lkml.org 
[lkml]   [2018]   [Oct]   [1]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
    Patch in this message
    /
    From
    SubjectRESEND [PATCH v5 07/12] arm: vdso: disable profiling
    Date
    Take an effort to recode the arm64 vdso code from assembler to C
    previously submitted by Andrew Pinski <apinski@cavium.com>, rework
    it for use in both arm and arm64, overlapping any optimizations
    for each architecture. But instead of landing it in arm64, land the
    result into lib/vdso and unify both implementations to simplify
    future maintenance.

    Make sure kasan and ubsan profiling, and kcov instrumentation,
    is turned off for VDSO code.

    Signed-off-by: Mark Salyzyn <salyzyn@android.com>
    Tested-by: Mark Salyzyn <salyzyn@android.com>
    Cc: James Morse <james.morse@arm.com>
    Cc: Russell King <linux@armlinux.org.uk>
    Cc: Catalin Marinas <catalin.marinas@arm.com>
    Cc: Will Deacon <will.deacon@arm.com>
    Cc: Andy Lutomirski <luto@amacapital.net>
    Cc: Dmitry Safonov <dsafonov@virtuozzo.com>
    Cc: John Stultz <john.stultz@linaro.org>
    Cc: Mark Rutland <mark.rutland@arm.com>
    Cc: Laura Abbott <labbott@redhat.com>
    Cc: Kees Cook <keescook@chromium.org>
    Cc: Ard Biesheuvel <ard.biesheuvel@linaro.org>
    Cc: Andy Gross <andy.gross@linaro.org>
    Cc: Kevin Brodsky <kevin.brodsky@arm.com>
    Cc: Andrew Pinski <apinski@cavium.com>
    Cc: Thomas Gleixner <tglx@linutronix.de>
    Cc: linux-kernel@vger.kernel.org
    Cc: linux-arm-kernel@lists.infradead.org
    Cc: Jeremy Linton <Jeremy.Linton@arm.com>
    Cc: android-kernel@android.com

    v2:
    - Added this to the split up of first CL, based on comments in second CL

    v4:
    - update commit message to reflect overall reasoning

    v5:
    - rebase
    ---
    arch/arm/vdso/Makefile | 5 ++++-
    1 file changed, 4 insertions(+), 1 deletion(-)

    diff --git a/arch/arm/vdso/Makefile b/arch/arm/vdso/Makefile
    index f4efff9d3afb..1125e3fb8006 100644
    --- a/arch/arm/vdso/Makefile
    +++ b/arch/arm/vdso/Makefile
    @@ -27,8 +27,11 @@ CFLAGS_REMOVE_vdso.o = -pg
    CFLAGS_REMOVE_vgettimeofday.o = -pg -Os
    CFLAGS_vgettimeofday.o = -O2

    -# Disable gcov profiling for VDSO code
    +# Disable gcov, kasan, ubsan and kcov profiling for VDSO code
    GCOV_PROFILE := n
    +KASAN_SANITIZE := n
    +UBSAN_SANITIZE := n
    +KCOV_INSTRUMENT := n

    # Prevents link failures: __sanitizer_cov_trace_pc() is not linked in.
    KCOV_INSTRUMENT := n
    --
    2.19.0.605.g01d371f741-goog
    \
     
     \ /
      Last update: 2018-10-01 20:02    [W:7.156 / U:0.016 seconds]
    ©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site