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

   1 /* Invokes a system call with the stack pointer (%esp) set to a
   2    bad address.  The process must be terminated with -1 exit
   3    code.
   4
   5    For Project 3: The bad address lies approximately 64MB below
   6    the code segment, so there is no ambiguity that this attempt
   7    must be rejected even after stack growth is implemented.
   8    Moreover, a good stack growth heuristics should probably not
   9    grow the stack for the purpose of reading the system call
  10    number and arguments. */
  11
  12 #include "tests/lib.h"
  13 #include "tests/main.h"
  14
  15 void
  16 test_main (void)
  17 {
  18   asm volatile ("movl . - (64*1024*1024), %esp; int $0x30");
  19   fail ("should have called exit(-1)");
  20 }