linux/scripts/gdb, branch v6.3

Merge tag 'mm-nonmm-stable-2023-02-20-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2023-02-24T01:55:40Z

Pull non-MM updates from Andrew Morton: "There is no particular theme here - mainly quick hits all over the tree. Most notable is a set of zlib changes from Mikhail Zaslonko which enhances and fixes zlib's use of S390 hardware support: 'lib/zlib: Set of s390 DFLTCC related patches for kernel zlib'" * tag 'mm-nonmm-stable-2023-02-20-15-29' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (55 commits) Update CREDITS file entry for Jesper Juhl sparc: allow PM configs for sparc32 COMPILE_TEST hung_task: print message when hung_task_warnings gets down to zero. arch/Kconfig: fix indentation scripts/tags.sh: fix the Kconfig tags generation when using latest ctags nilfs2: prevent WARNING in nilfs_dat_commit_end() lib/zlib: remove redundation assignement of avail_in dfltcc_gdht() lib/Kconfig.debug: do not enable DEBUG_PREEMPT by default lib/zlib: DFLTCC always switch to software inflate for Z_PACKET_FLUSH option lib/zlib: DFLTCC support inflate with small window lib/zlib: Split deflate and inflate states for DFLTCC lib/zlib: DFLTCC not writing header bits when avail_out == 0 lib/zlib: fix DFLTCC ignoring flush modes when avail_in == 0 lib/zlib: fix DFLTCC not flushing EOBS when creating raw streams lib/zlib: implement switching between DFLTCC and software lib/zlib: adjust offset calculation for dfltcc_state nilfs2: replace WARN_ONs for invalid DAT metadata block requests scripts/spelling.txt: add "exsits" pattern and fix typo instances fs: gracefully handle ->get_block not mapping bh in __mpage_writepage cramfs: Kconfig: fix spelling & punctuation ...

scripts/gdb: fix 'lx-current' for x86

2023-02-09T23:56:51Z

When printing the name of the current process, it will report an error: (gdb) p $lx_current().comm Python Exception No symbol "current_task" in current context.: Error occurred in Python: No symbol "current_task" in current context. Because e57ef2ed97c1 ("x86: Put hot per CPU variables into a struct") changed it. Link: https://lkml.kernel.org/r/20230204090139.1789264-1-xiehuan09@gmail.com Fixes: e57ef2ed97c1 ("x86: Put hot per CPU variables into a struct") Signed-off-by: Jeff Xie Cc: Jan Kiszka Cc: Signed-off-by: Andrew Morton

scripts/gdb: add mm introspection utils

2023-02-03T06:50:03Z

This command provides a way to traverse the entire page hierarchy by a given virtual address on x86. In addition to qemu's commands info tlb/info mem it provides the complete information about the paging structure for an arbitrary virtual address. It supports 4KB/2MB/1GB and 5 level paging. Here is an example output for 2MB success translation: (gdb) translate-vm address cr3: cr3 binary data 0x1085be003 next entry physical address 0x1085be000 --- bit 3 page level write through False bit 4 page level cache disabled False level 4: entry address 0xffff8881085be7f8 page entry binary data 0x800000010ac83067 next entry physical address 0x10ac83000 --- bit 0 entry present True bit 1 read/write access allowed True bit 2 user access allowed True bit 3 page level write through False bit 4 page level cache disabled False bit 5 entry has been accessed True bit 7 page size False bit 11 restart to ordinary False bit 63 execute disable True level 3: entry address 0xffff88810ac83a48 page entry binary data 0x101af7067 next entry physical address 0x101af7000 --- bit 0 entry present True bit 1 read/write access allowed True bit 2 user access allowed True bit 3 page level write through False bit 4 page level cache disabled False bit 5 entry has been accessed True bit 7 page size False bit 11 restart to ordinary False bit 63 execute disable False level 2: entry address 0xffff888101af7368 page entry binary data 0x80000001634008e7 page size 2MB page physical address 0x163400000 --- bit 0 entry present True bit 1 read/write access allowed True bit 2 user access allowed True bit 3 page level write through False bit 4 page level cache disabled False bit 5 entry has been accessed True bit 7 page size True bit 6 page dirty True bit 8 global translation False bit 11 restart to ordinary True bit 12 pat False bits (59, 62) protection key 0 bit 63 execute disable True [dmitrii.bundin.a@gmail.com: add SPDX line, other tweaks] Link: https://lkml.kernel.org/r/20230113175151.22278-1-dmitrii.bundin.a@gmail.com [akpm@linux-foundation.org: s/physicall/physical/] Link: https://lkml.kernel.org/r/20230102171014.31408-1-dmitrii.bundin.a@gmail.com Signed-off-by: Dmitrii Bundin Acked by: Mike Rapoport (IBM) Cc: Greg Kroah-Hartman Cc: Ingo Molnar Cc: Jan Kiszka Cc: Kieran Bingham Cc: Vlastimil Babka Signed-off-by: Andrew Morton

