1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
|
.text
#include <linux/config.h>
#include <linux/threads.h>
#include <linux/linkage.h>
#include <asm/segment.h>
#include <asm/page.h>
#include <asm/pgtable.h>
#include <asm/desc.h>
/* Offsets in start_info structure */
#define MOD_START 20
#define MOD_LEN 24
startup_32:
cld
lss stack_start,%esp
/* Copy initrd somewhere safe before it's clobbered by BSS. */
mov MOD_LEN(%esi),%ecx
shr $2,%ecx
jz 2f /* bail from copy loop if no initrd */
mov $SYMBOL_NAME(_end),%edi
add MOD_LEN(%esi),%edi
mov MOD_START(%esi),%eax
add MOD_LEN(%esi),%eax
1: sub $4,%eax
sub $4,%edi
mov (%eax),%ebx
mov %ebx,(%edi)
loop 1b
mov %edi,MOD_START(%esi)
/* Clear BSS first so that there are no surprises... */
2: xorl %eax,%eax
movl $SYMBOL_NAME(__bss_start),%edi
movl $SYMBOL_NAME(_end),%ecx
subl %edi,%ecx
rep stosb
/* Copy the necessary stuff from start_info structure. */
mov $SYMBOL_NAME(start_info_union),%edi
mov $128,%ecx
rep movsl
jmp SYMBOL_NAME(start_kernel)
ENTRY(stack_start)
.long SYMBOL_NAME(init_task_union)+8192, __KERNEL_DS
.org 0x1000
ENTRY(empty_zero_page)
.org 0x2000
ENTRY(default_ldt)
.org 0x3000
ENTRY(cpu0_pte_quicklist)
.org 0x3400
ENTRY(cpu0_pgd_quicklist)
.org 0x3800
ENTRY(stext)
ENTRY(_stext)
|
