Undefined symbol?

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sunnysigil

Joined: 18 Jun 2014
Posts: 6

sunnysigil 18 Jun 2014, 20:53

I'm trying to implement ptrace within my ELF but I get the undefined symbol error regarding PTRACE_ATTACH when I attempt to compile it, here's a snippet of the code.

Code:

section '.text' executable
public main
extrn  printf
extrn  ptrace
extrn  exit
main:
      ccall ptrace,PTRACE_ATTACH,mypid,0,0

Could anyone point towards what's going wrong?

18 Jun 2014, 20:53

HaHaAnonymous

Joined: 02 Dec 2012
Posts: 1178
Location: Unknown

HaHaAnonymous 18 Jun 2014, 21:43

[ Post removed by author. ]

Last edited by HaHaAnonymous on 28 Feb 2015, 18:10; edited 1 time in total

18 Jun 2014, 21:43

sunnysigil

Joined: 18 Jun 2014
Posts: 6

sunnysigil 18 Jun 2014, 21:58

HaHaAnonymous wrote:

Quote:

Could anyone point towards what's going wrong?

PTRACE_ATTACH is not defined.

So how would one get around this?

18 Jun 2014, 21:58

typedef

Joined: 25 Jul 2010
Posts: 2893
Location: 0x77760000

typedef 18 Jun 2014, 22:26

Code:

PTRACE_ATTACH equ 16

http://fossies.org/dox/glibc-2.19/ports_2sysdeps_2unix_2sysv_2linux_2aarch64_2sys_2ptrace_8h.html

18 Jun 2014, 22:26

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