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2216 | Serge | 1 | /****************************************************************************** |
2 | * |
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3 | * Module Name: aslwalks.c - major analytical parse tree walks |
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4 | * |
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5 | *****************************************************************************/ |
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6 | |||
7 | /****************************************************************************** |
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8 | * |
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9 | * 1. Copyright Notice |
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10 | * |
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11 | * Some or all of this work - Copyright (c) 1999 - 2011, Intel Corp. |
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12 | * All rights reserved. |
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13 | * |
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14 | * 2. License |
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15 | * |
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16 | * 2.1. This is your license from Intel Corp. under its intellectual property |
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17 | * rights. You may have additional license terms from the party that provided |
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18 | * you this software, covering your right to use that party's intellectual |
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19 | * property rights. |
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20 | * |
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21 | * 2.2. Intel grants, free of charge, to any person ("Licensee") obtaining a |
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22 | * copy of the source code appearing in this file ("Covered Code") an |
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23 | * irrevocable, perpetual, worldwide license under Intel's copyrights in the |
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24 | * base code distributed originally by Intel ("Original Intel Code") to copy, |
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25 | * make derivatives, distribute, use and display any portion of the Covered |
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26 | * Code in any form, with the right to sublicense such rights; and |
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27 | * |
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28 | * 2.3. Intel grants Licensee a non-exclusive and non-transferable patent |
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29 | * license (with the right to sublicense), under only those claims of Intel |
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30 | * patents that are infringed by the Original Intel Code, to make, use, sell, |
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31 | * offer to sell, and import the Covered Code and derivative works thereof |
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32 | * solely to the minimum extent necessary to exercise the above copyright |
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33 | * license, and in no event shall the patent license extend to any additions |
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34 | * to or modifications of the Original Intel Code. No other license or right |
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35 | * is granted directly or by implication, estoppel or otherwise; |
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36 | * |
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37 | * The above copyright and patent license is granted only if the following |
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38 | * conditions are met: |
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39 | * |
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40 | * 3. Conditions |
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41 | * |
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42 | * 3.1. Redistribution of Source with Rights to Further Distribute Source. |
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43 | * Redistribution of source code of any substantial portion of the Covered |
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44 | * Code or modification with rights to further distribute source must include |
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45 | * the above Copyright Notice, the above License, this list of Conditions, |
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46 | * and the following Disclaimer and Export Compliance provision. In addition, |
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47 | * Licensee must cause all Covered Code to which Licensee contributes to |
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48 | * contain a file documenting the changes Licensee made to create that Covered |
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49 | * Code and the date of any change. Licensee must include in that file the |
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50 | * documentation of any changes made by any predecessor Licensee. Licensee |
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51 | * must include a prominent statement that the modification is derived, |
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52 | * directly or indirectly, from Original Intel Code. |
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53 | * |
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54 | * 3.2. Redistribution of Source with no Rights to Further Distribute Source. |
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55 | * Redistribution of source code of any substantial portion of the Covered |
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56 | * Code or modification without rights to further distribute source must |
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57 | * include the following Disclaimer and Export Compliance provision in the |
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58 | * documentation and/or other materials provided with distribution. In |
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59 | * addition, Licensee may not authorize further sublicense of source of any |
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60 | * portion of the Covered Code, and must include terms to the effect that the |
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61 | * license from Licensee to its licensee is limited to the intellectual |
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62 | * property embodied in the software Licensee provides to its licensee, and |
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63 | * not to intellectual property embodied in modifications its licensee may |
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64 | * make. |
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65 | * |
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66 | * 3.3. Redistribution of Executable. Redistribution in executable form of any |
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67 | * substantial portion of the Covered Code or modification must reproduce the |
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68 | * above Copyright Notice, and the following Disclaimer and Export Compliance |
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69 | * provision in the documentation and/or other materials provided with the |
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70 | * distribution. |
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71 | * |
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72 | * 3.4. Intel retains all right, title, and interest in and to the Original |
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73 | * Intel Code. |
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74 | * |
