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Re: [Xen-devel] [PATCH v3 2/3] xen/link: handle .init.rodata.cst* sections in the linker script


  • To: Roger Pau Monne <roger.pau@xxxxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>
  • From: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
  • Date: Thu, 27 Jun 2019 11:53:08 +0100
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  • Cc: Julien Grall <julien.grall@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>, Jan Beulich <jbeulich@xxxxxxxx>
  • Delivery-date: Thu, 27 Jun 2019 10:53:26 +0000
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On 27/06/2019 10:33, Roger Pau Monne wrote:
> Note that those sections when not prefixed with .init are already
> handled by the more general .rodata.* matching pattern in the .rodata
> output section.
>
> Signed-off-by: Roger Pau Monné <roger.pau@xxxxxxxxxx>

So, in hindsight, we'll never get .cst in .data, because of the
"constant" in the name, which rules out a lot of my first attemt.

As this does resolve the problem, Acked-by: Andrew Cooper
<andrew.cooper3@xxxxxxxxxx>

However ...

> ---
> Cc: Stefano Stabellini <sstabellini@xxxxxxxxxx>
> Cc: Julien Grall <julien.grall@xxxxxxx>
> Cc: Jan Beulich <jbeulich@xxxxxxxx>
> Cc: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
> Cc: Wei Liu <wl@xxxxxxx>
> ---
>  xen/arch/arm/xen.lds.S | 1 +
>  xen/arch/x86/xen.lds.S | 1 +
>  2 files changed, 2 insertions(+)
>
> diff --git a/xen/arch/arm/xen.lds.S b/xen/arch/arm/xen.lds.S
> index e664c4441a..b636d9f223 100644
> --- a/xen/arch/arm/xen.lds.S
> +++ b/xen/arch/arm/xen.lds.S
> @@ -156,6 +156,7 @@ SECTIONS
>         *(.init.rodata)
>         *(.init.rodata.rel)
>         *(.init.rodata.str*)
> +       *(.init.rodata.cst*)

... .init is just a grouping prefix, so I'd recommend that we treat
.init.rodata in exactly the same way as we treat .rodata, so I'd suggest
turning this into

*(.init.rodata)
*(.init.rodata.*)

to match the regular .rodata.

This can easily be adjusted on commit, to save yet-another-round.

~Andrew

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