大侠,帮我看看这段保护模式代码,怎么编译时候出了这么多错误呀.!!!!!!!!!
;--------------------------------------------------------
ea20 macro //打开A20地址线
push ax
in al,92h
or al,00000010b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
;关闭A20地址线
;----------------------------------------------------------------------------
da20 macro
push ax
in al,92h
and al,11111101b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
jump macro selector,offsetv //跳转宏
db 0EAh
dw offsetv
dw selector
endm
;--------------------
descriptor struc //描述符的结构
limitl dw 0
basel dw 0
basem db 0
attributes dw 0
baseh db 0
descriptor ends
;--------------------
pdesc struc //伪描述府
limit dw 0
base dd 0
pdesc ends
;
atdw=92h
atce=98h
atcer=9ah
atldt=82h
TIL=1
.386P
;---------------------------------------------------------------------------------------
gdtseg segment use16
gdt label byte
dummy descriptor <>
code descriptor <0FFFFh,,,atce,>
code_sel=code-gdt
;代码段codekseg的描述符
codek descriptor <0FFFFh,,,atdw,>
codek_sel=codek-gdt
;通用描述符
normal descriptor <0FFFFh,,,atdw,>
normal_sel=normal-gdt
;局部描述表的描述符
ldtable descriptor <0FFFFh,,,atldt,>
ldt_sel=ldtable-gdt
gdtlen=$-gdt
vgdtr pdesc <gdtlen-1,>
gdtseg ends
;------------------------------------------------------------------
;局部描述表
ldtseg segment use16
ldt label byte
;数据段ldtseg的描述符
data descriptor <0FFFFh,,,atdw,>
data_sel=(data-ldt)+TIL
;代码段vcode的描述符
vcode descriptor <0FFFFh,,,atce,>
vcode_sel=(vcode-ldt)+TIL
;要显示的数据
vdata descriptor <0FFFFh,,,atdw,>
vdata_sel=(vdata-ldt)+TIL
;要显示的数据2
vdata1 descriptor <0FFFFh,,,atdw,>
vdata1_sel=(vdata1-ldt)+TIL
;
vbuf descriptor <0FFFFh,8000,0b,atdw,>
vbuf_sel=(vbuf-ldt)+TIL
ldtseg ends
;-----------------------------------------------------
;代码段
vdseg segment use16
yang db 'how are you',0
vdseg ends
;-----------------------------------------------------
vdseg1 segment use16
hello db 'hello',0
hellolen=$-hello
vdseg1 ends
;-----------------------------------------------------
vcseg segment use16
assume cs:vcseg
vstart: mov ax,vdata_sel
mov ds,ax
mov ax,vbuf_sel
mov es,ax
lea si,yang
xor bx,bx
mov cx,14
again: mov al,[si]
mov ah,07h
mov es:[bx],ax
add bx,2
inc si
loop again
;hello
mov ax,vdata1_sel
mov ds,ax
lea si,hello
mov cx,hellolen
again1: mov al,[si]
mov ah,0F4h
mov es:[bx],ax
add bx,2
inc si
loop again1
gojump: jump <code_sel>,<offset toreal>
vcseg ends
;-----------------------------------------------------
codekseg segment use16
assume cs:codekseg
startk: mov ax,ldt_sel
lldt ax
jump <vcode_sel>,<offset vstart>
codekseg ends
;-----------------------------------------------------
cseg segment use16
assume cs:cseg
start: mov ax,gdtseg
mov ds,ax
mov bx,16
mul bx
add ax,offset gdt
adc dx,0
mov word ptr vgtdr.base,ax
mov word ptr vgtdr.base+2,dx
;
mov ax,cseg
mul bx
mov word ptr code.basel,ax
mov byte ptr code.basem,dl
mov byte ptr code.baseh,dh
;
mov ax,codekseg
mul bx
mov word ptr codek.basel,ax
mov byte ptr codek.basem,dl
mov byte ptr codek.baseh,dh
;
push ds
mov ax,ldtseg
mov ds,ax
mul bx
mov word ptr ldtable.basel,ax
mov byte ptr ldtable.basem,dl
mov byte ptr ldtable.baseh,dh
;
mov ax,vcseg
mul bx
mov word ptr vcode.basel,ax
mov byte ptr vcode.basem,dl
mov byte ptr vcode.baseh,dh
;
mov ax,vdseg
mul bx
mov word ptr vdata.basel,ax
mov byte ptr vdata.basem,dl
mov byte ptr vdata.baseh,dh
;
mov ax,vdseg1
mul bx
mov word ptr vdata1.basel,ax
mov byte ptr vdata1.basem,dl
mov byte ptr vdata1.baseh,dh
pop ds
;
lgdt qword ptr vgtdr
cli
ea20 //
mov eax,cr0 //
or eax,1 //
mov cr0,eax //
jump <codek_sel>,<offset startk> // proctect mode
toreal: mov ax,normal_sel
mov ds,ax
mov eax,cr0
and eax,0FFFFFFFEH
mov cr0,eax
jump <seg real>,<offset real>
real: da20
sti
mov ah,4ch
int 21h
cseg ends
end start
;-------------------------------------------------------------------------------
编译时候,好多符号没有定义呀.可是我在数据段已经定义了呀.