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75 | * 3.5. Neither the name Intel nor any other trademark owned or controlled by |
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76 | * Intel shall be used in advertising or otherwise to promote the sale, use or |
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77 | * other dealings in products derived from or relating to the Covered Code |
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78 | * without prior written authorization from Intel. |
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79 | * |
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80 | * 4. Disclaimer and Export Compliance |
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81 | * |
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82 | * 4.1. INTEL MAKES NO WARRANTY OF ANY KIND REGARDING ANY SOFTWARE PROVIDED |
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83 | * HERE. ANY SOFTWARE ORIGINATING FROM INTEL OR DERIVED FROM INTEL SOFTWARE |
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84 | * IS PROVIDED "AS IS," AND INTEL WILL NOT PROVIDE ANY SUPPORT, ASSISTANCE, |
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85 | * INSTALLATION, TRAINING OR OTHER SERVICES. INTEL WILL NOT PROVIDE ANY |
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86 | * UPDATES, ENHANCEMENTS OR EXTENSIONS. INTEL SPECIFICALLY DISCLAIMS ANY |
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87 | * IMPLIED WARRANTIES OF MERCHANTABILITY, NONINFRINGEMENT AND FITNESS FOR A |
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88 | * PARTICULAR PURPOSE. |
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89 | * |
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90 | * 4.2. IN NO EVENT SHALL INTEL HAVE ANY LIABILITY TO LICENSEE, ITS LICENSEES |
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91 | * OR ANY OTHER THIRD PARTY, FOR ANY LOST PROFITS, LOST DATA, LOSS OF USE OR |
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92 | * COSTS OF PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES, OR FOR ANY INDIRECT, |
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93 | * SPECIAL OR CONSEQUENTIAL DAMAGES ARISING OUT OF THIS AGREEMENT, UNDER ANY |
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94 | * CAUSE OF ACTION OR THEORY OF LIABILITY, AND IRRESPECTIVE OF WHETHER INTEL |
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95 | * HAS ADVANCE NOTICE OF THE POSSIBILITY OF SUCH DAMAGES. THESE LIMITATIONS |
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96 | * SHALL APPLY NOTWITHSTANDING THE FAILURE OF THE ESSENTIAL PURPOSE OF ANY |
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97 | * LIMITED REMEDY. |
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98 | * |
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99 | * 4.3. Licensee shall not export, either directly or indirectly, any of this |
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100 | * software or system incorporating such software without first obtaining any |
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101 | * required license or other approval from the U. S. Department of Commerce or |
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102 | * any other agency or department of the United States Government. In the |
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103 | * event Licensee exports any such software from the United States or |
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104 | * re-exports any such software from a foreign destination, Licensee shall |
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105 | * ensure that the distribution and export/re-export of the software is in |
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106 | * compliance with all laws, regulations, orders, or other restrictions of the |
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107 | * U.S. Export Administration Regulations. Licensee agrees that neither it nor |
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108 | * any of its subsidiaries will export/re-export any technical data, process, |
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109 | * software, or service, directly or indirectly, to any country for which the |
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110 | * United States government or any agency thereof requires an export license, |
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111 | * other governmental approval, or letter of assurance, without first obtaining |
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112 | * such license, approval or letter. |
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113 | * |
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114 | *****************************************************************************/ |
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115 | |||
116 | |||
117 | #include "aslcompiler.h" |
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118 | #include "aslcompiler.y.h" |
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119 | #include "acparser.h" |
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120 | #include "amlcode.h" |
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121 | |||
122 | |||
123 | #define _COMPONENT ACPI_COMPILER |
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124 | ACPI_MODULE_NAME ("aslwalks") |
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125 | |||
126 | |||
127 | /******************************************************************************* |
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128 | * |
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129 | * FUNCTION: AnMethodAnalysisWalkBegin |
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130 | * |
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131 | * PARAMETERS: ASL_WALK_CALLBACK |
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132 | * |
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133 | * RETURN: Status |
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134 | * |
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135 | * DESCRIPTION: Descending callback for the analysis walk. Check methods for: |
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136 | * 1) Initialized local variables |
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137 | * 2) Valid arguments |
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138 | * 3) Return types |
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139 | * |
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140 | ******************************************************************************/ |
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141 | |||
142 | ACPI_STATUS |
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143 | AnMethodAnalysisWalkBegin ( |
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144 | ACPI_PARSE_OBJECT *Op, |
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145 | UINT32 Level, |
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146 | void *Context) |
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147 | { |
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148 | ASL_ANALYSIS_WALK_INFO *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context; |
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149 | ASL_METHOD_INFO *MethodInfo = WalkInfo->MethodStack; |
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150 | ACPI_PARSE_OBJECT *Next; |
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151 | UINT32 RegisterNumber; |
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152 | UINT32 i; |
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153 | char LocalName[] = "Local0"; |
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154 | char ArgName[] = "Arg0"; |
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155 | ACPI_PARSE_OBJECT *ArgNode; |
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156 | ACPI_PARSE_OBJECT *NextType; |
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157 | ACPI_PARSE_OBJECT *NextParamType; |
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158 | UINT8 ActualArgs = 0; |
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159 | |||
