622 строки
17 KiB
C
622 строки
17 KiB
C
/******************************************************************************
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*
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* Module Name: nsprepkg - Validation of package objects for predefined names
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*
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*****************************************************************************/
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/*
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* Copyright (C) 2000 - 2013, Intel Corp.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions, and the following disclaimer,
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* without modification.
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* 2. Redistributions in binary form must reproduce at minimum a disclaimer
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* substantially similar to the "NO WARRANTY" disclaimer below
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* ("Disclaimer") and any redistribution must be conditioned upon
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* including a substantially similar Disclaimer requirement for further
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* binary redistribution.
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* 3. Neither the names of the above-listed copyright holders nor the names
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* of any contributors may be used to endorse or promote products derived
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* from this software without specific prior written permission.
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*
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* Alternatively, this software may be distributed under the terms of the
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* GNU General Public License ("GPL") version 2 as published by the Free
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* Software Foundation.
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*
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* NO WARRANTY
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* HOLDERS OR CONTRIBUTORS BE LIABLE FOR SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT,
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* STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING
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* IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGES.
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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("nsprepkg")
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/* Local prototypes */
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static acpi_status
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acpi_ns_check_package_list(struct acpi_predefined_data *data,
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const union acpi_predefined_info *package,
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union acpi_operand_object **elements, u32 count);
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static acpi_status
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acpi_ns_check_package_elements(struct acpi_predefined_data *data,
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union acpi_operand_object **elements,
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u8 type1,
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u32 count1,
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u8 type2, u32 count2, u32 start_index);
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_package
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*
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* PARAMETERS: data - Pointer to validation data structure
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* return_object_ptr - Pointer to the object returned from the
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* evaluation of a method or object
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check a returned package object for the correct count and
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* correct type of all sub-objects.
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*
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******************************************************************************/
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acpi_status
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acpi_ns_check_package(struct acpi_predefined_data *data,
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union acpi_operand_object **return_object_ptr)
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{
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union acpi_operand_object *return_object = *return_object_ptr;
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const union acpi_predefined_info *package;
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union acpi_operand_object **elements;
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acpi_status status = AE_OK;
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u32 expected_count;
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u32 count;
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u32 i;
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ACPI_FUNCTION_NAME(ns_check_package);
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/* The package info for this name is in the next table entry */
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package = data->predefined + 1;
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ACPI_DEBUG_PRINT((ACPI_DB_NAMES,
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"%s Validating return Package of Type %X, Count %X\n",
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data->pathname, package->ret_info.type,
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return_object->package.count));
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/*
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* For variable-length Packages, we can safely remove all embedded
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* and trailing NULL package elements
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*/
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acpi_ns_remove_null_elements(data, package->ret_info.type,
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return_object);
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/* Extract package count and elements array */
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elements = return_object->package.elements;
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count = return_object->package.count;
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/* The package must have at least one element, else invalid */
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if (!count) {
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ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
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"Return Package has no elements (empty)"));
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return (AE_AML_OPERAND_VALUE);
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}
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/*
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* Decode the type of the expected package contents
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*
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* PTYPE1 packages contain no subpackages
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* PTYPE2 packages contain sub-packages
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*/
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switch (package->ret_info.type) {
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case ACPI_PTYPE1_FIXED:
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/*
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* The package count is fixed and there are no sub-packages
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*
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* If package is too small, exit.
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* If package is larger than expected, issue warning but continue
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*/
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expected_count =
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package->ret_info.count1 + package->ret_info.count2;
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if (count < expected_count) {
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goto package_too_small;
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} else if (count > expected_count) {
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ACPI_DEBUG_PRINT((ACPI_DB_REPAIR,
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"%s: Return Package is larger than needed - "
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"found %u, expected %u\n",
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data->pathname, count,
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expected_count));
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}
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/* Validate all elements of the returned package */
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status = acpi_ns_check_package_elements(data, elements,
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package->ret_info.
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object_type1,
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package->ret_info.
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count1,
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package->ret_info.
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object_type2,
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package->ret_info.
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count2, 0);
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break;
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case ACPI_PTYPE1_VAR:
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/*
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* The package count is variable, there are no sub-packages, and all
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* elements must be of the same type
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*/
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for (i = 0; i < count; i++) {
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status = acpi_ns_check_object_type(data, elements,
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package->ret_info.
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object_type1, i);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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elements++;
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}
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break;
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case ACPI_PTYPE1_OPTION:
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/*
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* The package count is variable, there are no sub-packages. There are
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* a fixed number of required elements, and a variable number of
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* optional elements.
