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[Bug 1926996] Re: qemu-user clone syscall fails
From: |
Alex Bennée |
Subject: |
[Bug 1926996] Re: qemu-user clone syscall fails |
Date: |
Mon, 03 May 2021 20:08:05 -0000 |
I suspect it's failing because the qemu-user emulation of clone is
basically enough for what libc uses and not for your own set of flags:
https://qemu-project.gitlab.io/qemu/src/S/2440.html#L6478
** Tags added: linux-user
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https://bugs.launchpad.net/bugs/1926996
Title:
qemu-user clone syscall fails
Status in QEMU:
New
Bug description:
qemu-user fails to emulate clone()
(https://linux.die.net/man/2/clone). The architecture doesn't seem to
matter, tho I've mostly been testing aarch64.
Attached is clone_test.c that demonstrates the problem. Running it natively
looks like this:
$ bin/x86_64/clone_test
The variable was 9
clone returned 4177: 0 Success
The variable is now 42
However, running it via qemu looks like:
$ qemu-aarch64-static --version
qemu-aarch64 version 5.2.0 (v5.2.0)
Copyright (c) 2003-2020 Fabrice Bellard and the QEMU Project developers
$ qemu-aarch64-static bin/aarch64/clone_test
The variable was 9
clone returned -1: 22 Invalid argument
The variable is now 9
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- [Bug 1926996] [NEW] qemu-user clone syscall fails, Aaron Simmons, 2021/05/03
- [Bug 1926996] Re: qemu-user clone syscall fails, Aaron Simmons, 2021/05/03
- [Bug 1926996] Re: qemu-user clone syscall fails, Aaron Simmons, 2021/05/03
- [Bug 1926996] Re: qemu-user clone syscall fails, Aaron Simmons, 2021/05/03
- [Bug 1926996] Re: qemu-user clone syscall fails, Aaron Simmons, 2021/05/03
- [Bug 1926996] Re: qemu-user clone syscall fails, Alex Bennée, 2021/05/03
- [Bug 1926996] Re: qemu-user clone syscall fails,
Alex Bennée <=
- [Bug 1926996] Re: qemu-user clone syscall fails, Thomas Huth, 2021/05/16