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/*
* linux/mm/page.s
*
* (C) 1991 Linus Torvalds
*/
/*
* page.s contains the low-level page-exception code.
* the real work is done in mm.c
*/
.globl _page_fault
_page_fault:
xchgl %eax,(%esp)
pushl %ecx
pushl %edx
push %ds
push %es
push %fs
movl $0x10,%edx
mov %dx,%ds
mov %dx,%es
mov %dx,%fs
movl %cr2,%edx
pushl %edx
pushl %eax
testl $1,%eax
jne 1f
call _do_no_page//调用缺页中断处理函数，error_code是有CPU自动产生的，mm/memory.c line 365
jmp 2f
1: call _do_wp_page//调用写保护处理函数,error_code是有CPU自动产生的，mm/memory.c line 247
2: addl $8,%esp
pop %fs
pop %es
pop %ds
popl %edx
popl %ecx
popl %eax
iret
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