160 | |||
161 | switch (Op->Asl.ParseOpcode) |
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162 | { |
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163 | case PARSEOP_METHOD: |
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164 | |||
165 | TotalMethods++; |
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166 | |||
167 | /* Create and init method info */ |
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168 | |||
169 | MethodInfo = UtLocalCalloc (sizeof (ASL_METHOD_INFO)); |
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170 | MethodInfo->Next = WalkInfo->MethodStack; |
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171 | MethodInfo->Op = Op; |
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172 | |||
173 | WalkInfo->MethodStack = MethodInfo; |
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174 | |||
175 | /* Get the name node, ignored here */ |
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176 | |||
177 | Next = Op->Asl.Child; |
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178 | |||
179 | /* Get the NumArguments node */ |
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180 | |||
181 | Next = Next->Asl.Next; |
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182 | MethodInfo->NumArguments = (UINT8) |
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183 | (((UINT8) Next->Asl.Value.Integer) & 0x07); |
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184 | |||
185 | /* Get the SerializeRule and SyncLevel nodes, ignored here */ |
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186 | |||
187 | Next = Next->Asl.Next; |
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188 | Next = Next->Asl.Next; |
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189 | ArgNode = Next; |
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190 | |||
191 | /* Get the ReturnType node */ |
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192 | |||
193 | Next = Next->Asl.Next; |
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194 | |||
195 | NextType = Next->Asl.Child; |
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196 | while (NextType) |
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197 | { |
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198 | /* Get and map each of the ReturnTypes */ |
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199 | |||
200 | MethodInfo->ValidReturnTypes |= AnMapObjTypeToBtype (NextType); |
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201 | NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG; |
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202 | NextType = NextType->Asl.Next; |
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203 | } |
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204 | |||
205 | /* Get the ParameterType node */ |
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206 | |||
207 | Next = Next->Asl.Next; |
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208 | |||
209 | NextType = Next->Asl.Child; |
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210 | while (NextType) |
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211 | { |
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212 | if (NextType->Asl.ParseOpcode == PARSEOP_DEFAULT_ARG) |
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213 | { |
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214 | NextParamType = NextType->Asl.Child; |
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215 | while (NextParamType) |
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216 | { |
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217 | MethodInfo->ValidArgTypes[ActualArgs] |= AnMapObjTypeToBtype (NextParamType); |
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218 | NextParamType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG; |
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219 | NextParamType = NextParamType->Asl.Next; |
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220 | } |
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221 | } |
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222 | else |
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223 | { |
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224 | MethodInfo->ValidArgTypes[ActualArgs] = |
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225 | AnMapObjTypeToBtype (NextType); |
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226 | NextType->Asl.ParseOpcode = PARSEOP_DEFAULT_ARG; |
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227 | ActualArgs++; |
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228 | } |
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229 | |||
230 | NextType = NextType->Asl.Next; |
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231 | } |
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232 | |||
233 | if ((MethodInfo->NumArguments) && |
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234 | (MethodInfo->NumArguments != ActualArgs)) |
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235 | { |
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236 | /* error: Param list did not match number of args */ |
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237 | } |
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238 | |||
239 | /* Allow numarguments == 0 for Function() */ |
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240 | |||
241 | if ((!MethodInfo->NumArguments) && (ActualArgs)) |
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242 | { |
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243 | MethodInfo->NumArguments = ActualArgs; |
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244 | ArgNode->Asl.Value.Integer |= ActualArgs; |
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245 | } |
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246 | |||
247 | /* |
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248 | * Actual arguments are initialized at method entry. |
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249 | * All other ArgX "registers" can be used as locals, so we |
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250 | * track their initialization. |
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251 | */ |
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252 | for (i = 0; i < MethodInfo->NumArguments; i++) |
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253 | { |
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254 | MethodInfo->ArgInitialized[i] = TRUE; |
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255 | } |
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256 | break; |
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257 | |||
258 | |||
259 | case PARSEOP_METHODCALL: |
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260 | |||
261 | if (MethodInfo && |
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262 | (Op->Asl.Node == MethodInfo->Op->Asl.Node)) |
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263 | { |
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264 | AslError (ASL_REMARK, ASL_MSG_RECURSION, Op, Op->Asl.ExternalName); |
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265 | } |
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266 | break; |
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267 | |||
268 | |||
269 | case PARSEOP_LOCAL0: |
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270 | case PARSEOP_LOCAL1: |
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271 | case PARSEOP_LOCAL2: |
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272 | case PARSEOP_LOCAL3: |
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273 | case PARSEOP_LOCAL4: |
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274 | case PARSEOP_LOCAL5: |
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275 | case PARSEOP_LOCAL6: |
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276 | case PARSEOP_LOCAL7: |
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277 | |||
278 | if (!MethodInfo) |
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279 | { |
