--- /dev/null
+/******************************************************************************
+ *
+ * Module Name: exresop - AML Interpreter operand/object resolution
+ *
+ *****************************************************************************/
+
+/*
+ * Copyright (C) 2000 - 2015, 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);
+}
Code Review / kvmfornfv.git / blobdiff