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*
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* Check if package is at least as large as the minimum required
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*/
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expected_count = package->ret_info3.count;
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if (count < expected_count) {
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goto package_too_small;
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}
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/* Variable number of sub-objects */
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for (i = 0; i < count; i++) {
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if (i < package->ret_info3.count) {
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/* These are the required package elements (0, 1, or 2) */
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status =
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acpi_ns_check_object_type(data, elements,
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package->
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ret_info3.
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object_type[i],
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i);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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} else {
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/* These are the optional package elements */
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status =
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acpi_ns_check_object_type(data, elements,
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package->
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ret_info3.
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tail_object_type,
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i);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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elements++;
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}
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break;
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case ACPI_PTYPE2_REV_FIXED:
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/* First element is the (Integer) revision */
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status = acpi_ns_check_object_type(data, elements,
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ACPI_RTYPE_INTEGER, 0);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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elements++;
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count--;
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/* Examine the sub-packages */
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status =
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acpi_ns_check_package_list(data, package, elements, count);
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break;
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case ACPI_PTYPE2_PKG_COUNT:
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/* First element is the (Integer) count of sub-packages to follow */
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status = acpi_ns_check_object_type(data, elements,
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ACPI_RTYPE_INTEGER, 0);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/*
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* Count cannot be larger than the parent package length, but allow it
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* to be smaller. The >= accounts for the Integer above.
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*/
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expected_count = (u32)(*elements)->integer.value;
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if (expected_count >= count) {
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goto package_too_small;
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}
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count = expected_count;
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elements++;
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/* Examine the sub-packages */
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status =
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acpi_ns_check_package_list(data, package, elements, count);
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break;
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case ACPI_PTYPE2:
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case ACPI_PTYPE2_FIXED:
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case ACPI_PTYPE2_MIN:
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case ACPI_PTYPE2_COUNT:
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case ACPI_PTYPE2_FIX_VAR:
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/*
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* These types all return a single Package that consists of a
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* variable number of sub-Packages.
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*
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* First, ensure that the first element is a sub-Package. If not,
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* the BIOS may have incorrectly returned the object as a single
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* package instead of a Package of Packages (a common error if
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* there is only one entry). We may be able to repair this by
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* wrapping the returned Package with a new outer Package.
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*/
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if (*elements
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&& ((*elements)->common.type != ACPI_TYPE_PACKAGE)) {
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/* Create the new outer package and populate it */
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status =
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acpi_ns_wrap_with_package(data, return_object,
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return_object_ptr);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Update locals to point to the new package (of 1 element) */
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return_object = *return_object_ptr;
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elements = return_object->package.elements;
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count = 1;
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}
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/* Examine the sub-packages */
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status =
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acpi_ns_check_package_list(data, package, elements, count);
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break;
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default:
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/* Should not get here if predefined info table is correct */
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ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
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"Invalid internal return type in table entry: %X",
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package->ret_info.type));
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return (AE_AML_INTERNAL);
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}
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return (status);
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package_too_small:
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/* Error exit for the case with an incorrect package count */
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ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
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"Return Package is too small - found %u elements, expected %u",
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count, expected_count));
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return (AE_AML_OPERAND_VALUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_package_list
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*
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* PARAMETERS: data - Pointer to validation data structure
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* package - Pointer to package-specific info for method
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* elements - Element list of parent package. All elements
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* of this list should be of type Package.
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* count - Count of subpackages
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*
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* RETURN: Status
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*
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* DESCRIPTION: Examine a list of subpackages
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_check_package_list(struct acpi_predefined_data *data,
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const union acpi_predefined_info *package,
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union acpi_operand_object **elements, u32 count)
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{
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union acpi_operand_object *sub_package;
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union acpi_operand_object **sub_elements;
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acpi_status status;
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u32 expected_count;
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u32 i;
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u32 j;
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/*
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* Validate each sub-Package in the parent Package
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*
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* NOTE: assumes list of sub-packages contains no NULL elements.
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* Any NULL elements should have been removed by earlier call
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* to acpi_ns_remove_null_elements.
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*/
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for (i = 0; i < count; i++) {
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sub_package = *elements;
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sub_elements = sub_package->package.elements;
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data->parent_package = sub_package;
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/* Each sub-object must be of type Package */
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status = acpi_ns_check_object_type(data, &sub_package,
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ACPI_RTYPE_PACKAGE, i);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/* Examine the different types of expected sub-packages */
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data->parent_package = sub_package;
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switch (package->ret_info.type) {
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case ACPI_PTYPE2:
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case ACPI_PTYPE2_PKG_COUNT:
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case ACPI_PTYPE2_REV_FIXED:
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/* Each subpackage has a fixed number of elements */
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expected_count =
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package->ret_info.count1 + package->ret_info.count2;
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if (sub_package->package.count < expected_count) {
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goto package_too_small;
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}
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status =
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acpi_ns_check_package_elements(data, sub_elements,
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package->ret_info.
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object_type1,
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package->ret_info.
