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| 1 // Copyright 2006-2009 the V8 project authors. All rights reserved. | 1 // Copyright 2006-2009 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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| 335 if (type == StackFrame::EXIT_DEBUG) { | 335 if (type == StackFrame::EXIT_DEBUG) { |
| 336 // This code intentionally clobbers r2 and r3. | 336 // This code intentionally clobbers r2 and r3. |
| 337 const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; | 337 const int kCallerSavedSize = kNumJSCallerSaved * kPointerSize; |
| 338 const int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize; | 338 const int kOffset = ExitFrameConstants::kDebugMarkOffset - kCallerSavedSize; |
| 339 add(r3, fp, Operand(kOffset)); | 339 add(r3, fp, Operand(kOffset)); |
| 340 CopyRegistersFromStackToMemory(r3, r2, kJSCallerSaved); | 340 CopyRegistersFromStackToMemory(r3, r2, kJSCallerSaved); |
| 341 } | 341 } |
| 342 #endif | 342 #endif |
| 343 | 343 |
| 344 // Clear top frame. | 344 // Clear top frame. |
| 345 mov(r3, Operand(0)); | 345 mov(r3, Operand(0, RelocInfo::NONE)); |
| 346 mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); | 346 mov(ip, Operand(ExternalReference(Top::k_c_entry_fp_address))); |
| 347 str(r3, MemOperand(ip)); | 347 str(r3, MemOperand(ip)); |
| 348 | 348 |
| 349 // Restore current context from top and clear it in debug mode. | 349 // Restore current context from top and clear it in debug mode. |
| 350 mov(ip, Operand(ExternalReference(Top::k_context_address))); | 350 mov(ip, Operand(ExternalReference(Top::k_context_address))); |
| 351 ldr(cp, MemOperand(ip)); | 351 ldr(cp, MemOperand(ip)); |
| 352 #ifdef DEBUG | 352 #ifdef DEBUG |
| 353 str(r3, MemOperand(ip)); | 353 str(r3, MemOperand(ip)); |
| 354 #endif | 354 #endif |
| 355 | 355 |
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| 574 ASSERT(StackHandlerConstants::kNextOffset == 0); | 574 ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 575 push(r1); | 575 push(r1); |
| 576 // Link this handler as the new current one. | 576 // Link this handler as the new current one. |
| 577 str(sp, MemOperand(r3)); | 577 str(sp, MemOperand(r3)); |
| 578 } else { | 578 } else { |
| 579 // Must preserve r0-r4, r5-r7 are available. | 579 // Must preserve r0-r4, r5-r7 are available. |
| 580 ASSERT(try_location == IN_JS_ENTRY); | 580 ASSERT(try_location == IN_JS_ENTRY); |
| 581 // The frame pointer does not point to a JS frame so we save NULL | 581 // The frame pointer does not point to a JS frame so we save NULL |
| 582 // for fp. We expect the code throwing an exception to check fp | 582 // for fp. We expect the code throwing an exception to check fp |
| 583 // before dereferencing it to restore the context. | 583 // before dereferencing it to restore the context. |
| 584 mov(ip, Operand(0)); // To save a NULL frame pointer. | 584 mov(ip, Operand(0, RelocInfo::NONE)); // To save a NULL frame pointer. |
| 585 mov(r6, Operand(StackHandler::ENTRY)); | 585 mov(r6, Operand(StackHandler::ENTRY)); |
| 586 ASSERT(StackHandlerConstants::kStateOffset == 1 * kPointerSize | 586 ASSERT(StackHandlerConstants::kStateOffset == 1 * kPointerSize |
| 587 && StackHandlerConstants::kFPOffset == 2 * kPointerSize | 587 && StackHandlerConstants::kFPOffset == 2 * kPointerSize |
| 588 && StackHandlerConstants::kPCOffset == 3 * kPointerSize); | 588 && StackHandlerConstants::kPCOffset == 3 * kPointerSize); |
| 589 stm(db_w, sp, r6.bit() | ip.bit() | lr.bit()); | 589 stm(db_w, sp, r6.bit() | ip.bit() | lr.bit()); |
| 590 // Save the current handler as the next handler. | 590 // Save the current handler as the next handler. |
| 591 mov(r7, Operand(ExternalReference(Top::k_handler_address))); | 591 mov(r7, Operand(ExternalReference(Top::k_handler_address))); |
| 592 ldr(r6, MemOperand(r7)); | 592 ldr(r6, MemOperand(r7)); |
| 593 ASSERT(StackHandlerConstants::kNextOffset == 0); | 593 ASSERT(StackHandlerConstants::kNextOffset == 0); |
| 594 push(r6); | 594 push(r6); |
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| 677 Label same_contexts; | 677 Label same_contexts; |
| 678 | 678 |
| 679 ASSERT(!holder_reg.is(scratch)); | 679 ASSERT(!holder_reg.is(scratch)); |
| 680 ASSERT(!holder_reg.is(ip)); | 680 ASSERT(!holder_reg.is(ip)); |
| 681 ASSERT(!scratch.is(ip)); | 681 ASSERT(!scratch.is(ip)); |
| 682 | 682 |
| 683 // Load current lexical context from the stack frame. | 683 // Load current lexical context from the stack frame. |
| 684 ldr(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); | 684 ldr(scratch, MemOperand(fp, StandardFrameConstants::kContextOffset)); |
| 685 // In debug mode, make sure the lexical context is set. | 685 // In debug mode, make sure the lexical context is set. |
| 686 #ifdef DEBUG | 686 #ifdef DEBUG |
| 687 cmp(scratch, Operand(0)); | 687 cmp(scratch, Operand(0, RelocInfo::NONE)); |
| 688 Check(ne, "we should not have an empty lexical context"); | 688 Check(ne, "we should not have an empty lexical context"); |
| 689 #endif | 689 #endif |
| 690 | 690 |
| 691 // Load the global context of the current context. | 691 // Load the global context of the current context. |
| 692 int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; | 692 int offset = Context::kHeaderSize + Context::GLOBAL_INDEX * kPointerSize; |
| 693 ldr(scratch, FieldMemOperand(scratch, offset)); | 693 ldr(scratch, FieldMemOperand(scratch, offset)); |
| 694 ldr(scratch, FieldMemOperand(scratch, GlobalObject::kGlobalContextOffset)); | 694 ldr(scratch, FieldMemOperand(scratch, GlobalObject::kGlobalContextOffset)); |
| 695 | 695 |
| 696 // Check the context is a global context. | 696 // Check the context is a global context. |
| 697 if (FLAG_debug_code) { | 697 if (FLAG_debug_code) { |
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| 992 #endif | 992 #endif |
| 993 mov(r0, Operand(p0)); | 993 mov(r0, Operand(p0)); |
| 994 push(r0); | 994 push(r0); |
| 995 mov(r0, Operand(Smi::FromInt(p1 - p0))); | 995 mov(r0, Operand(Smi::FromInt(p1 - p0))); |
| 996 push(r0); | 996 push(r0); |
| 997 CallRuntime(Runtime::kAbort, 2); | 997 CallRuntime(Runtime::kAbort, 2); |
| 998 // will not return here | 998 // will not return here |
| 999 } | 999 } |
| 1000 | 1000 |
| 1001 } } // namespace v8::internal | 1001 } } // namespace v8::internal |
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