712 lines
15 KiB
NASM
712 lines
15 KiB
NASM
; kern_wasm.asm
|
|
;
|
|
; Open Watcom WASM/MASM-syntax port of the old TASM IDEAL kern.asm.
|
|
; Intended for 16-bit DOS large memory model builds on Linux with Open Watcom v2.
|
|
;
|
|
; Keep kern.asm as the historical TASM source and use this file for the
|
|
; reproducible Open Watcom build.
|
|
|
|
.286
|
|
.model large
|
|
|
|
.data
|
|
enterIPX dd 0
|
|
|
|
.code
|
|
|
|
public _IPXinit
|
|
public _IPXopen_socket
|
|
public _IPXclose_socket
|
|
public _IPXlisten
|
|
public _xmemmove
|
|
public _Net_Call
|
|
public _C32_LoadNios_Probe
|
|
public _C32_GetFunc_Probe
|
|
public _C32_CallVersion_Nios_Probe
|
|
public _C32_MapLock_Probe
|
|
public _Net_Call_VLM_Raw
|
|
|
|
_IPXinit proc far
|
|
push bp
|
|
mov bp, sp
|
|
push ds
|
|
push si
|
|
push di
|
|
|
|
mov ax, 7A00h
|
|
int 2Fh
|
|
cmp al, 0FFh
|
|
jne ipxinit_done
|
|
|
|
mov cx, @data
|
|
mov ds, cx
|
|
mov word ptr enterIPX, di
|
|
mov ax, es
|
|
mov word ptr enterIPX+2, ax
|
|
mov al, 1
|
|
|
|
ipxinit_done:
|
|
mov ah, 0
|
|
|
|
pop di
|
|
pop si
|
|
pop ds
|
|
pop bp
|
|
ret
|
|
_IPXinit endp
|
|
|
|
_xmemmove proc far
|
|
push bp
|
|
mov bp, sp
|
|
|
|
; far procedure stack layout, large model:
|
|
; [bp+0] old bp
|
|
; [bp+2] return offset
|
|
; [bp+4] return segment
|
|
; [bp+6] z offset
|
|
; [bp+8] z segment
|
|
; [bp+10] q offset
|
|
; [bp+12] q segment
|
|
; [bp+14] nmbr
|
|
|
|
cli
|
|
mov cx, [bp+14]
|
|
or cx, cx
|
|
jz xmem_done
|
|
|
|
push ds
|
|
push si
|
|
push di
|
|
pushf
|
|
|
|
lds si, dword ptr [bp+10]
|
|
les di, dword ptr [bp+6]
|
|
cmp di, si
|
|
jl xmem_forward
|
|
|
|
std
|
|
dec cx
|
|
add di, cx
|
|
add si, cx
|
|
inc cx
|
|
jmp xmem_copy
|
|
|
|
xmem_forward:
|
|
cld
|
|
|
|
xmem_copy:
|
|
rep movsb
|
|
|
|
popf
|
|
pop di
|
|
pop si
|
|
pop ds
|
|
|
|
xmem_done:
|
|
pop bp
|
|
sti
|
|
ret
|
|
_xmemmove endp
|
|
|
|
_IPXopen_socket proc far
|
|
push bp
|
|
mov bp, sp
|
|
push ds
|
|
push si
|
|
push di
|
|
|
|
; int IPXopen_socket(UI sock, int live)
|
|
mov ax, [bp+8] ; live
|
|
mov dx, [bp+6] ; sock
|
|
mov bx, @data
|
|
mov ds, bx
|
|
mov bx, 0
|
|
call dword ptr enterIPX
|
|
|
|
cmp al, 0FFh
|
|
jne ipxopen_not_already
|
|
mov ax, -1 ; socket already open
|
|
jmp ipxopen_done
|
|
|
|
ipxopen_not_already:
|
|
cmp al, 0FEh
|
|
jne ipxopen_ok
|
|
mov ax, -2 ; socket table full
|
|
jmp ipxopen_done
|
|
|
|
ipxopen_ok:
|
|
mov ax, dx
|
|
|
|
ipxopen_done:
|
|
pop di
|
|
pop si
|
|
pop ds
|
|
pop bp
|
|
ret
|
|
_IPXopen_socket endp
|
|
|
|
_IPXclose_socket proc far
|
|
push bp
|
|
mov bp, sp
|
|
push ds
