ACPI_STATUS AcpiDsRestartControlMethod ( ACPI_WALK_STATE *WalkState, ACPI_OPERAND_OBJECT *ReturnDesc) { ACPI_STATUS Status; int SameAsImplicitReturn; ACPI_FUNCTION_TRACE_PTR (DsRestartControlMethod, WalkState); ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "****Restart [%4.4s] Op %p ReturnValueFromCallee %p\n", AcpiUtGetNodeName (WalkState->MethodNode), WalkState->MethodCallOp, ReturnDesc)); ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, " ReturnFromThisMethodUsed?=%X ResStack %p Walk %p\n", WalkState->ReturnUsed, WalkState->Results, WalkState)); /* Did the called method return a value? */ if (ReturnDesc) { /* Is the implicit return object the same as the return desc? */ SameAsImplicitReturn = (WalkState->ImplicitReturnObj == ReturnDesc); /* Are we actually going to use the return value? */ if (WalkState->ReturnUsed) { /* Save the return value from the previous method */ Status = AcpiDsResultPush (ReturnDesc, WalkState); if (ACPI_FAILURE (Status)) { AcpiUtRemoveReference (ReturnDesc); return_ACPI_STATUS (Status); } /* * Save as THIS method's return value in case it is returned * immediately to yet another method */ WalkState->ReturnDesc = ReturnDesc; } /* * The following code is the optional support for the so-called * "implicit return". Some AML code assumes that the last value of the * method is "implicitly" returned to the caller, in the absence of an * explicit return value. * * Just save the last result of the method as the return value. * * NOTE: this is optional because the ASL language does not actually * support this behavior. */ else if (!AcpiDsDoImplicitReturn (ReturnDesc, WalkState, FALSE) || SameAsImplicitReturn) { /* * Delete the return value if it will not be used by the * calling method or remove one reference if the explicit return * is the same as the implicit return value. */ AcpiUtRemoveReference (ReturnDesc); } } return_ACPI_STATUS (AE_OK); }
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 AcpiDsExecEndOp ( ACPI_WALK_STATE *WalkState) { ACPI_PARSE_OBJECT *Op; ACPI_STATUS Status = AE_OK; UINT32 OpType; UINT32 OpClass; ACPI_PARSE_OBJECT *NextOp; ACPI_PARSE_OBJECT *FirstArg; ACPI_FUNCTION_TRACE_PTR (DsExecEndOp, WalkState); Op = WalkState->Op; OpType = WalkState->OpInfo->Type; OpClass = WalkState->OpInfo->Class; if (OpClass == AML_CLASS_UNKNOWN) { ACPI_ERROR ((AE_INFO, "Unknown opcode 0x%X", Op->Common.AmlOpcode)); return_ACPI_STATUS (AE_NOT_IMPLEMENTED); } FirstArg = Op->Common.Value.Arg; /* Init the walk state */ WalkState->NumOperands = 0; WalkState->OperandIndex = 0; WalkState->ReturnDesc = NULL; WalkState->ResultObj = NULL; /* Call debugger for single step support (DEBUG build only) */ Status = AcpiDbSingleStep (WalkState, Op, OpClass); if (ACPI_FAILURE (Status)) { return_ACPI_STATUS (Status); } /* Decode the Opcode Class */ switch (OpClass) { case AML_CLASS_ARGUMENT: /* Constants, literals, etc. */ if (WalkState->Opcode == AML_INT_NAMEPATH_OP) { Status = AcpiDsEvaluateNamePath (WalkState); if (ACPI_FAILURE (Status)) { goto Cleanup; } } break; case AML_CLASS_EXECUTE: /* Most operators with arguments */ /* Build resolved operand stack */ Status = AcpiDsCreateOperands (WalkState, FirstArg); if (ACPI_FAILURE (Status)) { goto Cleanup; } /* * All opcodes require operand resolution, with the only exceptions * being the ObjectType and SizeOf operators. */ if (!