windows-nt/Source/XPSP1/NT/base/mvdm/wow16/user/winstack.asm

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;++
;
; WOW v1.0
;
; Copyright (c) 1991, Microsoft Corporation
;
; WINSTACK.ASM
; Win16 stack munging routines
;
; History:
;
; Created 18-Jun-1991 by Jeff Parsons (jeffpar)
; Copied from WIN31 and edited (as little as possible) for WOW16
;--
;****************************************************************************
;* *
;* WINSTACK.ASM - *
;* *
;* Stack Frame setup routines *
;* *
;****************************************************************************
ifdef WOW
NOEXTERNS equ 1
endif
.xlist
include user.inc
.list
;
; Short jump macro
;
jmps macro adr
jmp short (adr)
endm
;
; XMOV macro
;
; Use instead of MOV ax,reg. Saves a byte.
;
xmov macro a,b
xchg a,b
endm
ifdef WOWDEBUG
sBegin DATA
externW <pStackTop>
externW <pStackMin>
externW <pStackBot>
sEnd
ifdef DEBUG
sBegin TEXT
ExternFP <DivideByZero>
sEnd
endif
endif ;WOWDEBUG
createSeg _TEXT, TEXT, WORD, PUBLIC, CODE
assumes CS,TEXT
assumes SS,DATA
sBegin TEXT
org 0 ; MUST be at the start of each segment
; so that WinFarFrame can jump back
; to the proper location.
;*--------------------------------------------------------------------------*
;* *
;* _TEXT_NEARFRAME() - *
;* *
;*--------------------------------------------------------------------------*
; Call to _segname_NEARFRAME should be in following format:
;
; call _segname_NEARFRAME
; db cbLocals (count of local words to be allocated)
; db cbParams (count of argument words)
LabelNP <PUBLIC, _TEXT_NEARFRAME>
push cs ; Save the current segment
jmps WinNearFrame ; Jump to the (only) NEARFRAME routine
nop
nop
nop
nf2: push cs ; Save the CS (it may have changed!)
jmps WinNearFrame2 ; Jump to the second half of NEARFRAME
nop
nop
nop
;*--------------------------------------------------------------------------*
;* *
;* _TEXT_FARFRAME() - *
;* *
;*--------------------------------------------------------------------------*
; Call to _segname_FARFRAME should be in following format:
;
; call _segname_FARFRAME
; db cbLocals (count of local words to be allocated)
; db cbParams (count of argument words)
LabelNP <PUBLIC, _TEXT_FARFRAME>
push cs ; Save the current segment
jmps WinFarFrame ; Jump to the (only) FARFRAME routine
nop
nop
nop
ifdef WOWDEBUG
ff2: jmp near ptr WinFarFrame2 ; Jump to the second half of FARFRAME
else
ff2: jmp short near ptr WinFarFrame2
endif
ifdef WOWDEBUG
;*--------------------------------------------------------------------------*
;* *
;* __astkovr1() - *
;* *
;*--------------------------------------------------------------------------*
; Stack Overflow checking routine
;externFP <__astkovr>
;__astkovr1: jmp __astkovr
endif
;*--------------------------------------------------------------------------*
;* *
;* WinNearFrame() - *
;* *
;*--------------------------------------------------------------------------*
; Sets up and dismantles the frame for a NEAR routine. This routine
; is FAR JMPed to by _segname_NEARFRAME. It munges the stack so that a
; NEAR RET returns to a JMP to WinNearFrame2 which dismantles the frame.
;
; CX must be is preserved in the first portion.
