.globl enter_pmode
  .type enter_pmode,%function

enter_pmode:
  .func enter_pmode
  cli
  mov %cr0, %eax
  or  $1, %eax
  mov %eax, %cr0
  ljmp $0x8, $pmode

.code32
pmode:
  mov $0x10, %ax
  mov %ax, %ds
  mov %ax, %ss
  mov %ax, %es
  mov %ax, %fs
  mov %ax, %gs
  mov $0x90000, %esp
  lret