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1 // Copyright 2006-2008 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2008 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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410 const int kFunctionOffset = 4 * kPointerSize; | 410 const int kFunctionOffset = 4 * kPointerSize; |
411 | 411 |
412 __ EnterInternalFrame(); | 412 __ EnterInternalFrame(); |
413 | 413 |
414 __ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function | 414 __ ldr(r0, MemOperand(fp, kFunctionOffset)); // get the function |
415 __ push(r0); | 415 __ push(r0); |
416 __ ldr(r0, MemOperand(fp, kArgsOffset)); // get the args array | 416 __ ldr(r0, MemOperand(fp, kArgsOffset)); // get the args array |
417 __ push(r0); | 417 __ push(r0); |
418 __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_JS); | 418 __ InvokeBuiltin(Builtins::APPLY_PREPARE, CALL_JS); |
419 | 419 |
420 // Eagerly check for stack-overflow before starting to push the arguments. | 420 Label no_preemption, retry_preemption; |
421 // r0: number of arguments | 421 __ bind(&retry_preemption); |
422 Label okay; | |
423 ExternalReference stack_guard_limit_address = | 422 ExternalReference stack_guard_limit_address = |
424 ExternalReference::address_of_stack_guard_limit(); | 423 ExternalReference::address_of_stack_guard_limit(); |
425 __ mov(r2, Operand(stack_guard_limit_address)); | 424 __ mov(r2, Operand(stack_guard_limit_address)); |
426 __ ldr(r2, MemOperand(r2)); | 425 __ ldr(r2, MemOperand(r2)); |
| 426 __ cmp(sp, r2); |
| 427 __ b(hi, &no_preemption); |
| 428 |
| 429 // We have encountered a preemption or stack overflow already before we push |
| 430 // the array contents. Save r0 which is the Smi-tagged length of the array. |
| 431 __ push(r0); |
| 432 |
| 433 // Runtime routines expect at least one argument, so give it a Smi. |
| 434 __ mov(r0, Operand(Smi::FromInt(0))); |
| 435 __ push(r0); |
| 436 __ CallRuntime(Runtime::kStackGuard, 1); |
| 437 |
| 438 // Since we returned, it wasn't a stack overflow. Restore r0 and try again. |
| 439 __ pop(r0); |
| 440 __ b(&retry_preemption); |
| 441 |
| 442 __ bind(&no_preemption); |
| 443 |
| 444 // Eagerly check for stack-overflow before starting to push the arguments. |
| 445 // r0: number of arguments. |
| 446 // r2: stack limit. |
| 447 Label okay; |
427 __ sub(r2, sp, r2); | 448 __ sub(r2, sp, r2); |
428 __ sub(r2, r2, Operand(3 * kPointerSize)); // limit, index, receiver | |
429 | 449 |
430 __ cmp(r2, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); | 450 __ cmp(r2, Operand(r0, LSL, kPointerSizeLog2 - kSmiTagSize)); |
431 __ b(hi, &okay); | 451 __ b(hi, &okay); |
432 | 452 |
433 // Out of stack space. | 453 // Out of stack space. |
434 __ ldr(r1, MemOperand(fp, kFunctionOffset)); | 454 __ ldr(r1, MemOperand(fp, kFunctionOffset)); |
435 __ push(r1); | 455 __ push(r1); |
436 __ push(r0); | 456 __ push(r0); |
437 __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_JS); | 457 __ InvokeBuiltin(Builtins::APPLY_OVERFLOW, CALL_JS); |
438 | 458 |
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650 // Dont adapt arguments. | 670 // Dont adapt arguments. |
651 // ------------------------------------------- | 671 // ------------------------------------------- |
652 __ bind(&dont_adapt_arguments); | 672 __ bind(&dont_adapt_arguments); |
653 __ mov(pc, r3); | 673 __ mov(pc, r3); |
654 } | 674 } |
655 | 675 |
656 | 676 |
657 #undef __ | 677 #undef __ |
658 | 678 |
659 } } // namespace v8::internal | 679 } } // namespace v8::internal |
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