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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | |
2 // Redistribution and use in source and binary forms, with or without | |
3 // modification, are permitted provided that the following conditions are | |
4 // met: | |
5 // | |
6 // * Redistributions of source code must retain the above copyright | |
7 // notice, this list of conditions and the following disclaimer. | |
8 // * Redistributions in binary form must reproduce the above | |
9 // copyright notice, this list of conditions and the following | |
10 // disclaimer in the documentation and/or other materials provided | |
11 // with the distribution. | |
12 // * Neither the name of Google Inc. nor the names of its | |
13 // contributors may be used to endorse or promote products derived | |
14 // from this software without specific prior written permission. | |
15 // | |
16 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS | |
17 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT | |
18 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR | |
19 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT | |
20 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, | |
21 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT | |
22 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, | |
23 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY | |
24 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT | |
25 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE | |
26 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. | |
27 | |
28 #ifndef V8_FRAMES_IA32_H_ | |
29 #define V8_FRAMES_IA32_H_ | |
30 | |
31 namespace v8 { namespace internal { | |
32 | |
33 | |
34 // Register lists | |
35 // Note that the bit values must match those used in actual instruction encoding | |
36 static const int kNumRegs = 8; | |
37 | |
38 | |
39 // Caller-saved registers | |
40 static const RegList kJSCallerSaved = | |
41 1 << 0 | // eax | |
42 1 << 1 | // ecx | |
43 1 << 2 | // edx | |
44 1 << 3 | // ebx - used as a caller-saved register in JavaScript code | |
45 1 << 7; // edi - callee function | |
46 | |
47 static const int kNumJSCallerSaved = 5; | |
48 | |
49 typedef Object* JSCallerSavedBuffer[kNumJSCallerSaved]; | |
50 | |
51 // ---------------------------------------------------- | |
52 | |
53 | |
54 class StackHandlerConstants : public AllStatic { | |
55 public: | |
56 static const int kNextOffset = 0 * kPointerSize; | |
57 static const int kPPOffset = 1 * kPointerSize; | |
58 static const int kFPOffset = 2 * kPointerSize; | |
59 | |
60 // TODO(1233780): Get rid of the code slot in stack handlers. | |
61 static const int kCodeOffset = 3 * kPointerSize; | |
62 | |
63 static const int kStateOffset = 4 * kPointerSize; | |
64 static const int kPCOffset = 5 * kPointerSize; | |
65 | |
66 static const int kAddressDisplacement = -1 * kPointerSize; | |
67 static const int kSize = kPCOffset + kPointerSize; | |
68 }; | |
69 | |
70 | |
71 class EntryFrameConstants : public AllStatic { | |
72 public: | |
73 static const int kCallerFPOffset = -6 * kPointerSize; | |
74 | |
75 static const int kFunctionArgOffset = +3 * kPointerSize; | |
76 static const int kReceiverArgOffset = +4 * kPointerSize; | |
77 static const int kArgcOffset = +5 * kPointerSize; | |
78 static const int kArgvOffset = +6 * kPointerSize; | |
79 }; | |
80 | |
81 | |
82 class ExitFrameConstants : public AllStatic { | |
83 public: | |
84 static const int kDebugMarkOffset = -2 * kPointerSize; | |
85 static const int kSPOffset = -1 * kPointerSize; | |
86 | |
87 // Let the parameters pointer for exit frames point just below the | |
88 // frame structure on the stack (frame pointer and return address). | |
89 static const int kPPDisplacement = +2 * kPointerSize; | |
90 | |
91 static const int kCallerFPOffset = 0 * kPointerSize; | |
92 static const int kCallerPCOffset = +1 * kPointerSize; | |
93 }; | |
94 | |
95 | |
96 class StandardFrameConstants : public AllStatic { | |
97 public: | |
98 static const int kExpressionsOffset = -3 * kPointerSize; | |
99 static const int kMarkerOffset = -2 * kPointerSize; | |
100 static const int kContextOffset = -1 * kPointerSize; | |
101 static const int kCallerFPOffset = 0 * kPointerSize; | |
102 static const int kCallerPCOffset = +1 * kPointerSize; | |
103 static const int kCallerSPOffset = +2 * kPointerSize; | |
104 }; | |
105 | |
106 | |
107 class JavaScriptFrameConstants : public AllStatic { | |
108 public: | |
109 // FP-relative. | |
110 static const int kLocal0Offset = StandardFrameConstants::kExpressionsOffset; | |
111 static const int kSavedRegistersOffset = +2 * kPointerSize; | |
112 static const int kFunctionOffset = StandardFrameConstants::kMarkerOffset; | |
113 | |
114 // CallerSP-relative (aka PP-relative) | |
115 static const int kParam0Offset = -2 * kPointerSize; | |
116 static const int kReceiverOffset = -1 * kPointerSize; | |
117 }; | |
118 | |
119 | |
120 class ArgumentsAdaptorFrameConstants : public AllStatic { | |
121 public: | |
