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1 // Copyright 2010 the V8 project authors. All rights reserved. | 1 // Copyright 2010 the V8 project authors. All rights reserved. |
2 // Redistribution and use in source and binary forms, with or without | 2 // Redistribution and use in source and binary forms, with or without |
3 // modification, are permitted provided that the following conditions are | 3 // modification, are permitted provided that the following conditions are |
4 // met: | 4 // met: |
5 // | 5 // |
6 // * Redistributions of source code must retain the above copyright | 6 // * Redistributions of source code must retain the above copyright |
7 // notice, this list of conditions and the following disclaimer. | 7 // notice, this list of conditions and the following disclaimer. |
8 // * Redistributions in binary form must reproduce the above | 8 // * Redistributions in binary form must reproduce the above |
9 // copyright notice, this list of conditions and the following | 9 // copyright notice, this list of conditions and the following |
10 // disclaimer in the documentation and/or other materials provided | 10 // disclaimer in the documentation and/or other materials provided |
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6175 break; | 6175 break; |
6176 case Token::BIT_NOT: | 6176 case Token::BIT_NOT: |
6177 __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_JS); | 6177 __ InvokeBuiltin(Builtins::BIT_NOT, JUMP_JS); |
6178 break; | 6178 break; |
6179 default: | 6179 default: |
6180 UNREACHABLE(); | 6180 UNREACHABLE(); |
6181 } | 6181 } |
6182 } | 6182 } |
6183 | 6183 |
6184 | 6184 |
6185 int CEntryStub::MinorKey() { | |
6186 ASSERT(result_size_ <= 2); | |
6187 // Result returned in r0 or r0+r1 by default. | |
6188 return 0; | |
6189 } | |
6190 | |
6191 | |
6192 void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { | 6185 void CEntryStub::GenerateThrowTOS(MacroAssembler* masm) { |
6193 // r0 holds the exception. | 6186 // r0 holds the exception. |
6194 | 6187 |
6195 // Adjust this code if not the case. | 6188 // Adjust this code if not the case. |
6196 ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); | 6189 ASSERT(StackHandlerConstants::kSize == 4 * kPointerSize); |
6197 | 6190 |
6198 // Drop the sp to the top of the handler. | 6191 // Drop the sp to the top of the handler. |
6199 __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); | 6192 __ mov(r3, Operand(ExternalReference(Top::k_handler_address))); |
6200 __ ldr(sp, MemOperand(r3)); | 6193 __ ldr(sp, MemOperand(r3)); |
6201 | 6194 |
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6289 #endif | 6282 #endif |
6290 ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); | 6283 ASSERT(StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
6291 __ pop(pc); | 6284 __ pop(pc); |
6292 } | 6285 } |
6293 | 6286 |
6294 | 6287 |
6295 void CEntryStub::GenerateCore(MacroAssembler* masm, | 6288 void CEntryStub::GenerateCore(MacroAssembler* masm, |
6296 Label* throw_normal_exception, | 6289 Label* throw_normal_exception, |
6297 Label* throw_termination_exception, | 6290 Label* throw_termination_exception, |
6298 Label* throw_out_of_memory_exception, | 6291 Label* throw_out_of_memory_exception, |
6299 ExitFrame::Mode mode, | |
6300 bool do_gc, | 6292 bool do_gc, |
6301 bool always_allocate) { | 6293 bool always_allocate) { |
6302 // r0: result parameter for PerformGC, if any | 6294 // r0: result parameter for PerformGC, if any |
6303 // r4: number of arguments including receiver (C callee-saved) | 6295 // r4: number of arguments including receiver (C callee-saved) |
6304 // r5: pointer to builtin function (C callee-saved) | 6296 // r5: pointer to builtin function (C callee-saved) |
6305 // r6: pointer to the first argument (C callee-saved) | 6297 // r6: pointer to the first argument (C callee-saved) |