|
|
push si
|
|
push di
|
|
|
|
; void IPXclose_socket(UI sock)
|
|
mov dx, [bp+6]
|
|
mov bx, @data
|
|
mov ds, bx
|
|
mov bx, 1
|
|
call dword ptr enterIPX
|
|
|
|
pop di
|
|
pop si
|
|
pop ds
|
|
pop bp
|
|
ret
|
|
_IPXclose_socket endp
|
|
|
|
_IPXlisten proc far
|
|
push bp
|
|
mov bp, sp
|
|
push ds
|
|
push si
|
|
push di
|
|
|
|
; int IPXlisten(ECB *ecb)
|
|
les si, dword ptr [bp+6]
|
|
mov bx, @data
|
|
mov ds, bx
|
|
mov bx, 4
|
|
call dword ptr enterIPX
|
|
|
|
pop di
|
|
pop si
|
|
pop ds
|
|
pop bp
|
|
mov ah, 0
|
|
ret
|
|
_IPXlisten endp
|
|
|
|
_Net_Call proc far
|
|
push bp
|
|
mov bp, sp
|
|
|
|
; int Net_Call(UI func, void *req, void *repl)
|
|
; [bp+6] func
|
|
; [bp+8] req offset
|
|
; [bp+10] req segment
|
|
; [bp+12] repl offset
|
|
; [bp+14] repl segment
|
|
mov ax, [bp+6]
|
|
|
|
push ds
|
|
push si
|
|
push di
|
|
pushf
|
|
|
|
lds si, dword ptr [bp+8]
|
|
les di, dword ptr [bp+12]
|
|
int 21h
|
|
|
|
popf
|
|
pop di
|
|
pop si
|
|
pop ds
|
|
pop bp
|
|
mov ah, 0
|
|
ret
|
|
_Net_Call endp
|
|
|
|
; int Net_Call_VLM_Raw(UI ax, UI bx, UI cx, UI dx,
|
|
; void *req, void *repl,
|
|
; UI p1, UI p2, UI p3)
|
|
;
|
|
; Experimental VLM entry caller.
|
|
; INT 2F AX=7A20 returns ES:BX = VLM entry if AX == 0000.
|
|
;
|
|
; Register setup for VLM entry:
|
|
; AX, BX, CX, DX from function args
|
|
; DS:SI = req
|
|
; ES:DI = repl
|
|
;
|
|
; Extra stack args pushed before calling VLM entry:
|
|
; p3, p2, p1
|
|
;
|
|
; For NWCREQUEST/VLM test:
|
|
; AX=function
|
|
; BX=numReqFrags
|
|
; CX=connid
|
|
; DX=numReplyFrags
|
|
; DS:SI=reqFragList
|
|
; ES:DI=replyFragList
|
|
; p1=6, p2=20h, p3=0
|
|
_Net_Call_VLM_Raw proc far
|
|
push bp
|
|
mov bp, sp
|
|
sub sp, 4
|
|
|
|
push ds
|
|
push si
|
|
push di
|
|
push es
|
|
|
|
mov ax, 7A20h
|
|
xor bx, bx
|
|
int 2Fh
|
|
or ax, ax
|
|
jz vlm_raw_found
|
|
|
|
mov ax, 88FFh
|
|
jmp short vlm_raw_done
|
|
|
|
vlm_raw_found:
|
|
; save VLM entry ES:BX in stack locals
|
|
mov [bp-4], bx
|
|
mov ax, es
|
|
mov [bp-2], ax
|
|
|
|
; load caller-requested registers
|
|
mov ax, [bp+6]
|
|
mov bx, [bp+8]
|
|
mov cx, [bp+10]
|
|
mov dx, [bp+12]
|
|
lds si, dword ptr [bp+14]
|
|
les di, dword ptr [bp+18]
|
|
|
|
push word ptr [bp+26]
|
|
push word ptr [bp+24]
|
|
push word ptr [bp+22]
|
|
call dword ptr [bp-4]
|
|
|
|
vlm_raw_done:
|
|
pop es
|
|
pop di
|
|
pop si
|
|
pop ds
|
|
|
|
mov sp, bp
|
|
pop bp
|
|
ret
|
|
_Net_Call_VLM_Raw endp
|
|
|
|
|
|
; int C32_LoadNios_Probe(UI axfunc, void *outbuf)
|
|
;
|
|
; 16-bit object, but captures 32-bit ESI and ECX using manual 386 opcodes.
