/* See glibc-2.5/elf/stackguard-macros.h for non-x86 STACK_CHK_GUARD's */

#include <stdio.h>
#include <unistd.h>
#include <stdint.h>

# define STACK_CHK_GUARD \
  ({ uintptr_t x; asm ("movl %%gs:0x14, %0" : "=r" (x)); x; })

int overflow(char *test) {
  char buffer[7];
  sprintf(buffer, "12345678901234567890123456789012345678901234567890");
  return(1234);
}
int main(int argc, char **argv) {
  printf("__stack_chk_guard\t=\t0x%08x;\n", STACK_CHK_GUARD);
  overflow("test");
  printf("This line should never get printed.\n");
}