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| H A D | db_disasm.c | diff 238166 Fri Jul 06 12:30:51 MDT 2012 jhb Several fixes to the amd64 disassembler: - Add generic support for opcodes that are escape bytes used for multi-byte opcodes (such as the 0x0f prefix). Use this to replace the hard-coded 0x0f special case and add support for three-byte opcodes that use the 0x0f38 prefix. - Decode all Intel VMX instructions. invept and invvpid in particular are three-byte opcodes that use the 0x0f38 escape prefix. - Rework how the special 'SDEP' size flag works such that the default instruction name (i_name) is the instruction when the data size prefix (0x66) is not specified, and the alternate name in i_extra is used when the prefix is included. - Add a new 'ADEP' size flag similar to 'SDEP' except that it chooses between i_name and i_extra based on the address size prefix (0x67). Use this to fix the decoding for jrcxz vs jecxz which is determined by the address size prefix, not the operand size prefix. Also, jcxz is not possible in 64-bit mode, but jrcxz is the default instruction for that opcode. - Add support for handling instructions that have a mandatory 'rep' prefix (this means not outputting the 'repe ' prefix until determining if it is used as part of an opcode). Make 'pause' less of a special case this way. - Decode 'cmpxchg16b' and 'cdqe' which are variants of other instructions but with a REX.W prefix. MFC after: 1 month |
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