对于保护模式下的程序,我真的不知道怎么调试呀.
问题点数：100、回复次数：11Top
1 楼csdsjkk（）回复于 2004-04-04 19:28:29 得分 100
;--------------------------------------------------------
ea20 macro ; //打开A20地址线
push ax
in al,92h
or al,00000010b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
;关闭A20地址线
;----------------------------------------------------------------------------
da20 macro
push ax
in al,92h
and al,11111101b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
jump macro selector,offsetv ; //跳转宏
db 0EAh
dw offsetv
dw selector
endm
;--------------------
descriptor struc ; //描述符的结构
limitl dw 0
basel dw 0
basem db 0
attributes dw 0
baseh db 0
descriptor ends
;--------------------
pdesc struc ; //伪描述府
limit dw 0
base dd 0
pdesc ends
;
atdw=92h
atce=98h
atcer=9ah
atldt=82h
TIL=4
.386P
;---------------------------------------------------------------------------------------
gdtseg segment use16
gdt label byte
dummy descriptor <>
code descriptor <0FFFFh,,,atce,>
code_sel=code-gdt
;代码段codekseg的描述符
codek descriptor <0FFFFh,,,atce,>
codek_sel=codek-gdt
;通用描述符
normal descriptor <0FFFFh,,,atdw,>
normal_sel=normal-gdt
;局部描述表的描述符
ldtable descriptor <0FFFFh,,,atldt,>
ldt_sel=ldtable-gdt
gdtlen=$-gdt
vgdtr pdesc <gdtlen-1,>
gdtseg ends
;------------------------------------------------------------------
;局部描述表
ldtseg segment use16
ldt label byte
;数据段ldtseg的描述符
data descriptor <0FFFFh,,,atdw,>
data_sel=(data-ldt)+TIL
;代码段vcode的描述符
vcode descriptor <0FFFFh,,,atce,>
vcode_sel=(vcode-ldt)+TIL
;要显示的数据
vdata descriptor <0FFFFh,,,atdw,>
vdata_sel=(vdata-ldt)+TIL
;要显示的数据2
vdata1 descriptor <0FFFFh,,,atdw,>
vdata1_sel=(vdata1-ldt)+TIL
;
vbuf descriptor <0FFFFh,8000h,0bh,atdw,>
vbuf_sel=(vbuf-ldt)+TIL
ldtseg ends
;-----------------------------------------------------
;代码段
vdseg segment use16
yang db 'how are you',0
vdseg ends
;-----------------------------------------------------
vdseg1 segment use16
hello db 'hello',0
hellolen=$-hello
vdseg1 ends
;-----------------------------------------------------
vcseg segment use16
assume cs:vcseg
vstart: mov ax,vdata_sel
mov ds,ax
mov ax,vbuf_sel
mov es,ax
lea si,yang
xor bx,bx
mov cx,11 ;14
again: mov al,[si]
mov ah,07h
mov es:[bx],ax
add bx,2
inc si
loop again
;hello
mov ax,vdata1_sel
mov ds,ax
lea si,hello
mov cx,hellolen
again1: mov al,[si]
mov ah,0F4h
mov es:[bx],ax
add bx,2
inc si
loop again1
gojump: jump <code_sel>,<offset toreal>
vcseg ends
;-----------------------------------------------------
codekseg segment use16
assume cs:codekseg
startk: mov ax,ldt_sel
lldt ax
jump <vcode_sel>,<offset vstart>
codekseg ends
;-----------------------------------------------------
cseg segment use16
assume cs:cseg,ds:gdtseg
start: mov ax,gdtseg
mov ds,ax
mov bx,16
mul bx
add ax,offset gdt
adc dx,0
mov word ptr vgdtr.base,ax
mov word ptr vgdtr.base+2,dx
;
mov ax,cseg
mul bx
mov word ptr code.basel,ax
mov byte ptr code.basem,dl
mov byte ptr code.baseh,dh
;
mov ax,codekseg
mul bx
mov word ptr codek.basel,ax
mov byte ptr codek.basem,dl
mov byte ptr codek.baseh,dh
;
mov ax,ldtseg
