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Re: [PATCH 1/6] Add SBAT section to the PE binary
- To: Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Tue, 2 Jun 2026 14:58:05 +0200
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- Cc: Gerald Elder-Vass <gerald.elder-vass@xxxxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Teddy Astie <teddy.astie@xxxxxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Julien Grall <julien@xxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Marek Marczykowski-Górecki <marmarek@xxxxxxxxxxxxxxxxxxxxxx>, Frediano Ziglio <frediano.ziglio@xxxxxxxxx>, xen-devel@xxxxxxxxxxxxxxxxxxxx, Frediano Ziglio <freddy77@xxxxxxxxx>
- Delivery-date: Tue, 02 Jun 2026 12:58:02 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 02.06.2026 14:54, Andrew Cooper wrote:
> On 02/06/2026 1:06 pm, Jan Beulich wrote:
>> On 29.05.2026 17:35, Frediano Ziglio wrote:
>>> @@ -275,6 +276,9 @@ $(obj)/efi.lds: AFLAGS-y += -DEFI
>>> $(obj)/xen.lds $(obj)/efi.lds: $(src)/xen.lds.S FORCE
>>> $(call if_changed_dep,cpp_lds_S)
>>>
>>> +$(obj)/sbat_data.o: $(src)/sbat.csv
>>> + $(OBJCOPY) -I binary -O elf64-x86-64 --rename-section
>>> .data=.sbat,readonly,data,contents --add-section .note.GNU-stack=/dev/null
>>> $(srcdir)/sbat.csv $@
>> That'll be an SHT_PROGBITS .note.GNU-stack, won't it? When it really wants to
>> be SHT_NOTE at least for bleeding edge GNU binutils (see relatively recent
>> changes there).
>
> That was my addition to prevent there being a warning about RWX stacks
> cascade all the way up the build.
>
> Maybe a better option is to have sbat.S with an .incbin sbat.csv ?
Yes, that'll avoid all the custom objcopy-ing.
Jan
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