[Bug 59726] New: Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

            Bug ID: 59726
           Summary: Syscall emulation on Linux using Syscall User Dispatch
                    broken with glibc 2.34
           Product: Wine
           Version: 11.8
          Hardware: x86-64
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: P2
         Component: ntdll
          Assignee: [e-mail]
          Reporter: [e-mail]
   Regression SHA1: cbb9906d75346c9ca9be8ac0b3ddb06d9d48824d
      Distribution: ---

Created attachment 80872
  --> http://bugs.winehq.org/attachment.cgi?id=80872
VisualStudioSetup.exe

After initializing the Visual Studio installer
(https://visualstudio.microsoft.com) under Wine 11.8, execution stops. I
managed to identify that the cause is this commit:

cbb9906d75346c9ca9be8ac0b3ddb06d9d48824d is the first bad commit
commit cbb9906d75346c9ca9be8ac0b3ddb06d9d48824d (HEAD)
Author: Elizabeth Figura [e-mail]
Date: Fri Mar 13 16:25:41 2026 -0500

ntdll: Implement syscall emulation on Linux using Syscall User Dispatch.

Wine-Bug: https://bugs.winehq.org/show_bug.cgi?id=48291

dlls/ntdll/tests/exception.c | 1 -
dlls/ntdll/unix/signal_x86_64.c | 71
++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++-----------
2 files changed, 60 insertions(+), 12 deletions(-)

As I understand it, the reason for this behavior is the merging of libpthread,
libdl, libutil, libanl into libc in version 2.34
(https://sourceware.org/pipermail/libc-alpha/2021-August/129718.html). I am
running with libc version 2.32.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #1 from [e-mail] <[e-mail]> ---
Created attachment 80873
  --> http://bugs.winehq.org/attachment.cgi?id=80873
Disable syscall user dispatch on glibc older than 2.34

This patch helped me

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

[e-mail] <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
           Keywords|                            |regression

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

Zeb Figura <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #2 from Zeb Figura <[e-mail]> ---
I can't seem to run the installer; I get 'Unable to download installation
files. Check your internet connection and try again.'

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #3 from [e-mail] <[e-mail]> ---
Created attachment 80881
  --> http://bugs.winehq.org/attachment.cgi?id=80881
Paint.NET

Maybe this app will help you. It also doesn't work for me.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #4 from Zeb Figura <[e-mail]> ---
Please don't attach executables here you don't have permission to redistribute.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #5 from Zeb Figura <[e-mail]> ---
How exactly did you get visual studio to run? Did you use external patches or
winetricks verbs?

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #6 from Alexandre Julliard <[e-mail]> ---
The content of attachment 80872 has been deleted for the following reason:

Copyright violation

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #7 from [e-mail] <[e-mail]> ---
(In reply to Zeb Figura from comment #5)
> How exactly did you get visual studio to run? Did you use external patches
> or winetricks verbs?

What helped me was adding an additional condition check in the libc_addr_cb
function (dlls/ntdll/unix/signal_x86_64.c):

if (strcmp(p, "libc.so.6") && strcmp(p, "libpthread.so.0"))
    return 0;

I also found that setting static LONG syscall_dispatch_enabled = false; was
helpful.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #8 from Zeb Figura <[e-mail]> ---
It won't run for me even after disabling syscall emulation. I get the error
mentioned in comment 2.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #9 from [e-mail] <[e-mail]> ---
(In reply to Zeb Figura from comment #8)
> It won't run for me even after disabling syscall emulation. I get the error
> mentioned in comment 2.

What if I try installing paint.net? This program also causes the same problem
for me.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #10 from [e-mail] <[e-mail]> ---
(In reply to [e-mail] from comment #9)
> (In reply to Zeb Figura from comment #8)
> > It won't run for me even after disabling syscall emulation. I get the error
> > mentioned in comment 2.
>
> What if I try installing paint.net?

*Have you tried installing paint.net?

