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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_MACRO_ASSEMBLER_ARM_H_ | |
29 #define V8_MACRO_ASSEMBLER_ARM_H_ | |
30 | |
31 #include "assembler.h" | |
32 | |
33 namespace v8 { namespace internal { | |
34 | |
35 | |
36 // Give alias names to registers | |
37 extern Register cp; // JavaScript context pointer | |
38 extern Register pp; // parameter pointer | |
39 | |
40 | |
41 // Helper types to make boolean flag easier to read at call-site. | |
42 enum InvokeFlag { | |
43 CALL_FUNCTION, | |
44 JUMP_FUNCTION | |
45 }; | |
46 | |
47 enum InvokeJSFlags { | |
48 CALL_JS, | |
49 JUMP_JS | |
50 }; | |
51 | |
52 enum ExitJSFlag { | |
53 RETURN, | |
54 DO_NOT_RETURN | |
55 }; | |
56 | |
57 enum CodeLocation { | |
58 IN_JAVASCRIPT, | |
59 IN_JS_ENTRY, | |
60 IN_C_ENTRY | |
61 }; | |
62 | |
63 enum HandlerType { | |
64 TRY_CATCH_HANDLER, | |
65 TRY_FINALLY_HANDLER, | |
66 JS_ENTRY_HANDLER | |
67 }; | |
68 | |
69 | |
70 // MacroAssembler implements a collection of frequently used macros. | |
71 class MacroAssembler: public Assembler { | |
72 public: | |
73 MacroAssembler(void* buffer, int size); | |
74 | |
75 // --------------------------------------------------------------------------- | |
76 // Low-level helpers for compiler | |
77 | |
78 // Jump, Call, and Ret pseudo instructions implementing inter-working | |
79 private: | |
80 void Jump(intptr_t target, RelocInfo::Mode rmode, Condition cond = al); | |
81 void Call(intptr_t target, RelocInfo::Mode rmode, Condition cond = al); | |
82 public: | |
83 void Jump(Register target, Condition cond = al); | |
84 void Jump(byte* target, RelocInfo::Mode rmode, Condition cond = al); | |
85 void Jump(Handle<Code> code, RelocInfo::Mode rmode, Condition cond = al); | |
86 void Call(Register target, Condition cond = al); | |
87 void Call(byte* target, RelocInfo::Mode rmode, Condition cond = al); | |
88 void Call(Handle<Code> code, RelocInfo::Mode rmode, Condition cond = al); | |
89 void Ret(Condition cond = al); | |
90 // Jumps to the label at the index given by the Smi in "index". | |
91 void SmiJumpTable(Register index, Vector<Label*> targets); | |
92 | |
93 // Sets the remembered set bit for [address+offset], where address is the | |
94 // address of the heap object 'object'. The address must be in the first 8K | |
95 // of an allocated page. The 'scratch' register is used in the | |
96 // implementation and all 3 registers are clobbered by the operation, as | |
97 // well as the ip register. | |
98 void RecordWrite(Register object, Register offset, Register scratch); | |
99 | |
100 // --------------------------------------------------------------------------- | |
101 // Activation frames | |
102 | |
103 void EnterInternalFrame() { EnterFrame(StackFrame::INTERNAL); } | |
104 void LeaveInternalFrame() { LeaveFrame(StackFrame::INTERNAL); } | |
105 | |
106 void EnterConstructFrame() { EnterFrame(StackFrame::CONSTRUCT); } | |
107 void LeaveConstructFrame() { LeaveFrame(StackFrame::CONSTRUCT); } | |
108 | |
109 // Enter specific kind of exit frame; either EXIT or | |
110 // EXIT_DEBUG. Expects the number of arguments in register r0 and | |
111 // the builtin function to call in register r1. Exits with argc in | |
112 // r4, argv in r6, and and the builtin function to call in r5. | |
113 void EnterExitFrame(StackFrame::Type type); | |
114 | |
115 // Leave the current exit frame. Expects the return value in r0. | |
116 void LeaveExitFrame(StackFrame::Type type); | |
117 | |
118 | |
119 // --------------------------------------------------------------------------- | |
120 // JavaScript invokes | |
121 | |
122 // Invoke the JavaScript function code by either calling or jumping. | |
123 void InvokeCode(Register code, | |
124 const ParameterCount& expected, | |
125 const ParameterCount& actual, | |