mul bx
mov word ptr ldtable.basel,ax
mov byte ptr ldtable.basem,dl
mov byte ptr ldtable.baseh,dh
;
push ds
mov ax,ldtseg
mov ds,ax
assume ds:ldtseg
mov ax,vcseg
mul bx
mov word ptr vcode.basel,ax
mov byte ptr vcode.basem,dl
mov byte ptr vcode.baseh,dh
;
mov ax,vdseg
mul bx
mov word ptr vdata.basel,ax
mov byte ptr vdata.basem,dl
mov byte ptr vdata.baseh,dh
;
mov ax,vdseg1
mul bx
mov word ptr vdata1.basel,ax
mov byte ptr vdata1.basem,dl
mov byte ptr vdata1.baseh,dh
pop ds
;
assume ds:gdtseg
lgdt fword ptr vgdtr
cli
ea20 ; //
mov eax,cr0 ; //
or eax,1 ; //
mov cr0,eax ; //
jump <codek_sel>,<offset startk> ; // proctect mode
toreal: mov ax,normal_sel
mov ds,ax
mov eax,cr0
and eax,0FFFFFFFEH
mov cr0,eax
jump <seg real>,<offset real>
real: da20
sti
mov ah,4ch
int 21h
cseg ends
end start
Top
2 楼Areslee（懒虫易水）回复于 2004-04-04 19:35:19 得分 0
用TASM编译
如果用MASM 6.XX编译需要加上/Zm开关Top
3 楼ywchen2000（灌水大帝:努力奋斗）回复于 2004-04-04 19:41:22 得分 0
to csdsjkk():
请问你改了那个地方,我的代码写的........Top
4 楼xinhongfengye（红枫叶）回复于 2004-04-04 19:47:26 得分 0
;--------------------------------------------------------
ea20 macro ; //打开A20地址线
push ax
in al,92h
or al,00000010b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
;关闭A20地址线
;----------------------------------------------------------------------------
da20 macro
push ax
in al,92h
and al,11111101b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
jump macro selector,offsetv ; //跳转宏
db 0EAh
dw offsetv
dw selector
endm
;--------------------
descriptor struc ; //描述符的结构
limitl dw 0
basel dw 0
basem db 0
attributes dw 0
baseh db 0
descriptor ends
;--------------------
pdesc struc ; //伪描述府
limit dw 0
base dd 0
pdesc ends
;
atdw=92h
atce=98h
atcer=9ah
atldt=82h
TIL=4
.386P
;---------------------------------------------------------------------------------------
gdtseg segment use16
gdt label byte
dummy descriptor <>
code descriptor <0FFFFh,,,atce,>
code_sel=code-gdt
;代码段codekseg的描述符
codek descriptor <0FFFFh,,,atce,>
codek_sel=codek-gdt
;通用描述符
normal descriptor <0FFFFh,,,atdw,>
normal_sel=normal-gdt
;局部描述表的描述符
ldtable descriptor <0FFFFh,,,atldt,>
ldt_sel=ldtable-gdt
gdtlen=$-gdt
vgdtr pdesc <gdtlen-1,>
gdtseg ends
;------------------------------------------------------------------
;局部描述表
ldtseg segment use16
ldt label byte
;数据段ldtseg的描述符
data descriptor <0FFFFh,,,atdw,>
data_sel=(data-ldt)+TIL
;代码段vcode的描述符
vcode descriptor <0FFFFh,,,atce,>
vcode_sel=(vcode-ldt)+TIL
;要显示的数据
vdata descriptor <0FFFFh,,,atdw,>
vdata_sel=(vdata-ldt)+TIL
;要显示的数据2
vdata1 descriptor <0FFFFh,,,atdw,>
vdata1_sel=(vdata1-ldt)+TIL
;
vbuf descriptor <0FFFFh,8000h,0bh,atdw,>
vbuf_sel=(vbuf-ldt)+TIL
ldtseg ends
;-----------------------------------------------------
;代码段
vdseg segment use16
yang db 'how are you',0
vdseg ends
;-----------------------------------------------------
vdseg1 segment use16
hello db 'hello',0
hellolen=$-hello
vdseg1 ends
;-----------------------------------------------------
vcseg segment use16
assume cs:vcseg
vstart: mov ax,vdata_sel
mov ds,ax
mov ax,vbuf_sel
