[Bug binutils/19984] New: objdump aborts on particular x86-64 instruction on 32-bit x86 host

[b7.10110111 at gmail dot com]

https://sourceware.org/bugzilla/show_bug.cgi?id=19984

            Bug ID: 19984
           Summary: objdump aborts on particular x86-64 instruction on
                    32-bit x86 host
           Product: binutils
           Version: 2.26
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: b7.10110111 at gmail dot com
  Target Milestone: ---

This bug reproduces on a 32-bit host, but doesn't on 64-bit. Here're bash
commands which reproduce it:

xxd -g1 -r <<< '0  A1 DB 2D 89 10 00 DB 2D 8D' > /tmp/test.bin
objdump -D --target=binary -m i386 -M intel-mnemonic,x86-64 /tmp/test.bin

Running objdump in GDB, I get the following backtrace:

#0  0xffffe430 in __kernel_vsyscall ()
#1  0xf7c545e2 in *__GI_raise (sig=6) at
../nptl/sysdeps/unix/sysv/linux/raise.c:64
#2  0xf7c5605c in *__GI_abort () at abort.c:93
#3  0xf7ec8696 in get64 () at ../../binutils-2.26/opcodes/i386-dis.c:15776
#4  0xf7ec96ad in OP_OFF64 (bytemode=4, sizeflag=3) at
../../binutils-2.26/opcodes/i386-dis.c:16252
#5  0xf7ec489d in print_insn (pc=0, info=0xffffd248) at
../../binutils-2.26/opcodes/i386-dis.c:13513
#6  0xf7ec29fb in print_insn_i386 (pc=0, info=0xffffd248) at
../../binutils-2.26/opcodes/i386-dis.c:12757
#7  0x0804ceb0 in disassemble_bytes (inf=0xffffd248, disassemble_fn=0xf7ec29d0
<print_insn_i386>, insns=1, data=0x80bcb48 "\241\333-\211\020", start_offset=0,
stop_offset=9, rel_offset=0, relppp=0xffffd17c, 
    relppend=0x0) at ../../binutils-2.26/binutils/objdump.c:1697
#8  0x0804dd2b in disassemble_section (abfd=0x80ba848, section=0x80bb960,
inf=0xffffd248) at ../../binutils-2.26/binutils/objdump.c:2137
#9  0xf7dda7f9 in bfd_map_over_sections (abfd=0x80ba848, operation=0x804d5ef
<disassemble_section>, user_storage=0xffffd248) at
../../binutils-2.26/bfd/section.c:1392
#10 0x0804e1aa in disassemble_data (abfd=0x80ba848) at
../../binutils-2.26/binutils/objdump.c:2273
#11 0x0805036b in dump_bfd (abfd=0x80ba848) at
../../binutils-2.26/binutils/objdump.c:3363
#12 0x080504df in display_object_bfd (abfd=0x80ba848) at
../../binutils-2.26/binutils/objdump.c:3420
#13 0x080506ee in display_any_bfd (file=0x80ba848, level=0) at
../../binutils-2.26/binutils/objdump.c:3509
#14 0x08050759 in display_file (filename=0xffffd6e2 "/tmp/test.bin",
target=0xffffd6ba "binary") at ../../binutils-2.26/binutils/objdump.c:3530
#15 0x08050fd7 in main (argc=8, argv=0xffffd4c4) at
../../binutils-2.26/binutils/objdump.c:3813

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