lkml.org 
[lkml]   [2022]   [Nov]   [23]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
/
Date
From
SubjectRe: [PATCH v2] riscv: vdso: fix section overlapping under some conditions
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

\
 
 \ /
  Last update: 2022-11-23 16:33    [W:0.042 / U:0.548 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site