https://blog.csdn.net/SanOrintea/article/details/

大部分还是按照这个来的，就是关于数前面有多少个字符的时候，这个博客是用cyclic -l来数的，但是我在gdb中运行这个命令的时候显示有错误，

我觉得可能是因为那个博客是pwndbg，我是gdb-peda，所以，我就是列了这200个字符的规律，数了一下，当然按照下面x/200xw这种方法也可以数出来

在ida中

search->text  找到地址

也可以在左边直接找main

讯享网

ningan@ubuntu:~/anan/test$ ./ret2text
There is something amazing here, do you know anything?

Maybe I will tell you next time !ningan@ubuntu:~/anan/test$ 
ningan@ubuntu:~/anan/test$

ningan@ubuntu:~/anan/test$ cyclic 200
aaaabaaacaaadaaaeaaafaaagaaahaaaiaaajaaakaaalaaamaaanaaaoaaapaaaqaaaraaasaaataaauaaavaaawaaaxaaayaaazaabbaabcaabdaabeaabfaabgaabhaabiaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab
ningan@ubuntu:~/anan/test$ 
ningan@ubuntu:~/anan/test$ gdb -q ret2text
Traceback (most recent call last):
  File "/home/ningan/pwndbg/gdbinit.py", line 36, in <module>
    import pwndbg # isort:skip
  File "/home/ningan/pwndbg/pwndbg/__init__.py", line 19, in <module>
    import pwndbg.commands.aslr
  File "/home/ningan/pwndbg/pwndbg/commands/aslr.py", line 24, in <module>
    def aslr(state=None):
  File "/home/ningan/pwndbg/pwndbg/commands/__init__.py", line 298, in __call__
    return _ArgparsedCommand(self.parser, function)
  File "/home/ningan/pwndbg/pwndbg/commands/__init__.py", line 267, in __init__
    super(_ArgparsedCommand, self).__init__(function, command_name=command_name, *a, kw)
  File "/home/ningan/pwndbg/pwndbg/commands/__init__.py", line 61, in __init__
    raise Exception('Cannot override non-whitelisted built-in command "%s"' % command_name)
Exception: Cannot override non-whitelisted built-in command "aslr"
Reading symbols from ret2text...done.
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
gdb-peda$ run
Starting program: /home/ningan/anan/test/ret2text 
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
There is something amazing here, do you know anything?
aaaabaaacaaadaaaeaaafaaagaaahaaaiaaajaaakaaalaaamaaanaaaoaaapaaaqaaaraaasaaataaauaaavaaawaaaxaaayaaazaabbaabcaabdaabeaabfaabgaabhaabiaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab
Maybe I will tell you next time !
Program received signal SIGSEGV, Segmentation fault.

[----------------------------------registers-----------------------------------]
EAX: 0x0 
EBX: 0xf7fbc000 --> 0x1acda8 
ECX: 0x21 ('!')
EDX: 0xf7fbd898 --> 0x0 
ESI: 0x0 
EDI: 0x0 
EBP: 0x ('caab')
ESP: 0xffffd140 ("eaabfaabgaabhaabiaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
EIP: 0x ('daab')
EFLAGS: 0x10282 (carry parity adjust zero SIGN trap INTERRUPT direction overflow)
[-------------------------------------code-------------------------------------]
Invalid $PC address: 0x
[------------------------------------stack-------------------------------------]
0000| 0xffffd140 ("eaabfaabgaabhaabiaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
0004| 0xffffd144 ("faabgaabhaabiaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
0008| 0xffffd148 ("gaabhaabiaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
0012| 0xffffd14c ("haabiaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
0016| 0xffffd150 ("iaabjaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
0020| 0xffffd154 ("jaabkaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
0024| 0xffffd158 ("kaablaabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
0028| 0xffffd15c ("laabmaabnaaboaabpaabqaabraabsaabtaabuaabvaabwaabxaabyaab")
[------------------------------------------------------------------------------]
Legend: code, data, rodata, value
Stopped reason: SIGSEGV
0x in ?? ()
Python Exception <class 'AttributeError'> 'module' object has no attribute 'commands': 
gdb-peda$ x/200xw 0xffffd140
