i386/junos/standford/2004/src/lab5/user/faultbadhandler.c

   1 // test bad pointer for user-level fault handler
   2 // this is going to fault in the fault handler accessing eip (always!)
   3 // so eventually the kernel kills it (PFM_KILL) because
   4 // we outrun the stack with invocations of the user-level handler
   5
   6 #include <inc/lib.h>
   7
   8 void
   9 umain(void)
  10 {
  11         sys_mem_alloc(0, UXSTACKTOP-BY2PG, PTE_P|PTE_U|PTE_W);
  12         sys_set_pgfault_entry(0, 0xDeadBeef);
  13         *(int*)0 = 0;
  14 }