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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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| 1171 | 1171 |
| 1172 // Special handling of out of memory exceptions. | 1172 // Special handling of out of memory exceptions. |
| 1173 Failure* out_of_memory = Failure::OutOfMemoryException(); | 1173 Failure* out_of_memory = Failure::OutOfMemoryException(); |
| 1174 __ Branch(eq, throw_out_of_memory_exception, | 1174 __ Branch(eq, throw_out_of_memory_exception, |
| 1175 v0, Operand(reinterpret_cast<int32_t>(out_of_memory))); | 1175 v0, Operand(reinterpret_cast<int32_t>(out_of_memory))); |
| 1176 | 1176 |
| 1177 // Retrieve the pending exception and clear the variable. | 1177 // Retrieve the pending exception and clear the variable. |
| 1178 __ LoadExternalReference(t0, ExternalReference::the_hole_value_location()); | 1178 __ LoadExternalReference(t0, ExternalReference::the_hole_value_location()); |
| 1179 __ lw(a3, MemOperand(t0)); | 1179 __ lw(a3, MemOperand(t0)); |
| 1180 __ LoadExternalReference(t0, | 1180 __ LoadExternalReference(t0, |
| 1181 ExternalReference::pending_exception_address()); | 1181 ExternalReference(Top::k_pending_exception_address)); |
| 1182 __ lw(v0, MemOperand(t0)); | 1182 __ lw(v0, MemOperand(t0)); |
| 1183 __ sw(a3, MemOperand(t0)); | 1183 __ sw(a3, MemOperand(t0)); |
| 1184 | 1184 |
| 1185 // Special handling of termination exceptions which are uncatchable | 1185 // Special handling of termination exceptions which are uncatchable |
| 1186 // by javascript code. | 1186 // by javascript code. |
| 1187 __ Branch(eq, throw_termination_exception, | 1187 __ Branch(eq, throw_termination_exception, |
| 1188 v0, Operand(Factory::termination_exception())); | 1188 v0, Operand(Factory::termination_exception())); |
| 1189 | 1189 |
| 1190 // Handle normal exception. | 1190 // Handle normal exception. |
| 1191 __ b(throw_normal_exception); | 1191 __ b(throw_normal_exception); |
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| 1304 | 1304 |
| 1305 // Call a faked try-block that does the invoke. | 1305 // Call a faked try-block that does the invoke. |
| 1306 __ bal(&invoke); | 1306 __ bal(&invoke); |
| 1307 __ nop(); // Branch delay slot nop. | 1307 __ nop(); // Branch delay slot nop. |
| 1308 | 1308 |
| 1309 // Caught exception: Store result (exception) in the pending | 1309 // Caught exception: Store result (exception) in the pending |
| 1310 // exception field in the JSEnv and return a failure sentinel. | 1310 // exception field in the JSEnv and return a failure sentinel. |
| 1311 // Coming in here the fp will be invalid because the PushTryHandler below | 1311 // Coming in here the fp will be invalid because the PushTryHandler below |
| 1312 // sets it to 0 to signal the existence of the JSEntry frame. | 1312 // sets it to 0 to signal the existence of the JSEntry frame. |
| 1313 __ LoadExternalReference(t0, | 1313 __ LoadExternalReference(t0, |
| 1314 ExternalReference::pending_exception_address()); | 1314 ExternalReference(Top::k_pending_exception_address)); |
| 1315 __ sw(v0, MemOperand(t0)); // We come back from 'invoke'. result is in v0. | 1315 __ sw(v0, MemOperand(t0)); // We come back from 'invoke'. result is in v0. |
| 1316 __ li(v0, Operand(reinterpret_cast<int32_t>(Failure::Exception()))); | 1316 __ li(v0, Operand(reinterpret_cast<int32_t>(Failure::Exception()))); |
| 1317 __ b(&exit); | 1317 __ b(&exit); |
| 1318 __ nop(); // Branch delay slot nop. | 1318 __ nop(); // Branch delay slot nop. |
| 1319 | 1319 |
| 1320 // Invoke: Link this frame into the handler chain. | 1320 // Invoke: Link this frame into the handler chain. |
| 1321 __ bind(&invoke); | 1321 __ bind(&invoke); |
| 1322 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); | 1322 __ PushTryHandler(IN_JS_ENTRY, JS_ENTRY_HANDLER); |
| 1323 // If an exception not caught by another handler occurs, this handler | 1323 // If an exception not caught by another handler occurs, this handler |
| 1324 // returns control to the code after the bal(&invoke) above, which | 1324 // returns control to the code after the bal(&invoke) above, which |
| 1325 // restores all kCalleeSaved registers (including cp and fp) to their | 1325 // restores all kCalleeSaved registers (including cp and fp) to their |
| 1326 // saved values before returning a failure to C. | 1326 // saved values before returning a failure to C. |
| 1327 | 1327 |
| 1328 // Clear any pending exceptions. | 1328 // Clear any pending exceptions. |
| 1329 __ LoadExternalReference(t0, ExternalReference::the_hole_value_location()); | 1329 __ LoadExternalReference(t0, ExternalReference::the_hole_value_location()); |
| 1330 __ lw(t1, MemOperand(t0)); | 1330 __ lw(t1, MemOperand(t0)); |
| 1331 __ LoadExternalReference(t0, | 1331 __ LoadExternalReference(t0, |
| 1332 ExternalReference::pending_exception_address()); | 1332 ExternalReference(Top::k_pending_exception_address)); |
| 1333 __ sw(t1, MemOperand(t0)); | 1333 __ sw(t1, MemOperand(t0)); |
| 1334 | 1334 |
| 1335 // Invoke the function by calling through JS entry trampoline builtin. | 1335 // Invoke the function by calling through JS entry trampoline builtin. |
| 1336 // Notice that we cannot store a reference to the trampoline code directly in | 1336 // Notice that we cannot store a reference to the trampoline code directly in |
| 1337 // this stub, because runtime stubs are not traversed when doing GC. | 1337 // this stub, because runtime stubs are not traversed when doing GC. |
| 1338 | 1338 |
| 1339 // Registers: | 1339 // Registers: |
| 1340 // a0: entry_address | 1340 // a0: entry_address |
| 1341 // a1: function | 1341 // a1: function |
| 1342 // a2: reveiver_pointer | 1342 // a2: reveiver_pointer |
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| 1428 ASSERT(static_cast<unsigned>(cc_) >> 28 < (1 << 15)); | 1428 ASSERT(static_cast<unsigned>(cc_) >> 28 < (1 << 15)); |
| 1429 return (static_cast<unsigned>(cc_) >> 27) | (strict_ ? 1 : 0); | 1429 return (static_cast<unsigned>(cc_) >> 27) | (strict_ ? 1 : 0); |
| 1430 } | 1430 } |
| 1431 | 1431 |
| 1432 | 1432 |
| 1433 #undef __ | 1433 #undef __ |
| 1434 | 1434 |
| 1435 } } // namespace v8::internal | 1435 } } // namespace v8::internal |
| 1436 | 1436 |
| 1437 #endif // V8_TARGET_ARCH_MIPS | 1437 #endif // V8_TARGET_ARCH_MIPS |
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