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280 | /* |
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281 | * Local was used outside a control method, or there was an error |
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282 | * in the method declaration. |
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283 | */ |
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284 | AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName); |
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285 | return (AE_ERROR); |
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286 | } |
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287 | |||
288 | RegisterNumber = (Op->Asl.AmlOpcode & 0x000F); |
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289 | |||
290 | /* |
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291 | * If the local is being used as a target, mark the local |
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292 | * initialized |
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293 | */ |
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294 | if (Op->Asl.CompileFlags & NODE_IS_TARGET) |
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295 | { |
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296 | MethodInfo->LocalInitialized[RegisterNumber] = TRUE; |
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297 | } |
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298 | |||
299 | /* |
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300 | * Otherwise, this is a reference, check if the local |
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301 | * has been previously initialized. |
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302 | * |
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303 | * The only operator that accepts an uninitialized value is ObjectType() |
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304 | */ |
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305 | else if ((!MethodInfo->LocalInitialized[RegisterNumber]) && |
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306 | (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE)) |
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307 | { |
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308 | LocalName[strlen (LocalName) -1] = (char) (RegisterNumber + 0x30); |
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309 | AslError (ASL_ERROR, ASL_MSG_LOCAL_INIT, Op, LocalName); |
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310 | } |
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311 | break; |
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312 | |||
313 | |||
314 | case PARSEOP_ARG0: |
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315 | case PARSEOP_ARG1: |
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316 | case PARSEOP_ARG2: |
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317 | case PARSEOP_ARG3: |
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318 | case PARSEOP_ARG4: |
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319 | case PARSEOP_ARG5: |
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320 | case PARSEOP_ARG6: |
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321 | |||
322 | if (!MethodInfo) |
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323 | { |
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324 | /* |
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325 | * Arg was used outside a control method, or there was an error |
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326 | * in the method declaration. |
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327 | */ |
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328 | AslError (ASL_REMARK, ASL_MSG_LOCAL_OUTSIDE_METHOD, Op, Op->Asl.ExternalName); |
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329 | return (AE_ERROR); |
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330 | } |
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331 | |||
332 | RegisterNumber = (Op->Asl.AmlOpcode & 0x000F) - 8; |
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333 | ArgName[strlen (ArgName) -1] = (char) (RegisterNumber + 0x30); |
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334 | |||
335 | /* |
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336 | * If the Arg is being used as a target, mark the local |
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337 | * initialized |
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338 | */ |
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339 | if (Op->Asl.CompileFlags & NODE_IS_TARGET) |
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340 | { |
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341 | MethodInfo->ArgInitialized[RegisterNumber] = TRUE; |
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342 | } |
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343 | |||
344 | /* |
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345 | * Otherwise, this is a reference, check if the Arg |
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346 | * has been previously initialized. |
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347 | * |
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348 | * The only operator that accepts an uninitialized value is ObjectType() |
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349 | */ |
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350 | else if ((!MethodInfo->ArgInitialized[RegisterNumber]) && |
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351 | (Op->Asl.Parent->Asl.ParseOpcode != PARSEOP_OBJECTTYPE)) |
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352 | { |
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353 | AslError (ASL_ERROR, ASL_MSG_ARG_INIT, Op, ArgName); |
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354 | } |
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355 | |||
356 | /* Flag this arg if it is not a "real" argument to the method */ |
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357 | |||
358 | if (RegisterNumber >= MethodInfo->NumArguments) |
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359 | { |
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360 | AslError (ASL_REMARK, ASL_MSG_NOT_PARAMETER, Op, ArgName); |
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361 | } |
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362 | break; |
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363 | |||
364 | |||
365 | case PARSEOP_RETURN: |
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366 | |||
367 | if (!MethodInfo) |
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368 | { |
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369 | /* |
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370 | * Probably was an error in the method declaration, |
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371 | * no additional error here |
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372 | */ |
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373 | ACPI_WARNING ((AE_INFO, "%p, No parent method", Op)); |
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374 | return (AE_ERROR); |
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375 | } |
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376 | |||
377 | /* |
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378 | * A child indicates a possible return value. A simple Return or |
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379 | * Return() is marked with NODE_IS_NULL_RETURN by the parser so |
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380 | * that it is not counted as a "real" return-with-value, although |
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381 | * the AML code that is actually emitted is Return(0). The AML |
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382 | * definition of Return has a required parameter, so we are |
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383 | * forced to convert a null return to Return(0). |
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384 | */ |
