Cannot run Debian in Termux

[oxr463]

curl -LO https://github.com/proot-me/proot-rs/releases/download/v0.1.0/proot-rs-v0.1.0-aarch64-linux-android.tar.gz
tar -xf proot-rs-v0.1.0-aarch64-linux-android.tar.gz
curl -LO https://us.images.linuxcontainers.org/images/debian/sid/arm64/default/20210821_05:28/rootfs.tar.xz
mkdir debian
cd debian
tar -xf ../rootfs.tar.xz
cd ..
./proot-rs -r debian /bin/sh
echo $?
159

[imlk0]

Just to summarize what is known so far. proot-rs does not currently work in termux (but can run proot-rs in the adb shell).

Two errors have been found so far.

1. Bad address
   The error is exactly the one you mentioned here:
   Add support for Android platform and other architectures (e.g. arm, aarch64) #35 (comment)

   I tried testing in Termux on my Motorola G7, Android 10, and here is what I got:

   ./proot-rs --rootfs=./alpine --bind /dev:/dev --bind /proc:/proc
   bash: ./proot-rs: Bad address
   echo $?
   126

   The characteristic is that echo $? results in 126

   The strange thing is that once I run again with RUST_LOG=trace (which will generate more log):

   RUST_LOG=trace ./proot-rs --rootfs=./alpine --bind /dev:/dev --bind /proc:/proc

   This error disappears and does not appear anymore, even after restarting termux. I no longer see any Bad address, and the exit code is no longer 126.

   So I think it's a bug of termux.

2. Exit with code 159

   This is the main error mentioned in current issue.

   By setting RUST_LOG=trace, we could get more logs:

   

   The logs show that the first tracee process was successfully loaded by our loader-shim, but was killed by a SIGSYS signal shortly after leaving from the loader-shim.

   By analyzing the generated core dump file, it was found that the tracee was calling system call setgid32().

   Since the problem did not occur when testing proot-rs in the adb shell, I think it may be related to seccomp.

   ➜  ~ adb shell
   enchilada:/ $ whoami
   shell
   enchilada:/ $ cat /proc/self/status | grep Seccomp
   Seccomp:        0
   enchilada:/ $ cat /proc/`pidof com.termux`/status | grep Seccomp                                                                                                              
   Seccomp:        2