274 lines
8.7 KiB
C
274 lines
8.7 KiB
C
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// SPDX-License-Identifier: BSD-3-Clause OR GPL-2.0
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/******************************************************************************
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*
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* Module Name: nsarguments - Validation of args for ACPI predefined methods
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*
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* Copyright (C) 2000 - 2019, Intel Corp.
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*
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*****************************************************************************/
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#include <acpi/acpi.h>
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#include "accommon.h"
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#include "acnamesp.h"
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#include "acpredef.h"
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#define _COMPONENT ACPI_NAMESPACE
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ACPI_MODULE_NAME("nsarguments")
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_argument_types
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*
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* PARAMETERS: info - Method execution information block
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*
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* RETURN: None
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*
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* DESCRIPTION: Check the incoming argument count and all argument types
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* against the argument type list for a predefined name.
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*
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******************************************************************************/
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void acpi_ns_check_argument_types(struct acpi_evaluate_info *info)
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{
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u16 arg_type_list;
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u8 arg_count;
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u8 arg_type;
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u8 user_arg_type;
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u32 i;
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/*
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* If not a predefined name, cannot typecheck args, because
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* we have no idea what argument types are expected.
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* Also, ignore typecheck if warnings/errors if this method
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* has already been evaluated at least once -- in order
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* to suppress repetitive messages.
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*/
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if (!info->predefined || (info->node->flags & ANOBJ_EVALUATED)) {
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return;
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}
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arg_type_list = info->predefined->info.argument_list;
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arg_count = METHOD_GET_ARG_COUNT(arg_type_list);
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/* Typecheck all arguments */
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for (i = 0; ((i < arg_count) && (i < info->param_count)); i++) {
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arg_type = METHOD_GET_NEXT_TYPE(arg_type_list);
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user_arg_type = info->parameters[i]->common.type;
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if (user_arg_type != arg_type) {
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ACPI_WARN_PREDEFINED((AE_INFO, info->full_pathname,
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ACPI_WARN_ALWAYS,
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"Argument #%u type mismatch - "
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"Found [%s], ACPI requires [%s]",
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(i + 1),
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acpi_ut_get_type_name
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(user_arg_type),
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acpi_ut_get_type_name(arg_type)));
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/* Prevent any additional typechecking for this method */
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info->node->flags |= ANOBJ_EVALUATED;
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}
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_acpi_compliance
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*
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* PARAMETERS: pathname - Full pathname to the node (for error msgs)
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* node - Namespace node for the method/object
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* predefined - Pointer to entry in predefined name table
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*
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* RETURN: None
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*
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* DESCRIPTION: Check that the declared parameter count (in ASL/AML) for a
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* predefined name is what is expected (matches what is defined in
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* the ACPI specification for this predefined name.)
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*
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******************************************************************************/
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void
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acpi_ns_check_acpi_compliance(char *pathname,
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struct acpi_namespace_node *node,
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const union acpi_predefined_info *predefined)
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{
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u32 aml_param_count;
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u32 required_param_count;
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if (!predefined || (node->flags & ANOBJ_EVALUATED)) {
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return;
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}
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/* Get the ACPI-required arg count from the predefined info table */
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required_param_count =
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METHOD_GET_ARG_COUNT(predefined->info.argument_list);
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/*
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* If this object is not a control method, we can check if the ACPI
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* spec requires that it be a method.
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*/
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if (node->type != ACPI_TYPE_METHOD) {
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if (required_param_count > 0) {
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/* Object requires args, must be implemented as a method */
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ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname,
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ACPI_WARN_ALWAYS,
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"Object (%s) must be a control method with %u arguments",
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acpi_ut_get_type_name(node->
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type),
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required_param_count));
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} else if (!required_param_count
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&& !predefined->info.expected_btypes) {
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/* Object requires no args and no return value, must be a method */
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ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname,
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ACPI_WARN_ALWAYS,
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"Object (%s) must be a control method "
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"with no arguments and no return value",
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acpi_ut_get_type_name(node->
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type)));
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}
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return;
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}
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/*
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* This is a control method.
