[Bug 1825002] Re: "qemu: Unexpected FPU mode" since 0c1bbedc10e86ea9366b6af8c5520fafa3266b2f

[Carlo Marcelo Arenas Belón]

FWIW I am still seeing a similar failure with 5.1.0rc3 (using a "Hello
World" like program in Ubuntu 20.04 x86_64 built statically):

$ mipsisa32r6el-linux-gnu-gcc --static -o h h.c
$ ./qemu-mipsn32el ./h
qemu: Unexpected FPU mode

big endian also seems to be affected

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https://bugs.launchpad.net/bugs/1825002

Title:
  "qemu: Unexpected FPU mode" since
  0c1bbedc10e86ea9366b6af8c5520fafa3266b2f

Status in QEMU:
  Fix Released

Bug description:
  This happens every time I attempt to chroot into a gentoo-mips image
  unless I load the executable via ld.so

  /home (root)# chroot gentoo-mips32r2el /bin/sh
  qemu: Unexpected FPU mode
  /home (root)# chroot gentoo-mips32r2el /lib/ld-2.19.so /bin/sh
  sh-4.2# exit
  /home (root)# 

  I don't know the underlying cause, but keep in mind that we may lie
  and claim to have an FPU when our CPU doesn't because of kernel
  emulation that may not be present in the host kernel.  Don't know if
  that's related.

  I get this with various gentoo-mips stage3 tarballs, but not with
  OpenWRT.  (e.g.,
  https://gentoo.osuosl.org/experimental/mips/stages/mips32r2el/2014)


  # emerge --info app-emulation/qemu
  Portage 2.3.51 (python 3.6.5-final-0, 
default/linux/amd64/17.0/desktop/plasma, gcc-8.2.0, glibc-2.27-r6, 
4.14.96-gentoo x86_64)
  =================================================================
                           System Settings
  =================================================================
  System uname: 
Linux-4.14.96-gentoo-x86_64-AMD_Ryzen_7_2700X_Eight-Core_Processor-with-gentoo-2.6
  KiB Mem:    32890732 total,   3480024 free
  KiB Swap:   16777212 total,  10575592 free
  Timestamp of repository gentoo: Thu, 11 Apr 2019 06:00:01 +0000
  Head commit of repository gentoo: 66eaaa28926103e690db0699466a274a17ab1979
  sh bash 4.4_p23-r1
  ld GNU ld (Gentoo 2.30 p5) 2.30.0
  distcc 3.3.2 x86_64-pc-linux-gnu [disabled]
  ccache version 3.3.4 [disabled]
  app-shells/bash:          4.4_p23-r1::gentoo
  dev-java/java-config:     2.2.0-r4::gentoo
  dev-lang/perl:            5.26.2::gentoo
  dev-lang/python:          2.7.15::gentoo, 3.6.5::gentoo
  dev-util/ccache:          3.3.4-r1::gentoo
  dev-util/cmake:           3.9.6::gentoo
  dev-util/pkgconfig:       0.29.2::gentoo
  sys-apps/baselayout:      2.6-r1::gentoo
  sys-apps/openrc:          0.38.3-r1::gentoo
  sys-apps/sandbox:         2.13::gentoo
  sys-devel/autoconf:       2.13-r1::gentoo, 2.64-r1::gentoo, 2.69-r4::gentoo
  sys-devel/automake:       1.11.6-r3::gentoo, 1.13.4-r2::gentoo, 
1.15.1-r2::gentoo, 1.16.1-r1::gentoo
  sys-devel/binutils:       2.30-r4::gentoo
  sys-devel/gcc:            4.9.4::gentoo, 5.4.0-r6::gentoo, 6.4.0-r5::gentoo, 
7.3.0-r6::gentoo, 8.1.0-r3::gentoo, 8.2.0-r6::gentoo, 8.3.0::gentoo
  sys-devel/gcc-config:     2.0::gentoo
  sys-devel/libtool:        2.4.6-r3::gentoo
  sys-devel/make:           4.2.1-r4::gentoo
  sys-kernel/linux-headers: 4.14-r1::gentoo (virtual/os-headers)
  sys-libs/glibc:           2.27-r6::gentoo
  Repositories:

  gentoo
      location: /usr/portage
      sync-type: rsync
      sync-uri: rsync://rsync.gentoo.org/gentoo-portage
      priority: -1000
      sync-rsync-verify-jobs: 1
      sync-rsync-extra-opts: 
      sync-rsync-verify-metamanifest: yes
      sync-rsync-verify-max-age: 24

  love-local
      location: /usr/local/portage
      masters: gentoo
      priority: 0

  chaoslab
      location: /var/lib/layman/chaoslab
      masters: gentoo
      priority: 50

  java
      location: /var/lib/layman/java
      masters: gentoo
      priority: 50

  steam-overlay
      location: /var/lib/layman/steam-overlay
      masters: gentoo
      priority: 50

  zugaina
      location: /var/lib/layman/zugaina
      masters: gentoo
      priority: 50

  ACCEPT_KEYWORDS="amd64"
  ACCEPT_LICENSE="* -@EULA"
  CBUILD="x86_64-pc-linux-gnu"
  CFLAGS="-march=native -O2 -ggdb3 -pipe"
  CHOST="x86_64-pc-linux-gnu"
  CONFIG_PROTECT="/etc /usr/lib64/libreoffice/program/sofficerc 
/usr/share/config /usr/share/gnupg/qualified.txt"
  CONFIG_PROTECT_MASK="/etc/ca-certificates.conf /etc/dconf /etc/env.d 
/etc/fonts/fonts.conf /etc/gconf /etc/gentoo-release /etc/revdep-rebuild 
/etc/sandbox.d /etc/splash /etc/terminfo /etc/texmf/language.dat.d 
/etc/texmf/language.def.d /etc/texmf/updmap.d /etc/texmf/web2c"
  CXXFLAGS="-march=native -O2 -ggdb3 -pipe"
  DISTDIR="/mnt/large/distfiles"
  EMERGE_DEFAULT_OPTS="-j3 --load-average=17.5 --with-bdeps=y --autounmask=n"
  ENV_UNSET="DBUS_SESSION_BUS_ADDRESS DISPLAY GOBIN PERL5LIB PERL5OPT 
PERLPREFIX PERL_CORE PERL_MB_OPT PERL_MM_OPT XAUTHORITY XDG_CACHE_HOME 
XDG_CONFIG_HOME XDG_DATA_HOME XDG_RUNTIME_DIR"
  FCFLAGS="-O2 -pipe"
  FEATURES="assume-digests binpkg-logs buildpkg candy cgroup 
compress-build-logs compressdebug config-protect-if-modified distlocks 
ebuild-locks fixlafiles installsources ipc-sandbox merge-sync multilib-strict 
network-sandbox news parallel-fetch preserve-libs protect-owned sandbox sfperms 
split-elog split-log splitdebug strict strict-keepdir unknown-features-warn 
unmerge-logs unmerge-orphans userfetch userpriv usersandbox usersync xattr"
  FFLAGS="-O2 -pipe"
  GENTOO_MIRRORS="http://gentoo.mirrors.tds.net/gentoo 
http://gentoo.mirrors.easynews.com/linux/gentoo/ http://gentoo.osuosl.org/ 
http://mirrors.rit.edu/gentoo/ http://gentoo.cs.uni.edu/ 
http://gentoo.osuosl.org/ "
  LANG="en_US.utf8"
  LDFLAGS="-Wl,-O1 -Wl,--as-needed"
  LINGUAS="en en-US en_US"
  MAKEOPTS="-j15 --load-average=17"
  PKGDIR="/mnt/large/packages"
  PORTAGE_COMPRESS="pxz"
  PORTAGE_COMPRESS_FLAGS="-9e"
  PORTAGE_CONFIGROOT="/"
  PORTAGE_RSYNC_OPTS="--recursive --links --safe-links --perms --times 
--omit-dir-times --compress --force --whole-file --delete --stats 
--human-readable --timeout=180 --exclude=/distfiles --exclude=/local 
--exclude=/packages --exclude=/.git"
  PORTAGE_TMPDIR="/tmp"
  USE="X a52 aac aacs acl acpi activities aes aio alsa amd64 amr avx avx2 
bcache berkdb bluetooth bluray branding bzip2 cairo cdda cddb cdio cdr celt cli 
consolekit crypt cups cxx d3d9 dbus declarative designer device-mapper dirac 
directfb dot dri dts dvd dvdr emboss encode exif f16c fam ffmpeg fftw flac 
fluidsynth fma3 fontconfig fortran fuse gdbm geolocation gif git glamor go 
gphoto2 gpm gps graphite graphviz gsm gstreamer gtk hardened hddtemp highlight 
iconv icu ipv6 jpeg jpeg2k kde kerberos kipi kwallet lame latex lcms ldap 
libass libcaca libnotify libsamplerate libtirpc lm_sensors lto lvm lz4 lzma lzo 
mad matroska midi mjpeg mmx mmxext mng mono mp3 mp4 mpeg mtp multicall multilib 
