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COMMENT | -*- Mode: asm; tab-width: 8; c-basic-offset: 4 -*-
***** BEGIN LICENSE BLOCK *****
Version: MPL 1.1/GPL 2.0/LGPL 2.1
The contents of this file are subject to the Mozilla Public License Version
1.1 (the "License"); you may not use this file except in compliance with
the License. You may obtain a copy of the License at
http://www.mozilla.org/MPL/
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
for the specific language governing rights and limitations under the
License.
The Original Code is mozilla.org Code.
The Initial Developer of the Original Code is
Netscape Communications Corporation.
Portions created by the Initial Developer are Copyright (C) 2001
the Initial Developer. All Rights Reserved.
Contributor(s):
Henry Sobotka <sobotka@axess.com>
Alternatively, the contents of this file may be used under the terms of
either of the GNU General Public License Version 2 or later (the "GPL"),
or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"),
in which case the provisions of the GPL or the LGPL are applicable instead
of those above. If you wish to allow use of your version of this file only
under the terms of either the GPL or the LGPL, and not to allow others to
use your version of this file under the terms of the MPL, indicate your
decision by deleting the provisions above and replace them with the notice
and other provisions required by the GPL or the LGPL. If you do not delete
the provisions above, a recipient may use your version of this file under
the terms of any one of the MPL, the GPL or the LGPL.
***** END LICENSE BLOCK *****
Version 1.0 (the "NPL"); you may not use this file except in
compliance with the NPL. You may obtain a copy of the NPL at
http://www.mozilla.org/NPL/
Software distributed under the NPL is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied. See the NPL
for the specific language governing rights and limitations under the
NPL.
The Initial Developer of this code under the NPL is Netscape
Communications Corporation. Portions created by Netscape are
Copyright (C) 1999 Netscape Communications Corporation. All Rights
Reserved.
Contributor: Henry Sobotka <sobotka@axess.com>
This Original Code has been modified by IBM Corporation.
Modifications made by IBM described herein are
Copyright (c) International Business Machines
Corporation, 2000
Modifications to Mozilla code or documentation
identified per MPL Section 3.3
Date Modified by Description of modification
03/23/2000 IBM Corp. Various fixes for parameter passing and adjusting the 'this'
pointer for multiply inherited objects.
xptcall_vacpp.asm: ALP assembler procedures for VAC++ build of xptcall
We use essentially the same algorithm as the other platforms, except
Optlink as calling convention. This means loading the three leftmost
conforming (<= 4 bytes, enum or pointer) parameters into eax, edx and ecx,
and the four leftmost float types atop the FP stack. As "this" goes into
eax, we only have to load edx and ecx (if there are two parameters).
Nonconforming parameters go on the stack. As the right-size space has
to be allocated at the proper place (order of parameters) in the stack
for each conforming parameter, we simply copy them all. |
.486P
.MODEL FLAT, OPTLINK
.STACK
.CODE
t_Int4Bytes equ 001004h
t_Int8Bytes equ 001008h
t_Float4Bytes equ 000104h
t_Float8Bytes equ 000108h
TypesArray dd t_Int4Bytes ; nsXPTType::T_I8
dd t_Int4Bytes ; nsXPTType::T_I16
dd t_Int4Bytes ; nsXPTType::T_I32
dd t_Int8Bytes ; nsXPTType::T_I64 (***)
dd t_Int4Bytes ; nsXPTType::T_U8
dd t_Int4Bytes ; nsXPTType::T_U16
dd t_Int4Bytes ; nsXPTType::T_U32
dd t_Int8Bytes ; nsXPTType::T_U64 (***)
dd t_Float4Bytes ; nsXPTType::T_FLOAT (***)
dd t_Float8Bytes ; nsXPTType::T_DOUBLE (***)
dd t_Int4Bytes ; nsXPTType::T_BOOL
dd t_Int4Bytes ; nsXPTType::T_CHAR
dd t_Int4Bytes ; nsXPTType::T_WCHAR
dd t_Int4Bytes ; TD_VOID
dd t_Int4Bytes ; TD_PNSIID
dd t_Int4Bytes ; TD_DOMSTRING
dd t_Int4Bytes ; TD_PSTRING
dd t_Int4Bytes ; TD_PWSTRING
dd t_Int4Bytes ; TD_INTERFACE_TYPE
dd t_Int4Bytes ; TD_INTERFACE_IS_TYPE
dd t_Int4Bytes ; TD_ARRAY
dd t_Int4Bytes ; TD_PSTRING_SIZE_IS
dd t_Int4Bytes ; TD_PWSTRING_SIZE_IS
dd t_Int4Bytes ; TD_UTF8STRING
dd t_Int4Bytes ; TD_CSTRING
dd t_Int4Bytes ; TD_ASTRING
; All other values default to 4 byte int/ptr
; Optlink puts 'that' in eax, 'index' in edx, 'paramcount' in ecx
; 'params' is on the stack...