mov es,ax
lea si,yang
xor bx,bx
mov cx,11 ;14
again: mov al,[si]
mov ah,07h
mov es:[bx],ax
add bx,2
inc si
loop again
;hello
mov ax,vdata1_sel
mov ds,ax
lea si,hello
mov cx,hellolen
again1: mov al,[si]
mov ah,0F4h
mov es:[bx],ax
add bx,2
inc si
loop again1
gojump: jump <code_sel>,<offset toreal>
vcseg ends
;-----------------------------------------------------
codekseg segment use16
assume cs:codekseg
startk: mov ax,ldt_sel
lldt ax
jump <vcode_sel>,<offset vstart>
codekseg ends
;-----------------------------------------------------
cseg segment use16
assume cs:cseg,ds:gdtseg
start: mov ax,gdtseg
mov ds,ax
mov bx,16
mul bx
add ax,offset gdt
adc dx,0
mov word ptr vgdtr.base,ax
mov word ptr vgdtr.base+2,dx
;
mov ax,cseg
mul bx
mov word ptr code.basel,ax
mov byte ptr code.basem,dl
mov byte ptr code.baseh,dh
;
mov ax,codekseg
mul bx
mov word ptr codek.basel,ax
mov byte ptr codek.basem,dl
mov byte ptr codek.baseh,dh
;
mov ax,ldtseg
mul bx
mov word ptr ldtable.basel,ax
mov byte ptr ldtable.basem,dl
mov byte ptr ldtable.baseh,dh
;
push ds
mov ax,ldtseg
mov ds,ax
assume ds:ldtseg
mov ax,vcseg
mul bx
mov word ptr vcode.basel,ax
mov byte ptr vcode.basem,dl
mov byte ptr vcode.baseh,dh
;
mov ax,vdseg
mul bx
mov word ptr vdata.basel,ax
mov byte ptr vdata.basem,dl
mov byte ptr vdata.baseh,dh
;
mov ax,vdseg1
mul bx
mov word ptr vdata1.basel,ax
mov byte ptr vdata1.basem,dl
mov byte ptr vdata1.baseh,dh
pop ds
;
assume ds:gdtseg
lgdt fword ptr vgdtr
cli
ea20 ; //
mov eax,cr0 ; //
or eax,1 ; //
mov cr0,eax ; //
jump <codek_sel>,<offset startk> ; // proctect mode
toreal: mov ax,normal_sel
mov ds,ax
mov eax,cr0
and eax,0FFFFFFFEH
mov cr0,eax
jump <seg real>,<offset real>
real: da20
sti
mov ah,4ch
int 21h
cseg ends
end startTop
5 楼ywchen2000（灌水大帝:努力奋斗）回复于 2004-04-04 20:26:47 得分 0
TIL=1
为什么要吧TIL改位四呢,TIL=1说明他是从局部描述表中取得描述符呀Top
6 楼csdsjkk（）回复于 2004-04-04 20:38:11 得分 0
段选择符格式:
15..3 2 1 0
index TI RPL
Top
7 楼ywchen2000（灌水大帝:努力奋斗）回复于 2004-04-04 20:51:05 得分 0
还是这段代码,我编译通过了,但是运行起来,系统就重启呀.@_@
;--------------------------------------------------------
ea20 macro ;打开A20地址线
push ax
in al,92h
or al,00000010b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
;关闭A20地址线
;----------------------------------------------------------------------------
da20 macro
push ax
in al,92h
and al,11111101b
out 92h,al
pop ax
endm
;----------------------------------------------------------------------------
jump macro selector,offsetv ;跳转宏
db 0EAh
dw offsetv
dw selector
endm
;--------------------
descriptor struc ;描述符的结构
limitl dw 0
basel dw 0
basem db 0
attributes dw 0
baseh db 0
descriptor ends
;--------------------
pdesc struc ;伪描述府
limit dw 0
base dd 0
pdesc ends
;
atdw=92h
atce=98h
atcer=9ah
atldt=82h
TIL=4
.386P
;---------------------------------------------------------------------------------------
gdtseg segment use16
gdt label byte
dummy descriptor <>
code descriptor <0FFFFh,,,atce,>
code_sel=code-gdt
;代码段codekseg的描述符
codek descriptor <0FFFFh,,,atdw,>
codek_sel=codek-gdt
;通用描述符
normal descriptor <0FFFFh,,,atdw,>
