23 lines
577 B
C
23 lines
577 B
C
|
/* Invokes a system call with one byte of the system call's
|
||
|
|
argument on a separate page from the rest of the bytes. This
|
||
|
|
must work. */
|
||
|
|
|
||
|
|
#include <syscall-nr.h>
|
||
|
|
#include "tests/userprog/boundary.h"
|
||
|
|
#include "tests/lib.h"
|
||
|
|
#include "tests/main.h"
|
||
|
|
|
||
|
|
void
|
||
|
|
test_main (void)
|
||
|
|
{
|
||
|
|
/* Make one byte of a syscall argument hang over into a second
|
||
|
|
page. */
|
||
|
|
int *p = (int *) ((char *) get_boundary_area () - 7);
|
||
|
|
p[0] = SYS_EXIT;
|
||
|
|
p[1] = 67;
|
||
|
|
|
||
|
|
/* Invoke the system call. */
|
||
|
|
asm volatile ("movl %0, %%esp; int $0x30" : : "g" (p));
|
||
|
|
fail ("should have called exit(67)");
|
||
|
|
}
|