0xffffd140:    0x    0x    0x    0x
0xffffd150:    0x    0xa    0xb    0xc
0xffffd160:    0xd    0xe    0xf    0x
0xffffd170:    0x    0x    0x    0x
0xffffd180:    0x    0x    0x    0x
0xffffd190:    0x    0xf7ff0600    0xf7e28a09    0xf7ffd000
0xffffd1a0:    0x00000001    0x0    0x00000000    0x0
0xffffd1b0:    0x0    0x00000001    0xffffd1d4    0x080486d0
0xffffd1c0:    0x0    0xf7feb300    0xffffd1cc    0x0000001c
0xffffd1d0:    0x00000001    0xffffd392    0x00000000    0xffffd3b2
0xffffd1e0:    0xffffd3bd    0xffffd3cf    0xffffd401    0xffffd412
0xffffd1f0:    0xffffd428    0xffffd45d    0xffffd46e    0xffffd47e
0xffffd200:    0xffffd489    0xffffd49b    0xffffd4cf    0xffffd513
0xffffd210:    0xffffd542    0xffffd54e    0xffffda6f    0xffffdaa9
0xffffd220:    0xffffdadd    0xffffdb0d    0xffffdb40    0xffffdb4c
0xffffd230:    0xffffdb90    0xffffdba7    0xffffdc05    0xffffdc14
0xffffd240:    0xffffdc35    0xffffdc47    0xffffdc62    0xffffdc74
0xffffd250:    0xffffdc88    0xffffdc99    0xffffdcb0    0xffffdce6
0xffffd260:    0xffffdcf5    0xffffdd12    0xffffdd24    0xffffdd2d
0xffffd270:    0xffffdd3f    0xffffdd59    0xffffdd61    0xffffdd70
0xffffd280:    0xffffdd82    0xffffdd91    0xffffddbd    0xffffddcf
0xffffd290:    0xffffddde    0xffffddfe    0xffffde3a    0xffffde89
0xffffd2a0:    0xffffde9b    0xffffdebb    0xffffded0    0xffffdef2
0xffffd2b0:    0xffffdf01    0xffffdf0c    0xffffdf2b    0xffffdf3e
0xffffd2c0:    0xffffdf58    0xffffdf7a    0xffffdf9b    0xffffdfbf
0xffffd2d0:    0x00000000    0x00000020    0xf7fdacd0    0x00000021
0xffffd2e0:    0xf7fda000    0x00000010    0x078bfbff    0x00000006
0xffffd2f0:    0x00001000    0x00000011    0x00000064    0x00000003
0xffffd300:    0x0    0x00000004    0x00000020    0x00000005
0xffffd310:    0x00000009    0x00000007    0xf7fdc000    0x00000008
0xffffd320:    0x00000000    0x00000009    0x0    0x0000000b
0xffffd330:    0x000003e8    0x0000000c    0x000003e8    0x0000000d
0xffffd340:    0x000003e8    0x0000000e    0x000003e8    0x00000017
0xffffd350:    0x00000000    0x00000019    0xffffd37b    0x0000001f
0xffffd360:    0xffffdfd8    0x0000000f    0xffffd38b    0x00000000
0xffffd370:    0x00000000    0x00000000    0x    0x2235c85a
0xffffd380:    0x26079adc    0xd3edc5de    0x69c74ecd    0x00
0xffffd390:    0x682f0000    0x2f656d6f    0x676e696e    0x612f6e61
0xffffd3a0:    0x2f6e616e    0x    0xf    0x
0xffffd3b0:    0x    0x54565f47    0x373d524e    0x
0xffffd3c0:    0xf    0x4e4f4953    0x3d44495f    0x
0xffffd3d0:    0x475f4744    0x    0x445f5245    0x5f
0xffffd3e0:    0x3d    0xf    0x62696c2f    0x67696c2f
0xffffd3f0:    0x6d    0xd    0x696e2f61    0x6e61676e
0xffffd400:    0x4c    0x58554e49    0x494e495f    0x45593d54
0xffffd410:    0x4c    0x    0x4d495f52    0x444f4d5f
0xffffd420:    0x3d454c55    0x006d6978    0x5f    0x4e
0xffffd430:    0x4e495f54    0x2f3d4f46    0x2f6e7572    0x
0xffffd440:    0xf    0x656b2f30    0x6e    0x6a4d2d67
0xffffd450:    0x    0xf    0x313a303a    0x
gdb-peda$ x/200xw 0xffffd120
0xffffd120:    0x    0x    0x    0x
0xffffd130:    0xa    0x    0x    0x
0xffffd140:    0x    0x    0x    0x
0xffffd150:    0x    0xa    0xb    0xc
0xffffd160:    0xd    0xe    0xf    0x
0xffffd170:    0x    0x    0x    0x
0xffffd180:    0x    0x    0x    0x
0xffffd190:    0x    0xf7ff0600    0xf7e28a09    0xf7ffd000
0xffffd1a0:    0x00000001    0x0    0x00000000    0x0
0xffffd1b0:    0x0    0x00000001    0xffffd1d4    0x080486d0
0xffffd1c0:    0x0    0xf7feb300    0xffffd1cc    0x0000001c
0xffffd1d0:    0x00000001    0xffffd392    0x00000000    0xffffd3b2
