FREEBSD8.0 版本上調誡程序產生coredump文件無法調試！

cgmeco

在FREEBSD8.0的版本上用gcc編譯一段代碼，其中有coredump文件產生，但用GDB調試的時候，BT命令輸入時，系統提示no stack.不知道是怎麼回事！

編譯的時候命令：gcc -g checkid.c -o checkid

gcc 版本：

1. Using built-in specs.
   
2. Target: i386-undermydesk-freebsd
   
3. Configured with: FreeBSD/i386 system compiler
   
4. Thread model: posix
   
5. gcc version 4.2.1 20070719  [FreeBSD]

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gdb版本：

1. GNU gdb (GDB) 7.1 [GDB v7.1 for FreeBSD]
   
2. Copyright (C) 2010 Free Software Foundation, Inc.
   
3. License GPLv3+: GNU GPL version 3 or later <http://gnu.org/licenses/gpl.html>
   
4. This is free software: you are free to change and redistribute it.
   
5. There is NO WARRANTY, to the extent permitted by law.  Type "show copying"
   
6. and "show warranty" for details.
   
7. This GDB was configured as "i386-portbld-freebsd8.0".
   
8. For bug reporting instructions, please see:
   
9. <http://www.gnu.org/software/gdb/bugs/>.
   

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在查看stack內容時提示什麼都沒有？

1. (gdb) file checkid
   
2. Reading symbols from /usr/home/penseur/workstation/stdc/checkid...done.
   
3. (gdb) bt
   
4. No stack.
   
5. (gdb)
   

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請高人指點一下！謝謝