/****************************************************************************** * * Module Name: exresop - AML Interpreter operand/object resolution * *****************************************************************************/ /* * Copyright (C) 2000 - 2011, Intel Corp. * All rights reserved. * * Redistribution and use in source and binary forms, with or without * modification, are permitted provided that the following conditions * are met: * 1. Redistributions of source code must retain the above copyright * notice, this list of conditions, and the following disclaimer, * without modification. * 2. Redistributions in binary form must reproduce at minimum a disclaimer * substantially similar to the "NO WARRANTY" disclaimer below * ("Disclaimer") and any redistribution must be conditioned upon * including a substantially similar Disclaimer requirement for further * binary redistribution. * 3. Neither the names of the above-listed copyright holders nor the names * of any contributors may be used to endorse or promote products derived * from this software without specific prior written permission. * * Alternatively, this software may be distributed under the terms of the * GNU General Public License ("GPL") version 2 as published by the Free * Software Foundation. * * NO WARRANTY * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT * HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING * IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE * POSSIBILITY OF SUCH DAMAGES. */ #include <acpi/acpi.h> #include "accommon.h" #include "amlcode.h" #include "acparser.h" #include "acinterp.h" #include "acnamesp.h" #define _COMPONENT ACPI_EXECUTER ACPI_MODULE_NAME("exresop") /* Local prototypes */ static acpi_status acpi_ex_check_object_type(acpi_object_type type_needed, acpi_object_type this_type, void *object); /******************************************************************************* * * FUNCTION: acpi_ex_check_object_type * * PARAMETERS: type_needed Object type needed * this_type Actual object type * Object Object pointer * * RETURN: Status * * DESCRIPTION: Check required type against actual type * ******************************************************************************/ static acpi_status acpi_ex_check_object_type(acpi_object_type type_needed, acpi_object_type this_type, void *object) { ACPI_FUNCTION_ENTRY(); if (type_needed == ACPI_TYPE_ANY) { /* All types OK, so we don't perform any typechecks */ return (AE_OK); } if (type_needed == ACPI_TYPE_LOCAL_REFERENCE) { /* * Allow the AML "Constant" opcodes (Zero, One, etc.) to be reference * objects and thus allow them to be targets. (As per the ACPI * specification, a store to a constant is a noop.) */ if ((this_type == ACPI_TYPE_INTEGER) && (((union acpi_operand_object *)object)->common. flags & AOPOBJ_AML_CONSTANT)) { return (AE_OK); } } if (type_needed != this_type) { ACPI_ERROR((AE_INFO, "Needed type [%s], found [%s] %p", acpi_ut_get_type_name(type_needed), acpi_ut_get_type_name(this_type), object)); return (AE_AML_OPERAND_TYPE); } return (AE_OK); } /******************************************************************************* * * FUNCTION: acpi_ex_resolve_operands * * PARAMETERS: Opcode - Opcode being interpreted * stack_ptr - Pointer to the operand stack to be * resolved * walk_state - Current state * * RETURN: Status * * DESCRIPTION: Convert multiple input operands to the types required by the * target operator. * * Each 5-bit group in arg_types represents one required * operand and indicates the required Type. The corresponding operand * will be converted to the required type if possible, otherwise we * abort with an exception. * ******************************************************************************/ acpi_status acpi_ex_resolve_operands(u16 opcode, union acpi_operand_object ** stack_ptr, struct acpi_walk_state * walk_state) { union acpi_operand_object *obj_desc; acpi_status status = AE_OK; u8 object_type; u32 arg_types; const struct acpi_opcode_info *op_info; u32 this_arg_type; acpi_object_type type_needed; u16 target_op = 0; ACPI_FUNCTION_TRACE_U32(ex_resolve_operands, opcode); op_info = acpi_ps_get_opcode_info(opcode); if (op_info->class == AML_CLASS_UNKNOWN) { return_ACPI_STATUS(AE_AML_BAD_OPCODE); } arg_types = op_info->runtime_args; if (arg_types == ARGI_INVALID_OPCODE) { ACPI_ERROR((AE_INFO, "Unknown AML opcode 0x%X", opcode)); return_ACPI_STATUS(AE_AML_INTERNAL); } ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Opcode %X [%s] RequiredOperandTypes=%8.8X\n", opcode, op_info->name, arg_types)); /* * Normal exit is with (arg_types == 0) at end of argument list. * Function will return an exception from within the loop upon * finding an entry which is not (or cannot be converted * to) the required type; if stack underflows; or upon * finding a NULL stack entry (which should not happen). */ while (GET_CURRENT_ARG_TYPE(arg_types)) { if (!stack_ptr || !*stack_ptr) { ACPI_ERROR((AE_INFO, "Null stack entry at %p", stack_ptr)); return_ACPI_STATUS(AE_AML_INTERNAL); } /* Extract useful items */ obj_desc = *stack_ptr; /* Decode the descriptor type */ switch (ACPI_GET_DESCRIPTOR_TYPE(obj_desc)) { case ACPI_DESC_TYPE_NAMED: /* Namespace Node */ object_type = ((struct acpi_namespace_node *)obj_desc)->type; /* * Resolve an alias object. The construction of these objects * guarantees that there is only one level of alias indirection; * thus, the attached object is always the aliased namespace node */ if (object_type == ACPI_TYPE_LOCAL_ALIAS) { obj_desc = acpi_ns_get_attached_object((struct acpi_namespace_node *)obj_desc); *stack_ptr = obj_desc; object_type = ((struct acpi_namespace_node *)obj_desc)-> type; } break; case ACPI_DESC_TYPE_OPERAND: /* ACPI internal object */ object_type = obj_desc->common.type; /* Check for bad acpi_object_type */ if (!acpi_ut_valid_object_type(object_type)) { ACPI_ERROR((AE_INFO, "Bad operand object type [0x%X]", object_type)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) { /* Validate the Reference */ switch (obj_desc->reference.class) { case ACPI_REFCLASS_DEBUG: target_op = AML_DEBUG_OP; /*lint -fallthrough */ case ACPI_REFCLASS_ARG: case ACPI_REFCLASS_LOCAL: case ACPI_REFCLASS_INDEX: case ACPI_REFCLASS_REFOF: case ACPI_REFCLASS_TABLE: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */ case ACPI_REFCLASS_NAME: /* Reference to a named object */ ACPI_DEBUG_PRINT((ACPI_DB_EXEC, "Operand is a Reference, Class [%s] %2.2X\n", acpi_ut_get_reference_name (obj_desc), obj_desc->reference. class)); break; default: ACPI_ERROR((AE_INFO, "Unknown Reference Class 0x%2.2X in %p", obj_desc->reference.class, obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } } break; default: /* Invalid descriptor */ ACPI_ERROR((AE_INFO, "Invalid descriptor %p [%s]", obj_desc, acpi_ut_get_descriptor_name(obj_desc))); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } /* Get one argument type, point to the next */ this_arg_type = GET_CURRENT_ARG_TYPE(arg_types); INCREMENT_ARG_LIST(arg_types); /* * Handle cases where the object does not need to be * resolved to a value */ switch (this_arg_type) { case ARGI_REF_OR_STRING: /* Can be a String or Reference */ if ((ACPI_GET_DESCRIPTOR_TYPE(obj_desc) == ACPI_DESC_TYPE_OPERAND) && (obj_desc->common.type == ACPI_TYPE_STRING)) { /* * String found - the string references a named object and * must be resolved to a node */ goto next_operand; } /* * Else not a string - fall through to the normal Reference * case