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #11 from Alexandre Julliard <[e-mail]> ---
The content of attachment 80881 has been deleted for the following reason:

Copyright violation

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

Zeb Figura <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|UNCONFIRMED                 |NEEDINFO
           Keywords|                            |download
     Ever confirmed|0                           |1
                URL|                            |https://github.com/paintdot
                   |                            |net/release/releases/downlo
                   |                            |ad/v5.1.12/paint.net.5.1.12
                   |                            |.install.anycpu.web.zip

--- Comment #12 from Zeb Figura <[e-mail]> ---
(In reply to [e-mail] from comment #10)
> (In reply to [e-mail] from comment #9)
> > (In reply to Zeb Figura from comment #8)
> > > It won't run for me even after disabling syscall emulation. I get the error
> > > mentioned in comment 2.
> >
> > What if I try installing paint.net?
>
> *Have you tried installing paint.net?

paint.net won't install on plain Wine either; it seems to need something from
d2d. How are you running these applications?

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

Ganni87 <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
                 CC|                            |[e-mail]

--- Comment #13 from Ganni87 <[e-mail]> ---

I would like to add that this feature broke many games for me.

Games such as - Guild Wars 1, Expedition 33 and Legacy of Kain Defiance
Remastered to name a few. Didn't test other games but most likely affects them
too. Issue started since 11.8 (and 11.9). Reverting to 11.7 games work fine.

I tried the OP's patch with 11.9 release and the games started working fine
again.

My glibc is also older than 2.34.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

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--- Comment #14 from Ganni87 <[e-mail]> ---
By "broke many games" I meant they don't run at all or crash after the first
screen.

Sorry forgot to mention the actual issue.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc 2.34

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http://bugs.winehq.org/show_bug.cgi?id=59726

Zeb Figura <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEEDINFO                    |NEW

--- Comment #15 from Zeb Figura <[e-mail]> ---
(In reply to Ganni87 from comment #13)
> I would like to add that this feature broke many games for me.
>
> Games such as - Guild Wars 1, Expedition 33 and Legacy of Kain Defiance
> Remastered to name a few. Didn't test other games but most likely affects
> them too. Issue started since 11.8 (and 11.9). Reverting to 11.7 games work
> fine.

Thanks, this helped. I tried running Legacy of Kain, which actually still
worked even inside a Debian Bullseye container (with glibc 2.31), but I was
able to get Steam itself to consistently crash.

The diagnosis in comment 0 was correct; the signal trampoline was in
libpthread. I wanted to make sure of this since it seems a bit annoying to deal
with.

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc < 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

Zeb Figura <[e-mail]> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
            Summary|Syscall emulation on Linux  |Syscall emulation on Linux
                   |using Syscall User Dispatch |using Syscall User Dispatch
                   |broken with glibc 2.34      |broken with glibc < 2.34

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc < 2.34

[WineHQ Bugzilla]

http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #16 from Ganni87 <[e-mail]> ---
(In reply to Zeb Figura from comment #15)
> (In reply to Ganni87 from comment #13)
> > I would like to add that this feature broke many games for me.
> >
> > Games such as - Guild Wars 1, Expedition 33 and Legacy of Kain Defiance
> > Remastered to name a few. Didn't test other games but most likely affects
> > them too. Issue started since 11.8 (and 11.9). Reverting to 11.7 games work
> > fine.
>
> Thanks, this helped. I tried running Legacy of Kain, which actually still
> worked even inside a Debian Bullseye container (with glibc 2.31), but I was
> able to get Steam itself to consistently crash.
>
> The diagnosis in comment 0 was correct; the signal trampoline was in
> libpthread. I wanted to make sure of this since it seems a bit annoying to
> deal with.

Hi, just wondering if the fix provided by OP is going to be merged or if
another solution is being worked on for this?

I'm asking as the patch no longer works starting from Wine 11.11+

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[Bug 59726] Syscall emulation on Linux using Syscall User Dispatch broken with glibc < 2.34

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http://bugs.winehq.org/show_bug.cgi?id=59726

--- Comment #17 from Zeb Figura <[e-mail]> ---
(In reply to Ganni87 from comment #16)
> Hi, just wondering if the fix provided by OP is going to be merged or if
> another solution is being worked on for this?

I'm working on sending a different solution that will actually allow the
feature to work on older glibc. Sorry for the delay.

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