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
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
|
/* -*- Mode: C; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
/* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
#include "xptcprivate.h"
#include "xptiprivate.h"
#ifndef __AARCH64EL__
#error "Only little endian compatibility was tested"
#endif
/*
* This is for AArch64 ABI
*
* When we're called, the "gp" registers are stored in gprData and
* the "fp" registers are stored in fprData. Each array has 8 regs
* but first reg in gprData is a placeholder for 'self'.
*/
extern "C" nsresult
PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
uint64_t *gprData, double *fprData)
{
#define PARAM_BUFFER_COUNT 16
#define PARAM_GPR_COUNT 8
#define PARAM_FPR_COUNT 8
nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
nsXPTCMiniVariant* dispatchParams = NULL;
const nsXPTMethodInfo* info;
nsresult result = NS_ERROR_FAILURE;
NS_ASSERTION(self,"no self");
self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
NS_ASSERTION(info,"no method info");
uint32_t paramCount = info->GetParamCount();
// setup variant array pointer
if (paramCount > PARAM_BUFFER_COUNT) {
dispatchParams = new nsXPTCMiniVariant[paramCount];
} else {
dispatchParams = paramBuffer;
}
NS_ASSERTION(dispatchParams,"no place for params");
uint64_t* ap = args;
uint32_t next_gpr = 1; // skip first arg which is 'self'
uint32_t next_fpr = 0;
for (uint32_t i = 0; i < paramCount; i++) {
const nsXPTParamInfo& param = info->GetParam(i);
const nsXPTType& type = param.GetType();
nsXPTCMiniVariant* dp = &dispatchParams[i];
if (param.IsOut() || !type.IsArithmetic()) {
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.p = (void*)gprData[next_gpr++];
} else {
dp->val.p = (void*)*ap++;
}
continue;
}
switch (type) {
case nsXPTType::T_I8:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i8 = (int8_t)gprData[next_gpr++];
} else {
dp->val.i8 = (int8_t)*ap++;
}
break;
case nsXPTType::T_I16:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i16 = (int16_t)gprData[next_gpr++];
} else {
dp->val.i16 = (int16_t)*ap++;
}
break;
case nsXPTType::T_I32:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i32 = (int32_t)gprData[next_gpr++];
} else {
dp->val.i32 = (int32_t)*ap++;
}
break;
case nsXPTType::T_I64:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.i64 = (int64_t)gprData[next_gpr++];
} else {
dp->val.i64 = (int64_t)*ap++;
}
break;
case nsXPTType::T_U8:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u8 = (uint8_t)gprData[next_gpr++];
} else {
dp->val.u8 = (uint8_t)*ap++;
}
break;
case nsXPTType::T_U16:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u16 = (uint16_t)gprData[next_gpr++];
} else {
dp->val.u16 = (uint16_t)*ap++;
}
break;
case nsXPTType::T_U32:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u32 = (uint32_t)gprData[next_gpr++];
} else {
dp->val.u32 = (uint32_t)*ap++;
}
break;
case nsXPTType::T_U64:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.u64 = (uint64_t)gprData[next_gpr++];
} else {
dp->val.u64 = (uint64_t)*ap++;
}
break;
case nsXPTType::T_FLOAT:
if (next_fpr < PARAM_FPR_COUNT) {
memcpy(&dp->val.f, &fprData[next_fpr++], sizeof(dp->val.f));
} else {
memcpy(&dp->val.f, ap++, sizeof(dp->val.f));
}
break;
case nsXPTType::T_DOUBLE:
if (next_fpr < PARAM_FPR_COUNT) {
memcpy(&dp->val.d, &fprData[next_fpr++], sizeof(dp->val.d));
} else {
memcpy(&dp->val.d, ap++, sizeof(dp->val.d));
}
break;
case nsXPTType::T_BOOL:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.b = (bool)gprData[next_gpr++];
} else {
dp->val.b = (bool)*ap++;
}
break;
case nsXPTType::T_CHAR:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.c = (char)gprData[next_gpr++];
} else {
dp->val.c = (char)*ap++;
}
break;
case nsXPTType::T_WCHAR:
if (next_gpr < PARAM_GPR_COUNT) {
dp->val.wc = (wchar_t)gprData[next_gpr++];
} else {
dp->val.wc = (wchar_t)*ap++;
}
break;
default:
NS_ASSERTION(0, "bad type");
break;
}
}
result = self->mOuter->CallMethod((uint16_t)methodIndex, info, dispatchParams);
if (dispatchParams != paramBuffer) {
delete [] dispatchParams;
}
return result;
}
// Load w17 with the constant 'n' and branch to SharedStub().
# define STUB_ENTRY(n) \
__asm__ ( \
".section \".text\" \n\t" \
".align 2\n\t" \
".if "#n" < 10 \n\t" \
".globl _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase5Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase5Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase5Stub"#n"Ev: \n\t" \
".elseif "#n" < 100 \n\t" \
".globl _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase6Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase6Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase6Stub"#n"Ev: \n\t" \
".elseif "#n" < 1000 \n\t" \
".globl _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
".hidden _ZN14nsXPTCStubBase7Stub"#n"Ev \n\t" \
".type _ZN14nsXPTCStubBase7Stub"#n"Ev,@function \n\n" \
"_ZN14nsXPTCStubBase7Stub"#n"Ev: \n\t" \
".else \n\t" \
".err \"stub number "#n" >= 1000 not yet supported\"\n" \
".endif \n\t" \
"mov w17,#"#n" \n\t" \
"b SharedStub \n" \
);
#define SENTINEL_ENTRY(n) \
nsresult nsXPTCStubBase::Sentinel##n() \
{ \
NS_ASSERTION(0,"nsXPTCStubBase::Sentinel called"); \
return NS_ERROR_NOT_IMPLEMENTED; \
}
#include "xptcstubsdef.inc"
|
