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1 // Copyright 2012 the V8 project authors. All rights reserved. | 1 // Copyright 2012 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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1013 // If we are using the simulator then we should always align to the expected | 1013 // If we are using the simulator then we should always align to the expected |
1014 // alignment. As the simulator is used to generate snapshots we do not know | 1014 // alignment. As the simulator is used to generate snapshots we do not know |
1015 // if the target platform will need alignment, so this is controlled from a | 1015 // if the target platform will need alignment, so this is controlled from a |
1016 // flag. | 1016 // flag. |
1017 return FLAG_sim_stack_alignment; | 1017 return FLAG_sim_stack_alignment; |
1018 #endif // V8_HOST_ARCH_ARM | 1018 #endif // V8_HOST_ARCH_ARM |
1019 } | 1019 } |
1020 | 1020 |
1021 | 1021 |
1022 void MacroAssembler::LeaveExitFrame(bool save_doubles, | 1022 void MacroAssembler::LeaveExitFrame(bool save_doubles, |
1023 Register argument_count, | 1023 Register argument_count) { |
1024 bool restore_context) { | |
1025 // Optionally restore all double registers. | 1024 // Optionally restore all double registers. |
1026 if (save_doubles) { | 1025 if (save_doubles) { |
1027 // Calculate the stack location of the saved doubles and restore them. | 1026 // Calculate the stack location of the saved doubles and restore them. |
1028 const int offset = 2 * kPointerSize; | 1027 const int offset = 2 * kPointerSize; |
1029 sub(r3, fp, | 1028 sub(r3, fp, |
1030 Operand(offset + DwVfpRegister::kMaxNumRegisters * kDoubleSize)); | 1029 Operand(offset + DwVfpRegister::kMaxNumRegisters * kDoubleSize)); |
1031 RestoreFPRegs(r3, ip); | 1030 RestoreFPRegs(r3, ip); |
1032 } | 1031 } |
1033 | 1032 |
1034 // Clear top frame. | 1033 // Clear top frame. |
1035 mov(r3, Operand::Zero()); | 1034 mov(r3, Operand::Zero()); |
1036 mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); | 1035 mov(ip, Operand(ExternalReference(Isolate::kCEntryFPAddress, isolate()))); |
1037 str(r3, MemOperand(ip)); | 1036 str(r3, MemOperand(ip)); |
1038 | 1037 |
1039 | |
1040 // Restore current context from top and clear it in debug mode. | 1038 // Restore current context from top and clear it in debug mode. |
1041 if (restore_context) { | 1039 mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); |
1042 mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); | 1040 ldr(cp, MemOperand(ip)); |
1043 ldr(cp, MemOperand(ip)); | |
1044 } | |
1045 #ifdef DEBUG | 1041 #ifdef DEBUG |
1046 mov(ip, Operand(ExternalReference(Isolate::kContextAddress, isolate()))); | |
1047 str(r3, MemOperand(ip)); | 1042 str(r3, MemOperand(ip)); |
1048 #endif | 1043 #endif |
1049 | 1044 |
1050 // Tear down the exit frame, pop the arguments, and return. | 1045 // Tear down the exit frame, pop the arguments, and return. |
1051 mov(sp, Operand(fp)); | 1046 mov(sp, Operand(fp)); |
1052 ldm(ia_w, sp, fp.bit() | lr.bit()); | 1047 ldm(ia_w, sp, fp.bit() | lr.bit()); |
1053 if (argument_count.is_valid()) { | 1048 if (argument_count.is_valid()) { |
1054 add(sp, sp, Operand(argument_count, LSL, kPointerSizeLog2)); | 1049 add(sp, sp, Operand(argument_count, LSL, kPointerSizeLog2)); |
1055 } | 1050 } |
1056 } | 1051 } |
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2278 stub->CompilingCallsToThisStubIsGCSafe(isolate())); | 2273 stub->CompilingCallsToThisStubIsGCSafe(isolate())); |