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385 | if ((Op->Asl.Child) && |
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386 | (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG) && |
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387 | (!(Op->Asl.Child->Asl.CompileFlags & NODE_IS_NULL_RETURN))) |
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388 | { |
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389 | MethodInfo->NumReturnWithValue++; |
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390 | } |
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391 | else |
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392 | { |
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393 | MethodInfo->NumReturnNoValue++; |
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394 | } |
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395 | break; |
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396 | |||
397 | |||
398 | case PARSEOP_BREAK: |
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399 | case PARSEOP_CONTINUE: |
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400 | |||
401 | Next = Op->Asl.Parent; |
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402 | while (Next) |
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403 | { |
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404 | if (Next->Asl.ParseOpcode == PARSEOP_WHILE) |
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405 | { |
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406 | break; |
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407 | } |
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408 | Next = Next->Asl.Parent; |
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409 | } |
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410 | |||
411 | if (!Next) |
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412 | { |
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413 | AslError (ASL_ERROR, ASL_MSG_NO_WHILE, Op, NULL); |
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414 | } |
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415 | break; |
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416 | |||
417 | |||
418 | case PARSEOP_STALL: |
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419 | |||
420 | /* We can range check if the argument is an integer */ |
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421 | |||
422 | if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_INTEGER) && |
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423 | (Op->Asl.Child->Asl.Value.Integer > ACPI_UINT8_MAX)) |
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424 | { |
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425 | AslError (ASL_ERROR, ASL_MSG_INVALID_TIME, Op, NULL); |
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426 | } |
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427 | break; |
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428 | |||
429 | |||
430 | case PARSEOP_DEVICE: |
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431 | case PARSEOP_EVENT: |
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432 | case PARSEOP_MUTEX: |
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433 | case PARSEOP_OPERATIONREGION: |
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434 | case PARSEOP_POWERRESOURCE: |
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435 | case PARSEOP_PROCESSOR: |
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436 | case PARSEOP_THERMALZONE: |
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437 | |||
438 | /* |
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439 | * The first operand is a name to be created in the namespace. |
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440 | * Check against the reserved list. |
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441 | */ |
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442 | i = ApCheckForPredefinedName (Op, Op->Asl.NameSeg); |
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443 | if (i < ACPI_VALID_RESERVED_NAME_MAX) |
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444 | { |
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445 | AslError (ASL_ERROR, ASL_MSG_RESERVED_USE, Op, Op->Asl.ExternalName); |
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446 | } |
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447 | break; |
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448 | |||
449 | |||
450 | case PARSEOP_NAME: |
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451 | |||
452 | /* Typecheck any predefined names statically defined with Name() */ |
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453 | |||
454 | ApCheckForPredefinedObject (Op, Op->Asl.NameSeg); |
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455 | |||
456 | /* Special typechecking for _HID */ |
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457 | |||
458 | if (!ACPI_STRCMP (METHOD_NAME__HID, Op->Asl.NameSeg)) |
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459 | { |
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460 | Next = Op->Asl.Child->Asl.Next; |
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461 | AnCheckId (Next, ASL_TYPE_HID); |
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462 | } |
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463 | |||
464 | /* Special typechecking for _CID */ |
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465 | |||
466 | else if (!ACPI_STRCMP (METHOD_NAME__CID, Op->Asl.NameSeg)) |
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467 | { |
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468 | Next = Op->Asl.Child->Asl.Next; |
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469 | |||
470 | if ((Next->Asl.ParseOpcode == PARSEOP_PACKAGE) || |
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471 | (Next->Asl.ParseOpcode == PARSEOP_VAR_PACKAGE)) |
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472 | { |
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473 | Next = Next->Asl.Child; |
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474 | while (Next) |
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475 | { |
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476 | AnCheckId (Next, ASL_TYPE_CID); |
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477 | Next = Next->Asl.Next; |
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478 | } |
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479 | } |
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480 | else |
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481 | { |
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482 | AnCheckId (Next, ASL_TYPE_CID); |
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483 | } |
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484 | } |
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485 | break; |
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486 | |||
487 | |||
488 | default: |
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489 | break; |
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490 | } |
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491 | |||
492 | return (AE_OK); |
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493 | } |
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494 | |||
495 | |||
496 | /******************************************************************************* |
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497 | * |
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498 | * FUNCTION: AnMethodAnalysisWalkEnd |
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499 | * |
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500 | * PARAMETERS: ASL_WALK_CALLBACK |
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501 | * |
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502 | * RETURN: Status |
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503 | * |
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504 | * DESCRIPTION: Ascending callback for analysis walk. Complete method |
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505 | * return analysis. |