0xffffd1e0:    0xffffd3bd    0xffffd3cf    0xffffd401    0xffffd412
0xffffd1f0:    0xffffd428    0xffffd45d    0xffffd46e    0xffffd47e
0xffffd200:    0xffffd489    0xffffd49b    0xffffd4cf    0xffffd513
0xffffd210:    0xffffd542    0xffffd54e    0xffffda6f    0xffffdaa9
0xffffd220:    0xffffdadd    0xffffdb0d    0xffffdb40    0xffffdb4c
0xffffd230:    0xffffdb90    0xffffdba7    0xffffdc05    0xffffdc14
0xffffd240:    0xffffdc35    0xffffdc47    0xffffdc62    0xffffdc74
0xffffd250:    0xffffdc88    0xffffdc99    0xffffdcb0    0xffffdce6
0xffffd260:    0xffffdcf5    0xffffdd12    0xffffdd24    0xffffdd2d
0xffffd270:    0xffffdd3f    0xffffdd59    0xffffdd61    0xffffdd70
0xffffd280:    0xffffdd82    0xffffdd91    0xffffddbd    0xffffddcf
0xffffd290:    0xffffddde    0xffffddfe    0xffffde3a    0xffffde89
0xffffd2a0:    0xffffde9b    0xffffdebb    0xffffded0    0xffffdef2
0xffffd2b0:    0xffffdf01    0xffffdf0c    0xffffdf2b    0xffffdf3e
0xffffd2c0:    0xffffdf58    0xffffdf7a    0xffffdf9b    0xffffdfbf
0xffffd2d0:    0x00000000    0x00000020    0xf7fdacd0    0x00000021
0xffffd2e0:    0xf7fda000    0x00000010    0x078bfbff    0x00000006
0xffffd2f0:    0x00001000    0x00000011    0x00000064    0x00000003
0xffffd300:    0x0    0x00000004    0x00000020    0x00000005
0xffffd310:    0x00000009    0x00000007    0xf7fdc000    0x00000008
0xffffd320:    0x00000000    0x00000009    0x0    0x0000000b
0xffffd330:    0x000003e8    0x0000000c    0x000003e8    0x0000000d
0xffffd340:    0x000003e8    0x0000000e    0x000003e8    0x00000017
0xffffd350:    0x00000000    0x00000019    0xffffd37b    0x0000001f
0xffffd360:    0xffffdfd8    0x0000000f    0xffffd38b    0x00000000
0xffffd370:    0x00000000    0x00000000    0x    0x2235c85a
0xffffd380:    0x26079adc    0xd3edc5de    0x69c74ecd    0x00
0xffffd390:    0x682f0000    0x2f656d6f    0x676e696e    0x612f6e61
0xffffd3a0:    0x2f6e616e    0x    0xf    0x
0xffffd3b0:    0x    0x54565f47    0x373d524e    0x
0xffffd3c0:    0xf    0x4e4f4953    0x3d44495f    0x
0xffffd3d0:    0x475f4744    0x    0x445f5245    0x5f
0xffffd3e0:    0x3d    0xf    0x62696c2f    0x67696c2f
0xffffd3f0:    0x6d    0xd    0x696e2f61    0x6e61676e
0xffffd400:    0x4c    0x58554e49    0x494e495f    0x45593d54
0xffffd410:    0x4c    0x    0x4d495f52    0x444f4d5f
0xffffd420:    0x3d454c55    0x006d6978    0x5f    0x4e
0xffffd430:    0x4e495f54    0x2f3d4f46    0x2f6e7572    0x
gdb-peda$ p *0xffffd13c
$1 = 0x
gdb-peda$ x/200xw 0xffffd100
0xffffd100:    0xe    0xf    0x    0x
0xffffd110:    0x    0x    0x    0x
0xffffd120:    0x    0x    0x    0x
0xffffd130:    0xa    0x    0x    0x
0xffffd140:    0x    0x    0x    0x
0xffffd150:    0x    0xa    0xb    0xc
0xffffd160:    0xd    0xe    0xf    0x
0xffffd170:    0x    0x    0x    0x
0xffffd180:    0x    0x    0x    0x
0xffffd190:    0x    0xf7ff0600    0xf7e28a09    0xf7ffd000
0xffffd1a0:    0x00000001    0x0    0x00000000    0x0
0xffffd1b0:    0x0    0x00000001    0xffffd1d4    0x080486d0
0xffffd1c0:    0x0    0xf7feb300    0xffffd1cc    0x0000001c
0xffffd1d0:    0x00000001    0xffffd392    0x00000000    0xffffd3b2
0xffffd1e0:    0xffffd3bd    0xffffd3cf    0xffffd401    0xffffd412
0xffffd1f0:    0xffffd428    0xffffd45d    0xffffd46e    0xffffd47e
0xffffd200:    0xffffd489    0xffffd49b    0xffffd4cf    0xffffd513
0xffffd210:    0xffffd542    0xffffd54e    0xffffda6f    0xffffdaa9
0xffffd220:    0xffffdadd    0xffffdb0d    0xffffdb40    0xffffdb4c
0xffffd230:    0xffffdb90    0xffffdba7    0xffffdc05    0xffffdc14
0xffffd240:    0xffffdc35    0xffffdc47    0xffffdc62    0xffffdc74
0xffffd250:    0xffffdc88    0xffffdc99    0xffffdcb0    0xffffdce6
