[Qemu-devel] [Bug 1821430] Re: qemu-user-arm (4.0.0-rc0) crashes

[asavah]

I should point that -cpu cortex-a53 is not available in qemu-arm,
I'm building arm 32 bit stuff.

qemu-arm -cpu help
Available CPUs:
  arm1026
  arm1136
  arm1136-r2
  arm1176
  arm11mpcore
  arm926
  arm946
  cortex-a15
  cortex-a7
  cortex-a8
  cortex-a9
  cortex-m0
  cortex-m3
  cortex-m33
  cortex-m4
  cortex-r5
  cortex-r5f
  max
  pxa250
  pxa255
  pxa260
  pxa261
  pxa262
  pxa270-a0
  pxa270-a1
  pxa270
  pxa270-b0
  pxa270-b1
  pxa270-c0
  pxa270-c5
  sa1100
  sa1110
  ti925t
  any

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https://bugs.launchpad.net/bugs/1821430

Title:
  qemu-user-arm (4.0.0-rc0) crashes

Status in QEMU:
  New

Bug description:
  I'm using qemu-user-arm for crosscompilation needs, usually via a wrapper.
  qemu-user-arm (4.0.0-rc0) crashes with SIGILL on at least 2 instructions:

  first case (sadly I don't have more data handy, can reproduce at a later time 
if needed):
  (gdb) x/i $pc
  => 0xfffce314:  vseleq.f64      d0, d17, d0

  second case (llvm-config):
  qemu cmdline:
  qemu-arm -strace -cpu max -r 5.0.0 -L /home/asavah/kross/build/rpi3/rootfs -E 
LD_LIBRARY_PATH=/home/asavah/kross/build/rpi3/rootfs/usr/bin:/home/asavah/kross/build/rpi3/rootfs/usr/lib
 /home/asavah/kross/build/rpi3/rootfs/usr/bin/llvm-config --shared-mode

  --- SIGILL {si_signo=SIGILL, si_code=2, si_addr=0xf9f89f80} ---
  qemu: uncaught target signal 4 (Illegal instruction) - core dumped

  output from gdb(arm) attached to qemu-user-arm
  Program received signal SIGILL, Illegal instruction.
  0xf9f77f80 in ?? ()
  (gdb) bt
  #0  0xf9f77f80 in ?? ()
  #1  0xfffd796c in ?? ()
  Backtrace stopped: previous frame identical to this frame (corrupt stack?)
  (gdb)  x/i $pc
  => 0xf9f77f80:  vrintm.f64      d18, d18

  
  The very same binaries when run with qemu-user-arm 3.1.0 (both from ubuntu 
19.04 package and self built)
  work flawlessly.

  This is clearly a regression.
  Please fix before releasing 4.0.0.

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