ezano@Practice:~/Hacking $ gdbGNU gdb 6.6-debian Copyright (C) 2006 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 "i486-linux-gnu". (gdb) p 0xbfff - 8 $1 = 49143 (gdb) p 0xfa22 - 0xbfff $2 = 14883 (gdb) q