gdb6.8 on Solaris 10: gcore not recognized

[revolver]

Having no luck getting gdb6.8 to recognize a Solaris gcore(1) generated core
file.
Have the same problem with gdb6.3, and figured I'd give gdb6.8 a try.
BTW, the pstack proc(1) tool and the Solaris modular debugger (mdb)
recognize
a gcore-genrated core dump.

gdb6.8 was built with GCC3.4.6.

...

[S10 address@hidden:] gdb_6.8 ./PmMain ./core.15412
GNU gdb 6.8
Copyright (C) 2008 Free Software Foundation, Inc.
License GPLv3+: GNU GPL version 3 or later
<http://gnu.org/licenses/gpl.html>
This is free software: you are free to change and redistribute it.
There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
and "show warranty" for details.
This GDB was configured as "sparc-sun-solaris2.10"...
(no debugging symbols found)
Reading symbols from /rest/release/LIB/libhoard_32.so...(no debugging
symbols found)...done.
Loaded symbols for /rest/release/LIB/libhoard_32.so
Reading symbols from /rest/release/LIB/libACE.so.5.6.0...(no debugging
symbols found)...done.
Loaded symbols for /rest/release/LIB/libACE.so.5.6.0
Reading symbols from /rest/release/LIB/libxerces-c.so.27...(no debugging
symbols found)...done.
Loaded symbols for /rest/release/LIB/libxerces-c.so.27
Reading symbols from /rest/release/LIB/libxerces-depdom.so.27...(no
debugging symbols found)...done.
Loaded symbols for /rest/release/LIB/libxerces-depdom.so.27
Reading symbols from /rest/release/LIB/libstlport.so.5.0...done.
Loaded symbols for /rest/release/LIB/libstlport.so.5.0
Reading symbols from /lib/librt.so.1...done.
Loaded symbols for /lib/librt.so.1
Reading symbols from /lib/libthread.so.1...
warning: Lowest section in /lib/libthread.so.1 is .dynamic at 00000074
done.
Loaded symbols for /lib/libthread.so.1
Reading symbols from /lib/libnsl.so.1...done.
Loaded symbols for /lib/libnsl.so.1
Reading symbols from /lib/libsocket.so.1...done.
Loaded symbols for /lib/libsocket.so.1
Reading symbols from /lib/libkstat.so.1...done.
Loaded symbols for /lib/libkstat.so.1
Reading symbols from /rest/release/LIB/libstdc++.so.6...done.
Loaded symbols for /rest/release/LIB/libstdc++.so.6
Reading symbols from /lib/libm.so.2...done.
Loaded symbols for /lib/libm.so.2
Reading symbols from /rest/release/LIB/libgcc_s.so.1...done.
Loaded symbols for /rest/release/LIB/libgcc_s.so.1
Reading symbols from /lib/libc.so.1...done.
Loaded symbols for /lib/libc.so.1
Reading symbols from /lib/libdl.so.1...
warning: Lowest section in /lib/libdl.so.1 is .hash at 000000b4
done.
Loaded symbols for /lib/libdl.so.1
Reading symbols from /usr/lib/libCrun.so.1...done.
Loaded symbols for /usr/lib/libCrun.so.1
Reading symbols from /lib/libsendfile.so.1...done.
Loaded symbols for /lib/libsendfile.so.1
Reading symbols from /lib/libgen.so.1...done.
Loaded symbols for /lib/libgen.so.1
Reading symbols from /lib/libpthread.so.1...
warning: Lowest section in /lib/libpthread.so.1 is .dynamic at 00000074
done.
Loaded symbols for /lib/libpthread.so.1
Reading symbols from /lib/libm.so.1...done.
Loaded symbols for /lib/libm.so.1
Reading symbols from /lib/libaio.so.1...done.
Loaded symbols for /lib/libaio.so.1
Reading symbols from /lib/libmd.so.1...done.
Loaded symbols for /lib/libmd.so.1
Reading symbols from /platform/sun4v/lib/libc_psr.so.1...done.
Loaded symbols for /platform/SUNW,SPARC-Enterprise-T1000/lib/libc_psr.so.1
Reading symbols from /platform/sun4v/lib/libmd_psr.so.1...done.
Loaded symbols for /platform/SUNW,SPARC-Enterprise-T1000/lib/libmd_psr.so.1
Reading symbols from /lib/libscf.so.1...done.
Loaded symbols for /lib/libscf.so.1
Reading symbols from /lib/libdoor.so.1...done.
Loaded symbols for /lib/libdoor.so.1
Reading symbols from /lib/libuutil.so.1...done.
Loaded symbols for /lib/libuutil.so.1
Reading symbols from /lib/libmp.so.2...done.
Loaded symbols for /lib/libmp.so.2
Reading symbols from /lib/ld.so.1...done.
Loaded symbols for /lib/ld.so.1
Core was generated by `PmMain'.
[New process 80948    ]
[New process 146484    ]
[New process 212020    ]
[New process 277556    ]
[New process 343092    ]
[New process 408628    ]
[New process 474164    ]
[New process 539700    ]
[New process 605236    ]
[New process 670772    ]
[New process 736308    ]
#0  0x00000000 in ?? ()
(gdb) bt
#0  0x00000000 in ?? ()
(gdb)

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