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Re: KEEP Re: [PATCH 2/2] xen: Add CONFIG_GC_SECTIONS
- To: Jan Beulich <jbeulich@xxxxxxxx>
- From: Jason Andryuk <jason.andryuk@xxxxxxx>
- Date: Fri, 9 Jan 2026 18:32:37 -0500
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- Cc: Victor Lira <victorm.lira@xxxxxxx>, Anthony PERARD <anthony.perard@xxxxxxxxxx>, Michal Orzel <michal.orzel@xxxxxxx>, Roger Pau Monné <roger.pau@xxxxxxxxxx>, Stefano Stabellini <sstabellini@xxxxxxxxxx>, Grygorii Strashko <grygorii_strashko@xxxxxxxx>, <xen-devel@xxxxxxxxxxxxxxxxxxxx>, Andrew Cooper <andrew.cooper3@xxxxxxxxxx>
- Delivery-date: Sat, 10 Jan 2026 00:33:26 +0000
- List-id: Xen developer discussion <xen-devel.lists.xenproject.org>
(trimmed the CC list down)
On 2025-12-12 08:22, Jan Beulich wrote:
On 12.12.2025 02:34, Jason Andryuk wrote:
The alternative is section groups? I'm trying that, and it kinda works
sometimes, but .attach_to_group fails when .init.text is involved.
Here's an example that I think would work, I could make it to
--gc-sectrions:
group section [ 3] `.group' [.text.vpmu_do_msr] contains 5 sections:
[Index] Name
[ 43] .text.vpmu_do_msr
[ 44] .rela.text.vpmu_do_msr
[ 45] .altinstructions..text.vpmu_do_msr
[ 46] .rela.altinstructions..text.vpmu_do_msr
[ 47] .altinstr_replacement..text.vpmu_do_msr
But I don't make it that far. Other files blow up with tons of:
{standard input}:9098: Warning: dwarf line number information for
.init.text ignored
and
{standard input}:50083: Error: leb128 operand is an undefined symbol:
.LVU4040
Line 9098 of apic.s is .loc below:
"""
.section .init.text
Earlier in the file, there is
.section .init.text,"ax",@progbits
but the later .section .init.text entries don't have the extra string.
tl;dr: If I add "ax",@progbits to all the .init.text entries, the file
assembles.
I opened a bug here: https://sourceware.org/bugzilla/show_bug.cgi?id=33779
Regards,
Jason
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