* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA.
*/
-
#include <asm.inc>
#include <arch/pc/x86common.h>
PUBLIC _DriveMapInt13HandlerStart
_DriveMapInt13HandlerStart:
-Int13Handler:
- push bp
- mov bp, sp
- push ax
- push cx
- push si
+Int13Handler:
+ push bp
+ mov bp, sp
+ push ax
+ push cx
+ push si
- cld
+ cld
- /* Get callers flags from stack */
- mov ax, [bp + 6]
- mov word ptr cs:[CallersFlags - Int13Handler], ax
+ /* Get callers flags from stack */
+ mov ax, [bp + 6]
+ mov word ptr cs:[CallersFlags - Int13Handler], ax
- /* Save the drive number they passed in */
- mov cs:[PassedInDriveNumber - Int13Handler], dl
+ /* Save the drive number they passed in */
+ mov byte ptr cs:[PassedInDriveNumber - Int13Handler], dl
- /* Now we need to perform the mapping */
- xor cx, cx
- mov si, offset Int13HandlerMapCount - Int13Handler
+ /* Now we need to perform the mapping */
+ xor cx, cx
+ mov si, offset Int13HandlerMapCount - Int13Handler
- /* Get the count of drives in the map list */
- mov cl, cs:[si]
- inc si
+ /* Get the count of drives in the map list */
+ mov cl, byte ptr cs:[si]
+ inc si
- /* If the map list is empty then just call the old int 13h handler */
- cmp cl, 0
- jz CallOldInt13Handler
+ /* If the map list is empty then just call the old int 13h handler */
+ cmp cl, 0
+ jz CallOldInt13Handler
GetMappedDriveNumberLoop:
- /* Get the next drive number in the list */
- lods ax, cs:[si]
+ /* Get the next drive number in the list (store it in AX) */
+ lods word ptr cs:[si]
- /* Check to see if it's the one they are calling int 13h for */
- cmp dl, al
+ /* Check to see if it's the one they are calling int 13h for */
+ cmp dl, al
- /* If not get the next one */
- jne GetMappedDriveNumberLoopNext
+ /* If not get the next one */
+ jne GetMappedDriveNumberLoopNext
- /* If we get here then we have found a mapped drive */
- /* Send new drive number on to the old int 13h handler */
- mov dl, ah
+ /* If we get here then we have found a mapped drive */
+ /* Send new drive number on to the old int 13h handler */
+ mov dl, ah
- /* Call BIOS Int 13 Handler */
- jmp CallOldInt13Handler
+ /* Call BIOS Int 13 Handler */
+ jmp CallOldInt13Handler
GetMappedDriveNumberLoopNext:
- loop GetMappedDriveNumberLoop
+ loop GetMappedDriveNumberLoop
CallOldInt13Handler:
- /* Restore the registers we changed off the stack */
- pop si
- pop cx
- pop ax
+ /* Restore the registers we changed off the stack */
+ pop si
+ pop cx
+ pop ax
- /* Put flags onto stack */
- push word ptr cs:[CallersFlags - Int13Handler]
+ /* Put flags onto stack */
+ push word ptr cs:[CallersFlags - Int13Handler]
-
- /* Call old int 13h handler with new drive number */
- .byte HEX(9a) /* lcall */
+ /* Call old int 13h handler with new drive number */
+ .byte HEX(9a) /* lcall */
PUBLIC _DriveMapOldInt13HandlerAddress
_DriveMapOldInt13HandlerAddress:
- .word 0
- .word 0
+ .word 0
+ .word 0
- /* Update the callers flags with the values the BIOS returned */
- push ax
- pushf
- pop ax
- mov [bp + 6], ax
- pop ax
+ /* Update the callers flags with the values the BIOS returned */
+ push ax
+ pushf
+ pop ax
+ mov [bp + 6], ax
+ pop ax
- /* Restore the callers drive number */
- mov dl, cs:[PassedInDriveNumber - Int13Handler]
+ /* Restore the callers drive number */
+ mov dl, byte ptr cs:[PassedInDriveNumber - Int13Handler]
- pop bp
+ pop bp
- iret
+ iret
CallersFlags:
- .word 0
+ .word 0
PassedInDriveNumber:
- .byte 0
+ .byte 0
+/* See the DRIVE_MAP_LIST structure in include/arch/i386/drivemap.h */
PUBLIC _DriveMapInt13HandlerMapList
_DriveMapInt13HandlerMapList:
Int13HandlerMapCount:
- .byte 0
+ .byte 0
Int13HandlerDrive1:
- .byte 0
+ .byte 0
Int13HandlerDriveNew1:
- .byte 0
+ .byte 0
Int13HandlerDrive2:
- .byte 0
+ .byte 0
Int13HandlerDriveNew2:
- .byte 0
+ .byte 0
Int13HandlerDrive3:
- .byte 0
+ .byte 0
Int13HandlerDriveNew3:
- .byte 0
+ .byte 0
Int13HandlerDrive4:
- .byte 0
+ .byte 0
Int13HandlerDriveNew4:
- .byte 0
+ .byte 0
PUBLIC _DriveMapInt13HandlerEnd
_DriveMapInt13HandlerEnd:
+
+.endcode16
+
+END
projects / reactos.git / blobdiff