Package: qemu-user-static Version: 1.7.0+dfsg-9 Severity: normal Dear Maintainer,
while trying to set up a foreign chroot for sparc, loosely based in the instructions found for armel[0], I encountered a hang while starting second stage. How to repeat: # mkdir /tmp/dest # debootstrap --variant=buildd --include=fakeroot,build-essential \ --arch=sparc --foreign sid /tmp/dest http://ftp.de.debian.org/debian # cp -p /usr/bin/qemu-sparc32plus-static /tmp/dest/usr/bin/ # chroot /tmp/dest ./debootstrap/debootstrap --second-stage qemu: Unsupported syscall: 210 ... then debootstrap hangs while eating 100% CPU. Running strace on that process shows mprotect(0x4002c000, 8192, PROT_READ|PROT_WRITE|PROT_EXEC) = 0 rt_sigreturn(0) = 0 mprotect(0x4002c000, 8192, PROT_READ|PROT_EXEC) = 0 wait4(-1, 0x7fff94e844b0, 0, NULL) = -1 ECHILD (No child processes) --- SIGSEGV (Segmentation fault) @ 0 (0) --- mprotect(0x4002c000, 8192, PROT_READ|PROT_WRITE|PROT_EXEC) = 0 rt_sigreturn(0) = 0 mprotect(0x4002c000, 8192, PROT_READ|PROT_EXEC) = 0 wait4(-1, 0x7fff94e844b0, 0, NULL) = -1 ECHILD (No child processes) in an endless loop. That can be reduced to the execution of the 'cat' when using dash, in other words: This one fails: chroot /tmp/dest/ /bin/sh -c 'cat /etc/debian_version' This one succeeds: chroot /tmp/dest/ /bin/bash -c 'cat /etc/debian_version' FWIW, changing the default shell to /bin/bash only delays the trouble, running from inside the sparc chroot: # umount /proc/ Segmentation fault Second stage of debootstrap does this at some later point. Last-minute amendments: - About binfmt-support below, installing it doesn't change a bit. - Same problem with /usr/bin/qemu-sparc32plus-static taken from qemu-user-static_2.0.0+dfsg-3 Christoph [0] http://www.hellion.org.uk/blog/posts/foreign-chroots-with-schroot-and-qemu/ -- System Information: Debian Release: jessie/sid APT prefers testing APT policy: (500, 'testing') Architecture: amd64 (x86_64) Kernel: Linux 3.10.36 (SMP w/4 CPU cores) Locale: LANG=C, LC_CTYPE=C (charmap=ANSI_X3.4-1968) Shell: /bin/sh linked to /bin/dash qemu-user-static depends on no packages. Versions of packages qemu-user-static recommends: pn binfmt-support <none> Versions of packages qemu-user-static suggests: pn sudo <none> -- no debconf information
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