122 static const int kLengthOffset = StandardFrameConstants::kExpressionsOffset; | |
123 }; | |
124 | |
125 | |
126 class InternalFrameConstants : public AllStatic { | |
127 public: | |
128 static const int kCodeOffset = StandardFrameConstants::kExpressionsOffset; | |
129 }; | |
130 | |
131 | |
132 inline Object* JavaScriptFrame::function_slot_object() const { | |
133 const int offset = JavaScriptFrameConstants::kFunctionOffset; | |
134 return Memory::Object_at(fp() + offset); | |
135 } | |
136 | |
137 | |
138 // ---------------------------------------------------- | |
139 | |
140 | |
141 | |
142 | |
143 // C Entry frames: | |
144 | |
145 // lower | Stack | | |
146 // addresses | ^ | | |
147 // | | | | |
148 // | | | |
149 // +-------------+ | |
150 // | entry_pc | | |
151 // +-------------+ <--+ entry_sp | |
152 // . | | |
153 // . | | |
154 // . | | |
155 // +-------------+ | | |
156 // -3 | entry_sp --+----+ | |
157 // e +-------------+ | |
158 // n -2 | C function | | |
159 // t +-------------+ | |
160 // r -1 | caller_pp | | |
161 // y +-------------+ <--- fp (frame pointer, ebp) | |
162 // 0 | caller_fp | | |
163 // f +-------------+ | |
164 // r 1 | caller_pc | | |
165 // a +-------------+ <--- caller_sp (stack pointer, esp) | |
166 // m 2 | | | |
167 // e | arguments | | |
168 // | | | |
169 // +- - - - - - -+ | |
170 // | argument0 | | |
171 // +=============+ | |
172 // | | | |
173 // | caller | | |
174 // higher | expressions | | |
175 // addresses | | | |
176 | |
177 | |
178 // Proper JS frames: | |
179 | |
180 // lower | Stack | | |
181 // addresses | ^ | | |
182 // | | | | |
183 // | | | |
184 // ----------- +=============+ <--- sp (stack pointer, esp) | |
185 // | function | | |
186 // +-------------+ | |
187 // | | | |
188 // | expressions | | |
189 // | | | |
190 // +-------------+ | |
191 // a | | | |
192 // c | locals | | |
193 // t | | | |
194 // i +- - - - - - -+ <--- | |
195 // v -4 | local0 | ^ | |
196 // a +-------------+ | | |
197 // t -3 | code | | | |
198 // i +-------------+ | | |
199 // o -2 | context | | kLocal0Offset | |
200 // n +-------------+ | | |
201 // -1 | caller_pp | v | |
202 // f +-------------+ <--- fp (frame pointer, ebp) | |
203 // r 0 | caller_fp | | |
204 // a +-------------+ | |
205 // m 1 | caller_pc | | |
206 // e +-------------+ <--- caller_sp (incl. parameters) | |
207 // 2 | | | |
208 // | parameters | | |
209 // | | | |
210 // +- - - - - - -+ <--- | |
211 // -2 | parameter0 | ^ | |
212 // +-------------+ | kParam0Offset | |
213 // -1 | receiver | v | |
214 // ----------- +=============+ <--- pp (parameter pointer, edi) | |
215 // 0 | function | | |
216 // +-------------+ | |
217 // | | | |
218 // | caller | | |
219 // higher | expressions | | |
220 // addresses | | | |
221 | |
222 | |
223 // JS entry frames: When calling from C to JS, we construct two extra | |
224 // frames: An entry frame (C) and a trampoline frame (JS). The | |
225 // following pictures shows the two frames: | |
226 | |
227 // lower | Stack | | |
228 // addresses | ^ | | |
229 // | | | | |
230 // | | | |
231 // ----------- +=============+ <--- sp (stack pointer, esp) | |
232 // | | | |
233 // | parameters | | |
234 // t | | | |
235 // r +- - - - - - -+ | |
236 // a | parameter0 | | |
237 // m +-------------+ | |
238 // p | receiver | | |
239 // o +-------------+ <--- | |
240 // l | function | ^ | |
241 // i +-------------+ | | |
242 // n -3 | code | | kLocal0Offset | |
243 // e +-------------+ | |
244 // -2 | NULL | context is always NULL | |
245 // +-------------+ | |
246 // f -1 | NULL | caller pp is always NULL for entry frames | |
247 // r +-------------+ <--- fp (frame pointer, ebp) | |
248 // a 0 | caller fp | | |
249 // m +-------------+ | |
250 // e 1 | caller pc | | |
251 // +-------------+ <--- caller_sp (incl. parameters) | |
252 // | 0 | | |
253 // ----------- +=============+ <--- pp (parameter pointer, edi) | |
254 // | 0 | | |
255 // +-------------+ <--- | |
256 // . ^ | |
257 // . | try-handler (HandlerOffsets::kSize) | |
258 // . v | |
259 // +-------------+ <--- | |
260 // -5 | next top pp | | |
261 // +-------------+ | |
262 // e -4 | next top fp | | |
263 // n +-------------+ <--- | |
264 // t -3 | ebx | ^ | |
265 // r +-------------+ | | |
266 // y -2 | esi | | callee-saved registers | |
267 // +-------------+ | | |
268 // -1 | edi | v | |
269 // f +-------------+ <--- fp | |
270 // r 0 | caller fp | | |
271 // a +-------------+ pp == NULL (parameter pointer) | |
272 // m 1 | caller pc | | |
273 // e +-------------+ <--- caller sp | |
274 // 2 | code entry | ^ | |
275 // +-------------+ | | |
276 // 3 | function | | | |
277 // +-------------+ | arguments passed from C code | |
278 // 4 | receiver | | | |
279 // +-------------+ | | |
280 // 5 | argc | | | |
281 // +-------------+ | | |
282 // 6 | argv | v | |
283 // +-------------+ <--- | |
284 // | | | |
285 // higher | | | |
286 // addresses | | | |
287 | |
288 | |
289 } } // namespace v8::internal | |
290 | |
291 #endif // V8_FRAMES_IA32_H_ | |
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