6306 | 6298 |
6307 if (do_gc) { | 6299 if (do_gc) { |
6308 // Passing r0. | 6300 // Passing r0. |
6309 ExternalReference gc_reference = ExternalReference::perform_gc_function(); | 6301 ExternalReference gc_reference = ExternalReference::perform_gc_function(); |
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6349 ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); | 6341 ASSERT(((kFailureTag + 1) & kFailureTagMask) == 0); |
6350 // Lower 2 bits of r2 are 0 iff r0 has failure tag. | 6342 // Lower 2 bits of r2 are 0 iff r0 has failure tag. |
6351 __ add(r2, r0, Operand(1)); | 6343 __ add(r2, r0, Operand(1)); |
6352 __ tst(r2, Operand(kFailureTagMask)); | 6344 __ tst(r2, Operand(kFailureTagMask)); |
6353 __ b(eq, &failure_returned); | 6345 __ b(eq, &failure_returned); |
6354 | 6346 |
6355 // Exit C frame and return. | 6347 // Exit C frame and return. |
6356 // r0:r1: result | 6348 // r0:r1: result |
6357 // sp: stack pointer | 6349 // sp: stack pointer |
6358 // fp: frame pointer | 6350 // fp: frame pointer |
6359 __ LeaveExitFrame(mode); | 6351 __ LeaveExitFrame(mode_); |
6360 | 6352 |
6361 // check if we should retry or throw exception | 6353 // check if we should retry or throw exception |
6362 Label retry; | 6354 Label retry; |
6363 __ bind(&failure_returned); | 6355 __ bind(&failure_returned); |
6364 ASSERT(Failure::RETRY_AFTER_GC == 0); | 6356 ASSERT(Failure::RETRY_AFTER_GC == 0); |
6365 __ tst(r0, Operand(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); | 6357 __ tst(r0, Operand(((1 << kFailureTypeTagSize) - 1) << kFailureTagSize)); |
6366 __ b(eq, &retry); | 6358 __ b(eq, &retry); |
6367 | 6359 |
6368 // Special handling of out of memory exceptions. | 6360 // Special handling of out of memory exceptions. |
6369 Failure* out_of_memory = Failure::OutOfMemoryException(); | 6361 Failure* out_of_memory = Failure::OutOfMemoryException(); |
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6382 __ cmp(r0, Operand(Factory::termination_exception())); | 6374 __ cmp(r0, Operand(Factory::termination_exception())); |
6383 __ b(eq, throw_termination_exception); | 6375 __ b(eq, throw_termination_exception); |
6384 | 6376 |
6385 // Handle normal exception. | 6377 // Handle normal exception. |
6386 __ jmp(throw_normal_exception); | 6378 __ jmp(throw_normal_exception); |
6387 | 6379 |
6388 __ bind(&retry); // pass last failure (r0) as parameter (r0) when retrying | 6380 __ bind(&retry); // pass last failure (r0) as parameter (r0) when retrying |
6389 } | 6381 } |
6390 | 6382 |
6391 | 6383 |
6392 void CEntryStub::GenerateBody(MacroAssembler* masm, bool is_debug_break) { | 6384 void CEntryStub::Generate(MacroAssembler* masm) { |
6393 // Called from JavaScript; parameters are on stack as if calling JS function | 6385 // Called from JavaScript; parameters are on stack as if calling JS function |
6394 // r0: number of arguments including receiver | 6386 // r0: number of arguments including receiver |
6395 // r1: pointer to builtin function | 6387 // r1: pointer to builtin function |
6396 // fp: frame pointer (restored after C call) | 6388 // fp: frame pointer (restored after C call) |
6397 // sp: stack pointer (restored as callee's sp after C call) | 6389 // sp: stack pointer (restored as callee's sp after C call) |
6398 // cp: current context (C callee-saved) | 6390 // cp: current context (C callee-saved) |
6399 | 6391 |
| 6392 // Result returned in r0 or r0+r1 by default. |
| 6393 |
6400 // NOTE: Invocations of builtins may return failure objects | 6394 // NOTE: Invocations of builtins may return failure objects |
6401 // instead of a proper result. The builtin entry handles | 6395 // instead of a proper result. The builtin entry handles |
6402 // this by performing a garbage collection and retrying the | 6396 // this by performing a garbage collection and retrying the |
