int MPTIntro_test1()
{
set_pdir_base(0);
if ((unsigned int)PDirPool[0] != rcr3()) {
dprintf("test 1 failed.\n");
return 1;
}
set_pdir_entry_identity(1, 1);
set_pdir_entry(1, 2, 100);
if (get_pdir_entry(1, 1) != (unsigned int)IDPTbl[1] + 7) {
dprintf("test 1 failed.\n");
return 1;
}
if (get_pdir_entry(1, 2) != 409607) {
dprintf("test 1 failed.\n");
return 1;
}
rmv_pdir_entry(1, 1);
rmv_pdir_entry(1, 2);
if (get_pdir_entry(1, 1) != 0 || get_pdir_entry(1, 2) != 0) {
dprintf("test 1 failed.\n");
return 1;
}
dprintf("test 1 passed.\n");
return 0;
}
int
mon_start_user (int argc, char **argv, struct Trapframe *tf)
{
if (CID != 0)
{
dprintf(
"The process is already running. If you want to run the program again, please restart qemu.\n");
return 0;
}
uint8_t * exe = _binary___obj_proc_dummy_dummy_start;
CID = alloc_mem_quota (0, 1024 * 1024);
elf_load (exe, CID);
dprintf("Program 0x%08x is loaded.\n", exe);
set_pdir_base (CID);
entry_t entry = (entry_t) elf_entry (exe);
entry();
return 0;
}
void proc_start_user(void)
{
unsigned int cur_pid = get_curid();
static int first = TRUE;
kstack_switch(cur_pid);
set_pdir_base(cur_pid);
trap_return((void *) &uctx_pool[cur_pid]);
}
void trap (tf_t *tf)
{
unsigned int cur_pid;
unsigned int in_kernel;
cur_pid = get_curid ();
set_pdir_base (0); //switch to the kernel's page table.
trap_cb_t f;
f = TRAP_HANDLER[get_pcpu_idx()][tf->trapno];
if (f){
f(tf);
} else {
KERN_WARN("No handler for user trap 0x%x, process %d, eip 0x%08x. \n",
tf->trapno, cur_pid, tf->eip);
}
kstack_switch(cur_pid);
set_pdir_base(cur_pid);
trap_return((void *) tf);
}
/**
* Initializes the page structures,
* move to the page structure # 0 (kernel).
* and turn on the paging.
*/
void paging_init(unsigned int mbi_addr)
{
pdir_init_kern(mbi_addr);
set_pdir_base(0);
enable_paging();
}