normal_sel=normal-gdt
;局部描述表的描述符
ldtable descriptor <0FFFFh,,,atldt,>
ldt_sel=ldtable-gdt
gdtlen=$-gdt
vgdtr pdesc <gdtlen-1,>
gdtseg ends
;------------------------------------------------------------------
;局部描述表
ldtseg segment use16
ldt label byte
;数据段ldtseg的描述符
data descriptor <0FFFFh,,,atdw,>
data_sel=(data-ldt)+TIL
;代码段vcode的描述符
vcode descriptor <0FFFFh,,,atce,>
vcode_sel=(vcode-ldt)+TIL
;要显示的数据
vdata descriptor <0FFFFh,,,atdw,>
vdata_sel=(vdata-ldt)+TIL
;要显示的数据2
vdata1 descriptor <0FFFFh,,,atdw,>
vdata1_sel=(vdata1-ldt)+TIL
;
vbuf descriptor <0FFFFh,8000,0b,atdw,>
vbuf_sel=(vbuf-ldt)+TIL
ldtseg ends
;-----------------------------------------------------
;代码段
vdseg segment use16
yang db 'how are you',0
vdseg ends
;-----------------------------------------------------
vdseg1 segment use16
hello db 'hello',0
hellolen=$-hello
vdseg1 ends
;-----------------------------------------------------
vcseg segment use16
assume cs:vcseg
vstart: mov ax,vdata_sel
mov ds,ax
mov ax,vbuf_sel
mov es,ax
lea si,yang
xor bx,bx
mov cx,11
again: mov al,[si]
mov ah,07h
mov es:[bx],ax
add bx,2
inc si
loop again
;hello
mov ax,vdata1_sel
mov ds,ax
lea si,hello
mov cx,hellolen
again1: mov al,[si]
mov ah,0F4h
mov es:[bx],ax
add bx,2
inc si
loop again1
gojump: jump <code_sel>,<offset toreal>
vcseg ends
;-----------------------------------------------------
codekseg segment use16
assume cs:codekseg
startk: mov ax,ldt_sel
lldt ax
jump <vcode_sel>,<offset vstart>
codekseg ends
;-----------------------------------------------------
cseg segment use16
assume cs:cseg,ds:gdtseg
start: mov ax,gdtseg
mov ds,ax
mov bx,16
mul bx
add ax,offset gdt
adc dx,0
mov word ptr vgdtr.base,ax
mov word ptr vgdtr.base+2,dx
;
mov ax,cseg
mul bx
mov word ptr code.basel,ax
mov byte ptr code.basem,dl
mov byte ptr code.baseh,dh
;
mov ax,codekseg
mul bx
mov word ptr codek.basel,ax
mov byte ptr codek.basem,dl
mov byte ptr codek.baseh,dh
;
mov ax,ldtseg
mul bx
mov word ptr ldtable.basel,ax
mov byte ptr ldtable.basem,dl
mov byte ptr ldtable.baseh,dh
;
push ds
mov ax,ldtseg
mov ds,ax
assume ds:ldtseg
mov ax,vcseg
mul bx
mov word ptr vcode.basel,ax
mov byte ptr vcode.basem,dl
mov byte ptr vcode.baseh,dh
;
mov ax,vdseg
mul bx
mov word ptr vdata.basel,ax
mov byte ptr vdata.basem,dl
mov byte ptr vdata.baseh,dh
;
mov ax,vdseg1
mul bx
mov word ptr vdata1.basel,ax
mov byte ptr vdata1.basem,dl
mov byte ptr vdata1.baseh,dh
pop ds
;
assume ds:gdtseg
lgdt fword ptr vgdtr
cli
ea20
mov eax,cr0
or eax,1
mov cr0,eax
jump <codek_sel>,<offset startk>
toreal: mov ax,normal_sel
mov ds,ax
mov eax,cr0
and eax,0FFFFFFFEH
mov cr0,eax
jump <seg real>,<offset real>
real: da20
sti
mov ah,4ch
int 21h
cseg ends
end start
Top
8 楼csdsjkk（）回复于 2004-04-04 21:01:34 得分 0
我改的没问题呀Top
9 楼ywchen2000（灌水大帝:努力奋斗）回复于 2004-04-04 21:05:24 得分 0
你的那段代码可以运行,可能你改了一个地方我没有发现呀Top
10 楼csdsjkk（）回复于 2004-04-04 21:11:35 得分 0
codek descriptor <0FFFFh,,,atdw,>
改为：
codek descriptor <0FFFFh,,,atce,>
Top
11 楼ywchen2000（灌水大帝:努力奋斗）回复于 2004-04-04 21:16:34 得分 0
呵呵,谢谢Top