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506 | * |
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507 | ******************************************************************************/ |
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508 | |||
509 | ACPI_STATUS |
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510 | AnMethodAnalysisWalkEnd ( |
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511 | ACPI_PARSE_OBJECT *Op, |
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512 | UINT32 Level, |
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513 | void *Context) |
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514 | { |
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515 | ASL_ANALYSIS_WALK_INFO *WalkInfo = (ASL_ANALYSIS_WALK_INFO *) Context; |
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516 | ASL_METHOD_INFO *MethodInfo = WalkInfo->MethodStack; |
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517 | |||
518 | |||
519 | switch (Op->Asl.ParseOpcode) |
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520 | { |
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521 | case PARSEOP_METHOD: |
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522 | case PARSEOP_RETURN: |
||
523 | if (!MethodInfo) |
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524 | { |
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525 | printf ("No method info for method! [%s]\n", Op->Asl.Namepath); |
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526 | AslError (ASL_ERROR, ASL_MSG_COMPILER_INTERNAL, Op, |
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527 | "No method info for this method"); |
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528 | |||
529 | CmCleanupAndExit (); |
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530 | return (AE_AML_INTERNAL); |
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531 | } |
||
532 | break; |
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533 | |||
534 | default: |
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535 | break; |
||
536 | } |
||
537 | |||
538 | switch (Op->Asl.ParseOpcode) |
||
539 | { |
||
540 | case PARSEOP_METHOD: |
||
541 | |||
542 | WalkInfo->MethodStack = MethodInfo->Next; |
||
543 | |||
544 | /* |
||
545 | * Check if there is no return statement at the end of the |
||
546 | * method AND we can actually get there -- i.e., the execution |
||
547 | * of the method can possibly terminate without a return statement. |
||
548 | */ |
||
549 | if ((!AnLastStatementIsReturn (Op)) && |
||
550 | (!(Op->Asl.CompileFlags & NODE_HAS_NO_EXIT))) |
||
551 | { |
||
552 | /* |
||
553 | * No return statement, and execution can possibly exit |
||
554 | * via this path. This is equivalent to Return () |
||
555 | */ |
||
556 | MethodInfo->NumReturnNoValue++; |
||
557 | } |
||
558 | |||
559 | /* |
||
560 | * Check for case where some return statements have a return value |
||
561 | * and some do not. Exit without a return statement is a return with |
||
562 | * no value |
||
563 | */ |
||
564 | if (MethodInfo->NumReturnNoValue && |
||
565 | MethodInfo->NumReturnWithValue) |
||
566 | { |
||
567 | AslError (ASL_WARNING, ASL_MSG_RETURN_TYPES, Op, |
||
568 | Op->Asl.ExternalName); |
||
569 | } |
||
570 | |||
571 | /* |
||
572 | * If there are any RETURN() statements with no value, or there is a |
||
573 | * control path that allows the method to exit without a return value, |
||
574 | * we mark the method as a method that does not return a value. This |
||
575 | * knowledge can be used to check method invocations that expect a |
||
576 | * returned value. |
||
577 | */ |
||
578 | if (MethodInfo->NumReturnNoValue) |
||
579 | { |
||
580 | if (MethodInfo->NumReturnWithValue) |
||
581 | { |
||
582 | Op->Asl.CompileFlags |= NODE_METHOD_SOME_NO_RETVAL; |
||
583 | } |
||
584 | else |
||
585 | { |
||
586 | Op->Asl.CompileFlags |= NODE_METHOD_NO_RETVAL; |
||
587 | } |
||
588 | } |
||
589 | |||
590 | /* |
||
591 | * Check predefined method names for correct return behavior |
||
592 | * and correct number of arguments. Also, some special checks |
||
593 | * For GPE and _REG methods. |
||
594 | */ |
||
595 | if (ApCheckForPredefinedMethod (Op, MethodInfo)) |
||
596 | { |
||
597 | /* Special check for two names like _L01 and _E01 in same scope */ |
||
598 | |||
599 | ApCheckForGpeNameConflict (Op); |
||
600 | |||
601 | /* |
||
602 | * Special check for _REG: Must have an operation region definition |
||
603 | * within the same scope! |
||
604 | */ |
||
605 | ApCheckRegMethod (Op); |
||
606 | } |
||
607 | |||
608 | ACPI_FREE (MethodInfo); |
||
609 | break; |
||
610 | |||
611 | |||
612 | case PARSEOP_NAME: |
||
613 | |||
614 | /* Special check for two names like _L01 and _E01 in same scope */ |
||
615 | |||
616 | ApCheckForGpeNameConflict (Op); |
||
617 | break; |
||
618 | |||
619 | |||
620 | case PARSEOP_RETURN: |
||
621 | |||
622 | /* |
||
623 | * If the parent is a predefined method name, attempt to typecheck |
||
624 | * the return value. Only static types can be validated. |
||
625 | */ |
||
626 | ApCheckPredefinedReturnValue (Op, MethodInfo); |
||
627 | |||
628 | /* |
||
629 | * The parent block does not "exit" and continue execution -- the |
||
630 | * method is terminated here with the Return() statement. |
||
631 | */ |
||
632 | Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT; |
||
633 | |||
634 | /* Used in the "typing" pass later */ |
||
635 | |||
636 | Op->Asl.ParentMethod = MethodInfo->Op; |
||
637 | |||
638 | /* |
||
639 | * If there is a peer node after the return statement, then this |
||
640 | * node is unreachable code -- i.e., it won't be executed because of |
||
641 | * the preceeding Return() statement. |
||
642 | */ |
||
643 | if (Op->Asl.Next) |
||
644 | { |
||
645 | AslError (ASL_WARNING, ASL_MSG_UNREACHABLE_CODE, Op->Asl.Next, NULL); |
||
646 | } |
||
647 | break; |
||
648 | |||
649 | |||
650 | case PARSEOP_IF: |
||
651 | |||
652 | if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) && |
||
653 | (Op->Asl.Next) && |
||
654 | (Op->Asl.Next->Asl.ParseOpcode == PARSEOP_ELSE)) |
||
655 | { |
||
656 | /* |
||
657 | * This IF has a corresponding ELSE. The IF block has no exit, |
||
658 | * (it contains an unconditional Return) |
||
659 | * mark the ELSE block to remember this fact. |
||
660 | */ |
||
661 | Op->Asl.Next->Asl.CompileFlags |= NODE_IF_HAS_NO_EXIT; |
||
662 | } |
||
663 | break; |
||
664 | |||
665 | |||
666 | case PARSEOP_ELSE: |
||
667 | |||
668 | if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) && |
||
669 | (Op->Asl.CompileFlags & NODE_IF_HAS_NO_EXIT)) |
||
670 | { |
||
671 | /* |
||
672 | * This ELSE block has no exit and the corresponding IF block |
||
673 | * has no exit either. Therefore, the parent node has no exit. |
||
674 | */ |
||
675 | Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT; |
||
676 | } |
||
677 | break; |
||
678 | |||
679 | |||
680 | default: |
||
681 | |||
682 | if ((Op->Asl.CompileFlags & NODE_HAS_NO_EXIT) && |
||
683 | (Op->Asl.Parent)) |
||
684 | { |
||
685 | /* If this node has no exit, then the parent has no exit either */ |
||
686 | |||
687 | Op->Asl.Parent->Asl.CompileFlags |= NODE_HAS_NO_EXIT; |
||
688 | } |
||
689 | break; |
||
690 | } |
||
691 | |||
692 | return (AE_OK); |
||
693 | } |
||
694 | |||
695 | |||
696 | /******************************************************************************* |
||
697 | * |
||
698 | * FUNCTION: AnMethodTypingWalkEnd |
||
699 | * |
||
700 | * PARAMETERS: ASL_WALK_CALLBACK |
||
701 | * |
||
702 | * RETURN: Status |
||
703 | * |
||
704 | * DESCRIPTION: Ascending callback for typing walk. Complete the method |
||
705 | * return analysis. Check methods for: |
||
706 | * 1) Initialized local variables |
||
707 | * 2) Valid arguments |
||
708 | * 3) Return types |
||
709 | * |
||
710 | ******************************************************************************/ |
||
711 | |||
712 | ACPI_STATUS |
||
713 | AnMethodTypingWalkEnd ( |
||
714 | ACPI_PARSE_OBJECT *Op, |
||
715 | UINT32 Level, |
||
716 | void *Context) |
||
717 | { |
||
718 | UINT32 ThisNodeBtype; |
||
719 | |||
720 | |||
721 | switch (Op->Asl.ParseOpcode) |
