/* check that no subpage of the superpage is readable */
boolean_t
check_nr(mach_vm_address_t addr, mach_vm_size_t size, int *res) {
int i;
boolean_t ret;
for (i=0; i<size/PAGE_SIZE; i++) {
if ((ret = check_r(addr+i*PAGE_SIZE, PAGE_SIZE, res))) {
sprintf(error, "page still readable");
return FALSE;
}
}
return TRUE;
}
boolean_t
check_rw(mach_vm_address_t addr, mach_vm_size_t size) {
int ret;
int res;
if (!(ret = check_w(addr, size))) return ret;
if (!(ret = check_r(addr, size, &res))) return ret;
if ((size==SUPERPAGE_SIZE) && (res!=0xfff00000)) {
sprintf(error, "checksum error");
return FALSE;
}
return TRUE;
}
void ps1_checker_2(s_ps1 ps1_st,
bool *escaped,
bool *checked)
{
check_n(ps1_st, escaped, checked);
check_dollar(ps1_st, escaped, checked);
check_a(ps1_st, escaped, checked);
check_e(ps1_st, escaped, checked);
check_r(ps1_st, escaped, checked);
}
/*
* The mmap() interface should work just as well!
*/
boolean_t
test_mmap() {
int kr, ret;
uintptr_t addr = 0;
int size = SUPERPAGE_SIZE;
addr = (uintptr_t)mmap((void*)addr, size, PROT_READ, MAP_ANON | MAP_PRIVATE, VM_FLAGS_SUPERPAGE_SIZE_2MB, 0);
if (addr == (uintptr_t)MAP_FAILED) {
sprintf(error, "mmap()");
return FALSE;
}
if (!(ret = check_addr0(addr, "mach_vm_allocate"))) return ret;
if (!(ret = check_align(addr))) return ret;
if (!(ret = check_r(addr, SUPERPAGE_SIZE, NULL))) return ret;
if (!(ret = check_nw(addr, SUPERPAGE_SIZE))) return ret;
kr = munmap((void*)addr, size);
if (!(ret = check_kr(kr, "munmap"))) return ret;
if (!(ret = check_nr(addr, size, NULL))) return ret;
return TRUE;
}
/*
* If we try to write-protect a sub-page of a superpage
* - the call should succeed
* - the complete memory should remain readable
* - the complete memory should not be writable
*/
boolean_t
test_readonlysubpage() {
int kr;
int ret;
mach_vm_address_t addr = 0;
mach_vm_size_t size = SUPERPAGE_SIZE;
kr = mach_vm_allocate(mach_task_self(), &addr, size, VM_FLAGS_ANYWHERE | VM_FLAGS_SUPERPAGE_SIZE_2MB);
if (!(ret = check_kr(kr, "mach_vm_allocate"))) return ret;
mach_vm_protect(mach_task_self(), addr+PAGE_SIZE, PAGE_SIZE, 0, VM_PROT_READ);
if (!(ret = check_kr(kr, "mach_vm_protect"))) return ret;
if (!(ret = check_r(addr, size, NULL))) return ret;
if (!(ret = check_nw(addr, size))) return ret;
kr = mach_vm_deallocate(mach_task_self(), addr, size);
if (!(ret = check_kr(kr, "mach_vm_deallocate"))) return ret;
return TRUE;
}