2279 Jump(stub->GetCode(isolate()), RelocInfo::CODE_TARGET, cond); | 2274 Jump(stub->GetCode(isolate()), RelocInfo::CODE_TARGET, cond); |
2280 } | 2275 } |
2281 | 2276 |
2282 | 2277 |
2283 static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { | 2278 static int AddressOffset(ExternalReference ref0, ExternalReference ref1) { |
2284 return ref0.address() - ref1.address(); | 2279 return ref0.address() - ref1.address(); |
2285 } | 2280 } |
2286 | 2281 |
2287 | 2282 |
2288 void MacroAssembler::CallApiFunctionAndReturn( | 2283 void MacroAssembler::CallApiFunctionAndReturn(ExternalReference function, |
2289 ExternalReference function, | 2284 Address function_address, |
2290 Address function_address, | 2285 ExternalReference thunk_ref, |
2291 ExternalReference thunk_ref, | 2286 Register thunk_last_arg, |
2292 Register thunk_last_arg, | 2287 int stack_space, |
2293 int stack_space, | 2288 int return_value_offset) { |
2294 MemOperand return_value_operand, | |
2295 MemOperand* context_restore_operand) { | |
2296 ExternalReference next_address = | 2289 ExternalReference next_address = |
2297 ExternalReference::handle_scope_next_address(isolate()); | 2290 ExternalReference::handle_scope_next_address(isolate()); |
2298 const int kNextOffset = 0; | 2291 const int kNextOffset = 0; |
2299 const int kLimitOffset = AddressOffset( | 2292 const int kLimitOffset = AddressOffset( |
2300 ExternalReference::handle_scope_limit_address(isolate()), | 2293 ExternalReference::handle_scope_limit_address(isolate()), |
2301 next_address); | 2294 next_address); |
2302 const int kLevelOffset = AddressOffset( | 2295 const int kLevelOffset = AddressOffset( |
2303 ExternalReference::handle_scope_level_address(isolate()), | 2296 ExternalReference::handle_scope_level_address(isolate()), |
2304 next_address); | 2297 next_address); |
2305 | 2298 |
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2349 if (FLAG_log_timer_events) { | 2342 if (FLAG_log_timer_events) { |
2350 FrameScope frame(this, StackFrame::MANUAL); | 2343 FrameScope frame(this, StackFrame::MANUAL); |
2351 PushSafepointRegisters(); | 2344 PushSafepointRegisters(); |
2352 PrepareCallCFunction(1, r0); | 2345 PrepareCallCFunction(1, r0); |
2353 mov(r0, Operand(ExternalReference::isolate_address(isolate()))); | 2346 mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
2354 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); | 2347 CallCFunction(ExternalReference::log_leave_external_function(isolate()), 1); |
2355 PopSafepointRegisters(); | 2348 PopSafepointRegisters(); |
2356 } | 2349 } |
2357 | 2350 |
2358 Label promote_scheduled_exception; | 2351 Label promote_scheduled_exception; |
2359 Label exception_handled; | |
2360 Label delete_allocated_handles; | 2352 Label delete_allocated_handles; |
2361 Label leave_exit_frame; | 2353 Label leave_exit_frame; |
2362 Label return_value_loaded; | 2354 Label return_value_loaded; |
2363 | 2355 |
2364 // load value from ReturnValue | 2356 // load value from ReturnValue |
2365 ldr(r0, return_value_operand); | 2357 ldr(r0, MemOperand(fp, return_value_offset*kPointerSize)); |
2366 bind(&return_value_loaded); | 2358 bind(&return_value_loaded); |
2367 // No more valid handles (the result handle was the last one). Restore | 2359 // No more valid handles (the result handle was the last one). Restore |
2368 // previous handle scope. | 2360 // previous handle scope. |
2369 str(r4, MemOperand(r7, kNextOffset)); | 2361 str(r4, MemOperand(r7, kNextOffset)); |
2370 if (emit_debug_code()) { | 2362 if (emit_debug_code()) { |
2371 ldr(r1, MemOperand(r7, kLevelOffset)); | 2363 ldr(r1, MemOperand(r7, kLevelOffset)); |
