gdb: lx-symbols: do not error out on monolithic build

This avoids spurious message:
(gdb) lx-symbols
loading vmlinux
No source file named kernel/module/main.c.

Link: https://lkml.kernel.org/r/Zy5AL

gdb: lx-symbols: do not error out on monolithic build

This avoids spurious message:
(gdb) lx-symbols
loading vmlinux
No source file named kernel/module/main.c.

Link: https://lkml.kernel.org/r/Zy5ALByQtpO-ddh4@Z926fQmE5jqhFMgp6
Signed-off-by: Etienne Buira <[email protected]>
Cc: Andrew Ballance <[email protected]>
Cc: Kieran Bingham <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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scripts/gdb/modules: add get module text support

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 kerne

scripts/gdb/modules: add get module text support

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

Link: https://lkml.kernel.org/r/[email protected]
Signed-off-by: Kuan-Ying Lee <[email protected]>
Cc: AngeloGioacchino Del Regno <[email protected]>
Cc: Chinwen Chang <[email protected]>
Cc: Matthias Brugger <[email protected]>
Cc: Qun-Wei Lin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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scripts/gdb: fix 'lx-lsmod' show the wrong size

'lsmod' shows total core layout size, so we need to sum up all the
sections in core layout in gdb scripts.

/ # lsmod
kasan_test 200704 0 - Live 0xfff

scripts/gdb: fix 'lx-lsmod' show the wrong size

'lsmod' shows total core layout size, so we need to sum up all the
sections in core layout in gdb scripts.

/ # lsmod
kasan_test 200704 0 - Live 0xffff80007f640000

Before patch:
(gdb) lx-lsmod
Address Module Size Used by
0xffff80007f640000 kasan_test 36864 0

After patch:
(gdb) lx-lsmod
Address Module Size Used by
0xffff80007f640000 kasan_test 200704 0

Link: https://lkml.kernel.org/r/[email protected]
Fixes: b4aff7513df3 ("scripts/gdb: use mem instead of core_layout to get the module address")
Signed-off-by: Kuan-Ying Lee <[email protected]>
Reviewed-by: Pankaj Raghav <[email protected]>
Cc: AngeloGioacchino Del Regno <[email protected]>
Cc: Chinwen Chang <[email protected]>
Cc: Jan Kiszka <[email protected]>
Cc: Kieran Bingham <[email protected]>
Cc: Luis Chamberlain <[email protected]>
Cc: Matthias Brugger <[email protected]>
Cc: Qun-Wei Lin <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>

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scripts/gdb: use mem instead of core_layout to get the module address

commit ac3b43283923 ("module: replace module_layout with module_memory")
changed the struct module data structure from module_la

scripts/gdb: use mem instead of core_layout to get the module address

commit ac3b43283923 ("module: replace module_layout with module_memory")
changed the struct module data structure from module_layout to
module_memory. The core_layout member which is used while loading
modules are not available anymore leading to the following error while
running gdb:

(gdb) lx-symbols
loading vmlinux
Python Exception <class 'gdb.error'>: There is no member named core_layout.
Error occurred in Python: There is no member named core_layout.

Replace core_layout with its new counterpart mem[MOD_TEXT].

Fixes: ac3b43283923 ("module: replace module_layout with module_memory")
Signed-off-by: Pankaj Raghav <[email protected]>
Signed-off-by: Luis Chamberlain <[email protected]>

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scripts/gdb: support !CONFIG_MODULES gracefully

If CONFIG_MODULES is not enabled, lx-lsmod tries to find a non-existent
symbol and generates an unfriendly traceback:

(gdb) lx-lsmod
Address M

scripts/gdb: support !CONFIG_MODULES gracefully

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 <[email protected]>
Signed-off-by: Jan Kiszka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: convert modules usage to lists functions

Simplify the module list functions with the new list_for_each_entry
abstractions

Link: http://lkml.kernel.org/r/ad0101c9391088608166fcec26af179

scripts/gdb: convert modules usage to lists functions

Simplify the module list functions with the new list_for_each_entry
abstractions

Link: http://lkml.kernel.org/r/ad0101c9391088608166fcec26af179868973d86.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Kieran Bingham <[email protected]>
Signed-off-by: Jan Kiszka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: Adjust module reference counter reported by lx-lsmod

This takes the MODULE_REF_BASE into account.

Link: http://lkml.kernel.org/r/d926d2d54caa034adb964b52215090cbdb875249.1462865983.git

scripts/gdb: Adjust module reference counter reported by lx-lsmod

This takes the MODULE_REF_BASE into account.