LabelFP <PUBLIC, WinNearFrame>
pop es ; Get the caller's Code Segment
pop bx ; Get pointer to sizes of args and locals
push bp ; Update the BP chain
mov bp,sp
mov dx,word ptr es:[bx] ; Move the 2 parms in DX
xor ax,ax
mov al,dl ; Move the # of local words into AL
shl ax,1 ; Convert # of words into # of bytes
ifdef WOWDEBUG
sub ax,sp
; jae __astkovr1 ; Check for stack overflow in
neg ax ; debugging versions
cmp ss:[pStackTop],ax
; ja __astkovr1
cmp ss:[pStackMin],ax
jbe nf100
mov ss:[pStackMin],ax
nf100: xmov sp,ax
else
sub sp,ax ; Reserve room for locals on stack
endif
push si ; Save SI and DI
push di
xor ax,ax
mov al,dh ; Move the # of func args into AL
shl ax,1 ; Convert words to bytes
push ax ; Save on the stack
mov ax,offset nf2 ; Push the offset of the JMP to
push ax ; WinNearFrame2 for function's RET
inc bx ; Move pointer past the parms to the
inc bx ; actual function code
push es ; Jump back to the function via RETF
push bx
xor bx,bx ; insure ES is 0
mov es,bx
retf
LabelFP <PUBLIC,WinNearFrame2>
; NOTE: AX and DX must be preserved now since they contain the C
; return value.
pop es ; Get the caller's CS
pop cx ; Get # of func args in CX
pop di ; Restore SI and DI
pop si
mov sp,bp ; Free the local variables
pop bp ; Restore BP
pop bx ; Get the caller's return address
add sp,cx ; Remove paramters from stack
push es ; Return to caller via RETF
push bx
xor bx,bx ; insure ES is 0
mov es,bx
retf
;*--------------------------------------------------------------------------*
;* *
;* WinFarFrame() - *
;* *
;*--------------------------------------------------------------------------*
; Sets up and dismantles the frame for a FAR routine. This routine
; is FAR JMPed to by _segname_NEARFRAME. It munges the stack so that a
; NEAR RET returns to a JMP to WinFarFrame2 which dismantles the frame.
;
; CX must be is preserved in the first portion.
LabelFP <PUBLIC, WinFarFrame>
mov ax,ds ; This is patched by the loader to become
nop ; mov ax,DSVAL
pop es ; Get the caller's CS
pop bx ; Get pointer to sizes of args and locals
inc bp ; Make BP odd to mark far frame
push bp ; Update the BP chain
mov bp,sp
push ds ; Save DS
mov dx,word ptr es:[bx] ; Move the 2 parms into DX
mov ds,ax ; Get the new DS from the loader patch
xor ax,ax
mov al,dl ; Move the # of local words into AL
shl ax,1 ; Convert # of words into # of bytes
ifdef WOWDEBUG
sub ax,sp
; jae __astkovr1 ; Check for stack overflow in
neg ax ; debugging versions
cmp ss:[pStackTop],ax
; ja __astkovr1
cmp ss:[pStackMin],ax
jbe ff100
mov ss:[pStackMin],ax
ff100: xmov sp,ax
else
sub sp,ax ; Reserve room for locals on stack
endif
push si ; Save SI and DI
push di
xor ax,ax
mov al,dh ; Move the # of func args into AL
shl ax,1 ; Convert words to bytes
push ax ; Save on the stack
mov ax,offset ff2 ; Push the offset of the JMP to
push ax ; WinFarFrame2 for function's RET
inc bx ; Move pointer past the parms to the
inc bx ; actual function code
push es ; Jump back to the function via RETF
push bx
xor bx,bx ; Ensure es is 0
mov es,bx
retf
LabelFP <PUBLIC,WinFarFrame2>
; NOTE: AX and DX must be preserved now since they contain the C
; return value.
