1  /* Test program for making nonexecutable stacks executable
       2     on DT_NEEDED load of a DSO that requires executable stacks.  */
       3  
       4  #include <dlfcn.h>
       5  #include <stdio.h>
       6  #include <string.h>
       7  #include <unistd.h>
       8  #include <error.h>
       9  
      10  extern void tryme (void);	/* from tst-execstack-mod.so */
      11  
      12  static void deeper (void (*f) (void));
      13  
      14  static int
      15  do_test (void)
      16  {
      17    tryme ();
      18  
      19    /* Test that growing the stack region gets new executable pages too.  */
      20    deeper (&tryme);
      21  
      22    return 0;
      23  }
      24  
      25  static void
      26  deeper (void (*f) (void))
      27  {
      28    char stack[1100 * 1024];
      29    explicit_bzero (stack, sizeof stack);
      30    (*f) ();
      31    memfrob (stack, sizeof stack);
      32  }
      33  
      34  #include <support/test-driver.c>