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Cannot Find Bounds Of Current Function Code Blocks

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for (i = 0; i < 16384; i++) { Avoid naked magic numbers #define ASIZE (16384) int *inser = malloc(ASIZE * sizeof(int)); ... gdb works fine on the kernel executable itself. (For those who really want to know, I'm inserting code at runtime into Linux kernel data space inside a VMware VM and debugging It a simple stack based buffer overflow exploit. What should I do next? check over here

Browse other questions tagged linux assembly gdb x86 linux-kernel or ask your own question. Join them; it only takes a minute: Sign up Cannot find bounds of Current function up vote 0 down vote favorite I'm implementing an insertion sort on a 16384 array on To do that, gdb must use some extra information, such as: symbol tables, which tell where each function begins in the executable file, and possibly their size; debug information (added by Logged jens Administrator Lives here! http://stackoverflow.com/questions/8741493/why-i-do-get-cannot-find-bound-of-current-function-when-i-overwrite-the-ret-ad

Cannot Find Bounds Of Current Function Code Blocks

But subsequent "execute next line"s or "step into"s did not give me more "qwe"s, but instead the error message I wrote about. –Ludwik Dec 27 '14 at 11:54 add a comment| Logged Send this topic Print Pages: [1] Go Up « previous next » Code::Blocks » User forums » General (but related to Code::Blocks) » Cannot find bounds of current function? share|improve this answer answered Jan 6 '15 at 22:19 Ludwik 595619 add a comment| Your Answer draft saved draft discarded Sign up or log in Sign up using Google Sign

Logged Martin_fr Administrator Hero Member Posts: 4054 Re: Cannot find bounds of current function error « Reply #1 on: January 26, 2014, 03:17:46 pm » Try to set a breakpoint on If instead you tried: (gdb) target extended-remote 192.168.0.10:1234 Remote debugging using 192.168.0.10:1234 0x400009c0 in ?? () (gdb) break main Breakpoint 1 at 0x8048338: file main.c, line 8. (gdb) c Breakpoint 1, Logged Martin_fr Administrator Hero Member Posts: 4054 Re: Cannot find bounds of current function error « Reply #10 on: January 29, 2014, 12:39:53 pm » See Image Logged KMagic Full Member Gdb Print Stack It overwrites the current stack frame of your function with irrelevant data, and destroys the return address in the process, which is normally stored there among other things.

I got this from reading the message below but somebody else reading this post might not be as patient. –Dmitry Apr 14 at 18:47 add a comment| up vote 115 down Gdb Step Cannot Find Bounds Of Current Function This windows appeared: http://postimg.org/image/uaf7fnfbf/ Can anyone help me with this problem? After debugging with gdb I found the address of the shell code as it will pass as a parameter, and right after the strcpy I examine the stack and the $ebp+8 http://stackoverflow.com/questions/2420813/using-gdb-to-single-step-assembly-code-outside-specified-executable-causes-error asked 2 years ago viewed 3327 times active 2 years ago Upcoming Events 2016 Community Moderator Election ends Nov 22 Related 4C++ Eclipse debugger: “Cannot find bounds of current function” and

by Leledumbo [Today at 05:01:03 pm] Synapse THttpSend unusual... Gdb Set Breakpoint Product catalog Why do languages require parenthesis around expressions when used with "if" and "while"? Code: [Select]C:\lazarus\lazarus.exe --debug-log=C:\mylazlog.txt --debug-enable=DBG_CMD_ECHO,DBG_STATE,DBG_DATA_MONITORS,DBGMI_QUEUE_DEBUG,DBGMI_TYPE_INFO
Logged KMagic Full Member Posts: 100 Re: Cannot find bounds of current function error « Reply #13 on: January 30, 2014, 09:34:20 pm » Finally, I I attach the source code.I can not reproduce the bug, step into works fine.(I'm using PCX mingw 4.6.3 and gdb CVS head build myself) Logged If some piece of memory should

  1. up vote 3 down vote favorite 1 I want to exploit a stack based buffer overflow for education purposes.There is a typical function called with a parameter from main which is
  2. Join them; it only takes a minute: Sign up Using gdb to single-step assembly code outside specified executable causes error “cannot find bounds of current function” up vote 57 down vote
  3. Why did Michael Corleone not forgive his brother Fredo?
  4. How do I handle this?
  5. Query for highest version Should I allow my child to make an alternate meal if they do not like anything served at mealtime?
  6. He is able to make the jump so its not a canary and aslr is pretty obvious when you trying to determine a good return address. –rook Jan 6 '12 at
  7. Type "layout asm", "start" instead.
  8. If you had 'objdump -h' the program you are trying to debug, you would have found that 0x400009c0 is is *way* outside the bounds of the program.
  9. Is it because of incompatible debug info, an issue about arch, a too big gap between the LLVM GCC 4.2 and FSF GDB 7.6... ?
  10. Why is Professor Lewin correct regarding dimensional analysis, and I'm not?

