linux-toradex.git/scripts/gcc-plugins, branch v5.16-rc3

Merge tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm

2021-11-02T18:33:15+00:00

Pull ARM updates from Russell King:

 - Rejig task/thread info to place thread info in task struct

 - Amba bus cleanups (removing unused functions)

 - Handle Amba device probe without IRQ domains

 - Parse linux,usable-memory-range in decompressor

 - Mark OCRAM as read-only after initialisation

 - Refactor page fault handling

 - Fix PXN handling with LPAE kernels

 - Warning and build fixes from Arnd

* tag 'for-linus' of git://git.armlinux.org.uk/~rmk/linux-arm: (32 commits)
  ARM: 9151/1: Thumb2: avoid __builtin_thread_pointer() on Clang
  ARM: 9150/1: Fix PID_IN_CONTEXTIDR regression when THREAD_INFO_IN_TASK=y
  ARM: 9147/1: add printf format attribute to early_print()
  ARM: 9146/1: RiscPC needs older gcc version
  ARM: 9145/1: patch: fix BE32 compilation
  ARM: 9144/1: forbid ftrace with clang and thumb2_kernel
  ARM: 9143/1: add CONFIG_PHYS_OFFSET default values
  ARM: 9142/1: kasan: work around LPAE build warning
  ARM: 9140/1: allow compile-testing without machine record
  ARM: 9137/1: disallow CONFIG_THUMB with ARMv4
  ARM: 9136/1: ARMv7-M uses BE-8, not BE-32
  ARM: 9135/1: kprobes: address gcc -Wempty-body warning
  ARM: 9101/1: sa1100/assabet: convert LEDs to gpiod APIs
  ARM: 9131/1: mm: Fix PXN process with LPAE feature
  ARM: 9130/1: mm: Provide die_kernel_fault() helper
  ARM: 9126/1: mm: Kill page table base print in show_pte()
  ARM: 9127/1: mm: Cleanup access_error()
  ARM: 9129/1: mm: Kill task_struct argument for __do_page_fault()
  ARM: 9128/1: mm: Refactor the __do_page_fault()
  ARM: imx6: mark OCRAM mapping read-only
  ...

gcc-plugins: remove duplicate include in gcc-common.h

2021-10-21T15:41:51+00:00

'tree-ssa-operands.h' included in 'gcc-common.h' is duplicated.
it's also included at line 56.

Reported-by: Zeal Robot 
Signed-off-by: Ye Guojin 
Signed-off-by: Kees Cook 
Link: https://lore.kernel.org/r/20211019082910.998257-1-ye.guojin@zte.com.cn

gcc-plugins: Remove cyc_complexity

2021-10-21T15:41:47+00:00

This plugin has no impact on the resulting binary, is disabled
under COMPILE_TEST, and is not enabled on any builds I'm aware of.
Additionally, given the clarified purpose of GCC plugins in the kernel,
remove cyc_complexity.

Cc: Masahiro Yamada 
Cc: Michal Marek 
Cc: Nick Desaulniers 
Cc: Jonathan Corbet 
Cc: linux-hardening@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Signed-off-by: Kees Cook 
Reviewed-by: Miguel Ojeda 
Reviewed-by: Nathan Chancellor 
Acked-by: Nick Desaulniers 
Acked-by: Ard Biesheuvel 
Link: https://lore.kernel.org/r/20211020173554.38122-3-keescook@chromium.org

gcc-plugins: Explicitly document purpose and deprecation schedule

2021-10-21T15:41:38+00:00

GCC plugins should only exist when some compiler feature needs to be
proven but does not exist in either GCC nor Clang. For example, if a
desired feature is already in Clang, it should be added to GCC upstream.
Document this explicitly.

Additionally, mark the plugins with matching upstream GCC features as
removable past their respective GCC versions.