0xffffd260:    0xffffdcf5    0xffffdd12    0xffffdd24    0xffffdd2d
0xffffd270:    0xffffdd3f    0xffffdd59    0xffffdd61    0xffffdd70
0xffffd280:    0xffffdd82    0xffffdd91    0xffffddbd    0xffffddcf
0xffffd290:    0xffffddde    0xffffddfe    0xffffde3a    0xffffde89
0xffffd2a0:    0xffffde9b    0xffffdebb    0xffffded0    0xffffdef2
0xffffd2b0:    0xffffdf01    0xffffdf0c    0xffffdf2b    0xffffdf3e
0xffffd2c0:    0xffffdf58    0xffffdf7a    0xffffdf9b    0xffffdfbf
0xffffd2d0:    0x00000000    0x00000020    0xf7fdacd0    0x00000021
0xffffd2e0:    0xf7fda000    0x00000010    0x078bfbff    0x00000006
0xffffd2f0:    0x00001000    0x00000011    0x00000064    0x00000003
0xffffd300:    0x0    0x00000004    0x00000020    0x00000005
0xffffd310:    0x00000009    0x00000007    0xf7fdc000    0x00000008
0xffffd320:    0x00000000    0x00000009    0x0    0x0000000b
0xffffd330:    0x000003e8    0x0000000c    0x000003e8    0x0000000d
0xffffd340:    0x000003e8    0x0000000e    0x000003e8    0x00000017
0xffffd350:    0x00000000    0x00000019    0xffffd37b    0x0000001f
0xffffd360:    0xffffdfd8    0x0000000f    0xffffd38b    0x00000000
0xffffd370:    0x00000000    0x00000000    0x    0x2235c85a
0xffffd380:    0x26079adc    0xd3edc5de    0x69c74ecd    0x00
0xffffd390:    0x682f0000    0x2f656d6f    0x676e696e    0x612f6e61
0xffffd3a0:    0x2f6e616e    0x    0xf    0x
0xffffd3b0:    0x    0x54565f47    0x373d524e    0x
0xffffd3c0:    0xf    0x4e4f4953    0x3d44495f    0x
0xffffd3d0:    0x475f4744    0x    0x445f5245    0x5f
0xffffd3e0:    0x3d    0xf    0x62696c2f    0x67696c2f
0xffffd3f0:    0x6d    0xd    0x696e2f61    0x6e61676e
0xffffd400:    0x4c    0x58554e49    0x494e495f    0x45593d54
0xffffd410:    0x4c    0x    0x4d495f52    0x444f4d5f
gdb-peda$ x/200xw 0xffffd0f0
0xffffd0f0:    0xa    0xb    0xc    0xd
0xffffd100:    0xe    0xf    0x    0x
0xffffd110:    0x    0x    0x    0x
0xffffd120:    0x    0x    0x    0x
0xffffd130:    0xa    0x    0x    0x
0xffffd140:    0x    0x    0x    0x
0xffffd150:    0x    0xa    0xb    0xc
0xffffd160:    0xd    0xe    0xf    0x
0xffffd170:    0x    0x    0x    0x
0xffffd180:    0x    0x    0x    0x
0xffffd190:    0x    0xf7ff0600    0xf7e28a09    0xf7ffd000
0xffffd1a0:    0x00000001    0x0    0x00000000    0x0
0xffffd1b0:    0x0    0x00000001    0xffffd1d4    0x080486d0
0xffffd1c0:    0x0    0xf7feb300    0xffffd1cc    0x0000001c
0xffffd1d0:    0x00000001    0xffffd392    0x00000000    0xffffd3b2
0xffffd1e0:    0xffffd3bd    0xffffd3cf    0xffffd401    0xffffd412
0xffffd1f0:    0xffffd428    0xffffd45d    0xffffd46e    0xffffd47e
0xffffd200:    0xffffd489    0xffffd49b    0xffffd4cf    0xffffd513
0xffffd210:    0xffffd542    0xffffd54e    0xffffda6f    0xffffdaa9
0xffffd220:    0xffffdadd    0xffffdb0d    0xffffdb40    0xffffdb4c
0xffffd230:    0xffffdb90    0xffffdba7    0xffffdc05    0xffffdc14
0xffffd240:    0xffffdc35    0xffffdc47    0xffffdc62    0xffffdc74
0xffffd250:    0xffffdc88    0xffffdc99    0xffffdcb0    0xffffdce6
0xffffd260:    0xffffdcf5    0xffffdd12    0xffffdd24    0xffffdd2d
0xffffd270:    0xffffdd3f    0xffffdd59    0xffffdd61    0xffffdd70
0xffffd280:    0xffffdd82    0xffffdd91    0xffffddbd    0xffffddcf
0xffffd290:    0xffffddde    0xffffddfe    0xffffde3a    0xffffde89
0xffffd2a0:    0xffffde9b    0xffffdebb    0xffffded0    0xffffdef2
0xffffd2b0:    0xffffdf01    0xffffdf0c    0xffffdf2b    0xffffdf3e
0xffffd2c0:    0xffffdf58    0xffffdf7a    0xffffdf9b    0xffffdfbf
0xffffd2d0:    0x00000000    0x00000020    0xf7fdacd0    0x00000021
0xffffd2e0:    0xf7fda000    0x00000010    0x078bfbff    0x00000006
