[Qemu-devel] qemu-x86_64 on i386 host: SIGSEGV

[Michael Tokarev]

$ ./x86_64-linux-user/qemu-x86_64 bash64
qemu: uncaught target signal 11 (Segmentation fault) - core dumped
Segmentation Fault

$ gdb x86_64-linux-user/qemu-x86_64
(gdb) ru bash64
Program received signal SIGSEGV, Segmentation fault.
disas_insn (address@hidden, pc_start=18446744073699066880)
    at target-i386/translate.c:4107
4107        b = ldub_code(s->pc);
(gdb) p *s
$1 = {override = -1, prefix = 1484501952, aflag = 1, dflag = 1484503884,
  pc = 18446744073699066880, is_jmp = 0, cs_base = 0, pe = 1, code32 = 1,
  lma = 1, code64 = 1, rex_x = 0, rex_b = 0, ss32 = 1, cc_op = 0, addseg = 0,
  f_st = 0, vm86 = 0, cpl = 3, iopl = 0, tf = 0, singlestep_enabled = 0,
  jmp_opt = 1, mem_index = 0, flags = 4243635, tb = 0xf50e9f88,
  popl_esp_hack = 0, rip_offset = 0, cpuid_features = 126614521,
  cpuid_ext_features = -2139086847, cpuid_ext2_features = 563194873,
  cpuid_ext3_features = 101}

This is with current git.  Previous versions (tried 1.1 and 1.4)
segfaults in the same place too.

Some binaries works - for example, gzip (it prints "qemu: Unsupported syscall:
202" on the way which is a different issue).

Thanks,

/mjt