gdbserver_tests/self_invalidate.c

   1 /* Based on reproducer done by Dejan Jevtic */
   2 int main (void)
   3 {
   4 #if defined(VGA_amd64)
   5    /* Note that small changes in the code below
   6       caused the bug not to be triggered anymore.
   7       E.g. removing the dec %%eax avoids the assert
   8       while this removal causes one more loop to be
   9       executed. */
  10 __asm__ __volatile__
  11    ("mov $30, %%eax\n\t"
  12     "top:\n\t"
  13     "mov $-4, %%ebx\n\t"
  14     "add %%ebx, %%eax\n\t"
  15     "dec %%eax\n\t"
  16     "cmp    $0x0,%%eax\n\t"
  17     "jne top\n\t"
  18     "mov $60, %%eax\n\t"
  19     "mov $0, %%rdi\n\t"
  20     "syscall\n\t"
  21     : : : "eax", "ebx", "rdi"
  22     );
  23 #elif defined(VGA_mips32) || defined(VGA_mips64)
  24 __asm__ __volatile__
  25    ("li $t0, 42\n\t"
  26     "top:\n\t"
  27     "li $t1, -4\n\t"
  28     "addu $t0, $t0, $t1\n\t"
  29     "li $t2, -2\n\t"
  30     "addu $t0, $t0, $t2\n\t"
  31     "addiu $t0, $t0, -1\n\t"
  32     "bnez $t0, top\n\t"
  33     "nop\n\t"
  34     : : : "t0", "t1"
  35     );
  36 #endif
  37  return 0;
  38 }