0xffffd2f0:    0x00001000    0x00000011    0x00000064    0x00000003
0xffffd300:    0x0    0x00000004    0x00000020    0x00000005
0xffffd310:    0x00000009    0x00000007    0xf7fdc000    0x00000008
0xffffd320:    0x00000000    0x00000009    0x0    0x0000000b
0xffffd330:    0x000003e8    0x0000000c    0x000003e8    0x0000000d
0xffffd340:    0x000003e8    0x0000000e    0x000003e8    0x00000017
0xffffd350:    0x00000000    0x00000019    0xffffd37b    0x0000001f
0xffffd360:    0xffffdfd8    0x0000000f    0xffffd38b    0x00000000
0xffffd370:    0x00000000    0x00000000    0x    0x2235c85a
0xffffd380:    0x26079adc    0xd3edc5de    0x69c74ecd    0x00
0xffffd390:    0x682f0000    0x2f656d6f    0x676e696e    0x612f6e61
0xffffd3a0:    0x2f6e616e    0x    0xf    0x
0xffffd3b0:    0x    0x54565f47    0x373d524e    0x
0xffffd3c0:    0xf    0x4e4f4953    0x3d44495f    0x
0xffffd3d0:    0x475f4744    0x    0x445f5245    0x5f
0xffffd3e0:    0x3d    0xf    0x62696c2f    0x67696c2f
0xffffd3f0:    0x6d    0xd    0x696e2f61    0x6e61676e
0xffffd400:    0x4c    0x58554e49    0x494e495f    0x45593d54
gdb-peda$ x/200xw 0xffffd0d0
0xffffd0d0:    0x    0x    0x    0x
0xffffd0e0:    0x    0x    0x    0x
0xffffd0f0:    0xa    0xb    0xc    0xd
0xffffd100:    0xe    0xf    0x    0x
0xffffd110:    0x    0x    0x    0x
0xffffd120:    0x    0x    0x    0x
0xffffd130:    0xa    0x    0x    0x
0xffffd140:    0x    0x    0x    0x
0xffffd150:    0x    0xa    0xb    0xc
0xffffd160:    0xd    0xe    0xf    0x
0xffffd170:    0x    0x    0x    0x
0xffffd180:    0x    0x    0x    0x
0xffffd190:    0x    0xf7ff0600    0xf7e28a09    0xf7ffd000
0xffffd1a0:    0x00000001    0x0    0x00000000    0x0
0xffffd1b0:    0x0    0x00000001    0xffffd1d4    0x080486d0
0xffffd1c0:    0x0    0xf7feb300    0xffffd1cc    0x0000001c
0xffffd1d0:    0x00000001    0xffffd392    0x00000000    0xffffd3b2
0xffffd1e0:    0xffffd3bd    0xffffd3cf    0xffffd401    0xffffd412
0xffffd1f0:    0xffffd428    0xffffd45d    0xffffd46e    0xffffd47e
0xffffd200:    0xffffd489    0xffffd49b    0xffffd4cf    0xffffd513
0xffffd210:    0xffffd542    0xffffd54e    0xffffda6f    0xffffdaa9
0xffffd220:    0xffffdadd    0xffffdb0d    0xffffdb40    0xffffdb4c
0xffffd230:    0xffffdb90    0xffffdba7    0xffffdc05    0xffffdc14
0xffffd240:    0xffffdc35    0xffffdc47    0xffffdc62    0xffffdc74
0xffffd250:    0xffffdc88    0xffffdc99    0xffffdcb0    0xffffdce6
0xffffd260:    0xffffdcf5    0xffffdd12    0xffffdd24    0xffffdd2d
0xffffd270:    0xffffdd3f    0xffffdd59    0xffffdd61    0xffffdd70
0xffffd280:    0xffffdd82    0xffffdd91    0xffffddbd    0xffffddcf
0xffffd290:    0xffffddde    0xffffddfe    0xffffde3a    0xffffde89
0xffffd2a0:    0xffffde9b    0xffffdebb    0xffffded0    0xffffdef2
0xffffd2b0:    0xffffdf01    0xffffdf0c    0xffffdf2b    0xffffdf3e
0xffffd2c0:    0xffffdf58    0xffffdf7a    0xffffdf9b    0xffffdfbf
0xffffd2d0:    0x00000000    0x00000020    0xf7fdacd0    0x00000021
0xffffd2e0:    0xf7fda000    0x00000010    0x078bfbff    0x00000006
0xffffd2f0:    0x00001000    0x00000011    0x00000064    0x00000003
0xffffd300:    0x0    0x00000004    0x00000020    0x00000005
0xffffd310:    0x00000009    0x00000007    0xf7fdc000    0x00000008
0xffffd320:    0x00000000    0x00000009    0x0    0x0000000b
0xffffd330:    0x000003e8    0x0000000c    0x000003e8    0x0000000d
0xffffd340:    0x000003e8    0x0000000e    0x000003e8    0x00000017
0xffffd350:    0x00000000    0x00000019    0xffffd37b    0x0000001f
0xffffd360:    0xffffdfd8    0x0000000f    0xffffd38b    0x00000000
0xffffd370:    0x00000000    0x00000000    0x    0x2235c85a
