sc-bad-sp.c

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