below */ /*lint -fallthrough */ case ARGI_REFERENCE: /* References: */ case ARGI_INTEGER_REF: case ARGI_OBJECT_REF: case ARGI_DEVICE_REF: case ARGI_TARGETREF: /* Allows implicit conversion rules before store */ case ARGI_FIXED_TARGET: /* No implicit conversion before store to target */ case ARGI_SIMPLE_TARGET: /* Name, Local, or Arg - no implicit conversion */ /* * Need an operand of type ACPI_TYPE_LOCAL_REFERENCE * A Namespace Node is OK as-is */ if (ACPI_GET_DESCRIPTOR_TYPE(obj_desc) == ACPI_DESC_TYPE_NAMED) { goto next_operand; } status = acpi_ex_check_object_type(ACPI_TYPE_LOCAL_REFERENCE, object_type, obj_desc); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } goto next_operand; case ARGI_DATAREFOBJ: /* Store operator only */ /* * We don't want to resolve index_op reference objects during * a store because this would be an implicit de_ref_of operation. * Instead, we just want to store the reference object. * -- All others must be resolved below. */ if ((opcode == AML_STORE_OP) && ((*stack_ptr)->common.type == ACPI_TYPE_LOCAL_REFERENCE) && ((*stack_ptr)->reference.class == ACPI_REFCLASS_INDEX)) { goto next_operand; } break; default: /* All cases covered above */ break; } /* * Resolve this object to a value */ status = acpi_ex_resolve_to_value(stack_ptr, walk_state); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } /* Get the resolved object */ obj_desc = *stack_ptr; /* * Check the resulting object (value) type */ switch (this_arg_type) { /* * For the simple cases, only one type of resolved object * is allowed */ case ARGI_MUTEX: /* Need an operand of type ACPI_TYPE_MUTEX */ type_needed = ACPI_TYPE_MUTEX; break; case ARGI_EVENT: /* Need an operand of type ACPI_TYPE_EVENT */ type_needed = ACPI_TYPE_EVENT; break; case ARGI_PACKAGE: /* Package */ /* Need an operand of type ACPI_TYPE_PACKAGE */ type_needed = ACPI_TYPE_PACKAGE; break; case ARGI_ANYTYPE: /* Any operand type will do */ type_needed = ACPI_TYPE_ANY; break; case ARGI_DDBHANDLE: /* Need an operand of type ACPI_TYPE_DDB_HANDLE */ type_needed = ACPI_TYPE_LOCAL_REFERENCE; break; /* * The more complex cases allow multiple resolved object types */ case ARGI_INTEGER: /* * Need an operand of type ACPI_TYPE_INTEGER, * But we can implicitly convert from a STRING or BUFFER * Aka - "Implicit Source Operand Conversion" */ status = acpi_ex_convert_to_integer(obj_desc, stack_ptr, 16); if (ACPI_FAILURE(status)) { if (status == AE_TYPE) { ACPI_ERROR((AE_INFO, "Needed [Integer/String/Buffer], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } return_ACPI_STATUS(status); } if (obj_desc != *stack_ptr) { acpi_ut_remove_reference(obj_desc); } goto next_operand; case ARGI_BUFFER: /* * Need an operand of type ACPI_TYPE_BUFFER, * But we can implicitly convert from a STRING or INTEGER * Aka - "Implicit Source Operand Conversion" */ status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr); if (ACPI_FAILURE(status)) { if (status == AE_TYPE) { ACPI_ERROR((AE_INFO, "Needed [Integer/String/Buffer], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } return_ACPI_STATUS(status); } if (obj_desc != *stack_ptr) { acpi_ut_remove_reference(obj_desc); } goto next_operand; case ARGI_STRING: /* * Need an operand of type ACPI_TYPE_STRING, * But we can implicitly convert from a BUFFER or INTEGER * Aka - "Implicit Source Operand Conversion" */ status = acpi_ex_convert_to_string(obj_desc, stack_ptr, ACPI_IMPLICIT_CONVERT_HEX); if (ACPI_FAILURE(status)) { if (status == AE_TYPE) { ACPI_ERROR((AE_INFO, "Needed [Integer/String/Buffer], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } return_ACPI_STATUS(status); } if (obj_desc != *stack_ptr) { acpi_ut_remove_reference(obj_desc); } goto next_operand; case ARGI_COMPUTEDATA: /* Need an operand