0xffffd380:    0x26079adc    0xd3edc5de    0x69c74ecd    0x00
0xffffd390:    0x682f0000    0x2f656d6f    0x676e696e    0x612f6e61
0xffffd3a0:    0x2f6e616e    0x    0xf    0x
0xffffd3b0:    0x    0x54565f47    0x373d524e    0x
0xffffd3c0:    0xf    0x4e4f4953    0x3d44495f    0x
0xffffd3d0:    0x475f4744    0x    0x445f5245    0x5f
0xffffd3e0:    0x3d    0xf    0x62696c2f    0x67696c2f
gdb-peda$ x/200xw 0xffffd0c0
0xffffd0c0:    0xffffd174    0xffffd0e8    0xffffd0e0    0x
0xffffd0d0:    0x    0x    0x    0x
0xffffd0e0:    0x    0x    0x    0x
0xffffd0f0:    0xa    0xb    0xc    0xd
0xffffd100:    0xe    0xf    0x    0x
0xffffd110:    0x    0x    0x    0x
0xffffd120:    0x    0x    0x    0x
0xffffd130:    0xa    0x    0x    0x
0xffffd140:    0x    0x    0x    0x
0xffffd150:    0x    0xa    0xb    0xc
0xffffd160:    0xd    0xe    0xf    0x
0xffffd170:    0x    0x    0x    0x
0xffffd180:    0x    0x    0x    0x
0xffffd190:    0x    0xf7ff0600    0xf7e28a09    0xf7ffd000
0xffffd1a0:    0x00000001    0x0    0x00000000    0x0
0xffffd1b0:    0x0    0x00000001    0xffffd1d4    0x080486d0
0xffffd1c0:    0x0    0xf7feb300    0xffffd1cc    0x0000001c
0xffffd1d0:    0x00000001    0xffffd392    0x00000000    0xffffd3b2
0xffffd1e0:    0xffffd3bd    0xffffd3cf    0xffffd401    0xffffd412
0xffffd1f0:    0xffffd428    0xffffd45d    0xffffd46e    0xffffd47e
0xffffd200:    0xffffd489    0xffffd49b    0xffffd4cf    0xffffd513
0xffffd210:    0xffffd542    0xffffd54e    0xffffda6f    0xffffdaa9
0xffffd220:    0xffffdadd    0xffffdb0d    0xffffdb40    0xffffdb4c
0xffffd230:    0xffffdb90    0xffffdba7    0xffffdc05    0xffffdc14
0xffffd240:    0xffffdc35    0xffffdc47    0xffffdc62    0xffffdc74
0xffffd250:    0xffffdc88    0xffffdc99    0xffffdcb0    0xffffdce6
0xffffd260:    0xffffdcf5    0xffffdd12    0xffffdd24    0xffffdd2d
0xffffd270:    0xffffdd3f    0xffffdd59    0xffffdd61    0xffffdd70
0xffffd280:    0xffffdd82    0xffffdd91    0xffffddbd    0xffffddcf
0xffffd290:    0xffffddde    0xffffddfe    0xffffde3a    0xffffde89
0xffffd2a0:    0xffffde9b    0xffffdebb    0xffffded0    0xffffdef2
0xffffd2b0:    0xffffdf01    0xffffdf0c    0xffffdf2b    0xffffdf3e
0xffffd2c0:    0xffffdf58    0xffffdf7a    0xffffdf9b    0xffffdfbf
0xffffd2d0:    0x00000000    0x00000020    0xf7fdacd0    0x00000021
0xffffd2e0:    0xf7fda000    0x00000010    0x078bfbff    0x00000006
0xffffd2f0:    0x00001000    0x00000011    0x00000064    0x00000003
0xffffd300:    0x0    0x00000004    0x00000020    0x00000005
0xffffd310:    0x00000009    0x00000007    0xf7fdc000    0x00000008
0xffffd320:    0x00000000    0x00000009    0x0    0x0000000b
0xffffd330:    0x000003e8    0x0000000c    0x000003e8    0x0000000d
0xffffd340:    0x000003e8    0x0000000e    0x000003e8    0x00000017
0xffffd350:    0x00000000    0x00000019    0xffffd37b    0x0000001f
0xffffd360:    0xffffdfd8    0x0000000f    0xffffd38b    0x00000000
0xffffd370:    0x00000000    0x00000000    0x    0x2235c85a
0xffffd380:    0x26079adc    0xd3edc5de    0x69c74ecd    0x00
0xffffd390:    0x682f0000    0x2f656d6f    0x676e696e    0x612f6e61
0xffffd3a0:    0x2f6e616e    0x    0xf    0x
0xffffd3b0:    0x    0x54565f47    0x373d524e    0x
0xffffd3c0:    0xf    0x4e4f4953    0x3d44495f    0x
0xffffd3d0:    0x475f4744    0x    0x445f5245    0x5f
gdb-peda$ 
0xffffd3e0:    0x3d    0xf    0x62696c2f    0x67696c2f
0xffffd3f0:    0x6d    0xd    0x696e2f61    0x6e61676e
0xffffd400:    0x4c    0x58554e49    0x494e495f    0x45593d54
0xffffd410:    0x4c    0x    0x4d495f52    0x444f4d5f
0xffffd420:    0x3d454c55    0x006d6978    0x5f    0x4e
0xffffd430:    0x4e495f54    0x2f3d4f46    0x2f6e7572    0x