6403 // builtin once. | 6397 // builtin once. |
6404 | 6398 |
6405 ExitFrame::Mode mode = is_debug_break | |
6406 ? ExitFrame::MODE_DEBUG | |
6407 : ExitFrame::MODE_NORMAL; | |
6408 | |
6409 // Enter the exit frame that transitions from JavaScript to C++. | 6399 // Enter the exit frame that transitions from JavaScript to C++. |
6410 __ EnterExitFrame(mode); | 6400 __ EnterExitFrame(mode_); |
6411 | 6401 |
6412 // r4: number of arguments (C callee-saved) | 6402 // r4: number of arguments (C callee-saved) |
6413 // r5: pointer to builtin function (C callee-saved) | 6403 // r5: pointer to builtin function (C callee-saved) |
6414 // r6: pointer to first argument (C callee-saved) | 6404 // r6: pointer to first argument (C callee-saved) |
6415 | 6405 |
6416 Label throw_normal_exception; | 6406 Label throw_normal_exception; |
6417 Label throw_termination_exception; | 6407 Label throw_termination_exception; |
6418 Label throw_out_of_memory_exception; | 6408 Label throw_out_of_memory_exception; |
6419 | 6409 |
6420 // Call into the runtime system. | 6410 // Call into the runtime system. |
6421 GenerateCore(masm, | 6411 GenerateCore(masm, |
6422 &throw_normal_exception, | 6412 &throw_normal_exception, |
6423 &throw_termination_exception, | 6413 &throw_termination_exception, |
6424 &throw_out_of_memory_exception, | 6414 &throw_out_of_memory_exception, |
6425 mode, | |
6426 false, | 6415 false, |
6427 false); | 6416 false); |
6428 | 6417 |
6429 // Do space-specific GC and retry runtime call. | 6418 // Do space-specific GC and retry runtime call. |
6430 GenerateCore(masm, | 6419 GenerateCore(masm, |
6431 &throw_normal_exception, | 6420 &throw_normal_exception, |
6432 &throw_termination_exception, | 6421 &throw_termination_exception, |
6433 &throw_out_of_memory_exception, | 6422 &throw_out_of_memory_exception, |
6434 mode, | |
6435 true, | 6423 true, |
6436 false); | 6424 false); |
6437 | 6425 |
6438 // Do full GC and retry runtime call one final time. | 6426 // Do full GC and retry runtime call one final time. |
6439 Failure* failure = Failure::InternalError(); | 6427 Failure* failure = Failure::InternalError(); |
6440 __ mov(r0, Operand(reinterpret_cast<int32_t>(failure))); | 6428 __ mov(r0, Operand(reinterpret_cast<int32_t>(failure))); |
6441 GenerateCore(masm, | 6429 GenerateCore(masm, |
6442 &throw_normal_exception, | 6430 &throw_normal_exception, |
6443 &throw_termination_exception, | 6431 &throw_termination_exception, |
6444 &throw_out_of_memory_exception, | 6432 &throw_out_of_memory_exception, |
6445 mode, | |
6446 true, | 6433 true, |
6447 true); | 6434 true); |
6448 | 6435 |
6449 __ bind(&throw_out_of_memory_exception); | 6436 __ bind(&throw_out_of_memory_exception); |
6450 GenerateThrowUncatchable(masm, OUT_OF_MEMORY); | 6437 GenerateThrowUncatchable(masm, OUT_OF_MEMORY); |
6451 | 6438 |
6452 __ bind(&throw_termination_exception); | 6439 __ bind(&throw_termination_exception); |
6453 GenerateThrowUncatchable(masm, TERMINATION); | 6440 GenerateThrowUncatchable(masm, TERMINATION); |
6454 | 6441 |
6455 __ bind(&throw_normal_exception); | 6442 __ bind(&throw_normal_exception); |
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6926 // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) | 6913 // Call the runtime; it returns -1 (less), 0 (equal), or 1 (greater) |
6927 // tagged as a small integer. | 6914 // tagged as a small integer. |
6928 __ bind(&runtime); | 6915 __ bind(&runtime); |
6929 __ TailCallRuntime(ExternalReference(Runtime::kStringCompare), 2, 1); | 6916 __ TailCallRuntime(ExternalReference(Runtime::kStringCompare), 2, 1); |
6930 } | 6917 } |
6931 | 6918 |
6932 | 6919 |
6933 #undef __ | 6920 #undef __ |
6934 | 6921 |
6935 } } // namespace v8::internal | 6922 } } // namespace v8::internal |
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