Link: http://lkml.kernel.org/r/d926d2d54caa034adb964b52215090cbdb875249.1462865983.git.jan.kiszka@siemens.com
Signed-off-by: Jan Kiszka <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: account for changes in module data structure

Commit 7523e4dc5057 ("module: use a structure to encapsulate layout.")
factored out the module_layout structure. Adjust the symbol loader a

scripts/gdb: account for changes in module data structure

Commit 7523e4dc5057 ("module: use a structure to encapsulate layout.")
factored out the module_layout structure. Adjust the symbol loader and
the lsmod command to this.

Signed-off-by: Jan Kiszka <[email protected]>
Reviewed-by: Kieran Bingham <[email protected]>
Tested-by: Kieran Bingham <[email protected]> (qemu-{ARM,x86})
Cc: Rusty Russell <[email protected]>
Cc: Jiri Kosina <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: <[email protected]> [4.4+]
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: fix lx-lsmod refcnt

Commit 2f35c41f58a9 ("module: Replace module_ref with atomic_t refcnt")
changes the way refcnt is handled but did not update the gdb script to
use the new variable.

scripts/gdb: fix lx-lsmod refcnt

Commit 2f35c41f58a9 ("module: Replace module_ref with atomic_t refcnt")
changes the way refcnt is handled but did not update the gdb script to
use the new variable.

Since refcnt is not per-cpu anymore, we can directly read its value.

Signed-off-by: Adrien Schildknecht <[email protected]>
Reviewed-by: Jan Kiszka <[email protected]>
Cc: Pantelis Koukousoulas <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: convert CpuList to generator function

Yet another code simplification.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <jas

scripts/gdb: convert CpuList to generator function

Yet another code simplification.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: convert ModuleList to generator function

Analogously to the task list, convert the module list to a generator
function. It noticeably simplifies the code.

Signed-off-by: Jan Kiszka <j

scripts/gdb: convert ModuleList to generator function

Analogously to the task list, convert the module list to a generator
function. It noticeably simplifies the code.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: port to python3 / gdb7.7

I tried to use these scripts in an ubuntu 14.04 host (gdb 7.7 compiled
against python 3.3) but there were several errors.

I believe this patch fixes these issu

scripts/gdb: port to python3 / gdb7.7

I tried to use these scripts in an ubuntu 14.04 host (gdb 7.7 compiled
against python 3.3) but there were several errors.

I believe this patch fixes these issues so that the commands now work (I
tested lx-symbols, lx-dmesg, lx-lsmod).

Main issues that needed to be resolved:

* In python 2 iterators have a "next()" method. In python 3 it is
__next__() instead (so let's just add both).

* In older python versions there was an implicit conversion
in object.__format__() (used when an object is in string.format())
where it was converting the object to str first and then
calling str's __format__(). This has now been removed so
we must explicitly convert to str the objects for which
we need to keep this behavior.

* In dmesg.py: in python 3 log_buf is now a "memoryview" object
which needs to be converted to a string in order to use string
methods like "splitlines()". Luckily memoryview exists in
python 2.7.6 as well, so we can convert log_buf to memoryview
and use the same code in both python 2 and python 3.

This version of the patch has now been tested with gdb 7.7 and both python
3.4 and python 2.7.6 (I think asking for at least python 2.7.6 is a
reasonable requirement instead of complicating the code with version
checks etc).

Signed-off-by: Pantelis Koukousoulas <[email protected]>
Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: add lx-lsmod command

This adds a lsmod-like command to list all currently loaded modules of the
target.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <tglx@lin

scripts/gdb: add lx-lsmod command

This adds a lsmod-like command to list all currently loaded modules of the
target.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: add internal helper and convenience function to look up a module

Add the internal helper get_module_by_name to obtain the module structure
corresponding to the given name. Also export

scripts/gdb: add internal helper and convenience function to look up a module

Add the internal helper get_module_by_name to obtain the module structure
corresponding to the given name. Also export this service as a
convenience function.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

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scripts/gdb: add module iteration class

Will soon be used for loading symbols, printing global variables or
listing modules.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <

scripts/gdb: add module iteration class

Will soon be used for loading symbols, printing global variables or
listing modules.

Signed-off-by: Jan Kiszka <[email protected]>
Cc: Thomas Gleixner <[email protected]>
Cc: Jason Wessel <[email protected]>
Cc: Andi Kleen <[email protected]>
Cc: Ben Widawsky <[email protected]>
Cc: Borislav Petkov <[email protected]>
Signed-off-by: Andrew Morton <[email protected]>
Signed-off-by: Linus Torvalds <[email protected]>

show more ...