||
722 | { |
||
723 | case PARSEOP_METHOD: |
||
724 | |||
725 | Op->Asl.CompileFlags |= NODE_METHOD_TYPED; |
||
726 | break; |
||
727 | |||
728 | case PARSEOP_RETURN: |
||
729 | |||
730 | if ((Op->Asl.Child) && |
||
731 | (Op->Asl.Child->Asl.ParseOpcode != PARSEOP_DEFAULT_ARG)) |
||
732 | { |
||
733 | ThisNodeBtype = AnGetBtype (Op->Asl.Child); |
||
734 | |||
735 | if ((Op->Asl.Child->Asl.ParseOpcode == PARSEOP_METHODCALL) && |
||
736 | (ThisNodeBtype == (ACPI_UINT32_MAX -1))) |
||
737 | { |
||
738 | /* |
||
739 | * The called method is untyped at this time (typically a |
||
740 | * forward reference). |
||
741 | * |
||
742 | * Check for a recursive method call first. |
||
743 | */ |
||
744 | if (Op->Asl.ParentMethod != Op->Asl.Child->Asl.Node->Op) |
||
745 | { |
||
746 | /* We must type the method here */ |
||
747 | |||
748 | TrWalkParseTree (Op->Asl.Child->Asl.Node->Op, |
||
749 | ASL_WALK_VISIT_UPWARD, NULL, |
||
750 | AnMethodTypingWalkEnd, NULL); |
||
751 | |||
752 | ThisNodeBtype = AnGetBtype (Op->Asl.Child); |
||
753 | } |
||
754 | } |
||
755 | |||
756 | /* Returns a value, save the value type */ |
||
757 | |||
758 | if (Op->Asl.ParentMethod) |
||
759 | { |
||
760 | Op->Asl.ParentMethod->Asl.AcpiBtype |= ThisNodeBtype; |
||
761 | } |
||
762 | } |
||
763 | break; |
||
764 | |||
765 | default: |
||
766 | break; |
||
767 | } |
||
768 | |||
769 | return (AE_OK); |
||
770 | } |
||
771 | |||
772 | |||
773 | /******************************************************************************* |
||
774 | * |
||
775 | * FUNCTION: AnOperandTypecheckWalkEnd |
||
776 | * |
||
777 | * PARAMETERS: ASL_WALK_CALLBACK |
||
778 | * |
||
779 | * RETURN: Status |
||
780 | * |
||
781 | * DESCRIPTION: Ascending callback for analysis walk. Complete method |
||
782 | * return analysis. |
||
783 | * |
||
784 | ******************************************************************************/ |
||
785 | |||
786 | ACPI_STATUS |
||
787 | AnOperandTypecheckWalkEnd ( |
||
788 | ACPI_PARSE_OBJECT *Op, |
||
789 | UINT32 Level, |
||
790 | void *Context) |
||
791 | { |
||
792 | const ACPI_OPCODE_INFO *OpInfo; |
||
793 | UINT32 RuntimeArgTypes; |
||
794 | UINT32 RuntimeArgTypes2; |
||
795 | UINT32 RequiredBtypes; |
||
796 | UINT32 ThisNodeBtype; |
||
797 | UINT32 CommonBtypes; |
||
798 | UINT32 OpcodeClass; |
||
799 | ACPI_PARSE_OBJECT *ArgOp; |
||
800 | UINT32 ArgType; |
||
801 | |||
802 | |||
803 | switch (Op->Asl.AmlOpcode) |
||
804 | { |
||
805 | case AML_RAW_DATA_BYTE: |
||
806 | case AML_RAW_DATA_WORD: |
||
807 | case AML_RAW_DATA_DWORD: |
||
808 | case AML_RAW_DATA_QWORD: |
||
809 | case AML_RAW_DATA_BUFFER: |
||
810 | case AML_RAW_DATA_CHAIN: |
||
811 | case AML_PACKAGE_LENGTH: |
||
812 | case AML_UNASSIGNED_OPCODE: |
||
813 | case AML_DEFAULT_ARG_OP: |
||
814 | |||
815 | /* Ignore the internal (compiler-only) AML opcodes */ |
||
816 | |||
817 | return (AE_OK); |
||
818 | |||
819 | default: |
||
820 | break; |
||
821 | } |
||
822 | |||
823 | OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); |
||
824 | if (!OpInfo) |
||
825 | { |
||
826 | return (AE_OK); |
||
827 | } |
||
828 | |||
829 | ArgOp = Op->Asl.Child; |
||
830 | RuntimeArgTypes = OpInfo->RuntimeArgs; |
||
831 | OpcodeClass = OpInfo->Class; |
||
832 | |||
833 | #ifdef ASL_ERROR_NAMED_OBJECT_IN_WHILE |
||
834 | /* |
||
835 | * Update 11/2008: In practice, we can't perform this check. A simple |
||
836 | * analysis is not sufficient. Also, it can cause errors when compiling |
||
837 | * disassembled code because of the way Switch operators are implemented |
||
838 | * (a While(One) loop with a named temp variable created within.) |
||
839 | */ |
||
840 | |||
841 | /* |
||
842 | * If we are creating a named object, check if we are within a while loop |
||
843 | * by checking if the parent is a WHILE op. This is a simple analysis, but |
||
844 | * probably sufficient for many cases. |
||
845 | * |
||
846 | * Allow Scope(), Buffer(), and Package(). |
||
847 | */ |
||
848 | if (((OpcodeClass == AML_CLASS_NAMED_OBJECT) && (Op->Asl.AmlOpcode != AML_SCOPE_OP)) || |
||
849 | ((OpcodeClass == AML_CLASS_CREATE) && (OpInfo->Flags & AML_NSNODE))) |
||
850 | { |
||
851 | if (Op->Asl.Parent->Asl.AmlOpcode == AML_WHILE_OP) |
||
852 | { |
||
853 | AslError (ASL_ERROR, ASL_MSG_NAMED_OBJECT_IN_WHILE, Op, NULL); |
||
854 | } |
||
855 | } |
||
856 | #endif |
||
857 | |||
858 | /* |
||
859 | * Special case for control opcodes IF/RETURN/WHILE since they |
||
860 | * have no runtime arg list (at this time) |
||
861 | */ |
||
862 | switch (Op->Asl.AmlOpcode) |
||
863 | { |
||
864 | case AML_IF_OP: |
||
865 | case AML_WHILE_OP: |
||
866 | case AML_RETURN_OP: |
||
867 | |||
868 | if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) |
||
869 | { |
||
870 | /* Check for an internal method */ |
||
871 | |||
872 | if (AnIsInternalMethod (ArgOp)) |
||
873 | { |
||
874 | return (AE_OK); |
||
875 | } |
||
876 | |||
877 | /* The lone arg is a method call, check it */ |
||
878 | |||
879 | RequiredBtypes = AnMapArgTypeToBtype (ARGI_INTEGER); |
||
880 | if (Op->Asl.AmlOpcode == AML_RETURN_OP) |
||
881 | { |
||
882 | RequiredBtypes = 0xFFFFFFFF; |
||
883 | } |
||
884 | |||
885 | ThisNodeBtype = AnGetBtype (ArgOp); |
||
886 | if (ThisNodeBtype == ACPI_UINT32_MAX) |
||
887 | { |
||
888 | return (AE_OK); |
||
889 | } |
||
890 | AnCheckMethodReturnValue (Op, OpInfo, ArgOp, |
||
891 | RequiredBtypes, ThisNodeBtype); |
||
892 | } |
||
893 | return (AE_OK); |
||
894 | |||
895 | default: |
||
896 | break; |
||
897 | } |
||
898 | |||
899 | /* Ignore the non-executable opcodes */ |
||
900 | |||
901 | if (RuntimeArgTypes == ARGI_INVALID_OPCODE) |
||
902 | { |
||
903 | return (AE_OK); |
||
904 | } |
||
905 | |||
906 | switch (OpcodeClass) |
||
907 | { |
||
908 | case AML_CLASS_EXECUTE: |
||
909 | case AML_CLASS_CREATE: |
||
910 | case AML_CLASS_CONTROL: |
||
911 | case AML_CLASS_RETURN_VALUE: |
||
912 | |||
913 | /* TBD: Change class or fix typechecking for these */ |
||
914 | |||
915 | if ((Op->Asl.AmlOpcode == AML_BUFFER_OP) || |
||
916 | (Op->Asl.AmlOpcode == AML_PACKAGE_OP) || |
||
917 | (Op->Asl.AmlOpcode == AML_VAR_PACKAGE_OP)) |
||
918 | { |
||
919 | break; |
||
920 | } |
||
921 | |||
922 | /* Reverse the runtime argument list */ |
||
923 | |||
924 | RuntimeArgTypes2 = 0; |
||
925 | while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes))) |
||
926 | { |
||
927 | RuntimeArgTypes2 <<= ARG_TYPE_WIDTH; |
||
928 | RuntimeArgTypes2 |= ArgType; |
||
929 | INCREMENT_ARG_LIST (RuntimeArgTypes); |
||
930 | } |
||
931 | |||
932 | while ((ArgType = GET_CURRENT_ARG_TYPE (RuntimeArgTypes2))) |
||
933 | { |
||
934 | RequiredBtypes = AnMapArgTypeToBtype (ArgType); |
||
935 | |||
936 | ThisNodeBtype = AnGetBtype (ArgOp); |
||
937 | if (ThisNodeBtype == ACPI_UINT32_MAX) |
||
938 | { |
||
939 | goto NextArgument; |
||
940 | } |
||
941 | |||
942 | /* Examine the arg based on the required type of the arg */ |
||
943 | |||
944 | switch (ArgType) |
||
945 | { |
||
946 | case ARGI_TARGETREF: |
||
947 | |||
948 | if (ArgOp->Asl.ParseOpcode == PARSEOP_ZERO) |
||
949 | { |
||
950 | /* ZERO is the placeholder for "don't store result" */ |
||
951 | |||
952 | ThisNodeBtype = RequiredBtypes; |
||
953 | break; |
||
954 | } |
||
955 | |||
956 | if (ArgOp->Asl.ParseOpcode == PARSEOP_INTEGER) |
||
957 | { |
||
958 | /* |
||
959 | * This is the case where an original reference to a resource |
||
960 | * descriptor field has been replaced by an (Integer) offset. |
||
961 | * These named fields are supported at compile-time only; |
||
962 | * the names are not passed to the interpreter (via the AML). |
||
963 | */ |
||
964 | if ((ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE_FIELD) || |
||
965 | (ArgOp->Asl.Node->Type == ACPI_TYPE_LOCAL_RESOURCE)) |
||
966 | { |
||
967 | AslError (ASL_ERROR, ASL_MSG_RESOURCE_FIELD, ArgOp, NULL); |
||
968 | } |
||
969 | else |
||
970 | { |
||
971 | AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, NULL); |
||
972 | } |
||
973 | break; |
||
974 | } |
||
975 | |||
976 | if ((ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) || |
||
977 | (ArgOp->Asl.ParseOpcode == PARSEOP_DEREFOF)) |
||
978 | { |
||
979 | break; |
