| |
| /****************************************************************************** |
| * |
| * Module Name: exresop - AML Interpreter operand/object resolution |
| * |
| *****************************************************************************/ |
| |
| /* |
| * Copyright (C) 2000 - 2007, R. Byron Moore |
| * 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 <acpi/amlcode.h> |
| #include <acpi/acparser.h> |
| #include <acpi/acinterp.h> |
| #include <acpi/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 %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 = ACPI_GET_OBJECT_TYPE(obj_desc); |
| |
| /* Check for bad acpi_object_type */ |
| |
| if (!acpi_ut_valid_object_type(object_type)) { |
| ACPI_ERROR((AE_INFO, |
| "Bad operand object type [%X]", |
| object_type)); |
| |
| return_ACPI_STATUS(AE_AML_OPERAND_TYPE); |
| } |
| |
| if (object_type == (u8) ACPI_TYPE_LOCAL_REFERENCE) { |
| |
| /* Decode the Reference */ |
| |
| op_info = acpi_ps_get_opcode_info(opcode); |
| if (op_info->class == AML_CLASS_UNKNOWN) { |
| return_ACPI_STATUS(AE_AML_BAD_OPCODE); |
| } |
| |
| switch (obj_desc->reference.opcode) { |
| case AML_DEBUG_OP: |
| target_op = AML_DEBUG_OP; |
| |
| /*lint -fallthrough */ |
| |
| case AML_INDEX_OP: |
| case AML_REF_OF_OP: |
| case AML_ARG_OP: |
| case AML_LOCAL_OP: |
| case AML_LOAD_OP: /* ddb_handle from LOAD_OP or LOAD_TABLE_OP */ |
| case AML_INT_NAMEPATH_OP: /* Reference to a named object */ |
| |
| ACPI_DEBUG_ONLY_MEMBERS(ACPI_DEBUG_PRINT |
| ((ACPI_DB_EXEC, |
| "Operand is a Reference, RefOpcode [%s]\n", |
| (acpi_ps_get_opcode_info |
| (obj_desc-> |
| reference. |
| opcode))-> |
| name))); |
| break; |
| |
| default: |
| ACPI_ERROR((AE_INFO, |
| "Operand is a Reference, Unknown Reference Opcode: %X", |
| obj_desc->reference. |
| opcode)); |
| |
| 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) |
| && (ACPI_GET_OBJECT_TYPE(obj_desc) == |
| 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) && |
| (ACPI_GET_OBJECT_TYPE(*stack_ptr) == |
| ACPI_TYPE_LOCAL_REFERENCE) |
| && ((*stack_ptr)->reference.opcode == AML_INDEX_OP)) { |
| 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 (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
| 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 (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
| 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 (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
| 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 (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
| 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 (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
| 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 (ACPI_GET_OBJECT_TYPE(obj_desc)) { |
| 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 %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, |
| ACPI_GET_OBJECT_TYPE |
| (*stack_ptr), *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--; |
| } |
| } |
| |
| return_ACPI_STATUS(status); |
| } |