From: Jisheng Zhang <jszhang@kernel.org>
To: Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
kernel test robot <lkp@intel.com>
Subject: Re: [PATCH v2] riscv: vdso: fix section overlapping under some conditions
Date: Wed, 23 Nov 2022 23:20:59 +0800 [thread overview]
Message-ID: <Y346Ww9Dt2f1Kipl@xhacker> (raw)
In-Reply-To: <20221102170254.1925-1-jszhang@kernel.org>
On Thu, Nov 03, 2022 at 01:02:54AM +0800, Jisheng Zhang wrote:
> lkp reported a build error, I tried the config and can reproduce
> build error as below:
>
> VDSOLD arch/riscv/kernel/vdso/vdso.so.dbg
> ld.lld: error: section .note file range overlaps with .text
> >>> .note range is [0x7C8, 0x803]
> >>> .text range is [0x800, 0x1993]
>
> ld.lld: error: section .text file range overlaps with .dynamic
> >>> .text range is [0x800, 0x1993]
> >>> .dynamic range is [0x808, 0x937]
>
> ld.lld: error: section .note virtual address range overlaps with .text
> >>> .note range is [0x7C8, 0x803]
> >>> .text range is [0x800, 0x1993]
>
> Fix it by setting DISABLE_BRANCH_PROFILING which will disable branch
> tracing for vdso, thus avoid useless _ftrace_annotated_branch section
> and _ftrace_branch section. Although we can also fix it by removing
> the hardcoded .text begin address, but I think that's another story
> and should be put into another patch.
>
> Link: https://lore.kernel.org/lkml/202210122123.Cc4FPShJ-lkp@intel.com/#r
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Gentle ping? This fix is still missing in mainline.
> ---
>
> Since v1:
> - fix the issue by setting DISABLE_BRANCH_PROFILING
>
> arch/riscv/kernel/vdso/Makefile | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
> index f2e065671e4d..d6092ff678fd 100644
> --- a/arch/riscv/kernel/vdso/Makefile
> +++ b/arch/riscv/kernel/vdso/Makefile
> @@ -17,6 +17,7 @@ vdso-syms += flush_icache
> obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
>
> ccflags-y := -fno-stack-protector
> +ccflags-y += -DDISABLE_BRANCH_PROFILING
>
> ifneq ($(c-gettimeofday-y),)
> CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y)
> --
> 2.37.2
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv
_______________________________________________
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WARNING: multiple messages have this Message-ID (diff)
From: Jisheng Zhang <jszhang@kernel.org>
To: Paul Walmsley <paul.walmsley@sifive.com>,
Palmer Dabbelt <palmer@dabbelt.com>,
Albert Ou <aou@eecs.berkeley.edu>
Cc: linux-riscv@lists.infradead.org, linux-kernel@vger.kernel.org,
kernel test robot <lkp@intel.com>
Subject: Re: [PATCH v2] riscv: vdso: fix section overlapping under some conditions
Date: Wed, 23 Nov 2022 23:20:59 +0800 [thread overview]
Message-ID: <Y346Ww9Dt2f1Kipl@xhacker> (raw)
In-Reply-To: <20221102170254.1925-1-jszhang@kernel.org>
On Thu, Nov 03, 2022 at 01:02:54AM +0800, Jisheng Zhang wrote:
> lkp reported a build error, I tried the config and can reproduce
> build error as below:
>
> VDSOLD arch/riscv/kernel/vdso/vdso.so.dbg
> ld.lld: error: section .note file range overlaps with .text
> >>> .note range is [0x7C8, 0x803]
> >>> .text range is [0x800, 0x1993]
>
> ld.lld: error: section .text file range overlaps with .dynamic
> >>> .text range is [0x800, 0x1993]
> >>> .dynamic range is [0x808, 0x937]
>
> ld.lld: error: section .note virtual address range overlaps with .text
> >>> .note range is [0x7C8, 0x803]
> >>> .text range is [0x800, 0x1993]
>
> Fix it by setting DISABLE_BRANCH_PROFILING which will disable branch
> tracing for vdso, thus avoid useless _ftrace_annotated_branch section
> and _ftrace_branch section. Although we can also fix it by removing
> the hardcoded .text begin address, but I think that's another story
> and should be put into another patch.
>
> Link: https://lore.kernel.org/lkml/202210122123.Cc4FPShJ-lkp@intel.com/#r
> Reported-by: kernel test robot <lkp@intel.com>
> Signed-off-by: Jisheng Zhang <jszhang@kernel.org>
Gentle ping? This fix is still missing in mainline.
> ---
>
> Since v1:
> - fix the issue by setting DISABLE_BRANCH_PROFILING
>
> arch/riscv/kernel/vdso/Makefile | 1 +
> 1 file changed, 1 insertion(+)
>
> diff --git a/arch/riscv/kernel/vdso/Makefile b/arch/riscv/kernel/vdso/Makefile
> index f2e065671e4d..d6092ff678fd 100644
> --- a/arch/riscv/kernel/vdso/Makefile
> +++ b/arch/riscv/kernel/vdso/Makefile
> @@ -17,6 +17,7 @@ vdso-syms += flush_icache
> obj-vdso = $(patsubst %, %.o, $(vdso-syms)) note.o
>
> ccflags-y := -fno-stack-protector
> +ccflags-y += -DDISABLE_BRANCH_PROFILING
>
> ifneq ($(c-gettimeofday-y),)
> CFLAGS_vgettimeofday.o += -fPIC -include $(c-gettimeofday-y)
> --
> 2.37.2
>
>
> _______________________________________________
> linux-riscv mailing list
> linux-riscv@lists.infradead.org
> http://lists.infradead.org/mailman/listinfo/linux-riscv
next prev parent reply other threads:[~2022-11-23 15:31 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-11-02 17:02 [PATCH v2] riscv: vdso: fix section overlapping under some conditions Jisheng Zhang
2022-11-02 17:02 ` Jisheng Zhang
2022-11-23 15:20 ` Jisheng Zhang [this message]
2022-11-23 15:20 ` Jisheng Zhang
2022-11-30 5:50 ` patchwork-bot+linux-riscv
2022-11-30 5:50 ` patchwork-bot+linux-riscv
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