|
|
; This keeps the OMF/linker in 16-bit mode while still reading Client32/NIOS
|
|
; values returned by:
|
|
; INT 2F AX=D8C1
|
|
;
|
|
; outbuf:
|
|
; +00 word AX after INT 2F
|
|
; +02 dword ESI after INT 2F
|
|
; +06 dword ECX after INT 2F
|
|
; +0A word BX
|
|
; +0C word CX low
|
|
; +0E word DX
|
|
; +10 word SI low
|
|
; +12 word DS
|
|
; +14 word ES
|
|
_C32_LoadNios_Probe proc far
|
|
push bp
|
|
mov bp, sp
|
|
|
|
push ds
|
|
push es
|
|
push si
|
|
push di
|
|
|
|
; xor ecx, ecx
|
|
db 66h, 33h, 0C9h
|
|
; xor esi, esi
|
|
db 66h, 33h, 0F6h
|
|
|
|
mov ax, [bp+6]
|
|
int 2Fh
|
|
|
|
push ds
|
|
push es
|
|
push si
|
|
push cx
|
|
push bx
|
|
push dx
|
|
push ax
|
|
|
|
les di, dword ptr [bp+8]
|
|
|
|
; restore AX result into AX and store word at out+0
|
|
pop ax
|
|
mov es:[di+0], ax
|
|
|
|
; Store ESI dword at es:[di+2].
|
|
; Encoding: ES override + operand-size prefix + MOV r/m32,r32
|
|
; mov es:[di+02], esi = 26 66 89 75 02
|
|
db 26h, 66h, 89h, 75h, 02h
|
|
|
|
; Store ECX dword at es:[di+6].
|
|
; mov es:[di+06], ecx = 26 66 89 4Dh 06
|
|
db 26h, 66h, 89h, 4Dh, 06h
|
|
|
|
pop dx
|
|
pop bx
|
|
pop cx
|
|
|
|
mov es:[di+10], bx
|
|
mov es:[di+12], cx
|
|
mov es:[di+14], dx
|
|
|
|
pop ax ; saved SI
|
|
mov es:[di+16], ax
|
|
|
|
pop ax ; saved ES
|
|
pop bx ; saved DS
|
|
mov es:[di+18], bx
|
|
mov es:[di+20], ax
|
|
|
|
pop di
|
|
pop si
|
|
pop es
|
|
pop ds
|
|
pop bp
|
|
xor ah, ah
|
|
ret
|
|
_C32_LoadNios_Probe endp
|
|
|
|
|
|
; int C32_GetFunc_Probe(char *name, void *outbuf)
|
|
;
|
|
; 16-bit OMF Client32 function resolver probe.
|
|
; This mimics C32BEGINUSE for one function name:
|
|
; INT 2F AX=D8C1
|
|
; save ESI as far pointer to __Nios+8 function resolver
|
|
; push name segment
|
|
; push name offset
|
|
; push 0
|
|
; push 0
|
|
; call far [ESI]
|
|
; add sp,8
|
|
;
|
|
; outbuf:
|
|
; +00 word load AX from INT2F
|
|
; +02 dword ESI from INT2F
|
|
; +06 dword ECX from INT2F
|
|
; +0A word resolver return AX
|
|
; +0C word resolver return DX
|
|
; +0E word BX
|
|
; +10 word CX
|
|
_C32_GetFunc_Probe proc far
|
|
push bp
|
|
mov bp, sp
|
|
sub sp, 4
|
|
|
|
push ds
|
|
push es
|
|
push si
|
|
push di
|
|
|
|
; clear ECX/ESI
|
|
db 66h, 33h, 0C9h
|
|
db 66h, 33h, 0F6h
|
|
|
|
mov ax, 0D8C1h
|
|
int 2Fh
|
|
|
|
; save ESI dword to [bp-4]
|
|
db 66h, 89h, 76h, 0FCh
|
|
|
|
push ax ; save load AX
|
|
|
|
; call resolver only if AX == 0
|
|
or ax, ax
|
|
jne c32get_store_fail
|
|
|
|
push word ptr [bp+8] ; name segment
|
|
push word ptr [bp+6] ; name offset
|
|
push 0
|
|
push 0
|
|
call dword ptr [bp-4]
