[Bug gas/2724] New: GAS segmentation fault when target=coff and enabled-target=elf

[ed dot reed at aesec dot com]

When binutils is configured with --target=i386-aesec-coff
--enabled-target=i386-elf (or i586-linux or variations thereon), and

you run "gas/as-new -v"
you get the version string, followed by a segmentation fault

Configuration command:
../binutils-2.16.1/configure --target=i386-coff --enable-targets=i586-linux

and build the system, then run the new gas with -v:

address@hidden:/d1/box/obj-binutils-current> gas/as-new -v
GNU assembler version 2.16.1 (i386-coff) using BFD version 2.16.1
Segmentation fault

Looking through gdb:

address@hidden:/d1/box/obj-binutils-current> gdb gas/as-new
GNU gdb 6.3
Copyright 2004 Free Software Foundation, Inc.
GDB is free software, covered by the GNU General Public License, and you are
welcome to change it and/or distribute copies of it under certain conditions.
Type "show copying" to see the conditions.
There is absolutely no warranty for GDB.  Type "show warranty" for details.
This GDB was configured as "i586-suse-linux"...Using host libthread_db library
"/lib/tls/libthread_db.so.1".

(gdb) run -v
Starting program: /d1/box/obj-binutils-2.16.1/gas/as-new -v
GNU assembler version 2.16.1 (i386-coff) using BFD version 2.16.1

Program received signal SIGSEGV, Segmentation fault.
coff_new_section_hook (abfd=0x80ed3e8, section=0x80d56a0) at coffcode.h:1602
1602      coffsymbol (section->symbol)->native = native;
(gdb)  print (section->symbol)
$1 = (struct bfd_symbol *) 0x80ce550
(gdb) print *(section->symbol)
$2 = {the_bfd = 0x0, name = 0x80b5370 "*ABS*", value = 0, flags = 256, section =
0x80d56a0, udata = {p = 0x0, i = 0}}
(gdb)   

By stepping through the debugger prior to the segfault, I can see the .text and
.data sections passing this line of code with no issues.  But the second time it
is called with *ABS* section, it horks.

I'm guessing that as is trying to setup section headers and symbol tables
getting ready for source code input, and trying to set up ELF-things, which is
causing some consternation in coffcode.h.

I haven't a clue as to where to tell as to not bother trying to set up ELF
section headers for the default COFF output target.

I've tried this on binutils versions 2.15, 2.16 and 2.16.1

It's annoying.  I'd like to have binutils assume COFF, but be able to handle
ELF, and this is the only glitch I've found, so far.

Thanks,
Ed

-- 
           Summary: GAS segmentation fault when target=coff and enabled-
                    target=elf
           Product: binutils
           Version: 2.16
            Status: NEW
          Severity: normal
          Priority: P2
         Component: gas
        AssignedTo: unassigned at sources dot redhat dot com
        ReportedBy: ed dot reed at aesec dot com
                CC: bug-binutils at gnu dot org,ed dot reed at aesec dot com
 GCC build triplet: i586-suse-linux
  GCC host triplet: i586-suse-linux
GCC target triplet: i386-coff


http://sourceware.org/bugzilla/show_bug.cgi?id=2724

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