Messages in this thread | | | Subject | Re: [PATCH v3 16/16] objtool,x86: Rewrite retpoline thunk calls | From | Nathan Chancellor <> | Date | Tue, 8 Jun 2021 10:29:56 -0700 |
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On 6/8/2021 10:22 AM, Peter Zijlstra wrote: > On Tue, Jun 08, 2021 at 09:58:03AM -0700, Nathan Chancellor wrote: >> On 6/7/2021 1:54 PM, 'Nick Desaulniers' via Clang Built Linux wrote: >>> On Mon, Jun 7, 2021 at 2:46 AM Peter Zijlstra <peterz@infradead.org> wrote: >>>> >>> >>> Thanks, the below diff resolves the linker error reported in >>> https://github.com/ClangBuiltLinux/linux/issues/1388 >>> >>> Both readelf implementations seem happy with the results, too. >>> >>> Tested-by: Nick Desaulniers <ndesaulniers@google.com> >>> >>> Nathan, >>> Can you please test the below diff and see if that resolves your boot >>> issue reported in: >>> https://github.com/ClangBuiltLinux/linux/issues/1384 >> >> Unfortunately, it does not appear to resolve that issue. >> >> $ git log -2 --decorate=no --oneline >> eea6a9d6d277 Peter's fix >> 614124bea77e Linux 5.13-rc5 >> >> $ strings /mnt/c/Users/natec/Linux/kernel-investigation | grep microsoft >> 5.13.0-rc5-microsoft-standard-WSL2-00001-geea6a9d6d277 >> (nathan@archlinux-ax161) #3 SMP Tue Jun 8 09:46:19 MST 2021 >> >> My VM still never makes it to userspace. > > Since it's a VM, can you use the gdb-stub to ask it where it's stuck? >
Unfortunately, this is the VM provided by the Windows Subsystem for Linux so examining it is nigh-impossible :/ I am considering bisecting the transforms that objtool does to try and figure out the one that causes the machine to fail to boot or try to reproduce in a different hypervisor, unless you have any other ideas.
Cheers, Nathan
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