|
|
add sp, 8
|
|
|
|
jmp short c32get_store
|
|
|
|
c32get_store_fail:
|
|
xor dx, dx
|
|
xor ax, ax
|
|
|
|
c32get_store:
|
|
push dx
|
|
push ax
|
|
|
|
les di, dword ptr [bp+10]
|
|
|
|
pop ax ; resolver AX
|
|
pop dx ; resolver DX
|
|
pop bx ; load AX saved in BX temporarily
|
|
|
|
mov es:[di+0], bx
|
|
|
|
; Store ESI dword at out+2: ES override + operand prefix
|
|
db 26h, 66h, 89h, 75h, 02h
|
|
|
|
; Store ECX dword at out+6
|
|
db 26h, 66h, 89h, 4Dh, 06h
|
|
|
|
mov es:[di+10], ax
|
|
mov es:[di+12], dx
|
|
mov es:[di+14], bx
|
|
mov es:[di+16], cx
|
|
|
|
pop di
|
|
pop si
|
|
pop es
|
|
pop ds
|
|
mov sp, bp
|
|
pop bp
|
|
xor ah, ah
|
|
ret
|
|
_C32_GetFunc_Probe endp
|
|
|
|
|
|
; int C32_CallVersion_Nios_Probe(void *outbuf)
|
|
;
|
|
; Safe Client32 version call using the exact d32wrap convention:
|
|
; 1) INT 2F AX=D8C1
|
|
; 2) use ESI resolver to resolve "CLIENT32GetVersion"
|
|
; 3) call ECX trampoline, not the function pointer directly:
|
|
; push 0
|
|
; push 0
|
|
; push fn_seg
|
|
; push fn_off
|
|
; call ECX
|
|
; add sp,8
|
|
;
|
|
; outbuf:
|
|
; +00 load AX
|
|
; +02 resolver off
|
|
; +04 resolver seg
|
|
; +06 trampoline off
|
|
; +08 trampoline seg
|
|
; +0A fn off
|
|
; +0C fn seg
|
|
; +0E call AX
|
|
; +10 call DX
|
|
; +12 flags
|
|
_C32_CallVersion_Nios_Probe proc far
|
|
push bp
|
|
mov bp, sp
|
|
sub sp, 12
|
|
|
|
push ds
|
|
push es
|
|
push si
|
|
push di
|
|
pushf
|
|
|
|
; clear ECX/ESI
|
|
db 66h, 33h, 0C9h
|
|
db 66h, 33h, 0F6h
|
|
|
|
mov ax, 0D8C1h
|
|
int 2Fh
|
|
|
|
; save ESI resolver at [bp-4]
|
|
db 66h, 89h, 76h, 0FCh
|
|
; save ECX trampoline at [bp-8]
|
|
db 66h, 89h, 4Eh, 0F8h
|
|
|
|
push ax ; load AX for output
|
|
or ax, ax
|
|
jne c32ver_fail
|
|
|
|
push cs
|
|
push offset c32ver_name
|
|
push 0
|
|
push 0
|
|
call dword ptr [bp-4]
|
|
add sp, 8
|
|
|
|
; resolver returns DX:AX function pointer
|
|
mov [bp-12], ax
|
|
mov [bp-10], dx
|
|
|
|
or ax, dx
|
|
je c32ver_fail
|
|
|
|
; d32wrap _CLIENT32GetVersion convention:
|
|
push 0
|
|
push 0
|
|
push word ptr [bp-10]
|
|
push word ptr [bp-12]
|
|
call dword ptr [bp-8]
|
|
add sp, 8
|
|
|
|
pushf
|
|
push dx
|
|
push ax
|
|
jmp short c32ver_store
|
|
|
|
c32ver_fail:
|
|
xor dx, dx
|
|
xor ax, ax
|
|
pushf
|
|
push dx
|
|
push ax
|
|
|
|
c32ver_store:
|
|
les di, dword ptr [bp+6]
|
|
|
|
pop ax ; call AX
|
|
pop dx ; call DX
|
|
pop bx ; flags
|
|
pop cx ; load AX
|
|
|
|
mov es:[di+0], cx
|
|
mov cx, word ptr [bp-4]
|
|
mov es:[di+2], cx
|
|
mov cx, word ptr [bp-2]
|
|
mov es:[di+4], cx
|
|
mov cx, word ptr [bp-8]
|
