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/*

Filename: pushstack.c

Author: Daniel Sauder

Website: http://govolution.wordpress.com/

License: http://creativecommons.org/licenses/by-sa/3.0/

- generate asm code that pushes a given string on the stack in reverse order

- fill up with empty spaces if neccessary

*/

#include <stdio.h>

#include <string.h>

int main(int argc, char **argv)

{

if(argv[1]==NULL)

{

printf("usage: pushstack \"foo bar\"\n");

return 0;

}

char *buf=argv[1];

int l=strlen(buf);

int x;

// fill with spaces if neccessary

int ll=4-(l%4);

if (ll!=4)

{

printf("push 0x");

for (x=0;x<ll;x++)

printf("20");

}

// printf asm code to screen

for (x=l; x>0; x--)

{

if ((x%4)==0) printf("push 0x");

printf("%02X",buf[x-1]);

if ((x%4)==1) printf("\n");

}

printf("\n");

return 0;

}