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Issue 2069013: Orthogonalize the byte codes used for the snapshot so that... (Closed) Base URL: http://v8.googlecode.com/svn/branches/bleeding_edge/
Patch Set: '' Created 10 years, 7 months ago
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1 // Copyright (c) 1994-2006 Sun Microsystems Inc. 1 // Copyright (c) 1994-2006 Sun Microsystems Inc.
2 // All Rights Reserved. 2 // All Rights Reserved.
3 // 3 //
4 // Redistribution and use in source and binary forms, with or without 4 // Redistribution and use in source and binary forms, with or without
5 // modification, are permitted provided that the following conditions 5 // modification, are permitted provided that the following conditions
6 // are met: 6 // are met:
7 // 7 //
8 // - Redistributions of source code must retain the above copyright notice, 8 // - Redistributions of source code must retain the above copyright notice,
9 // this list of conditions and the following disclaimer. 9 // this list of conditions and the following disclaimer.
10 // 10 //
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155 155
156 // ----------------------------------------------------------------------------- 156 // -----------------------------------------------------------------------------
157 // Implementation of RelocInfo 157 // Implementation of RelocInfo
158 158
159 159
160 const int RelocInfo::kApplyMask = 160 const int RelocInfo::kApplyMask =
161 RelocInfo::kCodeTargetMask | 1 << RelocInfo::RUNTIME_ENTRY | 161 RelocInfo::kCodeTargetMask | 1 << RelocInfo::RUNTIME_ENTRY |
162 1 << RelocInfo::JS_RETURN | 1 << RelocInfo::INTERNAL_REFERENCE; 162 1 << RelocInfo::JS_RETURN | 1 << RelocInfo::INTERNAL_REFERENCE;
163 163
164 164
165 bool RelocInfo::IsCodedSpecially() {
166 // The deserializer needs to know whether a pointer is specially coded. Being
167 // specially coded on IA32 means that it is a relative address, as used by
168 // branch instructions. These are also the ones that need changing when a
169 // code object moves.
170 return (1 << rmode_) & kApplyMask;
171 }
172
173
165 void RelocInfo::PatchCode(byte* instructions, int instruction_count) { 174 void RelocInfo::PatchCode(byte* instructions, int instruction_count) {
166 // Patch the code at the current address with the supplied instructions. 175 // Patch the code at the current address with the supplied instructions.
167 for (int i = 0; i < instruction_count; i++) { 176 for (int i = 0; i < instruction_count; i++) {
168 *(pc_ + i) = *(instructions + i); 177 *(pc_ + i) = *(instructions + i);
169 } 178 }
170 179
171 // Indicate that code has changed. 180 // Indicate that code has changed.
172 CPU::FlushICache(pc_, instruction_count); 181 CPU::FlushICache(pc_, instruction_count);
173 } 182 }
174 183
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2532 fprintf(coverage_log, "%s\n", file_line); 2541 fprintf(coverage_log, "%s\n", file_line);
2533 fflush(coverage_log); 2542 fflush(coverage_log);
2534 } 2543 }
2535 } 2544 }
2536 2545
2537 #endif 2546 #endif
2538 2547
2539 } } // namespace v8::internal 2548 } } // namespace v8::internal
2540 2549
2541 #endif // V8_TARGET_ARCH_IA32 2550 #endif // V8_TARGET_ARCH_IA32
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