35 lines
482 B
ArmAsm
35 lines
482 B
ArmAsm
|
/*
|
||
|
|
* 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
|
||
|
|
jmp 2f
|
||
|
|
1: call _do_wp_page
|
||
|
|
2: addl $8,%esp
|
||
|
|
pop %fs
|
||
|
|
pop %es
|
||
|
|
pop %ds
|
||
|
|
popl %edx
|
||
|
|
popl %ecx
|
||
|
|
popl %eax
|
||
|
|
iret
|