xpcom/reflect/xptcall/src/md/win32/xptcinvoke_x86_gnu.cpp@129ffea94266
xpcom/reflect/xptcall/src/md/win32/xptcinvoke_x86_gnu.cpp
Sat, 03 Jan 2015 20:18:00 +0100
- author
- Michael Schloh von Bennewitz <michael@schloh.com>
- date
- Sat, 03 Jan 2015 20:18:00 +0100
- branch
- TOR_BUG_3246
- changeset 7
- 129ffea94266
- permissions
- -rw-r--r--
Conditionally enable double key logic according to:
private browsing mode or privacy.thirdparty.isolate preference and
implement in GetCookieStringCommon and FindCookie where it counts...
With some reservations of how to convince FindCookie users to test
condition and pass a nullptr when disabling double key logic.
1 /* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
2 /* This Source Code Form is subject to the terms of the Mozilla Public
3 * License, v. 2.0. If a copy of the MPL was not distributed with this
4 * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
6 /* Platform specific code to invoke XPCOM methods on native objects */
8 #include "xptcprivate.h"
10 extern "C" {
11 void __attribute__ ((__used__)) __attribute__ ((regparm(3)))
12 invoke_copy_to_stack(uint32_t paramCount, nsXPTCVariant* s, uint32_t* d)
13 {
14 for(uint32_t i = paramCount; i >0; i--, d++, s++)
15 {
16 if(s->IsPtrData())
17 {
18 *((void**)d) = s->ptr;
19 continue;
20 }
22 switch(s->type)
23 {
24 case nsXPTType::T_I8 : *((int8_t*) d) = s->val.i8; break;
25 case nsXPTType::T_I16 : *((int16_t*) d) = s->val.i16; break;
26 case nsXPTType::T_I32 : *((int32_t*) d) = s->val.i32; break;
27 case nsXPTType::T_I64 : *((int64_t*) d) = s->val.i64; d++; break;
28 case nsXPTType::T_U8 : *((uint8_t*) d) = s->val.u8; break;
29 case nsXPTType::T_U16 : *((uint16_t*)d) = s->val.u16; break;
30 case nsXPTType::T_U32 : *((uint32_t*)d) = s->val.u32; break;
31 case nsXPTType::T_U64 : *((uint64_t*)d) = s->val.u64; d++; break;
32 case nsXPTType::T_FLOAT : *((float*) d) = s->val.f; break;
33 case nsXPTType::T_DOUBLE : *((double*) d) = s->val.d; d++; break;
34 case nsXPTType::T_BOOL : *((bool*) d) = s->val.b; break;
35 case nsXPTType::T_CHAR : *((char*) d) = s->val.c; break;
36 case nsXPTType::T_WCHAR : *((wchar_t*) d) = s->val.wc; break;
37 default:
38 // all the others are plain pointer types
39 *((void**)d) = s->val.p;
40 break;
41 }
42 }
43 }
44 } // extern "C"
46 /*
47 EXPORT_XPCOM_API(nsresult)
48 NS_InvokeByIndex(nsISupports* that, uint32_t methodIndex,
49 uint32_t paramCount, nsXPTCVariant* params);
51 Each param takes at most two 4-byte words.
52 It doesn't matter if we push too many words, and calculating the exact
53 amount takes time.
55 that = ebp + 0x08
56 methodIndex = ebp + 0x0c
57 paramCount = ebp + 0x10
58 params = ebp + 0x14
60 */
62 __asm__ (
63 ".text\n\t"
64 /* alignment here seems unimportant here; this was 16, now it's 2 which
65 is what xptcstubs uses. */
66 ".align 2\n\t"
67 ".globl _NS_InvokeByIndex\n\t"
68 "_NS_InvokeByIndex:\n\t"
69 "pushl %ebp\n\t"
70 "movl %esp, %ebp\n\t"
71 "movl 0x10(%ebp), %eax\n\t"
72 "leal 0(,%eax,8),%edx\n\t"
74 /* set up call frame for method. */
75 "subl %edx, %esp\n\t" /* make room for params. */
76 /* Align to maximum x86 data size: 128 bits == 16 bytes == XMM register size.
77 * This is to avoid protection faults where SSE+ alignment of stack pointer
78 * is assumed and required, e.g. by GCC4's -ftree-vectorize option.
79 */
80 "andl $0xfffffff0, %esp\n\t" /* drop(?) stack ptr to 128-bit align */
81 /* $esp should be aligned to a 16-byte boundary here (note we include an
82 * additional 4 bytes in a later push instruction). This will ensure $ebp
83 * in the function called below is aligned to a 0x8 boundary. SSE instructions
84 * like movapd/movdqa expect memory operand to be aligned on a 16-byte
85 * boundary. The GCC compiler will generate the memory operand using $ebp
86 * with an 8-byte offset.
87 */
88 "subl $0xc, %esp\n\t" /* lower again; push/call below will re-align */
89 "movl %esp, %ecx\n\t" /* ecx = d */
90 "movl 8(%ebp), %edx\n\t" /* edx = this */
91 "pushl %edx\n\t" /* push this. esp % 16 == 0 */
93 "movl 0x14(%ebp), %edx\n\t"
94 "call _invoke_copy_to_stack\n\t"
95 "movl 0x08(%ebp), %ecx\n\t" /* 'that' */
96 "movl (%ecx), %edx\n\t"
97 "movl 0x0c(%ebp), %eax\n\t" /* function index */
98 "leal (%edx,%eax,4), %edx\n\t"
99 "call *(%edx)\n\t"
100 "movl %ebp, %esp\n\t"
101 "popl %ebp\n\t"
102 "ret\n"
103 ".section .drectve\n\t"
104 ".ascii \" -export:NS_InvokeByIndex\"\n\t"
105 ".text\n\t"
106 );
