kieran Bingham <kieran@bingham.xyz> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: add lx_thread_info_by_pid helperKieran Bingham1-0/+19
The tasks module already provides helpers to find the task struct by pid, and the thread_info by task struct; however this is cumbersome to utilise on the gdb commandline. Wrap these two functionalities together in an extra single helper to allow exploring the thread info, from a PID value Link: http://lkml.kernel.org/r/dadc5667f053ec811eb3e3033d99d937fedbc93b.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: add a Radix Tree ParserKieran Bingham3-0/+105
Linux makes use of the Radix Tree data structure to store pointers indexed by integer values. This structure is utilised across many structures in the kernel including the IRQ descriptor tables, and several filesystems. This module provides a method to lookup values from a structure given its head node. Usage: The function lx_radix_tree_lookup, must be given a symbol of type struct radix_tree_root, and an index into that tree. The object returned is a generic integer value, and must be cast correctly to the type based on the storage in the data structure. For example, to print the irq descriptor in the sparse irq_desc_tree at index 18, try the following: (gdb) print (struct irq_desc)$lx_radix_tree_lookup(irq_desc_tree, 18) Link: http://lkml.kernel.org/r/d2028c55e50cf95a9b7f8ca0d11885174b0cc709.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: cast CPU numbers to integerJan Kiszka1-1/+1
We won't see more than 2 billion CPUs any time soon, and having cpu_list return long makes the output of lx-cpus a bit ugly. Link: http://lkml.kernel.org/r/dcb45c3b0a59e0fd321fa56ff7aa398458c689b3.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: add cpu iteratorsKieran Bingham1-0/+38
The linux kernel provides macro's for iterating against values from the cpu_list masks. By providing some commonly used masks, we can mirror the kernels helper macros with easy to use generators. Link: http://lkml.kernel.org/r/d045c6599771ada1999d49612ee30fd2f9acf17f.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: add mount point list commandKieran Bingham2-0/+119
lx-mounts will identify current mount points based on the 'init_task' namespace by default, as we do not yet have a kernel thread list implementation to select the current running thread. Optionally, a user can specify a PID to list from that process' namespace Link: http://lkml.kernel.org/r/e614c7bc32d2350b4ff1627ec761a7148e65bfe6.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: add io resource readersKieran Bingham1-0/+57
Provide iomem_resource and ioports_resource printers and command hooks It can be quite interesting to halt the kernel as it's booting and check to see this list as it is being populated. It should be useful in the event that a kernel is not booting, you can identify what memory resources have been registered Link: http://lkml.kernel.org/r/f0a6b9fa9c92af4d7ed2e7343ccc84150e9c6fc5.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: provide a dentry_name VFS path helperKieran Bingham1-0/+8
Walk the VFS entries, pre-pending the iname strings to generate a full VFS path name from a dentry. Link: http://lkml.kernel.org/r/4328fdb2d15ba7f1b21ad21c2eecc38d9cfc4d13.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
2016-05-23scripts/gdb: support !CONFIG_MODULES gracefullyKieran Bingham1-1/+4
If CONFIG_MODULES is not enabled, lx-lsmod tries to find a non-existent symbol and generates an unfriendly traceback: (gdb) lx-lsmod Address Module Size Used by Traceback (most recent call last): File "scripts/gdb/linux/modules.py", line 75, in invoke for module in module_list(): File "scripts/gdb/linux/modules.py", line 24, in module_list module_ptr_type = module_type.get_type().pointer() File "scripts/gdb/linux/utils.py", line 28, in get_type self._type = gdb.lookup_type(self._name) gdb.error: No struct type named module. Error occurred in Python command: No struct type named module. Catch the error and return an empty module_list() for a clean command output as follows: (gdb) lx-lsmod Address Module Size Used by (gdb) Link: http://lkml.kernel.org/r/94d533819437408b85ae5864f939dd7ca6fbfcd6.1462865983.git.jan.kiszka@siemens.com Signed-off-by: Kieran Bingham <kieran.bingham@linaro.org> Signed-off-by: Jan Kiszka <jan.kiszka@siemens.com> Signed-off-by: Andrew Morton <akpm@linux-foundation.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
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