.---------------------------------------------------------------------.
  |     -= Welcome to aegir - an interactive debugger for Fenris! =-    |
  |---------------------------------------------------------------------|
  |   Copyright (C) 2002 by Michal Zalewski <lcamtuf@bos.bindview.com>  |
  |    This is a free software and comes with absolutely no warranty.   |
  | Use "help" to get help, and /usr/bin/fenris-bug to report problems. |
  `---------------------------------------------------------------------'

  Welcome to Fenris debugger 0.06b build 2844 running at PID 13883.
  Copyright (C) 2001, 2002 by Michal Zalewski <lcamtuf@coredump.cx>

  Cur. time : Wed May 22 00:31:09 2002
  Executable: ./a.out
  Arguments : <NULL>

  [aegir] step
  >> Singlestep stop at 0x80483b0 [_start].
  080483b0 [_start]:      xorl   %ebp,%ebp

  [aegir] next
  At 0x80483b0, continuing to next output line...
  20394:00 L memset (8049660, 0, 100) = 8049660
  20394:00 + g/8049660 = local buf
  20394:00 + g/8049660 = local buf
  20394:00 \ new buffer candidate: 8049660:100 (buf)
  20394:00 \ buffer 8049660 modified.
  >> New line stop at 0x400a5b0c [memset+68].
  080484bb [main+23]:     addl   $0x10,%esp

  [aegir] info buf
  Name 'buf' has address 0x08049660.
  + 8049660 = 8049660:100 <off 0> (first seen in L main:memset)
    last input: L main:memset

  [aegir] fdinfo 0
  + fd 0: "/dev/tty6", origin unknown

  [aegir] wwatch 0x08049660 0x08049670
  Breakpoint #0 added.
  [aegir] list
  00: stop on write 0x8049660-0x8049670.

  [aegir] fprint 0x080485a4
  Matches for signature CC6E587C: printf, wprintf

  [aegir] call
  At 0x80484bf, continuing to next local call...
  08048492 [funkcjadwa+6]:        call   $0x804849c <funkcjasiedem>
  21364:02   local funkcjasiedem ()
  21364:02   + funkcjasiedem = 0x804849c
  >> Local call to 0x804849c reached at 0x8048492 [funkcjadwa+6].

  [aegir] back
  Local function calls history (oldest to most recent calls):
  From 80484bf [main+11]: fnct_1 [funkcjadwa] 804848c, stack bffffa64 -> ...
  From 8048492 [funkcjadwa+6]: fnct_2 [funkcjasiedem] 804849c, stack bfff...

The GUI version of Aegir, nc-aegir, works basically the same way, but provides 
an organized debugging screen with register, memory and code views, integrated 
Fenris output view, and automatic control over Fenris parameters.

And this is why Aegir is a bit better than other disassemblers / debuggers
that rely on libbfd:

  $ gdb ./startwu
  "./startwu": not in executable format: File format not recognized

  $ objdump -d ./startwu
  objdump: ./startwu: File format not recognized

  $ ./fenris -W /tmp/aegir-sock -X 5 ./startwu &
  $ aegir /tmp/aegir-sock
  ...
  [aegir] disas
  05371035:       pushl  0x5371008
  0537103b:       pushf
  0537103c:       pusha
  0537103d:       movl   0x5371000,%ecx
  05371043:       jmp    $0x5371082
  05371048:       popl   %esi
  05371049:       movl   %esi,%edi

:-)