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


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/* Sticks a system call number (SYS_EXIT) at the very top of the
   stack, then invokes a system call with the stack pointer
   (%esp) set to its address.  The process must be terminated
   with -1 exit code because the argument to the system call
   would be above the top of the user address space. */

#include <syscall-nr.h>
#include "tests/lib.h"
#include "tests/main.h"

void
test_main (void) 
{
  asm volatile ("movl $0xbffffffc, %%esp; movl %0, (%%esp); int $0x30"
                : : "i" (SYS_EXIT));
  fail ("should have called exit(-1)");
}