0xffffd440:    0xf    0x656b2f30    0x6e    0x6a4d2d67
0xffffd450:    0x    0xf    0x313a303a    0x
0xffffd460:    0xf    0x4e4f4953    0xd    0x
0xffffd470:    0x3d4c4c45    0x6e69622f    0xf    0x
0xffffd480:    0x783d4d52    0x6d    0x4e    0x49574f44
0xffffd490:    0x30363d44    0x    0x    0x454d4f4e
0xffffd4a0:    0x59454b5f    0x474e4952    0x4e4f435f    0x4c4f5254
0xffffd4b0:    0x75722f3d    0x73752f6e    0x312f7265    0x2f
0xffffd4c0:    0xb    0x2d676e69    0x73476a4d    0x
0xffffd4d0:    0x    0x535f5452    0x    0x753d4e4f
0xffffd4e0:    0x3a78696e    0x    0x    0x6f632f3d
0xffffd4f0:    0x62752f6d    0x75746e75    0xf    0x
0xffffd500:    0xd    0x6e6f6973    0xf    0x31322f30
0xffffd510:    0x    0x4d5f4b54    0x4c55444f    0x6f3d5345
0xffffd520:    0x6c    0x732d7961    0x6c6f7263    0xc
0xffffd530:    0x696e753a    0x672d7974    0x6d2d6b74    0x6c75646f
0xffffd540:    0x    0x6e3d5245    0x61676e69    0x534c006e
0xffffd550:    0x4c4f435f    0x3d53524f    0x303d7372    0x3d69643a
0xffffd560:    0x333b3130    0x6e6c3a34    0x3b31303d    0x6d3a3633
0xffffd570:    0x30303d68    0x3d69703a    0x333b3034    0x6f733a33
0xffffd580:    0x3b31303d    0x643a3533    0x31303d6f    0x3a35333b
0xffffd590:    0x343d6462    0x33333b30    0x3a31303b    0x343d6463
0xffffd5a0:    0x33333b30    0x3a31303b    0x343d726f    0x31333b30
0xffffd5b0:    0x3a31303b    0x333d7573    0x31343b37    0x3d67733a
0xffffd5c0:    0x343b3033    0x61633a33    0x3b30333d    0x743a3134
0xffffd5d0:    0x30333d77    0x3a32343b    0x333d776f    0x32343b34
0xffffd5e0:    0x3d74733a    0x343b3733    0x78653a34    0x3b31303d
0xffffd5f0:    0x2a3a3233    0xe    0x3b31303d    0x2a3a3133
0xffffd600:    0x7a67742e    0x3b31303d    0x2a3a3133    0x6a72612e
0xffffd610:    0x3b31303d    0x2a3a3133    0x7a61742e    0x3b31303d
0xffffd620:    0x2a3a3133    0x687a6c2e    0x3b31303d    0x2a3a3133
0xffffd630:    0x6d7a6c2e    0x31303d61    0x3a31333b    0x6c742e2a
0xffffd640:    0x31303d7a    0x3a31333b    0x78742e2a    0x31303d7a
0xffffd650:    0x3a31333b    0x697a2e2a    0x31303d70    0x3a31333b
0xffffd660:    0x3d7a2e2a    0x333b3130    0x2e2a3a31    0x31303d5a
0xffffd670:    0x3a31333b    0x7a642e2a    0x3b31303d    0x2a3a3133
0xffffd680:    0x3d7a672e    0x333b3130    0x2e2a3a31    0x303d7a6c
0xffffd690:    0x31333b31    0x782e2a3a    0x31303d7a    0x3a31333b
0xffffd6a0:    0x7a622e2a    0x31303d32    0x3a31333b    0x7a622e2a
0xffffd6b0:    0x3b31303d    0x2a3a3133    0x7a62742e    0x3b31303d
0xffffd6c0:    0x2a3a3133    0x7a62742e    0x31303d32    0x3a31333b
0xffffd6d0:    0x7a742e2a    0x3b31303d    0x2a3a3133    0xe
0xffffd6e0:    0x3b31303d    0x2a3a3133    0x6d70722e    0x3b31303d
0xffffd6f0:    0x2a3a3133    0x72616a2e    0x3b31303d    0x2a3a3133
gdb-peda$ 
0xffffd700:    0xe    0x3b31303d    0x2a3a3133    0xe
0xffffd710:    0x3b31303d    0x2a3a3133    0xe    0x3b31303d
0xffffd720:    0x2a3a3133    0xe    0x3b31303d    0x2a3a3133
0xffffd730:    0xe    0x3b31303d    0x2a3a3133    0x6f6f7a2e
0xffffd740:    0x3b31303d    0x2a3a3133    0xe    0x31303d6f
0xffffd750:    0x3a31333b    0x7a372e2a    0x3b31303d    0x2a3a3133
0xffffd760:    0x3d7a722e    0x333b3130    0x2e2a3a31    0x3d67706a
0xffffd770:    0x333b3130    0x2e2a3a35    0xa    0x3b31303d
0xffffd780:    0x2a3a3533    0xe    0x3b31303d    0x2a3a3533
0xffffd790:    0x706d622e    0x3b31303d    0x2a3a3533    0x6d62702e
0xffffd7a0:    0x3b31303d    0x2a3a3533    0x6d67702e    0x3b31303d
0xffffd7b0:    0x2a3a3533    0x6d70702e    0x3b31303d    0x2a3a3533
0xffffd7c0:    0xe    0x3b31303d    0x2a3a3533    0x6d62782e
