ACPI_STATUS AcpiDsEvaluateNamePath ( ACPI_WALK_STATE *WalkState) { ACPI_STATUS Status = AE_OK; ACPI_PARSE_OBJECT *Op = WalkState->Op; ACPI_OPERAND_OBJECT **Operand = &WalkState->Operands[0]; ACPI_OPERAND_OBJECT *NewObjDesc; UINT8 Type; ACPI_FUNCTION_TRACE_PTR (DsEvaluateNamePath, WalkState); if (!Op->Common.Parent) { /* This happens after certain exception processing */ goto Exit; } if ((Op->Common.Parent->Common.AmlOpcode == AML_PACKAGE_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_VAR_PACKAGE_OP) || (Op->Common.Parent->Common.AmlOpcode == AML_REF_OF_OP)) { /* TBD: Should we specify this feature as a bit of OpInfo->Flags of these opcodes? */ goto Exit; } Status = AcpiDsCreateOperand (WalkState, Op, 0); if (ACPI_FAILURE (Status)) { goto Exit; } if (Op->Common.Flags & ACPI_PARSEOP_TARGET) { NewObjDesc = *Operand; goto PushResult; } Type = (*Operand)->Common.Type; Status = AcpiExResolveToValue (Operand, WalkState); if (ACPI_FAILURE (Status)) { goto Exit; } if (Type == ACPI_TYPE_INTEGER) { /* It was incremented by AcpiExResolveToValue */ AcpiUtRemoveReference (*Operand); Status = AcpiUtCopyIobjectToIobject (*Operand, &NewObjDesc, WalkState); if (ACPI_FAILURE (Status)) { goto Exit; } } else { /* * The object either was anew created or is * a Namespace node - don't decrement it. */ NewObjDesc = *Operand; } /* Cleanup for name-path operand */ Status = AcpiDsObjStackPop (1, WalkState); if (ACPI_FAILURE (Status)) { WalkState->ResultObj = NewObjDesc; goto Exit; } PushResult: WalkState->ResultObj = NewObjDesc; Status = AcpiDsResultPush (WalkState->ResultObj, WalkState); if (ACPI_SUCCESS (Status)) { /* Force to take it from stack */ Op->Common.Flags |= ACPI_PARSEOP_IN_STACK; } Exit: return_ACPI_STATUS (Status); }
ACPI_STATUS AcpiDsEvalDataObjectOperands ( ACPI_WALK_STATE *WalkState, ACPI_PARSE_OBJECT *Op, ACPI_OPERAND_OBJECT *ObjDesc) { ACPI_STATUS Status; ACPI_OPERAND_OBJECT *ArgDesc; UINT32 Length; ACPI_FUNCTION_TRACE (DsEvalDataObjectOperands); /* The first operand (for all of these data objects) is the length */ /* * Set proper index into operand stack for AcpiDsObjStackPush * invoked inside AcpiDsCreateOperand. */ WalkState->OperandIndex = WalkState->NumOperands; Status = AcpiDsCreateOperand (WalkState, Op->Common.Value.Arg, 1); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } Status = AcpiExResolveOperands (WalkState->Opcode, &(WalkState->Operands [WalkState->NumOperands -1]), WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Extract length operand */ ArgDesc = WalkState->Operands [WalkState->NumOperands - 1]; Length = (UINT32) ArgDesc->Integer.Value; /* Cleanup for length operand */ Status = AcpiDsObjStackPop (1, WalkState); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } AcpiUtRemoveReference (ArgDesc); /* * Create the actual data object */ switch (Op->Common.AmlOpcode) { case AML_BUFFER_OP: Status = AcpiDsBuildInternalBufferObj (WalkState, Op, Length, &ObjDesc); break; case AML_PACKAGE_OP: case AML_VAR_PACKAGE_OP: Status = AcpiDsBuildInternalPackageObj (WalkState, Op, Length, &ObjDesc); break; default: return_ACPI_STATUS (AE_AML_BAD_OPCODE); } if (ACPI_SUCCESS (Status)) { /* * Return the object in the WalkState, unless the parent is a package - * in this case, the return object will be stored in the parse tree * for the package. */ if ((!Op->Common.Parent) || ((Op->Common.Parent->Common.AmlOpcode != AML_PACKAGE_OP) && (Op->Common.Parent->Common.AmlOpcode != AML_VAR_PACKAGE_OP) && (Op->Common.Parent->Common.AmlOpcode != AML_NAME_OP))) { WalkState->ResultObj = ObjDesc; } } return_ACPI_STATUS (Status); }