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/. */
5
6 /* Implement shared vtbl methods. */
7
8 #include "xptcprivate.h"
9
10 /*
11 * This is for AArch64 ABI
12 *
13 * When we're called, the "gp" registers are stored in gprData and
14 * the "fp" registers are stored in fprData. Each array has 8 regs
15 * but first reg in gprData is a placeholder for 'self'.
16 */
17 extern "C" nsresult
PrepareAndDispatch(nsXPTCStubBase * self,uint32_t methodIndex,uint64_t * args,uint64_t * gprData,double * fprData)18 PrepareAndDispatch(nsXPTCStubBase* self, uint32_t methodIndex, uint64_t* args,
19 uint64_t *gprData, double *fprData)
20 {
21 #define PARAM_GPR_COUNT 8
22 #define PARAM_FPR_COUNT 8
23
24 nsXPTCMiniVariant paramBuffer[PARAM_BUFFER_COUNT];
25 const nsXPTMethodInfo* info;
26
27 NS_ASSERTION(self,"no self");
28
29 self->mEntry->GetMethodInfo(uint16_t(methodIndex), &info);
30 NS_ASSERTION(info,"no method info");
31
32 uint32_t paramCount = info->GetParamCount();
33
34 const uint8_t indexOfJSContext = info->IndexOfJSContext();
35
36 uint64_t* ap = args;
37 uint32_t next_gpr = 1; // skip first arg which is 'self'
38 uint32_t next_fpr = 0;
39 for (uint32_t i = 0; i < paramCount; i++) {
40 const nsXPTParamInfo& param = info->GetParam(i);
41 const nsXPTType& type = param.GetType();
42 nsXPTCMiniVariant* dp = ¶mBuffer[i];
43
44 if (i == indexOfJSContext) {
45 if (next_gpr < PARAM_GPR_COUNT)
46 next_gpr++;
47 else
48 ap++;
49 }
50
51 if (param.IsOut() || !type.IsArithmetic()) {
52 if (next_gpr < PARAM_GPR_COUNT) {
53 dp->val.p = (void*)gprData[next_gpr++];
54 } else {
55 dp->val.p = (void*)*ap++;
56 }
57 continue;
58 }
59
60 switch (type) {
61 case nsXPTType::T_I8:
62 if (next_gpr < PARAM_GPR_COUNT) {
63 dp->val.i8 = (int8_t)gprData[next_gpr++];
64 } else {
65 dp->val.i8 = (int8_t)*ap++;
66 }
67 break;
68
69 case nsXPTType::T_I16:
70 if (next_gpr < PARAM_GPR_COUNT) {
71 dp->val.i16 = (int16_t)gprData[next_gpr++];
72 } else {
73 dp->val.i16 = (int16_t)*ap++;
74 }
75 break;
76
77 case nsXPTType::T_I32:
78 if (next_gpr < PARAM_GPR_COUNT) {
79 dp->val.i32 = (int32_t)gprData[next_gpr++];
80 } else {
81 dp->val.i32 = (int32_t)*ap++;
82 }
83 break;
84
85 case nsXPTType::T_I64:
86 if (next_gpr < PARAM_GPR_COUNT) {
87 dp->val.i64 = (int64_t)gprData[next_gpr++];
88 } else {
89 dp->val.i64 = (int64_t)*ap++;
90 }
91 break;
92
93 case nsXPTType::T_U8:
94 if (next_gpr < PARAM_GPR_COUNT) {
95 dp->val.u8 = (uint8_t)gprData[next_gpr++];
96 } else {
97 dp->val.u8 = (uint8_t)*ap++;
98 }
99 break;
100
101 case nsXPTType::T_U16:
102 if (next_gpr < PARAM_GPR_COUNT) {
103 dp->val.u16 = (uint16_t)gprData[next_gpr++];
104 } else {
105 dp->val.u16 = (uint16_t)*ap++;
106 }
107 break;
108
109 case nsXPTType::T_U32:
110 if (next_gpr < PARAM_GPR_COUNT) {
111 dp->val.u32 = (uint32_t)gprData[next_gpr++];
112 } else {
113 dp->val.u32 = (uint32_t)*ap++;
114 }
115 break;
116
117 case nsXPTType::T_U64:
118 if (next_gpr < PARAM_GPR_COUNT) {
119 dp->val.u64 = (uint64_t)gprData[next_gpr++];
120 } else {
121 dp->val.u64 = (uint64_t)*ap++;
122 }
123 break;
124
125 case nsXPTType::T_FLOAT:
126 if (next_fpr < PARAM_FPR_COUNT) {
127 memcpy(&dp->val.f, &fprData[next_fpr++], sizeof(dp->val.f));
128 } else {
129 memcpy(&dp->val.f, ap++, sizeof(dp->val.f));
130 }
131 break;
132
133 case nsXPTType::T_DOUBLE:
134 if (next_fpr < PARAM_FPR_COUNT) {
135 memcpy(&dp->val.d, &fprData[next_fpr++], sizeof(dp->val.d));
136 } else {
137 memcpy(&dp->val.d, ap++, sizeof(dp->val.d));
138 }
139 break;
140
141 case nsXPTType::T_BOOL:
142 if (next_gpr < PARAM_GPR_COUNT) {
143 dp->val.b = (bool)(uint8_t)gprData[next_gpr++];
144 } else {
145 dp->val.b = (bool)(uint8_t)*ap++;
146 }
147 break;
148
149 case nsXPTType::T_CHAR:
150 if (next_gpr < PARAM_GPR_COUNT) {
151 dp->val.c = (char)gprData[next_gpr++];
152 } else {
153 dp->val.c = (char)*ap++;
154 }
155 break;
156
157 case nsXPTType::T_WCHAR:
158 if (next_gpr < PARAM_GPR_COUNT) {
159 dp->val.wc = (wchar_t)gprData[next_gpr++];
160 } else {
161 dp->val.wc = (wchar_t)*ap++;
162 }
163 break;
164
165 default:
166 NS_ASSERTION(0, "bad type");
167 break;
168 }
169 }
170
171 nsresult result = self->mOuter->CallMethod((uint16_t)methodIndex, info,
172 paramBuffer);
173
174 return result;
175 }
176
177 #define STUB_ENTRY(n) /* defined in the assembly file */
178
179 #define SENTINEL_ENTRY(n) \
180 nsresult nsXPTCStubBase::Sentinel##n() \
181 { \
182 NS_ERROR("nsXPTCStubBase::Sentinel called"); \
183 return NS_ERROR_NOT_IMPLEMENTED; \
184 }
185
186 #include "xptcstubsdef.inc"
187