root/mm/page.s

/* */

   1 /*
   2  *  linux/mm/page.s
   3  *
   4  *  (C) 1991  Linus Torvalds
   5  */
   6 
   7 /*
   8  * page.s contains the low-level page-exception code.
   9  * the real work is done in mm.c
  10  */
  11 
  12 .globl _page_fault
  13 
  14 _page_fault:
  15         xchgl %eax,(%esp)
  16         pushl %ecx
  17         pushl %edx
  18         push %ds
  19         push %es
  20         push %fs
  21         movl $0x10,%edx
  22         mov %dx,%ds
  23         mov %dx,%es
  24         mov %dx,%fs
  25         movl %cr2,%edx
  26         pushl %edx
  27         pushl %eax
  28         testl $1,%eax
  29         jne 1f
  30         call _do_no_page
  31         jmp 2f
  32 1:      call _do_wp_page
  33 2:      addl $8,%esp
  34         pop %fs
  35         pop %es
  36         pop %ds
  37         popl %edx
  38         popl %ecx
  39         popl %eax
  40         iret

/* */