126 InvokeFlag flag); | |
127 | |
128 void InvokeCode(Handle<Code> code, | |
129 const ParameterCount& expected, | |
130 const ParameterCount& actual, | |
131 RelocInfo::Mode rmode, | |
132 InvokeFlag flag); | |
133 | |
134 // Invoke the JavaScript function in the given register. Changes the | |
135 // current context to the context in the function before invoking. | |
136 void InvokeFunction(Register function, | |
137 const ParameterCount& actual, | |
138 InvokeFlag flag); | |
139 | |
140 | |
141 #ifdef ENABLE_DEBUGGER_SUPPORT | |
142 // --------------------------------------------------------------------------- | |
143 // Debugger Support | |
144 | |
145 void SaveRegistersToMemory(RegList regs); | |
146 void RestoreRegistersFromMemory(RegList regs); | |
147 void CopyRegistersFromMemoryToStack(Register base, RegList regs); | |
148 void CopyRegistersFromStackToMemory(Register base, | |
149 Register scratch, | |
150 RegList regs); | |
151 #endif | |
152 | |
153 // --------------------------------------------------------------------------- | |
154 // Exception handling | |
155 | |
156 // Push a new try handler and link into try handler chain. | |
157 // The return address must be passed in register lr. | |
158 // On exit, r0 contains TOS (code slot). | |
159 void PushTryHandler(CodeLocation try_location, HandlerType type); | |
160 | |
161 | |
162 // --------------------------------------------------------------------------- | |
163 // Inline caching support | |
164 | |
165 // Generates code that verifies that the maps of objects in the | |
166 // prototype chain of object hasn't changed since the code was | |
167 // generated and branches to the miss label if any map has. If | |
168 // necessary the function also generates code for security check | |
169 // in case of global object holders. The scratch and holder | |
170 // registers are always clobbered, but the object register is only | |
171 // clobbered if it the same as the holder register. The function | |
172 // returns a register containing the holder - either object_reg or | |
173 // holder_reg. | |
174 Register CheckMaps(JSObject* object, Register object_reg, | |
175 JSObject* holder, Register holder_reg, | |
176 Register scratch, Label* miss); | |
177 | |
178 // Generate code for checking access rights - used for security checks | |
179 // on access to global objects across environments. The holder register | |
180 // is left untouched, whereas both scratch registers are clobbered. | |
181 void CheckAccessGlobalProxy(Register holder_reg, | |
182 Register scratch, | |
183 Label* miss); | |
184 | |
185 | |
186 // --------------------------------------------------------------------------- | |
187 // Support functions. | |
188 | |
189 // Generates code for reporting that an illegal operation has | |
190 // occurred. | |
191 void IllegalOperation(int num_arguments); | |
192 | |
193 | |
194 // --------------------------------------------------------------------------- | |
195 // Runtime calls | |
196 | |
197 // Call a code stub. | |
198 void CallStub(CodeStub* stub); | |
199 void CallJSExitStub(CodeStub* stub); | |
200 | |
201 // Return from a code stub after popping its arguments. | |
202 void StubReturn(int argc); | |
203 | |
204 // Call a runtime routine. | |
205 // Eventually this should be used for all C calls. | |
206 void CallRuntime(Runtime::Function* f, int num_arguments); | |
207 | |
208 // Convenience function: Same as above, but takes the fid instead. | |
209 void CallRuntime(Runtime::FunctionId fid, int num_arguments); | |
210 | |
211 // Tail call of a runtime routine (jump). | |
212 // Like JumpToBuiltin, but also takes care of passing the number | |
213 // of parameters. | |
214 void TailCallRuntime(const ExternalReference& ext, int num_arguments); | |
215 | |
216 // Jump to the builtin routine. | |
