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decode: Fix erroneous decoding of high-byte regs

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This commit is contained in:
Alexis Engelke
2020-11-28 13:54:19 +01:00
parent 757acf18c3
commit 8976c7141a
2 changed files with 13 additions and 4 deletions
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16
decode.c
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@@ -605,11 +605,19 @@ prefix_end:
break;
operand->size = operand_sizes[(desc->operand_sizes >> 2 * i) & 3];
}
// if (operand->type == FD_OT_REG && operand->misc == FD_RT_GPL &&
// !(prefixes & PREFIX_REX) && operand->size == 1 && operand->reg >= 4)
if (!(prefix_rex & PREFIX_REX) && (LOAD_LE_4(operand) & 0xfffcffff) == 0x01040101)
operand->misc = FD_RT_GPH;
if (UNLIKELY(op_size == 1 || instr->type == FDI_MOVSX || instr->type == FDI_MOVZX)) {
if (!(prefix_rex & PREFIX_REX)) {
for (int i = 0; i < 2; i++) {
FdOp* operand = &instr->operands[i];
if (operand->type == FD_OT_NONE)
break;
if (operand->type == FD_OT_REG && operand->misc == FD_RT_GPL &&
operand->size == 1 && operand->reg >= 4)
operand->misc = FD_RT_GPH;
}
}
}
instr->size = off;