From: Ard Biesheuvel <ardb@kernel.org>
To: linux+pull@armlinux.org.uk
Cc: linux-arm-kernel@lists.infradead.org, Ard Biesheuvel <ardb@kernel.org>
Subject: [GIT PULL v2] ARM ftrace fixes for Thumb2, Clang and the EABI unwinder
Date: Mon, 14 Feb 2022 15:37:35 +0100 [thread overview]
Message-ID: <20220214143735.112800-1-ardb@kernel.org> (raw)
The following changes since commit 2fa3948244939471bfc93fa2f7cf3a1aadf79822:
Merge tag 'arm-vmap-stacks-v6' of git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux into devel-stable (2022-01-31 15:26:45 +0000)
are available in the Git repository at:
git://git.kernel.org/pub/scm/linux/kernel/git/ardb/linux.git tags/arm-ftrace-for-rmk
for you to fetch changes up to d6800ca73a7d325627c045c16d7cfdc7465f4333:
Revert "ARM: 9144/1: forbid ftrace with clang and thumb2_kernel" (2022-02-10 09:55:05 +0100)
PRv2: use rmk's current devel-stable as the start commit
----------------------------------------------------------------
ARM: ftrace fixes and cleanups
Make all flavors of ftrace available on all builds, regardless of ISA
choice, unwinder choice or compiler:
- use ADD not POP where possible
- fix a couple of Thumb2 related issues
- enable HAVE_FUNCTION_GRAPH_FP_TEST for robustness
- enable the graph tracer with the EABI unwinder
- avoid clobbering frame pointer registers to make Clang happy
Link: https://lore.kernel.org/linux-arm-kernel/20220203082204.1176734-1-ardb@kernel.org/
----------------------------------------------------------------
Ard Biesheuvel (12):
ARM: ftrace: ensure that ADR takes the Thumb bit into account
ARM: ftrace: use ADD not POP to counter PUSH at entry
ARM: ftrace: use trampolines to keep .init.text in branching range
ARM: ftrace: avoid redundant loads or clobbering IP
ARM: ftrace: avoid unnecessary literal loads
ARM: ftrace: enable HAVE_FUNCTION_GRAPH_FP_TEST
ARM: unwind: track location of LR value in stack frame
ARM: ftrace: enable the graph tracer with the EABI unwinder
ARM: kprobes: treat R7 as the frame pointer register in Thumb2 builds
ARM: cacheflush: avoid clobbering the frame pointer
ARM: mach-bcm: disable ftrace in SMC invocation routines
Revert "ARM: 9144/1: forbid ftrace with clang and thumb2_kernel"
arch/arm/Kconfig | 4 +-
arch/arm/Kconfig.debug | 2 +-
arch/arm/include/asm/cacheflush.h | 12 +--
arch/arm/include/asm/ftrace.h | 20 +----
arch/arm/include/asm/stacktrace.h | 3 +
arch/arm/kernel/Makefile | 6 +-
arch/arm/kernel/entry-ftrace.S | 128 +++++++++++++++++--------------
arch/arm/kernel/ftrace.c | 62 +++++++++++++--
arch/arm/kernel/unwind.c | 7 +-
arch/arm/mach-bcm/Makefile | 1 +
arch/arm/mach-exynos/mcpm-exynos.c | 6 +-
arch/arm/mm/cache-v7.S | 40 +++++-----
arch/arm/probes/kprobes/actions-common.c | 8 +-
arch/arm/probes/kprobes/actions-thumb.c | 16 +++-
14 files changed, 182 insertions(+), 133 deletions(-)
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next reply other threads:[~2022-02-14 14:39 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-02-14 14:37 Ard Biesheuvel [this message]
2022-02-28 12:46 ` [GIT PULL v2] ARM ftrace fixes for Thumb2, Clang and the EABI unwinder Ard Biesheuvel
2022-02-28 14:07 ` Russell King (Oracle)
2022-02-28 14:11 ` Ard Biesheuvel
2022-02-28 14:16 ` Russell King (Oracle)
2022-02-28 14:23 ` Ard Biesheuvel
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