217 void JumpToBuiltin(const ExternalReference& builtin); | |
218 | |
219 // Invoke specified builtin JavaScript function. Adds an entry to | |
220 // the unresolved list if the name does not resolve. | |
221 void InvokeBuiltin(Builtins::JavaScript id, InvokeJSFlags flags); | |
222 | |
223 // Store the code object for the given builtin in the target register and | |
224 // setup the function in r1. | |
225 void GetBuiltinEntry(Register target, Builtins::JavaScript id); | |
226 | |
227 struct Unresolved { | |
228 int pc; | |
229 uint32_t flags; // see Bootstrapper::FixupFlags decoders/encoders. | |
230 const char* name; | |
231 }; | |
232 List<Unresolved>* unresolved() { return &unresolved_; } | |
233 | |
234 Handle<Object> CodeObject() { return code_object_; } | |
235 | |
236 | |
237 // --------------------------------------------------------------------------- | |
238 // StatsCounter support | |
239 | |
240 void SetCounter(StatsCounter* counter, int value, | |
241 Register scratch1, Register scratch2); | |
242 void IncrementCounter(StatsCounter* counter, int value, | |
243 Register scratch1, Register scratch2); | |
244 void DecrementCounter(StatsCounter* counter, int value, | |
245 Register scratch1, Register scratch2); | |
246 | |
247 | |
248 // --------------------------------------------------------------------------- | |
249 // Debugging | |
250 | |
251 // Calls Abort(msg) if the condition cc is not satisfied. | |
252 // Use --debug_code to enable. | |
253 void Assert(Condition cc, const char* msg); | |
254 | |
255 // Like Assert(), but always enabled. | |
256 void Check(Condition cc, const char* msg); | |
257 | |
258 // Print a message to stdout and abort execution. | |
259 void Abort(const char* msg); | |
260 | |
261 // Verify restrictions about code generated in stubs. | |
262 void set_generating_stub(bool value) { generating_stub_ = value; } | |
263 bool generating_stub() { return generating_stub_; } | |
264 void set_allow_stub_calls(bool value) { allow_stub_calls_ = value; } | |
265 bool allow_stub_calls() { return allow_stub_calls_; } | |
266 | |
267 private: | |
268 List<Unresolved> unresolved_; | |
269 bool generating_stub_; | |
270 bool allow_stub_calls_; | |
271 Handle<Object> code_object_; // This handle will be patched with the code | |
272 // object on installation. | |
273 | |
274 // Helper functions for generating invokes. | |
275 void InvokePrologue(const ParameterCount& expected, | |
276 const ParameterCount& actual, | |
277 Handle<Code> code_constant, | |
278 Register code_reg, | |
279 Label* done, | |
280 InvokeFlag flag); | |
281 | |
282 // Get the code for the given builtin. Returns if able to resolve | |
283 // the function in the 'resolved' flag. | |
284 Handle<Code> ResolveBuiltin(Builtins::JavaScript id, bool* resolved); | |
285 | |
286 // Activation support. | |
287 void EnterFrame(StackFrame::Type type); | |
288 void LeaveFrame(StackFrame::Type type); | |
289 }; | |
290 | |
291 | |
292 // ----------------------------------------------------------------------------- | |
293 // Static helper functions. | |
294 | |
295 // Generate a MemOperand for loading a field from an object. | |
296 static inline MemOperand FieldMemOperand(Register object, int offset) { | |
297 return MemOperand(object, offset - kHeapObjectTag); | |
298 } | |
299 | |
300 | |
301 #ifdef GENERATED_CODE_COVERAGE | |
302 #define CODE_COVERAGE_STRINGIFY(x) #x | |
303 #define CODE_COVERAGE_TOSTRING(x) CODE_COVERAGE_STRINGIFY(x) | |
304 #define __FILE_LINE__ __FILE__ ":" CODE_COVERAGE_TOSTRING(__LINE__) | |
305 #define ACCESS_MASM(masm) masm->stop(__FILE_LINE__); masm-> | |
306 #else | |
307 #define ACCESS_MASM(masm) masm-> | |
308 #endif | |
309 | |
310 | |
311 } } // namespace v8::internal | |
312 | |
313 #endif // V8_MACRO_ASSEMBLER_ARM_H_ | |
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