multitarget musepack natspec ncurses netlink networkmanager nfs nls nptl 
nsplugin ogg openal openexr opengl openh264 openmp openssl opus osmesa pam 
pango pcap pch pclmul pcre pdf perl pgo phonon plasma playlist png policykit 
popcnt postgres postproc ppds pulseaudio python qml qt5 rar raw readline samba 
sasl savedconfig scanner schroedinger sdl seccomp sensors sid smp snappy speex 
spell spice sqlite sqlite3 squashfs sse sse2 sse3 sse4_1 sse4_2 sse4a ssh ssl 
ssse3 startup-notification static-libs subversion svg syslog systemtap taglib 
tcpd theora threads tiff timidity tools tremor truetype tty-helpers twolame 
udev udisks unicode upnp-av upower usb usbredir utils v4l vaapi valgrind vcdx 
vdpau vim-syntax virt-network virtio vlc vorbis vpx webdav webp widgets 
wxwidgets x264 x265 xattr xcb xcomposite xen xine xml xspice xv xvid xvmc 
zeroconf zlib" ABI_X86="64 32" ALSA_CARDS="ali5451 als4000 atiixp atiixp-modem 
bt87x ca0106 cmipci emu10k1x ens1370 ens1371 es1938 es1968 fm801 hda-intel 
intel8x0 intel8x0m maestro3 trident usb-audio via82xx via82xx-modem ymfpci" 
APACHE2_MODULES="authn_core authz_core socache_shmcb unixd actions alias 
auth_basic authn_alias authn_anon authn_dbm authn_default authn_file authz_dbm 
authz_default authz_groupfile authz_host authz_owner authz_user autoindex cache 
cgi cgid dav dav_fs dav_lock deflate dir disk_cache env expires ext_filter 
file_cache filter headers include info log_config logio mem_cache mime 
mime_magic negotiation rewrite setenvif speling status unique_id userdir 
usertrack vhost_alias" CALLIGRA_FEATURES="karbon sheets words" 
COLLECTD_PLUGINS="df interface irq load memory rrdtool swap syslog" 
CPU_FLAGS_X86="aes avx avx2 f16c fma3 mmx mmxext pclmul popcnt sse sse2 sse3 
sse4_1 sse4_2 sse4a ssse3" CURL_SSL="openssl" ELIBC="glibc" 
GPSD_PROTOCOLS="ashtech aivdm earthmate evermore fv18 garmin garmintxt gpsclock 
isync itrax mtk3301 nmea ntrip navcom oceanserver oldstyle oncore rtcm104v2 
rtcm104v3 sirf skytraq superstar2 timing tsip tripmate tnt ublox ubx" 
GRUB_PLATFORMS="efi-64 pc coreboot emu multiboot qemu xen" 
INPUT_DEVICES="keyboard mouse joystick evdev wacom vmmouse" KERNEL="linux" 
L10N="en en-US en_US" LCD_DEVICES="bayrad cfontz cfontz633 glk hd44780 lb216 
lcdm001 mtxorb ncurses text" LIBREOFFICE_EXTENSIONS="presenter-console 
presenter-minimizer" LLVM_TARGETS="AMDGPU ARM BPF NVPTX Mips X86" 
NETBEANS_MODULES="apisupport cnd groovy gsf harness ide identity j2ee java 
mobility nb php profiler soa visualweb webcommon websvccommon xml" 
OFFICE_IMPLEMENTATION="libreoffice" PHP_TARGETS="php5-6 php7-1" 
POSTGRES_TARGETS="postgres9_5 postgres10" PYTHON_SINGLE_TARGET="python3_6" 
PYTHON_TARGETS="python2_7 python3_6" QEMU_SOFTMMU_TARGETS="aarch64 arm armeb 
i386 hppa m68k microblaze microblazeel mips mips64 mips64el mipsel mipsn32 
mipsn32el ppc ppc64 ppc64abi32 ppc64le s390x sparc sparc32plus sparc64 x86_64" 
QEMU_USER_TARGETS="aarch64 arm armeb i386 hppa m68k microblaze microblazeel 
mips mips64 mips64el mipsel mipsn32 mipsn32el ppc ppc64 ppc64abi32 ppc64le 
s390x sparc sparc32plus sparc64 x86_64" RUBY_TARGETS="ruby24" USERLAND="GNU" 
VIDEO_CARDS="radeon radeonsi vesa qxl vmware amdgpu" XTABLES_ADDONS="quota2 psd 
pknock lscan length2 ipv4options ipset ipp2p iface geoip fuzzy condition tee 
tarpit sysrq steal rawnat logmark ipmark dhcpmac delude chaos account"
  Unset:  CC, CPPFLAGS, CTARGET, CXX, INSTALL_MASK, LC_ALL, PORTAGE_BINHOST, 
PORTAGE_BUNZIP2_COMMAND, PORTAGE_RSYNC_EXTRA_OPTS