XPTC_InvokeByIndex PROC OPTLINK EXPORT USES ebx edi esi, that, index, paramcount, params
LOCAL cparams:dword, fparams:dword, reg_edx:dword, reg_ecx:dword, count:dword
mov dword ptr [that], eax ; that
mov dword ptr [index], edx ; index
mov dword ptr [paramcount], ecx ; paramcount
mov dword ptr [count], ecx ; save a copy of count
; #define FOURBYTES 4
; #define EIGHTBYTES 8
; #define FLOAT 0x00000100
; #define INT 0x00001000
; #define LENGTH 0x000000ff
;
;types[ ] = {
; FOURBYES | INT, // int/uint/ptr/etc
; EIGHTBYTES | INT, // long long
; FOURBYES | FLOAT, // float
; EIGHTBYTES | FLOAT // double
;};
; params+00h = val // double
; params+08h = ptr
; params+0ch = type
; params+0dh = flags
; PTR_IS_DATA = 0x01
; ecx = params
; edx = src
; edi = dst
; ebx = type (bh = int/float, bl = byte count)
xor eax, eax
mov dword ptr [cparams],eax ; cparams = 0;
mov dword ptr [fparams],eax ; fparams = 0;
shl ecx, 03h
sub esp, ecx ; dst/esp = add esp, paramCount * 8
mov edi, esp
push eax ; push 0 // "end" of floating point register stack...
mov ecx, dword ptr [params] ; // params is a "register" variable
@While1:
mov eax, dword ptr [count] ; while( count-- )
or eax, eax ; // (test for zero)
je @EndWhile1
dec eax
mov dword ptr [count], eax
; {
test byte ptr [ecx+0dh],01h ; if ( params->flags & PTR_IS_DATA ) {
je @IfElse1
lea edx, dword ptr [ecx+08h] ; src = ¶ms->ptr;
mov ebx, 01004h ; type = INT | FOURBYTES;
jmp @EndIf1
@IfElse1: ; } else {
mov edx, ecx ; src = ¶ms->val
movzx eax, byte ptr [ecx+0ch] ; type = types[params->type];
cmp eax, 22 ; // range check params->type... (0 to 22)
jle @TypeOK
mov eax,2 ; // all others default to 4 byte int
@TypeOK:
mov ebx, dword ptr [TypesArray+eax*4]
@EndIf1: ; }
test bh, 001h ; if ( type & FLOAT ) {
je @EndIf2
cmp dword ptr [fparams], 4 ; if ( fparams < 4 ) {
jge @EndIf3
push edx ; push src;
push ebx ; push type
inc dword ptr [fparams] ; fparams++;
;;; movzx eax, bl ; // dst += (type & LENGTH);
;;; add edi, eax ;
;;; xor ebx, ebx ; // type = 0; // "handled"
@EndIf3: ; }
@EndIf2: ; }
; // copy bytes...
@While2: or bl, bl ; while( type & LENGTH ) {
je @EndWhile2
test bh, 010h ; if( type & INT ) {
je @EndIf4
cmp dword ptr [cparams], 8 ; if( cparams < 8 ) {
jge @EndIf5
lea eax, dword ptr [reg_edx] ; (®_edx)[cparams] = *src;
sub eax, dword ptr [cparams]
mov esi, dword ptr [edx]
mov dword ptr [eax], esi
add dword ptr [cparams], 4 ; cparams += 4;
;;; jmp @NoCopy ; // goto nocopy;
@EndIf5: ; }
@EndIf4: ; }
mov eax, dword ptr [edx] ; *dst = *src;
mov dword ptr [edi], eax
@NoCopy: ;nocopy:
add edi, 4 ; dst++;
add edx, 4 ; src++;
sub bl, 4 ; type -= 4;
jmp @While2
@EndWhile2: ; }
add ecx, 010h ; params++;
jmp @While1
@EndWhile1: ; }
; // Set up fpu and regs can make the call...
@While3: pop ebx ; while ( pop type ) {
or ebx, ebx
je @EndWhile3
pop edx ; pop src
cmp bl, 08h ; if( type & EIGHTBYTES ) {
jne @IfElse6
fld qword ptr [edx] ; fld qword ptr [src]
jmp @EndIf6
@IfElse6: ; } else {
fld dword ptr [edx] ; fld dword ptr [src]
@EndIf6: ; }
jmp @While3
@EndWhile3: ; }
; make the call
mov eax, dword ptr [that] ; get 'that' ("this" ptr)
mov ebx, dword ptr [index] ; get index
shl ebx, 03h ; index *= 8 bytes per method
add ebx, 08h ; += 8 at head of vtable
add ebx, [eax] ; calculate address
mov ecx, dword ptr [ebx+04h]
add eax, ecx
sub esp, 04h ; make room for 'this' ptr on stack
mov edx, dword ptr [reg_edx]
mov ecx, dword ptr [reg_ecx]
call dword ptr [ebx] ; call method
mov ecx, dword ptr [paramcount]
shl ecx, 03h
add esp, ecx ; remove space on stack for params
add esp, 04h ; remove space on stack for 'this' ptr
ret
ENDP
END
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