| // SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0 |
| /****************************************************************************** |
| * |
| * Module Name: exresop - AML Interpreter operand/object resolution |
| * |
| * Copyright (C) 2000 - 2022, Intel Corp. |
| * |
| *****************************************************************************/ |
| |
| #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; |
| |
| ACPI_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 |
| */ |
| ACPI_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 */ |
| case ARGI_STORE_TARGET: |
| |
| /* |
| * 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. |
| * |
| * Known as "Implicit Source Operand Conversion" |
| */ |
| status = acpi_ex_convert_to_integer(obj_desc, stack_ptr, |
| ACPI_IMPLICIT_CONVERSION); |
| 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); |
| } |