linux-stable.git/arch/arm/kernel/vmlinux.lds.h, branch v5.4.239 Linux kernel stable tree ARM: Do not use NOCROSSREFS directive with ld.lld 2022-03-11T10:22:38+00:00 Nathan Chancellor nathan@kernel.org 2022-03-09T22:07:27+00:00 40da947ba07629d4e1c7798aca24f9d8ce91d8bc commit 36168e387fa7d0f1fe0cd5cf76c8cea7aee714fa upstream. ld.lld does not support the NOCROSSREFS directive at the moment, which breaks the build after commit b9baf5c8c5c3 ("ARM: Spectre-BHB workaround"): ld.lld: error: ./arch/arm/kernel/vmlinux.lds:34: AT expected, but got NOCROSSREFS Support for this directive will eventually be implemented, at which point a version check can be added. To avoid breaking the build in the meantime, just define NOCROSSREFS to nothing when using ld.lld, with a link to the issue for tracking. Cc: stable@vger.kernel.org Fixes: b9baf5c8c5c3 ("ARM: Spectre-BHB workaround") Link: https://github.com/ClangBuiltLinux/linux/issues/1609 Signed-off-by: Nathan Chancellor <nathan@kernel.org> Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 36168e387fa7d0f1fe0cd5cf76c8cea7aee714fa upstream.

ld.lld does not support the NOCROSSREFS directive at the moment, which
breaks the build after commit b9baf5c8c5c3 ("ARM: Spectre-BHB
workaround"):

  ld.lld: error: ./arch/arm/kernel/vmlinux.lds:34: AT expected, but got NOCROSSREFS

Support for this directive will eventually be implemented, at which
point a version check can be added. To avoid breaking the build in the
meantime, just define NOCROSSREFS to nothing when using ld.lld, with a
link to the issue for tracking.

Cc: stable@vger.kernel.org
Fixes: b9baf5c8c5c3 ("ARM: Spectre-BHB workaround")
Link: https://github.com/ClangBuiltLinux/linux/issues/1609
Signed-off-by: Nathan Chancellor <nathan@kernel.org>
Signed-off-by: Linus Torvalds <torvalds@linux-foundation.org>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: Spectre-BHB workaround 2022-03-11T10:22:38+00:00 Russell King (Oracle) rmk+kernel@armlinux.org.uk 2022-02-10T16:05:45+00:00 920f7970cf0db39f7f5387dc0af8620627726957 commit b9baf5c8c5c356757f4f9d8180b5e9d234065bc3 upstream. Workaround the Spectre BHB issues for Cortex-A15, Cortex-A57, Cortex-A72, Cortex-A73 and Cortex-A75. We also include Brahma B15 as well to be safe, which is affected by Spectre V2 in the same ways as Cortex-A15. Reviewed-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> [changes due to lack of SYSTEM_FREEING_INITMEM - gregkh] Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit b9baf5c8c5c356757f4f9d8180b5e9d234065bc3 upstream.

Workaround the Spectre BHB issues for Cortex-A15, Cortex-A57,
Cortex-A72, Cortex-A73 and Cortex-A75. We also include Brahma B15 as
well to be safe, which is affected by Spectre V2 in the same ways as
Cortex-A15.

Reviewed-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
[changes due to lack of SYSTEM_FREEING_INITMEM - gregkh]
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
ARM: use LOADADDR() to get load address of sections 2022-03-11T10:22:38+00:00 Russell King (Oracle) rmk+kernel@armlinux.org.uk 2022-02-11T19:49:50+00:00 dcf33beb492a764469f7fcd55a3438153f3f1198 commit 8d9d651ff2270a632e9dc497b142db31e8911315 upstream. Use the linker's LOADADDR() macro to get the load address of the sections, and provide a macro to set the start and end symbols. Acked-by: Catalin Marinas <catalin.marinas@arm.com> Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org> 
commit 8d9d651ff2270a632e9dc497b142db31e8911315 upstream.

Use the linker's LOADADDR() macro to get the load address of the
sections, and provide a macro to set the start and end symbols.

Acked-by: Catalin Marinas <catalin.marinas@arm.com>
Signed-off-by: Russell King (Oracle) <rmk+kernel@armlinux.org.uk>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
vmlinux.lds.h: Fix incomplete .text.exit discards 2018-10-11T21:54:58+00:00 Peter Oberparleiter oberpar@linux.ibm.com 2018-09-13T10:59:59+00:00 8dcf86caa1e3daf4a6ccf38e97f4f752b411f829 Enabling CONFIG_GCOV_PROFILE_ALL=y causes linker errors on ARM: `.text.exit' referenced in section `.ARM.exidx.text.exit': defined in discarded section `.text.exit' `.text.exit' referenced in section `.fini_array.00100': defined in discarded section `.text.exit' And related errors on NDS32: `.text.exit' referenced in section `.dtors.65435': defined in discarded section `.text.exit' The gcov compiler flags cause certain compiler versions to generate additional destructor-related sections that are not yet handled by the linker script, resulting in references between discarded and non-discarded sections. Since destructors are not used in the Linux kernel, fix this by discarding these additional sections. Reported-by: Arnd Bergmann <arnd@arndb.de> Tested-by: Arnd Bergmann <arnd@arndb.de> Acked-by: Arnd Bergmann <arnd@arndb.de> Reported-by: Greentime Hu <green.hu@gmail.com> Tested-by: Masami Hiramatsu <mhiramat@kernel.org> Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com> Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au> 
Enabling CONFIG_GCOV_PROFILE_ALL=y causes linker errors on ARM:

  `.text.exit' referenced in section `.ARM.exidx.text.exit':
  defined in discarded section `.text.exit'

  `.text.exit' referenced in section `.fini_array.00100':
  defined in discarded section `.text.exit'

And related errors on NDS32:

  `.text.exit' referenced in section `.dtors.65435':
  defined in discarded section `.text.exit'

The gcov compiler flags cause certain compiler versions to generate
additional destructor-related sections that are not yet handled by the
linker script, resulting in references between discarded and
non-discarded sections.

Since destructors are not used in the Linux kernel, fix this by
discarding these additional sections.

Reported-by: Arnd Bergmann <arnd@arndb.de>
Tested-by: Arnd Bergmann <arnd@arndb.de>
Acked-by: Arnd Bergmann <arnd@arndb.de>
Reported-by: Greentime Hu <green.hu@gmail.com>
Tested-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Peter Oberparleiter <oberpar@linux.ibm.com>
Signed-off-by: Stephen Rothwell <sfr@canb.auug.org.au>
ARM: 8774/1: remove no-op macro VMLINUX_SYMBOL() 2018-05-19T10:53:46+00:00 Masahiro Yamada yamada.masahiro@socionext.com 2018-05-17T07:01:28+00:00 83d41fb9c0eb66b3a97968cbe836e8c4df6af8ec VMLINUX_SYMBOL() is no-op unless CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX is defined. It has ever been selected only by BLACKFIN and METAG. VMLINUX_SYMBOL() is unneeded for ARM-specific code. Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com> Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk> 
VMLINUX_SYMBOL() is no-op unless CONFIG_HAVE_UNDERSCORE_SYMBOL_PREFIX
is defined.  It has ever been selected only by BLACKFIN and METAG.
VMLINUX_SYMBOL() is unneeded for ARM-specific code.

Signed-off-by: Masahiro Yamada <yamada.masahiro@socionext.com>
Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
ARM: simplify and fix linker script for TCM 2018-03-10T01:20:43+00:00 Nicolas Pitre nicolas.pitre@linaro.org 2018-03-09T02:12:04+00:00 b54290e51accea4f696f5dacef8e609d0ccbe54a Let's put the TCM stuff in the __init section directly. No need for a separately freed memory area. Remove redundant linker sections, as well as comments that were more confusing than no comments at all. Finally make it XIP compatible by using LOAD_OFFSET in the section LMA specification. Signed-off-by: Nicolas Pitre <nico@linaro.org> Tested-by: Chris Brandt <Chris.Brandt@renesas.com> 
Let's put the TCM stuff in the __init section directly. No need for
a separately freed memory area.

Remove redundant linker sections, as well as comments that were more
confusing than no comments at all. Finally make it XIP compatible by
using LOAD_OFFSET in the section LMA specification.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>
ARM: linker script: factor out TCM bits 2018-03-10T01:20:22+00:00 Nicolas Pitre nicolas.pitre@linaro.org 2018-03-09T01:19:48+00:00 c3146c43db4974f4571bd9d42b172ca03a9137c6 This is a plain move with identical results, and therefore still broken in the XIP case. Signed-off-by: Nicolas Pitre <nico@linaro.org> Tested-by: Chris Brandt <Chris.Brandt@renesas.com> 
This is a plain move with identical results, and therefore
still broken in the XIP case.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>
ARM: linker script: factor out vectors and stubs 2018-03-10T01:20:04+00:00 Nicolas Pitre nicolas.pitre@linaro.org 2018-03-02T03:17:03+00:00 9147095896fb321ae10ec5a5f789079318137ac9 Signed-off-by: Nicolas Pitre <nico@linaro.org> Tested-by: Chris Brandt <Chris.Brandt@renesas.com> 
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>
ARM: linker script: factor out unwinding table sections 2018-03-10T01:19:55+00:00 Nicolas Pitre nicolas.pitre@linaro.org 2018-03-01T22:32:28+00:00 d9a46e6e714178f6ce7fe2c536c59542a2964f6f Signed-off-by: Nicolas Pitre <nico@linaro.org> Tested-by: Chris Brandt <Chris.Brandt@renesas.com> 
Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>
ARM: linker script: factor out stuff for the .text section 2018-03-10T01:19:45+00:00 Nicolas Pitre nicolas.pitre@linaro.org 2018-03-05T21:34:03+00:00 47b4c77dc3565993e4925fb1c0cf00790f3b1eee Move common entries to vmlinux.lds.h as ARM_TEXT. Signed-off-by: Nicolas Pitre <nico@linaro.org> Tested-by: Chris Brandt <Chris.Brandt@renesas.com> 
Move common entries to vmlinux.lds.h as ARM_TEXT.

Signed-off-by: Nicolas Pitre <nico@linaro.org>
Tested-by: Chris Brandt <Chris.Brandt@renesas.com>