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1 // Copyright 2011 the V8 project authors. All rights reserved. | 1 // Copyright 2011 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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3555 __ mov(r7, Operand(Smi::FromInt(marker))); | 3555 __ mov(r7, Operand(Smi::FromInt(marker))); |
3556 __ mov(r6, Operand(Smi::FromInt(marker))); | 3556 __ mov(r6, Operand(Smi::FromInt(marker))); |
3557 __ mov(r5, | 3557 __ mov(r5, |
3558 Operand(ExternalReference(Isolate::k_c_entry_fp_address, isolate))); | 3558 Operand(ExternalReference(Isolate::k_c_entry_fp_address, isolate))); |
3559 __ ldr(r5, MemOperand(r5)); | 3559 __ ldr(r5, MemOperand(r5)); |
3560 __ Push(r8, r7, r6, r5); | 3560 __ Push(r8, r7, r6, r5); |
3561 | 3561 |
3562 // Setup frame pointer for the frame to be pushed. | 3562 // Setup frame pointer for the frame to be pushed. |
3563 __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); | 3563 __ add(fp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
3564 | 3564 |
3565 #ifdef ENABLE_LOGGING_AND_PROFILING | |
3566 // If this is the outermost JS call, set js_entry_sp value. | 3565 // If this is the outermost JS call, set js_entry_sp value. |
3567 Label non_outermost_js; | 3566 Label non_outermost_js; |
3568 ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, isolate); | 3567 ExternalReference js_entry_sp(Isolate::k_js_entry_sp_address, isolate); |
3569 __ mov(r5, Operand(ExternalReference(js_entry_sp))); | 3568 __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
3570 __ ldr(r6, MemOperand(r5)); | 3569 __ ldr(r6, MemOperand(r5)); |
3571 __ cmp(r6, Operand(0)); | 3570 __ cmp(r6, Operand(0)); |
3572 __ b(ne, &non_outermost_js); | 3571 __ b(ne, &non_outermost_js); |
3573 __ str(fp, MemOperand(r5)); | 3572 __ str(fp, MemOperand(r5)); |
3574 __ mov(ip, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); | 3573 __ mov(ip, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
3575 Label cont; | 3574 Label cont; |
3576 __ b(&cont); | 3575 __ b(&cont); |
3577 __ bind(&non_outermost_js); | 3576 __ bind(&non_outermost_js); |
3578 __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); | 3577 __ mov(ip, Operand(Smi::FromInt(StackFrame::INNER_JSENTRY_FRAME))); |
3579 __ bind(&cont); | 3578 __ bind(&cont); |
3580 __ push(ip); | 3579 __ push(ip); |
3581 #endif | |
3582 | 3580 |
3583 // Call a faked try-block that does the invoke. | 3581 // Call a faked try-block that does the invoke. |
3584 __ bl(&invoke); | 3582 __ bl(&invoke); |
3585 | 3583 |
3586 // Caught exception: Store result (exception) in the pending | 3584 // Caught exception: Store result (exception) in the pending |
3587 // exception field in the JSEnv and return a failure sentinel. | 3585 // exception field in the JSEnv and return a failure sentinel. |
3588 // Coming in here the fp will be invalid because the PushTryHandler below | 3586 // Coming in here the fp will be invalid because the PushTryHandler below |
3589 // sets it to 0 to signal the existence of the JSEntry frame. | 3587 // sets it to 0 to signal the existence of the JSEntry frame. |
3590 __ mov(ip, Operand(ExternalReference(Isolate::k_pending_exception_address, | 3588 __ mov(ip, Operand(ExternalReference(Isolate::k_pending_exception_address, |
3591 isolate))); | 3589 isolate))); |
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3632 // Branch and link to JSEntryTrampoline. We don't use the double underscore | 3630 // Branch and link to JSEntryTrampoline. We don't use the double underscore |
3633 // macro for the add instruction because we don't want the coverage tool | 3631 // macro for the add instruction because we don't want the coverage tool |
3634 // inserting instructions here after we read the pc. | 3632 // inserting instructions here after we read the pc. |
3635 __ mov(lr, Operand(pc)); | 3633 __ mov(lr, Operand(pc)); |
3636 masm->add(pc, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); | 3634 masm->add(pc, ip, Operand(Code::kHeaderSize - kHeapObjectTag)); |
3637 | 3635 |
3638 // Unlink this frame from the handler chain. | 3636 // Unlink this frame from the handler chain. |
3639 __ PopTryHandler(); | 3637 __ PopTryHandler(); |
3640 | 3638 |
3641 __ bind(&exit); // r0 holds result | 3639 __ bind(&exit); // r0 holds result |
3642 #ifdef ENABLE_LOGGING_AND_PROFILING | |
3643 // Check if the current stack frame is marked as the outermost JS frame. | 3640 // Check if the current stack frame is marked as the outermost JS frame. |
3644 Label non_outermost_js_2; | 3641 Label non_outermost_js_2; |
3645 __ pop(r5); | 3642 __ pop(r5); |
3646 __ cmp(r5, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); | 3643 __ cmp(r5, Operand(Smi::FromInt(StackFrame::OUTERMOST_JSENTRY_FRAME))); |
3647 __ b(ne, &non_outermost_js_2); | 3644 __ b(ne, &non_outermost_js_2); |
3648 __ mov(r6, Operand(0)); | 3645 __ mov(r6, Operand(0)); |
3649 __ mov(r5, Operand(ExternalReference(js_entry_sp))); | 3646 __ mov(r5, Operand(ExternalReference(js_entry_sp))); |
3650 __ str(r6, MemOperand(r5)); | 3647 __ str(r6, MemOperand(r5)); |
3651 __ bind(&non_outermost_js_2); | 3648 __ bind(&non_outermost_js_2); |
3652 #endif | |
3653 | 3649 |
3654 // Restore the top frame descriptors from the stack. | 3650 // Restore the top frame descriptors from the stack. |
3655 __ pop(r3); | 3651 __ pop(r3); |
3656 __ mov(ip, | 3652 __ mov(ip, |
3657 Operand(ExternalReference(Isolate::k_c_entry_fp_address, isolate))); | 3653 Operand(ExternalReference(Isolate::k_c_entry_fp_address, isolate))); |
3658 __ str(r3, MemOperand(ip)); | 3654 __ str(r3, MemOperand(ip)); |
3659 | 3655 |
3660 // Reset the stack to the callee saved registers. | 3656 // Reset the stack to the callee saved registers. |
3661 __ add(sp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); | 3657 __ add(sp, sp, Operand(-EntryFrameConstants::kCallerFPOffset)); |
3662 | 3658 |
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6587 __ mov(result, Operand(0)); | 6583 __ mov(result, Operand(0)); |
6588 __ Ret(); | 6584 __ Ret(); |
6589 } | 6585 } |
6590 | 6586 |
6591 | 6587 |
6592 #undef __ | 6588 #undef __ |
6593 | 6589 |
6594 } } // namespace v8::internal | 6590 } } // namespace v8::internal |
6595 | 6591 |
6596 #endif // V8_TARGET_ARCH_ARM | 6592 #endif // V8_TARGET_ARCH_ARM |
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