Gdb Step Cannot Find Bounds Of Current Function

In retrospect I don't how I forgot about stepi. http://security.stackexchange.com/questions/10404/why-do-i-get-cannot-find-bound-of-current-function-when-i-overwrite-the-ret-ad the libc code), not to some emplacement in the stack; ASLR moves libc around to make hit a hard target. Cannot Find Bounds Of Current Function Code Blocks How to delete the lines from a file that do not contain dot? Gdb Single Step Assembly When you do that you might realize that your loops will step out of bounds. –Some programmer dude Apr 3 '14 at 13:20 5 i<=16384 --> i<16384 –BLUEPIXY Apr 3

by WickedDum [Today at 06:03:37 pm] Raspberry Pi 3 - Lazarus ... http://homeshareware.com/cannot-find/cygwin-cannot-find.html When you CLOSE it, you kill your app. I tried to rebuild my project passing an explicit "-ggdb" option rather than the implicit "-g", but it doesn't change anything (same error during stepping). Can I cite email communication in my thesis/paper? Gdb Disassemble

funcb(); } funcb() { funcc(); .... .... .... //it works fine till here then the throws error } funcc() { } sample of the error (gdb) 114 }(gdb) (gdb) 114 }0x08040054 Using malloc() is the right call here. –Emmet Apr 3 '14 at 15:38 add a comment| up vote 0 down vote Your first for loop is going to run 16385 times, Logged Fedora package maintainer for Code::BlocksJens' Debian - nightlies (and release)Fedora [23 - 25]- and CentOS/RedHat 7 - nightlies ollydbg Developer Lives here! http://homeshareware.com/cannot-find/usr-bin-ld-cannot-find-lz.html for (i = 0; i < 16384; i++) { ...

And a serious hacker could add much much more. –ugoren Jan 5 '12 at 19:51 I wanted to pass it just as an input argument to the prog which Gdb Cheat Sheet There are several protection mechanisms related to buffer overflows in a Linux system (I assume you are using Linux): The stack can be marked as "non executable". How to make my logo color look the same in Web & Print?

asked 4 years ago viewed 2978 times active 4 years ago Related 3Stack smashing keep getting segmentation fault16Exploiting buffer overflow leads to segfault0Stack buffer overflow: Is compiler changing variables order, preventing

Would we find alien music meaningful? Scenario: buffer overflow tutorial test1segmentation fault while running shellcode2Why is eip not being overwritten with the shellcode I am overflowing with?0reverse move in stack without jmp3Shellcode Segfault - testcase vs strcpy Total distance traveled when visiting all rational numbers How to decline a postdoc interview if there is some possible future collaboration? Gdb Commands I use dependancies ,but when I debug the dllcall , it still prompted cannot find the .dll.I use project dependancy (check the dll box) and external dependany ( add the .dll)Can

On this line, when j starts off as zero, j becomes -1. Logged Fedora package maintainer for Code::BlocksJens' Debian - nightlies (and release)Fedora [23 - 25]- and CentOS/RedHat 7 - nightlies huzhongshan Multiple posting newcomer Posts: 109 Re: Cannot find bounds of current Just learned this method from you. http://homeshareware.com/cannot-find/usr-bin-ld-cannot-find-lz-centos.html My guess is that the pages containing the stack are marked as non-executable, so when jumping to the "shell code", the kernel traps, and kills the offending process.

Join them; it only takes a minute: Sign up Why I do get “Cannot find bound of current function” when I overwrite the ret address of a vulnerable program? Should I allow my child to make an alternate meal if they do not like anything served at mealtime? This makes it much harder for the attacker to guess what will be the value he wants to store (through a buffer overflow) over the "return address" slot. Why is (a % 256) different than (a & 0xFF)?

share|improve this answer answered Jan 5 '12 at 16:07 ugoren 11.5k11939 Why i am not in any function? cout << "Hello world!" << endl; return 0;}I think GetFileName changes the directory , and then cb(gdb) can not step in the Next function(in dll).I use CB 12.11 with gcc A guy scammed me, but he gave me a bank account number & routing number. It will have trouble doing things that require more complicated interpretation: It cannot figure out where stack frames are, it cannot find local variables by name, and so on.

However, I still encounter this problem. But you probably have another problem in addition to that. –Steve Jessop Jan 5 '12 at 11:30 How could i add debug info for the nop instruction, which is On x86 32-bit processors, this can be achieved with segments (a remnant from older times) or through the MMU (either with the NX bit, on machines which support it, or with This tells gdb to disassemble the current instruction just before printing the prompt each time; then you can just keep hitting Enter to repeat the stepi command. (See my answer to

When the debugger tries to figure out which function this address is in, it fails, because the address is not in any of the functions in your program. for (i = 1; i < 16384; i++) { ... Recent versions of gcc will generate some extra hidden code which verifies whether a buffer overflow occurred before doing the fateful ret.

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