Cc: Masahiro Yamada 
Cc: Michal Marek 
Cc: Nick Desaulniers 
Cc: Jonathan Corbet 
Cc: James Morris 
Cc: "Serge E. Hallyn" 
Cc: Nathan Chancellor 
Cc: linux-hardening@vger.kernel.org
Cc: linux-kbuild@vger.kernel.org
Cc: linux-doc@vger.kernel.org
Cc: linux-security-module@vger.kernel.org
Cc: llvm@lists.linux.dev
Signed-off-by: Kees Cook 
Reviewed-by: Nathan Chancellor 
Reviewed-by: Miguel Ojeda 
Acked-by: Nick Desaulniers 
Acked-by: Ard Biesheuvel 
Link: https://lore.kernel.org/r/20211020173554.38122-2-keescook@chromium.org

gcc-plugins: remove support for GCC 4.9 and older

2021-10-04T17:58:08+00:00

The minimum GCC version has been bumped to 5.1, so we can get rid of all
the compatibility code for anything older than that.

Signed-off-by: Ard Biesheuvel 
Signed-off-by: Kees Cook 
Link: https://lore.kernel.org/r/20210922182632.633394-1-ardb@kernel.org

gcc-plugins: arm-ssp: Prepare for THREAD_INFO_IN_TASK support

2021-09-27T14:54:01+00:00

We will be enabling THREAD_INFO_IN_TASK support for ARM, which means
that we can no longer load the stack canary value by masking the stack
pointer and taking the copy that lives in thread_info. Instead, we will
be able to load it from the task_struct directly, by using the TPIDRURO
register which will hold the current task pointer when
THREAD_INFO_IN_TASK is in effect. This is much more straight-forward,
and allows us to declutter this code a bit while at it.

Note that this means that ARMv6 (non-v6K) SMP systems can no longer use
this feature, but those are quite rare to begin with, so this is a
reasonable trade off.

Reviewed-by: Kees Cook 
Signed-off-by: Ard Biesheuvel 
Reviewed-by: Linus Walleij 
Tested-by: Amit Daniel Kachhap

scripts: make some scripts executable

2021-08-10T00:13:25+00:00

Set the x bit to some scripts to make them directly executable.

Especially, scripts/checkdeclares.pl is not hooked by anyone.
It should be executable since it is tedious to type
'perl scripts/checkdeclares.pl'.

The original patch [1] set the x bit properly, but it was lost when
it was merged as commit 21917bded72c ("scripts: a new script for
checking duplicate struct declaration").

[1] https://lore.kernel.org/lkml/20210401110943.1010796-1-wanjiabing@vivo.com/

Signed-off-by: Masahiro Yamada

.gitignore: prefix local generated files with a slash

2021-05-01T15:43:35+00:00

The pattern prefixed with '/' matches files in the same directory,
but not ones in sub-directories.

Signed-off-by: Masahiro Yamada 
Acked-by: Miguel Ojeda 
Acked-by: Rob Herring 
Acked-by: Andra Paraschiv 
Acked-by: Greg Kroah-Hartman 
Acked-by: Gabriel Krisman Bertazi

kbuild: rebuild GCC plugins when the compiler is upgraded

2021-03-11T05:40:50+00:00

Linus reported a build error due to the GCC plugin incompatibility
when the compiler is upgraded. [1]

GCC plugins are tied to a particular GCC version. So, they must be
rebuilt when the compiler is upgraded.

This seems to be a long-standing flaw since the initial support of
GCC plugins.

Extend commit 8b59cd81dc5e ("kbuild: ensure full rebuild when the
compiler is updated"), so that GCC plugins are covered by the
compiler upgrade detection.

[1]: https://lore.kernel.org/lkml/CAHk-=wieoN5ttOy7SnsGwZv+Fni3R6m-Ut=oxih6bbZ28G+4dw@mail.gmail.com/

Reported-by: Linus Torvalds 
Signed-off-by: Masahiro Yamada 
Reviewed-by: Kees Cook

gcc-plugins: latent_entropy: remove unneeded semicolon

2021-03-02T03:19:50+00:00

Fix the following coccicheck warning:

scripts/gcc-plugins/latent_entropy_plugin.c:539:2-3: Unneeded semicolon

Reported-by: Hulk Robot 
Signed-off-by: Jason Yan 
Signed-off-by: Kees Cook 
Link: https://lore.kernel.org/r/20200418070521.10931-1-yanaijie@huawei.com