Problems with debug info in m68k-coff objdump/objcopy

[Steve deRosier]

I am converting a project from an MRI tool chain to the GNU tool chain for
various m68k chips.  The main problem that I am having has to do with not
being able to display C/C++ source in the emulator window.  We are using an
HP emulator (HPI64749) which requires an ieee format file.  I have the
project running on the target hardware+emulator just fine, but still having
problems with the debugging info.

I thought perhaps that when I use objcopy to create my ieee file from my
m68k-coff format file (can I create a m68k-ieee cross tool chain?  I looked
and experimented, but I don't think this is a supported target; if I'm wrong
please let me know) I should use the --debugging switch and that might do a
conversion on the debug info and solve my problems.

Unfortunately, objcopy didn't like the debug info in the file.  I've tried
using both coff and stabs format debug info switches on my compiler, but it
doesn't make a difference (not surprising, since the file referenced in the
info is not directly part of my project).

objdump has the same problem reading the file, so I have included the output
from it below.

All in all I find this a little confusing, because I would expect that gcc
would create debugging info that binutils would understand.  So--my problem,
or is it a bug?  If my problem, any ideas on how to fix it?  If not, does
someone have a patch, or can direct me on how to fix the problem?

Thanks,
- Steve

(sorry about the cross-post, did it incase anyone at crossgcc had ideas)

-------
beam 27: mobjdump -g cs.coff.x

cs.coff.x:     file format coff-m68k

Bad stab: warning: _kill is not implemented and will always fail
Last stabs entries before error:
n_type n_desc n_value  string
LSYM   0      00000000
__sbuf:T(7,14)=s8_base:(7,15)=*(0,11),0,32;_size:(0,1),32,32;;
LSYM   74     00000000 _fpos_t:t(7,16)=(0,3)
LSYM   0      00000000
__sFILE:T(7,5)=s88_p:(7,15),0,32;_r:(0,1),32,32;_w:(0,1),64,32;_flags:(0,8),
96,16;_file:(0,8),112,16;_bf:(7,14),128,64;_lbfsize:(0,1),192,32;_cookie:(7,
17)=*(0,19),224,32;read:(7,18)=*(7,19)=f(0,1),256,32;write:(7,20)=*(7,21)=f(
0,1),288,32;_seek:(7,22)=*(7,23)=f(7,16),320,32;close:(7,24)=*(7,25)=f(0,1),
352,32;_ub:(7,14),384,64;_up:(7,15),448,32;_ur:(0,1),480,32;_ubuf:(7,26)=ar(
0,1);0;2;(0,11),512,24;_nbuf:(7,27)=ar(0,1);0;0;(0,11),536,8;_lb:(7,14),544,
64;_blksize:(0,1),608,32;_offset:(0,1),640,32;_data:(7,28)=*(7,29)=xs_reent:
,672,32;;
LSYM   0      00000000
_reent:T(7,29)=s746_errno:(0,1),0,32;_stdin:(7,4),32,32;_stdout:(7,4),64,32;
_stderr:(7,4),96,32;_inc:(0,1),128,32;_emergency:(7,30)=ar(0,1);0;24;(0,2),1
60,200;_current_category:(0,1),368,32;_current_locale:(7,31)=*(0,2),400,32;_
_sdidinit:(0,1),432,32;__cleanup:(7,32)=*(7,33)=f(0,19),464,32;_result:(7,7)
,496,32;_result_k:(0,1),528,32;_p5s:(7,7),560,32;_freelist:(7,34)=*(7,7),592
,32;_cvtlen:(0,1),624,32;_cvtbuf:(7,35)=*(0,2),656,32;_new:(7,36)=u240_reent
:(7,37)=s74_rand_next:(0,4),0,32;_strtok_last:(7,35),32,32;_asctime_buf:(7,3
8)=ar(0,1);0;25;(0,2),64,208;_localtime_buf:(8,3),272,288;_gamma_signgam:(0,
1),560,32;;,0,592;_unused:(7,39)=s240_nextf:(7,40)=ar(0,1);0;29;(7,15),0,960
;_nmalloc:(7,41)=ar(0,1);0;29;(0,4),960,960;;,0,1920;;,688,1920;_atexit:(7,1
0),2608,32;_atexit0:(7,9),2640,1088;_sig_func:(7,42)=*(7,43)=*(7,44)=f(0,19)
,3728,32;__sglue:(7,2),3760,96;__sf:(7,45)=ar(0,1);0;2;(7,5),3856,2112;;
EINCL  0      00000000
BINCL  0      00000000
../../../../../../source/gcc-2.95.2/libgloss/libnosys/warning.h
EINCL  0      00000000
FUN    17     0081870c kill:F(0,1)
PSYM   15     00000008 pid:p(0,1)
PSYM   16     0000000c sig:p(0,1)
SLINE  17     00000000
SLINE  18     00000004
SLINE  19     0000000c
SLINE  20     0000000e
FUN    0      00000012
WARNING 0      00000000 warning: _kill is not implemented and will always
fail

------



--
Steve deRosier
Embedded Software Engineer
Vari-Lite International, Inc.



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