0xffffd7d0:    0x3b31303d    0x2a3a3533    0x6d70782e    0x3b31303d
0xffffd7e0:    0x2a3a3533    0xe    0x3b31303d    0x2a3a3533
0xffffd7f0:    0xe    0x31303d66    0x3a35333b    0x6e702e2a
0xffffd800:    0x31303d67    0x3a35333b    0x76732e2a    0x31303d67
0xffffd810:    0x3a35333b    0x76732e2a    0x303d7a67    0x35333b31
0xffffd820:    0x6d2e2a3a    0x303d676e    0x35333b31    0x702e2a3a
0xffffd830:    0x303d7863    0x35333b31    0x6d2e2a3a    0x303d766f
0xffffd840:    0x35333b31    0x6d2e2a3a    0x303d6770    0x35333b31
0xffffd850:    0x6d2e2a3a    0x3d    0x333b3130    0x2e2a3a35
0xffffd860:    0x3d76326d    0x333b3130    0x2e2a3a35    0x3d766b6d
0xffffd870:    0x333b3130    0x2e2a3a35    0x6d    0x3b31303d
0xffffd880:    0x2a3a3533    0x6d676f2e    0x3b31303d    0x2a3a3533
0xffffd890:    0x34706d2e    0x3b31303d    0x2a3a3533    0x76346d2e
0xffffd8a0:    0x3b31303d    0x2a3a3533    0x34706d2e    0x31303d76
0xffffd8b0:    0x3a35333b    0x6f762e2a    0x31303d62    0x3a35333b
0xffffd8c0:    0x74712e2a    0x3b31303d    0x2a3a3533    0x76756e2e
0xffffd8d0:    0x3b31303d    0x2a3a3533    0x766d772e    0x3b31303d
0xffffd8e0:    0x2a3a3533    0xe    0x3b31303d    0x2a3a3533
0xffffd8f0:    0x3d6d722e    0x333b3130    0x2e2a3a35    0x62766d72
0xffffd900:    0x3b31303d    0x2a3a3533    0x636c662e    0x3b31303d
0xffffd910:    0x2a3a3533    0xe    0x3b31303d    0x2a3a3533
0xffffd920:    0x696c662e    0x3b31303d    0x2a3a3533    0x766c662e
0xffffd930:    0x3b31303d    0x2a3a3533    0x3d6c672e    0x333b3130
0xffffd940:    0x2e2a3a35    0x303d6c64    0x35333b31    0x782e2a3a
0xffffd950:    0x303d6663    0x35333b31    0x782e2a3a    0x303d6477
0xffffd960:    0x35333b31    0x792e2a3a    0x303d7675    0x35333b31
0xffffd970:    0x632e2a3a    0x303d6d67    0x35333b31    0x652e2a3a
0xffffd980:    0x303d666d    0x35333b31    0x612e2a3a    0x303d7678
0xffffd990:    0x35333b31    0x612e2a3a    0x303d786e    0x35333b31
0xffffd9a0:    0x6f2e2a3a    0x303d7667    0x35333b31    0x6f2e2a3a
0xffffd9b0:    0x303d7867    0x35333b31    0x612e2a3a    0x303d6361
0xffffd9c0:    0x36333b30    0x612e2a3a    0x30303d75    0x3a36333b
0xffffd9d0:    0x6c662e2a    0x303d6361    0x36333b30    0x6d2e2a3a
0xffffd9e0:    0x303d6469    0x36333b30    0x6d2e2a3a    0x3d
0xffffd9f0:    0x333b3030    0x2e2a3a36    0x3d616b6d    0x333b3030
0xffffda00:    0x2e2a3a36    0x3d33706d    0x333b3030    0x2e2a3a36
0xffffda10:    0x3d63706d    0x333b3030    0x2e2a3a36    0x3d67676f
gdb-peda$ quit
ningan@ubuntu:~/anan/test$ 
ningan@ubuntu:~/anan/test$ 
ningan@ubuntu:~/anan/test$ ll
total 28
drwxrwxr-x 2 ningan ningan 4096 May 18 22:08 ./
drwxrwxr-x 7 ningan ningan 4096 May 18 20:04 ../
-rw------- 1 ningan ningan  294 May 18 22:08 .gdb_history
-rw-rw-r-- 1 ningan ningan    7 May 18 20:33 peda-session-ret2text.txt
-rwxrwxrwx 1 ningan ningan 9915 May 18 20:01 ret2text*
ningan@ubuntu:~/anan/test$ vim exp.py
ningan@ubuntu:~/anan/test$ 
ningan@ubuntu:~/anan/test$ python exp.py ret2text
  File "exp.py", line 7
SyntaxError: Non-ASCII character '\xe5' in file exp.py on line 7, but no encoding declared; see http://www.python.org/peps/pep-0263.html for details
ningan@ubuntu:~/anan/test$ vim exp.py
ningan@ubuntu:~/anan/test$ python exp.py ret2text
[+] Starting local process './ret2text': pid 3807
[*] '/home/ningan/anan/test/ret2text'
    Arch:     i386-32-little
    RELRO:    Partial RELRO
    Stack:    No canary found
    NX:       NX enabled
    PIE:      No PIE (0x)
[*] Switching to interactive mode
There is something amazing here, do you know anything?
Maybe I will tell you next time !$ ls
exp.py    peda-session-ret2text.txt  ret2text
$