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count1,
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package->ret_info.
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object_type2,
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package->ret_info.
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count2, 0);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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break;
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case ACPI_PTYPE2_FIX_VAR:
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/*
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* Each subpackage has a fixed number of elements and an
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* optional element
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*/
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expected_count =
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package->ret_info.count1 + package->ret_info.count2;
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if (sub_package->package.count < expected_count) {
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goto package_too_small;
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}
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status =
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acpi_ns_check_package_elements(data, sub_elements,
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package->ret_info.
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object_type1,
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package->ret_info.
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count1,
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package->ret_info.
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object_type2,
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sub_package->package.
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count -
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package->ret_info.
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count1, 0);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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break;
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case ACPI_PTYPE2_FIXED:
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/* Each sub-package has a fixed length */
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expected_count = package->ret_info2.count;
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if (sub_package->package.count < expected_count) {
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goto package_too_small;
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}
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/* Check the type of each sub-package element */
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for (j = 0; j < expected_count; j++) {
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status =
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acpi_ns_check_object_type(data,
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&sub_elements[j],
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package->
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ret_info2.
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object_type[j],
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j);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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}
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break;
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case ACPI_PTYPE2_MIN:
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/* Each sub-package has a variable but minimum length */
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expected_count = package->ret_info.count1;
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if (sub_package->package.count < expected_count) {
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goto package_too_small;
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}
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/* Check the type of each sub-package element */
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status =
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acpi_ns_check_package_elements(data, sub_elements,
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package->ret_info.
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object_type1,
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sub_package->package.
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count, 0, 0, 0);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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break;
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case ACPI_PTYPE2_COUNT:
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/*
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* First element is the (Integer) count of elements, including
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* the count field (the ACPI name is num_elements)
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*/
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status = acpi_ns_check_object_type(data, sub_elements,
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ACPI_RTYPE_INTEGER,
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0);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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/*
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* Make sure package is large enough for the Count and is
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* is as large as the minimum size
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*/
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expected_count = (u32)(*sub_elements)->integer.value;
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if (sub_package->package.count < expected_count) {
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goto package_too_small;
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}
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if (sub_package->package.count <
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package->ret_info.count1) {
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expected_count = package->ret_info.count1;
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goto package_too_small;
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}
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if (expected_count == 0) {
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/*
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* Either the num_entries element was originally zero or it was
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* a NULL element and repaired to an Integer of value zero.
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* In either case, repair it by setting num_entries to be the
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* actual size of the subpackage.
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*/
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expected_count = sub_package->package.count;
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(*sub_elements)->integer.value = expected_count;
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}
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/* Check the type of each sub-package element */
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status =
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acpi_ns_check_package_elements(data,
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(sub_elements + 1),
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package->ret_info.
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object_type1,
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(expected_count - 1),
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0, 0, 1);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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break;
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default: /* Should not get here, type was validated by caller */
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return (AE_AML_INTERNAL);
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}
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elements++;
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}
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return (AE_OK);
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package_too_small:
|
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/* The sub-package count was smaller than required */
|
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ACPI_WARN_PREDEFINED((AE_INFO, data->pathname, data->node_flags,
|
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"Return Sub-Package[%u] is too small - found %u elements, expected %u",
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i, sub_package->package.count, expected_count));
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return (AE_AML_OPERAND_VALUE);
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}
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/*******************************************************************************
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*
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* FUNCTION: acpi_ns_check_package_elements
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*
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* PARAMETERS: data - Pointer to validation data structure
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* elements - Pointer to the package elements array
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* type1 - Object type for first group
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* count1 - Count for first group
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* type2 - Object type for second group
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* count2 - Count for second group
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* start_index - Start of the first group of elements
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*
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* RETURN: Status
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*
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* DESCRIPTION: Check that all elements of a package are of the correct object
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* type. Supports up to two groups of different object types.
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*
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******************************************************************************/
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static acpi_status
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acpi_ns_check_package_elements(struct acpi_predefined_data *data,
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union acpi_operand_object **elements,
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u8 type1,
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u32 count1,
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u8 type2, u32 count2, u32 start_index)
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{
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union acpi_operand_object **this_element = elements;
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acpi_status status;
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u32 i;
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|
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/*
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* Up to two groups of package elements are supported by the data
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* structure. All elements in each group must be of the same type.
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* The second group can have a count of zero.
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*/
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for (i = 0; i < count1; i++) {
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status = acpi_ns_check_object_type(data, this_element,
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type1, i + start_index);
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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this_element++;
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}
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for (i = 0; i < count2; i++) {
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status = acpi_ns_check_object_type(data, this_element,
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type2,
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(i + count1 + start_index));
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if (ACPI_FAILURE(status)) {
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return (status);
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}
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this_element++;
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}
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return (AE_OK);
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}
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