pop cx ; Get # of func args in CX
pop di ; Restore SI and DI
pop si
if 0
sub bp,2 ; Point BP at the DS value
mov sp,bp ; Free the local variables
pop ds ; Restore DS
pop bp ; Restore BP
dec bp ; Make BP even again
pop bx ; Get the caller's return address
pop es
add sp,cx ; Remove paramters from stack
push es ; Return to caller via RETF
push bx
xor bx,bx ; Ensure es is 0
mov es,bx
endif
mov ds,[bp-2] ; Restore DS
lea bx,[bp+2] ; get caller's return address
add bx,cx ; Where we want to put the old CS:IP
mov cx,[bp+4] ; get old CS
mov ss:[bx+2],cx ; move it up
mov cx,[bp+2] ; Get old IP
mov ss:[bx],cx ; move it up
mov bp,[bp] ; restore the old BP
dec bp ; make it even again
mov sp,bx ; point to the moved CS:IP
retf ; later dude
ifdef WOWDEBUG
ORG 0cch
jmp far ptr DivideByZero
endif
sEnd TEXT
ifndef WOW
;==============================================================================
; FFFE SEGMENT
;==============================================================================
createSeg _FFFE, FFFE, BYTE, PUBLIC, CODE
assumes CS,_FFFE
assumes SS,DATA
sBegin FFFE
ORG 0 ; This segment must have a magic header
; so that we know to move it up into
; segment FFFE:0000 if possible
; db 16 DUP ("AC")
; db 16 DUP (0) ; Tony's sleazy zeros
ifdef WOWDEBUG
;*--------------------------------------------------------------------------*
;* *
;* __ffastkovr1() - *
;* *
;*--------------------------------------------------------------------------*
; Stack Overflow checking routine
;__ffastkovr1: jmp __astkovr
endif
;*--------------------------------------------------------------------------*
;* *
;* _FFFE_NEARFRAME() - *
;* *
;*--------------------------------------------------------------------------*
LabelNP <PUBLIC, _FFFE_NEARFRAME>
pop bx ; Get pointer to sizes of args and locals
push bp ; Update the BP chain
mov bp,sp
mov dx,word ptr cs:[bx] ; Move the 2 parms in DX
xor ax,ax
mov al,dl ; Move the # of local words into AL
shl ax,1 ; Convert # of words into # of bytes
ifdef WOWDEBUG
sub ax,sp
; jae __ffastkovr1 ; Check for stack overflow in
neg ax ; debugging versions
cmp ss:[pStackTop],ax
; ja __ffastkovr1
cmp ss:[pStackMin],ax
jbe ffnf100
mov ss:[pStackMin],ax
ffnf100: xmov sp,ax
else
sub sp,ax ; Reserve room for locals on stack
endif
push si ; Save SI and DI
push di
xor ax,ax
mov al,dh ; Move the # of func args into AL
shl ax,1 ; Convert words to bytes
push ax ; Save on the stack
ifndef userhimem
mov ax,offset FFFE_nf2 ; Munge the stack so the function
else
push ds
mov ax, _INTDS
mov ds,ax
assumes ds,INTDS
mov ax,fffedelta
pop ds
assumes ds,DATA
add ax, OFFSET FFFE_nf2
endif
push ax ; "returns" to FFFE_nf2
inc bx ; Move pointer past the parms to the
inc bx ; actual function code
push bx ; Jump back to the function
ret
LabelFP <PUBLIC,FFFE_nf2>
; NOTE: AX and DX must be preserved now since they contain the C
; return value
pop cx ; Get # of func args in CX
pop di ; Restore SI and DI
pop si
mov sp,bp ; Free the local variables
pop bp ; Restore BP
pop bx ; Get the caller's return address
add sp,cx ; Remove paramters from stack
push bx ; Return to caller
ret
;*--------------------------------------------------------------------------*
;* *
;* _FFFE_FARFRAME() - *
;* *
;*--------------------------------------------------------------------------*
LabelNP <PUBLIC, _FFFE_FARFRAME>
mov ax,ds ; This is patched by the loader to become
nop ; mov ax,DSVAL
