linux and the c library

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ackit

Joined: 08 Sep 2008
Posts: 3

ackit 08 Sep 2008, 10:07

i was hoping if someone could show me a simple example of using printf with fasm on linux.

08 Sep 2008, 10:07

revolution
When all else fails, read the source

Joined: 24 Aug 2004
Posts: 20344
Location: In your JS exploiting you and your system

revolution 08 Sep 2008, 10:11

The libcdemo example in the fasm download shows how to use printf.

Code:

; fasm example of using the C library in linux

; compile the source with commands like:
;   fasm libcdemo.asm libcdemo.o
;   gcc libcdemo.o -o libcdemo
;   strip libcdemo

format ELF

include 'cdecl.inc'

section '.text' executable

 public main
 extrn printf
 extrn getpid

 main:
  call    getpid
      ccall   printf, msg,eax
     ret

section '.data' writeable

 msg db "Current process ID is %d.",0xA,0

08 Sep 2008, 10:11

ackit

Joined: 08 Sep 2008
Posts: 3

ackit 08 Sep 2008, 19:22

ahh yes, thank you very much, got it working.

08 Sep 2008, 19:22

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