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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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| 42 UNSET_OP_ORDER = 0, | 42 UNSET_OP_ORDER = 0, |
| 43 // Operand size decides between 16, 32 and 64 bit operands. | 43 // Operand size decides between 16, 32 and 64 bit operands. |
| 44 REG_OPER_OP_ORDER = 1, // Register destination, operand source. | 44 REG_OPER_OP_ORDER = 1, // Register destination, operand source. |
| 45 OPER_REG_OP_ORDER = 2, // Operand destination, register source. | 45 OPER_REG_OP_ORDER = 2, // Operand destination, register source. |
| 46 // Fixed 8-bit operands. | 46 // Fixed 8-bit operands. |
| 47 BYTE_SIZE_OPERAND_FLAG = 4, | 47 BYTE_SIZE_OPERAND_FLAG = 4, |
| 48 BYTE_REG_OPER_OP_ORDER = REG_OPER_OP_ORDER | BYTE_SIZE_OPERAND_FLAG, | 48 BYTE_REG_OPER_OP_ORDER = REG_OPER_OP_ORDER | BYTE_SIZE_OPERAND_FLAG, |
| 49 BYTE_OPER_REG_OP_ORDER = OPER_REG_OP_ORDER | BYTE_SIZE_OPERAND_FLAG | 49 BYTE_OPER_REG_OP_ORDER = OPER_REG_OP_ORDER | BYTE_SIZE_OPERAND_FLAG |
| 50 }; | 50 }; |
| 51 | 51 |
| 52 |
| 52 //------------------------------------------------------------------ | 53 //------------------------------------------------------------------ |
| 53 // Tables | 54 // Tables |
| 54 //------------------------------------------------------------------ | 55 //------------------------------------------------------------------ |
| 55 struct ByteMnemonic { | 56 struct ByteMnemonic { |
| 56 int b; // -1 terminates, otherwise must be in range (0..255) | 57 int b; // -1 terminates, otherwise must be in range (0..255) |
| 57 OperandType op_order_; | 58 OperandType op_order_; |
| 58 const char* mnem; | 59 const char* mnem; |
| 59 }; | 60 }; |
| 60 | 61 |
| 61 | 62 |
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| 286 {"cmovs", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, | 287 {"cmovs", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 287 {"cmovns", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, | 288 {"cmovns", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 288 {"cmovpe", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, | 289 {"cmovpe", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 289 {"cmovpo", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, | 290 {"cmovpo", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 290 {"cmovl", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, | 291 {"cmovl", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 291 {"cmovge", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, | 292 {"cmovge", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 292 {"cmovle", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, | 293 {"cmovle", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false}, |
| 293 {"cmovg", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false} | 294 {"cmovg", TWO_OPERANDS_INSTR, REG_OPER_OP_ORDER, false} |
| 294 }; | 295 }; |
| 295 | 296 |
| 297 |
| 296 //------------------------------------------------------------------------------ | 298 //------------------------------------------------------------------------------ |
| 297 // DisassemblerX64 implementation. | 299 // DisassemblerX64 implementation. |
| 298 | 300 |
| 299 enum UnimplementedOpcodeAction { | 301 enum UnimplementedOpcodeAction { |
| 300 CONTINUE_ON_UNIMPLEMENTED_OPCODE, | 302 CONTINUE_ON_UNIMPLEMENTED_OPCODE, |
| 301 ABORT_ON_UNIMPLEMENTED_OPCODE | 303 ABORT_ON_UNIMPLEMENTED_OPCODE |
| 302 }; | 304 }; |
| 303 | 305 |
| 306 |
| 304 // A new DisassemblerX64 object is created to disassemble each instruction. | 307 // A new DisassemblerX64 object is created to disassemble each instruction. |
| 305 // The object can only disassemble a single instruction. | 308 // The object can only disassemble a single instruction. |