pop bx ; Get pointer to sizes of args and locals
inc bp ; Make BP odd to mark far frame
push bp ; Update the BP chain
mov bp,sp
push ds ; Save DS
mov ds,ax ; Get the new DS from the loader patch
mov dx,word ptr cs:[bx] ; Move the 2 parms into DX
xor ax,ax
mov al,dl ; Move the # of local words into AL
shl ax,1 ; Convert # of words into # of bytes
ifdef WOWDEBUG
sub ax,sp
; jae __ffastkovr1 ; Check for stack overflow in
neg ax ; debugging versions
cmp ss:[pStackTop],ax
; ja __ffastkovr1
cmp ss:[pStackMin],ax
jbe ffff100
mov ss:[pStackMin],ax
ffff100: xmov sp,ax
else
sub sp,ax ; Reserve room for locals on stack
endif
push si ; Save SI and DI
push di
xor ax,ax
mov al,dh ; Move the # of func args into AL
shl ax,1 ; Convert words to bytes
push ax ; Save on the stack
ifndef userhimem
mov ax,offset FFFE_ff2 ; Munge the stack so the function
else
push ds
mov ax, _INTDS
mov ds,ax
assumes ds,INTDS
mov ax,fffedelta
pop ds
assumes ds,DATA
add ax,offset FFFE_ff2 ; Munge the stack so the function
endif
push ax ; "returns" to FFFE_nf2
inc bx ; Move pointer past the parms to the
inc bx ; actual function code
push bx ; Jump back to the function
ret
; NOTE: AX and DX must be preserved now since they contain the C
; return value
LabelFP <PUBLIC,FFFE_ff2>
pop cx ; Get # of func args in CX
pop di ; Restore SI and DI
pop si
sub bp,2 ; Point BP at the DS value
mov sp,bp ; Free the local variables
pop ds ; Restore DS
pop bp ; Restore BP
dec bp ; Make BP even again
pop bx ; Get the caller's return address
pop es
add sp,cx ; Remove paramters from stack
push es ; Return to caller via RETF
push bx
xor bx,bx ; Ensure es is 0
mov es,bx
retf
sEnd FFFE
;*--------------------------------------------------------------------------*
;* *
;* CreateFrame Macro - *
;* *
;*--------------------------------------------------------------------------*
CreateFrame macro SegName
createSeg _&SegName, SegName, BYTE, PUBLIC, CODE
assumes CS,_&SegName
assumes SS,DATA
sBegin SegName
org 0 ; MUST be at the start of each segment
; so that WinFarFrame can jump back
; to the proper location.
LabelNP <PUBLIC, _&SegName&_NEARFRAME>
push cs ; Save the current segment
jmp WinNearFrame ; Jump to the (only) NEARFRAME routine
push cs ; Save the CS (it may have changed!)
jmp WinNearFrame2 ; Jump to the second half of NEARFRAME
LabelNP <PUBLIC, _&SegName&_FARFRAME>
push cs ; Save the current segment
jmp WinFarFrame ; Jump to the (only) FARFRAME routine
jmp WinFarFrame2 ; Jump to the second half of FARFRAME
sEnd SegName
endm
;==============================================================================
; SEGMENT FRAMES
;==============================================================================
;CreateFrame INIT
;CreateFrame MDKEY
;CreateFrame MENUCORE
;CreateFrame MENUAPI
;CreateFrame MENUSTART
;CreateFrame RUNAPP
;CreateFrame DLGBEGIN
;CreateFrame DLGCORE
;CreateFrame SCRLBAR
CreateFrame WMGR
CreateFrame WMGR2
;CreateFrame RARE
;CreateFrame LBOX
;CreateFrame LBOXAPI
;CreateFrame LBOXDIR
;CreateFrame LBOXMULTI
;CreateFrame LBOXRARE
;CreateFrame CLPBRD
;CreateFrame COMDEV
;CreateFrame ICON
;CreateFrame SWITCH
;CreateFrame MSGBOX
;CreateFrame MDIWIN
;CreateFrame MDIMENU
;CreateFrame EDECRARE
;CreateFrame EDSLRARE
;CreateFrame EDMLONCE
;CreateFrame EDMLRARE
;CreateFrame WINCRTDST
;CreateFrame WINUTIL
;CreateFrame RESOURCE
;CreateFrame WALLPAPER
;CreateFrame WINSWP
CreateFrame LANG
endif ;WOW
end