(WalkState->OpInfo->Flags & AML_NO_OPERAND_RESOLVE)) { /* Resolve all operands */ Status = AcpiExResolveOperands (WalkState->Opcode, &(WalkState->Operands [WalkState->NumOperands -1]), WalkState); } if (ACPI_SUCCESS (Status)) { /* * Dispatch the request to the appropriate interpreter handler * routine. There is one routine per opcode "type" based upon the * number of opcode arguments and return type. */ Status = AcpiGbl_OpTypeDispatch[OpType] (WalkState); } else { /* * Treat constructs of the form "Store(LocalX,LocalX)" as noops when the * Local is uninitialized. */ if ((Status == AE_AML_UNINITIALIZED_LOCAL) && (WalkState->Opcode == AML_STORE_OP) && (WalkState->Operands[0]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) && (WalkState->Operands[1]->Common.Type == ACPI_TYPE_LOCAL_REFERENCE) && (WalkState->Operands[0]->Reference.Class == WalkState->Operands[1]->Reference.Class) && (WalkState->Operands[0]->Reference.Value == WalkState->Operands[1]->Reference.Value)) { Status = AE_OK; } else { ACPI_EXCEPTION ((AE_INFO, Status, "While resolving operands for [%s]", AcpiPsGetOpcodeName (WalkState->Opcode))); } } /* Always delete the argument objects and clear the operand stack */ AcpiDsClearOperands (WalkState); /* * If a result object was returned from above, push it on the * current result stack */ if (ACPI_SUCCESS (Status) && WalkState->ResultObj) { Status = AcpiDsResultPush (WalkState->ResultObj, WalkState); } break; default: switch (OpType) { case AML_TYPE_CONTROL: /* Type 1 opcode, IF/ELSE/WHILE/NOOP */ /* 1 Operand, 0 ExternalResult, 0 InternalResult */ Status = AcpiDsExecEndControlOp (WalkState, Op); break; case AML_TYPE_METHOD_CALL: /* * If the method is referenced from within a package * declaration, it is not a invocation of the method, just * a reference to it. */ if ((Op->Asl.Parent) && ((Op->Asl.Parent->Asl.AmlOpcode == AML_PACKAGE_OP) || (Op->Asl.Parent->Asl.AmlOpcode == AML_VAR_PACKAGE_OP))) { ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method Reference in a Package, Op=%p\n", Op)); Op->Common.Node = (ACPI_NAMESPACE_NODE *) Op->Asl.Value.Arg->Asl.Node; AcpiUtAddReference (Op->Asl.Value.Arg->Asl.Node->Object); return_ACPI_STATUS (AE_OK); } ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Method invocation, Op=%p\n", Op)); /* * (AML_METHODCALL) Op->Asl.Value.Arg->Asl.Node contains * the method Node pointer */ /* NextOp points to the op that holds the method name */ NextOp = FirstArg; /* NextOp points to first argument op */ NextOp = NextOp->Common.Next; /* * Get the method's arguments and put them on the operand stack */ Status = AcpiDsCreateOperands (WalkState, NextOp); if (ACPI_FAILURE (Status)) { break; } /* * Since the operands will be passed to another control method, * we must resolve all local references here (Local variables, * arguments to *this* method, etc.) */ Status = AcpiDsResolveOperands (WalkState); if (ACPI_FAILURE (Status)) { /* On error, clear all resolved operands */ AcpiDsClearOperands (WalkState); break; } /* * Tell the walk loop to preempt this running method and * execute the new method */ Status = AE_CTRL_TRANSFER; /* * Return now; we don't want to disturb anything, * especially the operand count! */ return_ACPI_STATUS (Status); case AML_TYPE_CREATE_FIELD: ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Executing CreateField Buffer/Index Op=%p\n", Op)); Status = AcpiDsLoad2EndOp (WalkState); if (ACPI_FAILURE (Status)) { break; } Status = AcpiDsEvalBufferFieldOperands (WalkState, Op); break; case AML_TYPE_CREATE_OBJECT: ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Executing