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Re: [PATCH] x86: also discard .fini_array in linker script
- To: Roger Pau Monné <roger.pau@xxxxxxxxxx>
- From: Jan Beulich <jbeulich@xxxxxxxx>
- Date: Fri, 4 Mar 2022 10:17:22 +0100
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- Cc: "xen-devel@xxxxxxxxxxxxxxxxxxxx" <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>, Wei Liu <wl@xxxxxxx>
- Delivery-date: Fri, 04 Mar 2022 09:17:41 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
On 04.03.2022 09:57, Roger Pau Monné wrote:
> On Fri, Mar 04, 2022 at 08:49:39AM +0100, Jan Beulich wrote:
>> This simply parallels .dtors. Both section types can reference
>> .text.exit, which requires them to be discarded together with that one.
>> Compilers, depending on their findings during the configure phase, may
>> elect to use either model. While .{init,fini}_array look to be
>> preferred, cross compilers apparently have this guessed, likely
>> resulting in a fallback to .{c,d}tors. Hence we need to support both
>> sets.
>
> Do we also need to consider discarding .fini? Or that's guaranteed to
> not be used by the compiler?
I'm not aware of it being used anymore; if it was used, we'd also need
to deal with .init (which - logically, but not technically - would
conflict with our own section of this same name in xen.efi).
Jan
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