| 306 class DisassemblerX64 { | 309 class DisassemblerX64 { |
| 307 public: | 310 public: |
| 308 DisassemblerX64(const NameConverter& converter, | 311 DisassemblerX64(const NameConverter& converter, |
| 309 UnimplementedOpcodeAction unimplemented_action = | 312 UnimplementedOpcodeAction unimplemented_action = |
| 310 ABORT_ON_UNIMPLEMENTED_OPCODE) | 313 ABORT_ON_UNIMPLEMENTED_OPCODE) |
| 311 : converter_(converter), | 314 : converter_(converter), |
| 312 tmp_buffer_pos_(0), | 315 tmp_buffer_pos_(0), |
| 313 abort_on_unimplemented_( | 316 abort_on_unimplemented_( |
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| 1756 } | 1759 } |
| 1757 for (int i = 6 - instr_len; i >= 0; i--) { | 1760 for (int i = 6 - instr_len; i >= 0; i--) { |
| 1758 outp += v8::internal::OS::SNPrintF(out_buffer + outp, " "); | 1761 outp += v8::internal::OS::SNPrintF(out_buffer + outp, " "); |
| 1759 } | 1762 } |
| 1760 | 1763 |
| 1761 outp += v8::internal::OS::SNPrintF(out_buffer + outp, " %s", | 1764 outp += v8::internal::OS::SNPrintF(out_buffer + outp, " %s", |
| 1762 tmp_buffer_.start()); | 1765 tmp_buffer_.start()); |
| 1763 return instr_len; | 1766 return instr_len; |
| 1764 } | 1767 } |
| 1765 | 1768 |
| 1769 |
| 1766 //------------------------------------------------------------------------------ | 1770 //------------------------------------------------------------------------------ |
| 1767 | 1771 |
| 1768 | 1772 |
| 1769 static const char* cpu_regs[16] = { | 1773 static const char* cpu_regs[16] = { |
| 1770 "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", | 1774 "rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", |
| 1771 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" | 1775 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15" |
| 1772 }; | 1776 }; |
| 1773 | 1777 |
| 1774 | 1778 |
| 1775 static const char* byte_cpu_regs[16] = { | 1779 static const char* byte_cpu_regs[16] = { |
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| 1815 return "noxmmreg"; | 1819 return "noxmmreg"; |
| 1816 } | 1820 } |
| 1817 | 1821 |
| 1818 | 1822 |
| 1819 const char* NameConverter::NameInCode(byte* addr) const { | 1823 const char* NameConverter::NameInCode(byte* addr) const { |
| 1820 // X64 does not embed debug strings at the moment. | 1824 // X64 does not embed debug strings at the moment. |
| 1821 UNREACHABLE(); | 1825 UNREACHABLE(); |
| 1822 return ""; | 1826 return ""; |
| 1823 } | 1827 } |
| 1824 | 1828 |
| 1829 |
| 1825 //------------------------------------------------------------------------------ | 1830 //------------------------------------------------------------------------------ |
| 1826 | 1831 |
| 1827 Disassembler::Disassembler(const NameConverter& converter) | 1832 Disassembler::Disassembler(const NameConverter& converter) |
| 1828 : converter_(converter) { } | 1833 : converter_(converter) { } |
| 1829 | 1834 |
| 1830 Disassembler::~Disassembler() { } | 1835 Disassembler::~Disassembler() { } |
| 1831 | 1836 |
| 1832 | 1837 |
| 1833 int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, | 1838 int Disassembler::InstructionDecode(v8::internal::Vector<char> buffer, |
| 1834 byte* instruction) { | 1839 byte* instruction) { |
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| 1860 for (int i = 6 - static_cast<int>(pc - prev_pc); i >= 0; i--) { | 1865 for (int i = 6 - static_cast<int>(pc - prev_pc); i >= 0; i--) { |
| 1861 fprintf(f, " "); | 1866 fprintf(f, " "); |
| 1862 } | 1867 } |
| 1863 fprintf(f, " %s\n", buffer.start()); | 1868 fprintf(f, " %s\n", buffer.start()); |
| 1864 } | 1869 } |
| 1865 } | 1870 } |
| 1866 | 1871 |
| 1867 } // namespace disasm | 1872 } // namespace disasm |
| 1868 | 1873 |
| 1869 #endif // V8_TARGET_ARCH_X64 | 1874 #endif // V8_TARGET_ARCH_X64 |
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