Arch Linux

captainju

Member

Registered: 2012-08-01

Posts: 38

vsyscall emulate ignored in kernel 4.15

Hello,
when using the last kernel 4.15, it seems that adding vsyscall=emulate in kernel command line does nothing...
I keep getting vsyscall none
It's working as expected with the lts kernel.

Am I the only one with this behaviour?

How can I get it working?

loqs

Member

Registered: 2014-03-06

Posts: 17,372

Re: vsyscall emulate ignored in kernel 4.15

https://bugs.archlinux.org/task/57440  https://git.archlinux.org/svntogit/pack … cd4e5#n546
Rebuild the kernel with a config that has CONFIG_X86_VSYSCALL_EMULATION=y

captainju

Member

Registered: 2012-08-01

Posts: 38

Re: vsyscall emulate ignored in kernel 4.15

Thanks
I'll stay on LTS

Archmen

Member

Registered: 2016-02-19

Posts: 2

Re: vsyscall emulate ignored in kernel 4.15

have the same trouble, cant use docker on latest kernel

severach

Member

Registered: 2015-05-23

Posts: 192

Re: vsyscall emulate ignored in kernel 4.15

Re-enable CONFIG_X86_VSYSCALL_EMULATION in the future build.

Doesn't seem to be going anywhere yet.

R00KIE

Forum Fellow

From: Between a computer and a chair

Registered: 2008-09-14

Posts: 4,734

Re: vsyscall emulate ignored in kernel 4.15

Re-enable CONFIG_X86_VSYSCALL_EMULATION in the future build.

Doesn't seem to be going anywhere yet.

Why isn't it going anywhere? A kernel with that change is already in [testing], you are free to download, install and use it.

---

R00KIE
Tm90aGluZyB0byBzZWUgaGVyZSwgbW92ZSBhbG9uZy4K

severach

Member

Registered: 2015-05-23

Posts: 192

Re: vsyscall emulate ignored in kernel 4.15

CONFIG_X86_VSYSCALL_EMULATION is there but it's no good for me. I need CONFIG_MODIFY_LDT_SYSCALL so I'll keep working on my shadow package.

The options look so much alike that me and everyone else is mixing them up. Bug #57336 is the proper bug reference.