of type INTEGER, STRING or BUFFER */ switch (obj_desc->common.type) { case ACPI_TYPE_INTEGER: case ACPI_TYPE_STRING: case ACPI_TYPE_BUFFER: /* Valid operand */ break; default: ACPI_ERROR((AE_INFO, "Needed [Integer/String/Buffer], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } goto next_operand; case ARGI_BUFFER_OR_STRING: /* Need an operand of type STRING or BUFFER */ switch (obj_desc->common.type) { case ACPI_TYPE_STRING: case ACPI_TYPE_BUFFER: /* Valid operand */ break; case ACPI_TYPE_INTEGER: /* Highest priority conversion is to type Buffer */ status = acpi_ex_convert_to_buffer(obj_desc, stack_ptr); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } if (obj_desc != *stack_ptr) { acpi_ut_remove_reference(obj_desc); } break; default: ACPI_ERROR((AE_INFO, "Needed [Integer/String/Buffer], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } goto next_operand; case ARGI_DATAOBJECT: /* * ARGI_DATAOBJECT is only used by the size_of operator. * Need a buffer, string, package, or ref_of reference. * * The only reference allowed here is a direct reference to * a namespace node. */ switch (obj_desc->common.type) { case ACPI_TYPE_PACKAGE: case ACPI_TYPE_STRING: case ACPI_TYPE_BUFFER: case ACPI_TYPE_LOCAL_REFERENCE: /* Valid operand */ break; default: ACPI_ERROR((AE_INFO, "Needed [Buffer/String/Package/Reference], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } goto next_operand; case ARGI_COMPLEXOBJ: /* Need a buffer or package or (ACPI 2.0) String */ switch (obj_desc->common.type) { case ACPI_TYPE_PACKAGE: case ACPI_TYPE_STRING: case ACPI_TYPE_BUFFER: /* Valid operand */ break; default: ACPI_ERROR((AE_INFO, "Needed [Buffer/String/Package], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } goto next_operand; case ARGI_REGION_OR_BUFFER: /* Used by Load() only */ /* Need an operand of type REGION or a BUFFER (which could be a resolved region field) */ switch (obj_desc->common.type) { case ACPI_TYPE_BUFFER: case ACPI_TYPE_REGION: /* Valid operand */ break; default: ACPI_ERROR((AE_INFO, "Needed [Region/Buffer], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } goto next_operand; case ARGI_DATAREFOBJ: /* Used by the Store() operator only */ switch (obj_desc->common.type) { case ACPI_TYPE_INTEGER: case ACPI_TYPE_PACKAGE: case ACPI_TYPE_STRING: case ACPI_TYPE_BUFFER: case ACPI_TYPE_BUFFER_FIELD: case ACPI_TYPE_LOCAL_REFERENCE: case ACPI_TYPE_LOCAL_REGION_FIELD: case ACPI_TYPE_LOCAL_BANK_FIELD: case ACPI_TYPE_LOCAL_INDEX_FIELD: case ACPI_TYPE_DDB_HANDLE: /* Valid operand */ break; default: if (acpi_gbl_enable_interpreter_slack) { /* * Enable original behavior of Store(), allowing any and all * objects as the source operand. The ACPI spec does not * allow this, however. */ break; } if (target_op == AML_DEBUG_OP) { /* Allow store of any object to the Debug object */ break; } ACPI_ERROR((AE_INFO, "Needed Integer/Buffer/String/Package/Ref/Ddb], found [%s] %p", acpi_ut_get_object_type_name (obj_desc), obj_desc)); return_ACPI_STATUS(AE_AML_OPERAND_TYPE); } goto next_operand; default: /* Unknown type */ ACPI_ERROR((AE_INFO, "Internal - Unknown ARGI (required operand) type 0x%X", this_arg_type)); return_ACPI_STATUS(AE_BAD_PARAMETER); } /* * Make sure that the original object was resolved to the * required object type (Simple cases only). */ status = acpi_ex_check_object_type(type_needed, (*stack_ptr)->common.type, *stack_ptr); if (ACPI_FAILURE(status)) { return_ACPI_STATUS(status); } next_operand: /* * If more operands needed, decrement stack_ptr to point * to next operand on stack */ if (GET_CURRENT_ARG_TYPE(arg_types)) { stack_ptr--; } } ACPI_DUMP_OPERANDS(walk_state->operands, acpi_ps_get_opcode_name(opcode), walk_state->num_operands); return_ACPI_STATUS(status); }