||
980 | } |
||
981 | |||
982 | ThisNodeBtype = RequiredBtypes; |
||
983 | break; |
||
984 | |||
985 | |||
986 | case ARGI_REFERENCE: /* References */ |
||
987 | case ARGI_INTEGER_REF: |
||
988 | case ARGI_OBJECT_REF: |
||
989 | case ARGI_DEVICE_REF: |
||
990 | |||
991 | switch (ArgOp->Asl.ParseOpcode) |
||
992 | { |
||
993 | case PARSEOP_LOCAL0: |
||
994 | case PARSEOP_LOCAL1: |
||
995 | case PARSEOP_LOCAL2: |
||
996 | case PARSEOP_LOCAL3: |
||
997 | case PARSEOP_LOCAL4: |
||
998 | case PARSEOP_LOCAL5: |
||
999 | case PARSEOP_LOCAL6: |
||
1000 | case PARSEOP_LOCAL7: |
||
1001 | |||
1002 | /* TBD: implement analysis of current value (type) of the local */ |
||
1003 | /* For now, just treat any local as a typematch */ |
||
1004 | |||
1005 | /*ThisNodeBtype = RequiredBtypes;*/ |
||
1006 | break; |
||
1007 | |||
1008 | case PARSEOP_ARG0: |
||
1009 | case PARSEOP_ARG1: |
||
1010 | case PARSEOP_ARG2: |
||
1011 | case PARSEOP_ARG3: |
||
1012 | case PARSEOP_ARG4: |
||
1013 | case PARSEOP_ARG5: |
||
1014 | case PARSEOP_ARG6: |
||
1015 | |||
1016 | /* Hard to analyze argument types, sow we won't */ |
||
1017 | /* For now, just treat any arg as a typematch */ |
||
1018 | |||
1019 | /* ThisNodeBtype = RequiredBtypes; */ |
||
1020 | break; |
||
1021 | |||
1022 | case PARSEOP_DEBUG: |
||
1023 | break; |
||
1024 | |||
1025 | case PARSEOP_REFOF: |
||
1026 | case PARSEOP_INDEX: |
||
1027 | default: |
||
1028 | break; |
||
1029 | |||
1030 | } |
||
1031 | break; |
||
1032 | |||
1033 | case ARGI_INTEGER: |
||
1034 | default: |
||
1035 | break; |
||
1036 | } |
||
1037 | |||
1038 | |||
1039 | CommonBtypes = ThisNodeBtype & RequiredBtypes; |
||
1040 | |||
1041 | if (ArgOp->Asl.ParseOpcode == PARSEOP_METHODCALL) |
||
1042 | { |
||
1043 | if (AnIsInternalMethod (ArgOp)) |
||
1044 | { |
||
1045 | return (AE_OK); |
||
1046 | } |
||
1047 | |||
1048 | /* Check a method call for a valid return value */ |
||
1049 | |||
1050 | AnCheckMethodReturnValue (Op, OpInfo, ArgOp, |
||
1051 | RequiredBtypes, ThisNodeBtype); |
||
1052 | } |
||
1053 | |||
1054 | /* |
||
1055 | * Now check if the actual type(s) match at least one |
||
1056 | * bit to the required type |
||
1057 | */ |
||
1058 | else if (!CommonBtypes) |
||
1059 | { |
||
1060 | /* No match -- this is a type mismatch error */ |
||
1061 | |||
1062 | AnFormatBtype (StringBuffer, ThisNodeBtype); |
||
1063 | AnFormatBtype (StringBuffer2, RequiredBtypes); |
||
1064 | |||
1065 | sprintf (MsgBuffer, "[%s] found, %s operator requires [%s]", |
||
1066 | StringBuffer, OpInfo->Name, StringBuffer2); |
||
1067 | |||
1068 | AslError (ASL_ERROR, ASL_MSG_INVALID_TYPE, ArgOp, MsgBuffer); |
||
1069 | } |
||
1070 | |||
1071 | NextArgument: |
||
1072 | ArgOp = ArgOp->Asl.Next; |
||
1073 | INCREMENT_ARG_LIST (RuntimeArgTypes2); |
||
1074 | } |
||
1075 | break; |
||
1076 | |||
1077 | default: |
||
1078 | break; |
||
1079 | } |
||
1080 | |||
1081 | return (AE_OK); |
||
1082 | } |
||
1083 | |||
1084 | |||
1085 | /******************************************************************************* |
||
1086 | * |
||
1087 | * FUNCTION: AnOtherSemanticAnalysisWalkBegin |
||
1088 | * |
||
1089 | * PARAMETERS: ASL_WALK_CALLBACK |
||
1090 | * |
||
1091 | * RETURN: Status |
||
1092 | * |
||
1093 | * DESCRIPTION: Descending callback for the analysis walk. Checks for |
||
1094 | * miscellaneous issues in the code. |
||
1095 | * |
||
1096 | ******************************************************************************/ |
||
1097 | |||
1098 | ACPI_STATUS |
||
1099 | AnOtherSemanticAnalysisWalkBegin ( |
||
1100 | ACPI_PARSE_OBJECT *Op, |
||
1101 | UINT32 Level, |
||
1102 | void *Context) |
||
1103 | { |
||
1104 | ACPI_PARSE_OBJECT *ArgNode; |
||
1105 | ACPI_PARSE_OBJECT *PrevArgNode = NULL; |
||
1106 | const ACPI_OPCODE_INFO *OpInfo; |
||
1107 | |||
1108 | |||
1109 | OpInfo = AcpiPsGetOpcodeInfo (Op->Asl.AmlOpcode); |
||
1110 | |||
1111 | /* |
||
1112 | * Determine if an execution class operator actually does something by |
||
1113 | * checking if it has a target and/or the function return value is used. |
||
1114 | * (Target is optional, so a standalone statement can actually do nothing.) |
||
1115 | */ |
||
1116 | if ((OpInfo->Class == AML_CLASS_EXECUTE) && |
||
1117 | (OpInfo->Flags & AML_HAS_RETVAL) && |
||
1118 | (!AnIsResultUsed (Op))) |
||
1119 | { |
||
1120 | if (OpInfo->Flags & AML_HAS_TARGET) |
||
1121 | { |
||
1122 | /* |
||
1123 | * Find the target node, it is always the last child. If the traget |
||
1124 | * is not specified in the ASL, a default node of type Zero was |
||
1125 | * created by the parser. |
||
1126 | */ |
||
1127 | ArgNode = Op->Asl.Child; |
||
1128 | while (ArgNode->Asl.Next) |
||
1129 | { |
||
1130 | PrevArgNode = ArgNode; |
||
1131 | ArgNode = ArgNode->Asl.Next; |
||
1132 | } |
||
1133 | |||
1134 | /* Divide() is the only weird case, it has two targets */ |
||
1135 | |||
1136 | if (Op->Asl.AmlOpcode == AML_DIVIDE_OP) |
||
1137 | { |
||
1138 | if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) && |
||
1139 | (PrevArgNode) && |
||
1140 | (PrevArgNode->Asl.ParseOpcode == PARSEOP_ZERO)) |
||
1141 | { |
||
1142 | AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, |
||
1143 | Op, Op->Asl.ExternalName); |
||
1144 | } |
||
1145 | } |
||
1146 | else if (ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) |
||
1147 | { |
||
1148 | AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, |
||
1149 | Op, Op->Asl.ExternalName); |
||
1150 | } |
||
1151 | } |
||
1152 | else |
||
1153 | { |
||
1154 | /* |
||
1155 | * Has no target and the result is not used. Only a couple opcodes |
||
1156 | * can have this combination. |
||
1157 | */ |
||
1158 | switch (Op->Asl.ParseOpcode) |
||
1159 | { |
||
1160 | case PARSEOP_ACQUIRE: |
||
1161 | case PARSEOP_WAIT: |
||
1162 | case PARSEOP_LOADTABLE: |
||
1163 | break; |
||
1164 | |||
1165 | default: |
||
1166 | AslError (ASL_WARNING, ASL_MSG_RESULT_NOT_USED, |
||
1167 | Op, Op->Asl.ExternalName); |
||
1168 | break; |
||
1169 | } |
||
1170 | } |
||
1171 | } |
||
1172 | |||
1173 | |||
1174 | /* |
||
1175 | * Semantic checks for individual ASL operators |
||
1176 | */ |
||
1177 | switch (Op->Asl.ParseOpcode) |
||
1178 | { |
||
1179 | case PARSEOP_ACQUIRE: |
||
1180 | case PARSEOP_WAIT: |
||
1181 | /* |
||
1182 | * Emit a warning if the timeout parameter for these operators is not |
||
1183 | * ACPI_WAIT_FOREVER, and the result value from the operator is not |
||
1184 | * checked, meaning that a timeout could happen, but the code |
||
1185 | * would not know about it. |
||
1186 | */ |
||
1187 | |||
1188 | /* First child is the namepath, 2nd child is timeout */ |
||
1189 | |||
1190 | ArgNode = Op->Asl.Child; |
||
1191 | ArgNode = ArgNode->Asl.Next; |
||
1192 | |||
1193 | /* |
||
1194 | * Check for the WAIT_FOREVER case - defined by the ACPI spec to be |
||
1195 | * 0xFFFF or greater |
||
1196 | */ |
||
1197 | if (((ArgNode->Asl.ParseOpcode == PARSEOP_WORDCONST) || |
||
1198 | (ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER)) && |
||
1199 | (ArgNode->Asl.Value.Integer >= (UINT64) ACPI_WAIT_FOREVER)) |
||
1200 | { |
||
1201 | break; |
||
1202 | } |
||
1203 | |||
1204 | /* |
||
1205 | * The operation could timeout. If the return value is not used |
||
1206 | * (indicates timeout occurred), issue a warning |
||
1207 | */ |
||
1208 | if (!AnIsResultUsed (Op)) |
||
1209 | { |
||
1210 | AslError (ASL_WARNING, ASL_MSG_TIMEOUT, ArgNode, |
||
1211 | Op->Asl.ExternalName); |
||
1212 | } |
||
1213 | break; |
||
1214 | |||
1215 | case PARSEOP_CREATEFIELD: |
||
1216 | /* |
||
1217 | * Check for a zero Length (NumBits) operand. NumBits is the 3rd operand |
||
1218 | */ |
||
1219 | ArgNode = Op->Asl.Child; |
||
1220 | ArgNode = ArgNode->Asl.Next; |
||
1221 | ArgNode = ArgNode->Asl.Next; |
||
1222 | |||
1223 | if ((ArgNode->Asl.ParseOpcode == PARSEOP_ZERO) || |
||
1224 | ((ArgNode->Asl.ParseOpcode == PARSEOP_INTEGER) && |
||
1225 | (ArgNode->Asl.Value.Integer == 0))) |
||
1226 | { |
||
1227 | AslError (ASL_ERROR, ASL_MSG_NON_ZERO, ArgNode, NULL); |
||
1228 | } |
||
1229 | break; |
||
1230 | |||
1231 | default: |
||
1232 | break; |
||
1233 | } |
||
1234 | |||
1235 | return (AE_OK); |
||
1236 | }=><=>>> |