|
mov es:[di+6], cx
|
|
mov cx, word ptr [bp-6]
|
|
mov es:[di+8], cx
|
|
mov cx, word ptr [bp-12]
|
|
mov es:[di+10], cx
|
|
mov cx, word ptr [bp-10]
|
|
mov es:[di+12], cx
|
|
mov es:[di+14], ax
|
|
mov es:[di+16], dx
|
|
mov es:[di+18], bx
|
|
|
|
popf
|
|
pop di
|
|
pop si
|
|
pop es
|
|
pop ds
|
|
mov sp, bp
|
|
pop bp
|
|
xor ah, ah
|
|
ret
|
|
|
|
c32ver_name db 'CLIENT32GetVersion',0
|
|
|
|
_C32_CallVersion_Nios_Probe endp
|
|
|
|
|
|
; int C32_MapLock_Probe(void *ptr, UI len, void *outbuf)
|
|
;
|
|
; Probe d32wrap.o __MapLockFlat / __UnlockFlat:
|
|
; INT 2F AX=D8C1
|
|
; ESI resolver returned by D8C1 is used with command 2 and 3:
|
|
; push len_hi
|
|
; push len_lo
|
|
; push seg
|
|
; push off
|
|
; push 0
|
|
; push 2
|
|
; call ESI ; returns flat DX:AX
|
|
;
|
|
; push len_hi
|
|
; push len_lo
|
|
; push flat_hi
|
|
; push flat_lo
|
|
; push 0
|
|
; push 3
|
|
; call ESI ; unlock
|
|
;
|
|
; outbuf:
|
|
; +00 load AX
|
|
; +02 ESI off
|
|
; +04 ESI seg
|
|
; +06 map AX low
|
|
; +08 map DX high
|
|
; +0A unlock AX
|
|
; +0C unlock DX
|
|
_C32_MapLock_Probe proc far
|
|
push bp
|
|
mov bp, sp
|
|
sub sp, 8
|
|
|
|
push ds
|
|
push es
|
|
push si
|
|
push di
|
|
|
|
; clear ECX/ESI
|
|
db 66h, 33h, 0C9h
|
|
db 66h, 33h, 0F6h
|
|
|
|
mov ax, 0D8C1h
|
|
int 2Fh
|
|
|
|
; save ESI resolver at [bp-4]
|
|
db 66h, 89h, 76h, 0FCh
|
|
push ax ; load AX
|
|
|
|
or ax, ax
|
|
jne mapflat_fail
|
|
|
|
; MapLockFlat(ptr, len)
|
|
push 0
|
|
push word ptr [bp+10] ; len
|
|
push word ptr [bp+8] ; ptr seg
|
|
push word ptr [bp+6] ; ptr off
|
|
push 0
|
|
push 2
|
|
call dword ptr [bp-4]
|
|
add sp, 0cH
|
|
|
|
; save mapped flat DX:AX at [bp-8]
|
|
mov word ptr [bp-8], ax
|
|
mov word ptr [bp-6], dx
|
|
|
|
; UnlockFlat(flat, len)
|
|
push 0
|
|
push word ptr [bp+10] ; len
|
|
push dx
|
|
push ax
|
|
push 0
|
|
push 3
|
|
call dword ptr [bp-4]
|
|
add sp, 0cH
|
|
|
|
jmp short mapflat_store
|
|
|
|
mapflat_fail:
|
|
xor dx, dx
|
|
xor ax, ax
|
|
mov word ptr [bp-8], ax
|
|
mov word ptr [bp-6], dx
|
|
|
|
mapflat_store:
|
|
les di, dword ptr [bp+12]
|
|
|
|
mov bx, ax ; unlock AX
|
|
mov cx, dx ; unlock DX
|
|
pop ax ; load AX
|
|
|
|
mov es:[di+0], ax
|
|
mov ax, word ptr [bp-4]
|
|
mov es:[di+2], ax
|
|
mov ax, word ptr [bp-2]
|
|
mov es:[di+4], ax
|
|
mov ax, word ptr [bp-8]
|
|
mov es:[di+6], ax
|
|
mov ax, word ptr [bp-6]
|
|
mov es:[di+8], ax
|
|
mov es:[di+10], bx
|
|
mov es:[di+12], cx
|
|
|
|
pop di
|
|
pop si
|
|
pop es
|
|
pop ds
|
|
mov sp, bp
|
|
pop bp
|
|
xor ah, ah
|
|
ret
|
|
_C32_MapLock_Probe endp
|
|
|
|
|
|
end
|