1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; 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) 1998
* the Initial Developer. All Rights Reserved.
*
* Contributor(s):
*
* 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 ***** */
/* Platform specific code to invoke XPCOM methods on native objects */
/* This file is basically a copy of xptcinvoke_gcc_x86_unix.cpp with some
* irrelevant parts stipped off and some OS/2 specific modifications added,
* so it needs to be kept in sync with the original. */
#include "xptcprivate.h"
#include "xptc_platforms_unixish_x86.h"
#include "xptc_gcc_x86_unix.h"
extern "C" {
static
void ATTRIBUTE_USED __attribute__ ((regparm(3)))
invoke_copy_to_stack(PRUint32 paramCount, nsXPTCVariant* s, PRUint32* d)
{
for(PRUint32 i = paramCount; i >0; i--, d++, s++)
{
if(s->IsPtrData())
{
*((void**)d) = s->ptr;
continue;
}
switch(s->type)
{
case nsXPTType::T_I64 : *((PRInt64*) d) = s->val.i64; d++; break;
case nsXPTType::T_U64 : *((PRUint64*)d) = s->val.u64; d++; break;
case nsXPTType::T_DOUBLE : *((double*) d) = s->val.d; d++; break;
default : *((void**)d) = s->val.p; break;
}
}
}
} // extern "C"
/*
XPTC_PUBLIC_API(nsresult)
XPTC_InvokeByIndex(nsISupports* that, PRUint32 methodIndex,
PRUint32 paramCount, nsXPTCVariant* params);
Each param takes at most two 4-byte words.
It doesn't matter if we push too many words, and calculating the exact
amount takes time.
that = ebp + 0x08
methodIndex = ebp + 0x0c
paramCount = ebp + 0x10
params = ebp + 0x14
NOTE NOTE NOTE:
As of 2002-04-29 this function references no global variables nor does
it call non-static functions so preserving and loading the PIC register
is unnecessary. Define MOZ_PRESERVE_PIC if this changes. See mozilla
bug 140412 for details. However, avoid this if you can. It's slower.
*/
#if defined(__declspec)
#define SYMBOL_EXPORT(sym) \
".stabs \"" sym ",0=" sym ",code\", 0x6c,0,0,-42\n\t"
#else
#define SYMBOL_EXPORT(sym)
#endif
__asm__ (
".text\n\t"
/* alignment here seems unimportant here; this was 16, now it's 2 which
is what xptcstubs uses. */
".align 2\n\t"
".globl " SYMBOL_UNDERSCORE "XPTC_InvokeByIndex\n\t"
".type " SYMBOL_UNDERSCORE "XPTC_InvokeByIndex,@function\n"
SYMBOL_EXPORT(SYMBOL_UNDERSCORE "XPTC_InvokeByIndex")
SYMBOL_UNDERSCORE "XPTC_InvokeByIndex:\n\t"
"pushl %ebp\n\t"
"movl %esp, %ebp\n\t"
#ifdef MOZ_PRESERVE_PIC
"pushl %ebx\n\t"
"call 0f\n\t"
".subsection 1\n"
"0:\n\t"
"movl (%esp), %ebx\n\t"
"ret\n\t"
".previous\n\t"
"addl $_GLOBAL_OFFSET_TABLE_, %ebx\n\t"
#endif
"movl 0x10(%ebp), %eax\n\t"
"leal 0(,%eax,8),%edx\n\t"
"movl %esp, %ecx\n\t"
"subl %edx, %ecx\n\t"
/* Since there may be 64-bit data, it occurs to me that aligning this
space might be a performance gain. However, I don't think the rest
of mozilla worries about such things. In any event, do it here.
"andl $0xfffffff8, %ecx\n\t"
*/
"movl %ecx, %esp\n\t" /* make stack space */
"movl 0x14(%ebp), %edx\n\t"
"call " SYMBOL_UNDERSCORE "invoke_copy_to_stack\n\t"
"movl 0x08(%ebp), %ecx\n\t" /* 'that' */
#ifdef CFRONT_STYLE_THIS_ADJUST
"movl (%ecx), %edx\n\t"
"movl 0x0c(%ebp), %eax\n\t" /* function index */
"shll $3, %eax\n\t" /* *= 8 */
"addl $8, %eax\n\t" /* += 8 skip first entry */
"addl %eax, %edx\n\t"
"movswl (%edx), %eax\n\t" /* 'this' offset */
"addl %eax, %ecx\n\t"
"pushl %ecx\n\t"
"addl $4, %edx\n\t" /* += 4, method pointer */
#else /* THUNK_BASED_THIS_ADJUST */
"pushl %ecx\n\t"
"movl (%ecx), %edx\n\t"
"movl 0x0c(%ebp), %eax\n\t" /* function index */
"leal (%edx,%eax,4), %edx\n\t"
#endif
"call *(%edx)\n\t"
#ifdef MOZ_PRESERVE_PIC
"movl -4(%ebp), %ebx\n\t"
#endif
"movl %ebp, %esp\n\t"
"popl %ebp\n\t"
"ret\n"
".size " SYMBOL_UNDERSCORE "XPTC_InvokeByIndex, . -" SYMBOL_UNDERSCORE "XPTC_InvokeByIndex\n\t"
);
|
