src/tests/userprog/sc-bad-arg.c

   1 /* Sticks a system call number (SYS_EXIT) at the very top of the
   2    stack, then invokes a system call with the stack pointer
   3    (%esp) set to its address.  The process must be terminated
   4    with -1 exit code because the argument to the system call
   5    would be above the top of the user address space. */
   6
   7 #include <syscall-nr.h>
   8 #include "tests/lib.h"
   9 #include "tests/main.h"
  10
  11 void
  12 test_main (void)
  13 {
  14   asm volatile ("movl $0xbffffffc, %%esp; movl %0, (%%esp); int $0x30"
  15                 : : "i" (SYS_EXIT));
  16   fail ("should have called exit(-1)");
  17 }