  =================================================================
                          Package Settings
  =================================================================

  app-emulation/qemu-3.1.0-r4::gentoo was built with the following:
  USE="aio alsa bzip2 caps curl fdt filecaps gtk jpeg lzo ncurses nfs nls 
opengl pin-upstream-blobs png pulseaudio python sasl sdl seccomp snappy spice 
ssh static-user systemtap usb usbredir vde vhost-net virtfs vnc vte xattr xen 
-accessibility (-capstone) -debug (-glusterfs) -gnutls -infiniband -iscsi -numa 
-rbd (-selinux) -smartcard (-static) -tci -test -virgl -xfs" ABI_X86="(64)" 
PYTHON_TARGETS="python2_7 python3_6 -python3_5 (-python3_7)" 
QEMU_SOFTMMU_TARGETS="aarch64 arm hppa i386 m68k microblaze microblazeel mips 
mips64 mips64el mipsel ppc ppc64 s390x sparc sparc64 x86_64 -alpha -cris -lm32 
-moxie -nios2 -or1k -riscv32 -riscv64 -sh4 -sh4eb -tricore -unicore32 -xtensa 
-xtensaeb" QEMU_USER_TARGETS="aarch64 arm armeb hppa i386 m68k microblaze 
microblazeel mips mips64 mips64el mipsel mipsn32 mipsn32el ppc ppc64 ppc64abi32 
ppc64le s390x sparc sparc32plus sparc64 x86_64 -aarch64_be -alpha -cris -nios2 
-or1k -riscv32 -riscv64 -sh4 -sh4eb -tilegx -xtensa -xtensaeb"

  >>> Attempting to run pkg_info() for 'app-emulation/qemu-3.1.0-r4'
  Using:
    app-emulation/spice-protocol-0.12.14
    sys-firmware/edk2-ovmf-2017_p20180211
      USE=binary
    sys-firmware/ipxe-1.0.0_p20180211
    sys-firmware/seabios-1.11.0
      USE=binary
    sys-firmware/sgabios-0.1_pre8-r1

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