[Bug binutils/26356] New: FAIL: objcopy --reverse-bytes

[danglin at gcc dot gnu.org]

https://sourceware.org/bugzilla/show_bug.cgi?id=26356

            Bug ID: 26356
           Summary: FAIL: objcopy --reverse-bytes
           Product: binutils
           Version: 2.35
            Status: NEW
          Severity: normal
          Priority: P2
         Component: binutils
          Assignee: unassigned at sourceware dot org
          Reporter: danglin at gcc dot gnu.org
  Target Milestone: ---
              Host: hppa2.0w-hp-hpux11.11
            Target: hppa2.0w-hp-hpux11.11
             Build: hppa2.0w-hp-hpux11.11

/mnt/gnu/binutils/objdir/binutils/objcopy  -j \$DATA\$ --reverse-bytes=4
tmpdir/
bintest.o tmpdir/bintest.o-reversed
Executing on host: /mnt/gnu/binutils/objdir/binutils/objcopy  -j \\$DATA\\$
--re
verse-bytes=4 tmpdir/bintest.o tmpdir/bintest.o-reversed   (timeout = 300)
spawn failed

Program causes segmentation fault.

-bash-4.4$ ./objcopy -j \$DATA\$ --reverse-bytes objcopy.o xxx.o
./objcopy: number of bytes to reverse must be positive and even
-bash-4.4$ ./objcopy -j \$DATA\$ --reverse-bytes=4 objcopy.o xxx.o
Segmentation fault (core dumped)
-bash-4.4$ gdb -c core objcopy
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Reading symbols from objcopy...done.
[New process 6052895]

warning: Private mapping of shared library text was not specified
by the executable; setting a breakpoint in a shared library which
is not privately mapped will not work.  See the HP-UX 11i v3 chatr
manpage for methods to privately map shared library text.
Unable to write __dld_flags.
(gdb) bt
#0  som_prep_headers (abfd=0x40014108) at ../../src/bfd/som.c:2678
#1  0x00047fd8 in som_set_section_contents (abfd=0x40014108, section=0x0,
    location=0x40027150, offset=0, count=2320) at ../../src/bfd/som.c:5711
#2  0x00036c58 in bfd_set_section_contents (abfd=0x40014108,
    section=0x40023fd0, location=0x40027150, offset=0, count=2320)
    at ../../src/bfd/section.c:1520
#3  0x00010ca4 in copy_section (ibfd=0xffffffff, isection=0x40020e08,
    obfdarg=0x40014108) at ../../src/binutils/objcopy.c:4430
#4  0x00036a4c in bfd_map_over_sections (abfd=0x40013048,
    operation=@0x400093ca: 0x109c8 <copy_section>, user_storage=0x40014108)
    at ../../src/bfd/section.c:1379
#5  0x00012a24 in copy_object (ibfd=0x40013048, obfd=0x40014108,
    input_arch=0x4002ff00) at ../../src/binutils/objcopy.c:3266
#6  0x000141fc in copy_file (input_filename=0x7eff0026 "objcopy.o",
    output_filename=0x7eff0030 "xxx.o", input_target=0x40014108 "@\002/\240@",
    output_target=0x89384 <__PRETTY_FUNCTION__.10416+24> "som", input_arch=0x0)
    at ../../src/binutils/objcopy.c:3831
#7  0x00016d5c in main (argc=1818324583, argv=0x6f70742f)
    at ../../src/binutils/objcopy.c:5892
(gdb) disass $pc-16,$pc+16
Dump of assembler code from 0x464bc to 0x464dc:
   0x000464bc <som_prep_headers+148>:   cmpib,=,n 0,ret0,0x465a4
<som_prep_headers+380>
   0x000464c0 <som_prep_headers+152>:   ldw 4(ret0),ret0
   0x000464c4 <som_prep_headers+156>:   cmpb,= r3,ret0,0x465bc
<som_prep_headers+404>
   0x000464c8 <som_prep_headers+160>:   ldo 40(ret0),ret0
=> 0x000464cc <som_prep_headers+164>:   ldw 0(ret0),ret0
   0x000464d0 <som_prep_headers+168>:   cmpb,= r3,ret0,0x465bc
<som_prep_headers+404>
   0x000464d4 <som_prep_headers+172>:   copy r8,r25
   0x000464d8 <som_prep_headers+176>:   b,l 0x353d8 <bfd_zalloc>,rp
End of assembler dump.
(gdb) p/x $ret0
$1 = 0x40

static bfd_boolean
som_is_space (asection *section)
{
  /* If no copy data is available, then it's neither a space nor a
     subspace.  */
  if (som_section_data (section)->copy_data == NULL)
    return FALSE;

  /* If the containing space isn't the same as the given section,
     then this isn't a space.  */
  if (som_section_data (section)->copy_data->container != section
      && (som_section_data (section)->copy_data->container->output_section
          != section))
    return FALSE;

  /* OK.  Must be a space.  */
  return TRUE;
}

Looks like som_section_data (section)->copy_data->container is NULL.

This bug has been around for some time.

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