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syscall: 0.588
runtime: 0.279
instruction: 0.133
qemu-user clone syscall fails
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/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 ./clone_test
The variable was 9
clone returned -1: 22 Invalid argument
The variable is now 9
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