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* Check that the ASL/AML-defined parameter count for this method
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* matches the ACPI-required parameter count
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*
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* Some methods are allowed to have a "minimum" number of args (_SCP)
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* because their definition in ACPI has changed over time.
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*
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* Note: These are BIOS errors in the declaration of the object
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*/
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aml_param_count = node->object->method.param_count;
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if (aml_param_count < required_param_count) {
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ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS,
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"Insufficient arguments - "
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"ASL declared %u, ACPI requires %u",
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aml_param_count,
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required_param_count));
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} else if ((aml_param_count > required_param_count)
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&& !(predefined->info.
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argument_list & ARG_COUNT_IS_MINIMUM)) {
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ACPI_BIOS_ERROR_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS,
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"Excess arguments - "
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"ASL declared %u, ACPI requires %u",
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aml_param_count,
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required_param_count));
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}
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_argument_count
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*
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* PARAMETERS: pathname - Full pathname to the node (for error msgs)
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* node - Namespace node for the method/object
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* user_param_count - Number of args passed in by the caller
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* predefined - Pointer to entry in predefined name table
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*
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* RETURN: None
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*
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* DESCRIPTION: Check that incoming argument count matches the declared
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* parameter count (in the ASL/AML) for an object.
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*
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******************************************************************************/
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void
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acpi_ns_check_argument_count(char *pathname,
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struct acpi_namespace_node *node,
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u32 user_param_count,
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const union acpi_predefined_info *predefined)
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{
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u32 aml_param_count;
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u32 required_param_count;
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if (node->flags & ANOBJ_EVALUATED) {
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return;
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}
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if (!predefined) {
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/*
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* Not a predefined name. Check the incoming user argument count
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* against the count that is specified in the method/object.
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*/
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if (node->type != ACPI_TYPE_METHOD) {
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if (user_param_count) {
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ACPI_INFO_PREDEFINED((AE_INFO, pathname,
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ACPI_WARN_ALWAYS,
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"%u arguments were passed to a non-method ACPI object (%s)",
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user_param_count,
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acpi_ut_get_type_name
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(node->type)));
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}
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return;
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}
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/*
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* This is a control method. Check the parameter count.
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* We can only check the incoming argument count against the
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* argument count declared for the method in the ASL/AML.
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*
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* Emit a message if too few or too many arguments have been passed
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* by the caller.
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*
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* Note: Too many arguments will not cause the method to
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* fail. However, the method will fail if there are too few
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* arguments and the method attempts to use one of the missing ones.
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*/
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aml_param_count = node->object->method.param_count;
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if (user_param_count < aml_param_count) {
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ACPI_WARN_PREDEFINED((AE_INFO, pathname,
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ACPI_WARN_ALWAYS,
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"Insufficient arguments - "
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"Caller passed %u, method requires %u",
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user_param_count,
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aml_param_count));
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} else if (user_param_count > aml_param_count) {
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ACPI_INFO_PREDEFINED((AE_INFO, pathname,
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ACPI_WARN_ALWAYS,
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"Excess arguments - "
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"Caller passed %u, method requires %u",
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user_param_count,
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aml_param_count));
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}
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return;
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}
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/*
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* This is a predefined name. Validate the user-supplied parameter
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* count against the ACPI specification. We don't validate against
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* the method itself because what is important here is that the
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* caller is in conformance with the spec. (The arg count for the
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* method was checked against the ACPI spec earlier.)
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*
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* Some methods are allowed to have a "minimum" number of args (_SCP)
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* because their definition in ACPI has changed over time.
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*/
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required_param_count =
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METHOD_GET_ARG_COUNT(predefined->info.argument_list);
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if (user_param_count < required_param_count) {
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ACPI_WARN_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS,
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"Insufficient arguments - "
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"Caller passed %u, ACPI requires %u",
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user_param_count, required_param_count));
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} else if ((user_param_count > required_param_count) &&
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!(predefined->info.argument_list & ARG_COUNT_IS_MINIMUM)) {
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ACPI_INFO_PREDEFINED((AE_INFO, pathname, ACPI_WARN_ALWAYS,
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"Excess arguments - "
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"Caller passed %u, ACPI requires %u",
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user_param_count, required_param_count));
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}
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}
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