[Bug ld/29843] binutils-2.40 ld test failures "ld-aarch64/tls-relax-gdesc-le-now", "BTI PLT with only GNU PROP"

[dilfridge at gentoo dot org]

https://sourceware.org/bugzilla/show_bug.cgi?id=29843

--- Comment #8 from Andreas K. Huettel <dilfridge at gentoo dot org> ---
> > We apply a small patchset but I dont immediately see how it could be
> > relevant.
> > https://gitweb.gentoo.org/proj/toolchain/binutils-patches.git/tree/9999
> > 
> > FAIL: ld-aarch64/tls-relax-gdesc-le-now
> > FAIL: BTI PLT with only GNU PROP
>  
> I agree that at first glance that patch set does not look like it would cause
> these problems.  But it would be nice to have it confirmed.  ie, if you
> build 
> a toolchain without any patches applied, do the failures still occur ?

Same result with the patchset disabled.

> I suspect that the issue might be cross-builds vs native.  I was running the
> tests on an x86_64 Fedora box.  Are you running the tests on native hardware
> ?

Yes, this is on native hardware. 

My main suspicion lies on our gcc hardening patchset, I'm setting up a chroot
with a less-hardened gcc right now.

jiji /var/db/repos/gentoo/sys-devel/binutils # uname -a
Linux jiji 5.15.64-gentoo-dist #1 SMP Wed Aug 31 17:57:10 -00 2022 aarch64
GNU/Linux
jiji /var/db/repos/gentoo/sys-devel/binutils # ld.so --version
ld.so (Gentoo 2.36-r5 p5) stable release version 2.36.
Copyright (C) 2022 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.
There is NO warranty; not even for MERCHANTABILITY or FITNESS FOR A
PARTICULAR PURPOSE.
jiji /var/db/repos/gentoo/sys-devel/binutils # ld --version
GNU ld (Gentoo 2.39 p5) 2.39.0
Copyright (C) 2022 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License version 3 or (at your option) a later version.
This program has absolutely no warranty.
jiji /var/db/repos/gentoo/sys-devel/binutils # gcc --version
gcc (Gentoo Hardened 11.3.1_p20221209 p3) 11.3.1 20221209
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

jiji /var/db/repos/gentoo/sys-devel/binutils # lscpu
Architecture:           aarch64
  CPU op-mode(s):       32-bit, 64-bit
  Byte Order:           Little Endian
CPU(s):                 80
  On-line CPU(s) list:  0-79
Vendor ID:              ARM
  BIOS Vendor ID:       Ampere(R)
  Model name:           Neoverse-N1
    BIOS Model name:    Ampere(R) Altra(R) Processor Q80-30 CPU @ 2.8GHz
    BIOS CPU family:    257
    Model:              1
    Thread(s) per core: 1
    Core(s) per socket: 80
    Socket(s):          1
    Stepping:           r3p1
    Frequency boost:    disabled
    CPU(s) scaling MHz: 54%
    CPU max MHz:        3000.0000
    CPU min MHz:        1000.0000
    BogoMIPS:           50.08
    Flags:              fp asimd evtstrm aes pmull sha1 sha2 crc32 atomics fphp
asimdhp cpuid asimdrdm lrcpc dcpop asimddp ssbs
Caches (sum of all):    
  L1d:                  5 MiB (80 instances)
  L1i:                  5 MiB (80 instances)
  L2:                   80 MiB (80 instances)
NUMA:                   
  NUMA node(s):         1
  NUMA node0 CPU(s):    0-79
Vulnerabilities:        
  Itlb multihit:        Not affected
  L1tf:                 Not affected
  Mds:                  Not affected
  Meltdown:             Not affected
  Mmio stale data:      Not affected
  Retbleed:             Not affected
  Spec store bypass:    Mitigation; Speculative Store Bypass disabled via prctl
  Spectre v1:           Mitigation; __user pointer sanitization
  Spectre v2:           Mitigation; CSV2, BHB
  Srbds:                Not affected
  Tsx async abort:      Not affected
jiji /var/db/repos/gentoo/sys-devel/binutils #

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