CreateObject (Buffer/Package) Op=%p\n", Op)); switch (Op->Common.Parent->Common.AmlOpcode) { case AML_NAME_OP: /* * Put the Node on the object stack (Contains the ACPI Name * of this object) */ WalkState->Operands[0] = (void *) Op->Common.Parent->Common.Node; WalkState->NumOperands = 1; Status = AcpiDsCreateNode (WalkState, Op->Common.Parent->Common.Node, Op->Common.Parent); if (ACPI_FAILURE (Status)) { break; } /* Fall through */ /*lint -fallthrough */ case AML_INT_EVAL_SUBTREE_OP: Status = AcpiDsEvalDataObjectOperands (WalkState, Op, AcpiNsGetAttachedObject (Op->Common.Parent->Common.Node)); break; default: Status = AcpiDsEvalDataObjectOperands (WalkState, Op, NULL); break; } /* * If a result object was returned from above, push it on the * current result stack */ if (WalkState->ResultObj) { Status = AcpiDsResultPush (WalkState->ResultObj, WalkState); } break; case AML_TYPE_NAMED_FIELD: case AML_TYPE_NAMED_COMPLEX: case AML_TYPE_NAMED_SIMPLE: case AML_TYPE_NAMED_NO_OBJ: Status = AcpiDsLoad2EndOp (WalkState); if (ACPI_FAILURE (Status)) { break; } if (Op->Common.AmlOpcode == AML_REGION_OP) { ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Executing OpRegion Address/Length Op=%p\n", Op)); Status = AcpiDsEvalRegionOperands (WalkState, Op); if (ACPI_FAILURE (Status)) { break; } } else if (Op->Common.AmlOpcode == AML_DATA_REGION_OP) { ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Executing DataTableRegion Strings Op=%p\n", Op)); Status = AcpiDsEvalTableRegionOperands (WalkState, Op); if (ACPI_FAILURE (Status)) { break; } } else if (Op->Common.AmlOpcode == AML_BANK_FIELD_OP) { ACPI_DEBUG_PRINT ((ACPI_DB_EXEC, "Executing BankField Op=%p\n", Op)); Status = AcpiDsEvalBankFieldOperands (WalkState, Op); if (ACPI_FAILURE (Status)) { break; } } break; case AML_TYPE_UNDEFINED: ACPI_ERROR ((AE_INFO, "Undefined opcode type Op=%p", Op)); return_ACPI_STATUS (AE_NOT_IMPLEMENTED); case AML_TYPE_BOGUS: ACPI_DEBUG_PRINT ((ACPI_DB_DISPATCH, "Internal opcode=%X type Op=%p\n", WalkState->Opcode, Op)); break; default: ACPI_ERROR ((AE_INFO, "Unimplemented opcode, class=0x%X " "type=0x%X Opcode=0x%X Op=%p", OpClass, OpType, Op->Common.AmlOpcode, Op)); Status = AE_NOT_IMPLEMENTED; break; } } /* * ACPI 2.0 support for 64-bit integers: Truncate numeric * result value if we are executing from a 32-bit ACPI table */ (void) AcpiExTruncateFor32bitTable (WalkState->ResultObj); /* * Check if we just completed the evaluation of a * conditional predicate */ if ((ACPI_SUCCESS (Status)) && (WalkState->ControlState) && (WalkState->ControlState->Common.State == ACPI_CONTROL_PREDICATE_EXECUTING) && (WalkState->ControlState->Control.PredicateOp == Op)) { Status = AcpiDsGetPredicateValue (WalkState, WalkState->ResultObj); WalkState->ResultObj = NULL; } Cleanup: if (WalkState->ResultObj) { /* Break to debugger to display result */ AcpiDbDisplayResultObject (WalkState->ResultObj,WalkState); /* * Delete the result op if and only if: * Parent will not use the result -- such as any * non-nested type2 op in a method (parent will be method) */ AcpiDsDeleteResultIfNotUsed (Op, WalkState->ResultObj, WalkState); } #ifdef _UNDER_DEVELOPMENT if (WalkState->ParserState.Aml == WalkState->ParserState.AmlEnd) { AcpiDbMethodEnd (WalkState); } #endif /* Invoke exception handler on error */ if (ACPI_FAILURE (Status)) { Status = AcpiDsMethodError (Status, WalkState); } /* Always clear the object stack */ WalkState->NumOperands = 0; return_ACPI_STATUS (Status); }