Merge tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm

2022-08-07T17:03:24Z

Pull misc updates from Andrew Morton: "Updates to various subsystems which I help look after. lib, ocfs2, fatfs, autofs, squashfs, procfs, etc. A relatively small amount of material this time" * tag 'mm-nonmm-stable-2022-08-06-2' of git://git.kernel.org/pub/scm/linux/kernel/git/akpm/mm: (72 commits) scripts/gdb: ensure the absolute path is generated on initial source MAINTAINERS: kunit: add David Gow as a maintainer of KUnit mailmap: add linux.dev alias for Brendan Higgins mailmap: update Kirill's email profile: setup_profiling_timer() is moslty not implemented ocfs2: fix a typo in a comment ocfs2: use the bitmap API to simplify code ocfs2: remove some useless functions lib/mpi: fix typo 'the the' in comment proc: add some (hopefully) insightful comments bdi: remove enum wb_congested_state kernel/hung_task: fix address space of proc_dohung_task_timeout_secs lib/lzo/lzo1x_compress.c: replace ternary operator with min() and min_t() squashfs: support reading fragments in readahead call squashfs: implement readahead squashfs: always build "file direct" version of page actor Revert "squashfs: provide backing_dev_info in order to disable read-ahead" fs/ocfs2: Fix spelling typo in comment ia64: old_rr4 added under CONFIG_HUGETLB_PAGE proc: fix test for "vsyscall=xonly" boot option ...

Merge tag 'printk-for-5.20-sane' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux

2022-08-05T16:54:36Z

Pull printk updates from Petr Mladek: - Allow reading kernel log in gdb even on 32 bits systems - More granular check of the buffer usage in printf selftest - Clang warning fix * tag 'printk-for-5.20-sane' of git://git.kernel.org/pub/scm/linux/kernel/git/printk/linux: lib/test_printf.c: fix clang -Wformat warnings scripts/gdb: fix 'lx-dmesg' on 32 bits arch lib/test_printf.c: split write-beyond-buffer check in two

scripts/gdb: ensure the absolute path is generated on initial source

2022-07-30T01:12:37Z

Post 'make scripts_gdb' a symbolic link to scripts/gdb/vmlinux-gdb.py is created. Currently 'os.path.dirname(__file__)' does not generate the absolute path to scripts/gdb resulting in the following: (gdb) source vmlinux-gdb.py Traceback (most recent call last): File "scripts/gdb/vmlinux-gdb.py", line 25, in import linux.utils ModuleNotFoundError: No module named 'linux' This patch ensures that the absolute path to scripts/gdb in relation to the given file is generated so each module can be located accordingly. Link: https://lkml.kernel.org/r/20220712110248.1404125-1-atomlin@redhat.com Signed-off-by: Aaron Tomlin Reviewed-by: Douglas Anderson Cc: Jan Kiszka Cc: Kieran Bingham Signed-off-by: Andrew Morton

scripts/gdb: Fix gdb 'lx-symbols' command

2022-07-21T17:40:55Z

Currently the command 'lx-symbols' in gdb exits with the error`Function "do_init_module" not defined in "kernel/module.c"`. This occurs because the file kernel/module.c was moved to kernel/module/main.c. Fix this breakage by changing the path to "kernel/module/main.c" in LoadModuleBreakpoint. Signed-off-by: Khalid Masum Acked-by: Luis Chamberlain Fixes: cfc1d277891e ("module: Move all into module/") Reviewed-by: Douglas Anderson Signed-off-by: Linus Torvalds

scripts/gdb: fix 'lx-dmesg' on 32 bits arch

2022-07-21T13:32:52Z

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 : 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: e60768311af8 ("scripts/gdb: update for lockless printk ringbuffer") Signed-off-by: Antonio Borneo [pmladek@suse.com: Query the really used atomic_long_t counter type size] Tested-by: Antonio Borneo Reviewed-by: John Ogness Signed-off-by: Petr Mladek Link: https://lore.kernel.org/r/20220719122831.19890-1-pmladek@suse.com

scripts/gdb: change kernel config dumping method

2022-06-11T09:31:53Z

MAGIC_START("IKCFG_ST") and MAGIC_END("IKCFG_ED") are moved out from the kernel_config_data variable. Thus, we parse kernel_config_data directly instead of considering offset of MAGIC_START and MAGIC_END. Fixes: 13610aa908dc ("kernel/configs: use .incbin directive to embed config_data.gz") Signed-off-by: Kuan-Ying Lee Signed-off-by: Masahiro Yamada

scripts/gdb: lx-dmesg: read records individually

2021-12-16T14:52:38Z

For the gdb command lx-dmesg, the entire descriptor, info, and text data regions are read into memory before printing any records. For large kernel log buffers, this not only causes a huge delay before seeing any records, but it may also lead to python errors of too much memory allocation. Rather than reading in all these regions in advance, read them as needed and only read the regions for the particular record that is being printed. The gdb macro "dmesg" in Documentation/admin-guide/kdump/gdbmacros.txt already prints out the kernel log buffer like this. Signed-off-by: John Ogness Signed-off-by: Petr Mladek Link: https://lore.kernel.org/r/874k79c3a9.fsf@jogness.linutronix.de