2372 cmp(r1, r6); | 2364 cmp(r1, r6); |
2373 Check(eq, kUnexpectedLevelAfterReturnFromApiCall); | 2365 Check(eq, kUnexpectedLevelAfterReturnFromApiCall); |
2374 } | 2366 } |
2375 sub(r6, r6, Operand(1)); | 2367 sub(r6, r6, Operand(1)); |
2376 str(r6, MemOperand(r7, kLevelOffset)); | 2368 str(r6, MemOperand(r7, kLevelOffset)); |
2377 ldr(ip, MemOperand(r7, kLimitOffset)); | 2369 ldr(ip, MemOperand(r7, kLimitOffset)); |
2378 cmp(r5, ip); | 2370 cmp(r5, ip); |
2379 b(ne, &delete_allocated_handles); | 2371 b(ne, &delete_allocated_handles); |
2380 | 2372 |
2381 // Check if the function scheduled an exception. | 2373 // Check if the function scheduled an exception. |
2382 bind(&leave_exit_frame); | 2374 bind(&leave_exit_frame); |
2383 LoadRoot(r4, Heap::kTheHoleValueRootIndex); | 2375 LoadRoot(r4, Heap::kTheHoleValueRootIndex); |
2384 mov(ip, Operand(ExternalReference::scheduled_exception_address(isolate()))); | 2376 mov(ip, Operand(ExternalReference::scheduled_exception_address(isolate()))); |
2385 ldr(r5, MemOperand(ip)); | 2377 ldr(r5, MemOperand(ip)); |
2386 cmp(r4, r5); | 2378 cmp(r4, r5); |
2387 b(ne, &promote_scheduled_exception); | 2379 b(ne, &promote_scheduled_exception); |
2388 bind(&exception_handled); | |
2389 | 2380 |
2390 bool restore_context = context_restore_operand != NULL; | |
2391 if (restore_context) { | |
2392 ldr(cp, *context_restore_operand); | |
2393 } | |
2394 // LeaveExitFrame expects unwind space to be in a register. | 2381 // LeaveExitFrame expects unwind space to be in a register. |
2395 mov(r4, Operand(stack_space)); | 2382 mov(r4, Operand(stack_space)); |
2396 LeaveExitFrame(false, r4, !restore_context); | 2383 LeaveExitFrame(false, r4); |
2397 mov(pc, lr); | 2384 mov(pc, lr); |
2398 | 2385 |
2399 bind(&promote_scheduled_exception); | 2386 bind(&promote_scheduled_exception); |
2400 CallExternalReference( | 2387 TailCallExternalReference( |
2401 ExternalReference(Runtime::kPromoteScheduledException, isolate()), | 2388 ExternalReference(Runtime::kPromoteScheduledException, isolate()), |
2402 0); | 2389 0, |
2403 jmp(&exception_handled); | 2390 1); |
2404 | 2391 |
2405 // HandleScope limit has changed. Delete allocated extensions. | 2392 // HandleScope limit has changed. Delete allocated extensions. |
2406 bind(&delete_allocated_handles); | 2393 bind(&delete_allocated_handles); |
2407 str(r5, MemOperand(r7, kLimitOffset)); | 2394 str(r5, MemOperand(r7, kLimitOffset)); |
2408 mov(r4, r0); | 2395 mov(r4, r0); |
2409 PrepareCallCFunction(1, r5); | 2396 PrepareCallCFunction(1, r5); |
2410 mov(r0, Operand(ExternalReference::isolate_address(isolate()))); | 2397 mov(r0, Operand(ExternalReference::isolate_address(isolate()))); |
2411 CallCFunction( | 2398 CallCFunction( |
2412 ExternalReference::delete_handle_scope_extensions(isolate()), 1); | 2399 ExternalReference::delete_handle_scope_extensions(isolate()), 1); |
2413 mov(r0, r4); | 2400 mov(r0, r4); |
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3897 void CodePatcher::EmitCondition(Condition cond) { | 3884 void CodePatcher::EmitCondition(Condition cond) { |
3898 Instr instr = Assembler::instr_at(masm_.pc_); | 3885 Instr instr = Assembler::instr_at(masm_.pc_); |
3899 instr = (instr & ~kCondMask) | cond; | 3886 instr = (instr & ~kCondMask) | cond; |
3900 masm_.emit(instr); | 3887 masm_.emit(instr); |
3901 } | 3888 } |
3902 | 3889 |
3903 | 3890 |
3904 } } // namespace v8::internal | 3891 } } // namespace v8::internal |
3905 | 3892 |
3906 #endif // V8_TARGET_ARCH_ARM | 3893 #endif // V8_TARGET_ARCH_ARM |
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